MXPA96003995A - Saw blade-holder[in-del-1996-01915a] - Google Patents

Abstract

It comprises a U-shaped bow (1), a handle (2) and two securing devices (3, 4) at both ends of the saw (5), each of the said devices (3, 4) comprising a body (31) fitted with a longitudinal cross-piece (32) enabling the control and centring of the saw (5), the body (31) comprising a tightening screw (33, 34) fitted perpendicularly to the said cross-piece (32) enabling the possibility of tightening the corresponding end of the afore-mentioned saw (5) in the cross-piece (32).[IN-DEL-1996-01915A]

Description

SAW BLADE BRACKET Field of the Invention The present invention relates to a saw blade fastener comprising a U-shaped arc, a handle and two locking devices at both ends of the saw. Prior art These devices are commonly used to secure the sheets of the wire or flat, low-width saws used to saw different materials. Normally the wire sheet is secured to the ends between two solid jaws on each side of the circus. The jaws comprise, mainly, on the one hand a fixed solid part at each end of the arch and on the other hand, a second moving part which is a plate along which a screw is screwed on the fixed part. By rotating the screw in one direction, the movable plate is secured to the flat surface and therefore the sheet is secured. This method, which has been used for decades, has the disadvantage of an uncertain safety and an inaccurate position and often, during tensioning of the plate, the saw is twisted or, during sawing, becomes deformed. Summary of the Invention The objective of this invention is to offer a saw blade fastener for these saws and, more specifically, for saws used by jewelers that are smaller in size, regardless of whether they are flat or wire-shaped. The saw blade holder in this invention is characterized by the fact that the two securing devices are identical, that each of these devices comprises a body fitted with a longitudinal passage, the dimensions of the cross section to which corresponds to the cross section of the saw that allows control and centering of the saw and that the aforementioned body comprises a locking screw adjusted perpendicular to the passage allowing the tensioning of the end corresponding to the aforementioned saw in the passage. The advantage of the saw blade holder in this invention is the fact that the saw blade is controlled and centered in the passage of the block, whose dimensions clearly correspond to the normal dimensions of these saws and, during the sawing operations, there is practically no space for the saw to move within the aforementioned passage. According to the variations of operation, the tensioning is carried out between the ends of two screws, one on the side of the passage and the other used to tighten or loosen the leaf. In such a way that this also allows the saw to be modified for left-handed or right-handed users. In fact, when the blade is placed, it is essential to ensure that "the blade is firmly secured between the two ends of the bow and, to this end, the bow is pushed, using the hand or abdomen, against an obstacle, then the adjusted or loose screw Depending on whether the user is left-handed or right-handed, the tensioning and loosening screw must be on the correct side and, in this case, it is sufficient simply to change the position of the fixed screw with the tensioning screw set with a This modification can be made very easily by future users although this is also possible, during assembly, to provide the saw blade fasteners for left-handed or right-handed users, without having to provide a special construction. of operation and also in order to allow the possibility of light movement of the saw outside the plane of the arch, thus allowing the piece on which it is locked If it is seen, the safety device comprises a T-piece, the head of the T being perpendicular to the plane of the arch and the aforementioned body being adjusted on the side of the right hand or left hand of the leg of the T depending on the hand that the operator uses. The insurance is made by means of a screw that crosses the outer leg up inside the passage. This screw and the screws with sprockets ensure that the blade is secured. Joining the body on one side or the other at the beginning, we have a saw for a left or right handed user. The variation of the operation also allows the possibility of using a saw whose length is greater than the distance between the ends of the arch. The invention also seeks to offer a saw blade holder that allows easy replacement of missing or worn parts. Each of the parts of the arc, insurance devices and handle are, therefore, interchangeable. In order to contribute to the lightness of the tool, the arch is constructed of a raspy tube that represents sufficient strength for the work carried out by jewelers or of a similar nature. In the same way, the handle is constructed of a plastic material covered with foam, allowing the possibility of preventing the tool from slipping when the user sweats. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in greater detail with the help of the drawing in the annex. FIGURE 1 is a diagrammatic side view of the tool showing the different elements. FIGURES 2, 3 and 4 are horizontal sections of the safety device at the ends of the saw.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGURE 1 shows a U-shaped arc 1 fitted with a handle 2 and two locking devices 3 and 4 for a leaf 5. The above-mentioned 5 elements are preferably interchangeable and therefore detachable. For example, screws or similar assembly devices are used in order to interconnect these different elements. FIGURE 2 shows the simplest variant for the insurance device. This device comprises a body 31 fitted with a longitudinal passage 32, whose dimensions correspond to the dimensions of the leaf 5 thus allowing the leaf to be controlled and centered. A screw 33, fitted with a gearwheel head 34 allows the possibility, once the blade 5 is readjusted in the passage 32, of tensioning the blade against the wall of the passage 32 and thus securing the blade. Devices 3 and 4 are identical. FIGURE 3 shows another variant of operation comprising a body 35 also traversed by the passage 36 and fitted with a screw 37 with a splined wheel head 38. In relation to the body 31, the body 35 is adjusted with another screw 39 located in the extension of the screw 37. This screw has a dual purpose: the first is to be able to secure the blade 5 between the ends of the screws 37 and 39 that can be hardened thus allowing the correct tensioning and at the same time , allowing the body 35 to be constructed of a light alloy which is an advantage for the saw blade holder. A second advantage is that the screws 39 and 37 can be adjusted to the needs of the consumer of the saw for a left-handed or right-handed user. Finally, the insurance device in FIGURE 4 comprises a body 35 that is identical, or almost identical, to that of FIGURE 3, fitted with a screw 37, driven by a sprocket head 38. The part 41 is in the form of a T and the body 35 fits the side of the leg of the aforementioned piece with a screw 39 'which is longer than the screw 39. This screw 39' ensures the lock of the body 35 in this intermediate piece 41 and also ensures, as in FIGURE 4, the lock of the saw blade between the two ends of the screws 37 and 39 '. In this case, the piece 41 is adjusted so that the leg of the piece 41 is located in the same plane as the arc 1 which means that the sheet is outside the center in relation to the plane of the arch, a possible advantage when working on small parts because the work plane is completely clear from the point of view of visibility. On the other hand, this construction also allows the possibility of adjusting the body 35 to the side of the left hand or the right hand of the piece 41, thus converting the saw for right-handed or left-handed users. The piece 41, which, moreover, with the parts 35 in FIGURE 3 and 31 in FIGURE 2, is fixed to the arch, for example, using a screw 42 that is only shown in FIGURE 4. In addition, this position outside of center allows the possible use of a saw that is greater in length than the distance from one end to the other end of the arch, this length being usually 130 mm. The saw blade holder is adjusted with a handle 2, which is also interchangeable, adjusted using a screw or equivalent device, made of a cylindrical piece covered with foam, allowing the correct behavior of the saw blade holder. The elements described above constitute variants of operation and other variants can be displayed.

