Plug for closing hole in concrete wall

Abstract

The utility model relates to a plug for sealing a hole in a concrete wall. A plug for closing a hole in a concrete wall comprises a body (2 ') and an elastic retaining device (4), The elastic retaining device (4) comprises at least one hook partially embedded in the body (2') and partially projecting from the body (2 '), the at least one hook being configured to cooperate with a hole in the concrete wall for retaining the plug in said hole.

Description

Technical Field

[0001] The present utility model relates to a plug for covering and concealing holes in a concrete wall, which holes are preferably made by a formwork anchoring system. Background Art

[0002] Plugs for covering and concealing holes in concrete walls and the like are known. The holes are typically made during the manufacturing process of the concrete wall.

[0003] Concrete walls are manufactured on-site, i.e., a gap is provided between two formwork panels which are arranged in such a way that they face each other. These panels are fixed together by an anchoring system which includes a transverse bolt having two threaded ends. The threaded ends project from the formwork panels so that corresponding nuts can be screwed on, thereby fixing the formwork panels.

[0004] Once the panels are fixed, concrete is poured into the gap sandwiched between the formwork panels. To prevent the concrete from adhering to the transverse bolt after solidification, the bolt can be pre-lined by placing it in a tube preferably made of plastic, and a cone or frustoconical element also made of plastic is placed at the end to facilitate support against the formwork. Once the concrete has solidified, the formwork panels, the transverse bolt, and the cone or frustoconical element are removed. The removal of the protective tube is optional, but since this operation is rather cumbersome, in many cases the tube is not removed but remains inside the wall.

[0005] After disassembling the anchoring system of the formwork panels, i.e., after disassembling the transverse bolt and the cone or frustoconical element, through-holes are created in the concrete wall. To conceal the holes, preferably, plugs having a frustoconical shape are placed in the holes and these plugs are fixed in the wall by applying an adhesive. Other devices for fixing the plugs are also known.

[0006] In this sense, DE202006005621U1 describes a decorative plug for concealing holes in a concrete wall, which holes are produced by the manufacturing process of the wall. The plug includes a body made of plastic and an elastic retaining device also made of plastic, which elastic retaining device holds the plug in place within a plastic protective tube of a hole in the concrete wall. The plug includes a frustoconical head and a cylindrical attachment extending from the head. A decorative metal disc is fixed to the end of the head by an adhesive. In one embodiment, the elastic retaining device includes a plurality of elongated ribs which are arranged on the attachment such that they project radially.

[0007] DE202008015694U1 describes a plug for closing holes in concrete walls, which plug comprises a body and a conically tapering retaining means. The retaining means comprises a sleeve-shaped body which is partly embedded in the body and three hooks which project from the sleeve-shaped body, and the plug is held in the hole by means of the hooks. Summary of the Utility Model

[0008] The object of the present utility model is to provide a plug for closing and concealing holes in concrete walls.

[0009] The plug of the present utility model comprises a body and an elastic retaining means, the elastic retaining means comprising at least one hook which is partly embedded in the body and partly projects from the body. The at least one hook is configured to cooperate with the hole in the concrete wall to hold the plug in the hole.

[0010] Using the plug of the present utility model facilitates placing the plug in the hole in the concrete wall, since no additional means such as adhesives are required to hold the plug in place. In addition, the fixing of the plug is also improved, since the hooks of the elastic retaining means provide good fixing whether the hole to be plugged comprises a plastic protection tube for a transverse bolt (fixed to plastic material) or does not comprise such a tube (fixed directly to the concrete).

[0011] The present utility model also relates to the following exemplary embodiments.

[0012] A plug for closing a hole in a concrete wall, the plug comprising a body and an elastic retaining means, wherein the elastic retaining means comprises at least one hook which is partly embedded in the body and partly projects from the body, and the at least one hook is configured to cooperate with the hole in the concrete wall to hold the plug in the hole.

[0013] The body comprises a cylindrical or frustoconical head, and the at least one hook projects directly from the side surface of the head.

[0014] The head of the body comprises a length within which the at least one hook is placed.

[0015] The at least one hook is arranged perpendicular or inclined to the longitudinal axis of the body.

[0016] The body comprises a cylindrical or frustoconical head, and the at least one hook projects axially from the front surface of the head.

[0017] The body further includes a base, and a head of the body extends axially from the base. The head has a smaller diameter than the base. Preferably, the head and the base form a single component.

[0018] The hook includes a retaining flange, and a free end of the retaining flange is located at a distance from a longitudinal axis of the plug, and the distance is greater than a radius of the hole to be blocked in the concrete wall. So that in use, when the plug is disposed in the hole to be blocked, the retaining flange is compressed in the hole.

[0019] The elastic retaining means includes a hook, and the hook includes a conical or circular retaining flange and a stem. Preferably, the stem takes the form of a rod or a helical bolt. The retaining flange is attached to the stem, and at least a portion of the stem is embedded in the body.

[0020] The elastic retaining means includes a hook, and the hook includes a retaining flange in the form of a frustoconical ring and a support. A smaller-sized end of the frustoconical ring is attached to the support. The support is a circular ring or a disc, and at least a portion of the support is embedded in the body.

