EP3656507A1 - Driving device - Google Patents

Abstract

Driving-in device (20) comprising a housing (21), a drive accommodated in the housing (21) for driving a fastening element into a subsurface, a pressure sensor (22) which can be displaced relative to the housing (21) in a driving-in direction (23) Pressing against the substrate, and a first deflecting element (30) which projects in the driving direction (23) over the housing (21) and has a first deflecting slope inclined at an obtuse angle (α1) to the driving direction (23).

Description

The invention relates to a driving tool, in particular a hand-held driving tool.

Driving-in devices usually comprise a housing, a drive accommodated in the housing for driving a fastening element into a subsurface, and a pressure sensor that can be displaced relative to the housing in a driving-in direction for pressing against the subsurface.

If access to a fastening point is limited, for example due to parts protruding from the surface or a device to be fastened, there is a risk that the housing will get caught on one of the protruding parts, so that the driving tool cannot be pressed as desired onto the surface and / or the housing is damaged.

It is the object of the invention to provide a driving tool in which pressing against a surface is facilitated.

This object is achieved in a driving tool comprising a housing, a drive accommodated in the housing for driving a fastening element into a substrate, a pressure sensor which can be displaced relative to the housing in a driving direction for pressing against the substrate, and a deflecting element which in the Closes driving-in direction with an end projecting over the housing, which is inclined at an obtuse angle α relative to the driving-in direction. The inclination of the end face relative to the driving-in direction allows the driving-in device to slide off on a part protruding from the ground or the device to be fastened, so that the risk of getting caught on it is reduced. Under certain circumstances it will protruding part pressed during a pressing of the driving tool to the ground so that the accessibility of the driving point is additionally improved by the driving tool.

The drive preferably comprises a piston which is moved towards the fastening element in order to drive the fastening element into the ground. The piston in turn is accelerated, for example, by burning a solid, liquid or gaseous fuel, by means of compressed air, by a tensioned spring, by a flywheel or by means of electrodynamic forces. The pressure sensor is preferably used to release a driving-in process only when the driving-in device is pressed against a surface.

An advantageous embodiment is characterized in that a projection of the end face on a drive-in plane oriented perpendicular to the driving direction extends at least from an inner radius r _i to an outer radius r _a , the end face in the entire area between the inner radius r _i and the outer radius r _{a is} inclined relative to the driving direction by an obtuse angle α greater than 125 °, preferably greater than 135 °, particularly preferably greater than 140 °. This makes it easier for the driving tool to slide off a surface or the device to be fastened. The inner radius r _i is advantageously less than 40 mm, preferably less than 30 mm, particularly preferably less than 25 mm. The outer radius r _a is also advantageously greater than 40 mm, preferably greater than 50 mm, particularly preferably greater than 60 mm.

An advantageous embodiment is characterized in that a projection of the end face extends on a drive-in axis oriented parallel to the driving direction at least from a front end s _i to a rear end s _a , the end face in the entire area between the front end s _i and the rear end s _{a is} inclined relative to the driving direction by an obtuse angle α greater than 125 °, preferably greater than 135 °, particularly preferably greater than 140 °. This makes it easier for the driving tool to slide off a surface or the device to be fastened. The pressure sensor advantageously has a pressure end which is pressed onto the substrate, the front end, when the driving tool is pressed on, a distance s _v projected onto the driving axis from the pressing end of less than 100 mm, preferably less than 80 mm, particularly preferably less than 70 mm, having. In a pressed-on state of the driving tool, the rear end likewise advantageously has a distance s _h, projected onto the driving axis, from the pressing end of greater than 100 mm, preferably greater than 120 mm, particularly preferably greater than 130 mm.

An advantageous embodiment is characterized in that the deflector element is made of a harder material than the housing, at least on the end face. The deflector element preferably consists entirely of the harder material. The deflecting element likewise advantageously consists, at least on the end face, preferably completely, of a material which comprises a metal and / or an alloy, preferably steel.

An advantageous embodiment is characterized in that the deflecting element is firmly connected to the housing. The housing preferably comprises two housing parts, between which the deflecting element is arranged, particularly preferably clamped. An alternative embodiment is characterized in that the deflecting element is firmly connected to the pressure sensor.

An advantageous embodiment is characterized by a magazine for fastening elements, the deflecting element projecting over the magazine in the driving direction.

An advantageous embodiment is characterized in that the end face extends in a direction rotating with respect to the driving direction over a rotation angle of at least 90 °, preferably at least 150 °, particularly preferably at least 180 °.

An advantageous embodiment is characterized in that the end face comprises a preferably flat end face. The end face likewise advantageously comprises a preferably straight end edge.

Fig. 1

schematisch ein Eintreibgerät,

Fig. 2

teilweise ein Eintreibgerät in einer Schrägansicht,

Fig. 3

teilweise ein Eintreibgerät in einer Aufsicht und

Fig. 4

teilweise ein Eintreibgerät in einer Seitenansicht.

