Rotary Tool Stand

Abstract

To improve usability more than before.SOLUTION: A drill stand 1 can be fitted to a driver drill 70 that includes: a motor M; a housing 73 for storing the motor M; and a drill chuck 74 rotated by the motor M. The drill stand 1 includes: a base 2 abutting on a work piece; and a parallel ruler 20 installed to the base 2 and capable of guiding a movement of the base 2 along the work piece.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a rotary tool stand for supporting a rotary tool such as a driver drill. [Background technology]

[0002] A rotary tool stand may be used when performing drilling or other operations using a rotary tool such as a driver drill. Patent Document 1, for example, discloses an invention of this rotary tool stand that includes a base placed on a workpiece, a support column extending upward from the base, and a drill clamp mounted on the support column so as to be movable up and down. The body of a rotary tool such as an electric drill can be fixed to the drill clamp using a bolt. In this rotary tool stand, the rotary tool can be moved up and down together with the drill clamp by operating an operating lever mounted on the drill clamp up and down. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-160110 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional rotary tool stands described above, there has been a demand for further improvements in ease of use, such as improved positioning relative to the workpiece and improved stability during use.

[0005] SUMMARY OF THE INVENTION An object of the present disclosure is to provide a rotary tool stand that is expected to be even more user-friendly. [Means for solving the problem]

[0006] To achieve the above object, the first configuration of the present disclosure may be attachable to a rotary tool including a motor, a housing that accommodates the motor, and a tool bit holder that is rotated by the motor. The first configuration includes a base that contacts the workpiece, and the base is provided with a guide portion that can guide the movement of the base along the workpiece. And, A pole is connected to the base, and a coupling unit to which the rotary tool can be coupled is provided on the pole so as to be movable along the pole. It's fine. [Effects of the Invention]

[0007] According to the rotary tool stand of the present disclosure, further improvements in usability can be expected. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a drill stand according to a first embodiment. [Figure 2] FIG. 2 is a rear view of the drill stand of the first embodiment. [Figure 3] FIG. 1 is a side view of a drill stand according to a first embodiment. [Figure 4] FIG. 2 is a perspective view showing the drill stand of the first embodiment with a parallel ruler removed from the base. [Figure 5] FIG. 1 is a perspective view showing a state in which the drill stand of Example 1 is attached to a driver drill. [Figure 6] FIG. 1 is a plan view showing a state in which the drill stand of Example 1 is used. [Figure 7] FIG. 10 is a perspective view of a drill stand according to a second embodiment. [Figure 8] FIG. 10 is a rear view of the drill stand of the second embodiment. [Figure 9] FIG. 10 is a side view of the drill stand of the second embodiment. [Figure 10] FIG. 10 is a perspective view showing a state in which the cover of the clamp portion is omitted in the drill stand of Example 2. [Figure 11] FIG. 10 is a perspective view showing a state in which the drill stand of the second embodiment is attached to a driver drill. [Figure 12] FIG. 10 is a plan view showing a state in which the drill stand of Example 2 is used. [Figure 13] FIG. 10 is a perspective view of a drill stand according to a third embodiment. [Figure 14] FIG. 10 is a rear view of the drill stand of the third embodiment. [Figure 15] FIG. 10 is a side view of the drill stand of the third embodiment. [Figure 16] FIG. 10 is a perspective view showing a state in which the drill stand of Example 3 is attached to a driver dolly. [Figure 17] FIG. 11 is a perspective view showing a state in which the drill stand of the third embodiment is attached to a driver drill to perform inclined drilling. [Figure 18] FIG. 10 is a perspective view of a drill stand according to a fourth embodiment. [Figure 19] FIG. 10 is a perspective view showing a state in which a division base is removed in the drill stand of Example 4. [Figure 20] FIG. 10 is a side view showing a state in which the divided bases are attached to the driver drill in a first attachment mode in the drill stand of Example 4. [Figure 21] FIG. 10 is a side view showing the split base attached to the driver drill in a second attachment mode in the drill stand of the fourth embodiment. [Figure 22] FIG. 10 is a side view showing the state in which only the main body base is attached to the driver drill in the drill stand of Example 4. DETAILED DESCRIPTION OF THE INVENTION

[0009] In one embodiment of the first configuration of the present disclosure, the guide portion may be a parallel ruler that protrudes from the base to either the left or right side, has an abutment portion in the front-to-rear direction with the workpiece, and is capable of changing the left-to-right position of the abutment portion. This configuration allows accurate guidance of the back and forth movement of the base along the workpiece. In one embodiment of the first configuration of the present disclosure, the parallel ruler may be removable from the base. With this configuration, when the parallel ruler is not in use, it can be removed to allow other work to be carried out without any hindrance. In one embodiment of the first configuration of the present disclosure, the guide portion may be a pair of clamps that protrude to the left and right from the base, have abutment portions for contacting the workpiece at the left and right outer ends, and the left and right positions of the abutment portions can be changed. This configuration allows accurate guidance of the back and forth movement of the base along the workpiece. In one embodiment of the first configuration of the present disclosure, the pair of clamps may be capable of changing their positions in the left-right direction in unison. According to this configuration, the rotary tool can be easily positioned at the center position in the left-right direction.

