JP2019077032A - Jig for screw driving - Google Patents

Abstract

To provide a jig for screw driving capable of continuously driving a screw with a constant driving depth.SOLUTION: A jig for screw driving includes: at least, a driver bit 4; a position regulation member 5 which adjusts a projection length of a tip of the driver bit 4 from a jig 1 for screw driving; a bis holding member 6 which holds a head of a bis 3 and blocks forward movement of the position regulation member 5; an abutting stop member 7 which abuts onto a surface of a screwed member 2; a press spring 8 which restores the tip of the driver bit 4 to a predetermined position after screw driving; a guide plate 9 which presses the press spring 8 and receives the position regulation member 5; and an outer cylinder 10 which stores the bis holding member 6, the press spring 8 and the guide plate 9 in its internal space.SELECTED DRAWING: Figure 1

Description

  The present invention securely holds a fixing tool such as a wall surface, a ceiling surface, a floor surface, etc. when screwing a fixing tool such as a screw using an electric screwdriver etc. The present invention relates to a novel screw driving jig capable of keeping the driving depth of the screw constant at the time of driving.

  Conventionally, when a fixture such as a screw is screwed to a wall surface, a ceiling surface, a floor surface or the like using a tool such as an electric screwdriver, the fixture is a driver bit if the worker does not support the fixture by hand. There is a problem in that the work efficiency is reduced because it falls off from the tip.

In order to solve such a problem, the tip of the driver bit is magnetized, and the driver can be screwed while the fixing tool is magnetically attached to the tip of the driver bit, or the tip of the driver bit Various jigs for holding screws, etc., which are detachably mounted on parts are proposed. Also, fixing tools such as screws are screwed to wall surfaces, ceiling surfaces, floor surfaces, etc. using a tool such as an electric screwdriver. In this case, even if the switch of the electric driver is turned off, it is difficult to immediately stop the rotation of the driver bit, and the head of the screw is driven deeper than the surface of the threaded member, and the wall surface, ceiling surface and floor surface etc. There is a problem that the appearance is lost.

  That is, in order to screw the screw flush with the wall surface, ceiling surface, floor surface, etc. when using the electric screwdriver, the skill of the operator is required, and the head of the screw is a wall surface, ceiling surface And it was not easy for anyone to screw in flush with the floor surface etc.

  In view of such circumstances, various adjustment tools have conventionally been proposed which adjust the screwing amount so that the screw can be screwed flush with the floor surface etc. without requiring skilled skills.

  For example, the screwing amount adjusting tool described in Patent Document 1 is an adjusting tool that can be fitted on and fitted to a driver bit, and a screw mounted on the tip of the driver bit is screwed to a surface position with respect to the surface. The present invention is characterized in that it comprises an abutment portion as a first setting means for setting the projection amount e of the tip portion of the driver bit from the tip surface of the adjuster main body so as to match. In this screwing amount adjusting tool, when a screw is screwed on the surface of a screwed member such as a floor or a wall in a state where the screw is attached to the tip portion (bit portion) of the driver bit, The end face abuts on the surface, and further screwing is prevented. At this time, the top surface of the head of the screw is disposed on the same plane with respect to the surface, and it is believed that the screw can be prevented from being immersed or lifted up from the surface.

Patent No. 3391709

  However, in the screwing amount adjusting tool of Patent Document 1, since the diameter of the bulging portion at the end of the adjusting tool main body is larger than the diameter of the base facing the driver chuck of the electric driver, the bulging bulged in the left and right direction There is a problem that it is difficult to visually confirm the screwing position and the correct screw position depending on the part.

  Further, in the screwing amount adjusting tool of Patent Document 1, the driver bit protrudes from the outer cylinder by a predetermined protruding amount, but this protruding amount is determined at the design stage of the screwing amount adjusting tool. Therefore, it has been impossible for the operator to arbitrarily change the amount of projection of the tip portion (bit portion) of the driver bit according to the application. Therefore, when screws having different lengths need to be screwed onto the material to be screwed, it is necessary to prepare in advance a screwing amount adjusting tool according to the length of the screw, and a highly versatile screwing amount Adjustment tools were required.

  Furthermore, in the screwing amount adjusting tool of Patent Document 1, when the screw is inserted so that the head of the screw is flush with the surface of the screwed member, the surface around the screw hole of the screwed member In the case of partial peeling, there is a problem that it is difficult because the blade of a planer comes in contact with the head of the screw, even if it is desired to finish the process such as planing with a planer.

  Thus, in the case where it is desired to drive a screw into a wall surface, a ceiling surface, a floor surface or the like in a good appearance, a screw driving jig capable of arbitrarily adjusting the driving depth of the screw has been required.

