JP3807445B2 - Portable tools - Google Patents

Description

  The present invention relates to a portable tool having a hook portion that can be hooked on an operator's waist belt or the like.

  A conventional power tool is provided with a hook portion for hooking the power tool on an operator's waist belt or the like. If this hook part is fixedly arranged in a state of protruding from the electric power tool body, for example, the hook part comes into contact with surrounding members and the like during work. In particular, when working in a narrow place, there is a problem that the hook portion becomes an obstacle and the workability is lowered. In addition, since it obstructs the work, there is a problem that the hook part is lost if the hook part is configured to be detachable as necessary. Therefore, when the hook portion is not required, the hook portion is movably provided up to a position where the hook portion is housed in the electric tool or does not interfere with the work.

  An example of the hook portion described above will be described with reference to FIG. A hook 4 in which a soft material 3 is coated on the entire periphery of a hook piece 2 formed by bending rod-shaped iron that is threaded, a holding nut 5 that holds the hook 4, and a housing 1 that prevents the hook 4 from coming off. It consists of a retaining nut (not shown) provided inside. The hook piece 2 of the hook portion can be rotated from a storage position substantially adjacent to the battery 18 to a gap formed between the hook piece 2b and the handle 9, as shown by a two-dot broken line, and this position. It protrudes so that it can be hooked. Further, since the stability can be obtained by hooking the hook with the belt or the like with the tip of the hook directed toward the center of gravity, the hook piece is removed even if the connecting screw attachment 7 is removed from the power tool body and the position of the center of gravity of the power tool changes. By rotating 2b, it can be adjusted to a stable position. Further, since the hook hook piece is often projected to the side most, even if the hook is covered with the soft material 3, the soft material 3 is placed on an inclined surface such as a roof where the electric tool is inclined. The anti-slip action works as well as the protective action so that the soft material 3 does not damage the member when the electric tool is placed on the member such as a decorative board.

  Also, as disclosed in Japanese Patent Application Laid-Open No. 2000-167785, there is a type in which the entire hook is slidably housed in a recess provided in the power tool body from a state in which the hook portion is protruded and fixed.

  Further, although not the above-described storage type, as an example of easily moving the hook portion, as disclosed in Japanese Patent Laid-Open No. 6-285774, it rotates around the outer periphery of a substantially cylindrical motor housing of the electric tool. There is also a hook that can be positioned at a plurality of locations by locking the hook portion.

  Further, as disclosed in JP-A-9-225861, a rotary hook portion provided with a convex portion or a concave portion that can be fitted to the left side surface of the motor housing provided with a convex portion or a concave portion is provided. Some hooks can be attached and detached with a single touch.

  On the other hand, tip tools such as bits are easily damaged by screw tightening, so it is necessary to replace the bit. However, it is necessary to replace the bit with a bit that is placed on the ground one after another on a stepladder or on a scaffold. Is bothersome. Also, if a replacement bit is put in the pocket, there is a high possibility that it will be dropped and lost when a screw or the like is taken out from the pocket. For this reason, as disclosed in Japanese Patent Laid-Open No. 9-216171, there is provided an electric tool capable of storing a replacement bit in a housing. This bit storage part has ribs on all sides of the bit so that the bit does not fall on clothes on the both sides of the battery receiving part provided at the bottom of the handle, and the bit is almost completely A buried bit storage portion is formed. In addition, in this bit storage portion, there is provided a locking metal fitting that holds the bit in one place, and when the bit is taken out, it is configured to be bent and pulled out in the radial direction of the bit shaft. .

JP 2000-167785 A JP-A-6-285774 Japanese Patent Laid-Open No. 9-225861

  The hook portion shown in FIG. 17 has a problem that it is troublesome because it requires a rotating operation of the holding nut with a tool such as a spanner every time when it is rotated such as storing and pulling the hook piece and adjusting the position.

  Further, the hook portion disclosed in Japanese Patent Laid-Open No. 2000-167785 is stable and can be easily pulled out and stored, but the hook portion can be stored inside the motor upper body. Since it is necessary to embed a guide portion that can slide the hook and a support portion that supports the hook, there is a problem that the power tool becomes large.

