JP3136334U - Electric rotary tool joint - Google Patents

Abstract

The present invention provides a compact joint that can be used in a simple, reliable, and safe manner by replacing a driver bit and a drill tool attached to the tip of an electric rotary tool, and capable of transmitting rotational force reliably and safely.
A portion of a base inner tube 10 is formed as an inclined notch 12 that is notched so as to incline toward the tip. The end near the tip of the outer spring 17 is formed as a lock pin 17 a extending in the diameter line direction of the base inner tube 10, and the lock pin 17 a is fitted into the inclined notch 12 of the base inner tube 10. The lock pin 17 a in the inclined notch 12 can be locked with respect to the groove of the tip tool inserted into the part 11. A tip 22 is provided with a magnet 22 in the tip fitting hole 21 of the tip joint b, the screw head 4a can be sucked, and the locked state is released by the unlocking cylinder 19 of the base joint a and is ejected in the tip direction. In the tip insertion hole 21, the magnet 22 can be stationary by the attractive force of the magnet 22.
[Selection] Figure 2

Description

  The present invention relates to a technical field of a joint used by being attached to an electric rotary tool.

  As a joint (bit body) attached to the electric rotary tool, for example, there is a conventional one described in Japanese Patent Laid-Open No. 8-118247.

That is, in the [Embodiment of the invention] in the same publication, as a second embodiment, a bit body having a structure in which a bit rod (hexagonal cross section) can be easily exchanged, that is, a magnet in which the bit rod is inserted and magnetized. There is disclosed a bit body in which a cylinder body provided in a bit insertion hole having a hexagonal cross section is provided, and a mounting body in which a curved locking groove to be mounted on a chuck portion of an automatic driver is formed at the base end of the cylinder body. .
Japanese Patent Laid-Open No. 8-267366

  According to the bit body described in the published patent publication, a bit rod such as a driver bit is fixed at the tip of the bit body by being magnetized by a magnet housed in a long cylinder forming the bit rod. Is done.

  Therefore, when the bit rod inserted into the bit insertion hole from the tip of the bit body is replaced with another tool such as a drill, if the magnetic force (attraction force) of the built-in magnet is strong, the bit rod is Hard to take out from.

  On the other hand, if the magnetic force of the magnet in the bit body is weak, the bit wrinkles inserted in the bit body may wobble, the rotational force may not be constant, and the screwing work such as screws and screws may be hindered.

  Further, the bit body is always a long and long cylinder only in the magnet portion, which is bulky and difficult to handle. Therefore, when tightening a screw or screw in a deep hole, it is necessary to replace the bit rod with a longer one and use it. bad.

  Therefore, the problem to be solved by the present invention is that a desired screwdriver bit or drill tool attached to the tip of the electric rotary tool can be easily and securely exchanged through the joint and used safely. Another object of the present invention is to provide a joint for an electric rotary tool having a compact design that can transmit a rotational force safely and reliably even when the tool such as a long screwdriver bit is mounted.

As a means for solving the above-mentioned problems, the joint for an electric rotary tool according to claim 1 includes a base inner tube 10 provided with a rod 1 on which an electric rotary tool is installed at the rear, and an outer periphery of the base inner tube 10. An outer spring 17 wound around the outer spring 17 and a base outer tube 15 provided with an outer hollow portion 18 provided on the outer periphery of the outer spring 17. It is a base joint a which can freely attach and detach the base end part of the tip tool 3 such as a drill,
A part of the base inner tube 10 is formed as an inclined notch 12 that is inclined and cut in the distal direction, and the end closer to the distal end of the outer spring 17 extends in the diameter line direction of the base inner tube 10. It is formed as a lock pin 17 a, and the lock pin 17 a is fitted in the inclined notch 12 of the base inner tube 10, and is a base end portion of the tip tool 3 inserted into the inner hollow portion 11 of the base inner tube 10. The lock pin 17a in the inclined notch 12 is configured to be lockable with respect to the groove 30.

