JP2007038336A - Adapter for cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently execute drilling work even if frequent replacement of a cutter and a center drill is required according to the material and the hole size of a drilling object by allowing quick and easy attaching/detaching of the cutter and the center drill to/from the chuck of an electric drill. <P>SOLUTION: This adapter 7 for the cutter for individually attaching the center drill 11 and a core body 10 to a connecting member 9 to be connected to an electric drill, is provided with retaining parts A13, B13 and C13 having insertion holes A for inserting insertion parts A15, B15 and C15 provided in the connecting member 9, the center drill 11 and the core body 10, locking hard balls A20, B20 and C20 locking the movement in the pull-out direction of the respective insertion parts A15 inserted into the respective insertion holes, and locking release parts A29, B29 and C29 releasing the locking to the insertion parts A15 by moving them in the axial direction of the adapter body 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an adapter for a cutter that can attach and detach a connecting member (shank), a punch for drilling, and a center drill, for example, which are attached to a rotation drive unit of a portable electric drill.

Conventionally, as shown in FIG. 7, for example, an arbor 1 is attached to a drilling device (not shown) such as an electric drill or a drilling machine, and the cutter (core drill) 2 is provided on the attached arbor 1. There is a shank attachment structure 4 in which the attached shank 3 can be easily attached and detached (see, for example, Patent Document 1). According to this shank attachment structure 4, the shank 3 can be attached to the arbor 1 simply by inserting the shank 3 of the cutter 2 from below into the opening 1 a formed in the lower part of the arbor 1. The arbor 1 and the shank 3 are attached by a locking mechanism 5 provided on both.
WO98-37999

  However, in the conventional shank mounting structure 4 shown in FIG. 7, for example, when the center pin 6 is damaged and the damaged center pin 6 is replaced, the operator operates the locking mechanism 5 to start with the shank. The (cutter 2) 3 is removed from the arbor 1, and the center pin 6 is lifted upward from the inner hole 2a of the removed cutter 2 and removed. Then, it is necessary to attach another center pin to be replaced to the inner hole 2 a of the cutter 2 and attach the cutter 2 to which the center pin is attached to the opening 1 a of the arbor 1. That is, in order to remove the center pin 6 from the arbor 1, the cutter 2 that does not need to be removed must be removed from the arbor 1, and another center pin is attached to the cutter 2, and the cutter 2 with the center pin attached thereto. Needs to be attached to the arbor 1, which is very laborious and time consuming.

  Similarly, when exchanging the cutter 2 in order to open a hole having a different size, for example, the operator operates the locking mechanism 5 to first remove the cutter 2 from the arbor 1 and remove the removed cutter 2. Remove the center pin 6 from. Then, it is necessary to attach the original center pin 6 to another cutter to be replaced. That is, in order to remove the cutter 2 from the arbor 1, the center pin 6 that does not need to be removed must be removed from the arbor 1. The center pin 6 is attached to another cutter, and the center pin 6 is attached to the cutter. Needs to be attached to the arbor 1, which is very laborious and time consuming.

  For example, when a large number of holes of different sizes are to be drilled on walls or members (objects to be drilled) of different materials such as concrete, wood or metal at construction sites or civil engineering sites, etc. Since it is necessary to frequently replace the cutter and the center drill according to the hole diameter, it takes a lot of labor and time, which is a burden on the operator.

  The present invention has been made in order to solve the above-described problems. The cutter and the center drill can be separately and quickly attached to and detached from, for example, a chuck of an electric drill to An object of the present invention is to provide an adapter for a cutter that enables efficient drilling even when it is necessary to frequently replace the cutter and the center drill according to the material and the hole diameter.

  The present invention provides an adapter for a cutter for separately attaching a punching cutter and a center drill to a connecting member connected to a rotation drive unit, the adapter main body to which the connecting member is attached, Corresponding to the insertion part provided in each of the connecting member, the cutter and the center drill, the adapter body is provided with a holding part having an insertion hole into which the insertion part is inserted, and the respective holding part. A locking portion for locking the movement of each insertion portion inserted in the insertion hole in the pull-out direction, and provided on the adapter body corresponding to each locking portion. Each of the insertion holes is formed in a cross section for transmitting torque to the insertion portion. The one in which the features.

  When attaching the cutter and the center drill to the rotation drive unit using the cutter adapter according to the present invention, for example, first, the insertion portion provided in each of the connecting member, the cutter and the center drill is changed to the adapter main body. It inserts in each corresponding insertion hole provided in. The connecting member, the cutter, and the center drill can be attached to the adapter in a desired order. Then, the connecting member is attached to the chuck of the electric drill. In this way, the adapter to which the core body and the center drill are attached can be attached to the chuck of the electric drill, for example, via the connecting member, and the core body and center drill attached to the adapter can be attached to the adapter. Can be used for drilling operations. And when removing a desired thing among the cutter and center drill attached to the adapter main body, it is only necessary to operate the unlocking portion corresponding to the one to be removed, thereby the cutter and the center drill. Can be removed from the adapter body. Moreover, the adapter main body can be removed from the connecting member by operating a predetermined unlocking portion. Moreover, since each insertion hole is formed in the cross section for the torque transmission with respect to an insertion part, both can transmit a torque (rotation) mutually.

  According to the cutter and the center drill, the center hole can be formed in advance with the center drill, and the center of the hole can be positioned. The cutter can form a large-diameter hole concentric with the center drill.

  And in the adapter for cutters according to this invention, the cutter constitutes a core drill, and a connecting member holding portion into which the inserting portion of the connecting member is inserted is formed at one end of the adapter body, and the inserting portion of the cutter It is preferable that a cutter holding portion into which the is inserted is formed at the other end of the adapter body, and a center drill holding portion is provided at the center of the cutter holding portion or in the vicinity thereof. In this way, the configuration for attaching the connecting member, the cutter, and the center drill so that the centers thereof coincide with each other on the same axis becomes simple, and the cutter adapter can be manufactured at a relatively low cost. it can.

