DE1924957A1 - Pressurized drive or impact device for fasteners - Google Patents

Description

S ν; incline Inc., 32-00 Skillman Avenue, Long Island City, New York, USA

Pressure medium-operated driving or impact device for fasteners.

The invention relates to a pressure-actuated driver Impact device; for fasteners such as nails, Pins, brackets or the like. Which essentially consist of a housing, a reciprocating and sealing in the The housing can be moved in the working and reversing or rest position Piston and from one the Druckmittelbeaufschla ^ ung des Piston, its working stroke and return stroke and the discharge of the pressure medium from the piston at the end of the working stroke controlling system exists, and the aim is to improve such devices, in particular by providing a special System for returning the piston to its starting position.

usually find two types of systems for return movement von Ivolben in such pressurized devices use. This can generally be called a spring return or pressure fluid return systems. Latter -can again split nan into two general types, viz into those that work with a single piston and those that work with double pistons. The invention will the simple piston system applied.

The fluid return system of the invention can be specifically defined as a system which operates with an "enclosed" fluid. For this purpose , a chamber is provided to enclose the pressure medium, which is filled during the throw-off or working stroke of the piston. ! Jenn the piston is at the end of its "working stroke is reached, the pressure medium is in the collection chamber under high pressure and moves the piston back into its initial position,

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when the working side of the piston is relieved of pressure medium will.

The known systems for returning the piston, which work with enclosed pressure medium, have a large number of disadvantages. Is exerted ¹ at the completion of the work of the piston shubes a very strong pressure force on the piston, which pushes it back into its initial position. This movement is then very violent, which leads to increased vibrations and thus easily to destruction of the device.

If you use such a device together with a slide control to control the pressure flow, whereby the Gate valve normally against the top surface of the piston is applied, the slide valve will vrird after a relatively short time damaged and the entire device can no longer be used. In known systems of the type described, the pressure medium is fed into the collecting chamber through an opening inserted on the side of the piston. Hence a special poetry must be; be provided for normal sealing of the opening. Since the device is operated during the standing time, is the seal gradually destroyed and thereby the entire 'device; unusable.

The object of the invention is now to eliminate the disadvantages the known devices and the creation of a tool of the type described above, which works quietly and a has a long service life, while at the same time value a simple construction is laid.

This object is achieved by a device in which a pressure medium return chamber and at least one with this Chamber-related hole provided in the working cylinder. hen are. The bore or the bores are located here in the piston advantageously at a distance from its side surfaces.

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In this way it is superfluous to provide special seals, while at the same time a dampened, less violent one The piston moves back.

Another advantage of the invention is that the individual parts of the device are relatively simple and the number of required Seals are very small. Also is the efficiency des ArbeitshubesMmu the grooves of those passing each other Parts much less than in the known devices, since the piston only one during its movement causes very little friction. So the device receives a very long service life, which is especially reinforced by the fact that the piston at the end of its working stroke on a preferably insane. Enclosure provided buffer hits and advantageously has a driving piston which can be moved easily and without a seal in this buffer and the housing. Because of this lack of sealing between the driving piston. on the one hand and the buffer bzvr. the device housing on the other hand at the same time confuses the derivation of anything still in the working chamber after the return stroke of the piston causes excess pressure medium in the atmosphere.

In such devices, in the normal case Compressed air is used, but any other conventional one can also be used Pressure medium reach Hincatz, but then possibly not an escape into the atmosphere, but where appropriate in Oarcc 11eitunken or d / 1. he follows.

The invention is now illustrated with the aid of the particularly advantageous exemplary embodiments given in the drawings. In the drawings shows

Pig. 1 is a side view of the tool according to the invention, Figure 2 is a top plan view of the Pig. I,

Pig. 3 shows a section along line 3-3 of the ^ i * -. 2, weave? the parts are in the normal resting position,

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Fi3. 4 is a partially sectioned side view of the Tool in the most fluid working stroke position,

FIG. 5 shows a section along the line 5-5 in FIG. 4 and

FIG. 6 shows a perspective partial section along the line 6-6 in FIG. 5.

The driving device or machine 11 for the fastening means according to the present invention is essentially formed from a housing 12 on which a handle 13 is seated. A magazine 1h is also provided thereon, in which a large number of fastening means xtfie nails 15 are arranged, which are processed one after the other. In order to convey these nails 15 in a sequence and to feed them to the processing point, a feed device is provided which, however, is just as little subject matter of the present invention as the magazine, so that no more detailed description needs to be given here. A wide variety of magazines and feeding devices could be used here, for example those according to American application no. 695 538 of December 4th

Inside the handle or holder 13 is a pressure chamber 16 provided, 'plural marriage with a printing medium supply is connected via a connector 17.

