JPS6024408A - Detector for moved amount - Google Patents

Abstract

PURPOSE:To make it possible to detect the moved amount precisely within the size of a conventional apparatus, by rotating a specified disk by the rotation of an input shaft in proportion to the moved amount, and converting the moved amount into rotary motion, thereby performing the detection. CONSTITUTION:A rotary disk 6 is fixed to the upper part of a fixed shaft 5 at the center of a container body 11. Rotary cams 72 and 73 are rotatably supported by a moving shaft 7 of the disk 6. The cams are provided so as to contact with a limit switch 8 at the periphery. A gear 51 of the fixed shaft 5 is intermeshed with a gear 41 of a shaft 4. A gear 52 is intermeshed with a gear 71 of the moving gear 7. When an input shaft 2 is rotated, the speed in reduced through the gear train and the fixed shaft 5 is rotated. At this time, e.g., one stroke of the full opening and full closing of a water gate is reduced into less than one rotation of the shaft 5. The cams 72 and 73 are contacted with the switch 8, and the desired moved amount is detected. Since the moved amount is converted into the rotary motion, the precise detection can be performed.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a displacement detector, for example, a cap L for a dam or a river water gate.
The present invention relates to a movement amount detector for detecting a predetermined movement amount when the movement amount needs to be controlled, such as when moving a movable part of a crane.

[Background technology]

The displacement 11Ilt11 detector is attached to various devices other than water gates and cranes, but in this case, the displacement of -3111
This will be explained using an example of a water gate such as a dam, which must be carried out. Sluice gates installed in dams are opened and closed during power generation or when the water storage area is curved.

The water gate is opened 111 by moving the water gate up and down using hydraulic pressure, or by suspending the water gate with a wire or the like and winding up the wire with a winding machine or the like. The opening and closing status of the flood gates must be changed to several stages, such as full, fully open, and paused.
In order to perform II, it is necessary to detect the amount of ill flow in the water gate. Detecting the amount of movement of this floodgate is very difficult.
151! Therefore, for example, if the water gate remains at the bottom level even after it is fully open, or if it moves further upwards from the fully open or resting state, there is a risk that the outflow port itself where the water gate is installed may be damaged. Also, if you do not adjust the opening/closing status of the sluice gate, you will not be able to adjust the flow rate of the water flowing out, which will result in a waste of heavy resources, so it is necessary to know the amount of movement of the sluice gate. Ta. Conventionally, the amount of movement of a water gate has been detected using a detector as shown in FIGS. 1 and 2, for example. FIG. 1 is a top view of a conventional movement amount detector 100, and FIG. 2 is a partially sectional side view. Movement I
The i-detector 100 includes a box 101 that forms the outside of the device, an input shaft 102 that is rotatably provided in the longitudinal direction of the box 101, a piece 103 that engages with the input shaft 102, and a It consists of limit switches 104 and 105 which are movably mounted on the bottom.

For example, the rotational force of a hoist that opens and closes the water gate is manually applied to the input shaft 102 in conjunction with the movement of the water gate.
It's becoming a sea urchin. A spiral groove is formed on the outer circumference of the input shaft 102, and a piece 10. T is engaged. Therefore, when the input shaft 102 rotates, the piece 103 moves horizontally on the input shaft 102.

The piece 103 is movable from one end of the input shaft 102 to the other end. The rotational force of the hoist that is input to the human power shaft 102 is decelerated by interposing a float or the like between the input shaft 102 and the Keijo, and the movement of the piece 103 is set to synchronize with the movement of the water gate. There is. In other words, when the rotational force of the hoisting machine required to raise the water gate from fully closed to fully open (pause) is input to the input shaft 102, the piece 103
It is set to move from one end of 2 to the other end. Therefore, when the piece 103 is located at one end, the water gate is fully open, and when the piece 103 is located at the other end, the water gate is fully open (at rest).

The limit switches 104 and 105 are also provided with movable parts 106 and 107 that actuate the limit switches when they come into contact with the piece 103 and are pressed.