[0021] The elastic retaining means includes a hook, and the hook includes a retaining flange in the form of an annulus or a disc, and a portion of the annulus or the disc is embedded in the body.

[0022] An embedded portion of the hook is fixed to a rod or a helical bolt, and the rod or the helical bolt is also embedded in the body.

[0023] The elastic retaining means includes a plurality of hooks. The retaining flanges of each hook are spaced apart in a direction of the longitudinal axis. The distance of each retaining flange preferably decreases according to an insertion direction of the plug, wherein the plug is closer to the hole to be blocked.

[0024] The retaining flange includes at least one notch, and the at least one notch is disposed at a distal end of the retaining flange.

[0025] The elastic retaining means includes a set of hooks, and the set of hooks includes at least two hooks arranged equidistantly around the body. Each hook includes a corresponding retaining flange, and the hooks are attached to each other by a retaining element.

[0026] The retaining flanges of corresponding hooks are attached to each other by a U-shaped retaining element. A portion of the retaining element, preferably a central portion, is embedded in the body, while the retaining flanges protrude from the body.

[0027] The plug includes two sets of retaining flanges, two retaining flanges in each set being arranged radially opposite to each other, and the two sets of retaining flanges being arranged to rotate relative to each other, preferably by 90°.

[0028] The set of hooks are attached to each other by a circular retaining element which preferably has a disc shape or an annular shape and which is embedded in the body.

[0029] The hooks project from the circular retaining element and the corresponding retaining flanges project from the body.

[0030] The set of hooks of the elastic retaining means includes four hooks, each hook including a corresponding retaining flange, and all the hooks are attached to the circular retaining element so as to form two sets of radially opposite retaining flanges which are arranged to rotate relative to each other, preferably by 90°.

[0031] Each retaining flange forms an acute angle relative to the longitudinal axis of the plug.

[0032] The elastic retaining means is made of a first material, preferably a plastic or a metallic material such as stainless steel for example, and the body is made of a second material, preferably fibre cement which preferably resembles in texture and colour the material of the concrete wall containing the hole to be plugged.

[0033] These and other advantages and features of the present utility model will become apparent in view of the drawings and the detailed description of the present utility model. Description of the Drawings

[0034] Figure 1A A perspective view showing a first embodiment of a plug according to the present utility model is shown.

[0035] Figure 1B Shown is Figure 1A a side view of the plug.

[0036] Figure 1C A perspective view showing another embodiment of a plug according to the present utility model is shown.

[0037] Figure 1D Shown is Figure 1C a side view of the plug.

[0038] Figure 1E A perspective view showing another embodiment of a plug according to the present utility model is shown.

[0039] Figure 1F Shown is Figure 1E a side view of the plug.

[0040] Figure 2AIs a perspective view of a set of two hooks of the elastic retaining device according to the present utility model, the two hooks being attached by a U-shaped retaining element.

[0041] Figure 2B Is Figure 2A A front view of a set of hooks.

[0042] Figure 2C Shows a perspective view of a set of four hooks of the elastic retaining device according to the present utility model, but the four hooks are attached by a circular retaining element.

[0043] Figure 3A Shows a perspective view of another embodiment of the plug according to the present utility model.

[0044] Figure 3B Shows Figure 3A A side view of the plug.

[0045] Figure 4A Shows a perspective view of another embodiment of the plug according to the present utility model.

[0046] Figure 4B Shows Figure 4A A side view of the plug.

[0047] Figure 5A Shows a perspective view of another embodiment of the plug according to the present utility model.

[0048] Figure 5B Shows Figure 5A A side view of the plug.

[0049] Figure 5C Shows Figure 5A A side view of an embodiment of the elastic retaining device of the plug.

[0050] Figure 5D Shows Figure 5A A side view of another embodiment of the elastic retaining device of the plug.

[0051] Figure 6A Shows a perspective view of another embodiment of the plug according to the present utility model.

[0052] Figure 6B Shows Figure 6A A side view of the plug.

[0053] Figure 6C Shows Figure 6A A side view of the elastic retaining device of the plug.

[0054] Figure 6D Shows Figure 6A A perspective view of the elastic retaining device of the plug.

[0055] Figure 7A Shows a perspective view of another embodiment of the plug according to the present utility model.

[0056] Figure 7B Shows Figure 7A a side view of the plug of.

[0057] Figure 7C Shows Figure 7A a side view of the elastic retaining means of the plug of.

[0058] Figure 8A Shows a perspective view of another embodiment of the plug according to the present utility model.

[0059] Figure 8B Shows Figure 8A a perspective view of the elastic retaining means of the plug of.

[0060] Figure 8C Shows Figure 8A a side view of the plug of.

[0061] Figure 9A Shows a perspective view of another embodiment of the plug according to the present utility model.

[0062] Figure 9B Shows Figure 9A a side view of the plug of.

[0063] Figure 9C Shows Figure 9A a front view of the elastic retaining means of the plug of.

[0064] Figure 9D Shows Figure 9A a side view of a variant of the plug of, wherein the hooks of the elastic retaining means are arranged to be inclined with respect to the longitudinal axis X.

[0065] Figure 9E Shows Figure 9A a side view of another variant of the plug of, wherein the elastic retaining means includes a plurality of hooks.

[0066] Figure 10A Shows a perspective view of another embodiment of the plug according to the present utility model.

