Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
  • B25B7/18—Adjusting means for the operating arms
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B13/00—Hand shears; Scissors
  • B26B13/12—Hand shears; Scissors characterised by the shape of the handles
  • B26B13/14—Hand shears; Scissors characterised by the shape of the handles without gripping bows in the handle
  • B26B13/16—Hand shears; Scissors characterised by the shape of the handles without gripping bows in the handle spring loaded, e.g. with provision for locking the blades or the handles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact

Definitions

• the invention firstly relates to a hand tool with two tool halves crossing in a joint, in particular in the form of pliers, scissors or the like, wherein a tool half forms a jaw on one side of the joint and a handle on the other side of the joint, wherein a handle is further formed a spring element is assigned consisting of an elastically deformable rubber or plastic material having an opening which is penetrated by the handle and can be selectively brought by rotation from a non-operative position in at least one operative position, in which operative position the spring element in response to a spread the handles and generating corresponding restoring force comes into contact with the opposite handle.
• a generic hand tool in the form of a pair of pliers is known for example from German Utility Model 75 08 863.
• the opening of the spring element has a circular cross-section. Due to the circular opening, the individual positions of the spring element are not precisely defined. An unwanted displacement of the spring element may be the result.
• the spring element is made of an elastic material and is held solely by the resulting holding force of the elastic material on the handle of the pliers.
• the invention has for its object to further develop a hand tool described above advantageous use.
• a hand tool designed in this way is advantageous to the user in terms of handling, since the spring element is held in the respective position by a positive connection and at the same time reliably secured to the tool half by a handle cover, which is usually held captive on the corresponding section of the tool half can be. For example, by a hinge-side edge of the handle cover is used to fix the spring element on the mold half.
• the benefits associated with such a handle cover anyway (insulation, handle contour etc.) can also be used in combination with a spring element as described here. Due to the positive locking unwanted twisting of the spring element during use of the hand tool is usually no problem.
• the spring element can also be designed so that it can be arranged in a form-fitting manner in different operative positions relative to the opposite handle, which leads accordingly to different spring characteristics or different opening angles between the jaws with a relaxed spring.
• the positive connection can be given both between the spring element and the handle, as well as between the spring element and the handle cover. This also in the form of a catch.
• the non-circular cross-section is in particular a polygon, for example a cross-section oriented in a square. The corners can be rounded to suit the material. Notwithstanding this, the cross section may also be one which is oriented on a pentagon, hexagon, octagon or the like. It can also be an oval cross-section.
• the cross-section is preferably chosen so that the different action positions or disengagement are stably taken and held, but nevertheless one of manual adjustment is readily possible.
• the spring element is arranged on the hinge side of a support shoulder formed on the handle shell. Even when penetrated by the handle shell spring element this is prevented from sliding.
• the spring element is trapped between the support shoulder and the joint.
• the support shoulder is preferably adapted to the plan of the spring element in the non-action position. In the non-action position, the handle cover combined with the spring element thus corresponds to the usual handle cover, wherein the joint-side thickening, which prevents the hand from slipping in the direction of the hinge should, thickened is formed. In that regard, then the grips of the two tool halves are also designed differently.
• the handle cover which passes through the spring element, preferably forms hinge side of the spring element - suitably: also, that is, in addition to the support shoulder already described - a shoulder.
• the spring element can not, which could be disturbing, be pushed beyond the shoulder to the joint.
• a defined distance of the spring element to the joint can be maintained.
• the spring element - optionally secured by the shoulder - is suitably arranged at a distance from the outer contour of the joint.
