CS274111B1 - Connection of operating tool with handle and method of forming this joint - Google Patents

Abstract

The solution concerns securing of a tool, for example of a hammer, (1), an axe, a splitting hammer, a hoe, a pick etc. against tripping from a handle (2). This problem is solved by an insertion of a peg (3) into a slanting groove (5) between the tool and the handle (2).<IMAGE>

Description

The invention solves the safe connection of hand tools to the handle and prevents the tool from slipping out of the tool ·

So far, the connection of such a tool is solved so that after insertion, the wedge is secured against slipping by inserting a wedge · (For example CSN 23 01 01 for hammers) · For this purpose, the through hole of the hammer is tapered in the middle third of its height; the shaft must also be tapered to this profile. However, the impact of the tool causes the wedge to extend and fall out / immediately following the movement of the tool along the shaft to slip out of the shaft.

This can jeopardize the safety of workers. It can be mathematically proven that the loss of shaft mass by narrowing a third of the tool bore and splitting it by driving in a wedge is about 25%. This connection method is generally only guaranteed at two thirds of the tool bore height, and only when wedge It is firmly stuck. Oakmile falls out of the wedge, the tool is connected to the shaft only in the middle third of the height of the through hole.

Disadvantages of the prior art are eliminated by the connection of the tool to the handpiece according to the invention, which is based on the insertion of the pin into the oblique groove at the edge of the tool through hole. the tool is unconstrained throughout the height, the shaft is not weakened, nor is it split.

1 shows a side view of the hammer (connected to the handle by a number according to the invention) and FIG. 2 is a plan view and FIG.

The solution is described by way of example with a hammer 8; A wooden shaft 2 is embedded in the hammer body whose through hole 4 has the same profile at its entire height. In the edge of the through hole 4, at its entire height / an inclined groove is formed.

The axis of the groove 5 is inclined to the central axis of the through hole 4. In this groove Ji, a locking device of 3, in the size given by the diameter of the groove J, is driven over the entire height of the through-hole 4, thus ensuring that 3i is half the diameter in the groove Ji and half in the shaft 2.

The inclined groove 5 is made in the planar part 6 of the through hole 4 of the hammer 1, respecting this plane 6 during manufacture, the width of the planar part 6 being at least twice the width of the inclined groove.

Disassembly of the hammer (in the case of breaking of the shaft) is carried out by punching 3 from the groove 5, then the rest of the shaft 2 is ejected from the through hole 4 of the hammer 1.

A secure connection according to the invention can also be achieved by using a pin other than a circular cross-section or a screw ¹ , either cylindrical or conical.

This connection method can also be used for other hand-held tools, such as axes, hoes, hoes, pickaxes, chisels and the like. For heavy-weight tools, the inclined groove 5 can be made on both sides of the through hole 4.

Claims (2)

OBJECT OF THE INVENTION A working tool-to-hand connection, characterized in that at least one oblique groove (5) / which is also formed in the handpiece (2) is formed in the through hole (4), and in these grooves (5), how many (3) · CS 274111 Bl 2. A method according to claim 1, characterized in that a tool (2) in which the groove (5) is not yet formed is inserted into the tool and then a plurality (3) is inserted into the groove (5) formed in the tool. that you create at the same time! a groove (5) in the shaft (5) _e 1 drawing