JP4226190B2 - Lid opening / closing drive device - Google Patents

Description

[0001]
[Field of the Invention]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid opening / closing driving device for closing an opening formed in various structures, and more particularly to a driving device for opening / closing a lid plate heavy object attached to a stirring tank or a pressure vessel of a large stirrer. .
[0002]
[Prior art]
It is necessary to frequently open and close the lid of the raw material charging port attached to this kind of agitation tank or pressure vessel according to its use. For example, in the case of a pressure vessel, the lid is thick in terms of pressure resistance. Therefore, there is a demand for a lid opening / closing device that does not rely on human power or reduces human power for speeding up operations.
For this purpose, a balancer that uses a spring mechanism to open and close the lid has been attached to the lid to reduce the opening and closing operation. Also, a counterweight system or a suspension is used for opening and closing the flange cover of the pressure vessel. A davit-type opening / closing mechanism has been developed that lifts the entire lid by forming a piece.
[0003]
[Problems to be solved by the invention]
The lid open / close balancer using the above-described spring mechanism is excellent in operability, but can only be used for lightweight products due to restrictions on the spring reaction force, and has a problem of sag and deterioration of the spring itself. There was inconvenience such as exchange. The counterweight type or davit type is unsatisfactory in terms of operability. In general, in conventional agitation tanks and pressure vessels, although it is necessary to add a lid opening / closing device, no countermeasures are actually taken. Yes.
[0004]
The present invention has been made to solve the above-described conventional problems, and is not limited by the weight of the lid, is excellent in operability, and is not affected by the installation environment. It is to provide a driving device.
[0005]
[Means for Solving the Problems]
According to the present invention, in a lid opening / closing drive device that is connected to a driven shaft extending laterally with respect to the opening at a side position of the opening of the structure, the lid opening / closing driving device is installed on the structure fixing side. An air motor and a speed reducer coupled to the air motor, wherein the driven shaft is fixed to each of a pair of brackets provided on the lid , and the speed reducer is connected to a side of the structure. Provided is a lid opening / closing drive device that is mounted on an overhanging pedestal and that is disposed so as to be sandwiched between the pair of brackets, and in which the output shaft of the speed reducer is coupled to the driven shaft of the lid body Is done.
Further, the present invention can employ a configuration in which the speed reducer is an orthogonal speed reducer having an input shaft protruding in a direction perpendicular to the output shaft, and is connected to an air motor via the input shaft.
Further, the present invention can adopt a configuration in which the driven shaft is configured in a cylindrical shape, the output shaft of the reduction gear is inserted into the driven shaft, and the driven shaft and the output shaft are coupled by a keying means.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a top view of a lid opening / closing drive device according to one embodiment of the present invention, and FIG. 2 is a front view of FIG. In addition, this Example is an example applied to the cover body of the upper opening of the stirring tank of a vertical stirrer. The upper part of the stirring tank 1 partially showing only the upper part is opened for supplying the liquid to be treated, cleaning and checking the inside of the tank, and the opening 2 closes the lid of the stirring tank 1 during the stirring operation. The lid 3 is mounted in a sealed state. A pair of brackets 6 are attached to one side peripheral portion of the lid 3, and a driven shaft 7 described later is fixed to the bracket 6.
[0007]
As shown in FIG. 1, an orthogonal speed reducer 8 is mounted on a cradle 5 protruding from the side of the stirring tank 1 so as to be sandwiched between a pair of brackets 6. The speed reducer 8 has an output shaft 9 projecting from the speed reducer main body to both sides, and an input shaft 10 (shown in FIG. 3) outward from the speed reducer main body in a direction orthogonal to the output shaft 9. And a unit output shaft 26 of the air motor unit 11 described later is connected to the shaft end of the input shaft 10 (FIG. 3). The output shaft 9 of the speed reducer 8 is coupled to a driven shaft 7 fixed to the bracket 6 of the lid 3 by means such as keying.
[0008]
FIG. 3 is a longitudinal sectional view of the air motor unit in the embodiment of FIG. The air motor 16 is fixed to the end of the unit housing 17, and a pinion 19 is formed on the motor output shaft 18. A transmission shaft 20 is pivotally supported in the unit housing 17 at the tip of the air motor 16. The transmission shaft 20 has an internal gear 21 fixed to one end and a bevel gear 22 fixed to the other end. The internal gear 21 meshes with the pinion 19 of the air motor 16, and the transmission shaft 20 is rotationally driven by the urging of the air motor 16. Further ahead of the transmission shaft 20, a cylindrical unit output shaft 26 having an axis perpendicular to the transmission shaft is supported by the unit housing 17. An output shaft side bevel gear 23 that meshes with the transmission shaft side bevel gear 22 is fixed to the outer peripheral portion of the unit output shaft 26 in the housing 17, so that the rotation of the air motor 16 is engaged with the pinion 19 and the internal gear 21 and both bevel gears. It is transmitted to the unit output shaft 26 through the meshing of 22 and 23. These gear groups have a speed reduction function as well as a rotation transmission function of the air motor 16, and when combined with the speed reduction function of the speed reducer 8, a large output torque is brought to the speed reducer output shaft 9 using the air motor 16 as a drive source. The unit housing 17 is connected to the speed reducer 8 by bolt fastening means 25.