[0010] In one embodiment of the second configuration of the present disclosure, the rotary tool stand may include a base that abuts against the workpiece, and the reaction force receiving portion may be provided on the base. With this configuration, the reaction force receiving portion can be stably installed, and rotation of the housing can be reliably restricted. In one embodiment of the second configuration of the present disclosure, the reaction force receiving portion may be a shaft that protrudes upward from the base and is located on the side of the housing that rotates due to the reaction force. According to this configuration, the reaction force receiving portion can be easily formed. In one embodiment of the second configuration of the present disclosure, the housing may have a grip portion extending rearward with the tool bit holding portion facing downward, and the reaction force receiving portion may regulate rotation of the grip portion. According to this configuration, rotation can be restricted at a position away from the tool bit holder where the load torque is applied and where the reaction force is small, and the reaction force receiving portion can be formed compactly. In one embodiment of the second configuration of the present disclosure, the reaction force receiving portion may be provided so that its position in the front-rear direction can be changed. According to this configuration, the reaction force receiving portion can be installed at an optimum position according to the posture of use of the rotary tool, etc. In one embodiment of the second configuration of the present disclosure, the base may include a detachable extension base extending rearward, and the reaction force receiving portion may be provided on the extension base. This configuration allows the reaction force receiving portion to be easily added to an existing base. The extension base also increases the stability of the base, preventing it from tipping over.

[0011] In one embodiment of the first and second configurations of the present disclosure, a pole may be connected to the base, and a drill chuck capable of holding the tool tip holder may be provided on the pole so as to be movable along the pole. According to this configuration, the rotary tool can be easily coupled to the drill chuck, and the rotary tool can be accurately moved via the drill chuck. In one embodiment of the first and second configurations of the present disclosure, a pair of poles may be provided, and the drill chuck may be disposed between the pair of poles. With this configuration, the drill chuck is supported in a well-balanced manner, and the movement of the rotary tool is stabilized. In one embodiment of the first and second configurations of the present disclosure, the base includes a main base and a split base that is detachable from the main base, and the base may be selectable between a longest length in which the split base is attached to the main base and a shortest length in which the split base is removed and only the main base remains. With this configuration, the length of the base can be adjusted to suit the working space, and drilling work can be performed without hindrance even near a wall. Therefore, further improvements in usability can be expected. In one embodiment of the first and second configurations of the present disclosure, the divided base may be attachable to the main body base by selecting between a first attachment mode resulting in the longest length and a second attachment mode resulting in an intermediate length that is shorter than the longest length and longer than the shortest length. This configuration allows for more flexibility in selecting the length of the base, further improving usability. [Example]

[0012] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a perspective view of a drill stand 1, which is an example of a rotary tool stand of a first configuration of the present disclosure. Fig. 2 is a rear view of the drill stand 1. Fig. 3 is a side view of the drill stand 1. The drill stand 1 includes a base 2, a pair of poles 3, 3, and a chuck unit 4. The base 2 is rectangular in plan view, and has an oblong through-hole 5 extending in the front-to-rear direction formed through its center. A pair of support plates 6, 6 are provided on the left and right sides of the top surface of the base 2, facing upward. Each pole 3 is provided with a connecting plate portion 7 at its lower end. The upper side of each pole 3, excluding the lower end, has a circular cross section. The connecting plate portions 7, 7 are arranged on the left and right outer sides of the support plate portions 6, 6. Each connecting plate portion 7 is connected to the connecting plate portion 7 from the left and right outer sides by thumb screws 8. Therefore, when the thumb screws 8 are loosened, each pole 3 can rotate back and forth around the connecting plate portion 7. When the thumb screws 8 are tightened, each pole 3 can be fixed at any angle. Cylindrical stoppers 9, 9 are provided on the poles 3, 3 above the connecting plate portions 7, 7. A cap 10 is attached to the upper end of each pole 3 to prevent the chuck unit 4 from coming off.

