EP1781426B1 - Pistolet a aiguilles - Google Patents

Pistolet a aiguilles Download PDF

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Publication number
EP1781426B1
EP1781426B1 EP05771623.5A EP05771623A EP1781426B1 EP 1781426 B1 EP1781426 B1 EP 1781426B1 EP 05771623 A EP05771623 A EP 05771623A EP 1781426 B1 EP1781426 B1 EP 1781426B1
Authority
EP
European Patent Office
Prior art keywords
needle carrier
material layer
needle
hammer device
anvil
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.)
Active
Application number
EP05771623.5A
Other languages
German (de)
English (en)
Other versions
EP1781426A1 (fr
Inventor
René Amherd
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.)
Von Arx AG
Original Assignee
Von Arx AG
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Filing date
Publication date
Application filed by Von Arx AG filed Critical Von Arx AG
Publication of EP1781426A1 publication Critical patent/EP1781426A1/fr
Application granted granted Critical
Publication of EP1781426B1 publication Critical patent/EP1781426B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
    • B08B7/022—Needle scalers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools

Definitions

  • the present invention relates to a percussion device in the form of a needle gun comprising a cylinder housing in which a movable cylinder slidably supported between two compression springs, wherein in the cylinder, a flying piston reciprocates under the influence of compressed air and delivers a shock pulse to an anvil, on which under pressure from one of the two springs a needle carrier rests and wherein several needles axially slidably store in the needle carrier and rest under working pressure with their terminal needle heads on the anvil.
  • Impact devices of the type mentioned are widely used commercially under the name needle gun and have proven themselves many times in daily use.
  • needle guns are used to clean surfaces, for example, to remove old paint residues or remove rust layers.
  • the operation and construction of the needle guns leads to high material loads. Accordingly, one has often improved the impact devices of interest here in order to increase their service life.
  • EP-A-0'152'376 discloses a striking device in the form a needle gun with the features of the preamble of claim 1.
  • An impact device of the type mentioned is also from the DE-U-84 32 499 known.
  • the main focus was on increasing the service life of the needle gun, this time focusing in particular on the wear problem between the anvil and the cylinder housing.
  • the flying piston reciprocates even when not working and therefore the needles do not abut the anvil. Consequently, since the flying piston continues to deliver its pulses to the anvil, the vibration of the anvil is also transmitted to the needle carrier. Accordingly, the needle carrier, which is pressed by the compression spring 6 against the anvil, also oscillates. The vibration of the needle carrier causes the needles to vibrate practically unencumbered and thereby hit the anvil, which in turn provides the needles with a shock pulse. Accordingly, the needle carrier is now claimed by the needle heads on impact.
  • the needle carrier which is usually made of plastic, is not designed for this type of impact load and is thereby destroyed after a relatively short time.
  • the impact device shown here in the form of a needle gun corresponds in construction DE-U-84 32 499 or the corresponding CH-A-654 513 , Regarding the mode of action, reference is made to the content of these protective rights.
  • the main component of the impact device forms a cylinder housing 1, which is substantially in the form of a Cylinder corresponds with circular cross section.
  • a movable cylinder 2 is slidably mounted and sealed by means of mechanical seals 19 relative to the cylinder housing 1.
  • a flying piston 3 which is provided with a thickened end which runs in a first pressure chamber D 1 , while the opposite, slimmer end of the flying piston 3 is provided with a hammer-like head and in a second pressure chamber D.
  • the thickened piston end is denoted by 25, the slimmer, formed to a hammer head end of the piston 26.
  • the anvil 4 has a steel core 40 and is coated with a thickened sliding ring 41 made of abrasion-resistant plastic. In Gleitring 41 more Druckluftentlastungsnuten 42 are formed in the axial direction.
  • a needle carrier 5 On the anvil 4 rests a needle carrier 5, which has an approximately cup-shaped shape in the embodiment shown here and on its special, inventive embodiment will be discussed below.
  • the needle carrier 5 is pressed under the pressure of the compression spring 6 on the anvil 4 and this in turn on the cylinder 2.
  • the compression spring 6 is supported in the cylinder housing 1 on a shoulder-shaped constriction 18 from.
  • a compression spring 7 which is accommodated at the opposite end in the cylinder housing 1, is supported on a housing cover 9 and rests on the movable cylinder 2.
  • the movable cylinder 2, or its first pressure chamber D 1 is closed by means of a cylinder cover 8.
  • the impact device shown here operates by means of compressed air, which is supplied by a handle 10 from a feed line 11.
  • the handle 10 is formed by a handle tube 13 which communicates via an air inlet 12 in communicating connection with the cylinder housing 1 or with the pressure chamber D 1 and indirectly with the second pressure chamber D 2 . Via a connecting piece, the feed line 11 is connected to the handle tube 13.
  • a handle sleeve 14 is slipped.
  • a valve 17 is arranged, which is manually actuated via an actuating lever 15.
  • the actuating lever 15 is pivotable about the lever axis 16.
  • a T-shaped bore 22 is mounted, which consists of a central axial bore 23 and a diametrical bore 24. Compressed air flows via the air inlet 12 into a circulating air supply chamber 27, which is formed in the movable cylinder and flows in through a bore in the movable cylinder 2.