The chamber 16 is connected to a lower valve control chamber 19 via a line 18. This chamber 19 becomes permanent the entire operation of the device is subjected to pressure.

Furthermore, an upper valve control chamber 20 is provided, to which a line 21 leads, which in turn is connected to a line connected to a switch housing 23 stands. A switching element 24 carries a coil or piston

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disk 25, which is normally in its lower position is held by a coil spring 26.

The switch housing 23 has an opening 27 opposite the atmosphere, however, is usually that mouth closed by "the piston disk 25 from the atmosphere.

An articulated lever 28 is provided for actuating the switching element 2k.

A slide valve 29 has a lower slide surface 30, which normally against the upper surface 31 of a Piston 32 is applied. The slide valve also has a upper slide surface 33.

The lower slide surface 30 has a smaller T'Jirkflache than the upper slide surface 33.

The slide valve 29 is also equipped with a slide opening 34. This opening ~ 5k acts on a line 35 which Murc / tt atmosphere is open and is located at a distance from a seal 36 ', a valve coil spring 37 presses the slide valve 29 in the jTormal- or rest position in the normal conditions of the i-ierkzeuges as in Pig * 3 is shown.

From the piston 32 see a drive or Percussion piston 38 down, with which one after the other the 15 processed, i.e. driven in .. _

The piston 32 is provided with a number of bores 39 and is sealingly movable to and fro in a working chamber HO. The sealing of the piston 32 in the working chamber ^; t0 takes place by means of an 0-ring 4i

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In addition, a backflow chamber 42 is located in the housing 12 provided, which has an opening 43, which in turn . with corresponding recesses 44 in a buffer 45 in connection stand. The buffer 45 is from the piston 32 on The end of the working stroke of the piston is applied.

In a preferred Ausführurt ^ of the invention is sForm zvredes achieve optimum! Iirksamkeit the device, the volume of the Paickflußkamrner 42 ehensogroß as that of the working chamber 40. In addition, the need Que ^rs chnittsflachen the bores 39 in the piston 32 in one, reasonable proportion to the Arbeite- or ^Tr 5.rkfl "che of J'olbens selbs't are" Γ Tan readily recognize as £ if clie holes are too small, the device does not position correctly in the Ψ output returns because the Pa "ckflußkammer 42 not is filled with pressure medium. On the other hand, the device will not work properly if the bores 39 are too large, since the pressure medium flows through the bores into the return flow chamber instead of driving the piston, and the piston will also not return properly to its starting position, since that Pressure medium flows out of the bores of the piston. There is therefore a very specific area for the ratios of the bore area t piston area _t , which the device does not work when it is exceeded or fallen below.

In a particularly preferred embodiment of the invention, the piston 32 has a diameter of 5 »4 cm (2-573 inches), while the bores 39 in the piston 32 a ; Have diameters of 0 _r 23S cm (corresponding to 3/32 ") ■ ¥ hen the total cross-sectional area of the bores 39 25% (fünfundzvranzig: percent).! Exceed the Hirkflache of the piston 32 •, DLE is the device firlcsairikeit substantially diminished, so that no satisfactory work results are achieved. On the other hand, the work result will be unsatisfactory if the overall cross-sectional

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The cross-sectional area of the bores in the piston is less than 5 % (five percent) of the total effective area of the piston.

The mode of operation of the device is now as follows:

The pressure medium flows via the connection piece 17 into the pressure medium chamber 18 and into the lower valve control chamber 19. At the same time, the pressure medium flows due to the position of the switching element 24, as shown in Fig. 3, \ via the line 22 and the line 21 into the upper one Valve ^! Control chamber 20. The slide valve 29 is pressed down by the coil spring 37. Although the upper slide surface 23 of the slide 29 has a larger effective surface _; than the lower slide surface 30 has, the forehand ^; The difference in the areas is not sufficient to push the slide into the lower position without the aid of the spring 37.

In this position of the slide, the lower slide surface 30 rests against the piston 32, and the piston is in its normal position. Furthermore, the line 35 is connected to the slide opening 34, as a result of which there is an opening to the atmosphere. ^T .Jenn the switching member is pushed by movement of the articulated lever 23 24, the piston disc is moved into the position shown in Fig. 4 layer 25. This opens the line 22 to the atmosphere and the pressure medium can no longer flow into the switch housing 23, since the piston disk 25 now closes the flow of the pressure medium. This causes the pressure medium located in the chamber 20 to flow out into the atmosphere. In this l'else the pressurization of the upper slide surface 33 'ends whereby the pressure in the lower valve control chamber 19 the slide 29 in the in Fig. 4. position shown raises the slider' opening '34 now abuts the Abdichtunr 36 and

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_o, _ 1924857

the connection between the opening 34 and the line 35 is interrupted. The pressure medium now flows from the lower valve control chamber 19 into the working chamber 4.0 and causes the downward movement of the piston 32. As a result, the percussion piston 3 hits a hail 15 and drives it in. At the same time pressure fluid flows through the bores 39 cles piston 32, wherein openings through the recesses 44 of the buffer 45 and through CIn 43 flows and the reflux -? Rougher 42 anfallt. This pressure medium flow serves, at the same time, to cool the buffer 45 and thus to increase its service life.

