EP0274710B1 - Pince motorisée portable pour le serrage de cavaliers ou similaires - Google Patents

Pince motorisée portable pour le serrage de cavaliers ou similaires Download PDF

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Publication number
EP0274710B1
EP0274710B1 EP87118827A EP87118827A EP0274710B1 EP 0274710 B1 EP0274710 B1 EP 0274710B1 EP 87118827 A EP87118827 A EP 87118827A EP 87118827 A EP87118827 A EP 87118827A EP 0274710 B1 EP0274710 B1 EP 0274710B1
Authority
EP
European Patent Office
Prior art keywords
jaws
pliers
plate
pliers according
cramps
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.)
Expired - Lifetime
Application number
EP87118827A
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German (de)
English (en)
Other versions
EP0274710A1 (fr
Inventor
Raffaele Agostini
Lorenzo Prioli
Armando Gurini
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT87118827T priority Critical patent/ATE63492T1/de
Publication of EP0274710A1 publication Critical patent/EP0274710A1/fr
Application granted granted Critical
Publication of EP0274710B1 publication Critical patent/EP0274710B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/146—Clip clamping hand tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/53783—Clip applier

Definitions

  • the invention relates to portable pliers with motor drive for irreversible jamming of C-shaped cramps or the like, in particular for connecting elongated elements, for example edges of wire mesh plates, such as are used for protective structures against landslides and erosions, or of metal wire cages on construction sites .
  • Portable pliers with motor drive for the purposes mentioned are already known, which have a pair of mirror-symmetrically arranged clamping jaws, which are mounted on a support member and, at their free ends, which protrude outwards and are spread out in the rest position, seat grooves for the curved ends of the Have C-shaped cramps. These are inserted into the seat through a thrust plate acting on the back of the staple, which runs parallel to the clamping jaws and is moved in the longitudinal direction via a rod.
  • the pliers also have a stop which prevents the back of the cramp inserted into the seat grooves from retracting when the free ends of the jaws approach each other to clamp the cramps.
  • the thrust plate lies in the plane in which the clamping jaws are located, the rod connected to these being the piston rod of a pneumatic working unit.
  • the insertion process of the staples into the seat grooves, which are incorporated into the free end sections of the jaws are finished as soon as the thrust plate has reached its end position in the direction of the seat grooves; the cramp is then compressed in its clamped position as the pusher plate retracts to its opposite position.
  • the stop which prevents the back of the staple from retreating when jamming, consists of a snap-in pawl which engages behind the central part of the back of the staple under spring action.
  • a pair of pliers with the features of the preamble of claim 1 is known from US-A 3 066 304. These pliers have a drive in the form of a single electric motor, which both swivels the jaws and displaces the thrust plate via a spur gear as well as downstream worm gears and toggle joint mechanisms.
  • a slide is moved in the direction of the two clamping jaws via the gears mentioned, as a result of which the clamping jaws are closed by means of two coupling rods.
  • a pinion mounted on the slide rolls on a toothed rack, as a result of which, due to the simultaneous engagement in a toothing of the push plate, it is pushed forward.
  • US-A 3 287 955 shows and describes a similar pair of pliers with only a single motor drive, which, however, is here a pneumatically acting work unit.
  • Pneumatically operated pliers can only generate relatively small forces, as the available pressures are below 10 bar lie. With such pressures, however, with reasonable construction costs for the pliers, no forces can be generated which are suitable for jamming staples of relatively stiff design.
  • the invention has for its object to provide a portable pliers of the type specified in claim 1, which can also jam relatively stiff cramps effectively and safely with little weight and small size, without this deforming in an undesirable manner.
  • the pliers should be so reliable and robust that they meet the requirements of longer and continuous use even under difficult conditions, for example on a construction site or in the field, and can also be used by less powerful operators.
  • the solution provided according to the invention has the essential advantage that instead of a single drive for the two organs of the pliers - clamping jaws and thrust plate - two mutually independent drives in the form of hydraulic units are provided.
  • a simply constructed pliers consisting of relatively few individual parts is available, which can be manufactured economically with a low weight and which is extremely robust, reliable and not susceptible to wear in use.
