JPH01145082A - Rope pulling driver - Google Patents

Abstract

PURPOSE: To realize the actual status of a tug of war by providing a control unit to control the tractive force and the tractive speed of a tractive force generating means, based on the output of a pattern signal generator and the output of a judging unit. CONSTITUTION: A pattern signal generator 6 which outputs a pattern signal in order to vary the tractive force and the tractive speed of a rope 5 for tag of war, by a set cycle, is provided. A tension detector 72 to detect the tension of the rope 5, is provided, and a judging unit 7 which indicates the winding, letting off or the stopping of the rope 5, by comparing a previously set tension level and the output of the tension detector 72, is provided. Based on the output of the pattern signal generator 6 and the output of the judging unit 7, the rope tractive force and the tractive speed of a tractive force generating means 2, are controlled by a control unit 3. As a result, a cyclic variation pattern of the tension is generated, and at the same time, the rope is taken up or let off by generating a different tractive force in response to the tension applied to the rope 5, and by doing so, the actual status of a tug of war can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a tug-of-war drive device, and more particularly to a tug-of-war drive device that controls traction force using pattern signals and generates different traction forces depending on tension.

[Technical Background of the Invention] In the past, tug-of-war competitions were generally held at sports days, etc., but recently, tug-of-war competitions have been held regularly for the purpose of increasing physical strength, aVJ, etc. Therefore, it is desired to develop a device that allows an unspecified number of people to easily practice tug of war.

One possible example of such a tug-of-war training machine is one in which a rope is wound around a drum connected to a motor to generate traction, and the practitioner pulls the rope.

This training machine is equipped with a drum that winds up or lets out a rope for tug-of-war, and a motor that rotates the drum to apply traction to the net, and is used to practice tug-of-war by setting the tension. .

[Problems with Background Art] However, this technique has the following drawbacks.

In other words, if the traction force of the motor is greater than the traction force of the practitioner, the rope will be wound around the drum unilaterally, and conversely, if the traction force of the motor is smaller than that of the practitioner, the rope will be unwound unilaterally. Therefore, it is not possible to realize a situation where the rope is pulled and the rope is pulled in the opposite direction as in an actual tug-of-war competition.

[Object of the Invention] The present invention has been made in view of the above-mentioned conventional difficulties, and it is an object of the present invention to provide a tug-of-war drive device that can realize the actual tug-of-war situation, that is, the movement of pulling or being pulled. It is.

[Summary of the Invention] In order to achieve such an object, the tug-of-war drive device of the present invention includes a traction force generating means for winding up or letting out a rope for tug-of-war, and a device for varying the traction force and traction speed of the net at a set cycle. a pattern signal generator that outputs a pattern signal; a tension detector that detects the tension of the net; and winding of the net by comparing the output of the tension detector with a preset tension level; The apparatus includes a determining section that instructs to extend or stop, and a control section that controls the traction force and traction speed of the traction force generating means based on the output of the pattern signal generator and the output of the determining section.

[Embodiments of the invention] Preferred embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the tug-of-war drive device l of the present invention includes a motor 2 as a traction force generating means for winding up or letting out a tug-of-war rope 5, and a pattern signal for varying the traction force and traction speed of wI 5 at a set cycle. A pattern signal generator 6 to output, a load cell 72 as a tension detector that detects the tension of [5], and a preset tension level and the output of the tension detector 72 are compared to wind up w45. It is equipped with a determining section 7 that instructs to extend or stop, and a control section 3 that controls the traction force and traction speed of the traction force generating means based on the output of the pattern signal generator and the output of the determining section.

The motor 2 drives the drum 4 and the line 5 is wound onto or unwound from the drum 4.

The pattern signal generator 6 sends the pattern signal to the amplifier A2 in the judgment section 7, and! The traction force and traction speed of No. 15 are varied at set intervals.

The judgment unit 7 includes an amplifier A1-A4, variable resistors VR2, V
H2, comparator 70, tension setting device 71, switch SW%K
l, has 2, K3. Amplifier A2 amplifies the signal from pattern signal generator 6 and outputs it to integrator A5 via switch SW.

Switch SW is switched in conjunction with switch 2. The amplifier A1 is connected to the power of the amplifier A2, the output of the amplifier A2 is connected to the contact side of the switch SW, and the common terminal of the switch SW is connected to the integrator A5.

Variable resistor VR2 is connected to the gain terminal of amplifier A2. The output of amplifier A3 is the human power of amplifier A4, and the output of amplifier A4 is
The output of is connected to one of the contacts of switch SW. Variable resistor VR4 is connected to the input of amplifier A4. Ground E is connected to one of the contacts of switch SW via switch 2 and K3.

The outputs of the load cell 72 as a tension detector and the tension setting device 71 are input to a comparator 70 .

