Patent Publication Number: US-2023150108-A1

Title: Rotary tool, rotary tool stand, and rotary tool including rotary tool stand

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of priority to Japanese Patent Application No. 2021-188101, filed on Nov. 18, 2021, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a rotary tool such as a driver drill, a rotary tool stand to support the rotary tool, and a rotary tool including a rotary tool stand. 
     2. Description of the Background 
     In an operation such as drilling using a rotary tool such as a driver drill, a rotary tool stand may be used. An example rotary tool stand described in Japanese Unexamined Patent Application Publication No. 2002-160110 includes a base placeable on a workpiece, a strut standing upward from the base, and a drill clamp attached to the strut in a vertically movable manner. The drill clamp can receive a body of a rotary tool, such as an electric drill, fastened to it with bolts. In response to a vertical operation on an operation lever included in the drill clamp, the rotary tool is vertically movable together with the drill clamp. 
     BRIEF SUMMARY 
     A known rotary tool stand uses a drill clamp to connect a rotary tool. This increases the weight of the rotary tool stand, causing poor handling. Such a rotary tool stand also takes labor and time for attachment or detachment of the rotary tool, possibly deteriorating workability. 
     One or more aspects of the present disclosure are directed to a rotary tool that allows easy attachment and detachment of a rotary tool stand, a rotary tool stand that allows easy attachment and detachment of the rotary tool and weighs less, and a rotary tool including a rotary tool stand that allows easy attachment and detachment between the rotary tool and the rotary tool stand and weighs less. 
     A first aspect of the present disclosure provides a rotary tool, including: 
     a motor; 
     a housing accommodating the motor; 
     a tip tool holder rotatable by the motor; and 
     a connecting member held on the housing, the connecting member having at least one connecting hole through which a pole is placeable, the pole extending from a base included in a rotary tool stand, the base being placeable on a workpiece. 
     A second aspect of the present disclosure provides a rotary tool stand, including: 
     a base placeable on a workpiece; and 
     a pole extending from the base, the pole being placeable through the at least one connecting hole in the rotary tool. 
     A third aspect of the present disclosure provides a rotary tool including a rotary tool stand, the rotary tool including: 
     the rotary tool; 
     a base placeable on a workpiece; and 
     a pole extending from the base, the pole being placeable through the at least one connecting hole in the rotary tool. 
     A fourth aspect of the present disclosure provides a rotary tool, including: 
     a motor; 
     a spindle rotatable by the motor; and 
     a housing accommodating the motor, the housing including an engaging portion engageable with or disengageable from a receiving portion located in a tip tool holder couplable to the spindle, the tip tool holder being included in a rotary tool stand and placeable on a workpiece. 
     A fifth aspect of the present disclosure provides a rotary tool stand, including: 
     a base placeable on a workpiece; and 
     a tip tool holder connected to the base, the tip tool holder including 
     a joint couplable to the spindle in the rotary tool, and 
     a receiving portion engageable with or disengageable from the engaging portion in the rotary tool. 
     A sixth aspect of the present disclosure provides a rotary tool including a rotary tool stand, the rotary tool including: 
     the rotary tool; 
     a base placeable on a workpiece; and 
     a tip tool holder connected to the base, the tip tool holder including
         a joint couplable to the spindle in the rotary tool, and   the receiving portion engageable with or disengageable from the engaging portion in the rotary tool.       

     The rotary tool according to the above aspects of the present disclosure allows easy attachment and detachment of the rotary tool stand, thus improving workability. 
     The rotary tool stand according to the above aspects of the present disclosure allows easy attachment and detachment of the rotary tool and weighs less. 
     The rotary tool including a rotary tool stand according to the above aspects of the present disclosure allows easy attachment and detachment between the rotary tool and the rotary tool stand, thus improves workability and weighs less. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a perspective view of a rechargeable driver drill including a drill stand according to a first embodiment. 
         FIG.  2    is an exploded perspective view of the rechargeable driver drill including the drill stand according to the first embodiment. 
         FIG.  3    is a side view of the rechargeable driver drill including the drill stand according to the first embodiment. 
         FIG.  4    is a cross-sectional view taken along line A-A in  FIG.  3   . 
         FIG.  5    is a perspective view of a rechargeable driver drill including a drill stand according to a second embodiment. 
         FIG.  6    is a perspective view of the rechargeable driver drill according to the second embodiment as viewed from below. 
         FIG.  7    is an exploded perspective view of the drill stand according to the second embodiment as viewed from above. 
         FIG.  8    is a side view of the rechargeable driver drill including the drill stand according to the second embodiment. 
         FIG.  9    is a cross-sectional view taken along line B-B in  FIG.  8   . 
     