[0013] The chuck unit 4 includes a drill chuck 11 and a retaining cylinder 12. The drill chuck 11 is supported facing downward and is capable of holding a drill bit or the like at its lower end. The drill chuck 11 is integrally provided with a shaft 13 at its center that protrudes upward from the retaining cylinder 12. The holding cylinder 12 is disposed between the poles 3, 3. The holding cylinder 12 rotatably holds the shaft 13 at the center of the poles 3, 3 in the left-right direction. A pair of blades 14, 14 that protrude to the left and right are provided on the left and right sides of the holding cylinder 12. The poles 3, 3 pass through the left and right ends of the blades 14, 14. A thumb screw 15 is screwed into the right blade 14 from the rear. By screwing in the thumb screw 15, the chuck unit 4 can be fixed at any position along the pole 3. A pair of retaining rings 16, 16 are provided on the left and right poles 3, 3 between the stoppers 9, 9 and the chuck unit 4. A thumb screw 17 is threaded into each retaining ring 16 from the rear. By screwing in the thumb screw 17, each retaining ring 16 can be fixed at any position along the poles 3, 3. By adjusting the vertical position of the retaining rings 16, 16, it is possible to set the lower limit position at which the chuck unit 4 abuts.

[0014] A parallel ruler 20 is attached to the base 2. As shown in FIG. 4, the parallel ruler 20 has a pair of slide plates 21 and a contact plate 22. The slide plates 21 are strip-shaped plates extending in the left-right direction. The contact plate 22 is joined in the front-rear direction between the right ends of the slide plates 21. A bent piece 23 that is bent downward is formed on the right end of the contact plate 22. A pair of mounting grooves 25, 25 extending in the left-right direction are formed on the front and rear of the top surface of the base 2. The slide plates 21, 21 of the parallel ruler 20 are inserted into the mounting grooves 25, 25 so that they can slide in the left-right direction. A fixing portion 26 through which the slide plate 21 passes is provided at a position closer to the right of each mounting groove 25. A thumb screw 27 is screwed into each fixing portion 26 from above. When the thumbscrews 27, 27 of the fixing portions 26, 26 of the parallel ruler 20 are loosened, the slide plates 21, 21 can be slid left and right along the mounting grooves 25, 25. Therefore, the abutment plate 22 can be pulled out from the innermost position where it abuts against the right side of the base 2 to the outermost position where the left end of the slide plates 21, 21 can be pressed by the thumbscrews 27, 27. When the thumbscrews 27, 27 are screwed in at the determined pulled-out position, the slide plates 21, 21 are pressed against the bottom surfaces of the mounting grooves 25, 25. Therefore, the abutment plate 22 is fixed in that pulled-out position.

[0015] As shown in FIG. 5, the driver drill 70 to which the drill stand 1 is attached includes a main body 71 extending vertically and a grip 72 extending rearward from the main body 71. The main body 71 includes a housing 73 and houses a motor M and an output unit (not shown) therein. The output unit includes a spindle (not shown) that protrudes downward from the lower end of the housing 73. A drill chuck 74 is integrally attached to the lower end of the spindle. The grip 72 is formed integrally with the housing 73. A switch (not shown) is provided within the grip 72. The switch has a trigger 75 that protrudes downward from the grip 72. A battery attachment unit 76 is provided at the rear end of the grip 72. A battery pack 77 is attached to the battery attachment unit 76.

[0016] In the drill stand 1 configured as described above, the shaft 13 of the chuck unit 4 is gripped by the drill chuck 74 of the driver drill 70, which is facing downward, as shown in Fig. 5. Then, the drill chuck 11 is integrally connected to the drill chuck 74 of the driver drill 70 via the shaft 13. When performing drilling or other operations, the operator first abuts the base 2 of the drill stand 1 against the workpiece to position the drilling position within the through-hole 5. Next, the operator fixes the poles 3 at the desired angle using the thumbscrews 8. Then, the operator loosens the thumbscrew 15 of the drill chuck 11 and the thumbscrews 17 of the retaining rings 16. In this state, the operator grasps the grip portion 72 of the driver drill 70 and depresses the trigger 75. This activates the motor M, rotating the spindle and rotating the drill chuck 11. If the operator then pushes the driver drill 70, along with the chuck unit 4, toward the workpiece, the chuck unit 4 slides downward along the poles 3. This allows the drill bit attached to the drill chuck 11 to perform drilling or other operations on the workpiece. When the operator finishes the operation and pulls the driver drill 70 upward, the chuck unit 4 rises along the poles 3 and moves away from the workpiece.

[0017] When drilling multiple holes continuously in a line in the workpiece, as shown in Figure 6, the parallel ruler 20 is attached to the base 2 and fixed at a predetermined extension position from the base 2. Next, the bent piece 23 of the abutment plate 22 is abutted against any flat surface, such as the side of the workpiece W, and the drilling operation is performed at the predetermined position. After the first hole has been drilled, the bent piece 23 is slid along the side of the workpiece W while the base 2 is moved linearly back and forth to position the next hole, and the drilling operation is performed in the same way. By repeating this process, multiple holes can be formed in a line. When the parallel ruler 20 is not in use, the thumb screws 27, 27 can be loosened and the slide plates 21, 21 can be removed from the mounting grooves 25, 25. When the drill stand 1 is not in use, the drill chuck 74 is operated to release the grip on the shaft 13, and the drill stand 1 can be removed from the driver drill 70 as is.

