EP3112099B1 - Knife - Google Patents

Description

The invention relates to a knife with a housing and a blade carrier, which is movable between a safety position and a cutting position. In the safety position, the blade held in the blade carrier is arranged in the housing. In the cutting position, the blade protrudes from an opening of the housing. The blade carrier is e.g. loaded by a spring in the safety position.

The housing comprises a stop with a stop surface. In the cutting position, the stop surface is in contact with a mating surface associated with the blade carrier. The stop surface is assigned to the housing directly or indirectly. The stop surface may e.g. be formed on an insert which is fixed to the housing. The abutment surface is arranged in the movement path of the counter stop surface. The contact of abutment surface and counter stop surface defines the cutting position of the blade carrier. In the cutting position, the blade is thus maximally moved out of the housing. It can e.g. other positions of the blade carrier against, in which the blade protrudes from the opening of the housing and in which can be cut.

From the DE 10 2005 057 213 such a knife is known. The stop is adjustable with this knife. In this way, different blade exit lengths can be adjusted. The adjustment of the stop by means of a screw which passes through a slot of the housing and can be screwed into the stop. The stop can be clamped in this way with the housing so that it is releasably secured in the set position on the housing.

From the DE 35 20 187 a knife according to the preamble of claim 1 is known in which different blade exit lengths can be adjusted via a rotary member mounted in the housing.

At many workstations, the same cutting process is repeatedly carried out, for which a certain blade exit length is suitable. In these cases, an adjustment of the knife is not desired. An adjustment could e.g. In these cases, endanger the employee or affect the cutting result, because the employee sets an unsuitable blade exit length.

Nevertheless, it is undesirable to stock many different knives for different workplaces whose blade exit length varies.

It was an object of the invention to provide a knife, which eliminates the above-mentioned disadvantages.

The invention is solved by a knife having the features of claim 1.

In the cutting position, the abutment surface associated with the housing is in contact with a mating surface associated with the blade carrier. For the purposes of the invention, "associated with the blade carrier" means that the opposing surface is e.g. directly to the blade carrier or e.g. may be associated with the blade carrier movement associated parts. Moving parts of the blade carrier may e.g. the drive train, comprising the handle and a motion transmission device between the handle and blade carrier and the blade be.

According to the invention, a module is releasably attached to the knife. The module is associated with a holding surface which forms the stop surface or the counter surface. The module may for example be associated with the housing or the blade carrier. Alternatively, the module can also be assigned to the actuation. The arrangement of the support surface on the module defines a first blade exit length. The module is against at least another module replaceable, which is selectable from a set of at least two modules. The arrangement of the holding surface on the other module defines a second blade exit length.

With the knife according to the invention, the same knife can be used for various applications in which different blade exit lengths are required. The parts provision can be reduced in this way. Moreover, it is possible according to the invention to set different blade outlet lengths in the knife, wherein the blade housing can be formed closed, so that the interior of the knife is not exposed to the risk of contamination.

The module is e.g. releasably attachable to the blade carrier or to the housing. The module may e.g. be attached directly or indirectly to the housing or the blade carrier. It can e.g. be attached to an insert, which is attachable to the housing.

The module is e.g. attachable in a mounting seat. In this way, it is ensured that each module from the set of modules has a defined position relative to the housing or to the blade carrier. The mounting seat is e.g. formed on the housing or on an associated with the housing insert part or on the blade carrier.

The module is provided with fastening means which are releasably engageable with counter-fastening means of the blade carrier or the housing. In this way, the module is, for example, non-positively and / or positively fastened to the housing or to an insert part assigned to the housing or to the blade carrier. The module can be fastened eg by means of a latching connection.

The holding surfaces of the different modules of the set of modules are e.g. offset from each other in the direction of movement of the blade carrier. The offset of the holding surface refers to e.g. on the fasteners. In this way, the path that the blade carrier travels between the safety position and the cutting position differs for the different modules.

The holding surface is e.g. formed by at least one projection. The projection extends e.g. transverse to the direction of movement of the blade carrier. The projection may be e.g. extend at right angles to the direction of movement of the blade carrier. It can e.g. two or more holding surfaces may be provided on the module. In this way the forces transmitted by each projection are less.

The housing is e.g. at least two stop surfaces and the blade carrier associated with at least two mating surfaces.

The counterface is e.g. arranged on at least one extension of the blade carrier. For example, the blade carrier forms an arm on which the counter-stop is arranged. The extension may e.g. extend in the direction of movement of the blade carrier to the rear.

The stop surface of the housing is e.g. arranged in the movement path of the opposite surface of the blade carrier. As the blade carrier moves toward the cutting position, it is stopped by contact from the mating surface with the abutment surface, thereby defining the cutting position.