  The present invention has been made in view of the circumstances as described above, and can securely hold a fixing tool such as a screw at the end of a tool such as an electric driver, and moreover the amount of projection of the driver bit from the screw driving jig To provide a jig for screw driving in which the tip portion of the driver bit is restored to a predetermined position after driving and the screw can be driven in continuously and at a constant driving depth. With the goal.

  In order to solve the above-mentioned subject, the present invention provides a jig for screw driving as follows.

(1) A screw driving jig capable of maintaining a constant driving depth of the screw from the surface of the screwed member at the time of screwing into the screwed member,
At least a driver bit, a position adjusting member for adjusting a projection length of a tip portion of the driver bit from the screw driving jig, a head of the screw and holding the forward movement of the position adjusting member. A screw holding member, a stop member for bringing the screw bit into contact with the surface of the threaded member, a pressing spring for restoring the tip of the driver bit to a predetermined position after screwing, and pressing the spring. A guide plate for receiving the position adjusting member; and an outer cylinder for receiving the screw holding member, the pressing spring, and the guide plate in the inner space thereof;
The driver bit has a tip for contacting and screwing the head of the screw, and a tip for inserting into an electric driver or a driver chuck of a driver as a hand tool.
The position adjusting member includes a stopper and a tightening nut, and the stopper has a base provided with a stopper through hole for inserting the driver bit, and a tapered surface is formed from the base toward the tip. It has an external thread with a split groove,
The screw holding member includes a substantially truncated conical tip portion and a substantially cylindrical main body portion, and a first through hole for inserting the screw and the driver bit into a substantially central portion of a circular cross section of the main body portion. And at least one of the second through holes provided at one end portion thereof with an attachment recess into which the holding member can be inserted, and radially passing from the outer surface of the main body portion to the first through hole A hole is provided, and a spherical holding mechanism for holding the head of the screw and an elastic body for holding the holding mechanism in the second through hole are inserted and disposed in the second through holes. A mounting protrusion is provided at the end opposite to the mounting recess,
The abutment member has a cylindrical contact portion having an upper surface portion with a contact surface for coming into contact with the surface, and a substantially frusto-conical inclined surface spreading downward from the lower end side base portion of the contact portion. An umbrella and a cylindrical handle on the side opposite to the contact side of the umbrella;
The outer cylinder has a substantially cylindrical shape, and one end is open, and the other end has an outer cylinder through hole for inserting the screw portion of the driver bit and the stopper at a substantially central portion. The guide plate is inserted into the inner space so as to be in contact with the bottom surface portion from the open one end portion.
The projection length of the tip of the driver bit inserted into and fitted to the driver chuck of the electric driver or a driver as a hand tool is adjusted by the position adjusting member, and the screw is inserted from the tip of the screw holding member. The screw is driven from the surface of the threaded member with a constant driving depth while applying a force to compress the pushing spring, and the elastic force of the pushing spring after driving completes the screw bit It is characterized in that the position of the tip portion is restored to a predetermined position.

  (2) In the jig for screw driving according to the present invention, in the pressing spring, it is preferable that the radius on the side facing the guide plate is larger than the radius on the side facing the screw holding member.

  (3) In the jig for screw driving according to the present invention, one end of the pressing spring is respectively provided on the surface of the screw holding member facing the pressing spring and the surface of the guide plate facing the pressing spring. It is preferably taken into account that a circumferential groove is provided which can be fitted.

  (4) Furthermore, in the jig for screw driving according to the present invention, preferably, the contact holding member, the screw holding member, the position adjusting member, and the outer cylinder are made of an aluminum alloy.

  The jig for screw driving according to the present invention can securely hold a fixing tool such as a screw at the end of a tool such as an electric screwdriver, and moreover, precisely and easily set the projection amount of the driver bit from the jig for screw driving. After the driving, the tip of the driver bit is restored to a predetermined position, and it is possible to drive a screw with a continuous and constant driving depth.

It is a schematic front sectional view which shows the use condition of the jig for screw driving of this invention. It is a disassembled front view showing one embodiment of a jig for screw driving of the present invention. It is the schematic sectional drawing which showed typically the attachment state of the position adjustment member to the driver bit in the jig for screw driving of this invention. (A) It is the perspective view which showed typically the screw holding member in the jig for screw driving of this invention. (B) is a schematic sectional drawing in the AA cross section of (A). (C) is a schematic sectional drawing in the BB cross section of (A). (A) It is the schematic perspective view which showed typically the stop member in the jig for screw driving of this invention. (B) is a schematic front sectional view in the CC cross section of (A). (A) It is the schematic front sectional drawing which showed typically the assembled state of the outer cylinder in the jig for screw driving of this invention, a position control member, a pushing spring, and a guide plate. (B) is the schematic plan view which showed typically the surface of the side facing the bottom face part of the outer cylinder in a guide plate. (C) is the schematic plan view which showed typically the surface of the side which opposes the press spring in a guide plate. (A), (B), (C), and (D) schematically show the operation state of each part when screwing a screw on the surface of a screwed member using an electric screwdriver equipped with the jig for screw driving of the present invention It is a schematic sectional view shown to.