[0018] The drill stand 1 of the first embodiment can be attached to a driver drill 70 (an example of a rotary tool) that includes a motor M, a housing 73 that accommodates the motor M, and a drill chuck 74 (an example of a tool tip holder) that is rotated by the motor M. The drill stand 1 also includes a base 2 that abuts against a workpiece W, and the base 2 is provided with a parallel ruler 20 (an example of a guide) that can guide movement of the base 2 along the workpiece W. This configuration allows the base 2 to be easily moved linearly along the workpiece W. Therefore, when drilling holes at regular intervals in the workpiece W, the holes can be drilled quickly and accurately, and further improvements in usability can be expected.

[0019] The guide portion is a parallel ruler 20 that protrudes to the right from the base 2 and has an abutment plate 22 (an example of an abutment portion) in the front-rear direction for contacting the workpiece W, and the position of the abutment plate 22 in the left-right direction can be changed. Therefore, the back and forth movement of the base 2 along the workpiece W can be accurately guided. The parallel ruler 20 is detachable from the base 2 . Therefore, when the parallel ruler 20 is not in use, it can be removed to allow other work to be carried out without any hindrance.

[0020] A pole 3 is connected to the base 2, and a drill chuck 11 capable of holding a drill chuck 74 of a driver drill 70 is provided on the pole 3 so as to be movable along the pole 3. Therefore, the driver drill 70 can be easily coupled to the drill chuck 11, and the driver drill 70 can be accurately moved up and down via the drill chuck 11. A pair of poles 3, 3 is provided, and the drill chuck 11 is disposed between the pair of poles 3, 3. Therefore, the drill chuck 11 is supported in a well-balanced manner, and the vertical movement of the driver drill 70 is stabilized.

[0021] A modification of the first embodiment will now be described. The shape of the parallel ruler is not limited to the above example. For example, there may be only one slide plate, and the parallel ruler may be T-shaped in plan view. The slide plate may be inserted into a through-hole provided in the base instead of the mounting groove, so that it can slide. A rod-shaped slide portion may be used instead of the slide plate. The abutment portion is not limited to being plate-shaped either. The parallel ruler may be provided on the left side of the base instead of the right side. The parallel ruler does not have to be detachable. [Example]

[0022] Next, another embodiment of the present disclosure will be described, with the same components as those in the first embodiment being given the same reference numerals and redundant description being omitted. 7 to 9 show a drill stand 1A, which is another example of a rotary tool stand according to the first configuration of the present disclosure. In this drill stand 1A, the base 2 extends further rearward than in the first embodiment. A clamp unit 30 is provided at the rear of the base 2. As shown in FIG. 10, the clamp unit 30 is housed in a housing unit 31 recessed in the base 2. The housing unit 31 is closed by a lid 32 that is screwed to the base 2. The clamp unit 30 has an adjustment thumbscrew 33, a pair of left clamps 34A and right clamps 34B, and a fixing setscrew 35. The adjustment thumbscrew 33 is rotatably provided at the center of the storage unit 31. An adjustment pinion 36 is integrally provided at the lower end of the adjustment thumbscrew 33. The upper end of the adjustment thumbscrew 33 penetrates the lid 32 and protrudes from the upper surface of the base 2.

[0023] The left and right clamps 34A, 34B are strip-shaped and are provided in front of and behind the adjustment pinion 36 so as to be slidable in the left-right direction along the inner surface of the accommodating section 31. A rack 37 (teeth are omitted in FIG. 10) that meshes with the adjustment pinion 36 is provided on each of the opposing surfaces of the left and right clamps 34A, 34B. The left and right clamps 34A, 34B pass through the base 2 and protrude outward to the left and right. Abutment pieces 38 that are bent downward are provided on the left and right outer end portions of the left and right clamps 34A, 34B, respectively. When the adjustment thumbscrew 33 is rotated, the left and right clamps 34A, 34B slide in sync in opposite directions as the adjustment pinion 36 rotates, thereby expanding and contracting the distance between the left and right abutment pieces 38, 38. A pair of guide pinions 39, 39 that mesh with racks 37, 37 of the left and right clamps 34A, 34B are rotatably provided on the left and right of the adjustment thumbscrew 33 inside the housing section 31. A screw boss 40 is formed through the lid 32 on the upper side of the right clamp 34B. A fixing setscrew 35 is threaded into the screw boss 40. When the fixing setscrew 35 is screwed downward, the right clamp 34B is pressed from above, restricting its sliding. Restricting the sliding of the right clamp 34B also restricts the sliding of the left clamp 34A via the adjustment pinion 36.