• the distance may correspond to 1 to 4 times, preferably 1 to 2 times the thickness of the spring element in the axial direction of the tool half or the handle cover.
• the measure corresponds to the 1 V2 times the thickness of the spring element.
• the shoulder has a smaller floor plan than the support shoulder. This according to their function, primarily to ensure only the axial securing of the spring element. In addition, as an exposed loading surface of the spring element (wide side, joint side) can be achieved, which can also be used to actuate the spring element.
• the smaller plan of the shoulder is also advantageous in that the spring element for assembly - with elastic expansion - can be performed over the shoulder (and then possibly only the so combined handle cover can be pushed onto the mold half).
• the spring element is preferably geometrically designed in further detail so that due to the geometry results in a specific or over the circumference and individual working positions assigned different spring characteristic. It is thus preferable to provide at least one recess in the spring element.
• This recess - preferably formed as a passage recess - is located in the effective range of the spring element. Due to the design of the recesses in detail, the spring action of the spring element can be set as desired.
• the recess which preferably extends in the thickness direction of the spring element, can also transition into the already existing opening. It can be a large recess or it can also be formed many small recesses in the spring element. The recesses can enforce the spring element only partially.
• the spring element is preferably made of a rubber material or a thermoplastic elastomer. It offers a polyurethane or polypropylene elastomer (PPEPDM).
• PPEPDM polyurethane or polypropylene elastomer
• the Shore A hardness is preferably selected in the range of 50 to 80, more preferably 60 to 70.
• the spring element can also be made in combination of two or more materials, which then suitably have different hardnesses. For example, it is advantageous to form regions of the spring element, which are acted upon by hand for adjustment in the various operative positions, with a harder material, the actual spring areas in contrast, from a softer material. However, the stated combinations of materials can also be used to adjust the spring characteristic.
• recessed grips on the spring element may be provided to support the handling low. These can then consist in the sense of the above explanation of a harder material, if about the spring element is produced in total in two-component injection molding. Last but not least, a sparklingness can be set by the different materials.
• the opening dimension of the opening of the spring element in the effective direction of the spring element is greater than the thickness of the spring element in the axial extension of the mold half or the handle cover.
• the opening dimension preferably corresponds to 1.2 to 4 times the said thickness dimension of the spring element, more preferably 1.2 to 2 times and more preferably 1.5 times.
• the invention relates to a hand tool with two in a joint intersecting tool halves, in particular in the form of pliers, scissors or the like, wherein a tool half on one side of the joint forms a jaw and on the other side of the joint a handle which of a Grip sleeve is further surrounded, wherein further a Griffhülleninnenseite a spring element is assigned, which can be brought by displacement in the longitudinal direction of the handle shell, in the direction of the joint, from an Extrawirk ein in which the spring element is back-supported by the handle in at least one operative position in which operative position the spring element comes into contact with the opposing handle as a function of spreading of the handles and generation of corresponding restoring force.
• Such a hand tool in the form of a pair of pliers is known, for example, from DE 10 2004 024 385 A1.
• the spring element is formed of a metallic lamella, which is guided between the handle and the handle cover.
• the lamella has a predetermined curvature, which curvature in the non-operative position under elastic deformation, and thus constantly applied bias, is greatly reduced.
• the slat takes its predetermined curvature Increasing relaxation initially again, whereby a fingerkragendes end of the blade comes at a significant distance from the handle or the handle cover.
• this free end is moved to the handle, with appropriate elastic deformation and build up a restoring force.
• the object of the invention is to provide an advantageous hand tool with a spring element, which is to be brought into operative position or out of action position by displacement in the longitudinal direction of the tool half.
