JPH025371Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device designed to facilitate attachment/detachment, inspection and adjustment of gears, etc. in a storage box in which a position detector for detecting the moving position of a moving member is housed.

When using a position detector such as a limit switch or potentiometer to detect the movement position of various moving parts, when the moving amount of the moving member is very small or when high-precision position detection is desired, some method is used. It is necessary to magnify the movement of the moving member and transmit it to the position detector. For this purpose, it is possible to connect the moving member and the position detector via a link device, gears, etc., and to transmit the movement of the moving member magnified by the link device, gears, etc. to the position detector. This is commonly done. When using gears, the most preferable magnification ratio can be set by appropriately selecting the ratio of the number of teeth between the small gear attached to the position detector and the large gear that meshes with this small gear. If the pinion can be replaced with a small gear, it may be possible to apply it to any moving member.

By the way, if the position detector must be installed in a place where weather conditions fluctuate rapidly, such as outdoors, it is necessary to assemble the link device, gears, etc. in addition to the position detector in a sealed storage box. It is necessary to protect them from wind, rain, dust, and sudden temperature changes. Conventionally, most of the position detectors that were built into storage boxes along with gears simply had a top lid such as a cover attached in a removable manner. It was extremely troublesome and difficult to do so.

SUMMARY OF THE INVENTION In view of the above-mentioned problems with conventional position detector storage devices, it is an object of the present invention to provide a device that can easily and quickly disassemble the storage box and replace gears and the like.

The structure of the position detector storage device of the present invention that achieves this purpose includes a storage box in which a frame-shaped bracket is integrally formed inside and a top lid is detachably attached, and a storage box that is detachably attached to the bracket. A supporting plate is connected to the moving member and has a position detector attached thereto for detecting the moving position of the moving member; a rotating shaft connected to the member; and a large size removably fitted and fixed to the rotating shaft rotatably supported by the storage box and the support plate, and meshing with a small gear attached to the position detector. It consists of gears.

Hereinafter, an embodiment in which a position detector storage device according to the present invention is applied to a potentiometer for detecting the opening degree of a guide vane of a cross-flow water turbine will be described in detail with reference to FIGS. 1 to 3. As shown in FIG. 1 showing a schematic structure of this embodiment and FIG. 2 showing an enlarged view of its main parts, a frame-shaped bracket 12 is installed inside a storage box 11 installed outdoors.
The bracket 12 is formed with a plurality of bolt through holes 13. Further, a top lid 14 for sealing and protecting the inside of the storage box 11 is removably attached to the top of the storage box 11 via a fastener (not shown). The bolt through hole 13 has an elongated hole shape, and the support plate 16 on which a plurality of stud bolts 15 that are passed through the bolt through hole 13 are implanted is attached to the bracket 12 by a nut 17 that is screwed into the stud bolt 15. It is fixed in a removable manner. Note that ordinary bolts may be used instead of the stud bolts 15, and bolt through holes may be formed in the support plate 16 to connect the bracket 12 and the support plate 16. In other words, a fastener may be used to connect the bracket 12 and the support plate 16. It would be good if both could be fixed. A potentiometer 18 for detecting the opening degree of a guide vane of a cross-flow water turbine (not shown) is attached to this support plate 16, and is further pinned to a connecting rod (not shown) that swings together with the swing shaft of the guide vane. The other end of a rotating shaft 20 to which a rotating arm 19 is fixed is removably fitted to the support plate 16. As shown in FIG. 3, which shows the vertical cross-sectional structure of FIG.
A small gear 2 attached to a potentiometer 18 is attached to the rotating shaft 20, which is rotatably supported by a potentiometer 18.
A large gear 22 that meshes with the rotary shaft 20 is removably fixed via a set screw 23, so that the movement of the guide vane is controlled by the rotating arm 19 from the large gear 22 integrated with the rotating shaft 20 to the potentiometer 18. This is transmitted to the small gear 21, and the potentiometer 18 automatically detects the opening degree of the guide vane at this time. In addition, when performing high-precision detection, it is desirable to incorporate a backlash prevention device between the small gear 21 and the large gear 22, and it is also possible to add a limit switch for calibration and to improve reliability. . In this case, the pinion attached to the limit switch and potentiometer 1
By connecting the small gear 21 of No. 8 with a tension spring, it is possible to eliminate backlash with the large gear 22 at the same time.

Therefore, when replacing the small gear 21 and the large gear 22, first remove the top cover 14 from the storage box 11, loosen the nut 17, and remove the stud 15 of the support plate 16 from the bolt through hole 13. The support plate 16 and the potentiometer 18 are taken out from the storage box 11. This allows the rotating shaft 20 to
6, the large gear 22 can be removed from the rotating shaft 20 by loosening the set screw 23.
Since the bolt through hole 13 provided in the bracket 12 has a diameter sufficiently larger than the diameter of the stud bolt 15, the entire support plate 16 can be moved somewhat relative to the bracket 12, and the meshing between the small gear 21 and the large gear 22 is prevented. It is possible to appropriately find the adjustment and support position of the rotating shaft 20. Note that the assembly work may be performed in the reverse order of the disassembly work described above. Furthermore, in this embodiment, the guide vane of a cross-flow water turbine was used as an example of the movable member, but it goes without saying that the present invention can also be applied to items that move linearly in a reciprocating manner, and in this case, linear motion is converted into rotational motion. It is necessary to incorporate a mechanism to

As described above, according to the position detector storage device of the present invention, the support plate on which the position detector is attached is removably connected to the frame-shaped bracket formed in the storage box, and one end of the rotating shaft is connected to this frame-shaped bracket. Since the gear is rotatably fitted to the support plate, the gear can be replaced and inspected and maintained very quickly and easily.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of an embodiment of the position detector storage device according to the present invention, Fig. 2 is an enlarged view of its main part, and Fig. 3 is a view of Fig. 2 along the rotation axis. It is a vertical cross-sectional view, and the reference numeral 11 in the figure is a storage box;
12 is a bracket, 14 is a top cover, 16 is a support plate,
18 is a potentiometer, 20 is a rotating shaft, 21 is a small gear, and 22 is a large gear.

Claims (1)

[Scope of utility model registration request] A storage box having a frame-shaped bracket integrally formed therein and a top lid removably attached thereto, and a support that is removably connected to the bracket and is equipped with a position detector for detecting the moving position of a movable member. a rotating shaft whose one end is removably fitted and supported by the support plate and whose other end protrudes outside the storage box and is connected to the moving member; and the storage box and the support plate. A storage device for a position detector, which comprises a large gear that is removably fitted and fixed to a freely supported rotating shaft and meshes with a small gear attached to the position detector.