By adjusting the positions of these limit switches 104 and 105, the amount of movement of the water gate can be detected. For example, limit switch 104/10
5 near the end of the input shaft 102, the flood gate is fully opened when the piece 103 moves to one end and hits the movable part 106, activating the limit switch 104, and the piece 103 moves to the other end. When the movable part 107 and the hit limit switch 105 are activated at the same time. In this manner, the conventional movement amount detector 100 detects the movement amount of the water gate by replacing the movement amount of the water gate with the movement amount of the piece 103 moving on the input shaft 102.

In order to accurately measure the amount of water gate movement using this conventional device,
Although the length of the input shaft 102 may be increased, the input shaft 102
There is a natural limit to the length of the movement, and accurate detection of the amount of movement cannot be expected. In addition, in order to detect the intermediate point between fully closed and fully opened water gates, the position of limit switch 104 or 105 is changed, and this adjustment is performed by changing the position of limit switch 104 or 105.
4 and 105, the limit switches 104 and 105 must be adjusted using bolts 108 and 109 that are connected to the bottom of the box body 101, and the hands, etc. must be It was very troublesome as it had to be inserted inside the 101 to work.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned conventional circumstances, and includes:
It is an object of the present invention to provide a movement amount detector that can perform more precise detection within the same dimensions as conventional ones, and that also allows the device to be easily adjusted.

[Structure of the invention]

The present invention achieves the above object by converting the amount of movement into rotational motion and detecting it.

(Example) The present invention will be explained below with reference to the illustrated embodiments.

FIG. 3 is a top view of the movement amount detector 10 which is an embodiment of the present invention, and FIG. 4 is a sectional view taken along the line IV--IV in FIG. The movement amount detector 10 includes a detection mechanism inside a container 1 having a hollow box shape as a whole. The container 1 consists of a container body 11 and a cover 12 that is removably attached to the top of the container body 11, and the interior can be adjusted by removing the cover 12. An input shaft 2 is rotatably attached to one side of the container body 11 substantially perpendicular to the side. One end of the input shaft 2 is connected to the container body 11
The container body 11 protrudes outside, and the other portion is inserted into the container body 11. A bevel gear 21 is fixed to the other end of the input shaft 2, and the intermediate portion is rotatably supported by a bearing 22. The bearing 22 is supported by a bearing stand 23 fixed to a substrate 13 provided at the bottom of the container body 11.

Further, a transmission shaft 3 is provided close to the bevel gear 21 of the input shaft 2. The transmission shaft 3 is provided perpendicularly to the input shaft 2, and its base end is rotatably attached to a substrate 13, and its distal end is rotatably attached to a fixed plate 14 provided above the container body 11 in parallel to the substrate 13. freely supported. A bevel gear 31 that meshes with the bevel gear 21 of the input shaft 2 is fixed to an intermediate portion of the transmission shaft 3 so that the rotation of the input shaft 2 is transmitted to the transmission shaft 3.

Further, a gear 32 is fixed to the distal end of the transmission shaft 3, and a gear 33 is fixed near the base end. Further, a shaft 4 is rotatably fixed to the fixed plate 14 in parallel with the transmission shaft 3. A gear 41 is fixed to the tip of the shaft 4 above the fixed plate 14. A gear 42 that meshes with the gear 32 of the transmission shaft 3 is fixed to the lower part of the gear 4'1, so that the rotation of the transmission shaft 3 is transmitted to the gear 41 via the gears 32 and 42.