  In the joint for an electric rotary tool according to the invention of claim 2, a slidable unlocking cylinder 19 is attached to the outer periphery of the base outer tube 15 of the base coupling a. Is formed with a ring body 19b having an insertion hole 19a into which the base inner tube 10 is inserted. As the unlocking cylinder 19 is moved to the rod 1 side, the inclined cutout of the base inner tube 10 is formed. The lock pin 17a fitted in the portion 12 is configured to be able to release the locked state of the tip tool 3 by being pulled out of the groove portion 30 of the tip tool 3 while being pushed toward the rod 1 by the ring body 19b. Features.

  The joint for an electric rotary tool according to the invention described in claim 3 includes an inner spring 14 for urging the tip tool 3 fitted in the inner hollow portion 11 of the base inner tube 10 of the base joint a in the tip direction. The inner hollow portion 11 of the inner tube 10 is loaded.

  The joint for an electric rotary tool according to the invention of claim 4 is provided with a connection ring 13 that can be connected to a separate tip joint b at the tip of the base inner tube 10 of the base joint a. Features.

  The joint for an electric rotary tool according to the invention of claim 5 is a tip joint b that is detachable from the tip of the base joint a, and the tip of the tip joint b is a tip tool 3 such as a driver bit or a drill. A magnet 22 is provided on the outer periphery of the tip insertion hole 21, and the head 4 a of the screw 4 and the like can be attracted to the magnet 22, and the base The tip tool 3 released from the locked state by the lock release cylinder 19 of the joint a and ejected in the tip direction is configured to be freed by the attractive force of the magnet 22 in the tip fitting hole 21 of the tip joint b. It is characterized by being.

  In the joint for an electric rotary tool according to the invention of claim 6, the tip fitting insertion hole 21 of the tip joint b detachably attached to the tip of the base joint a is formed in the tip flat surface portion 21a having a flat tip. A magnet 22 is also provided on the tip flat surface portion 21a.

  In the joint for an electric rotary tool according to the seventh aspect of the invention, the tip joint b detachably attached to the tip of the base joint a covers the tip inner tube 20 having the tip fitting insertion hole 21 and the tip inner tube 20. A distal end outer tube 25 is formed in a double tube structure. A spring 24 is wound around the inner end distal tube 20 and locked to the outer end tube 25. The tube 20 is configured to be extendable and retractable.

  The joint for an electric rotary tool according to the invention of claim 8 is such that the inner side surface of the proximal end portion of the distal end outer tube 25 of the distal end joint b that can be freely connected to the connection ring 13 of the base joint a is the connection ring. 13 is formed in a base end connection hole 26 having a female screw 26a that can be screwed, and the outer peripheral surface of the connection ring 13 of the base joint a is formed in a male screw 13a.

  In the joint for an electric rotary tool according to the ninth aspect of the present invention, the base end portion of the distal end outer tube 25 of the distal end joint b that can be connected to the connection ring 13 of the base joint a is inserted into the connection ring 13. The base end connection hole 26 is formed, and a protrusion is provided on the inner side surface of the base end connection hole 26.

  The joint for the electric rotary tool according to the first aspect of the present invention includes a base inner pipe provided with a rod on which the electric rotary tool is installed at the rear, an outer spring wound around the outer circumference of the base inner pipe, A base outer tube provided with an outer hollow portion provided on the outer periphery of the outer spring, and a base joint portion of a tip tool such as a driver bit or a drill is detachably attached to the inner hollow portion of the base inner tube. A lock in which a part of the inner tube is formed as an inclined notch that is inclined and cut in the tip direction, and an end closer to the tip of the outer spring extends in the diameter line direction of the base tube. Since it is formed as a pin and the lock pin is fitted into the inclined notch portion of the base inner tube, the inclined pin is inclined with respect to the groove portion of the proximal end portion of the tip tool inserted into the inner hollow portion of the base inner tube. Lock pin in the notch Reliably locked, transmission of the rotational force to the tool bit smooth, Usage safety of the electric rotating tool is improved. In addition, this joint is easy to handle with a compact design, and contributes to a reduction in manufacturing cost.

  According to a second aspect of the present invention, there is provided a joint for an electric rotary tool, wherein a slidable unlocking cylinder is attached to an outer periphery of a base outer pipe of the base coupling, and a base is disposed inside the unlocking cylinder. Since the ring body having the insertion hole into which the inner pipe is inserted is formed, the lock pin fitted into the inclined notch portion of the base inner pipe is moved as the unlocking cylinder is moved to the rod side. While being pushed out in the rod direction by the ring body, the tool can be easily and reliably released from the groove of the tip tool and is excellent in usability.

