DE29619030U1 - Inner corner trowel - Google Patents

Description

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(DEG20_T3)

Inside corner trowel

The invention relates to an internal corner trowel for producing fillets and coves in coatings made of plasticizable building materials in a transition area between two components at right angles to each other, e.g. foundation plate and external wall or internal wall and masonry corners at right angles to each other.

In a leaflet (7/93) from the Industrial Association for Construction Chemicals and Wood Preservatives, on page 19, there are regulations on how to create fillets or coves if, for example, these are to be made with mortar with a radius of > 4 cm. It is stipulated that the mortar, which is provided with a sealant additive, must ensure a smooth transition between the sealing of the wall and the foundation. The same applies to the production

_of fillets and coves made of bituminous building materials, whereby a smaller radius is generally chosen. It is well known to work with the so-called Danish smoothing trowel or with empty half-litre beer bottles, the outer casing of which has the required

_o _ has a radius and which are guided within the angle to be provided with a cove. It is obvious that the previously known means, despite the detailed regulations, always lead to insufficient

have led to lengthy results.

The task therefore arises of specifying a new type of tool with which fillets and coves in coatings made of plasticizable building materials can be created in a simple and repeatable manner in a transition area between two components that are at right angles to each other.

The term "plasticizable building materials" refers to sealing slurries, mortar, mortar with a sealant additive, but also hot or cold bitumen, bitumen-cement mixtures and the like, as they are used in particular for building sealing.

the.

To solve this problem, an inside corner trowel with handle is proposed, which has at least the following individual _parts :

- an elongated, trowel-like trowel part, essentially curved as a casing section around its working axis, which runs in the groove axis during use,

„p. - whose arch line consists of two sides that are perpendicular to each other in a mirror image of a plane of symmetry that runs through the working axis and of a valley arch that connects the sides in the area of the working axis and is essentially designed as a circular cylinder shell section,

- an apron part that is mirror-imaged to the plane of symmetry, the outer contour of which continues into the trowel part and is bevelled in such a way that the rising surge of plasticizable

Building materials when moving the inside corner trowel in direction 35

of the apron part can be pushed under the trowel part.

· I

With an inside corner trowel, the throat curve of which corresponds to the required radius, for roundings in the mortar > 4 cm or even > 2 cm, depending on the building material.

With the help of the trowel part, mortar can be picked up on one side and introduced into the area of the right angle. The outside of the trowel part then presses the building material into the throat rounding shape, with the apron part ensuring that the rising surge of plasticizable building material is pressed into exactly the right position and gradually introduced.

In particular, a form has proven to be suitable in which on the outside of the apron part in the longitudinal sections lying parallel to the plane of symmetry

The straight lines of the inside corner trowel run at an acute angle α to the respective surface line of the trowel part.

__ The inside corner trowel can be designed in the form of the bricklayer's trowels familiar to bricklayers with a pear-shaped handle. However, it is also possible to design the inside corner trowel in a trough-like manner, with the handle being integrated in one piece with a trowel and apron part made of plastic.

The apron part preferably has a conical section which converges towards its free end and on which, from both sides, plate-shaped, oblique and mirror-image relative to the plane of symmetry

Connect the arranged side sections.

The transition from the trowel part to the apron part should

be "soft", i.e. have rounded shoulders so that the mortar slug is gently pressed and introduced into the cove areas.

In plan view, the trowel part should preferably be slightly

be designed to be convergent in order to be able to form the contour better. For this purpose, it is proposed that the apron part in plan view converges at an angle of between 5 and 35°, preferably between

10 and 15°, with the trowel and apron parts having the greatest width at their transition point.

Furthermore, in order to fulfil the function of a trowel, the trowel
be bevelled nicely.

_n _ fulfill, the trowel part at its front end spade-

However, in contrast to this function as a "trowel", the trowel part can also be closed off at both ends by an apron part. In this case, the cove can be formed with the thrust direction on both sides of the trowel part.