[0009]
An air supply pipe attached to the air motor 16 of the air motor unit 11 is connected to an air supply source (not shown) via an open / close control valve (not shown), and the air motor 16 is driven to rotate forward and backward by operating the open / close control valve. And a stop is made. When the air motor 16 is driven to rotate forward, for example, the output shaft 9 of the speed reducer 8, and thus the driven shaft 7 rotates in the lid opening direction, and the lid 3 fixed to the driven shaft 7 is indicated by a broken line in FIG. The opening 2 is opened by rotating around the driven shaft 7 to a predetermined angle α. When the air motor 16 is reversely driven from this state, the lid 3 is rotated back to the position indicated by the solid line in FIG. 2 and the opening 2 is closed.
[0010]
In the above-described embodiment, the supply of the liquid to be treated to the stirring tank 1 is not limited to the form in which the lid 3 is opened and the liquid is supplied from the upper opening of the tank 1. You may connect a hose and supply the said to-be-processed liquid in a tank through this. Further, the air supply pipe connected to the air motor 16 may be constituted by a flexible hose or the like so as not to interfere with the surrounding work, and is particularly suitable for supplying the liquid to be treated from the central hole of the lid 3. Therefore, the frequency of opening the lid 3 is relatively low. In such a case, the flexible hose is not permanently installed, and the hose is removed during the steady operation of the agitation tank 1 and connected to the air motor 16 when necessary. May be opened. Of course, the air motor unit 11 and the speed reducer 8 are appropriately selected in capacity and speed increase / decrease ratio according to the weight of the lid 3 to be applied.
[0011]
In the above embodiment, the output shaft 9 of the speed reducer 8 is orthogonal to the input shaft 10, and the speed reducer 8 is disposed between the pair of brackets 6 extended from the lid 3. ing. FIG. 4 shows a reference example of a lid opening / closing drive device, using a reduction gear whose input / output shaft is on the same axis, and arranging the reduction gear on the axis of the driven shaft fixed to the bracket. The speed reducer 12 and the air motor unit 11 are placed on a suitable base 13 separate from the stirring tank. Both ends of the driven shaft 7 fixed to the bracket 6 of the lid 3 are pivotally supported by bearings 15 supported on the gantry 13, and the driven shaft 7 and the air motor unit 11 are connected to one end of the driven shaft 7 by the speed reducer 12 and the air motor unit 11. Therefore, the lid 3 may be opened and closed.
[0012]
The lid to be applied is not limited to the lid of the agitation tank, but can be applied to open / close lids of openings such as pressure vessels and other various mechanical structures, outdoor and indoor stationary structures, and the like. Furthermore, by combining with a quick opening mechanism such as a clutch door, higher operability and labor saving are possible.
[0013]
【The invention's effect】
As described above, according to the present invention, a lid for a heavy object can be opened and closed simply by operating a control valve provided in an air supply pipe for driving an air motor. Even if the lid is large, an air motor and a speed reducer that can cope with the lid can be easily obtained, and can be applied to any lid without weight limitation. The air motor does not require a large hydraulic circuit and hydraulic equipment in the hydraulic motor, the apparatus itself is simple, and can be easily attached by adding a slight modification work to existing equipment. In addition to being excellent in operability, there is an effect that there is no restriction on the use in an explosion-proof area such as a chemical plant because an electric device such as an electric motor is not used in the drive unit.
[Brief description of the drawings]
FIG. 1 is a top view of a lid opening / closing drive device according to an embodiment of the present invention.
FIG. 2 is a front view of FIG.
3 is a longitudinal sectional view of an air motor unit in the embodiment of FIG.
FIG. 4 is a top view showing a reference example of a lid opening / closing drive device ;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stirring tank 2 Opening part 3 Lid body 6 Bracket 7 Driven shaft 8,12 Reduction gear 9 Reduction gear output shaft 10 Reduction gear input shaft 11 Air motor unit 16 Air motor

Claims (3)

In a lid opening / closing drive device that is connected to a driven shaft extending laterally with respect to the opening at a lateral position of the opening of the structure,
An air motor installed on the fixed structure side, and a speed reducer connected to the air motor,
The driven shaft is fixed to each of a pair of brackets provided on the lid,
The speed reducer is mounted on a pedestal extending from the side of the structure, and is disposed so as to be sandwiched between the pair of brackets, and the output shaft of the speed reducer is the driven shaft of the lid A lid opening / closing drive device characterized by being coupled to the lid. 2. The lid opening / closing drive device according to claim 1, wherein the speed reducer is an orthogonal speed reducer having an input shaft protruding in a direction orthogonal to the output shaft, and is connected to an air motor via the input shaft. . The lid according to claim 1 or 2, wherein the driven shaft is formed in a cylindrical shape, and the output shaft of the speed reducer enters the driven shaft, and the driven shaft and the output shaft are coupled by a keying means. Drive device.

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