CH711489B1 - Scabbard for the blade of a hand cutting tool and associated cutting tool. - Google Patents

Abstract

The invention relates to a sheath (20) intended to receive the blade (12) of a hand cutting tool, comprising a wall (24) delimiting a housing (22) between a first open end for the introduction and the exit. of the blade (12) and a second end. Typically, the second end comprises a reversible locking system (26) able to cooperate with the blade (12) for retaining the blade (12) in the sheath (20). The invention also relates to a hand cutting tool (10) capable of being received by said sheath (20).

Description

Description

Technical Field [0001] The present invention relates to the field of hand cutting tools having a blade and a gripping element, such as a handle or a handle, on which the blade is mounted. In particular, without limitation, the present invention relates to saws (such as hand saws, Japanese saws, counter saws ...) but also other cutting objects with a fitted blade, and in particular cutting instruments such as knives, cutters, razors, scalpels, scissors (single blade tool or pair of scissors forming a tool with double articulated blades), ...

To limit accidents with the sharp blade and facilitate the wearing and / or transportation of such cutting tools, the latter are often associated with a sheath serving as a protective sheath for the blade. To ensure reliable protection, the blade must be effectively retained in the sheath, so that it cannot be separated from the sheath unexpectedly, regardless of the position of the tool.

Furthermore, it must be possible to separate the blade from the sheath without great effort and then, after each use of the cutting tool, attach the tool to the sheath in an easy and safe way.

State of the art Documents US 2014 059 870, JP 2005 131 073 and TWM 321 363 U describe frameless saws and their sheaths which can be attached to one another by cooperating retaining elements between them and located on the one hand at the level of the opening of the sheath and on the other hand in the zone connecting the handle to the saw blade.

Documents US 5,092,046, US 5,297,341, US 6,138,363 and US 7,434,316 describe similar blocking systems for reversibly locking a knife and its protective case for the blade.

These attachment systems between a sheath and a blade tool require, to disengage the blade from the sheath, and very often also to block the blade in the sheath, special handling, requiring on the part of the user a maneuver requiring precision and taking time. This situation is particularly awkward when the user is required to exit and return the blade from the sheath repeatedly and frequently.

Brief Summary of the Invention An object of the present invention is to provide a sheath free from the limitations of known sheaths, and the associated cutting tool.

Another object of the invention is to provide an easy-to-use sheath, which does not require any specific operation to unlock the attachment system between the tool and the sheath when it is desired to release the blade out scabbard and vice versa.

According to the invention, these objects are achieved in particular by means of a sheath intended to receive the blade of a hand cutting tool, comprising a wall delimiting a housing between a first open end for the introduction and the blade outlet and a second end. In particular, said second end comprises a reversible blocking system able to cooperate with the blade for retaining the blade in the sheath.

This solution has the particular advantage over the prior art of providing a blocking system which is not located at the location of the opening of the sheath.

According to the invention, the blocking system between the sheath and the blade locks / unlocks automatically during the introduction of the blade into the sheath, by the single push of the tool in the housing of the sheath, respectively during the extraction of the blade from the sheath, by the only movement of separation by pulling the tool relative to the sheath.

Thus, it is understood that advantageously, it is the movement of entry of the blade which locks the locking system of the sheath on the blade and it is the movement of exit of the blade which unlocks the system of locking, releasing the blade by the same movement.

Consequently, the locking operation of the sheath blocking system on the blade requires a movement similar to that of the entry of the blade into the sheath. This locking operation between the scabbard and the blade can be carried out, in the continuity of the movement of entry of the blade into the scabbard, namely with two hands and by bringing the two hands together, one on the handle and the other on the scabbard. In the same way, the maneuver for unlocking the locking system of the sheath relative to the blade requires a movement similar to that of the output of the blade from the sheath. This unlocking operation between the sheath and the blade can be carried out, in the initial phase of the blade's movement out of the sheath, namely for example with one hand: the hand enclosing the handle of the tool, in particular by all fingers except the thumb, and pushing the sheath around the blade, by spreading the sheath by pushing its open end from the tip of the thumb.

