Cutting element and stripping tool having a pair of cutting elements

Abstract

The present invention relates to a stripping tool having two cutting elements (4). In order to enable particularly thin cables to be stripped, the two cutting elements (4) each have a blade section and a contact section, wherein the blade (6) is formed on the blade section, wherein the contact section has a contact surface (7), and wherein the blade (6) protrudes above the contact surface (7).

Description

[0001] Krampe Immobilien GmbH & Co. KG PI250730ST Cutting element and stripping tool with a pair of cutting elements. The present invention relates to a cutting element according to the preamble of claim 1 and a stripping tool with a pair of such cutting elements according to the preamble of claim 6. Such a stripping tool is known from DE 20 2014 106 142 U1. The stripping tool has a first jaw and a second jaw connected by a hinge, wherein the first jaw comprises a first cutting element and a first contact surface, and wherein the second jaw comprises a second cutting element and a second contact surface. The jaws each consist of a single piece of plastic. The two cutting elements are each plate-shaped and are received in a mounting receptacle.The ends of the two cutting elements, protruding from the mounting brackets, each have a cutting edge. The two contact surfaces are formed on the corresponding plastic piece at the edge of the mounting bracket. The first jaw can be pivoted relative to the second jaw so that the two cutting edges penetrate the cable sheath from opposite sides until the first and second contact surfaces are in contact with the sheath. The contact surfaces prevent the two jaws from being folded further together, which would allow the cutting edges to damage the cable core. A disadvantage of such cable stripping tools is that the height of the cutting edges relative to the respective contact surfaces can vary so significantly that these variations are unacceptable for particularly thin cables, as the cable cores could be damaged during stripping.or that the cable sheaths could not be completely cut through. The present invention is based on the objective of providing a cutting element and a cable stripping tool with a pair of such cutting elements that make it possible to strip particularly thin cables. The objective of the invention is achieved by a cutting element (for a cable stripping tool) with a blade, wherein the cutting element has a blade section and a contact section, wherein the blade is formed on the blade section, wherein the contact section has a contact surface, and wherein the blade projects above the contact surface. In connection with the present invention, a blade section is a section on which a blade is formed, and a contact section is a section on which a contact surface is formed, which is designed to limit the penetration of the associated blade into the sheath of a cable by,that it makes contact with the cable. Two such cutting elements can be used in a cable stripping tool for a single- or multi-core cable. During stripping, the two cutting elements cut the sheath of a single- or multi-core cable on opposite sides. The distance by which the blades protrude from the contact surface determines how far the blades penetrate the cable. This distance is set so that the blades do not damage the core of the cable as much as possible. Preferably, the contact surface lies in a plane. In the context of the invention, "the blade protrudes from the contact surface" means that a line passing through two points on the contact surface intersects the blade at a distance from the cutting edge of the blade (i.e., passes through the blade). The blade preferably protrudes less than 500 µm, even more preferably less than 100 µm.The blade protrudes particularly far beyond the contact surface by less than 50 µm and more than 10 µm. The blade is preferably manufactured by wire forming. Preferably, the blade section and the contact section have an identical profile along their width. Preferably, the blade section and the contact section lie in the same plane. Advantageously, the distance by which the blade protrudes beyond the contact surface can be manufactured with extremely tight tolerances. This makes it possible to use the cutting element for a safe severing of the sheath of a fine cable without damaging its core. Such cables are often single-core and have a sheath.which was manufactured by dip coating. The core of the cable can have a diameter of less than 1 mm or only a few tens of micrometers. The sheath is typically a few tens of micrometers thick. In a preferred embodiment, the cutting element further comprises a mounting section. Preferably, the mounting section lies in a plane. Preferably, the plane in which the mounting section lies is oriented at an angle, most preferably at a right angle, to a plane in which the blade section and the contact section lie. Preferably, the free end of the mounting section tapers so that it can be easily inserted into a mounting receptacle. In yet another preferred embodiment, the blade section has a groove on one side of the blade that adjoins the contact section. The groove serves to receive material of the sheath.when it is compressed during cutting. Preferably, the depth of the groove with respect to the contact surface is less than 500 µm, more preferably less than 100 µm, and most particularly less than 50 µm and more than 10 µm. In connection with the invention, the depth of the groove with respect to the contact surface is the distance of a line passing through two points of the contact surface to a point at the bottom of the groove. In a further development of the latter preferred embodiment, the blade section has a marginal recess on the side opposite the groove. The marginal recess serves to receive material from the sheath when it is compressed during cutting. Preferably, the depth of the marginal recess with respect to the contact surface is less than 500 µm, more preferably less than 100 µm.especially less than 50 µm and more than 10 µm. In connection with the invention, the depth of the edge recess with respect to the contact surface is the distance of a line passing through two points of the contact surface to a point at the bottom of the edge recess. In a further preferred embodiment, the blade section and the contact section are formed in one piece. "In one piece" in this context means that the blade section and