JP2008279575A - Bar steel cutting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem when cutting a bar steel by a bar steel cutting machine, wherein a cutting blade is broken if the cutting work is performed without noticing that the position of a bar steel with a movable cutting blade moving in the direction of opposing fixed cutting blades being brought into orthogonal contact therewith is inclined by a mistaken insertion of a worker. <P>SOLUTION: A bar steel cutting machine has an top face stopper 10 on a fore end of a projecting shaft 11 juxtaposed to a fixed cutting blade 6 installed on one side end inside a front side part of a head frame body 1. In the top face stopper, the longitudinally slidable projecting shaft via an elastic member 12 parallel thereto is inserted in a through hole formed in the front side part of the head frame body, and has a stopping unit 14 on an outer end of the projecting shaft. The top face stopper suppresses a top face part of a bar steel inserted in a recessed hole 3 formed in an inner part of the head frame body composed of a front part and a rear part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a steel bar cutter that cuts a steel bar placed between a movable cutter provided on a piston rod of a hydraulic cylinder and a fixed cutter whose position is fixed.

  The inventor of the present invention has already completed the invention according to Japanese Patent No. 3423264. As a disadvantage when performing a steel bar cutting operation using a steel bar cutting machine, the present invention has a disadvantage between the movable blade and the fixed blade. After placing the prescribed bar material, when the switch is turned on and the hydraulic piston is driven to start cutting by moving the movable blade, the operator thinks that the bar is in a normal position at right angles to both blades. However, since the steel bar may start cutting without realizing that the steel bar is in a slightly inclined state in the space between the fixed blade and the movable blade during the operation, the hard steel bar will cause the cutting blade to Caused damage.

Japanese Patent No. 3423264

  Therefore, the present invention aims to provide a steel bar cutting machine improved in order to eliminate such drawbacks of the conventional machine.

  In the present invention, an upper surface stopper is provided at the tip of a protruding shaft arranged in parallel with a fixed cutting blade installed at one side end of the front side portion of the head frame body, and this upper surface stopper is moved back and forth via parallel bullets. The projecting shaft that slides into the front frame body is inserted into a through-hole provided in the front side portion of the head frame body, and a stop portion is provided at the outer end of the projecting shaft, and the upper surface stopper includes a front side portion and a rear side portion. The upper surface portion of the steel bar inserted into the recessed hole formed in the inner portion of the head frame body is restrained.

  In the present invention, even when strong resistance is caused by the steel bar crossing between the two cutting blades due to the forward movement of the movable cutting blade sandwiched between the opposed fixed cutting blades, the steel bar is kept by the upper surface stopper during the operation. Since it is surely restrained, it is possible to reliably and smoothly cut a predetermined portion of the steel bar into a right-angled shape without shifting the center portion where both cutting blades intersect.

  Therefore, since the bar steel is always in a stable state at a position orthogonal to both cutting blades, a cutting error with respect to the bar steel is prevented and an accurate cut surface can be configured.

    When using this bar cutting machine, the movable cutting blade operates reliably from the perpendicular direction to the bar steel that is orthogonal to the fixed cutting blade, but during this cutting operation, the bar steel The upper surface portion of the surface is reliably kept in a restrained state by the upper surface stopper.

  Reference numeral 1 denotes a head frame body which is attached to a concave groove provided around the front end portion of the cylinder body 2 by a screw through a ball and an ammunition, and a rod is disposed inside the head frame body which is composed of a front side portion and a rear side portion. A recessed hole portion 3 for inserting a steel material is formed.

  Reference numeral 4 denotes a stopper screw that adjusts the gap width of the concave hole portion 3 through the elastic machine 5 in accordance with the outer diameter of the steel bar a. The stopper screw is separated from the movable cutting blade portion 7 described later in a parallel position. ing.

  Reference numeral 6 denotes a fixed cutting blade provided at one end of the front side portion sandwiching the recessed hole portion 3 inside the head frame body 1, and this fixed cutting blade crosses in the same central direction as the movable cutting blade 7 described later. Relative to the position to perform.

  Reference numeral 7 denotes a movable cutting blade which is movable forward and backward with a one-side vertical portion attached to the center of the tip of the cylinder piston. The lower end of the one-side vertical portion of this movable cutting blade is located at the center of the inner bottom surface of the head frame body 1. It is formed and fitted into the guide groove 8, and the other hook-shaped portion 7 ′ of the movable cutting blade 7 is engaged with a convex step portion 9 provided on one side standing wall of the head frame body 1. It moves forward and backward on the convex step.

  Reference numeral 10 denotes an upper surface stopper provided at the tip of the projecting shaft 11 installed in parallel with the fixed cutting blade 6 installed at one side end of the front side part of the head frame body 1. A projecting shaft 11 that slides back and forth via the machine 12 is fitted into the through hole 13 in the front side portion of the head frame body, and a stop portion 14 is provided at the outer end of the projecting shaft 11.

  Reference numeral 15 denotes a cover body of the machine main body, and a grip handle portion 16 is integrally formed on the cover body, and a battery portion 17 is installed at a lower end portion of the handle portion.

  Reference numeral 18 denotes an activation switch lever provided at a part of the front side of the handle portion 16, and a rear end part of the switch lever is in contact with a return valve lever, and a front end part of the switch lever is in contact with a battery switch.

  The cutting machine of the present invention is a hand-held type equipped with a battery suitable for work at various sites, but since the power source can be used as a power line in work in a factory or on a flat ground, the power source is designed to be a combined type. It will be.

Perspective view from one side of the whole Perspective view from the other side of the whole Action state diagram on one side of main part Other action state diagram in one side part of main part Plan view of main parts Exploded perspective view of the main part

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Head frame body 3 Concave hole part 4 Stopper screw 5 Bullet machine 6 Fixed cutting blade 7 Movable cutting blade 8 Guide groove 9 Convex step part 10 Upper surface stopper 11 Protruding shaft 12 Bullet machine 13 Through hole 14 Stop part

Claims (1)

An upper surface stopper is provided at the tip of the projecting shaft arranged in parallel with the fixed cutting blade installed at one side end of the front side portion of the head frame body, and this upper surface stopper slides back and forth through parallel bullets. The head frame is configured such that the protruding shaft is inserted into a through hole provided in a front side portion of the head frame body and a stop portion is provided at an outer end of the protruding shaft, and the upper surface stopper includes a front side portion and a rear side portion. A steel bar cutting machine characterized in that it suppresses an upper surface part of a steel bar material inserted into a concave hole formed inside the body.

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