AU2023312866A1

AU2023312866A1 - Screw with force application

Info

Publication number: AU2023312866A1
Application number: AU2023312866A
Authority: AU
Inventors: Frank Langewiesche
Original assignee: Spax International GmbH and Co KG
Current assignee: Spax International GmbH and Co KG
Priority date: 2022-07-27
Filing date: 2023-07-06
Publication date: 2024-10-17
Also published as: EP4311947A1; TWI861982B; WO2024022776A1; TW202417189A; CA3248363A1

Abstract

The invention relates to a screw (1) with a force application (3) as well as a corresponding actuating tool and to a system comprising a screw of said type and to a claimed actuating tool.

Description

TITLE: SCREW WITH DRIVE

Description

The invention described below relates to a screw with a drive as well as an actuating tool and a system consisting of the screw and the actuating tool according to the independent claims.

Screws with a drive are known from the prior art. They usually have a pin that serves to better hold the actuating tool in the screw.

However, it has transpired that the screws according to the prior art have considerable drawbacks. The pin usually has a diameter that is smaller than the diameter between opposite profile pieces of the drive.

For some years now, the hexalobular internal driving feature has been used for screws in the woodworking industry. This hexalobular internal drive has substantial advantages as it functions positively in the form of a snug fit and the so-called cam out effect cannot occur.

Since such a system consisting of a screw and actuating tool represents a fit, this fit must be designed with play. Slight wobbling cannot be ruled out. To achieve a better fit and to minimize wobbling, improvements have already been made in the prior art. However, there is still the disadvantage in the prior art that a mandatory axial position between the tool and the screw is required as otherwise there may be incorrect screwing.

It may easily be the case during handling that the actuating tool, in particular a bit, wobbles and/or slips out of the drive of the screw such that the actuating tool can slip and damage the drive of the screw.

Patent EP 1230489 B Iis mentioned as an example of the prior art.

It is therefore the object of the present invention to eliminate or at least reduce the drawbacks of the prior art and in particular to provide an improved drive.

This object is achieved with the subject of the independent claims. Advantageous further developments of the invention are given in the dependent claims. All combinations of at least two features given in the description, claims and/or figures also fall within the scope of the invention. In the specified value ranges, values lying within the specified limits are also to be disclosed as limit values and can be claimed in any combination.

The invention relates to a screw, in particular a wood screw, having a head with a drive for an actuating tool, wherein the drive has a Hexalobular profile, wherein the Hexalobular profile has a diameter D1 between oppositely arranged profile pieces, wherein the head has a receiving opening for a pin of the actuating tool, wherein the receiving opening has a diameter D2, wherein the diameter D2 of the receiving opening is greater than the diameter of the Hexalobular profile D1.

The invention also relates to an actuating tool, in particular for actuating a screw according to the invention, having a Hexalobular profile, wherein the Hexalobular profile has a diameter dl between oppositely arranged recesses, wherein the actuating tool has a pin, wherein the pin has a diameter d2, wherein the diameter d2 of the pin is greater than the diameter dl of the Hexalobular profile.

The invention also relates to a system consisting of a screw according to the invention and a tool according to the invention.

According to the invention, it is advantageously possible to substantially prevent the risk of sloppy screwing. This is achieved according to the invention by virtue of the fact that the diameter of the pin is greater than the smallest diameter of the positive profile of the drive.

In particular, the inner profile also extends to the pin and functions as a guide profile.

This allows the pin to be better inserted into the opening of the drive for a clean axial fit for optimum screwing.

The risk of non-axial / sloppy screwing is minimized.

It is further advantageous in particular to make a tangent-constant transition to a rounded shape, for example a sphere, at the front end of the pin guide.

It is preferably provided that a spherical tip is attached with a constant tangent in the diameter D2.

Advantageously, it is in particular possible that the actuating tool, in particular the bit, can be guided into the receiving opening from the beginning and the pin of the actuating tool, or of the bit, is not supported at the transition of the hexalobular internal drive profile to the guide support of the drive of the screw, which can lead to a non-optimal fit of the drive of the screw and the actuating tool.

The screw can basically be any type of screw. In particular, the invention relates to so-called wood screws which can be used for screwing in wood, in particular for use in the furniture industry or woodworking industry.

This screw extends along a longitudinal axis L. In particular, the screw extends along the longitudinal axis L from a head with a drive to a foremost region, which is in particular designed as the tip. Instead of a tip, a blunt end, in particular a truncated cone-shaped end, can also be formed.

