JPH0360938B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a belt-type false twisting device used when bulking multifilament yarn.

[Conventional technology]

The above-mentioned belt-type false twisting device performs false twisting by nipping yarn between two endless belts that intersect and run in different directions, and is already known.
The contact pressure between both belts is applied by a contact pressure applying device such as a spring or an air cylinder device (see Japanese Utility Model Publication No. 54-38634).

[Problem to be solved by the invention]

The nip pressure of the yarn in the false twisting device, that is, the contact pressure between both belts has a great effect on the false twisting efficiency, and therefore maintaining an appropriate belt indirect pressure is extremely important in obtaining high quality processed yarn. It is. If the contact pressure is too low, slips will occur between the yarn and the belt and the desired twist will not be formed, while if it is too high, both belts will come into strong contact with each other, accelerating wear and having a negative effect on the yarn. This has been confirmed. In addition, the above-mentioned appropriate belt indirect pressure takes different values depending on the type and thickness of the yarn to be processed, and for this reason, the contact pressure is changed each time the yarn type is changed. There is a need. Furthermore, it is necessary to reduce fluctuations in the contact pressure between both belts, but the contact pressure applying device described in the conventional technology, especially one using an air cylinder device, can absorb fluctuations in the contact pressure and finely adjust the contact pressure. The problem is that it cannot be done. In other words, when an air cylinder device is used to apply contact pressure, it has the advantage of being able to simultaneously control the belt-type false twisting device for each weight of a drawing false twisting machine consisting of multiple spindles, etc. It has the disadvantage that the air pressure constantly fluctuates due to changes in the load of the false twister or other belt-type false twisting devices. This fluctuation tends to increase as the air pressure decreases, so the most stable air pressure (for example, 2 at the terminal air pressure)
Although it is preferable to use a constant value of Kg/cm ² ),
In that case, it becomes impossible to change the contact pressure. In addition, even if the contact pressure of all the weights is adjusted simultaneously with an air cylinder device, the contact pressure of all the weights will not necessarily be the same due to mechanical loss (friction of the rotating shaft, etc.) of each weight.
It is not possible to make fine adjustments for each weight.

The present invention focuses on the above-mentioned circumstances, and when an air cylinder device that can set all the weights simultaneously is used to apply contact pressure, it is possible to alleviate contact pressure fluctuations and finely adjust the contact pressure for each weight. An object of the present invention is to provide a belt-type false twisting device that can easily perform the following steps.

[Means to solve the problem]

Two endless belts B1 and B2 wound around between a driving pulley 10 and a driven pulley 11 are provided so as to cross each other, and one belt B2 is urged to rotate the other belt B1 via a rotating body. In a belt-type false twisting device that applies contact pressure by applying contact pressure to nip and false twist the yarn at the intersection, an air cylinder device 28 urges the rotation of the rotating body in the direction of contact pressure, and an air cylinder device 28 that biases the rotation of the rotating body in the direction of contact A contact pressure reducing device 29 that biases in the contact pressure direction is provided, a biasing force fine adjustment member is provided in the contact pressure reducing device 29, and the contact pressure is adjusted by the difference between the biasing forces of the contact pressure applying device 28 and the contact pressure reducing device 29. It is something that is given.

[Effect]

This contact pressure reducing device 29 has the ability to reduce the contact pressure of the air cylinder device 28, thereby allowing the air cylinder device 28 to operate with the most stable air pressure. In addition, the contact pressure reducing device 29
The air cylinder device 2 is adjusted by lightly turning the screw body 31, which serves as a biasing force fine adjustment member, with a screwdriver or the like.
8, and has a fine adjustment function that compensates for the difference in contact pressure caused by mechanical loss in each weight.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a yarn false twisting machine using a belt-type false twisting device, in which yarn Y is pulled out from a yarn feeding package P1 supported by a creel stand 1 and introduced into a primary heater H1 from a first feed roller F1. . The yarn exiting the heater H1 passes through a balloon control plate 2 and a yarn cooling device 3, enters a belt-type false twisting device 4, and then passes through a second feed roller F2 and a secondary heater H.
2. It passes through the third feed roller F3 and is wound onto the winding package P2 by the winder 5. The twist formed by the false twisting device 4 is transferred to the first feed roller F1.
and is thermally fixed by the primary heater H1. Also, the third feed roller F3 and the take-up package P2
A known sensor S for detecting the occurrence of yarn breakage is provided between the yarn supply package P1 and
and the first feed roller F1 is the sensor S.
A cutter C is provided which operates to cut the yarn Y at the same time as the yarn breakage is detected.