  • This advantage is particularly important when the pliers are used on construction sites and in the field where there are no repair workshops.
  • the work sequences for the two organs mentioned can be controlled independently of one another and according to requirements. While the hydraulic work unit for closing the jaws can be designed so strong that even strong staples can be processed, the other work unit for moving the push plate can be relatively small, since the force for feeding the staples is only very small. In this way, the overall size of the entire pliers is small.
  • the portable pliers shown in FIGS. 1 to 11 have a housing 1 with a rear handle 2 and a side handle 3.
  • the housing 1 is fastened to a supporting structure of the pliers, which has a support plate 4 extending in the longitudinal direction.
  • clamping jaws 6, 7 which are mirror-symmetrically identical to one another and which are arranged symmetrically to a longitudinal center plane 8 of the pliers (cf. FIGS. 3 and 7); the longitudinal median plane 8 extends at right angles to the support plate 4.
  • the clamping jaws 6 and 7 are mounted on pivots 9 and 10, respectively, which protrude from the upper side 5 of the support plate 4 and have free end sections which extend beyond the front edge 11 of the support plate 4.
  • Coupling rods 12 and 13 are articulated to the ends of the clamping jaws 6 and 7 opposite these end sections, which are in turn mounted on a slide 15 via a pin 14 which runs parallel to the pivot pins 9 and 10.
  • the slider 15 can be moved in the longitudinal direction of the support plate 4 and is guided in its displacement movements by engaging with a lower shoulder 16 in a longitudinal groove 17 which is incorporated into the top 5 of the support plate 4.
  • a rod is connected, which is the piston rod 18 of a piston 19 of a double-acting hydraulic working unit 20.
  • the cylinder 21 of this working unit 20 is attached to a cylindrical support block 22 which extends at right angles to the support plate 4 and is attached to the rear edge thereof, which faces away from the front edge 11.
  • the support block 22 thus forms part of the load-bearing structure of the pliers and serves as a support element for the rear part of the housing 1 with the handle 2.
  • the piston 19 divides the interior of the cylinder 21 into two chambers 23 and 24, which are connected via lines 25 and 26 and via a distributor switch 29, the function of which is explained in more detail below, with a pressure source 27 (cf. FIG. 11) or with a drain 28 can be connected.
  • the free ends of the jaws 6 and 7, which protrude beyond the front edge 11 of the support plate 4, are designed as ends 30 which protrude from the underside 31 of the support plate 4, which is opposite to its upper side 5, on which the jaws 6 and 7 lie .
  • grooves 32 are incorporated, the sections of which lie in the region of the free ends of the clamping jaws 6, 7 are curved in the direction of the longitudinal center plane 8.
  • grooves 32 serve to receive and seat the opposite, curved ends 33 of C-shaped cramps 34 (see FIGS. 4 and 6) which are to be irreversibly clamped with the aid of the pliers, whereby they differ from those in FIGS 6 shown in the form shown in Figure 7 are converted.
  • Each groove 32 merges into a guide groove 35 with a C-shaped cross section, which is shown in FIG.
  • the two mutually opposite guide grooves 35 are incorporated in two longitudinal ribs 36 which protrude from the mutually opposite edges of the underside 31 of the support plate 4. Due to this arrangement, the grooves 32, which are incorporated into the ends 30 of the jaws 6, 7, form extensions of the C-shaped guide grooves 35 when the jaws 6, 7 are in their spread rest position.
  • a thrust plate 37 The longitudinal edges of a thrust plate 37 are slidably mounted in the two guide grooves 35, the groove base surfaces of which have a distance from one another which essentially corresponds to the height of the cramps 34.
  • the thrust plate 37 has at its end facing the ends 30 of the clamping jaws 6, 7 a concave end face 38, the curvature of which corresponds approximately to the curvature of the back 39 of the cramps 34.
  • the push plate 37 is connected to a piston rod 40 of a piston 41, which is slidably mounted in a cylinder 42 of a double-acting hydraulic auxiliary work unit 43, which is also fastened to the support block 22, namely under the cylinder 21 of the work unit 20.
  • the piston 41 divides the interior of the cylinder 42 into two chambers 44 and 45, which can be connected to a line 46 or 47 via a distributor switch 48.
  • the distributor switch 48 can close off the two chambers 44 and 45 to the outside or connect it to the pressure source 27 for the pressure fluid or to the drain 28, similarly to the way the distributor switch 29 controls the two chambers 23 and 24 of the cylinder 21.
