EP1997590B1 - Hand-guided setting device with connection of a positioning device - Google Patents

Description

The present invention relates to a hand-held setting tool with connection for a positioning device with tripping mediation referred to in the preamble of claim 1. Art Such a setting device is from the US Pat. No. 7,014,085 known. Such setting devices with connection for a positioning device with tripping or remote release z. B. used in overhead mounting on high ceilings, where otherwise only working with work platforms or ladders would be possible. The setting devices can, for. B. with solid, gaseous or liquid fuels or with compressed or compressed air or electrically operated.

From the US 4,479,599 a positioning and release device for a combustion-powered setting tools is known which comprises a connecting means for a setting tool, which is arranged at one end of an elongate handle in the form of a rod or a rod. The rod is axially displaceable relative to the attachment means to actuate the trigger switch of a setting device fixed to the attachment means via coupling means. To trigger the setting device on the attachment means the setting device must be attached with its mouth part to a ceiling and the user then the handle or the rod to be moved towards the ceiling. The positioning and triggering device further comprises a safety device which prevents triggering of the setting device in alignment with the mouth exactly in the direction of the gravitational force. The safety device includes for this purpose designed as a ball locking element, which is guided in a direction obliquely to the longitudinal axis of the rod and formed as a channel recess in a component in the form of the connection means. The ball rolls in an orientation in the direction of the gravitational force in the path of movement of the rod and prevents further movement of the rod relative to the carrier and thus the triggering of a carrier arranged on the setting device. For this purpose, the rod has at its end facing the attachment means a radially circumferential further recess into which the ball can engage.

The disadvantage here, however, that the release of the setting device can only be reliably prevented when the positioning and release device is aligned with the setting device exactly to the mouth in the direction of gravitational force.

From the US Pat. No. 7,014,085 is an explosion-driven setting tool with a housing, with a projecting from this elongated handle and a ball-controlled safety device known that allows the release of the setting device only in a gravitational force opposite vertical or almost vertical orientation. The ball of the ball control is arranged in an annular receiving space between the handle and the housing.

A disadvantage of this setting tool, however, is that the diameter of the ball defines the maximum, available in the release position of the ball movement path of the handle relative to the housing, within which all the necessary functions such. As the triggering of the ignition must be done. It therefore requires a high contact pressure for this short movement. It is also disadvantageous that very different angles result when raising the setting device up to the activation and lowering of the setting device until the locking of the setting device again. That is to say, the limit angle at which a setting process is still possible in the case of a deviation of the setting device from a vertical orientation opposite to that of the gravitational force may be different depending on which orientation changes the setting device has undergone prior to triggering. In addition, if the setting tool is pressed with momentum horizontally against the wall or down against the ground, the blocking ball can roll out of its blocking position and the setting device can be released unintentionally.

The object of the present invention is to develop a hand-held setting tool with connection for a positioning device with tripping mediation of the aforementioned type, which avoids the disadvantages mentioned and in which the Sicherheitsperperreinrichtung allows the triggering of a setting operation by remote triggering within a predetermined angular range and a sufficient switching stroke allows to operate the setting device at the same time with little effort.

According to the invention, the object is achieved by a hand-held setting tool with connection for a positioning device having the features of the independent claim. Accordingly, a recess for the blocking element which is open toward the component along the axis is arranged on the first axis-displaceable switching element and are furthermore provided at least three each guided in a separate channel locking elements provided. The channels are inclined relative to a plane which intersects the axis perpendicularly, wherein the channels intersect in regions an axial projection of the first switching element and are open in the overlap regions to the first switching element. The channels run to the axial projection of the switching element similar to a secant, ie they do not run on the axis of the switching element, but they cut the axial projection peripherally.

By this measure can be achieved on the one hand, that the locking position of the safety device is not only in a particular orientation of the setting device, but rotationally symmetrical to the longitudinal axis in other deviating from the approved orientation tilting plies, since then always at least one blocking element in the overlap region of a channel with the Switching element is located and thus extends into the recess. So z. B. the locking position are always triggered when the positioning device in a tilted position to the vertical (i.e., the vector of the gravitational force opposite orientation) is transferred, which exceeds a maximum allowable tilt angle.

At the same time, the maximum stroke of the switching element is not determined by the size of the blocking elements. The controlled via the Anpressweg functions such. As the triggering of the setting device or the transport of cartridges in the case of powder-driven setting tools, therefore, can be designed on the basis of the optimal force-displacement behavior. High contact forces can therefore be avoided. It may also be desired that the setting device can be triggered when the setting device is arranged with the positioning device arranged thereon in an orientation in the direction of the vector of the gravitational force and / or a tilting position to this orientation.

