EP4463289A1 - Bolzensetzgerät zum eintreiben eines befestigungselements in einen untergrund - Google Patents
Bolzensetzgerät zum eintreiben eines befestigungselements in einen untergrundInfo
- Publication number
- EP4463289A1 EP4463289A1 EP23700409.8A EP23700409A EP4463289A1 EP 4463289 A1 EP4463289 A1 EP 4463289A1 EP 23700409 A EP23700409 A EP 23700409A EP 4463289 A1 EP4463289 A1 EP 4463289A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- buffer element
- socket
- bolt
- buffer
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
- B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
- B25C1/14—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil
Definitions
- the invention relates to a bolt-firing tool for driving a fastener into a substrate, having the features of the preamble of claim 1.
- the bolt-firing tool is in particular a bolt-driving tool.
- the fastening element is a nail, for example.
- the substrate is, for example, a wooden substructure on a ceiling or a wall or a component made of concrete or steel.
- European Patent EP 2 402 119 B1 discloses a bolt driver having a piston for driving a nail into a substrate and a two-piece annular shock absorber for braking the piston at one end of a piston travel.
- the shock absorber has a ring-shaped stop element made of steel for the piston and a buffer element made of an elastomer, which is also ring-shaped.
- the object of the invention is to propose a bolt-firing tool with an alternative shock absorber.
- a bolt-firing tool having the features of claim 1 .
- the bolt-firing tool according to the invention is intended for driving a fastening element such as a nail into a substrate made of wood, concrete or steel, for example.
- the bolt-firing tool has a piston, which can be moved along a piston axis to drive in the fastening element and can be accelerated forwards in a driving-in direction by means of an energy store, for example a helical spring.
- the fastening element is or will be arranged in particular coaxially with the piston axis in such a way that the forward-moving piston hits the fastening element, at least partially transfers its kinetic energy to the fastening element and drives the fastening element into the substrate.
- Force means movement of the piston toward the fastener or in terms of driving the fastener into the ground.
- a “piston” within the meaning of the invention is generally understood to be a component of the bolt-firing tool that can be moved along the piston axis and accelerated forwards in the driving direction for driving in the fastener by means of the energy storage device, such that it transfers at least part of its kinetic energy to the Fastener transmits when it hits the fastener.
- the bolt-firing tool according to the invention has a multi-part shock absorber that limits the piston travel in the driving direction.
- a stop surface of the piston does not necessarily come into contact with the shock absorber, rather the fastening element can brake the piston to a standstill before the piston strikes the shock absorber with the stop surface.
- the stop surface abuts the shock absorber particularly when no fastener is present or when the piston is driving or generally moving the fastener enough to cause the stop surface to butt against the shock absorber.
- the abutment surface is located at a rear portion of the piston, while the front portion is configured to impact the fastener.
- the shock absorber has two buffer elements made of elastic plastics, which are arranged axially one behind the other, and a socket, which is arranged between the two buffer elements.
- “Axial” or “axially one behind the other” means in relation to the piston axis.
- "Between” means that the socket is at least partially located between the two buffer elements in the direction of the piston axis.
- the socket can completely separate the two buffer elements from one another in such a way that an axial force is transmitted between the two buffer elements exclusively via the socket.
- the two buffer elements - at least when the shock absorber is axially compressed - touch each other.
- the socket consists of a material that is harder than the material of the two buffer elements.
- the frame consists of a plastic and preferably of a fiber-reinforced plastic, in particular of a Glass fiber reinforced polyamide, while the two buffer elements are made of elastomers of different hardness.
- the socket completely or at least partially encloses a second of the two buffer elements on its circumference in such a way that the socket limits or prevents an elastic, radial expansion of the second buffer element when the second buffer element is compressed axially.
- the mount increases the resistance of the second buffer element to mechanical stress from the piston when the piston has been accelerated in the driving direction for driving the fastener into the ground and at the end of the piston travel hits the shock absorber or bumps against the shock absorber.
- the two buffer elements are arranged axially one behind the other, with the second buffer element in particular being arranged behind the first buffer element.
- the second buffer element thus faces the stop surface of the piston and the stop surface comes into direct contact with the second buffer element in particular for braking.
- a further development of the invention provides for an annular or tubular, in particular hollow-cylindrical collar on a side of the socket facing the second buffer element, which collar at least partially, in particular completely, encloses the second buffer element on the circumference and from which the second buffer element protrudes axially at least when the second Buffer element is undeformed.
- the collar forms the part of the mount that limits or prevents the elastic, radial expansion of the second buffer element during axial compression.
- the second buffer element When the piston hits the shock absorber, the second buffer element can be axially compressed to such an extent that the piston presses against an end edge of the socket or the end edge of the socket against, for example, an abutment in a housing of the bolt-firing tool abuts, the collar acting as a stop of the socket, which limits the axial compression of the second buffer element.