  Hereinafter, the jig for screw driving according to the present invention will be described in detail based on the drawings.

  The screw driving jig can be detachably attached to a driver bit such as an electric driver.

  FIG. 1 is a schematic perspective view showing a use state of the screw driving jig of the present invention. FIG. 2 is an exploded perspective view showing an embodiment of the screw driving jig of the present invention.

  The screw driving jig 1 can keep the driving depth from the surface 21 of the screwed member 2 of the screw 3 constant when driving the screw 3 into the screwed member 2 as shown in FIG. It is a jig for screw driving. As shown in FIG. 2, the screw driving jig 1 includes at least a position adjusting member 5 for adjusting the projection length of the tip portion 41 of the driver bit 4 and the screw bit 4 from the screw driving jig 1, and at least a screw 3. Screw holding member 6 for holding head 31 and holding forward movement of position adjusting member 5, abutment member 7 brought into contact with surface 21 of threaded member 2, and screw 3 after driving screw 3 A push spring 8 for restoring the tip 41 to a predetermined position, a guide plate 9 for pressing the push spring 8 and receiving the position adjustment member 5, a screw holding member 6, a push spring 8 and a guide plate 9 And an outer cylinder 10 for housing the inner space 10a.

  Hereinafter, the configuration of the screw driving jig 1 of the present invention will be described in detail in order.

  As shown in FIG. 3, the driver bit 4 for mounting the screw driving jig 1 has a tip 41 fitted in a groove formed in the head 31 of the screw 3 and the electric driver 11 or a driver 11 as a hand tool. And an end portion 42 for fitting into the driver chuck 11a of the '. In such a driver bit 4, a circumferential arc groove 43 to which the electric chuck 11 or the driver chuck 11 a of the driver 11 ′ as a hand tool is coupled is formed in the vicinity of the tip end 41 and the end 42. be able to.

  The driver bit 4 may be a double-edged driver bit in which both the tip end portion 41 and the end portion 42 have the same plus driver shape, or may be a single-edged driver bit having a flat surface. If it is a double-edged driver bit, it can be used as the tip 41 for either of the two ends, which is preferable.

  The diameter Φ and the total length of the driver bit 4 can be appropriately changed in design as long as they can be mounted on a general electric driver 11 or a driver 11 ′ as a hand tool.

  The material of the driver bit 4 is not particularly limited as long as it is a metal material generally used for the driver bit. Further, in the driver bit 4, for the purpose of enhancing the holding power of the screw 3, it is preferably taken into consideration that the tip 4 is magnetized.

  In addition, in the jig 1 for screw driving of the present invention, by attaching a commercially available drill bit instead of the driver bit 4, it is also possible to carry out drilling from the surface of the material to be drilled continuously and at a constant drilling depth. .

  The position adjustment member 5 in the present embodiment is externally fitted to the driver bit 4 and can be mounted. As shown in FIG. 3, the position adjusting member 5 includes a stopper 51 and a tightening nut 52, and the stopper 51 has a base 51b provided with a stopper through hole 51a for inserting the driver bit 4 and a base 51b. A tapered surface is formed toward the tip end portion 51d, and an external thread portion 51c provided with a slit-like split groove 51e is provided.

The sectional shape of the stopper through hole 51 may be circular or may be a hexagon corresponding to the sectional shape of the driver bit 4. Among them, in consideration of interlocking of the driver bit 4 and the position adjustment member 5, it is preferable that the cross-sectional shape is a hexagon. The diameter of the stopper through hole 51 can be appropriately changed in design according to the diameter of the commercially available driver 4.
The number of dividing grooves 51e can be changed as appropriate, for example, three or six grooves. Among them, in consideration of reliable holding of the driver bit, it is preferable to set the number of the dividing grooves 51e to three.

