KAINULAINEN, Jani (Säihkekatu 3, Lahti, FI-15340, FI)
SUUR-ASKOLA, Petri (Posteljooninkatu 41, Lahti, FI-15160, FI)
KAINULAINEN, Jani (Säihkekatu 3, Lahti, FI-15340, FI)
| Claims 1. A case (1 ) for a cable loop going into a concrete structure, through which case (1 ) the part of the cable loop anchored in the concrete struc- ture extends as the part exterior to the concrete structure, which case (1 ) comprises a planar bottom surface (2) and at least one wall part (3, 3.1 , 3.2) rising from the bottom surface (2), characterized in that the wall part (3, 3.1 , 3.2) comprises one or more attachment surfaces (4, 4.1 , 4.2), which attachment surface (4, 4.1 , 4.2) is substantially in the direction of the bottom surface (2) and from which one or more attachment surfaces (4, 4.1 , 4.2) the wall part (3, 3.1 , 3.2) extends away from the bottom surface (2). 2. A case (1 ) according to claim 1 , characterized in that the wall part (3, 3.1 , 3.2) forms together with the attachment surface (4, 4.1 , 4.2) at least one elongated projection, which extends in the longitudinal direction of the case (1 ) such that the projection forms at least two attachment surfaces (4, 4.1 , 4.2), between which said attachment surfaces (4, 4.1 , 4.2) there is at least one wall part (3, 3.1 , 3.2). 3. A case (1 ) according to claim 2, characterized in that at least one attachment surface (4, 4.1 , 4.2) is formed at least partially from the bottom surface (2). 4. A case (1 ) according to any one of claims 1-3, characterized in that the wall parts (3, 3.1 , 3.2) rising from the two opposite sides of the bottom surface (2) of the case (1) have one or more attachment surfaces (4, 4.1 , 4.2). 5. A case ( ) according to any one of claims 1-4, characterized in that the wall part (3, 3.1 , 3.2) ends at a shoulder surface (5), which is substantially parallel with the attachment surface (4, 4. , 4.2). 6. A case (1 ) according to any one of claims 1-5, characterized in that the wall part (3. ) rising from the bottom surface (2) and the wall part (3.2) extending from the attachment surface (4) are substantially parallel. 7. A case (1 ) according to any one of claims 1-6, characterized in that the case (1 ) is symmetrical in cross-section, in which opposite wall parts (3.1 ) rising from the bottom surface (2) are further apart from each other than opposite wall parts (3.2) extending from the attachment surface (4). 8. A case (1 ) according to any one of claims 1-7, characterized in that the case ( ) is detachable from the concrete structure. 9. A case (1 ) according to any one of claims 1-8, characterized in that the bottom surface (2) forms a rectangle, from at least the other shorter side of which rises an end part (6). 10. A case (1 ) according to any one of claims 1-9, characterized in that an end surface (7) is arranged between the bottom surface (2) and the attachment surface (4). 11. A case (1 ) according to claim 10, characterized in that the end surface (7) is essentially as wide as the attachment surface (4). 12. A case (1 ) according to any one of claims 1-11 , characterized in that an end surface (7) is arranged between the two or more attachment surfaces (4) in the wall part (3). 13. A method for arranging a cable loop in a concrete structure, in which into the concrete structure is arranged a case (1 ) to separate the part of the cable loop anchored in the concrete structure from the part of the cable loop exterior to the concrete structure, which case (1 ) is formed from one continuous piece such that there is formed a bottom surface (2) and one or more wall parts (3, 3.1 , 3.2) rising from the bottom surface (2), characterized in that to the wall part (3, 3.1 , 3.2) is formed one or more attachment surfaces (4, 4.1 , 4.2), which attachment surface (4, 4.1 , 4.2) is substantially in the direction of the bottom surface (2) and from which attachment surface (4, 4.1 , 4.2) the wall part (3, 3.1 , 3.2) is arranged to extend away from the bottom surface (2). 14. The use of an attachment surface (4, 4.1 , 4.2) in a case (1 ) to an- chor the case (1 ) in a concrete structure. |
Background of the invention
The invention relates to a case according to the preamble of claim
1 for a cable loop going into a concrete structure, through which case the part of the cable loop anchored in the concrete structure extends as the part exterior to the concrete structure, which case comprises a planar bottom surface and at least one wall part rising from the bottom surface. The invention also relates to a method according to the preamble of claim 11 for arranging a cable loop in a concrete structure, in which a case is arranged in the concrete structure to separate the part of the cable loop anchored in the concrete structure from the part exterior to the concrete structure, which case is formed from one continuous piece such that there is formed a bottom surface and one or more wall parts rising from the bottom surface. The invention also relates to the use according to claim 12 of an attachment surface in a case.