  In addition, the hook portion disclosed in Japanese Patent Laid-Open No. 6-285774 is such that the hook rotates around the axis of the substantially cylindrical motor housing of the electric tool and always protrudes from the outer periphery of the motor housing with a certain gap. . However, since a leaf spring that elastically locks the gear provided on the hook is used, there is a problem that when the force is applied in the rotation direction, the hook easily rotates and the stability is poor. Further, when the hook is fixed with a manual lock knob, it is necessary to rotate the hook with the other hand while the lock is released with one hand, so that the operation is bad.

  In addition, the hook portion disclosed in Japanese Patent Application Laid-Open No. 9-225861 can be used to hook a small object in the gap between the hook and the motor housing, and to hook a large object in the gap between the hook and the handle. The hook mounting position is changed. However, since the rotation is held by the elastic locking between the materials, there is a problem that if the force is applied in the rotation direction, the hook easily rotates and the stability is poor. In addition, there is a holding part on the left side of the motor housing that allows you to attach and detach the hook with a single touch. To make it easier for both right-handed and left-handed workers, it is necessary to provide a holding part on the right side of the motor housing. In this case, there is a problem that the holding portion on the side where the hook is not attached interferes with the work.

  On the other hand, as disclosed in Japanese Patent Laid-Open No. 9-216171, the motor housing includes a motor housing containing a motor and a gear, a handle, a battery, a battery receiving portion, and a bit storage portion. Considering the position where the bit storage part should be provided, the motor housing does not have space to embed the bit inside, and it is inappropriate to project the motor housing because it slides into a narrow place and performs screw tightening work If it is provided on the handle, it will be difficult to grasp. If it is provided on the battery, the versatility of the battery will be low, and there will be no space to be embedded in the battery receiving part. For this reason, it is desirable that the bit storage portion protrudes from the battery receiving portion. However, when a hook as shown in FIG. 17 is provided in such an electric tool, for example, the hook drawer piece (FIG. 17) collides with the bit storage section, and the drawer piece (FIG. 17) is placed on the bit storage section side. Even when it is provided on the other side, there is a problem that the portable tool is not compact and space efficiency is poor. Further, since the use of the locking bracket disclosed in Japanese Patent Laid-Open No. 9-216171 is costly and troublesome, it is desirable that the locking portion is resin-molded integrally with the housing. When resin is used, the resin is weaker than iron, so it is necessary to increase the wall thickness so that the bit can be held, and it is also necessary to reduce the wall pressure so that the bit can be attached and detached. There was a problem. In addition, in the example of the portable tool in which a soft material is provided on the hook shown in FIG. 17, a cap-shaped soft material is put on the entire circumference of the hook piece. For example, Japanese Patent Laid-Open No. 9-216171 discloses a hook piece. When the disclosed bit storage part is provided, even if the bit is covered with a soft material and cannot be attached or detached, or even when a part of the soft material is cut out, it is removed from the place where it has been cut out due to assembly work or wear. There was a problem of cracks.

  An object of the present invention is to solve the above problems and to provide an electric tool with excellent operability that can easily change the position of a hook with respect to a tool body. That is, it is an object of the present invention to provide a power tool having a hook that can be attached to a holding portion of a hook at a plurality of positions in the circumferential direction and that is securely held in the circumferential direction.

  The present invention comprises a main body body portion, a handle portion hanging from the main body body portion, a hook portion provided on the handle portion, and a battery, and the main body body portion houses a tip tool holding portion in front. In a portable tool configured to store a motor for generating rotational power transmitted to the tip tool in the rear, and to store a battery for driving the motor in the handle on the side opposite to the main body body. The hook portion includes a holding portion that has a hole and extends from the handle portion on the side where the battery is accommodated, a hook piece, and a base end portion that is connected to one end of the hook piece, The base end portion has a cylindrical portion and a first uneven portion formed in the cylindrical portion, and the holding portion has a second uneven portion that engages with the first uneven portion in the hole portion. And having the first and second irregularities on the hook A first position in which the tip of the piece faces forward and close to the battery, and a second position in which the tip of the hooking piece is above the first position and faces near the center of gravity of the portable tool. When the hooking piece is shifted in the axial direction of the cylindrical portion, the engagement of the first and second concavo-convex portions is released, and the hooking piece rotates around the cylindrical portion. One feature is that when the hook piece is returned to the axial direction of the cylindrical portion, the first and second concavo-convex portions are engaged to prevent the hook piece from rotating.