  • the piston is pressed with its thickened piston end 25 in the direction of the cylinder cover 8 until the flying piston is displaced so far that the diametrical bore 24 communicates with the cylinder chamber on the air supply side, whereby through the central axial bore 23, the compressed air into the first pressure chamber D first flows and moves the piston in the opposite direction, which abuts the anvil and the compressed air from the first pressure chamber D 1 flows into the second pressure chamber D 2 via the T-shaped bore 22, wherein according to the anvil lifts from its seat on the movable cylinder 2 and the compressed air via the relief grooves 42, which are also present on the needle carrier 5, escapes. After the compressed air relief, the compression spring 6 pushes the needle carrier 5, the anvil 4 and thus the piston 3 back to the starting position and the cycle is repeated.
  • the needle carrier 5 essentially has a guide plate 50 in which a plurality of needle guide bores 51 are formed.
  • the needle guide bores 51 are regularly distributed over the surface of the circular guide plate 50.
  • the distance between two adjacent needle guide holes 51 is selected so that the needle heads 21 of the needles 20 do not touch each other.
  • an annular wall 52 which in the embodiments according to the Figures 2 and 4 is integrally connected to the needle guide plate 50.
  • the annular wall 52 has a plurality of axially extending circumferentially evenly distributed Druckluftentlastungsnuten 53rd on.
  • the annular wall 52 of the needle carrier 5 serves to support and guide the needle carrier 5 in the cylinder housing 1. Overall, therefore, the needle carrier 5 has a cup-shaped shape, the cup wall rests on the anvil, not shown here. Between the anvil and the guide plate 50 thus remains a cavity 54 which is peripherally bounded by the annular wall 52. In this cavity 54 are the needle heads 21 of the needles 20. If not worked with the impact device, the needles 20 are in the holes 51 so guided in the guide plate 50, that the needle heads within the cavity 54 loosely rest on the guide plate 50. When working with the device, the needles 20 are pressed onto a surface to be machined and the needle heads 21 abut against the anvil.
  • the needles 20 Under the action of the flapping pulses of the flying piston, which are transmitted to the needles 20 via the anvil, the needles 20 are set into oscillating motion. In this case, however, they will normally perform this oscillating movement so that the needle heads do not come into contact with the guide plate 50 of the needle carrier 5. As mentioned above, however, this situation is different when the device operates unloaded. Now, the needles 20 are practically reciprocated over the entire height of the annular wall 52 and meet at a correspondingly high speed on the inner surface of the guide plate 50. In order to avoid corresponding damage to the needles 20 and the needle carrier 5, it is therefore proposed according to the invention to manufacture the needle carrier from at least two layers of material of different hardness.
  • the layers should of course be arranged perpendicular to the direction of the needles.
  • the guide plate 50 with the therein needle guide holes 51 and the annular wall 52 made in one piece and molded, for example, from a plastic. Accordingly, the plastic bottom forms a first material layer 55, on which a second material layer 56 rests.
  • This second material layer 56 is in the embodiment according to the FIG. 2 a metal plate having a hole corresponding to the needle guide holes 51. In principle, this second material layer 56 may be laid loosely.
  • At least one position orientation bead 57 will be arranged on the inside of the annular wall 52 down to the guide plate 50 and the second material layer 56, which is here designed as a protective plate 58, provided with a correspondingly shaped bead.
  • the second material layer 56, or the protective plate 58 can be made of different materials. This may either be a metal plate, preferably a softer material is used here than that from which the hardened needles 20 and their heads 21 are. In addition to relatively soft steel or iron alloys, there are also various non-ferrous metals and their alloys or aluminum. However, it is also possible to manufacture the protective plate 58 or the second material layer 56 of a particularly high-quality plastic, which is correspondingly wear-resistant and impact-resistant.
  • Plastics from the group of PBO, PA or PE are particularly suitable for this purpose. In this case, therefore, both material layers 55 and 56 are made of plastic. In this case, it makes sense to manufacture the harder layer of a material having a hardness of more than 50 ° Shore A.
  • the second material layer 56 cup-shaped as a protective cup 59 may be designed as the FIG. 3 shows.
  • the protective cup 59 can be formed and punched from any metal sheet. The protective cup is then positively and / or non-positively inserted into the needle carrier 5, of course, in turn, so that the holes cover the holes of the protective cup 59 itself.
  • the guide plate 50 is made as an actual plate, which is made of at least one respective first material layer 55 and a second material layer 56. These are, for example, multi-layer plates from which the guide plate 50 with the Needle guide holes 51 is punched out.
  • the annular wall 52 is made separately in this case and consists of a cylindrical ring which may be made of plastic or metal and replaces the original annular wall 52.
  • the separately manufactured support ring 60 can be independently made of any material.
  • the solution according to the FIG. 5 in which practically the needle carrier 5 is designed in two parts, it also makes it possible to provide material layers which have a high elasticity, as a result of which the oscillation behavior of the needle gun can be influenced overall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (11)

