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WO1995009070A1 - Outil commande a la main - Google Patents

Outil commande a la main Download PDF

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Publication number
WO1995009070A1
WO1995009070A1 PCT/EP1994/003236 EP9403236W WO9509070A1 WO 1995009070 A1 WO1995009070 A1 WO 1995009070A1 EP 9403236 W EP9403236 W EP 9403236W WO 9509070 A1 WO9509070 A1 WO 9509070A1
Authority
WO
WIPO (PCT)
Prior art keywords
struts
tool according
longitudinal
implement
strut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1994/003236
Other languages
German (de)
English (en)
Inventor
Rainer Eckert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Publication of WO1995009070A1 publication Critical patent/WO1995009070A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/16—Hand-held sawing devices with circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/005—Auxiliary devices used in connection with portable grinding machines, e.g. holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/0008—Means for carrying the chain saw, e.g. handles

Definitions

  • the invention relates to a hand-held implement with a front tool unit, a drive motor, a housing and with a handle device which consists of a front handle part and a rear handle part.
  • Hand-held tools with a front tool unit and a drive motor, a housing and a handle device have long been known in practice, in particular chain saws, cut-off machines or hedge trimmers.
  • the handle device which is used to handle such devices, usually consists of a front and a rear handle part in order to ensure two-handed operation.
  • the front handle part is usually used to guide and hold the device, which has to be brought into very different positions, e.g. Motor saws for severing branches on a felled tree according to the position of the tree, while the rear handle part usually also enables device functions to be controlled.
  • a corresponding working device is known from EP 0 267 472 B1, which comprises a front tool unit, a drive motor, a housing and a handle device which consists of a front handle part and a rear handle part.
  • the front handle part is designed as a bow handle, which can be continuously pivoted about a longitudinal axis of the implement during operation, so that the possible grip positions lie on a semicircle around the implement.
  • the bow handle here has an annular extension which engages around the housing and is received in a groove which extends around the housing.
  • the bow handle can be pivoted continuously under frictional resistance.
  • the rear handle part is designed in the form of a handle which is fastened rotatably about a longitudinal axis of the handle, which extends at an angle relative to the pivot axis of the bow handle, the angle being less than 90 °.
  • the pivotability of the front handle part and the rotatability of the rear handle part make it possible to guide the implement independently of the arm position of the operator in any position with respect to a longitudinal axis of the implement.
  • this known working device has the disadvantage that the alignment of the working device with respect to a workpiece at different heights and positions above the ground on the one hand unfavorable body positions and postures of the user, on the other hand often extreme deflections of the hand arm system, especially in the wrists, conditionally.
  • the distance between the front handle part and the rear handle part is not variable, so that the user is forced to bend down sharply when working at floor level, and when working at hip or chest height no optimal angular position of the elbow joints can be assumed.
  • SPARE BLADE (RULE 26) position and posture, avoiding extreme deflections and twists of the hand arm system and keeping and using the implement safely and risk-free.
  • the front grip part has a plurality of gripping points spaced in the longitudinal direction on an upper side of the implement.
  • This arrangement leads to the advantage that, on the one hand, the user does not have to bend down as much when working on the floor, and, on the other hand, when working at hip or chest height, the hands can be at a favorable distance from one another, as a result of which the elbow joints have a favorable angular position Power can be optimally transferred to the device.
  • secure access is possible since the front handle part is fixed relative to the implement, i.e. is not rotatably or displaceably mounted, so that increased safety is guaranteed when the implement is struck or jammed.
  • dynamic gripping allows continuous work, so that no breaks for adjusting the handle are necessary.
  • the front handle part expediently also has at least one gripping point on a left and / or right side of the implement. Since it is often necessary to tilt the implement by 90 ° to e.g. Performing horizontal cuts with a chainsaw, this gripping point, which in this case comes to lie above the center of gravity of the implement, enables the implement to be held and guided free of tilting moments around the front hand application point.
  • the front handle part on the upper side of the working device consists of cross struts which have the gripping points and at least one longitudinal strut, preferably two opposite longitudinal struts, between which the cross struts are arranged and to which these are attached. In this way, a simple and inexpensive design of the front handle part is ensured.
  • the front handle part has at least one front lateral strut, which has the gripping point, and at least one rear lateral strut.
