JPH085025Y2 - Screw tightener - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is directed to a long connecting strip formed by a strip-shaped sheet or a long connecting strip formed by folding a wide sheet into a strip-like configuration at regular intervals. The present invention relates to a screw tightener that uses a connecting screw having a shaft portion of a screw inserted and supported therein.

(Prior art and its problems) In a screw tightening machine using this kind of connecting band, since the connecting screw is not so long, one end of the connecting screw is connected to the nose member of the screw tightening machine at the time of use. Just attach it to, and most of the other connecting screws are free to hang.

However, the connecting band screw is relatively easily bent due to the weight of the screw. Further, since the side edge of the connecting band is formed with a notch for engaging with the feed claw that constitutes the connecting band supply mechanism, if the connecting band is twisted during screw tightening work, the above-mentioned cut The notch or the shaft portion of the screw is caught in the connecting screw introducing port of the nose member, which causes the supply of the connecting screw to be hindered. In particular, as when tightening the screw by tilting the screw tightener sideways, the inclination of one end side of the connecting band held by the connecting band supply mechanism and the free end of the connecting band hanging downward by gravity. When the inclination of the side is different, twisting is likely to occur and a catching phenomenon is likely to occur. Further, since the free end side of the connecting band swings freely every time the screw tightening machine is moved, it becomes a hindrance during the work and is likely to be twisted.
For this reason, the operator usually needs to hold the free end portion of the connecting screw with one hand.

Therefore, in order to prevent this phenomenon, a tool in which a guide member for a connecting band is formed on the side surface of the tool is known (Japanese Utility Model Publication No. 60-26921). This guide member improved the access to the connection belt supply mechanism, but this time, when the rear connecting screw from the guide member enters the guide member, a catching phenomenon occurs, and after all, the connecting screw is used to some extent. Until the bending state of the connecting band becomes small, the free end portion of the connecting screw must be held with one hand, and workability is not improved so much.

(Object of the Invention) The present invention solves the above-mentioned drawbacks, in particular, the free end side portion of the connecting screw can be sequentially guided to the supply mechanism portion, and the free movement of the connecting screw is regulated to ensure the supply of the connecting screw Another object of the present invention is to provide a screw tightening machine having a guide mechanism for a long connecting screw, which can improve workability.

(Means for Achieving the Purpose) In order to achieve the above-mentioned object, the screw tightener according to the present invention has a connecting screw in which a shaft portion of the screw is inserted and held at a constant interval in a long synthetic resin connecting band. A screw tightening machine for continuously tightening a screw, comprising an adapter main body attached to a driver main body for rotationally driving a driver bit, and a nose supported by the adapter main body so as to be relatively movable in the axial direction of the driver bit. Member and a connecting band supply mechanism provided on the nose member and supplying the connecting screw to the nose member, and a magazine having a semi-disc shaped portion on the side opposite to the screw driving direction is attached to the adapter body. Inside the magazine, a wide connecting band guide path is formed in a horseshoe shape to guide at least most of the connecting band along the outer peripheral side of the magazine. A narrow space is formed in the radial direction for accommodating the shaft portion of the screw on the screw connection band, both ends of the connection band guide path are opened to the outside, and an opening at one end is formed on the nose member. It is characterized in that an opening is formed so as to face the introduction port of the screw and be oriented in the screw driving direction.

(Operation and Effect of the Invention) According to the above configuration, the connecting screw is housed in the magazine through any of the openings at both ends of the magazine. Since one of the openings is opposed to the inlet of the connecting screw formed in the nose member and is formed toward the screw driving direction, the connecting screw between the opening and the nose member is introduced. The connecting screw is not twisted with respect to the mouth, and therefore the notch of the connecting band and the screw shaft portion are not caught in the opening of the connecting screw, so that the connecting screw is fed smoothly.

In addition, since the connecting band guide path is formed in a horseshoe shape along the outer peripheral side of the semi-disk shaped portion inside the magazine, most of the connecting screws are accommodated in the magazine. Further, since the connecting band is accommodated in the wide connecting band guide path and the shaft portion of the screw is accommodated in the narrow space, the shaft portion does not move left and right during the feeding. Therefore, even if a connecting band with a weak waist is used, it does not shake greatly during the screw tightening work and interferes with the work, so that the connecting screw can be supplied smoothly and reliably, and the worker can use one hand. Workability is improved because it is not necessary to hold it.