the contact section are made from a single body and not by joining several (at least two) bodies and accordingly have no join. A join is a seam that forms between two or more solid bodies, the joining parts, with a geometrically defined shape during joining, i.e., the permanent connection, of the joining parts. Joining includes riveting, clinching, and screwing, as well as welding when using a further, shapeless auxiliary material.Soldering and gluing. The problem underlying the invention is further solved by a cable stripping tool (for single- or multi-core cables) with a first jaw and a second jaw connected by a hinge, wherein the first jaw comprises a first cutting element, wherein the second jaw comprises a second cutting element, wherein the first cutting element has a first blade section and a first contact section, wherein a first blade is formed on the first blade section, wherein the first contact section has a first contact surface, and wherein the first blade projects above the first contact surface, and wherein the second cutting element has a second blade section and a second contact section, wherein a second blade is formed on the second blade section, and wherein the second contact section has a second contact surface, and wherein the second blade projects above the second contact surface.wherein the first jaw and the second jaw are movable towards each other such that the first blade and the second blade penetrate the sheath of a cable from opposite sides (essentially at or on the same level) until the first contact surface and the second contact surface bear against the cable from opposite sides (essentially at the same level). In the context of the present invention, "on the same level" means at the same longitudinal position along the cable. "Essentially at the same level" includes a deviation of up to 2 mm. The cutting elements can have the optional features of all embodiments and further developments of the cutting element according to the invention. The stripping tool can essentially have the structure known from DE 202014 106 142 U1 and differ essentially only in the cutting elements and the areas of the jaws that surround the cutting elements.The joint is a hinge, and the jaws pivot as they move towards each other. The stripping tool can also be designed as wire strippers, essentially having the structure known from DE 000009 102 476 U1, and differing essentially only in the cutting elements and the areas of the jaws surrounding the cutting elements. The joint can have any design that forces the jaws to move towards each other in a rotary, translational, or combination of rotary and translational movements. Advantageously, due to the small tolerances between the blade and the contact surface, the stripping tool is suitable for stripping particularly fine cables with thin sheaths, such as those produced by dip coating. In a preferred embodiment, the first cutting element further comprises a first retaining section.wherein the first jaw has a first mounting receptacle in which the first mounting section is received, wherein the second cutting element further has a second mounting section, and wherein the second jaw has a second mounting receptacle,in which the second mounting section is received. The invention is described in more detail below with reference to the drawings. These show: FIG. 1 a perspective view of an unfolded stripping tool; FIG. 2A a side view of the unfolded stripping tool; FIG. 2B an end view of the unfolded stripping tool; FIG. 2C a detail from FIG. 2A; FIG. 3A a side view of the folded stripping tool; FIG. 3B an end view of the folded stripping tool; FIG. 3C a sectional view along the sectioning plane AA from FIG. 3A; FIG. 3D a detail of the sectional view from FIG. 3C; FIG. 3E the same detail of the sectional view from FIG. 3C with a cable; FIG. 4A a side view of a cutting element; FIG. 4B a top view of the cutting element; and FIG. 4C a perspective view of the cutting element. FIG. 1, FIG. 2A,FIGS. 2B and 2C show a perspective view of an unfolded cable stripping tool, a side view of the unfolded cable stripping tool, an end view of the unfolded cable stripping tool, and a section from FIG. 2A, respectively. FIGS. 3A, 3B, 3C, 3D, and 3E show a side view of the folded cable stripping tool, an end view of the folded cable stripping tool, a sectional view along the sectioning plane AA from FIG. 3A, a section of the sectional view from FIG. 3C, and the same section of the sectional view from FIG. 3C with a cable. The cable stripping tool comprises two partially cylindrical jaws 1 and 2, which together form a hollow cylinder and are pivotally connected to each other by a hinge 3. A cutting element 4 is provided on the end faces of each jaw 1, 2, which serves totogether with the other cutting element 4, to cut the cable of a sheath. A cushion 5 is provided at each of the opposite ends of the jaws. The stripping tool differs from the stripping tool known from DE 202014 106 142 U1 essentially only in the cutting elements 4 and the areas of the jaws 1, 2 that surround the cutting elements 4. A detailed description of the further features and the operation of the stripping tool is therefore omitted. The cutting elements 4 are formed in one piece, are made of stainless steel and each comprises a blade section on which a blade 6 is formed, a contact section on which a contact surface 7 is formed, and a retaining section 8, which is each frictionally engaged in a retaining receptacle that is formed as a recess on one of the jaws 1,2 is formed. The blade section is located between the contact section and the mounting section 8. The blade section and the contact section each lie in the same plane. The mounting section 8 is arranged at right angles to the blade section and the contact section. The free end of the mounting section tapers so that it can be easily inserted into a mounting receptacle. The blade section, the contact section, and the mounting section 8 each have a constant profile along their width. To strip a cable 10, the blades 6 penetrate the sheath 9 from opposite sides until the contact surfaces 7 abut the cable 10. The blade section has a groove 11 on one side of the blade, adjacent to the contact section, and a marginal recess 12 on the other side. FIG. 4A,FIG. 4B and FIG. 4C show a side view of one of the cutting element 4, a top view of the cutting element 4 and a perspective view of the cutting element 4 respectively.