By inserting the driver bit 4 into such a stopper through hole 51 and tightening the tightening nut 52, the width of the split groove 51e provided in the external thread portion 51c of the stopper 51 is gradually narrowed, and the stopper 51 is a driver bit. It will be fixed to 4 securely. By attaching the stopper 51 having such a shape to the driver bit 4, when the surface of the base 51 b of the stopper 51 facing the screw holding member 6 abuts on the mounting convex portion 68 of the screw holding member 6 described later, The movement limit of the tip portion 41 of the driver bit 4 can be reached, and the projection length of the tip portion 41 can be adjusted. Therefore, in the jig 1 for screw driving according to the present invention, by securely fixing the stopper 51 to the driver bit 4, the position and the projection length of the tip portion 41 of the driver bit 4 can be arbitrarily adjusted. For example, the position of the stopper 51 can be adjusted so that the surface 21 of the threaded member 2 and the head 31 of the screw 3 are flush with each other, or the head 31 of the screw 3 can be screwed The position of the stopper 51 can be adjusted to immerse about 1 to 3 mm from the surface 21 of the material 2, and in particular, immersing the head 31 of the screw 3 about 1 to 3 mm from the surface 21 of the threaded member 2 After screwing, the surface 21 of the material to be screwed 2 can be subjected to finishing treatment such as planing to finish on the floor surface, wall surface and ceiling surface excellent in appearance and touch.
The cross-sectional shape of the tightening nut 52 is, for example, a circular shape or a substantially rounded rectangular shape in which the circular arc portion is partially scraped off. It is also preferably considered that the end edge portion of the surface of the tightening nut 52 opposite to the stopper 51 and / or the surface opposite to the electric driver 11 is chamfered so that the corner is dropped. Thus, the position adjusting member 5 shown in FIG. 7C described later can be obtained by lowering the angle of the surface of the tightening nut 52 facing the stopper 51 and / or the surface facing the electric driver 11. When stored in the internal space 10 a of the outer cylinder 10, the tightening nut 52 can be smoothly stored without interference with the outer cylinder through hole 10 d of the outer cylinder 10.

When the tightening nut 52 is tightened, it may be tightened by hand, but it is preferable to use a tool such as a spanner. Further, for example, as a spanner, it is exemplified to use a flat hexagonal spanner etc. bundled with commercially available assembled furniture etc.
The materials constituting the stopper 51 and the tightening nut 52 constituting the position adjusting member 5 are not particularly limited as long as they can withstand wear due to contact with the rotating screw 3 and the driver bit 4. For example, it is exemplified to use duralumin which is an aluminum alloy, a stainless steel material or the like, and among them, it is preferably considered to use a stainless steel material from the viewpoint of wear resistance.
Furthermore, in consideration of miniaturization of the overall size of the screw driving jig 1, it is preferable to design the stopper 51 so that the total length thereof is short.

  The screw holding member 6 in the present embodiment, as shown in FIGS. 4A and 4B, includes a substantially truncated cone-shaped tip portion 61 and a substantially cylindrical main body portion 62. A first through hole 63 for inserting the screw 3 and the driver bit 4 is provided substantially at the center of the cross section, and an end on the tip 61 side has an attachment recess 64 into which the abutment member 7 can be inserted. ing. In the screw holding member 6, since the tip end portion 61 has a substantially truncated cone shape, it is easy to visually confirm the screwing position and the correct screw position, as compared with the conventional screwing amount adjusting tool.

  The cross-sectional shape of the first through hole 63 for inserting the driver bit 4 may be circular or may be a hexagon corresponding to the cross-sectional shape of the driver bit 4. Among them, in consideration of interlocking of the driver bit 4 and the screw holding member 6, it is preferable that the cross-sectional shape is a hexagon.

  Such a screw holding member 6 is axially movable in a state in which the driver bit 4 is inserted.

  Further, in the screw holding member 6, as shown in FIG. 4C, at least three second through holes 65 penetrating in the radial direction from the outer side surface 62a of the main body 62 to the first through holes 63 are provided. In these second through holes 65, there are a spherical holding mechanism 66 for holding the head 31 of the screw 3 and an elastic body 67 for holding the holding mechanism 66 in the second through holes 65. A mounting protrusion 68 is provided at the end opposite to the mounting recess 64, which is inserted and disposed. In such a screw holding member 6, by forming the holding mechanism 66 in a spherical shape, the radial movement of the holding mechanism 66 becomes smooth, and insertion and detachment of the screw 3 can be performed more smoothly.

  The second through hole 65 is formed such that the inner dimension in the radial direction is smaller than the outer diameter of the holding mechanism 66, and when the holding mechanism 66 is positioned radially inward in the second through hole 65, the inner side of the holding mechanism 66. The portion is projected to the inner periphery of the first through hole 63. Then, the outer periphery of the head portion 31 of the screw 3 is pressed from the front end side by the protruding portion of the holding mechanism 66.

  An elastic body 67 is attached to the holding mechanism 66 in the second through hole 65 from the outside, and each holding mechanism 66 is elastically urged inward in the radial direction by the inner peripheral surface of the outer cylinder 10 described later. Therefore, when the screw 3 is inserted from the front end side of the first through hole 63 of the screw holding member 6, the holding mechanism 66 expands in the radial direction by its elasticity to allow insertion of the screw 3 and the elastic body 67 It is pressed by the inner peripheral surface of the outer cylinder 10, and the screw holding member 6 is prevented from coming off with respect to the end portion 61 with respect to the screw 3 by elastic return.

