JPH043012Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention is a device for detecting disconnection and abnormal running of spindle drive belts of spinning machines, especially ring spinning machines and ring twisting machines that utilize a tangential belt drive system. It is related to.

(Prior Art) Conventionally, a device for detecting breakage of a spindle drive belt as shown in FIG. 5 is disclosed in Japanese Utility Model Application Publication No. 145828/1983. In this device, a contact roller 24 is wound between a driving pulley 21 and a driven pulley 22 and contacts a tangential belt 23 running in the longitudinal direction of the machine base, and the roller 24 is pressed against the tangential belt 23. Leaf spring 25
, the contact roller 2 engages with the plate spring 25.
When the tangential belt 23 is cut, the engagement between the plate spring 25 and the limit switch 26 is released, thereby detecting the cutting of the belt.

(Problems to be Solved by the Invention) However, although the conventional device described above reliably detects a break in the belt, it is difficult to detect a running abnormality that causes the belt to meander in the width direction. That is, in order to detect abnormal running of the belt, a pair of contact rollers 24 are placed in contact with both upper and lower ends of the belt as shown in FIG. Although it is possible to configure the limit switch 26 to detect a running abnormality in such a case,
There is an inconvenience that the detection part may be damaged due to the meandering of the belt. Additionally, when using a tangential belt, the driven pulley, guide pulley, etc. are generally provided with a flange at one end to prevent the belt from coming off. Due to abnormal running, the end of the belt continues to run in a state where it comes into contact with the flange of the guide pulley or the like, resulting in early damage to the belt. Furthermore, if the drive is continued in an abnormal running state such as meandering, there is a problem that the contact pressure between the belt and the spindle is insufficient, and the spindle rotational speed is not constant, resulting in uneven yarn quality.

Structure of the invention (Means for solving the problems) In order to solve the above problems, this invention simultaneously contacts a large number of spindles arranged along the longitudinal direction of the spinning machine table to control each spindle. A non-contact type detection device was provided to detect when the amount of displacement in the width direction of the driven belt reached a predetermined value or more.

(Function) In the device of this invention, displacement of the belt is detected by a non-contact detection device, and when the amount of displacement in the width direction of the belt reaches a predetermined value or more, it is detected as a breakage or running abnormality of the belt.

(Example 1) The first example that embodies this idea will be described below.
This will be explained according to Figures 3 to 3. A large number of spindles 2 are arranged in rows at a constant pitch on a spindle rail 1 extending along the longitudinal direction of the machine. An endless tangential belt 3 that drives the spindles 2 is wound between a driving pulley and a driven pulley (none of which are shown), running tangentially to the warb 4 of each spindle 2. . Inside the tangential belt 3, a pressure roller 5 for ensuring contact pressure between the tangential belt 3 and the warb 4 is placed at a predetermined interval while being biased toward the tangential belt 3. It is arranged.

A reflective position detecting device 7 as a non-contact type detecting device is disposed above the tangential belt 3 via a bracket 6 fixed on the spindle rail 1. The detection device 7 is configured to condense the reflected light L irradiated onto the object to be detected from the light projecting section with a light receiving lens, and to connect a spot on the optical position detection element, and detects the amount of displacement of the object to be detected. A known detection device is used which is configured to detect by moving the position of a spot. The detection device 7 detects the amount of displacement of the upper end surface of the tangential belt 3, outputs a signal when the amount of displacement exceeds a predetermined value, and activates an alarm buzzer, warning lamp, etc. based on the signal. The alarm system is activated and the drive of the machine is stopped at the same time.

Next, the operation of the apparatus configured as described above will be explained. At the same time as the machine is driven, the tangential belt 3 is driven and each spindle 2 is driven to rotate.
The detection device 7 constantly emits detection light from its light projecting portion toward the upper end surface of the tangential belt 3, and the reflected light L is focused by the light receiving lens. A running abnormality such as meandering occurs in the tangential belt 3, and the tangential belt 3
As shown in the figure, when the position of the tangential belt 3 is displaced, the position of incidence of the reflected light L on the detection device 7 changes in accordance with the amount of displacement. If this amount of displacement exceeds a preset value, it is determined that the vehicle is running abnormally. Further, when the tangential belt 3 is cut, the reflected light L is no longer incident on the detection device 7, and thereby it is detected that the tangential belt 3 is cut. When disconnection or abnormal running of the tangential belt 3 is detected, the detection device 7 issues a detection signal, and based on the signal, the machine is stopped or an alarm device is activated.

