JPH02190508A - Compensation device for limit switch - Google Patents

Abstract

PURPOSE:To make simple and speedy execution of compensation for a limit switch available without being attended with dangers by providing bevel gears and differential bevel gears between an input and an output gears of the compensation device. CONSTITUTION:To the end of an output shaft 13a, an output gear 8 of a compensation device is fixed, and two shafts 14 and 15 are axially supported by the output shaft 13a. To the shaft 15 a brake gear wheel 16 and a bevel gear 10 are fixed, while a bevel gear 9 and an input gear 7 of the compensation device are fixed to the shaft 14. To the other output shaft 13b, integral with the output shaft 13a and being installed at a right angle thereto, differential bevel gears 11 and 12 are fixed so that they are meshed with the bevel gears 9 and 10. Normal control for the compensation device is made with the brake gear wheel 16 kept under locking and as the occasion demands, compensation for a limit switch is carried out by turning the brake gear wheel 16, while the input gear 7 to the compensation device is kept separated therefrom and put under locking.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a limit switch correction device used for controlling or detecting the opening degree of a water gate opened and closed by a wire hoist, for example, using a limit switch.

(Prior Art) For example, as shown in FIG. 8, there is a water gate 19 that is opened and closed by winding up or unwinding a wire 20 with a wire winding machine 1.

The opening degree control or opening degree detection of this water gate 19 is carried out by attaching a hoisting machine output gear 3 to a wire drum 2 driven by a wire hoisting machine, and incorporating a limit switch via an opening gauge input gear 4. The number of rotations of the wire drum 2 is input to the opening degree meter 5, and the opening degree of the water gate 19 is detected based on the number of rotations of the wire drum 2.

In this way, the number of rotations of the wire drum 2 is detected and the water gate 1 is
When controlling the opening degree or detecting the opening degree in step 9, the wire 20
Wire drum 2
A discrepancy occurs between the 0 rotation speed and the opening degree of the water gate 19.

Therefore, it is necessary to correct the limit switch built in the opening meter 5 so that the rotational speed of the wire drum 2 and the opening degree of the water gate 19 match with respect to the elongation of the wire 20.

In the conventional correction of the limit switch, the wire 20 is rewound by the wire hoist 1 until it is detected by the wire slack detector 21, and the water gate 19 is completely lowered to the riverbed.

Next, the connection between the opening gauge 5 and the wire hoist 1, for example, the engagement of the gears 3.4, is released, and the opening gauge 5 is set in a free state.

Then, the wire 20 is wound up with the wire hoisting machine 1,
The wire 20 is stretched until the wire 20 is no longer detected by the wire slack detector 21.

While maintaining this state, the gear 4 of the opening gauge 5 is then turned by hand to activate the internal lower limit switch, and in this state, the gears 3 and 4 are engaged.

As a result, the water gate 19 is placed at the lower limit position with the wire 20 being stretched, and the lower limit switch is activated.

In this way, the connection with the limit switch correction of 1 was shown as gears 3 and 4 directly meshed, but
Some have a chain running between gears 3 and 4, while others have a chain running between gear 4 and sprocket 2.

(Problems to be Solved by the Invention) In correcting the conventional limit switch described above, the connection between the opening gauge and the wire hoist must be released each time, which causes the following problems.

In other words, the amount of wire elongation is different depending on when the wire is new and when the wire has been used for a long time, so it is difficult to determine if the limit switch is out of order, and it is necessary to perform corrections frequently. be.

However, since the above-mentioned release is a very troublesome work, there is a problem that correction of the limit switch becomes lazy, and the opening/closing control and detection of the water gate cannot be performed accurately.

Additionally, if you disconnect the opening gauge from the wire hoist while controlling the opening/closing of the water gate, it is extremely dangerous as your hand may get caught between the sprocket and the chain. Since it takes a long time, there is a problem in that the limit switch must be corrected when the opening/closing control of the water gate is stopped and when it is possible to lower the water gate to the lower limit and cut off the waterway. Similar correction work is also required when newly installed.