  Further, in the adapter for a cutter according to the present invention, in a state where the insertion portion of the connection member is inserted into the corresponding insertion hole and attached, the hook-shaped portion provided on the connection member contacts the adapter body, With the insertion portion of the center drill inserted into the corresponding insertion hole and attached, the distal end of the insertion portion of the center drill comes into contact with the distal end of the insertion portion of the connecting member, and the insertion portion of the cutter corresponds to the insertion portion. The shoulder formed on the cutter may be in contact with the adapter main body in the state of being inserted into the insertion hole and attached. In this way, the connecting member, the cutter, and the center drill are attached to the adapter main body, and the end portions in the axial direction or the end portion and the hook-shaped portion are in contact with each other. By increasing the diameter, the cutter, center drill, connecting member and adapter main body can sufficiently receive the impact and resistance in the axial direction received from the drilling object and the electric drill during drilling work. Can do. Further, since it is possible to prevent the impact and resistance in the axial direction from being applied to the locking portion and the locking release portion, it is not necessary to increase the rigidity of the locking portion and to prevent the failure thereof.

  Furthermore, in the adapter for a cutter according to the present invention, each of the locking portions is movable to a protruding position that protrudes inward from the inner surface of the holding portion and a retracted position that retreats outward from the inner position, A lock provided on the adapter body corresponding to each locking portion and movable between a standby position for holding the locking portion in the retracted position and a push-in position allowing the locking portion to move to the protruding position. A stop urging member, a standby urging member that urges each of the locking operation portions to a standby position, and the adapter main body corresponding to each of the locking portions, wherein the locking portion is in a protruding position. A latch release portion that can be moved to a lock position that is held by the lock and a lock release position that enables the lock portion to move to a retracted position, and the respective lock release portions are biased to the lock position. It is good to provide a biasing member for locking

  In this case, first, in a non-attached state in which an insertion portion such as a cutter is not inserted (attached) into the insertion hole of the holding portion, the standby biasing member biases the locking operation portion and this engagement. The stop operating part is moved to the standby position. Since the latching operation portion in the standby position holds the latching portion in the retracted position, the insertion portion such as a cutter can be inserted (attached) into the insertion hole of the holding portion. Next, when the insertion portion is inserted into the insertion hole in this attachable state, the insertion operation portion can push the locking operation portion at the standby position and move it to the pushing position. As a result, the locking portion in the retracted position is moved to the protruding position by the locking releasing portion and the locking biasing member, and the locking portion that has become the protruding position is formed in the insertion portion. Engage with stop groove. When the locking portion engages with the locking groove, the movement of the insertion portion in the pulling-out direction can be locked, and an attachment state is obtained.

  Next, when the insertion portion in the attached state is removed from the insertion hole, the operator moves the locking release portion against the biasing force of the locking biasing member, for example, in the axial direction of the adapter body. At this time, the urging force of the standby urging member causes the locking operation portion to move the insertion portion in the pulling direction, and the locking portion that engages with the locking groove moves away from the locking groove and moves to the retracted position. Furthermore, the latching operation part in the pushing position moves to the standby position, and the latching operation part can hold the latching part in the retracted position. This returns to the insertable non-attached state.

  And in the adapter for cutters concerning this invention, the biasing member for waiting for energizing each latching operation part for the above-mentioned connecting member and the above-mentioned center drill is shared, and the above-mentioned for connecting member and the above-mentioned center drill It is preferable to share a latching biasing member for biasing the latching release portion. If it does in this way, only one energizing member for waiting for energizing the locking operation part provided with respect to the connecting member and the center drill is sufficient, and the number of parts as a whole can be reduced. . Therefore, the material cost, the processing cost, and the assembly cost can be reduced. Furthermore, since the bulk of the adapter for the cutter can be reduced, it is convenient to carry and can be easily drilled.

  In the adapter for a cutter according to the present invention, each of the locking portions is a sphere, and each of the standby biasing member and the locking biasing member is a compression coil spring, and each of the standby biasing members. A stopper for stopping the movement of the locking operation portion by the urging member at the standby position may be provided in each of the insertion holes or the locking operation portion.

  As described above, when the locking portion is a sphere, it is not necessary to regulate the posture (directionality) of the locking portion when the locking portion moves between the retracted position and the protruding position, which may make it difficult to break down. it can. If the standby biasing member and the locking biasing member are compression coil springs, a power source is unnecessary and the structure is simple. Further, by providing a stopper for stopping the movement of the locking operation portion at the standby position, the locking operation portion can reliably hold the locking portion at the retracted position. As a result, each insertion part provided in the connecting member, the cutter, and the center drill can be easily inserted and attached to the corresponding insertion hole without being obstructed by the locking part.

  According to the cutter adapter according to the present invention, it is possible to attach the connecting member, the cutter, and the center drill to the adapter main body separately and extremely quickly and easily, and the corresponding unlocking portions are provided. By being operated, a desired connecting member, cutter or center drill can be removed (separated) from the adapter main body individually and very quickly and easily. Therefore, even when it is necessary to frequently replace the cutter and the center drill according to the material and hole diameter of the drilling object, the drilling operation can be performed efficiently because it can be replaced very quickly and easily.

  In addition, for example, when the structure for attaching the connecting member to the rotation drive unit is different for each rotation drive unit, each of the connection members can be connected to the corresponding rotation drive unit. While forming one end, it forms so that the insertion part of the other end of each of these connection members can be attached to a common adapter. Thereby, the common adapter main body to which the cutter and the center drill are attached can be attached and detached very quickly and easily via the connecting member that can be used for the rotation drive unit to be used. This also makes it possible to perform the drilling work efficiently.