It is advantageous if the channels are distributed rotationally symmetrically about the axis around, so that the blocking function in each rotational position of the device around its longitudinal axis always at the same release angles allows a triggering mediation.

Advantageously, the locking elements are pin-shaped, whereby an early opening of the locking position can be prevented when the setting device is dynamically moved against a wall or a floor and the locking elements tend due to the accelerations occurring in the channels tend to move out of their blocking positions, as the pin-shaped blocking elements as opposed to spherical Locking elements are blocking effective over its entire axial length. Early opening of the blocking position is thus avoided.

It is also advantageous in terms of manufacturing technology if the switching element is rod-shaped and guided in a guide channel of the component.

Conveniently, the channels are inclined at an angle between 20 ° and 50 ° to the axis perpendicularly intersecting plane. As a result, on the one hand, a reliable unlocking is achieved inclined in a vertical orientation against the gravitational force or slightly inclined to this orientation and on the other hand, the tripping switch is reliably locked in an orientation perpendicular to the vector of gravitational force (horizontal orientation) or a dynamic pressing in the direction of gravitational force.

Advantageously, the overlapping areas of the channels for axial projection of the switching element towards the axis have a depth which is smaller than the diameter of the channels. By this measure, a sufficient guidance of the locking elements is achieved in the channels, although the channels intersect the axial projection of the switching element or the guide bore for the switching element in the manner of a secant.

It is also advantageous if the recess is formed as in both axial directions of the switching element closed, circumferential annular groove, whereby a good accessibility of the recess for the locking elements is achieved and the locking elements upon transfer of the device in a not authorized for a triggering orientation of the Device can easily engage from the channels into the recess blocking effective.

It is also favorable if the groove walls bounding the recess in the axial direction run obliquely with respect to the axis, so that the axial width of the recess decreases from radially outward to radially inward. This results in pin-shaped blocking elements in the blocking position not only a point but a line contact between the lateral surface of the locking pins and the oblique groove walls of the switching element. The surface pressure in the contact area can thus be reduced.

In the drawings, the invention is shown in one embodiment.

Fig. 1

in teilweise explodierter Darstellung ein erfindungsgemässes handgeführtes Setzgerät mit Positioniervorrichtung in nicht angepresster Stellung,

Fig. 2

ein vergrössertes Detail des erfindungsgemässen Setzgerätes gemäss Ausschnitt II aus Fig. 1 in einem Längsschnitt parallel zur Längsachse in einer der Gravitationskraft entgegengesetzten, vertikalen Orientierung der Mündung des Setzgerätes in unbetätigter Stellung und mit angedeuteter betätigter Stellung,

Fig. 3

das Detail des Setzgerätes aus Fig. 2 in unbetätigter Stellung in einem mittigen Längsschnitt,

Fig. 4

das Detail des Setzgerätes aus Fig. 2 in unbetätigter Stellung in einem Längsschnitt parallel zur Längsachse in einer vertikalen Orientierung mit in Richtung der Gravitationskraft ausgerichteter Mündung des Setzgerätes,

Fig. 5

das Detail des Setzgerätes aus Fig. 4 in unbetätigter Stellung in perspektivischer Ansicht.

Show it:

Fig. 1

in a partially exploded view of an inventive hand-held setting tool with positioning in unpressed position,

Fig. 2

an enlarged detail of the inventive setting device according to section II Fig. 1 in a longitudinal section parallel to the longitudinal axis in a gravitational force opposite, vertical orientation of the mouth of the setting tool in the unactuated position and with an actuated actuated position,

Fig. 3

the detail of the setting tool Fig. 2 in the unactuated position in a central longitudinal section,

Fig. 4

the detail of the setting tool Fig. 2 in the unactuated position in a longitudinal section parallel to the longitudinal axis in a vertical orientation with in the direction of the gravitational force aligned mouth of the setting tool,

Fig. 5

the detail of the setting tool Fig. 4 in unactuated position in perspective view.

In the FIGS. 1 to 5 an inventive hand-held setting tool 10 and a positioning device 20 is shown with tripping mediation for setting tool 10, which is for example modular. Such positioning devices 20 are used to extend setting devices to z. B. work overhead on ceilings etc. with the setting tool to perform.

The positioning device 20 according to FIG. 1 a rod-like handle 21, which is connectable via a coupling element 28 with a counter-coupling element 18 at the terminal 16 of the setting tool 10. The connection between the coupling element 28 and the counter-coupling element 18 is detachable, so that the positioning device 20 and the setting tool 10 can be assembled and disassembled again. The connection between setting tool 10 and positioning device 20 on the coupling element 28 and mating coupling element 18 may, for. B. be designed as a screw or bayonet connection.

