JPS5917581Y2 - 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 perform outdoor work easily.

It may be suitable for use in places where equipment is available, such as factories, but if the place where equipment is not available or the space where screws need to be driven is narrow, a handy one will be needed.

Also, loading screws into a 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 on the screw passage becomes unstable. Otherwise, it may turn in the wrong direction, resulting in poor work efficiency.

For this reason, some devices have a structure in which a chute is provided diagonally backward from the nose, but this complicates the nose structure, causes screws to become clogged within 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 structure It's also very simple.

In order to achieve this objective, the present invention includes a mounting part that can be removably attached to the tip of a screwdriver body having a bit and its driving part, and a shaft of the bit of the screwdriver attached to this mounting part. It consists of a nose block that is supported so as to be able to slide in the direction, and a pair of chucks that abut each other at the tips of this nose block and hold the screws. A spring means is provided between the chuck and the nose block so that the tips are always in contact with each other, and a V-groove extending approximately along the bit axis is formed on the side surface of the pair of chuck tips that are in contact with each other. An opening leading to the bit guide hole is provided at the rear of the V-groove, and the nose block that covers the side surface and the upper part of the chuck in which the groove is formed has a bottom width with the groove surface as the bottom surface. A screw driver nose is provided having a narrow tapered groove formed therein.

This nose has no protruding parts such as a chute, and provides a screw driving machine that can be operated even in narrow spaces.

In particular, a tapered U-groove is formed above the V-groove, making it easy to load screws, and the bottom width of the U-groove is narrow so that fingers, etc., will not be caught when pushing in.

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

FIG. 1 shows a side view of the nose of the present invention.

The nose is roughly divided into a cylindrical attachment part 1 to the screw driver body (not shown for convenience of explanation), a nose block 2 that is connected to this attachment part and slides on this attachment part in the axial direction,
The screw holding part 3 is attached to the tip side of the nose block and is configured to hold and drive a 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.

A slide groove 5 extending in the axial direction is formed on the side surface of the mounting portion 1 .

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 shown in the drawing (Figure 1.2.3)
As shown in the figure, it is made into a flat rectangular parallelepiped shape, and the sash holding part 3 is attached thereto.

A bit guide 8 is provided in the front part of this nose block, and the bit guide 8 is provided with a guide hole for guiding the pin (B) extending from the screw driving machine body. It is possible to move.

A pair of chucks 9 constituting the spring holder 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 is formed in front of the guide 8 so as to extend continuously to the guide hole.

Pads 16 are attached to both edges of the tip of the nose block 4 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.

The hole 15 formed at the tips of the chucks that are in contact with each other has a portion adjacent to the guide 8 having a diameter approximately equal to the hole diameter of the guide 8, and a tip portion having 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, allowing the screw to be driven.

As shown in FIG.
A groove 18 is formed.

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

Further, above the ``groove 18'', a U-groove 25 is formed which is continuous with the ``groove'' and tapers.

(Figures 4 and 5゜7).

This U-groove 25 has a narrow bottom width with the groove 18 as the bottom surface, and the width of the upper part is also made, for example, about 15 mm. is designed so that it does not get 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 pressing this screw with your thumb, the chuck 9 will open and the screw will be loaded into the hole 15 while maintaining its orientation (Figure 8).
.

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 attachment 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 pitch hB.

According to the present invention, a screw driving machine that can be operated even in a narrow space is obtained, and in particular, the U-groove prevents fingers from getting caught when loading screws.

[Brief explanation of the drawing]

Figure 1 is a side view of the nose according to the present invention, Figure 2 is a sectional view taken along line A-A in Figure 1, Figure 3 is a rear view of the nose, Figure 4 is a front view of the nose, and Figure 5 is the nose. 6 is a sectional view taken along line BB in FIG. 2, and FIGS. 7 and 8 are schematic perspective views showing how the chuck is loaded with screws. 1... Mounting part, 2... Nose block, 3... Screw holding part, 4... Lock screw, 5... Slide groove,
6...pin, 7...spring, 8...bit guide,
9...Chuck, 10...Pivot pin, 14...Spring, 15...Chuck hole, 18...■Groove, 19...
...Opening, 20...Stopper, 22...Stopper adjustment screw, 25...U groove.

Claims (1)

[Scope of utility model registration request] A mounting part that can be removably mounted on the tip of a screwdriver body having a bit and its driving part, a nose block supported by the mounting part so as to be slidable in the axial direction of the bit, and this nose block. A pair of chucks hold the eagle by abutting each other at their tips, and the chucks are pivotally supported by a nose block, and a spring means is provided between the rear part of the chuck and the nose block, so that the tips of the chucks are in contact with each other. A groove extending approximately along the axis of the bit is formed on the side surface of the abutting tips of the pair of chucks.
An opening leading to the bit guide hole is provided at the rear of this groove, and a tape groove with a narrow bottom width whose bottom is the groove surface is formed in the nose block that covers the side surface and top of the chuck where the groove is formed. The nose of the screwdriver that is being formed.