  • front lateral struts on the left and right side of the implement, opposite one another are connected to the longitudinal struts and / or a cross strut on the top of the implement and are connected to a connecting strut on the underside of the implement and attached to the housing.
  • a rear lateral strut supports one of the two longitudinal struts on the housing, the front lateral struts forming a grid-like grip frame together with the rear lateral strut, the longitudinal and the cross struts.
  • the lateral struts on the left and right side of the implement make it possible, on the one hand, to process the working direction of the implement, e.g. to reverse with a horizontal saw with a chainsaw, on the other hand, the use for left and right-handers is equally ensured. Thanks to its many gripping points, the grid-like grip frame allows the user to grip easily and safely in order to continuously bring the implement into the required working position and to hold and guide it with little effort.
  • the longitudinal struts are concavely curved between at least two cross struts. So it is possible to place the two longitudinal struts with the concave curvature on the upper body or the abdomen and thereby support the implement with the body. This ensures a particularly safe and stable holding and guiding of the implement.
  • the cross struts are straight and are arranged at right angles to a longitudinal axis of the implement.
  • the cross struts can be manufactured economically, on the other hand, due to their symmetrical arrangement with respect to the longitudinal axis of the device, they can be gripped by right- and left-handers alike.
  • An arc-shaped design of the cross struts together with a symmetrical arrangement of these with respect to a longitudinal axis of the device is ergonomically particularly favorable.
  • cross struts are angled in a V-shape and are arranged symmetrically to a longitudinal axis of the device.
  • These transverse struts are preferably angled at an angle of approximately 75 ° to the longitudinal axis of the device, so that ulnar, i.e. outward deflections of the wrist, for both left-handed and right-handed operators, are largely avoided.
  • SPARE BLADE (RULE 26)
  • the cross struts are detachably connected to the longitudinal struts, preferably when a plurality of spaced fastening points are provided on the longitudinal struts for each of these cross struts.
  • the distances between the individual cross struts can be individually adapted to the operator, and on the other hand, the cross struts can be attached to both the left and right-handers in a suitable inclination to a longitudinal axis of the device.
  • cross struts are telescopically length-adjustable.
  • the volar ulnar i.e. To minimize downward and outward deflections of the wrist, it is also advantageous that the front lateral struts are arranged inclined to a longitudinal axis of the device.
  • the angle to the longitudinal axis of the device is preferably approximately 65 ° in order to enable ergonomically favorable access.
  • the front handle part is integrated in the housing.
  • the handle device is particularly light, which makes it possible to handle the implement with less effort.
  • ERS ⁇ ZBL ⁇ (RULE 26) along a top of the device or on one or both sides thereof are then formed by corresponding recesses in the housing itself.
  • the working device in connection with the rear handle part has an operating element for controlling device functions and at least one fixed handle section, the operating element rotating relative to the fixed handle section about a longitudinal axis thereof is stored in bar.
  • control element is mounted on a rotary sleeve and forms a rotatable handle section with this, the rotary sleeve preferably being adjacent to a front end of the fixed handle section and coaxial with the latter.
  • REPLACEMENT BLA ⁇ (RULE 26) is.
  • the control element can be easily handled by the index finger or thumb, the rotary control movement of the control element being converted into a translatory movement for controlling device functions by the above control cam.
  • a clutch device is arranged between the fixed handle section and the rotatable handle section, preferably formed from an axial clutch bearing and a stationary or rotatable friction disk, preferably with at least one pair of friction surfaces and / or one pair of teeth.
  • FIG. 1 is a side view of a working device according to a first embodiment of the invention in a schematic representation
  • FIG. 2 is a plan view of the implement according to FIG. 1 in a schematic representation
  • FIG. 3 is a front view of the implement according to FIG. 1 in a schematic representation
  • ERSA ⁇ ZBLA ⁇ T (RULE 26) 4 is an enlarged side view of a front grip part of the implement according to FIG. 1,
  • FIG. 5 is an enlarged front view of the front handle part of FIG. 4,
  • FIGS. 4 and 5 show an enlarged top view of the front handle part according to FIGS. 4 and 5
  • FIG. 7 is a perspective view of the implement with the operator in a side view, the implement being handled at a low height in a vertical position,
  • FIG. 8 is a perspective view similar to FIG. 7, the implement being guided at the waist of the operator,
  • FIGS. 7 and 8 are perspective views similar to FIGS. 7 and 8, the implement being held at the operator's chest height
  • FIGS. 7 to 9 are perspective views, similar to that in FIGS. 7 to 9, the implement being held in a horizontal position and supported in the abdominal region of the operator,
  • FIG. 11 shows a plan view of the implement according to a further exemplary embodiment of the front handle part with straight transverse struts which are inclined for left-handers, in a schematic representation