- the collar preferably has an axial height that is greater than a third, in particular greater than half, of the axial height of the second buffer element when the buffer element is not axially compressed, i.e. undeformed, i.e. when the piston is in a basic position located before driving in.
- the socket is preferably designed in such a way that the second buffer element can be completely accommodated in the socket in the deformed state when the piston upsets the second buffer element when being driven in at the end of the piston travel.
- the socket is designed in such a way that the piston then rests against the collar, in particular with the stop surface.
- the mount in particular the collar of the mount, can have a corresponding axial height, so that the mount has a sufficiently large capacity for holding the second buffer element in the deformed state.
- the two buffer elements can consist of the same material or have identical elasticity.
- the elasticity of the second buffer element is preferably smaller than the elasticity of a first of the two buffer elements.
- the second buffer element is therefore less elastic, ie less deformable, than the first buffer element, which is more easily deformable. This means that the second buffer element deforms less than the first buffer element under the same load.
- a preferred embodiment of the invention provides that the socket has an inclined surface on the side of the first buffer element which faces the piston axis and which acts on the first buffer element radially inwards when an axial compressive force is transmitted between the socket and the first buffer element.
- the force exerted on the first buffer element radially inward by the inclined surface of the socket when the first buffer element is axially compressed counteracts a radial expansion of the first buffer element due to the axial compression.
- the sloping surface is in particular of conical design, specifically a hollow truncated cone surface or inner truncated cone surface enclosing the piston axis.
- the first buffer element is conical on its side facing the socket and the inclined surface of the socket, with the conical surface of the Buffer element belonging cone angle deviates from the cone angle of the mount.
- the cone angle of the socket is greater than that of the buffer element, in particular by at least 5°, in particular by at least 10°, in particular by at least 15°.
- the cone angle is the angle enclosed between the respective cone surface and the piston axis.
- stiffening ribs on an outer circumference of the collar of the socket stiffen the collar against radial widening or bending up.
- an undercut in the socket in which the second buffer element rests or into which the second buffer element engages holds the second buffer element in place or in the socket.
- the “undercut” is an indentation on an inner peripheral surface of the frame that runs all the way around or is present only in one or more places.
- one embodiment of the invention provides that at least one of the two buffer elements is snapped onto the socket.
- One embodiment of the invention provides a perforated disk as part of the socket between the two buffer elements, through the center hole of which the piston axis passes—preferably concentrically.
- An embodiment of the invention provides that the first buffer element is higher in the axial direction than the second buffer element.
- the first buffer element thus has a greater extent in the axial direction, ie a greater height, than the second buffer element.
- the first buffer element is, in particular, sleeve-shaped, while the second buffer element is, in particular, ring-shaped.
- “Sleeve-shaped” means that the buffer element is at least about half its axial height at its largest or mean outside diameter, while “annular” means that the buffer element is at most about half its axial height at its largest or mean outside diameter.
- One embodiment of the invention provides the first buffer element with two truncated cone surfaces on its outer circumference.
- the two truncated cone lateral surfaces which can directly adjoin one another, have different cone angles, with at least one of the cone angles deviating from the cone angle of the socket, in particular being smaller.
- the two cone angles of the buffer element taper axially in the same direction, namely in the direction of the inclined surface of the socket.
- the sloping surface of the socket acts upon the first buffer element radially inwards on one of its two truncated cone surfaces during axial compression.
- the design of the first buffer element with the two truncated cone lateral surfaces tapering axially in the same direction has proven to be favorable in terms of damping the movement of the piston and in terms of a mechanical load-bearing capacity of the first buffer element.
- the first buffer element is arranged in a receptacle, in particular in the bolt-firing tool or in a housing of the bolt-firing tool.
- the receptacle encloses the circumference of the first buffer element in such a way that the receptacle limits or prevents an elastic, radial expansion of the first buffer element when the first buffer element is compressed axially.
- the receptacle supports the first buffer element radially from the outside and stabilizes the first buffer element and increases its mechanical resilience.
- Figure 1 is a simplified and schematic axial section of a
- Figure 2 shows an axial section of a shock absorber according to the invention
- Figure 3 is a perspective view of a socket of the shock absorber from Figure 2.
- the bolt-firing tool 1 according to the invention shown in FIG. 1 is used to drive a fastening element 2, for example a nail, into a substrate (not shown), for example made of wood.
- the bolt-firing tool 1 has a piston 3 which is guided in a housing 4 of the bolt-firing tool 1 so as to be movable, namely axially displaceable, along a piston axis 5 .
