JPS63103931A - Tension gauge - Google Patents

Abstract

PURPOSE:To measure a find load - a considerably large load continuously with high accuracy by arranging force detectors which differ load measurement range successively to that their directions of load application are different, and fitting rollers to the detectors. CONSTITUTION:A force detector 2 which utilizes a strain gauge consists of a large load cell 2a and a small load cell 2b and provided successively in a case main body 1. Rollers 3 and 4 for making the direction of loads applied thereto different are fitted to the load cells 2a and 2b. Idle rollers 6 and 7 are provided in front of the roller 3 and behind the roller 4, and a measurement roller 8 for speed and length measurement where a rotary encoder 9 is fitted detachably is provided further behind the idle roller 7. A wire 13 to be measured is provided along the idle roller 6, roller 3, roller 4, idle roller 7, and roller 8. Consequently, the measured value of a load placed on the wire 13 can be expanded to about twice the measurement width that the tension gauge has.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a tension gauge that can accurately measure a wide range of tension applied to a fishing line, for example, by using at least two force detectors with different measurement ranges. It is.

[Conventional technology]

Tension gauges can be classified into three types, mechanical tension gauges, optical tension gauges, and electrical tension gauges, depending on the type and structure of the built-in force detector, and each of these tension gauges is used differently depending on the purpose and application. The reality is that

Most of the conventional tension gauges are constructed with a single force detector, so that the measurement load width is limited to a very narrow range. Therefore, for example, the tension applied to a force detector such as the tension applied to a fishing line which is the object of the present invention, that is, the load varies greatly, such as from a very weak tension load to a considerably strong tension load. When measuring force, it is impossible to measure accurately using a tension gauge with a built-in force detector. Therefore, to measure the tension load when the tension load fluctuates significantly as mentioned above, prepare multiple tension gauges with different measurement load ranges, replace these tension gauges one after another, and measure the purpose of the measurement. I was trying to achieve this.

Therefore, for example, when attached to a fishing rod, the tension load can be measured in cases where the measured load width varies over a wide range, from a weak tension load to a fairly strong tension load applied to a reel for reeling in and reeling in a fishing line. In the tension gauge with the above configuration,
When measuring, it is necessary to prepare two tension gauges, one for measuring weak tension loads and one for measuring strong tension loads, and two tension gauges are required. Even if a tension e-gauge is prepared, it is impossible to replace both tension e-gauges in a timely manner when measuring a tension load where a weak tension load and a strong tension load occur consecutively and randomly. As a result, there was a drawback in that it was impossible to accurately measure such widely varying tension loads.

Also, if you ignore measurement accuracy and measure a predetermined tension load using two tension gauges, you will need to prepare at least two force detectors. The drawback was that the cost was very high.

[Means and effects for solving the problems] The present invention has been made to improve the above problems, and includes force detectors with different load measurement ranges arranged in parallel in different directions of load application. By attaching rollers to the force detector and configuring the wire for tension measurement to be movably attached to each of these rollers, the measurement range of the load applied to the wire for tension measurement can be widened. The purpose of the present invention is to provide a tension gauge that can continuously measure from a weak load to a fairly strong load applied to a wire to be measured with high precision, and can be done at a low cost. .

〔Example〕

1 to 3 are explanatory diagrams of one embodiment of a tension gauge according to the present invention.

In the figure, 1 is a case body, 1a is a lid that closes the opening of the case body 1, and 2 is a force detector using, for example, a strain gauge. In this example, a lever type load cell with a maximum load of 50 kgf max, overload of 200% + wax, and accuracy of ±1% FS is used) 2a and a small load load cell (in this example, a minimum load of 3000 gf max, overload and overload of 2.0 l is used) 2b are arranged in parallel. 3 is a roller attached to the large load load cell 2a, and 4 is a roller attached to the small load load cell 2b.
Reference numeral 5 denotes a stopper disposed near the small-load load cell 2b in the bending direction, and this stopper 5 is attached so that its approach to the small-load load cell 2b can be adjusted. 6 is an idle roller placed in front of the roller 3 attached to the large load load cell 2a, and 7 is an idle roller placed behind the small load load cell 2b. Reference numeral 8 denotes a measuring roller disposed further behind the idle roller 7 for measuring speed and length, and on one side of the rotating shaft of the measuring roller 8 is a case body 1.
A small rotary encoder 9, which protrudes from the side of the measuring roller 8 and converts the rotation of the measuring roller 8 into a predetermined pulse signal and outputs the signal, is removably attached (see FIG. 3).

Reference numeral 10 denotes a pressing roller that is brought into contact with the measuring roller 8, and this pressing roller 10 is attached to the tip of a rotating piece 12 that is urged toward the measuring roller 8 by a spring 11. Reference numeral 13 denotes a tension measuring wire (a fishing line is used in this embodiment) attached along the idle roller 6, roller 3, roller 4, idle roller rough, and measuring roller 8. 14 and 15 are guide holes for inserting the wire 13 into and out of the case body 1. 16 is a fixing part provided on one side of the case body 1, 17 is a tool insertion hole for adjusting the large load load cell 2a, and 1B is a gauge resistor for load detection (in this example, a pre-Fuji type strain gauge resistor of 350Ω). ), 19
is a circuit for sending a signal detected by the gauge resistor 18 to a tension load processing device to be described later.

