JP2517852Y2 - Fabric tensile tester - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tensile tester for examining the stretchability of cloth and similar sheets.

[0002]

2. Description of the Related Art Conventionally, as a tensile tester for stretching characteristics test at the development stage of fabrics used for clothes and quality control at the production stage, a uniaxial tensile force is applied to the fabrics. Various test equipments are available on the market and widely used.

[0003]

[Problems to be Solved by the Invention] By the way, in the case of designing and manufacturing fabrics having appropriate stretchability in multiple directions in order to provide clothes that are comfortable to wear, the fabrics are simultaneously subjected to the multi-directions. There is a demand to investigate tensile properties and elongation properties by applying tensile force. For such requests,
With the above-mentioned uniaxial tester, even if the direction of the sample fabric is changed and the test is repeated several times, the load application condition is different from the case where tensile load is applied from multiple directions at the same time Can't look up,
In addition, workability also deteriorates.

Recently, in order to meet the above-mentioned requirements, a multi-directional tensile test device for applying tensile loads to fabrics from multiple directions is being developed, but a conventional multi-directional tensile test device of this type and a test by the same are performed. The method was complicated in its mechanism, and was complicated and inefficient to operate.

In view of the above circumstances, the present invention can apply tensile loads to fabrics from multiple directions to accurately check the expansion and contraction characteristics, and moreover, adjust the tensile load and measure the expansion and contraction characteristics easily and efficiently. In addition, a constant load test to check the elongation while controlling the load applied to the fabric to be the set value and a constant elongation test to check the load while controlling the elongation of the fabric to be the set value. The present invention provides a tensile test device for fabrics, which can selectively perform the above-mentioned tests and can perform an effective test according to the type of fabric, the use, and the like.

[0006]

SUMMARY OF THE INVENTION A fabric tensile tester according to the present invention comprises a plurality of sample fastening members having fastening portions for the peripheral portion of a sheet-shaped sample such as fabric, and these sample fastening devices. A fastening member holding portion that movably holds each sample fastening member via a ball screw in a direction of each axis in a state where the member is positioned on a plurality of radial axes centered on one point on the sample table, A plurality of drive shafts corresponding to the arrangement of the sample fastening member and a motor for rotating each drive shaft,
Drive means arranged below the sample table, transmission means for transmitting the rotation of the drive shaft to the ball screw of the fastening member holding section, and detection of sample elongation corresponding to the amount of movement of the sample fastening member Elongation detection means, load detection means for detecting the tensile load applied to the sample by the sample fastening member, and the detection signal of each of the detection means is input, and the detected value of the tensile load becomes a set value. Until the constant force test control for controlling the driving means so as to move the respective sample fastening members and the drive so as to move the respective sample fastening members until the detected value of the elongation reaches a set value. Control means for selectively performing constant elongation test control for controlling the means in response to a command, and detection of the elongation detection means when the constant load test control is performed corresponding to the control by the control means. signal Further, when the control for the constant extension test is performed, an arithmetic processing means for reading the detection signal of the load detecting means and creating detection data based on the read detection signal, and data output from the arithmetic processing means And display means for displaying.

[0007]

According to the above-mentioned tensile tester, a test is carried out to examine the expansion / contraction characteristics in each axial direction when tensile forces are applied in multiple directions. Data is created and displayed automatically. In addition, a constant load test that checks the elongation while controlling the load applied to the fabrics to the set value and a constant elongation test that checks the load while controlling the elongation of the fabrics to the set value are selectively performed. It becomes possible to do it. Further, the sample fastening member and the fastening member holding portion are arranged on the sample table, while the driving means such as the drive shaft and the motor are arranged below the sample table. Compared with the case where the sample is set, the motor and the like do not interfere with the work when setting the sample on the sample table, and it is not necessary to take a space for disposing the motor and the like above the sample table.

[0008]

1 to 5 show an embodiment of the test apparatus of the present invention. In these figures, 1 is a flat plate-shaped sample stand provided on the upper end of the base frame 2, and 3 is a plurality of sample fastening members arranged in the peripheral portion of the sample stand 1, and the respective sample fastening members are shown. 3 is located on a plurality of radial axes centered on a point in the center of the sample table 1, and is movable in the directions of the respective axes.
In the present embodiment, the sample table 1 is formed in a substantially octagonal shape, and the sample fastening members 3 are arranged on both sides in the four axial directions (shown by the one-dot chain line in FIG. 2) passing through the center thereof. In other words, the two located on both sides of the same axis are set as a set 4
A set (8 pieces) of sample fastening members 3 are provided.

