JPH086261Y2 - Intermittent rotation type shaft encoder measurement start angle setting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a structure of an opening meter for measuring the opening / closing degree of a dam gate, a flow rate adjusting valve, etc., and an intermittent rotation type shaft encoder built in the opening meter. Relates to a structure for setting a measurement starting angle of

(Prior Art) Conventionally, in this type of device, as shown in FIG. 3 as an example of a configuration, an opening gauge input shaft 1, a gear 2, a gear 3, a mounting substrate 4, a speed increasing mechanism 5, a speed increasing mechanism. The input shaft 6 and the shaft encoder 7 are configured to receive the opening / closing movement amount of a dam gate or the like as a proportional rotation amount by the opening degree input shaft 1, the gear 2 and the gear 3
And is transmitted to the shaft encoder 7 and the measured value is converted into an electric signal and transmitted.

For the shaft encoder used in this opening degree meter, a reed switch type shaft encoder 7 is often used in an intermittent rotation mechanism to which a magnet is applied for economical reasons in terms of signal transmission.

However, this opening gauge is connected to the output shaft (not shown) of the dam gate hoisting mechanism, for example, by connecting the display of the shaft encoder 7 to 000 when the dam gate is fully closed to raise the dam gate. When it is lowered and returned to the fully closed position, the shaft encoder 7 does not return to 000 due to the backlash of the gears of the gate hoisting mechanism, and for example, 001 may be displayed as shown in the figure. Many.

After opening and closing the dam gate, the adjustment work to display 000 accurately at the time of full closing is performed by loosening the set screws 2a and 2b and setting the gear 2 to the opening meter input shaft 1 in the example shown in FIG. Or the fixed pawls 7a, 7b, 7c.
Is performed by turning the shaft encoder 7 by hand with respect to the speed increasing mechanism 5, and while keeping the display state of 000, the shaft encoder input shaft 8 is set to a slightly minus side from 0, that is,
Since the setting is performed by turning to a limited angle for one step of intermittent rotation, it is easy to set an arbitrary angle in the intermittent rotation mechanism which has the property that the numerical value is switched instantaneously as the torque increases when the operator manually adjusts the adjustment. There was an inconvenience that I could not do it.

(Problems to be solved by the invention) The present invention has been made to solve this problem. It is easy to set the rotation start angle of the shaft encoder input shaft during operation adjustment after installing the opening meter on site. An object of the present invention is to provide a measurement starting angle setting mechanism that can be set.

(Means for Solving the Problems) The present invention is mounted on a gear that has the same axis as the axis of a predetermined rotation transmission shaft portion of a rotation transmission mechanism from an input shaft to an intermittent rotation type shaft encoder, and operates a knob. And a fine movement dial mechanism in which an output shaft cooperating with the fine movement rotation of the fine movement scale plate is connected to the shaft of the rotation transmission shaft portion, and the rotation of the fine movement scale plate of the fine movement dial mechanism cooperates with the rotation of the gear. And a fixing means for enabling the rotation start angle of the intermittent rotation type shaft encoder to be easily operated by releasing the fixation of the fine movement scale plate to the gear by the fixing means and rotating the knob of the fine movement dial mechanism. It is characterized in that it can be set to.

(Embodiment) An embodiment of the intermittent rotation type shaft encoder measurement starting angle setting mechanism according to the present invention will be described in detail below with reference to the accompanying drawings.

1 and 2 are a plan view and a front view showing a partially broken state of an intermittent rotation type shaft encoder measurement angle setting mechanism according to the present invention, which is the same as the member shown in the conventional example shown in FIG. The members having the same structure are designated by the same reference numerals, and detailed description thereof will be omitted. That is, in the present invention shown in FIGS. 1 and 2, the structure is such that the opening meter input shaft 1, the gear 2,
Gear 11 fitted and fixed to adapter 12, fine movement dial mechanism
13, knob 14, output shaft 15, fine-motion scale plate 16 that rotates in the same direction as output shaft 15, fixing bracket that is fastened to the fine-motion scale plate and rotates in the same direction
17, scale plate fixing screw 18, fine adjustment dial mounting screw 13a, 13b,
13c, 13d, mounting board 4, speed increasing mechanism 5, and speed increasing mechanism input shaft 19 for tightening the fitted output shaft with set screws 19a, 19b and slidingly fitted to the adapter 12, and a shaft encoder 7. .

