JP3211883U - Tip tool for electric drill - Google Patents

Abstract

A tip tool for an electric drill capable of efficiently performing work is provided. An electric drill tip tool is provided with an attaching / detaching portion that is attached to and detached from a plus bit, and a blade portion that is provided on the leading end side of the attaching / detaching portion. And a detachable main body 12 having an insertion hole through which the insertion hole is inserted and a locking hole penetrating in a direction orthogonal to the insertion hole as an axis, a steel ball 26 disposed in the locking hole, and a detachment using the insertion hole as an axis The slide collar 20 is arranged around the main body portion 11 and moves to the front end side or the rear end side with respect to the detachable main body portion 11, and a coil spring 25 that biases the slide collar 20 toward the front end side. [Selection] Figure 1

Description

  The present invention relates to a tip tool for an electric drill that is attached to and detached from an electric drill.

  2. Description of the Related Art Conventionally, there are various types of bits that can be attached to and detached from an electric drill depending on the application, such as a driver bit, a core drill, a twist drill, and a hole saw (hereinafter collectively referred to as “drill bit”). . For example, a hole saw described in the following Patent Document 1 has a blade attached to the tip of a shank, and the blade is provided with a cylindrical cutter around a center drill. The hole saw is fixed to the electric drill by attaching the shank to the chuck.

  Since the drill bit is changed depending on the application, for example, when hitting a screw on the concrete wall, first attach the shank of the concrete drill bit to the chuck, drill a pilot hole in the wall with the concrete drill bit, Remove the concrete drill bit, attach a Phillips screwdriver bit to the chuck, and screw the screw into the pilot hole with the screwdriver bit.

Registered Utility Model No. 3033583

  However, as described above, there are various types of drill bits depending on the application. At the work site, the drill bit is replaced every time the application is used, so that the replacement is troublesome and the work is not efficient.

  The present invention has been proposed in view of the above circumstances. That is, it aims at provision of the tip tool for electric drills which can work efficiently.

  To achieve the above object, an electric drill tip tool according to the present invention includes an attaching / detaching portion that is attached / detached to / from a screwdriver bit having a shape corresponding to a tool hole in a screw head, and the screwdriver bit is attached / detached at the attaching / detaching portion. And a blade portion provided on the tip side opposite to the side to be provided.

  The tip tool for an electric drill according to the present invention is such that the detachable portion has an insertion hole into which the driver bit is inserted, and an attachment / detachment main body portion having a locking hole penetrating in a direction orthogonal to the insertion hole as an axis, A locking member disposed in the locking hole; a moving member disposed around the detachable main body around the insertion hole; and moving in an axial direction with respect to the detachable main body; and An urging member that urges toward the distal end side, and the moving member is disposed on the distal end side so that the locking member projects toward the insertion hole and locks to the driver bit. In the state where the moving member is disposed on the side opposite to the distal end side, the locking member is accommodated in the locking hole and detached from the driver bit.

  The tip tool for an electric drill according to the present invention is characterized in that the blade portion has a disk shape centered on the axis of the insertion hole.

  In the tip tool for an electric drill according to the present invention, a guide member applied to a member to be cut is provided in the driver bit, and a cutting position of the member to be cut is adjusted according to a distance between the guide member and the blade portion. It is characterized by that.

  The tip tool for an electric drill according to the present invention is characterized in that the guide member has a flange portion that is penetrated and attached to the driver bit and projects in a direction perpendicular to the driver bit.

  The tip tool for an electric drill according to the present invention has the above-described configuration. That is, since the power drill tip tool is directly attached to and detached from the driver bit, it is not necessary to replace the power drill tip tool from the driver bit. Therefore, work can be efficiently performed.