  On the other hand, when the driver bit 4 is inserted into the screw holding mechanism 6 from the mounting convex portion 68 side of the first through hole 63, the holding mechanism 66 expands in the radial direction by its elasticity to allow insertion of the driver bit 4; The tip portion 41 of the driver bit 4 is mounted in a groove formed on the top surface of the head 3 of the screw 3, and the screw 3 is pivotally supported by the driver bit 4. Then, with the forward movement of the tip end portion 41 of the driver bit 4, the screw 3 is inserted into the insertion hole 74 of the contact stop member 7 described later, and then screwed into the surface 2 of the threaded member 2.

  Thus, the holding state of the screw 3 by each holding mechanism 66 and the elastic body 67 can be maintained, and when the screw 3 is inserted between the holding mechanisms 66 or released, the holding mechanism 66 The screw 3 can be attached and removed smoothly by allowing the outward movement in the radial direction. Therefore, after driving the screw 3 into the threaded member 2, it is possible to insert and hold another screw 3 in the first through hole 63 of the screw holding member 6 without performing a special operation. .

  Further, as shown in FIG. 4B, the screw holding member 6 is pressed against the surface of the main body 62 facing the pressing spring 8 for the purpose of fixing the housing position of the pressing spring 8 described later. It is preferably taken into account that a circumferential groove 69 is provided, into which one end of the spring 8 can be fitted. Thereby, the movement of the push spring 8 in the radial direction can be suppressed, and smooth restoration to the predetermined position of the position adjustment member 5 becomes possible.

  An attachment recess 64 is provided on the tip end 41 side of the screw holding member 6 as described above, and the abutment member 7 is inserted into the attachment recess 64.

  As shown in FIG. 5A, the contact stop member 7 has a cylindrical contact portion 71 provided on the upper surface portion with a contact surface 71a for contacting the surface 21 of the threaded member 2, and the contact portion An umbrella portion 72 having a substantially truncated cone-like inclined surface spreading downward from the lower end side base of 71, and a cylindrical handle 73 on the opposite side to the contact portion 71 side of the umbrella portion 72 There is.

  The contact surface 71a of the stop member 7 is formed substantially flat, which ensures positioning of the screw driving jig 1 and reduces rattling and the like, and damages the surface 21 of the threaded member 2 In addition, it can also function as a stopper for the driver bit 4.

  Further, an insertion hole 74 for inserting the screw 3 is formed in the contact surface 71a. The cross-sectional shape of the insertion hole 74 may be circular, or may be a hexagon corresponding to the cross-sectional shape of the driver bit 4. Among them, in consideration of the shape of the head 31 of the screw 3, it is preferable that the cross-sectional shape is circular.

  The diameter of the insertion hole 74 on the side of the contact portion 71 is slightly larger than the diameter of the head 31 of the screw 3 and the clearance is maintained. Therefore, the top surface of the head 31 of the screw 3 mounted on the tip end portion 41 of the driver bit 4 by the insertion hole 74 does not directly contact or interfere with the contact surface 71 a of the stopper member 7.

  By this, when the contact surface 71a abuts on the surface 21 of the threaded member 2 and the rotation of the stop member 7 is stopped, the occurrence of wear or the like due to relative rotation with the screw 3 is suppressed. Is possible.

  In the stopper member 7, since the umbrella portion 72 has a substantially truncated conical inclined surface spreading downward from the lower end side base portion of the contact portion 71, the same as the distal end portion 61 of the screw holding member 6 In addition, it is easy to visually confirm the screwing position and the correct screw position as compared with the conventional screwing amount adjusting tool.

When fitting such a stop member 7 to the mounting recess 64 of the screw holding member 6, the two members may be designed to be directly fit, as shown in FIG. 5 (B). As described above, it is also considered to provide the ball bearing 12 between the handle 73 of the stopper member 7 and the mounting recess 64 of the screw holding member 6. When the ball bearing 12 is provided, the stop member 7 can be rotated more smoothly. For example, when the contact surface 71a as the upper surface of the contact portion 71 of the abutting member 7 is brought into contact with the surface 21 of the screwed member 2 in a state where the electric driver 11 is operating, the screw holding member 6, position adjustment The member 5 and the outer cylinder 10 continue to rotate in conjunction with the rotation of the driver bit 4, but the stop member 7 does not interlock with the rotation of the driver bit 4 and is independently rotatable. Will stop. Thus, in the jig 1 for screw driving according to the present invention, it is difficult to give friction to the surface 21 of the screwed member 2 by the independently rotatable stopper 7, and the surface 21 of the screwed member 2 is damaged or There is almost no risk of discoloration or deterioration due to frictional heat.
The material of the stop member 7 is not particularly limited as long as it can withstand the friction with the threaded member 2 and the wear due to the contact with the rotating screw 3. For example, it is exemplified to use duralumin which is an aluminum alloy, a stainless steel material or the like, and among them, it is preferably considered to use a stainless steel material from the viewpoint of wear resistance.