  1. Dispositif de percussion sous la forme d'un pistolet à aiguilles, comprenant un carter cylindrique (1), dans lequel un cylindre (2) mobile est logé de manière coulissante entre deux ressorts de pression (6, 7), un piston volant (3) se déplaçant en aller et retour dans le cylindre, sous l'influence d'air comprimé et délivrant une impulsion de percussion sur une enclume (4) sur laquelle un porte-aiguilles repose sous la pression de l'un des deux ressorts de pression (6, 7) et plusieurs aiguilles (20) étant logées en coulissement axial dans le porte-aiguilles (5) et sous la pression de service étant adjacentes à l'enclume (4) par leurs têtes d'aiguilles (21) terminales et par ailleurs, le porte-aiguilles (5) comprenant un godet avec une plaque de guidage (50), caractérisé en ce que la plaque de guidage (50) est composée d'au moins deux couches de matière de différente dureté ou résistance à l'usure, les couches étant placées à la perpendiculaire de la direction d'extension des aiguilles (20) et la couche de matière de la plaque de guidage (50) qui est la plus proche de l'enclume étant composée d'une matière plus dure, respectivement plus résistante à l'usure que la couche successive dans la direction axiale des aiguilles.
  2. Dispositif de percussion selon la revendication 1, caractérisé en ce que la couche de matière de la plaque de guidage (50) qui est la plus proche de l'enclume est composée d'une matière plus résistante à l'usure que la couche de matière successive dans la direction axiale des aiguilles.
  3. Dispositif de percussion selon la revendication 1, caractérisé en ce que le porte-aiguilles (5) est injecté en matière plastique et en ce qu'au moins une couche de matière est conçue sous la forme d'une plaque métallique insérée.
  4. Dispositif de percussion selon la revendication 1, caractérisé en ce que la couche plus dure est composée de métal.
  5. Dispositif de percussion selon la revendication 1, caractérisé en ce que toutes les couches sont en matière plastique, la couche plus dure présentant une dureté shore A supérieure à 50.
  6. Dispositif de percussion selon la revendication 2, caractérisé en ce que le couche de matière qui est la plus proche de l'enclume est choisie dans une matière plus résistante à l'usure, en matière plastique du groupe comprenant le PBO, le PA ou le PE.
  7. Dispositif de percussion selon la revendication 1, caractérisé en ce que le godet du porte-aiguilles (5) est composé de deux parties, à savoir d'au moins une plaque de guidage (50) composée de deux couches de matière (55, 56) et d'une bague d'appui (60) fabriquée séparément en une matière quelconque.
  8. Dispositif de percussion selon la revendication 1, caractérisé en ce que le godet du porte-aiguilles (5) est fabriqué en monobloc en ce que sur la plaque de guidage (50) est moulée une paroi annulaire (52) périphérique, qui par son extrémité libre vient reposer sur l'enclume (4).
  9. Dispositif de percussion selon la revendication 8, caractérisé en ce que le godet du porte-aiguilles (5) est injecté en matière plastique et en ce qu'un godet protecteur (59) à paroi mince, ajusté par complémentarité de forme qui forme une deuxième couche de matière (56) y est insérable.
  10. Dispositif de percussion selon la revendication 8, caractérisé en ce que le godet du porte-aiguilles (5) forme une première couche de matière (55) et une plaque protectrice (58) insérée forme une deuxième couche de matière (56).
  11. Dispositif de percussion selon la revendication 8, caractérisé en ce que la paroi annulaire (52) est munie d'un bourrelet d'orientation (57) qui permet une insertion positionnée d'un godet protecteur (59) ou d'une plaque protectrice (58) dans le porte-aiguilles (5).
EP05771623.5A 2004-08-26 2005-08-24 Pistolet a aiguilles Active EP1781426B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH13992004 2004-08-26
PCT/CH2005/000493 WO2006021121A1 (fr) 2004-08-26 2005-08-24 Pistolet a aiguilles