- the piston 3 has a hollow cylinder 26 which is sealed and guided in a cylinder chamber 6 in the housing 4 so that it can be moved axially.
- Hollow cylinder 26 and cylinder chamber 6 together form a gas pressure spring as an energy store.
- the piston 3 can be accelerated axially forward in a driving direction.
- an alternative spring for example a helical compression spring.
- the bolt-firing tool 1 requires no cylinder space 6 and no hollow cylinder 26 as a gas pressure spring.
- the driving direction is the direction in which the piston 3 approaches the fastener 2 and the direction in which the fastener 2 is driven into the ground.
- the piston 3 has a coaxial plunger 25 which abuts against a head 7 of the fastener 2 when the piston 3 moves forward in the driving direction.
- the ram 25 is thus located at the front of the piston 3 and in front of the hollow cylinder 26.
- the fastener 2 is held coaxially at its head 7 in a holder 8 of the bolt-firing tool 1 and is driven out of the holder 8 axially by the ram 25 of the piston 3 when the plunger 25 hits the head 7, which is shown in FIG.
- the piston 3 can generally be understood as a component of the bolt-firing tool 1 that can be moved in the direction of the piston axis 5 in order to drive the fastening element 2 into the ground.
- the bolt-firing tool 1 has a shock absorber 9--in three parts in the exemplary embodiment--which is tubular and coaxial with the piston axis 5 in the housing 4 of the bolt-firing tool 1 according to the invention.
- the plunger 25 of the piston 3 passes through the shock absorber 9.
- the piston 3 has a - in the exemplary embodiment, a ring-stepped and coaxial stop surface 10 in a radial plane, which is arranged in the bolt driver behind the shock absorber 9 and faces it and from which the plunger 25 axially in the direction of the fastener 2 or in the direction of the elastic mount 8 for the head 7 of the fastener 2 protrudes.
- the fastening element 2 does not brake the piston 3 to a standstill on its ram 25 before the stop surface 10 reaches the shock absorber 9, the piston 3 strikes with its stop surface 10 at the end of its movement in the driving direction forwards against the Shock absorber 9 and is decelerated by this to a standstill.
- the shock absorber 9 limits the movement of the piston 3 in the driving direction.
- the socket 13 consists of glass fiber reinforced nylon, i.e. a plastic that is harder than the two buffer elements 11, 12.
- the invention is not limited to the specified materials for the two buffer elements 11 , 12 and the socket 13 .
- the second buffer element 12 is in the form of a ring, the ring cross-section of which is rounded on an inner circumference in the shape of a circular arc, which on a side facing the perforated disk 14 of the socket 13 has a circumferential, rectangular edge rounded in the manner of a chamfer on an outer circumference and a circumferential, channel-shaped edge rounded recess on one of the stop surface 10 of the piston 3 facing side of the outer circumference (compare Figure 2).
- the socket 13 which is shown as an individual part in FIG.
- the second buffer element 12 is arranged in the collar 15 of the socket 13 and is supported axially on the perforated disk 14 of the socket 13 .
- the axial height of the collar 15 is greater than half the axial height of the second buffer element 12 in the non-deformed state, as shown in FIG.
- the collar 15 is axially lower than the second buffer element 12 is high, such that the second buffer element 12 protrudes axially in the direction of the stop surface 10 of the piston 3 from the collar 15 when the second buffer element 12 is undeformed, in particular not axially compressed.
- the collar 15 On its inner circumference, the collar 15 has a radially low, circumferential undercut 16 in which the annular second buffer element 12 rests.
- the second buffer element 12 is snapped into the undercut 16 in the collar 15 of the mount 13 and is thereby held axially on the mount 13 .
- the first buffer member 11 has a coaxial through hole 17 .
- the first buffer element 11 is conical, having two truncated cone surfaces 18, 19 axially adjacent to one another, both of which taper in the direction of the perforated disk 14 of the mount 13 and a cone angle of the second truncated cone surface 19 closer to the perforated disk 14 is more obtuse.
- the socket 13 has a coaxial, truncated cone-shaped skirt 20 on an outer circumference of its perforated disk 14 on a side opposite the collar 15 or the first buffer element 11 .
- the skirt 20 has the same cone angle as the second truncated cone surface 19 of the first buffer element 11 that is close to it, although this is not mandatory for the invention.
- the housing 4 of the bolt-firing device 1 according to the invention has a receptacle 21, which is coaxial with the piston axis 5, for the first buffer element 11 of the shock absorber
- the receptacle 21 has the shape of a cylindrical countersink with a circumferential undercut 22 .
- the first buffer element 11 of the shock absorber 9 and the skirt 20 of the socket 13 of the shock absorber 9 are located in the seat 21 in the housing 4, with an outer peripheral edge of the skirt 20 engaging behind the undercut 22 of the seat 21 in such a way that the socket 13 extends over its skirt 20 is retained in the receptacle 21, with the skirt 20 retaining the first buffer member 11 in the receptacle 21.
