CZ13979U1 - Angle-setting fixture for precise cutting by a hand-held electric saw - Google Patents

Description

Technical field

The technical solution relates to an angular jig for precise cutting of semi-finished semi-finished products, boards, planks, tiles and similar materials with a hand-held electric saw.

Background Art

Precise sawing of these wood-based materials is currently being carried out in joinery operations on large format circular saws equipped with sliding and rotary tables, guides, scales and other aids for precise cutting.

However, in some cases it is necessary to precisely cut plate-like materials outside the workshop, e.g.

on construction sites where parts for formwork, fillings, hinges and other building and joinery and carpentry products are needed.

There is a need to use a hand-held electric saw, usually circular, whereby the cutting line must first be carefully measured and scribed before the actual cut is made, which greatly hinders work and also causes a number of cutting inaccuracies.

For precise guiding of the saw, two types of guiding rulers are supplied to the hand-held electric saw, either straight rulers or rulers adjustable from two L-shaped parts. These rulers are more useful for scribing than for the saw's own guiding because they are not stable and, in addition to low accuracy, are also not ideal for operator safety.

The essence of the technical solution

The above drawbacks are largely removed by the angular jig for a handheld electric saw according to the present invention. Its essence is that it consists of three arms that can be assembled into a rectangular triangle. One leg of this triangle is formed by a support arm which is provided with at least one stopper arranged perpendicular to the plane of the material to be cut. The second leg is formed by a guide arm which forms a right angle with the support arm. The hypotenuse is formed by an angular arm. The support arm, the guide arm and the angular arm are pivotally connected to each other at the apexes of the right-angled triangle by locking screws, allowing a firm yet detachable connection.

The main advantage of this arrangement is that, when the stopper is applied to the material to be cut, the fixture allows the immediate execution of precise cuts at 90 ° around the guide arm and at an angle of 45 ° around the hypotenuse without having to pre-scribe the cut material. Another significant advantage is that the angular jig according to the invention is easy and foldable after loosening the locking bolts into a folded state in a longitudinal and flat shape, and can be easily stored and transported together with other tools and tools. Depending on the side to which the angular arm is attached, the fixture can be used for both left and right hand cutting.

In a further embodiment of the invention, it is advantageous if the angular arm is provided with an angular scale which makes it possible to mark any angle lying between the sides of the right triangle.

Furthermore, it is advantageous if a recess is provided at least in the part of the length of the support arm and the angular arm for connecting the support arm and the angular arm by means of one of the locking screws in a different position of the arms than that corresponding to the shape of the right triangle. This arrangement allows the angular arm to be adjusted to any acute angle and locked at this angle by the locking screws. The adjustment of the angular arm in a pre-selected angle is particularly advantageous in cases of repeated cutting of the same angle blanks.

In another preferred embodiment, the guide arm has a leading portion extending over the top of the guide arm connection with the support arm. This lead-in section is used to guide the hand-held electric circular saw when cutting into the cut on the edge of the cut material.

-1 CZ 13979 Ul

It is also advantageous if the thickness of the guide arm and the run-in part is less than the clear distance between the lower part of the engine and the lower part of the manual electric circular saw table so that the saw motor can pass over the guide arm.

For structural reasons, it is advantageous if the abutment arm is formed of an L-profile which is 5 of the most accessible and of sufficient strength.

In a further preferred embodiment, at least two set screws are provided in the support arm stopper for rectifying the right angle of the jig and the cut plate.

Finally, it is advantageous if at least one of the arms is provided with a handle for gripping and holding the angular jig by the other hand during cutting.

The advantages of the angular jig according to the invention can be seen in particular in the fact that it enables simple, fast and precise cutting of plate-like semi-products, boards, planks, tiles and similar materials by hand electric, especially circular saw, without the need to pre-scribe the cut blank. Cutting can be done at 90 °, 45 ° or at any desired angle. After dismantling, the angular jig is easy to store and portable. The solution is structurally fir-free and easy to manufacture.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution will be explained in more detail with reference to the drawings, in which: FIG. 1 is a front elevational view of an angular jig on the material to be cut; FIG.