  • Both distribution switches 29 and 48 are controlled by a logic circuit 49 (see FIG. 11). This is actuated when the switch 50 is closed, which can be actuated via a switch button 51 in the rear handle 2, provided that the pressure in the liquid coming from the pressure source 27 (preferably an electric pump) has reached the normal operating pressure for the pliers and a pressure not shown Pressure switch releases the operation of the logic circuit 49.
  • the logic circuit 49 is started. This first actuates the distributor switch 29 so that the chamber 23 of the working unit 20 is connected to the pump 27, so that the piston 19 is advanced in the direction of arrow 52. The piston 41 stops because the logic circuit 49 simultaneously adjusts the distribution switch 48 so that both chambers 44 and 45 of the auxiliary work unit 43 have no connection to the outside.
  • the logic circuit 49 is set so that the switch 50 is now opened by releasing the pressure on the switch button 51.
  • the distributor switch 29 is simultaneously controlled so that the piston 19 is retracted, the free ends of the clamping jaws 6 and 7 being spread into the open position.
  • the auxiliary work unit 43 also pulls back the push plate 37 by actuating the distribution switch 48 by means of the logic circuit 49, the chamber 45 of the auxiliary work unit 43 being connected to the pump 27 and the other chamber 44 to the drain 28 will.
  • the concave end face 38 of the pusher plate 37 is located immediately behind the junction point of a feed magazine 53 into the space between the two groove bases of the mutually opposite guide grooves 35, which are incorporated into the longitudinal ribs 36 of the support plate 4.
  • a subsequent cramp can move up from the feed magazine 53 and lie with its back 39 in such a position that it rests on the concave end face 38 of the thrust plate 37 (see FIG. 6).
  • the pliers described and designed according to the invention allow irreversible jamming even of very strong cramps and, thanks to the use of hydraulic working units which can exert very high pressure forces, are relatively light in weight and have a small installation space.
  • it fulfills the basic requirements for portable tools and is very reliable due to the simple construction of the retaining means, which prevent the back of the staples from shrinking and irregular deformation of the staples during jamming.
  • Figures 13 to 16 show a modified embodiment of the pliers.
  • the guide grooves 35 which are incorporated in the lower longitudinal ribs 36 of the support plate 4, are arranged such that the underside 31 of the support plate 4 and with it also the thrust plate 37 to the top 5 of the support plate 4, on which the jaws 6 and 7 lie, run inclined.
  • the inclination is chosen so that the cramp 34 inserted into the grooves 32 of the clamping jaws 6 and 7 sits in the two grooves 32 at the end of the feed movement of the push plate 37, as shown in FIG. 14; this means that the height of the two grooves 32 is greater than the diameter of the cramp wire.
  • an exact clamping of the staple 34 is facilitated, which takes on the shape shown in FIG. 16 at the end of the closing movement of the ends 30 of the two clamping jaws 6 and 7.
  • the clamp 34 is prevented from moving downward during the jamming, since a plate 69 is fastened on both sides of the front end section of the underside 31 of the support plate 4 (cf. FIG. 13). This measure can also be taken in the embodiment shown in FIGS. 1 to 11.
  • the logic circuit 49 that controls the operations of the gun is not controlled by the pulses supplied to the logic circuit 49 by a pressure switch, but by pulses due to the closing and opening of micro Limit switches 63, 64 and 65, 66, which are associated with the rods 18 and 40 of the pistons 19 and 41 and are actuated by lugs 67 and 68, respectively, which are fastened on these rods.
  • This variant improves the economy when operating the pliers, increases their functional accuracy and improves safety for the operator.
  • the electric pump 27, the distribution switches 29 and 48 and the components of the electrical circuit which controls the function of the working units 20 and 43 and contains the logic circuit 49 can be accommodated in a compact unit which can be accommodated in a bag or a backpack that the operator can easily carry.
  • connection to an external energy source consists of a cable which has to be connected to a mains socket, which has an extremely favorable influence on the mobility and the ease of use.
  • the jaws 6 and 7 can be designed so that they are mounted on a single pivot which protrudes from the top 5 of the support plate 4 and which takes the place of the two pivot 9 and 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Clamps And Clips (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Supports Or Holders For Household Use (AREA)
  • Sheet Holders (AREA)
  • Wire Bonding (AREA)
  • Basic Packing Technique (AREA)
  • Earth Drilling (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Surgical Instruments (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Claims (11)