  ADVANTAGE OF THE INVENTION According to this invention, the electric tool excellent in the operativity which can change the position of the hook with respect to a tool main body easily can be provided. In addition, by holding a tip tool such as a bit in the holding holder provided on the hook, it is possible to provide an electric tool that can improve workability and effectively utilize space. Furthermore, it is possible to provide a hook that can be securely held and can be easily detached, and a method of attaching and detaching the hook, etc., that is easily removed.

  An electric power tool such as an impact driver in this embodiment will be described with reference to FIGS. FIGS. 1 and 2 are enlarged exploded perspective views showing a main part of a hook portion of an electric power tool in this embodiment, FIG. 3 shows a movable state of the hook portion in this embodiment, (A) is a front view, (B ) Is a side view (C) is a bottom view, FIG. 4 is a cross-sectional view taken along line AA in FIG. 3 (A), and FIG. 5 shows a state in which the hook portion in this embodiment is moved in the direction in which the spring 27 is compressed. 3A is a cross-sectional view taken along line AA of FIG. 3, FIG. 6 is an external perspective view showing a state in which the hook portion in this embodiment is mounted on the opposite side, and FIG. 7 is a storage state or a protruding state of the hook portion in this embodiment. 4 is a cross-sectional view taken along line BB in FIG. 4, FIG. 8 shows a rotating portion of the hook portion in this embodiment, (a) is a cross-sectional view taken along line cc in FIG. 4, and (b) is a gear and FIG. 9 is a partially enlarged view showing the ring gear, and FIG. 9 is used to hook the electric tool onto the operator's waist belt using the hook portion in this embodiment. FIG. 10 shows a state where the electric tool is hooked on the operator's waist belt using the hook portion, and FIG. 10A shows a state where the electric tool is hooked on the operator's waist belt. (B) is an explanatory view showing a state where a bit is removed from the electric tool shown in (a) and a chuck and a woodwork cone are attached, and (c) is a lightweight battery for the electric tool shown in (a). FIG. 11 shows an electric circular saw provided with a hook portion in this embodiment, (a) is a partially cutaway side view, and (b) is an electric circular saw as a beam. FIG. 12 shows an electric drill provided with a hook portion in this embodiment, (a) is a partially longitudinal front view, (b) is a partially omitted plan view, and (c). FIG. 13B is a sectional view taken along the line dd of FIG. 13B, and FIG. 14 is an enlarged cross-sectional view of the main part, FIG. 14 is an enlarged cross-sectional view of the main part showing still another example of the hook part in this embodiment, and FIG. 15 is a view of the bit storage part provided in the hook part in this embodiment. FIG. 16 is a partial external perspective view showing a hook portion for storing a bit.

  As shown in FIG. 3, an impact driver having an outer frame such as a split housing 1 (hereinafter referred to as a housing) and a hammer case 8 has a substantially T shape, and a main body body formed by the housing 1. The unit accommodates the motor 15 as an electric or pneumatic drive source, the planetary gear unit 18 constituting the speed reduction mechanism unit, and the like, and supplies power to the motor 15 to the handle unit hanging from the body body unit. The contact switch etc. which are electrically connected with the connection terminal of the trigger switch and the storage battery are accommodated. The hammer case 8 disposed in contact with the housing 1 accommodates a striking mechanism for converting the rotational power of the motor 15 into striking force and a tip tool holding portion such as a bit or a wrench.

  In such a configuration, the rotational power of the motor 15 is transmitted from the pinion which is the output shaft of the motor 15 to the reduction mechanism unit, and the rotational force and the impact force are transmitted from the reduction mechanism unit to the tip tool 17 via the impact mechanism unit. Has been.

  The hammering mechanism portion is provided on the hammer 16, a spindle 16, a hammer 23 that can be rotated via a steel ball (steel ball) inserted into a cam groove formed in the spindle 16 and that can move in the direction of the axis of rotation. The anvil 22 has an anvil claw that is struck and rotated by a plurality of hammer claws, and a spring that constantly biases the hammer 23 toward the anvil 22 side.

  The planetary gear portion 18 serving as the speed reduction mechanism includes a fixed gear support jig, a fixed gear, a planetary gear, and a spindle 16 that are supported by a rotation stopper in the housing 1 and are supported by the spindle 16. It is comprised from the needle pin used as the rotating shaft of a planetary gear.

