EP0541121A1

EP0541121A1 - Combed waste suction apparatus

Info

Publication number: EP0541121A1
Application number: EP92119081A
Authority: EP
Inventors: Hiroshi Nakayama
Original assignee: Murao and Co Ltd
Current assignee: Murao and Co Ltd
Priority date: 1991-11-08
Filing date: 1992-11-06
Publication date: 1993-05-12
Also published as: JP2529677Y2; JPH0545079U

Abstract

A combed waste suction apparatus includes a plurality of combed waste suction devices (2). In each combed waste suction device (2), a comb (8) for cleaning is intermittently reciprocated for scraping off combed waste (26) from an endless clearer cloth (6) of a roving frame (1). The combed waste (26) is drawn into a suction opening (24). A dust collecting tube (19) is disposed above the endless clearer cloth (6) for intermittent reciprocation. The comb (8) is disposed under the dust collecting tube (19). The dust collecting tube (19) is provided at its lower surface with a combed waste inlet opening (20) located at the vicinity of a blade of the comb (8). A shutter (21), which intimately and slidably contacts the suction opening (24), is fixed at an end of the dust collecting tube (19). The shutter (21) is provided with a communication opening (22) located at a position which enables communication between the suction opening (24) and an interior of the dust collecting tube (19) on the way of the intermittent reciprocation of the shutter (21), so that the communication between the suction opening (24) and the communication opening (19) may be selectively carried out in each combed waste suction device (2).

Description

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to an apparatus for selectively drawing combed waste by intermittently closing a suction opening used for drawing the waste combed from an endless clearer cloth of a roving frame by an air flow.

Description of the Background Art

Sliver in a form of yarn supplied to a roving frame is twisted by passing it through several sets of top rollers and bottom rollers, and there is provided a belt-like endless clearer cloth for cleaning generated waste cotton. The waste cotton adhering to the surface of the endless clearer cloth is scraped off by a comb. The comb is intermittently reciprocated along a moving direction of the endless clearer cloth, and positively scrapes off the waste cotton by a blade at its end during the forward motion. This reciprocation is carried out by a comb reciprocating device including a small electric motor and a cam mechanism. In order to prevent dispersion of dust and combed waste, the roving frame includes several sets of endless clearer cloths accommodated in a casing. For automatic processing of the combed waste, there is provided a combed waste suction device which draws and discharges the waste by an air flow through a suction opening formed in the casing. Since the endless clearer cloth is required for each supplied sliver, one set of the casing, the suction opening and a piping extending from the suction opening is provided for each cloth group including few sets of the endless clearer cloths. For this reason, there are provided many sets of pipings, and therefore, the respective pipings are combined by a duct through which the combed waste is introduced to a dust collector.
All the roving frames installed in a factory uneconomically require an air blower(s) having a considerably large capacity, i.e., a motor(s) having a considerably large capacity for drawing the combed waste, if the suction of the waste is carried out simultaneously in all the roving frames. If the suction is carried out selectively and sequentially for the respective casings, the large motor capacity is not required, and thus this selective suction may be preferred. However, in the prior art, this inevitably requires a complicated and expensive selector device, although the motor capacity can be reduced. Accordingly, it is an object of the invention to provide a combed waste suction device having a simple structure and capable of easy selective suction.

SUMMARY OF THE INVENTION

The present invention provides a combed waste suction apparatus, achieving the above-noted object, including a plurality of combed waste suction devices, each of which has a comb for cleaning an endless clearer cloth of a roving frame, a device for intermittently reciprocating the comb along a moving direction of an endless clearer cloth, and a suction opening for drawing combed waste by an air flow, wherein the combed waste suction device comprises a closed dust collecting tube, which is intermittently reciprocated by the device for reciprocating the comb and is disposed above the endless clearer cloth; the comb being disposed under the dust collecting tube, the dust collecting tube being provided at its lower surface with a combed waste inlet opening located at the vicinity of a blade of the comb; and a shutter disposed at an end of the dust collecting tube, the shutter intimately and slidably contacting the suction opening and being provided with a communication opening located at a position which enables communication between the suction opening and an interior of the dust collecting tube on the way of the intermittent reciprocation of the shutter, so that the communication between the suction opening and the communication opening may be selectively carried out in each combed waste suction device.
The shutter, which reciprocates together with the intermittently reciprocating comb and has the communication opening enabling the communication between the suction opening and the interior of the dust collecting tube, operates to intermittently open the suction opening, and this intermittent opening is selectively carried out in each combed waste suction device.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a cross section of a roving frame having a combed waste suction device according to the invention;
Figure 2 is a plan illustrating a major part of a combed waste suction device;
Figure 3 is a cross section taken along line III-III in Figure 2;
Figure 4 is a schematic view illustrating connecting structures of suction openings of roving frames having combed waste suction devices and air pipings; and
Figure 5 is a perspective view showing a combed waste suction device with a combed waste intake device removed therefrom.