- the socket 13 has stiffening ribs 23 arranged in radial planes on the outside of the collar 15, which are supported on the perforated disk 14 of the socket 13 projecting radially outward beyond the collar 15 and which support the collar 15 against radial expansion and bending.
- the stop surface 10 abuts first against the second buffer element 12, which protrudes axially in the direction of the stop surface 10 of the piston 3 from the collar 15 of the socket 13 surrounding the second buffer element 11.
- the piston 3 with its stop surface 10 elastically compresses the second buffer element 12 axially at most until the stop surface 10 abuts against an end edge of the collar 15 facing it.
- the collar 15 surrounding the second buffer element 12 prevents or at least limits a radial elastic widening of the second buffer element 12 when the second buffer element 12 is axially elastically compressed.
- the collar 15 thereby prevents the second buffer element 12 from being overstressed and damaged or destroyed by mechanical stress which the stop surface 10 of the piston 3 exerts on the second buffer element 12 when the piston 3 strikes the second buffer element 12 with its stop surface 10.
- the second buffer element 12 accelerates the socket 13 in the driving-in direction when the piston 3 strikes the second buffer element 12 with its stop surface 10 during its movement in the driving-in direction.
- the socket 13 compresses the first buffer element 11 elastically when it is acted upon by the piston 3 via the second buffer element 12 in the driving direction against the first buffer element 11 .
- the receptacle 21 in the housing 4 of the bolt-firing device 1 according to the invention limits or prevents an elastic, radial expansion of the first buffer element 11, thereby reducing mechanical stress on the first buffer element 11 and preventing damage or destruction of the first buffer element 11.
- An inner surface of the truncated cone-shaped skirt 20 of the socket 13 forms an inclined surface 24 facing the piston axis 5, which acts on the first buffer element 11 on its truncated cone surface 19 radially inwards and thereby counteracts a radial expansion of the first buffer element 11 in the event of an axial compression of the first buffer element 11.
- the inclined surface 24 is conical and has a cone angle, which is 20 ° larger in the embodiment, than the cone angle of the first truncated cone surface 18. This also contributes to the fact that the first buffer element 11 in its elastic, axial compression not by a radial Expansion is damaged or destroyed.
- the fastener 2 brakes the piston 3, causing a mechanical stress on the both buffer elements 11, 12 and the version 13 of the shock absorber 9 is reduced by the axial compression by the piston 3. It is also possible for the fastening element 2 to brake the piston 3 to a standstill before the stop surface 10 of the piston 3 strikes the front edge of the collar 15 of the mount 13 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022100780 | 2022-01-14 | ||
| DE102022129973.2A DE102022129973A1 (de) | 2022-01-14 | 2022-11-14 | Bolzensetzgerät zum Eintreiben eines Befestigungselements in einen Untergrund |
| PCT/EP2023/050094 WO2023135041A1 (de) | 2022-01-14 | 2023-01-04 | Bolzensetzgerät zum eintreiben eines befestigungselements in einen untergrund |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4463289A1 true EP4463289A1 (de) | 2024-11-20 |
Family
ID=84981968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23700409.8A Withdrawn EP4463289A1 (de) | 2022-01-14 | 2023-01-04 | Bolzensetzgerät zum eintreiben eines befestigungselements in einen untergrund |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4463289A1 (de) |
| WO (1) | WO2023135041A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2339163C2 (de) * | 1973-08-02 | 1975-01-30 | Karl M. Reich, Maschinenfabrik Gmbh, 7440 Nuertingen | Schlagpuffer für Einschlaggeräte |
| DE19509763A1 (de) * | 1995-03-17 | 1996-09-19 | Adolf Wuerth Gmbh & Co Kg | Bolzensetzgerät |
| US5617925A (en) * | 1995-06-05 | 1997-04-08 | Sencorp | Assembly for decelerating a driver in a tool |
| DE19638341A1 (de) * | 1996-09-19 | 1998-03-26 | Adolf Wuerth Gmbh & Co Kg | Bolzenschubgerät und Feder dafür |
| DE19722795A1 (de) * | 1997-05-30 | 1998-12-03 | Hilti Ag | Setzgerät |
| DE102010030127A1 (de) | 2010-06-15 | 2011-12-15 | Hilti Aktiengesellschaft | Eintreibvorrichtung |
-
2023
- 2023-01-04 WO PCT/EP2023/050094 patent/WO2023135041A1/de not_active Ceased
- 2023-01-04 EP EP23700409.8A patent/EP4463289A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023135041A1 (de) | 2023-07-20 |
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