DE1935783A1 - Pneumatic stapling or nailing machine - Google Patents

Description

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Register Umberto Monacelli? Bidasono / Italy, Via del Parco.

Pneumatic stapling or nailing machine.

Priority ! Italian application number 19180 / A / 68 from, March 1st, 1968,

Pneumatic stapling or nailing machines, such as that described in commonly assigned Italian patent 726 337, comprise a hollow body, in Which a cylinder is arranged in which the piston carrying the percussion hammer can be displaced under the action of compressed air, which via an actuating tap controlled distribution valve is admitted.

As is well known, the performance of a device of the type mentioned for a certain pressure value of the compressed air certainly depends on the Diameter of the cylinder and the stroke of the piston, but is they also strictly adhere to the ratio between the volume of compressed air used at each launch and the volume of compressed air bound, which is present in the dining room in body around the entrance of the cylinder. For a correct and effective Operation of the device it is therefore absolutely necessary that the dimensioning of the body and thus its cavity is adapted to the optimum value, which corresponds to an exact ratio determined by experience. This is the main reason that the user can use stapling or nailing machines with different capacities depending on the work requirements to be able to have a considerable number of tools available, which are differently sized in their entirety.

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The invention aims, within certain limits the change in the performance of a pneumatic stapling machine to enable and eliminate the need to replace the entire body of the device.

The basting or Magelmaschine according to the invention is characterized in that the main body is divided into two parts, namely an upper head part, in which the distributor valve is located and a lower portion, in which the cylinder angeord- "net, wherein the head part can be fastened tightly and interchangeably with other head parts of different dimensions to change the volume of the dining area on the lower part.

The division of the body into two parts along one, the Dining room level has various advantages, among which the following should be emphasized are :

a) Possibility of change (e.g. enlargement) the performance of a stapling * or nailing machine while maintaining

| treatment of the actual body (lower part) by simple Attachment of a cylinder allowing a larger stroke and attachment of a "head section of greater height for enlargement the volume of the dining room;

b) Possibility of very easy machining of the head— jteila (valve seats, sliding surfaces, etc.) while achieving a degree of quality that is certainly greater than that which is currently available for the devices for which the

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Body and head part are made in one piece;

c) Reduction of machining waste and ease of replacement of delicate parts (valves and associated sliding surfaces) without having to replace the entire body;

d) Ease of realization of cast bodies be it in falling cast, be it in die cast after easily removable Cores of large dimensions can be used;

e) greater ease of inspection and cleaning of the internal organs after removing the headboard.

An embodiment of the invention is given below Explained in more detail with reference to the drawing,

1 shows the stapling or nailing machine in perspective

Opinion, *

Fig.2 illustrates the various components of the body of the machine, " Figure 3 is a partial vertical section through the body

the machine and Fig.4 is a section analogous to Fig.3, but with a exchanged headboard.

The stapling or nailing machine shown is known per se and has a hollow body 1 aug, from which a likewise hollow handle 2 protrudes laterally, which is provided with a connection is provided for connection to a compressed air line. The machine also has a magazine 4 for the staples or staples which emerge one after the other through the guide plate 5, Ia hollow body 1, a cylinder 6 is arranged in which a Piston 7 can move sealed, on which the hammer 8 is attached to A driving out the hail. The upper opening

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dos cylinder 6 is closed by an annular plug 9 or opened, which is controlled by a differential valve 10 will. The body 1 is closed at the top by a cover 11.

The performance of the device depends on the pressure of the wasted Compressed air mainly depends on the diameter of the cylinder 6 and the stroke of the piston 7, but as I said, it is also strict to the volume of the space 12 between which the cylinder 6 opposite the hollow body 1 sealing ring I3 and the lower sealing ring of the distribution valve 10 bound, in which there is compressed air ready to enter the cylinder as soon as the plug Q is raised.

In the current best 1 stapling or nailing machines, the body is made in one piece and dimensioned in such a way that the ratio between the cylinder displacement and the volume of the space 12 has the aforementioned optimal value. In order to pass from a device with a power χ to one with a higher power y, as a result, in these known devices, not only a different cylinder but also a different body must be used, the dimensions of which must meet the above-mentioned requirements.

In the stapler or agelmaschine according to the invention, the body is divided into two essential parts, of which the lower part consists almost entirely of the body 1 and contains the cylinder 6, while the upper or head part 1 'contains the distributor valve 10 and with is firmly screwed to the lower part. The separating

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level between the two parts naturally crosses the Hardly 12.

If you want to change the performance of the device in this case, the main body 1 does not need to be replaced, but only needs a different cylinder ή, for example with a greater length (to increase the stroke) and the head part I ¹ (Big. 3 ^ be replaced by a new head part 1 "(Fig.4 ^, which has a greater height, so that the volume of the space 12 is proportional to the new cylinder ₁ -derhubrauin larger.

Another advantage of the invention is the possibility the sliding seats of the differential valve ii of the inner radial surface of the head part 1 'to edit easily and more precisely, as well in the case of wear of these sliding seats, which are the most sensitive part for the proper operation of the device, only the head part 1 'can be exchanged easily and with considerable cost savings on its own to be able to.

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Claims (2)

PA TE Ί TA: 3 CHALLENGES / l. Ordering a compressed air stapling or nailing machine from a hollow body in which a cylinder is arranged, in which a piston carrying the hammer can be displaced under the action of the compressed air which is poured into the cylinder via a distribution valve controlled by an actuation trigger, characterized in that the main body is divided into two parts, of which the upper head part contains the distributor valve and the lower part the cylinder, the head part being tightly fastened to the lower part and replaceable with another head part with different dimensions, to the volume of the compressed air supply space to change the opening of the eyelid. 2. stapling or "agelmaschine according to claim 1, characterized in that that the rhyme plane between the head part and the lower part runs essentially transversely to the extension of the cylinder axis and traverses the feed space of the compressed air. SAD OBiGlNAL
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