JPH0724208Y2 - Screw tightener that uses connecting screws - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is directed to a long connecting band composed of a band-shaped sheet,
Alternatively, the present invention relates to a screw tightening machine that uses a connecting screw in which a shaft portion of the screw is inserted and supported at regular intervals in a long connecting band formed by folding a wide sheet into a band shape.

(Prior Art) Since the connecting screw used in this type of screw tightening machine is not so long, one end of the connecting screw is simply attached to the connecting band supply mechanism provided in the nose member of the screw tightening machine to connect the screw. Most of the other screws are free to hang.

However, the connecting screw is relatively easily bent due to the weight of the screw. Further, since the side edge of the connecting screw is formed with a notch for engaging with the feed claw that constitutes the connecting band feeding mechanism, if the connecting screw is twisted in the middle during screw tightening work, 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 screw freely shakes each time the screw tightening machine is moved, it becomes a hindrance during the work and is apt 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 screw 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 connecting screw does not move freely when the screw tightener tilts in any direction. It is an object of the present invention to provide a screw tightening machine that prevents smooth supply of the connecting screw and prevents the connecting screw from interfering with the screw tightening work by restricting as described above.

(Means for achieving the object) In order to achieve the above object, a screw tightener using a connecting screw according to the present invention inserts and holds a shaft portion of a screw into a long synthetic resin connecting band at regular intervals. A screw tightening machine for continuously tightening the connecting screws, which is an adapter main body attached to a driver main body for rotationally driving a driver bit,
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 band supply mechanism provided on the nose member and supplying the connecting screw to the nose member. A magazine having a semi-disc shaped portion is attached to the adapter body on the side opposite to the screw driving direction, and a wide connecting band guide for guiding the connecting band in an arc shape along the outer peripheral side is provided inside the magazine. Forming a passage, and forming a narrow space in the inner diameter direction of the connecting strip guide passage for accommodating the shaft portion of the screw on the connecting screw, and forming the nose member at one end of the connecting strip guide passage. Forming an opening facing the introduction port of the connected screw, and in the vicinity of the opening and in the narrow space,
It is characterized in that an engaging member that engages with the shaft portion of the connecting screw is formed.

The engaging member may be configured so that the set position can be adjusted along the axial direction of the screw.

(Operation and Effect of the Invention) According to the above configuration, the connecting screw is housed in the magazine through the opening of the magazine. The connecting screw is housed in the magazine, and the distance between the opening of the connecting screw and the connecting screw inlet of the nose member is short.Therefore, the connecting screw is not twisted during this time. Since the inlet of the connecting screw is not caught, the connecting screw can be fed smoothly.

Further, since the connecting band guide path is formed in an arc shape along the outer peripheral side of the semi-disk shaped portion inside the magazine, all or most of the connecting screws are housed in the magazine. Therefore, even if a weak connecting screw is used, it will not shake greatly during screwing work and will not disturb the work. Workability is improved because it is not necessary to hold it.

Moreover, since the shaft portion of the screw supported by the connecting band inserted in the magazine engages with the engaging member in the vicinity of the outlet opening to give resistance to the slipping out, the magazine weight depends on the weight of the connecting band. It is prevented from slipping out of the room, and smooth supply is performed.

By configuring the engaging member so that the setting position can be adjusted along the axial direction of the screw, the optimum engaging position can be set according to the axial length of the connecting nail loaded in the magazine. .

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 at a constant interval in a long synthetic resin connecting band 4, and the connecting band 4 is formed of a long band-shaped sheet or has a thin wall. There is a wide sheet that is folded to increase its rigidity and is formed into a strip.

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 attached to the tip of the motor so as to project therefrom.

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 a driver bit 8 with respect to the adapter body 6.
Is supported so as to be relatively movable along the axis of, 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 driver bit 8 housed in the adapter body 6 at the stroke end thereof.
The adapter body 6 is positioned at an optimum position by the stopper rod 10 and the adjustment ring 11 of the driver bit mounting portion 9 so that the tip of the adapter slightly projects from the tip of the nose member 7.

Next, as shown in FIG. 3 (a), the nose member 7 has a guide groove 12 for the connecting screw 3 formed in a direction orthogonal to the sliding direction along the axial center of the driver bit 8 and a screw tightening operation. There is provided a connecting screw supply mechanism a for sending the screws 5 on the connecting screw 3 one by one in synchronization with the above to extend the axial center of the driver bit 8 in the nose member 7. This connecting screw supply mechanism a
Utilizes the relative movement of the nose member 7 and the adapter body 6 to advance the connecting screw 3 introduced from the introduction port 12a of the guide groove 12, and the one-way clutch (not shown) and the feed. It consists of foil 14 and. When the nose member 7 moves backward with respect to the adapter body 6, the sliding shaft 15 of the one-way clutch is guided by the sliding groove 16 of the adapter body 6 as shown in FIG. It rotates by a certain angle as it moves. At this time, the one-way clutch engages the feed wheel 14 to rotate it, and at the time of rotation, the one-wheel clutch rotates.
Of the connecting screw 3 by engaging the notch 17 of the connecting screw 3 with the notch 18 of the connecting screw 3.
Is advanced by one screw. 19 is a check claw.

