JPH0636780U - Hand tool type screw tightener - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a screw tightening machine that smoothly discharges the connecting belt and has good operability. [Structure] A cylindrical grip, a driver bit that rotates axially at the tip of the grip and is capable of reciprocating in the axial direction of the grip, and a number of screws fixed in the tip of the grip and arranged in a row on a connecting band with elasticity. A screw connection body advancing guide for guiding the progress of the screw connection body that is supported in parallel, the screw connection body advancing guide having a screw receiving hole through which a screw is positioned and a driver bit comes in and out, and a screw connection body. Is connected to the screw receiving hole by one parallel pitch of the screw, and is fixed in parallel to the grip, and is formed by arranging the screw connecting body supply passage and the connecting belt discharging passage in parallel. And a band discharge path forming means.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a hand tool type in which a plurality of screws are supported in parallel in a row and an elastic connecting band is fed by one parallel pitch of the screws, while a screwdriver bit rotated by an electric motor screws the screws out of the connecting band and into the work piece. Regarding screw tighteners.

[0002]

[Prior art and its problems]

 Conventionally, in a hand-tool type screw tightener that uses an elastic connecting band (for example, made of synthetic resin) that supports multiple screws in parallel in a row, the screw of the connecting band comes off immediately after screwing into the workpiece. It was sequentially discharged from the part. However, if the screw tightening work is continued, the discharged connecting strip becomes long, clings to the screw tightener, and stays around the screw tightener. Therefore, every time the operator moves the screw tightener in his hand, the operator should shake the discharged connecting strip largely to remove the connecting strip from around the screw tightening machine and improve the screw tightening work environment. I won't. Further, when the connecting belt is shaken greatly, the connecting belt may damage the work or be caught on the edge of the work or the work table, which deteriorates the workability of the screw tightening work. On the other hand, if the screw tightening machine is provided with a connecting belt discharge path that is separate from the screw connecting body supply path, it becomes difficult for the operator to hold the screw tightening machine, which deteriorates the operability of the screw tightening machine.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to provide a hand tool type screw tightener in which a connecting band of a screw connecting body from which a screw is pushed out is smoothly discharged and which has good operability.

[0004]

[Means for Solving the Problems]

 The present invention has a cylindrical grip, a driver bit that rotates axially at the tip of the grip and can reciprocate in the axial direction of the grip, and a large number of screws that are fixed to the tip of the grip and are aligned in a connecting band with elasticity. And a screw coupling body advancing guide that guides the progress of the screw coupling body that is supported in parallel with the screw coupling body.The screw coupling body advancing guide is provided with a screw receiving hole through which a screw is positioned and a driver bit comes in and out. A threaded connection body formed by arranging a threaded connection body feed path and a threaded connection band discharge path in parallel, which is fixed in parallel to a grip, and a threaded connection band feeding means that feeds the threaded connection body toward the screw receiving hole by one parallel pitch. It comprises a supply / connection zone discharge path forming means.

[0005]

[Operation and effect of the device]

 The connection strip discharge path is formed integrally with the screw connection body supply path as a screw connection body supply / connection zone discharge path forming means, so the operator needs to swing around the connection strip discharged during the work. And the operability of the screw tightener is improved.

[0006]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a partially cutaway side view of a hand tool type screw tightener according to the present invention. FIG. 2 is a vertical cross-sectional side view of the main part of the screw tightening mechanism of the hand tool type screw tightener of FIG. 1.

As shown in FIG. 1, the hand tool type screw tightener has a screw coupling body advancing guide 1 having a substantially inverted T shape as a whole and a rear end of a vertical bar portion of the screw coupling body advancing guide 1 ( 1, a cylindrical grip 2 that is connected to the upper end) and forms an extension of the vertical bar portion of the screw connection body advancing guide 1, and a screw connection body supply that is arranged in parallel with the grip 2 at regular intervals. -Connecting band discharge path forming body 3 and screw connecting body supply / connecting band discharge path forming body from the connecting band discharge port 1a provided at one end (the right end in Fig. 1) of the lateral bar portion of the screw connecting body advancing guide 1. 3 and a curved discharge connecting path forming body 5 connected to the lower end portion 4a of the connecting zone discharge path 4.

