RU2293829C2 - Lock for formwork member connection - Google Patents

Abstract

FIELD: building, particularly to connect formwork members at right angle one to another.

SUBSTANCE: lock is made as clip including two jointed semi-clips, which may slide with respect to each other. Clamping cams are arranged on semi-clip arms. Each semi-clip includes base and arm. Arm has T-shaped or H-shaped profile with cross-section varying along arm length.

EFFECT: increased lock strength due to optimal shapes of structural members thereof, reduced contact stresses applied to formwork members to be connected from the side of lock cams, increased functionality due to possibility to connect practically all forming members of formwork assemblage with the use of invented lock, improved geometrical assemblage accuracy due to enhanced alignment of members to be connected, improved operational abilities, for instance enhanced dirt removal from aligning panels, elimination of lock assembling and disassembling during formwork mounting or dismounting.

8 cl, 6 dwg

Description

The invention relates to the field of construction, in particular to devices for connecting formwork elements to each other, including at a right angle.

A known lock for connecting formwork shields containing clamping movable cams and a wedge (RU, 2153564 C1, IPC 7 E 04 G 9/02, E 04 G 17/04, 2000). The disadvantages of the known solutions include the irrational direction of efforts on the part of the cams to the connected profiles of the formwork.

As a prototype of the invention, a technical solution has been adopted, which is a lock for connecting formwork panels containing movable clamping cams and a wedge (RU, 24851 U1, IPC 7 E 04 G 17/00, 2002).

The disadvantages of the prototype should be noted the presence of increased contact stresses arising from the action of the cams on the surface of the connected elements, due to the small contact area; low rigidity of the castle itself, which is due to the presence of thin-walled elements in its design.

The technical result, the invention is aimed at, is to increase the strength of the castle by choosing the optimal form of its structural elements; reducing contact stresses acting on the cams of the lock on the connected formwork elements; increasing the functionality of the lock due to the possibility of connecting with this lock practically all form-forming elements of the formwork system; increasing the geometric accuracy of the assembly provided by the lock due to the alignment of the connected elements; improving its operational properties, such as the removal of dirt from leveling platforms, eliminating the need for disassembly and assembly of the castle during its installation / dismantling of formwork.

The specified technical result is achieved in that the lock for connecting the formwork elements, containing clamping movable cams and a wedge, is made in the form of a bracket consisting of two articulated half-brackets made with the possibility of moving relative to each other, on which the clamping cams are located, while in both half-brackets openings are made for placing the wedge, each half-bracket consists of a base and a console, each console having a T-shaped or I-shaped profile with a variable cross-sectional area along the length onsoli.

The wedge may include a reinforced base, the middle part of the I-section, narrowing and ending, in which a hole is made for inserting a locking element, such as a cotter pin.

Clamping cams can be made in the form of cylinders.

The base of one half-bar may be hollow, while the cavity serves to accommodate the other half-bar corresponding in shape to the base.

On the bases, half-alignment alignment surfaces can be made.

On the basis of each half-bracket, leveling platforms can be made, which serve to align the connected formwork elements.

On the basis of each half-bracket, recesses can be made, which serve for the unimpeded removal of dirt from the place of contact of the connected formwork elements with the lock.

The base of the right half-beam may have an I-section.

The invention is illustrated by drawings, where figure 1 shows a General view of the castle in a perspective view; figure 2 is a General view of the left half-bracket in axonometric projection; figure 3 is a General view of the right half in axonometric projection; figure 4 is a General view of the wedge; figure 5 - lock in operation when connecting the elements of the formwork; figure 6 - lock in operation when connecting the formwork elements at right angles.

The lock for connecting the formwork elements is made in the form of a bracket, for example, C-shaped, consisting of two articulated half-brackets 1 and 2 (hereinafter for convenience, the left half-brace 1 and the right half-brace 2), made with the possibility of moving relative to each other.

The left half-arm 1 consists of the base 3 and the console 4, on which the clamping cam 5 is placed. The base 3 of the left half-arm 1 is hollow, and part of the cavity of the base 3 closer to the ends is open for dirt removal, and alignment pads 6 with the right half-arm are made on its walls 2, in addition, a hole 7 is made in the base 3 to accommodate the wedge 15. The hole 7 is reinforced with a border 8.