  The tip tool for an electric drill according to the present invention includes: an attachment / detachment body portion having an insertion hole into which a driver bit is inserted; and an attachment / detachment main body portion having an engagement hole penetrating in a direction perpendicular to the insertion hole. A locking member arranged in the hole, a moving member arranged around the detachable main body with the insertion hole as an axis, and moving in the axial direction with respect to the detachable main body, and a bias for urging the moving member toward the tip side And a member. With this configuration, the power drill tip tool is attached to and detached from the driver bit by moving the moving member in a state where the driver bit is inserted into the insertion hole of the attachment / detachment main body. Therefore, it is easy to attach and detach the power drill tip tool, and the work can be efficiently performed.

  The tip tool for an electric drill according to the present invention has a disk shape in which the blade portion is centered on the axis of the insertion hole. Therefore, for example, the pipe can be cut to a desired length by applying the blade portion to the inside of the pipe.

  In the tip tool for an electric drill according to the present invention, a guide member applied to the member to be cut is provided in the driver bit, and the cutting position of the member to be cut is adjusted according to the interval between the guide member and the blade portion. Therefore, for example, when the member to be cut is a pipe, the length from the end of the pipe to the cut portion is matched with the length from the guide member to the blade portion, and the guide portion is applied to the end of the pipe to accurately The pipe can be cut at the cutting position.

  In the tip tool for an electric drill according to the present invention, the guide member has a flange portion that is attached so as to penetrate the driver bit and projects in a direction perpendicular to the driver bit. Therefore, the pipe can be accurately cut at the cutting position by applying the flange portion to the end of the pipe.

The state which the tip tool for electric drills which concerns on embodiment of this invention was attached to the positive driver bit is shown, (a) is a side external view, (b) is side sectional drawing. The attachment / detachment part of the tip tool for electric drills which concerns on embodiment of this invention is shown, (a) is a side external view, (b) is side sectional drawing. The attachment / detachment part of the tip tool for electric drills which concerns on embodiment of this invention is shown, (a) is a side external view, (b) is side sectional drawing. The connection member which connects the attachment or detachment part and blade part of the tip tool for electric drills which concern on embodiment of this invention is shown, (a) (b) is an external appearance perspective view, (c) is an external appearance side view, (d). It is side surface sectional drawing. It is a use condition general | schematic fragmentary sectional view by which the use condition of the tip tool for electric drills which concerns on embodiment of this invention was shown.

  Below, the tip tool for electric drills concerning the embodiment of the present invention is explained based on a drawing. FIG. 1 shows a state in which a power drill tip tool 10 is attached to a plus bit 1 as a driver bit. 2 and 3 show the attaching / detaching portion 11. FIG. 4 shows the connecting member 30. FIG. 5 shows the usage state of the power drill tip tool 10. In the following description, as shown in FIG. 1, in the power drill tip tool 10, the side on which the plus bit 1 is attached is the rear end side, and the side opposite to the rear end side is the front end side. A direction perpendicular to this axis is defined as a side with a hole into which the plus bit 1 is inserted as an axis.

  In the following description, the plus bit 1 will be described as an example, but the driver bit is arbitrary as long as it has a shape corresponding to a tool hole formed in the head of a screw (not shown). Therefore, if the tool hole is minus, a minus bit may be used, and the power drill tip tool 10 may be attached to and detached from the minus bit.

  As shown in FIG. 1, the power drill tip tool 10 includes an attaching / detaching portion 11 attached to and detached from the plus bit 1, a connecting member 30 connected to the leading end side of the attaching / detaching portion 11, and the connecting member 30. It is comprised from the blade part 27 connected to the front end side.

  The detachable portion 11 includes a substantially cylindrical detachable main body portion 12, a cylindrical shape coaxial with the detachable main body portion 12, and a slide collar 20 as a moving member disposed on the outer periphery of the detachable main body portion 12. A coil spring 25 as an urging member disposed between 12 and the slide collar 20 and a spherical steel ball 26 as a locking member provided in the detachable main body 12 are provided.