  Hereinafter, an embodiment of an adapter for a cutter according to the present invention (hereinafter sometimes simply referred to as “adapter”) will be described with reference to FIGS. As shown in FIG. 1, the cutter adapter 7 can be attached with a core drill 8 or the like, and the adapter 7 to which the core drill 8 is attached is connected to, for example, an electric drill (impact electric drill or the like) via a connecting member 9. And can be used by attaching to a chuck or the like of a rotation drive unit including FIG. 1 is a half cross-sectional view showing a state in which the connecting member 9 and the core drill 8 are attached to the cutter adapter 7. The core drill 8 includes a punch for drilling (core main body 10) and a center drill 11. The core main body 10 and the center drill 11 are separately attached to the adapter 7. The connecting member 9 is detachably attached to the adapter 7 is a connecting member attaching structure A, and the center drill 11 is detachably attached to the adapter 7 is a center drill attaching structure B. A core body attachment structure C is a structure in which the main body 10 is detachably attached to the adapter 7.

  As shown in FIG. 1, the connecting member mounting structure A is provided at the right end of the adapter body 12 having a substantially short cylindrical shape. A short cylindrical right end portion of the adapter body 12 is a connecting member holding portion (hereinafter, also simply referred to as “holding portion”) A13. An insertion hole A14 is formed in the holding portion A13, and the insertion hole A14 is formed in a shape into which the insertion portion A15 formed at one end of the connecting member 9 is inserted. As shown in FIG. 3, for example, three key-shaped convex portions A16 are formed on the inner peripheral surface of the holding portion A13 that forms the insertion hole A14. Each of the three key-shaped convex portions A16 has a rectangular cross-sectional shape, and is provided at each of three positions obtained by dividing the inner peripheral surface of the insertion hole A14 into three equal parts in the circumferential direction.

  As shown in FIG. 3, the connecting member 9 has an insertion portion A15 formed at the left end portion and a shank 17 formed at the right end portion. A hook-shaped portion A18 is formed between the insertion portion A15 and the shank 17. The insertion portion A15 has a substantially short cylindrical shape, and an annular locking groove A19 is formed on the outer peripheral surface of the center portion. The locking groove A19 is substantially semicircular in cross section, and the insertion portion A15 inserted (attached) into the insertion hole A14 is engaged with a locking portion (locking hard ball A20) described later. This prevents it from coming out of the insertion hole A14. Further, three key grooves A21 are formed on the outer peripheral surface of the insertion portion A15 along the axial direction. The three key grooves A21 are fitted with the three key-like convex portions A16 when the insertion portion A15 is inserted into the insertion hole A14, so that torque can be transmitted without rattling between the two. Is formed. In this embodiment, each keyway A21 is formed in a rectangular cross section corresponding to each key-like convex portion A16.

  The hook-shaped portion A18 is formed in a substantially disk shape as shown in FIG. 3, and the leading edge of the holding portion A13 is inserted in the state where the insertion portion A15 is inserted into the insertion hole A14 as shown in FIG. The locking groove A19 can be positioned so as to face a locking hard ball A20 described later. Furthermore, vibrations and impacts from the core body 10 and the electric drill can be transmitted between the adapter body 12 and the connecting member 9 by the hook-shaped portion A18. Further, as shown in FIG. 1, an abutting portion A22 is formed at the center of the distal end surface of the insertion portion A15. The abutting portion A22 comes into contact with the right end portion of the center drill 11 in a state where the connecting member 9 and the center drill 11 are mounted on the adapter 7. By this contact, vibrations and impacts from the center drill 11 and the electric drill can be transmitted between the connecting member 9 and the center drill 11.

  The shank 17 is a rod-shaped body, and the base end portion 23 is formed as a columnar portion having a hexagonal cross section. The base end portion 23 is a state in which the shank 17 is attached to a chuck (not shown) of an electric drill, and there is no backlash between the base end portion 23 and the chuck (not shown), and torque is transmitted. It is formed to be able to. An annular locking groove 24 is formed on the outer peripheral surface of the central portion of the shank 17. The locking groove 24 has a substantially semicircular cross-sectional shape. For example, when the locking hard ball provided on an arbor (not shown) mounted on the rotating portion of the electric drill is engaged, the shank 17 is This is to prevent you from getting out of this arbor. The base end portion 23 having a hexagonal cross section formed on the shank 17 is formed so as to be fitted into a holding hole having a hexagonal cross section formed on the arbor, so that there is no backlash between the two. , Formed so that torque can be transmitted.

  Moreover, as shown in FIG. 3, the latching operation part A25 is arrange | positioned inside the holding part A13 for connection members (insertion hole A14). The locking operation portion A25 is an annular ring, is movable in the direction of the hole in the insertion hole A14, and is held at the standby position. And the latching | locking action | operation part A25 is holding the latching hard ball A20 in a retracted position, when it exists in a standby position. Further, a standby biasing member (compression coil spring) A26 is disposed inside the holding portion A13 (insertion hole A14), and the standby biasing member A26 is locked at the right end of the drawing. In contact with the operating portion A25, the locking operating portion A25 is urged toward the opening portion side of the holding portion (insertion hole A14) A13. Further, a locking pin A27 protrudes from the inner surface of each of the three key-shaped convex portions A16 provided on the inner surface of the holding portion A13. When each of the locking pins A27 moves toward the opening side of the holding portion A13 when the locking operation portion A25 is biased by the standby biasing member A26, the locking operation portion A25 is moved to the standby position (FIG. (State shown in FIG. 3).

  The locking hard ball (locking portion) A20 is disposed in the locking hole A28 as shown in FIG. The locking holes A28 are circular holes, and three, for example, are formed in the connecting member holding portion A13. The three locking holes A28 are provided at three positions obtained by dividing the holding portion A13 into three equal parts in the circumferential direction, and one locking hard ball A20 is disposed in each locking hole A28.

  As shown in FIG. 1, the locking hard ball A20 is movable to a protruding position that protrudes inward from the inner surface of the holding portion A13 and a retracted position that retreats outward as shown in FIG. is there. In addition, the inner side opening part of each latching hole A28 is formed in the dimension a little smaller than the latching hard ball A20 so that the latching hard ball A20 may not detach | leave from the latching hole A28 inside.

