JP2016052714A - Drill guide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drill guide that can be attached easily to a drill.SOLUTION: A plurality of extendable bars, whose front ends are fixed to a pressing plate perpendicularly and rear ends are fixed to an adoptor, are provided between the pressing plate and the adoptor. The adoptor coincides with a shape of an attachment part of a drill tip part and has a cut part in which a predetermined portion is cut in a perpendicular direction to a rotary shaft of a drill. Two flanges protruding in the perpendicular direction to the rotary shaft are provided on opposing surfaces of the cut part. A fastening tool fastens the adoptor to the tip of the drill by using the two flanges. The fastening tool attaches the adoptor to the drill by sandwiching the two flanges from the outside with a U-shaped knob and fastening the adoptor to the drill.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a drill guide, and more particularly to a drill guide that can be easily mounted on a drill body.

  A drill guide is used as a jig for pressing the drill blade precisely in the vertical direction against the workpiece. The drill guide is generally stationary, but it cannot be moved. For example, in Japanese Patent Application Laid-Open No. 2011-36972, a movable drill is used as a guide, and an elastic slide guide that constitutes the drill guide is attached to a guide holder that is integrally formed with the drill body at the tip of the drill. Yes.

  On the other hand, in order to press the drill blade strongly against the workpiece, a grip protruding perpendicular to the direction of the drill blade is attached to the tip of the drill, and the grip is used when drilling holes in hard objects. A drilling operation is performed while applying force in the direction of a hole to be pressed and opened. For example, in the example disclosed in Japanese Patent Application Laid-Open No. 2002-205285, a ring is fixed to the tip of the grip, and the ring is fastened to the cylindrical portion of the drill tip.

  Japanese Patent Laid-Open No. 2011-36972 discloses that a grip is attached to a drill using a female screw provided on a drill body with a male screw provided at a tip of the grip.

JP 2011-36972 A JP 2002-205285 A

  In JP-A-2011-36972, as described above, an extensible slide guide constituting the drill guide is attached to a guide holder integrally formed with the drill body at the tip of the drill. With this configuration, although it is possible to operate by holding the drill with the drill guide attached, it is necessary to form the guide holder integrally with the drill body, and there is a disadvantage that the cost of the drill body increases. Furthermore, there is a drawback that the drill guide needs to be attached to the drill, which is troublesome and difficult to handle.

  In the above two prior arts, the drill guide and the grip are separate bodies, and preparing both increases the number of parts. In addition, the transportation and use are extremely complicated.

  The present invention has been proposed in view of the above-described conventional circumstances, and it is an object of the present invention to provide a drill guide that can be easily attached to a drill body and also serves as a grip.

  The present invention is characterized by having the following configuration.

  Provided with a pressing plate and an adapter having a cutting part that matches the shape of the drill tip and cut in the direction of the rotation axis of the drill, and a plurality of telescopic bars are attached to the pressing plate. Is fixed vertically and the rear end is fixed to the adapter.

  The opposing surfaces of the cutting part of the adapter protrude in the direction perpendicular to the rotation axis to form two hooks, and the adapter is fastened to the tip of the drill with a fastener using the two hooks. It was set as the structure to wear.

  The fastener is a U-shaped knob that straddles two ridges, and the side plate that forms the U-shape is pivotally supported by the two ridges, and the side plate that forms the U-shape ties the two ridges. It can be set as the structure which fastens an adapter to the front-end | tip part of a drill by rotating in the direction which pinches | interposes and fits.

  In addition, a stopper can be provided that prevents reverse rotation of the knob when the side plate forming the U-shape sandwiches and fits the two hooks. Moreover, it can be set as the structure which attaches a grip to the rear end of the said knob so that attachment or detachment is possible.

  A template having a contact surface along the shape of the workpiece can be attached to and detached from the lower surface of the pressing plate.

  The operator first inserts the tip of the drill into the adapter and tightens the knob of the fastener. As a result, the operation can be performed with the drill guide attached. Moreover, it can be set as the drill guide which served as the grip by setting it as the structure which attaches a grip to the rear end of a knob.

