JPS598730B2 - Damper opening/closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a damper opening/closing device capable of rapidly operating damper blades provided in a duct or the like.

BACKGROUND ART In order to prevent disasters, etc., there are cases where the blades of a damper provided in a duct are actuated in an emergency to close or open the duct.

The damper opening/closing device used in such cases generally has a rotary shaft that is connected to the damper blade and is rotatable around the axis, and a rotary shaft that rotates in a fixed rotation direction. A driving spring that biases, an electric drive device that drives the rotating shaft to the set position against the biasing force of the drive spring, and a rotating shaft that rotates when the rotating shaft is rotated to the set position. The blades of the damper are held in either the open or closed set position by being locked with a locked member fixed to the shaft to prevent the sled rotation shaft from returning. and an unlatching device that causes the damper blade to be rapidly driven to the other open or closed state according to the biasing force of the drive spring by unlatching the latched member. There is.

Therefore, when the rotation shaft latched to the set position is activated and the rotation prevention state is released, the rotation shaft is rapidly rotated according to the biasing force of the spring, so that the rotation shaft is not connected to the rotation shaft. The impeller of the damper is activated suddenly.

However, in conventional damper opening/closing devices, the hanging device is usually constructed using one locking lever, so a comparison is required to ensure that the locking V-bar is driven. It was necessary to use an electromagnet with a large output.

That is, for example, as described in Japanese Patent Publication No. 55-30181, one latching lever is provided for latching the damper blade to the set position against the biasing force of one driving spring. It is common for there to be.

In this case, normally a biasing force is applied to the locking lever toward the non-latching position based on the strong biasing force of the drive spring, but the locking lever does not move despite vibrations of the device. In order to reliably hold the holder in the latching position, a relatively large biasing force in the opposite direction must be applied by a spring or the like, which is sufficient to counter the biasing force toward the non-latching position.

Therefore, when suddenly driving the damper blade, in order to drive the latching member to its non-latching position, the latching lever must be moved once against the relatively large urging force of the spring or the like.
An electromagnet with a relatively large power had to be provided for driving.

Therefore, in emergencies where the damper must be suddenly closed or opened, it is often the case that the general power supply line is out of power, and it is desirable to operate the damper urgently using a small capacity emergency power source such as a battery, so it is necessary to have a large output. In the conventional case of using an electromagnet with a large power consumption, the number of damper switching devices driven per one power source is severely limited.

Purpose of the Invention The present invention has been made against the background of the above circumstances,
The purpose of this is to securely lock the damper blades in the set position regardless of vibrations of the device, and to open and close the damper equipped with a locking and unloading device that can reliably lock and unload the blades with low power consumption in an emergency. The purpose is to supply equipment.

Structure of the Invention In order to achieve the above object, the damper opening/closing device of the present invention has the following features: It is rotatably provided between a latching position where the member is latched and a non-latching position where the latching member is unlatched, and when it is in the non-latching position, it is in the latching position. (2) a latch lever that is biased toward the latching position and rotated toward the non-latching position based on the biasing force of the drive spring in the latching position; and (2) engaging with the latching lever. A non-latching mechanism in which the engaging device is provided with an engaging portion that engages with the latching V bar to lock the latching lever in the latching position, and the latching knob is disengaged from the latching knob. (3) an operating lever that is rotatably provided between the engagement position and the engagement position and is always biased toward the engagement position; The present invention is characterized in that it includes an electromagnet that disengages the action lever from the locking lever and releases the locking state of the locking lever by rotationally driving the locking lever to the engagement position.

Effects of the Invention With this structure, the latching lever that latches the damper blades to the set position is reliably locked (rotation-prevented) at the latching position by engagement with the operating lever, and the damper When the blade is hooked or removed from the set position, an electromagnet connected to one end of the operating lever rotationally drives the operating lever to engage the operating lever and the latch lever, that is, to lock the latch lever. The condition will be removed.

At this time, since the biasing force for biasing the operating lever to its engagement position is relatively small for returning the operating lever to its engagement position, regardless of the strong biasing force of the drive spring, the electromagnet Since it is sufficient to drive the acting member against the small biasing force and the relatively small frictional force caused by the engagement between the acting lever and the locking lever, the damper vane can be driven by an electromagnet with a small output and low power consumption. It becomes possible to hang and unload from the set position.

Therefore, it is possible to drive the opening/closing devices of a large number of dampers even with a relatively small capacity power source such as an emergency power source.

EXAMPLE Hereinafter, an example of the present invention will be described in detail based on the drawings.

In FIGS. 1 and 2, reference numeral 2 denotes a rotation shaft of a damper opening/closing device that is rotatably provided on the machine frame 4 via a bearing metal 3 and is connected to a damper blade (not shown) to open and close it. A coil-shaped drive spring 6 is coaxially wound around the base end of the rotating shaft 2 and has one end fixed to the base end and the other end fixed to the machine frame 4. .

