FR2566200A1 - Device for stripping power (electric) cables, intended for the recovery industry - Google Patents

Abstract

The subject of the invention is a device for stripping power cables, intended for the recovery industry. This device is noteworthy in that it comprises at least two fixed-position gear-motor sets A, B oriented obliquely with respect to each other and supporting, at the end of shafts, two toothed rollers which brought together define an angle of approximately 60 degrees, the said teeth serving as surfaces for bearing on and entraining the cable to be stripped; vertical cutting means, diametrically opposed with respect to each other with respect to the said cable, allowing cutting along two opposed generatrices in order to ensure the suitable detachment of the outer sheathing from the cable.

Description

The subject of the invention is a stripping device for electric cables intended for the recovery industry,
Cable stripping machines are known which generally include two parallel shafts with either V-shaped impression wheels in which the cable is driven, or with cutting discs mounted on the cylindrical shafts. In the first case, the machine, although operating satisfactorily, comprises many parts and the equipment is expensive. In the second case, the drive is bad because the cutting discs have a low drive power.

 The aim sought after according to the invention was therefore to design a simple device. inexpensive, adaptable to different cable sections in a range from 5 millimeters to about 160.

 According to a first characteristic, the stripping device for electric cables intended for the recovery industry comprises at least two gearmotor groups (AB) with a fixed position oriented obliquely to one another and supporting two rollers at the end of the shafts. closely spaced teeth define an angle of approximately 60 degrees, said teeth serving as bearing faces and for driving the cable to be stripped; and vertical cutting means (C-D) diametrically opposite one with respect to the other with respect to said cable allowing cutting in two opposite generatrices to ensure appropriate detachment of the outer sheathing of the cable.

 These characteristics and others will emerge clearly from the following description.

To fix the subject of the invention in a nonlimiting manner illustrated in the figures of the drawings where:
Figure 1 is a schematic view illustrating the principle implemented by the device of the invention.

 Figure 2 is a schematic alternative view.

 Figures 3 and 4 are schematic views illustrating the machine for implementing the device.

 Figure 5 is an enlarged sectional view illustrating the upper part of the frame of the machine comprising the device.

Figure 6 is a partial sectional view along the line
AA in Figure 5.

 FIG. 7 is a side view in section according to FIG. 5.

 Figure 8 is a sectional view along line 8-8 of Figure 7.

 In order to make the object of the invention more concrete, it is now described in a nonlimiting manner illustrated in the figures of the drawings.

 Referring to FIG. 1, the principle of implementation of the invention is to use two geared motor groups (AB) with a fixed position oriented obliquely to one another and supporting at the end of shaft two toothed rollers, which close together define an angle of approximately 60 degrees, the toothed faces of the rollers serving as bearing faces and for driving the cable to be stripped.

The teeth partially penetrate the constituent material of the cable and ensure during the rotation of the geared motors the advancement of the cable. The cylindrical rollers thus have their axes not parallel. Vertical cutting means (C-D) are diametrically opposed to each other with respect to the cable at the level of the aforementioned rollers, thus authorizing the cutting of the coating of the cable into two opposing generators allowing appropriate detachment of the external sheathing.

 Referring to FIG. 2, a variant of the principle has been illustrated with the use of a third geared motor group (E) arranged in a horizontal plane oriented obliquely of about 60 t also relative to the other groups (A-8 ) defining a triangulation of training. In this case, the cable is held by the 3 respective rollers. and the cutting means (C-D) are arranged substantially offset, of the three groups. The groups (A-B) are in a fixed position, and the third (E) as well as the cutting means are adjustable in height to adjust to the diameter of the cables to be stripped.

 We will now describe a non-limiting implementation of the device defined according to FIG. 1 it goes without saying that its production with variant nO 2 would have been obtained with similar means.

 The device according to the invention is arranged on a frame referenced as a whole by (1) (FIGS. 3 and 4) comprising a base (11) and an upper structure (12) defining the casing for protecting and maintaining the means of the device . This structure includes: a horizontal bottom (2). with an opening (21) for positioning the lower cutting means which will be described later, profiles forming the longitudinal walls (22) with in particular a central cutout (23) for the passage of the stripping cable (CA), profiles forming the side walls (Z4). Furthermore, the upper part of the casing has an opening (3) arranged to constitute a column for guiding and holding the upper cutting tool.

