FI63617C - ANORDINATION FOR THE CONSTRUCTION OF CONSTRUCTION ELEMENTS - Google Patents

Description

R25r71 ΓβΊ MULUUTUTUIJULKAlfO / 7 /> π JSa (11) UTLAQGNINQSSKRIFT 6561 / • C Patent granted on 11 07 1903

Patent aeddelat ^ T ^ (51) Kv.ik.3 / iM.a.3 E 02 D 5/52 FINNISH — FINLAND (21) 761823 (22) HufcumltpMv »—AiMHwlnfvdaf 23.06.76 (23) Alkupllv · —GIWghMid · * 23.06.76 (41) Tullut JulklMksI - Whrtt offuntHf 2k. 12. 77

rumtl- J. raklttwIlwllltM

PatMlt * ocn rtfittontyrdMIl An »ftk» n uttafd och utl. * Kr1ft «n puMtcurud 31.03.83 (32) (33) (31) Pyy4« t * r Muolkuu * —Begird prtorh * (71) (72) Veli Martti Laine , Takojantie 8 C 15, 02130 Espoo 13,

Matti Loukola, Ruorimiehentie 12, OO650 Helsinki 85,

FIELD OF THE INVENTION The present invention relates to a device for interconnecting elements, which device comprises an extension member projecting from another interconnectable element, in a second interconnectable element. a wedge having an opening in the bottom for attaching the extension to the extension and having a second opening on the side adjacent to the bottom of the recess, a wedge which can be fitted into the extension from the latter opening and pressed through a hole formed by the extension and a mounting member elements lock it together.

Joining structural elements, especially concrete piles, with a torque-resistant joint has become more common recently. However, the varying stresses that occur during the punching of piles, which are very high compared to the static load on the structure, have caused considerable difficulties in piling work 6361 7 2.

A solution is known in which the structural elements are connected to one another by a rod-like extension element 11 projecting from another element to be joined and by an extension located in the second element to be joined. The extension member is fitted in the extension hole from the opening in the bottom of the cavity. The elements are then fastened to each other using a wedge which is inserted through a hole in the rod-like extension member and tightened by a threaded mounting member arranged to press the wedge. In such a joint, the rotation of the mounting member can be performed, for example, with a torque wrench, in which case it is possible to adjust the rotational force and at the same time the amount of prestress formed on the opposite extension surfaces of the piles. A separate mounting member also enables the most cost-effective design of the connection components, which makes the structure lighter.

The object of the present invention is to provide a device with which the structural elements can be connected to each other and prestressed, in particular in cases where the support surfaces of the wedge cannot withstand the stress caused by the force components in the direction of movement of the wedge. The invention is characterized in that the device comprises a separate support member which is adaptable to the extension cavity and has a support surface parallel to the side of the wedge and inclined with respect to the opposite side of the wedge, and that the wedge is arranged to rest on said support surface during tightening.

In the solution according to the invention, the support member on which the wedge rests not only transmits the structural load but also the prestressing force to the connecting structures of the structural elements to be connected. At the same time, it is possible to get rid of making a separate shell in connection with the joint structures, and the necessary provisions for placing the joint members in one of the two structural elements can be made in connection with the concrete molding work with corresponding formwork structures.

A preferred embodiment of the invention is characterized in that the support member is arranged through a hole formed by the extension member. In addition, the support member can be provided with a protrusion behind which the wedge is located, whereby the wedge and the protrusion are provided with openings for a screw-like mounting member.

3 6361 7

Combining structural elements into a functional structure often requires increasing dimensional tolerance. This is especially the case in cases where the elements have to be connected to locally manufactured components. In the solution according to the invention, the structures are such that the determination of tolerances can take place according to the situation prevailing on the construction site and still achieve the desired on the opposite surfaces of the elements to be prestressed.

The invention will now be described in more detail by way of example with reference to the accompanying drawings, in which

Figure 1 shows a device according to the invention for joining structural elements together in partial section.

Figure 2 shows a section II-II of Figure 1.

Fig. 3 shows a side view of the elements interconnected by the device according to Fig. 1.

Figures 4 and 5 show a wedge belonging to the device according to Figure 1.

Fig. 6 shows aBennuselel belonging to the device according to Fig. 1, and

Figures 7 and Θ show a support member belonging to the device according to Figure 1 with its support surfaces.

Figures 1-3 show a device according to the invention for joining two concrete piles 1, 2. The device comprises bent steel bars 3, 4 and 5, of which bars 4 and 5 belong to pile 1 and bar 3 belongs to pile 2. The end of the bar 3 forms an extension member projecting from the pile 2 and fitted into the charge 6 in the pile 1. The charge 6 forms a partial extension cavity 7 with two openings. One opening is located at the bottom of the cavity and the other on the side adjacent to the bottom of the cavity. The piles 1, 2 are joined together by juxtaposing the piles so that the extension member 3 protrudes through the opening in the bottom of the extension hole 7 into the reservoir 6. After the wedge San, the support member 9 and the screw-like mounting member 10 are pushed through. The mounting member 10 provided with a screw thread is arranged to tighten the wedge 8, and thus the connection is completed by rotating the mounting member.

In order to clarify the shape of the wedge 8, the mounting member 10 and the support member 9, these parts are shown separately in Figures 4-8. Figures 4 and 5 thus show the wedge 8 seen from the side and front, Figure 6 shows the mounting member 10 seen from the side and Figures 7 and 8 show the support member 9 seen from the side and front.

The support member 9 has, as an integral part, a support surface parallel to the side of the wedge 8 and inclined with respect to the opposite side of the wedge, on which the wedge rests during tightening. The support surface is limited to a protrusion in the support member with an opening for the mounting member 10. The corresponding opening is also in the wedge 8.

It will be clear to a person skilled in the art that the various embodiments of the invention are not limited to the example shown but may vary within the scope of the appended claims. Thus, it is not necessary for the structural elements to be joined to be concrete piles, but other types of elements, such as columns, beams, wall elements or tiles, may also be considered. In addition, it is possible that there are several wedges and support members, as long as they are arranged in such a way that by rotating the mounting member or members, the necessary movement for joining the elements is achieved.

Claims (2)

6361 7 5 An apparatus for interconnecting structural elements (1, 2), the apparatus comprising an extension member (3) projecting from another element to be interconnected, an extension cavity (7) in the second element to be joined, having an opening at the bottom for attaching the extension member to the extension cavity and having a second opening on the side adjacent to the bottom of the cavity, a wedge (Θ) which can be fitted into the extension cavity from the latter opening and pressed through a hole formed by the extension member fitted in the cavity, and a mounting member (10) arranged to tighten the wedge so as to lock , that the device comprises a separate support member (9) adaptable to the extension cavity (7) and having a support surface parallel to the side of the wedge (Θ) and inclined with respect to the opposite side of the wedge, and that the wedge is arranged to rest on said support surface during tightening. Device according to claim 1, characterized in that the support member (9) is arranged to pass through a hole formed by the extension member (3). Device according to claim 2, characterized in that the wedge (8) is located behind the protrusion in the support member (9) and in that the wedge and the protrusion have openings for the screw-like mounting element (10).