CZ2008711A3 - Clamp and positioning fixture - Google Patents

Abstract

BACKGROUND OF THE INVENTION The present invention relates to a clamp and a positioning device for perpendicular gripping of two plates. The shank is formed from a sheet of metal so that it includes a straight middle portion (1) bent at both ends into concavely prestressed arms (2,2 ') forming jaws on which the positioning prisms (3,3') are rotatably mounted on the top. ) or cylinders, wherein the arms (2,2 ') are further provided with internal flat springs (4,4') bent inwardly between the jaws of the clamp towards the middle straight portion (1). The positioning device comprises first means for securing the first plate (7) and the second means for securing the second plate (7 '), said means for securing the plates (7,7') being fixed at opposite ends of the flat plate (6) so that the axes of both the means of fixing the plates (7,7 ') are perpendicular to each other, the first means of securing the first plate (7) and the second means of securing the second plate (7') being clamps.

Description

Technical field

The invention relates to a clamp and a positioning fixture for perpendicular mounting of two plates. The two clamp positioning device is a simple and reliable device for quickly and easily securing the position of two flat parts or two plates to be machined perpendicular to each other and maintained in this perpendicular relative position during assembly.

BACKGROUND OF THE INVENTION

It is common for manufacturers of chipboard or wood panels intended for furniture frames to equip their products with a set of flat cases to achieve efficient storage at points of sale and easy handling of goods for the customer. Subsequent assembly of the basic blanks is generally carried out at or near the intended use. Typically, the panel or flat piece is modified during manufacture to allow assembly by an unskilled worker using fasteners and commercially available household tools.

Holding individual parts of the blank in a perpendicular position, inserting fasteners while using hand tools often requires coordinated cooperation of two pairs of hands. Especially with the longer length and width of the workpieces, such work can be difficult for one person to perform without any failure or even damage to the workpiece. Accordingly, there is a need for a simple device for gripping parts of the workpiece so that one person can then work with them, with hands free to handle hand tools and fasteners.

In this field, a number of attempts have been made to construct holding devices that would hold the blanks in a perpendicular position.

For example, US Patent 5,482,263 discloses a clamping portion coupled to a manual actuator. The clamping part is provided with two jaws. At least one of these jaws has first and second sides, the angle between these sides being adjustable. The second jaw has a curved portion that defines an arc. The first and second jaws are movable between an open and a closed position by means of manual operation.

US Patent 5,697,601 discloses a bi-directional dual function clamp for accurately attaching two or more work items at right angles to each other. Each clamp has two jaws, one of which is L-shaped, the other of 1-shaped. A second, manually operated bolt, carries a thrust plate and extends across the threaded bore in the functional portion of the U-shaped assembly.

US Patent 7,114,714 discloses a multifunctional gripping system based on the interaction of several gripping devices. The whole system is very complex.

US patent 7,066,457 discloses a device comprising first and second clamping elements and a portable longitudinal member on which the clamping elements are movably mounted and on which they move from a working to a rest position. The at least one clamping element may be mounted on the longitudinal member in different directions or may be provided with jaws which may be removable or pivotable relative to the longitudinal member.

These hitherto known devices are complicated and very expensive in terms of production and money. In addition, they are only suitable for professional workers.

SUMMARY OF THE INVENTION

The object of the invention is to provide a device which can be operated with one hand, which would be simple to operate while ensuring that the plates are temporarily held in a rectangular position before they are mechanically connected.

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It is a further object of the invention to make the positioning device easy to use by experienced and manually skilled users as well as by complete beginners.

A third object of the invention is inexpensive and economical production using a combination of maintenance-free components that can withstand worse and careless handling by the user.

A fourth object of the invention is to achieve an optimum holding, i.e. sufficiently strong, but which does not damage the material to be retained.

Yet another object of the invention is to provide a device whose gripping jaws are located outside the contact line of the retaining plates.

These objects are achieved by a clamp according to the invention, which is formed by a sheet of metal sheet comprising a straight middle part, bent at both ends into concavely prestressed arms forming a clamp jaw, at the top of which positioning prisms or rollers are rotatably mounted wherein the arms are further provided with internal flat springs bent inwardly between the jaws of the clamp towards the middle straight portion.

According to the invention, it is preferred that the positioning prism or roller is made of rubber or plastic.

The positioning fixture of the invention comprises first means for securing the first plate and second means for securing the second plate, wherein said means for securing the plates are mounted at opposite ends of a flat flat support such that the axes of grip of the two means of securing the plates are perpendicular. the first plate securing means and the second second plate securing means are clamps according to the invention.

According to the technical solution, it is advantageous if the flat support is a metal strip and that these clamping means are spring clamps.

The positioning fixture, thanks to a pair of clamps mounted in a mutually perpendicular position, facilitates holding the plates ready for permanent connection in a mutually perpendicular position. This ensures an operative, unlimited readiness for handling fasteners and fasteners.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a front and side view of a clamp according to the invention; FIG. 2 shows an elevation and side view of an exemplary embodiment of a positioning device according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

The spring clamp is formed from a sheet metal blank, preferably spring steel, such that it comprises a straight middle portion 1 that is bent upwardly at both ends to form the clamp jaws. From both ends of the blank, the middle portion, the inner flat spring 44 ', is cut out, which is bent inwardly between the clamp jaws downwardly to the middle portion. The remaining outer strips of the sheet at both ends of the sheet blank facing upwardly are prestressed. that they form upright arms 2, 2 '. A positioning prism 3, 3 'or a roller is rotatably mounted at the ends of the arms 2, 2'. The upright arms provided with positioning prisms 3, 3 'form the jaws of the clamp. The positioning prisms 3, 3 'are pivotally mounted on the arms 1', for example by means of pins 5, and serve to grip the plate 7, 7 * and to secure its position. Made of rubber or plastic, they also protect the surface from damage. The two inner flat springs 4,4 'together form a resilient sleeve to hold the bottom of the plate 7,7' against lateral movement.

The positioning jig is formed from a flat, flat support 6, preferably also from sheet steel. At the ends of this flat support 6, the spring clamps described above are fixed so that the axes of their jaws make a right angle to each other.

First, the first clamp of the positioning jig is clamped onto the first plate 7.

A second plate 7 'is then placed at right angles and the second clamp is clamped thereon. The jaws of each clamp, i.e. the concavely biased arms 2, 2 'continuously press the positioning prisms 3, 3' into engagement with each of the joined plates 7, T. 5 The underside of the plates 7, 7 * is inserted between the inner flat springs 4, 4 ' that provide the plate with flexible stabilization of the correct position.

The invention may be practiced by other means within the scope of the invention as claimed. The scope of the invention is not limited to the exemplary embodiments and drawings.

Claims (3)

PATENT CLAIMS Clamp, characterized in that it is formed from a sheet of metal sheet comprising a straight middle part (1), bent at both ends into concavely prestressed arms (2,2 ') forming a clamp jaw, the upper parts of which are rotatable positioning prisms (3,3 ') or rollers are provided, the arms (2,2') further having internal flat springs (4, 4 ') bent inwards between the jaws of the clamp towards the middle of the straight part (1). Clamp according to claim 1, characterized in that the positioning prism (3,3 ') or roller is made of rubber or plastic. 3. A positioning device comprising first means for securing the first plate (7) and second means for securing the second plate (7 '), the means for securing the plates (7, 7') being attached to opposite ends of the flat flat support (6) such that the axes of clamping of the two plate gripping means (7, 7 ') are perpendicular to each other, characterized in that the first plate gripping means (7) and the second plate gripping means (7') are clamps according to claims 1 and 2.