The perspective view which shows the state before the attachment to the drill of this invention. The figure which shows the state which looked at the fastening tool of this invention from the bottom. The perspective view which shows the state after the attachment to the drill of this invention. The perspective view which shows the state before giving the grip function to the knob of this invention and attaching. The perspective view which shows the state before giving the grip function to the knob of this invention and attaching. FIG. 4 is an enlarged plan view of FIG. 3. The side enlarged view when not in use. Side enlarged view when in use, 7C-C enlarged view. The figure which shows a cyclic | annular pressing plate. The figure which shows another Example of an expansion-contraction bar The figure which shows a template. The perspective view which shows an example of the attaching part of a drill guide.

(Embodiment 1)
FIG. 1 is a perspective view when the present invention is not used, FIG. 2 is a perspective view of a fastener described below, and FIG. 3 is a perspective view when the present invention is used.

  A drill guide including a pressing plate, an extendable bar, and an adapter is configured as follows.

  The distal ends of three telescopic bars 20 are vertically attached to the horseshoe-shaped pressing plate 10 in which the center (position where the drill blade hits) is cut. An adapter 30 to the drill is fixed to the rear end of the telescopic bar 20 to fix the position of the telescopic bar 20 and to be detachable from the drill body as described below. The adapter 30 is a ring body 301 having a diameter that matches the diameter of the columnar attachment portion 70 (see FIG. 13) at the tip of the drill body, and has three bulging portions 33 around it. The rear end of the telescopic bar 20 is fixed to the bulging portion 33.

  The inner diameter of the ring body 301 of the adapter 30 matches the outer diameter of the attachment part 70 at the tip of the drill, and the drill guide can be attached to the drill body by inserting the ring body 301 into the attachment part 70. it can.

  When the adapter 30 is mounted on the drill tip, a fastener 50 described below is used.

  The ring body 301 constituting the adapter 30 has a cutting portion 31 cut at one place in the axial direction (the direction of the drill blade). The cutting portions 31 are respectively provided with ridges 32 and 32 protruding in a direction perpendicular to the axial direction from the opposing cut surfaces, and a fastening tool 50 described below at the upper part outside the ridges 32 and 32. The tip of the shaft is pivotally supported by a support shaft 502 (the support shaft is tangential to the ring).

  The fastener 50 is integrally formed by connecting two side plates 501 located on both sides of the flanges 32 and 32 in a U-shape with the top plate 506 at the upper end so as to straddle the flanges 32 and 32, The knob is open at the bottom in a horizontal state. The support shaft 502 is passed between the side plates 501 via the flanges 32 and 32, and the fastener 50 is rotatably supported to form the following non-use state and use state. That is, the top plate 506 is horizontal in a state where it covers the upper surfaces of the ridges 32 and 32, forms a non-use state, and in a state where it covers the side surfaces (tangential surfaces) of the ridges 32 and 32. It becomes vertical (parallel to the drill axis) and forms a use state.

  The width of the U-shaped open side coincides with the combined width of the two flanges 32 and 32, but the ring body 301 is positioned below the support shaft 502 inside the side plates 501 and 501 in the use state. The protrusions 34 and 34 slightly raised in the tangential direction are provided, and this portion is smaller than the combined width of the flanges 32 and 32.

  Further, a blade 503 having a predetermined length projects from the center of the top end of the top plate 506, while a V-shaped clearance is provided on the side surface side of the cutting portion 31 of the barbs 32 and 32. As a result, as will be described later, in the use state, the tip of the blade 503 does not interfere with the scissors 32 and 32 (FIG. 2, two-dot chain line), and the transition of the scissors 32 and 32 to the non-use state occurs. It cuts into the cutting part 31 (FIG. 2, solid line, FIG. 3).

  In this way, the fastener 50 is configured, and with the top plate 506 of the knob in a horizontal state (non-use state), the ring body 301 is attached to the attachment portion 70 of the drill body, The top plate 506 is pressed around the support shaft until the top plate 506 becomes vertical, and the side plates 501 and 501 having the U-shaped shape are pressed so as to sandwich the flange 32.32. As a result, the projections 34 and 34 press the flanges 32 and 32 from both sides, the cutting portion 31 is tightened, and the ring body 301 is tightened (use state), and a drill as shown in FIG. The guide will be easily attached to the drill. In the state of use, the protrusions 34 and 34 are positioned below the support shaft 502. Further, the blade 503 is in a state where it does not interfere with the flanges 32 and 32.

