CZ37691U1 - Wall anchor - Google Patents

Description

In the registration procedure, the Industrial Property Office does not determine whether the subject of the utility model meets the conditions of eligibility for protection according to § 1 of Act. No. 478/1992 Coll.

Wall anchor

Field of technology

The presented technical solution relates to an anchor in the wall, in particular for attaching a thermal jacket to the wall of a building in order to obtain a heat-insulating jacket.

Wall anchors suitable for attachment to a wall are known. The anchor includes a cylindrical body with expandable ribs that is suitable for placement in a hole in the wall and a screw that is screwed into the body of the anchor to expand the ribs that open in the hole in the wall and firmly hold the wall anchor.

Current state of the art

However, as is known, wall anchors are primarily intended for solid walls (concrete walls, solid brick walls, etc.). This results in a poor fit of the wall anchor in walls made of perforated bricks or friable materials such as plasterboard, fiber cement board, fibre-reinforced plasterboard etc.

Anchors according to the prior art are aggravated by some disadvantages, which result mainly from the fact that the different thickness of the insulation panels of the thermal jacket forces the seller to stock a relatively large number of anchors with bodies with expandable ribs of different lengths.

In addition, the excessive length of the anchor body results in difficulties with relatively high packaging and storage costs.

The essence of the technical solution

The purpose of this technical solution is to provide an anchor that does not have the above-mentioned disadvantages and is simple and cheap to manufacture.

Another purpose is to provide such an effective, reliable anchor that is particularly suitable for achieving clamping even in the case of walls made of perforated bricks or panels of friable materials

Still another purpose is to provide such an anchor which is versatile and suitable for use with different thicknesses of the thermal jacket.

These objectives are achieved according to a technical solution with the characteristics where, the wall anchor comprises a body suitable for insertion into the hole in the wall and provided with retaining means suitable for retaining the body in the wall opening, and a screw suitable for screwing into the body to extend the retaining means for firm clamping an anchor inside a hole in the wall, where the body includes a first part and a second part suitable for sliding assembly into the first part for adjusting the length of the anchor, and the anchor further includes anti-rotation means suitable for preventing rotation of the second part relative to the first part of the anchor body.

Advantageously, the anti-rotation anchor means comprise a grooved connection between the first part and the second part of the body.

Preferably, the first part of the body includes a socket with an axial channel and the second part of the body includes a shaft having an axial channel for receiving a screw and a head sliding in the axial channel of the socket, the axial channel of the first part of the body having a polygonal cross-section and the head of the shaft having a polygonal circumference and the anti-rotation means include the head shaft connected to the axial channel of the first part

- 1 CZ 37691 U1 body.

Preferably, the axial channel of the first part of the body has an octagonal cross-section and the stem head has an octagonal circumference.

Furthermore, preferably, the first part of the body contains a shaft extending axially from the second end of the sleeve, the shaft having a smaller diameter than the sleeve and the axial channel of the sleeve ending at the inner collar on the shaft, which acts as a stop surface for said head of the shaft.

Furthermore, the first part of the body includes a disc-shaped head radially protruding from the first end of the sleeve.

Preferably, the head of the first body part has a plurality of holes.

Preferably, the first part of the body contains longitudinal ribs.

Preferably, the stem of the first part of the body has longitudinal grooves ending in the radial openings of the second end of the sleeve.

Preferably, the retaining means are arranged in said shaft of the second part of the body.

Furthermore, preferably, the retaining means comprise longitudinal ribs of a corrugated type, which are suitable for corrugation when the screw is screwed into the axial channel of the stem (50) of the second body part.

Furthermore, advantageously, the longitudinal ribs of the stem of the second part of the body are arranged between the longitudinal grooves and are mutually connected by an end block arranged at one end of the stem of the second part of the body.

Advantageously, the longitudinal ribs of the stem of the second part of the body have ribs arranged as threads.

Preferably, the anchor also contains a dowel suitable for insertion in the seat subsequently formed behind the axial channel of the first part of the body.

Further preferably, the anchor includes a disc-shaped head radially projecting from the first end of the socket, a stop surface for the dowel which is arranged in the axial channel to lock the dowel in the seat, the rear surface of the dowel being flush with the rear surface of the head.