In addition to the in Fig. 1 shown handle 21 can still be provided one or more extension parts, between the handle 21 and the setting tool can be used and each having at one end a coupling element and at another end a counter-coupling element.

The longitudinal extent of the rod-like handle 21 and the longitudinal extension of the setting tool 10 define an axis A.

This in Fig. 1 reproduced setting device 10 has a arranged in a single or multi-part housing 11 setting network for driving fasteners into a structural element. To initiate a setting process, a triggering element 13 designed as a trigger switch is arranged on the setting device 10 on a handle 12 of the setting device 10. On the setting tool 10, the housing 11 at its end facing away from the terminal 16 upstream a total of 14 designated mouth part is arranged, which is displaceable relative to the housing 11. When pressing the setting device 10 with the mouth part 14 to a workpiece (not shown in the figures), the setting device 10 is transferred to a setting ready state in which a setting process can be triggered by the trigger element 13. The setting device also has a switching strand, designated overall by 30, which can be brought into operative connection at the connection 16 with remote release means 40 of the positioning device 20.

The remote release means 40 of the positioning device 20 and the switching strand 30 on setting tool 10 serve the triggering mediation of an actuating element 24 of the rod-like handle 21 to the trigger element 13 of the setting tool 10. The actuator 24 acts as a remote trigger switch.

The actuating element 24 designed as an elongate actuating sleeve is guided on a supporting element 23, designed as a hollow rod, of a supporting structure. As an alternative to an actuating sleeve and an operating lever could be used, the z. B. on a handle portion on a coupling element 28 remote from the end of the handle 21 is arranged.

The actuating element 24 is displaceable parallel to the axis A relative to the support element 23. On a coupling element 28 facing away from the free end 25 of the support member 23 and the handle 21, a foot part 26 is arranged, which projects beyond a coupling element 28 remote from the axial end 27 of the actuating element 24. The support element 23 is fixedly connected to the coupling element 28, which has a receptacle 48 for the counter-coupling element 18 at its end remote from the support element 23. At one of the foot part 26 facing the end of the coupling element 28 is a Abstützstelle 45 formed for a spring element 42 which is supported with its other end of the spring via an intermediate member 43 formed as an inner sleeve on the actuating element 24 and this in the direction of his Fig. 1 apparent starting position applied elastically. The intermediate element 43 is fixedly connected to the actuating element 24.

The actuating element 24 is fixedly connected to a sleeve-shaped first switching element 41 of the remote release means 40, which at least partially surrounds a portion 46 of the coupling element 28 fixed to the support element 23. The first switching member 41 cooperates with a second switching member 49 which is guided in a trained as a blind hole guide 44 in the coupling element 28 slidably. The first switching element 41 is connected via a perpendicular to the axis A extending and designed as a pin connecting means 47 to the second switching element 49. The connecting means 47 engages to slot-shaped openings (not visible in the figures) in the section 46 of the coupling element 28, which allow a displacement of the connecting means 47 relative to the coupling element 28 and parallel to the axis A.

After coupling to the setting tool 10, the second switching element 49 of the remote release means 40 cooperates with a trained as a pin first switching element 34 of the switching strand 30 of the setting device 10 so that a switching movement of the remote release means 40 in at least one direction along the axis A to the switching strand 30th is transferable.

The switching strand 30 of the setting tool 10, in addition to the first switching element 34 which is movable along the axis A, also designed as a pivot lever second switching element 35, which cooperates via a formed on a first lever arm cam 36 with the first switching element 34 and at the second lever arm, a third switching element 38 is coupled. The third switching element 38 is designed as a shift rod and is connected to a driver 37 of the latching string 30, which cooperates with the triggering element 13 of the setting device 10. About a not visible in the figures spring means of the shift chain 30 with the driver 37 in the direction of his off Fig. 1 apparent unactuated position applied, in which the driver 37 does not press against the trigger element 13 of the setting device 10.

The setting device 10 furthermore has a safety device designated as a whole by 50 (cf. FIGS. 2 to 5 ), which triggering the on the positioning device 20th arranged setting device 10 via the control section 30 or by remote release via the actuator 24 of the positioning device 20 in a direction other than the permitted prevented. This safety device 50 is between a component 33 of the guide structure for the switching strand 30, which forms the leadership of the first switching element 34 at the terminal 16 in the illustrated embodiment, and relative to this axially displaceable along the axis A switching element of the switching string 30, in the illustrated embodiment is formed by the first switching element 34 is arranged. The safety device 50 has a recess 51 formed as a radially circumferential annular groove on the outside of the first switching element 34. The recess 51 is open to the component 33 or radially outward. The recess 51 is bounded in the axial direction by groove walls 52 which extend obliquely with respect to the axis A, so that the axial width of the recess 51 decreases from radially outward to radially inward.