[0024] In the drill stand 1A configured as described above, the shaft 13 of the drill chuck 11 is held by the drill chuck 74 of the driver drill 70 which is facing downward, as shown in FIG. When performing a drilling operation or the like in the center of a workpiece, the operator first abuts the base 2 of the drill stand 1A against the workpiece to position the drilling position within the through-hole 5. Next, the fixing setscrew 35 is loosened and the adjustment knob screw 33 is rotated to slide the left and right clamps 34A, 34B. Then, as shown in FIG. 12, the left and right abutment pieces 38, 38 are brought into abutment against the left and right side surfaces of the workpiece W. In this state, the fixing setscrew 35 is tightened to restrict the sliding of the left and right clamps 34A, 34B.

[0025] Next, the poles 3, 3 are fixed at a desired angle using the thumb screws 8, 8. Then, with the chuck unit 4 released as in Example 1, the operator grasps the grip portion 72 of the driver drill 70 and depresses the trigger 75. This rotates the drill chuck 11. If the driver drill 70 is then pushed into the workpiece W together with the chuck unit 4, the chuck unit 4 slides downward along the poles 3, 3. This allows drilling, for example, at the center of the workpiece W in the left-right direction using a drill bit or the like attached to the drill chuck 11. When the driver drill 70 is finished, the chuck unit 4 rises along the poles 3, 3 and moves away from the workpiece W. When drilling the next hole in a straight line, the left and right abutment pieces 38, 38 are slid along the side surfaces of the workpiece W while the base 2 is moved back and forth to the next drilling position. Once the next drilling position has been positioned within the through hole 5, the drilling operation is carried out in the same manner as described above. By repeating this process, multiple holes can be formed in a line at the center of the workpiece W in the left-right direction.

[0026] The drill stand 1A of the second embodiment can be attached to a driver drill 70 that includes a motor M, a housing 73 that accommodates the motor M, and a drill chuck 74 that is rotated by the motor M. The drill stand 1A also includes a base 2 that abuts against a workpiece W, and the base 2 is provided with left and right clamps 34A, 34B (an example of a guide) that can guide movement of the base 2 along the workpiece W. This configuration allows the base 2 to be easily moved linearly along the workpiece W. Therefore, when drilling holes at regular intervals in the center of the left-right direction of the workpiece W, holes can be drilled quickly and accurately, and further improvements in usability can be expected.

[0027] The guide portion is a pair of left and right clamps 34A, 34B (an example of a clamp) that protrude left and right from the base 2 and have abutment pieces 38 (an example of abutment parts) at the left and right outer ends for contact with the workpiece W, and are capable of changing the left and right positions of the abutment pieces 38. Therefore, the back and forth movement of the base 2 along the workpiece W can be accurately guided. The pair of left and right clamps 34A, 34B can change their positions in the left and right direction in unison. Therefore, the drill chuck 11 can be easily positioned at the center position in the left-right direction.

[0028] A modification of the second embodiment will now be described. The left and right clamps may be arranged in the opposite order to the above example, with the left clamp on the front side and the right clamp on the rear side. The left and right clamps are not limited to being strip-shaped, but may be rod-shaped, etc. The shape of the contact portion can also be changed as appropriate. The fixing set screw may be provided on the left clamp side instead of the right clamp side. The fixing set screw may be eliminated and the adjustment knob screw may be made rotatably lockable. A roller may be used instead of the guide pinion. The guide pinion and roller may be omitted. A slide structure other than the rack and pinion structure may also be used. In the above example, the clamp portion is provided at the rear of the base, but the clamp portion may be provided at the front of the base, or at the front and rear of the base. [Example]

[0029] FIG. 13 shows a drill stand 1B, an example of a rotary tool stand according to the second embodiment of the present disclosure. In this drill stand 1B, the base 2 has the same shape as in the first embodiment. However, the base 2 includes an extension base 45. The extension base 45 is a triangular plate in plan view, with its front end having a width approximately equal to the width of the base 2 and tapering toward the rear. As shown in FIG. 14 , the right side surface 46 of the rear portion of the extension base 45 extends in the front-to-rear direction slightly to the right of the right side surface of the base 2. The left side surface 47 of the extension base 45 extends in a right-to-left manner toward the rear. A support block 48 is provided at the rear end of the extension base 45. The support block 48 is a rectangular parallelepiped that protrudes equally in both directions from the center of the extension base 45. The front end of the extension base 45 is screwed to the top surface of the base 2. In this state, the support block 48 abuts against the top surface of the workpiece W, as shown in FIG. 15 . Therefore, the extension base 45 assumes a horizontal position parallel to the upper surface of the base 2. In this manner, the support block 48 at the rear of the base 2 abuts against the upper surface of the workpiece W, stabilizing the placement of the drill stand 1B and preventing it from tipping over.