Clarification of drawings

Other features of the technical solution will become clearer from the detailed description that follows, with reference to the purely illustrative and therefore non-limiting embodiment shown in the attached drawings, where:

Giant. 1 is an exploded perspective view of an anchor according to a utility model;

Giant. 2 is a top view of the first part of the wall anchor body;

Giant. 3 is a top perspective view of a second, partially interrupted portion of the anchor body;

Giant. 4 is a perspective view of the anchor body in an assembled state before the screw is screwed into the body;

Giant. 5 is an axial sectional view of the wall anchor body in the assembled state after the screw has been screwed into the wall anchor body and after the ribs of the body have been twisted;

- 2 CZ 37691 U1

Giant. 6 is an exploded perspective view of a wall anchor and thermal coating to be applied to a perforated brick wall;

Giant. 7 is a perspective view of the assembled anchor body and of the hole formed in the heat jacket applied to the wall of FIG. 6;

Giant. 8 is a horizontal cross-sectional view of the anchor attached to the heat jacket and wall of FIG. 7.

Examples of implementing a technical solution

With the help of pictures, the anchor is described according to the technical solution, which is marked with reference number 1.

Referring now to Fig. 1, the anchor 1 comprises a body 2 suitable for placement in a hole in the wall and a screw 3 suitable for screwing into the body 2.

The body 2 has retaining means A when the screw 3 is screwed into the body 2, the retaining means A will expand, which will secure the anchor in the hole in the wall.

The body 2 comprises a first part 4 and a second part 5. The first part 4 and the second part 5 of the body 2 are two separate elements that can be assembled together. The second part 5 can be slidably mounted in the first part 4 so as to adjust the length of the anchor according to the thickness of the wall where the anchor is to be applied.

Anti-rotation means B are provided to prevent rotation of the second part 5 relative to the first part 4 of the body 2 of the armature.

The first part 4 comprises a sleeve 40 of cylindrical shape with an axial channel 41 open at both ends.

Referring also to Fig. 2, the axial channel 41 of the sleeve 40 is not cylindrical in shape but polygonal in cross-section. The term "polygonal shape" means either a regular polygon or an irregular polygon or a slotted profile, such as a perimeter with slots and/or ribs. The axial channel 41 preferably has an octagonal shape.

The first part 4 includes a disc-shaped head 42 which radially protrudes from the first end of the sleeve 40 and is positioned against the outer surface of the wall. The head 42 has a plurality of holes 43 having a different shape, such as a circular or triangular shape, to have a greater adhesion to the wall surface and to facilitate the alignment of the wall.

The first part 4 includes a stem 44 which extends axially from the other end of the sleeve 40 in the opposite direction relative to the head 42. The stem 44 has a smaller diameter than the sleeve 40.

Both the sleeve 40 and the stem 44 can be provided with longitudinal ribs 45 to prevent rotation of the first part 4 of the body 2 in the opening of the thermal jacket.

The stem 44 has longitudinal grooves 46 terminating in radial holes 47 at the other end of the sleeve 40.

As shown in Fig. 2, the axial channel 41 of the sleeve 40 ends at the inner ring 48 on the stem 44. The inner ring 48 acts as a stop surface for the second part 5 of the body 2. The stem 44 has an axial channel 49 of a polygonal shape, e.g. a cross shape.

If we return to Fig. 1, the second part 5 of the body 2 comprises a stem 50 which has an inner hollow cylindrical shape with an axial channel 51. The outer diameter of the stem 50 is smaller than the inner diameter of the channel 49 of the stem 44

- 3 CZ 37691 U1 of the first part 4 of the body 2 so that the stem 50 can be inserted into the axial channel 51 of the first part 4 of the body 2, intersecting the axial channel of the channel 49 of the stem 44 of the first part 4 of the body 2.

The stem 50 of the second part 5 is provided with retaining means A. Said retaining means (A) are obtained by means of a plurality of longitudinal grooves 52 in the stem 50 which define longitudinal ribs 53 between the longitudinal grooves 52. As an example, four longitudinal ribs 53 may be provided. Each longitudinal rib 53 has ribs arranged as threads.

The longitudinal ribs 53 are connected by an end block 54 arranged at one end of the stem 50 of the second part 5 of the body 2. In this way, the longitudinal ribs 53 are not typical expandable ribs of the expandable anchor according to the prior art, but are corrugated type ribs. When the screw 3 is screwed into the axial channel 51 of the second part 5 of the body 2 and the tip of the screw pierces the end block 54, the longitudinal ribs 53 do not expand radially in a uniform manner and tend to twist, i.e. be helically twisted, forming a ring around the shaft 50 of the second parts 5 of body 2.

