JPH025677B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an operating device for a two-speed electric hoisting device, which has a high-speed lifting speed regulator and a low-speed lifting speed regulator in an operation box. be.

[Prior art]

Conventionally, the operation control device for an electric hoisting device such as an electric chain block has been equipped with a push button switch for hoisting operation and a push button switch for hoisting operation in an operation box connected to a cable hanging down from the electric hoisting device main body. An operating device is known that is provided with a push button switch and one variable resistor for adjusting the speed of elevation.

[Problem that the invention seeks to solve]

However, in the case of the conventional driving operation device,
When hoisting or lowering a load at an appropriate speed, hold the operation box with one hand and press and hold the hoisting pushbutton switch or lowering pushbutton switch while adjusting the lifting speed with the other hand. The operation is complicated because the lifting speed must be adjusted by operating a variable resistor.

[Date and composition of the invention]

It is an object of the present invention to provide an operation device for a two-speed electric hoisting device having a speed change setting device that can advantageously solve the above-mentioned problems. In an operation box 3 connected to a cable 2 hanging from the hoisting device main body 1, there are a low speed adjustment setting device VR1 and a high speed adjustment setting device VR2 connected to the speed change control circuit 4.
and a low speed adjustment setting device VR1 is set in the operation box 3 by pressing the first step and the second step.
and a two-stage winding push button switch PB- that switches and connects the high-speed adjustment setting device VR2 to the speed change control circuit 4.
U and a lowering two-step push button switch PB-D that switches and connects the low speed adjustment setting device VR1 and the high speed adjustment setting device VR2 to the speed change control circuit 4 by pressing the first step and the second step. The present invention provides an operating device for a two-speed electric hoisting device having a speed change setting device.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

1 to 5 show an embodiment of the present invention, in which an electric hoist main body 1 is installed in an operation box 3 connected to a cable 2 hanging from an electric hoist main body 1. A low speed adjustment setting device VR1 consisting of a variable resistor and a high speed adjustment setting device VR2 consisting of a variable resistor connected to the speed change control circuit 4 provided in the operation box 3 are provided.
The hoisting device 2 connects the low speed adjustment setting device VR1 to the speed change control circuit 4 when the first step is pressed, and connects the high speed adjustment setting device VR2 to the speed change control circuit 4 when the second step is pressed. step push button switch
PB-U is provided, and connects the low speed adjustment setting device VR1 to the speed change control circuit 4 when pressing the 1st step, and connects the high speed adjustment setting device VR1 to the speed change control circuit 4 when pressing the 2nd step.
A lowering two-stage pushbutton switch PB-D is provided to connect VR2 to the speed change control circuit 4, and the adjustment knobs 5 and 6 of the low speed adjustment setting device VR1 and the high speed adjustment setting device VR2 are operated by an operation box. 3, and an operation box 3
The upper part of the lid 7 that covers each of the adjustment knobs 5 and 6 is pivotally attached to the upper part of the front surface of the , and the lid 7 is held in the closed position by a lid closing spring 8, and when the electric hoisting device is operated, the lower speed adjustment is performed. The knobs 5 and 6 of the setting device VR1 and the high-speed adjustment setting device VR2 are configured not to be operated.

On the front of the operation box 3, there is a low speed adjustment setting device.
It is fixed to a display board 11 having a low speed adjustment scale 9 corresponding to VR1 and a high speed adjustment scale 10 corresponding to high speed adjustment setting device VR2, and is fixed to a display board 11 having a two-stage pushbutton switch PB-U for hoisting and a pushbutton 12 for hoisting. The pushbutton 13 of the two-stage pushbutton switch PB-D is provided on the front surface of the operation box 3.

Figure 5 shows the operation control circuit, and when the two-stage hoisting pushbutton switch PB-U is pressed to the first stage position, the two-stage hoisting pushbutton switch PB-U is pressed.
- Since the hoisting contact A at U is turned on, hoisting operation of the electric hoisting device is started. In this state, the low speed adjustment setting device VR1 is connected to the speed control circuit 4, so the low speed adjustment setting device VR1 is connected to the speed control circuit 4. Hoisting operation is performed at a predetermined low speed set by VR1.

In addition, the two-stage push button switch for winding PB-U
When pressed to the second position, the high-speed operation contact B of the two-stage hoisting pushbutton switch PB-U is turned on, and the relay R is energized.
Since the contact 14 is switched and the high speed adjustment setting device VR2 is connected to the speed control circuit 4, the hoisting operation is performed at a predetermined high speed set by the high speed adjustment setting device VR2.

When the two-stage hoisting pushbutton switch PB-U is returned to the first stage position, the hoisting operation is performed again at a low speed, and when the pressing force is released from the two-stage hoisting pushbutton switch PB-U, the winding starts. Top operation is stopped.

Next, press the two-step pushbutton switch PB-D for lowering.
When it is pressed to the step position, the lowering contact C of the two-stage lowering pushbutton switch PB-D is turned on, so the lowering operation of the electric hoisting device is started, and in this state, the speed change control circuit 4 Since the adjustment setting device VR1 is connected, its low speed adjustment setting device VR1
The lowering operation is performed at a predetermined low speed set by.

