JPS5911016Y2 - Smoke evacuation roof opening/closing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an opening/closing device for a smoke exhaust system installed in the upper part of a building in order to exhaust smoke generated by a fire or the like in a building to the outside.

The smoke evacuation device used in this invention is a roof-type device that is installed on the roof of a building, and is usually closed, but in an emergency, the upper part can be opened to the left and right to serve the purpose of smoke evacuation. reach

Conventionally, the opening and closing operations of this type of smoke exhaust roof were performed manually and had to be operated using wires from the floor, making it impossible to open and close multiple smoke exhaust roofs at the same time.

Also, it is troublesome to close and restore an open smoke exhaust roof to its original condition, especially if the smoke exhaust roof has a drain on one side, first remove the smoke exhaust roof from the other side without a drain. After closing the smoke exhaust roof, it was necessary to close the smoke exhaust roof on the side of the drainer and place the drainer on top of it, which was complicated.

The present invention uses a fluid pressure cylinder to automate the above opening/closing operation.

An embodiment of the present invention will be described in detail with reference to the drawings.

Figure 2 is A-A in Figure 1 showing the plan view of the smoke evacuation roof.
It is a sectional view, and 1 is the frame of the main body installed on the roof of the building.

Reference numerals 2 and 2a designate smoke evacuation roofs that rotate to open and close around hinges 3 and 3a attached to the framework 1, respectively, and have latch receivers 5 and 5a fixed to their upper ends.

Also, a gutter-like drainer 4 is installed along the upper edge of the smoke exhaust roof 2a to prevent rainwater from entering when the roof is closed.

Links 6, 7, 6a, 7a for opening and closing the roofs are provided on the inside of both smoke exhaust roofs, and links 6 and 7
and 6a and 7a are respectively bendably connected.

The upper ends of the links 6, 6a are pivotally supported inside the roof, and the inner ends of the links 7, 7a are pivotally supported by a pivot shaft 24 attached to the frame 1 side of the main body.

Springs 9, 9a are stretched between the links 7, 7a and the fixed beam 8 at the top of the roof, and when both smoke exhaust roofs are closed as shown in FIG. 2, the springs 9, 9a are stretched. Link 7,7
It has an auxiliary force that tries to raise A.

Further, wires 10 fixed to the outer ends of the links 7, 7a,
10a is constructed by one wire, each link 7,
Wires 10, 10a fixed to frame 1 pass through pulleys 11, 11a and 12, 12a fixed to framework 1,
Pulley 1 at the tip of the piston rod of the roof opening/closing cylinder 13
It is wound in 3H.

The roof opening/closing cylinder 13 is attached to the framework 1 parallel to the axis of the fixed beam 8 as shown in FIG.

When compressed air is supplied to the cylinder, its piston rod strokes to the left in the figure, pulling the wires 10, 10a, and connecting the links 7, 7a as shown in FIG.
is pulled down against the springs 9, 9a to maintain the smoke exhaust roofs 2, 2a in a closed state.

When pressurized air is discharged from the roof opening/closing cylinder 13, the links 7, 7a are moved to the pivot shaft 2 by the biasing force of the springs 9, 9a.
The roof opening/closing cylinder 1 rotates upwards centering on 4.
The piston rod 3 is pulled out and rotates the smoke evacuation roofs 2, 2a from side to side around the respective hinges 3, 3a through the links 6, 6a, opening upward and reaching the open position shown by the broken line in Fig. 2. .

In FIG. 2 and FIGS. 4 to 6, a camshaft 16 is rotatably mounted on a bracket 14.14H fixed to the fixed beam 8, and cams 17, 1 are provided at both ends of the camshaft.
7 3 are opposed to the latch claws 18 and 18 3, respectively.