  And, as shown in FIG. 3, when the latching operation part A25 is at the standby position, it is positioned at a position corresponding to each latching hole A28, so that the latching hard ball A20 is held at the retracted position. Can do. And as shown in FIG. 1, when the latching operation part A25 exists in a pushing position, the latching hard ball A20 moves to a protrusion position. The locking hard ball A20 engages with a locking groove A19 provided in the insertion portion A15 of the connecting member 9 when in the protruding position. Further, when the locking operation portion A25 is in the pushing position, as shown in FIG. 1, the abutting portion A22 is inserted into the through hole A25a of the locking operation portion A25, and the abutting portion A22 is connected to the adapter. 7 is configured to come into contact with the end portion of the insertion portion B15 of the center drill 11 attached to 7.

  Moreover, as shown in FIG. 1, the latch release part A29 is mounted | worn with the outer peripheral surface of holding | maintenance part A13 for connection members. The lock release portion A29 has a short cylindrical shape, and an annular protrusion A29a is formed on the inner peripheral surface, and is movable in the axial direction of the holding portion A13. The lock release portion A29 shown in FIG. 1 is held at the lock position. When the locking release portion A29 is in the locking position, the protrusion A29a abuts on the locking hard ball A20 and holds the locking hard ball A20 in the locking position. A latching biasing member (compression coil spring) A30 is disposed between the inner peripheral surface of the latch release portion A29 and the outer peripheral surface of the holding portion A13, and this latching biasing member. In A30, the right end portion of the figure is in contact with the protrusion A29a, and this locking release portion A29 is urged toward the opening side of the holding portion A13. Further, when the unlocking portion A29 is biased by the latching biasing member A30 and moves toward the opening side of the holding portion A13, the unlocking portion A29 is brought into contact with the shaft retaining ring A31. It contacts and is positioned at the locking position. The shaft retaining ring A31 is detachably mounted on the outer peripheral surface of the opening edge of the holding portion A13.

  As shown in FIG. 1, when the locking release portion A29 is in the locking position, the protrusion A29a is positioned at a position corresponding to each locking hard ball A20, so that the locking hard ball A20 protrudes. Each locking hard ball A20 is engaged with the locking groove A19. This state is an attachment state in which the insertion portion A15 of the connecting member 9 is attached to the insertion hole A14 of the connecting member holding portion A13, and the connecting member 9 does not come out of the holding portion A13, and is not attached to the holding portion A13. Thus, the torque can be transmitted without rotating around the shaft.

  Also, as shown in FIG. 3, when the operator slides the lock release portion A29 to move it to the lock release position, the end of the connection member lock release portion A29 will be described later for the center drill lock release. Abutting on the end of the part B29, the movement in the same direction is stopped. When the lock release portion A29 is in the lock release position, the lock hard ball A20 in the protruding position can be moved to the retracted position, and the lock operation portion A25 in the push-in position shown in FIG. It is energized by A26 and moves to the standby position shown in FIG. When the locking operation portion A25 moves to the standby position, the locking hard ball A20 at the protruding position shown in FIG. 1 can be moved to the retracted position shown in FIG. At this time, since the locking hard ball A20 is released from the locking groove A19 and the locking is released, as shown in FIG. 3, the connecting member 9 attached to the holding portion A13 is the standby biasing member A26. Due to the urging force, it moves in a direction away from the holding portion A13 and becomes detached. As described above, when the locking release portion A29 moves to the locking release position and the locking hard ball A20 is held at the retracted position, a part of the locking hard ball A20 is moved outward from the outer peripheral surface of the holding portion A13. The protrusion A29a engages with the protruding portion, and the unlocking portion A29 is locked from moving toward the opening of the holding portion A13.

  Next, as shown in FIG. 3, when the connecting member 9 is attached in a non-attached state where the connecting member 9 is not attached to the connecting member holding portion A13, the insertion portion A15 of the connecting member 9 is Then, it may be inserted into the insertion hole A14 of the holding portion A13 against the biasing force of the standby biasing member A26. At this time, the locking operation part A25 having the distal end of the insertion part A15 in the standby position can be pushed forward toward the back side of the insertion hole A14 and moved to the pushing position shown in FIG. As shown in FIG. 3, when the insertion portion A15 and the locking operation portion A25 are moved to the pushing position, the locking hard ball A20 at the retracted position is automatically moved to the protruding position, and the locking groove of the insertion portion A15 is automatically moved. Engage with A19 and the unlocking portion A29 in the unlocking position moves to the locking position. Thereby, it will be in the attachment state which can attach the connection member 9 to holding | maintenance part A13 for connection members.

  Next, the center drill attachment structure B will be described with reference to FIGS. As shown in FIG. 1, the center drill attachment structure B includes a center drill holding portion (hereinafter, also simply referred to as “holding portion”) B <b> 13. The center drill holding portion B13 includes an inner cylinder portion B13a provided at the center of the left end portion of the adapter body 12 having a substantially short cylindrical shape, and an adapter main body 12 coupled to the right end portion of the inner cylinder portion B13a. And a central portion B13b. The inner diameter of the center portion B13b of the adapter body 12 is formed larger than the inner dimension of the inner cylinder portion B13a. An insertion hole B14 is formed in the holding part (central part B13b and inner cylinder part B13a) B13, and this insertion hole B14 is formed in a shape into which the insertion part B15 formed at one end of the center drill 11 is inserted. Has been. And as shown in FIG. 2, the cross-sectional shape is formed in the internal peripheral surface of inner cylinder part B13a which forms this insertion hole B14 in the hexagon.

  As shown in FIG. 2, the center drill 11 has an insertion portion B15 formed at the right end portion and a cutting edge portion 32 formed at the left end portion. The insertion portion B15 is a columnar body having a hexagonal cross section, and an annular locking groove B19 is formed on the outer peripheral surface of the center portion. The locking groove B19 has a substantially semicircular cross-sectional shape. When a locking portion (locking hard ball B20), which will be described later, is engaged, the insertion portion B15 inserted into the insertion hole B14 is removed from the insertion hole B14. It is to prevent it from coming out. The hexagonal column insertion portion B15 is formed such that when inserted into the hexagonal hole insertion hole B14, there is no backlash between the two and torque can be transmitted.