    
    
     DETAILED DESCRIPTION 
     First Embodiment 
     Embodiments of the present disclosure will now be described with reference to the drawings. 
       FIG.  1    is a perspective view of a rechargeable driver drill (hereafter, simply a driver drill)  1  as an example of a rotary tool. The driver drill  1  includes a drill stand  30  as an example of a rotary tool stand, which is connected to the driver drill  1 .  FIG.  2    is an exploded perspective view of the driver drill  1  including the drill stand  30 .  FIG.  3    is a side view of the driver drill  1  including the drill stand  30 . The front, rear, right, left, upper, and lower directions are hereafter defined with respect to the driver drill  1  facing downward with the drill stand  30  including a base  31  at the bottom. 
     The driver drill  1  includes a body  2  and a grip  3 . The body  2  extends vertically. 
     The grip  3  extends rearward from the body  2 . As shown in  FIG.  4   , the body  2  includes a cylindrical housing  4  accommodating a motor  5  and an output unit  6 . The housing  4  includes, at its lower end, an operation ring  7  for switching a clutch. The output unit  6  includes a spindle  8  protruding downward from the lower end of the housing  4 . A drill chuck  9  is integrally attached to the lower end of the spindle  8 . 
     The grip  3  is integral with the housing  4 . The grip  3  includes a switch (not shown). The switch includes a trigger  10  protruding downward from the grip  3 . A battery mount  11  is located at the rear of the grip  3 . The battery mount  11  receives a battery pack  12 . 
     A side handle  15  is attached to the body  2 . The side handle  15  includes a holder  16  and a rod  17 . The holder  16  includes a pair of right and left holding tabs  18 . The holding tabs  18  hold the housing  4 , above the operation ring  7 , to connect the holder  16  and the housing  4  together. The rod  17  extends leftward from the holder  16 . A grip  19  is located at the left end of the rod  17 . 
     The holder  16  includes a pair of extensions  20  at its right and left ends. Each extension  20  has a connecting hole  21  vertically extending through it. The connecting hole  21  has a circular cross section. The connecting holes  21  are at laterally symmetrical positions about an axis of the body  2 . 
     The drill stand  30  includes the base  31  and a pair of poles  32 . The base  31  is rectangular as viewed in plan. The base  31  has, at its center, a through-hole  33  elongated in the front-rear direction. The base  31  includes a pair of holding plates  34  extending upward from its upper right and upper left surfaces. 
     Each pole  32  includes a connecting plate  35  at its lower end. The pole  32  has a circular cross section in its upper portion excluding the lower end. The connecting plates  35  are located laterally outside the holding plates  34 . The connecting plate  35  are connected to the corresponding holding plates  34  with knob screws  36  laterally from outside. Thus, each pole  32  is rotatable about a threaded portion  37  of the knob screw  36  in the front-rear direction in response to the corresponding knob screw  36  being loosened. The pole  32  can be fastened at an intended angle in response to the knob screw  36  being tightened. The pole  32  receives a cylindrical stopper  38  above the connecting plate  35 . 
     The interval between the right and left poles  32  is the same as the interval between the right and left connecting holes  21  in the side handle  15 . With the poles  32  placed through the connecting holes  21  from below, the side handle  15  and the driver drill  1  are vertically movable along the poles  32 . Each pole  32  receives a cap  39  on its distal end. The cap  39  prevents the side handle  15  from slipping off upward. 
     In the driver drill  1  and the drill stand  30  according to the present embodiment, the poles  32  in the drill stand  30  are placed through the connecting holes  21  in the side handle  15  and receive the caps  39  at their distal ends. The drill stand  30  is thus attached to the side handle  15  in a manner vertically movable relative to the side handle  15  along the poles  32 . The holder  16  in the side handle  15  is in contact with the stoppers  38  at the lowermost position of the driver drill  1 . The holder  16  is in contact with the caps  39  at the uppermost position of the driver drill  1 . 
     To perform an operation such as drilling, an operator first places the base  31  in the drill stand  30  against a workpiece and aligns the through-hole  33  with a drilling target position. 