[0067] Figure 10B Shows Figure 10A a front view of the elastic retaining means of the plug of.

[0068] Figure 10C Shows Figure 10A a side view of the plug of.

[0069] Figure 11A Shows a concrete wall with holes andFigure 3A Cross-sectional view of the plug before it is inserted into the hole to be plugged.

[0070] Figure 11B Shows Figure 3A Cross-sectional view of the plug in use (i.e., inserted into the hole to be plugged). Detailed description of the preferred embodiments

[0071] Figure 1A And Figure 1B Show a first embodiment of a plug 1 according to the present invention. As shown in the figures, the plug 1 of the present invention includes a body 2 and an elastic retaining means 4. According to the present invention, the elastic retaining means 4 includes at least one hook that is partially embedded in the body 2 and partially protrudes from the body 2. The at least one hook is configured to cooperate with a hole 8 in a concrete wall 9 to hold the plug 1 in place within the hole 8. The elastic retaining means 4 may also include a plurality of hooks that protrude at least partially from the body 2. For example, in Figure 1A And Figure 1B In a non-limiting example, the elastic retaining means 4 includes four hooks that are arranged as will be described in detail below.

[0072] For example, as can be seen in Figure 11B The plug 1 is aligned with the wall or the concrete wall 9 in use (i.e., when the plug 1 is inserted into the hole 8 to be plugged), thereby covering the hole 8. Holes in the concrete wall are inevitable because most (if not all) of the holes are caused by the manufacturing process of the concrete wall 9 itself.

[0073] The plug 1 of the present invention provides for easy placement of the plug 1 in the hole 8 to be plugged in the concrete wall 9 because no additional means such as adhesives, for example, are required to hold the plug 1 in place. In addition, the fixing of the plug 1 is also improved because one or more hooks of the elastic retaining means 4 provide very good fixing whether the hole 8 to be plugged includes a plastic protection tube for a transverse bolt (fixed to plastic material) or does not include such a tube (fixed directly to the concrete).

[0074] In Figure 1A And Figure 1B In the embodiments of the present invention shown in Figure 1B Or more specifically in Figure 2BAs can be seen. Due to the configuration of these retaining flanges 4a, the plug 1 of the present utility model can be easily arranged in place, because it does not require much effort to insert the plug 1 into the hole 8 to be blocked. However, at the same time, the retaining flange 4a provides good fixation, and this fixation persists over time. Therefore, no additional devices such as adhesives are required to hold the plug of the present utility model in place.

[0075] The free end of the retaining flange 4a of the elastic retaining device 4 is arranged at a position spaced apart from the longitudinal axis X of the plug 1 by a distance d, and the distance d is larger than the radius of the hole 8 to be blocked in the concrete wall 9. Therefore, in use, when the plug 1 is arranged in the hole 8 to be blocked and preferably aligned with the concrete wall 9, the retaining flange 4a is compressed in the hole 8, as Figure 11B As can be seen. In this case, the free end of the retaining flange 4a is at a position spaced apart from the longitudinal axis X of the plug 1 by a compression distance d', and the compression distance d' is smaller than the initial distance d. That is to say, the retaining flange 4a is compressed when entering the hole 8 to be blocked, thereby increasing the fixing force of the plug 1, and this force is exerted by the retaining flange 4a on the surface of the hole 8 to be blocked. The hooks of the elastic retaining device 4 exert a very good gripping pressure independent of the inner surface of the hole 8 to be blocked; therefore, whether the hole 8 to be blocked includes a plastic protection tube for transverse bolts required in the manufacturing process of the concrete wall 9 or does not include such a tube, the retaining flange 4a of the hooks of the elastic retaining device 4 is adapted to the surface of the hole 8 to be blocked, and the plug 1 of the present utility model is firmly fixed in the hole 8 to be blocked regardless of the texture of the surface of the hole 8, whether it is plastic (if the hole includes a plastic protection tube for transverse bolts) or concrete (if the hole does not include such a plastic protection tube). In Figure 11B In the example of, the hole 8 to be blocked does not include a plastic protection tube; therefore, the hooks (i.e., the retaining flanges 4a) of the elastic retaining device 4 directly apply pressure to the concrete.

[0076] If the elastic retaining device 4 of the plug 1 of the present utility model includes a plurality of hooks, these hooks are arranged equidistantly around the longitudinal axis X of the plug 1. To facilitate the manufacture of the plug 1 of the present utility model, the elastic retaining device 4 includes a set of at least two hooks, and the at least two hooks are arranged equidistantly (preferably radially opposite to each other) around the longitudinal axis X of the plug 1 and are attached to each other by a retaining element. Each hook includes a corresponding retaining flange 4a. In Figure 2A and Figure 2BIn a non - limiting example, two retaining flanges 4a are attached to each other by a U - shaped retaining element 5. That is to say, at each end of the U - shaped retaining element 5, there extends a corresponding hook having a corresponding retaining flange 4a, thus ensuring that the plug 1 is correctly fixed within the hole 8 to be plugged. A part of the U - shaped retaining element 5 is embedded in the body 2 (preferably the central part), while the retaining flanges 4a project from the body 2. In a variant of this embodiment, the elastic retaining means 4 comprises two groups of hooks, two hooks in each group, and each hook comprises a corresponding retaining flange 4a. The two groups of hooks are arranged to be rotated relative to each other, preferably rotated by 90°.