The belt type false twisting device 4 is schematically shown in FIG. Two endless belts B1 and B2 are wound between two pulleys 10 and 11, respectively, and both belts B1 and B2 are provided to cross each other as shown in the figure. One of the pulleys 10 and 11 is a drive pulley that is rotationally driven by a device not shown, and the other pulley 11 is driven by a belt B1,
This is a driven pulley that is driven and rotated via B2.
The thread Y is nipped at the intersection of both belts B1 and B2, and each belt B1 and B2 is
By traveling in the 13 directions, it is sent downward and at the same time receives a twisting action. In order to apply a predetermined nip pressure to the yarn Y, one belt B2 side is fixed in its position, and the other belt B1 side is allowed to rotate together with the driven pulley 11 around its driving pulley 10, and rotates in the direction of arrow 14. This is done by applying pressure to the

The mechanism for supporting the belt B1 on the rotating side described above will be explained with reference to FIGS. 3 and 4. In the figure, a shaft 15 connected and fixed to a drive pulley 10 has a roller 17 at its lower end that contacts a running belt 16, and is rotatably supported in a cylindrical body 19 by a bearing 18. The cylindrical body 19
is fixed within a bracket 20, and the driven pulley 11 is rotatably supported on an arm portion 21 extending from the bracket. Further, a ring 25 having three protrusions 22, 23, 24 is fixed to the outer periphery of the cylinder 19 as shown in FIG.
It is rotatably supported on the base 27 via. These cylindrical body 19, bracket 20, etc. form a revolving body. Therefore, the cylindrical body 19 and the bracket 21 are rotatable together with respect to the base 27, and the shaft 15, that is, the drive pulley 10 is rotatable with respect to the cylindrical body 19. The running belt 16, which is stretched over the entire yarn false twisting machine, is driven to run by a device (not shown), so that the drive pulley 10 rotates from the rollers 17 via the shaft 15, and the endless belt B1 starts traveling, and the driven pulley 11 rotates. Furthermore, an air cylinder device 28, a contact pressure reducing device 29, and a belt separating device 30 shown in FIG. 4 are provided in the base 27, respectively. The air cylinder device 28, which operates all the weights at the same time due to the inflow of compressed air, has the tip of its piston rod 28a abutting the first protrusion 22 of the ring 25, and rotates the ring 25 in the counterclockwise direction in FIG. It is urged to rotate in the direction of arrow 14 in the figure. The contact pressure reducing device 29 includes a screw body 31 screwed into the base 27, a rod-shaped pin 32 fixed to the screw body 31, one end of which contacts the second protrusion 23, and the other end of which is loosely connected to the pin 32. It consists of a cap 33 that fits, and a spring 34 that is attached around the pin 32 and biases the screw body 31 and the cap 33 in a direction away from each other. The contact pressure reducing device 29 is provided in a direction perpendicular to the contact pressure applying device 28, and the force of the spring 34 causes the ring 25 to move clockwise in FIG. 5, that is, in the opposite direction to the arrow 14 in FIG. Rotate and energize. In addition, by rotating the screw body 31 as a biasing force fine adjustment member,
By changing the apparent length of the spring 34, the ring 25
The biasing force can be changed and adjusted as appropriate. The belt separating device 30 includes an operating lever 36 having a cam portion 35, and an operating rod 3 having one end in contact with the third protrusion 24 and the other end in contact with the cam portion 35.
7, and the working rod 37 is connected to the third protrusion 2.
It consists of a spring 38 that urges in a direction away from the spring 4. This belt separating device 30 is mainly used when first threading the belt-type false twisting device 4. By lightly turning the operating lever 36 by hand, the protruding portion of the cam portion 35 is released from the working rod 3.
7 and the tip of the rod 37 touches the third protrusion 2.
4, the ring 25 rotates clockwise in FIG. 4, and both belts B1 and B2 are maintained in a state separated from each other. During this time, by passing the thread Y between both belts B1 and B2 and turning the operating lever 36 again, the thread Y can be brought into a nip state. The screws 39 provided on the base 27 are for fixing the present false twisting device 4 to the body of the yarn false twisting machine, and the mechanism supporting the other endless belt B2 is the third one.
It is assumed that the mechanism is approximately the same as the mechanism shown in FIG.

