JP2018062165A - Boring depth regulation stopper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stopper for regulation of a hole depth used for a work for boring a hole, in which a spawn block and a forming bacteria for a raw wood is implanted in shiitake mushroom cultivation, by an electric drill, in which a drill is not rotated by a reaction due to biting of a gimlet, and a screw part to be fitted to the electric drill is not broken.SOLUTION: A body shape 2 of a stopper is so made as to be a frame shape of a frame over a rotation axis so as not to receive a biased load, thereby preventing breakage of a screw part. Further, a tip of the stopper is provided with a spring 3 which is moderately repelled from a force advancing by cutting of a gimlet 6 and a pressing hand force, and a contact face 10 of the stopper is so made as to be projected from the conventional whole circumferential surface and to have a spike effect, thereby preventing a drill 1 from rotation. The spring 3 causes the gimlet 6 to act in a drawn direction by a repulsive force of the spring 3 after the gimlet 6 advances to the stopper 2 and slips, and therefore, can achieve improvement of a work.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an operation for opening a hole for planting a seed piece or a forming fungus into a log in shiitake cultivation with an electric drill.

  This drilling operation can be performed manually with a dedicated hammer, but is generally performed by drilling with a drill using an electric drill.

  A stopper is required to drill holes with the appropriate depth for seeds and mushrooms to be planted in the shiitake logs. It was a simple screw and fixed to the electric drill body.

  Depending on the thickness of the raw wood, there are 30 to 40 holes per hole, and the number of holes in the entire plantation area is considerable. However, the drilling of the log is a difficult task because of the high number of drilling.

  In addition, when the drill body is turned by the reaction rotation when the drill bites in or the number of drilling is increased, there is also a dangerous problem such as breaking the root portion of the rod screw that fixes the stopper where the stress is concentrated.

  In order to solve the above-mentioned problem, the present invention does not use a conventional stopper that is fixed and supported at a position where a single load is supported at a single point at a position away from the rotary shaft, and does not become a single load across the rotary shaft. A frame shape consisting of a frame that can be fixed with

  A spring was provided at the tip of the stopper.

  The contact surface of the stopper has a protruding shape.

  By changing the shape of the stopper main body, the applied force is not a single load and will not break.

  The tip spring is compressed by the advance force of the drill, but when the drill reaches the stop position and the drill is idle, a force in the extraction direction acts due to repulsion, and the work becomes light.

  If the tip of the stopper is a protrusion, it will be a spike effect that prevents the drill body from turning due to the reaction of the bite.

Side view showing the outline of the present invention Plan view showing the outline of the present invention It is a figure which shows the shape of the stopper of a conventional system. It is a figure which shows the attachment state of the stopper of a conventional system. Side view of the stopper of the present invention Top view of the stopper of the present invention Rear view of the stopper of the present invention

  Embodiments of the present invention will be described below with reference to the drawings.

  First, as shown in FIGS. 3 and 4, a steel round bar is hit by bending a part of the motor case front edge cover of the electric drill 1 in a flange shape, and the contact surface is bent into a loop shape. It was a simple method of forming and fixing the stopper 8 with a screw screw 9 through a stopper 8 having a mounting end.

  In the embodiment of the present invention, it is fixed to the circular boss portion of the tip bearing of the electric drill 1 with the screw 5 of the clamp band portion of the stopper body 2.

  A spring seat 4 is provided on the distal end side of a frame-shaped stopper body consisting of a pair of frames so as to straddle the axis of rotation of the drill chuck 7 that clamps the drill 6, and the spring has a spring 3. The rebound strength is determined considering the self-advancing force and the force of manually pressing the electric drill.

  The front end portion 10 of the two frames made of a pair is a protruding plate having an appropriate width and sufficient strength, with the contact surface of the stopper being not the entire peripheral surface.

  The distance between the cutting edge of the drill 6 and the contact surface of the tip 10 of the stopper is an appropriate hole depth. When the hole reaches the specified depth and the drill is idle, the spring repulsive force acts on the side where the drill is pulled out. Will do.

  In the embodiment, the main body 2 has a frame shape of two frames, and the entire body 2 is not enclosed so that the clamp of the drill 6 to the drill chuck 7 is not hindered. The purpose of this is to make sure that there is no hindrance to the drilling of the shavings, as well as the gap hole with the drill, but the number and shape of the frames are not particular.

  In the embodiment, the stopper main body is fixed to the existing electric drill 1 by a band-shaped clamping method using a circular boss of the drill rotation bearing portion. However, the electric drill main body is fixed by providing a mounting screw. If it is a method, it can be simplified.

1 Electric drill 2 Stopper body 3 Spring 4 Spring seat 5 Clamp screw 6 Drill 7 Drill chuck 8 Conventional stopper 9 Conventional mounting screw 10 Stopper tip

Claims (2)

  Drilling depth that can be attached to and detached from an electric drill with a coil spring at the tip of the frame-frame-shaped stopper body that receives a uniform load across the rotation axis of the drill, and has a stopper-contacting surface with a protruding hole depth restriction Standard stopper.   The stopper according to claim 1, wherein a position where the coil spring is compressed and brought into close contact is defined as a stopper position for regulating hole depth dimensions.

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