JPH0647005Y2 - Handheld automatic punching tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly relates to a hand-held automatic punching tool that uses impact force due to magnetic force used for punching leather products and the like.

(Prior Art) A hole punching machine for leather that has been conventionally used has been developed for mass production. However, because of the trend toward higher quality leather products, small quantities of products with different joints between leathers and different places for threading straps are required, and conventional machines that make continuous holes at certain places cannot handle this. As a result, punching holes with a manual punch and a hammer were inefficient, resulting in poor work efficiency, and the position of the punch on the leather was misaligned with a hammer.

(Problem to be Solved by the Invention) The problem to be solved by the present invention is to make the hand-held automatic punching tool work-free and efficient.

(Means for Solving the Problem) Means for solving the above problems by the present invention is as follows. A coil portion is externally fitted to a central portion in the longitudinal direction of a cylindrical holder having a ventilation hole at the upper end, and an outer surface upper end of the coil portion is provided. A means for energizing the coil is installed in the holder, a cylindrical hammer is housed inside the holder, and the lower end of the hammer abuts the upper end to house the spring. It is seated on the holder head that is fitted and fixed, and the punch is installed in the guide hole penetrating the axis of the holder head, and one end of the spring fitted on the punch is locked to the upper end of the punch and the other end is attached to the holder head. A guide groove is provided vertically on the peripheral surface of the holder head, the guide groove penetrating through the guide hole in the axial direction, and the stopper is disposed on the punch with the upper end of the guide groove as the stopper end. Is.

(Operation) According to the above means, the holder head and the punch cannot move relative to each other in the contracting direction (compressing direction) via the stopper, so that the punch can be accurately positioned at the punching position while the holder is gripped. Can be pressed. Therefore, the contact between the upper end of the punch and the lower end of the hammer is constant regardless of the pressure contact state before drilling.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. A cap 3 having a vent hole 2 in the center is fitted and fixed to the upper end of a cylindrical holder 1, and a holder head 4 is attached to the lower end. Inner fitting and fixing, and coil part 5 is fitted and fixed to the outer periphery of the central portion in the axial direction (the inner surface of the peripheral wall on which the coil portion 5 is externally fitted may be locally thinned, or slits may be arranged on the peripheral wall. .),
The outer periphery of the coil portion 5 is covered with an insulating material 6, and a switch 7 is disposed on the upper portion as a means for energizing the coil portion 5.
The wiring to the coil and the wiring to the coil portion 5 are housed in a cord and connected to the plug 8 at the tip. Inside the holder 1, a spring 9 is mounted on the upper end of the holder head 4, and a cylindrical hammer 10 is mounted on the upper end of the spring 9 to be housed therein. A guide hole penetrating the center of the holder head 4 is provided. 11
The punch 12 is axially inserted through the punch 12, and one end of the spring 13 externally fitted to the punch 12 is locked to the retaining ring 14 externally fitted to a required position of the upper end portion of the punch 12 and the other end is fitted to the upper end of the holder head 4. The lower end of a latch 15 as a stopper that is locked and seated on the upper surface of a retaining ring 14 that is fitted onto the upper end of the punch 12 and hangs down is bent into an L shape, and the L-shaped tip end thereof is guided into a guide hole 11.
It is formed by engaging with the upper end of a guide groove 16 provided vertically on the upper part of the.

In the hand-held automatic punching tool a thus constructed, the AC power source is input by connecting the plug 8 to the terminal of the electric control box (not shown), and a predetermined magnetic force is set by the magnetic force setting dial to be set in the used state. A processing worker grasps the holder 1 accurately by abutting the tip of the punch 12 on a punched portion such as leather and pressing the switch 7 with an index finger, an electric current is instantaneously applied to the coil 5 by an electric circuit for applying one pulse of AC power. Flow to
A predetermined electromagnetic force is generated in the axially downward direction of the holder 1, and the hammer 10 is instantaneously pulled in by the electromagnetic force, and the punch 10 is punched.
The upper end of 12 can be hit and the required punching can be performed accurately. During the movement of the hammer 10, air and air are sucked and exhausted from the ventilation hole 2, so that the hammer 10 does not interfere with the striking stroke and the ascending stroke of the spring 9, and each hammer strikes even after a long time of use. The heat of the coil to be retained does not stay in the holder 1. As a stopper for positioning the rising end of the punch 12, instead of the latch 15, a pin 17 driven into the shaft of the punch 12 from the guide groove 16 of the holder head 4 can be used instead, as shown in FIG.

(Effect of the Invention) As described above, according to the present invention, the punch can be accurately positioned regardless of the drilling point, and the switch can be operated with a tight grip, so there is no shake and the accuracy of drilling is improved. It contributes to efficiency.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a hand-held automatic punching tool a according to the present invention, and FIG. 2 is an explanatory view showing another embodiment of positioning the punch and the holder head. In the figure, 1 is a holder, 2 is a ventilation hole, 4 is a holder head, 5 is a coil portion, 6 is an insulating material, 7 is a switch, 9 and 13
Is a spring, 10 is a hammer, 11 is a guide hole, 12 is a punch, 15 is a latch, 16 is a guide groove, and 17 is a pin. a is a hand-held automatic punching tool.

Claims (1)

[Scope of utility model registration request] 1. A coil holder is externally fitted to a central portion of a cylindrical holder having a ventilation hole at its upper end in the longitudinal direction, and means for energizing the coil portion is provided at the upper end of the outer surface of the coil portion. A cylindrical hammer is stored, and the lower end of the hammer is brought into contact with the upper end to store a spring. The lower end of the spring is seated on a holder head that is internally fitted and fixed to the tip of the holder, and the spring is inserted through the axis of the holder head. The punch is mounted in the guide hole, one end of the spring fitted on the punch is locked to the upper end of the punch, and the other end is locked to the holder head. A hand-held automatic punching tool in which a guide groove penetrating the guide hole is vertically provided, and the stopper is disposed at the punch with the upper end of the guide groove as the stopper end.