  According to a third aspect of the present invention, there is provided the joint for an electric rotary tool, wherein the inner spring for urging the tip tool inserted into the inner hollow portion of the base inner tube of the base joint in the distal direction is an inner hollow of the base inner tube. Because it is loaded in the part, when the lock is released, the tip tool can be easily taken out, and replacement work with a different tip tool can be performed easily.

  In the joint for an electric rotary tool relating to the present invention according to claim 4, a connection ring that can be connected to a separate tip joint is provided at the tip of the base inner pipe of the base joint. Connection with the used tip joint can be performed safely and reliably.

  The electric rotary tool joint relating to the present invention according to claim 5 is a tip joint detachably attached to the tip of the base joint, and the tip of the tip joint is fitted with a tip tool such as a driver bit or a drill. Since it is formed in the tip fitting insertion hole and the magnet is provided on the outer periphery of the tip fitting insertion hole, the head of the screw can be attracted to the magnet and the work efficiency is good. In addition, the tip tool released from the locked state by the unlocking cylinder of the base joint and ejected in the distal direction is stopped by the attractive force of the magnet in the tip fitting hole of the tip joint, and the tip tool is unexpectedly moved. There is no danger of popping out and it can be used safely.

  According to a sixth aspect of the present invention, there is provided a joint for an electric rotary tool, wherein the tip fitting hole of the tip joint detachably attached to the tip of the base joint is formed in a flat tip flat surface portion, and the tip flat surface portion also has a magnet. Therefore, the head of the screw or screw is attracted to the tip flat surface portion, which contributes to the improvement of work efficiency.

  The joint for an electric rotary tool relating to the present invention according to claim 7 is such that the tip joint detachably attached to the tip of the base joint includes a tip inner tube having a tip fitting insertion hole and a tip outer tube covering the tip inner tube. Since it is formed in a double tube structure, a spring is wound around the inner tube at the distal end and locked to the outer tube at the distal end, and the inner tube at the distal end is configured to be stretchable at the distal end of the outer tube at the distal end. In addition, the screw head is easily adsorbed, and the pop-out force of the unlocked tip tool is buffered to improve workability.

  The joint for an electric rotary tool relating to the present invention according to claim 8 is such that the inner side surface of the proximal end portion of the distal end outer tube of the distal end joint that can be freely connected to the connection ring of the base joint can be screwed into the connection ring. Since the outer peripheral surface of the connection ring of the base joint is formed as a male thread, it contributes to the improvement of safety due to the strong connection between the base joint and the tip joint. .

  The joint for an electric rotary tool according to the present invention according to claim 9, wherein a proximal end portion of a distal end outer tube of a distal end joint that is freely connectable to a connection ring of the base joint is a proximal end connection hole into which the connection ring is inserted. Since the protrusion is provided on the inner side surface of the base end connection hole, the base joint and the tip joint can be easily connected with a simple structure.

  The joint for electric rotary tools according to claims 1 to 9 is used as a joint for an electric rotary tool (not shown) and a tool such as a driver bit or a drill (hereinafter sometimes referred to as a tip tool) attached to the tip of the electric rotary tool. Is done. Hereinafter, an embodiment in which a driver bit is used as a tool will be described with reference to the drawings.

  This electric rotary tool joint is suitably used in a combination type (see FIGS. 2 and 3) in which a base joint a and a tip joint b, which are two types of pipes as shown in FIG. 1, are combined. It is also possible to use only the base joint a (see FIG. 7).

  First, the base joint a will be described.

  As shown in FIGS. 1 to 4, the basic structure of the base joint a of the present embodiment includes a base inner tube 10 provided with a rod 1 on which an electric rotary tool is installed at the rear, and the base inner tube 10. The outer spring 17 is wound around the outer periphery, and the base outer tube 15 is attached to the outer periphery of the outer spring 17 in such a size that a space for the outer hollow portion 18 is provided on the outer periphery. A C-shaped ring is fitted and fixed to the base end of the base outer tube 15 (see FIG. 4).

