SU60646A1 - Apparatus for determining the elastic properties of knitwear, etc. - Google Patents

Description

Instruments for determining the elastic properties of materials provided with movable and stationary clamps for the test specimen, of which the movable clamp is attached to the Novorot drum connected with the pointer, are already known.

According to the invention, the device for determining the elastic properties of knitwear, etc., is related to the design of this type of device and has the peculiarity that for repeated periodic stretching of the sample, the drum is connected to a mechanism that periodically turns it to the required angle and in the form of a hook, mounted on the crankshaft and periodically gripping the mobile clip, fastened to the drum.

FIG. 1 shows the front view of the proposed device; in fig. 2- view from the side of the right disc; in fig. 3 - view from the side of the left disk.

The device consists of a drum 1 (Fig. 1), mounted on an axis 2, rotating in bearings, fixed in non-supporting racks 3 and 3. A movable clip 4 for the sample is fixed to the drum /. Pa opposite the clamp side of the drum strengthened counterweight balancing clamp. Racks 3 and 3, between which drum 1 is mounted on axis 2, are provided with through circular slots 5 and 6 (Fig. 2 and 3) for fingers 7 and S of movable clamp 4. Pin 7 of clamp 4 is pre-assigned to periodically rotate the drum / at the desired angle, and the pin 8 of the clip 4, which emerges through the slot 6 of the opposite rack 5, serves as a pointer to the full, residual and elastic elongation of the test sample on a scale 9 applied to the rack 3. The racks 3. and 5 are firmly fixed in the tripod 10, on which above the drum / fixed stationary clamp 11 for armature WCA. Clamp II is repositioned on a stand depending on the length of the test specimen. To adjust the angle of rotation of the drum 1 on the rack 5, the adjustable stop 12 is fastened, which leads the finger 7 out of engagement with the mechanism of the rotation of the drum.

The mechanism for periodic rotation of the drum / consists of a hook 13, mounted on the crankshaft 14, driven in rotation from the electric motor through the appropriate non-transmission.

When the crankshaft 14 rotates, the hook 13 grips the finger 7

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clamp 4 and rotates the drum 1 at an angle determined by the position of the stop 12, which pulls the hook 13 to the side and releases the finger 7 of the clamp 4.

A tension-free drum moves back to its former (zero) position. Making a full turn, the hook again seizes the finger 7 and, retracted it, up to the stop 12, again pulls it off, etc.

When you pull your finger off the hook, the force of the knitwear is reduced by a drumstick.

In order to minimize such a drop, a spring 13 is fitted, which is seated on the axis of the drum. It serves not only as a shock absorber for the return of the drum, but also makes it possible to regulate the operation of the device when testing various types of knitwear, giving constant test conditions. This is done by tensioning or loosening the springs.

The subject of the invention I. An apparatus for determining the elastic properties of knitwear, etc., provided with movable and fixed clamps for a test specimen.

of which a movable clip is fixed on a rotary drum associated with a pointer, characterized in that in order to allow repeated periodic stretching of the test sample, drum 1 is associated with a mechanism periodically turning it to the desired angle.

2. The form of the device according to claim 1, characterized in that the mechanism for periodic rotation of the drum 1 is made in the form of a hook 13 mounted on the crankshaft and periodically gripping the finger 7 of the movable clip.

3. The form of the device according to PP. 1 and 2, characterized in that the movable clip is provided with a finger 5, which serves as a pointer to the magnitude of the elongation of the test specimen under stretching.

4. The form of the device according to PP. 1-3, characterized in that the drum axis is fixed in two fixed stands 3 and 3, provided with circular slots 5 and 6 for the passage of the fingers 7 and 5 and a adjustable stop 12 for limiting the angle of rotation of the drum 1.