JPH0355059Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotation speed indicator for use as a control knob for general industrial machinery.

[Conventional technology]

This type of rotational speed indicator rotatably supports a weight pointing in the direction of gravity in a case, and a scale plate is fixed to the weight, and rotates with respect to the weight as the case rotates. It is common to have a pointer and a handle fixed to the case that is attached to the rotating shaft.

[Problem that the invention attempts to solve]

The above-mentioned weight-type rotational speed indicator has restrictions on the mounting direction, and it is necessary to tilt the entire device at approximately 60 degrees from the side so that the weight points in the direction of gravity, and it cannot be mounted vertically. Also, if you want to set any angle of the rotation axis to zero degrees, first remove the handle from the rotation axis, rotate the handle, and when the pointer points to zero on the scale, fix the handle to the rotation axis. There is. Therefore, the zero adjustment operation of the pointer was troublesome.

The present invention aims to eliminate the above defects.

[Means to solve problems]

In order to achieve the above object, the present invention provides a panel 36
a holder 4 that can be freely engaged with the holder 4 at a certain angle; an adjustment tube 7 that is provided with a magnet 6 and whose outer circumference is exposed to the outside and that is rotatably fitted into the holder 4; a fixing means that is detachably fixed to the holder 4; a cylindrical handle 2 that is rotatably fitted to the inner circumferential surface of the adjustment tube 7 and the holder 4 and that is fixable to a rotating shaft 38 that protrudes from the panel 36; , a reference body 14 provided with a magnet 18 and rotatably supported within the handle 2; a scale plate 16 fixed to the reference body 14; and a shaft body 10 fixed within the handle 2. , a pointer 32 attached to a gear 30 rotatably supported on the shaft 10, and a gear mechanism that transmits the rotational movement of the shaft 10 relative to the reference body 14 to the pointer 32 at a predetermined reduction ratio. It is what it is.

[Effect]

A rotating shaft 3 that allows the handle 2 to protrude from the panel 36
8 with fixing screws 11, and the holder 4 is engaged with the panel 36 so as not to rotate. At this time, the magnet 18 disposed on the reference body 14 faces the magnet 6 disposed on the adjustment tube 7, and the reference body 14 is oriented in a certain direction. When the adjustment tube 7 is rotated, the reference body 14 rotates due to the attractive force between the magnets 6 and 18 in conjunction with this rotation, and the scale plate 16 that is interlocked with the reference body 14 rotates relative to the pointer 32. The pointer 32 can be adjusted to 16 zero degrees. This zero degree adjustment can be performed with the handle 2 fixed to the rotating shaft 38. After the above zero degree adjustment is completed, the adjusting tube 7 is fixed to the holder 4 with the fixing screw 9. In the above situation,
When the handle 2 is rotated, this rotation is transmitted to the pointer 32 by a gear mechanism, and the amount of rotation from an arbitrarily set zero degree of the rotating shaft 38 fixed to the handle 2 is transmitted to the scale plate that interlocks with the reference body 14. 16 and the opposing pointer 32.

〔Example〕

The configuration of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

Reference numeral 2 denotes a cylindrical handle, into which a ring-shaped magnet holder 4 is rotatably fitted, and the holder 4 is locked to the handle 2 by a ring 5. A pin 34 is provided protruding from the holder 4. Reference numeral 7 denotes an adjustment tube rotatably fitted to the outer peripheral surface of the handle 2, and the lower outer peripheral surface of the adjustment tube 7 is partially rotatably fitted to the upper inner peripheral surface of the holder 4. . A screw hole is provided in the holder 4, and the tip of a fixing screw 9 that is screwed into the screw hole faces the outer peripheral surface of the adjustment tube 7. A rare earth high performance magnet 6 is attached to the upper part of the adjustment tube 7 by adhesive. A screw hole is provided in the lower part of the handle 2, and a fixing screw 11 is screwed into the screw hole. A transparent cover plate 8 made of a glass plate is fitted into the upper part of the handle 2 and positioned by a ring. 1
0 is a shaft fixed to the partition wall of the handle 2 with a nut, and a reference body 14 is rotatably fitted to the outer circumferential surface of the large diameter portion of the shaft through a ball bearing 12. A scale plate 16 is fixed to the reference body 14 by a mounting shaft (not shown). A rare earth high performance magnet 6 is fixed to the reference body 14 at an eccentric position opposite to the magnet 6 by adhesive. Reference numeral 20 denotes a shaft body erected on the reference body 14, and a two-stage gear having a large diameter gear 22 and a small diameter gear 24 formed thereon is rotatably fitted into the shaft body.
The large diameter gear 22 meshes with a small gear 26 fixed to the small diameter portion of the shaft body 10. The small gear 24 meshes with a large diameter gear 30 that is rotatably fitted into the small diameter portion of the shaft body 10 via a pipe 28. The pipe 28 is fitted and fixed to the inner diameter portion of the large-diameter gear 30, and a pointer 32 is attached to the tip of the pipe 28. The pointer 32 faces the scale of the scale plate 16. Said gear 2
6, 22, 24, and 30 constitute a speed reduction mechanism. Incidentally, the magnets 6 and 18 may be covered with iron plates.