Each of the sample fastening members 3 has a fastening portion 4 for a peripheral portion of a sheet-like sample A such as a cloth, and a nut portion 5 which is screwed into a ball screw 6. A load cell 7 as a load detecting means is incorporated between 5 and the fastening portion 4. As shown in FIG. 3, for example, the fastening portion 4 has a large number of needles protruding from the upper surface, and the needles are pierced through the peripheral portion of the sample A to be fastened. In order to ensure safety, it is desirable to cover a portion of the needle protruding above the sample A in a fixed state with a suitable cover. Alternatively, as shown in FIG. 4, a vertically rotatable plate 4a having a large number of needles projecting from the lower surface and a receiving plate 4b located below the plate 4a having needle insertion holes corresponding to the needles are provided between them. The fastening portion 4 may be configured to fasten the peripheral portion of the sample A, and in addition to this, the specific structure of the fastening portion 4 can be variously changed.

The ball screw 6 is mounted on the sample table 1
The bracket 8 is rotatably held by a bracket 8 provided in the. The ball screw 6 and the bracket 8 constitute a fastening member holding portion that movably holds the sample fastening member 3, and the nut portion 5 is displaced by the rotation of the ball screw 6 and the sample fastening member 3 Is designed to move.

Pulleys 9 and 9'are provided at the ends of the ball screw 6. Further, drive shafts 10 are arranged below the sample table 1 in the four axial directions, respectively, and the rotation of the drive shaft 10 is transmitted to the ball screw 6 via a transmission means such as a belt, so that each sample is rotated. The fastening member 3 is 1
Driven by respective drive shafts 10 in groups, and
The ball screws 6 and the drive shaft 10 on both sides of the same shaft are adjusted so that the pair of the sample fastening members 3 move in opposite directions with the rotation of the drive shaft 10 and the distance therebetween changes.
And are linked. In order to move the sample fastening member 3 in this way, for example, as shown in FIG. 5, the pulley 9 of one ball screw 6 is attached to the pulley 11 provided on one end side of the drive shaft 10 via the belts 12a and 12b. The drive shaft 10 is connected to the other end of the drive shaft 10 via the gears 12c and 12d, the pulley 12e, and the belt 12f, and the pulley 9'of the other ball screw 6 is connected to the drive shaft 10. It suffices that the ball screws 6 on both upper sides rotate in mutually opposite directions. Alternatively, the screws of the ball screws 6 on both sides may be set in opposite directions to rotate them in the same direction.

Each of the drive shafts 10 is driven by a motor 13 via a speed reducer 14, as shown in FIG. A drive means for the sample fastening member 3 is constituted by these.

An intermediate pulley 15 is provided in the belt transmission mechanism between the ball screw 6 and the drive shaft 10 for at least one of each of the four sets of the sample fastening members 3, and the pulley 15 and An encoder 16 is provided coaxially as an extension detecting means for detecting the extension of the sample A. The encoder 16 converts the rotation angle of the pulley 15 into a digital signal, and detects the movement amount of the sample fastening member 3 by converting this.

The control means 20 for the drive means and the arithmetic processing means 30 for creating the expansion / contraction characteristic data are as shown in FIG. 5, for example. That is, the control means 20 includes a load setter 21 that gives a set value of the load applied to the sample A, an elongation setter 22 that gives a set value of the elongation of the sample A, and a motor controller 23. Load detection signal sent from the load cell 7 via the load cell amplifier 17, the encoder 16 to the counter unit 1
Elongation detection signal sent via 8 and the setting device 2
The signals from 1 and 22 are input to the motor control unit 23. The motor control unit 23 compares one of the load detection signal and the extension detection signal with a set value, and the servo amplifier 24 adjusts the detected value to the set value.
The motor 13 is controlled through a constant load test for checking the elongation while controlling the load to a set value, and a constant elongation test for checking the load while controlling the load to be a set value. It is also applicable in the case of. That is, the control means 20 controls each of the sample fastening members 3 until the detected value of the tensile load reaches a set value in response to a command about the test method given from the operation section 36 via the arithmetic processing means 30. Constant load test control for controlling the motor 13 to move, and constant elongation test for controlling the motor 13 to move each sample fastening member 3 to a state where the detected value of elongation reaches a set value. Control is selectively performed.