 Advantageously for this purpose, the side walls have at their upper part a flap (25) vertical and squared at its end (26). The wall profiles are made of sheet metal or other suitable materials.

 Near each side wall are appropriately arranged and maintained support means (4) of the geared motors (AB) angularly oriented at 60 degrees with respect to each other, and by 30 degrees with respect to the vertical axis defined by the cutting plane of the upper knife. The gearmotor groups (motor A-8) (gearbox AB) are fixed in any suitable manner on said support means. At the end of the shafts (A -B) of said groups are provided rollers (5-6) provided peripherally with teeth (516 1) As illustrated, the positioning of said groups is such that the two rollers are brought together practically until tangent at their lower point, thus contributing to perfect positioning, holding and training of the cable, said teeth -6), penetrating the material and ensuring the advancement of the cable.

 In addition, it is provided to guide the cable horizontally a V-shaped section (7) held by a console (8) or equivallent secured to the chassis. This profile (7) provides a prepositioning of the cable towards the place of cutting and stripping of the external coating of the cable. The V-shape of said profile allows the work of all cable sections, as illustrated in Figure 5, with schematically in dotted lines three cables of different diameter.

This form is advantageous since the cable cannot escape by sliding during the stripping operation. To improve stability, provision has been made for the possible use of a complementary pressure roller (9) (Figure 7) disposed substantially above the profile (7) and in front of the upper cutting device. This roller is mounted for free rotation on a support pin (10) disposed on the yoke end of a sheath (11) capable of being positioned in an adjustable manner relative to the chassis. in order to adapt to the section of cable that is being worked.

 The upper cutting device will now be described with reference to Figures 5-6. Inside the guide column (3) produced in the upper part of the casing is engaged and fixed by welding or otherwise, a cylindrical sleeve (12) projecting outwardly, inside which is engaged a sleeve (13) gdEen keyed position. This sleeve has an internal bore (131) cooperating with the threaded rod (141) of a screw (14) with a fixed axial position, forming an operating wheel. An upper bearing (15) is supported on the upper end of said sleeve (12 ), the rod being engaged in a bore (151) and the flywheel projecting externally. The rotation of the operating wheel causes the axial displacement of the sleeve (13) with respect to said sheath ensuring in a controlled manner its height adjustment. More particularly the lower end (132) of said sleeve is arranged in the form of a yoke (133) to receive an axis (16) supporting a cutting disc (17) or knurling wheel, the cutting part of the latter coming into contact and penetrating and cutting the outer covering of the cable to be stripped. The cutting disc or wheel (17) is engaged by its non-active part inside the bore (131) of the sleeve being considered that in the maximum high position, there is no contact between the upper part of the wheel (17) and the end of the rod (141) of the control wheel. The length of the rod (141) is established so as to ensure a sufficient adjustment stroke of the cutting disc as a function of the section of the cable to be stripped disposed in the U-profile (7). FIG. 5 is illustrated in lines dotted different positions of the cutting disc depending on the cable section. As a variant, it is possible to provide for the cutting tool to be a knife with a sharp cutting edge to ensure cutting, said knife being fixed in a removable manner or not on the lower end of the sleeve (13) arranged in a complementary manner.

 As appears in FIG. 7, the U-shaped profile (7) for prepositioning the cable has its front end substantially at the level and preferably set back from the vertical cutting plane of the upper cutting disc.

 The lower cutting device is placed in the lower part of the bottom of the casing, is introduced inside it by an opening (21) arranged for this purpose. This device is positioned and oriented so as to come to bear on the outer coating of the cable to be stripped by partially penetrating a plane diametrically opposite the upper cutting point to cut it. For this purpose, a sheath (18) is fixed on brackets (19) of the chassis in an oblique orientation (Figure 7) and receives at its lower part a span (19) provided with a central opening (191) for positioning of the rod (201) of the handwheel (20). Said rod (201) cooperates with an internal bore (211) of a sleeve (21) sliding inside said sleeve.