  In the case of a pulse impact (impact) applied to a screw or nut that is tightened by the tip tool 17, electric power is supplied to the motor 15 by operating a trigger switch, the motor 15 is driven to rotate, and the rotational power of the motor 15 is supplied to the motor 15. Steel balls disposed between the cam groove of the spindle 16 and the cam groove of the hammer 23 are transmitted to the spindle 16 via the planetary gear portion 18 (planetary planetary planetary gear, fixed gear) via a pinion connected to the tip of , The rotational force of the spindle 16 is transmitted to the hammer 23, and the hammer of the hammer 23 urged forward (to the tip tool side) by a spring disposed between the hammer 23 and the planetary gear of the spindle 16. Since the anvil 22 rotates when the nail and the anvil claw of the anvil 22 are engaged, a rotational force is applied to the tip tool 17. It is. When the tightening torque of the screw or the like by the tip tool 17 exceeds a predetermined value, the hammer claw gets over the anvil claw, so that the engagement by both claws is temporarily released, that is, when the tightening torque exceeds the predetermined value, the hammer 23 is spring-loaded. It moves (retreats) to the motor 15 side against this. Thereafter, the hammer 23 is pushed back in the direction of the anvil 22 by the compression force of the spring, and the hammer claw collides with the anvil claw to generate a striking force. In this way, continuous impact torque is applied to the tip tool 17 by repeating the rotation and axial movement of the hammer 23.

  In addition, an elastomer is applied to the surface of the housing 1 of the electric power tool having the planetary gear portion 18 by two-layer molding. The purpose of providing this elastomer is to prevent gripping of the power tool securely, or to improve gripping comfort and improve operability and workability. Furthermore, it absorbs shock when dropped on the ground. This is to prevent the electric tool from being damaged or to prevent the electric tool from slipping along the inclination when the electric tool is placed on the inclined surface. Therefore, the elastomer 15 is mainly provided around the handle grip portion and the main body body portion of the split housing 1.

  Further, the impact driver is provided with a pivotable hook portion 4 which will be described in detail below in order to hang the impact driver main body on an operator's waist belt or the like. The hook piece 2 of the hook portion 4 is provided on a cylindrical holding portion 20 that extends from a handle portion that can store the battery 18 to a position adjacent to the side surface of the battery 18, and the holding portion 20 is a base of the hook 4. It has an axial length in the left-right direction (the back side and the near side in (A)) where the end portion 28 is mounted. Further, the holding portion 20 is inserted with a post 29 of a bolt 44 from the rear end of the handle 9, and the resin-made hook piece 2 is provided with an accommodating portion for accommodating the bit 11.

  1 and 2, the hook 4 is attached to the L-shaped hook piece 2, a substantially cylindrical base end portion 28 connected to the rear end of the hook piece 2, and the base end portion 28. And a retaining portion 29. The proximal end portion 28 is provided on the pivot 30 so as to protrude from the hook piece 2 and has a gear portion 31 at the tip thereof. The proximal end portion 28 is substantially the same as the inner diameter of the gear portion 31 from the rotation barrel 32. It is formed from a horizontal cylinder 33 projecting to a diameter and a bolt receiving cylinder 34 projecting to a smaller diameter than the horizontal cylinder 33, and a locking projection (not shown) is projected inside the base end portion 28. Bolt holes 36 penetrating from the end face of the bolt receiving cylinder 34 to the nut accommodating portion 35 are embedded on the nut accommodating portion 35 and the pivot 30 of the half-hexade wall. In addition, the gear portion 31 is formed of a plurality of teeth having a surface in the direction of the pivot 30 and protruding from the base end portion 28 to the outside in the radial direction of the pivot 30. 38 is a step between the hook 2 and the rotary cylinder 32, and 39 is protruding from the rotary cylinder 32. The hook 2 is pulled to the opposite side of the handle and is rotated by releasing the engagement between the gear 31 and the ring gear 47. Rotation restraining plates for restricting the rotation range of the hooking piece 2 to be within a predetermined angle, 40 to 40 are C surfaces provided at the gear tips, and 54 and 54 are non-slip. Further, the retaining portion 29 includes a bolt 44 having a bolt head 43 in which a coin groove 42 is embedded, and a nut 45 having a locking mechanism.

