CLAMPING DEVICE FOR ATTACHING COMPONENT WHICH IS INSERTED INTO A HOLE

Abstract: To achieve a clamping device with an improved attachment of a component (3) inserted in a hole (2) and with a casing (5) of a deformable material arranged in a recess (4) in the end of the component and having a V-shaped notch open towards the end of the component, a wedge (10) inserted in the notch with its longitudinal direction parallel to the end surface of the component by a screw (12) through a threaded hole (11) through the wedge and a hole (13) through the casing, the wedge is pressed down into the notch of the casing thereby displacing parts of the casing located around the notch towards parts of the component located on both sides of the recess (4) so that the latter parts are pressed towards the wall of the hole at right angle of the longitudinal direction of the wedge. By the arrangement according to the invention of the two holes (11 respective 13) through the wedge and the casing at an angle to the longitudinal direction of the wedge the effect will be achieved that when tightening the screw the wedge will be pressed down into the notch and at the same time displaced in its longitudinal direction with one end (17) against the wall in the hole (2), into which the component (3) is inserted, and this in a direction perpendicular to the direction, in which the wedge presses the parts of the component against the wall of the hole, which are located on both sides of the recess (4).

Description: Clamping device for attaching component which is inserted into a hole -The present invention relates to a clamping device for the p pose of attaching a component, which is inserted into a hole, for example, a table leg, which is inserted with its upper end into a hole in a table frame or a table top, and said clamping device is composed of a casing of a deformable material, for example plasti inserted in a recess in the end of the component, said casing hav a V-shaped notch open towards said end. Into this notch a wedge i inserted with its longitudinal direction parallel with the end su face of the component, besides which a screw is guided through a hole in the casing and screwed into a threaded hole through the w with its head adjoining an adjacent surface in the casing, so tha when tightening the screw, the wedge is pressed down into the not of the- casing by displacing parts of the casing cm both sides of notch against parts of the component on both sides of the recess thereby pressing the latter parts against the wall of the bole at right angles. to the longitudinal direction of the wedge. -The purpose of the invention is to achieve a shaping of the clamping device in order to obtain pressure against the wall of th hole also at right angles to the last-mentioned pressure directio and thus an improved attachment of the component in the hole. The invention is furthermore described in relation to the accompanying drawings, wherein:- Figure 1 shows, partly in section, part of a table frame or table top with an attached table leg, which is inserted with its u per end into a hole in said frame or top and attached by a clampin device according to the invention; OfilFI WrrO Figure 2 is a section along the line A-A in Figure 1 showing among others the upper end of the table leg; Figure 3 is a section along the line B-B in Figure 2; and Figure 4 shows an alternative implementation of ' some details relating to the invention. In the drawing, 1 is part of a table frame or table top which on the underside has a hole 2 for a table leg 3 which is inserted into this hole with its upper end. The upper portion of the table leg has essentially in the cross-section a ϋ-shaped recess 4 into which a casing 5 is inserted. The casing which is preferably manufactured of a defoπnable material such as nylon consists of ' two halves 6 which are connected to each other in a downward direction with the help of a relatively thin deformable wire 7. The outer walls 8 of the casing could, as suggested in Figures 3 and 4, be knurled or serrated for better grip against the walls of recess 4. In its upper portion the casing has a V-shaped notch 9, hich is opened to the top. A wedge 10 with preferably semi-cylindrical crossrsection is inserted in the upper part of the notch. - This wedge has a threaded hole 11 for a screw 12 to be screwed into the hole and guided through a corresponding . ' * = hole 13 in the lower portion of the casing and the screw has a hea 14 adjoining a contact surface 15 around the hole 13 in the lower portion of the casing. According to the invention, the holes 11 and 13 are arranged at an angle for example, 40° to 60°, o. the longitudinal direction of the wedge 10. When tightening the screw 12, this forces the wedge 10 some distance down between sides of the casing through parts 6 which are located around the notch 9; in this way these parts are pressed against the sides of the parts16 which are located around the recess 4. These parts are pressed in this way against the wall of hole 2 in direction which are at right angles to the longitudinal ' -direction of the wedge. At the same time, the angular adjustment of the screw displaces the wedge somewhat in its longitudinal directio so that its one end 17 presses against the wall of the hole as indicated in Figure 1 with a broken line,which indicates the alternative location of the wedge. In this way the wedge presses the table leg in the opposite direction to its contact surface with the wall of the hole. The table legs thus are securely attached in two directions which are at right angles to each other. If the screw is loosened the table leg can be removed from hole 2. A clamping device according to the invention may be modified. Figure 4 shows that the wedge 9 can advantageously be shaped or constructed with a cross- section of trapezoidal shape. The thin wire 7 between the halves of the casing 6 may according to Figures 2 and 4 be replaced with pinsIS inserte in corresponding holes in the halves of the casing. The clamping device according to the invention may be used in other areas than . furniture construction.

Claims: PATENT CLAIM. A clamping device for the attachment of a component(3) inserted in a hole (2)for example, with its upper portion in a hole (2)- in a table frame or table top inserted table leg (3), a casing (5) of deformable material such as plastics arranged in a recess (4) and provided with a V-shaped notch (9) ope towards the end of the component, a wedge (10) inserted in the notc with its longitudinal direction parallel to the end surface of the component, a.-.screw (12) is guided through a hole of the casing (5) and screwed into a threaded hole (13) through the casing with its head adjoining, a contact surface (15) of the casing, so that, hen tightening the screw, the wedge is pressed down into the notch (9) of the casing (5) by displacing parts (6) of the casing located on both sides of the recess (4), so that the latter parts are pressed at right angles to the longitudinal direction cf the wedge towards the walls of the hole, c h a r a c t e r i z e d by the fact, that the threaded hole (11) through the wedge (1C) and the hole (13) through the casing (5) are at an angle to the longitudinal directio of the wedge, so that, when tightening the screw (12) and consequen ly pressing the wedge down into the notch (9) of the casing (5),the wedge is simultaneously displaced in its longitudinal direction and pressed in a direction at right angles to the above mention pressin direction against the wallsof the hole (2),into which the component (3) is inserted. 0MPI ,- _. 1PO ,

Inventors: STERTE RAGNAR, STERTE, RAGNAR
Applicants: ERICSON IVAR AB, AKTIEBOLAGET IVAR ERICSON
Application year: 1983
Main classification: F16B12
IPC codes: F16B2, F16B12