  As shown in FIG. 2, the detachable main body 12 is a cylinder whose rear end side is open and whose front end side is closed, and an insertion hole 13 into which the plus bit 1 is inserted is formed from the rear end side in the axial direction. Has been. The insertion hole 13 is a hexagon corresponding to the shape of the side surface of the plus bit 1. The detachable main body 12 has an enlarged diameter portion 14 in which the outer diameter of the intermediate portion between the front end side and the rear end side is formed larger than the front end side and the rear end side. The detachable body portion 12 is formed with an edge groove 15 along the edge of the rear end, and the edge groove 15 is formed around the outer peripheral surface of the detachable body portion 12. Further, the detachable main body 12 has a main body male screw portion 16 formed on the outer peripheral surface on the distal end side. The attachment / detachment main body 12 has a locking hole 17 penetrating in a direction orthogonal to the insertion hole 13 on the rear end side of the enlarged diameter portion 14. The locking holes 17 are formed as a pair on the two facing surfaces of the hexagon of the insertion hole 13. A steel ball 26 is disposed in the locking hole 17.

  The steel ball 26 freely moves in the locking hole 17 and protrudes from the insertion hole 13 or is accommodated in the locking hole 17 (see FIG. 3). Here, since the diameter of the locking hole 17 is slightly smaller than that of the steel ball 26 on the insertion hole 13 side, the steel ball 26 is engaged with the locking hole 17 in a state of protruding toward the insertion hole 13. Stopped. In other words, the steel ball 26 does not fall into the insertion hole 13.

  The slide collar 20 is a cylinder having an opening on the front end side and the rear end side, and a stepped portion 21 projecting inward is formed on the inner peripheral surface in the vicinity of the intermediate portion between the front end side and the rear end side. ing. The step portion 21 is formed in an annular shape around the inner peripheral surface of the slide collar 20. The slide collar 20 is appropriately formed with knurls on the outer peripheral surfaces on the front end side and the rear end side.

  The slide collar 20 is attached in a state in which the stepped portion 21 is hooked on the enlarged diameter portion 14 of the removable main body portion 12 from the rear end side. The stepped portion 21 is caught by the enlarged diameter portion 14 and closes the locking hole 17 from the outer peripheral surface side of the detachable main body portion 12.

  The coil spring 25 is passed through the rear end side of the detachable main body 12, and the rear end side is locked to the edge groove 15. The coil spring 25 is engaged with the step portion 21 of the slide collar 20 at the distal end side. That is, the slide collar 20 is urged toward the distal end side with respect to the detachable main body 12 by the coil spring 25. Therefore, when an external force is applied to the slide collar 20 against the restoring force of the coil spring 25, the coil spring 25 is compressed as shown in FIG. Move toward the rear end. On the other hand, when the slide collar 20 is released from the external force, as shown in FIG. 2, the coil spring 25 extends, and the slide collar 20 moves toward the distal end side with respect to the detachable main body 12 by the restoring force. To do.

  As shown in FIG. 2, in the state where the slide collar 20 is arranged on the distal end side, the locking hole 17 of the detachable main body portion 12 is closed by the step portion 21 and the steel ball 26 is pushed to insert the insertion hole. Projects to the 13th side. Therefore, in this state, when the plus bit 1 is inserted into the insertion hole 13 of the detachable main body 12, the plus bit 1 is prevented from being caught by the steel ball 26 and inserted into the insertion hole 13.

  On the other hand, as shown in FIG. 3, in a state where the slide collar 20 is arranged on the rear end side, the stepped portion 21 is displaced from the locking hole 17 of the detachable main body 12 and the locking hole 17 is opened. . Therefore, when the plus bit 1 is inserted into the insertion hole 13, the steel ball 26 is pushed by the plus bit 1 and the steel ball 26 is received in the locking hole 17. In other words, the plus bit 1 is inserted into the insertion hole 13 without being caught by the steel ball 26.

  As shown in FIG. 2, when the slide collar 20 is disposed on the tip side again by the restoring force of the coil spring 25, the locking hole 17 is closed by the step portion 21, and the steel ball 26 is inserted into the insertion hole 13. Overhang to the side. Accordingly, the steel ball 26 is locked in the locking groove 2 of the plus bit 1 in the insertion hole 13, and the plus bit 1 is not removed from the insertion hole 13 (see FIG. 1).