These gears 41 and 42 constitute the transmission l1lII41 of the present invention. Furthermore, in the center part of the container body 11, there is a plate 13.
A fixed shaft 5 is provided perpendicularly to. The fixed shaft 5 has its end rotatably fixed to the base 11ii13, and its intermediate portion rotatably supported by the fixed plate 14. A gear 51 that meshes with the gear 41 of the shaft 4 is rotatably fixed on the distal end side of the fixed shaft 5, that is, above the fixed plate 14. This gear 51 includes a gear 52 larger than the gear 51.
is fixed. Further, a rotating disk 6 having a large diameter is fixed to the tip of the fixed shaft 5 so as to rotate together with the fixed shaft 5. The rotating disk 6 is held between a mounting portion 53 fixed to the fixed shaft 5, and is configured such that the rotating disk 6 can be rotated relative to the mounting portion 53 by screwing the groove portion 53. There is. That is, the rotary disk 6 is configured to rotate together with the fixed shaft 5, but the rotary disk 6 can also rotate relative to the fixed shaft 5 by adjusting the screw of the mounting portion 53. Further, a gear 54 is fixed below the fixed plate 14 of the fixed shaft 5. The gear 54 is configured to interlock with the gear 33 of the transmission shaft 3, and the rotational force of the transmission shaft 3 is transmitted to the gear 54 through a plurality of gears (not shown) between the gear 54 and the gear 33. transmission shaft 3.
The rotating force is transmitted to the fixed shaft 5. Further, near the end of the rotating disk 6, an intermediate portion of a moving shaft 7 is rotatably fixed perpendicularly to the rotating disk 6. A gear 71 that meshes with a gear 52 rotatably fixed to the fixed shaft 5 is fixed to the lower end of the moving shaft 7 . Disk-shaped multi-rotation cams 72 and 73 are fixed to the upper end of the moving shaft 7 so as to rotate together with the moving shaft 7. These multi-rotation hms 72.7
3 is held by a mounting portion 74 fixed to the moving shaft 7, and is rotated by a multi-rotation cam 72 with respect to the moving shaft 7 by adjusting a screw or the like.
73 is fixed so that it can rotate. Also, fixed plate 14
A direct-acting limit switch 8 is movably fixed to. The limit switch 8 is installed so as to be located on the outer periphery of the rotating disk 6, and is arranged so that its tip 81 can come into contact with the multi-rotation hm 72 or 73.

The limit switches 8 are provided at several locations in accordance with the detection of the movement i, and the one shown is provided at four locations.

As described above, in the movement amount detector 10, the rotational force input to the input shaft 2 is transmitted to the transmission shaft 3 via the bevel gears 21 and 31. The rotational force transmitted to the transmission shaft 3 is transmitted from the gear 32 to the moving shaft 7 via gears 41, 42, 51, 52, and 71, and from the other gear 33 to the tooth 54 via a plurality of gears. A rotational force is transmitted to the fixed shaft 5. Here, the rotational force transmitted from the transmission shaft 3 is not transmitted as is to the moving shaft 7, but is set to be transmitted to the fixed shaft 5 at a reduced speed. The dark reduction ratio between the transmission shaft 3 and the fixed shaft 5 is such that, if the start and end points of the movement to be measured are one stroke, the fixed shaft 5 will rotate less than one rotation due to this one stroke. . For example, in the case of opening and closing a water gate as described in the conventional example, one stroke is defined as the period from fully closing to fully opening the water gate, and the fixed shaft 5 is set to rotate 300 degrees for this one stroke. . In this way, the movement amount detector 10 has a multi-rotation sensor fixed to a moving shaft 7 whose rotating disk 6 is rotated in accordance with the amount of movement of the device to be detected, and whose position is moved together with the rotating disk 6. The cams 72 and 73 are also configured to rotate, and when these multi-rotation cams 72 and 73 come into contact with the limit switch 8,
This allows a desired amount of movement to be detected.

Next, a case will be described in which the movement amount detector 10 is employed as a detector for the amount of opening and closing movement of a water gate such as a dam. As described above, the water gate is opened and closed by, for example, a hoisting machine, and the rotational force of this hoisting machine is inputted to the input shaft 2 via a speed reduction mechanism or the like. At this time, the fixed shaft 5 is rotated by the rotational force input to the input shaft 2 between when the water gate is fully opened and when it is fully opened.
00 degree rotation). The state shown in FIG. 3, that is, the state in which the limit switch 8 and the multi-rotation cam 72 are in contact with each other, is set as the fully open state of the water gate. Then, at a position rotated 300 degrees from the location where the limit switch 8 is installed, there is a limit [-switch 8a] that detects when it is fully open.
Set up. This limit switch 8a is different in height from the limit switch 8, and is set to come into contact with a multi-rotation cam 73 attached to the upper part of the multi-rotation cam 72. Limit switches 8b and 8c installed between the limit switches 8 and 88 are for detecting, for example, a desired intermediate position between fully open and fully open, and the limit switch 811 is connected to the rotating cam 72. The limit switch 8c is set to abut against the multi-rotation cam 73.