[0077] As Figure 2B can be seen, each U - shaped retaining element 5 of each group comprises a base 5a and two legs 5b. Each leg is attached to a corresponding end of the base 5a, thus forming a single part. Each leg 5b is part of a corresponding hook. In Figure 2B the example, the legs 5b and the base 5a are attached perpendicularly. In this case, the legs 5b are arranged parallel to the longitudinal axis X of the plug 1. However, the legs 5b can form another different angle with the base 5a. In this case, the retaining flanges 4a will continue to form an acute angle α with respect to the longitudinal axis X of the plug 1.

[0078] However, in Figure 2C a non - limiting example, a group of hooks of the elastic retaining means is also arranged equidistantly around the longitudinal axis X of the plug 1, but these hooks are attached to each other by a circular retaining element 17 embedded in the body 2. The circular retaining element 17 can have a disc - shaped or annular shape. As Figure 2C shown, these hooks project from the circular retaining element 17, and the corresponding retaining flanges 4a project from the body 2.

[0079] In a preferred embodiment of this example, a group of hooks of the elastic retaining means 4 comprises four hooks, each hook comprising a corresponding retaining flange 4a. All the hooks are attached to the circular retaining element 17, thus forming two groups of radially - opposed retaining flanges 4a. The two groups of retaining flanges 4a are arranged to be rotated relative to each other, preferably rotated by 90°.

[0080] The retaining flanges 4a can form an acute angle with respect to the longitudinal axis X of the plug, or they can be perpendicular to the longitudinal axis X, as will be described in further detail below.

[0081] Figure 1A , Figure 3A and Figure 4A The retaining flanges 4a of the hooks of the plug in the examples of

[0082] In a preferred embodiment of the present utility model, the body 2 includes a frustoconical or cylindrical head 6. The body 2 includes an acting surface 15 which, in this embodiment, is arranged at one end of the head 6 and, in use, is aligned with the uncovered surface 9a of the wall or the concrete wall 9 so as to cover the corresponding hole 8. In the context of the present utility model, the uncovered surface 9a refers to the visible surface of the concrete wall 9. The acting surface 15 is preferably perpendicular to the longitudinal axis X of the plug 1. The body 2 further includes an auxiliary surface 16 which, in use, is arranged within the hole 8 in the concrete wall 9 and from which the elastic retaining means 4 projects.

[0083] In one embodiment of the present utility model, the auxiliary surface 16 faces the acting surface 15 and the hooks of the elastic retaining means 4 project axially from the body 2 along the insertion direction A, that is, axially from the auxiliary surface 16 which is the front surface of the head 6, as Figure 1A shown. In another embodiment of the present utility model, the auxiliary surface 16 is the side surface of the head 6, that is, the generatrix of the frustoconical head 6 or the conical head 6, and the hooks of the elastic retaining means 4 project directly radially from the body 2 (that is, perpendicular to the longitudinal axis X), as will be described in detail below. In Figure 1A the example, the shape of the head 6 is cylindrical, while in Figure 1C and Figure 1E the example, it is frustoconical.

[0084] In another embodiment of the present utility model, the body 2' further includes a frustoconical or cylindrical base 7 from which the head 6 extends axially along the insertion direction A, for example, as Figure 3B visible. The head 6 includes a diameter smaller than the minimum diameter of the base 7. In this embodiment, the acting surface 15 of the body 2' is arranged at one end of the base 7 and, in use, this acting surface is aligned with the uncovered surface 9a of the concrete wall 9. The acting surface 15 is also preferably perpendicular to the longitudinal axis X of the plug 1' and, as described above, the hooks of the elastic retaining means 4 (in particular the retaining flange 4a) project from the auxiliary surface 16 of the head 6, that is, axially from the front surface of the head 6 or the side surface of the head 6. Figure 3A 、 Figure 3B 、 Figure 4A or Figure 4B show examples of plugs including the body 2' which includes the head 6 and the base 7.

[0085] In these embodiments, i.e., in the embodiments in which the body 2' includes a head 6 and a base 7, the retaining flange 4a can form an acute angle α with respect to the longitudinal axis X of the plug of the present utility model, and the elastic retaining means 4 can also include at least one set of two hooks which are arranged to be diametrically opposite to each other and are attached to each other by a U-shaped retaining element 5. Preferably, the elastic retaining means includes two sets of hooks, two hooks in each set, and these two sets of hooks are arranged to be rotated relative to each other, preferably rotated 90°.

