Metal working – Means to assemble or disassemble – Overedge assembling means
Reexamination Certificate
1999-12-22
2001-08-21
Jones, David (Department: 3725)
Metal working
Means to assemble or disassemble
Overedge assembling means
C072S391400
Reexamination Certificate
active
06276037
ABSTRACT:
CROSS-REFERENCES TO RELATED APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a riveting tool for setting blind rivets and/or bolts with lock washers, with a mouthpiece to receive blind rivets and a pneumatic device for carrying away broken-off rivet pins from the rivet setting tool, in which the course of the functions relating to the riveting process is released by a press button arranged on the riveting tool, with a valve device for the supply of air to the pneumatic device for removal.
2. Discussion of Relevant Art
Such riveting tools are known and are designed such that they can be used for riveting with rivets of different sizes and types. In the processing of the abovementioned rivets with the rivet setting tools that can be found in the state of the art, the rivet pins are separated from the rivet head and are caught in a collecting receptacle which is fitted to the riveting tool. The removal of the rivet pin from the mouthpiece of the riveting tool to the collecting receptacle takes place here by a pin extraction device or pneumatic device by means of which the rivet pins are conveyed from the riveting tool chuck into the collecting receptacle. By collecting the rivet pins, firstly the safety of working is increased, and secondly after the rivets have been introduced with the rivet pin into the mouthpiece, that is, still before the riveting process proper, the rivets are secured against falling out of the mouthpiece by the actuation of the pin extraction device and the thereby ensured suction intake pressure. A possibility of its importance in practice, and in particular for a frictionless course of work, is not to be underestimated.
Several sets of solutions for the provision of the abovementioned intake or extraction suction pressures in the approaches to the riveting process are given in the prior art.
In this connection, the pneumatic supply to the pin extraction device takes place, among other things, in that the pin extraction suction takes place by means of separate compressed air valves at the input of the compressed air supply to the riveting tool or to its head. However, it has been found in practice to be disadvantageous, both that the air supply metering is complicated, since as a rule two hands are required, in order to be able to effect a setting on the appliance, and in order that no automatic shutoff of the compressed air takes place, so that compressed air is often consumed in the pauses and in other work interruptions, even when it is not being made use of at all.
To prevent the described negative results of a pin extraction which operates separately from the proper function of the riveting tool proper, and thus permanently, a riveting tool is given in the state of the art in which a compressed air supply system is arranged in the handle region and consists of a compressed air feed channel, a supply valve and a supply channel, such that by the actuation of a push button over two positions, firstly compressed air is released for intake suction of the rivets, and only in the second operating position is the feed device of the riveting tool actuated. Such a device is described in EP 0 302128 of the Applicant's assignee, MS Verwaltungs-und Patentges.mbH.
Even though the embodiment of the riveting tool described above represents an important advance as a starting point of the development of riveting tools, ergonomic aspects have developed from practice, in particular in use in the industrial field, because of which the use of the existing riveting tool can give rise to problems. The reasons for these problems are, among other things, that the uniting of two functions, namely the intake suction and the working functions, in one press button, is contrary to the aim of automating the sequence of certain work sequences, i.e. to be able to carry them out without mental work, since the user always has to mentally distinguish the two states during the use of the riveting tool.
SUMMARY OF THE INVENTION
The invention therefore has as its object to provide a riveting tool of the category concerned, which avoids the above disadvantages and leads to a riveting tool which is easier to manipulate.
This object is attained by a riveting tool for setting blind rivets and/or bolts with lock washers, comprising: a mouthpiece to receive blind rivets and/or bolts, a pneumatic device to carry away broken-off rivet pins from said riveting tool a pressable device arranged on said riveting tool that releases a course of functions relating to a riveting process, a valve device for supplying air to said pneumatic device to carry away broken-off rivet pins from said riveting tool, and a handle to hold said riveting tool, wherein said valve device includes an actuating device that controls said air supplied to said pneumatic device to carry away broken-off rivet pins, said actuating device being arranged on said handle.
In that a riveting tool of the category concerned is provided with a valve device for the air supply to the pneumatic device for carrying away broken-off rivet pins, wherein the valve device includes an actuating device situated on the handle of the riveting tool or integrated into the handle, for the control of the air supply to the pneumatic device for carrying away broken-off rivet pins, firstly a possibility is provided so that by gripping the tool with the hand, the wording sequences of the intake suction or extraction suction and of the riveting can be mutually changed over separately and ergonomically optimized.
In an advantageous development of the subject of the invention, the actuating device for the actuation of the pneumatic intake suction or extraction suction is arranged directly beneath the press button. The actuating device is hence situated in the handle region of the riveting tool. In this manner it can be insured that an actuation of the actuating device can be carried out with the same hand that holds the riveting tool during the use of the tool. Furthermore, by means of such an arrangement, the result is attained that the actuating process of the valve device is preferably actuated by the middle finger of the hand and in a particularly preferred form is also operable by the middle, ring, and little fingers. Here it was considered that, particularly during prolonged use of the riveting tool, the middle finger, or the three above-named fingers in common, besides the index finger, are suitable for switching an actuating member.
In a particularly positive development of the invention, a control bolt has been found suitable as the actuating device for manual actuation of a valve control pin in the frame of the valve device. The control bolt can be in the form of a pin. If the control bolt or control pin is installed in connection with a valve pin to be actuated, the distance of which to one or more valve chambers is adjustable, it is inserted at a given angle, but preferably perpendicular to the longitudinal axis of the valve pin, in a passage opening beneath the press button. The control bolt then has a substantially, and preferably, cylindrical shape. Such a comparatively simple mechanical embodiment of the actuating device has been found to be particularly robust and practicable. The control bolt or control pin can be made of different materials with suitable strength. Thus metals and also plastics have been found suitable. Here plastics have the known advantage of their light weight and, in crosslinked form, possess a high strength.
In a most positive development of the subject of the invention, the control bolt is fitted into an opening, and has a shape such that it can be actuated in the bolt opening both in the longitudinal direction and also transversely of the longitudinal direction. According to the embodiment, both directions of motion are to be made possible simultaneously or selectively. It is then possible to also adjust the valve control pin very advantageously by means of a tilting motion of the
Jones David
MS Verwaltungs- und Patenges mBH
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