EP3560661A1 - Hand-held machine tool and arrangement for a hand-held machine tool - Google Patents

Abstract

The arrangement (7) according to the invention comprises a side handle (8) for a hand tool (1) and an eyelet device (9) having an eyelet portion (10) adapted to be connected to a safety belt (11) and a fastener (12) adapted to be attached to the side handle.

Description

FIELD OF THE INVENTION

The present invention relates to an arrangement for a hand tool and a hand tool.

Hand tool machines can be designed, for example, as battery-operated hand tool machines. Furthermore, a hand tool machine may comprise a main handle, which is arranged at the rear, and a side handle, which is arranged at the front. The side handle is usually rotatably attached to the power tool. In this case, the hand tool machine may comprise a locking means for locking the side handle.

Such hand tool machines can also be used at certain heights, for example on tall buildings or scaffolding. To avoid dropping a hand tool and thereby causing personal injury, it may be a requirement to attach the hand tool to a person or object using a safety belt. For example, the hand tool machine may comprise an eyelet device to which the safety belt can be fastened.

For example, the shows EP 2 678 137 B1 an eyelet device attached to the main handle.

An object of the present invention is to provide an improved arrangement for a hand tool.

DISCLOSURE OF THE INVENTION

Accordingly, an arrangement with a side handle for a hand tool and an eyelet device is proposed. The eyelet device has an eyelet portion adapted to be connected to a safety belt, and a Attachment means adapted to be attached to the side handle.

By the eyelet device can be fastened by means of the fastening means on the side handle, the seat belt can be ergonomically connected to the side handle and thus the hand tool. The eyelet device is close to the hand and in the field of vision of an operator who operates the hand tool. Furthermore, it can be avoided in particular that the eyelet device is attached to a housing of the power tool. Therefore, the seat belt does not disturb the operator. In addition, there is the advantage that the housing does not need to be redesigned and resized and that other functionalities of the housing are not compromised. Furthermore, the eyelet device, for example, to existing side handles of hand tool machines, which were not provided in advance for this application, are attached. In particular, so that an existing side handle can be retrofitted in a simple manner.

Preferably, the attachment means of the eyelet device is connected to a further attachment means included in the side handle. The further fastening means is in particular an existing fastening means of the side handle, which was not provided in advance for this application. Furthermore, it is advantageous that a standard tool can be provided with the eyelet device, which fits a large number of hand tool machines, in particular with the same side handle.

The hand tool is, for example, a hammer drill, a chisel hammer, a core drill, a grinding machine, a screwdriver, a bolt pushing tool or a saw. Preferably, the hand tool machine comprises a motor for setting a release means (such as a drill or saw blade) in rotation. Preferably, the hand tool machine further comprises a fastening device, which is adapted to fix the separating means to the hand tool. The fastening device is for example a drill chuck. Preferably, the hand tool machine comprises a replaceable battery (accumulator), which is adapted to supply the motor with electrical energy. The hand tool machine preferably comprises a main handle, which is arranged at the rear, and the side handle, which is arranged in the front, ie in the vicinity of the chuck (drill chuck side). In particular, the side handle may also be referred to as the front handle and the main handle as the rear handle.

Preferably, the eyelet portion comprises a closed ring portion with an opening. "Seat belt" herein means an elongated and flexible fastener, such as a rope, a chain, a belt or a belt. Furthermore, the safety belt can be comprised by the arrangement and optionally connected to the eyelet portion. For example, the seat belt may include a fastener, such as a snap hook, configured to releasably connect the seat belt to the ear portion. Furthermore, the seat belt may comprise a further fastening element. The further fastening element is, for example, to a garment or a supporting structure, for. B. to a railing or to a wall section, attachable.

Preferably, the attachment means and the further attachment means are adapted to be releasably secured to each other. This has the advantage that the side handle and the eyelet device can be separated from each other without destroying each other. Preferably, the eyelet device is attached to the side handle. In particular, the eyelet device is formed of metal or plastic.

According to one embodiment, the attachment means of the eyelet device is a thread, wherein the side handle comprises a counter-thread, to which the thread is screwed.