The right half-arm 2 consists of the base 9 and the console 10, on which the clamping cam 11 is placed. The shape of the base 9 is in accordance with the shape of the cavity of the base 3 of the left half-arm 1, into which the base 9 is inserted when assembling the lock. The cross section of the base 9 is almost the entire length of the I-beam, which reduces friction with the cavity of the base 3 and helps to remove dirt. The hole 12, made in the base 9, serves to accommodate the wedge 15. The surface of the flange 13, when interacting with the surfaces 6, ensures alignment of the left 1 and right 2 half-brackets with respect to each other. At the end of the base 9, a rounding 14 is made, facilitating the assembly process of the lock.

The wedge 15 includes a reinforced base 16, the middle part 17 of the I-section, the constriction 18 and the tip 19, in which a hole 20 is made for inserting a locking element (for example, a cotter pin or rivet) that prevents the wedge from falling out 15. The constriction 18 allows for free assembly and disassembly of the lock without removing the wedge from the bases 3 and 9, by increasing the possible course of the bases 3 and 9.

To align the connected formwork elements (for example, the profile elements of the formwork panels), leveling platforms 21 and 22 are made on the bases 3 and 9, respectively, of the left and right half-braces.

For unobstructed drainage of dirt from the place of contact of the connected formwork elements with the lock, recesses 23 and 24 are made on the bases 3 and 9 of the left and right half-brackets.

The clamping cams 5, 11, as a rule, have the shape of a circular cylinder, however, the guide contact cylindrical surface interacting with the connected formwork parts can be an ellipse, a part of the parabola or a convex-concave curve, which increases the contact area and thereby reduces contact stress .

The castle is assembled as follows.

The right half-arm 2 is articulated with the left half-arm 1 by introducing the base 9 into the cavity of the base 3. When the holes 7 and 12 are combined, a wedge 15 is inserted into them, after which a locking element is inserted into the hole 20.

The work of the castle is as follows.

To connect the formwork panels to each other, their ends formed by the strapping profile elements 25 and 26 are combined, after which the clamping cams 5 and 11 of the lock are placed in the recesses of the strapping profile elements 25, 26 of the formwork panels to be connected. Then, hitting the base 16 of the wedge 15, hammer it into the holes 7 and 12, as a result of which the left 1 and right 2 half-clips converge, the clamping cams 5, 11 tightly compress the strapping profile elements 25, 26 of the formwork panels. Surfaces 21 and 22, interacting with the bases of the strapping profile elements 25 and 26, align the formwork panels.

When stripping, the middle part 17 of the wedge 15 is knocked out of the holes 7, 12 and the strapping profile elements are released from the compressive forces of the cams 5, 11.

To connect the formwork panels at right angles, an additional profile element 27 is used, the bases of which are located at right angles.

Claims (8)

1. A lock for connecting the formwork elements containing clamping movable cams and a wedge, characterized in that it is made in the form of a bracket consisting of two articulated half-cams made with the possibility of moving relative to each other, on which the clamping cams are located, while in both half-cams openings are made for placing the wedge, each half-bracket consists of a base and a console, each console having a T-shaped or I-beam with a variable cross-sectional area along the length of the console. 2. The lock according to claim 1, characterized in that the wedge includes a reinforced base, the middle part of the I-section, narrowing and ending, in which a hole for inserting the locking element is made. 3. The lock according to claim 1, characterized in that the clamping jaws have a cylindrical contact surface. 4. The castle according to claim 1, characterized in that the base of one half-bar is hollow, while the cavity serves to accommodate another half-bar corresponding in shape to the base. 5. The lock according to claim 1, characterized in that on the bases the alignment surfaces of the half-braces are made. 6. The castle according to claim 1, characterized in that on the basis of each half-bracket leveling platforms are made. 7. The castle according to claim 1, characterized in that, on the basis of each half-bracket, recesses are made. 8. The lock according to claim 1, characterized in that the base of the right half-bar has an I-section.

Images