  Further, as shown in FIG. 1, with the center drill 11 and the connecting member 9 attached to the adapter 7, the right end surface of the insertion portion B <b> 15 of the center drill 11 and the abutting provided on the connecting member 9. The portion A22 comes into contact with the contact portion, and vibrations and impacts from the center drill 11 and the electric drill can be transmitted between the connecting member 9 and the center drill 11 by this contact.

  Moreover, as shown in FIG. 2, the latching operation part B25 is arrange | positioned inside the center part B13b (insertion hole B14) of the holding part B13 for center drills. The locking operation part B25 is a short cylindrical body, is movable in the direction of the hole in the insertion hole B14, and is held at the standby position. And the latching operation part B25 is holding the latching hard ball B20 in a retracted position, when it exists in a standby position. Further, a standby biasing member (compression coil spring) A26 is disposed inside the holding portion B13 (insertion hole B14), and the standby biasing member A26 is locked at the left end of the drawing. Abutting on a ridge B25b provided on the outer peripheral surface of the operating part B25, the locking operating part B25 is urged toward the inner cylinder part (insertion hole B14) B13a. The standby biasing member A26 of the center drill 11 is a standby biasing member of the connecting member 9, and is shared. Further, the protrusion B25b provided on the outer peripheral surface of the latching operation portion B25 has the latching operation portion B25 biased by the standby biasing member A26, and the inner cylinder portion B13a (holding portion B13) side direction. When moving to the position, the engaging operation part B25 can be positioned at the standby position by engaging the engaging hard ball B20 at the protruding position (see FIG. 2).

  The locking hard ball (locking portion) B20 is disposed in the locking hole B28, as shown in FIG. The locking hard ball B20 and the locking hole B28 have the same configuration as the locking hard ball A20 and the locking hole A28 constituting the connecting member holding portion A13, and are located inside the inner surface of the central portion B13b of the holding portion B13. As shown in FIG. 2, it can move freely to a protruding position where it protrudes and to a retracted position where it retracts to the outside.

  Then, as shown in FIG. 2, the locking operation unit B25 can be engaged with each locking hard ball B20 and hold each locking hard ball B20 in the retracted position when in the standby position. And as shown in FIG. 1, when the latching operation part B25 exists in a pushing position, the latching hard ball B20 moves to a protrusion position. The locking hard ball B20 engages with a locking groove B19 provided in the insertion portion B15 of the center drill 11 when in the protruding position. Further, when the locking operation part B25 is in the pushing position, as shown in FIG. 1, the abutment part A22 is inserted through the through holes A25a and B25a formed in the respective locking operation parts A25 and B25. The abutting portion A22 comes into contact with the end portion of the insertion portion B15 of the center drill 11. Further, the insertion portion B15 of the center drill 11 is inserted into the insertion hole B14, and the locking operation portion B25 can be moved toward the back side at the distal end of the insertion portion B15. A bent portion B25c is formed.

  Moreover, as shown in FIG. 1, the latch release part B29 is mounted | worn with the outer peripheral surface of center part B13b of holding | maintenance part B13. The locking release portion B29 has a short cylindrical shape, and an annular protrusion B29a is formed on the inner peripheral surface, and is movable in the axial direction of the holding portion B13. The locking release part B29 shown in FIG. 1 is held at the locking position, and the protrusion B29a abuts on the locking hard ball B20 to hold the locking hard ball B20 at the locking position. And between the inner peripheral surface of this latch release part B29 and the outer peripheral surface of center part B13b, the latching biasing member A30 is arrange | positioned, This latching biasing member A30 is the same figure. The left end portion of the contact portion abuts on the ridge B29a, and this locking release portion B29 is urged toward the inner cylinder portion B13a. The latching biasing member A30 of the center drill 11 is a latching biasing member of the connecting member 9, and is shared.

  Further, as shown in FIG. 1, the core body holding portion C13 formed at the left opening end of the adapter body 12 is formed to have a larger diameter than the center portion B13b, and the core body holding portion C13 and the center portion B13b are formed. A step B33 is formed at the boundary. The step B33 comes into contact with the lock release portion B29 when the lock release portion B29 is urged by the lock biasing member A30 and moves in the direction of the step B33, and the lock release portion B29 is released. The part B29 can be positioned at the locking position.

  As shown in FIG. 1, when the locking release portion B29 is in the locking position, the protrusion B29a can hold each locking hard ball B20 in the protruding position, and each locking hard ball B20 is engaged. It engages with the stop groove B19. This state is an attachment state in which the insertion portion B15 of the center drill 11 is attached to the insertion hole B14 of the holding portion B13 for center drill, and the center drill 11 does not come out of the holding portion B13 and Thus, the torque can be transmitted without rotating around the shaft.

  Further, as shown in FIG. 2, when the operator slides the locking release portion B29 and moves it to the locking release position, the end of the center drill locking release portion B29 is connected to the coupling member lock release portion B29. The movement in the same direction is stopped. When the lock release portion B29 is in this lock release position, the lock hard ball B20 in the protruding position can be moved to the retracted position, and the lock operation portion B25 in the push-in position shown in FIG. The member A26 is urged to move to the standby position shown in FIG. By moving the locking operation portion B25 to the standby position, the locking hard ball B20 at the protruding position shown in FIG. 1 can be moved to the retracted position shown in FIG. At this time, since the locking hard ball B20 is released from the locking groove B19 and the locking is released, as shown in FIG. 2, the center drill 11 attached to the holding portion B13 is placed on the standby biasing member A26. Due to the urging force, it moves in a direction away from the holding portion B13 and becomes detached. As described above, when the locking release portion B29 moves to the locking release position and the locking hard ball B20 is held at the retracted position, a part of the locking hard ball B20 is moved outward from the outer peripheral surface of the holding portion B13. The protruding portion B29a engages with the protruding portion, and the unlocking portion B29 is locked from moving in the direction of the stepped portion B33, and is brought into a non-attached state.

