SU1412940A1 - Hand shears - Google Patents

Abstract

The invention relates to a tool for trimming tree and shrub branches and can be used in agriculture; The purpose of the invention is to realize the effects of use. Manual scissors contain handles I and 2 with hinged on axis 3 cutting 4 and the opposite 5 knives. The spring 6 is fixed to the handle 1 by one end, and the other by means of a flexible rod 7 and two blocks 9 and 10 mounted on the bracket 8 and connected to a second handle equipped with a stop 11 for interacting with the block 10. The block 10 is installed in the transverse guide groove 12 with the possibility of reciprocating movement. When the block 10 is placed in the lower part of the guide groove I2, it contacts with the stop 1, and the knives 4 and 5 do not completely overlap each other by the value of CI. When the cutting branch is taken, the KNIVES 4 and 5 are opened from the fully g closed position under the action of the component force of the section of flexible cable 7 between blocks 9 and 10 without the cost of this cone energy cutter. The same component force at the end of the branch cut ensures the closing of the handles 1 and 2 of the tool gently, without collision. 6 Il. i4

Description

YU

WITH

0g.2

The invention relates to a tool for trimming tree and shrub branches and can be used. Vano in agriculture.

The purpose of the invention is to increase the efficiency of use.

FIG. 1 shows the hand scissors with the knives completely covered, general view; in fig. 2, the main lines show scissors in the neutral position, with the blades not fully re I, and with dash-dotted lines with the blades fully open, in FIG. 3 shows the node I in FIG. (remote element); in FIG. 4, that; however, with the lowest position of the first block in FIG. 5 is a section A-A on I of FIG. 3 J in FIG. 6 section BB on: FIG. 3

 Hand shears contain handles; 1 and 2 with hinged to; AXIS 3 with a cutting 4 and a shear 5 .Buildings, a spring 6, one end fixed on the handle 1, and the other by means of a flexible rod 7 and two blocks 9 I and 10 mounted on the bracket 8 connected to the handle 2, The latter is equipped with a stop 11 for interacting with the block 10, which is installed with the possibility of reciprocating movement in the transverse guide slot 12 of the bracket 8. In addition, when the block 10, located in the lower part of the guide groove 12, contacts with the stop 11 flexible cable 7 between blocks 9 and 10 is parallel to its section between do block 9 and spring b, and the knives are not

completely overlap each other. Be-40 end of cut.

Claims (2)

Invention Formula Manual scissors containing handles with cutting and hinged knives hinged on an axis. The amount of C depends on the type of wood, the trimmer's physical abilities, etc. and, as shown by research results, are within 0.2-0.35 D, where D is the maximum d-45 interconnected spring. meter of the branch to which the tool is designed. For fixing the knives in the closed position in the upper part of the guide groove 12, a recess 13 is completed. Blocks 9 and 10 are mounted in the bracket 8 on the axes 14 and 15. FIG. 1-4 is indicated: l -ilXl is the length of the spring b, respectively, in the prestressed state, when the knives 4 and 5 are open by the amount C, with the fully closed and fully open position of the knives 4 and 5; about,; o (. - the angle between the handles 1 and 2, when the knives 4 and 5 are fully closed, open on the value of C, fully divorced to capture the branch being cut, respectively. Manual scissors are as follows. When removing the knives 4 and 5 from the closed position by turning the handles 1 and 2 from each other and withdrawing the axis 15 of the block 10 from the recess 13 of the guide groove 12 by the amount C, the further opening of the knives is performed under the action of the component tension force P gi 7 in the area between blocks 9 and 10 without the cost of a miner cutter energy. To complete the cut of the branch being cut off, the operator spreads the handles 1 and 2, overcoming the elastic force of the spring 6 and thereby accumulating energy. After the branch has been grabbed by knives 4 and 5, the resistance to cutting forces is achieved simultaneously by the cutter forces and the spring force b, acting through the flexible rod 7 on the handles 1 and 2. Their combined action continues until the knives 4 and 5 are cut by the amount C, t, e. until the contact of the stop 11 with the block 10. The cutting of the branch and the complete closure of the knives 4 and 5 in section C is accomplished only by means of compact efforts of the trimmer, by overcoming the component P of the flexible section of the section of the flexible rod increasing as the knives overlap. between blocks 9 and 10, thereby reducing the impact force of the tool parts O five an anvil, an arm mounted on one of the handles, characterized in that, in order to increase the efficiency of use, the arm is hingedly mounted with blocks connected by a flexible link, one end of which is connected to a spring installed in the handle and the other rigidly mounted on the opposite handle, with one of the blocks mounted in the transverse row of the bracket with the possibility of contact with the stop in the extreme position, and the spring is pre-stressed. 1 89 1: 5 I 1 6 J .J / / G 7 T 3 Shigl AT 6 FIG. at FI.5