CH 711 489 B1 Preferably, the blade of the tool or the instrument is elongated, and is preferably straight or curved. Thus, in this situation, the blade has a longitudinal direction or main direction and the pushing movement of the tool by its gripping element for locking the blade, as well as the pulling movement of the tool by its element gripping for unlocking the blade is effected substantially in this longitudinal direction.

According to a preferred arrangement, the blocking system comprises a projecting element disposed in the housing and capable of passing reversibly from an advanced position, in which said projecting element is able to cooperate with the blade by blocking the longitudinal position of the blade in the sheath, in a retracted position, in which the blade is free to move in the longitudinal direction in the housing. In this configuration, it is thanks to this projecting element which comes to cooperate by contact with the blade of the cutting tool, that the blade is blocked in the sheath.

Furthermore, according to another preferred arrangement, the locking system further comprises elastic means tending to bring said projecting element into its advanced portion. In this case, the elastic means make it possible to withdraw the protruding element from the housing, by passing into the retracted position and maintaining the protruding element for a short period of time in this retracted position, thereby allowing the movement of the blade in the sheath, either at the inlet or at the outlet.

Also, according to yet another preferred arrangement, the blocking system further comprises a tip forming a lever covering a portion of the second end of the wall of the sheath, said tip pivoting about an axis of rotation orthogonal to the direction main of the sheath, the projecting element and said elastic means being mounted on said end piece, on either side of said axis of rotation. In this way, a rocking system is produced around the axis of rotation, one end of the rocker carrying the protruding element and the other end of the rocker carrying the elastic means tending to return the protruding element to its position. advanced.

Also, the present invention relates to a hand cutting tool capable of being received in a sheath as described in the present text, comprising a blade and a gripping means attached to the blade, in which the blade is equipped retaining means capable of cooperating with the locking system of said sheath for retaining the blade in the sheath in the advanced position of said protruding element, in order to achieve locking between the locking system of the sheath and the protruding element of the blade. Of course, conversely, the retaining means disposed on the blade are able to cooperate with the locking system of said sheath for the separation between the blade and the sheath, in the retracted position of said projecting element, and this in order to achieve the unlocking between the sheath blocking system and the projecting element of the blade.

Brief description of the figures An example of implementation of the invention is indicated in the description illustrated by the appended figures in which:

fig. 1 illustrates in perspective a cutting tool formed by a curved blade saw, stored in its sheath according to the invention, fig. 2 illustrates in detail the detail II of FIG. 1 fig. 3 represents the saw without its sheath, in lateral projection, fig. 4 is a view in longitudinal section of the saw and sheath assembly, in the locked position, fig. 5 illustrates in detail the detail IV of FIG. 4, showing the free end of the blade in the second end of the sheath, the projecting element being in its advanced position, fig. 6 is a detail view similar to that of FIG. 5, without the blade, fig. 7 is a detail view similar to that of FIG. 6, with the protruding element in its retracted position, fig. 8 is a side view from the side of the sheath and of the saw mounted in the sheath, with a partial section of the second end of the sheath, fig. 9 and 10 are side views from the side of the sheath alone, with a partial section of the second end of the sheath, respectively in the advanced position and the retracted position of the projecting element, and fig. 11 is a partial exploded view of the sheath showing the components of the locking system.

Example (s) of embodiment of the invention As seen in Figs. 1, 3 and 4, in the illustrated embodiment, the cutting tool 10 is a hand saw with a curved blade 12 fitted on a handle 14. This blade 12 extends between a first end 121

CH 711 489 B1 attached to the handle 14 and a second free end 122. This flat blade 12 has a toothed edge 12a forming the cutting edge (at the bottom in FIGS. 1,3 and 4 with a concave shape) and a smooth edge 12b (above in figs. 1, 3 and 4 with a convex shape). These two edges 12a, 12b extend in the longitudinal L or main direction of the blade 12 of the saw (see fig, 3).

As can be seen in Figs. 1, 4 and 8 to 10, the cutting tool 10 is optionally equipped with a hooking element 16 such as a strap, mounted on the first end 201 of the sleeve 20, to facilitate the attachment of the tool cutting 10 housed in its sheath 20, for example on the user's belt.