[0086] These embodiments, i.e., the embodiments in which the body 2' includes both a head 6 and a base 7, are particularly advantageous when the hole 8 in the concrete wall 9 has a narrow frustoconical opening 8'. As is known to those skilled in the art, the protection kit for the lateral bolts in the concrete wall manufacturing process can include a central cylindrical section (a cylindrical protection tube made of plastic), and frustoconical elements made of plastic are added at each end of this section. Once the concrete solidifies, these frustoconical elements will be removed. Therefore, as Figure 11A can be seen, the hole 8 formed in the concrete wall 9 will have two frustoconical openings 8' (made of concrete), which are arranged at the ends of the hole 8, and a cylindrical section 8'' (made of plastic if the protection tube is not removed, and made of concrete if the protection tube has been removed) is arranged between these two frustoconical openings. Generally, only one of the frustoconical openings 8' of the hole 8 (the frustoconical opening 8' arranged in the uncovered surface 9a of the concrete wall 9) is blocked. Therefore, in this specification, only the hole 8 in which the frustoconical opening 8' is arranged in the uncovered surface 9a of the concrete wall 9 will be referred to. However, if both openings are to be blocked, the same blocking will be carried out at both ends of the hole 8. To better understand the present utility model, Figure 11A and Figure 11B illustrates the hole 8 with a frustoconical opening 8' (the second opening is omitted). Depending on the shape of the frustoconical opening 8' of the hole 8 to be blocked, it will be appropriate to use one plug (without a base 7) or another plug (with a base 7) to ensure better fixing of the plug. For example, in the case where the frustoconical section of the frustoconical opening 8' of the hole 8 is very narrow (not very deep), it is recommended to use plugs 100, 101, 110, 111, 120, 121, 122, 122', 122'' or 123 including a body 2' with a base 7 (according to any of its variants). In other cases, i.e., if the frustoconical section of the frustoconical opening 8' of the hole 8 to be blocked is deep enough, plugs 1, 1' or 1'' including a body 2 without a base 7 and plugs 100, 101, 110, 111, 120, 121, 122, 122', 122'' or 123 including a base 7 can be used.

[0087] In these embodiments (i.e., the embodiments in which the body 2' includes the head 6 and the base 7), the base 7 can be adjusted according to the shape of the frustoconical opening 8' of the hole 8 such that when the base 7 abuts against the bottom of the frustoconical opening 8', the acting surface 15 of the body 2' is aligned with the uncovered surface 9a of the concrete wall 9.

[0088] Furthermore, in this embodiment in which the body 2' includes the head 6 and the base 7, the head 6 and the base 7 form a single part.

[0089] Figure 5A and Figure 5B Another embodiment of the plug 110 of the present utility model is shown, in which the only change with respect to the described plug is the elastic retaining means 4. In this case, the body 2' includes the head 6 and the base 7, and the elastic retaining means 4 includes a single hook, as can be seen for example in Figure 5C which shows that the single hook includes a single conical retaining flange 4a and a stem 10. The retaining flange 4a is attached to the stem 10, which is arranged on the geometric axis of the retaining flange 4a, and a part of the stem 10 is embedded in the body 2' such that the stem 10 is arranged parallel to or aligned with the longitudinal axis X, and the hook projects axially from the body 2' along the insertion direction A. For example, the stem 10 can be a rod or a rod with a helical insertion part. As Figure 5C can be seen, the elastic retaining means 4 of this embodiment is similar to an open umbrella, and the retaining flange 4a forms an acute angle α with respect to the longitudinal axis X of the plug. In order to improve the bonding force of the stem 10 in the body 2', the stem 10 can include a stop 12 (as Figure 5D can be seen) preferably arranged perpendicular to the stem 10 at the end farthest from the vertex 11 of the hook or include a helical part, thereby improving the clamping between the stem 10 and the body 2'.

[0090] Figure 7A , Figure 7B and Figure 7CAnother variant of the plug 120 of the present utility model shown in the figure differs from the above-mentioned plug 110 in the shape of the elastic retaining device 4. The elastic retaining device 4 of this variant also includes a single hook having a single retaining flange 4a, but in this case, the hook is circular. The retaining flange 4a can be arranged perpendicular to the longitudinal axis X or inclined with respect to the longitudinal axis X. The retaining flange 4a is also attached to a rod portion 10 arranged on its geometric axis, and a part of the rod portion 10 is embedded in the main body 2', so that the rod portion 10 is arranged parallel to the longitudinal axis X or aligned with the longitudinal axis X, and the hook of the elastic retaining device 4 axially protrudes from the main body 2' along the insertion direction A. As in the above example, the rod portion 10 can be a rod or a rod with a helical embedding portion. When the plug 120 is introduced into the hole 8 to be blocked, the retaining flange 4a is bent, and the retaining flange 4a is compressed inside the hole 8 to be blocked, so that the retaining flange exerts a continuous pressure on the inner surface of the hole 8.

[0091] To facilitate the bending of the circular retaining flange 4a, the retaining flange may optionally include at least one notch 14 arranged at the distal end of the retaining flange 4a, and the notch 14 preferably extends in the radial direction of the circular retaining flange 4a. In Figure 8A , Figure 8B and Figure 8C In the example of the plug 121, the circular retaining flange 4a includes a plurality of radial notches 14 uniformly distributed along the outer circumference of the retaining flange 4a.

