JPH0612479Y2 - Damper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a damper device which is attached to an air passage and opens and closes the air passage as necessary.

[Prior Art] For example, a duct device that works in conjunction with a ventilation fan
Many of the blades for opening and closing the air passage are designed to be moved by a rotary solenoid as seen in Japanese Utility Model Laid-Open No. 63-46750. What is disclosed in the above publication is
A blade is provided in a cylindrical body that forms an air passage, and an axis integrated with this blade is turned by a rotary solenoid to open the air passage by orienting the blade in a direction parallel to the flow direction of the air. The air passage is closed by arranging it at a right angle to the flow direction of. In this type of damper device, the output shaft of the rotary solenoid and the shaft of the blade are connected by a gear and are arranged in the air passage of the main body together with the rotary solenoid.

[Problems to be Solved by the Invention] In the conventional damper device described above, since the rotary solenoid and the power transmission system are in the air passage, and the power transmission system is composed of a member such as a gear having a large bulk, a pressure loss occurs. High and easy to get dirty. In addition, since the blade rotates in the air passage, there is a gap between the inner peripheral surface of the main body and the outer peripheral portion of the blade for smooth rotation of the blade even in the closed state, and power consumption is large. Contains.

The present invention has been made in order to solve such a conventional problem, and an object thereof is to obtain a damper device having low pressure loss, gentle closing operation, no impact noise, and relatively low power consumption. is there.

[Means for Solving the Problems] In a damper device according to the present invention, a bearing held by a support leg at the center of an opening on one end side of a tubular body forming an air passage extends in the direction of the center line in the tubular body. A support shaft is supported so as to be slidable, a blade for closing the opening on the one end side of the cylinder is attached to one end of the support shaft, and the support shaft is urged by an elastic member in the direction in which the blade closes, A structure in which a support shaft is slid through a connecting cable by a drive motor provided outside the air passage formed by the tubular body, and particularly, an air cylinder that resists the bias of the elastic member is provided at the shaft end portion of the support shaft. And a cylinder formed at the rear of the case covering the support shaft.

[Operation] In the damper device of the present invention, the drive shaft provided outside the cylinder forming the air passage causes the support shaft supported in the center line direction inside the cylinder forming the air passage to be connected via the connecting cable. By sliding, the blade that closes the opening of the tubular body is separated from the opening in the center line direction by the biasing force of the elastic member that biases the support shaft, and the opening is opened. Will be able to. Further, the opened blade can be closed by the bias of the elastic member, and at the time of closing, the air in the cylinder is decompressed while being degassed, so that the brake is applied and the blade is closed gently.

[Embodiment] All the drawings show one embodiment of the damper device according to the present invention. That is, in the damper device of this example, an opening / closing member for opening / closing the air passage is attached to a cylindrical tube body 1 forming a linear air passage, and a geared motor 2 for driving which drives the opening / closing member is installed in the air cylinder. It is provided outside the passage. A flange 3 is provided on one end side of the cylindrical body 1 and a part (upper part in the illustrated example) of the flange 3 is formed to have a large protrusion. The flange 3 is provided with a T-shaped support leg 4 formed of a portion that crosses the diameter line of the opening of the tubular body 1 and a portion that extends vertically downward from the central portion. This support leg 4
The reinforcing rectifying blade 5 is integrally formed by bending the end of the blade forward. The reinforcing rectifying vanes 5 function as a channel type or an angle type having high strength for the support legs 4 and, at the same time, fulfill the function of rectifying the air flow passing through the corresponding portions. An opening flange 6 having an opening wider than the opening of the cylinder 1 is attached to the front side of the cylinder 1 flange 3. A bearing 7 is mounted on the center line of the tubular body 1 of the support leg 4, and a tubular case 8 having one end closed and containing the bearing 7 is provided in the tubular body 1.
Is fixed to the support leg 4 with the closed end on the center line of the cylinder body 1 toward the rear end (left end in the sectional view) of the cylindrical body 1. The case 8 has a cylinder 9 having an open front portion formed at the rear end thereof. The cylinder 9 has a vent hole 10 at the rear thereof.
Is provided. A support shaft 11 supported by a bearing 7 and slidable on the center line of the case 8 is inserted into the case 8. The tip end side of the support shaft 11 extends from the bearing 7 mounted at the center of the support leg 4 to the center of the opening flange 6, and the tip end thereof is in contact with the opening portion of the opening flange 6 so as to close the opening like a lid. A blade 12 serving as a circular plate-shaped opening / closing member is fixed at the center thereof. Support shaft 11
A mounting plate 13 is attached to the end portion side of the case 8 by a nut 14 so as not to come off, and a shaft end portion is slidably fitted in a cylinder 9 of the case 8 to form an air cylinder. A spring 15 as an elastic member is interposed between the mounting plate 13 and the end surface of the bearing 7 on the inner side of the case 8, and the support shaft 11 is supported by the spring force of the spring 15.
2 is pushed back to a position where it hits the edge of the opening flange 6 and seals the opening.

