JPS6154548B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the nose of an automatic 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 on the screw passage becomes unstable. Otherwise, it may end up in the opposite direction, resulting in poor work efficiency. 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 the screws to become clogged within the chute, or increases the size and is not convenient.

SUMMARY OF THE INVENTION An object of the present invention is to provide a nose that can be detached and attached to a screw driving machine body equipped with a bit and its driving part, and this nose is small in size, easy to load screws, and has a structure. It's also very simple.

In order to achieve such an object, the present invention provides 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 shaft of the screw driving machine bit attached to this mounting part. It consists of a nose block supported so as to be able to slide in the direction, and a pair of chucks that abut each other at the tip of the nose block and hold the screw. A spring means is provided between the nose block and the nose block so that the tips thereof are always in contact with each other.
A V-groove extending substantially along the bit axis is formed on the side surface of the tip of the pair of chucks, and a nose is provided at the rear of the V-groove with an opening communicating with the bit guide hole. This nose can be attached to any screw driving machine, and there is no protruding part such as a chute on the nose, and if a small screw driving machine main body is adopted, it becomes a handy screw driving machine.
Further, loading the screw can be done by simply pushing it in from the V-groove, and a stable posture can be maintained regardless of the screw size.

The tip of the nose block is provided with a pad that protrudes from the tip of the chuck, making it easy to position the nose of the screw driver.

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 driving machine 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 its axial direction, and a nose block 2 that is connected to this attachment part and slides on this attachment part in the axial direction. It consists of a screw holding part 3 which is attached to the tip side of the nose block and is adapted to hold and drive a screw S.

The mounting part 1 is threaded on the inside and has a locking screw 4 at its end so that it can be fixedly connected to the bit mounting part of a screw driver, so that the entire nose can be removably mounted on the screw driver. 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 the mounting part, and a pin 6 is attached to the rear end.
is fixed and its tip extends into the slide groove 5 to guide the movement of the nose block 2 in the axial direction on the mounting part 5 and to regulate the length of the movement. It prevents rotation. 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 (1st, 2nd, 3rd
As shown in the figure, it is made into a flat rectangular parallelepiped shape, and the screw holding part 3 is attached thereto. A bit guide 8 is provided in the front part of this nose block and has a guide hole for guiding the bit B extending from the screw driving machine body, so that the rotated bit B can move in the axial direction while maintaining its rotation. It's getting old.

A pair of chucks 9 constituting the screw holding portion 3 are attached to both sides of the guide 8 so as to be pivotable by pins 10. The tips of the chucks 9 abut each other, and this is achieved by a spring 14 provided between a protrusion 13 at the rear end and the side of the guide 8. Each tip of the chuck 9 is grooved so that a hole 15 is formed in front of the guide 8 and extending continuously from 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. This pad 16 is connected to chuck 9 as shown in the figure.
It protrudes by an appropriate length.

Hole 1 formed at the tips of the chucks that abut each other
5, the part adjacent to the guide 8 is made almost the same as the hole diameter of the guide 8, and the tip part has a small diameter so as to hold the screw S, and the small diameter part and the large diameter part are connected by a tapered part 17. Continuous. 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. 5, each side surface of the tip of the chuck on the axis side is inclined, and a V-groove 18 is formed by the two chucks in contact with each other. Further, as shown in FIG. 5, an opening 19 communicating with the hole 15 and having a width slightly smaller than the diameter of the large diameter portion of the hole 15 is provided at the rear of this V groove 18, so that the head H of the loaded screw can protrude. is prevented.

Due to the V-groove 18 and the opening 19, the screw S can be placed with its head H on the opening 19 and its shaft along the V-groove 18, and the screw can be easily pressed with a thumb or the like to open the chuck 9.
The opening screw is loaded into the hole 15 while maintaining its orientation. 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 if it is slightly larger than the screw shaft diameter and has some play.

According to the present invention, it is possible to obtain a small and easy-to-handle nose that can be attached to any screw driving machine, has no protruding part for loading screws, allows easy loading of screws, and has a stable posture. Because of this, work efficiency is high.

[Brief explanation of the drawing]

FIG. 1 is a side view of the nose according to the present invention, FIG. 2 is a sectional view taken along 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. FIG. 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...V groove,
19...Opening.

Claims (1)

[Claims] 1. A mounting part that can be removably mounted on the tip of a screwdriver main body having a bit and its driving part, and a mounting part that is supported by the mounting part so as to be slidable in the axial direction of the bit. It consists of a nose block and a pair of chucks that abut against each other at the tip of the nose block to hold the screw, and the chucks are pivoted to the nose block and a spring means is provided between the rear part of the chuck and the nose block. The tips of the chucks are in contact with each other, and a V extending approximately along the axis of the bit is formed on the side surface of the tips of the pair of chucks that are in contact with each other.
The nose of a screw driver has a groove formed therein and an opening communicating with a bit guide hole at the rear of the V groove. 2. The nose structure according to claim 1, wherein the tip of the nose block is provided with a pad that protrudes from the tip of the chuck, thereby making it easy to position the nose.