CN86108638A - Wire stripper - Google Patents

Abstract

A wire stripper consisting of a body with two interconnected parts that provide relative movement between an open position and a closed position; Apparatus; a plurality of cutters mounted on the body for rotation relative to the body and positioned longitudinally and axially spaced apart from the end of said cable at particular positions, each cutter contacting and piercing said The cable ends are correspondingly spaced and correspondingly circumferentially cut around the ends upon rotation of the body and cable ends about the longitudinal axis when the body part is in the closed position.

Description

This invention relates to wire strippers, and in particular to the stripping of coaxial cables. For convenience, the invention will be described with reference to coaxial cables, but it should be understood that the invention has wide applicability.

Coaxial cable strippers used prior to the present invention were cumbersome to use and therefore unsatisfactory. In particular, such prior stripping devices require that each cut be individually manipulated or adjusted to prepare the stripped cable.

It is an object of the present invention to provide an improved cable stripper which is easy to operate and relatively simple and compact in construction.

Another object of the present invention is to provide a wire stripper capable of cutting into the cable insulation at several locations in a single operation.

According to the invention, the wire stripper comprises a main body with two interconnected parts which establish relative movement between an open position and a closed position; one for placing the cable end and positioning it on said main body; position positioning means; a plurality of cutters mounted on said body to rotate relative to said body and spaced longitudinally and axially from said cable end at said specific position, each said cutter when said body moves into said closed position Contacting and penetrating said cable end a corresponding distance at said specific location and forming a corresponding circumferential cut around said end upon rotation of said body and said cable part about said longitudinal axis when the body part is in the closed position.

Preferably the cutter is spring loaded and preferably housed in a replaceable cutter box. A stripping device having these characteristics can be constructed in various ways, but for ease of illustration here, only one particular construction which works satisfactorily will be described.

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, the drawings merely illustrate how the invention may function and, therefore, the particular form and arrangement of features shown should not limit the invention.

Fig. 1 is a plan view of a wire stripper according to an embodiment of the present invention;

Fig. 2 is a sectional view taken along line II-II in Fig. 1;

Figure 3 is similar to Figure 2, but showing the device in the unfolded state;

Fig. 4 is a sectional view taken along line IV-IV in Fig. 1;

Figure 5 is similar to Figure 4, but showing the device in the unfolded state with the cable ends positioned in the device (cutter box omitted from view);

Figure 6 is an end view of the device shown in Figure 5 viewed from the right-hand side of Figure 5;

Figure 7 is similar to Figure 6 but showing the device in the closed position;

Fig. 8 is a cross-sectional view taken along line VIII-VIII in Fig. 1;

Fig. 9 is a sectional view of the cutter box used in the device of Fig. 1;

Figure 10 is a semi-schematic perspective view of the cutter box cutter assembly shown in Figure 8;

Fig. 11 is a semi-schematic diagram of the end of the cable after stripping the device in Fig. 1 .

The wire stripper shown in the accompanying drawings comprises a hollow body 1 containing a number of disc-shaped cutters 2 (Fig. 2 and Fig. 4). These cutters are mounted for rotation about a common axis. An opening 3 ( FIG. 3 ) passes through a side wall 4 of the body 1 and forms part of the cable positioning means, where the end 5 ( FIG. 5 ) of the cable 6 can be introduced into the body 1 , substantially parallel to the axis of rotation of the cutter 2 . This device makes it possible to reduce the lateral spacing between the axis of the cutter and the axis of the cable end 5, allowing the cutter 2 to contact and penetrate the cable 6. The relative rotation of the cable 6 and the stripping device body 1 causes each cutter 2 to move around the cable end 5, producing a corresponding cut around the circumference of the end.

According to the specific structure shown in the figure, the main body 1 of the device is formed by two relatively moving parts, one is the main part 7 and the other is the cover part 8 . The relative movement between these body parts 7 and 8 enables the device to be in an open state ( FIGS. 3 and 5 ) in which the cable end 5 can be positioned within the body 1 and a closed state in which the cutter 2 contacts and penetrates the cable end 5 . state (Figure 2 and Figure 4) movement. Preferably, the two parts 7 and 8 are hinged together for relative movement around an axis of rotation 9, as shown, and a bias spring 10 can be used to press the main body parts 7 and 8 in an open or separated state, as will be described below. The latch means 11 can releasably restrain the parts 7 and 8 in the closed position.