• the spring element consists of an elastically deformable rubber or plastic material.
• the spring element itself has an active portion and a carriage portion.
• the carriage section is preferably provided with laterally formed longitudinal grooves, in which guide rails of the handle cover engage.
• the carriage section preferably has a width that corresponds to more than half the width of the tool half or the handle in this area. Preferably about 4/10 to 9/10 of said width.
• the spring element further preferably forms a finger rest section in the region of the carriage section. This is the inward, the other half of the tool facing exposed back region of the carriage.
• a finger rest section in the region of the carriage section. This is the inward, the other half of the tool facing exposed back region of the carriage.
• this spring element also has one or more openings in the active section.
• the active section rising above the carriage section can be designed by means of the opening in such a way that a slipper-like design results.
• this opening may preferably be formed as a passage opening.
• the handle cover also results in the area of the spring element a complete enclosure of the handle.
• this spring element of several materials, possibly different hardnesses exist.
• it can also be produced by the two-component injection process.
• it is recommended, in particular, to manufacture the region of the sliding interaction with the handle cover made of a harder material, whereas the active section is made of a softer material.
• the finger rest portion forming free back of the carriage portion may be formed of a softer material, so as to allow a more favorable handling.
• Figure 1 shows a first embodiment of a hand tool in the form of a combination pliers, shown in front view with the spring element in the non-operative position, wherein the hand tool is in a closed position.
• Figure 2 is a section along the line II - II of Fig. 1.
• Fig. 3 is a section corresponding to Figure 2, but here is the spring element in the operative position.
• Fig. 4 is a view corresponding to FIG. 1, but here is the spring element in the operative position and is located on the opposite Handle shell, so that the hand tool is in an open position;
• Fig. 5 is a view corresponding to Figure 4, but here the hand tool has been closed against the restoring force of the spring element.
• FIG. 9 shows another embodiment of a hand tool in the form of a side cutter, the spring element being in the non-operating position and the hand tool being closed;
• Fig. 10 is a section along the line X - X of Fig. 9;
• Fig. 11 is a view corresponding to FIG. 9, but here the spring element has been shifted to the operative position, whereby the hand tool has taken an open position and
• Fig. 12 is a view corresponding to FIG. 11, but here the hand tool was closed against the restoring force of the spring element.
• a first exemplary embodiment of a hand tool 1 in the form of a combination pliers is shown and described with reference to FIGS. 1 to 5.
• the hand tool 1 is formed by two tool halves 2, 3, which are connected to each other by means of a joint 4.
• Each mold half 2, 3 each forms a jaw 5 and a handle 6.
• the two handles 6 are each received in a handle cover 7.
• the handle cover 7 forms a support shoulder 11 on the hinge side.
• On the hinge side of the support shoulder 11 is in one of the two handle Cases 7 a spring element 8 is arranged.
• the spring element 8 is made of an elastic rubber or plastic material.
• the spring element 8 forms an opening 9 with a cross-section which is oriented on a square cross-section.
• This opening 9 is penetrated by a section 10 of the handle cover 7, which has a cross-section adapted to the shape of the opening 9.
• the length of the portion 10 is the strength, that is the thickness, adapted to the spring element 8.
• the strength of the spring element 8 corresponds to 0.5 to 2 times, preferably about 1.5 times the thickness of the handle 6 in the region of the spring element eighth
• the spring element 8 further comprises a plurality of recesses 12 in an effective region 13, which are separated from one another by means of webs.
• the shoulder 14 has a smaller floor plan than the support shoulder 11. The floor plan of the shoulder 14 is dimensioned so that the spring element 8 can be mounted by elastic expansion of the opening 9 via the shoulder 14 on the section 10. Thus, the shoulder 14 engages over only a small surface area of the spring element 8 for securing the axial position.
• the different effective regions 13 'and 13 are created here by a different width (distance from the opening border to the outer edge) of the spring element 8.
• FIG. 6 shows a further exemplary embodiment of the spring element 8.