  By attaching the adapter 30 to the attachment portion 70 at the tip of the drill in this way, the horseshoe-shaped notched portion of the pressing plate 10 corresponds to the position of the drill blade. Accordingly, when the drill is pressed against the work piece against which the pressing plate 10 is pressed against the telescopic bar 20, the drill blade presses against the work piece in the horseshoe-shaped cut portion vertically. Can be drilled at right angles.

  In order to remove the drill guide after completion of the drilling operation, the knob that has been pushed in is rotated and opened around the support shaft 502, and the pressing of the flanges 32 and 32 by the projections 34 and 34 is released. The tip of the blade 503 fits into the cutting portion 31 of the adapter 30 and widens the gap between the cut surfaces, so that the ring 301 is easily detached from the mounting portion 70. As a result, the drill guide is easily detached from the drill and returned to a non-use state.

  Although the pressing plate 10 has a horseshoe shape, the invention is not limited thereto, and a plate provided with a hole or a cut at a position where the drill blade hits is sufficient. For example, as shown in FIG. 10, it may be an annular shape with a hole in the center.

  In FIG. 1, the telescopic bar is configured to push up the inner rod 22 with a spring fitted into the outer cylinder 21, but as shown in FIG. 11, the adapter 30 is pushed up directly with a spring 24 fitted into the support shaft 23. It is good. In this case, the support shaft 23 is slidably inserted into the hole 36 provided in the bulging portion 33.

  Further, although the protrusions 34 are provided on the fastening tool 50 side, it is needless to say that the protrusions 34 may be provided on the flange 32 side.

(Embodiment 2)
4 is a perspective view when the drill guide of the present invention is not used, FIG. 5 is a perspective view when used, FIG. 6 is an enlarged plan view of FIG. 4, FIG. 7 is an enlarged side view when not used, and FIG. FIG. 9 is an enlarged side view of FIG. 8C-C.

  The configuration of the drill guide body including the pressing plate 10, the telescopic bar 20, and the adapter 30 is the same as that shown in FIG.

  When the adapter 30 is mounted on the drill tip, a fastener capable of mounting a grip described below is used.

  As in FIG. 1, the fastener 50 is configured such that the side plates 501 and 501 on both sides of the flange 32 are connected in a U shape by a top plate 506. Further, as in FIG. 1, the shafts 32 and 32 are pivotally supported. In FIG. 1, the projections 34 and 34 are configured to be positioned below the shaft 502 in use, but this embodiment In the form, the projections 34 and 34 are configured to be positioned above the support shaft 502 in the use state. Further, a grip 80 usually used for a drill can be screwed to the rear end of the fastener 50.

  When the fastener 50 pivotally supported by the collars 32 and 32 is not in use (FIGS. 4, 6, and 7), the top plate 506 hangs down in a direction parallel to the telescopic bar 20, and the side plate 501. 501 is in a state of being removed from the ridges 32 and 32. On the other hand, when in use (FIGS. 5 and 8), the fixing tool (knob) 50 is rotated about the support shaft 502 in the radial direction of the ring body 301 of the adapter 30 so that the top plate 506 is the upper surface of the flanges 32 and 32. The side plates 501 and 501 are in a state of sandwiching the flanges 32 and 32.

  By opening the fastener 50 as described above, the ring body 301 of the adapter 30 can be fastened to the attachment portion 70 of the drill body. That is, the two flanges 32 and 32 are tightened from the outside by the projections 34 and 34 provided on the inner side of the two side plates 501 and 501 constituting the fastener 50. As a result, the ring body 301 is fastened to the mounting portion 70, and the entire guide is fastened to the drill body. At this time, the fastener 50 (knob) is prevented from returning to the original state by the stopper 60 as described below.

  As shown in FIG. 9, the stopper 60 has projections 60a elastically projecting from the flanges 32 and 32 in the tangential direction of the adapters 30 to the flanges 32 and 32, and holes of side plates 501 and 501 on the side of the fasteners 50 fitted therein. 60b. When the fastener 50 is opened from the bottom to the top (rotates about the support shaft 502), the edge 51 at the tip of the fastener 50 slides on the roundness 63 on the back side of the protrusion 60a against the elasticity. When the fastening tool is opened horizontally, the edge 61 provided on the side opposite to the back side of the projection 60a meshes with the edge 62 of the hole 60b of the side plates 501 and 501 so that the fastening is performed. The tool 50 is prevented from returning.