Although the cutter 2 can be installed in the main part 7 when required, it is preferably installed in the cover part 8. Equally, as shown in the figure, the cutter preferably forms part of a replaceable cutter box 12, and There may be many such cutter boxes with different arrangements of cutters to accommodate different circumferences, i.e. each cutter box 12 may have a specific number of cutters 2 spaced laterally and/or for a particular use case. Diameters are pre-selected to suit specific applications.

In the illustrated embodiment, the main part 7 is hollow and defines a groove 13, which opens on the top side of the main part 7, through which the cable entry 3 passes through a peripheral wall 4 of the main part 7, whereby the end 5 of the cable 6 The groove 13 can be inserted. The inlet 3 is formed at one end of a cable positioning tube 14 which is connected to the peripheral wall 4 and extends laterally outward therefrom. The connection between the peripheral wall 4 and the inner end portion 15 of the positioning tube 14 enables the tube 14 to rotate about its longitudinal axis relative to the body main part 7 without detaching from this main part 7 . Likewise, the axis of the tube 14 substantially coincides with the axis of the opening 3 as shown.

The placement of the positioning tube 14 enables the cable end 5 to be inserted into the outer end 16 of the free end channel 17 formed by the tube 14 and thereby be guided into the correct position in the groove 13 of the main body part 7 . On the side of the main body part 7 opposite the cable entry 3 there is an end stop 18 which contacts the tail end of the cable 6 and thereby fixes the axial position of the cable 6 relative to the stripping device. The body part 7 also includes a support mechanism which contacts and supports the cable end 5 against deflection from the cutter 2 during the cutting operation. In the illustrated construction, the support mechanism comprises a pair of transversely spaced rollers 19 extending in the axial direction of the cable end 5 and having their axes of rotation on respective opposite sides of the cable end 5 axis.

Preferably there is a restraint mechanism which releasably secures the cable 6 against extraction from and movement relative to the tube 14 . In the illustrated form, the limiting mechanism comprises a crank lever 20 mounted on the inner end portion of the positioning tube 14 for relative movement about an axis of rotation 21 . The shaft has its axis extending transversely to the tube 14 axis. The cam 22 is connected to the lever 20 and protrudes through the hole 23 on the pipe wall, and contacts the outer surface of the cable 6 . This arrangement makes on a pivoting position of the lever 20, as shown in Figure 5, the cam 22 contacts the cable 6 and firmly clamps the cable 6 to prevent disengagement from the stripping device, while on the other side of the lever 20 In the rotational position of the shaft, as shown in FIG. 4 , the cam 22 is clear of the cable 6 , allowing the cable 6 to pass freely through the tube 14 .

The cover part of the main body 1 is preferably pivotally connected to the main part 7 at a position close to the main body 1 side. It is often convenient, but not necessary, to have the axis of the shaft 9 parallel to the longitudinal axis of the cable end 5 located on the body 1 . The cover member 8 is arranged to be pivotable into and out of a closed position (FIG. 2) in which the member 8 overlaps the open top of the main member 7 and thereby substantially closes the device body 1. The biasing spring 10 that presses the parts 7 and 8 into their extended position (Fig. 3) may consist of a helical spring 24 located around a pin forming the axis of rotation 9 and connecting the parts 7 and 8, two transversely opposite helical springs 24 The end extends and contacts the arms 25 and 26 of the respective one of the parts 7 and 8 .

The latch means 11 holding the parts 7 and 8 in the closed position comprises a detent lever 27 which is pivotally connected to the main part 7 and which extends laterally outwardly from the part 7, the top 29 of which is Through the opening 30 on the cover member 8 when the device is in the closed position and a detent 31 engages a surface of the cover member 8 to prevent the opening movement of the cover member 8, a spring 32 or other elastic means may act on On the lever 27, it is moved about the axis of rotation 33 in the locking direction towards the position where the above-mentioned contact occurs. The lever top 29 is easily accessible from the outside to the cover part 8 so that it can be manually moved in the opposite direction and thus free the cover part 8 to open. Other forms of latch locking means are also suitable, if desired.

