JPH0636779U - Hand tool type screw tightener - Google Patents

Abstract

(57) [Summary] [Purpose] The connection belt of the screw connection body is discharged smoothly,
Also, a hand tool type screw tightening machine with good operability is provided. [Structure] A driver bit that axially rotates at the tip of a tubular grip, and a nose that can reciprocate in the axial direction of the grip at the tip of the grip and that guides a screw connection body laterally with respect to the axis of the nose. A nose with a screw receiving hole for positioning a screw and a driver bit coming in and out in the middle part of the arc-shaped screw connection body advancing guide, and a screw connection body which is arranged in the middle part of the connection body advancing guide and engages with the connecting band. A substantially circular connecting band feed wheel that feeds the screw along the screw connecting body advancing guide by one parallel pitch, and a connecting band after screw removal that is fixed in parallel with the grip and is discharged from the screw connecting body advancing guide. Connecting band discharge path forming means for continuing discharge, and connecting band receiving means connected to the connecting body discharge path forming means and extending toward the axis of the nose and arranged away from the connecting band discharge port of the screw connecting body moving guide It consists of a guide.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, an elasto-plastic coupling band (for example, made of synthetic resin) in which a large number of screws are supported in parallel in a row is fed by one parallel pitch of the screw, while the screw is coupled by a driver bit rotated by an electric motor. The present invention relates to a hand tool type screw tightener that screws into a work piece that is extruded from and tightens the screw.

[0002]

[Prior art and its problems]

 Conventionally, a hand-tool type screw tightener that uses a synthetic resin connecting band that supports a large number of screws in parallel in a row, immediately discharges the unscrewed part of the connecting band immediately after tightening the screw to the workpiece. Was there. 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, he shakes the discharged connecting band greatly to remove the connecting band from the periphery of 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 workbench, which deteriorates the workability of the screw tightening work.

[0003]

[Problems to be solved by the device]

 It is an object of the present invention to provide a hand tool type screw tightening machine that smoothly discharges a connection strip from which a screw has been removed and has good operability.

[0005]

[Means for Solving the Problems]

 The present invention has a tubular grip, a driver bit that rotates axially at the tip of the grip, a nose that can reciprocate in the axial direction of the grip at the tip of the grip, and a connecting band that has a large number of screws and is elastic. A screw receiving hole through which the screw is positioned and a driver bit comes in and out in the middle of a substantially circular arc-shaped screw connector advancing guide that guides the screw connector that is supported side by side in parallel to the nose axis. And a nose provided with a nose, which is arranged in the middle of the connecting body advancing guide and engages with the connecting band to feed the screw connecting body along the screw connecting body advancing guide by one parallel pitch of the screw. On the side of the vehicle, which is fixed in parallel to the grip, for forming the screw coupling body feeding path for feeding the screw coupling body to the screw receiving hole, and the side of the grip coupling shaft opposite to the screw coupling body feeding path forming means. Connecting strip discharge path forming means for continuing to discharge the screwed connecting strips, which are fixed in parallel to the screw connecting body advancing guide, and the screw coupling body advancing guide side opening of the connecting body discharge passage forming means. It consists of a connecting band receiving guide connected to the end and extending from this open end towards the axis of the nose and away from the connecting band outlet of the screw connecting body advancing guide.

[0006]

[Operation and effect of the device]

 The coupling belt feed wheel causes an arc-shaped plastic deformation of the coupling belt by engaging with the elasto-plastic coupling belt of the screw coupling body, and along the substantially arc-shaped screw coupling body advancing guide. The connecting band is moved toward the connecting band discharge port of the screw connecting body moving guide. The tip of the connecting strip that exits the connecting strip outlet and the portion in the vicinity thereof stand up in an arc shape and are smoothly guided by the receiving guide for the connecting strip.

As described above, according to the present invention, the plasticity generated in the elasto-plastic coupling band is used to guide the tip of the coupling band to the coupling band discharge channel forming means, so that the coupling band discharge channel forming body is formed. Can smoothly receive the discharged coupling body without being directly connected to the coupling band discharge port of the screw coupling body advancing guide even when the nose reciprocates in the axial direction. For this reason, the connecting band discharged from the screw coupling progress guide does not cling to the screw fastening machine, and the operability of the screw fastening machine is improved.

[0008]

【Example】

 A preferred embodiment of the present invention will be described below 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 sectional side view of a main part of the hand tool type screw tightener of FIG. 1. As shown in FIG. 1, the hand tool type screw tightener of the present invention is mainly provided with a screw coupling body advancing guide 1b which is substantially inverted T-shaped and has a substantially arcuate shape at its tip. The nose 1 and the cylindrical grip 2 that is connected to the rear end (upper end in FIG. 1) of the vertical bar portion of the nose 1 and forms an extension of the vertical bar portion of the nose 1, and the nose 1. A slide cylinder 1a attached to the grip 2 so as to be reciprocally movable in the axial direction, a screw connection body supply path forming body 3 fixed in parallel with the grip 2 at a constant interval, and a screw with respect to the shaft of the grip 2. It is fixed in parallel with the grip 2 on the side opposite to the connection body supply path forming body 3, and is a connection for continuously discharging the connection band 4 after the screw is removed from the connection band discharge port 1c of the screw connection body advancing guide 1b. It is connected to the band discharge path forming body 5 and the lower end of the connected band discharge path forming body 5. A coupling strip receiving guide 6 inclined toward the axis of the nose 1, a substantially circular coupling strip feeding claw wheel 9 which contacts the coupling strip 4 and thereby feeds the coupling strip 4, and a shaft at the tip of the grip 2. And a rotating driver bit 12. The connection belt discharge path forming body 5 is fixed in parallel to the grip 2 on the side opposite to the screw connection body supply path forming body 3 with respect to the shaft of the grip 2. The connecting band receiving guide 6 has a U-shaped cross section and is provided with only the front wall 6a, and the rear surface side (right side in FIG. 1) is open. The connecting belt receiving guide 6 is arranged apart from the connecting belt discharge outlet 1c, and is located at a position apart from the connecting belt discharge outlet 1c even when the nose 1 retracts toward the grip 2.