     The operator then fastens the poles  32  at an intended angle with the knob screws  36 . This angle defines the drilling direction. In this state, the operator presses the trigger  10  while holding the grip  3  in the driver drill  1  and the grip  19  in the side handle  15 . This drives the motor  5  to rotate the spindle  8  in the output unit  6 , rotating the drill chuck  9  together with the spindle  8 . In this state, the operator pushes the driver drill  1  downward together with the side handle  15  to cause the driver drill  1  to slide downward along the poles  32 . This allows a drill bit attached to the drill chuck  9  to, for example, drill a workpiece. Upon completion of the operation, the operator pulls the driver drill  1  upward to cause the driver drill  1  to slide upward along the poles  32  together with the side handle  15 . The driver drill  1  is then separate from the workpiece. 
     When not using the drill stand  30 , the operator removes the caps  39  from the poles  32 , and then removes the poles  32  from the connecting holes  21  in the side handle  15 . This detaches the drill stand  30  from the side handle  15 . 
     The driver drill  1  (an example of a rotary tool) according to the first embodiment includes the motor  5 , the housing  4  accommodating the motor  5 , the drill chuck  9  (an example of a tip tool holder) rotatable by the motor  5 , and the side handle  15  (an example of a connecting member) held on the housing  4 . The side handle  15  has the connecting holes  21 . The drill stand  30  includes the base  31  placeable on a workpiece, and the poles  32  extending from the base  31 . The poles  32  are placeable through the connecting holes  21 . This structure allows easy attachment and detachment of the drill stand  30  using the connecting holes  21  and the poles  32 , thus improving workability. 
     The drill stand  30  includes multiple poles  32 . The side handle  15  has multiple connecting holes  21 . 
     This allows stable connection between the driver drill  1  and the drill stand  30 . This also allows stable movement of the driver drill  1  relative to the poles  32 . 
     A connecting member is the side handle  15  to hold the housing  4 . 
     An existing side handle  15  can be used to connect the drill stand  30 , reducing the number of components. 
     The drill stand  30  includes a pair of poles  32 . The holder  16  in the side handle  15  to hold the housing  4  has a pair of connecting holes  21 . 
     This allows well-balanced connection between the side handle  15  and the poles  32 . 
     The drill stand  30  (an example of a rotary tool stand) according to the first embodiment includes the base  31  placeable on a workpiece, and the poles  32  extending from the base  31 . The poles  32  are placeable through the connecting holes  21  in the driver drill  1 . 
     This structure allows easy attachment and detachment of the driver drill  1  simply by placing or removing the poles  32  through or from the connecting holes  21 . This structure eliminates separate components such as a known drill clamp and thus weighs less. 
     The poles  32  each have an angle adjustable relative to the base  31 . 
     This allows easy handling with the angle suitably adjusted for an operation. 
     In the driver drill  1  including the drill stand  30  (an example of a rotary tool including a rotary tool stand) according to the first embodiment, the driver drill  1  is movable along the poles  32  in the drill stand  30 . The poles  32  are placed through the connecting holes  21  in the driver drill  1 . 
     This structure allows easy attachment and detachment between the driver drill  1  and the drill stand  30 , thus improving workability. The driver drill  1  including the drill stand  30  also weighs less and is thus easy to handle. 
     The first embodiment may be modified as described below. 
     The poles and the connecting holes each may have a cross section other than a circular cross section. For example, the poles and the connecting holes each may have a rectangular or a hexagonal cross section. The connecting holes may be located at different positions as appropriate. 
     The connecting holes may receive bearings on their inner peripheral surfaces to support the corresponding poles, rather than being simple through-holes. 
     More or fewer poles and more or fewer connecting holes than in the examples may be used as appropriate. For example, one pole and one connecting hole may support the side handle in a cantilevered manner. 
     The stoppers attached to the poles may be eliminated. 
     The angles of the poles may not be adjustable. The base may have a different shape as appropriate. 
     The side handle is not limited to the shape in the above example. For example, the holder may be a ring rather than the pair of tabs. The rod may be a separate component attachable to and detachable from the holder. 
     The connecting member having the connecting holes is not limited to the side handle in the above example. For example, an adapter for collecting dust, or an adapter for adjusting the depth to which processing is performed may be used as the connecting member. 
     The housing with the connecting holes in it may also be used as the connecting member. 