  1. Pince portable à mécanisme d'entraînement motorisé pour serrer des cavaliers en forme de C ou analogues, comportant une paire de mors de serrage (6, 7) qui sont disposés symétriquement par rapport à un plan, qui, dans leur zone médiane,sont montés, avec liberté de pivotement, sur un organe porteur (4), et qui, à leurs extrémités libres, débordant vers l'extérieur, présentent des évidements d'assise (32) pour les extrémités libres, situées en face l'une de l'autre, des cavaliers, comportant également une plaque coulissante (37) qui peut coulisser en va-et-vient selon la direction longitudinale, qui insére les cavaliers dans les évidements d'assise et dont la face frontale forme, lors du serrage, une butée pour l'appui des cavaliers, étant précisé que les mors de serrage sont disposés dans un plan qui est situé parallèlement au plan de coulissement de la plaque coulissante et que les évidements d'assise sont usinés dans les parties d'une extrémité libre des mors de serrage qui s'étendent en direction du plan de coulissement, caractérisée par le fait que pour le mécanisme de pivotement des mors de serrage (6, 7) d'une part et pour le mécanisme de coulissement de la plaque coulissante (37) d'autre part sont respectivement prévus un vérin hydraulique propre (20 ou 43) à piston à double effet (19 ou 41).
  2. Pince selon la revendication 1, caractérisée par le fait que les mors de serrage (6, 7) sont reliés, par l'intermédiaire de biellettes (12, 13), à un coulisseau (15) qui est fixé à la tige de piston (18) du vérin correspondant (20).
  3. Pince selon la revendication 1 ou 2, caractérisée par le fait que la plaque coulissante (37) est fixée à la tige de piston (40) du vérin correspondant (43).
  4. Pince selon l'une des revendications 1 à 3, caractérisée par le fait que la face frontale (38) de la plaque coulissante (37) présente, au moins dans sa zone médiane, un profil concave adapté à la courbure du dos des cavaliers (34).
  5. Pince selon l'une des revendications précédentes, caractérisée par le fait que les vérins (20, 43) sont fixés sur un bloc porteur (22) à partir duquel vient perpendiculairement en saillie une plaque porteuse (4) sur laquelle sont montés les mors de serrage (6, 7).
  6. Pince selon la revendication 5, caractérisée par le fait que la plaque porteuse (4) présente, sur ses bords longitudinaux, des nervures longitudinales (36) qui débordent vers le bas et dans lesquels sont usinés des guidages (35) en forme de rainure pour la plaque coulissante (37), étant précisé que les deux guidages (35) se trouvent au niveau des évidements d'assise (32) usinés dans les mors de serrage (67) et se poursuivent en ces évidements.
  7. Pince selon la revendication 6, caractérisée par le fait que les rainures de guidage (35) sont conçues de façon que la face inférieure (31) de la plaque porteuse (4), et avec elle la plaque coulissante (37), soient disposées obliquement par rapport à la face supérieure (5) de la plaque porteuse (4) sur laquelle portent les mors de serrage (6, 7).
  8. Pince selon l'une des revendications précédentes, caractérisée par le fait qu'au moins une partie des organes de commande pour le fonctionnement des vérins (20, 43) sont regroupés en un ensemble compact.
  9. Pince selon la revendication 8, caractérisée par le fait que l'ensemble est logé dans une sacoche, un sac à dos ou analogue, qui peut être porté par l'opérateur de la pince.
  10. Pince selon l'une des revendications 1 à 7, caractérisée par le fait que tous les organes de commande pour le fonctionnement des vérins (20, 43) sont fixés sur la structure porteuse de la pince.
  11. Pince selon l'une des revendications précédentes, caractérisée par le fait que les courses de coulissement des tiges de piston (18, 40) sont limitées par des micro-interrupteurs (63, 64, 65, 66) qui peuvent être manoeuvrés par des talons (67, 68) ou analogues, fixés sur les tiges de piston (18, 40).
EP87118827A 1986-12-18 1987-12-18 Pince motorisée portable pour le serrage de cavaliers ou similaires Expired - Lifetime EP0274710B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87118827T ATE63492T1 (de) 1986-12-18 1987-12-18 Tragbare zange mit motorantrieb zum verklemmen von krampen o. dgl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8603615A IT1208136B (it) 1986-12-18 1986-12-18 Pinza portatile motorizzata per il serraggio irreversibile di graffe a "c" o simili
IT361586 1986-12-18