Examples of technical solutions

The angular jig is formed by three arms 1, 4, 5, which can be assembled in the shape of a rectangular triangle and can be fixed by means of locking screws 6 at the apexes of the triangle. The material of the arms 1, 4, 5 may be metallic, eg aluminum, iron or alloy materials, the use of tough and hard plastic is not excluded. The back arm 1 is in the illustrated embodiment an aluminum L-profile 40 x 40 x 4 mm. The guide arm 4 and the angular arm 5 are formed by a 40 x 5 mm aluminum strip. The locking screws 6 have a countersunk head so that the saw body can run over them. The angle arm 5 is provided with an angular scale 8 ranging from 1 to 90 °. Recesses 7 are provided in the support arm 1 and in the angular arm 5, allowing the support arm 1 and the angular arm 5 to be moved and fixed by means of the locking screw 6 at any adjustable angle. A removable handle 9 is also fastened in the recess 7 of the angular arm 5 by means of the screws not shown on the back side of the angular arm 5. The guide arm 4 has a leading part Ta that thickness is chosen to be smaller than the clear distance between the lower part of the engine and the lower part worktops manual electric circular saws.

Depending on which side of the guide arm 4 the support arm 1 and the angular arm 5 are fixed, the device is usable for left-handed or right-handed users.

The angular jig assembled in a rectangular configuration is applied by a stopper 2 on the support arm 1 to the edge of the cut material 3 at a selected point of cut. Possible angular inaccuracies may be removed by the set screws 10. The tool is gripped by the hand 9 by the hand, and the other hand is cut by a hand electric circular saw along the guide arm 4 at an angle of 90 ° or along the angle arm 5 at an angle of 45 °.

In a non-rectangular arrangement, a similar procedure is followed, the section being generally guided along the angle arm 5 set at the desired angle and locked by the locking screw 6 in the recess 7.

Upon completion of the work, the angular jig is assembled as shown in Figure 3 so that it can be easily stored and transported.

-2CZ 13979 Ul

Industrial usability

The angular jig according to the technical solution can be used especially for precise cutting of plate-shaped semi-products, boards, boards, tiles and similar materials by hand electric saw, eg circular saw or similar saw, and wherever precise work management is needed when working any materials tools at a specified angle.

Claims (9)

PROTECTION REQUIREMENTS An angular fixture for precision cutting by a hand-held electric saw, characterized in that it consists of three arms (1, 4, 5) assembled in the form of a rectangular triangle, wherein one leg consists of a support arm (1) provided with at least one stop (2) disposed perpendicular to the plane of the material to be cut (3), the second leg is formed by a guide arm (4), and the hypotenuse is formed by an angled arm (5), the support arm (1), guide arm (4) and angle arm (5) being at the vertices of a rectangular triangle, they are rotatably connected to each other by means of locking screws (6) enabling a firm yet detachable connection. Angle fixture according to claim 1, characterized in that the angled arm (5) 15 is provided with an angle scale (8). Angle fixture according to claim 1 or 2, characterized in that at least part of the length of the support arm (1) and the angular arm (5) is provided with a recess (7) for connecting the support arm (1) and the angular arm (5) by means of one of the locking screws (6) in a different position of the arms (1, 4, 5) than corresponding to the shape of a right triangle. An angled fixture according to at least one of claims 1 to 3, characterized in that the guide arm (4) has a leading part (4 ') extending beyond the top of the connection of the guide arm (4) to the support arm (1). Angle fixture according to Claim 4, characterized in that the thickness of both the guide arm (4) and the leading part (4 ') is less than the clearance between the lower part of the motor and the lower part 25 parts of worktop of hand-held electric circular saw. Angle fixture according to at least one of Claims 1 to 5, characterized in that the support arm (1) is formed from an L profile. Angle fixture according to at least one of Claims 2 to 6, characterized in that at least two set screws (10) are arranged in the stop (2) of the support arm (1). 30 Angle fixture according to at least one of Claims 1 to 7, characterized in that at least one of the legs (1, 4, 5) is provided with a handle (9). Angle fixture according to Claim 8, characterized in that the handle (9) is fixed in the recess (7) of the angular arm (5).