Father: The above cancellation work must be done manually, so
There is a problem in that limit switch correction cannot be automated.

(Means for Solving the Problems) In order to solve the above problems, the present invention fixes a correction device output gear to one end of an output shaft, and connects a brake gear and a bevel gear to a shaft pivotally supported by the output shaft. At the same time, a bevel gear and a correction device input gear are fixed to another shaft that is pivotally supported by the output shaft, facing the self-portrait.

and integrally providing another output shaft orthogonal to the output shaft,
The present invention is characterized in that two differential gears are provided which are pivotally supported on the output shaft and mesh with the bevel gears provided oppositely to each other.

(Function) With this configuration, in normal water gate opening control, the rotational force of the hoisting machine is transmitted from the correction device input gear to the differential bevel gear through the bevel gear provided coaxially with this gear. is transmitted and taken out through the output shaft to the corrector output gear. At this time, the brake gear is locked by the brake means.

Next, when correcting the limit switch, the correction device input gear is locked by stopping the hoisting machine.

In this state, rotate the brake gear to correct the limit switch.

That is, the rotation of the brake gear is transmitted to the differential gear through a bevel gear provided coaxially with this gear, and rotates the corrector output gear through the output shaft.

(Example) An example of the present invention will be described in detail below. In FIG. 1, a correction device output gear 8 is provided at the end of the output shaft 13a.
is fixed. 14.15 is a shaft supported by the output shaft 13a.

A brake gear 16 and a bevel gear 10 are fixed to the shaft 151C. The brake gear 16 in this embodiment is a worm wheel that meshes with a worm gear 17.

Further, a bevel gear 9 and a correction device input gear 7 are fixed to the shaft 14. The bevel gears 9 and 10 are opposed to each other. 13
b is an output shaft that is integrally provided so as to intersect at right angles to the output shaft 13aK, and two differential bevel gears 11 and 12 are pivotally supported on this output shaft 13b.

These two differential bevel gears 11 and 12 are the bevel gear 9.
．． It meshes with 10.

In the embodiment shown in FIG. 4, the output gear 17 of the correction brake motor 18 is meshed with the brake gear 16.

Regarding other parts, the same parts as in the embodiment shown in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted.

FIG. 7 shows an example in which the limit switch correction device shown in FIGS. 1 and 4 is applied to a water gate opening/closing device.

That is, the output gear 3 of the wire hoist 1 is meshed with the correction device input gear 7 of the limit switch correction device 6, while the input gear 4 of the opening gauge 5 is meshed with the correction device output gear 8. They mesh together.

The operation of this embodiment configured in this way will be described next.

First, during limit switch correction, the wire hoist 1 is stopped at an arbitrary position.

For example, as in the conventional case, the water gate is stopped when it is lowered to the lower limit or at a completely arbitrary position.

By stopping the hoisting machine 1, the correction device input gear 7 is locked.

If the worm gear 17 is manually rotated in this state, the second
As shown in the figure, the locked corrector input gear 7 (bevel gear 9) remains stationary, and the worm wheel (brake gear) IAK! ! The D bevel gear 10 is rotated. As a result, the differential bevel gears 11, 12 are rotated, and the shaft 13b
, 13a to rotate the corrector output gear 8.

That is, the manual rotational force of the worm gear 17 is applied as shown by the arrow A in a state separated from the correction device input gear 7.
It is transmitted to the correction device output gear 8 as shown by B and C. In FIG. 7, the opening gauge 5 is corrected via the opening gauge input gear 4 which is meshed with the corrector output gear 8.

For example, the worm gear 17 is manually operated so that the on-site opening indicator of the water gate stopped at an arbitrary position matches the opening indicator (not shown) of the opening indicator 5.