• Fig. 1 eine Seitenansicht des Messers in der Sicherheitsposition,
• Fig. 2 eine Seitenansicht des Messers in der Schneidposition,
• Fig. 2a eine Seitenansicht gemäß Ansichtspfeil IIa in Fig. 6,
• Fig. 3 eine perspektivische Darstellung der Baugruppe aus Einsatzteil, Modul, Klingenträger und Klinge in der Sicherheitsposition,
• Fig. 4 in Anlehnung an Fig. 3 eine perspektivische Darstellung der Baugruppe, wobei das Einsatzteil nicht dargestellt ist,
• Fig. 5 in Anlehnung an Fig. 4 die Baugruppe in der Schneidposition,
• Fig. 6 eine Frontdarstellung des Messers gemäß Ansichtspfeil VI in Fig. 1,
• Fig. 7 eine Schnittdarstellung des Messers gemäß Schnittlinie VII - VII in Fig. 6,
• Fig. 8 eine Frontdarstellung des Messers gemäß Ansichtspfeil VIII in Fig. 2,
• Fig. 9 eine Schnittdarstellung des Messers gemäß Schnittlinie IX - IX in Fig. 8,
• Fig. 10 in Anlehnung an Fig. 2 eine Seitenansicht des Messers in der Schneidposition, wobei ein anderes Modul an dem Messer montiert ist,
• Fig. 11 eine Frontansicht des Messers gemäß Ansichtspfeil XI in Fig 10, und
• Fig. 12 in Anlehnung an Fig. 7 eine Schnittdarstellung des Messers in der Sicherheitsposition, wobei ein anderes Modul an dem Einsatzteil montiert ist,
• Fig. 13 eine Schnittdarstellung des Messers gemäß Schnittlinie XIII - XIII in Fig. 11.

Further advantages will become apparent from an embodiment shown schematically in FIGS. Show it:

• Fig. 1 a side view of the knife in the safety position,
• Fig. 2 a side view of the knife in the cutting position,
• Fig. 2a a side view according to the arrow IIa in Fig. 6 .
• Fig. 3 a perspective view of the assembly of insert, module, blade carrier and blade in the safety position,
• Fig. 4 based on Fig. 3 a perspective view of the assembly, wherein the insert part is not shown,
• Fig. 5 based on Fig. 4 the assembly in the cutting position,
• Fig. 6 a front view of the knife according to view arrow VI in Fig. 1 .
• Fig. 7 a sectional view of the knife according to section line VII - VII in Fig. 6 .
• Fig. 8 a front view of the knife according to arrow VIII in Fig. 2 .
• Fig. 9 a sectional view of the knife according to section line IX - IX in Fig. 8 .
• Fig. 10 based on Fig. 2 a side view of the knife in the cutting position, with another module is mounted on the knife,
• Fig. 11 a front view of the knife according to view arrow XI in FIG. 10 , and
• Fig. 12 based on Fig. 7 a sectional view of the knife in the safety position, wherein another module is mounted on the insert part,
• Fig. 13 a sectional view of the knife according to section line XIII - XIII in Fig. 11 ,

The knife as a whole is denoted by the reference numeral 10 in the figures. Like reference numerals in the different figures indicate corresponding parts.

The knife 10 comprises according to Fig. 1 a housing 11 and an insert part 12. The insert part 12 is associated with a blade carrier 13.

The housing 11 serves as a handle, which can be held by the user's hand. The housing 11 includes a rear end portion 21 and a front end portion 26. The rear end portion 21 includes a rear opening 39 and the front end portion 26 includes a front opening 18. In addition, the housing 11 forms two opposing side surfaces 28 and 29. The side surface 28 is provided with a slot-like opening 19 and the side surface 29 is provided with a slot-like opening 20. Through the openings 19 and 20 of the blade carrier 13 can be actuated.

The blade carrier 13 has opposite side surfaces 30 and 31, which are each provided with an actuating surface 15. In the present embodiment, each actuating surface 15 is provided with a structure 16 which prevents slipping of the actuating finger. On the actuating surface 15, the blade carrier 13 from the in Fig. 1 shown safety position in the direction x1 in the in Fig. 2 shown cutting position are displaced in which a fixed to the blade carrier 13 blade 17 through the opening 18 of the Housing 11 exits. From the cutting position of the blade carrier 13 is automatically moved back by a spring, not shown, in the direction x2 in the safety position as soon as the actuating surface 15 is relieved by the user.

As a safety position, the position is referred to below, in which the blade carrier 13 has been moved back a maximum and the blade 17 is disposed within the housing 11. In addition, there are other positions of the blade carrier 13, in which the blade 17 is disposed within the housing 11. A spring, not shown, loads the blade carrier 13 in the maximum retracted safety position. The cutting position is the position in which the blade carrier 13 is maximally advanced and the blade 17 emerges from the opening 18 of the housing 11. In addition, there are other positions of the blade carrier 13, in which the blade 17 exits the opening 18.

Through the opening 39 at the rear end of the housing 21, a portion of the insert part 12 and the blade carrier 13 are inserted into the housing 11. The insert 12 is according to the Fig. 1, 2 and 2a mounted in a mounting seat of the housing 11 and fixed to the housing 11. Detent means are provided on the insert member 12 and the housing 11, wherein the latching means of the insert member 12 and the housing 11 can be releasably engaged to secure the insert member 12 to the housing 11. When the insert 12 is mounted in its mounting seat on the housing 11, it has a defined position relative to the housing 11.