[0030] A long hole 49 extending in the front-rear direction along the right side surface 46 is formed in the rear of the extension base 45. A reaction force receiving bar 50 is provided in the long hole 49. The reaction force receiving bar 50 is a shaft with a circular cross section that extends upward. The reaction force receiving bar 50 is fixed by two nuts 51, 51 that threadably engage with the top and bottom of the extension base 45 while passing through the long hole 49. When one of the nuts 51 is loosened, the reaction force receiving bar 50 becomes slidable along the long hole 49. When the nut 51 is tightened at any position, the sliding of the reaction force receiving bar 50 is restricted.

[0031] In the drill stand 1B configured as described above, the shaft 13 of the chuck unit 4 is held by the drill chuck 74 of the driver drill 70 facing downward, as shown in FIG. When performing drilling work, the worker first abuts the base 2 of the drill stand 1B against the workpiece W to position the drilling position within the through-hole 5. Next, the poles 3, 3 are fixed at a desired angle using the thumb screws 8, 8. Then, the reaction force receiving bar 50 is slid and fixed in place at the right side of the grip portion 72 or the battery pack 77. As in the first embodiment, the operator releases the chuck unit 4, grasps the grip portion 72 of the driver drill 70, and depresses the trigger 75. This rotates the drill chuck 11. If the driver drill 70 is then pushed into the workpiece W together with the chuck unit 4, the chuck unit 4 slides downward along the poles 3, 3. This allows drilling or the like in the workpiece W with a drill bit or the like attached to the drill chuck 11. When the driver drill 70 is finished, the operator pulls the driver drill 70 upward, and the chuck unit 4 rises along the poles 3, 3 and moves away from the workpiece W.

[0032] During this drilling operation, if the load torque applied from the drill bit or the like suddenly increases, the forward-rotating drill chuck 11, 74 and spindle become locked. This causes a counterclockwise reaction force to be applied to the driver drill 70, as viewed from above, around the spindle. This causes the grip 72 and the battery pack 77 to swing to the right. However, because the reaction force receiving bar 50 is located on the right side of the grip 72 or the battery pack 77, the grip 72 or the battery pack 77 comes into contact with the reaction force receiving bar 50, restricting the swing to the right. When performing inclined drilling by changing the angle of the poles 3, 3, the position of the battery pack 77 moves rearward as the driver drill 70 tilts, as shown in Figure 17. In this case, the reaction force receiving bar 50 is slid along the elongated hole 49 to move the mounting position in accordance with the grip part 72 or the battery pack 77. This allows the grip part 72 or the battery pack 77, which are swung to the right, to come into contact with the driver drill 70 even if a reaction force is generated.

[0033] When rotating the spindle and drill chuck 11 in the reverse direction by removing screws or the like, the reaction force receiving bar 50 is first removed from the extension base 45, and then the extension base 45 is removed from the base 2. Then, the extension base 45 is turned upside down and screwed to the base 2. Next, the reaction force receiving bar 50 is attached to the elongated hole 49 located on the left side. Then, even if a reaction force that swings the driver drill 70 in the clockwise direction in a plan view is generated during reverse rotation, the swing can be restricted by the reaction force receiving bar 50 located on the left side.

[0034] The drill stand 1B of the third embodiment can be attached to a driver drill 70 that includes a motor M, a housing 73 that houses the motor M, and a drill chuck 74 that is rotated by the motor M. The drill stand 1B is provided with a reaction force receiving bar 50 (an example of a reaction force receiving portion) that restricts rotation of the housing 73 when a reaction force caused by rotation of the drill chuck 74 is applied to the housing 73. With this configuration, even if the housing 73 of the driver drill 70 attempts to rotate due to a reaction force caused by a load torque during drilling or other operations, the rotation of the housing 73 is restricted by the reaction force receiving bar 50. This prevents work from being interrupted by unexpected rotation of the housing 73, and is expected to further improve usability.

[0035] The drill stand 1B includes a base 2 that contacts the workpiece W, and the reaction force receiving bar 50 is provided on the base 2. Therefore, the reaction force receiving bar 50 can be installed stably, and the rotation of the housing 73 can be reliably restricted. The reaction force receiving bar 50 is a shaft that protrudes upward from the base 2 and is located on the side of the housing 73 that rotates due to the reaction force. Therefore, the reaction force receiving portion can be easily formed.

[0036] The housing 73 has a grip portion 72 that extends rearward with the drill chuck 74 facing downward, and the reaction force receiving bar 50 restricts the rotation of the grip portion 72. Therefore, rotation can be restricted at a position away from the drill chuck 74 to which the load torque is applied and where the reaction force is small, and the reaction force receiving bar 50 can be formed compactly. The reaction force receiving bar 50 is provided so that its position in the front-rear direction can be changed. Therefore, the reaction force receiving bar 50 can be installed in an optimum position according to the posture of use of the driver drill 70, etc. The base 2 includes a detachable extension base 45 that extends rearward, and the reaction force receiving bar 50 is provided on the extension base 45. Therefore, the reaction force receiving bar 50 can be easily added to the existing base 2. In addition, the extension base 45 increases the stability of the base 2, and provides an effect of preventing it from falling over.

