DE2042767A1 - Powder-powered setting device for using collated nails - Google Patents

Description

DR. BERQ DIPL-INQ. STAPF

PATENTANWÄLTE it MÜNCHEN a, HILBLESTRA8SE BO

Attorney's file 19 955 Munich, August 28, 197o

HILTI AKTIENGESELLSCHAFT in Schaan (Principality of Liechtenstein)

Powder-powered setting tool for using collated nails

The invention relates to a powder-powered setting tool for use in a magazine Bolts or nails (hereinafter referred to as nails) the one piston that is axially displaceable in a barrel having.

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It is known that with powder-powered setting tools the introduction of the nails requires a great deal of time. Therefore, in addition to the cartridge magazine, there is also a The aim is to store the nails in magazines.

In the case of shooting devices, the magazining of entire nail-cartridge units is known in particular. Mostly these are Units are arranged in drum-shaped or cuboid-shaped magazines, with the nail-cartridge units running through the device or magazine through feed organs attached to the device or magazine are fed.

This principle cannot be transferred to piston devices, because with these, nails and cartridges are separated, in front of and behind the plunger into the device. Before inserting a new nail, the piston must also be pushed back into its starting position before the new nail can be inserted the barrel can be used.

To solve these problems occurring with piston devices, piston devices have become known in which the nails be arranged in drum-shaped or cuboid-shaped magazines that are rotatably or displaceably mounted in front of the device. However, the weight of such magazines makes the device very top-heavy and therefore unmanageable. Further leaves Do not use such a device in narrow and inaccessible places, as the magazines mentioned are essential extend away from the front area of the device and require a larger construction.

In addition, belt-like magazine strips made of plastic are also known in piston devices, which are fed to the device by means of gear-shaped rotors and during the Driving process are supported. By presence

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such rotors, which have to be arranged in the front area of the device and which protrude significantly above it, have an effect Such a device is unwieldy and cannot be used in narrow and difficult-to-access places. Further are such plastic magazines, for example for steel mill equipment or other devices that are used in places with a lot of heat exposure due to heat sensitivity the plastic is unsuitable. However, especially with steelworks equipment is a quick work sequence and thus Magazining is particularly desirable.

The invention is based on the object of a nail magazine to create a suitable piston device while avoiding the disadvantages mentioned above.

According to the invention, the object is achieved in that the front area of the device barrel of a perpendicular to the main axis of the device arranged channel, which is used for receiving a strip-shaped magazine penetrated by nails is used, is perforated, the channel in a perpendicular to the device axis standing level has introduced guide grooves for the side edges of the magazine tape and in his The height of the nail length measured parallel to the device axis is adjusted.

This has the advantage that, with the lowest magazine weight, the front device area is smaller Dimensions can be maintained and no additional magazine feed organs or magazine parts protruding from the device affects the versatility of the device «. Any one of them is particularly advantageous The length of the magazine strips can be adapted to the space available.

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The rear barrel part adjoining the channel opposite to the driving direction is preferably used to guide the piston. shank.

According to a further proposal of the invention, the front barrel part extending over the entire height of the channel up to the barrel mouth has a larger diameter than that provided for guiding the piston shaft t rear running part and serves to guide the nail head. As a result, the friction on the piston skirt is significantly reduced and nails can be inserted into the barrel bore, the head diameter of which is greater than the diameter of the piston skirt.

The invention will now be explained in more detail with reference to the drawings showing them for example, and although show:

Fig. 1 shows a device according to the invention partially cut with inserted Magazine tape section;

Fig. 2 shows the front part of the device of

Fig. 1 with the magazine not inserted in a perspective and partially sectioned illustration.

From Fig. 1, a device designated as a whole by 1 can be seen. By means of one contained in a handle 2 Withdrawal device 3, a firing pin 4 can be actuated in a manner known per se, which can be acted upon by a cartridge 6 mounted in a cartridge store 5. Due to the powder gases released when the cartridge 6 is ignited, a part 7a of the total number 7 designated barrel bore and in a piston guide 8 axially

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displaceably mounted piston, designated as a whole by 9, driven in the direction of the shot material 11. Located after completion of the driving process of the piston shaft 9d in the front area of the base plate la, is by means of a Handle 12, the piston guide 8 advanced against the tension force of a spring 14 in the direction of the shot material 11 and again completely slipped over the piston head 9a provided with friction elements 13. Due to the tension of the spring 14 the piston guide 8 together with the piston 9, which has a frictional connection with the piston guide 8, transported back into the starting position shown in Figure 1. The return of the piston 9 after the end Driving process, from its front to its rear The starting position can also take place in any other way, but these are not discussed in detail here as this is not part of the invention.

As FIG. 2 also shows in particular, the base plate 1 a is one of two diameters of different sizes Barrel bore 7 as well as from a perpendicular to it, the receptacle of a magazine strip 17 equipped with nails 16 serving channel 15 interspersed. Seen against the driving direction, the rear channel adjoining the channel 15 has Running part 7a a corresponding to the piston skirt 9d Diameter on. The diameter of the following front barrel part 7b as seen in the driving direction is kept larger than the diameter of the rear barrel intended for guiding the piston 7a.

It can also be seen from the drawings that -der Channel 15 contains lateral guide grooves 15a for guiding the magazine strip 17 along its entire length and from the insertion side Ib of the magazine strip 17 to the front barrel part 7b corresponding to the shape and length of the magazine strip 17

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inserted nails 16 is expanded. But it exists to you the possibility of extending the channel 15 along its entire length, i.e. from the magazine inlet side Ib to the magazine outlet side Ic, in such a way. On the exit side Ic is However, this expansion is superfluous because the nails 16 during the driving process by the advancing piston 9 from the Magazine strip 17 are ejected and thus only the empty magazine strip 17a has to emerge. If at the ^ Handling of the magazine strip part 17a emerging from the device 1 has a disruptive influence due to its length it can be shortened with simple means such as pliers, scissors or the like. When pushing out the nails 16 The material of the magazine strip 17 surrounding the nail shaft 16c is transformed from the magazine strip 17 from the nail head 16a punched out. During the further driving process, the nail head 16a together with the punched-out magazine part is guided in the front barrel part 7b.

The advance of the magazine strip 17 is actuated by organs known per se, which will not be discussed in greater detail here because they are not part of the invention.

Furthermore, a recess 9c corresponding to the cylinder-shaped projections 16b of the nails 16 is made in the end face 9b of the piston shaft 9d. This means that during the The driving process establishes an operative connection between the piston shaft 9d and nails 16, which prevents the nails from giving way to the side.

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Claims (3)

Claims Powder-operated setting tool for driving nails held in a magazine, which has a piston mounted axially displaceably in a barrel, characterized in that in the front area of the device ¹ there is a channel (15) directed perpendicular to the main axis of the device, which is intended to receive one of nails ( 16) through which tape-shaped magazine (17) passes, the channel (15) has guide grooves for the side edges of the magazine tape (17) in a plane perpendicular to the main axis of the device and the length of the nail in its height, measured parallel to the axis of the device adjusted 1st. 2) Device according to claim 1, characterized in that the opposite to the driving direction on the channel (15) connecting rear running part (7a) for guiding the Piston skirt (9d) is used. 3) Device according to Anspcch 1 and 2, characterized in that that the front barrel part (7b) extending over the entire height of the channel (15) and up to the barrel mouth has a larger diameter than that of the barrel Guide of the piston skirt (9d) provided rear Has running part (7a) and that the front running part (7b) with the larger diameter is used to guide the nail head (16a). 209810/0212 Le e rs e i te