Therefore, the intermediate position when rising from fully closed is multi-rotation cam 7.
2 and limit switch 8! ), and conversely, the intermediate position when descending from the fully open position is detected when the multi-rotation cam 73 and the limit switch 8c come into contact. After setting in this way, if you operate the hoist to open and close the water gate, this movement will be applied to the input shaft 2.
is input to rotate the rotating disk 6 via the transmission shaft 3 and the like. When the multi-rotation cam 72 or 73, which is rotatably supported by a moving shaft 7 fixed to the rotary disk 6, reaches a predetermined position, it comes into contact with each limit switch and sends each signal to the water gate. The current position of the person can be detected.

Moving again! In the ll amount detector, the rotating disk must be rotated so as to correspond to the actual amount of movement, but a slight difference in wA may occur during this f11 adjustment.

Therefore, in the present invention, a highly accurate detector is achieved by rotatably fixing a multi-rotation cam to a rotating disk. This improvement in accuracy was confirmed by conducting the following experiment.

The amount of movement from fully open to fully open to be detected is 60 m, and the amount of movement corresponding to when the rotating disk rotates 300 degrees is b Ow
A case will be described in which the amount of movement when the multi-rotation cam rotates 360 degrees is set to 2 m, and the adjustment error is Q, 5 on the rotating disk.

(1) Error when detected only by C disc...
...3,5c-1 (2) W4 difference when detected by multi-rotation cam...
...0.18cm.

By employing a multi-rotation cam in this way, it was possible to obtain an i-degree improvement of several steps compared to the case of only a rotary disk.

In the above embodiment, a case was described in which the amount of movement of a water gate was detected, but it is also possible to detect the amount of movement of a crane and various other devices and machines. Further, although an embodiment in which two multi-rotation cams are attached has been shown, the number of multi-rotation cams may be one, or may be two or more.
By using a plurality of sheets, it is possible to perform fine-grained detection. Furthermore, other configurations are not limited to the above embodiments.

[Effects of the Invention] As explained above, the present invention detects movement using a rotating disk and a multi-rotation cam that is fixed to the rotating disk and rotates itself. Therefore, for example, compared to the conventional detector shown in FIG. Same-
The detection w1 degree of the present invention is much better than that of the IS detector. Furthermore, in the present invention, a rotating multi-rotation cam is fixed to the rotating disk, and the amount of movement is detected by the contact between this multi-rotating cam and the limits 1 to 4, so that only the rotation of the rotating disk is detected. It is possible to measure the amount of movement even in a range that cannot be covered by conventional methods, and it can provide a detector with extremely high accuracy. In addition, in terms of maintenance, adjustment points can be confirmed at a glance, making adjustments etc. very easy.

[Brief explanation of the drawing]

Fig. 1 is a top view showing a conventional movement amount detector, Fig. 2 is a side view of the movement amount detector shown in Fig. 1, and Fig. 3 is a top view of a movement amount detector which is an embodiment of the present invention. , Figure 4 is Figure 3 IV
-rV line sectional view. 2... Input shaft, 5... Fixed axis, 6... Rotating disk, 7... Moving axis, 51, 52... @Car (transmission vehicle), 72/73
...Multi-rotation cam, 8a, 8b, 8C...mitt switch. Applicant: Nippon Electric Seiki Co., Ltd. Sanbu ■Kobo Co., Ltd. Agent: Patent attorney Takeo Masuda

Claims (1)

[Claims] 1. An input shaft to which a rotational force proportional to the movement of the object to be detected in the moving layer is applied; a fixed shaft rotated by the rotational force from the input shaft; and a fixed shaft rotatably attached to the fixed shaft. , a transmission gear rotated by the rotational force from the input shaft; a rotating disk attached to the fixed shaft and rotated together with the fixed shaft; and a rotating disk rotatably fixed near an end of the rotating disk, and the A moving shaft is rotated by the rotational force from the transmission gear, and a limit switch is attached to the moving shaft and rotated together with the moving shaft, and a portion of the switch hits a limit switch or the like provided at a predetermined position around the rotating disk. A travel amount detector consisting of a multi-rotation cam to be operated and a movement amount detector.