Publications (2)

Publication Number Publication Date
EP0274710A1 EP0274710A1 (fr) 1988-07-20
EP0274710B1 true EP0274710B1 (fr) 1991-05-15

Family

ID=11110677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87118827A Expired - Lifetime EP0274710B1 (fr) 1986-12-18 1987-12-18 Pince motorisée portable pour le serrage de cavaliers ou similaires

Country Status (12)

Country Link
US (1) US4890474A (fr)
EP (1) EP0274710B1 (fr)
AT (1) ATE63492T1 (fr)
AU (1) AU611124B2 (fr)
BR (1) BR8707591A (fr)
CA (1) CA1296167C (fr)
DE (1) DE3770143D1 (fr)
ES (1) ES2023881B3 (fr)
GR (1) GR3002471T3 (fr)
IT (1) IT1208136B (fr)
MX (1) MX168952B (fr)
WO (1) WO1988004597A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018103280B4 (de) 2017-03-01 2022-03-31 Adient Engineering and IP GmbH Befestigungswerkzeug

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US5881452A (en) * 1997-09-10 1999-03-16 Nowell, Iii; Stephen C. Apparatus for applying deformable metal fastener clips to concrete reinforcement steel and the like
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US6067707A (en) * 1997-10-16 2000-05-30 Stanley Fastening Systems, L.P. Ring applying and clinching device
JP2931299B1 (ja) * 1998-07-21 1999-08-09 明邦株式会社 ホッグリング締結装置
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US7356914B2 (en) * 2003-11-04 2008-04-15 Ideal Industries, Inc. Twist-on wire connector applicator
US7464578B2 (en) * 2005-06-03 2008-12-16 Fci Americas Technology, Inc. Hand-held, portable, battery-powered hydraulic tool
US9089959B2 (en) 2013-07-18 2015-07-28 Techway Industrial Co., Ltd. Cordless clinching tool
FR3009508B1 (fr) * 2013-08-12 2015-08-28 Techway Ind Co Ltd Outil a river sans fil
US10226826B2 (en) 2013-10-22 2019-03-12 Milwaukee Electric Tool Corporation Hydraulic power tool
CN103722532B (zh) * 2013-11-13 2017-01-04 广东美特机械有限公司 一种c型钉枪钉圈咬合圈径调整装置
US20150273674A1 (en) * 2014-03-26 2015-10-01 Testo Industry Corp. Auto-adjusting control device for adjusting clamping sizs of a c-ring nail gun
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018103280B4 (de) 2017-03-01 2022-03-31 Adient Engineering and IP GmbH Befestigungswerkzeug

Also Published As

Publication number Publication date
ATE63492T1 (de) 1991-06-15
IT1208136B (it) 1989-06-06
IT8603615A0 (it) 1986-12-18
ES2023881B3 (es) 1992-02-16
GR3002471T3 (en) 1992-12-30
AU611124B2 (en) 1991-06-06
CA1296167C (fr) 1992-02-25
EP0274710A1 (fr) 1988-07-20
DE3770143D1 (de) 1991-06-20
US4890474A (en) 1990-01-02
WO1988004597A1 (fr) 1988-06-30
AU1059388A (en) 1988-07-15
BR8707591A (pt) 1989-03-14
MX168952B (es) 1993-06-15

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