[0092] Figure 6A and Figure 6B Another variant of the plug 111 of the present utility model shown in the figure differs from the above-mentioned plugs 110, 120 and 121 in the shape of the elastic retaining device 4. The elastic retaining device 4 of this variant also includes a single hook, and the single hook includes a single retaining flange 4a, but in this case, it is in the form of a frustum-shaped ring, so it forms a peripheral skirt. As Figure 6D shown, the hook also includes a support member 13 in the shape of a circular ring or a disc. The end of the retaining flange 4a with a smaller size is attached to the support member 13, and at least a part of the support member 13 is embedded in the main body 2'. The support member 13 is arranged transversely to the longitudinal axis X, so that the hook protrudes radially from the main body 2', preferably radially from the head 6 of the main body 2', as Figure 6B visible in the figure. In one variant, the embedded part of the hook is fixed to a rod or a spiral bolt (not shown in the figure), and the rod or the spiral bolt is also embedded in the main body 2'. The rod or the spiral bolt embedded in the main body 2' is preferably arranged along the longitudinal direction of the main body 2'.

[0093] As Figure 6B or Figure 6C shown, the retaining flange 4a forms an acute angle α with respect to the longitudinal axis X of the plug. In addition, asFigure 6B As can be seen in [reference], the free end of the retaining flange 4a remains arranged at a distance d from the longitudinal axis X of the plug 111, the distance d being greater than the radius of the hole 8 to be plugged in the concrete wall 9.

[0094] Figure 9A 、 Figure 9B and Figure 9C Another variant of the plug 122 of the present invention as shown in [reference] differs from the above-mentioned plug 111 in the shape of the elastic retaining means 4. The elastic retaining means 4 of this variant also comprises a single hook with a single retaining flange 4a, but in this case the elastic retaining means 4 is in the form of an annulus (as can be seen in [reference]) or a disc, which projects radially from the body 2' of the plug 122, preferably from the head 6, such that the retaining flange 4a is arranged perpendicular to the longitudinal axis X of the plug 122. As can be seen in [reference], the free end of the retaining flange 4a remains arranged at a distance d from the longitudinal axis X of the plug 122, the distance d being greater than the radius of the hole 8 to be plugged in the concrete wall 9. In the variant shown in [reference], the annulus or disc of the elastic retaining means 4 of the plug 122' is arranged inclined with respect to the longitudinal axis X instead of being arranged perpendicular to the longitudinal axis X. Figure 9C As can be seen in [reference], the free end of the retaining flange 4a remains arranged at a distance d from the longitudinal axis X of the plug 122, the distance d being greater than the radius of the hole 8 to be plugged in the concrete wall 9. In Figure 9B As can be seen in [reference], the free end of the retaining flange 4a remains arranged at a distance d from the longitudinal axis X of the plug 122, the distance d being greater than the radius of the hole 8 to be plugged in the concrete wall 9. In Figure 9D In the variant shown in [reference], the annulus or disc of the elastic retaining means 4 of the plug 122' is arranged inclined with respect to the longitudinal axis X instead of being arranged perpendicular to the longitudinal axis X.

[0095] In this embodiment, the elastic retaining means 4 does not need to include an additional support to allow attachment to the body 2', since a part of the annulus (preferably the part with a smaller diameter) or the disc is embedded in the body 2', as can be seen in [reference]. When the plug 122 is introduced into the hole 8 to be plugged, the retaining flange 4a is bent and the retaining flange 4a is compressed inside the hole 8 to be plugged, so that the retaining flange exerts a continuous pressure on the inner surface of the hole 8. Figure 9A As can be seen in [reference]. When the plug 122 is introduced into the hole 8 to be plugged, the retaining flange 4a is bent and the retaining flange 4a is compressed inside the hole 8 to be plugged, so that the retaining flange exerts a continuous pressure on the inner surface of the hole 8.

[0096] To facilitate bending of the retaining flange 4a in the form of an annulus, the retaining flange may optionally further comprise at least one notch 14, which is arranged at the distal end of the retaining flange 4a. In the examples of the plug 123 in [reference] and [reference], the retaining flange 4a comprises a plurality of radial notches 14 uniformly distributed along the outer circumference of the retaining flange 4a. The notches 14 extend radially, as can be seen in [reference]. Figure 10A and Figure 10B In the examples of the plug 123 in [reference] and [reference], the retaining flange 4a comprises a plurality of radial notches 14 uniformly distributed along the outer circumference of the retaining flange 4a. The notches 14 extend radially, as can be seen in [reference]. Figure 10B As can be seen in [reference]. Figure 10C Shows Figure 10A a side view of the plug.

[0097] In Figures 1C to 1F the embodiment of [reference], the bodies 2 of the plugs 1' and 1" do not include a base 7, and in this case the frustoconical head 6 is larger than Figure 1AThe head 6 of the plug 1 (which does include the base 7) is long. These plugs 1' and 1" are suitable for use when the holes 8 formed in the concrete wall 9 are conical or frustoconical along their entire length.

[0098] Unlike Figure 1A the embodiment of the plug 1 (excluding the base 7) in which the elastic retaining means 4 projects axially from the body 2, in Figures 1C to 1F the plugs 1' and 1", the elastic retaining means 4 projects from the body 2 in a direction perpendicular to the longitudinal axis X.