A preferred embodiment of the invention is described below and explained in more detail with reference to the accompanying drawings. Show it:

Fig. 1

schematically a driving tool,

Fig. 2

partly a driving tool in an oblique view,

Fig. 3

partially a driver in a supervision and

Fig. 4

partially a driving tool in a side view.

In Fig. 1 a hand-held driving tool 15 is shown schematically. The driving tool 15 has a housing 1 with a grip area 1a and a grip bridge 1b and a magazine 2 adjoining the grip bridge 1b for receiving nails (not shown) or other fasteners that can be driven in. In the housing 1, a drive for driving the fastening elements into an underground, not shown, is accommodated, the drive comprising a combustion chamber 3 and a piston 3a which is fixedly connected to a driving plunger 3b. A fan 4 driven by an electric motor 4a is arranged in the combustion chamber 3 in order to improve the mixing of air and fuel and the exchange of exhaust gas and fresh air.

The fuel is stored in a tank 5 in a lower area of the housing 1. The fuel is liquefied petroleum gas, for example propane or other suitable gases. The tank 5 is therefore a pressure accumulator. It can be designed as a refillable, stationary and permanently arranged tank in the housing 1, as an exchangeable cartridge or the like. The tank 5 is connected via a line section to a valve member 6, with the valve member 6 dosing the liquid gas for inflow into the combustion chamber 5. The tank 5 for storing liquefied gas as fuel is accommodated in the handle bridge 1b, the valve member 6, from which an injection line 7 leads to the combustion chamber 3, adjoins the tank 5. The injection line 7 opens into the combustion chamber 3 in the vicinity of a passive evaporation sheet 8.

Furthermore, an electrical energy store 9 in the form of an accumulator or a battery is provided in the handle bridge 1b. The electrical energy store 9 supplies control electronics 10, via which the valve member 6 is electrically controlled on the one hand and, on the other hand, a spark plug 11 arranged in the combustion chamber 3 is supplied electrically for generating an ignition spark. The control electronics 10 is also connected to an actuation switch 12 arranged on the grip area 1 a, so that an operator controls the process of fuel injection and one of the spark plugs 11 generated ignition sparks in the combustion chamber 3 can trigger to drive a fastener into the ground.

A pressing of the driving tool 15 against the ground is carried out by means of a Fig. 1 Pressure sensor, not shown, recognized by the control electronics, which thereby releases a defined amount of liquid gas from the tank 5 into the line 7 and injects it into the combustion chamber 3. The liquid gas strikes the evaporation plate 8, whereby the fuel jet is divided and atomized. By actuation of the actuation switch 12, combustion of the atomized and / or evaporated liquid gas is then triggered, so that strongly expanding fuel gases are produced which accelerate the piston 3a in a driving-in direction 13 onto the substrate. The driving plunger 3b finally drives the fastening element into the ground. In the meantime, the fastening element is guided in a guide element 14.

In the 2 to 4 a hand-held driving tool 20 is shown in a partial view. The driving tool 20 comprises a housing 21 and a pressure sensor 22, which can be displaced relative to the housing 21 in a driving direction 23, for pressing against a substrate, not shown. The pressure sensor 22 has a pressure end 40 for contacting the surface. The pressure sensor 22 also serves as a guide element for fastening elements, not shown, which are successively fed from a magazine 24 to a drive-in channel 22b within the pressure sensor 22, in order to be driven by a drive, not shown, which is accommodated in the housing 21, along a drive-direction 23 Driving axis 38 to be driven into the ground. The drive comprises, for example, a piston driven by internal combustion, compressed air, spring, flywheel or electrodynamically. The pressure sensor 22 is connected to the drive, for example, by means of a linkage and / or sensor (not shown) in such a way that a driving-in process is only possible when the driving-in device 20 is pressed against a surface.

The driving tool 20 also has a deflecting element 30 which closes in the driving direction 23 with a first end face 31 and a second end face 32 and also has a guide element 39 for guiding the contact pressure sensor 22. The first end face 31 and the second end face 32 protrude in the driving-in direction 23 via the housing 21 and the magazine 24. The first end face 31 has a first end face 33 which is inclined to the driving-in direction 23 by an obtuse angle α ₁ . The Angle α ₁ is approximately 140 ° in a first section 35 of the first end face 33, approximately 170 ° in a second section 36 and approximately 135 ° in a third section 37. The second end face 32 has a second end face 34 which is inclined to the driving-in direction 23 by an obtuse angle α ₂ . As in Fig. 3 is shown, the second end face 34 is inclined relative to the first end face 33 in an opposite direction and is preferably symmetrical with respect to the driving direction 23 to the first end face 33. As a result, the first end face 31 and the second end face 32 extend overall in a direction rotating with respect to the driving-in direction 23 over a rotation angle of approximately 180 °.