  As shown in FIG. 3, when an external force is applied and the slide collar 20 is disposed again on the rear end side, the stepped portion 21 is displaced from the locking hole 17 and the locking hole 17 is opened. Therefore, when the plus bit 1 is removed, the steel ball 26 is detached from the locking groove 2 and accommodated in the locking hole 17. Therefore, the plus bit 1 is removed from the insertion hole 13.

  As shown in FIG. 4, the connecting member 30 has a substantially cylindrical shape with the rear end side opened and the front end side closed, and the connecting hole 31 into which the front end side of the detachable body 12 is screwed is directed from the rear end side in the axial direction. Is formed. The connecting hole 31 is formed with a connecting female screw portion 32 corresponding to the main body male screw portion 16 of the detachable main body portion 12. The connecting member 30 is formed with an annular front end side flange portion 33 and a rear end side flange portion 34 on the rear end side and on the outer peripheral surface of the intermediate portion between the front end side and the rear end side, respectively. . The connecting member 30 has a connecting male screw portion 35 formed on the outer peripheral surface on the distal end side.

  As shown in FIG. 1, the blade portion 27 is a disk-shaped cutter with the insertion hole 13 as the center, and is formed of, for example, diamond particles with a special coating. The blade portion 27 is passed through the connection male screw portion 35 of the connection member 30 and is brought into contact with the front end side flange portion 33. In this state, the attachment nut 36 is attached to the connecting male screw portion 35 and tightened, whereby the blade portion 27 is sandwiched and fixed between the attachment nut 36 and the distal end side flange portion 33.

  In addition, the blade part 27 is not restricted to a disk shape, For example, a hole saw etc. may be sufficient. In this case, the electric drill tip tool 10 may be configured by directly attaching a hole saw or the like to the main body male screw portion 16 of the detachable main body portion 12 without using the connecting member 30.

  As shown in FIG. 1, the guide member 40 is used for the power drill tip tool 10. In the guide member 40, an annular guide flange portion 42 that protrudes in a direction orthogonal to the plus bit 1 is formed at the distal end edge of the cylindrical guide main body portion 41. The guide main body 41 is attached by being penetrated by the plus bit 1 and fixed to the plus bit 1.

  As described above, the power drill tip tool 10 is configured. Next, the effect of the power drill tip tool 10 will be described.

  As described above, the power drill tip tool 10 is attached to and detached from the plus bit 1. That is, as shown in FIG. 1, since the power drill tip tool 10 is directly attached to the plus bit 1, there is no need to replace the power drill tip tool 10 from the plus bit 1. Therefore, for example, after attaching the plus bit 1 to the chuck of an electric drill (not shown) and hitting a screw on a wall or the like, the tip tool 10 for the electric drill is attached to the plus bit 1 without removing the plus bit 1 The cutting member can be cut. When hitting a screw again, the power drill tip tool 10 may be removed from the plus bit 1. Therefore, work can be efficiently performed. In particular, when combined with a rechargeable electric drill, the work can be further efficiently performed.

  As shown in FIGS. 2 and 3, when an external force is applied to the slide collar 20 against the restoring force of the coil spring 25, the power drill tip tool 10 compresses the coil spring 25, and slide collar 20 moves toward the rear end side with respect to the detachable main body 12. In the state where the slide collar 20 is disposed on the rear end side, the stepped portion 21 is displaced from the locking hole 17 of the detachable body portion 12 and the locking hole 17 is opened, so that the plus bit 1 is inserted into the insertion hole 13. Then, the steel ball 26 is pushed by the plus bit 1, and the steel ball 26 is received in the locking hole 17. Therefore, the plus bit 1 is inserted into the insertion hole 13 without being caught by the steel ball 26.

  On the other hand, when the slide collar 20 is released from the external force, the slide collar 20 moves toward the distal end side with respect to the detachable main body 12 by the restoring force of the coil spring 25. When the slide collar 20 is disposed on the distal end side, the locking hole 17 is closed by the stepped portion 21 and the steel ball 26 projects to the insertion hole 13 side. Accordingly, the steel ball 26 is locked in the locking groove 2 of the plus bit 1 in the insertion hole 13, and the plus bit 1 is not removed from the insertion hole 13.