19, 19 3 is a latch box, and the bracket 1
4,143, and as shown in FIG.
a, and the latches 20, 203 normally protrude and fit into the latch holes 5', 5a' of the latch receivers 5, 5a connected to the smoke exhaust roofs 2, 2a to lock the smoke exhaust roof. However, the cam 17.17 a is tilted and the claws 18, 18 3
When the latches 20 and 20a are moved to the right, the latches 20, 20a move backward and are removed from the latch holes.

A wire 22 is fixed to the end of the arm 21 fixed to the camshaft 16, and this wire 22 is connected to a piston rod of a latch actuation cylinder 23 in FIG.

The latch actuating cylinder 23 is attached to the framework 1, and when the compressed air in the cylinder is discharged, the piston rod is lowered in the figure by the return spring in the cylinder, and the wire 2
2. Rotate the camshaft 16 via the arm 21.

The cams 17, 171 tilt to the right in FIG. 5 against the latch return spring 15 fixed to the bracket 14 at one end, move the pawl 18 to the right, and as described above, the latch 20 is disengaged and ejected. The smoke roof will be opened.

When compressed air is supplied to the latch actuating cylinder 23, the piston rod rises and the cam 17.17a returns to the position shown in FIGS. 3 and 5 by the action of the latch return spring 15.
The latches 20, 20a protrude again and engage with the latch holes 5' of the latch receivers 5.

Near the pivot shafts 24 of the links 7 and 7a, there is a two-stage lever 26.26H mechanism (omitted in FIG. 2, schematically shown in FIG. 3) that sequentially operates when closing the smoke evacuation roof. It is provided.

That is, as shown in FIGS. 6 and 7, arms 25, 253 are attached to the links 7, 7a near the pivot shafts 24, and levers 26, 26 are attached to the positions facing the two arms, respectively.
a is connected and fixed to a rod 27 at a constant angle α, and the rod 27 is rotatably mounted on the frame 1.

28, 28a are brackets that support the rod 27 on the frame 1, and 29 is a return spring that is stretched so as to hold the lever 26a vertically in normal conditions.

Compressed air is supplied to the roof opening/closing cylinder 13 to pull the wires 10, 10a, and while closing both smoke exhaust roofs from the open position, the links 7, 7a gradually rotate downward, and the arms 25 a is the lever 26 in the vertical direction
a, and the rotation of the link 7a stops.

6 and 7 show this state. Although the link 7a is stopped, the arm 25 of the link 7 is not yet in contact with the lever 26, so the wire 10 is only moved by the operation of the roof opening/closing cylinder 13. is pulled, and the link 7 rotates downward.

When the link 7 further rotates and the arm 25 comes into contact with the lever 26, the lever 26 makes an angle α with the vertical direction as shown in FIG.
Since it is pushed by the arm 25, it rotates about the rod 27, and at the same time, the lever 26a, which is fixed on the same axis, also rotates.

Therefore, the link 7a stops for a while and then begins to rotate together with the link 7 again.

This state is shown in FIGS. 8 and 9, in which the link 7a rotates with a slight delay from the link 7.

Therefore, after the smoke exhaust roof 2 connected to the link 7 is closed, the drain of the smoke exhaust roof 2a connected to the link 7a can be placed on top of it and closed.

FIG. 10 is an air circuit diagram of this embodiment, where 30 is a compressed air source, 31 is a 3-way, 2-position electromagnetic switching valve, 32 is a manual switching valve, 13 is a roof opening/closing cylinder, and 23 is a latch operating cylinder. It is.

Next, the overall operation of this embodiment will be explained.

If smoke is generated due to a fire or the like, the electromagnetic switching valve 31 is automatically activated by a smoke detector and switched to the 31-b position, or the manual switching valve 32 is activated manually by the person who discovered the smoke. When the switch is switched to the 32-b position, the pressurized air in the roof opening/closing cylinder 13 and the latch actuating cylinder 23 is exhausted.

In Figures 2 and 3, the piston of the smoke exhaust roof opening/closing cylinder 13 is free, and the links 6, 7, 6a, 7a are attached to open the smoke exhaust roof due to the elastic force of the springs 9, 9a. be given power.