It is known that the connecting screw 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 screwed into the material 20 to be screwed.
When the nose member 7 is moved in the retracting direction by pressing it against the surface of the connecting screw 3, the connecting screw supply mechanism a is activated during the retreating, 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 P 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, it is completely screwed into the screw at its stroke end as shown in FIG.
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 connection screw supply mechanism a of the connection screw 3, the one-way clutch 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 and the connection is made. Screw 3
Will not be 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 part arranged on the opposite side to the screwing direction. Inside the magazine 21, as shown in FIG.
A wide semicircular connecting strip guide path 22 for guiding the connecting strip 4 of the connecting screw 3 is formed along the outer peripheral side of the connecting screw 3, and the shaft portion of the screw 5 is provided in the inner diameter direction of the connecting strip guide path 22. A narrow space portion 23 for accommodating is formed.

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.

And, the narrow space portion in the vicinity of the opening 24.
Engaging members 26 that engage with the shaft portion of the connecting screw 3 are provided on the opposing walls 28 and 29 that form 23. This engaging member 26
Is preferably slidably housed in the long slots 27 formed in the opposed walls 28 and 29 so that the set position can be freely adjusted along the axial direction of the connecting screw 3.

When using the magazine 21 having the above-described structure, one end of the connecting screw 3 is pushed in from 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 portion 23.

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

When the screw tightening operation of the above-described structure is continuously performed in the above-described manner, the connecting screw 3 is housed in the magazine 21, and the distance between the opening 24 of the connecting screw 3 and the guide groove 12 of the nose member 7 is reduced. Since the connecting screw 3 is short, the connecting screw 3 is not twisted during this period, and therefore the notch of the connecting screw 3 and the screw shaft portion are not caught in the introduction port 12a, so that the connecting screw 3 is 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. Therefore, even if the connecting screw having a weak stiffness is used, the connecting 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 of the connecting screw 3
Since the 3b side protrudes out of the magazine 21, it is subjected to the action of gravity in the twisting direction when the screw is screwed sideways. However, since the protruding length of the connecting screw 3 is short, the rigidity of the connecting screw 3 makes it difficult for the connecting screw 3 to be twisted. 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.

Further, during screw tightening work, when the connecting screw is consumed and the portion remaining in the magazine is reduced, when screwing downward with the screw tightening machine, as shown by the one-dot chain line in FIG.
The connecting screw in the magazine may slip off under its own weight and come out of the magazine. However, since the shaft portion of the connecting screw engages with the engaging member 26 in the vicinity of the opening 24 and gives a resistance to the withdrawal, free movement is restricted, so that the connecting screw is prevented from slipping down, and the connecting screw is prevented. Does not hinder the smooth supply of the product and the connecting screw does not interfere with the screw tightening work.

The engagement member 26 can be slidably adjusted in the long hole 27 to set the optimum engagement position according to the axial length of the connecting nail loaded in the magazine.

Further, according to the connecting screw supply mechanism a having the above-described structure, when the connecting screw 3 is supplied to the nose member 7, the nose member 7 and the opening 24 of the magazine 21 move in a direction in which the distance becomes smaller. The connecting screw 3 is not pulled out from the magazine 21, and when the screw tightening is completed and the nose member 7 and the magazine 21 move in the direction to separate from each other, the connecting screw 3 is pulled out from the magazine 21. The above resistance does not burden the

[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. ) (C) is an operation explanatory view of the connection screw supply mechanism. Reference numeral a ... Connection screw supply mechanism, 1 ... Driver body, 2
...... Adapter, 3 ...... Connecting screw, 4 ...... Connecting band, 6 ......
Adapter body, 7 ... nose member, 8 ... driver bit, 21 ... magazine, 22 ... guide path, 23 ... space part,
24, 25 ... Opening

Claims (2)

[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, the coupling belt is arcuate along the outer peripheral side. And a narrow space for accommodating the shaft portion of the screw on the connecting screw is formed in the inner diameter direction of the connecting band guide path. An opening is formed at one end of the id passage, the opening facing the inlet of the connecting screw formed in the nose member, and the shaft portion of the connecting screw is provided in the narrow space near the opening. A screw tightener using a connecting screw, characterized in that an engaging member for engaging is formed. 2. The screw tightener using a connecting screw according to claim 1, wherein the engaging member is configured so that a set position can be adjusted along the axial direction of the screw.