  • SPARE BLADE (RULE 26) 12 shows a plan view of the implement, similar to that in FIG. 11, with straight cross struts of the front handle part, which are inclined for right-handers,
  • FIG. 13 shows a plan view of the implement, similar to that in FIGS. 11 and 12, with a diagrammatic representation of the transverse struts of the front handle part,
  • FIG. 14 shows a plan view of the implement, similar to that in FIGS. 11 to 13, with a V-shaped angled cross struts of the front handle part in a schematic illustration,
  • FIG. 15 shows a plan view of the implement, similar to that in FIGS. 11 to 14, with only one longitudinal strut and V-shaped cross struts of the front handle part in a schematic representation
  • FIG. 16 shows a plan view of the implement, similar to that in FIGS. 11 to 15, with a detachably fastened, length-adjustable cross struts of the front handle part in a schematic illustration,
  • FIG. 17 shows a plan view of the implement, similar to that in FIGS. 11 to 16, with a releasably fastened, length-adjustable cross struts of the front handle part in an arrangement for left-handers in a schematic representation,
  • FIGS. 11 to 17 are plan views of the implement, similar to that in FIGS. 11 to 17, with detachably attached completed, length-adjustable cross struts of the front handle part in an arrangement for right-handers in a schematic representation,
  • FIG. 19 shows an enlarged sectional illustration of a length-adjustable cross strut of the front handle part according to FIG. 18 in a schematic illustration
  • FIG. 20 is an enlarged, perspective view of a rear handle part of the implement according to FIG. 1,
  • FIG. 21 shows an illustration, like FIG. 20, with an operator's hand encompassing the rear handle part, FIG.
  • FIG. 22 shows a longitudinal section through the rear handle part of the implement according to FIGS. 20 and 21 in an actuated state of an operating element in a schematic illustration
  • FIG. 23 shows an enlarged cross-sectional illustration of a rotatable handle section of the rear handle part with the operating element according to FIG. 22 in a schematic illustration.
  • FIG. 1 shows a schematic side view of a cut-off machine 1 with a front tool unit which rotatably supports the cut-off wheel 2, a housing 3 with a gasoline engine (not shown here) as the drive unit.
  • SPARE BLADE Source of the cut-off machine 1 and with a handle device 5, which consists of a front handle part 6 and a rear handle part 7.
  • the front handle part 6 serves primarily to hold and guide the cut-off machine 1, ie to support the weight of the cut-off machine 1 by an operator, while the rear handle part 7 besides its task of allowing reliable two-hand operation of the cut-off machine, also to control Mo.
  • ⁇ gate functions in particular the speed control, is used by operating devices explained in more detail below.
  • the front handle part 6 on the upper side of the cut-off machine 1 has a plurality of gripping points 8 which are spaced apart in the direction of the longitudinal axis of the cut-off machine 1 and which in the present case are realized by the cross struts 1.
  • front lateral struts 10 are provided, which are part of the front handle 6 and also form gripping points 8 and are preferably connected to the housing 3.
  • a rear lateral strut 9, which preferably does not form a gripping point, serves for the force-transmitting connection of the front handle part 6 to the housing 3.
  • FIG. 2 schematically shows the cut-off machine 1 from above in a top view, the position and arrangement of the cross struts 12 for forming upper gripping points 8 spaced in the longitudinal direction of the cut-off machine 1 being particularly clearly visible here.
  • the upper gripping points 8 are formed on the top of the cut-off machine 1 by the three transverse struts 12, which are connected to one another, preferably in one piece, by the oppositely arranged longitudinal struts 13, these longitudinal struts 13 optionally also for supporting the cut-off machine 1 on the body can serve the operator or can also be used for the handle of an operator.
  • the front lateral struts 10 extend downwards from the connection point of the front cross strut 12 and the opposite longitudinal struts 13 vertically to the longitudinal axis of the cut-off machine 1, as can be seen from FIG. 1.
  • SPARE BLADE (RULE 26) 3 shows a front view of the cut-off machine, the integral structure of the front lateral struts 10 with the front upper cross strut 12 being visible, the lateral struts 10 also along an underside of the housing 3 with one another, preferably while supporting the weight of the front tool unit of the Cut-off machine 1 and the housing 3 and the internals located therein are connected to one another by a connecting strut 14.
  • the rear lateral strut 9 which has no function as a gripping point, is connected on the right side of the grinder 1 to one of the longitudinal struts 13 on the top of the grinder 1 and is used to support the front grip part 6 on the housing 3.
  • Fig. 4 shows the front handle part 6 in an enlarged side view.
  • the longitudinal struts 13 are concavely curved between the rear and middle cross strut 12. This makes adaptation to the body easier when the grinder 1 is supported on the body of the operator.
  • the lateral strut 9 is fastened to one of the longitudinal struts 13 between the rear and middle cross struts and supports the longitudinal strut obliquely downwards and backwards on the housing 3.
