JPH07286644A - Towing machine tension display method - Google Patents

Abstract

PURPOSE:To attain labor saving and efficiency improvement drastically at the time of tractor operation by obtaining chain tension on the basis of a motor electric current value, at the same time conducting the ton display of this tension in a bargraph shape. CONSTITUTION:A micro computer 7b at a remote control body 17 has built-in 1.5 ton first and second data tables 100, 101 to carry out the ton display of chain tension, and by changing selectively the respective data 100a, 101a of the respective data tables 100, 101 by means of a ton changeover switch 200, display is made at a second display portion 19b. The second display portion 19b conducts the display of chain tension in a bargraph shape by using plural segments S1-Sn that are by means of liquid crystal or the like. In a case in which a motor is driven and traction operation is conducted, a motor electric current value is detected, and tension is calculated from motor electric current value data, and from this tension value, ton display is displayed in the bargraph shape on the basis of the data tables 100, 101.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension display method for a towing machine, and more particularly to a novel method for displaying the tension of a chain in tonnes by displaying the tension in a bar graph form based on the detected motor current value. Regarding improvement.

[0002]

2. Description of the Related Art As a traction machine of this type that has been conventionally used, for example, in the case of a lever hoist used for re-installing a pillar of a building, as shown in FIG.
It is obliquely arranged between a and 2a, the intermediate portion 1b, and the upper portion 2c. That is, in the case of the first lever hoist 3, a pair of hooks 4 provided at both ends of the chain 30.
a and 4b are provided between the intermediate portion 1b and the lower portion 1a of the columns 1 and 2. In the case of the second lever hoist 5, the wire rope 6 connected to the upper portions 2c of the pillars 1 and 2 is connected to the chain 8 via the wire clip 7, and the chain 8 is connected to the pillar 8 via the second lever hoist 5. 1 is connected to the lower part 1a.

[0003]

Since the conventional towing machine is constructed as described above, the following problems exist. That is, in the above-mentioned conventional example, each lever hoist is operated by input, and the tension adjustment is largely due to the feeling and experience of the operator, and it is a heavy physical work for the operator. As the average age of workers increased, the work was extremely difficult.

The present invention has been made to solve the above problems, and in particular, the tension of a chain is displayed in tonnes by displaying the tension in a bar graph shape based on the detected motor current value. It is an object of the present invention to provide a tension display method for a towed machine.

[0005]

A tension display method for a tractor according to the present invention is a tractor in which a chain is moved by rotating a sprocket via a motor driven by an electric drive and a speed reducer. Based on the motor current value data obtained by the electric drive unit, the tension of the chain is displayed in tonnes in a bar graph form on the second display unit of the remote control unit using a plurality of display segments.

[0006]

In the tension display method for a towing machine according to the present invention, the motor current value data transmitted from the motor drive unit to the remote control unit by wire or wirelessly is processed in the microcomputer of the remote control unit to obtain 1.5. The ton display can be performed in the form of a bar graph on the second display unit, which is a tension display meter, using a data table for either ton or 3 ton. Therefore, the operator can display the tension as the display for 1.5 tons or 3 tons by switching the ton changeover switch of the remote control at the time of operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a tension display method for a towing machine according to the present invention will be described in detail below with reference to the drawings. Figure 1
In FIG. 1, reference numeral 1 denotes an electric drive body, and the first microcomputer 7a having the first arithmetic unit 7a _{1 including} the CPU provided in the electric drive body 1 has two
The power source A from the secondary battery 2 is the first DC / DC converter 3a
And the first microcomputer 7a is connected to the first data bus 7A.
OM 8a, first RAM 9a, first interface 5
a, the first A / D converter 4a, and the first PWM output unit 6. Further, the secondary battery 2 is connected to the first A / D converter 4a via the first voltage divider 26a.

The first interface 5a has a first
The display unit 19a and the switch 24 are connected to each other, and the switch 24 is configured to interlock with the reduction ratio changeover switch 23 having the reduction gear 22.