The outer cylinder 10 has a substantially cylindrical shape as shown in FIG. 6A, and one end 10b is open, and the other end has an opening at the center of the driver bit 4 and the stopper 51. The bottom plate portion 10c has a bottom portion 10c in which an outer cylinder through hole 10d for inserting the screw portion 51c is opened, and the guide plate 9 is inserted into the inner space 10a from the open end portion 10b. It is inserted so that it may touch.
The outer cylinder 10 has a function as a cover that protects the holding mechanism 66 inserted and disposed in the second through hole 65 of the screw holding member 6 and the elastic body 67 from falling off the second through hole 65. There is.
Such dimensions of the outer cylinder 10 can be appropriately changed in design according to the dimensions of the position adjustment member 5, the screw holding member 6, the contact holding member 7, the push spring 8 and the guide plate 9 accommodated by the internal space 10a. is there. If the outer cylinder 10 can be reduced in size, it can contribute to the reduction in size and weight of the screw driving jig 1 as a whole, and the physical burden on the operator can be reduced. In addition, when driving the screw 3 into the threaded member 2, accurate grasping of the screwing position becomes easy.
The material of such an outer cylinder 10 is not particularly limited as long as it can withstand wear due to contact with the rotating screw 3 and the position adjusting member 5 rotating in conjunction with the driver bit 4. For example, it is exemplified to use duralumin which is an aluminum alloy, stainless steel and the like, and in consideration of the burden on the wrist of the user, it is preferable to use an aluminum alloy having a balance between lightness and strength.

  The guide plate 9 is provided with a circular guide plate through hole 91 at a substantially central portion, and the driver bit 4 is inserted through the guide plate through hole 91.

  Further, in the guide plate 9, a recess 9b is provided along the circumference of the guide plate through hole 91 on the surface 9a on the side facing the bottom surface portion 10c of the outer cylinder 10, as shown in FIG. It is preferably taken into consideration that they are formed. The surface of the base 51b of the stopper 51 on the opposite side to the external thread 51c can be fitted into the recess 9b. As a result, when the driver bit 4 advances, the base 51 b of the stopper 51 of the position adjustment member 5 does not shift in the circumferential direction, and the force can be reliably transmitted to the screw 3.

  In the guide plate 9, the surface 9a on the side facing the bottom surface portion 10c of the outer cylinder 10 and the base 51b of the stopper 51 may be designed to be flush or not flush with the base The guide plate 9 may be designed to protrude from the surface 9 a of the guide plate 9 on the side facing the bottom surface portion 10 c of the outer cylinder 10. From the viewpoint of downsizing of the jig 1 for screw driving, the surface 9a of the guide plate 9 on the side facing the bottom portion 10c of the outer cylinder 10 and the base 51b of the stopper 51 should be designed to be flush with each other. Is preferred.

  Further, as shown in FIG. 6C, the guide plate 9 is provided with a pressing spring 8 on the surface 9 c of the guide plate 9 facing the pressing spring 8 for the purpose of fixing the housing position of the pressing spring 8. It is preferably taken into account that a circumferential groove 92 is provided, into which one end 82 of the rear part can be fitted. Thereby, the displacement in the circumferential direction of the push spring 8 can be suppressed, and the restoration to the predetermined position of the position adjustment member 5 and the driver bit 4 can be made reliable.

  Further, in the pressing spring 8, as shown in FIG. 6A, it is preferable that the radius on the side facing the guide plate 9 is larger than the radius on the side facing the screw holding member 6. By making the shape of the pressing spring 8 in such a shape, when the pressing spring 8 is compressed, the inside of the circumference of the end portion 82 of the pressing spring 8 facing the guide plate 9 faces the screw holding member 6. Since the end 81 on the side to be stored is accommodated without interference, the elastic force of the push spring 8 can be maximized. Further, in particular, when the resilient force of the push spring 8 is strong, the size of the push spring 8 can be made smaller, so the size of the outer cylinder 10 can also be made smaller.

  The screw driving jig 1 according to the present invention has the above-described configurations, so that the front end portion 41 of the driver bit 4 inserted and fitted into the electric chuck 11 or the driver chuck 11 a of the driver 11 ′ as a hand tool. The projection length of the screw is adjusted by the position adjusting member 5, and the screw 3 is inserted and held from the tip end 61 side of the screw holding member 6, and the screw 3 is screwed while applying a force to compress the push spring 8. It is characterized in that driving is performed with a constant driving depth from the surface 21 of the composite material 2 and the position of the tip portion 41 of the driver bit 4 is restored to a predetermined position by the elastic force of the push spring 8 after driving.

  The case where screwing of the screw 3 is performed by the driver bit 4 equipped with such a screwing amount adjusting tool 1 will be described.