  The inner hollow portion 11 of the base inner tube 10 is loaded with an inner spring 14 that urges the driver bit 3 inserted into the inner hollow portion 11 in the distal direction. Further, a connection ring 13 that can be connected to a distal end joint b described later is provided at the distal end of the base inner tube 10.

  The hollow interior of the base inner tube 10 is formed in an inner hollow portion 11 having a hexagonal cross section, and the base end of the driver bit 3 having a hexagonal cross section is formed in the inner hollow portion 11. It is the structure which a part penetrates and becomes detachable (lockable) (refer FIGS. 5-7).

  A part of the base inner tube 10 is formed as an inclined notch portion 12 that is inclined and notched in the distal direction. That is, the inclined notch 12 is a notch that is slightly larger than the diameter of the lock pin 17 a of the outer spring 17 described below, and is inclined in the distal direction from the upper outer peripheral surface of the base inner tube 10. It is cut out to the vicinity of the axis.

  The outer spring 17 of the push spring will be described. The end closer to the tip of the outer spring 17 is formed as a lock pin 17 a processed so as to extend in the diameter line direction of the base inner tube 10. And the said lock pin 17a is engage | inserted by the inclination notch 12 of the above-mentioned base inner pipe | tube 10, and the inside of the inclination notch 12 is comprised freely.

  When the driver bit 3 is not inserted into the inner hollow portion 11, the lock pin 17 a is positioned near the deepest tip of the inclined notch portion 12 as shown in FIGS. 1 and 2. . Here, when the driver bit 3 is inserted into the inner hollow portion 11, the driver bit 3 is moved to a substantially intermediate position of the inclined notch portion 12 as shown in FIGS. 6 and 7. However, in any case, the lock pin 17a does not come out of the inclined notch 12.

  Accordingly, when the driver bit 3 is inserted into the inner hollow portion 11 of the base inner tube 10 and further pushed in, the base end portion of the driver bit 3 connects the lock pin 17a in the inclined notch portion 12 to the inclined notch portion. 12 is moved backward (obliquely upward). Subsequently, the lock pin 17a slides and rests on the curved groove portion 30 formed in the driver bit 3 slightly so that the driver bit 3 is locked in the base joint a and does not move ( (See FIG. 5A).

  A lock release cylinder 19 that is larger than the base outer tube 15 and is slidable is attached to the outer periphery of the base outer tube 15 of the base joint a. Inside the unlocking cylinder 19, a ring body 19b is formed perpendicular to the axial direction. An insertion hole 19a that is slightly larger than the outer periphery of the base inner tube 10 is formed in the center portion of the ring body 19b so that the base inner tube 10 can be inserted.

  Next, how to release the locked state will be described.

  As described above, the lock pin 17a is stationary in the groove portion 30 of the driver bit 3 and the driver bit 3 is locked. From the state shown in FIG. 5A, as shown by the arrow in FIG. The cylinder 19 is moved in the rear rod 1 side direction.

  Then, the rear side surface of the ring body 19b of the unlocking cylinder 19 pushes out the lock pin 17a fitted in the groove portion 30 of the driver bit 3 in the inclined cutout portion 12 in the rod 1 direction (rear), and finally The lock pin 17 a gets over the groove 30. At the same time, the driver bit 3 is urged by the inner spring 14 in the inner hollow portion 11 and is ejected in the distal direction, so that the driver bit 3 is unlocked (FIG. 5B). The means for controlling the jumping speed of the driver bit 3 at that time will be described later.

  Next, the tip joint b will be described.

  The tip joint b of this embodiment is detachable from the tip of the base joint a described above. The distal end portion of the distal end joint b is formed in a distal end insertion hole 21 into which the driver bit 3 is inserted.

  A magnet 22 is provided on the outer periphery of the tip insertion hole 21, and the head 4a of the screw 4 and the like can be attracted to the magnet 22 (see FIG. 6).

  That is, the tip joint b of the present embodiment is formed in a double tube structure including a tip inner tube 20 having a tip fitting hole 21 and a tip outer tube 25 that covers the tip inner tube 20. A magnet 22 is attached to the tube 20.