This drive spring 6 constantly applies a relatively large biasing force to the rotating shaft 2 in the counterclockwise direction in FIG.

At the middle part of the rotating shaft 2, there is a claw 10K as a latching part formed on a latching member 8 (to be described later): a latching surface 12 to be latched and an output shaft 20 fixed to the machine frame 4K; rotation position detection The outer periphery is provided with a cam surface 16 for activating a limit switch 14 for use, and an elongated hole 18 formed in an arc shape and an output shaft 2.
A disk-shaped cam plate 22 is fitted as a stopper member, which is provided with an eccentric pin 20 provided at a position eccentric from the axis of the cam plate.

Note that instead of the claw 10, a pin that engages with the cam surface 16K may be provided on the latching V-bar 8.

A stopper 24 fixed to the machine frame 4 is inserted into the elongated hole 18, and the rotation angle of the rotation shaft 2 is regulated within a range allowed by the length of the elongated hole 18.

The latch lever 8, which has a claw 10 at its tip, is connected to the output shaft 2.
When the claw 10 is rotated to the set position against the biasing force of the return spring 6, the claw 10 engages the locking surface 1 of the cam plate 22.
The intermediate portion thereof is rotatably attached to the machine frame 4 by a pin 26 so as to be hooked to the machine frame 2.

This latch lever 8 is biased by a spring 28 so as to rotate counterclockwise in FIG.

The working lever 30 is rotatably attached to the machine frame 4 by a pin 32 at its intermediate portion in a posture substantially facing the latching lever 8, and when in the latching state with the latching surface 12. The proximal end 34 of the latch lever 8 is engaged with an engaging portion 35 provided on the operating member 30, so that rotation in the clockwise direction is prevented (locked).

That is, the working V-bar 30 is rotatably provided between an engagement position where it engages with the latching V-bar 8 and a non-engaging position where the latching lever 8 is unlocked.

The operating lever 30 is constantly urged by a spring 36 to rotate counterclockwise in FIG.
In the vicinity of the other end 38, it abuts against the side surface of a high-temperature action lever 40, which is disposed parallel to the action lever 30, to prevent further rotation of the action lever 30.

A core 44 of an electromagnet 42 fixed to the machine frame 4 is connected to the other end 38 of the operating lever 30, so that when the core 44 is attracted to the electromagnet 42, the operating lever 30 resists the biasing force of the spring 36. It is designed to be driven eight times clockwise in FIG.

The distance between the pin 32 and the other end 38 is equal to the distance between the pin 32 and the engaging portion 35.
The spacing is approximately three times larger than the distance between the lever 30 and the lever 30, so that the operating lever 30 exerts a lever action.

The high temperature action member 40 is biased by a spring 46 to rotate clockwise in FIG.
Rotation is prevented by being hooked to the protrusion 50 of No.8.

Reference numeral 52 denotes an inspection pull wire, the base end of which is connected to the tip of an arm 54 fixed at right angles to the operating lever 30.

As is clear from FIG. 1, the angles of the latch 12 and the pawl 10 hooked thereto with respect to the respective rotation centers are such that when they are in the hooked state, a strong biasing force is applied to the drive spring 60. When the locking lever 8 is turned, the locking lever 8 is rotated clockwise against a relatively small biasing force of the spring 28.

That is, the latching lever 8 is provided so as to be rotatable between a latching position in which it latches with the cam plate 22 and a non-latching position, and in the non-latching position, it is always attached by being directed toward the latching position. However, in the latching position, it is configured so that it can be rotated toward the non-latching position.

In the machine frame 4K, an electric motor 56 with a reduction gear, which is an electric drive device for driving the rotating shaft 2 to its set position against the biasing force of the drive spring 6, connects its output shaft 57 and the rotating shaft 2. fixed in parallel.

This output shaft 57 is provided with a machine frame 4 for detecting the rotational position.
A cam 59 that operates a limit switch 58 fixed to vC and a crank arm 62 having a crank pin 60 at its tip are fitted.

One end of the connecting rod 66, which has an elongated hole 64 having a length substantially equal to or longer than the rotational diameter of the crank pin 60 in the longitudinal direction, is pivotally attached to the crank arm 62 by the crank pin 60K.
The elongated hole 64 is engaged with the eccentric pin 20, so that the cam plate 22 and the crank arm 62 are connected via the connecting rod 66.

That is, mechanically, the crank arm 62 is the smallest link, and the rotating shaft 2 and the output shaft 5 are the opposite links.
7, a so-called lever crank mechanism is configured, and the rotational driving force of the output shaft 570 rotates the rotation shaft 2 to the set position.