From WO 2010/018300 A1 is known a dowel loop, to which belongs a case to be installed in seams to be post-cast between walls and other reinforced concrete elements and a cable loop to be attached to the case. In the case presented in the publication, the walls are obliquely bent in order to achieve a better grip in the concrete.
WO 98/03751 presents a case for a cable loop, which case remains permanently attached to the concrete structure. The case pre- sented in the publication comprises a bottom surface and side walls rising from the bottom surface, which are arranged essentially perpendicularly to the bottom surface rising directly upwards and which walls are straight in shape.
However, the problem with the cases presented above is that, as the concrete element is cast, concrete is fed under high pressure and, in this case, it is difficult to get a case having straight walls to attach properly into the casting. The cases often have a lid thereon to protect the cable loop inside the case and after casting, when the lid is opened and the cable loop is turned outward from the case, the case may be able to move and even to rise out from the cast concrete, wherein it detaches entirely from the base. Thus, the problem is the inadequate adhesion and grip of the case in the base. Brief description of the invention
The object of the invention is to solve above said problems.
The object of the invention is achieved by a case according to independent claim 1. The invention also relates to a method according to independent claim 11 for arranging a cable loop in a concrete structure. The invention further relates to the use according to independent claim 12 of an attachment surface in a case. The preferred embodiments of the invention are presented in the dependent claims.
The object of the invention is to provide a case for a cable loop going into a concrete structure and a method for arranging the cable loop into the concrete structure as well as the use of an attachment surface in the case, by which the disadvantages of prior known art can be removed. Though a case according to the invention, the part of the cable loop anchored in the concrete structure extends as the part exterior to the concrete structure, which case comprises a planar bottom surface and at least one wall part rising from the bottom surface. A case according to the invention is characterized in that the wall part comprises one or more attachment surfaces, which attachment surface is substantially in the direction of the bottom surface and from which one or more attachment surfaces the wall part extends away from the bottom surface. In the method, a case is arranged in the concrete structure to separate the part of the cable loop anchored in the concrete structure from the part of the cable loop exterior to the concrete structure, which case is formed from one continuous piece such that there are formed a bottom surface and one or more wall parts rising from the bottom surface. A method according to the invention is characterized in that to the wall part is formed one or more attachment surfaces, which attachment surface is substantially in the direction of the bottom surface and from which attachment surface the wall part is arranged to extend away from the bottom surface. According to the invention, the attachment surface in the case is used to anchor the case in the concrete structure. To the case according to the invention is arranged one or more attachment surfaces, which is substantially parallel with the bottom surface of the case and through which the cable loop travels from the concrete structure to its exterior. The part of the cable loop exterior to the concrete structure is arranged inside the case, from which it can be turned outwards. The case is arranged in the concrete structure such that it goes on or near the surface of the concrete structure. The case is ordinarily placed in the concrete structure such that the bottom surface of the case is preferably in the concrete structure in the direction of the surface, on or near which the case is arranged. The one or more attachment surfaces arranged to the wall part of the case can remain below the surface of the concrete structure, i.e. inside the concrete structure or portion of the attachment surfaces can remain below the surface and portion can come to the surface or above the surface. In other words, portion of the attach- ment surfaces can be inside the concrete structure such that they are not visible from the outside and portion of the attachment surfaces can be visible in the concrete structure. There can be one or more attachment surfaces in one wall part of the case, but essential to achieving good adhesion of the attachment surface is that the attachment surface travels in the concrete structure preferably in the direction of the surface, on or near which the case is arranged.