In the above configuration, the recessed part of the handle 2 is inserted into the rotating shaft 38 such as a knob protruding from the panel 36, and the fixing screw 11 is screwed in to fix the handle 2 to the rotating shaft 38. A pin 34 is inserted into the hole to lock the holder 4 in place on the panel 36. In this state,
The magnet 18 faces the magnet 6 at the shortest distance due to the attractive magnetic force acting between them, and the reference body 14 is oriented in a certain direction. When you turn handle 2,
A small gear 26 rotates in conjunction with the handle 2. The rotation of the small gear 26 causes the large diameter gear 22 to rotate,
The rotation is transmitted to the pointer 32 via the small gear 24, the large diameter gear 30, and the pipe 28, and the pointer 32
The amount of rotation of the handle 2 is displayed through interaction with the scale plate 16. When it is desired to change the zero degree of the rotating shaft 38, the fixing screw 9 is loosened and the adjusting tube 7 is rotated relative to the handle 2. In conjunction with the rotation of the adjustment tube 7, the attraction between the magnets 6 and 18 causes the reference body to
4 rotates, and the scale plate 16 rotates relative to the pointer 32. When the pointer 32 points to zero degrees on the scale plate 16, the adjustment tube 7 stops rotating, and the adjustment tube 7 is fixed to the holder 4 with the fixing screw 9. As a result, the angle of the rotating shaft 38 is set to zero degrees.

〔effect〕

As mentioned above, in this invention, the reference body is oriented in a certain direction by magnetic force, and the amount of rotation of the rotating shaft is measured using this reference body as a reference, so even if the rotating axis is perpendicular, the rotation There is an effect that the amount of rotation of the shaft can be measured, and the zero degree of the rotation shaft can be easily adjusted without removing the handle from the rotation shaft.

[Brief explanation of drawings]

The figure shows one preferred embodiment of the present invention.
The figure is a sectional view, and FIG. 2 is a plan view. 2...Handle, 4...Holder, 6, 18...
...Magnet, 7...Adjustment tube, 8...Transparent plate, 10,2
0... Shaft body, 9, 11... Fixing screw, 12... Ball bearing, 16... Scale plate, 22, 30...
...Large diameter gear, 24, 26...Small diameter gear, 32...
Pointer, 34...pin, 36...panel, 38...
Axis of rotation.

Claims (1)

[Scope of utility model registration request] A holder 4 that can be freely engaged with the panel 36 at a certain angle, an adjustment tube 7 that is provided with a magnet 6 and whose outer periphery is exposed to the outside and that is rotatably fitted into the holder 4, and the adjustment tube 7. a fixing means for removably fixing the panel 3 to the holder 4;
A cylindrical handle 2 that can be fixed to a rotating shaft 38 protruding from the handle 2 and a magnet 18 are provided.
A reference body 14 rotatably supported within the handle, a scale plate 16 fixed to the reference body 14, a shaft 10 fixed within the handle 2, and a scale plate 16 rotatably supported by the shaft 10. A pointer 32 is attached to a gear 30, and the shaft body 1 is connected to the pointer 32 at a predetermined reduction ratio.
and a gear mechanism that transmits rotational motion relative to the reference body 14 of 0.