At the same time, due to the action of a return spring (not shown) in the latch actuating cylinder 23 of FIG. The actuation of the cams 17, 17a disengages the latches 20, 20a and the latch receivers 5, 5a, releasing the restraint on both smoke exhaust roofs and allowing them to move freely.

Therefore, the spring force from the springs 9 and 9a causes both smoke exhaust roofs to
The smoke exhaust port opens according to the stroke of the roof opening/closing cylinder 13.

The two-stage levers 26, 263 move from the state shown in FIG.
The state shown in the figure will be reached and this state will be maintained.

In order to return the smoke exhaust roof to its original closed state after the smoke has been exhausted, compressed air is supplied to each cylinder by switching the electromagnetic switching valve 31 to the 31-a position and the manual switching valve 32 to the 32-a position. do it.

Compressed air supplied to the latch actuation cylinder 23 compresses the return spring within the cylinder and moves the piston rod upwardly.

Therefore, the camshaft 16 is rotated counterclockwise by the return force of the latch return spring 15, and the latches 20, 203 are given a force to protrude from the latch box by the spring in the latch box 19.19a. .

At the same time, the compressed air supplied to the roof opening/closing cylinder 13 is
Pull the wires 10, 10a and bend the links 6, 7, 6a, 7a against the springs 9, 9a to begin closing both smoke exhaust roofs.

During the closing movement, the aforementioned two-step levers 26, 26
a is activated, the left smoke exhaust roof 2a with a drainer 4 stops temporarily, and the right smoke exhaust roof 2 without a drainer closes completely in advance. When the smoke exhaust roof 2a on the left side is closed, the cut 4 is placed on the upper side of the smoke exhaust roof 2 on the right side, so that there is no possibility that the two will collide on the way to return to their original positions.

When each smoke exhaust roof is closed, the latches 20, 20a project into the holes 5', 5a' of the launch receivers 5, 5a by the spring force built into the latch boxes 19, 19a, and the smoke exhaust roof ends. held closed.

The mechanism for keeping the smoke exhaust roof closed and held by the latch described above is a safety device to prevent it from opening when a strong locust blows.If there is no such concern, the latch mechanism can be omitted and the roof can be opened and closed.
3 may be used to maintain the closed position via the wires 10, 10a.

In this case, the latch actuation cylinder is of course unnecessary.

In the embodiments described above, the sequential operations for closing both smoke exhaust roofs were carried out mechanically, but in the following second embodiment, the operations were carried out pneumatically.

In the second embodiment, one roof opening/closing cylinder is provided for each smoke exhaust roof.
A throttle is provided in the air supply pipe of one cylinder to delay its operation time, and all other equipment is exactly the same as in the first embodiment.

FIG. 11 is an air circuit diagram of the second embodiment, in which a branch pipe 33 is provided in the supply pipe of the roof opening/closing cylinder 13 on the side of the smoke exhaust roof 2, and a restrictor 34 and a check valve 35 are arranged in parallel in the middle. A roof opening/closing cylinder 13a on the side of the smoke exhaust roof 2a with a drainer is provided via a circuit.

Therefore, when compressed air is discharged from both cylinders and both smoke exhaust roofs are opened, the exhaust speeds of both cylinders are approximately equal, and when the smoke exhaust roofs are closed, the exhaust speed of both cylinders is approximately equal, but when compressed air is supplied and the smoke exhaust roofs are closed, the throttle 34 is Therefore, the inflow speed into the roof opening/closing cylinder 13a is slower than that in the roof opening/closing cylinder 13a, and the smoke exhaust roof 2a closes with a delay, allowing the drainers to overlap safely.

In this embodiment as well, latch-related devices may be omitted as in the first embodiment.

Further, instead of the throttle, the operation may be performed sequentially using a switching valve, and this third embodiment is shown in FIGS. 12 and 13.

FIG. 12 shows the circuit diagram of the second embodiment.
4. In place of the check valve 35, a three-way, two-position switching valve 36 is provided.