The PWM output unit 6 is provided with a motor driver 12 (power source is a secondary battery as indicated by a symbol A) which is a well-known power element including four power FETs via an insulating photocoupler 11. (Supplied from 2) is connected, and the normal rotation signal 6a is supplied from this photocoupler 11.
The reverse rotation signal 6b is output to the motor driver 12. The current sensor 20 provided on the power supply line of the motor driver 12 is input to the first A / D converter 4a via the amplifier 21.

A DC type motor 15 is connected to the motor driver 12, the motor 15 is connected to the speed reducer 22, and the motor 15 is connected to a chain 30.
It is configured to rotate the sprocket 32 of the towing machine 31 that winds and tows.

The first arithmetic unit 7a ₁ is connected to the second arithmetic unit 7b ₁ of the second microcomputer 7b via the first digital serial communication circuit unit 16a and the second digital serial communication circuit unit 16b of the remote controller 17. Connected,
The second microcomputer 7b comprises a second data bus 7B, a second ROM 8b, a second RAM 9b, a second interface 5b and a second A / D converter 4b. The second interface 5b has a second display unit 1
9b is connected, and the second microcomputer 7b is supplied with power from the battery 25, which is a secondary battery or a normal battery, via the second DC / DC converter 3b. Further, the battery 25 is connected to the second A / D converter 4b via a second voltage divider 26b.

The microcomputer 7b has a 1.5 ton first data table 100 and a second data table 101 for displaying the tension of the chain 30 in tons.
Is built in, and each of these data tables 100, 10
The respective data 100a and 101a from 1 are displayed on the second display section 19b by the ton changeover switch 200 provided on the remote control body 17.

[0013] The second display unit 19b, by using a plurality of segments S ₁ to S _n in the liquid crystal or the like is configured to be able to be displayed on the bar graph form, each segment S ₁ to S _n
Tons can be displayed by reversing black to black.

Next, the above-mentioned traction machine 31 is operated by the operation shown in FIGS.
It is configured as shown in. In FIG. 3, reference numeral 10 is an electric drive body having a built-in DC type motor 15, and the motor 15 has a switch 12a for starting and stopping the motor 15 and a rotation direction changeover switch 12b. The motor driver 12 is connected, and the motor 15 and the motor driver 12 are configured to be driven by the secondary battery 2. The motor driver 12 and the secondary battery 2 are connected to the first antenna 50.
It is connected to the first wireless transceiver 51a having a.

An overload protection unit 80 (for example, a well-known torque limiter structure) is connected to the motor 15 via a speed reducer 16. The overload protection unit 80 has a rotating coupling projection 73 protruding therefrom. It is provided.

The speed reducer 16 is provided with a rotation speed changeover switch 18, and the rotation speed changeover switch 18 is connected with a first display portion 19a such as a tension display meter connected to the motor driver 12. There is. The first display portion 19a is configured to calculate the motor generated torque from the value of the current flowing through the motor 15 by the motor driver 12, and convert the torque into the tension based on the reduction ratio of the speed reducer 16 and the sprocket diameter of the sprocket 32 described later. The function is obtained without using the torque sensor, and the scale conversion of the first display unit 19a can be changed in association with the change of the reduction ratio.

A well-known one-touch coupling 74 provided at one end 10a of the electric drive body 10 allows the electric drive body 10 to be detachably attached to a chain winding mechanism 72 having the chain 30 wound around the sprocket 32. The second hook 25 is attached to the handle portion 70 that is attached and hangs downward at one end 72a of the chain winding mechanism portion 72 via a rotation mechanism 71 so as to be rotatable.

The connecting protrusion 73a is provided at the one end 72a.
Is provided with a coupling recess body 27 which is connected to the sprocket 32 via the chain winding mechanism speed reducer 22, and one end 30a of the chain 30 is a free end. The first hook 29 is connected to the other end 30b. Although not shown, the chain winding mechanism speed reducer 22 is connected to a mechanical brake (not shown) that instantaneously functions when the operation is stopped.