• the spring element 8 only has a large recess 15.
• the webs between the individual recesses 12 of the spring element 8 in Figure 2 are as it were removed.
• a large recess 15 has been created.
• FIG. 7 shows a further exemplary embodiment of a spring element 8. This embodiment has no recesses, however, recessed grips 16 are incorporated in the broad sides of the effective regions 13 '.
• the handle troughs 16 result in a certain positive engagement for a finger actuation of the spring element 6 in relation to pivoting.
• the recesses as previously explained may also be provided in the embodiments of FIGS. 7 and 8.
• the spring element 8 also consist of different materials or plastics. In particular, it may be produced by the two-component injection process.
• the effective regions 13 'with the grip troughs 16 are made of a harder material than the effective region 13, but the region immediately around the opening 9 is made of a softer material than the regions of the handle beads 16.
• FIGS. 9 to 12 a further exemplary embodiment of a hand tool 1 is described.
• the hand tool 1 in FIGS. 9 to 12 is a side cutter. Previously used reference numerals are also used here for the same elements.
• the spring element 8 is arranged on the handle inner side 17 of the handle cover 7.
• the spring element 8 has an elongated carriage section 18, which is guided in a longitudinal groove 19 of the handle cover 7.
• the spring element 8 is made of an elastic rubber or
• the carriage section 18 forms laterally extending grooves 20, in which protrude from the handle cover 7 formed guide rails 21.
• the guide rails 21 extend from the edge of the longitudinal groove 19 into the grooves 20 of the carriage section 18.
• the longitudinal groove 19 extends approximately from the half of the handle cover 7 until shortly before the end of the handle cover 7 in the direction of the joint 4.
• the spring element 8 can be moved in the direction of the joint 4.
• the longitudinal groove 19 is incorporated so far into the handle cover 7, that the handle 6 is completely enclosed in the region of the longitudinal groove 19 of the handle cover 7.
• the spring element 8 forms on the carriage section 18 a
• the active section 22 is penetrated by an opening 23.
• the axis of the opening 23 extends at an acute angle to the longitudinal extension of the longitudinal groove 19. In this case, the vertex of the acute angle in the direction of the joint 4.
• the finger rest section 24 is adapted to the width of the spring element 8.
• the spring element 8 is displaced in the direction of the joint 4 within the longitudinal groove 19 as far as the end, the spring element 8 is in the active position, which is shown in FIG. In this position, the active portion 22 is located on the opposite handle inner side 17 of the handle shell 7 at. As a result, the two handles 6 and the jaws 5 are spaced from each other.
• the hand tool 1 is kept in the open position.
• the elastic active portion 22 of the spring element 8 is elastically deformed. After no force is exerted on the two handles 6 of the hand tool 1, the restoring force, which starts from the elastic active portion 22 of the spring element 8, the hand tool 1 relocated again in the open position, which is shown in Figure 11.
• the opening angle ⁇ of the jaws 5 can also be changed here. This can be adjusted continuously by the position of the spring element 8 to the joint 4. The closer the spring element 8 is positioned to the joint 4, the larger the opening angle ⁇ becomes.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Scissors And Nippers (AREA)
• Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
• Table Equipment (AREA)
• Orthopedics, Nursing, And Contraception (AREA)
• Gloves (AREA)
• Professional, Industrial, Or Sporting Protective Garments (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=36710243

Family Applications (1)

Country Status (7)

Families Citing this family (10)

Family Cites Families (9)

• 2006
  • 2006-04-18 DE DE202006006159U patent/DE202006006159U1/de not_active Expired - Lifetime
  • 2006-10-25 DE DE102006050133A patent/DE102006050133A1/de not_active Withdrawn
• 2007
  • 2007-04-16 US US12/226,074 patent/US7975577B2/en not_active Expired - Fee Related
  • 2007-04-16 CN CN2007800228270A patent/CN101479076B/zh not_active Expired - Fee Related
  • 2007-04-16 DE DE502007003943T patent/DE502007003943D1/de active Active
  • 2007-04-16 WO PCT/EP2007/053668 patent/WO2007118868A1/fr not_active Ceased
  • 2007-04-16 EP EP07728133A patent/EP2007553B1/fr not_active Not-in-force
  • 2007-04-16 ES ES07728133T patent/ES2346804T3/es active Active
  • 2007-04-16 AT AT07728133T patent/ATE468943T1/de active

Non-Patent Citations (1)

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