JPH028198Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is an automatic method for tensile testing of filamentous samples so that the filamentous samples are not cut at the chucked points but are broken at the center of the filamentous samples. This invention relates to a chuck device for a thread tension tester suitable for thread tension tests.

[Prior art] Generally, when you check and pull both ends of a material,
If unreasonable force is applied to the chucked part and a slight scratch occurs there, the specimen is often cut from that point, so it is difficult to perform a tensile test that requires the specimen to be cut (broken) at the center. I can't do it properly.

For this reason, conventionally, when performing a tensile test on a homogeneous material whose shape has not been specified, such as a metal material, the chuck portion must be It was common to process the metal material into a so-called dumbbell shape, which is thick and constricted at the center, and use this as a sample.

However, in the case of threads or thread-like materials that have a uniform cross-sectional shape that is specified from the beginning, it is not possible to process the material into such a dumbbell shape, so in most cases, The material of the clamping plate in the chuck (rubber, baked goods, etc.) was chosen to match the sample material, and the material was clamped using the holding force of friction.

In some cases, a thread-like sample is wrapped around a cylinder at 180 degrees, its ends are fixed with a chuck, and the tensile test is carried out by holding the thread-like sample mainly by the frictional force between the cylinder circumferential surface and the thread-like sample. I could see it.

[Problem to be solved by the invention] However, in the method of selecting the material of the clamping plate of the chuck part that is suitable for the filamentous sample, not only is the selection very complicated, but there are only a limited number of types of materials. , it is difficult to adapt it to all filamentous samples, and it is also difficult to wrap the filamentous sample around a cylinder.
In the method that utilizes the friction between the cylinder and the circumferential surface,
Both methods had drawbacks, such as the retention force due to friction fluctuating under the influence of humidity.

[Means for solving the problem] Therefore, the amount of wrapping of the filamentous sample 8 wound around the circumferential surface of the V-groove guide 11 and the clamping length of the thread sample 8 clamped by the chuck parts 17a and 17b, which can adjust the clamping force, can be varied. I made it possible to adjust it.

[Function] Frictional force between the filamentous sample 8 and the circumferential surface of the arcuate bottom portion 11a of the V-groove guide 11 and the chuck portion 17
Since the holding force is counteracted by the holding force according to the holding length at , the holding force can be adjusted without applying unreasonable force to the chuck part 17, and it is suitable for each filamentous sample 8. Then, it can be broken at the center.

[Example] Hereinafter, the present invention will be explained with reference to the drawings. In particular, FIG. 1 is a schematic explanatory diagram, and a part thereof shows the main part seen from the line 1-1 in FIGS. 2 and 6. Only shown.

In the figure, reference numeral 1 denotes a base, which has a built-in drive source (not shown). Reference numerals 2 and 3 denote feed screws, which are installed between the base 1 and the fixed base 4, and are configured to allow the movable base 5 to be moved up and down by a drive source (not shown) within the base 1.

Reference numeral 6 denotes a load cell (see FIGS. 1 and 2) for measuring tension, which is installed on the fixed table 4 and measures the tension of a filamentous sample 8 applied to a V-groove guide 11 (described later) via an upper connector 7. 9 is a motor fixed to the lower end of the upper connector 7, and a mounting boss 10 (second
), the V-groove guide 11 having the arc-shaped bottom 11a is fixed (FIG. 9), and the shaft 9a passing through the hole 11b of the V-groove guide 11 is connected to the center of the rotating connector 12. has been done.

13 is a thread hooking operation member, which is a main body portion 13a.
and a restriction plate 13c connected to a piston 13b, and is fixed to the rotating side connector 12 via a pipe 14 for sending compressed air.
The amount of rotation is controlled. 15
1 is a fixed side connector, which is connected to a rotatable rotating side connector 12 while keeping compressed air sent from a fixed pipe 16 (compression source omitted) confidentially with an O-ring (not shown).

Here, regarding the internal structure of the main hook operation member 13, as shown in FIG.
4 into the space 131, the piston 13b
moves to the left against the spring 132, and as a result, the restriction plate 13c guided by the pin 133 also moves to the left, and the locking pin 134 is partially inserted into the hole 135, loosening the filamentous sample 8. A restricted space 136 is formed for passage. In the figure, reference numeral 137 indicates an O-ring for maintaining confidentiality.

Reference numeral 17 denotes a chuck for holding the filamentous sample 8, and an L-shaped fixing portion 17a with a tightening surface 17aa on the same surface as the arcuate bottom portion 11a of the V-groove guide 11.
(Figs. 4 and 9) is fixed to a metal fitting 19 (Fig. 2) integrated with the upper connector 7 by screws 18, and the tightening surface 1
A moving part 17b facing 7aa is connected to a shaft 20a of a servo device 20 fixed to the motor 9, so that it can move forward and backward by the operation of the servo device 20, and when the moving part 17b advances, the filamentous sample 8 be sure to hold it securely. At this time, the tightening force can be adjusted by increasing or decreasing the forward force. Here, 21 is a disk, 2
2 is a sensor (FIG. 2), which allows the amount of rotation of the shaft 9a of the motor 9 to be detected and controlled. Further, 23 is a weight, which is used to balance the weight of various parts including the motor 9 and the like.