In addition, 68 and 69 indicate the operating position of the rotation shaft 2, and an operation handle to which the rotation shaft 2K is fixed for rotating the rotation shaft 2 to the set position by manual operation, and a damper blade (not shown) are fixed. It is the central axis.

The damper opening/closing device configured as described above includes a control circuit shown in FIG. 3.

That is, the positive electrode of the DC power supply 70 is connected to the common terminal 74C of the limit switch 14 and the common terminal 67C of the limit switch 58 via the terminal A and the diode.

The normally closed terminal 74B of the limit switch 14 is connected to the electromagnet 42,
It is connected to the negative pole of the DC power supply 70 via the terminal E1 and an operation switch 78 which is an inspection switch or an output switch of a smoke detector (not shown).

The normally closed terminal 76A of the limit switch 58 is connected to the AR. It is connected to the negative electrode of the N source 70 and also to the normally closed terminal 74A of the limit switch 14 via the terminal D and the set switch 80.

Further, the normally closed terminal 76A of the limit switch 58 is connected to the negative pole of the DC power supply 70 via the other normally closed contact 82 of the limit switch 14, the terminal F, and the set state confirmation lamp 84.

Note that the contact 86 is linked to the operation of the limit switch 14, and both ends thereof are connected to the terminal G and the terminal F.

The operation of this embodiment will be explained below.

When the damper switch is in the set state, the latching lever 8 is positioned at its latching position, and the action V'
With the bar 30 in its engaged position, the latching lever 8
is locked, and the damper blades are securely held in the set position regardless of vibrations, etc.

FIGS. 1 to 3 show this state. In this set state, when an inspection switch is operated or an output switch such as smoke detection is operated and the operation switch 78 is closed, a current is passed through the electromagnet 42 and the core 44 is attracted.

As a result, the working V-bar 30 is rotated clockwise against the biasing force of the spring 36 and is positioned at its non-engaging position, so that the engaging portion 35 of the V-bar 30
The engaged state between the latching member 8 and the proximal end portion 34 of the latching V-bar 8, in other words, the latching member 8 is released from its locked state.

Therefore, the latching V-bar 8 is connected to its pawl 10 and
2 is rotated clockwise against the biasing force of the spring 28, so that the hook 10 and the hook surface 12 are unlatched and rotated. The moving shaft 2 is rapidly rotated by the biasing force of the drive spring 6 until the end of the elongated hole 18 comes into contact with the stopper 24.

At the same time, due to the operation of the rotation shaft 2, the blades of the damper connected to the rotation shaft 2 are rapidly driven until the duct (not shown) is fully opened or fully opened, and the cam plate 2
The second cam surface 16 actuates the limit switch 14 and the eccentric pin 20 is moved to the end of the elongated hole 64.

It should be noted that the above operation is performed by melting the internal fuse as the temperature of the thermal fuse 48 rises and causing the protrusion 50 to melt.
is retracted, and the high temperature acting member 40 is connected to the spring 46.
The operating lever 30 is rotated clockwise by the urging force of
The same thing happens when the is rotated clockwise.

Also, the inspection pull wire 52 is pulled and the operating lever 30
A similar operation occurs when the is rotated clockwise.

Here, the cam surface 12, the latching lever 8, the operating lever 30,
! Even if the electromagnet 42 outputs a relatively small driving force (attractive force), the unlatching device consisting of the magnet 42, etc.
The rotating shaft 2, which is biased counterclockwise in FIG. 1 due to the strong elastic force of the drive spring 6, can be easily removed from the set position.

That is, by engaging the latching member 8 with the operating lever 30, it is reliably locked in the latching position, and when unlatching the latching member 8, the electromagnet 42 connected to one end of the operating lever 30 is attached to the spring 36. The locking lever 8 is unlocked by driving the operating lever 30 against the force and the frictional force between the engaging portion 35 of the operating lever 30 and the base end portion 34 of the locking lever 8.

The biasing force of the spring 36 for biasing the operating lever 30 toward its engagement position may be small regardless of the strong elastic force of the driving spring 60, and the engagement between the operating lever 30 and the latching member 8 may be small. Since the frictional force caused by the coupling is small, an electromagnet with small output and low power consumption is sufficient.

Therefore, it is possible to hang and unhook a large number of damper blades from the set position even with a relatively small-capacity power source such as an emergency power source.

Since the locking lever 8 is locked by the operating lever 30vc, the locking lever 8 is stably held at the locking position even if the biasing force of the spring 36 is set to be small and even if the device vibrates.

Furthermore, since the spring 28 imparts a counterclockwise biasing length to the latch lever 8 that is biased by the drive spring 6, the biasing force of the latch lever 8 in the clockwise direction can be adjusted to a small value. ing.