The operating roller 37 of this switching valve is as shown in FIG.
A cam 3 attached to the lower surface of a smoke exhaust roof 2 that does not have a drainer
The cam 38 is opposite to the roller 3 when the smoke exhaust roof is closed.
7, switches the switching valve 36 as shown in the figure, and supplies compressed air to the roof opening/closing cylinder 13H on the side having the drainer.

When the smoke exhaust roof 2 is not closed, the switching valve is in the position 36-a, and the compressed air source and the roof opening/closing cylinder 13a are cut off.

Therefore, when closing both retractable roofs, the side without a drainer closes first, and then the drainer side closes.

According to the present invention shown in the above embodiments, it is possible not only to automatically open and close a large number of smoke evacuation roofs located at high places, but also to close a smoke evacuation roof equipped with a drainer. It has the effect of safely and reliably carrying out.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the first embodiment of the present invention, Fig. 2 is a longitudinal sectional view taken along line A-A in Fig. 1, and Fig. 3 is a side sectional view taken along line B-B in Fig. 1. Figure 4 is a detailed view of the section C in Figure 2, Figure 5 is a view taken in the direction of the arrow in Figure 4, Figure 6 is a side view of the sequential actuating device, Figure 7 is a front view of the same, and Figure 8 is a detailed view of the section C in Figure 2. FIG. 6 is an explanatory diagram of the action, FIG. 9 is an explanatory diagram of the action of FIG. 7, and FIG. 10 is an air circuit diagram. FIG. 11 is an air circuit diagram of the second embodiment, FIG. 12 is an air circuit diagram of the third embodiment, and FIG. 13 is an explanatory diagram of main parts of the third embodiment. 1... Body frame, 2, 2a... Smoke exhaust roof, 4... Drainer, 5, 5a... Latch receiver, 6, 6 a, 7,7 a...Link, 9,9 a...Spring, 10.22...
... Wire, 13 ... Roof opening/closing cylinder, 20
, 20 a... Latch, 23... Latch actuation cylinder, 25, 25 a... Arm,
26, 26a...Two-stage lever, 30...
・Compressed air source, 31... Solenoid switching valve, 32...
...Manual switching valve.

Claims (4)

[Scope of utility model registration request] (1) A roof opening/closing cylinder that operates a link mechanism for opening and closing the left and right smoke exhaust roofs by supplying and discharging pressurized fluid, and a roof opening/closing cylinder that is installed between the link and a fixed part near the top of the roof to open the smoke exhaust roof. A latch actuating cylinder that disengages the closed state holding latch of the smoke exhaust roof by discharging pressure fluid, and a latch actuating cylinder that releases the latch that holds the smoke exhaust roof in the closed state by discharging pressure fluid. A smoke evacuation roof opening/closing device comprising a sequential actuation device that is stopped and closed later than the side of the roof that does not have a flashing. (2) The sequential actuation device consists of an arm provided on each link on both sides, and two levers that are pivotally supported on the frame opposite to this, both levers are fixedly connected at a certain angle, and the drainer The smoke evacuation roof opening/closing device according to claim 1, wherein the lever on the smoke evacuation roof side having the structure is normally held vertically by a spring. (3) The sequential operating device includes two roof opening/closing cylinders that operate the link mechanisms of the smoke exhaust roofs on both sides, and a throttle and a check valve provided in the pressure fluid supply path of the roof opening/closing cylinder on the side with the drainer. A smoke evacuation roof opening/closing device according to claim 1, which comprises a parallel circuit of: (4) The sequential operating device operates the two roof opening/closing cylinders that respectively operate the link mechanisms of the smoke exhaust roofs on both sides, the switching valve provided in the pressure fluid supply path of the roof opening/closing cylinder on the side with the drainer, and the drainer. When the roof is closed, it does not have
The smoke exhaust roof opening/closing device according to claim 1, which comprises a cam for operating the switching valve and supplying pressure fluid to the cylinder.