  • the front lateral strut 10 is connected to the longitudinal struts 13 and the foremost of the cross struts 12 and, with the front lateral strut 10 on the opposite side of the cut-off machine 1, forms a closed one (FIG.
  • FIGS. 7 to 9 each show vertical sections and a vertical working position of the cut-off wheel 2
  • FIG. 10 illustrates a horizontal working position, in which the lateral struts 10 are attacked at a gripping point 8.
  • FIG. 11 and 12 show further advantageous embodiments for the front handle part 6 on the upper side of the cut-off machine 1.
  • the transverse struts 12 are in this case designed as straight, but inclined to the longitudinal axis of the cut-off machine 1 in a parallel arrangement to one another ⁇ det, the handle design shown in FIG. 11 with asymmetrically angled gripping points 8 is advantageous for reducing or avoiding ulnar abduction of the hand in left-handers.
  • FIG. 12 shows a preferred embodiment for the arrangement of the cross struts 12 with asymmetrically angled gripping points 8 for reducing or avoiding ulnar abduction in right-handers, analogously to the two above-described top views.
  • SPARE BLADE (RULE 26) 13 shows a further embodiment for the upper gripping points 8 of the front handle part 6, the cross struts 12 here being arcuate and arranged symmetrically to the longitudinal axis of the device between the two longitudinal struts 13 lying opposite one another.
  • Such a design of the front handle part on the upper side of the separating grinder 1 is equally well suited for avoiding ulnar abduction in right-handed and left-handed people.
  • each cross strut 12 here forming two symmetrically angled gripping points 8 and such a handle design also for avoiding or reducing ulnar abduction on the left. and right-handed is suitable.
  • the gripping points 8 are also designed as V-shaped angled cross struts 12, which are arranged symmetrically to the longitudinal axis of the device, whereby in contrast to the embodiment according to FIG.
  • the gripping points 8 are not between the two 15, the transverse struts 12 are angled to a longitudinal strut 13 which extends centrally in the longitudinal direction of the cut-off machine 1 and extend angled like a herringbone to both sides of the strut 13.
  • the transverse struts 12 between the opposite longitudinal struts 13 on the upper side of the front handle part 6 are in turn adjustable in length, the longitudinal struts 13 grouped together and each having a plurality of fastening points 25 arranged adjacent to one another, with which the opposite ends of a cross strut can be can be bound.
  • the cross struts 12 can also be mounted parallel to one another at different distances, and on the other hand, as shown in the exemplary embodiments according to FIGS. 17 and 18, they can be fixedly but interchangeably connected to the longitudinal struts 13 at different angles to the longitudinal axis of the device. With the individual grip elements formed in this way, individual adjustment of the respective gripping point 8 is possible to a large extent by the different positioning of the cross struts 12, both for right-handers and for left-handers.
  • FIG. 19 A longitudinal section through such a telescopic length-adjustable cross strut 12 is shown in FIG. 19. Between the fastening points at the opposite ends of the cross strut 12, the latter is formed from a sleeve-shaped part 12a, in which a return spring 4 is arranged, and an engagement part 12b, which has a length compensation section 12c.
  • the attachment of the cross struts 12 to the longitudinal struts 13 can in each case by screws or e.g. Plug bolts are made.
  • the rear handle part 7 of the handle device 5 is shown in a perspective view, the rear handle part 7 having an eccentric lever 15 as an operating element for controlling the speed of the cut-off machine 1, which lever is adjacent in connection with a rotating sleeve 17 as a rotatable handle section 18 to a fixed handle portion 16 forming the essential part of the rear handle part 7 (or a parallel axis to it) rotatably mounted at the front end of the fixed handle portion 16 or in a central region thereof.
  • SPARE BLADES (RULE 26) The operator can always be gripped and actuated in an optimal, ie rotated position relative to the fixed handle section depending on the working position, so that the right hand of the operator is also kept essentially free of dorsal extensions and overall a much more comfortable handling of the Cut-off machine 1 is possible.
  • a coupling device 19 By means of the coupling device 19, it is possible to give the rotary sleeve 17 a steadfastness in the respective angular position, so that the rotary sleeve 17 is not inadvertently rotated.
  • the clutch device 19 can consist of an axial clutch bearing 20 and a friction disk 21 in engagement with the end faces of the fixed handle portion 16 and the rotatable handle portion, i.e. of the rotating sleeve 17.
  • the eccentric lever 15 is shown in FIG.
  • the eccentric lever 15 can be pivoted about a pivot axis 23 running perpendicular to the turntable of the rotating sleeve 17 and has on its front side a control cam 24 for the longitudinal actuation of the hanger 23.
  • FIG. 23 shows an enlarged cross section through the rotary sleeve 17 in the region of its coupling connection to the
  • SPARE BLADE (RULE 26) fixed handle portion 16 shows.
  • a spiral spring 11 is accommodated, which rests with radial legs on the one hand on a fixed stop pin 26 connected to the fixed handle section 16 and with its other leg on a stop pin 27 rotatable with the rotary sleeve 17 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Harvester Elements (AREA)