In particular, the blade 12 is equipped with retaining means 13 adapted to cooperate with the locking system of a sheath 20 for retaining the blade 12 in the sheath 20, as will be described in more detail below. -after.

Also, as seen in particular in Figs. 3, 4 and 5, the retaining means 13 are arranged on the portion of the blade 12 comprising the free end 122 of the blade. Alternatively, according to an arrangement not shown, the retaining means are not disposed on the portion comprising the second end 122 of the blade 12, but on another portion of the blade 12, for example a central portion, disposed between the first end 121 and the second end 122 or free end.

Furthermore, as seen in particular in FIGS. 3, 4 and 5, the retaining means 13 are arranged on the edge of the blade 12, in this case on the smooth edge 12b. Alternatively, according to an arrangement not shown, the blade 12 may have teeth along the two edges, that is to say on the two edges, and in this case the retaining means 13 are arranged on one either of the borders.

Also, in the illustrated embodiment, as seen in particular in Figs. 3, 4 and 5, the retaining means 13 comprise a notch capable of reversibly receiving a projecting element present in the housing of the sleeve 20, as will be described in more detail below. This notch can have a variable size and shape, adapted to the position, size and shape of this projecting element.

Thus, in this example, said cutting tool 10 is a saw whose blade 12 has a toothed edge along one of the edges 12a of the blade and the opposite edge 12b of the blade has said retaining means 13 intended to cooperate with the sheath 20 for locking and unlocking between the blade 12 and the sheath 20.

In the illustrated embodiment, as seen in particular in Figs. 4, 6, 8 and 10, the sheath 20 has a curved shape. In general, the sheath 20 has a shape and dimensions allowing the blade 12 to be placed entirely in the housing 22 delimited by the wall 24 of the sheath 20, entering it from an opening 23 delimiting the entry of the sheath 20 (on the left in figs 1,4, 8, 9 and 10).

In the example illustrated, the wall 24 of the sheath follows the curved outline of the blade 12 and the flattened shape of this blade 12. For this purpose, the wall 24 breaks down into two substantially plane side walls 241 and 242, intended to cover the two flat faces of the blade 12, and in two edge walls 243, 244 intended to cover the two edges 12a, 12b of the blade 12. These two edge walls 243 and 244 have for this purpose a curvilinear profile in section. As seen in the example illustrated, the external face of these two edge walls 243 and 244 is equipped with a loop 246 allowing the attachment of the sheath, in particular on the user's leg.

Thus, the wall 24 of the sleeve 20 comprises, extending between the first end 201 and the second end 202, two side walls 241 and 242 (forming the sides of the sleeve 20) of substantially flattened shape and parallel to each other , and two edge walls (forming the edges of the sheath 20) connecting together the two side walls 241 and 242.

These two side walls 241 and 242 and one (243) of these two edge walls extend in the longitudinal direction L, between a first end 201 and a second end 202, over a length at least equal at, and in this case a little longer than, the length of the blade 12. The other edge wall 244 (at the top in FIGS. 1,4, 8, 9 and 10) is shorter at 1 'location of its first end 201 because a longitudinal indentation 245 extends the opening 23 (on the left in figs 1,4, 8, 9 and 10). Thus, the opening 23 of the first end 201 is extended on the wall 24 at the location of a notch 245 replacing a portion of at least one of the edge walls 243, 244. In this way, thanks to the extension by the notch 245 of the opening 23, set back from the first end 201, it facilitates the entry of the blade 12 into the sheath 20 and the exit of the blade 12 from the sheath 20 in certain configurations: thus , in particular when the sheath is attached to the user's belt, this extension along the side of the sheath 20 of the opening 23 reduces the amplitude upward of the arm movement carried out by the user, for improved comfort during this operation.

The second end 202 of the sheath 20 is equipped with the locking system 26, intended to cooperate with the retaining means 13 of the blade 12 of the saw 10, formed from the notch in the example illustrated, in view of reversibly block the position of the blade 12 in the sheath 20.

