JPH085027Y2 - Connecting band guide device for screw tightener for connecting screws - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is to attach a magazine containing a connecting screw to a screw tightener using a connecting screw in which screws are held at regular intervals on a long connecting strip. The present invention relates to a connection band guide device that smoothly guides the connection band of connection screws by the magazine.

(Prior art and its problems) Generally, a connecting screw in which a shaft portion of a screw is inserted and supported at a constant interval in a long connecting band which is formed of a band-shaped sheet or is formed by folding a wide sheet into a band shape. In a screw tightening machine that uses, the connecting screw is not very long, so when using it, attach one end of the connecting screw to the connecting band supply mechanism provided on the nose member of the screw tightening machine, and let the other parts hang freely. It has become.

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.

Therefore, the applicant of the present application has proposed a structure in which a magazine having a semi-disc-shaped portion is attached to the screw fastening machine (Actual Kaihei 4-2326).
No. 5). Inside the magazine, a connecting screw guide portion for guiding the connecting screw is formed along the peripheral side thereof, and the connecting screw guide path has a connecting belt guide portion having a wide outer side and a screw shaft guide portion having a narrow inner side. It consists of and.

According to this structure, the connecting screw is housed and held in the magazine through the opening of the magazine, so that the connecting screw is smoothly fed without twisting.

However, using a connecting screw in which the notches 18 are formed at regular intervals in the side edge of the connecting band in the direction orthogonal to the longitudinal direction of the connecting band, the connecting screw is shown in FIG. 6 (a) and FIG. As shown in FIG. 6 (b) as seen from the supply opening end face side, when working with the screw tightener horizontal, when the part of the connecting screw protruding from the magazine is introduced into the magazine, the protruding part Is twisted, the screw shaft portion 28 is guided by the inclined guide surface 27 and smoothly guided to the screw shaft guide portion 22b when the connecting screw enters the connecting belt guide portion 22a, and the connecting belt 4 is connected. Although it will be guided to 22a, since the connecting band 4 is in a twisted state, the notch 18 for screw feeding of the side edge 29 thereof is connected to the connecting band guide portion 22a.
And the screw shaft guide portion 23b are engaged with and guided by the ridge 33, which rides on the inclined guide surface 27 that guides the screw shaft guide portion 22b as it is, and is guided along the inclined guide surface 27 to narrow the width. There is a phenomenon that the screw shaft guide portion 22b of the above-mentioned item enters. When the connecting band 4 enters the screw shaft guide portion 22b, there is a drawback that resistance due to friction works to hinder the feeding of the connecting screw.

(Object of the Invention) The present invention solves the above-mentioned drawbacks, and in particular provides a connection band guide device for a screw tightener for a connection screw, in which the connection band of the connection screw can be smoothly guided to the connection band guide portion. To aim.

(Means for Achieving the Purpose) In order to achieve the above-mentioned object, a connecting band guide device of a screw tightening machine for connecting screws according to the present invention includes a shaft part of a screw on a long connecting band made of synthetic resin at regular intervals. Is a screw tightening machine that continuously holds and tightens the connecting screws having notches formed at regular intervals in a direction orthogonal to the longitudinal direction of the connecting band on the side edge of the connecting band. An adapter main body attached to a driver main body for rotationally driving the driver bit, a nose member supported by the adapter main body so as to be relatively movable in the axial direction of the driver bit, and the connection provided on the nose member The adapter main body is provided with a magazine having a semi-disc-shaped portion on the side opposite to the screw driving direction, and the periphery of the magazine is provided inside the magazine. A connecting screw guide path for guiding the connecting screw along the side is formed in an arc shape, and the connecting screw guide path is composed of a wide connecting band guide portion on the outside and a narrow screw shaft guide portion on the inside, The end surface of the screw shaft guide portion is formed as an inclined guide surface that guides and guides the screw shaft portion of the supplied connecting screw, and the inclined guide is formed on the shoulder portion that connects the connecting band guide portion and the screw shaft guide portion. A step portion for accommodating the side edge of the connecting band when riding on the inclined guide surface is formed on the downstream side in the moving direction of the connecting screw from the surface, and the step portion has a downstream end in the moving direction of the connecting screw. Is characterized in that a guide wall surface is formed which engages with the side edge of the connecting strip riding on the inclined guide surface and guides the side edge to the connecting strip guide portion as the connecting strip advances to the downstream side. To do.

(Operation and effect of the invention) When the screw tightening operation is continuously performed by the screw tightener having the above-described structure, the connecting screw is first housed in the magazine. At this time, the coupling band is accommodated in the coupling band guide portion and the screw shaft portion is accommodated in the screw shaft guide portion. When the screw tightening work is performed in this state, the connecting screw is guided along the connecting screw guide path, so that twisting does not occur in the magazine,
Even if a connecting band having a weak waist is used, the connecting screw can be smoothly and surely supplied without being greatly disturbed during the screw tightening work and disturbing the work.