The safety device 50 also has a plurality of, in the illustrated example exactly three, channels 56 in the component 33, which are distributed rotationally symmetrically about the axis A around (see in particular Fig. 5 ) and which are inclined with respect to a perpendicular to the axis A intersecting plane E at an angle alpha of 20 ° to 50 ° (see, in particular Figures 2 and 4 ). The channels 56 have a circular cross-section perpendicular to their longitudinal extent. A radially outer end 58 of the channels 56 is open on the lateral surface of the component 33, while a radially inner end 57 of the channels 56 is closed. Radially outside the openings of the channels 56 are closed at its radially outer end via the housing 11 (see Figures 2 and 4 ). The channels 56 cut in the manner of a secant partially regional an axial projection (or the guide channel) of the first switching element 34 and are open in these overlapping regions 59 to the first switching element 34. The length L2 of the channels 56 from the radially outer end 58 to the overlap region 59 is in each case greater than the length L1 of the channels 56 from the inner end 57 to the overlap region 59 (see FIG Fig. 2 ). The intersection regions 59 of the channels 56 and the axial projection of the first switching element 34 also have a depth T towards the axis A which is smaller than the diameter D of the channels 56 (see in particular FIG Fig. 3 ). In each of the channels 56 each designed as an elongated, circular cylindrical pin locking element 55a, 55b, 55c is movably guided. The length L1 of the channels 56 from the inner end 57 to the overlap region 59 is smaller than the length L3 of the pin-shaped blocking elements 55a, 55b, 55c (see FIG. Fig. 2 ). Further, the length L4 of the intersecting portions 59 in the longitudinal direction of the channels 56 is smaller than the length L3 of the pin-shaped blocking elements 55a, 55b, 55c.

In the from the FIGS. 1 to 3 apparent starting position of the setting device 10 and the positioning device 20 is aligned with the mouth portion 14 of the setting device 10 opposite to the direction of the vector G of gravitational force (eg, in the direction of a ceiling). The actuating element 24 and thus the remote release means 40 of the positioning device are unconfirmed, wherein the actuating element 24 is displaced over the spring element 42 maximally far into the cup-shaped foot part 26 inside. The first switching element 34 of the switching strand 30 of the setting device 10 is therefore also maximum retracted into the guide channel in the component 33 (see. Fig. 1 ). The second switching element 35 and the rest in the stroke direction of the switching strand 30 with the driver 37 are not actuated (see, in particular Fig. 2 ).

In the Figures 2 and 3 is the area of the setting device 10 with the safety device 50 in the off Fig. 1 apparent orientation to the vector G of the gravitational force magnified reproduced. As can be seen, the pin-shaped blocking element 55a is located radially outward in the channel 56 in its radially outer end 58 facing region and is thus not blocking effective in the overlap region 59 between the portion 46 and the first switching element 34. The other locking elements 55b and 55c (FIG the blocking element 55c in Fig. 2 is outside the cutting plane and therefore is not visible there) are in the radially outer end 58 facing areas of the channels 56 and thus are also not blocking effective. The safety device 50 is in this orientation of the setting device 10 and the positioning device 20 in its triggering switching position. The setting device 10 on the positioning device 20 can be pressed in this orientation with the mouth part 14 to a ceiling or other workpiece and it can then be triggered by a displacement of the actuating element 24 to the coupling element 28 toward a setting process, since the locking elements 55a, 55b, 55c allow a relative movement of the first switching element 34 relative to the device 33 due to its fully engaged in the first recess 51 position. How out Fig. 2 it can be seen, the first switching element 34 is thereby via the second switching element 49 (only in Fig. 1 reproduced) in the direction of the first arrow 15 or on the mouth part 14 towards the counter coupling element 18 axially offset (dashed lines shown first switching element 34 in Fig. 2 ). About the cam 36 on the second switching element 35 and the subsequent part of the switching string 30 is actuated up to the driver 37 for the trigger element 13 (in the Fig. 2 and 3 not shown), so that the setting device 10 is triggered in this orientation to the vector G of gravitational force.