In this case, the mating thread is formed as the further fastening means. This has the advantage that the eyelet device can be easily screwed to the side handle. Furthermore, it is thus possible to attach the eyelet device to an open handle. Open handle means, for example, that the end of the handle has no attachment to the housing of the power tool. For example, the eyelet device can be screwed to the side handle instead of an existing cover of the side handle. Thus, a convenient retrofitting of the side handle with an eyelet device can be provided. Alternatively, the fastening means may also be designed as a snap or plug connection. For example, the eyelet device can be attached to the side handle by means of a material connection. In particular, the eyelet device can be soldered, welded or glued to the side handle. As another alternative, the eyelet device may be integral with the side handle or part of the side handle.

According to a further embodiment, the thread is formed as an internal thread and the counter thread as an external thread.

Advantageously, other elements of the side handle can be screwed onto the external thread in a simple manner. Alternatively, the thread may be formed as an external thread and the counter thread as an internal thread. Preferably, the thread and the counter thread are formed as metric threads.

According to a further embodiment, the side handle comprises a columnar gripping portion, a ring portion and a connecting portion connecting the gripping portion to the ring portion.

For example, the gripping portion comprises an internal thread which can be screwed to the mating thread. The gripping portion includes a gripping surface adapted to be gripped by a human hand. For example, the gripping surface is padded. For example, the ring portion engages positively into the connecting portion, d. H. extends partially through the connecting portion. The ring portion is formed, for example, as a ring-shaped band. The connecting portion is formed, for example, as an intermediate portion between the ring portion and the gripping portion. For example, the connecting portion comprises a further gripping surface. For example, the further gripping surface adjoins the gripping surface. Alternatively, the gripping surface and the further gripping surface are spaced from each other. For example, the other gripping surface is padded.

According to another embodiment, the eyelet portion protrudes from a bottom of the gripping portion when the eyelet device is attached to the side handle.

The floor is, for example, facing away from the ring section. Preferably, the bottom comprises an opening in an inner space enclosed by the gripping portion. For example, the attachment means projects into the gripping section. For fastening the fastening means with the further fastening means, the fastening means can preferably be guided through the opening of the floor.

According to a further embodiment, the eyelet device comprises a pipe section which is formed on the eyelet section, which comprises fastening means and projects into the gripping section when the eyelet device is attached to the side handle.

Advantageously, thereby the fastening means hidden and therefore provided outside the field of view of the operator. Furthermore, with the help of the pipe section sufficiently large forces can be transmitted.

According to another embodiment, the eyelet portion of the eyelet device is arranged eccentrically to a longitudinal axis of the gripping portion when the eyelet device is attached to the side handle.

For example, the eyelet section projects from the gripping section in the radial direction of the gripping section. For example, the gripping portion is rotationally symmetrical about the longitudinal axis, which is perpendicular to the radial direction, of the gripping portion.

According to another embodiment, the eyelet device is disposed between the gripping portion and the connecting portion when the eyelet device is attached to the side handle.

Advantageously, thereby the eyelet device near the thumb, when a hand grips the gripping portion.

According to a further embodiment, the connecting portion is column-shaped.

For example, the gripping portion continuously merges into the connecting portion. Advantageously, thereby the side handle can be gripped comfortably.

According to a further embodiment, the ring portion and the connecting portion are adapted to enclose a round portion of the power tool for rotatably attaching the side handle to the power tool.

Advantageously, thereby the side handle can be adjusted relative to the housing of the power tool. Preferably, the connecting portion comprises a receptacle for the round section. The receiving area and the ring portion enclose an entire circumference of the round portion of the power tool. Alternatively, the side handle rotatably (ie without rotation function) may be formed with the housing of the power tool.

According to another embodiment, the side handle comprises a screw which secures the gripping portion to the connecting portion.

For example, the screw extends at least partially through the connecting portion. Preferably, a screw head of the screw bears on a stop of the connecting section, in particular so that the screw is fixed in a form-fitting manner downwards. For example, the screw head faces the ring portion. Preferably, one end of the screw, which is remote from the screw head, provided within the gripping portion and in particular facing away from the ring portion.

According to a further embodiment, the screw comprises the mating thread.

Thus, all components of the side handle and the eyelet device can be held together and fastened together in a simple manner. Preferably, the end of the screw is disposed within the tube portion of the eyelet device when the eyelet device is attached to the side handle.

According to a further embodiment, the screw is surrounded by the gripping portion and the connecting portion and extends through a longitudinal axis of the connecting portion.