The outputs A and B of the comparator 70 are 1 and K2 to the switches, respectively.
The electric current R is supplied via the drive unit (2 is shown circled in K1.).
V+, and the output C is connected to the voltage RV+ via the contacts of the switch Kl and the drive at switch 3 (K3 is shown circled).

The drive unit 3 on the switch is applied to ground E via the contact 3 on the switch.

The signal from the load cell 72 is amplified and input to the comparator 72 as an output S (S is shown with a circle). The aforementioned outputs A, B, and C are obtained by comparing the output S with a tension value preset by the tension setting device 71. Further, the output S is applied to the amplifier A3 and the amplifier A1 as the human power.

Here, between the outputs A, B, and C of the comparator 70, A≦B5
There is an intermediary called C.

The control section 3 includes a drive amplifier AO, an amplifier AO1, and a variable resistor VR3, and controls the traction force and traction speed of the traction force generating means based on the output of the pattern signal generator and the output of the determination section.

Drive amplifier AO in control section 3 is connected to integrator A5, and the output of drive amplifier AO is connected to motor 2. Amplifier AOI feeds back the output of motor 2 to drive amplifier AO.

[Operation of the Invention] In the tug-of-war drive device 1 configured as described above, the pattern signal generator 6 generates a pattern signal, for example, a square wave with a duty of 50%, at a period set by the variable resistor VRI. The output pattern signal passes through the switch SW, is shaped into a smooth sinusoidal waveform by the integrator A5, and is manually inputted to the drive amplifier AO in the control section 3 as a winding command for the drum 4.

The signal of the output S passes through the amplifier AI and is subtracted by the amplifier A2. Note that the variable resistor VR2 is used to adjust the rotational speed of the motor 20.

The function of applying different tractive forces to the rope 5 depending on the tension is provided by the comparator 70, switches SW, Kl, 2, K3 and amplifier A.
This is realized by I, A2, A3, and A4.

In FIG. 2, which shows the relationship between motor tension and rotation angle, the dead zone is from point A (70%) to point 0 (100%). When the tension increases along arrow 1 and reaches point B, a stop command is output to the drive amplifier AO, and the motor 2 maintains the stopped state (arrow 2). When the tension further increases along arrow 3 and reaches the 0 point, a reverse rotation command is output to the drive amplifier AO, causing the motor 2 to rotate in the opposite direction (arrow 7).
The rope is let out. When the tension is large, the signal S is sent to amplifier A3.
The rate added to the amplifier A4 increases through the wire, and the rope payout speed increases (arrow 5.6), the reversal speed of the motor can be adjusted with the variable resistor VR4. on the other hand,
When the tension decreases and reaches point A, motor 2 rotates forward and rope 5
Start winding up (arrow 8).

Here, since the rotation direction of the motor 2 is determined by the feedback of the detected tension, there is no error due to the influence of losses in the rotation system such as frictional resistance between the motor 2 and the drum 4. Furthermore, the variable resistance VR3 is the motor's rotation direction. This is for adjusting the drive current.

In this way, a periodic tension fluctuation pattern is achieved, and a fuwazai (range of 70% to 100%) is set.
By generating different traction forces depending on the tension and winding or letting out the rope, it is possible to create a realistic tug-of-war situation, that is, a realistic movement of pulling the rope or being pulled.

Note that since the set values A, B, and/or C can be set arbitrarily, the value of the tension at which the rotation is reversed can also be set arbitrarily.

Since the amount of movement of B45 can be monitored, victory or defeat can be easily determined.

It is also possible to make the entire control system contactless using semiconductor elements such as transistors. In addition, any other pattern can be generated by controlling the pattern signal generator 6 with a microcomputer or the like.

[Effects of the Invention] As is clear from the above embodiments, the tug-of-war drive device of the present invention suppresses periodic tension fluctuations by combining a pattern signal generator, a tension detector, an auxiliary control unit, etc. In addition to generating a pattern, it detects the tension applied to the rope and generates different traction forces depending on the level, and reels or lets out the rope, thereby realizing the actual tug-of-war situation, that is, the action of pulling the rope and being pulled. can do.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the tug-of-war drive device according to the present invention, and FIG. 2 is a graph showing the relationship between tension and motor rotation in the tug-of-war drive device. 290. Traction force generating means (motor) 316. Control unit 419. Traction force generating means (drum) 5... rope 601. Pattern signal generator 7139 Judgment unit 72, Tension detector (load cell) Agent Patent attorney Moritani -Yu

Claims (1)

[Claims] A traction force generating means for winding up or letting out a rope for tug-of-war; a pattern signal generator for outputting a pattern signal for varying the traction force and traction speed of the rope at a set cycle;
a tension detector that detects the tension of the rope, and a determination unit that compares the output of the tension detector with a preset tension level and instructs the rope to be retracted, let out, or stopped;
A tug-of-war drive device comprising: a control section that controls the traction force and traction speed of the traction force generation means based on the output of the pattern signal generator and the output of the determination section.