  With the drill guide attached to the drill as described above, as shown in FIG. 5, the male screw 81 at the tip of the grip 80 prepared separately is screwed into the female screw 39 provided at the rear end of the knob. Make it easier to apply force to the drill.

  Thus, the operator can hold the drill with one hand and hold the grip 80 with the other hand to perform a drilling operation.

  On the other hand, when the work is completed and the drill guide 50 is desired to be removed from the drill, the grip 80 is first removed. Next, the projection 60a is pushed from the outside to the inside with a finger to release the mesh between the edge 62 of the side plates 501 and 501 and the edge 61 on the projection side. Turn in the direction parallel to the telescopic bar. As a result, the U-shaped inner side of the fastener 50 is removed from the projections 60a provided on the collars 32 and 32, and the projections 34 and 34 are released from the state where the two collars 32 are pressed down, and the adapter 30 is moved to the drill. Tightening is released.

  As described above, according to the present invention, the drill guide has a simple configuration, and the configuration in which the drill guide is attached to the drill has been simplified. Can make holes at right angles. In addition, since it is possible to easily attach the holding grip at the time of drilling operation to the fastening tool, it is not necessary to provide a structure for attaching the grip on the drill body side, and there is a space merit. Moreover, since the drill guide can be attached to the drill simply by opening the fastener, the fixing operation is extremely simple.

  In this embodiment, it is needless to say that the projections 34, 34 may be provided outside the flanges 32, 32. As in the first embodiment, the top plate 506 of the knob is provided with a blade 503 that does not interfere with the flanges 32 and 32 in the non-use state and bites into the cutting portion 31 when shifting from the use state to the non-use state. Also good.

<Embodiment 3>
FIG. 12 shows a template 200 that can be mounted on the underside of the pressing plate 10 to accurately drill holes in a shape other than the plane of the workpiece. The template 200 has a contact surface 201 (lower surface) that follows the shape of the object (here, the tube body 300), and has a shape that can be attached to the pressing plate 10. A non-slip material 201 such as rubber is used for the contact surface. Further, it is sufficient to attach the template 200 to the pressing plate 10 by using, for example, screwing.

  According to the present invention, a hole can be formed at a right angle with respect to a workpiece even when a drill operation is performed by hand.

DESCRIPTION OF SYMBOLS 10 Pressing plate 20 Telescopic bar 30 Adapter 31 Cutting part 32 部 33 Swelling part 34 Protrusion 50 Fastener
70 Mounting portion 60 Stopper 60a Stopper projection 60b Stopper hole 61 Edge 62 Hole edge 63 Roundness 70 Mounting portion 200 Template 201 Rubber 301 Ring body 501 Fastener side plate 502 Fastener spindle 503 Blade 506 Fastener top Board

Claims (5)

A pressing plate,
An adapter having a cutting portion that matches the shape of the drill tip and that has a predetermined portion cut in the direction of the rotation axis of the drill,
A plurality of telescopic bars, the front end of which is vertically fixed to the pressing plate and the rear end is fixed to the adapter;
Two ridges each projecting in a direction perpendicular to the axis of rotation, the opposing surfaces of the cut portion of the adapter,
A fastener that fastens the adapter to the tip of the drill using the two rods;
A drill guide characterized by comprising: The fastener is
The fastener is a U-shaped knob that straddles two ridges, and a tip side of a side plate that forms a U-shape is pivotally supported by the two ridges, and a side plate that forms the U-shape supports the two ridges. The drill guide according to claim 1, wherein the adapter is fastened to the tip of the drill by rotating in a direction in which the adapter is inserted.   The drill guide according to claim 2, further comprising a stopper that prevents reverse rotation of the knob when the side plate that forms the U-shape sandwiches and fits the two hooks. The drill guide according to claim 3, wherein a grip can be detachably attached to a rear end of the knob. The drill guide according to claim 1, wherein a template having a contact surface along the shape of the workpiece can be attached to and detached from the lower surface of the pressing plate.

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