In the above structure, the setting operation of the rotation start angle with respect to the shaft encoder input shaft 8 is performed by fixing the scale plate attached to the fine movement dial mechanism 13 in the setting mechanism connected with no load while displaying 001 when the dam gate is fully closed. Loosen the screw 18 to release the coupling between the adapter 12 and the fine movement scale plate 16, and turn the knob 14 to rotate the fine movement scale plate 16 to the position of the predetermined scale assumed for backlash of the gear of the gate hoisting mechanism. As a result, the rotation start angle of the shaft encoder input shaft 8 can be easily set to 000. In addition, the fine adjustment scale plate 16 and the output shaft 15 for the knob 14
The reduction ratio of is, for example, 1/10. After setting the rotation start angle, tighten the scale plate fixing screw 18 to the adapter 12, and the fine movement scale plate 16 will be fixed to the adapter 12, and the rotation of the opening meter input shaft 1 will be the gear 2, the gear 11, the adapter 12, the fine movement. Dial mechanism 13
Via (the adapter 12 and the fine-motion dial mechanism 13
It is transmitted to the speed increasing mechanism input 19.

(Effects of the Invention) As described above, according to the present invention, when the opening meter is operated, the setting operation of the measurement starting angle of the input shaft of the intermittent rotation type shaft encoder can be performed by adjusting the fine adjustment dial. This is extremely easy, and the starting angle can be set accurately.

[Brief description of drawings]

1 and 2 are a plan view and a front view showing an embodiment of an intermittent rotation type shaft encoder measurement starting angle setting mechanism according to the present invention in a partially broken state, and FIG. 3 is a conventional opening meter. FIG. 6 is a plan view showing an example of the transmission mechanism of FIG. 1 …… Opening gauge input shaft 2,3,11 …… Gear, 2a, 2b ……
Set screw, 4 ... Mounting board, 5 ... Speed increasing mechanism, 6 ... Speed increasing mechanism input shaft, 7 ... Shaft encoder, 7a, 7b, 7c.
Fixed pawl, 8 …… Shaft encoder input shaft, 12 …… Adapter, 13 …… Fine adjustment dial mechanism, 13a, 13b, 13c, 13d…
… Fine movement dial mounting screw, 14 …… Knob, 15 …… Output shaft, 16 …… Fine adjustment dial, 17 …… Fixing bracket, 18 …… Scale plate fixing screw, 19 …… Increasing mechanism input shaft, 19a, 19b ...... Set screw.

Claims (2)

[Scope of utility model registration request] 1. A fine movement scale plate is mounted on a gear having the same axis as the axis of a predetermined rotation transmission shaft portion of a rotation transmission mechanism from an input shaft to an intermittent rotation type shaft encoder, and is used for fine movement rotation of a fine movement scale plate by operating a knob. A cooperating output shaft is provided with a fine movement dial mechanism connected to the shaft of the rotation transmitting shaft portion, and a fixing means for cooperating the rotation of the fine movement scale plate of the fine movement dial mechanism with the rotation of the gear. The rotation start angle of the intermittent rotation type shaft encoder can be easily set by releasing the fixation of the fine movement scale plate to the gear by the fixing means and rotating the knob of the fine movement dial mechanism. Intermittent rotation type shaft encoder measurement start angle setting mechanism. 2. The intermittent rotation type shaft encoder measurement starting angle setting mechanism according to claim 1, wherein the predetermined rotation transmitting shaft portion is an input shaft of a speed increasing mechanism connected to the shaft encoder.