  On the other hand, the holding part 20 provided in the housing 1 is symmetrical with respect to the dividing surfaces of the housings 1a and 1b. The holding part 20 has a cylindrical shape, and a rotation support hole 46 that comes into contact with the rotary cylinder 32 of the hook 4 forming a rotation support part together, a ring gear part 47 into which the gear part 31 of the hook 4 can be fitted, A spring receiver 48 that is symmetrical with the ring gear portion 47 and whose end face is in contact with the elastic spring 27, and a spring 27 that is symmetrical with the rotation support hole 46 and is adjacent to the periphery of the bolt receiving cylinder 34 of the hook 4. And a through hole 50 formed on a pivot 30 formed by a spring chamber 49 in which the bolt head 43 can be accommodated. In addition, the ring gear portion 47 has a surface in the direction of the pivot 30, and the pivot 30 extends from the through hole 50. Are formed from a plurality of teeth protruding radially inward. Further, in the rotation support hole 46, the rotation suppression plate 39 of the hook 4 abuts and a rotation suppression plate receiver 52 concentric with the rotation support hole 46 is embedded. The rotation restraint plate 39 is several times larger than the rotation restraint plate 39 and is longer than the distance from the inner surface of the bolt head 43 to the end surface of the spring receiver 48 in the direction of the pivot 30 when the rotation restraint plate receiver 52 and the rotation restraint plate 39 are assembled together. ing. In addition, a step 38 of the hook 4 is brought into contact with the end surface 53 of the holding portion 20 to form a separation preventing portion. An elastic rubber other than the spring 27 may be used for the elastic body.

  In the impact driver 21 configured as described above, when the hook 4 is assembled, the nut 45 is inserted into the nut storage portion 35 of the hook 4 and the nut 45 is locked and stored by a locking protrusion (not shown). The end portion 28 is mounted in the through hole 50 of the holding portion 20 of the housing 1a, 1b that has already been screwed so that the hook piece 2 is parallel to the bottom surface of the battery 18, and the spring 27 is further moved from the large diameter direction to the spring chamber. When the bolt 44 is inserted into the bolt hole 36 in the state of being inserted into the bolt 49, and a screwdriver or coin is fitted into the coin groove 42 and tightened until the bolt head 43 abuts the end face of the bolt receiving cylinder 34 through the nut 45, The hook 4 is assembled with the housing 1 with the spring 27 interposed. Further, since the nut 45 is a nut with a locking function, there is no risk that the screw 44 is loosened and the hook 4 is detached from the housing 1. At this time, since the holding portion 20 is symmetrical with respect to the dividing surfaces of the housings 1a and 1b, the hook 4 is mounted from the opposite direction of the holding portion 20 in accordance with the operator's dominant arm as shown in FIG. Even if the mounting direction is changed, the role of the portion in the holding portion 20 is only changed except for the ring gear portion 47. Therefore, the holding portion 20 is substantially the same even if the hook 4 is held at two positions. In other words, it is not necessary to provide two places, and the impact driver 21 becomes compact. Further, at this time, as shown in FIGS. 1 and 2, the nut 45 which is a general-purpose part is inserted into the nut housing portion 35 in the hook 4, so that insert molding in which a nut or the like is fitted into a mold and resin molding is performed, Compared to a method in which the entire end portion 28 is formed of metal and machined, the cost is low, and since it is fastened and fixed by a bolt 44 and a nut 45, it is more durable than a method in which the resin-molded housing 1 is screwed. High nature.

  FIG. 4 shows a storage state in which the hook piece 2 of the hook 4 is stored at a position substantially adjacent to the side surface of the battery 18. The hook 4 is supported so that the pressure of the spring 27 is applied in the direction of pushing out the bolt head 43 with the end surface of the spring receiver 48 in the holding portion 20 as a fulcrum, and the step 38 of the hook 4 abuts on the end surface 53 of the holding portion 20. Therefore, the hook 4 is prevented from being detached, and the gear portion 31 is held in the fitted state with the ring gear portion 47, so that the rotation of the pivot 30 of the base end portion 28 in the circumferential direction is prevented, and at the time of storage. Stability is achieved.