By arbitrarily stopping the hoisting machine 1 that has been in operation in this way, the wire 20 is kept in a tensioned state, and the on-site opening gauge of the water gate 19 (Fig. 8) By matching the opening indicators of the opening gauge 5, the wire 20 of the opening gauge 5
Errors due to elongation are corrected.

From this K, the correspondence between the opening gauge 5 and each limit switch becomes accurate.

In this way, the hoisting machine 1 can be stopped and the limit switch can be corrected by operating the worm gear 17, so it can be used at any normal time, even if it is not when the water gate is fully closed or when the control is stopped. It is possible to do so.

Next, during operation, as shown in FIG. 3, the worm wheel (brake gear) 16 is
．． The bevel gear 10 is locked.

The rotational force of the correction device input gear 70 rotated by the hoisting member 1 is as shown by the arrows E and F.

As shown in G, the signal is transmitted to the correction device output gear 8 through the bevel gear 9, the differential bevel gears 11 and 12, and the output shafts 13b and 13a.

Then, the position meter 5 is connected to the position meter input gear 4 shown in FIG.
is output to.

FIG. 5 shows an operating state in which the brake gear 16 is locked by the correction brake motor 18 and the rotational force of the correction device input gear 7 is transmitted to the correction device output gear 8 as indicated by arrows E, F, and G. 6, the hoisting machine 1 is stopped, the correction device input gear 7 is locked, and the motor 1 with a correction brake is turned on.
8 shows an operating state in which the corrector output gear 8 is driven by transmitting rotational force as indicated by arrows AXB, C, and C'.

This operation can be performed automatically by the motor 18 with a correction brake.

(Effects of the Invention) As detailed above, according to the present invention, a correction device output gear is fixed to one end of the output shaft, two shafts are supported on the output shaft, and a brake gear and an umbrella are mounted on one shaft. A bevel gear and a correction device input gear are fixed to the other shaft of the gear, and two differential gears are pivotally supported on another output shaft integrally provided orthogonal to the output shaft, and meshed with the double gear. Since the limit switch correction device is used, normal operation (control) is performed by locking the brake gear, and during correction, the correction device input gear is locked and the brake gear is rotated in a state separated from this.
Limit switches can be corrected.

As a result, the correction work can be carried out very easily and in a short time without any danger.

Therefore, the work is hassle-free and can be done at any time, and the accuracy of the control of the opening of the water gate can be maintained at all times.

Furthermore, since this correction can be performed automatically, it has the excellent effect of making the control of the opening of the water gate in response to the elongation of the wire more accurate.

[Brief explanation of the drawing]

1 to 7 show an embodiment of the present invention, FIG. 1 is a schematic diagram of a limit switch correction device, and FIG. 2 is a schematic diagram showing a state of correction in the embodiment of FIG. 3 is a schematic diagram showing a state in which normal control is performed in the embodiment of FIG. 1, FIG. 4 is a schematic diagram of a limit switch correction device using a motor with a correction brake, and FIG. FIG. 6 is a schematic diagram showing a state in which normal control is performed in the embodiment shown in FIG. 4, FIG. 7 is a schematic diagram showing a state in which correction is performed in the embodiment shown in FIG. FIG. FIG. 8 is a front view shown for explaining the water gate opening adjustment device. 7.-Correction device input gear, 8-.Correction device output gear, 9
．． 10...Bevel gear, 11.12...Differential gear, 13
a, 13b--output shaft, 14.15--shaft, 16--brake gear. Figure 1

Claims (1)

[Claims] A correction device output gear is fixed to one end of the output shaft, a brake gear and a bevel tooth are fixed to a shaft rotatably supported by the output shaft, and a bevel gear is mounted opposite to the bevel gear to another shaft rotatably supported by the output shaft. A gear and a correction device input gear are fixed, another output shaft is integrally provided perpendicular to the output shaft, and two differential gears are pivotally supported on the output shaft and mesh with the bevel teeth provided opposite to each other. A limit switch correction device characterized by being provided with a bevel gear.