Dar; . "ndstadiun des Arbei ^ s'-mber, is shown in 5 ¹ I ^,. 4, where the piston 32 sleeps on the buffer 45.

When the switch 24 is now relieved of pressure, the spring 26 pushes the switch 24 back into its iTomallage. In this position the piston disk 25 blocks the connection between the switch housing 23 and the atmosphere, green ^; >: However, the pressure medium flow into the lines 22 and 21 is lighted. As a result, the upper valve control chamber 20 is pressurized and the slide 29 is moved into the position shown in Figure 3, since the surface of the upper slide surface 33 is larger than the actual surface of the lower slide surface 30. Now, the slide opening 34 moves away from the seal 36 and is connected to the line 35 running out into the atmosphere. Thus, the pressure medium flows above the At the same time, however, the return chamber 42 is filled with pressure medium. This pressure medium causes the piston 32 to move upwards, which returns to its starting position 34 and line 35 to atmosphere. This return movement when the piston 32 reaches the position shown in Fig. 3 is extraordinary,

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gently so that the slide 29 is not damaged »

In a particularly preferred embodiment of the invention is the Eintreibkoiben Jo neither ^ ep; en the buffer 45 still belt the housing 12 sealingly movable. Much more there will be a certain amount of leakage in the lower Part of the drive piston 38 accepted, but what is nowhere near sufficient to cope with the return stroke of the To make the system ineffective, but rather this fact contributes to the fact that what is still in the process of being superfluous Pressure medium after reaching that shown in Fiß * 3 La [* e can flow out into the atmosphere.

The invention is of course not limited to the in the exemplary embodiments illustrated and described limited specific forms, which are only for the 'better Explanation of the invention. Rather are these are undoubtedly certain for the skilled person specific execution examples possible without this the invention area is left.

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Claims (7)

S w 1 η α Π η e Ino » _# -32-OO Skillman Avenue., ..: Long Island City, Hew Yovkj USA. ■■■ .: Press center! Activated BiniJreib · © of the Bchlagyorriehtung for Claim © ί Druckmittelbet ^ ti ^ te Kin drifting for fastening £ un? * Snittel ule IT "EeI ₄ pins, clips or d ^ l", uelche in iresent from a housing, from a reciprocating and sealing in the housing in the working and reversing or rest position pistons and from one the pressure medium information; uni: the piston, its working stroke and return stroke and the way in which the pressure caliper moves from the piston to the working stroke controlling system, characterized in that da. j a pressure medium return flow scanner (42) and iv. at least one rait this I-Iammer related ⁷ -? ohrunf; (39) "are provided in the piston (32). 2) \ ^ orrichtun ^r s according to claim 1,
thereby identified, that one at the end of the working stroke of the piston (32) of this beaufschlacter buffer (45) is provided, much » rather with the reflux canister (42) and the Γ-olhenboh « round (39) related extensions (44) owns. 3) Device according to claim 1 or 2, characterized in that that a working chamber (40) is provided for the piston (32), the Rückflußkanmer (42) having the same volume like the working chamber (40) has * 9098Λ8 / 0765 4) Device according to one of claims 1 to 3, characterized in that the piston bores (39) are essentially vertical are arranged and at a distance from the side surfaces of the piston (32). 5) Device according to one of claims 1 to 4, characterized in that the control system consists essentially of a switch (24, a slide valve (2?) And the return flow manner (42) as well as a connecting these parts or rooms, partially re ^ en the atmosphere opening pipe system consists. o) Device according to claim 5, characterized in that - the spool valve (25) is equipped with various sizes of V'irl: surfaces (30, 33) and ^{: r} ~ e ^r -cm never i ' rpft a '"caraubcnfodcr (37) bevc ^ llcli is arranged. 7) device "according to claim 6, characterized ^ ekennaeicimnt because", ias slide valve has a vorzu ^ c-rcise centric c.nf-eordn.ete A:; ial "ffnun ^ (3'I), the i-" hearing of the arboitshubon through a seal (3'j) i; '-3eh; ^: .use (12) prefix :: - is. "■ £) Vorrichtun- according to one of claims 1 to 7, characterized in that ^a. The" olbon (? 2) in a buffer ⁽¹ I?) And the housing (I ") corpse and dichtun.-tsfrei movable "driving piston aufi-reir.t. 90 984 87 0765 BATH ■ J'4- Empty soap