Advantageously, thereby the screw outside the field of view. For example, the screw extends at least partially through the longitudinal axis of the gripping portion. Preferably, the screw is thereby arranged centrally in the gripping section.

Furthermore, a hand tool with an arrangement, as described above, is provided.

According to one embodiment, the handheld power tool comprises a round section to which the side handle is rotatably mounted.

Preferably, the round portion is arranged concentrically with the chuck of the power tool. For example, the round section is a part of the housing of the power tool. Preferably, the round section is made of plastic educated. The round portion is preferably formed as a bearing seat for the side handle.

The embodiments and features described for the arrangement apply to the hand tool according to and vice versa.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1

eine schematische Seitenansicht einer Handwerkzeugmaschine;

Fig. 2

eine schematische Seitenansicht einer Ausführungsform einer Anordnung der Handwerkzeugmaschine gemäß Fig. 1;

Fig. 3

Schnitt III - III aus Fig. 2; und

Fig. 4

eine weitere Ausführungsform der Anordnung.

The following description explains the invention with reference to exemplary embodiments and figures. In the figures shows:

Fig. 1

a schematic side view of a power tool;

Fig. 2

a schematic side view of an embodiment of an arrangement of the power tool according to Fig. 1 ;

Fig. 3

Section III - III off Fig. 2 ; and

Fig. 4

a further embodiment of the arrangement.

Identical or functionally identical elements are indicated by the same reference numerals in the figures, unless stated otherwise.

EMBODIMENTS OF THE INVENTION

Fig. 1 shows a schematic side view of a hand tool 1. The hand tool 1 is, for example, a hammer drill, a chisel hammer, a core drill, a saw, a grinder, a screwdriver, a bolt pushing tool or a saw.

The hand tool 1 comprises a housing 2 to which, for example, a battery 3 is attached. Alternatively, a power cable may be attached to the housing 2, which is connectable to a socket (not shown). Furthermore, the housing 2 comprises a main handle 4, which is arranged at the rear. Furthermore, a fastening device 5 for attaching a cutting tool (not shown) is provided. In this case, the fastening device 5 is provided on the front of the hand tool 1. The fastening device 5 is, for example, a chuck. Furthermore, the Hand tool 1 a round section 6, which is arranged between the main handle 4 and the fastening device 5. The round section 6 (indicated by dashed lines) is, for example, cylindrical.

Furthermore, an arrangement 7 with a side handle 8 for the hand tool 1 and an eyelet device 9 is provided. The eyelet device 9 comprises an eyelet portion 10 which is adapted to be connected to a safety belt 11. Furthermore, the eyelet device 9 comprises a fastening means 12, which is adapted to be attached to the side handle 8. Preferably, the safety belt 11 comprises a fastening element 13, in particular a snap hook or the like, which is adapted to be releasably connected to the eyelet portion 10. For the eyelet portion 10 is formed for example as a closed ring element. The eyelet portion 10 comprises a closed ring portion and is formed as a holding portion which encloses an opening 16. For example, the fastening element 13 engages in the opening 16 to form a positive connection between the eyelet section 10 and the fastening element 13. In particular, thus, the fastener 13 can be securely hooked into the eyelet portion 10.

For example, the safety belt 11 comprises a further fastening element 14, in particular a snap hook, which is adapted to be fastened to a support structure 15 or to a person, in particular an operator (not shown). With the aid of the arrangement 7 and with the aid of the safety belt 11, it is possible to prevent the handheld power tool 1 from falling down from a building or a scaffold and causing personal injury. The Fig. 1 shows the side handle 8 and the eyelet device 9 in unconnected state.

Fig. 2 shows the arrangement 7 in a schematic side view. The side handle 8 includes a columnar gripping portion 17, a ring portion 18 and a connecting portion 19 connecting the gripping portion 17 to the ring portion 18. The gripping portion 17 is padded on the outside, for example, to increase gripping comfort. Also, the connecting portion 19 may in particular be padded on the outside.

In addition, the eyelet portion 10 protrudes from a bottom 20 of the gripping portion 17. In this case, the bottom 20 faces away from the ring element 18. Thus, the eyelet portion 10 is also remote from the ring portion 18. In particular, the gripping portion 17 is rotationally symmetrical about a longitudinal axis L1 of the gripping portion 17. The grommet 9 is attached to the side handle 8 such that the longitudinal axis L1 (extended considered) of the gripping portion 17, the eyelet device 9, in particular the eyelet portion 10, cuts. Preferably, the eyelet device 9 limits the side handle 8 downwards.