The sleeve is established at its projecting end either with a cutting disc 0 or with one or more adjacent fixed position knives (22) capable of penetrating the material. The cutting part is tapered. The knives can be removable to allow on the one hand their sharpening and on the other hand their change according to the characteristics of the cables to be stripped.

 Other embodiments can be provided without departing from the scope of the invention. Furthermore, depending on whether the teeth (51-61) of the two drive rollers are substantially tangent to each other at the lower part, or substantially spaced, the edge of the lower knife will be substantially offset forward by report to said point of tangency, or will enter the aforementioned defined space.

 The direction of movement of the cable has been indicated by the arrow F (FIG. 7).

 In the hypothesis of the implementation of the principle described with the variant with three groups of geared motors, the casing will be fitted out in the appropriate manner according to the diagram illustrated in FIG. 2.

 I1 is provided damping means of the Belleville washer type (23), or equivalent system on the rod (141) of the handwheel towards the bearing surface (19) so as to bring a certain flexibility of operation and cutting of the knives.

 One could envisage as a variant the positioning of two or more cutting tools in planes different from the latter advantageously described above.

 The advantages of the invention are emphasized, the simplicity of design and construction of the cable stripping device, the perfect maintenance of the cable, the easy adjustment of the cutting device according to the section of the cables to be stripped, the simple manufacture of the chassis. support of the device, the low cost price of the assembly.

 Furthermore, the device works at constant speed with positive drive.

 Finally, it should be noted that the thrust forces at the end of the shaft on the reduction motors are satisfactory and appropriate depending on the section of the cabals.

 The invention is in no way limited to that of its modes of application any more than to those of the embodiments of its various parts which have been more particularly indicated; on the contrary, it embraces all its variants.

Claims (9)

-1- Stripping device for electric cables intended for the recovery industry, characterized in that it comprises at least two gearmotor groups (A) (B) with fixed position oriented obliquely to one another and supporting at the end of the shafts two toothed rollers which close together define an angle of approximately 60 degrees, said teeth serving as bearing and driving faces S1U le to be stripped: and diametrically opposite vertical cutting means (CD) one with respect to the other with respect to said cable allowing the cutting into two opposite generatrices to ensure the appropriate detachment of the outer sheathing of the cable. -2- Stripping device according to claim 1 characterized in that it comprises a third gearmotor group (E) arranged in a horizontal plane and oriented obliquely 60 degrees relative to the first groups (AB) defining a triangulation for driving the cable ; said third group being adjustable in height according to the section of the cable to strip the cutting means (C-D) being substantially offset in three groups. -3- Means for implementing the stripping device according to any one of claims 1 and 2 characterized in that they comprise a frame (1) with a base (11) and an upper structure (12) definissa.nt the safety cover ; said structure being established with a horizontal bottom wall (2) with an opening (21) for the passage of the lower cutting tool, profiles forming the longitudinal walls (22) with a central cutout (23) for the passage of the stripping cable, profiles forming the side walls; the upper part of said structure being arranged with an opening (3) to constitute a column for guiding and holding the upper cutting tool, said side walls having for this purpose at their upper part a vertical flap (25) and squared at its end. -4- Means according to claim 3 characterized in that near each side wall are arranged and maintained support means (4) of the gear-motor groups (A-B); a V-shaped section (7) being held horizontally by a console (8) integral with the chassis for the prepositioning of the cable to be stripped towards the cutting location. -5- Means according to claim 4 characterized in that a pressure roller (9) complementary is disposed substantially below the profile (7) behind the cutting device; said roller being in variable position according to the section of the cable to be stripped. -6- Means according to claim 3 characterized in that the upper cutting tool is disposed at the lower end of a sleeve (13) internally bored (13) guided in a controlled manner in a-sheath (12) by the rod (14) of a screw (14) forming a handwheel. -7- The means of claim 6 characterized in that the upper cutting tool is a wheel or disc (17) mounted on an axis (16) support arranged in the form of a yoke (133) of said sleeve. -8 Means according to claim 6 characterized in that the cutting tool is a knife with a sharp cutting edge. -9- Means according to claim 3 characterized in that the lower cutting tool (22) is disposed in a sleeve (21) internally bored (211), said sleeve being guided in a sleeve (18) integral with the frame; the rod (201) of an operating wheel being associated with said sleeve, to ensure its adjustment in position.