The cutter case 12 is located in the cover part 8 and contains the disc cutter 2 . In the particular configuration shown, there are three cutter discs 34, 35 and 36 in the set of cutters 2 carried by the cutter box 12 and they are integrally formed with a cylindrical shaft or sleeve 37, the cutter discs 34, 35 and 36 are spaced laterally in the axial direction of the sleeve 37 and each cutter has a different diameter, and the sleeve 37 is rotatably installed on the cutter box 12, so that the cutter 2 is easily installed in the cutter box 12 installed state. Touch the cable. Likewise, the axis of rotation of the sleeve 37 is parallel to the axis of rotation of the rollers 19 and the tube 14 is positioned in a plane passing between the two rollers 19 .

In the installed condition of the cutter box 12 , the smaller cutter disc 34 is generally located adjacent to the positioning tube 14 , while the larger diameter cutter disc 36 is located away from the positioning tube 14 . Any suitable means may be used to releasably hold the cutter case 12 in assembly with the cover member 8 . However, in the illustrated construction, the connection between the cutter box mouth and the cover member 8 is such that a certain relative movement is allowed. In this way, the cutter box 12 can be moved into and out of a rest position in which the cutter 2 penetrates the cable 6 to a maximum extent. Preferably a spring 38 (FIG. 5) or other resilient means acts between the cover member 8 and the cutter case 12 to hold the cutter case 12 normally in the rest position.

As mentioned above, preferably the cutter box 12 is detachably mounted on the main body 1 and can be replaced by different cutter arrangements. In the illustrated structure, the end 39 of the cutter box 12 has a long hole 40 ( FIG. 9 ), in which the pivot pin 9 attached to the main body 1 is slidably placed. Any suitable means may be used to releasably hold the cutter box 12 in such a way that it cannot be detached from the pivot pin 9 . In the illustrated structure, a limiting pin 41 is included, which is connected to the cover member 8 at one end 42 and extends into an opening 44 of the cutter box 12 at the other end 43 . A cross rod 45 extends transversely from the pin end 43 and the opening 44 is arranged so that the rod 45 cannot pass through the hole unless the pin 41 has a specific rotational position relative to the cutter box 12 . When the pin 41 is in this rotational position, the cutter box 12 can be swung down past the normal rest position, the pin 41 is disengaged and the pivot pin 9 can be slid out.

Because the cross rod 45 is in contact with the lower surface of the cutter box 12, the rest position of the cutter box is fixed by the cross rod 45. If desired, a pin 41 can be screwed onto the cover 8 to ensure adjustment of the corresponding axial position of the rod 45 and thereby change the rest position of the cutter box. Other devices can also be used for this purpose.

Preferably, the cutting knife 2 is restricted so as not to rotate in one direction relative to the cover member 8. In the illustrated structure, this function is achieved by a clutch device. The clutch device works automatically when it cannot prevent the cutter 2 from rotating in the above-mentioned direction. The advantage of such an arrangement is the use of different cutting actions for the different materials that may be encountered in the cable 6 . According to the structure shown schematically in FIG. 10 , the clutch means comprises a helical spring 46 positioned neatly around the cutter sleeve 37 and hooked onto the cutter case 1 by an arm 47 extending transversely from one end of the helical spring 46 . There is a degree of frictional contact between the coil spring 46 and the sleeve 37 .

The above-mentioned device makes the clutch device correspond to the direction of the rotational torque acting on the cutter sleeve 37, that is, when the cutter 2 rotates the shaft in one direction, the coil spring 46 has the minimum resistance to rotation, but when the cutter 2 rotates in the opposite direction When rotating in the opposite direction, the reaction between the sleeve 37 and the coil spring 46 causes the coil spring 46 to hug the sleeve 37 more tightly and thereby clamp the sleeve 37 so that it cannot rotate. This clamping engagement is automatically released when the effect of rotation of the cutter 2 is removed or when the cutter 2 is rotated in the above-mentioned first direction. Obviously, other forms of clutches can also be used for the above purpose.