For certain plasticizable building materials, _o _ certain dimensions are suitable, as set out in claims 11 and

12 are shown.

The inside corner trowel can be made of stainless steel as well as plastic or a coated metal

getting produced.
30

Examples of the internal corner trowel are shown in the drawing. The figures in the drawing show in detail:

Fig. 1 and 2 each show an inside corner trowel in a wide and narrow version in plan view;

Fig. 3 and 4 sections according to A ... A and B ... B of Fig. 1 and 2 respectively,

Fig. 5 shows a side view of a trowel according to Fig.

2;

Fig. 6 shows a perspective view of such a trowel;

Fig. 7 shows a view from the bottom;

Fig. 8 shows an application example.

In Fig. 1 and 2, an inner corner trowel 10 and 20 is shown, whereby the wider inner corner trowel according to Fig. 1 is used in particular to work with mortar, plaster, cement slurry and the like, whereby the width of the trowel part, measured from upper edge O to upper

ΔU 3-

edge O is between 120 and 180 mm.

The inside corner trowel shown in Fig. 1 consists of an elongated, trowel-like, essentially curved wedge part 1.1 as a shell section around its working axis A. The curvature of the trowel part can be seen in Fig. 3. The curvature line 5 consists of two mutually perpendicular, mirror-imaged edges opposite a plane of symmetry E running through the working axis A.

Legs 11.1 and 11.2 and from one the legs in 30

The valley arch 12.1, which essentially forms a circular cylinder shell section and connects the working axis A in the area. The valley arch has a working radius of > 4 cm, as required, for example, in the information sheet on building waterproofing, loc. cit.

The throat part 1.1 of the inside corner trowel 20 continues to the rear, i.e. in the direction of the handle, into a

apron part 2, which is mirror-imaged to the plane of symmetry E and whose outer contour continues from that of the throat part 1, the apron part is bevelled in such a way that the rising surge 60 is plastically

fiable building materials 50 (cf. Fig. 8) is pushed under the trowel part 1 when the inside corner trowel is moved in the direction of the apron part 2. The height of the apron part is to be measured according to this requirement. ₁ q Fig. 3 shows in comparison with Fig. 1 how high the apron part must be. It is approximately 2.5 to 8 cm.

The "small" version according to Fig. 2 and 4 is intended for processing bitumen masses, bitumen-containing sealing masses and the like, which are generally less fluid than the mortar masses that are processed with the device according to Fig. 1/3.

₂ Q Here the distance from top edge to top edge is between 70 and 110 mm, whereby these dimensions have proven themselves in practice and can be varied by the specialist as required.

A side view of the inner corner groove according to Fig. 2 (cf. Fig. 5) shows that an S-shaped mounting part 41 is welded into the groove part 1.2, which ends in a pear-shaped handle 40, as is known per se from bricklayer's trowels. The handle 40 is arranged at an ergonomic angle and lies freely above the apron part at such a distance that no hand injuries are to be expected.

Furthermore, it can be seen that on the outside of the g,- apron part 2 in the longitudinal sections of the inner corner parts lying parallel to the plane of symmetry E, the straight lines 25 to the respective surface line 15 of the trowel part 1 run at an acute angle α,

*· * • • » ·· ■ · • • · · • 9 • ·

which defines the angle of attack of the apron part. This angle α should be between 15 and 60°, preferably between 25 and 45°. Experience has shown that this allows the mortar to be introduced very well into the area below the trowel part and its valley bend 12.

Fig. 6 shows that the trowel part of the inside, Q corner trowel according to Fig. 2 and 4 is a trowel-like and slot-like pointed part that is moved with the handle.

Not shown is the variant in which the trowel part is closed at both ends by a protective part 2.

sen. Such a design can then no longer be used as a "trowel", but has the advantage that it can be used in both directions of movement.