The arithmetic processing means 30 includes a mode switching section 3
1, interface 32, A / D converter 33, PIO3
4 and CPU 35. Then, the load detection signal and the elongation detection signal are input, and the CPU 35 calculates a detection value based on the elongation detection signal (in the constant load test) or the load detection signal (in the constant extension test) to create the data. In addition, communication with the motor control unit 23 and selection of a test method and a display method according to a signal from the operation unit 36 such as a keyboard are performed. The mode switching unit 31 switches the processing mode, such as stopping reading the detected value in some cases.

The data created by the CPU 35 is output to the display section 40. The display unit 40 includes a CRT 41 and a printer 42, and the display by the CRT 41 and the display by the printer 42 can be arbitrarily selected.

An example of the tensile test method performed by such a tensile test apparatus will be described below.

In the tensile test, first, as a preparatory work, a sample A such as cloth is fixed on the sample table 1 and the peripheral portions thereof are fixed to the sample fixing members 3 (see FIG. 1). At this time, since the driving means such as the drive shafts 10 and the motor 13 are arranged below the sample table 1, the preparatory work can be easily performed without disturbing the preparatory work.

After the preparatory work, the motor 13 is driven by the control means 20 in accordance with the program, and the arithmetic processing means 30 carries out processing such as commands to the control means 20, initial setting and subsequent calculation of detected values, and data creation. As a result, the process of measuring the relationship between the elongation of Sample A and the tensile load is automatically performed. A specific example of this processing will be described in the case of a constant load test. In the motor control section 23, a comparison between a load detection signal given from the load cell 7 via the load cell amplifier 17 and a signal from the load setter 21 is performed. Based on the feedback control that drives the motor 13 based on the above, each sample fastening member 3 is moved to a state where the tensile load applied in each direction of the sample A reaches a set value, and then the tensile load becomes a constant initial load. A process of returning each sample fastening member 3 and repeating such an operation a predetermined number of times (for example, three times) is performed according to an instruction from the CPU 35. On the other hand, while such control is being performed, the CPU 35 creates expansion / contraction characteristic data based on the expansion detection signal provided from the encoder 16 via the counter unit 18, and outputs it to the display means 40.

FIG. 6 is a flowchart showing such processing.

That is, when the program of the arithmetic processing is started, first, the motor 13 is driven in the forward rotation direction (step S ₁ ), whereby the sample fastening member 3 is pulled in the pulling direction.
To move. Then, as an initial setting for eliminating the variation in the initial state, it is checked whether or not a certain initial load is applied (step S ₂ ), and from the time when the initial load is applied, the elongation detection signal is detected. to start the calculation of the elongation of the specimen a based on (step S _3). Moreover, until the tensile load reaches the set load continue to drive the motor 13 in the forward direction (step S _4, S _5). If the set load, performs an operation of moving the sample fastening member 3 in the return direction by driving the motor 13 in the reverse direction, until the return completion (step S _6, S _7). During the processing of such steps S ₄ to S ₇ have been made, the calculation of elongation based on the elongation detection signal is performed sequentially.

Then, the above-described motor drive in the forward rotation direction and the subsequent motor drive in the reverse rotation direction are repeated a predetermined number of times (for example, three times) based on the determination in step S ₈ , and then the calculated elongation is calculated. The data is output to the display means 40 (step S ₉ ) and the measurement is completed.

There are various possible ways of displaying by the display means 40, and some examples of the way of displaying by the CRT 41 are shown in FIGS. 7 to 9. In the example shown in FIG. 7, the elongation of the sample A at the set loads from the first time to the third time is represented by a line graph for each direction of the four axes. The elongation (recovery characteristic) when returning to the initial load may be similarly expressed. In the example shown in FIG. 8, the elongation sequentially examined during the control operation is represented as a continuous curve for each direction. The elongation of the sample A may be expressed by the length (mm) as shown in FIG. 8, or as shown in FIG. 7, the ratio of the elongation to the distance between the two fastening points (for example, 200 mm) in the standard state. It may be expressed by (%). Further, in the example shown in FIG. 9, for example, for the first time and the third time, the expansion in each direction is simultaneously shown in one figure.

In displaying, it is desirable to be able to arbitrarily select the above-described various display methods according to the operation of the operation unit 36. Further, instead of or in addition to the display by the CRT 41, the data is also output by the printer 42.

The process for measuring the relationship between the elongation and the tensile load of the sample A is not limited to the above-mentioned specific example. For example, the state in which the tensile load is set as the set load is maintained for a certain period of time and the change in the elongation during that period is examined. Methods such as the above can also be adopted. Although the constant load test has been described in the above specific example, in the case of the constant elongation test, the motor 13 is controlled so that the elongation becomes the set value based on the comparison between the elongation detection signal and the signal from the elongation setter 22, If the load is calculated according to the load detection signal during control, the expansion / contraction characteristics can be examined in the same manner as in the constant load test.