Claims (7)

1. A saw blade fastener comprising a U-shaped arc, a handle and two locking devices at both ends of the saw, each of the two devices being attached to one of the ends of the arc, characterized by the fact that the two securing devices are identical, that each of the devices comprises a body fitted with a longitudinal passage, whose dimensions in cross section correspond to the cross section of the saw that allows the control and centering of the saw and that the The aforementioned body comprises a locking screw adjusted perpendicular to the passage allowing the tensioning of the end corresponding to the aforementioned saw in the passage.

2. The saw blade fastener according to claim 1, characterized in that the body is fitted with a second screw located in the extension of the first screw and which ends inside the passage so that the saw can be Tension between the ends of the two screws.

3. The saw blade fastener, according to claim 1, characterized in that the body is adjusted by a screw in the leg of a T-shaped piece, the head of the T being perpendicular to the plane of the arc and that the aforementioned screw is located in the extension of the tension screw, with its end located in the passage. The device according to claim 2 or 3, characterized in that the securing devices are constructed of a light alloy and the screws have hardened ends. The device according to one of claims 1 to 4, characterized in that each of the parts comprising the saw blade holder are interchangeable. The device according to one of claims 1 to 5, characterized in that the arch is constructed of a raspy tube. The saw blade fastener according to one of claims 1 to 6, characterized in that the handle is made of a plastic material covered with foam.