  Next, as shown in FIG. 2, when the center drill 11 is attached to the holding portion B13 in the non-attached state where the center drill 11 is not attached to the center drill holding portion B13, the connecting member 9 is attached. Since it is equivalent when attaching to holding part B13, detailed description is abbreviate | omitted.

  Next, the core body attachment structure C will be described with reference to FIGS. As shown in FIG. 1, the core body attachment structure C includes a core body holding portion (hereinafter, also simply referred to as “holding portion”) C13. The core main body holding portion C13 is provided at the left end of the substantially short cylindrical adapter main body 12. An insertion hole C14 is formed in the holding portion C13, and the insertion hole C14 is one end of the core main body 10. It is formed in a short cylindrical shape into which the insertion portion C15 formed in is inserted.

  As shown in FIG. 2, the core body 10 has a substantially short cylindrical core portion 10a, and a plurality of cutting blades 10b are formed at one opening edge of the core portion 10a. An annular shoulder member C10c having an outer diameter substantially the same as that of the core portion 10a is welded to the other opening end. The insertion portion C15 is screwed into the inner hole of the shoulder member C10c. The shoulder member C10c of the core body 10 has a function equivalent to that of the flange portion A18 of the connecting member 9 shown in FIG. That is, as shown in FIG. 1, with the insertion portion C15 inserted into the insertion hole C14 and attached, the end surface of the shoulder member C10c comes into contact with the distal end portion of the core body holding portion C13, and the locking groove C19. Can be positioned so as to face a locking hard ball C20, which will be described later, and vibrations and impacts from the core body 10 and the electric drill are transmitted between the adapter body 12 and the connecting member 9 by the shoulder member C10c. You can make it.

  As shown in FIG. 1, one end of the standby biasing member C26 engages with the inner edge portion of the locking operation portion C25, and the other end contacts the bottom portion (adapter body 12) C14a of the insertion hole C14. Yes. The bottom portion C14a is formed in an annular shape between the core body holding portion C13 and the inner cylinder portion B13a.

  Further, as shown in FIG. 1, the latching biasing member C30 has one end engaged with a protrusion C29a formed on the inner peripheral surface of the latch release part C29 and the other end of the outer periphery of the holding part C13. The shaft abuts against a retaining ring C31 that is detachably mounted on the surface.

  Furthermore, as shown in FIG. 1, a protrusion C34 is formed on the outer peripheral surface of the leading end opening edge of the holding portion C13. The protrusion C34 comes into contact with the end of the unlocking portion C29 when the unlocking portion C29 is urged by the locking biasing member C30 and moves in the locking position direction. The release part C29 can be positioned at the locking position.

  Other than this, the holding portion C13, the insertion hole C14, the insertion portion C15, the locking operation portion C25, the standby biasing member C26, the locking hard ball C20, the locking hole C28, the locking of the core body attachment structure C The configurations of the release portion C29, the latching biasing member C30, and the like are the same as the corresponding ones of the connecting member mounting structure A, and similarly, the core body 10 can be attached to the holding portion C13. It can be removed from the holding part C13. Therefore, equivalent parts are denoted by corresponding drawing symbols, and detailed description thereof is omitted. 4 is a cross-sectional view as seen from the direction EE in FIG.

  Next, when the core body 10 and the center drill 11 are attached to the electric drill using the cutter adapter 7 configured as shown in FIG. 1 or the like, the connecting member 9, the center drill 11 and the core body 10 are attached. Are inserted into the corresponding insertion holes A14, B14, C14 provided in the adapter main body 12, respectively. The connecting member 9, the center drill 11, and the core body 10 can be attached to the adapter 7 in a desired order. Then, the connecting member (shank 17) 9 is attached to the chuck of the electric drill. In this way, the adapter 7 to which the core body 10 and the center drill 11 are attached can be attached to the chuck of the electric drill via the connecting member 9, and the core body attached to the adapter 7. 10 and the center drill 11 can be used for drilling.

  And when removing a desired thing among the center drill 11 and the core main body 10 which are attached to the adapter 7, the latch release parts B29 and C29 corresponding to what is going to be removed are arranged in the axial direction of the adapter 7. What is necessary is just to move, and the desired center drill 11 and the core main body 10 can be removed from the adapter 7 by this. That is, in FIG. 1, the core main body 10 and the center drill 11 are attached to the adapter 7, and when removing the core main body 10 and the center drill 11 from the adapter 7, the operator uses the core main body 10 and the center drill 11. Each of the lock release portions C29 and B29 for use may be moved in the axial direction of the adapter 7 from the lock position shown in FIG. 1 to the lock release position shown in FIG.

  Further, in FIG. 1, the connecting member 9 is attached to the adapter 7, and when the connecting member 9 is removed from the adapter 7, the operator shows an unlocking portion A <b> 29 for the connecting member 9 in FIG. 1. What is necessary is just to move to the latch release position shown in FIG.

  Further, each insertion hole A14, B14, C14 has a cross section for transmitting torque to the insertion portions A15, B15, C15 (for example, a key-like convex portion A16 provided in the insertion portion A15 and an insertion hole A14. The key groove A21, the insertion section B15 having a hexagonal cross section, the insertion hole B14 having a hexagonal cross section, and the like can be transmitted to each other. The rotational force of the drill can be transmitted to the core body 10 and the center drill 11. According to the core body 10 and the center drill 11, the center hole can be formed in advance with the center drill 11, and the center of the hole can be positioned. The core body 10 can form a large-diameter hole concentric with the center drill 11.