Before explaining the hand tool type screw tightener of the present invention, an outline of the screw tightening mechanism will be described for better understanding of the present invention. The screw tightening mechanism mainly includes a sleeve assembly 6 that is inserted into and removed from a screw receiving hole 20 (see FIG. 3) formed in the center of the inverted T-shaped lateral bar portion of the screw connection body advancement guide 1, and the screw connection body advancement. The main air cylinder device 7 extending toward the vertical T-shaped vertical bar portion of the guide 1 and having the upper end inserted into the grip 2 and the main air cylinder device 7 so as to slide in the axial direction of the main air cylinder device 7. A stepped cylindrical air piston 8 which is installed inside, and a rotary connecting cylinder 9 which is arranged coaxially with the air piston 8 and moves integrally with the air piston 8 in the axial direction but is rotatable relative to the air piston 8. And a rod-shaped driver bit 10 fixed to the rotary connecting cylinder 9 so as to extend from the tip of the rotary connecting cylinder 9, and the tip of the inverted T-shaped horizontal bar of the screw coupling body advancing guide 1. Close to the side of assembly 6 The connecting band feed claw wheel 11 that engages with the rectangular cutout 17 formed in the connecting band and that is formed in the connecting band, and the connecting band feed claw wheel 11 that engages with the connecting band feed claw wheel 11 is arranged in one parallel pitch of the screws 12. The ratchet wheel pitch drive mechanism 13 for rotating each one by one, the coupling band feed air cylinder device 14 that is attached to the side of the main air cylinder device 7 and serves as a prime mover of the ratchet wheel pitch drive mechanism 13, and the hexagonal hexagon of the rotary connecting cylinder 9. It is composed of a rotating shaft 9a having a hexagonal cross section, which is slidably fitted in the inner surface and is rotated by an electric motor (not shown).

The outline of the operation of the screw tightening mechanism is as follows. In the initial state of the screw tightener, the air piston 8 is at the rearmost position (upper end position in FIG. 2), and the driver bit 10 and the sleeve assembly 6 are inserted from the screw receiving hole 20 of the screw coupling body advancing guide 1. It is in the retracted position (above the screw receiving hole 20 in FIG. 2). When the operator pulls a trigger (not shown) from this state, the air piston 8 advances while the rotating shaft 9a and the rotating connecting cylinder 9 rotate by the electric motor, and the sleeve assembly 6 and the driver bit 10 are connected. The screw 12 is advanced, the screw 12 is disengaged from the connecting band 16, and screwed into the work.

When the operator releases the trigger after the screwing of the screw 12 and the screw tightening work are completed, the rotation of the electric motor is stopped, so that the rotation shaft 9a and the rotation connecting cylinder 9 stop rotation. At the same time, the air piston 8 also returns to the initial position. At that time, the piston rod 14a of the connecting band feeding air cylinder device 14 advances, and the pressing rod 13a of the ratchet wheel pitch drive mechanism 13 engages with the driven claw 11a of the connecting band feeding claw wheel 11 to form one parallel pin. The connecting band feed ratchet wheel 11 is rotated counterclockwise in FIG. As a result, the feed claw 11b of the coupling band feeding claw wheel 11 feeds the screw coupling body 15 toward the screw receiving hole 20 of the screw coupling band progress guide 1 by one parallel pitch. The lead screw 12 is positioned in the screw receiving hole 20 and the screw tightener is initialized.