  First, as shown in FIG. 7 (A), the head 31 of the screw 3 is inserted between the spherical holding mechanisms 66 partially protruded into the first through holes 63 of the screw holding member 6, and the screws Hold 3 In this state, the screw 3 is securely held without coming off the holding mechanism 66 of the screw holding member 6. Here, as shown in FIG. 7B, in the internal space 10a of the outer cylinder 10, the driver bit 4, the position adjustment member 5, and the guide plate 9 are pushed against the spring 8 to open the outer cylinder 10 When it is moved to the end 10 b side, the tip 41 of the driver bit 4 is attached to the groove of the head 31 of the screw 3. In this state, the screw 3 is securely held without coming off the tip portion 41 of the driver bit 4 or being inclined, and the screw 3 can be easily screwed vertically to the surface 21 of the threaded member 2. The distance from the tip 41 and the end 42 of the driver bit 4 to the position adjustment member, that is, the fixed position does not change.

  When the pressing spring 8 is compressed to the limit by the driver bit 4, the position adjusting member 5 and the guide plate 9, as shown in FIG. 7C, the position at that time is the driver bit 4, the position adjusting member 5 and the guide It becomes the movement limit of board 9. In this process, the screw 3 attached to the tip end portion 41 of the driver bit 4 is disengaged from the holding mechanism 66 of the screw holding member 6, and the holding state is released. Then, by continuing the screwing, the screw 3 is supported by the driver bit 4 and is inserted into the insertion hole 74 of the abutting member 7 as the distal end portion 41 of the driver bit 4 advances. On the other hand, in the internal space of the outer cylinder 10, when the guide plate 9 reaches the movement limit of the opening 10b side of the outer cylinder 10, the guide plate 9 and the push spring 8 become stoppers and the tip 41 of the driver bit 4 It projects from the insertion hole 74 of the stopper 7 by a predetermined amount. At this time, as shown in FIG. 7C, the top surface of the head 31 of the screw 3 and the surface 21 of the threaded member 2 are on the same plane, or the top surface of the head 31 of the screw 3 is Screw 3 is screwed so as to be disposed at a depth of about 1 to 3 mm from surface 21 of screwing member 2.

  Furthermore, in the screw driving jig 1 of the present embodiment, as shown in FIG. 7D, after the screwing of the screw 3 to the surface 21 of the threaded member 2 is completed, the stop member 7 is When it is separated from the surface 21 of the screwing member 2, the driver bit 4 is restored to a predetermined position by the elastic force of the pressing spring 8. Therefore, the next screw 3 is immediately inserted into the first through hole 63 of the screw holding member 6. Thus, the screwing operation can be continued continuously.

  That is, according to the jig for screw driving 1 of the present embodiment, the catch function of the screw 3 by the screw holding member 6 prevents the screw 3 from coming off from the tip end portion 41 of the driver bit 4 and the like. The screw 3 can be screwed vertically to the surface 21 of the threaded member 2 by stabilizing the posture 3. Further, according to the jig for screw driving 1 of the present embodiment, the screwing amount of the screw 3 by the position adjusting member 5 can be arbitrarily set, and the adjuster function can reliably maintain the screwing amount. By this, it is possible to continuously screw the screws 3 with a fixed driving depth from the surface 21 of the threaded member 2 without depending on the judgment of the operator or the difference in skill.

  In the jig 1 for screw driving according to the present invention, the order of assembling the respective components is not particularly limited. For example, first, the external thread portion 51 c of the stopper 5 from the outer cylinder through hole 10 d After inserting and fitting near the end portion 42 of the driver bit 4 so as to protrude to the driver chuck 11 a side, the tightening nut 52 is locked to the male screw portion 51 c, and the guide plate 9 and the pressing spring 8 are Insert into the internal space 10a. Subsequently, the mounting convex portion 68 of the screw holding member 6 is inserted into one end of the push spring 8, and the handle 73 of the stopper 7 is inserted into the mounting concave portion 64 of the screw holding member 6. The outer cylinder 10 is mounted so as to cover the second through hole 65 of the member 6, the spherical holder 66 and the elastic body 67. Then, the tip end portion 41 of the driver bit 4 is penetrated so as to penetrate the stopper through hole 51 a of the position adjusting member 5, the outer cylinder through hole 10 d, the first through hole 63 of the screw holding member 6 and the insertion hole 74 of the contact stopping member 7. It is exemplified to insert and adjust and fix the position of the tip 41 of the driver bit 4 using the tightening nut 52.

  When the position adjusting member 5 is moved to the movement limit of the bottom surface 10c of the outer cylinder 10, that is, when the stopper 51 of the position adjusting member 5 contacts the bottom surface 10 of the outer cylinder 10, the tip of the driver bit 4 41 is accommodated in the first through hole 63 of the screw holding member 6, and when the electric driver 11 is not used, the screw holding member 6 plays a role of a guard for the tip 4 of the driver bit 4 The tip 4 is prevented from coming in contact with an external one to be damaged, or the tip 4 itself is broken. Further, in a state before the screw 3 starts to be screwed, the head 31 of the screw 3 mounted on the tip end portion 41 of the driver bit 4 is also accommodated in the first through hole 63 of the screw holding member 6, It becomes possible to insert the stop member 7 into the mounting recess 64 of the sixth.