  When the hook 4 is used from here, the hooks 4 are held as shown in FIG. 5 by holding the anti-slip portions 54, 54 on the pivot 30 with fingers and pulling them out to the side of the pivot 30 (upward in the figure). The hook 4 can be rotated because the gear portion 31 and the ring gear portion 47 are disengaged while being able to move sideways from the portion 20. However, in this state, the bolt head 43 is locked to the end face of the spring receiver 48 via the compressed spring 27, so that the hook 4 is prevented from being released to the side. Further, when the hook 4 is pulled out, the spring 27 can be compressed to the thickness of the wire diameter because of the mortar shape, so that a large pulling amount of the hook 4 can be obtained. In other words, the holding portion 20 can be made compact in the width in the axis 30 direction. it can. Then, as shown in FIG. 3 (A), the hook 4 is rotated so that the tip of the hook piece 2 faces upward as shown in FIG. When the finger is released at the position 2e pointing near 55, the pressure of the spring 27 is applied in the direction of pushing out the bolt head 43 with the end face of the spring receiver 48 in the holding portion 20 as a fulcrum as shown in FIG. And the ring gear portion 47 are fitted, the step 38 is in contact with and supported by the end surface 53, and the hook piece 2 is stably fixed at the position 2e in FIG. When the hook 4 is rotated, as shown in FIG. 5, the rotary cylinder 32 is in contact with the rotation support hole 46 and slides, so that the hook 4 can always rotate on the pivot 30 and a plurality of teeth are geared. Since the C surface 40-40 of the gear part 31 plays a role of peeping in addition to the part 31 and the ring gear part 47, the gear part 31 and the ring gear part 47 can be fitted just by removing the finger from the pulled out state. It is easy to do. Moreover, the C surfaces 40 to 40 also have an effect of preventing the tip of the gear portion 31 from being lost. Although the impact driver 21 is not provided on the mold division structure, a C surface may be provided at the tip of the ring gear portion 47. Even if the gear part 31 and the ring gear part 47 are not fitted just by removing the finger, the hook 4 can be fitted with a light tap.

  Next, when the hook 4 is not used, the hook 4 is moved from the holding portion 20 to the side by holding the anti-slip 54, 54 on the pivot 30 with a finger and pulling it out in the direction opposite to the pivot 30. In addition, since the fitting of the gear portion 31 and the ring gear portion 47 is released, the hook 4 can be rotated. Then, the hook 4 is rotated so that the tip of the hook 2 is directed forward from the state in which the pulled-out state is held by the finger, and the end surface of the rotation restraining plate 39 is placed on the rotation restraining plate receiver 52 as shown in FIG. If the finger is released at a position where it abuts on the end face, the hook 2 of the hook 4 is stored at a position substantially adjacent to the side face of the battery 18.

  Here, the shapes of the gear part 31 and the ring gear part 47 will be described in detail. As shown in FIG. 8A, when an operator's force P1 is applied to the tip of the hook 4 in the circumferential direction of the pivot 30, a moment M1 is applied to one point of the fitting portion, but the teeth of the gear portion 31 and the ring gear portion 47 Is formed on the surface of the pivot 30 in the substantially radial direction, the moment M1 acting on the teeth of the gear portion 31 can be received substantially vertically by the teeth of the ring gear portion 47, and there is no waste in suppressing the rotation of the hook 4. In addition, as shown in FIG. 8 (B), since the gear portion 31 and the ring gear portion 47 are provided with a plurality of teeth, the moment M1 can be dispersed into the moment M2, so the holding portion 20 and the base end portion 28 can be made compact. And can be firmly fitted. Further, as shown in FIG. 1, since the teeth of the gear portion 31 and the ring gear portion 47 are formed on the surface in the direction of the pivot 30, the hook 4 is lateral to the direction of the pivot 30 even if a force is applied in the turning direction (in the drawing). It will not slide to the front). In addition, since the teeth of the gear portion 31 and the ring gear portion 47 protrude in the radial direction of the pivot 30 from the base end portion 28 and the through hole 50, the teeth are the shaft of the pivot 30 from the end surfaces of the base end portion 28 and the through hole 50. Compared with the configuration projecting in the direction, the joint area between the tooth and the base end portion 28 and the through hole 50 can be widened, the joint strength is strong, and the configuration in which the tooth projects in the direction of the pivot 30 is the radial direction of the pivot 30 If it is attempted to obtain a strength equivalent to the joint strength of the protruding teeth, the gear portion 31 and the ring gear portion 47 are enlarged in the radial direction of the pivot 30, resulting in an inappropriate configuration.