Next, the adjustment function of the belt indirect pressure in the present belt-type false twisting device 4 will be explained. Contact pressure applying device 2
8 is constantly supplied with compressed air from a compressed air source (not shown), and the piston rod 28 swings and urges the bracket 21 via the ring 25 and the cylinder 19, creating a constant contact pressure between the belts B1 and B2. Granted. On the other hand, the contact pressure reducing device 29
The bracket 21 is pivoted and urged in the opposite direction by the force of 4, and the air cylinder device 2
It plays the role of reducing the contact pressure caused by 8.
If this contact pressure reducing device 29 is not present, both belts B
Only the repulsive force between 1 and B2 is the air cylinder device 2.
However, in this case, fluctuations in the compressed air sent to the air cylinder device 28 are directly transmitted as vibrations of the belts B1 and B2, and the yarn Y
adversely affects the processing conditions. Therefore, the contact pressure reducing device 29 reduces the belt B1 due to the fluctuation of the compressed air.
It has a function of relaxing and absorbing vibrations of B2 and continual changes in belt indirect pressure as a result, and stably maintaining processing conditions of yarn Y. In addition, the contact pressure reducing device 29 can change the strength of the resistance against the air cylinder device 28 by lightly turning the screw body 31 with a screwdriver or the like, so that the belt indirect pressure can be easily and weakly adjusted according to the switching of the yarn type to be processed, etc. It has a function that allows you to freely fine-tune the value to an appropriate value. Comparing the acting forces of the air cylinder device 28 and the contact pressure reducing device 29, the air cylinder device 28 is naturally stronger, and there is no need to finely adjust the air pressure in the air cylinder device 28, making it the most stable. The air pressure can be set to a substantially constant value.

In addition, in the main yarn false twisting machine shown in FIG. The compressed air in the air cylinder device 28 is released and the device 28 is deactivated. Therefore, at this time, the piston rod 28a retreats and leaves the first protrusion 22,
The ring 25 is the spring 34 of the contact pressure reducing device 29.
The force rotates clockwise in Figure 4. Then, the endless belt B1 turns in the direction opposite to the arrow 14 in FIG. 2, and both belts B1 and B2 separate from each other.
Thread Y is released. This is to prevent the yarn end of the yarn Y from wrapping around various parts of the false twisting device 4 due to the occurrence of the yarn breakage, or from inducing new yarn breakage. This is also to avoid direct contact between the belts B1 and B2 due to the loss of yarn Y, thereby preventing belt wear.

In the present belt-type false twisting device described above, the contact pressure reducing device is not limited to a spring with a screw, but can be constructed using a solenoid with an adjustment dial, and both are included in the present invention.

〔Effect of the invention〕

As explained above, according to the present invention, (a) an air cylinder device capable of setting contact pressure for all the spindles at the same time is used to apply contact pressure to each weight, and the contact pressure is increased from the opposite direction by a contact pressure reduction device; Since the structure is configured to reduce the contact pressure, it is possible to alleviate contact pressure fluctuations caused by air pressure fluctuations and maintain an appropriate belt contact pressure. (b) Moreover, since the acting force of the contact pressure reduction device can be finely adjusted, the contact pressure difference caused by mechanical loss in each weight can be compensated for,
It is possible to eliminate variations in contact pressure between each weight.
(c) As a result, even when using an air cylinder device that can set contact pressure for all spindles simultaneously to apply contact pressure to each spindle, belt indirect pressure can be adjusted according to the yarn type without significantly changing the air pressure. can be set and controlled reliably and easily with delicate values, and has the effect of stably producing high-quality processed yarn.

[Brief explanation of drawings]

Fig. 1 is a side view of a yarn false twisting machine using this belt type false twisting device, Fig. 2 is a perspective view showing the outline of the belt type false twisting device, and Fig. 3 is one of the belts in the belt type false twisting device. A partial vertical sectional view showing the mechanism supporting the
FIG. 4 is a sectional view taken along the line A--A in FIG. 3. 4... Belt type false twisting device, 10... Drive pulley, 11... Driven pulley, 19... Cylindrical body (swivel body), 28... Air cylinder device, 29... Contact pressure reducing device, 31... Screw Body (biasing force fine adjustment member), B1, B2...endless belt, Y...thread.

Claims (1)

[Claims] 1. Two endless belts B1 and B2 wound around between a driving pulley 10 and a driven pulley 11 are provided to cross each other, and one belt B2 is connected to the other belt B1 via a rotating body. In a belt-type false twisting device that applies contact pressure by applying force so as to be able to rotate and nip yarn at the intersection to perform false twisting, an air cylinder device 28 that urges the rotation of the rotating body in the direction of contact pressure. and a contact pressure reducing device 29 that urges the rotation of the rotating body in the opposite contact pressure direction.
A belt type false twisting device characterized in that a biasing force fine adjustment member is provided at 9, and contact pressure is applied by the difference between the biasing forces of an air cylinder device 28 and a contact pressure reducing device 29.