  The present invention can be appropriately changed in design without being limited to the embodiment described above. For example, as materials of the abutting member 7, the screw holding member 6, the position adjusting member 5 and the outer cylinder 10, both strength and lightness can be achieved. The material is not particularly limited as long as it is possible, for example, it is exemplified that it is made of resin or metal material, and among them, it is preferably considered to be made of aluminum alloy as the metal material. If these members are made of aluminum alloy, it is possible to achieve both the strength and lightness required for the jig 1 for screw driving, and the burden on the wrist of the operator and fatigue in the screw driving operation over a long period of time It can be reduced.

  Further, the screwing amount adjusting tool 1 of the present invention can be used by being attached not only to the driver bit 4 of the electric driver 11 but also to a driver 11 'as a hand tool.

Reference Signs List 1 screw driving jig 2 screwed member 21 surface 3 screw 31a head 4 driver bit 41 tip 42 end 5 position adjustment member 51 stopper 51a stopper through hole 51b base 51c external thread 51d tip 51e split groove 52 tightening Nut 6 Screw holding member 61 Tip portion 62 Main portion 62a Outer surface 63 First through hole 64 Mounting recess 65 Second through hole 66 Holding mechanism 67 Elastic body 68 Mounting convex portion 7 Contact stop member 71 Contact portion 71a Contact surface 72 Umbrella Section 73 handle 74 insertion hole 8 pressing spring 81, 82 end 9 guide plate 10 outer cylinder 10a internal space 10b end 10c bottom 10d outer cylinder through hole 11 electric driver 11 'driver 11a driver chuck 12 ball bearing

Claims (4)

A screw driving jig capable of maintaining a constant driving depth of the screw from the surface of the screwed member at the time of screwing into the screwed member,
At least a driver bit, a position adjusting member for adjusting a projection length of a tip portion of the driver bit from the screw driving jig, a head of the screw and holding the forward movement of the position adjusting member. A screw holding member, a stop member for bringing the screw bit into contact with the surface of the threaded member, a pressing spring for restoring the tip of the driver bit to a predetermined position after screwing, and pressing the spring. A guide plate for receiving the position adjusting member; and an outer cylinder for receiving the screw holding member, the pressing spring, and the guide plate in the inner space thereof;
The driver bit has a tip for contacting and screwing the head of the screw, and a tip for inserting into an electric driver or a driver chuck of a driver as a hand tool.
The position adjusting member includes a stopper and a tightening nut, and the stopper has a base provided with a stopper through hole for inserting the driver bit, and a tapered surface is formed from the base toward the tip. It has an external thread with a split groove,
The screw holding member includes a substantially truncated conical tip portion and a substantially cylindrical main body portion, and a first through hole for inserting the screw and the driver bit into a substantially central portion of a circular cross section of the main body portion. And at least one of the second through holes provided at one end portion thereof with an attachment recess into which the holding member can be inserted, and radially passing from the outer surface of the main body portion to the first through hole A hole is provided, and a spherical holding mechanism for holding the head of the screw and an elastic body for holding the holding mechanism in the second through hole are inserted and disposed in the second through holes. A mounting protrusion is provided at the end opposite to the mounting recess,
The abutment member has a cylindrical contact portion having an upper surface portion with a contact surface for coming into contact with the surface, and a substantially frusto-conical inclined surface spreading downward from the lower end side base portion of the contact portion. An umbrella and a cylindrical handle on the side opposite to the contact side of the umbrella;
The outer cylinder has a substantially cylindrical shape, and one end is open, and the other end has an outer cylinder through hole for inserting the screw portion of the driver bit and the stopper at a substantially central portion. The guide plate is inserted into the inner space so as to be in contact with the bottom surface portion from the open one end portion.
The projection length of the tip of the driver bit inserted into and fitted to the driver chuck of the electric driver or a driver as a hand tool is adjusted by the position adjusting member, and the screw is inserted from the tip of the screw holding member. The screw is driven from the surface of the threaded member with a constant driving depth while applying a force to compress the pushing spring, and the elastic force of the pushing spring after driving completes the screw bit A screw driving jig characterized in that a position of a tip end portion is restored to a predetermined position.   2. The screw driving jig according to claim 1, wherein a radius of the side facing the guide plate in the push spring is larger than a radius of the side facing the screw holding member.   A circumferential groove to which one end of the pressing spring can be fitted is provided on the surface of the screw holding member facing the pressing spring and the surface of the guide plate facing the pressing spring. The jig for screw driving according to claim 1 or 2, characterized in that   The jig for screw driving according to any one of claims 1 to 3, wherein the contact-stopping member, the screw holding member, the position adjusting member, and the outer cylinder are made of an aluminum alloy.