Abstract

Un outil (1) commandé à la main comprend une unité antérieure d'outil (2), un moteur d'entraînement, un carter (3) et un dispositif formant poignée (5) constitué d'un élément antérieur (6) et d'un élément postérieur (7). L'invention se caractérise en ce que l'élément antérieur (6) de la poignée comprend plusieurs barres de préhension (8) mutuellement espacées dans le sens longitudinal sur une face supérieure de l'outil, ce qui évite l'abduction cubitale des mains gauche ou droite de l'utilisateur quelle que soit la position de travail de l'outil (1).
PCT/EP1994/003236 1993-09-28 1994-09-28 Outil commande a la main Ceased WO1995009070A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934332988 DE4332988A1 (de) 1993-09-28 1993-09-28 Handgeführtes Arbeitsgerät
DEP4332988.8 1993-09-28

Publications (1)

Publication Number Publication Date
WO1995009070A1 true WO1995009070A1 (fr) 1995-04-06

Family

ID=6498837

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/003236 Ceased WO1995009070A1 (fr) 1993-09-28 1994-09-28 Outil commande a la main

Country Status (2)

Country Link
DE (1) DE4332988A1 (fr)
WO (1) WO1995009070A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20105634U1 (de) * 2001-04-01 2001-06-28 Brehm, Bernhardt, 75365 Calw Multifunktionsgriff für Elektrowerkzeuge
DE102004048681A1 (de) * 2004-10-06 2006-04-13 Wacker Construction Equipment Ag Aufbruchhammer mit Mehrfachgreifsystem

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2219825A1 (fr) * 1973-03-02 1974-09-27 Alpina Spa
US4145810A (en) * 1977-09-02 1979-03-27 Betty Hardman Attachment for hedge trimmers
US4912848A (en) * 1989-01-09 1990-04-03 Textron, Inc. Power tool handle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7406974U (de) * 1973-03-02 1974-10-24 Alpina Spa Handmotorsäge
SE460270B (sv) * 1986-11-06 1989-09-25 Electrolux Ab Anordning vid motordrivna handredskap

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2219825A1 (fr) * 1973-03-02 1974-09-27 Alpina Spa
US4145810A (en) * 1977-09-02 1979-03-27 Betty Hardman Attachment for hedge trimmers
US4912848A (en) * 1989-01-09 1990-04-03 Textron, Inc. Power tool handle

Also Published As

Publication number Publication date
DE4332988A1 (de) 1995-03-30

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