JPS599819Y2 - screw driver nose - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the nose of a screw driving machine.

Conventionally, automatic screw driving machines have large and complicated structures, making them unsuitable for one worker to easily perform outdoor work.

It may be suitable for use in places where equipment is available, such as factories, but if it is not possible or the space where screws need to be driven is narrow, a handy device becomes necessary.

Additionally, loading screws into an automatic screwdriver is a cumbersome task.

It is known that a hole is provided upstream of the screw passage in the nose and the screw is loaded from there, but if the screw size is long, loading becomes difficult, and if the screw size is short, the position of the screw is unstable on the screw passage. The work efficiency is poor because the product is facing the wrong direction.

For this reason, some have a structure in which a chute is provided diagonally rearward from the nose, but this complicates the nose structure and causes problems such as clogging of screws in the chute, or increases the size of the chute and is not convenient.

The purpose of the present invention is to provide a nose that can be removably attached to the main body of a screwdriver equipped with a bit and its driving part.This nose is small, easy to load screws, and has a simple structure. To provide a simple and convenient screw driving machine.

In order to achieve such an object, the present invention includes a mounting part that can be removably attached to the tip of a screw driving machine body having a bit and its driving part, and a sliding part in the axial direction of the bit. A movably supported nose block and a pair of chucks that abut each other at the tip of the nose block to hold the screw and open when the screw is pushed in by a bit. A groove extending approximately along the bit axis is formed on the side surface of the tips of the pair of chucks, and an opening leading to the bit guide hole is provided at the rear of the groove. A screwdriver nose is provided which is provided with a forwardly projecting pad.

This nose has no complicated structure, and the shoe 1.
Since the screw driver has no protruding parts and is small in size, it is easy to handle, and a handy screw driver can be obtained by using a small screw driver main body.

To load a screw, simply push it into the groove with your finger, and the loaded screw remains stable regardless of its size, improving work efficiency.

Additionally, the pad provided at the tip of the chuck ensures reliable positioning of the screw driver.

This pad has a rounded tip for opening and closing the chuck.

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

FIG. 1 shows a side view of the 7's according to the present invention.

The nose is roughly divided into a cylindrical attachment part 1 to the screw driving machine body (not shown for convenience of explanation), a nose block 2 connected to this attachment part and sliding on this attachment part in the axial direction,
There is a screw holding portion 3 which is attached to the tip side of the nose block and is adapted to hold and drive the screw S.

The mounting part 1 is threaded on the inside and has a fixing locking screw 4 at its end so that it can be connected and fixed to a bit mounting part of a screw driving machine, whereby the entire nose is removably mounted on the screw driving machine.

This attachment part can be shaped appropriately to match the screw driver to which it is attached.

The mounting portion 1 has a slide groove 5 extending in the axial direction on its side surface.

The rear part of the nose block 2 has a hollow cylindrical shape with an inner diameter slightly larger than that of the mounting part, and a pin 6 is fixed to the rear end and its tip extends into the slide groove 5 to attach the nose block 2.
It guides the movement of the nose block 2 in the axial direction on the mounting part 1, restricts the length of the movement, and further prevents rotation of the nose block 2 around the mounting part 1.

A spring 7 is provided on the inner surface of the nose block 2, which constantly urges the nose block away from the mounting part, so that unless an external force is applied, the pin 6 will move as shown in FIG. It stops at a position where the tip abuts the front end of the slide groove 5.

The front part of the nose block is shaped like a flat rectangular parallelepiped, as shown in the drawings (Figures 1, 2, and 3), and the screw holding part 3 is attached thereto.

A bit guide 8 having a guide hole for guiding the bit B extending from the screw driving machine body is provided in the front part of the nose block, and the rotated bit B maintains its rotation in the axial direction. It is possible to move.

A pair of chucks 9 forming the spring holding portion 3 are attached to both sides of the guide 8 so as to be pivotable by pins 10.