More specifically, the locking system 26 includes a tip 261 forming a lever covering a portion of the second end 202 of the wall 24 of the sleeve 20. In the example illustrated, as can be seen in FIGS. 1, 2 and 4 to 11, and in particular in FIGS. 5 to 7 and 11, the endpiece 261 covers the recessed end portion 247 of the second end 202 of the wall 24 of the sheath 20, partially covering the upper edge wall 244 and the two side walls 241 and 242, and in particular an end zone of the upper edge wall 244 and of the two side walls

CH 711 489 B1

241 and 242. This endpiece 261 forms a lever pivoting about an axis of rotation (materialized by the shaft 262) orthogonal to the main direction L of the sleeve 20. In particular, this axis of rotation is orthogonal to the two side walls 241 and 242, by means of the rotation shaft 262 disposed through the end piece 261 and said recessed portion 247, at the location of a central section of the end piece 261, respectively in passages 261a of the end piece 261 and a passage 249 of the recessed portion 247.

Furthermore, a projecting element 264, for example a rod, and elastic return means 266, for example a compression spring, are mounted on said end piece 261, on either side of said shaft 262. Thus, in the rest position of the endpiece 261, as shown in FIGS. 5 and 6, said projecting element formed by the rod 264 is positioned downwards. In fig. 7 and 10, the end piece 261 is in the other position, with the rod 264 raised, and the spring 266 compressed: this other position is obtained after rocking the end piece 261 around the shaft 262, by pressing the smooth edge 12b of the blade against the rod, during the movement of introduction of the blade 12 into the sheath 20 or during the movement of extraction of the blade from the sheath 20. In this case, the smooth edge 12b of the blade keeps the rod raised and exerts with the rod a force which counterbalances that of the compression spring 266. During this advancing movement of the blade 12, when the notch 248 arrives at the location of the rod 264, the latter automatically descends by being housed in the notch 13 by which the blade 12 is locked according to a reversible blocking in the sheath 20, and this under the effect of the force exerted by the spring 266, which allows the pivoting of the nozzle 261 around of the shaft 262 and the descent of the rod in notch 13.

Thus, according to the illustrated embodiment, elastic means are used comprising said compression spring 266 disposed at the location of a distal section of the endpiece 261 which corresponds to the second end 202 of the sheath 20, said spring 266 extending between the internal face of the endpiece 261 and the external face of the portion 247 of the wall 24 of the sleeve 20. Other types of elastic means can be used, such as an elastic blade.

Also, in the example illustrated, said projecting element comprises a rod 264 extending in said housing 22 and in the notch 248 parallel to said axis of rotation (the shaft 262) and orthogonal to the two side walls 241 and 242. More specifically, the two ends of the rod 264 are fitted with passage holes 261 b present in the proximal section of the endpiece 261 which is spaced from the second end 202 of the sheath 20. This blocking rod 264 could be replaced by another type of protruding element, such as a tongue.

Furthermore, the portion 247 of the wall 24 of the sheath 20 comprises the notch 248 (see FIGS. 5 to 7 and 11) allowing, when said end piece 261 switches around said axis of rotation (the shaft 262), the displacement of the rod 264 between said advanced position, in which the locking rod 264 is housed in the notch 248 and retains the blade 12 in the sheath 20, in said retracted position, in which the rod 264 allows the blade to pass 12 in the housing 22. In the advanced position, or rest position of the rod 264, the rod 264 comes to bear on the bottom of the notch 248 and / or the proximal section of the endpiece 261 (which is turned towards the first end 201 of the sleeve 20) bears on the recessed portion 247 of the wall 24 of the sleeve 20.

Preferably, as seen in particular in FIG. 11 and in FIGS. 5 to 7, the end portion 247 has an outer face set back with respect to the rest of the outer face of the wall 24 of the sleeve 20. This configuration is obtained with a thickness of wall thinned to allow the fitting of the end piece 261 with the external face of the end piece 261 substantially flush with the external face of the rest of the wall 24, and in particular of the crest wall 244 and of the two side walls 241 and 242.