The cable end stopper 18 is preferably in the form of a lever, as shown in FIGS. 6 and 7, which is connected to the cover member 8 to move therewith. In the open state of the main body 1, the end 48 of the lever 18 overlaps the opening 49 formed by the side wall 50 of the body part 7 opposite to the wall 4, and the cable end 5 can be placed in the opening 49, opposite to the end 48 of the lever. Contact and thereby fix the axial position of the cable 6 . However, when the main body 1 is closed, the lever 18 swings out of the opening 49 and thereby prevents the outward axial movement of the cable 6, which has the advantage of allowing the axial expansion of the cable 6 during the cutting operation and thereby avoiding the possibility of breaking the cable 6 or end loads that affect the cleanliness of the stripping operation.

As shown, there is preferably a second stop for the operative position in which the second stop rests on the opening 49 when the body parts 7 and 8 are closed. The second stop may be a plate 57 fixed to or integrally formed with the cover member 8 and overlapping the opening 49 in the closed position of the main body 1 rather than in the open position. The plate 57 is axially aligned with the cable 6 when the body part is in the closed position, but its innermost surface is further outward from the wall 50 than the innermost surface of the lever end 48, i.e. the gap between the stop plate 57 and the wall 50 is greater than There is a gap between the stop lever 18 and the wall 50 . Thus, the plate 57 does not substantially hinder the above-mentioned axial expansion of the cable 6, but it can contact the end of the cable 6 during the cutting operation.

When it is necessary to position the cable end 5 in the main body 1, the device main body 1 is opened and the lever 20 is in the position shown in FIG. 4 . This end 5 is inserted into the positioning tube 14 until its end hits the stop 18, the positioning of which is shown in FIG. 6 . Then, the lever 20 is swung to the position shown in FIG. 5 to clamp the cable 6 , and the cover part 8 is then swung towards the main part 7 of the main body 1 . During this movement, the stop 18 automatically moves to the position shown in FIG. 7 . Likewise, at least the largest cutter disc 36 bites the outer surface of the cable end 5 . Continued closing causes the cutting blade disc 36 to penetrate the cable 6, and possibly the other cutter discs 34 and 35, but due to the elastic mounting of the cutter housing 12, the cutter housing 12 drops somewhat into the cover part 8. In the fully closed state of the main body 1, the latch 11 automatically keeps it closed. The user then holds the tube 14 and turns the main body 1 relative to the cable 6, with the tube 14 acting as a handle and the main body 1 being manipulated by the other hand, the finger loop 51 can be on one of the parts 7 and 8 to facilitate the above Operation, that is, the user holds the positioning tube 14 with one hand, and holds the finger ring 51 with the other hand.

When the body 1 is rotated relative to the tube 14 and the cable 6, each cutter disc 34, 35 and 36 moves along the circumference of the cable end 5 and cuts into the cable insulation. The depth of each such cut can be increased by repeating the corresponding rotation of the main body 1, since the resistance of the cutter box 12 towards its rest position or minimum lowered position is gradually reduced. The cutter 2 is preselected so that, in the minimum lowered position of the cutter box 12, the cutter discs 34, 35 and 36 will already have cut into the cable 6 to the required depth. In one example case, the smallest cutter disc 34 will have cut through the outer insulation 52 of the cable 6 ( FIG. 11 ), and the middle cutter disc 35 will have pierced the metal shield between the two insulation layers 52 and 54 , and the big cutter box 36 will have pierced to the core 55 of the cable 6 (that is: the metal wire).

The lever 20 is then released so that the length of the cable 6 can be extracted out of the positioning tube 14 . This action automatically strips the cable end 5 from each of the three cuts, since the cutter 2 remains embedded in the cable 6 and thus acts as a stripping member.

When the cable 6 is completely drawn out, there is an exposed length of the core wire 55 at the extreme end, an exposed length of the inner insulating layer 54 separated from the end 56, an exposed length of the metal shielding layer 53 further separated from the end 56, As shown in Figure 11. Different arrangements will result from the use of different cutter assemblies.