The connecting portion 19 preferably connects to an upper side 21 of the gripping portion 17. The top 21 is remote from the bottom 20. The connecting portion 19 is formed in a columnar shape. In this case, the connecting portion 19 extends from the upper side 21 along a longitudinal axis L2 of the connecting portion 19 toward the annular element 18. For example, the longitudinal axis L2 is concentric with the longitudinal axis L1.

Fig. 3 shows a schematic section III - III Fig. 2 , The section III-III runs through the longitudinal axis L1 and can be referred to as a longitudinal section of the side handle 8 and the arrangement 7. The fastening means 12 of the eyelet device 9 is formed for example as a thread 22, wherein the side handle 8 comprises a mating thread 23, to which the thread 22 can be screwed. In this case, the thread 22 is formed as an internal thread. Furthermore, the mating thread 23 is formed as an external thread.

Alternatively, the thread 22 may be formed as an external thread (see Fig. 1 ), wherein the counter thread 23 is correspondingly formed as an internal thread (not shown).

The eyelet device 9 comprises a pipe section 24, which comprises the fastening means 12 and projects into the gripping section 17. For the gripping portion 17 is hollow, in particular tubular, is formed. The pipe section 24 is in particular formed rotationally symmetrical to the longitudinal axis L1. For example, the eyelet portion 10 comprises a collar 25, which rests against the bottom 20 and to which the pipe section 24 is integrally formed. In this case, the pipe section 24 extends from the collar 25 in the direction of the annular portion 18, wherein the eyelet portion 10 is formed in particular on the collar 25 and extending in the opposite direction (ie away from the annular portion 18) of the collar 25.

Furthermore, the gripping portion 17, for example, an internal thread 26 which is screwed onto the mating thread 23. For example, the gripping portion 17 is connected to the intermediate portion 19 by means of a screw connection. In this case, the gripping portion 17 preferably screwed to the mating thread 23 before the eyelet device 9 is screwed to the mating thread 23.

The side handle 8 includes, for example, a screw 27 which fixes the gripping portion 17 to the connecting portion 19. For example, the screw 27 comprises the mating thread 23. The screw 27 is surrounded in particular by the gripping portion 17 and the connecting portion 19 and extends through the longitudinal axis L2 of the connecting portion 19. In this case, a screw head 28, for example, within the connecting portion 19 and an end 29 of the screw 27th (Also referred to in the present case as a screw end) arranged within the gripping portion 17. In this case, a stop 30 of the connecting portion 19 serves as a support for the screw head 28. For example, the screw 27 is inserted on the ring element side (from above) into the connecting portion 19. Preferably, the screw 27 is rotatably provided within the connecting portion 19, so that the eyelet device 9 can be screwed without additional holding the screw 27 to the screw 27.

In particular, the connecting section 19 comprises a support section 31 on the ring element side. The ring element 18 is guided through the support section 31. For example, end portions 32, 33 of the ring portion 18 are arranged overlapping within the support portion 31. Furthermore, in particular the screw 27 extends through the overlapping arranged end portions 32, 33. Therefore, the ring portion 18, for example, positively connected to the connecting portion 19 and the screw 27. Alternatively, the connecting portion 19 and the ring portion 18 and / or the gripping portion 17 may be integrally formed, in particular materialeinstückig.

Furthermore, the support portion 31 may include a concave receptacle 34. The ring section 18 may in particular comprise a tension band 35. The receptacle 34 and the ring segment 35 enclose an opening 36 through which the round section 6 of the hand tool 1 (see Fig. 1 ) extends when the assembly 7 with the housing 2 (see Fig. 1 ) connected is. In this case, the round portion 6 between the receptacle 34 and the ring segment 35 can be clamped. In particular, the receptacle 34 and the ring segment 35 are adapted to enclose the round portion 6 of the hand tool 1 for rotatably attaching the side handle 8 to the power tool 1. For example, locking means (not shown) may be provided to secure the side handle 8 to the housing 2 (see FIG Fig. 1 ) of the power tool 1 to fix.