Furthermore, since both ends of the connecting strip guide path are open to the outside, connecting screws may be inserted from either opening, and it is also possible to use connecting screws with a length that cannot be accommodated in the connecting strip guide path. it can.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a main part of a screw tightening machine. The screw tightening machine is composed of a driver body 1 and an adapter 2, and the screw is continuously tightened by using a connecting screw 3.

The connecting screw 3 is formed by inserting and holding the shaft portion of the screw 5 into the long connecting strip 4 made of synthetic resin at regular intervals.
Includes a long strip-shaped sheet and a thin wide sheet that is folded to increase the rigidity and is formed into a strip shape.

The adapter 2 is attached to and detached from the tip of the driver body 1, and is composed of an adapter body 6 and a nose member 7 slidably provided on the adapter body 6.

A motor that operates by pulling a trigger (not shown) is arranged in the driver body 1, and a driver bit 8 that is rotationally driven by the motor is provided at the tip of the motor.
Is mounted so as to project.

The adapter body 6 accommodates and holds the driver bit 8 therein, and the base portion thereof is detachably formed by being screwed into the driver bit mounting portion 9 at the tip of the driver body 1.

The nose member 7 is supported so as to be movable relative to the adapter body 6 along the axis of the driver bit 8, and is always biased in the protruding direction. Then, the nose member 7 slides in the backward direction approaching the driver body 1 side, and the tip of the driver bit 8 housed in the adapter body 6 at the stroke end thereof slightly projects from the tip of the nose member 7. The adapter body 6 is positioned at the optimum position by the stopper rod 10 and the adjusting ring 11 of the driver bit mounting portion 9.

Next, in the nose member 7, the guide groove 12 of the connecting screw 3 formed in the direction orthogonal to the sliding direction along the axial center of the driver bit 8 and the screw 5 on the connecting band 4 in synchronization with the screw tightening operation. There is provided a connecting band supply mechanism a for sending each one to the extension of the axis of the driver bit 8 in the nose member 7.
This connecting band supply mechanism a is provided with a nose member 7 and an adapter body 6.
By utilizing the relative movement of and, the connecting screw 3 introduced from the inlet 12a of the guide groove 12 is advanced,
It is composed of a one-way clutch 13 and a feed wheel 14. And FIG. 1 and FIG. 3 (a) (b)
As shown in (c), when the nose member 7 moves in the backward direction with respect to the adapter body 6, the sliding shaft 15 of the one-way clutch 13 moves while being guided by the sliding groove 16 of the adapter body 6. It rotates by a certain angle with the. At this time, the one-way clutch 13 is engaged with the feed wheel 14 to rotate, the pawl 17 of the feed wheel 14 is engaged with the notch 18 of the connecting screw 3 at the time of rotation, and the connecting screw 3 is advanced by one screw. Of. 19 is a check claw.

It is known that the coupling band supply mechanism operates when the nose member 7 moves in the protruding direction, and any mechanism may be used.

With the above configuration, the tip of the nose member 7 is a material to be screwed.
When the nose member 7 is moved in the backward direction by pressing it against the surface of 20, the connecting band supply mechanism a is activated during the backward movement, and the tip screw 5a of the connecting screw 3 is sent to a predetermined position of the nose member 7. Then, the tip of the driver bit 8 rotationally driven by the motor is engaged with the head groove of the tip screw 5a. Further, when the nose member 7 moves in the backward direction (arrow direction), the tip screw 5a projects from the tip of the nose member 7 and begins to be screwed into the threaded material 20. Finally, the screw is fully screwed in at its stroke end. After that, by separating the nose member 7 from the material 20 to be screwed, the nose member 7
Slides again in the protruding direction with respect to the adapter body 6. At this time, in the connecting band supply mechanism a of the connecting screw 3, the one-way clutch 13 rotates in the opposite direction by a certain angle, but in this direction the feed wheel 14 does not engage, so the feed wheel 14 does not rotate, The connecting screw 3 is not sent.

Next, as shown in FIGS. 1 and 2, a magazine 21 for accommodating the connecting screw 3 having a semi-disc shaped portion is provided on the connecting screw 3 supply side of the adapter body 6. There is. The magazine 21 has a semi-disc-shaped portion arranged on the opposite side in the screwing direction, and as shown in FIG. 2, the magazine 21 has a wide, horseshoe-shaped portion that guides the connecting band 4 of the connecting screw 3 along the outer peripheral side of the magazine 21. And the narrow space 23 for accommodating the shaft portion of the screw 5 is formed in the inner diameter direction of the connecting band guide path 22.