In addition, the two-stage push button switch PB-D for lowering
When pressed to the second position, the high-speed operation contact D of the lowering two-step pushbutton switch PB-D turns on, and the relay R is energized.
Since the contact point is switched and the high speed adjustment setting device VR2 is connected to the speed control circuit 4, the lowering operation is performed at a predetermined high speed set by the high speed adjustment setting device VR2.

When the two-stage lowering pushbutton switch PB-D is returned to the first stage position, the lowering operation is performed again at low speed, and when the pressing force is released from the two-stage lowering pushbutton switch PB-D, the winding starts. Lower operation is stopped.

When the two-step pushbutton switch for hoisting PB-U is pressed, the interlock contact E turns off, so in this state, the two-step pushbutton switch for hoisting PB-U is pressed.
Even if -D is pressed, the lowering operation circuit does not operate. Also, when the lowering two-stage pushbutton switch PB-D is pressed, the interlock contact F is turned off, so
Even if the two-stage hoisting switch PB-U is pressed in this state, the hoisting operation circuit will not operate. Note that since the speed change control circuit 4 is conventionally known, a description of its configuration will be omitted.

When carrying out this invention, as shown in FIG. 6 and FIG. Adjustment axis 1
5 and 16 may not be able to rotate, and the entire low speed adjustment setting device VR1 and high speed adjustment setting device VR2 are housed in the operation box 3, and usually each low speed adjustment setting device VR1 and high speed adjustment setting device Setting device
It may also be possible to make it impossible to adjust VR2.

As the low speed adjustment setting device VR1 and the high speed adjustment setting device VR2, an adjustment setting device such as a potentiometer that changes an electric signal by mechanical operation means may be used instead of a variable resistor, and the speed control The circuit 4 may be provided within the operation box 3.

〔Effect of the invention〕

According to this invention, the low speed adjustment setting device VR1 and the high speed adjustment setting device VR2 connected to the speed change control circuit 4 are provided in the operation box 3 connected to the cable 2 hanging from the electric hoist main body 1. is provided in the operation box 3, and a two-stage winding push button switch PB-U is provided in the operation box 3, which switches and connects the low speed adjustment setting device VR1 and the high speed adjustment setting device VR2 to the speed change control circuit 4 by pressing the first step and the second step. Low speed adjustment setting device VR1 by pressing 1st step and 2nd step
and a two-stage lowering pushbutton switch PB- that switches and connects the high-speed adjustment setting device VR2 to the speed change control circuit 4.
D, the electric hoisting device can be operated at a predetermined low speed by simply pressing the two-step hoisting pushbutton switch PB-U or the two-step hoisting pushbutton switch PB-D. It is possible to perform hoisting operation or lowering operation at a predetermined low speed, and simply press the hoisting pushbutton switch PB-U or the hoisting pushbutton switch PB-D to the 2nd position. This allows the electric hoisting device to be operated at a predetermined high speed for hoisting or lowering at a predetermined high speed. Operation can be easily performed with one hand operation, and the low speed adjustment setting device VR1 and the high speed adjustment setting device VR2 have the following features:
The control box 3 is located on the floor at a low level within the reach of the driver, so after installing the electric hoisting device, it can be easily adjusted to low and high speeds that are optimal for the characteristics of the transported object. Effects such as being able to adjust to

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention, in which FIG. 1 is a side view of an electric hoist having an operating device of the present invention, and FIG. 2 is a two-stage hoisting device of the present invention. 3 is a sectional view taken along line GG in FIG. 2, FIG. 4 is a front view of the speed display section, and FIG. 5 is a driving operation circuit diagram. FIG. 6 is a front view showing another example of the operating device for the two-speed electric hoisting device, and FIG. 7 is the H-
It is an H line sectional view. In the figure, 1 is the main body of the electric hoisting device, 2 is the cable, 3 is the operation box, 4 is the speed change control circuit, and 5
and 6 is an adjustment knob, 7 is a lid, 8 is a spring for closing the lid, 12 and 13 are push buttons, VR1 is a low speed adjustment setting device, VR2 is a high speed adjustment setting device, PB-U
PB-D is a two-stage push button switch for winding up, and PB-D is a two-stage push button switch for lowering.

Claims (1)

[Claims] 1 A low speed adjustment setting device VR1 and a high speed adjustment setting device VR2 connected to the speed change control circuit 4 are provided in the operation box 3 connected to the cable 2 hanging from the electric hoisting device main body 1, and The low speed adjustment setting device VR1 and the high speed adjustment setting device VR are displayed in the operation box 3 by pressing the first step and the second step.
The two-step winding push button switch PB-U, which switches and connects 2 to the speed change control circuit 4, switches and connects the low speed adjustment setting device VR1 and the high speed adjustment setting device VR2 to the speed change control circuit 4 by pressing the first step and the second step. An operating device for a two-speed electric hoisting device having a speed change setting device, characterized in that a two-step push button switch PB-D for lowering is provided.