  Further, a substantially middle portion of the inner tube 20 at the tip is formed in a slightly narrowed notch 23, and a spring 24 is wound around the outer periphery of the notch 23. On the other hand, an inner ring 28 that protrudes slightly inward is provided at the substantially inner peripheral portion of the distal outer tube 25, and this inner ring 28 fits into the proximal end portion of the notch 23 of the distal inner tube 20. The distal inner tube 20 is locked to the distal outer tube 25. Therefore, the distal end inner tube 20 is telescopic at the distal end of the distal end outer tube 25.

  Therefore, in the use state in which the tip joint b and the base joint a are connected, the driver bit 3 released from the lock state by the unlocking cylinder 19 of the base joint a as described above is ejected in the tip direction. There is no fear of popping out of the tip joint b by being stopped by the attractive force (magnetic force) of the magnet 22 in the tip fitting insertion hole 21 of b (see FIG. 5B). At that time, the driver bit 3 jumping out in the distal end direction is surely stopped in the distal end joint b while its momentum is buffered by the spring force of the spring 24 of the inner distal end tube 20.

  Furthermore, the tip fitting insertion hole 21 is formed in a tip flat surface portion 21a having a flat tip, and a magnet 22 is also provided on the tip flat surface portion 21a.

  Therefore, when the head 31 of the driver bit 3 protrudes slightly from the tip of the tip joint b and the tip of the tip joint b is brought close to the head 4a of the screw 4, the suction force of the magnet 22 causes the inside of the tip. The tube 20 extends in the distal direction (see the arrow in FIG. 6), and the head 4a of the screw 4 is attracted to the distal flat surface portion 21a while being fitted to the head 31 of the driver bit 3. It is very good.

  The magnet 22 can also be applied to a joint c having a simple structure as shown in FIG. 8 and a joint d having a structure of the type shown in FIG. Note that the joint c in FIG. 8 belongs to the single-use die of the base joint a. In the illustrated example, the groove 30 of the driver bit 3 is locked by a lock ball 50. The joint d in FIG. 9 belongs to the connection type of the base joint a and the tip joint b, so to speak, and the head portion of the screw 4 is attached to the tip flat surface portion 22a of the ring-shaped magnet 22 built in the tip portion of the joint d. 4a is adsorbed.

  A connection structure between the base joint a and the tip joint b will be described.

  The proximal end portion of the distal end joint b near the rod 1 in the distal end outer tube 25 has a structure that can be easily connected to the connection ring 13 of the base joint a, and the inner surface of the internal thread 26a can be screwed into the connection ring 13. Is formed in the base end connection hole 26. And the outer peripheral surface of the connection ring 13 of the said base coupling a is formed in the external thread 13a (refer FIG. 1, FIG. 4). Therefore, the base joint a and the distal joint b can be easily and reliably connected by screwing the proximal end connection hole 26 of the distal outer pipe 25 into the connection ring 13 of the base joint a (FIG. 2).

  Alternatively, the male screw 13a is not formed on the connection ring 13, and the female screw 26a is not formed on the base end connection hole 26, but a small protrusion (not shown) is formed on the inner surface of the base end connection hole 26. It is possible to implement even a simple structure provided with a). This is because the projection provided in the base end connection hole 26 of the distal end joint b can press and lock the connection ring 13 of the base joint a.

  Thus, as described above with reference to FIGS. 5 and 6, the long screwdriver bit 3 can be locked and released safely and reliably in a state where the base joint a and the tip joint b are connected.

  Similarly, as shown in FIG. 7, only the base joint a can be used to lock or unlock the driver bit 3 in the base joint a.

  In particular, when tightening screws 4 or screws in deep holes, it is possible to lock the long screwdriver bit 3 into the base joint a and connect the base joint a without connecting the tip joint b without difficulty. is there.

It is the partially cutaway sectional view which separated and showed the base joint and tip joint of the joint for electric rotary tools of the present invention.

It is the partially cutaway sectional view showing the connection state of the base joint of the joint for electric rotary tools, and the tip joint.

It is the whole perspective view showing the joint for electric rotary tools.

It is the whole perspective view which decomposed | disassembled and showed the coupling for electric rotary tools.

A and B are sectional views showing a locked state and a released state of the tip tool.

It is a partially cutaway sectional view showing the use state in the locked state of the tip tool.

It is sectional drawing which showed the independent use state of the base coupling.

It is sectional drawing which showed different embodiment.