[0099] Figure 1C and Figure 1D In the embodiment of the plug 1' of Figure 6A the elastic retaining means 4 comprises a single hook which includes a single retaining flange 4a in the form of a frustoconical ring such that it forms a peripheral skirt, as described for Figure 1D the plug 111 of

[0100] The hook also includes a support 13 in the form of a ring or a disc. The end of the retaining flange 4a having a smaller size is attached to the support 13, and at least a part of the support 13 is embedded in the body 2'. As

[0101] Figure 1E and Figure 1F In the embodiment of the plug 1" of Figure 9A the elastic retaining means 4 is different from that of the above-mentioned plug 1' in the shape of the elastic retaining means 4. As in Figure 1F the case of the plug 122 of Figure 1FAs can be seen, the free end of the retaining flange 4a remains arranged at a distance d from the longitudinal axis X of the plug 1", and the distance d is greater than the radius of the hole 8 to be plugged in the concrete wall 9. Optionally, the embedded part of the loop or disc of the hook can be fixed to a rod or a stud (not shown in the figure), and the rod or stud is also embedded in the body 2. The rod or stud embedded in the body 2 is preferably arranged along the longitudinal direction of the body 2.

[0102] In a variant not shown in the figures, the loop or disc is arranged to be inclined relative to the longitudinal axis X instead of being arranged perpendicular to the longitudinal axis X. When the plug 1" is introduced into the hole 8 to be plugged, the retaining flange 4a is bent, and the retaining flange 4a is compressed within the hole 8 to be plugged, so that the retaining flange exerts a continuous pressure on the inner surface of the hole 8.

[0103] To facilitate bending of the retaining flange 4a in the form of a loop or disc, the retaining flange may also optionally include the above-mentioned notch 14.

[0104] Optionally, in other variants of the embodiments including hooks (which include a single retaining flange 4a protruding from the head 6 in a direction perpendicular to the longitudinal axis X), whether they include the notch 14 or whether they are arranged perpendicular or inclined relative to the longitudinal axis X, the elastic retaining means 4 may include more than one hook, and the retaining flanges 4a of each hook are spaced apart from each other in the direction of the longitudinal axis X. The free ends of the retaining flanges 4a of the plurality of hooks may be arranged at the same distance d from the longitudinal axis X, or the distance d may decrease according to the insertion direction A as the retaining flange 4a approaches the free end of the corresponding plug head 6. Figure 9E An example of these variants is shown.

[0105] In Figure 9E (which corresponds to the plug 122" having a body 2' including both a head 6 and a base 7), the elastic retaining means 4 includes three hooks, each hook including a retaining flange 4a in the shape of a loop or disc, and in this case, the retaining flange projects radially from the head 6. The retaining flanges 4a are arranged parallel to each other and spaced apart from each other in the direction of the longitudinal axis X. In this example, the free ends of all the retaining flanges 4a are arranged at the same distance d from the longitudinal axis X.

[0106] The head 6 of the body includes a length L such that one or more hooks protruding from the side surface of the head 6 according to any of the above embodiments are axially placed within the length L. In this configuration, the plug of the present utility model is more robust and reliable because the void core in the elastic retaining means 4 is avoided, that is, the cantilever hook is avoided, and the cantilever hook will weaken the plug over time.

[0107] Figure 11B shows Figure 3A and Figure 3B a cross-sectional view of a plug 100 of an embodiment (an embodiment in which the body 2' includes a base 7) that is introduced into a hole 8 to be plugged. As shown in the figure, the retaining flange 4a is compressed, and a continuous pressure is exerted on the inner surface of the hole 8 (in this case, on the inner surface of the cylindrical section 8'') that persists over time. In Figure 11A and Figure 11B the shape of the retaining flange 4a before and after introducing the plug 100 into the hole 8 to be plugged can be seen. As Figure 11B shown, the base 7 (according to any of its variants) is disposed within the cylindrical section 8'' of the hole 8 in the concrete wall 9. In this case, before introducing the plug 100 into the hole 8, the distance d of the retaining flange 4a from the longitudinal axis X of the plug 100 is greater than the radius of the cylindrical section 8'' of the hole 8 in the concrete wall 9. If the plug of the present utility model is held in the frustoconical opening 8' of the hole 8 by the retaining flange 4a (such as the plug 1 of an embodiment without a base 7), then before introducing the plug 1 into the hole 8, the distance d of the retaining flange 4a from the longitudinal axis X of the plug 1 is greater than the radius of the annular portion of the frustoconical opening 8' that corresponds to the position where the plug 1 is aligned with the concrete wall 9.

[0108] According to any of the above embodiments, the elastic retaining means 4 and the body 2 or 2' of the plug of the present utility model are made of different materials, the elastic retaining means 4 is made of a first material, and the body 2 or 2' is made of a second material. The first material is a plastic or metallic material, preferably stainless steel, and the second material is fiber cement that is preferably similar in texture and color to the material of the concrete wall 9 containing the hole 8 to be plugged.

Claims

1. A plug for closing holes in a concrete wall, the plug comprising a body and an elastic retaining means, wherein, The elastic retaining device includes at least one hook, which is partially embedded in the body and partially projects from the body. The at least one hook is configured to cooperate with the hole in the concrete wall to hold the plug in the hole. Wherein each of the at least one hook includes a retaining flange, and the free end of the retaining flange is located at a distance from the longitudinal axis of the plug, and the distance is greater than the radius of the hole to be blocked in the concrete wall, so that in use, when the plug is arranged in the hole to be blocked, the retaining flange is compressed in the hole, and wherein the at least one hook includes at least two hooks arranged equidistantly around the body. Characterized in that the retaining flanges of the corresponding hooks of the at least two hooks are attached to each other by a U-shaped retaining element, and a part of the U-shaped retaining element is embedded in the body while the retaining flanges project from the body.

