SU854620A1 - Lever-type shears - Google Patents

Description

(54) LEVER SCISSORS

I

The invention relates to a pressure treatment, in particular to a hand tool and can be used for cutting sheet and bar material.

Knife scissors for cutting material are known, which contain two arms that are spring-loaded relative to each other, connected by an axis and carrying cutting elements made in the form of two fixed plate-type knives mounted on one of the levers and a movable knife with teeth mounted by an axis on the other lever between the indicated blade knives, as well as the material clamping unit 1.

However, these lever shears do not provide high quality cutting and are inconvenient in operation.

The purpose of the invention is to improve the quality of cutting scissors and their convenience in work.

This goal is achieved by the fact that lever shears for cutting material containing two arms spring-loaded with each other, connected by an axis and supporting cutting elements made in the form of two fixed plate-blades mounted on one of the levers, and a movable knife with teeth mounted by an axis on the other lever between the said blade knives, as well as the material clamping unit, equipped with a limiting unit for supplying the material being cut, made in the form of an axis eccentrically placed in the bushings and a coil spring with a bent end mounted on it, with this in the lever with plate-blades grooves are made, and the said sleeves are suitable for movement in translation.

The material clamping unit is made in the form of a spring-loaded plate-like lever fixed on the lever with a movable knife and pivotally attached to it, while in the clamp there is a groove for accommodating the teeth of the movable knife.

G The purpose of ensuring the cutting of thin-sheet material on the teeth of the movable knife and on one of the fixed blade knives is bevels.

Claims (3)

 FIG. I depicts lever shears, a general view; in fig. 2 - the same, top view; in fig. 3 - site limiting the supply of material. When working with sheet material; on fi). 4 a section aaa aa fig. (option 1); in fig. 5 shows section A-A in FIG. 1 (option 2); in fig. 6 - unit for limiting the supply of material when working with bar material. Lever shears contain two levers 1 and 2 with a spring 3 connected by an axis 4 and carrying cutting elements made in the form of two fixed plate knives 5 mounted on the lever} and a movable knife 6 interacting with teeth 7 mounted with an axis 4 on the lever 2 between the blade knives 5. The material clamping unit comprises a plate lever 9 under the spring 8 attached to the lever 2 and a clamp pivotally associated with it 10. The clamp-Yu has a slot for accommodating the teeth 7 of the movable knife 6. The node limitation of flow The device contains a cylindrical coil spring 11, with a bent contour 12, mounted on an axis 13, eccentrically placed in sleeves 14, which are installed in slots made in lever 1. A tooth x 7 of the movable knife 6 and one of the fixed plate knives 5 are made bevels. On the sleeves 14 there are nuts 15, spring-loaded spring 6. The feed rate is set on the scale S7. The lever shears work (as follows. In the initial position (Fig. 1), the lever 1 and 2 are in a diluted form, pressed by the spring 3 with the lever 2 resting in the body of the lever 1. The material to be cut 18 is pressed by the clamp 10 to the support surface of the lever 1, its the end of the cut side rests against the bent end 12 of the spring ll of the cut-feed limitation assembly (see Fig. 1). Then, at a relative opposite angular rotation of the levers 2 and I using the efforts of the worker’s hand, the movable knife 6 cuts into its material 7 18, notch section 19, corresponding to In the process of turning the movable knife 6, the spring 11 rotates in the sleeves 14 by an angle a (see FIG. 3) with its cylindrical turns tightened and with its additional bend (5th, which is used to remove products at the end of the working rotation of the movable knife 6. When external forces are removed from the levers 1 and 2, the latter return to their original position (Fig. 1) .To carry out a subsequent cut, the cut material 18 shifts along the cut groove in the direction of the cut by the cut value at ora in its bent end 12 of the spring assembly and limited no-i cottages at res. The cut value is determined depending on the thickness of the material being cut 18 and on the strength capabilities of the worker’s hand, and varies from "O to the maximum value determined by the length of the tooth 7 of the movable knife 6. When cutting materials 18 of small thickness, to I mm, scissors can work in simplest scissors mode, but with the formation of the necessary groove for the passage of the movable knife 6 and the lever 9 by flanging one of the cut edges (Fig. 5), through the use of one-sided slopes on the movable knife 6 and on one of the plates nagging knives 5. At the same time, the warping of the cut part of material 18 is completely excluded. When cutting bar material 20, scissors work in the same way as cutting sheet material, but with a smaller feed to the cut (for large sections). The cutting speed of the bar material can be increased due to its additional rotation around its axis (see Fig. 6) and due to a steady increase in the feed to the cut. The use of this invention improves the quality of the cut and ease of operation. Claim 1. Lever shears for cutting material containing two arms that are spring-loaded relative to each other, connected by an axis and carrying cutting elements. made in the form of two fixed plate knives mounted on one of the levers and a movable knife with teeth mounted by an axis on the other lever between said plate blades, as well as a material clamping unit, which in order to improve the cut quality and convenience at work, | they are provided with a feed restriction unit; the material being cut, made in the form of an axis, eccentrically placed in the sleeves and a coil spring with a bent end mounted on it, while grooves are made in the lever with plate-type knives, and the said sleeves are installed in them with the possibility of translational movement, 2. Scissors, according to claim 1, characterized in that, c, the material is clamped in the form of a spring-loaded plate lever fixed on the lever with a movable knife and pivotally associated with it, while the clamp has a groove for accommodating the teeth of the movable knife. 3. Scissors according to claim 1, characterized in that, in order to ensure the cutting of thin-sheet material, bevels are made on the teeth of the movable knife and on one of the fixed plate-type knives. Sources of information taken into account in the examination 1. US patent No. 3424046, cl. In 23 D 29/00, 1969. WITH( eleven Aa Fy f K Phi2.5 eleven