FIG. 4 shows a tension load processing device for digitally displaying the tension run load detection signal of the wire 13 detected by the tension gauge and the speed, length, etc. of the wire 13 detected by the rotary encoder 9 on, for example, an LCD. FIG. 2 is a schematic configuration explanatory diagram.

In the same figure, 20.21 is for amplifying the signal (tension load signal) detected by both load cells 2a and 2b to a predetermined signal range (voltage, etc.) when supplying it to the A/D converter 23 at the next stage. Load cell amplifier 24 is the signal detected by the rotary encoder 9 (wire 1
3 speed, length, etc.) and tension load processing device.
An encoder amplifier 27 is used to amplify the ON-OFF signal from the start/stop circuit 25 to the I10 device 26 at the next stage to a predetermined signal range (voltage, etc.). An information processing device (in this example, an 8085 type c
pU) and is composed of ROM28 and RAM29. 30 is a battery (6vlOAH is used in this example), 31 is a power supply (AClo in this example)
oV.

32 is a host computer (in this embodiment, a hand belt computer is used), 33 is an LCD for displaying data, and 34 is for reading predetermined data based on the instructions from the host computer 32. A D/A converter 35 for transferring predetermined data stored in the RAM 29 of the information processing device 27 to a data processing device other than the host computer 320. This is a storage device (a 3.5-inch floppy disk is used in this embodiment) for storing information based on instructions.

Hereinafter, the operation of the tension gauge according to the present invention will be explained based on the above embodiments.

That is, the tension gauge with the above configuration is a force detector 2 with a different load measurement range, that is, a large load load cell (in this example, the maximum load is 50 + rf max s overload 2).
00%ll1ax, accuracy ±1%FS) 2a and small load load cell (minimum load 3000gf1w in this example)
ax, overload 200% la Since the wire 13 for tension measurement is attached to the wire 4, it is configured to be able to run.
The measurement width of the load applied to the wire 13 for tension measurement can be expanded to approximately twice the measurement width of a conventional tension gauge. Therefore, it is possible to continuously and highly accurately measure from a weak load to a considerably strong load applied to the wire 13 for tension measurement, and all of the measurements are performed completely automatically. , measurement and handling are very simple and can be done accurately and quickly.

A stopper 5 is disposed near the bending direction of the small load load cell 2b to prevent the deflection angle of the small load cell 2b from being excessively deflected.
It is possible to measure a predetermined tension load extremely stably and with high accuracy without applying any load that would damage b.

In addition, by using the above-mentioned tension gauge together with the above-mentioned tension load processing device, it becomes possible to measure the detected data with very high precision and quickly.
.

〔Effect of the invention〕

As described in detail above, the present invention includes force detectors with different load measurement ranges arranged in parallel in different directions of load application, and rollers attached to the force detectors, each of which is used to measure the tension. By configuring the wire so that it can run, the measurement range of the load applied to the wire for tension measurement is widened, and the load applied to the wire for tension measurement from a weak load to a considerably strong load can be continuously applied to the wire for tension measurement. Moreover, since the tension gauge can measure with high accuracy and has an extremely simple configuration, it is possible to provide a tension gauge that is extremely easy to manufacture and assemble and can be implemented at low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the tension gauge according to the present invention, FIG. 2 is a plan view of the tension gauge, FIG. 3 is a side view of the tension gauge, and FIG. FIG. 2 is a schematic explanatory diagram of a tension measuring device. DESCRIPTION OF SYMBOLS 1... Case body, 1a... Lid body, 2... Force detector, 2a... Large load load cell, 2b... Small load load cell, 3.4... Roller, 5... stopper,
6.7... Idle roller, 8... Measuring roller, 9
...Rotary encoder, 10...Roller, 11.
...Spring, 12...Rotating piece, 13...Wire (fishing line is used in this embodiment), 14.15...Guide hole, 16...Fixing part, 17...Tool insertion hole ,1
8... Gauge resistance for load detection, 19... Signal sending circuit.

Claims (4)

[Claims] (1) Force detectors with different load measurement ranges are arranged in parallel with different operating directions, rollers are attached to the force detectors, and wires to be measured for tension are attached to each of these rollers in a movable manner. Features a tension gauge. (2) The tension gauge according to claim 1, wherein a lever type load cell is used as the force detector. (3) A patent claim characterized in that the order in which the force detectors are arranged in parallel is such that the force detector having a large load measurement range is located at the front with respect to the running direction of the wire for tension measurement. The tension gauge described in item 1. (4) The deflection angle of at least one of the force detectors having a small load measurement range is limited by a stopper disposed near the force detector in the deflection direction. The tension gauge described in item 1.