It is sectional drawing which showed further different embodiment.

Explanation of symbols

a base joint b tip joint 1 rod 10 base inner tube 11 inner hollow portion 12 inclined notch portion 13 connecting ring 13a male screw 14 inner spring 15 base outer tube 17 outer spring 17a lock pin 18 outer hollow portion 19 unlocking cylinder 19a fitting Insertion hole 19b Ring body 20 Tip inner tube 21 Tip fitting insertion hole 21a Tip flat surface portion 22 Magnet 24 Spring 25 Tip outer tube 26 Base end connection hole 26a Female screw 3 Tip tool (driver bit)
30 Groove 4 Screw 4a Head

Claims (9)

A base inner tube provided with a rod on which the electric rotary tool is installed at the rear, an outer spring wound around the outer periphery of the base inner tube, and an outer hollow portion provided around the outer spring. A base joint that includes a base outer tube, and a base end portion of a tip tool such as a driver bit or a drill can be freely attached to and detached from the inner hollow portion of the base inner tube,
A part of the base inner tube is formed as an inclined notch that is inclined and cut in the tip direction, and the tip end portion of the outer spring is formed as a lock pin extending in the diameter line direction of the base inner tube. The lock pin is fitted into the inclined notch portion of the base inner tube, and the lock in the inclined notch portion is locked against the groove portion of the base end portion of the tip tool inserted into the inner hollow portion of the base inner tube. A joint for an electric rotary tool, wherein the pin is configured to be freely lockable.   A slidable unlocking cylinder is attached to the outer periphery of the base outer tube of the base joint, and a ring body having an insertion hole into which the inner pipe is inserted is formed inside the unlocking cylinder. As the unlocking cylinder is moved to the rod side, the lock pin fitted into the inclined notch of the base inner tube is pushed out in the rod direction by the ring body, and the groove of the tip tool The joint for an electric rotary tool according to claim 1, wherein the joint is configured to be able to be released from the locked state of the tip tool.   The inner spring for urging the tip tool inserted in the inner hollow portion of the base inner tube of the base joint in the distal direction is loaded in the inner hollow portion of the base inner tube. The joint for electric rotary tools according to claim 2.   4. The electric rotation according to claim 1, wherein a connection ring that can be connected to a separate tip joint is provided at a tip of a base inner pipe of the base joint. Tool fittings.   A tip joint that is detachable from the tip of the base joint, and a tip portion of the tip joint is formed in a tip fitting hole into which a tip tool such as a driver bit or a drill is fitted, and a magnet is inserted into the tip fitting hole. The tip tool that is capable of attracting the head of a screw and the like to the magnet and that is unlocked by the unlocking cylinder of the base joint and is ejected in the distal direction is the tip of the tip joint. The joint for an electric rotary tool according to claim 1, 2, 3, or 4, wherein the joint is configured so as to be freely stationary by an attractive force of the magnet in the insertion hole.   The tip fitting insertion hole of the tip joint detachably attached to the tip of the base joint is formed at a tip flat surface portion having a flat tip, and a magnet is also provided to the tip flat surface portion. Or the coupling for electric rotary tools described in claim 2 or claim 3 or claim 4 or claim 5.   The tip joint detachably attached to the tip of the base joint is formed in a double pipe structure including a tip inner tube having a tip fitting insertion hole and a tip outer tube covering the tip inner tube. A spring is wound around and locked to a distal outer tube, and the distal inner tube is configured to be stretchable at the distal end of the distal outer tube. Alternatively, the joint for an electric rotary tool according to claim 4, claim 5, or claim 6.   The base end portion of the distal end outer tube of the distal end joint that can be freely connected to the connection ring of the base joint is formed in a proximal end connection hole having an inner surface whose internal surface is threadably engageable with the connection ring. The outer peripheral surface of the connection ring of the joint is formed as a male screw, and is described in claim 1 or claim 2 or claim 3 or claim 4 or claim 5 or claim 6 or claim 7. Joint for electric rotary tool.   A proximal end portion of a distal end outer tube of a distal end joint that can be freely connected to a connection ring of the base joint is formed in a proximal end connection hole into which the connection ring is inserted, and a protrusion on an inner surface of the proximal end connection hole The joint for an electric rotary tool according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7, or claim 8.

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