As can also be seen, the apron part 2 has a conical section 21 (see Fig. 7) which converges towards its free end 22 and to which plate-shaped, oblique side sections 23.1 and 23.2 arranged in mirror image with respect to the plane of symmetry E are connected from both sides. The apron part is therefore designed to converge in plan view at an angle of between 5 and 35°, preferably between 10 and 15°, with the trowel and apron parts having the greatest width at their transition point 17. In this regard, reference can be made in particular to Fig. 1, 2 and 7.

The application of the inside corner trowel according to the above explanations is shown in Fig. 8. First

with the hollow side of the trowel mortar from a supply-35

taken and distributed in the area of the cove to be created. Then symmetrically to both mutually perpendicular components, such as here the foundation

base 61 and outer wall 63, a rounded throat can be made. By guiding the inside corner trowel 10 along and processing the respective raised ridge 60 and the corresponding mortar 50, a perfect rounded throat can be made that satisfies all regulations.

Claims (13)

Al (DEG20_A3.TAT) Protection claims 1. Inside corner trowel (10; 20) with handle for producing fillet roundings and coves in coatings made of plasticizable building materials (50) in a transition area between two components (62; 63) that are at right angles to each other, e.g. Foundation plate and external wall or internal wall and masonry corners at right angles to each other, with at least the following individual parts: - an elongated, trowel-like trowel part (1) which is essentially curved as a casing section around its working axis, which runs in the groove axis during use, - whose curvature line (5) consists of two mutually perpendicular limbs that are mirror images of a symmetry plane (E) running through the working axis. .,_ no (11.1, 11.2) and from one the legs (11.1, 11.2) in the area of the working axis interconnected throat arch (12) designed essentially as a circular cylinder shell section,
_n - a mirror image of the plane of symmetry (E) formed apron part (2), the outer contour of which continues into the trowel part (1) and which is bevelled in such a way that the rising surge (60) of plasticizable building materials can be pushed under the trowel part (1) when the inner corner trowel moves in the direction of the apron part (2). 2. Inside corner trowel according to one of the preceding claims, characterized in that the trowel part (1) j- smoothly transitions into the apron part (2) (transition point 17). 3. Inside corner trowel according to claim 1, characterized in that on the outside of the apron part (2) in _n the parallel to the plane of symmetry (E) Longitudinal sections of the inside corner trowel each lying
Straight lines (25) run at an acute angle (α) to the respective surface line (15) of the trowel part (1). 4. Inside corner trowel according to claim 3, characterized in that the acute angle (α) is 15 to 60°, preferably 25 to 45°. 5. Inside corner trowel according to claim 1, characterized net that the handle (40) is aligned parallel to the plane of symmetry (E). 6. Inside corner trowel according to claim 1 to 5, characterized in
that the skirt part (2) has a conical section (21) which converges towards its free end (22) and to which its
On both sides, plate-shaped side sections (23.1, 23.2) arranged obliquely and mirror-inverted to the plane of symmetry (E) are connected. 7. Inside corner trowel according to one of the preceding claims, characterized in that the trowel part (1) is designed to be slightly converging in plan view. 8. Inside corner trowel according to one of the preceding claims, characterized in that the apron part
(2) in plan view converging under one A3 Angle between 5 and 35°, preferably between 10 and 15°, whereby the trowel and apron part (1; 2) at their transition point (17) have the largest c width, 9. Inside corner trowel according to one of the preceding claims, characterized in that the trowel part (1) is bevelled like a spade at its front end. 10. Inside corner trowel according to one of the preceding claims, characterized in that the trowel part (1) is closed at both ends by an apron part (2). 11. Inside corner trowel for working mortar, plaster, cement slurry or the like, according to one of the preceding claims, characterized in that the width of the trowel part (1.1), measured from upper edge (O ) to upper edge (O ), is between 120 and 180 mm. 12. Inside corner trowel for processing bitumen mass, bitumen-containing sealing compounds and the like, according to a _ _c of the preceding claims, characterized net that the width of the trowel part (1.2), measured from top edge to top edge, is between 70 and 110 mm. 13. Inside corner trowel according to one of the preceding claims, characterized in that the inside corner trowel (10; 20) is made of stainless steel.