[0002] Reference symbol list Jaw Jaw Hinge Cutting element Cushion Blade Contact surface Mounting section Sheath Cable Groove Edge recess Core

Claims

Krampe Immobilien GmbH & Co. KG PI250730ST Patent Claims 1. Cutting element (4) with a blade (6), characterized in that the cutting element (4) has a blade section and a contact section, that the blade (6) is formed on the blade section, that the contact section has a contact surface (7), and that the blade (6) projects above the contact surface (7).

2. Cutting element (4) according to claim 1, characterized in that the cutting element (4) further comprises a retaining section (8).

3. Cutting element (4) according to claim 1 or 2, characterized in that the blade section has a groove (11) on one side of the blade (6) that adjoins the contact section.

4. Cutting element (4) according to claim 3, characterized in that the blade section has an edge recess (12) on the side opposite the groove (11). 5.Cutting element (4) according to one of claims 1 to 4, characterized in that the blade section and the contact section are formed in one piece.

6. Stripping tool with a first jaw (1) and a second jaw (2) which are connected via a joint (3), wherein the first jaw (1) encompasses a first cutting element (4), and wherein the second jaw (2) comprises a second cutting element (4), characterized in that the first cutting element (4) comprises a first blade section and a. first contact section, that a first blade (6) is formed on the first blade section, that the first contact section has a first contact surface (7), that the first blade (6) projects above the first contact surface (7), that the second cutting element (4) has a second blade section and a second contact section, that a second blade (6) is formed on the second blade section, that the second contact section has a second contact surface (7), that the second blade (6) projects above the second contact surface (7), that the first jaw (1) and the second jaw (2) are movable towards each other such that the first blade (6) and the second blade (6) penetrate the sheath (9) of a cable (10) from opposite sides until the first contact surface (7) and the second contact surface (7) are in contact with the cable (10) from opposite sides. 7.Stripping tool according to claim 6, characterized in that the first cutting element (4) further comprises a first holding section (8), that the first jaw (1) has a first holding receptacle in which the first holding section (8) is received, that the second cutting element (4) further comprises a second holding section (8), and that the first jaw (2) has a second holding receptacle in which the second holding section (8) is received.

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