The screw or the actuating tool is designed to be rotationally symmetrical to the longitudinal axis in the region of the drive. The screw traditionally has a thread, which extends between the head and the foremost region.

In one preferred embodiment, it is provided that the receiving opening is at least partially round, in particular elliptical or spherical. This can advantageously prevent the actuating tool from jamming in the receiving opening.

In one particularly preferred embodiment, it is provided that the receiving opening is circular cylindrical in shape in certain areas, with a spherical area adjoining it.

It is preferably further provided that the receiving opening is round, in particular elliptical or spherical in the foremost area. This particularly advantageous prevents the actuating tool from jamming in the receiving opening.

In another preferred embodiment, it is provided that the profile pieces extend as guide projections in the receiving opening. This makes it advantageously possible for the actuating tool and in particular the pin to be guided into the end of the receiving opening.

In one preferred embodiment, it is provided that the guide projections are arranged to be distributed uniformly over the circumference of the receiving opening. This makes an advantageous uniform support of the pin possible. It is preferably further provided that the guide projections are spaced apart from one another at a circumferential angle of 60.

Advantageously, the guide projections of the receiving opening correspond with the profile recesses of the actuating tool of the pin such that optimum guidance can be ensured.

In another preferred embodiment, the guide projections extend in the longitudinal direction of the screw up to a front area of the receiving opening, preferably to a spherical front area of the receiving opening. This results in particularly efficient support in the longitudinal direction such that jamming can be prevented particularly efficiently.

The actuating tool has corresponding formations to the formations of the screw in the region of the pin.

The pin of the actuating tool has corresponding guide recesses, which correspond with the guide projections of the receiving opening. The guide recesses are accordingly designed as the negative counterparts to the guide projections of the screw.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments as well as based on the drawings, in which:

Figure 1 schematically shows a plan view of a drive of a screw according to the invention,

Figure 2 schematically shows a cross section through the head of the screw of Figure 1 according to the invention along the section line shown,

Figure 3 schematically shows the screw from Figure 1, wherein the head is rotated by an angle of 30°,

Figure 4 schematically shows a cross section through the head of the screw of Figure 3 according to the invention along the section line shown,

Figure 5 schematically shows a side view of an actuating tool according to the invention,

Figure 6 schematically shows a plan view of a Hexalobular profile and a pin of the actuating tool of Figure 5,

Figure 7 schematically shows a system consisting of a screw according to the invention and an actuating tool according to the invention and

Figure 8 schematically shows the system from Figure 7, wherein the system is rotated by an angle of 30.

In the figures, advantages and features of the invention are marked with reference numbers identifying these in each case according to embodiments of the invention, wherein components or features with the same or equivalent function are marked with identical reference numbers.

Figures 1-4 show a screw according to the invention according to an exemplary embodiment.

Figure 1 schematically shows a plan view of a screw 1 according to the invention. The screw 1 has a head 2. The head 2 has a drive 3 for an actuating tool. The drive 3 has a conventional Hexalobular profile.

The Hexalobular profile has a diameter D1 between oppositely arranged profile pieces 4,4'.

Furthermore, the head has a receiving opening 5 for a pin (not shown) of an actuating tool. The receiving opening 5 has a diameter D2.

According to the invention, the diameter D2 of the receiving opening 5 is greater than the diameter D1 of the Hexalobular profile.

For the purpose of better illustration, Figure 2 schematically shows a cross section through the head 2 of the screw from Figure 1 according to the invention along the section line shown. Figure 3 schematically shows the screw 1 from Figure 1, wherein the head 2 is rotated by an angle of 30. Figure 4 schematically shows a cross section through the head 2 of the screw 1 of Figure 3 according to the invention along the section line shown.

Furthermore, Figure 2 shows that the receiving opening 5 is spherical. The receiving opening 5 is initially circular-cylindrical in shape in certain areas, with a spherical area adjoining it.

The profile pieces 4,4' extend as guide projections 6,6' in the receiving opening 5. The guide projections 6,6' are arranged to be distributed uniformly over the circumference of the receiving opening 5, wherein six guide projections 6,6' are correspondingly spaced apart from one another at a circumferential angle of 60°.

The guide projections 6,6' extend in the longitudinal direction L of the screw 1 up to a front area of the receiving opening 5, wherein this front area, as already described, is spherical.

Figure 5 schematically shows a side view of an actuating tool according to the invention, in particular of a bit 10. The actuating tool 10 conventionally has a Hexalobular profile, wherein the Hexalobular profile conventionally has six profile pieces 13,13',13",13"'. The Hexalobular profile has recesses 14,14' between the profile pieces 13,13',13",13"'.