     A connecting member without any additional function, unlike the side handle, may be used. The connecting member may have connecting holes to be used for fastening to the housing. 
     Second Embodiment 
     A second embodiment will now be described. The same components as in the first embodiment are given the same reference numerals and will not be described repeatedly. 
       FIG.  5    is a perspective view of a driver drill  1 A including a drill stand  30 A. As shown in  FIG.  6   , the driver drill  1 A has a hexagonal hole  25  at the lower end of the spindle  8 . The spindle  8  receives no drill chuck at its lower end. The housing  4  includes, at its lower end, an upper cylindrical portion  26 . The upper cylindrical portion  26  opens downward with the spindle  8  at its center. The upper cylindrical portion  26  has a pair of outer engagement tabs  27  on its lower outer circumferential surface. The outer engagement tabs  27  are located point-symmetric to each other about the axis of the upper cylindrical portion  26 . Each outer engagement tab  27  extends radially outward from the upper cylindrical portion  26 , and extends in the circumferential direction of the upper cylindrical portion  26 . 
     As shown in  FIG.  7   , the drill stand  30 A includes a chuck unit  45 . The chuck unit  45  includes a drill chuck  46 , a holding cylinder  47 , and a lower cylindrical portion  48 . The drill chuck  46  can receive, for example, a drill bit at its lower end, similarly to the drill chuck  9  in the first embodiment. The drill chuck  46  is integral with a hexagonal shaft  49  protruding upward from its center. 
     The holding cylinder  47  is located between the poles  32 . The holding cylinder  47  holds, at its lateral middle, the drill chuck  46  in a rotatable manner. The drill chuck  46  faces downward. The holding cylinder  47  includes, at its right and left, a pair of wings  50  extending laterally. The wings  50  are each integral with, at their right or left end, a guide cylinder  51 . The poles  32  extend through the guide cylinders  51 . As shown in  FIG.  8   , the right guide cylinder  51  receives a knob screw  52  screwed from the rear. The chuck unit  45  can be fastened at any position along the poles  32  with the knob screw  52  being tightened. 
     The lower cylindrical portion  48  at the upper end of the holding cylinder  47  is rotatable about the hexagonal shaft  49 . The lower cylindrical portion  48  has an inner diameter large enough to receive the upper cylindrical portion  26  of the driver drill  1 A fitted in it, including the outer engagement tabs  27 . The lower cylindrical portion  48  has a pair of inner engagement tabs  53  on its upper inner circumferential surface. The inner engagement tabs  53  are located point-symmetric to each other about the axis of the lower cylindrical portion  48 . Each inner engagement tab  53  extends radially inward from the lower cylindrical portion  48 , and extends in the circumferential direction of the lower cylindrical portion  48 . With the inner engagement tabs  53  circumferentially aligned with the outer engagement tabs  27  on the upper cylindrical portion  26 , the inner engagement tabs  53  are vertically in contact with the outer engagement tabs  27 . This obstructs fitting of the upper cylindrical portion  26  into the lower cylindrical portions  48 . With the inner engagement tabs  53  circumferentially displaced from the outer engagement tabs  27 , the inner engagement tabs  53  on the lower cylindrical portion  48  receive the outer engagement tabs  27  between them. This fits the upper cylindrical portion  26  in the lower cylindrical portion  48 . 
     The right and left poles  32  receive a pair of stopper rings  55  between the stoppers  38  and the chuck unit  45 . Each stopper ring  55  receives a knob screw  56  screwed from the rear. The stopper ring  55  can be fastened at any position along the pole  32  with the knob screw  56  being tightened. The positions of the stopper rings  55  can be vertically adjusted to determine the lowermost position at which the chuck unit  45  comes in contact with the stopper rings  55 . 
     To connect the driver drill  1 A to the drill stand  30 A in the present embodiment, the knob screw  52  in the guide cylinder  51  and the knob screws  56  in the stopper rings  55  are tightened first. This restricts vertical movement of the chuck unit  45 . 
     The lower cylindrical portion  48  of the chuck unit  45  is then rotated to a position at which the outer engagement tabs  27  and the inner engagement tabs  53  are not in contact with each other. In this state, the upper cylindrical portion  26  of the driver drill  1 A is fitted in the lower cylindrical portion  48 . At the same time, the hexagonal shaft  49  in the drill chuck  46  is fitted in the hexagonal hole  25  in the spindle  8  to couple the drill chuck  46  and the spindle  8  together. 