A case according to the invention can be permanently arranged in the concrete structure or it can be detachable from the concrete structure.
By the preferred embodiment of a case according to the invention, the advantage is achieved that one or more attachment surfaces keep the case in place more securely in the concrete structure, nor will it spring out from the concrete structure, when the cable loop inside the case is taken out. List of figures
In the following, some preferred embodiments of the invention are presented in more detail with reference to the accompanying drawings, in which Fig. 1 shows a preferred embodiment of a case according to the invention,
Fig. 2 shows a cross-section of the case in Fig. 1 , and
Fig. 3 shows another embodiment of a case according to the invention as a cross-section.
Detailed description of the invention
Fig. 1 shows a case 1 according to the invention for a cable loop going in a concrete structure. The case 1 comprises a bottom surface 2, from which rises a wall part 3, which comprises an attachment surface 4. In this example, a wall part 3 is arranged to both of the long sides of the case 1 , which wall part 3 has one attachment surface 4. The wall part 3 ends at a shoulder surface 5, the purpose of which is to keep the cable loop remaining inside the case 1 in place and to prevent it from springing out. The bottom surface 2 of the case 1 forms preferably a rectangle, from at least the other shorter side of which rises an end part 6. In this embodiment of the invention, the end part 6 is arranged at only the other end of the case 1. At the opposite end from the end part 6, to the case 1 are arranged end surfaces 7, which are, in this case, arranged to extend to the space defined by the attachment surface 4 and the bottom surface 2 as well as the wall part 3 between these. In other words, the end surface 7 is arranged between the bottom surface 2 and the attachment surface 4. In this embodiment, the end surface 7 is essentially as wide as the attachment surface 4, i.e. a part of the end of the case 1 remains open. In another embodiments of the invention, the case 1 can comprise only the wall parts 3 on the longitudinal sides of the case 1 or, in addition to the wall parts 3, to the case 1 can be arranged on both short sides of the case 1 end parts 6 or end surfaces 7, which end surface 7 can be arranged either to both wall parts 3 or to only the other. The end surface 7 is preferably arranged to the case such that it is attached either to the wall part 3 or the bottom surface 2, from which it is bent into place. The end part 6 is also preferably attached to the bottom surface 2, from which it is bent into place. In this case, the case 1 is composed of one part, from which can be formed, by bending, a case 1 according to the invention. According to Fig. 1 , the wall part 3 has an attachment surface 4, which extends over the entire length of the wall part.
Fig. 2 shows a cross-section of the case 1 shown in Fig. 1. The case 1 is symmetrical in cross-section such that opposite wall parts 3.1 rising from the bottom surface 2 are further from each other than opposite wall parts 3.2 extending from the attachment surface 4. In this embodiment, the wall parts 3 rising from the two opposite sides of the bottom surface 2 of the case 1 have only one attachment surface 4. The wall part 3 ends at the shoulder surface 5, which is substantially parallel with the attachment surface 4. As is shown in the figure, the wall part 3.1 rising from the bottom surface 2 and the wall part 3.2 extending from the attachment surface 4 are substantially parallel. The attachment surface 4 is also substantially in the direction of the bottom surface 2. Although the cross-section shown in the figure is symmetrical, the invention is not lim- ited to only symmetrical cases, rather the attachment surfaces 4 can be on different sides of the case 1 of different sizes or at different levels. According to Fig. 2, the case 1 has a wall part 3 having an attachment surface that forms the first attachment surface 4 such that there is a first wall part 3.1 between the bottom surface 2 and the first attachment surface 4 and such that to the first attachment surface 4 is connected the second wall part 3.2. The first attachment surface 4 and the bottom surface 2 are substantially parallel, and the first wall part 3.1 and the second wall part 3.2 are substantially parallel. The first attachment surface 4 extends preferably over the entire length of the wall part 3, wherein the first and sec- ond wall parts 3.1 , 3.2 extend over the entire length of the wall part 3.