The insert 12 can be released from the housing 11, for example, to perform a blade change or to exchange a module 14, which will be explained in more detail below. If the insert 12 is released from the housing 11, the entire in Fig. 3 illustrated Assembly comprising the insert part 12, the blade carrier 13 and the module 14 are removed from the housing 11.

The module 14 is part of a set of at least two different modules. With the module 14, the blade exit length can be adjusted. The blade exit length is the length at which the blade 17 projects beyond a front housing surface 27.

The module 14 is held in a form-fitting manner in a mounting seat of the insert part 12 and can be released from the insert part 12. For positive attachment to the housing 11, the module 14 at a rear end portion 37 a plurality of projections 35 (see, for example, the Fig. 7 and 9 ), which can be brought into engagement with recesses 36 of the insert 12. At a front end portion 38, the module 14 is provided in a manner not shown with fastening means which can be releasably engaged with counter-fastening means of the insert part 12. After mounting in the mounting seat, each module of the set of different modules has a defined position relative to the insert 12.

The module 14 comprises stops 22a and 22b, which in the present embodiment are formed by two projections which project in the direction y1 and y2 with respect to the outer contour. The stopper 22a forms a stopper surface 32a, and the stopper 22b forms a stopper surface 32b.

The blade carrier 13 is provided with arms 33a and 33b which form an extension 24 which extend from a front portion 34 of the blade carrier 13 rearwardly in the direction x2. The arm 33a is provided with a mating surface 23a and the arm 33b is provided with a mating surface 23b. The stop surfaces 32a and 32b and the counter surfaces 23a and 23b are arranged symmetrically to a longitudinal center axis m, for example. In the safety position, the mating surfaces 23 a and 23 b are arranged in a defined position relative to the insert part 12 and to the housing 11. In the safety position according to Fig. 7 the counter surface 23a and the abutment surface 32a and the counter surface 23b and the abutment surface 32b are spaced from each other by a length l1. The length l1 is the path that the blade carrier 13 can move maximally in the direction x1 until further movement in the direction x1 is prevented by the contact between mating surfaces 23a / 23b and abutment surfaces 32a / 32b.

The abutment surface 32a is located in the path of movement of the mating surface 23a, and the abutment surface 32b is in the path of movement of the mating surface 23b when the blade carrier 13 is moved in the direction x1. The cutting position is defined by the mating surfaces 23a and 23b on the abutment surfaces 32a and 32b in FIG Fig. 9 stay in contact.

The knife 10 is in accordance with Fig. 10 to 13 provided with a second module 25. Fig. 12 shows the safety position and Fig. 13 the cutting position of the knife. It can be seen that in the case of the second module 25, the stop 22 is arranged offset further in the direction x1 with respect to the first module 14. In the safety position according to Fig. 12 the counter surface 23a and the abutment surface 32a and the counter surface 23b and the abutment surface 32b are spaced from each other by a length l2 which is greater than l1. This means that the blade carrier 13 in the second module 25 is further movable in the direction x1 compared to the first module 14 until the counter-abutment 23a / 23b of the blade carrier 13 comes into contact with the stopper 22a / 22b. The blade exit length is therefore larger.

Claims (9)

1. Knife with a housing (11) and with a blade holder (13) for holding a blade (17), the blade holder (13) being movable between a safety position in which the blade (17) is disposed inside the housing (11) so as to be inaccessible and a cutting position in which the blade (17) extends at least partially out of the housing (11), the cutting position being defined by the interaction of at least one stop surface (32a, 32b) associated with the housing (11) and at least one counterpart surface (23a, 23b) associated with the blade holder (13), characterised in that one module (14) out of a set of at least two modules (14, 25) is releasably secured to the knife, the module is provided with a retaining surface which forms the stop surface (32a, 32b) or the counterpart surface, and the position of the retaining surface on the module defines a first blade extension length and the module (14) is interchangeable with at least one other module (25) of the set of modules (14, 25), the position of the retaining surface on the other module (25) defining a second blade extension length which is different from the first blade extension length.
2. Knife as claimed in claim 1, characterised in that the module (14, 25) can be releasably secured to the blade holder (13) or to the housing (11).
3. Knife as claimed in claim 1 or 2, characterised in that the module (14, 25) can be secured in a mounting seat.
4. Knife as claimed in one of the preceding claims, characterised in that the module (14, 25) has fastening means (35) which can be releasably moved into engagement with counterpart fastening means (36) of the blade holder (13) or of the housing (11).
5. Knife as claimed in one of the preceding claims, characterised in that the retaining surfaces of the different modules (14, 25) of the set of modules are offset from one another in a direction of movement (x1, x2) of the blade holder (13).
6. Knife as claimed in one of the preceding claims, characterised in that the retaining surface is formed by at least one projection of the module (14, 25).
7. Knife as claimed in claim 6, characterised in that the projection extends transversely to a direction of movement (x1, x2) of the blade holder (13).
8. Knife as claimed in one of the preceding claims, characterised in that the stop surface (32a, 32b) is disposed in the movement path of the counterpart surface (23a, 23b).
9. Knife as claimed in one of the preceding claims, characterised in that the counterpart surface (23a, 23b) is disposed on a rear extension (24) of the blade holder (13).

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