  Thus, according to this cutter adapter 7, the connecting member 9, the center drill 11 and the core body 10 can be attached to the adapter 7 very quickly and easily, respectively. By moving the stop release portions A29, B29, and C29 in the axial direction of the adapter 7, the desired connecting member 9, the center drill 11, and the core body 10 are separated (separated) from the adapter 7 very quickly and easily, respectively. be able to. Therefore, as shown in FIG. 5, even when it is necessary to frequently replace the core bodies 10 and 37 and the center drills 11 and 38 according to the material and the hole diameter of the drilling object, they can be replaced very quickly and easily. , Drilling can be performed efficiently. In addition, the core main bodies 37 and 10 are those in which the cutting edges 37a and 10b are super steel chips and those that are not super hard chips. And the center drills 38 and 11 are what the front-end | tip blades 38a and 11b are a super steel chip | tip, and what is not a cemented carbide chip | tip.

  Further, for example, when the structure of the chuck or arbor for attaching the connecting member 9 to the electric drill is different for each electric drill, as shown in FIG. Each shank 17, 41, 42 is formed so that it can be attached to the corresponding electric drill, and the insertion portions A 15, A 15, A 15 at the other end of each connecting member 9, 39, 40 are attached to the common adapter 7. Form so that it can be worn. As a result, the common adapter 7 to which the core body 10 and the center drill 11 are attached can be used very quickly and with a desired connecting member 9, 39 or 40 that can be attached to a chuck or arbor of a desired electric drill. It can be easily attached to and detached from a chuck or the like. This also makes it possible to perform the drilling work efficiently.

  As shown in FIG. 1, in the cutter adapter 7, the connecting member holding portion A <b> 13 is formed at the right end portion of the adapter main body 12, and the center drill holding portion B <b> 13 and the core main body holding portion C <b> 13 are connected to the adapter main body 12. The center drill holding part B13 is formed at the left end and is provided at the center of the core body holding part C13. In this way, the configuration of the adapter 7 for attaching the connecting member 9, the core body 10 and the center drill 11 so that the centers thereof coincide with each other on the same axis becomes simple. It can be manufactured at a relatively low cost.

  Further, as shown in FIG. 1, the cutter adapter 7 has a hook-shaped portion A18 provided on the connecting member 9 in a state where the inserting portion A15 of the connecting member 9 is inserted into the corresponding insertion hole A14 and attached. It contacts the end of the holding portion A13 of the adapter main body 12. Then, with the insertion portion B15 of the center drill 11 inserted into the corresponding insertion hole B14 and attached, the distal end of the insertion portion B15 of the center drill 11 is brought into contact with the distal end of the insertion portion A15 (butting portion A22) of the connecting member 9. Touch. In addition, the shoulder member C10c formed in the core body 10 contacts the end of the holding part C13 of the adapter body 12 in a state where the insertion part C15 of the core body 10 is inserted and attached to the corresponding insertion hole C14. It becomes the composition of.

  If it does in this way, in the state where connecting member 9, core main part 10, and center drill 11 were attached to adapter main part 12, each end in the direction of an axis, and end and bowl part A18 contacted. Therefore, by increasing these rigidity, in the drilling operation, the core body 10, the center drill 11, the connecting member 9, and the adapter body 12 are subjected to the impact and resistance in the axial direction received from the drilling object or the electric drill. Can be received sufficiently, and drilling can be performed efficiently. Further, since the impact and resistance in the axial direction are not applied to the locking hard balls A20, B20, C20, the locking operation parts A25, B25, C25, and the locking release parts A29, B29, C29, etc., their rigidity is increased. There is no need to do so, and those failures can be prevented.

  Further, as shown in FIG. 1, this cutter adapter 7 is shared with a standby biasing member A26 for biasing the locking operation portions A25 and B25 for the connecting member 9 and the center drill 11. The latching biasing member A30 for biasing the locking release portions A29 and B29 for the connecting member 9 and the center drill 11 is shared. In this way, the two latching operation parts A25 and B25 can be biased by one standby biasing member A26, and the two latch release parts A29 and B29 can be biased by one latching biasing member. It can be energized at A30. Therefore, the number of parts as a whole can be reduced, and material costs, processing costs, and assembly costs can be reduced. Furthermore, since the bulk of the cutter adapter 7 can be reduced, it is convenient to carry and can be easily drilled.

  As shown in FIG. 1, each of the locking hard balls A20, B20, C20 is a sphere, and each of the standby biasing members A26, C26 and the locking biasing members A30, C30 are compression coil springs. is there. Then, the locking pins A27, C27 and the protrusions B25b for stopping the movement of the locking operation parts A25, B25, C25 by the standby biasing members A26, C26 at the standby position are respectively inserted into the insertion holes A14, C14 and the locking operation portion B25 are provided.

  As described above, when the locking hard balls A20, B20, and C20 are spheres, it is necessary to regulate the posture (directionality) of the locking hard ball A20 and the like when the locking hard ball A20 and the like move to the retracted position and the protruding position. Because there is no, it can be made difficult to break down. If the standby biasing members A26 and C26 and the locking biasing members A30 and C30 are compression coil springs, a power source is unnecessary and the structure is simple. Further, by providing the locking pins A27, C27 and the protrusions B25b for stopping the movement of the locking operation parts A25, B25, C25 at the standby position, the locking operation parts A25, B25, C25 are locked hard balls. A20, B20, and C20 can be reliably held at the retracted position. In this way, when the locking hard ball A20 and the like can be reliably held in the retracted position, the insertion portions A15, B15, and C15 provided in the connecting member 9, the center drill 11, and the core body 10 are It can be easily inserted and attached to the corresponding insertion holes A14, B14, C14 without being obstructed by each of the locking hard balls A20.

  However, in the said embodiment, as shown in FIG. 1, the structure which shares the energizing member A26 for standby for energizing each latching operation part A25 for the connection member 9 and the center drill 11 and B25, and However, it is good also as a structure which provided the energizing member for waiting | standby for each latching operation part A25 and B25.

  The connecting member 9 shown in FIG. 1 of the above embodiment has been described by taking the shank 17 to be attached to the chuck of the electric drill as an example, but the shank 17 is attached to the arbor, You may make it attach to the chuck | zipper (connection part) of an electric drill or a drilling machine.

