JP3133152U - Screw holder for screwdriver - Google Patents

Abstract

A screw holder is attached to a cross driver shaft, and a screw gripping claw is released and a gripping body is retracted so that a mounting wall is not damaged immediately before screwing of the screw is completed.
A driver shaft in which a taper and a cross bit having a taper outer diameter larger than the shaft are formed at the circumferential groove and the tip of the shaft, and one end covering the outer periphery of the driver shaft are extended from the base to grip a screw. And the reaction force tip that protrudes alternately between the claws and contacts the taper, the protrusion that engages the groove at the other end, and the protrusion that alternately protrudes between the protrusion and the driver axial direction A flexible chuck, an inner surface covering the outer periphery of the flexible chuck, an inner surface with which the claw comes into contact, a pressing surface, a chuck pressing member, and a holder for forming a protrusion pressing portion are provided.
[Selection] Figure 2

Description

Technology field

The present invention relates to a screw holder for a cross driver.

Technology background

  In the prior art, various screw holders have been considered to prevent the screw from falling when a screw is attached / detached with a cross driver, one that magnetizes the tip of the bit and adsorbs the screw, and the tip of the bit is flexible. It is considered that the screw head is covered with a rubber tube and the tribar shaft gripping body is provided with a claw and slid to sandwich the screw head.

  These are suitable for certain conditions, but are often inconvenient for other conditions, and none satisfy various requirements.

  In the method of holding the screw by magnetizing the tip of the bit, the magnet is weakly attracted, and the metal screw that is not attracted cannot be held, causing a problem.

  Further, the method of covering the tip of the bit with a flexible rubber tube and inserting it into the head of the screw requires time for attaching the screw to the bit, and is not suitable for a large number of screw attaching / detaching operations continuously.

And when the gripping body method is temporarily unnecessary, the unevenness of the claws and metal fittings of the gripping body device hinders the work, and the nails rub the mounting wall immediately before the screw tightening is completed, and the interior materials of the building and various office work Fastening screws for finished products such as machines and home appliances are inconvenient and inconvenient, and have their respective drawbacks, which are not suitable for various kinds of work except for a single work and have not been widely used.
Actual open hei 05-005366 Japanese Utility Model Hei 05-03868

  Even if a screw is securely attached and gripped and a load is applied in the middle of screwing, the cross bit will lift and the screw groove claw will open and the gripper will be released just before the screw is screwed in without causing damage to the screw groove protrusion. If the mounting wall is not needed temporarily because it does not damage the mounting wall, it can be moved to the hand on the handle side of the driver-shaft and does not hinder the work. By trying to solve the problem.

Means to solve the problem

  A driver shaft in which a groove and a taper with a large outer diameter at the tip and a cross bit are formed on the circumference of the shaft, and one end that covers the outer periphery of the driver shaft extend from the base of the chuck body, and the tip extends outward. A plurality of claws for freely holding a screw are provided, a plurality of reaction force tips projecting alternately between the claws and abutting against the taper, and a plurality of projections with the other end engaging the groove, and A plurality of stoppers that are alternately provided between the protrusions and a flexible chuck that is movable in the driver-axis direction, and a distal end surface and an inner surface that cover the outer periphery of the flexible chuck and abut against the wall surface The inner surface to contact the claw, the pressing surface to contact the central part of the claw, the chuck press to contact the base of the claw, the protrusion pressing part to engage the protrusion with the groove, and the engagement of the protrusion. Providing a slide surface to prevent and a holder to form the rear end surface to contact the stopper There never.

Effect of device

  If the holder is not retracted, the clamping action of the screw will not be released, and even if a load is applied during screwing, the cross bit will not lift up and damage the protrusion of the screw groove. Since the claw is opened and the entire screw holder is retracted, the power drive driver does not need to interrupt the operation and open the chuck claw, which is extremely efficient.

  In addition, it is not necessary to interrupt the work just before it touches the wall surface by screwing in a narrow place and operate the chuck's claw to release it. Ideal for assembling and using finished products such as office machines and home appliances.

  The structure is simple and small, and there are no protrusions on the outer periphery of the screw holder, and when it is temporarily not used, it can be moved from the tip of the cross bit to the hand of the driver shaft.

  The driver shaft is composed of a hexagonal shaft (this device uses a hexagonal shaft as the driver shaft, the handle at the right rear end and the power drive unit are not shown), and the taper with a larger outer diameter than the driver shaft is formed on the left tip. The formed cross bit is provided. The base of the chuck body that covers the outer periphery of the driver shaft (the present invention uses a spring steel plate), the left end of which protrudes from the base on the outer periphery, and the three claws that hold the screw hold the center and the chuck And three reaction force tips that obtain a reaction force by pressing against the taper are alternately formed between the claws. And the three protrusions that project from the chuck body on the outer periphery of the right rear end of the chuck body, determine the position of the chuck, and fix the forward and backward movement, and the three that restrict the movement of the holder between the protrusions Stoppers are alternately provided so as to be movable in the driver shaft direction. A tip surface that contacts the wall surface of the holder that covers the outer periphery of the chuck body, an annular inner surface that suppresses the opening of the claw when not acting inside, and an annular pressing surface that abuts the center when the claw grips the screw An annular chuck pressing member that abuts on the base that restricts the forward movement of the holder, an annular protrusion pressing portion that positions the chuck to fix forward and backward movement and engages the protrusion with the groove, The holder is provided with an annular slide surface for preventing engagement and disengagement and a rear end surface for limiting retreat at the rear end. By moving the holder back and forth, the claw at the tip of the chuck is opened and closed to grip the screw, and if the tip contacts the wall surface, the screw is released and the screw holder is retracted by the reaction force of the reaction force tip. To do.

