JPH06114750A - Screw feed guide for connecting screw driver - Google Patents

Abstract

PURPOSE:To prevent improper screw feed such as screw hooking and feed amount short, relating to a connecting screw driver used as a tool for tightening a screw of a connecting screw band previously built in a manner of one row in a resin-made band. CONSTITUTION:A pair of guide walls 13a, 13b for retaining a band 18 in a thickness direction and a pair of side walls 14a, 14b for retaining moving in a width direction are provided in a screw feed guide 12 for holding a connecting screw band 16, and a slope 15 is provided in a connection part between the guide walls 13a, 13b and the side walls 14a, 14b in the vicinity of an introducing port 21, to eliminate a notch which is a cause of hooking a screw. A part is provided where a space of the guide walls is two times or less the thickness of the band 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting screw driver used as a tool for tightening screws which have been previously implanted in a resin band in a row.

[0002]

2. Description of the Related Art FIG. 3 shows a shape of an inlet of a connecting screw band of a conventional screw feed guide. The connecting screw passes through a groove formed by a pair of guide walls 13a and 13b that regulates the movement of the strip in the thickness direction and a pair of side walls 14a and 14b that regulates the movement of the strip in the width direction. , This was my guide. Further, in the vicinity of the inlet, the guide wall and the side wall were shaped like a trumpet with a wide inlet and a narrow outlet.

[0003]

However, in the conventional screw feed guide, there are notches 19 at four corners of the trumpet-shaped side wall and the guide wall near the introduction port of the connecting screw band, and the main body while the connecting screw driver is in use. When tilted, the screw 17 was caught in the notch 19 and the connecting screw band could not be fed smoothly.

Further, as shown in FIG. 4, the pair of guide walls 1
The gaps B of 3a and 13b were 4 to 5 times the thickness of the strip 18, and due to the looseness, the screw 17 was prone to tilt in the screw feed guide, and the screw tilt angle θ was large. Therefore, the above-mentioned catch around the inlet was more likely to occur.

An object of the present invention is to smooth the screw feed of the screw feed guide and improve the reliability of the connecting screw driver.

[0006]

The above object can be achieved by forming the guide wall and the side wall on the trumpet of the introduction port of the screw feed guide by a smooth slope having no notches or steps.

Further, the gap between the pair of guide walls facing each other of the screw feed guide is set to not more than twice the thickness of the band of the connecting screw band, and the gap between the guide wall and the band is reduced.

[0008]

With the screw feed guide constructed as described above, even if the connecting screw driver main body is tilted while the screw is tightened (see FIG. 2), even if the screw 17 tilts near the introduction port of the screw feed guide 12, the tilt It is smoothly fed into the groove portion by 15 and is not caught by the guide wall 13b or the side wall 14b.

Also, the inclination of the screw 17 at the inlet is
As shown in FIG. 5, since the gap between the guide walls 13a and 13b and the band 18 is small, the screw tilt angle θ is small and can be reduced.

[0010]

EXAMPLES The present invention will be described below with reference to examples. FIG. 6 shows an embodiment of the connecting screw driver of the present invention. When a switch 6 built in the handle 5 is turned on, an electric motor portion 1 rotates an electric motor 2 in a housing 20, and its rotational operation is reduced by a speed change gear (A) 3 and a speed change gear (B) 22. Then, the bit 4 is transmitted to the socket 25 via the claw (A) 23 and the claw (B) 24 to rotate the bit 4.
On the other hand, by pushing the electric motor unit 1 forward and pushing the sliding member 8 biased by the spring 10 into the casing 7, the sprocket 9 is rotated by the action of the feed pawl 26, and the connecting screw band 16 is fed. , The screws 17 are set in place.
The bit 4 continues to move forward, and the screw 17 is screwed into the mating member, and the work is completed.