  Moreover, although the core main body 10 was mentioned as an example and demonstrated in the said embodiment as a cutter, you may attach the cutting tool for drilling other than the core main body 10. FIG.

  Further, as shown in FIG. 6, an annular protrusion 43 is provided along the inner peripheral surface of the core body insertion portion C15 of the above embodiment, and a center drill is formed on the inner peripheral surface of the protrusion 43. Eleven cylindrical portions 11b may be held. The protrusion 43 has a function of preventing the rotating center drill 11 from swinging. The projection 43 has an inner diameter that is larger than the diameters of the columnar portion 11 b and the cutting edge portion 32 of the center drill 11.

  And in the said embodiment, it was set as the structure which removes a desired connection member, a cutter, or a center drill separately from an adapter main body by moving either the latch release part to the axial direction of an adapter main body, Instead of this, for example, a desired cutter or a center drill may be separately removed from the adapter body by rotating any one of the unlocking portions in the circumferential direction of the adapter body.

  As described above, the cutter adapter according to the present invention enables the cutter and the center drill to be separately and quickly attached to and detached from the chuck of the electric drill, for example, according to the material and hole diameter of the drilling object. Even when it is necessary to frequently replace the cutter and center drill, it has an excellent effect of efficiently performing a drilling operation and is suitable for application to such an adapter for a cutter.

It is a half sectional view showing the state where the core main part etc. were attached to the adapter for cutters concerning the embodiment of this invention. FIG. 2 is a half sectional view showing a state in which a core body and a center drill are removed from the adapter according to the embodiment shown in FIG. 1. It is a half sectional view showing the state where a core body and a connecting member were removed from the same adapter concerning the embodiment. It is EE sectional drawing of the same adapter which concerns on the same embodiment shown in FIG. It is a figure for demonstrating the usage method of the adapter which concerns on the embodiment. It is a half sectional view showing other examples of the core body attached to the adapter according to the embodiment. It is a half sectional view showing a conventional shank attachment structure.

Explanation of symbols

7 Adapter for cutter 8 Core drill 9, 39, 40 Connecting member 10, 37 Core body 10a Core portion 10b, 37a Cutting blade C10c Shoulder member 11, 38 Center drill 11a, 38a Tip blade 11b Cylindrical portion 12 Adapter body A For connecting member Attachment structure B Attachment structure for center drill C Attachment structure for core body A13, B13, C13 Holding part B13a Inner cylinder part B13b Center part A14, B14, C14 Insertion hole C14a Bottom part A15, B15, C15 Insertion part A16, C16 Key-shaped convex part 17, 41, 42 Shank A18 Spear-shaped part A19, B19, C19 Locking groove A20, B20, C20 Locking hard ball (locking part)
A21, C21 Key groove A22 Abutting portion 23 Base end portion 24 Locking groove A25, B25, C25 Locking operation portion A25a, B25a Through hole B25b Projection B25c Bending portion A26, C26 Standby bias member A27, C27 Locking Pin A28, B28, C28 Locking hole A29, B29, C29 Locking release part A29a, B29a, C29a Projection A30, C30 Locking biasing member A31, C31 Shaft retaining ring 32 Cutting edge part B33 Step part C34 Projection Article 43 protrusion

Claims (6)

In the adapter for the cutter for attaching the cutter for drilling and the center drill separately to the connecting member connected to the rotation drive unit,
An adapter main body to which the connecting member is attached, and an insertion portion that is provided in the adapter main body corresponding to an insertion portion provided in each of the connecting member, the cutter, and the center drill. A holding portion having a hole; a locking portion provided corresponding to each of the holding portions; and locking the movement of each insertion portion inserted in the insertion hole in the drawing direction; and each locking portion Corresponding to the adapter main body, and an unlocking portion for releasing the locking of the insertion portion by the locking portion, and each insertion hole transmits torque to the insertion portion. It is formed in the cross section for the adapter for cutters characterized by the above-mentioned.   The cutter constitutes a core drill, a connecting member holding portion into which the insertion portion of the connecting member is inserted is formed at one end of the adapter body, and the cutter holding portion into which the cutter insertion portion is inserted is the adapter. The cutter adapter according to claim 1, wherein the cutter drill adapter is formed at the other end of the main body, and a center drill holding portion is provided at or near the center of the cutter holding portion.   In a state where the insertion portion of the connecting member is inserted into the corresponding insertion hole and attached, a hook-shaped portion provided on the connecting member comes into contact with the adapter main body, and the insertion portion of the center drill corresponds to the insertion portion. In a state where the insertion portion of the center drill is in contact with the insertion portion distal end of the connecting member, and the insertion portion of the cutter is inserted into the corresponding insertion hole and attached, The cutter adapter according to claim 1, wherein a shoulder portion formed on the cutter abuts on the adapter main body.   Each of the locking portions is movable to a protruding position that protrudes inward from the inner surface of the holding portion and a retracted position that retracts outward from the inner surface of the holding portion, and the adapter corresponds to the locking portions. A locking operation portion provided on the main body and movable between a standby position for holding the locking portion in the retracted position and a pushing position at which the locking portion can move to the protruding position; and the respective locking operations. A standby biasing member that biases the locking portion to the standby position, and a locking position that is provided in the adapter main body corresponding to each of the locking portions and holds the locking portion in a protruding position, and the locking portion An unlocking portion that is movable to an unlocking position that enables movement to the retracted position, and a latching biasing member that biases each of the unlocking portions to the locking position. The cutter adaptor according to any one of claims 1 to 3. .   A standby biasing member for biasing the locking operation portions for the connecting member and the center drill is shared, and the locking release portions for the connecting member and the center drill are biased. 5. The cutter adapter according to claim 4, wherein the latching biasing member is shared.   Each of the locking portions is a sphere, and each of the standby biasing member and the locking biasing member is a compression coil spring, and the locking operation portion is moved by the standby biasing member. The cutter adapter according to claim 4 or 5, wherein a stopper for stopping the stopper at the standby position is provided in each of the insertion holes or the locking operation portion.

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