Also, since the free end side of the connecting screw initially protrudes outside the magazine, the protruding part twists when tightening the screw horizontally with the magazine, so the connecting band is fed when the connecting screw is fed into the magazine. The side edges of the strip may ride on the inclined guide surface, but at this time, the side edges of the connecting band are accommodated in the step portion, and when the connecting screw further advances in the supply direction along the step portion, the side edge becomes It engages with the guide wall surface and is guided to the coupling band guide portion. In this way, the side edge that slides along the inclined guide surface can escape to the stepped portion and is guided and guided by the guide wall surface to the connecting strip guide portion, so that the connecting strip enters the screw shaft guide portion and is connected. It is possible to prevent inconvenience of screw feeding failure and always supply the connecting screw smoothly and reliably.

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.
Notches 18 are formed through the side edges of the connection belt 4 at regular intervals in a direction orthogonal to the longitudinal direction of the connecting strip 4. In addition, connection belt 4
Include a long strip-shaped sheet and a thin wide sheet that is folded into a rectangular shape to increase rigidity and is formed into a strip shape as a whole.

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 formed so as to be detachable 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 constantly biased by a spring in the protruding direction.

Next, in the nose member 7, the guide groove 12 of the connecting screw 3 formed in the direction orthogonal to the sliding direction of the driver bit 8 is formed.
A connecting and supplying mechanism a is provided for sending the screws 5 on the connecting screws 3 one by one in synchronization with the screw tightening operation on the extension of the axis of the driver bit 8 in the nose member 7. The connection belt supply mechanism a uses the relative movement of the nose member 7 and the adapter body 6 to advance the connection screw 3 introduced from the introduction port 12a of the guide groove 12, and the one-way clutch 13 And a feed foil 14 polymerized on this. And FIG. 1 and FIG. 5 (a)
As shown in (b), when the nose member 7 moves backward with respect to the adapter body 6, the sliding shaft 15 of the one-way clutch 13 is guided by the sliding groove 16 of the adapter body 6 and moves. 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, the tip screw 5a projects from the tip of the nose member 7 and begins to be screwed into the threaded material 20, as shown in FIG. 5 (c). Finally,
At the end of its stroke the screw is fully screwed in. 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, the connection band supply mechanism a of the connection 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 and the connecting screw 3 is not fed.

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 supply side of the adapter body 6. . 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 connection screw guide path 22 for guiding the connection screw 3 is formed along the circumferential side of 21. The connecting screw guide path is composed of a wide connecting band guide portion 22a for accommodating and guiding the connecting band 4 and a narrow screw shaft guide portion 22b for accommodating and guiding the screw shaft portion 28. On the outside, the screw shaft guide portion 22b is arranged on the inside.

Both ends of the connecting screw guide path 22 are opened, and the connecting screw may be inserted and installed from either of the openings 24 and 25, but is supplied from the opening 25 to the opening 24 when used. The opening 24 is provided at the introduction port 12 of the guide groove 12 of the nose member 7.
It is formed to face a.

On the other hand, both end edges 26 of the opening 25 are formed to have the same width. The end surface 27 of the screw shaft guide portion 22b is formed as an inclined guide surface that guides and guides the screw shaft portion 28 of the connecting screw supplied from the opening 25.

Further, as shown in detail in FIGS. 3 and 4, a screw shaft portion 28 is guided to the screw shaft guide portion 22b at a shoulder portion connecting the connecting band guide portion 22a and the screw shaft guide portion 22b. From the inclined guide surface 27 to the downstream side in the moving direction of the connecting screw 3,
A step portion 30 for accommodating the side edge 29 of the connecting band 4 guided along the inclined guide surface 27 is formed by a cutout. Then, the end of the step portion 30 on the downstream side in the moving direction of the connecting screw 3 is engaged with the side edge 29 of the connecting band 4 and the side edge 29 is moved as the connecting band 3 progresses to the downstream side. A guide wall surface 31 that guides the guide band to the coupling band guide portion 22a is formed.

When continuously performing the screw tightening work with the screw tightener having the above-described structure, the connecting screw 3 is first housed in the magazine 21. At this time, the connecting belt 4 is connected to the connecting belt guide portion 22a,
The screw shaft portion 28 is housed in the screw shaft guide portion 22b. When the screw tightening operation is performed in this state, the connecting screw 3 is guided along the connecting screw guide path 22, so that no twist occurs in the magazine 21, and even if a connecting band with a weak waist is used,
It is possible to smoothly and reliably supply the connecting screw 3 without swinging greatly during the screw tightening work and not disturbing the work.