  Next, FIG. 9 shows a state in which the impact driver 21 is hooked on the waist belt 76. FIG. 9 shows a drawing when a force P2 in the pulling direction is applied to the hook 4 in accordance with the movement of the operator. However, since the base end portion 28 and the through hole 50 are fitted, the waist belt 76 is attached. When force P2 is applied to the hooked support point 26, the base end portion 28 rotates, and moments M3 and M3 act on the end points 56 and 56 of the base end portion 28 in the circumferential direction of the center 57 thereof. The moments M3 and M3 can be decomposed into forces F1 and F1 acting perpendicularly to the inner wall of the through hole 50 and forces F2 and F3 acting parallel to the pivot 30 and respectively in opposite directions, but the forces F2 and F3 cancel each other. The base end portion 28 is pressure-bonded to the through hole 50 by the forces F1 and F1 acting perpendicularly to the inner wall of the through hole 50. In other words, since the base end portion 28 is twisted in the through hole 50 and cannot be pulled out, the hook 4 cannot be pulled out except by pulling straight on the pivot 30 with a finger, and the stability at the time of hooking is good. In addition, since the impact driver 21 is always subjected to gravity while being hooked on the belt 76, the force P3 is applied to the hook piece and the base end portion 28 is kept twisted in the through hole 50.

  Further, when the impact driver 21 is hooked on the waist belt 76, the center of gravity 55 of the impact driver 21 is located below the support point 26 of the hook 4 as shown in FIG. It is in a vertical relationship with 76 and is stable. Moreover, when the woodworking cone 58 and the drill chuck 59 are attached as shown in FIG. 11B, or the lightweight battery 60 with a low voltage is attached as shown in FIG. 10C, the center of gravity 55 of the impact driver 21 is set respectively. Although the center of gravity 61 and 62 change, the hook piece 2 is held at a plurality of positions in the circumferential direction. Therefore, if the position 2e of the hook piece 2 is simply rotated to the positions 2d and 2f, respectively, Since the relationship of the belt 76 is always vertical and deeply hooked, the stability at the time of hooking may be obtained by additionally changing parts. In addition, as described above, the hook 4 cannot be firmly rotated even if a force is applied in the rotation direction, and the hook 4 is not pulled out with the movement of the operator. Kept.

  Next, the strength of the hook 4 when the impact driver 21 is dropped will be described. If the hook piece 2 is in the position 2a shown in FIG. 3, the battery 18 absorbs the impact, and if it is in the positions 2c, 2d, 2e, and 2f, the hook piece 2 comes into curved contact with the handle 9 and the handle 9 absorbs the shock. . However, when the hook piece 2 is located at a position other than the positions 2a, 2c, 2d, 2e, and 2f, for example, when a drop impact is received at the position 2g, the hook piece 2 itself must absorb the impact, There was a problem that 2 would become large. Therefore, as shown in FIG. 7, a rotation restraining plate 39 is provided at the base end portion 28, and a rotation restraining plate support 52 is provided at the holding portion 20, and the rotational movement range of the hooking piece 2 is set at the positions 2a, 2c, 2d, 2e. The hook 4 can be made compact by controlling in the range of 2f.