24 is a lower connector (Figs. 1 and 6), the lower end of which is fixed to the moving table 5, and various parts including a motor are attached to the upper part. Since its function is the same as that attached to the connector 7, parts that perform the same function will be indicated with the letter "D" suffixed as necessary, and the explanation will be omitted.

25 is the lower book hanging operation member (Figures 5 and 6)
It consists of a main body part 25a and a crimp plate 25c connected to a piston 25b, and the crimp plate 25c can be moved from side to side by compressed air sent from a pipe 14D to the main body part 25a, and can be moved to the left. In this case, the filamentous sample 8 in the space 25d is securely held between the main body portion 25a and the pressure bonding plate 25c, and this point forms a restricted space 136 in the upper book hanging operation member 13. However, its internal structure is almost the same as the upper book hanging operation member 13, so parts that have the same function and that seem to require explanation are marked with the letter "D". They are shown as subscripts.

Reference numeral 26 denotes a rotating arm (Figs. 1 and 7), which is adapted to rotate around a shaft 27, and has a provisional hanging operation member 28 having the same structure as the lower book hanging operation member 25 described above at the bottom of the tip. It is fixed, and compressed air is sent through the fixed side connector 29, the rotating side connector 30, and the pipe 31 to control the operation of the crimp plate 28c.

Reference numeral 32 denotes a lever (Fig. 1), on the front side of which shaft pins 32a, 32b, 32c and a guide pin 32d are set. 33 is an arm with a shaft pin 32a
It is rotatably attached to the
It has a roller 34 that rotates at a. Reference numeral 35 denotes a pressure bonding plate consisting of two discs (one of which cannot be seen at the bottom), which is inserted through the shaft pin 32b and is pushed in one direction by a spring (not shown). It is designed to hold the thread by lightly pinching it. 36 is a roller, which is attached to the shaft pin 32c. 37 is a spool for filamentous sample 8;
Both 38 and 39 are cutters, but 39 has flat parts 39a and 39b (Fig. 8),
The filament sample 8 can be pressed and held at the same time as cutting.

In such a configuration, when performing a tensile test on the filamentous sample 8, first manually pull out the filamentous sample 8 from the spool 37, and then attach the guide pin 32d,
It is hooked and held between two pressure bonding plates 35 via a roller 34 as shown by dotted lines.

Next, the rotary arm 26 is rotated in the direction of arrow A along a trajectory P shown by a two-dot chain line, and when it reaches the point P1 and picks up the filamentous sample 8 shown by the dotted line, it is compressed into the pipe 31 (FIG. 7). Send air to piston 2
The crimp plate 28c connected to the main body part 28a
If you hold the filamentous sample 8 by pulling it to the side and further rotate it in the direction of arrow A in this state, the filamentous sample 8 will move to point P.
At the point P3 position, the upper book hooking operation member 1, which is initially in this position, contacts the roller 36 at the point P3 position.
A bottleneck 136a formed by a locking pin 134 planted on the restriction plate 13c (outline shown by dotted lines) of No. 3
(Figs. 2 and 3) and comes into contact with the piston 13b, and at the point P4, the piston 25b of the lower book hooking operation member 25, which is also initially in this position.
(The crimp plate 25c is shown as a dotted line) and reaches the point P5 (the piston 28b of the temporary hanging operation member 28 and the crimp plate 28c are shown as a solid line), the rotation temporarily stops, and the filamentous sample 8 is shown as a dotted line. It is temporarily hung as shown.

At this time, compressed air is sent from the pipe 14D to the lower final hanging operation member 25, and the pressure bonding plate 25c is drawn to clamp the filamentous sample 8. At the same time, the compressed air is cut off to the temporary hanging operation member 28. The crimp plate 28c is pulled away and the filamentous sample 8 is released. Thereafter, the rotating arm 26 rotates to the initial position and stops.

Next, upper and lower motors 9 and 9D (Figures 2 and 6)
When the upper and lower book-hanging operation members 13 and 25 are rotated in the directions of arrows B and C to points Q1 and Q2 (Fig. 1), the tip of the filamentous sample 8 is moved by the lower book-hanging operation member 25. As a result, the filamentous sample 8 passes through the gaps 17c and 17Dc between the chucks 17 and 17D, and passes through the V-groove guides 11 and 17D.
11D circular arc bottom 11a, 11Da (6th, 9th
(Fig. 1), as shown by the solid line in Fig. 1.

Also, at this time, the thread-like sample 8 is prevented from loosening due to the winding direction behavior being given to the thread spool 37 by a means not shown, and the tension due to the self-weight of the roller 34, and the upper and lower servo devices 20 , 20D, the actuating portion 17b,
17Db moves forward and the respective fixed parts 17a,
17 Da, securely sandwich the filamentous sample 8,
Complete the book hanging operation.