[0037] A modification of the third embodiment will now be described. The reaction force receiving portion is not limited to the reaction force receiving bar in the above example. The reaction force receiving portion may be plate-shaped or cylindrical, and multiple reaction force receiving portions may be provided. The reaction force receiving portion may be expandable and contractible in the vertical direction. The reaction force receiving portion may be provided so that its left and right position can be changed independently. The extension base is not limited to a triangular shape in plan view, and may have other shapes such as a rectangular shape in plan view. The extension base may be slidably connected to the base so that it can be pulled out as desired. In this case, the reaction force receiving part may be connected to the extension base so that it can rise and fall. The extension base may be omitted. In this case, the reaction force receiving portion may be provided on the base or at a location other than the base. [Example]

[0038] In the drill stand 1C shown in Fig. 18, the base 2 is divided into two parts, a front part and a rear part, in front of the support plates 6, 6. As shown in Fig. 19, the base 2 is structured to include a rear main body base 55 that is U-shaped in plan view and to which the poles 3, 3 are connected, and a front divided base 56 that is U-shaped in plan view and faces the main body base 55. The left and right ends of the front of the main body base 55 are rectangular cylindrical receiving portions 57, 57 that open forward. The left and right ends of the rear of the split base 56 are rectangular cylindrical insertion portions 58, 58 that fit into the receiving portions 57, 57 of the main body base 55. On the left and right sides of the front top surface of the split base 56, protrusions 59, 59 that are rectangular in plan view and face upward are formed. These protrusions 59, 59 can also fit into the receiving portions 57, 57 of the main body base 55.

[0039] Therefore, the split base 56 can be used in either a first mounting mode in which the insertion portions 58, 58 are fitted into the receiving portions 57, 57 in a horizontal position, or a second mounting mode in which the protrusions 59, 59 are fitted into the receiving portions 57, 57 in a vertical position. In the first mounting mode, as shown in Figures 18 and 20, the split base 56 is connected continuously to the main base 55, and the base 2 is flat. In the second mounting mode, as shown in Figure 21, the split base 56 is connected facing upward, and the base 2 is L-shaped in a side view. Therefore, the base 2 has the longest length in the front-to-rear direction when the divided base 56 is connected horizontally to the main base 55. The base 2 has the shortest length in the front-to-rear direction when the divided base 56 is removed and only the main base 55 remains. When the divided base 56 is connected vertically to the main base 55, the base 2 has an intermediate length in the front-to-rear direction that is shorter than the longest length and longer than the shortest length.

[0040] In the drill stand 1C configured as described above, in the first mounting mode of the base 2, the shaft 13 of the chuck unit 4 is held by the drill chuck 74 of the driver drill 70 facing downward, as shown in Fig. 20. Then, by sliding the driver drill 70 together with the chuck unit 4 toward the workpiece in the same manner as in the above-described Examples 1 to 3, it becomes possible to drill a hole in the workpiece with a drill bit or the like. If the drilling position is near a wall or the like and the base 2 would get in the way in the first mounting mode, the base 2 is mounted in the second mounting mode shown in Figure 21. This sets the base 2 to an intermediate length, allowing the base 2 to be positioned at the drilling position without interference even if there is a wall W1 or the like in front of it. This makes drilling work near a wall (also known as edge drilling or corner drilling) possible. In this case, the split base 56 in the vertical position can be slid left and right along the wall W1 and used as a guide. Furthermore, if the split base 56 gets in the way even in the second mounting mode, the split base 56 can be removed as shown in Figure 22. Then, the base 2 will have the shortest length consisting of only the main body base 55. Therefore, the main body base 55 can be positioned at the drilling position by moving it close to the wall W2 of the stepped portion, etc. In this case, too, the main body base 55 can be used as a guide by sliding it left and right along the wall W2.

[0041] The drill stand 1C of the fourth embodiment described above can be attached to a driver drill 70 that includes a motor M, a housing 73 that accommodates the motor M, and a drill chuck 74 that is rotated by the motor M. The drill stand 1C also includes a base 2 that contacts the workpiece W, and the base 2 includes a main base 55 and a divided base 56 that is detachable from the main base 55. The base 2 can be selected between a maximum length in which the divided base 56 is attached to the main base 55, and a minimum length in which the divided base 56 is removed and only the main base 55 remains. With this configuration, the length of the base 2 can be adjusted to suit the working space, and drilling work can be performed without hindrance even near a wall. Therefore, further improvements in usability can be expected.

[0042] The divided base 56 can be attached to the main body base 55 by selecting either a first attachment mode that results in the longest length or a second attachment mode that results in an intermediate length that is shorter than the longest length and longer than the shortest length. Therefore, the length of the base 2 can be further selected, and usability is further improved.