  Thus, the power drill tip tool 10 is attached to and detached from the plus bit 1 by moving the slide collar 20 relative to the attachment / detachment main body 12. Therefore, the power drill tip tool 10 can be easily attached and detached, and the work can be efficiently performed.

  The power drill tip tool 10 is a disk-shaped cutter in which the blade portion 27 is centered on the insertion hole 13. Therefore, as shown in FIG. 5, for example, when trying to cut the pipe 3 from the outside, such as the pipe 3 as a member to be cut embedded in the floor 4 with the tip 3 a raised from the floor 4. When there is a possibility that the floor 4 may be damaged, the pipe part 3 can be cut to a desired length without damaging the floor 4 by inserting the blade part 27 into the pipe 3 and hitting the blade part 27 on the inside. it can.

  Further, the guide member 40 of the power drill tip tool 10 is formed with an annular guide flange portion 42 projecting in a direction perpendicular to the plus bit 1 at the tip edge of the cylindrical guide body portion 41. The guide main body 41 is attached by being penetrated by the plus bit 1 and fixed to the plus bit 1. Therefore, for example, as shown in FIG. 5, the length from the guide flange portion 42 to the blade portion 27 is adjusted to the length y of the pipe 3 from the distal end portion 3 a to the cutting portion 3 b, and the guide flange portion 42 is By positioning it against the tip 3a, the pipe 3 can be accurately cut by a desired cutting portion 3b. If a memory or the like is attached to the plus bit 1, the cutting position can be easily adjusted by determining the position of the guide member 40 along the memory.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment. The present invention can be modified in various ways without departing from the matters described in the claims of the utility model registration.

1 Plus bit (driver bit)
2 Locking groove 3 Pipe (member to be cut)
3a tip 3b cutting part 4 floor 10 tip tool for electric drill 11 attaching / detaching part 12 attaching / detaching body part 13 insertion hole 14 enlarged diameter part 15 edge groove 16 body male thread part 17 locking hole 20 slide collar (moving member)
21 Step 25 Coil spring (biasing member)
26 Steel ball (locking member)
27 Blade part 30 Connection member 31 Connection hole 32 Connection female screw part 33 Front end side flange part 34 Rear end side flange part 35 Connection male screw part 36 Mounting nut 40 Guide member 41 Guide body part 42 Guide flange part y Length

Claims (5)

An attachment / detachment portion attached to / detached from a screwdriver bit having a shape corresponding to the tool hole in the screw head,
A blade portion provided on a tip side opposite to a side on which the driver bit is attached and detached in the attaching / detaching portion;
A tip tool for an electric drill characterized by that. The detachable part is
An insertion hole into which the driver bit is inserted, and a detachable main body portion having a locking hole penetrating in a direction perpendicular to the insertion hole as an axis,
A locking member disposed in the locking hole;
A moving member that is disposed around the detachable main body with the insertion hole as an axis, and moves in an axial direction with respect to the detachable main body;
An urging member that urges the moving member toward the distal end side,
Since the moving member is arranged on the tip side, the locking member projects toward the insertion hole and is locked to the driver bit, and the moving member is arranged on the side opposite to the tip side. In the state, the locking member is accommodated in the locking hole and detached from the driver bit.
The tip tool for an electric drill according to claim 1. The blade portion has a disk shape centered on the axis of the insertion hole,
A tip tool for an electric drill according to claim 2. A guide member applied to the member to be cut is provided in the driver bit,
The cutting position of the member to be cut is adjusted according to the distance between the guide member and the blade portion.
The tip tool for an electric drill according to any one of claims 1 to 3, wherein: The guide member has a flange portion that is inserted through the driver bit and extends in a direction perpendicular to the driver bit.
The tip tool for an electric drill according to claim 4.

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