The tractor 31 shown in FIG. 3 is constructed as shown in FIGS. 4 and 5, and the secondary battery 2 is detachably provided at the end of the handle 70. The one-touch coupling 74 described above employs a well-known structure of a ring slide type coupling as shown in FIGS. 4 and 5.

Further, in a state where the chain 20 is pulled by tension, even if the electric drive body 10 is separated from the chain winding mechanism section 72, a mechanical brake ( (Not shown)
Therefore, the chain 30 is configured so as not to loosen. The switch 12a doubles as a start / stop command and a rotation speed setting command. When the switch 12a is deeply inserted, the rotation of the motor 15 is accelerated, and the rotation of the motor 15 is reduced by the speed reducer 16, the overload protection unit 80, Connecting protrusion 7
The sprocket 32 is configured to be able to rotate in the forward and reverse directions via the coupling recess 27, the coupling recess 27, and the chain winding mechanism speed reducer 22.

The rotation speed changeover switch 18 is mechanically connected to the speed reducer 16 and can freely change the meshing combination of the gears (not shown) therein. In this case, there are two stages. The speed reduction ratio is selected, and the first display unit 19a is configured so that its display scale can be switched in association with the rotation speed changeover switch 18.

The first radio transmitter / receiver 51a is a second remote control body 17 which is constructed separately from the electric drive body 10.
The wireless transmitter / receiver 51b is wirelessly coupled to each other via the antennas 50a and 50b. The remote control body 17 includes a battery 61 and a second microcomputer 7 including a CPU.
b, a second display having the same display function as the first display unit 19a
Any one of the display unit 19b, the rotation direction command switch 63 for issuing a rotation direction command of the motor 15, and the plurality of electric drive bodies 10 (a single unit in FIG. 3, but a plurality of cases) is freely selected. In the case, the second wireless transceiver 51b is connected to the second microcomputer 7b, the battery 61 and the selection switch 64,
This remote control body 1 is connected via the second wireless transceiver 51b.
All information of No. 7 can be communicated with the towing machine 31 via the first wireless transceiver 51a.

Next, the operation will be described. First, as shown in FIGS. 3 and 7, after activating the switch 12a by turning on the switch 12a, the second hook of the chain winding mechanism 72 is locked to the locking portion 40 of the lower portion 1a of the pillar 1, and the chain 30 First of
By operating the rotation direction command switch 63 of the remote control body 17 while the hook 29 is locked to the wire clip 7 of the wire rope 6, the rotation direction command is changed to the second direction.
Microcomputer 7b, first and second wireless transceiver 5
Motor 1 via 1a, 51b and motor driver 12
5 is driven, the sprocket 32 is rotated through the reduction gear 16, the overload protection device 80, and the chain winding reduction gear 22, and the chain 30 is wound up, and, for example, the building condition of the pillar 1 of the building is adjusted. You can The start / stop command is also issued by the remote control body 17.

In the above-described case, the rotation direction of the chain 30 can be freely remote-controlled via the rotation direction command switch 63, and the tension condition of the chain 30 is displayed in the same manner by the respective display portions 19a and 19b. Operating body 1
7, the tension state of the chain 30 can be checked in real time.

The second display portion 19b of the remote control body 17
Serves as both a tension value display and a battery charge alarm (state) display of the secondary battery 2, and the motor current value of the motor 15 and 2
Secondary battery voltage value of secondary battery 2 is A / D converter (not shown)
The result calculated by the second microcomputer 7b is displayed on the display surface formed of the LCD or the LED of the second display unit 19a via the. The second display unit 19a serves both as a tension value display by a ton display and as a battery charge alarm for the secondary battery 2, and a digital signal such as a motor current value data which is a tension value received by wireless communication is sent to the second micro. Computer 7b
Display the result calculated by. Further, it also serves as a battery replacement alarm for the battery 61 of the remote control body 17, and the result of calculating the voltage value of the battery 61 by the second microcomputer 7b can be displayed.