According to another preferred arrangement, as seen in particular in FIGS. 1 and 4, the sleeve 20 further comprises, towards its first end 201, an element 28 freely rotatable about an axis of rotation orthogonal to the side walls 241 and 242, such as a roller, disposed in an opening in the wall lower edge 243. This element 28 is disposed flush with the internal face of the lower edge wall 243. Such a rolling element 28 allows the blade 12 to be guided during its movement relative to the sheath 20, while avoiding wear and tear of the zone of the wall 24 of the sheath opposite the cutting edge 12a of the blade 12 by friction with this cutting edge 12a. In the example illustrated, the roller is therefore close to the opening 23, on the side of the first end 201 of the sleeve 20 opposite the notch 25.

The saw 10 and the sheath 20, optionally equipped with the fastener 16, form a cutting assembly 100.

Reference numbers used in the figures [0040]

L Longitudinal direction

100 Cutting set

Cutting tool (saw)

Blade

121 First end

CH 711 489 B1

122 Second end

12a Sharp edge

12b Smooth border

Restraint means (notch)

Handle

Hanging element (strap)

Scabbard

201 First end

202 Second end

Housing

Opening

Wall

241 Side wall

242 Side wall

243 Edge wall

244 Edge wall

245 indentation

246 Loop

247 Terminal portion recessed

248 Hack

249 Passage

Blocking system

261 End cap

261 a Passage

261 b Hole

261 c Ergot

262 Rotation axis

264 Locking rod

266 Freely rotating element spring (guide roller)

Claims (10)

claims 1. Sheath (20) intended to receive the blade (12) of a hand cutting tool, comprising a wall (24) delimiting a housing (22) between a first end (201) open for the introduction and the exit of the blade (12) and a second end (202), characterized in that said second end (202) comprises a reversible locking system (26) able to cooperate with the blade (12) for retaining the blade (12 ) in the sheath (20). 2. scabbard (20) according to claim 1, wherein the locking system (26) comprises a projecting element (264) disposed in the housing (22) and adapted to pass reversibly from an advanced position, wherein said projecting element (264) is able to cooperate with the blade (12) by blocking the longitudinal position of the blade (12) in the CH 711 489 B1 sleeve (20), in a retracted position, in which the blade (12) is free to move in the longitudinal direction in the housing (22). 3. Sheath (20) according to claim 2, wherein the locking system (26) further comprises elastic means (266) tending to bring said projecting element (264) in its advanced portion. 4. scabbard (20) according to claim 3, in which the locking system (26) further comprises an end piece (261) forming a lever covering a portion of the second end (202) of the wall (24), said end piece ( 261) pivoting about an axis of rotation orthogonal to the main direction of the sleeve (20), the projecting element (264) and said elastic means (266) being mounted on said end piece (261), on either side of said axis of rotation. 5. Sheath (20) according to one of claims 1 to 4, wherein the wall (24) of the sheath (20) comprises, extending between the first end (201) and the second end (202), two side walls (241,242) of substantially flattened shape and parallel to each other, and two edge walls (243, 244) connecting together the two side walls (241,242). 6. Sheath (20) according to one of claims 1 to 5, wherein the opening (23) extends on the wall (24) at the location of a notch (245). 7. scabbard (20) according to one of claims 5 and 6, further comprising an element (28) freely rotatable about an axis of rotation orthogonal to the side walls (241,242) disposed flush with the inner face of an edge wall (243) so as to allow the guiding of a blade (12) of the cutting tool during its movement relative to the sheath (20), while preventing wear on the area of the wall (24) of the sheath facing a sharp edge (12a) of the blade (12) by friction with said sharp edge (12a). 8. Hand cutting tool (10) capable of being received in a sheath (20) according to one of claims 1 to 7, said cutting tool comprising a blade and a gripping element (14) attached to the blade ( 12), in which the blade (12) is equipped with retaining means (13) able to cooperate with the locking system (26) of said sheath (20) for retaining the blade (12) in the sheath (20) . 9. Cutting tool (10) according to claim 8, in which the retaining means (13) are arranged on the portion of the blade (12) comprising the free end of the blade (12) or in which the means for retainers (13) are arranged on the edge of the blade (12). 10. Cutting tool (10) according to one of claims 8 and 9, wherein the retaining means (13) comprise a notch capable of receiving a projecting element (264) of said sheath (20). CH 711 489 B1 100 202 CH 711 489 B1 12b