If desired, the cable end stop plate 57 may be provided with a plunger (not shown) which is easily accessible from the outside of the main body 1 and which can be lowered to allow possible jamming in the device adjacent to the stop plate 5). Chip removal. The opening of the main body 1 allows the swarf to escape, making the device ready for the next operation.

The above-mentioned device is quite simple in structure and extremely convenient to operate. Its unique advantage is that the device can perform a series of cuts in one operation without the need for individual adjustments for each cut as with prior devices of the type.

Without departing from the spirit and scope defined in the appended claims of the present invention, various changes, modifications and/or additions can be introduced into the above structures and arrangements of components.

Claims (29)

1, a kind of wire stripper comprises a main body that two interconnected parts are arranged, and two parts are formed on the relative motion between deployed position and the off-position; The positioner placing cable end and above-mentioned end is positioned at an ad-hoc location on the aforementioned body; Many being installed on the aforementioned body with respect to the main body rotation and to be positioned at the vertical axially spaced cutting knife of above-mentioned cable end on the above-mentioned ad-hoc location, each above-mentioned cutting knife is when aforementioned body moves into above-mentioned off-position, contact and thrust above-mentioned cable end respective distance at above-mentioned ad-hoc location, and when main element is in the closed position, rotate around above-mentioned longitudinal axis according to aforementioned body and above-mentioned cable end, form corresponding circumferential notch around above-mentioned end.

2, wire stripper according to claim 1 is characterized in that, two above-mentioned cutting knifes is installed is at least rotated around a common axis.

3, wire stripper according to claim 1 is characterized in that, above-mentioned each cutting knife diameter has nothing in common with each other.

4, wire stripper according to claim 1, it is characterized in that, above-mentioned each cutting knife is installed on the aforementioned body, can move into and shift out a resting position, in this position, above-mentioned cutting knife thrusts above-mentioned cable end to greatest extent, and bias unit will force each above-mentioned cutting knife to enter above-mentioned resting position.

5, wire stripper according to claim 1 is characterized in that, the end-stop devices contact is positioned at the end of the above-mentioned cable end of above-mentioned ad-hoc location, and the axial location of above-mentioned end is fixed.

6, wire stripper according to claim 5, it is characterized in that, above-mentioned end-stop devices can move into and shift out the service position, and in this position, above-mentioned retaining device contact above-mentioned end also moves towards above-mentioned deployed position according to aforementioned body and to shift out above-mentioned service position.

7, wire stripper according to claim 6, it is characterized in that, second end-stop devices aimed at above-mentioned end when the aforementioned body parts are positioned at off-position, above-mentioned second retaining device separates with above-mentioned longitudinal axis direction and the position of being determined by above-mentioned first retaining device when main element is positioned at deployed position, above-mentioned second retaining device shifts out the above-mentioned position that axially aligns according to the motion of aforementioned body parts towards above-mentioned deployed position.

8, wire stripper according to claim 1, it is characterized in that, two removable end retaining devices are arranged on aforementioned body, an above-mentioned end-stop devices moves into and shifts out the motion of above-mentioned deployed position respectively according to the aforementioned body parts, move into and shift out above-mentioned service position, above-mentioned another end-stop devices moves into and shifts out the motion of above-mentioned off-position respectively according to the aforementioned body parts, move into and shift out above-mentioned service position, above-mentioned each end-stop devices is when its relevant work position, be stacked in the end of above-mentioned cable end, and the service position of an above-mentioned end-stop devices at above-mentioned longitudinal axis to separating with another end-stop devices.

9, wire stripper according to claim 1 is characterized in that, above-mentioned cutting knife can be removed from aforementioned body, so that exchange with other group cutting knifes.

10, wire stripper according to claim 9 is characterized in that, above-mentioned cutting knife is arranged with single group, and forms the parts of a cutter box, and this cutter box can be connected on the aforementioned body parts with discharging.

11, wire stripper according to claim 10, it is characterized in that, above-mentioned cutter box is installed on the above-mentioned main element, correspondingly move into and shift out a resting position, in this position, above-mentioned cutting knife thrusts above-mentioned cable end separately to greatest extent, and bias unit acts between an above-mentioned cutter box and the above-mentioned main element, forces above-mentioned cutter box to enter above-mentioned resting position.