  An embodiment will be described below with reference to the accompanying drawings. FIG. 1 shows a cut surface excluding a cross bit 3 according to an embodiment of the present invention. A groove 3b and a left end of a hexagonal shaft 3c have a larger outer diameter than the hexagonal shaft 3c. The cross bit 3 having a pair 3a is provided. The left end of the chuck body 2 that covers the outer periphery of the hexagonal shaft 3c has a central portion 2b and a base portion 2c on three claws 2a, and three reaction force front ends 2f are alternately projected on the circumference. The right rear end protrudes from the chuck body 2 and is provided with three protrusions 2g and three stoppers 2e alternately on the circumference. A holder 1 that covers the outer periphery of the chuck body 2 has a front end surface 1a, an inner surface having an annular inner surface 1d, an annular pressing surface 1b, an annular chuck press 1c, an annular protrusion pressing portion 1e, an annular A slide receiver 1g and a rear end face 1f on one surface are provided.

  When the screw 4 is gripped in FIG. 2, when the holder 1 of the screw holder covering the outer periphery of the chuck body 2 is moved along the hexagonal axis 3c of the driver shaft toward the tip side of the cross bit 3, the protrusion pressing portion 1e The projection 2g is pushed to push the entire chuck body 2 toward the tip side of the cross bit 3. The reaction force tip 2f rides on the taper 3a. Since the projection 2g is biased inward, the biasing force is applied to the groove 3b. It engages and disengages from the protrusion pressing portion 1e, prevents the protrusion 2g from floating on the slide surface 1g, and suppresses the reaction force action of the reaction force tip 2f on the holder 1. In this state, the center portion 2b of the claw 2a is pressed and bent by the pressing surface 1b, and the screw 4 is gripped at this time, and when moving forward, the chuck presser 1c comes into contact with the base portion 2c and restricts the advancement of the holder 1. Holder 1 does not return Securely grip the screw 4 screwing on the wall 5 in 2a.

  Immediately before the screw 4 is screwed into the wall surface 5, the tip surface 1a of the holder 1 and the wall surface 5 come into contact with each other, and when the screwing progresses, the tip surface 1a moves backward relatively to move the pressing surface 1b away from the central portion 2b. The claw 2a releases the grip of the screw 4 and at the same time releases the engagement and disengagement of the protrusion 2g from the slide receiver 1g, the reaction force tip 2f slides the taper 3a by the reaction force, and the protrusion 2g released from the slide surface The screw holders of the holder 1 and the chuck body 2 are retracted from the wall surface 5 by lifting the protrusion pressing portion 1e that is lifted from the groove 3b, so that the wall surface 5 is not damaged by the claw 2a, and the temporary screw holder is unnecessary. At this time, it can be pulled toward the handle as it is.

  FIG. 3 is an exploded view of the chuck body 2 in the axial direction. The left side view A before development, the development view B, and the right side view C before deployment, the claw 2a, the reaction force tip 2f, the protrusion 2g, When the stopper 2e is represented and wound in the direction of the arrow, it becomes a hexagonal cylinder and is shown in the embodiment of the present invention.

  FIG. 4 is a view in which the chuck body 2 is cut and expanded in the axial direction. The left side view A before development, the development view B, and the right side view C before deployment, a claw 2a, a reaction force tip 2f, a protrusion 2g, The stopper 2e is represented and the developed view B is wound in the direction of the arrow to form a rectangular cylinder, which is not adopted in the present invention.

  FIG. 5 is an exploded view of the chuck body 2 in the axial direction. The left side view A before development, the development view B, and the right side view C before deployment, claw 2a, reaction force tip 2f, protrusion 2g, The stopper 2e is represented and the developed view B is wound in the direction of the arrow to form a circular cylinder, which is not adopted in the present invention.

  If the holder 1 is magnetized, it becomes easier to grip the screw head.

  The cross section of the driver shaft and the chuck body 2 can be made in various polygons and circles in addition to the above, but the embodiment of the present invention is a hexagonal shaft that can be optimally attached to a power drive driver.

  If the tip 1a of one holder is made of urethane rubber, even a soft building material will not be damaged.

  Since the screw holder for a driver according to the present invention can be mass-produced as an industrial product, it has industrial applicability.

The present invention is a cross-sectional view of the holder and chuck body excluding the cross bit. The present invention is a cross-sectional action diagram of the holder and chuck body excluding the cross bit. Development view of the chuck body used in the embodiment of the present invention Rectangle development of the chuck body that can be manufactured with the present invention Circular development of the chuck body that can be manufactured with the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 .... Holder 1a ... Tip surface 2 .... Chuck body 2a ... Claw 2e ... Stopper 2f ... Reaction force tip 2g ... Projection 3 .... Cross bit 3a ...・ ・ Taper 3b ・ ・ ・ Groove 4 ・ ・ ・ Screw 5 ・ ・ ・ ・ Wall

Claims (1)

  A driver shaft in which a groove and a taper with a large outer diameter at the tip and a cross bit are formed on the circumference of the shaft, and one end that covers the outer periphery of the driver shaft extend from the base of the chuck body, and the tip extends outward. A plurality of claws for freely holding a screw are provided, a plurality of reaction force tips projecting alternately between the claws and abutting against the taper, and a plurality of projections with the other end engaging the groove, and A plurality of stoppers that are alternately provided between the protrusions and a flexible chuck that is movable in the driver-axis direction, a front end surface that covers the outer periphery of the flexible chuck and abuts against the wall surface, and an inner surface The inner surface to contact the claw, the pressing surface to contact the central part of the claw, the chuck press to contact the base of the claw, the protrusion pressing part to engage the protrusion with the groove, and the engagement of the protrusion. Providing a slide surface to prevent and a holder to form the rear end surface to contact the stopper Driver to FEATURES - bis holder of.

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