An opening 24 facing the inlet 12a of the guide groove 12 of the nose member 7 is formed at one end of the connecting band guide path 22. Further, another opening 25 is formed at the other end of the coupling band guide path 22.

When the magazine 21 is used, one end of the connecting screw 3 is pushed through one of the openings 24 and 25. The connecting screw 3 is inserted into the magazine 21 along the connecting band guide path 22, and the shaft portion of each screw 5 is housed in the space 23.

Then, one end 3a of the connecting screw 3 is taken out from the opening 24 on the one end side of the connecting band guide path 22 and introduced into the guide groove 12 of the nose member 7, and the other free end 3b side is the other end of the magazine 21. It is made to stick out from the opening 25 of.

When the screw tightening operation of the above-mentioned structure is continuously performed in the above-described manner, the connecting screw 3 is accommodated in the magazine 21, and the opening 24 of the connecting screw 3 is formed in the nose member 7 and the connecting screw inlet 12a is formed. Since the opening is formed so as to oppose to and in the screw driving direction, the connecting screw is not twisted between the opening 24 and the connecting screw introducing port 23a. Since the screw shaft portion is not caught in the introduction port 12a, the connecting screw 3 can be fed smoothly.

Further, since the connecting band guide path 22 is formed in an arc shape along the outer peripheral side of the semi-disc-shaped portion inside the magazine 21, most of the connecting screw 3 is housed in the magazine 21. Further, since the connecting band 4 is accommodated in the wide connecting band guide path 22 and the shaft portion of the screw is accommodated in the narrow space 23, the shaft portion of the screw 5 does not move left and right when the connecting screw 3 is fed. Therefore, even if the connection belt having a weak stiffness is used, the connection screw 3 can be smoothly and surely supplied without being greatly shaken during the screw tightening work and disturbing the work.

Similarly, at the beginning of the screw tightening work, the free end portion 3b side of the connecting screw 3 protrudes out of the magazine 21, so that when the screw is laterally screwed in, it is subjected to the action of gravity in the twisting direction.
However, since the length of the protruding portion of the connecting screw 3 is short, twisting is unlikely to occur due to the rigidity of the connecting band 4. Therefore,
Even when the continuous screw tightening work is performed in the lateral direction, when the protruding free end 3b side of the connecting screw 3 sequentially enters the magazine 21, the shaft portion of the screw 5 or the like opens in the opening 25 of the magazine 21.
Does not get caught on the opening edge of the. Further, most of the connecting screw 3 is housed in the magazine 21, and only the free end 3b side of the connecting screw 3 swings at the time of work, which does not hinder the work, so that the operator can grasp it with one hand. You don't have to. Therefore, workability is improved.

[Brief description of drawings]

FIG. 1 is a side view showing a partial cross-section of a main part of a screw tightener according to the present invention, FIG. 2 is a cross-sectional view taken along line XX of FIG. 1, and FIGS. 3 (a) (b) ( FIG. 3C is an explanatory view of the operation of the coupling band supply mechanism. Reference symbol a ... Connection belt supply mechanism, 1 ... Driver body, 2 ...
… Adapter, 3… Connection screw, 4… Connection band, 6… Adapter body, 7… Nose member, 8… Driver bit, 21… Magazine, 22… Guide path, 23… Space, 2
4, 25 ... Opening

Claims (1)

[Scope of utility model registration request] 1. A screw tightening machine for continuously screwing a connecting screw having a shaft portion of the screw inserted and held at a constant interval in a long synthetic resin connecting belt, the driver bit rotatingly driving a driver bit. An adapter body attached to the body, a nose member supported by the adapter body so as to be relatively movable in the axial direction of the driver bit, and a connecting screw provided on the nose member and supplied to the nose member. A magazine having a semi-disc shaped portion on the side opposite to the screw driving direction is attached to the adapter body, and inside the magazine, at least most of the coupling band is provided along the outer peripheral side thereof. Forming a wide connecting strip guide path in the shape of a horseshoe, and forming a narrow space for accommodating the shaft portion of the screw on the screw connecting strip in the inner diameter direction of the connecting strip guide path. At the same time, both ends of the connecting band guide path are opened to the outside, and the opening at one end faces the introducing port of the connecting screw formed in the nose member, and the opening is formed in the screw driving direction. A characteristic screw tightener.