DESCRIPTION OF THE PREFERRED EMBODIMENT

A combed waste suction apparatus of the invention will be described below in detail with reference to an embodiment shown in the figures. Figure 1 is a cross section of a roving frame 1 having a combed waste suction device 2, Figure 2 is a plan illustrating a major part of the combed waste suction device, and Figure 3 is a cross section taken along line III-III in Figure 2. Figure 4 is a schematic view illustrating connecting structures of suction openings 24 of a roving frame 1 having combed waste suction devices 2 and air pipings, and Figure 5 is a perspective view showing the combed waste suction device 2 with a combed waste intake device 18 removed therefrom.
As shown in Figure 1, a sliver 3 in a thread-like form supplied to the roving frame 1 passes between multiple sets of top rollers 4 and bottom rollers 5 in a casing 7. The combed waste suction device 2 is formed of the combed waste intake device 18, the suction opening 24 and a comb reciprocating device 10. The comb reciprocating device 10 includes a small motor 11, a cam mechanism, a rod 13 and a comb reciprocating arm 14. The rotation of the small motor 11 is converted by the cam mechanism 12 and the rod 13 for intermittently reciprocating the comb reciprocating arm 14 in a moving direction of an endless clearer cloth 6. The combed waste intake device 18 includes a dust collecting tube and a shutter (both shown in Figure 2). Combs 8 are fixedly disposed under the dust collecting tube. An end of the comb reciprocating arm 14 is connected to the upper side of the dust collecting tube, so that the combs 8 are intermittently reciprocated together with the dust collecting tube in the moving direction of the endless clearer cloths 6 for combing and scraping off waste cotton.
As shown in Figures 2 and 3, the combed waste intake device 18 is disposed above the endless clearer cloths 6, and is formed of the closed dust collecting tube 19, the several combs 8 and a shutter 21 disposed at one end of the dust collecting tube 19. Each comb 8 is held by a comb holder 9 and is located under the dust collecting tube 19. The dust collecting tube 19 is provided at its lower surface with combed dust intake openings 20 which are located at the vicinity of ends of blades of the combs 8, so that the combed waste 26 scraped off by the combs 8 are taken into the dust collecting tube 19 through the openings. In order to draw and discharge the combed waste taken into the dust collecting tube 19 by an air flow, a suction opening 24 is formed in a side wall 23 of the casing at a side of the endless clearer cloth 6. The shutter 21 is fixed to one end of the dust collecting tube 19 near the suction opening 24. The shutter 21 is guided by a slide guide 25 disposed on the side wall 23, so that it intimately contacts the suction opening 24 and intermittently reciprocates together with the dust collecting tube 19. On the way of the intermittent reciprocation, the suction opening 24 and the interior of the dust collecting tube 19 are communicated together through a communication opening 22 formed in the shutter 21. Thus, only the combed waste intake inlet 20 and the communication opening 22 are opened on the closed dust collecting tube 19.
As shown in Figure 4, the shutter 21, which is fixed to the dust collecting tube 19 and intermittently reciprocates, can close the suction opening 24 and can communicate the suction opening 24 to the interior of the dust collecting tube 19 through the communication opening 22. Thus, the suction opening 24 is intermittently opened and closed by the shutter 21. Further, the suction opening 24 is opened and communicated to the communication opening 22 only during a period immediately before the completion of a combed waste scraping step, in which the combs 8 disposed in the dust collecting tube 19 move forward, and immediately after the start of the rearward movement of the combs 8. In a period other than the above, the suction opening 24 is closed. The reciprocating position of the communication opening 22, i.e., the reciprocating position of the shutter 21 is determined to open and close the opening 24 in the manner described above. Further, the opening and closing timings of the suction openings 24 by the shutters 21 of the respective combed waste suction devices are sequentially shifted from each other, so that the draw and discharge of the combed waste 26 by the air flows are sequentially carried out in the respective combed waste suction devices 2.
The combed waste 26 in the dust collecting tube 19 is drawn while the suction opening 24 is open, and is sent through a suction guide 15, an air piping 16 and a collector duct 17 to a dust collector 29 by a blower 27 driven by an electric motor 28. While the suction opening 24 is closed and thus the suction is interrupted, the combed waste 26 gathers at the vicinity of the combed waste intake opening 20 in the dust collecting tube 19.
Since the drawing of the combed waste 26 is intermittently carried out and thus is selectively carried out, the blower 27 and thus the motor 28 do not require large capacities.
The comb reciprocating device 10 is utilized for the selective drawing, and a dedicated device is not employed.
Figure 5 is a perspective view showing a structure in such a manner that the combed waste intake device 18 and the comb reciprocating arm 14 near the combed waste suction device 2 are removed. Only one endless clearer cloth 6 is shown.
According to the invention, since the shutter which reciprocates together with the comb opens the suction opening only during a period immediately before the completion of the combed waste scraping step and immediately after the start of the rearward movement of the comb, and closes the suction opening during the period other than the above. The opening timings of the respective shutters are sequentially shifted from each other. Thereby, the capacities of the blower and motor can be small, which is economically advantageous.
Although the present invention has been described and illustrated in detail, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of the present invention being limited only by the terms of the appended claims.

Claims

A combed waste suction apparatus including a plurality of combed waste suction devices, each of which has a comb for cleaning an endless clearer cloth of a roving frame, a device for intermittently reciprocating said comb along a moving direction of an endless clearer cloth, and a suction opening for drawing combed waste by an air flow, wherein
said combed waste suction device comprises a closed dust collecting tube, which is intermittently reciprocated by said device for reciprocating said comb and is disposed above said endless clearer cloth, said comb being disposed under said dust collecting tube, said dust collecting tube being provided at its lower surface with a combed waste inlet opening located at the vicinity of a blade of said comb; and
a shutter disposed at an end of said dust collecting tube, said shutter intimately and slidably contacting said suction opening and being provided with a communication opening located at a position which enables communication between said suction opening and an interior of said dust collecting tube on the way of the intermittent reciprocation of said shutter, so that said communication between said suction opening and said communication opening may be selectively carried out in each combed waste suction device.