Therefore, it is possible to prevent a situation in which the contact pressure between the belt and the spindle becomes insufficient due to the continuation of the abnormal running state, and the spindle rotational speed fluctuates, resulting in uneven yarn quality. Furthermore, there is no need to provide a flange on the guide pulley or the like to prevent the belt from coming off.

It should be noted that it is rare for the tangential belt 3 to suddenly break, and it is common for running abnormalities to occur before the tangential belt 3 breaks, and if damage to the tangential belt 3 is discovered at the stage of running abnormality, Damage to other parts of the spinning machine or breakage of the spun yarn due to sudden breakage of the tangential belt 3 can be prevented.

(Example 2) Next, a second example will be described with reference to FIG.
The device of this embodiment differs from the previous embodiment in that two pairs of phototubes are used as the non-contact detection device. As shown in FIG. 4, the two pairs of phototubes are arranged such that the projectors 9a, 10a and the receivers 9b, 10b are sandwiched between the upper and lower ends of the tangential belt 3 by brackets 8. In this device, when the tangential belt 3 is cut, the irradiated light from both the projectors 9a and 10a is transferred to the receiver 9b.
10b senses and detects the breakage of the tangential belt 3. In addition, when the tangential belt 3 is displaced upward by more than a predetermined value due to abnormal running due to meandering, the light receiver 10b disposed at the bottom
On the other hand, when the tangential belt 3 is displaced downward by more than a predetermined amount, the upper receiver 9b senses the light emitted from the projector 9a and the tangential belt 3 detects the emitted light from the projector 10a. Abnormal running of the general belt 3 is detected.

Note that this invention is not limited to the two embodiments described above, and for example, in the apparatus of the first embodiment, the reflective position detection device 7 may be arranged at a position to detect the displacement of the lower end of the tangential belt 3. You can.
Furthermore, when the width of the tangential belt 3 is narrow, it is possible to detect running abnormalities and breaks by arranging one pair of phototubes instead of two pairs of phototubes. In addition, in the embodiment shown in FIG. 4, the two pairs of phototubes are arranged so that they are shielded from light in a normal state and sense the irradiated light in an abnormal state. A configuration may also be adopted in which two pairs of phototubes are arranged to sense the irradiated light in a normal state and block the light in an abnormal state. Furthermore, by disposing non-contact detection devices at multiple locations, the accuracy of detecting abnormal driving can be further improved. Further, the present invention is not limited to ring spinning machines, ring twisting machines, etc., but can also be applied to other spinning machines such as open-end spinning machines.

Effects of the invention As detailed above, according to this invention, abnormal running that causes not only breakage of the spindle drive belt but also displacement in the width direction is reliably detected. This not only prevents unevenness in yarn quality due to fluctuations in the number of threads, but also allows the belt to be replaced by detecting abnormalities before the drive belt breaks, thereby preventing damage to other parts due to belt breakage. It has the excellent effect of preventing

[Brief explanation of the drawing]

Figure 1 is a side view showing the first embodiment embodying this invention, Figure 2 is a schematic plan view, Figure 3 is a side view showing the operation, and Figure 4 is the second embodiment. A side view, FIG. 5 is a schematic plan view of the conventional device, and FIG. 6 is a schematic plan view of the conventional device.
The figure is a side view of the vehicle configured to be able to detect running abnormalities. Spindle...2, Tangent seal belt...
3. Reflective position detection device as a non-contact detection device...7. Also a phototube floodlight...9a, 10
a. Also light receiver...9b, 10b.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. The amount of displacement in the width direction of a belt that contacts a large number of spindles arranged along the longitudinal direction of the spinning machine frame and drives each spindle reaches a predetermined value or more. This is a device for detecting breakage and running abnormalities in spindle drive belts in spinning machines equipped with non-contact detection devices. 2. In the spinning machine according to claim 1, wherein the non-contact detection device is a reflective position detection device, and is disposed at a position where light is irradiated toward the end surface of the running belt. Spindle drive belt disconnection and running abnormality detection device. 3. The spindle drive in a spinning machine according to claim 1, wherein the non-contact detection device is constituted by two pairs of phototubes placed between the belt at positions corresponding to the ends of the belt. Belt cut and running abnormality detection device.