A projection of the first end face 31 and the second end face 32 onto a drive-in plane oriented perpendicular to the drive-in direction extends on the one hand relative to the drive-in axis 38 from an inner radius r _i of 7 mm to an outer radius r _a of 65 mm and on the other hand from a front end 41 to a rear end 42. In the entire area between the inner radius r _i and the outer radius r _a or between the front end 41 and the rear end 42, the first end face 33 and the second end face 34 are each at an obtuse angle relative to the driving direction 23 α inclined by at least 135 °. This makes it easier for the driving tool to slide off a surface or the device to be fastened. In a pressed state of the driving tool 20, the front end 41 has a distance s _v of 50 mm projected onto the driving axis 38 and the rear end has a distance s _h of 150 mm from the pressing end projected onto the driving axis 38.

In order to protect the housing 21 from damage, the deflector element 30 on the first end face 31 and / or on the second side 32 is made of a harder material than the housing 21. For example, the housing 21 is made of plastic and the deflector element 30 is made of steel. The deflector element 30 is firmly connected to the housing 21. In the case of exemplary embodiments not shown, the deflecting element is firmly connected to the pressure sensor. As in Fig. 4 is shown, the housing 21 comprises two housing parts 21a, 21b, between which the deflecting element 30 is arranged and in particular clamped.

By means of the first end face 33 or the second end face 34, the deflecting element 30 improves the sliding of the driving device 20 past parts which protrude from the ground or a device to be fastened. As a result, the driving tool 20 is pressed against the ground, particularly in confined spaces Space is easier. If the device to be fastened is, for example, a profiled sheet with protruding side walls, the side walls can under certain circumstances be spread apart by the deflecting elements, so that the driving tool can be easily pressed against the ground between the side walls.

The invention was explained using the example of a hand-held driving tool in particular. However, it is pointed out that the deflector element according to the invention can also be used for other purposes.

Claims (15)

Driving-in device comprising a housing, a drive accommodated in the housing for driving a fastening element into a subsurface, a pressure sensor which can be displaced relative to the housing in a driving-in direction for pressing against the subsurface, and a deflecting element which is connected in the driving-in direction with one over the housing protrudes end, which is inclined relative to the driving direction by an obtuse angle α. A driving tool according to claim 1, wherein a projection of the end face on a driving plane oriented perpendicular to the driving direction extends at least from an inner radius r _i to an outer radius r _a , the end face in the entire area between the inner radius r _i and the outer Radius r _{a is} inclined relative to the driving direction by an obtuse angle α greater than 125 °, in particular greater than 135 °, in particular greater than 140 °. A tacker according to claim 2, wherein the inner radius r _{i is} less than 40 mm, in particular less than 30 mm, in particular less than 25 mm. Driving tool according to one of claims 2 and 3, wherein the outer radius r _{a is} greater than 40 mm, in particular greater than 50 mm, in particular greater than 60 mm. Driving-in device according to one of the preceding claims, wherein a projection of the end face extends on a driving-in axis oriented parallel to the driving-in direction at least from a front end to a rear end, the front face in the entire area between the front end and the rear end relative to the driving direction by an obtuse angle α is inclined greater than 125 °, in particular greater than 135 °, in particular greater than 140 °. Driving-in device according to claim 5, wherein the pressing-on sensor has a pressing-on end which is pressed against the ground, and wherein in a pressed-on state of the driving-in device the front end has a distance s _v projected onto the driving-in axis of less than 100 mm, in particular less than 80 mm , in particular less than 70 mm. Driving-in device according to one of claims 5 and 6, wherein the pressing-on sensor has a pressing-on end which is pressed against the ground, and wherein the rear-end, when the driving-in device is pressed on, has a distance s _h, projected onto the driving-in axis, of greater than 100 mm, in particular, from the pressing end has greater than 120 mm, in particular greater than 130 mm. Driving tool according to one of the preceding claims, wherein the deflecting element consists at least on the end face of a harder material than the housing. Driving-in device according to one of the preceding claims, wherein the deflecting element consists at least on the end face of a material which comprises a metal and / or an alloy, in particular steel. Tacker according to one of the preceding claims, wherein the deflecting element is fixedly connected to the housing. A driving tool according to claim 10, wherein the housing comprises two housing parts, between which the deflector element is arranged, in particular clamped. A tacker according to one of claims 1 to 9, wherein the deflecting element is firmly connected to the pressure sensor. A driving tool according to one of the preceding claims, comprising a magazine for fastening elements, the deflecting element projecting over the magazine in the driving direction. Driving tool according to one of the preceding claims, wherein the end face extends in a direction rotating with respect to the driving direction over a rotation angle of at least 90 °, in particular at least 150 °, in particular at least 180 °. Driving-in device according to one of the preceding claims, wherein the end face comprises a particularly flat end face and / or a particularly straight end edge.

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