JPS581210B2 - Seiboukiniokeru - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When an abnormality is detected in a spinning machine by a yarn breakage detector, a thickness unevenness detector, etc., the present invention automatically stops the supply of staple raw materials based on the signals from these detectors. The staple raw material end cut by the stop is passed through the back roller and the next downstream roller (in the case of a 3-wire system, the second roller,
This invention relates to an automatic raw material supply stop device in a spinning machine that is installed between the third roller (in the case of a four-wire system) and is highly labor-saving and does not require the work of resupplying the staple raw material when restarting.

Conventionally, in ring spinning machines with slow spinning speed, staple raw material is constantly supplied to the draft device even when yarn breaks, and is sucked into the new man nozzle at the exit of the front roller, but the staple raw material sucked into the new man nozzle is waste Then,
It is uneconomical.

Particularly in high-speed spinning machines, such as open-end spinning machines, twist-free spinning machines, and bundled spinning machines, which have recently made remarkable progress, it is not only uneconomical, but also when the new man nozzle causes a suction failure, the staple material is transferred to the rotating part. It can get wrapped around and cause big trouble.

Therefore, various proposals have been made as automatic staple material supply stop devices, and methods such as stopping the supply using a cutter installed in front of the cross roller, and separating the top roller of the cross roller from the bottom roller are known.
The former serves the purpose of simply stopping the supply of staple raw materials, but when restarting, the staple raw materials must be supplied again manually, especially when trying to save labor with an automatic yarn splicing machine. , resupply of staple raw materials becomes a major obstacle.

Japanese Patent Publication No. 49-41487 discloses a method for separating the back top roller from the back bottom roller.

This invention moves the back top roller to the second roller side in response to a yarn breakage detection signal, eliminates the nip action of the back roller, and uses the back top roller to press the roving against the roving presser provided between the second roller and the back roller. This is a device that stops the supply when the top bag is turned on, and restarting is possible by returning the top roller to its original position, but it is not easy to move and return the roller with a nip pressure of 10 to 20 kg applied. Due to the mechanical structure, it is difficult to put it into practical use.

In addition, in a four-wire draft device, it is necessary to move both top rollers of the third back, and the back bottom roller rotates while contacting the stopped roving, so sometimes the roving is wound around the back roller. The object of the present invention is to provide an automatic staple material supply stop device in the event of an abnormality, which solves these problems.

To this end, in the present invention, in the draft device of a spinning frame consisting of multiple spindles, each roller on the upstream side before the second roller is provided with a pair of aprons whose tips extend to the vicinity of each roller on the downstream side, or the bottom roller In addition to being equipped with an apron, the bottom roller of the back can be driven and stopped for each spindle from a single line shaft via a clutch, and abnormality detectors such as thread breakage detectors and thread unevenness detectors can be installed. The clutch is disengaged in response to an abnormality detection signal to stop the cross crawler, and the staple material is cut between the cross crawler and the next downstream roller. be.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

Figure 1 shows an example of the binding spinning process to which the present invention is applied, for producing so-called bundled spun yarn in which the center layer is twist-free and the surface layer fibers are spirally wound around it. It is something that

The present invention is not limited to this process, but can be applied to ring spinning machines, open-end spinning machines, twistless spinning machines, and others having a roller draft device.

In Fig. 1, the staple raw material 2, which is being pulled out from the Shinomaki 1 which is the staple raw material, passes through the guide 3, the trumpet 4, a pair of back rollers 5, 5', and the downstream end of these rollers is passed to the second roller. A pair of transfer aprons 6, 6 adjacent to each other and having open downstream ends
is supplied to the bat crawler section consisting of .

A brake draft is provided between the back roller section and a second roller section consisting of a pair of second rollers 7, T' and aprons 8, 8' placed over these rollers. The staple fiber bundle, which has reached a predetermined thickness and is further drafted between a pair of front rollers 9 and 9' covered with a transfer apron 10 and 10', is formed by integrating a pneumatic member and a fluid temporary twisting member in series. The yarn is sucked and twisted by the nozzle 11, formed into a bound spun yarn, passed through the guide 3' take-up roller 17' and the yarn breakage detector 18, and then wound up by the winder 19.

The connecting pipe 12 connects the pneumatic duct 13 and the pneumatic part of the nozzle 11, and sucks up fluff generated when the thread breaks.

Further, the pressure pipe 14 supplies compressed fluid to the nozzle 11 from the compressed fluid supply pipe 15.

Next, the operating state when the thread breaks will be described.

When the yarn breakage detector 18 detects a yarn breakage, it disengages a clutch, which will be described later in FIGS. 2 and 3, in response to an electrical signal, and stops the supply of the suarpu raw material by stopping the back rollers configured to drive each weight.

By stopping the back crawler, the supplied staple raw material 2 is cut into a transparent shape between the nip points of the back crawler sections 5, 5', 6, 6' and the second rows 27, 7', and the cut end is cut off from the apron of the back roller section. 6, 6'.

When restarting, the yarn breakage detector 18 is temporarily deactivated, the clutch is activated, the staple roller section is rotated normally, and the supply of the staple fiber bundle is restarted. As shown, the pneumatic action is temporarily stopped, and the suction action and swirling action of the nozzle 11 are used to form a thread, which is blown out from the nozzle outlet along with the airflow.

This yarn is tied to the yarn end of the package 19' manually or preferably by an automatic yarn splicing machine.

Thereafter, after confirming that the thread is running normally, the thread breakage detector 18 is restored to its operating state.

Although the connection with the yarn breakage detector has been described above, the same operation can be performed by using an abnormality detection signal from the yarn unevenness detector 16 or the like installed at an appropriate location.