Publications (2)

Publication Number Publication Date
EP1781426A1 EP1781426A1 (fr) 2007-05-09
EP1781426B1 true EP1781426B1 (fr) 2017-04-26

Family

ID=34973817

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05771623.5A Active EP1781426B1 (fr) 2004-08-26 2005-08-24 Pistolet a aiguilles

Country Status (7)

Country Link
US (1) US7861798B2 (fr)
EP (1) EP1781426B1 (fr)
JP (1) JP4624418B2 (fr)
CN (1) CN101052479B (fr)
CA (1) CA2576244A1 (fr)
RU (1) RU2370358C2 (fr)
WO (1) WO2006021121A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8534527B2 (en) 2008-04-03 2013-09-17 Black & Decker Inc. Cordless framing nailer
US9216502B2 (en) 2008-04-03 2015-12-22 Black & Decker Inc. Multi-stranded return spring for fastening tool
CH699690B1 (de) * 2008-10-03 2012-07-31 Arx Ag Rollenhaltereinheit.
CN201692969U (zh) * 2008-12-02 2011-01-05 国际壳牌研究有限公司 振打装置
CN103567847A (zh) * 2012-07-27 2014-02-12 江苏宇天科技有限公司 一种气动除锈枪
CN104384818B (zh) * 2014-10-30 2017-08-11 叶建辉 金属表面专用除锈机
WO2018180832A1 (fr) * 2017-03-29 2018-10-04 日東工器株式会社 Burin à air comprimé
CN109894960B (zh) * 2019-03-27 2024-04-02 广州力多机器人智能科技有限公司 一种除锈机

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US2923937A (en) * 1956-05-03 1960-02-09 Automatic nail gun
CH600993A5 (en) * 1976-06-30 1978-06-30 Arx Ag Percussion tool for cleaning surfaces
JPS5982682U (ja) * 1982-11-22 1984-06-04 日東技研株式会社 衝撃工具
SE436988B (sv) * 1983-07-01 1985-02-04 Nilsson Goran Alfred Anordning vid nalhacka anordning vid nalhacka
CH654513A5 (fr) * 1983-11-04 1986-02-28 Arx Ag Appareil a percussion.
CH655682B (fr) * 1984-02-09 1986-05-15
SE452426B (sv) * 1985-06-19 1987-11-30 Eskil Sundstrom Vibrationsdempande handtag
JPH0368787U (fr) * 1989-11-10 1991-07-08
US5251367A (en) 1991-08-21 1993-10-12 Equipment Development Company, Inc. Pneumatically driven descaling tools
DE4414342A1 (de) * 1994-04-25 1995-10-26 Hilti Ag Handgerät zum Abtragen von Oberflächen
SE508812C2 (sv) 1996-03-14 1998-11-09 Goeran Nilsson Tryckmediumdriven slagmekanism
CN2290453Y (zh) * 1997-03-03 1998-09-09 罗侣旦 风凿
CH690063A5 (de) 1999-02-11 2000-04-14 Arx Ag Presswerkzeug.
ES2193930T5 (es) 1999-11-24 2007-04-01 Von Arx Ag Herramienta de prensado y su metodo de mando.
ATE248045T1 (de) 2000-01-07 2003-09-15 Arx Ag Presszange
DE50111613D1 (de) 2000-05-25 2007-01-25 Arx Ag Presswerkzeug für die Verpressung von Kupplungselementen
CN2476394Y (zh) * 2001-04-04 2002-02-13 卢乃元 气动除锈机
CN1262395C (zh) 2001-06-19 2006-07-05 沃恩阿克斯公开股份有限公司 用于压制连接元件的带有螺纹心轴的挤压工具

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
CN101052479B (zh) 2011-02-16
RU2007110817A (ru) 2008-10-10
CN101052479A (zh) 2007-10-10
RU2370358C2 (ru) 2009-10-20
US7861798B2 (en) 2011-01-04
JP2008510628A (ja) 2008-04-10
EP1781426A1 (fr) 2007-05-09
WO2006021121A1 (fr) 2006-03-02
JP4624418B2 (ja) 2011-02-02
US20080185164A1 (en) 2008-08-07
CA2576244A1 (fr) 2006-03-02

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