Here, the connecting screw band 16 is a resin band having a length of about 60 cm in which screws 17 are planted at regular intervals. In order to stably feed this into the insertion port 11 of the sliding member 8. A screw feed guide 12 is provided at the bottom of the housing 20 to align the connecting screw bands 16. In the screw feed guide 12, the shape of the guide wall and the side wall according to the present invention is formed by a plastic molded product. The operation is as shown in FIG.
Even if the screw 17 falls down due to tilting of the body, the inlet 2
The connecting screw band is smoothly fed by the slope 15 provided in the vicinity of 1, and the guide walls 13a, 13b and the side walls 14a, 1
4b is not caught.

As shown in FIG. 5, the space between the guide walls is
The thickness is 1.5 to 2 mm, which is less than twice the thickness of the band (1.2 mm), and the screw tilt angle is held at a maximum of about 5 °, so that the screw 17 can be fed more smoothly through the inlet 15.

[0013]

According to the present invention, since the connecting screw band can be smoothly fed at the time of screw tightening work, screw feeding failure such as the screw not being fed or being not set at a predetermined screw position is eliminated. It greatly contributes to the improvement of product reliability.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a screw feed guide of a connecting screw driver according to the present invention.

FIG. 2 is a perspective view in which a connecting screw band is attached to the screw feed guide according to the present invention.

FIG. 3 is a perspective view of a prior art screw feed guide.

FIG. 4 is a cross-sectional view of a prior art screw feed guide.

FIG. 5 is a cross-sectional view of a screw feed guide according to the present invention.

FIG. 6 is a sectional view showing an embodiment of a connecting screw driver equipped with a screw feed guide according to the present invention.

[Explanation of symbols]

1 is an electric motor part, 2 is an electric motor, 3 is a speed change gear (A), 4 is a bit, 5 is a handle, 6 is a switch, 7 is a casing, 8 is a sliding member, 9 is a sprocket, 10 is a spring, 11 is an insertion opening. , 12 is a screw feed guide, 13 is a guide wall, 14 is a side wall, 15 is a slope, 16 is a connecting screw band, 1
7 is a screw, 18 is a band, 19 is a notch, 20 is a housing, 21 is an inlet, 22 is a speed change gear (B), 23 is a claw (A), 24 is a claw (B), 25 is a socket, 26 is a It is a feed claw.

Claims (2)

[Claims] 1. An electric motor is arranged on the distal end side, a handle is formed at the base end, a speed change gear is arranged between the electric motor and the handle, and the screw is rotationally driven by the electric motor via the speed change gear. An electric motor part equipped with a bit that performs a tightening action,
A sliding member located at the front end of the bit and holding a connecting screw band in which screws are planted in a row in a row at a constant interval on a resin band, and a spring so that the sliding member always protrudes from the front end of the electric motor unit for a specific length. Of the sliding member, and a casing that supports the sliding member so that the casing is biased toward the upper part of the electric motor when the screw is tightened.
In order to stably feed the connecting screw band to the feeding mechanism part of the sliding member, the connecting screw driver comprises a sending mechanism that sequentially sends the screw attached to the connecting screw band to a predetermined position of the sliding member for each reciprocation. A screw feed having a groove formed by a pair of guide walls attached to the lower part of the casing or the electric motor section for suppressing the movement of the band of the connecting screw band in the thickness direction and a pair of side walls for suppressing the movement of the band in the width direction. In the guide, at the inlet that serves as an inlet for the connecting screw band,
The pair of guide walls have a trumpet shape in which the interval is gradually narrowed from a wide width to a narrow width, and a slope portion that is smoothly continuous without interruption is provided at a connection portion with the pair of side walls. A screw feed guide for a connecting screw driver. 2. A portion having a thickness not more than twice the thickness of the strip is formed in a space between a pair of guide walls facing each other, which form a groove for pressing the movement of the connecting screw strip of the screw feed guide and regulate the movement in the thickness direction of the strip. A screw feed guide for a connecting screw driver characterized by being provided.