In addition, as mentioned above, the upper and lower book hanging operation members 1
3 and 25 in the direction of arrows B and C, respectively, to points Q1 and Q.
If you do not rotate the sample up to 2 but stop at a point in the middle, for example at point 3, as shown in Figure 8, the filamentous sample 8
are introduced into chuck 17 at different angles of approach,
Since the amount of wrapping around the arcuate bottom portion 11a of the V-groove guide 11 and the holding length of the chuck 17 can be varied,
The holding force for the filamentous sample 8 can be adjusted.

In this state, when the drive source (not shown) of the base 1 is activated to move the movable base 5 downward and perform a pulling operation, the circumferential surfaces of the arc-shaped bottoms 11a, 11Da of the V-groove guides 11, 11D The holding force due to friction and the clamping force of the chuck 17 act in a suitably balanced manner, so that the tensile test is performed and the filamentous sample 8 is broken at the center without being cut at the chuck location.

In this way, when the tensile test operation is completed, the lower temporary hanging operation member 28, chucks 11, 11D
Since the thread-like sample 8 is no longer clamped by the thread-like sample 8, and the thread-like sample 8 is broken at the center, the remaining thread waste in the lower part is blown off by a jet (not shown), and the cutter 39 operates, and the thread waste in the upper part is blown away by the cutter 39. 3
The remaining thread waste on the left side cut by 9 is similarly blown away by the jet, but the cutter 39 has a flat part 39 of it.
a, 39b (FIG. 8) and can temporarily hold and hold the filamentous sample 8, so the filamentous sample 8 passes through the spool 37, the guide pin 32d, the roller 34, and the roller 36, and then reaches the flat part 39a. ,3
It is held at 9b and ready for the next tensile test.

Therefore, if a tensile test is to be performed subsequently, if the rotary arm 26 is rotated again in the direction of arrow A in this state, the filamentous sample between the rollers 34 and 35 will be removed by the temporary hanging operation member 28. 8
It is possible to pick up new information and perform tensile tests continuously. Further, when the test is to be completely completed, the filamentous sample 8 is cut by the cutter 38.

[Effects of the invention] As described above, in the present invention, since the amount of wrapping around the V-groove guide and the holding length of the chuck can be varied, it is possible to perform chucking that is most suitable for the filamentous sample to be tested. It has the advantage of being able to

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing an embodiment of the present invention;
Figures 2 and 6 are right side views that are an enlarged portion of Figure 1, Figures 3 and 5 are cross-sectional views that are further enlarged of parts of Figures 2 and 6, Figure 4 is a perspective explanatory view of the chuck, and Figure 7 The figure is a partially enlarged bottom view of FIG. 1, FIG. 8 is an explanatory view showing how the thread-like sample is hung on the V-groove guide and chuck, and FIG. 9 is a partially enlarged perspective view. 1...Base, 2, 3...Feed screw, 4...Fixed base, 5...Moveable base, 6...Load cell, 7, 24
... Connector, 8 ... Thread-like sample, 9, 9D ... Motor, 11, 11D ... V-groove guide, 11a, 1
1Da...Arc-shaped bottom, 12, 12D...Rotating side connector, 13, 25...Hook operation member, 1
4, 16...pipe, 15, 15D...fixed side connector, 17, 17D...chuck, 17a,
17Da... Fixed part, 17b, 17Db... Moving part, 17c, 17Dc... Gap, 23... Weight,
26... Rotating arm, 27... Shaft, 28... Temporary hanging operation member, 32... Lever, 33... Arm,
34, 36...Roller, 35...Crimping plate, 3
8,39...Cutter.

Claims (1)

[Claims for Utility Model Registration] In a chuck device for a thread tension testing machine that performs a tensile test by holding a thread sample 8 to be tested in a pair of chuck devices, at least one of the chuck devices is configured with a V-groove. V-groove guides 11, 11a having arcuate bottom portions 11a, 11Da, and fixing portion 1 having tightening surfaces 17aa, 17Daa on the same surface as the surface including the arcuate bottom portions 11a, 11Da.
7a and 17Da are disposed adjacent to the inside of the V-groove guides 11 and 11a, and a moving part 1 is movable back and forth and capable of adjusting the tightening force in order to clamp the filamentous sample 8.
chucks 17, 17D whose clamping lengths are variable depending on the direction of entry of the filamentous sample 8, in which the chucks 17, 17D are arranged to face the clamping surfaces 17aa, 17Daa; 11Da
After winding the thread sample 8 by a desired amount, the V-groove guides 11, 1 of the filamentous sample 8 are inserted into the chucks 17, 17D in the tangential direction from the wrapping end point.
A chuck device for a yarn tension tester, characterized in that the amount of winding around 1a and the clamping length of chucks 17 and 17D can be adjusted.