The second part 5 of the body 2 comprises a head 55 which projects radially outwards from the shaft 50.

The head 55 of the second part 5 of the body 2 has a polygonal circumference which is complementary to the circumference of the axial channel 41 of the sleeve 40 of the first part 4 of the body 2 to prevent rotation of the first part 4 with respect to the second part 5 of the body 2.

Therefore, anti-rotation means B include the head 55 of the second part 5 of the body 2, which engages with the axial channel 41 of the sleeve 40 of the first part 4 of the body 2.

Screw 3 is a traditional 30-head threaded screw with a hole or slot for the tip of a screw-driving tool.

The anchor 1 also includes a dowel 9 suitable for insertion in the seat 12 formed in the head 42 behind the axial channel 41. In this case, a stop surface 11 for the dowel 9 is formed in the axial channel 41. The polygonal shape of the axial channel 41 extends in front of the stop surface 11. The seat 12 of the head 42 has a sufficient diameter to insert the shaft 50 of the second part 5.

The dowel 9 is made of a thermally insulating material such as plastic. The plug 7 is made of a thermally conductive material and is intended to prevent the anchor 1 from creating a thermal bridge between the outside and the inside of the building, thereby disrupting the thermal insulation.

The stop surface 11 of the seat 12 of the head 42 is made so that the back surface of the dowel 9 is flush with the back surface of the head 42. The dowel 9 thus enables perfect alignment of the coated wall.

As shown in Fig. 4 and 5, the stem 50 of the second part 5 of the body 2 is inserted from behind into the axial channel 41 of the sleeve 40 of the first part 4 of the body 2 and into the axial channel 49 of the stem 44 of the first part 4 of the body 2, so that the longitudinal ribs 53 of the stem 50 protrude outward from the first part 4 of the body 2. The head 55 of the second part 5 of the body 2 is inserted into the axial channel 41 of the sleeve 40, thereby preventing mutual rotation between the first part 4 of the body 2 and the second part 5 of the body 2. The head 55 of the second part 5 of the body 2 remains in the axial channel 41 of the sleeve 40.

Giant. 5 shows the situation in which the anchor 1 is set to its maximum length, i.e. the head 55 of the second part 5 of the body 2 is stopped against the inner ring 48 of the first part 4 of the body 2.

At this point, the screw 3 can be later inserted into the second part 5 of the body 2 and screwed into the second 5 of the body 2 so as to cause the longitudinal ribs 53 of the shaft 50 of the second 5 of the body 2 to twist. It is clear that the screw 3 can be prearranged in the second 5 of the body 2 without twisting the longitudinal ribs 53. Then the second part 5 of the body 2 with the screw 3 is inserted into the first part 4 of the body 2 so that the longitudinal ribs 53 protrude from the first part 4 of the body 2, and finally the screw 3 is screwed so to curl up

- 4 CZ 37691 U1 longitudinal ribs 53, as shown in Fig. 5.

With reference to Fig. 6, the anchor 1 is shown in the case of attaching the thermal jacket 6 to the wall 7, the wall 7 comprising perforated bricks 70 having a number of channels 71 parallel to each other. As is well known, the thermal jacket 6 may comprise a panel of foam material, possibly of the multi-layer type.

With reference to Fig. 7, the heat jacket 6 is placed on the wall 7 and a hole 8 is drilled into the heat jacket, for example using a drill or the like. The opening 8 passes through the thermal jacket and reaches up to the wall 7.

With reference to Fig. 8, it can be seen that the opening 8 formed in the thermal jacket continues through the opening 80 formed in the perforated brick 70 of the wall in connection with the channel 71 of the perforated brick.

The anchor 1 is inserted into the hole 8 of the heat jacket so that the head 42 of the first part 4 of the body 2 comes into contact with the outer surface of the heat jacket 6. The longitudinal ribs 53 of the stem 50 of the second part 5 of the anchor penetrate through the hole 80 of the perforated brick 70 and are arranged in the channel 71 perforated bricks 70.

Now the operator can tighten the screw 3 by acting the tool on the head 30 of the screw arranged inside the axial channel 41 of the first part 4 of the body 2. This causes the ribs 53 to curl inside the channel 71 of the perforated brick and the curled ribs 53 form a collar that stops against the wall of the perforated brick around the hole 80 of the perforated brick, thereby firmly attaching the anchor to the perforated brick.

