JPS6138563B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION After the present invention presses the pushbutton and contacts the contacts,
Stepless motor forward/reverse speed control that changes the voltage steplessly by changing the distance between the magnet and Hall element as the push button travels, allowing the power supply voltage of control devices such as electric chain blocks to be changed steplessly. It relates to an operating device.

Conventional pushbutton switches use the first switch for winding.
The electric chain block is constructed such that when the push button of the step is pressed down, the contacts of the low voltage circuit are closed and the motor rotates at low speed, and when the push button is further pressed down, the contacts of the high speed circuit are closed and the motor is rotated at high speed. Operations such as cranes and hoists could not be controlled steplessly. There is also known a device that improves this and uses a push button mechanism for continuous control using a mechanical-electric conversion device such as a potentiometer.

In the conventional devices as described above, whether the control is carried out stepwise or steplessly, the contacts are brought into mechanical contact, resulting in drawbacks such as poor contact and wear and tear of the contact portions.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the conventional drawbacks and provide a stepless motor forward/reverse speed control operating device that can be electrically controlled steplessly without contact and without wear parts.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The motor forward/reverse speed stepless control operating device (hereinafter simply referred to as the operating device) of the present invention will be explained based on the drawings.

FIG. 1 shows the movable contact portion and fixed contact portion of the push button shown in FIG. 2 of the operating device of the present invention, Y-L-L'-M'-
2 is a cross-sectional view taken along the line M-Y' of the operating device in an inoperative state, FIG. A sectional view of the high-speed winding state, FIG. 5A shows the arrangement of movable and fixed contacts, and FIG.

In the figure, P _B is the operating device of the present invention, Pu is a winding push button (hereinafter referred to as the lifting push button), and P
_D is the winding push button (hereinafter referred to as the lowering push button), 1 is the operating device case, 2 is the operating device base (hereinafter simply referred to as the base), and 2-1 is formed integrally with the base 2 on the outside. The push button guide outer plate (hereinafter simply referred to as the guide outer plate), 2-2 is also the push button guide inner plate (hereinafter simply referred to as the guide inner plate), 2-
3 is a cylindrical recessed part (hereinafter referred to as a recessed part), 3 is a lid of the base 2, and 4 is a square box with a locking piece that protrudes inward from the open end in an annular shape at right angles around the side plate. A movable slider (hereinafter simply referred to as a mover) holds a contact support plate 6 with an opening facing downward at the center and slides up and down along the guide inner and outer plates (hereinafter simply referred to as a mover), 5 is a push button guide Pillar (hereinafter referred to as guide pillar), 5
-1 is a button part provided at the top of the guide column 5, 5-
2 connects the guide column 5 and the button part 5-1 to the button part 5-
1 is partially exposed at the top and sealed, and the lower end is fixed to the lid body 3. A cover body that can expand and contract with the movement of the button part 5-1, and 7 a mounting plate for the metal contact 7-1 (hereinafter referred to as 8 is a locking spring provided between the inner upper lower surface of the movable element 4 and the upper surface of the contact support plate 6 to lock the contact support plate 6 to the locking piece 4-1, and 9 is a base. The locking pieces 4-11 of the movable element 4 arranged on the upper part of the bottom plate of the movable element 2 are disposed in the recessed notches 2-3 provided in the opposing bottom plate, and have the function of pushing the movable element 4 upward and returning. A return spring that is compressed as the movable element 4 descends, 10 a screw and terminal, 10-1 a fixed contact,
4-2 is an integrally provided pressing arm extending horizontally from the upper part of the inner plate of the movable member 4 and having a width covering about half the area of the magnet holding plate; 11 is a magnet pushing-up spring; 12 is a magnet, 13 is a Hall element, 14 is a magnet mounting plate, 15 is a seesaw type push button press lever (hereinafter referred to as a press lever), 16 is lever 1
5, the rotation support shaft (hereinafter referred to as the support shaft) is shown. A movable contact member is composed of a movable slider, a contact support plate, and a locking spring.

Fig. 6 shows a control device such as an electric chain block (hereinafter referred to as chain block device), and reference numeral C is the operating device of the present invention.First, we will explain the configuration and operation of controlling the chain block device in a non-contact and stepless manner using the operating device. explain.

In the figure, U and V are power supply terminals, T is a transformer,
SCR is a thyristor, G is a gate electrode, IC is an amplifier, _IC2 is a comparison amplifier, PT is a pulse oscillation circuit, M
indicates a motor. After pressing the pushbutton Pu or P _D to bring the movable/fixed contacts 7-1 and 10-1 into contact, the magnet 12 is further moved downward by the pressing arm 4-2, and the magnet 12 is caused to act on the Hall element 13. The voltage generated in the Hall element 13 corresponding to the moving distance of 12 is appropriately amplified by the amplifier IC ₁ , and the voltage of the thyristor SCR and the amplified voltage of the Hall element 13 are compared and amplified by the comparison amplifier IC ₂ . The pulse oscillation circuit PT emits pulses synchronized with the input power source using the output, which is applied to the gate electrode G to control the voltage of the thyristor SCR, thereby making it possible to control the motor M steplessly. Regarding the control device such as the electric chain block mentioned above, Japanese Patent Application No. 53-60769 (Patent Publication No. 59-60769 filed on the same day)
4955).