FIG. 2 is a side view showing one embodiment of the present invention, and FIG.
The figure is a front view of FIG. 2.

As shown in the figure, the back bottom roller 5 is supported by a bearing 22 and connected to an electromagnetic clutch 23 so that the back roller is of a weight-driven type.

A gear 24 is fixed to the shaft at one end of the electromagnetic clutch 23 and meshes with a gear 25 fixed to a constantly rotating line shaft 26, so that power is transmitted to the back bottom roller 5 via the electromagnetic clutch 23. .

Bat crawler 5, 5' and ten server or roll 21
．． Aprons 6, 6' are hung between the 21'.

Further, if necessary, tension rolls 20 and 20' can be provided to make it unnecessary to replace the apron when changing the gauge or to tension the apron.

It is preferable that the downstream ends of the aprons 6, 6' be slightly opened and that the nip of the staple material 2 is gripped only at the nip point on the straight line connecting the centers of the bag rollers 5, 5'.

The role of the apron is that staple raw material 2 is the bottom apron 6.
The fibers ride on the top and are transferred straight to the second roller, which reduces the occurrence of fluff, and as mentioned above, when the yarn breaks, the cut staple raw material 2 is grasped at the nip point of the butt roller, and is easily removed. The cut end of the fiber bundle is stopped between the aprons 6 and 6', and when the fiber bundle is restarted, the fiber bundle is transferred without hanging down or scattering, and the role is to ensure that the fiber bundle is fed to the second roller. have.

Here, the cross rollers 5, 5' and the second rollers 7, 1'
When changing the gauge between the cross rollers 5 and 5'
The tension of the apron can be adjusted to an appropriate state by changing the distance between the tension bars 21, 21' from the center of the apron, and replacing the apron, or by moving the tension rolls 20 and 20' described above.

It is preferable that the tensor roll rotates, but since the circumferential speed of the apron is slow, it may be of a fixed type.

Further, when changing the brake draft rate, it can be changed using a gear that drives the line shaft 26 at a gear end (not shown) of the spinning machine.

The above is a description of a 3-wire draft device, but a 4-wire draft device is also equipped with a pair of aprons whose tips extend to the vicinity of each roller on the downstream side, and each roller on the upstream side before the second roller is provided with a pair of aprons. A weight-driven structure may be used.

With the configuration described above, the electromagnetic clutch 23 is disengaged by a signal from the thread breakage detector, etc., and the back bottom roller 5 and the back bottom apron 6 are disengaged.
stops, and the back top roller 5' and back top apron 6', which are brought into contact and driven, also stop while holding the staple material 2.

When restarting, the thread breakage detector etc. are set to the inactive state and the electromagnetic clutch 23 is set to the human state, and the staple roller section starts rotating normally and transfers the cut end of the staple material 2 that was being held to the downstream roller. , it is fed to the front roller, and normal operation begins.

After forming the drafted staple raw material into yarn by an appropriate means and confirming that the yarn is running normally, the yarn breakage detector and the like may be returned to the operating state.

Although FIGS. 2 and 3 show embodiments in which gears are used as the transmission mechanism, other means such as a toothed belt or the like may be used as long as they can reliably transmit power.

Furthermore, the clutch is not limited to an electromagnetic clutch, and any known clutch such as one that utilizes air pressure can be used.

FIG. 4 shows another embodiment of the present invention, in which an apron 6 is not suspended on the back top roller 5', but an apron 6 is suspended only on the back bottom roller 5.

The object of the present invention can also be achieved using this device.

That is, the rollers upstream of the second rollers 7, 7' only need to have an apron suspended from at least the bottom roller.

Furthermore, in the present invention, since the cross crawler is of a weight-driven type,
Although an embodiment has been described in which the back bottom roller is driven from one line shaft via a clutch, the present invention is not limited to this, and other embodiments may be used as long as the back bottom roller is driven by each weight.

Further, two or more line shafts may be used.

As detailed above, according to the present invention, when the staple raw material supply is automatically stopped and restarted by an abnormality detector such as a thread breakage detector or a thread unevenness detector, no staple raw material supply work is performed. It is extremely useful from the point of view of streamlining the spinning operation because it can be returned to normal operation without any problems, and troubles such as winding do not occur.

Furthermore, it is easy to connect with labor-saving machines such as automatic yarn splicing machines.
This can have an extremely labor-saving effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram when the present invention is applied to a binding spinning process, which is one of the spinning processes. FIG. 2 is a side view showing essential parts of an embodiment of the present invention, and FIG.
The figure is a front view of FIG. 2. FIG. 4 is a process diagram showing another embodiment. 1: Staple raw material Shinomaki, 2: Staple raw material being supplied, 3. 3', 4: Guide and trumpet guide, 5.5', 6.6': Bat crawler and apron, 7.7', 8.8': Second roller and apron, 9.9', 10, 10': Transfer Apron and front roller, 11: Fluid nozzle integrated with pneuma, 16: Yarn unevenness detector, 17: Take-up roller, 1
8: Yarn breakage detector, 19.19': Winding machine and winding package, 20.20': Tension roller, 2L21
': Ten bar or roller, 22: Bearing, 23:
Electromagnetic clutch, 24, 25: Gear, 26: Line shaft.

Claims (1)

[Claims] 1. In a draft device of a spinning frame consisting of multiple spindles, an apron is provided on at least the bottom roller of each pair of upstream rollers before the second roller, and the back bottom roller can be driven and stopped for each spindle via a clutch. By disengaging the clutch in response to an abnormality detection signal from an abnormality detector such as a thread breakage detector or a thread unevenness detector, the cross crawler is stopped, and the staple material is cut between the cross crawler and the next downstream roller. Automatic raw material supply stop device for spinning machines.