[0043] Next, a modification of the fourth embodiment will be described. In the above example, the main base has a receiving portion and the split base has an insert portion, but the reverse may be true: the main base has an insert portion and the split base has a receiving portion. One receiving portion and one insert portion may be provided on each base, and they may be fitted together alternately. The protrusions on the split base may also be recessed to match the main base. In the above example, the front side of the base has a split structure, but the rear side of the base may also have a split structure, or the front and rear of the base may each have a split structure. The divided structure of the base of the fourth embodiment can also be adopted for the bases of the first to third embodiments. For example, in the above-mentioned Example 1, when the parallel ruler is T-shaped and connected to the front or rear part of the base, the divided structure of Example 4 can be adopted for the rear or front part of the base. In the above-described second embodiment, if the clamping portion is located at the rear of the base, the divided structure of the fourth embodiment can be adopted for the front portion. If the clamping portion is located at the front of the base, the divided structure of the fourth embodiment can be adopted for the rear portion. In the third embodiment, the divided structure of the fourth embodiment can be adopted in the front part of the base.

[0044] In addition, in common with each embodiment, the rotary tool is not limited to a driver drill. The present disclosure can also be applied to other rotary tools, such as an electric drill, a percussion drill, a percussion driver drill, and an impact driver. In particular, for impact drivers, using the drill stand has the advantage of reducing the occurrence of cam-out (the phenomenon in which the bit lifts off the screw during rotation). The rotary tool does not have to have a grip portion protruding perpendicularly from the main body, but may have a main body and a grip portion connected in a straight line. The rotary tool may not be a rechargeable type, but may be an AC machine that uses a commercial power source. In each embodiment, the case where the drill stand is used with its base facing downward is described, but the present disclosure does not exclude modes of use in which the drill stand is turned sideways with its base abutting against a wall, or the drill stand is turned upward with its base abutting against a ceiling or the like. [Explanation of symbols]

[0045] 1, 1A, 1B, 1C... drill stand, 2... base, 3... pole, 4... chuck unit, 5... through hole, 6... support plate portion, 11, 74... drill chuck, 12... holding tube, 13... shaft, 20... parallel ruler, 21... slide plate, 22... abutment plate, 23... bent piece, 30... clamp portion, 31... accommodation portion, 33... adjustment knob screw, 34A... left clamp, 34B... right clamp , 35··Fixing set screw, 38··Abutment piece, 45··Extension base, 48··Support block, 50··Reaction force receiving bar, 55··Main body base, 56··Split base, 57··Receiving part, 58··Insertion part, 59··Protrusion, 70··Driver drill, 71··Main body, 72··Grip part, 73··Housing, 76··Battery mounting part, 77··Battery pack, W··Workpiece, W1, W2··Wall.

Claims

1. A rotary tool stand that can be attached to a rotary tool including a motor, a housing that accommodates the motor, and a tool bit holder that is rotated by the motor, The workpiece includes a base that contacts the workpiece, and the base is provided with a guide portion that can guide movement of the base along the workpiece, A pole is connected to the base, and a coupling unit to which the rotary tool can be coupled is provided on the pole so as to be movable along the pole.

2. A stand for rotary tools as described in claim 1, wherein the connecting unit is provided with a knob screw that can fix the connecting unit at any position along the pole.

3. A rotary tool stand that can be attached to a rotary tool including a motor, a housing that accommodates the motor, and a tool tip holder that is rotated by the motor, The workpiece includes a base that contacts the workpiece, and the base is provided with a guide portion that can guide movement of the base along the workpiece, A pole is connected to the base, and a drill chuck capable of holding the tool tip holder is provided on the pole so as to be movable along the pole.

4. 4. The rotary tool stand according to claim 1, wherein the guide portion is a parallel ruler that protrudes from the base to either the left or right and has an abutment portion for contacting the workpiece in the front-to-rear direction when the direction in which the base moves along the workpiece is defined as the front-to-rear direction, and the position of the abutment portion in the front-to-rear direction can be changed.

5. 5. The rotary tool stand according to claim 4, wherein the parallel ruler is removable from the base.

6. A rotary tool stand that can be attached to a rotary tool including a motor, a housing that accommodates the motor, and a tool tip holder that is rotated by the motor, The workpiece includes a base that contacts the workpiece, and the base is provided with a guide portion that can guide movement of the base along the workpiece, The guide portion is a stand for rotary tools that protrudes to the left and right from the base as a center when the direction of movement of the base along the workpiece is the front-to-back direction, and has abutment portions for contacting the workpiece at the left and right outer ends, and is a pair of clamps whose left-to-right positions can be changed in unison.

7. 7. The rotary tool stand according to claim 6, wherein a pole is connected to the base, and a drill chuck capable of holding the tool bit holder is provided on the pole so as to be movable along the pole.

8. 8. The rotary tool stand according to claim 7, wherein the poles are provided in pairs, and the drill chuck is disposed between the pair of poles.

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