Fig. 3 shows in cross-section another embodiment of a case 1 according to the invention, in which the wall parts 3 rising from the two opposite sides of the case 1 have two attachment surfaces 4.1 , 4.2. In different embodiments, there can also be more attachment surfaces 4 than two per wall part 3. In a case 1 according to the figure, from the bottom surface 2 rises the first wall part 3.1 , which ends at the first attachment surface 4.1 , which is substantially perpendicular or nearly perpendicular in relation to the first wall part 3.1. In this example, the first attachment surface 4.1 extends substantially away from the centre part of the case to the point, in which the second wall part 3.2, which is substantially parallel with the first wall part 3.1 , extends away from the bottom surface 2 of the case 1. The second wall part 3.2 ends at the second attachment surface 4.2, which is substantially of the size same as the first attachment surface 4.1 and is located on the first attachment surface 4.1. From the second attachment surface 4.2, the wall part 3 extends as a third wall part 3.3, which is substantially parallel with the first wall part 3.1 and, in this example, located on the same imaginary longitudinal axis. The wall part 3 of the case 1 finally ends at the shoulder surface 5. A case 1 according to this embodiment can have similar end parts 6 or end surfaces 7 as the case 1 according to Fig. 1. Between the two or more attachment surfaces 4 in the wall part 3 can be arranged an end surface 7. In this case, the end surfaces can be arranged to the space between the two attachment surfaces 4.1 and 4.2 and, in addition to this, an end part 6 can be arranged to rise from the bottom surface 2. According to Fig. 3, case 1 has a wall part 3, which has two attachment surfaces 4, which form the first attachment surface 4.1 and the second attachment surface 4.2 such that there is the first wall part 3.1 between the bottom surface 2 and the first attachment surface 4.1 and the second wall part 3.2 between the first attachment surface 4.1 and the second attachment surface 4.2 , and that to the second attachment surface 4.2 is connected the third wall part 3.3. The first and second attachment surface 4.1 , 4.2 are substantially parallel, and the first wall part 3.1 , the second wall part 3.2 and the third wall part 3.3 are substantially parallel. According to the preferred embodiment, the first and second attachment surfaces 4.1 , 4.2 extend over the entire length of the wall part 3 and the first wall part 3.1 , the second wall part 3.2 and the third wall part 3.3 extend over the entire length of the wall part 3.
According to the figures presented above, the case 1 can comprise one or more attachment surfaces 4, which attachment surface forms to the case 1 a projection away from the case 1. In other words, the actual wall parts 3 of the case 1 define the actual case portion of the case , into which the cable loop settles, wherein said one or more attachment surfaces 4 push outwards from this case portion towards the surrounding concrete or into that space, into which the concrete is intended to be arranged. According to the preferred embodiment, the case 1 comprises at least one elongated projection, which extends in the longitudinal direction of the case, which projection is formed from at least two attachment surfaces 4, 4.1 , 4.2, of which the other can be the bottom surface 2 of the case 1 , and between which said attachment surfaces 4, 4.1 , 4.2 there is at least one wall part 3, 3.1 , 3.2.
Said one or more attachment surfaces 4 form together with the wall part and the bottom surface or with the wall part on two different sides of the attachment surface a projection away from the middle part of the case , wherein the case can be made to attach better to the concrete surrounding the case 1 such that the permanency of the case in the concrete improves. In this case, the shape of the case essentially improves the tendency of the cable loop to stay in the concrete, preventing detachment of the case, when the cable loop is opened from the case.
Said one or more attachment surfaces 4 extend as the same material as the wall part seamlessly such that the attachment surface is formed, for example, by bending the metal sheet. The attachment surface is over the entire length of the case essentially as long as the wall part itself.
To the person skilled in the art it is obvious that, as technology develops, the fundamental idea of the invention can be implemented in many different manners. Thus, the invention and its embodiments are not limited to only the examples presented above, rather many variations are possible within the scope of the claims.