This has the advantage that the frictional force between the locking lever 8 and the operating lever 30 is reduced, the operating member 30 is made smaller than the electromagnet 42, and the operating lever 30 is driven more lightly and smoothly by the electromagnet 42.

Moreover, since the electromagnet 42 only needs to drive the operating lever 30 using the lever action of the operating lever 30, the electromagnet 42
has the advantage of smaller output and lower power consumption.

Moreover, even if the working V-bar 30 is configured so as not to produce much leverage, the effects of the present invention can still be obtained.

In the above state, the set switch 80 is used to drive the rotating shaft 2 to the set position in preparation for the next damper operation.
When the closing operation is performed, electric current is supplied to the electric motor 56 with a reduction gear to drive its output shaft 57, and the cam 59 and crank arm 62 are rotated clockwise.

In the limit switch 58, the switch lever is opened immediately after the cam 590 starts rotating, the contact is switched, and the common terminal 76C and the normally closed terminal 76B are closed, so the operation of the set switch 80 is released. Also, the output shaft 57 rotates once and the cam 59 moves again to the limit switch 58.
The electric motor 56 is driven until the motor is activated.

In this process, when the connecting rod 66 pivoted on the crank pin 60 is driven downward in FIG.
Further separation between the crank pin 60 and the crank pin 60 is prevented, the eccentric pin 20 is moved together with the connecting rod 66, and the cam plate 22, the rotation shaft 2, and a damper (not shown) are slowly rotated clockwise.

Therefore, the cam plate 22 reaches the set position just before the dead center when the cam 16 leaves the limit switch 14 and puts it in a non-operating state, and the connecting rod 66 and the crank arm 62 overlap.

At this time, when the latching surface 12 passes the pawl 10, the latching lever 8 rotates counterclockwise according to the biasing force of the spring 28, and at the same time, the latching surface 12 and the pawl 10 are latched.
Until then, the lever 30 is prevented from rotating by contacting the base end 34 of the latch bar 8, and the lever 30 rotates counterclockwise according to the biasing force of the spring 36.
4 and the engaging portion 35 of the operating lever 30 are engaged.

As a result, the clockwise rotation (return) of the latching V bar 8 is prevented (locked), and the counterclockwise rotation of the cam plate 22 and rotation shaft 2 is also prevented, and these are placed in the set position. will be maintained.

The crank arm 62 that has passed the dead center is rotated approximately half a turn until the cam 59 activates the limit switch 58 and then stops, and the set state confirmation lamp 84 lights up.

In this process, the connecting rod 66 moves upward in FIG. 1 along with the movement of the crank pin 60 without being interfered with by the elongated hole 64 with the eccentric pin 20, and the damper opening/closing device is shown in FIGS. 1 to 3. It returns to the state.

The above-mentioned embodiment is merely one embodiment of the present invention, and various modifications may be made to the present invention without departing from the spirit thereof.

[Brief explanation of drawings]

1 and 2 are a top view with the top cover removed and a side view with a portion cut away, showing an embodiment of the present invention. FIG. 3 is a wiring diagram showing the control circuit of FIG. 1 and the second embodiment. 2: Rotation shaft, 6: Drive spring, 8: Latching lever, 10: Claw (latching part), 22: Cam plate (latched member) 30: Action V
bar, 35: engaging portion, 42: electromagnet, 56: electric motor with reduction gear (electric drive device).

Claims (1)

[Claims] 1. A rotary shaft connected to a damper blade and provided rotatably around an axis, a drive spring that urges the rotary shaft in a certain rotational direction, and a rotary shaft that is rotatable about the axis. an electric drive device that drives the rotating shaft to the cent position against the biasing force of the driving arm; and a latched lock that is fixed to the rotating shaft when the rotating shaft is rotated to the set position. Holding the damper blade in one of open and closed positions by engaging the member and preventing the return of the moving shaft, while releasing the retainer from the engaged member in response to a command signal. A damper opening/closing device comprising: a hanging device for rapidly driving the blades of the damper to either open or close according to the biasing force of the drive spring, the hanging device comprising: A latching part for latching a latching member, between a latching position where the latching part latches the latching member and a non-latching position where the latching part releases the latching from the latching member. In the non-latching position, it is urged toward the normal hanging position, but in the hanging position, it is rotated toward the non-shaping position based on the biasing force of the drive spring. a latching lever that can be moved to the latching position; and an engaging portion that engages with the latching lever, the engaging portion that engages with the latching V-bar to lock the latching lever in its latching position. an operating lever that is rotatably provided between a position and a disengaged position where engagement with the locking lever is released, and is always biased toward the engaged position; and one end of the operating lever. by rotating the operating member to its disengaged position in accordance with the command signal, the operating lever is disengaged from the locking lever, and the locking state of the locking V-bar is released. A damper opening/closing device comprising an electromagnet.