Even with a tendency of the setting tool 10 to the in the FIGS. 1 to 3 shown alignment of max. about 25 ° to 50 °, a triggering mediation is still possible, since the pin-shaped locking elements 55a, 55b, 55c still remain in the radially outward ends 58 facing areas of the channels 56. If a pin-shaped blocking element 55a, 55b, 55c is still partially, ie with one end, in the overlapping region 59, although the safety device 50 is actually in a position corresponding to its release position, then it can be pressed over the groove walls running obliquely to the axis A. 52 are pressed out of the recess 51 out into the release position.

In the FIGS. 4 and 5 is the setting tool 10 (and in the Fig. 4 and 5 not shown positioning device 20) with the safety device 50 with his off Fig. 1 apparent mouth portion 14 by way of example aligned in the direction of the vector G of the gravitational force. As can be seen, all the pin-shaped blocking elements 55a, 55b, 55c are located in the region of the channels 56 facing the radially inner end 57 and thus due to the ratios of the lengths L3 of the pin-shaped blocking elements 55a, 55b, 55c to the lengths L1 of the radial inner ends 57 to the overlap regions 59 at least partially blocking effective in the overlapping regions 59. The safety device 50 is in this orientation, ie in its blocking position. If the setting tool 10 is pressed on the positioning device 20 in this orientation with the mouth part 14 to a structural element, then by moving the actuating element 24 to the coupling element 28 out (see. Fig. 1 ) A setting process can not be triggered, since the pin-shaped locking elements 55a, 55b, 55c allow in the blocking position relative movement of the first switching element 34 relative to the component 33 due to their engagement in the recess 51 only for a very short path, the shorter is considered the required switching stroke.

In a horizontal orientation not shown in the figures (ie perpendicular to the vector G of the gravitational force) of the setting device 10, at least one of the pin-shaped blocking elements 55a, 55b, 55c is in the blocking position and thus prevents relative movement of the first switching element 34 relative to Component 33.

In a construction variant of the channels 56, not shown in the drawings, these can be conically widened at their radially inner ends 57, whereby the center axes of the pin-shaped blocking elements 55a, 55b, 55c can be inclined to the central axis of the respective channel 56. As a result, z. B. in a dynamic pressing of the positioning device 10 with the setting tool in the direction of the vector G of the gravitational force or extends perpendicular to this the blocking time in which at least one pin-shaped blocking element 55a, 55b, 55c at least partially blocking effective in the overlap region 59, since the pin-shaped locking element 55a, 55b, 55c must first align with the central axis of the channel 56 before it from the Overlap area 59 can disengage.

Claims (8)

1. Hand-held setting device with a connection for a positioning device and having a trigger element for a setting procedure, wherein the connection (16) comprises a counter-coupling element (18) for the positioning device (20) and a mechanical switching train (30) having at least one first switch element (34) which is displaceable in a component (33) along an axis (A) for the trigger-relaying from an actuating element of the positioning device to the trigger element (13), and comprising a safety device (50) for orientation-dependent blocking of the trigger-relaying, having a blocking element (55a, 55b, 55c) which is movably guided in a channel (56), wherein a recess (51) for the blocking element (55a, 55b, 55c), said recess being open toward the component (33), is arranged on the first switch element (34), characterised in that at least three blocking elements (55a, 55b, 55c) are provided, each guided in a separate channel (56), wherein the channels (56) are inclined relative to a plane (E) vertically intersecting the axis (A) and wherein the channels (56) partially intersect an axial projection of the first switch element (34) and, in the overlap regions (59) are open toward the first switch element (34) and wherein the channels (56) extend in the manner of a secant to the axial projection of the switch element (34).
2. Setting device according to claim 1, characterised in that the channels (56) are distributed in rotationally symmetrical manner round the axis (A).
3. Setting device according to claim 1 or 2, characterised in that the blocking elements (55a, 55b, 55c) are configured pin-shaped.
4. Setting device according to claim 1, characterised in that the first switch element (34) is configured rod-shaped and is guided in a guide channel of the component (33) .
5. Setting device according to claim 1, characterised in that the channels are inclined at an angle (alpha) in the range of 20° to 50° to the plane (E).
6. Setting device according to claim 1 or 5, characterised in that the overlap regions (59) of the channels (56) have a depth (T) to the axial projection of the first switch element (34) toward the axis (A) which is smaller than the diameter (D) of the channels (56).
7. Setting device according to claim 1 or 4, characterised in that the recess (51) is configured as a circumferential annular groove which is closed in both axial directions of the first switch element (34).
8. Setting device according to claim 1 or 7, characterised in that the groove walls (52) delimiting the recess (51) in the axial direction extend obliquely in relation to the axis (A), so that the axial width of the recess (51) decreases from radially outwardly to radially inwardly.

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