The configuration and operation of the operating device of the present invention will be explained.

Raise and lower push buttons inside the operating device case 1
Since Pu and P _D are configured symmetrically to the right and left of the center line, the configuration and operation of the left up pushbutton Pu will be explained in the figure.

When the operating lever 15 is rotated downward around the rotational support shaft 16 and the up pushbutton Pu is pressed, the movable member 4, which includes the button part 5-1, the guide column 5, the locking spring 8, and the contact support plate 6, moves to the base. 2 guide inner and outer plates 2
-1, 2-2, compresses the return spring 9, and descends until the contact 7-1 of the contact plate 7 contacts the fixed contact 10-1. In this state, the locking spring 8 is not yet compressed. One side up push button
Simultaneously with the descent of Pu, the magnet 12 is lowered by the pressing arm 4-2 provided integrally with the movable element 4, and the magnet 12 is moved by the spring 1.
1 is compressed to reduce the distance from the Hall element 13. FIG. 3 shows this state, and shows that the motor M is rotated at a low speed with a voltage corresponding to the distance between the magnet 12 and the Hall element 13 to perform winding. Even if the upward pushbutton Pu is further depressed, the position of the contact 7-1 does not change because the contact 7-1 is stopped from descending by the fixed contact 10-1. On the other hand, since the contact support plate 6 is only pressed by the locking spring 8 on the locking piece 4-1 of the mover 4, when the mover 4 descends, the locking spring 8 is compressed and the locking piece 4-1 descends together with the mover 4 to further compress the return spring 9. On the other hand, the magnet 12 provided in the center is the magnet push-up spring 1
1 is further compressed, and the distance between the magnet 12 and the Hall element 13 is further reduced.

FIG. 4 shows this state, and winding is performed by rotating the motor M at a high speed with a voltage corresponding to the distance between the magnet 12 and the Hall element 13. Equipped with two stepless control units,
They can also be controlled separately with pushbuttons. The left up pushbutton Pu also applies to the right down pushbutton P _D.
It has exactly the same configuration and operation as . The same effect is produced regardless of whether the magnet 12 or the Hall element 13 is moved.

Since the operating device of the present invention has the above structure, once the power supply contact of the operating device is closed, no matter how the operating device is operated, stepless control is possible without the need to mechanically open and close the circuit contacts. Since the control unit can generate and control a voltage that changes continuously from the control unit, there is no wear of bad contacts as an operating device, and stepless control is possible. Since the structure is extremely small, it is possible to utilize a small space that was previously not used between two pushbutton switches, and it is possible to install a conventional two-stage operating device without changing the size at all. , the stepless control unit can be used in common with two pushbuttons, and other effects are produced.

[Brief explanation of the drawing]

FIG. 1 shows the movable contact portion and fixed contact portion of the push button shown in FIG. 2 of the operating device of the present invention, Y-L-L'-M'-
2 is a sectional view taken along line MY in an inoperative state, FIG. 2 is a sectional plan view taken along line XX in FIG. Figure 5A shows the arrangement of movable and fixed contacts, Figure B shows a contact connection diagram, and Figure 6 shows a control device such as an electric chain block. Pu, P _D : Up and down push buttons, 2: Operating device, 2-1, 2-2: Guide outer and inner plates, 3: Lid body,
4: Mover, 5: Guide column, 5-1: Button part,
5-2: Cover body, 6: Contact support plate, 7: Contact mounting plate, 7-1: Contact, 8: Locking spring, 9: Return spring, 10: Screw/terminal, 10-1: Fixed contact, 1
1: Magnet push-up spring, 12: Magnet, 13: Hall element, 14: Magnet mounting plate, 15: Push button operation lever, 16: Support shaft.

Claims (1)

[Claims] 1 A movable contact member consisting of a movable slider and a movable contact movably attached to the movable slider and urged inwardly and downwardly in the base, and a fixed contact fixed to the base; A stepless control unit in which two pushbutton switches equipped with springs that return the slider upward are arranged in parallel, and one motor circuit consisting of a magnet and a Hall element is connected between the two pushbutton switches. A magnet and a Hall element are configured so as to be relatively close to and separate from each other, and a pressing arm is integrally provided on the outside of each movable slider, and the pressing arm is connected to the magnet or hole of the stepless control section. The movable slider is positioned close to and separated from the upper part of the element, and by pressing the one push button switch, one movable slider is lowered, the movable contact is brought into contact with the fixed contact, and while in contact, the pressing arm is The motor is characterized in that a two-piece pushbutton switch is configured to steplessly control the speed by rotating the motor in the forward or reverse direction by adjusting the distance between the magnet and the Hall element of the one stepless control unit. Motor forward/reverse speed stepless control operation device.