In order to better understand the hand tool type screw tightener of the present invention, an outline of the screw tightener will be described with reference to FIG. The screw tightening mechanism mainly comprises a slide cylinder 1a which is fitted onto the nose 1 and is slidable in the axial direction with respect to the nose 1, and a substantially arcuate screw thread which forms the inverted T-shaped lateral bar portion of the nose 1. A screw holding chuck 8 which is arranged at the front position of the screw receiving hole 7 formed in the center of the coupling band advancing guide 1b and pivotally supported by the nose 1 so as to be openable and closable, and close to the rear opening end of the screw receiving hole 7. And a pair of substantially circular connecting band feed claw wheels 9 that are pivotally supported by the nose 1 and engage with the rectangular feeding notches formed on the connecting band 4, and a pair of connecting claws pivotally supported by the slide cylinder 1a. A pair of claw wheel pitch drive levers 11 that engage with the coupling band feeding claw wheel 9 to rotate the pair of coupling band feeding claw wheels 9 by one parallel pitch of the screw 10, and prevent the reverse rotation of the coupling band feeding claw wheel 9 The non-return claw 15 and the slide cylinder 1a rotate at the same axial position And a driver bit 12 driven to move in and out of the screw receiving hole 7 and the chuck 8 between the pair of coupling band feed claw wheels 9 and an electric motor for rotating the driver bit 12 (not shown). )) And.

The outline of the operation of the screw tightening mechanism is as follows. In the initial state of the screw tightener, the nose 1 is at the most advanced position with respect to the slide cylinder 1a (hence, the driver bit 12). At this time, the screw 10 does not exist in the screw receiving hole 7. When the operator presses a trigger switch (not shown) in this state, the nose 1 is retracted, and the ratchet wheel pitch drive lever 11 causes the connecting band feed ratchet wheel 9 to move to the screw 1 position as the nose 1 retracts with respect to the slide cylinder 1a. Rotate in parallel pitch and advance the connecting band 4 by one parallel pitch in the same direction. As a result, the screw 10 is fed into the screw receiving hole 7 and positioned at that position. Then, as the nose 1 is further retracted, the driver bit 12 rotates and fits into the drive groove 14 of the head of the screw 10, and in this state, the screw 10 is pushed out from the connecting band 4, and finally. The screw 10 is screwed onto the work.

When the operator releases the trigger switch after the screw tightening operation of the screw 13 is completed, the nose 1 moves forward with respect to the slide cylinder 1 a, and the driver bit 12 moves backward through the screw receiving hole 7. In the backward stroke of the nose 1, the ratchet wheel pitch drive lever 11 avoids the connecting band feeding ratchet wheel 9. The reverse rotation of the connecting band feed claw wheel 9 is prevented by the check claw 15, and the connecting band 4 is prevented from moving backward.

By the action of the above-mentioned screw tightening mechanism, plastic deformation occurs in the connecting band 4 following the circular arc of the connecting band feed claw wheel 9, and also when the driver bit 12 rushes into the connecting band 4, the connecting band 4 is connected to the connecting band 4. Plastic deformation of the arc occurs. Therefore, the tip of the discharged arc-shaped connecting band 4 and the vicinity thereof stand up with the rigidity not to buckle from the connecting band discharge port 1c of the screw connecting body advancing guide 1b, and the tip of the connecting band 4 is It hits the front wall 6a of the receiving guide 6. Then, by sequentially tightening the plurality of screws 10, as the nose 1 reciprocates in the axial direction, the tip of the connecting band 4 moves along the front wall 6a of the connecting band receiving guide 6 and is connected. It enters the inside of the band discharge path forming body 5.

Since the connecting band receiving guide 6 does not have a rear wall, the visibility of the driver bit and the screw during screw tightening is not impaired.

[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.

[Explanation of symbols]

 1 Nose 1b Screw connection body advancing guide 1c Connection band discharge port 2 Grip 3 Screw connection body supply path formation body 4 Connection band 5 Connection band discharge path formation body 6 Connection band reception guide 7 Screw reception hole 9 Connection band feed claw wheel 10 Screw 11 Claw wheel pitch drive lever 12 Driver bit

Claims (1)

[Scope of utility model registration request] 1. A tubular grip, a driver bit that rotates axially at the tip of the grip, a nose that can reciprocate in the axial direction of the grip at the tip of the grip, and a large number of screws are elastically coupled. A screw receiving body in which a screw bit is positioned in the middle of a substantially circular arc-shaped screw connecting body advancing guide that guides a screw connecting body that is supported side by side in parallel to the belt in the lateral direction with respect to the axis of the nose. A nose provided with a hole and a substantially circular connecting band which is disposed in the middle of the connecting body advancing guide and engages with the connecting band to feed the screw connecting body along the screw connecting body advancing guide by one parallel pitch of the screw. The feed wheel and the grip are parallelly fixed to each other, and the screw coupling body supply path forming means for feeding the screw coupling body to the screw receiving hole is provided. Connection strip discharge path forming means for continuously discharging the connection strip after screw removal, which is fixed in parallel with the screw connection body advancing guide, and the screw coupling body advancing guide side opening end of the connection body discharge passage forming means. And a connecting band receiving guide which is connected from the opening end and extends toward the axis of the nose and which is arranged away from the connecting band discharge port of the screw connecting body advancing guide.