     The lower cylindrical portion  48  is then rotated to a position at which the outer engagement tabs  27  and the inner engagement tabs  53  are in contact with each other. As shown in  FIG.  9   , the upper cylindrical portion  26  and the lower cylindrical portion  48  are coaxially bayonet-connected to each other, and are prevented from slipping off from each other. Thus, the drill stand  30 A is attached to the housing  4  with the chuck unit  45  in a manner vertically movable relative to the housing  4 . 
     To perform an operation such as drilling, an operator first places the base  31  in the drill stand  30 A against a workpiece and aligns the through-hole  33  with a drilling target position. The operator then fastens the poles  32  at an intended angle with the knob screws  36 . The operator then loosens the knob screw  52  in the guide cylinder  51  and the knob screws  56  in the stopper rings  55 . In this state, the operator presses the trigger  10  while holding the grip  3  in the driver drill  1 A. This drives the motor  5  to rotate the spindle  8 , rotating the drill chuck  46  together with the spindle  8  with the hexagonal shaft  49  between them. In this state, the operator pushes the driver drill  1 A together with the chuck unit  45  toward the workpiece to cause the chuck unit  45  to slide downward along the poles  32 . This allows a drill bit attached to the drill chuck  46  to, for example, drill the workpiece. Upon completion of the operation, the operator pulls the driver drill  1 A upward to cause the chuck unit  45  to slide upward along the poles  32 . The driver drill  1 A is then separate from the workpiece. 
     When not using the drill stand  30 A, the operator rotates the lower cylindrical portion  48  to release the bayonet connection between the lower cylindrical portion  48  and the upper cylindrical portion  26 . The operator then removes the upper cylindrical portion  26  of the housing  4  from the lower cylindrical portion  48  and detaches the spindle  8  from the hexagonal shaft  49 . This detaches the drill stand  30 A from the driver drill  1 A. 
     The driver drill  1 A (an example of a rotary tool) according to the second embodiment includes the motor  5 , the housing  4  accommodating the motor  5 , and the spindle  8  rotatable by the motor  5 . The housing  4  includes the outer engagement tabs  27  (examples of an engaging portion) engageable with or disengageable from the inner engagement tabs  53  (examples of a receiving portion) located in the chuck unit  45  (an example of a tip tool holder). The drill stand  30 A includes the base  31  placeable on a workpiece, and the chuck unit  45  connected to the base  31  and couplable to the spindle  8 . 
     This structure allows easy attachment and detachment of the drill stand  30 A using the outer engagement tabs  27  and the inner engagement tabs  53 , thus improving workability. 
     The outer engagement tabs  27  are engageable with or disengageable from the inner engagement tabs  53  through the bayonet connection. 
     Thus, the housing  4  can be easily engaged with or disengaged from the chuck unit  45  with a single operation. 
     The housing  4  includes the upper cylindrical portion  26  (an example of a first cylindrical portion). The outer engagement tabs  27  are located in the upper cylindrical portion  26 . The chuck unit  45  includes the lower cylindrical portion  48  (an example of a second cylindrical portion) fittable with the upper cylindrical portion  26 . The inner engagement tabs  53  are located in the lower cylindrical portion  48 . With the upper cylindrical portion  26  being fitted in the lower cylindrical portion  48 , the lower cylindrical portion  48  is rotated to engage or disengage the outer engagement tabs  27  with or from the inner engagement tabs  53 . 
     This allows the stable bayonet connection, together with the cylindrical portions  26  and  48  fitted to each other. 
     The drill stand  30 A (an example of a rotary tool stand) according to the second embodiment includes the base  31  placeable on a workpiece, and the chuck unit  45  connected to the base  31 . The chuck unit  45  includes the hexagonal shaft  49  (an example of a joint) couplable to the spindle  8  in the driver drill  1 A, and the inner engagement tabs  53  engageable with or disengageable from the outer engagement tabs  27  located in the housing  4  in the driver drill  1 A. 
     This structure allows easy attachment and detachment of the driver drill  1 A simply by engaging or disengaging the inner engagement tabs  53  with or from the outer engagement tabs  27 . This structure eliminates separate components such as a known drill clamp and thus weighs less. 
     The poles  32  are connected to the base  31 . The chuck unit  45  is movable along the poles  32 . 
     The driver drill  1 A connected to the chuck unit  45  is thus easily movable together with the chuck unit  45 . 
     The multiple poles  32  are connected to the base  31 . The chuck unit  45  is movable along the multiple poles  32 . 
     The driver drill  1 A can thus move stably relative to the poles  32 . 