The tips of the chuck 9 are in contact with each other, and this is caused by a spring 14 provided between the protrusion 13 at the rear end and the side of the guide 8.
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Each tip of the chuck 9 is grooved so that a hole 15 extending continuously from the guide hole is formed in front of the guide 8.

A pad 16 is attached to each end of the chuck 9 to facilitate positioning of the nose of the screw driver.

As shown in the figure, this pad 16 protrudes from the chuck 9 by an appropriate length and has a round shape to facilitate opening and closing of the chuck.

The holes 15 formed in the tips of the chucks that abut each other have a portion adjacent to the guide 8 that is approximately the same diameter as the hole in the guide 8, and a tip portion that has a small diameter so as to hold the screw S.
The small diameter portion and the large diameter portion are continuous by a tapered portion 17.

Due to this tapered portion, the head H of the screw S pushed out by the bit B opens the tip of the chuck 9, and the screw can be driven.

As shown in FIG.
Groove 18 is marked.

Also, as shown in FIG. 6, there is a hole 1 behind this groove 18.
5, the opening 1 has a width smaller than the diameter of the large diameter part of the hole 15.
9 is provided to prevent the loaded head of the snake from flying out.

Further, above the ■groove 18, there is formed a U groove 25 which is continuous with the V groove and tapers (FIGS. 4 and 6).

This U-groove 25 has a narrow bottom width with the bottom surface of the groove 18, and the width of the upper part is also made, for example, about 15 mm, so that when the screw S is pushed in, the fingers will not be caught by the chuck.

■With the groove 18, the U groove 25, and the opening 19, the screw S is placed with its head H above the opening 19 and its shaft along the ■groove 18.
By simply pushing this screw with a thumb or the like, the chuck 9 opens and the screw is loaded into the hole 15 while maintaining its direction.

It is preferable that the small diameter portion of the hole 15 has an inner diameter slightly smaller than the diameter of the screw shaft, but it is permissible even if it is slightly larger than the screw shaft diameter and has some play.

Inside the rear portion of the nose block 2, a rod 21 of a stopper 20 extends toward the front end surface of the mounting portion 1.

This situation is shown in FIG. The protruding length of the rod 21 of the stopper 20 is adjusted by a screw 22 at the opposite end.

This stopper limits the pushing length of the nose block 2, and adjusts the screwing depth of the screw S by the bit B.

According to the present invention, a small and simple nose is provided, thereby obtaining a convenient screw driving machine.

In particular, the pad at the tip of the chuck ensures reliable positioning of the screw driver.

[Brief explanation of the drawing]

Fig. 1 is a side view of the nose according to the present invention, Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, Fig. 3 is a rear view of the nose, Fig. 4 is a front view of the nose, and Fig. 5 is a cross-sectional view of the nose according to the present invention. FIG. 2 is a sectional view taken along line BB in FIG. 2, and FIG. 6 is a plan view of the tip of the nose. 1... Mounting part, 2... Nose block, 3... Screw holding part, 4... Lock screw, 5... Slide groove,
6... Pin, 7... Spring, 8... Bit I guide, 9... Chuck, 10... Pivot pin, 14...
Spring, 15... Chuck hole, 16... Pad, 1
8...■Groove, 19...Opening, 20...Stopper,
25...U groove.

Claims (1)

[Claims for Utility Model Registration] 1. A mounting part that can be removably attached to the tip of a screwdriver body that has a bit and its driving part, and a support that is slidable in the axial direction of the bit on this mounting part. The tip of the nose block and the pair of chucks that hold the screw by abutting each other at the tips of the nose block and open when the screw is pushed in by the bit, A V-groove extending approximately along the bit axis is formed on the side surface, and an opening communicating with the bit guide hole is provided at the rear of the V-groove, and a pad protruding forward is provided at the tip of each chuck. Installed screw driver nose. 2. The nose according to claim 1, wherein the pad has a rounded tip.