Since the constant load test and the constant elongation test can be selectively performed as described above, for example, when it is predicted how much load will be applied to the fabrics during use. Conducts a constant load test, and if the amount of elongation of the fabrics during use is predicted, conducts a constant elongation test. Select the test method according to the type and use of the fabric to be sample A. Good.

The elongation characteristics and the recovery characteristics thus examined are used for process control, fabric management, etc. That is, in the process control, data such as elongation properties are compared with standard characteristics to check the quality of the product, For management, the dimensions may be adjusted for use in clothes and the like according to the elongation characteristics and the like.

[0028]

As described above, in the tensile test apparatus of the present invention, the sample fastening members are movably arranged on a plurality of radial axes in the directions of the respective axes, and the sample fastening members are driven to move. Means, elongation detection means, load detection means, control means for controlling the drive means, arithmetic processing means, and display means, and the control means controls the drive means in multiple directions on the sample. While the tensile force is applied, the arithmetic processing means stretches the data, and since the data of the expansion and contraction characteristics of the sample is created based on the detection of the load, it is possible to apply the tensile force to the fabrics in multiple directions. The expansion and contraction characteristics can be accurately investigated, and this test can be performed easily and efficiently. Moreover, in particular, for a constant load test in which the load applied to the sample and the elongation are respectively detected by the respective detection means, and the respective sample fastening members are moved by the control means until the detected value of the tensile load reaches a set value. The control and the constant elongation test control for moving the respective sample fastening members to the state where the detected value of the elongation reaches the set value are selectively performed, and the constant load test and the constant elongation test are performed by the arithmetic processing means. Since the data is created based on the elongation detection signal or the load detection signal depending on the case, it is possible to select the constant load test and the constant elongation test, depending on the type of fabric, application, etc. It is possible to obtain effective stretch characteristic data. Further, since the driving means including the drive shaft and the motor for moving the sample fastening member is arranged below the sample stage, the preparation work for fastening the sample to the sample fastening member on the sample stage can be performed. In this case, the driving means does not interfere with the operation, the preparation work can be easily performed, and the apparatus can be made compact.

[Brief description of drawings]

FIG. 1 is a perspective view of a tensile test apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of the tensile test device.

FIG. 3 is an enlarged side view of a sample fastening portion.

FIG. 4 is an enlarged partial cross-sectional side view showing another example of the structure of the fastening portion for the sample.

FIG. 5 is a structural explanatory view of the entire apparatus.

FIG. 6 is a flowchart showing a specific example of calculation processing in the tensile test method.

FIG. 7 is a diagram showing an example of a display method by a display unit.

FIG. 8 is a diagram showing another example of the display method by the display means.

FIG. 9 is a diagram showing still another example of a display method by the display means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 sample stand 3 sample fixing member 4 fixing part 6 ball screw 7 load cell 13 motor 16 encoder 20 control means 30 arithmetic processing means 40 display means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-47-16186 (JP, A) JP-A-61-200442 (JP, A) JP-A-59-216035 (JP, A) Actual development Sho-62- 189645 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A plurality of sample fastening members each having a fastening portion for a peripheral portion of a sheet-shaped sample such as cloth, and a plurality of radial axes about these sample fastening members centered on one point on a sample table. Balls in the direction of each axis when positioned above
A fastening member holding portion that movably holds each sample fastening member via a screw, and a drive shaft in a plurality of axial directions corresponding to the arrangement of the sample fastening members.
And a motor for rotating each drive shaft,
The drive means disposed below the drive shaft and the rotation of the drive shaft to rotate the ball screen of the fastening member holding portion.
Transmission means for transmitting to the user, elongation detecting means for detecting elongation of the sample corresponding to the movement amount of the sample fastening member, load detecting means for detecting a tensile load applied to the sample by the sample fastening member, By inputting the detection signal of each detecting means, the constant load test control for controlling the driving means so as to move the respective sample fastening members until the detected value of the tensile load becomes a set value and the elongation Control means for selectively performing a constant elongation test control for controlling the driving means so as to move the respective sample fastening members to a state where the detected value reaches the set value, and the control means. In response to the control, the detection signal of the elongation detecting means is read when the constant load test control is performed, and the detection signal of the load detecting means is read when the constant extension test control is performed. And arithmetic processing means for generating detection data based on the read detection signal, the tensile testing apparatus textile fabric, characterized in that a display means for displaying data outputted from the arithmetic processing means.