     The pair of poles  32  are connected to the base  31 . The chuck unit  45  is located between the pair of poles  32 . 
     The driver drill  1 A connected to the chuck unit  45  is thus supported in a well-balanced manner together with the chuck unit  45  and is stably movable. 
     The tip tool holder includes the drill chuck  46 . The joint couplable to the spindle  8  is the hexagonal shaft  49  (an example of a shaft) rotatable together with the drill chuck  46 . 
     The drill chuck  46  can thus be easily coupled to the spindle  8 . 
     In the driver drill  1 A including the drill stand  30 A (an example of rotary tool including a rotary tool stand) according to the second embodiment, the outer engagement tabs  27  in the driver drill  1 A are engaged with the inner engagement tabs  53  in the drill stand  30 A, and the spindle  8  in the driver drill  1 A is couplable to the hexagonal shaft  49  in the drill stand  30 A. 
     This structure allows easy attachment and detachment between the driver drill  1 A and the drill stand  30 A, thus improving workability. The driver drill  1 A including the drill stand  30 A also weighs less and is thus easy to handle. 
     The second embodiment may be modified as described below. 
     The fitting relationship between the upper cylindrical portion and the lower cylindrical portion may be reversed with respect to the fitting relationship described above. In other words, the lower cylindrical portion may be fitted in the upper cylindrical portion. The positional relationship between the outer engagement tabs and the inner engagement tabs may be changed in accordance with this fitting relationship. The upper cylindrical portion, rather than the lower cylindrical portion, may be rotatable. 
     The shape and the circumferential length of each engagement tab, and the number of the engagement tabs may be changed as appropriate. 
     The engaging portion and the receiving portion are not limited to the engagement tabs in the above example. For example, the coupling between the engaging portion and the receiving portion may be bayonet connection using one of the engaging portion or the receiving portion as a projection and the other as an L-shaped groove or a slit to receive the projection. 
     The engagement between the engaging portion and the receiving portion may have a structure other than the bayonet connection. 
     The coupling between the spindle and the joint in the drill chuck is not limited to the coupling between the hexagonal hole and the hexagonal shaft in the above example. For example, the hexagonal hole and the hexagonal shaft may be reversely located. The spindle and the joint may include cam teeth, which engage with each other in the rotation direction. 
     The drill stand may be modified as appropriate. 
     For example, the chuck unit may be fastened with the right and left knob screws. The knob screws may be eliminated. 
     The drill chuck in the chuck unit may be attachable to and detachable from the chuck unit. In this case as well, for example, the holding cylinder and the chuck unit may be bayonet-connected to each other to be attachable with and detachable from each other with a single operation. The detached drill chuck may be bayonet-connected to the driver drill to be usable. 
     Either of the stopper rings alone may be used. The stopper rings may be eliminated. 
     The pole may have a cross section in any shape as appropriate as in the first embodiment. 
     A single pole may be used. The angles of the poles may not be adjustable. 
     The stoppers attached to the poles may be eliminated. The base may be shaped differently as appropriate. 
     In the above embodiments, the rotary tool is not limited to the driver drill. The present disclosure is applicable to, for example, an electric drill, a vibration drill, a vibration driver drill, and other rotary tools. 
     In the rotary tool, the grip may not protrude orthogonally from the body. In the rotary tool, the grip may be, for example, linearly connected to the body. 
     The rotary tool may be powered by alternating current (AC), or utility power, rather than by a rechargeable battery. 
     In each embodiment, the drill stand is used with the base placed at the bottom. However, in the present disclosure, the drill stand may face horizontally with the base placed on a wall, or may face upward with the base placed on, for example, a ceiling. 
     REFERENCE SIGNS LIST 
       1 ,  1 A rechargeable driver drill
   2  body
 
 3  grip
 
 4  housing
 
 5  motor
 
 6  output unit
 
 8  spindle
 
 9 ,  46  drill chuck
 
 15  side handle
 
 16  holder
 
 17  rod
 
 18  holding tab
 
 20  extension
 
 21  connecting hole
 
 25  hexagonal hole
 
 26  upper cylindrical portion
 
 27  outer engagement tab
 
 30 ,  30 A drill stand
 
 31  base
 
 32  pole
 
 36 ,  52 ,  56  knob screw
 
 45  chuck unit
 
 47  holding cylinder
 
 48  lower cylindrical portion
 
 49  hexagonal shaft
 
 53  inner engagement tab