DE1207300B - Tool operated with compressed air for driving in head nails - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

B 25c

German class: 87 a-18

Number: 1207300

File number: M36315Ic / 87a

Filing date: January 3, 1958

Opening day: December 16, 1965

The invention relates to a tool operated with compressed air for driving in head nails, in particular upholstery decoration nails, on the side of the housing at the level of a hammer a cup-shaped, closed nail magazine is arranged as a guide serving as a nail ejection channel, from which the nails under the action of compressed air through a perpendicular to the nail ejection channel Feed channel can be fed into the nail ejection channel.

In a known tool of this type, the nails are directly in the cup-shaped magazine and brought into circular motion exclusively by compressed air, it being provided that one of the whirled around nails radially from the inside into one located in the magazine wall and adapted to the nail shape Passage slot, however, on the outside of the magazine wall through part of the Tool housing is covered except for a small opening through which a small amount of compressed air can flow out of the magazine through a channel into the open air. To the so in the passage slot of the To be able to feed the nail held in the magazine wall to the nail ejection channel, this must be like a stepped piston trained cup-shaped magazine by the action of compressed air in a surrounding the magazine Guide housing can be moved axially into a feed position, whereby the through slot the magazine wall in front of an overflow channel in the tool housing that opens laterally into the nail ejection channel reaches, so that the nail is now conveyed out of the magazine wall into the nail ejection channel by the action of compressed air. However, there is not guaranteed that with the necessary axial displacement before the feeding of each individual nail of the cup-shaped magazine, one of the swirled nails is also in the correct position in the Through slot of the magazine wall is located. In addition, requires the axial displacement of the whole Magazine requires a corresponding structural and manufacturing effort.

The aim of the invention is to avoid these disadvantages and to provide a tool of the aforementioned type to be trained in such a way that its impact performance in the unit of time is as high as possible, i.e. rapid impact a larger number of nails can be achieved with certainty and at the same time a trouble-free one Working of the tool is guaranteed.

This is achieved according to the invention in that above the bottom of the designed as a hollow cylinder Magazine space around the hollow cylinder axis parallel to the nail ejection channel of the tool

Compressed air tool for
Driving in head nails

Applicant:

Joh. Friedrich Behrens,

Ahrensburg (Holst.), Bogenstrasse

Named as inventor:

Walter Möhrke, Wickede / Ruhr

is rotatably mounted, which is preferably driven by compressed air on its underside and on its Upper side receives the nails, some of which under the action of the rotation of the disk and that between the Disc edge and the magazine wall on top of the disc and through the feed channel escaping compressed air get with their heads on the upper edge of the magazine, on and off which slide the nails with their heads into the feed channel leading to the nail ejection channel. Included the magazine is expediently designed so that the magazine space is closed off by a cover is that between the nail heads sliding on the upper edge of the magazine and the lid only a small amount of play remains.

The subject of the invention is therefore more advantageous Way achieved that the magazine can hold a larger amount of nails and from her under the centrifugal effect of the disc as well as being carried along by the air flow is always sufficient Number of nails aligned individually through the feed channel in the path of the driving ram is directed.

The invention is explained in more detail below on the basis of an exemplary embodiment that is represented by the Drawing is illustrated, namely shows

F i g. 1 shows a side view of the tool and partially an axial section through the magazine, while F i g. 2 shows a section along line II-II of FIG. 1 represents.

The actual tool consists of a handle 3 with a connection for the operating compressed air and a cylinder 16 in which a piston 4 is led. The piston 4 carries a driving ram 5, for which a guide at the lower end of the cylinder 16

509 758/69

tion 5 α as the discharge channel for the supplied Head nails 14 (Fig. 2) is provided.

A cylindrical magazine 2 is attached transversely to the guide 5 a and axially parallel to it, which can be closed airtight by means of a pressure spring 6 by means of a S cover 7 which can be removed for filling in the head nails. Above the bottom of the magazine 2, in its interior 2 a, a disk 8 with a radially corrugated surface is rotatably mounted by means of an axis 2 &; the disc 8 can be equipped with blades on the underside. The disk 8 is set in rotation by compressed air which flows from the handle 3 through a line 15 via an inlet channel 9 provided in the housing and a regulating valve 10 tangentially to the underside of the disk 8. The speed of rotation of the disk 8 can be influenced by the regulating valve 10. Through the annular gap between the cylindrical circumferential surface of the rotating disk 8 and the inside of the magazine wall, the compressed air flows on to the top of the disk. At the upper edge of the magazine 2 there is provided an annular groove 7 α , bounded by a shoulder surface in the magazine wall and the magazine cover 7, from which a feed channel 8 β with a free cross section corresponding to the nail shape runs through the magazine housing and opens laterally into the nail ejection channel Sa.

The head nails 14 filled into the magazine 2 are initially thrown against the wall of the magazine space 2 a under the centrifugal force of the rotating disk 8 and by the flow of compressed air from the bottom to the top of the disk 8, the upright nails with their heads in enter the annular groove la at the upper edge of the magazine while the nail shafts rest against the magazine wall. The nails are then fed individually from their circulating motion into the feed channel 8 a, from which the foremost nail is pushed into the ejection channel 5 a and thus into the path of the plunger 5 in the correct position and is then hammered into the workpiece during the subsequent working stroke. After the return stroke, the next nail comes out of the feed channel 8a into the ram path, and by regulating the compressed air supply by means of the valve 10, the feed speed of the nails can also be adapted to a rapid stroke sequence of the tool. The compressed air escapes through the feed channel 8 a and the discharge channel 5 a into the open.

Claims (2)

Patent claims: 1. Tool operated with compressed air for driving in head nails, especially upholstery decoration nails, on the side of its housing at the level of the nail ejection channel serving as a guide closed nail magazine is arranged, from which the nails under the action of compressed air can be fed into the nail ejection channel through a feed channel running at right angles to the nail ejection channel, characterized in that that above the bottom of the magazine space designed as a hollow cylinder (2 a) to the nail ejection channel (5 a) of the tool parallel Hollow cylinder axis (2 &) a disc (8) is rotatably mounted, which is preferably on its Bottom can be driven by compressed air and on its top receives the nails of which some under the action of the disk rotation and that between the disk edge and the magazine wall on the top of the disc and through the feed channel (8 a) flowing compressed air get with their heads on the upper edge of the magazine, on and off which the nails with their heads slide into the feed channel (8 a) leading to the nail ejection channel (5 a). 2. Tool according to claim 1, characterized in that the magazine space (2 a) through a cover (7) is closed in such a way that between the sliding on the upper edge of the magazine Nail heads and the lid only a small amount of movement remains. Considered publications:
German patent specification No. 597 863. For this purpose, 1 sheet of drawings 509 758/69 12.65 © Bundesdruckerei Berlin