According to the invention, the actuating tool 10 has a pin 11, wherein this pin11 corresponds with the receiving opening 5 of the screw according to the invention. In this preferred embodiment, the pin 11 is thus spherical in the foremost area.

Furthermore, the pin 11 in this embodiment has six guide recesses 12,12',12", wherein these guide recesses 12,12',12" correspond with the guide recesses 6,6" of the screw according to the invention.

The guide recesses 12,12',12" thus extend into the pin from the recesses 14,14' of the hexalobular profile.

The guide recesses 12 are arranged to be distributed uniformly over the circumference of the pin 11. Similarly to the guide projections 6,6' of the screw, there are six corresponding guide recesses 12, 12',12" in the pin, wherein the guide recesses 12,12',12" are spaced apart from one another at a circumferential angle of 60.

The guide recesses 12,12',12" extend up to a front area of the pin 11.

The pin 11 is spherical in the foremost area.

Figure 6 schematically shows a plan view of the actuating tool from Figure 5 according to the invention.

According to the invention, the hexalobular profile has a diameter dl between oppositely arranged recesses 14,14'. The pin 11 has a diameter d2 according to the invention. According to the invention, the diameter d2 of the pin 11 is greater than the diameter dl of the hexalobular profile of the actuating tool.

Figure 7 schematically shows a system consisting of the screw according to the invention in accordance with Figures 1-4 and the actuating tool from Figures 5-6 according to the invention. Figure 8 schematically shows the system from Figure 7, wherein the system is rotated by an angle of 30°.

According to the invention, the diameter D2 of the receiving opening 5 is greater than the diameter D1 of the hexalobular profile of the screw. This is an advantageous way of achieving an optimum fit and preventing jamming.

The embodiments described merely serve to illustrate one example of the invention. These embodiments are in no way intended to limit the basic idea of the invention.

Reference list

1 Screw 2 Head 3 Drive 4,4' Profile piece Receiving opening 6,6' Guide projections Actuating tool 11 Pin 12,12',12" Guide recesses 13,13',13",13.' Profile piece 14,14' Recesses dl,d2 Diameter Dl,D2 Diameter L Longitudinal axis / longitudinal direction

Claims

1. Screw (1), in particular wood screw, having a head (2) with a drive (3) for an actuating tool (10), wherein the drive (3) has a hexalobular profile, wherein the hexalobular profile has a diameter D1 between oppositely arranged profile pieces (4,4'), wherein the head (2) has a receiving opening (5) for a pin (11) of the actuating tool (10), wherein the receiving opening (5) has a diameter D2, characterized in that the diameter D2 of the receiving opening (5) is greater than the diameter D1 of the hexalobular profile.

2. Screw (1) according to Claim 1, wherein the receiving opening (5) is at least partially round, in particular elliptical or spherical.

3. Screw (1) according to at least one of the preceding claims, wherein the receiving opening (5) is circular-cylindrical in shape in certain areas, with a spherical area adjoining it.

4. Screw (1) according to at least one of the preceding claims, wherein the receiving opening (5) is preferably round, in particular elliptical or spherical in the foremost area.

5. Screw (1) according to at least one of the preceding claims, wherein the profile pieces (4,4') extend as guide projections (6,6') in the receiving opening (5).

6. Screw (1) according to at least one of the preceding claims, wherein the guide projections (6,6') are arranged to be distributed uniformly over the circumference of the receiving opening (5), preferably spaced apart from one another at a circumferential angle of 60°.

7. Screw (1) according to at least one of the preceding claims, wherein the guide projections (6,6') extend in the longitudinal direction (L) of the screw (1) up to a front area of the receiving opening (5), preferably to a spherical front area of the receiving opening (5).

8. Screw (1) according to at least one of the preceding claims, wherein a spherical tip (5) is attached with a constant tangent in the diameter D2.

9. Actuating tool (10), in particular for actuating a screw (1) according to at least one of the preceding claims, having a hexalobular profile, wherein the hexalobular profile has a diameter dl between oppositely arranged recesses (14,14'), wherein the actuating tool (10) has a pin (11), wherein the pin (11) has a diameter d2, characterized in that the diameter d2 of the pin (11) is greater than the diameter dl of the hexalobular profile.

10. System consisting of a screw (1) according to at least one of the preceding claims and an actuating tool (10) according to at least one of the preceding claims.