A pair of opposed guide plates 16 that extend in parallel to the center line and are close to the mounting plate 13 mounted on the support shaft 11 in the case 8 are attached to the support leg 4 in a cantilever manner. The guide plate 16 restricts rotation of the mounting plate 13 and rotation of the blade 12 together with the support shaft 11 thereof. The geared motor 2 is attached to the upper side of the flange 3 where the flange 3 is enlarged, together with a cover 2a for covering the charging portion. A motor pulley 17 is mounted on the output shaft of the geared motor 2, and the motor pulley 17 and the upper part of the mounting plate 13 mounted on the support shaft 11 are connected by a connecting wire 18. The connecting wire 18 is the supporting leg 4
The pulley 2 is pivotally supported by the pulley support fitting 19 fixed to the
It is multiplied by 0 and the direction is changed by almost 90 °. The pulley support fitting 19 is fixed to a portion that crosses the diameter line of the support leg 4 and a portion that extends vertically downward from the central portion. A wire guard 21 is attached to the pulley supporting member 19 so as to prevent the connecting wire 18 hung coaxially with the pulley 20 from being loosened from the pulley 20 (which occurs when the blade is pulled outward by a hand or the like). ing. The rear end of the wire guard 21 contacts the end surface of the bearing 7 and is prevented from rotating.

The blade 12 that is the main body of the damper function that opens and closes the air passage
With regard to, as shown in FIG. 1, even if the packing material 22 is attached to the rim of the opening flange 6 and the edge of the blade 12 is brought into contact with this, the airtightness at the time of closing can be maintained.
If the whole of the opening flange 6 is inserted into the opening portion at the time of closing, the airtightness of the portion at the time of closing can be sufficiently maintained. In the figure, reference numeral 23 is a terminal block, and 24 is a microswitch.

The damper device having the above configuration is attached to an air supply duct or the like so as to interlock with a ventilation fan, for example. That is, when the ventilation fan is turned on, the damper device is also energized, the geared motor 2 rotates, and the motor pulley 17 rotates from point A to point B to wind up the connecting wire 18. Connecting wire 1
8, the support shaft 11 is pulled forward against the bias of the spring 15, and the blade 12 fixed to the end of the support shaft 11 is separated from the opening of the opening flange 6 in the direction of the center line. Is released. When the geared motor 2 rotates to the point B, NC of the micro switch 24
Then, an electric signal of 100V is output from the lamp, and the lamp indicating the open state is turned on. When the geared motor 2 rotates a little from the point B, the rotation of the geared motor 2 is stopped by the switch in the geared motor 2, but the coil in the geared motor 2 is continuously energized and the clutch of the geared motor 2 is kept in the engaged state. It Therefore, the blade 12 is also maintained in the open state. When the ventilation fan is turned off, the damper device is also turned off, the clutch is disengaged, and the support shaft 1 is supported by the urging force of the spring 15.
1 is pulled back, and the blade 12 abuts the opening to seal the opening. The motor pulley 17 also returns to the original state and becomes the initial state. Just before the blade 12 is closed, the spring 1
The force that counteracts the spring force of 5 is the blade 1 by the air cylinder.
2, the brake is applied to the closing motion of the blade 12, and the blade 12 is gently closed according to the speed at which the air escapes from the vent hole 10 of the cylinder 9 without making an impact sound.

In this damper device, since the blades 12 do not rotate but move linearly to open and close, there is no inconvenience that a gap is created in the closed state. Further, since there is no geared motor 2 for driving the blades 12 in the air passage and the driving force is transmitted to the support shaft 11 by the connecting wire 18, the pressure loss in the air passage is small and the power consumption is smaller than that by the rotary solenoid.

[Advantages of the Invention] As described above, in the damper device of the present invention, the support shaft supported by the drive motor provided outside the cylinder forming the air passage in the direction of the center line in the cylinder forming the air passage. By sliding through the connecting cord, the blade that closes the opening of the tubular body is separated from the opening in the direction of the center line by the urging force of the elastic member that urges the support shaft, and the opening is opened. The portion can be opened, and the opened blade can be closed by urging the elastic member. At the time of closing, the air end of the air cylinder is compressed by the shaft end portion so that the brake is applied and the blades are gently closed without impact noise, resulting in low pressure loss and relatively low power consumption.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a damper device according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a front view showing a structure of an opening portion of the flange, and FIG. It is an electric circuit diagram of a damper device. In the figure, 1
Is a cylindrical body, 2 is a geared motor, 4 is a supporting leg, 7 is a bearing,
Reference numeral 8 is a case, 9 is a cylinder, 10 is a vent hole, 11 is a support shaft, 12 is a blade, 15 is a spring, 18 is a connecting wire, and 20 is a pulley. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A bearing, which is held by a support leg at the center of an opening on one end side of a cylinder forming an air passage, is supported by the bearing, and is accommodated in the cylinder so as to be slidable in the direction of the center line. A support shaft, a blade fixed to one end of the support shaft to close the opening on the one end side of the tubular body, an elastic member for urging the support shaft in the direction in which the blade closes, and the elastic member and the support shaft. A tubular case that covers a portion inside the tubular body, a drive motor provided outside the air passage formed by the tubular body, a connecting line that connects the drive motor and the support shaft, and the connecting line is mounted. A damper provided with a pulley for changing the direction of the connecting rope, and provided with a cylinder with a vent hole which forms an air cylinder with the shaft end of the support shaft at the rear of the case. apparatus.