Further, since the free end side 3b of the connecting screw 3 initially protrudes from the outside of the magazine 21, the protruding portion 3b is twisted when the magazine 21 is horizontally screwed as shown in FIG. When entering the inside of 25, the notch 18 formed in the side edge 29 of the connecting strip 4 guided along the inclined guide surface 27 is connected to the connecting strip guide part as shown by the dashed line in FIGS. 3 and 4. The side edge 29 rides on the inclined guide surface 27 that guides to the screw shaft guide portion 22b while being guided by engaging with the ridge 33 at the boundary between the screw shaft guide portion 22b and the screw shaft guide portion 27b. The side edge 29 is accommodated in the step portion 30, and when the connecting screw 3 further advances to the downstream side along the step portion 30, the side edge 29 is
29 is engaged with the guide wall surface 31 and is guided to the coupling band guide portion 22a. The above-described guiding state of the side edge 29 can be shown in the order of (a), (b), and (c) of FIG. 3, and as shown by the one-dot chain line to the solid line of FIG. In this way, the side edge 29 that slides along the inclined guide surface 27 can escape to the step portion 30 and is guided and guided by the guide wall surface 31 to the connecting strip guide portion 22a. It is possible to prevent inconvenience that the connecting screw 3 is fed into the guide portion 22b and the feed failure of the connecting screw 3 is prevented, and the connecting screw 3 can always be supplied smoothly and reliably. Further, as described above, when the coupling band 4 is guided and guided to the coupling band guide portion 22a, the screw shaft portion 28 slides smoothly on the end edge 26,
Further, the screw shaft guide portion 22b is guided by the inclined guide surface 27.
To be housed.

[Brief description of drawings]

FIG. 1 is a side view showing a partial section of an essential part of a screw tightener according to the present invention, FIG. 2 is a perspective view of the essential part of FIG. 1, and FIG. 3 is a perspective view of the essential part of an opening of a magazine. 4 and 5 are enlarged front views of one opening of the connecting screw guide path showing the guide device for the connecting band, and FIGS. 5 (a), (b) and (c) are explanatory views of the operation of the connecting band supply mechanism. 6 (a) and 6 (b) are a perspective view and a front view showing a state in which a connecting screw is introduced into a connecting screw guide path of a conventional magazine. Reference symbol a ... Connection belt supply mechanism, 1 ... Driver body, 2 ...
… Adapter, 3… Connection screw, 4… Connection band, 5… Screw, 6… Adapter body, 7… Nose member, 8… Driver bit, 21… Magazine, 22… Connection screw guide path , 22a …… Connecting band guide part, 22b …… Screw shaft guide part,
24, 25 …… Opening, 26 …… End edge, 27 …… Inclined guide surface,
28 …… Screw shaft, 29 …… Side edge, 30 …… Step, 31 …… Induction wall

Claims (1)

[Scope of utility model registration request] 1. A long synthetic belt made of synthetic resin is inserted through and held by a shaft portion of a screw at regular intervals, and side edges of the coupling belt are provided at regular intervals in a direction orthogonal to the longitudinal direction of the coupling band. A screw tightening machine for continuously tightening a connecting screw having a notch formed therethrough, comprising: an adapter body attached to a driver body for rotationally driving a driver bit; and an axial direction of the driver bit on the adapter body. A nose member that is supported so as to be relatively movable; and a connection band supply mechanism that is provided on the nose member and that supplies the connection screw to the nose member. The adapter body is provided on the side opposite to the screw driving direction. A magazine having a semi-disc-shaped portion is attached to the inside of the magazine, and a connecting screw guide path for guiding the connecting screw is formed in an arc shape along the circumferential side of the magazine, and the connecting screw guide path is wide on the outside. The connecting band guide portion and the screw shaft guide portion having a narrow width inside are formed, and the end surface of the screw shaft guide portion is formed as an inclined guide surface for guiding and guiding the screw shaft portion of the supplied connecting screw. A shoulder for connecting the connecting band guide part and the screw shaft guide part, and a step part for accommodating the side edge of the connecting band when riding on the inclined guide surface, on the downstream side in the moving direction of the connecting screw from the inclined guide surface. And the end portion of the stepped portion on the downstream side in the moving direction of the connecting screw engages with the side edge of the connecting belt that rides on the inclined guide surface, and as the connecting belt advances to the downstream side. A connecting band guide device for a screw tightener for connecting screws, characterized in that a guide wall surface for guiding the side edge to the connecting band guide portion is formed.