2. The plug for closing a hole in a concrete wall according to claim 1, characterized in that, The body includes a cylindrical or frustoconical head, and the at least one hook projects directly from the side surface of the head.

3. The plug for closing a hole in a concrete wall according to claim 2, characterized in that, The head of the body includes a length within which the at least one hook is placed.

4. The plug for closing a hole in a concrete wall according to claim 1, characterized in that, The body includes a cylindrical or frustoconical head, and the at least one hook projects axially from the front surface of the head.

5. The plug for closing a hole in a concrete wall according to claim 2 or 4, characterized in that, The body further includes a base, and the head of the body extends axially from the base, and the head has a diameter smaller than the diameter of the base.

6. The plug for closing a hole in a concrete wall according to claim 2 or 4, characterized in that, The body further includes a base, and the head of the body extends axially from the base, and the head and the base form a single part.

7. The plug for closing a hole in a concrete wall according to claim 1, characterized in that, The central part of the U-shaped retaining element is embedded in the body.

8. The plug for closing a hole in a concrete wall according to claim 1, characterized in that, The retaining flanges of the at least two hooks include two sets of retaining flanges, with two retaining flanges in each set arranged radially opposite to each other, and the two sets of retaining flanges are arranged rotationally relative to each other.

9. The plug for closing a hole in a concrete wall according to claim 8, characterized in that, The two sets of retaining flanges are arranged to rotate 90° relative to each other.

10. The plug for closing a hole in a concrete wall according to claim 1, characterized in that, Each retaining flange forms an acute angle with the longitudinal axis of the plug.

11. The plug for closing a hole in a concrete wall according to claim 1, characterized in that, The elastic retaining device is made of a first material, and the body is made of a second material.

12. The plug for closing a hole in a concrete wall according to claim 11, characterized in that, The first material is a plastic or metal material, and the second material is fiber cement.

13. The plug for closing a hole in a concrete wall according to claim 12, characterized in that, The fiber cement is similar in texture and color to the material of the concrete wall containing the hole to be blocked.

14. A plug for closing a hole in a concrete wall, the plug comprising a body and an elastic retaining means, wherein, The elastic retaining device includes at least one hook, which is partially embedded in the body and partially projects from the body. The at least one hook is configured to cooperate with the hole in the concrete wall to hold the plug in the hole. Wherein each of the at least one hook includes a retaining flange, and the free end of the retaining flange is located at a distance from the longitudinal axis of the plug, and the distance is greater than the radius of the hole to be blocked in the concrete wall, so that in use, when the plug is arranged in the hole to be blocked, the retaining flange is compressed in the hole, and wherein the at least one hook includes a group of hooks, and the group of hooks includes at least two hooks arranged equidistantly around the body. Characterized in that, the set of hooks are attached to each other by a circular retaining element, and the circular retaining element is embedded in the body.

15. The plug for closing a hole in a concrete wall according to claim 14, characterized in that, The circular retaining element has a disc shape or an annular shape.

16. The plug for closing a hole in a concrete wall according to claim 14, characterized in that, The at least two hooks project from the circular retaining element, and corresponding retaining flanges project from the body.

17. The plug for closing a hole in a concrete wall according to claim 14, characterized in that, The set of hooks of the elastic retaining device includes four hooks, and all the hooks are attached to the circular retaining element, thereby forming two sets of radially opposite retaining flanges, and the two sets of retaining flanges are arranged in a rotational manner relative to each other.

18. The plug for closing a hole in a concrete wall according to claim 17, characterized in that, The two sets of retaining flanges are arranged in a rotational manner by 90° relative to each other.

19. The plug for closing a hole in a concrete wall according to claim 14, characterized in that, Each retaining flange forms an acute angle relative to the longitudinal axis of the plug.

20. The plug for closing a hole in a concrete wall according to claim 14, characterized in that, The elastic retaining device is made of a first material, and the body is made of a second material.

21. The plug for closing a hole in a concrete wall according to claim 20, characterized in that, The first material is a plastic or metallic material, and the second material is fiber cement.

22. The plug for closing a hole in a concrete wall according to claim 21, characterized in that, The fiber cement is similar in texture and color to the material of the concrete wall containing the hole to be blocked.

23. The plug for closing a hole in a concrete wall according to claim 14, characterized in that, The body includes a cylindrical or frustum-conical head, and the at least one hook projects directly from the side surface of the head.

24. The plug for closing a hole in a concrete wall according to claim 23, characterized in that, The head of the body includes a length, and the at least one hook is placed within the length.

25. The plug for closing a hole in a concrete wall according to claim 14, characterized in that, The body includes a cylindrical or frustum-conical head, and the at least one hook projects axially from the front surface of the head.

26. The plug for closing a hole in a concrete wall according to claim 23 or 25, characterized in that, The body further includes a base, the head of the body extends axially from the base, and the head has a diameter smaller than the diameter of the base.

27. The plug for closing a hole in a concrete wall according to claim 23 or 25, characterized in that, The body further includes a base, the head of the body extends axially from the base, and the head and the base form a single component.

Images