It should be noted that the grooved connection between the head 55 of the second part 5 of the body 2 and the axial channel 41 of the first part 4 of the body 2 prevents mutual rotation between the first part 4 of the body 2 and the second part 5 of the body 2.

Finally, the operator inserts the dowel 9 into the seat 12 of the head 42 and performs a leveling operation 70 on the thermal jacket 6.

Equivalent variations and modifications within the reach of one skilled in the art can be made to the presented embodiments of the technical solution while still falling within the scope of the technical solution as expressed in the appended claims.

Claims (5)

1. Anchor (1) into the wall containing: - a body (2) suitable for insertion into the hole (8, 80) in the wall and provided with retaining means (A) suitable for holding the body in the hole in the wall, and - a screw (3) suitable for screwing into the body (2) to extend the retaining means (A) for firmly clamping the anchor (1) inside the hole in the wall, characterized in that the body (2) contains a first part (4) and a second part (5) suitable for sliding assembly into the first part (4) for adjusting the length of the anchor (1); and the anchor (1) further comprises anti-rotation means (B) suitable for preventing rotation of the second part (5) relative to the first part (4) of the body (2) of the anchor. 2. Anchor (1) according to claim 1, characterized in that the anti-rotation means (B) comprise a grooved connection between the first part (4) and the second part (5) of the body (2). 3. Anchor (1) according to claim 1 or 2, characterized in that the first part (4) of the body (2) contains a sleeve (40) with an axial channel (41) and the second part (5) of the body (2) contains a stem ( 50) having an axial channel (51) for accommodating the screw (3) and a head (55) sliding in the axial channel (41) of the sleeve (40), where the axial channel (41) of the first part (4) of the body (2) has a polygonal cross-section and the head (55) of the shaft (50) has a polygonal circumference and the anti-rotation means (B) comprise the head (55) of the shaft (50) engaged in the axial channel (41) of the first part (4) of the body (2). 4. Anchor (1) according to claim 3, characterized in that the axial channel (41) of the first part (4) of the body (2) has an octagonal cross-section and the head (55) of the stem (50) has an octagonal circumference. 5. Anchor (1) according to claim 3 or 4, characterized in that the first part (4) of the body (2) contains a stem (44) extending axially from the second end of the sleeve (40), the stem (44) has a smaller diameter than the sleeve (40), and the axial channel (41) of the sleeve (40) terminates at an inner collar (48) on the stem (44), which acts as a stop surface for the head (55) of the stem (50). 6. An anchor (1) according to any one of claims 3 to 5, characterized in that the first part (4) of the body (2) comprises a disc-shaped head (42) radially protruding from the first end of the sleeve (40). 7. Anchor (1) according to claim 6, characterized in that the head (42) of the first part (4) of the body (2) has a number of holes (43). 8. Anchor (1) according to any one of claims 3 to 7, characterized in that the first part (4) of the body (2) contains longitudinal ribs (45). 9. Anchor (1) according to any one of claims 5 to 8, characterized in that the stem (44) of the first part (4) of the body (2) has longitudinal grooves (46) ending in the radial holes (47) of the second end of the sleeve (40) ). 10. Anchor (1) according to any one of claims 3 to 9, characterized in that the retaining means (A) are arranged in the stem (50) of the second part (5) of the body (2). 11. An anchor (1) according to claim 10, characterized in that the retaining means (A) comprise longitudinal ribs (53) of a wavy type which are suitable for undulating when the screw (3) is screwed into the axial channel (51) of the stem ( 50) of the second part (5) of the body (2). 12. Anchor (1) according to claim 11, characterized in that the longitudinal ribs (53) of the shaft (50) of the second part (5) of the body (2) are arranged between the longitudinal grooves (52) and are connected to each other by an end block (54) arranged at one end of the shaft (50) of the second part (5) of the body (2). - 6 CZ 37691 U1 13. Anchor (1) according to claim 12, characterized in that the longitudinal ribs (53) of the stem (50) of the second part (5) of the body (2) have ribs arranged as threads. 14. Anchor (1) according to any one of claims 3 to 13, characterized in that it further comprises a dowel (9) suitable for insertion in the seat (12) subsequently formed behind the axial channel (41). 5 15. Anchor (1) according to claim 14, characterized in that it includes a disk-shaped head (42) radially protruding from the first end of the sleeve (40), a stop surface (11) for a dowel (9) which is arranged in an axial channel (41) to lock the dowel (9) in the seat (12) with the rear surface of the dowel (9) flush with the rear surface of the head (42).