As shown in FIG. 2 and FIG. 3, the screw connecting body advancing guide 1 is arranged such that the screw connecting body advancing guide 1 extends from the screw connecting body supply passage 22 toward the screw receiving hole 20 at the rear end ( It has a guide groove 18 which opens at the left end in FIG. 3 and is connected to the screw receiving hole 20. The screw 12 moves in the guide groove 18 and is positioned in the screw receiving hole 20 of the screw coupling body advancing guide 1. In the screw coupling body advancing guide 1, a curved coupling band discharge passage 19 is formed from the screw receiving hole 20 to the front end (right end in FIG. 2) of the screw coupling body advancing guide 1 toward the connecting band discharge port 1a. Has been done. A rear end 5a of the discharge connecting path forming body 5 is attached to the front end of the screw coupling body advancing guide 1 by a pair of fittings 21 having an L-shaped cross section. The discharge connecting path forming body 5 is a flat strip (for example, made of soft synthetic resin) having elasticity of a rectangular frame (see FIG. 5) in cross section, and is curved as described above while being lower end of the connecting strip discharge passage 4. It is attached to the portion 4a.

As shown in FIG. 4, on the outer surface side (left side in FIG. 4) of the screw connection body supply / connection band discharge path forming body 3, the screw connection body supply path in which the screw connection body 15 moves. 22 are provided. A window 24 through which the screw portion 12a of the screw 12 projects is formed in the outer wall 23 of the screw connection body supply passage 22. The connection band discharge path 4 is provided on the inner side surface side (right side in FIG. 4) of the screw connection body supply / connection band discharge path formation body 3. As shown in FIG. 6, the discharge communication channel forming body 5 may have a rectangular frame cross section and may have a window 25. The support piece supporting the screw 12 in the connecting band 16 after the screw 12 is removed is deformed and its tip end becomes mountain-shaped, but since the window 25 exists as shown in FIG. 6, The discharge connecting path forming body 5 can be made thin and its elasticity can be sufficiently secured. Further, the operator can confirm the presence or absence of the connecting band 16 through the window 25.

As described above, since the connecting band 16 from which the screw 12 is removed is provided integrally with the screw connecting body supply path 22 as the screw connecting body supply / connection band discharge path forming body 3, the screw tightener is easy to grip and can be operated. Good nature. Since the elastic connecting passage forming body 5 continues from the outlet 1a of the connecting body advancing guide 1 to the lower end of the connecting body supplying / connecting belt discharging passage forming body 3, the connecting belt 16 can be formed even in a narrow space. It is possible to secure a discharge communication passage that enables smooth discharge.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a hand tool type screw tightener of the present invention.

FIG. 2 is a vertical sectional side view of a screw tightening mechanism of the hand tool type screw tightener of FIG.

FIG. 3 is a front view of the hand tool type screw tightener of FIG. 1.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

5 is a cross-sectional view taken along line BB in FIG. 1, showing an example without a window.

6 is a cross-sectional view taken along the line BB of FIG. 1, showing an example with a window.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Screw connection body advancing guide 2 Grip 3 Screw connection body supply / connection band discharge path forming body 4 Connection band discharge path 10 Driver bit 11 Connection band feed pawl wheel (coupling body feed means) 12 Screw 13 Pawl wheel pitch drive mechanism (coupling) Body feeding means) 14 Coupling belt feeding air cylinder device (coupling body feeding means) 15 Screw coupling body 16 Coupling belt 20 Screw receiving hole 22 Screw coupling body supply path

Claims (1)

[Scope of utility model registration request] 1. A cylindrical grip, a driver bit that rotates axially at the tip of the grip and can reciprocate in the axial direction of the grip, and a large number of screws fixed to the tip of the grip to form a connecting band having elasticity. A screw coupling body advancing guide for guiding the progress of a screw coupling body that is supported in parallel in a row, the screw coupling body advancing guide having a screw receiving hole through which a screw is positioned and a driver bit comes in and out, and a screw coupling body advancing guide. Connecting band feeding means for feeding the connecting body toward the screw receiving hole by one parallel pitch of the screw and a parallel fixing to the grip, and the screw connecting body supply path and the connecting band discharging path are formed in parallel and are formed.・ A hand tool type screw tightening machine consisting of connecting belt discharge path forming means.