Although not shown, the remote control body 17 is also provided.
Using the selection switch 64 of 1., the plurality of traction machines 31 provided on the wires 6 of each pillar 1 are individually and remotely controlled by using one remote control body 17, and the tension of the wires 6 can be freely adjusted. You can also

Next, the operation of displaying the tension based on the configuration shown in FIGS. 1 and 2 will be described. First, when the electric motor 10 is used to drive the motor 15 to pull the chain 30 via the sprocket 32, the switch 12 shown in FIG.
When b is turned on, the drive command is fetched by the first microcomputer 7a, and after the arithmetic processing, either the forward or reverse signals 6a and 6b are supplied from the PWM output unit 6 to the motor driver 12 to rotate the motor 15. Be seen.

In this case, the value of the current flowing through the motor 15 is detected by the current sensor 20 and is converted into the motor current value data 20a from the first A / D converter 4a to the first through the amplifier 21.
The torque generated by the motor is calculated by being taken into the microcomputer 7a. Further, the tension of the chain 30 is calculated from the sprocket diameters of the speed reducer 22 and the sprocket 32, and the tension value is displayed as a ton on the first display portion 19a.
Displayed by CD or LED. The tension of this chain 30 is tension = K _T · i · K · η · (1 / r) (k
g), K _T is the torque constant (kgcm / A), i is the current (A), K is the reduction ratio 1 / K K, η is the efficiency (<1), r
Is the sprocket radius (cm).

Further, the motor current value data 20a is calculated by a program by the first ROM 8a and the first RAM 9a, and the peak value of the tension value 20a is held. The peak hold function is canceled by rotating the motor 15 in the reverse direction.

The tension value calculated by the first microcomputer 7a is sent to the second microcomputer 7b of the remote control body 17, and the chain winding mechanism section 7 at that time is sent.
Depending on whether the rated tension of No. 2 is for 1.5 tons but for three tons, the operator switches the toe changeover switch 200 in advance and when it is for 1.5 tons, the first data table 10
Based on 0, the ton display is displayed in a bar graph on the second display portion 19b, and when the amount is 3 tons, the second data table 10 is displayed.
Based on 1, the ton display is displayed on the second display unit 19b in the form of a bar graph. The motor current value data 20a
Is directly sent to the second microcomputer 7b and is subjected to arithmetic processing, and the second display unit 19 displays the tension value in tonnes.
It can also be displayed on b.

[0031]

The tension display method for a towing machine according to the present invention comprises:
Since it is configured as described above, the following effects can be obtained. That is, the tension of the chain can be obtained from the motor current value and the tension can be displayed in the form of a bar graph as a ton display, and unlike the conventional manual traction machine using a lever hoist, a great reduction in labor and efficiency can be achieved. be able to.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a towing machine according to the present invention.

FIG. 2 is a configuration diagram showing a main part of a remote control body.

FIG. 3 is a configuration diagram showing a specific example of the towing machine of FIG.

FIG. 4 is a configuration diagram showing a main part of FIG.

5 is a right side view of FIG. 4. FIG.

FIG. 6 is a configuration diagram showing a main part of FIG.

7 is a state of use of the towing machine of FIG.

FIG. 8 is a usage state diagram showing a conventional towing machine.

[Explanation of symbols]

 10 Motor Drive Section 15 Motor 17 Remote Control Body 19b Second Display Section 20a Motor Current Value Data 22 Reducer 30 Chain 32 Sprocket

Claims (1)

[Claims] 1. A tractor in which a chain (30) is moved by rotating a sprocket (32) via a motor (15) driven by an electric drive (10) and a speed reducer (22), Motor current value data obtained by the electric drive (10)
The second display portion (19b) of the remote control body (17) based on (20a)
The tension of the chain (30) at multiple display segments (S
1 to Sn) is used to display tons in a bar graph shape, and a tension display method for a towing machine.