12, wire stripper according to claim 11 is characterized in that, above-mentioned cutter box is installed in the aforementioned body parts, and around an axle corresponding sports, releasable restraint device can be removed above-mentioned cutter box from above-mentioned rotating shaft installed part.

13, wire stripper according to claim 12 is characterized in that, above-mentioned restraint device equally also works to set up above-mentioned resting position.

14, wire stripper according to claim 11 is characterized in that, has an adjusting device to regulate the location of above-mentioned resting position with respect to an above-mentioned main element.

15, wire stripper according to claim 13 is characterized in that, above-mentioned restraint device is adjustable, to change the location of above-mentioned resting position with respect to an above-mentioned main element.

16, wire stripper according to claim 1 is characterized in that, has a device to stop each above-mentioned cutting knife to rotate with respect to the aforementioned body parts with a direction at least.

17, wire stripper according to claim 16 is characterized in that, above-mentioned cutting knife is interconnected, can not relatively rotate, and above-mentioned rotation limiter is the form of arrangement of clutch, according to the rotary torque that acts on the cutting knife, or stops or allows above-mentioned cutting knife to rotate by this torque direction.

18, wire stripper according to claim 17, it is characterized in that above-mentioned cutting knife all is fixed on the axle, rotate with this axle, above-mentioned arrangement of clutch comprises one around the helical spring of above-mentioned axle with tight fit relation location, and an arm extends and the contact aforementioned body from this spring one end.

19, wire stripper according to claim 1, it is characterized in that, above-mentioned cutting knife is installed on the above-mentioned main element, above-mentioned positioner is on another aforementioned body parts, above-mentioned positioning element comprises an opening by above-mentioned another main element, the bracing or strutting arrangement that is used for placing above-mentioned cable end slidably and is positioned at above-mentioned another main element, this bracing or strutting arrangement is used to support above-mentioned end, when main element moves into above-mentioned off-position, make above-mentioned end can not leave cutting knife.

20, wire stripper according to claim 19 is characterized in that, above-mentioned bracing or strutting arrangement comprises a pair of roller, the axle that is installed in above-mentioned another main element with the relation that is spaced laterally apart movably and has it to extend with above-mentioned longitudinal axis direction basically.

21, wire stripper according to claim 19.It is characterized in that another opening forms by the wall with respect to the first side wall on above-mentioned another main element, end-stop devices is in the outside location of relative wall, and contact is positioned at the cable end end on the above-mentioned ad-hoc location.

22, wire stripper according to claim 21 is characterized in that, above-mentioned end-stop devices can move into and shift out a service position, in this position, and the contact above-mentioned end.

23, wire stripper according to claim 19 is characterized in that, a handle is connected on above-mentioned another main element, and can rotate with respect to above-mentioned another main element around an axle, and this axle is arranged essentially parallel to above-mentioned longitudinal axis.

24, wire stripper according to claim 23 is characterized in that, above-mentioned handle is connected on the above-mentioned wall and from above-mentioned wall and laterally stretches out.

25, wire stripper according to claim 23, it is characterized in that, the axle that the free end passage extends and has it to overlap with above-mentioned longitudinal axis basically by above-mentioned handle, but releasing limiting device is arranged on handle and can contact the cable that passes above-mentioned passage, clamp this cable, prevent that it from moving with respect to above-mentioned handle.

26, wire stripper according to claim 25 is characterized in that, above-mentioned restraint device comprise one sway be installed in above-mentioned handle with one with the cam that links to each other with lever, can move therebetween on lever and contact with above-mentioned cable.

27, wire stripper according to claim 1 is characterized in that, the aforementioned body parts connect with swaying, so that relative motion.

28, wire stripper according to claim 1 is characterized in that, latch gear can be clamped in above-mentioned off-position with the aforementioned body parts releasedly.

29, wire stripper according to claim 1 is characterized in that, spring assembly forces the aforementioned body parts towards above-mentioned deployed position.

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