Fig. 4 shows a schematic sectional view of another embodiment of the arrangement 7. In contrast to Fig. 3 the eyelet device 9 is disposed between the gripping portion 17 and the connecting portion 19. Furthermore, the eyelet portion 10 of the eyelet device 9 is arranged eccentrically to the longitudinal axis L1 of the gripping portion 17. For example, the eyelet device 9 is formed as a nut 37, to which the eyelet portion 10 is formed radially. Thus, the Ösenabschnitt protrudes in the radial direction R from the nut 37. In this case, the radial direction R extends perpendicular to the longitudinal axis L1 and / or the longitudinal axis L2. The eyelet device 9 adjoins the upper side 21 of the gripping portion 17.

Optionally, a cap 38 may be provided to close a lower opening 41 of the gripping portion 17. For example, the cap 38 may comprise a pipe section 39 with an internal thread 40, which in the same way as the pipe section 24 (see Fig. 3 ) is screwed to the screw 27. However, instead of the cap 38, the bottom 20 may be provided closed, so that no opening 41 is present.

LIST OF REFERENCE NUMBERS

1

Hand tool

2

casing

3

battery pack

4

Main handle

5

fastening device

6

round section

7

arrangement

8th

Side handle

9

Ösenvorrichtung

10

eye portion

11

safety belt

12

fastener

13

fastener

14

fastener

15

supporting structure

16

opening

17

cross section

18

ring section

19

connecting portion

20

ground

21

top

22

thread

23

mating thread

24

pipe section

25

collar

26

inner thread

27

screw

28

screw head

29

The End

30

attack

31

support section

32

end

33

end

34

admission

35

ring segment

36

opening

37

mother

38

cap

39

pipe section

40

inner thread

41

opening

L1

longitudinal axis

L2

longitudinal axis

R

radial direction

Claims (15)

Arrangement (7) with a side handle (8) for a hand tool (1) and an eyelet device (9), which has an eyelet section (10) which is adapted to be connected to a safety belt (11), and a fastening means (12 ) adapted to be attached to the side handle (8). Arrangement according to claim 1, characterized in that the fastening means (12) of the eyelet device (9) is a thread (22), wherein the side handle (8) comprises a counter-thread (23) to which the thread (22) can be screwed. Arrangement according to claim 2, characterized in that the thread (22) as an internal thread and the counter-thread (23) are formed as an external thread. Arrangement according to one of claims 1 to 3, characterized in that the side handle (8) a columnar gripping portion (17), a ring portion (18) and a connecting portion (19) connecting the gripping portion (17) with the ring portion (18) , includes. Arrangement according to claim 4, characterized in that the eyelet portion (10) protrudes from a bottom (20) of the gripping portion (17) when the eyelet device (9) is attached to the side handle (8). Arrangement according to claim 5, characterized in that the eyelet device (9) comprises a pipe section (24) which is integrally formed on the eyelet section (10), which comprises fastening means (12) and projects into the gripping section (17) when the eyelet device ( 9) is attached to the side handle (8). Arrangement according to claim 4, characterized in that the eyelet portion (10) of the eyelet device (9) is arranged eccentrically to a longitudinal axis (L1) of the gripping portion (17) when the eyelet device (9) is attached to the side handle (8). Arrangement according to claim 7, characterized in that the eyelet device (9) between the gripping portion (17) and the connecting portion (19) is arranged when the eyelet device (9) on the side handle (8) is attached. Arrangement according to one of claims 4 to 8, characterized in that the connecting portion (19) is column-shaped. Arrangement according to one of claims 4 to 9, characterized in that the annular portion (18) and the connecting portion (19) are adapted to a round portion (6) of the power tool (1) for rotatably attaching the side handle (8) to the power tool (1) to enclose. Arrangement according to one of claims 4 to 10, characterized in that the side handle (8) comprises a screw (27) which fixes the gripping portion (17) to the connecting portion (19). Arrangement according to claims 2 and 11, characterized in that the screw (27) comprises the counter-thread (23). Arrangement according to claim 11 or 12, characterized in that the screw (27) of the gripping portion (17) and the connecting portion (19) is surrounded and extends through a longitudinal axis (L2) of the connecting portion (19). Powered hand tool (1) with an arrangement (7) according to one of claims 1 to 13. Powered hand tool (1) according to claim 14, characterized by a round section (6) to which the side handle (8) is rotatably mounted.

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