  The hook configuration described above is a simple method in which a plurality of position selections are simply slid and turned, and has good stability when hooked on a belt or the like, and a method of adjoining a portable tool with a compact structure. Because it can be stored in, it is not limited to the exemplified impact driver, there are many cases where there is no empty space in the housing or where the hook mounting location is limited, circular saw, drill, disc grinder, screwdriver, hammer, It can be widely applied to most portable tools such as jigsaws, cutters, saversaws, air tools, nailing machines, etc., and is highly versatile. For example, as shown in FIG. 11, even when a hook for hooking on a roof beam 63 is attached to the circular saw 64, the holding portion 20 is projected from the side of the motor housing 19 and the hook piece 2 is If it is formed in a letter shape and adjacent to the end face of the motor housing 19 with a gap corresponding to the sliding amount of the hook 4, it can be mounted on an electric circular saw, and there is an empty space above the motor, as shown in FIG. In the case of mounting on a drill 65 or a screw driver, the hook piece 2 can be formed in an L shape projecting parallel to the pivot, and the hook 4 and the entire holding portion 20 can be accommodated and mounted. Although FIG. 12C is a DD cross section of FIG. 12B, a part of the ring gear portion 47 may be omitted in this way in the mold structure. In addition, as described above, in both the round and the drill, gravity P4 acts on the hook piece 2 when hooked on a beam, a belt, or the like, but the hook 4 is prevented from being detached from the end surface 53 of the holding portion 20 and is stable. Further, when pulling the hook piece 2 from a beam or a belt, a force P5 is applied to the hook piece 2 due to friction. However, since the base end portion 28 of the hook 4 is twisted in the holding portion 20, the hook 4 slides and becomes difficult to pull out. There is no operability.

  4, the hook 4 is provided with the base end portion 28 and the housing 1 is provided with the holding portion 20, but the hook 4 is provided with the holding portion 20 as shown in FIG. Even in the configuration in which the portion 28 is provided, the same effect can be obtained. Further, as shown in FIG. 14, the housing 1 including the base end portion 28 of FIG. 13 may be replaced with the retaining portion 29, and the rotation that supports the rotation of the rotating cylinder 32 when the hook 4 of FIG. The rotating cylinder 32 may be supported by the ring gear 47 as shown in FIG. In this way, the configuration may be such that the portions are replaced, the portions are subdivided to increase the operation accuracy, or the two effects are shared by one portion.

  Next, the bit storage configuration and method will be described. FIG. 1 is a partial explanatory view of an impact driver provided with a hook, and a hook accommodating piece 2 of a hook 4 is recessed with a bit accommodating portion 66 which is a groove-shaped accommodating holding portion, and the bit accommodating portion 66 is a hexahedron. Bit 11 is stored almost completely. 67 is a fitting portion into which the bit 11 can be fitted, 68 is a neck portion embedded in the front and rear of the bit 11, 69 is a stopper projecting from the elastic flat plate 70 and elastically locking the neck portion, 71 is the bit storage portion 1 , 72 and 73 are heads of the bit 11, and 74 is a recess on the back surface of the flat plate 70.

  On the other hand, when the bit 11 is mounted, as shown in FIG. 15, if the bit 11 is slid by pushing the head 73 with the finger in the direction of the bit shaft 75 from the rear of the bit storage portion 66 (right side in the drawing), The stopper 69 is elastically locked to the neck portion 68 of the bit 11, and the bit 11 is assembled to the hook 4. 4 is a view showing a state in which the bit 11 is housed in the hook 4. FIG. 4 (B) is a cross-sectional view taken along the line E-E of FIG. 4 (A). The bit portion 11 is held in a fitted state by the fitting portion 67, and the bit shaft 75 is prevented from swinging in the circumferential direction and the radial direction. In addition, since the stopper 69 is elastically locked to the neck portion 68 to prevent the bit shaft 75 from swinging in the axial direction, the stability is also improved. In addition, since the bit 11 is stored at the edge and the surface position of the hooking piece 2, that is, completely embedded so that the outer periphery of the bit 11 does not protrude from the bit storage portion 66, the bit 11 is hooked on clothes or the like. There is no danger of detachment and it is excellent in safety. Next, when pulling out the bit 11 as shown in FIG. 15, if a finger is inserted from the notch 71 of the bit storage portion 66 and the head 72 is slid rearward (right side in the figure), the stopper 69 or the flat plate 70 is moved. When pressed by the head 72, the flat plate 70 is bent and unlocked by the stopper 69, and the head 73 can be protruded rearward from the bit storage portion 66. If the head 73 is pulled out with fingers, Bit 11 is pulled from hook 4. At this time, even if the elastic pressure of the flat plate 70 is lowered by the concave portion 74 and the hooking piece 2 is in contact with the side surface of the battery 18, the curved flat plate 70 and the side surface of the battery 18 do not collide.

  Therefore, as described above, in a portable tool including a hook and a bit storage part, space efficiency is good if the hook hook piece is replaced with a bit storage part. Further, the bit is slid in and removed from the bit axis direction, and is divided into locking means for preventing bit axis circumferential and radial swings and elastic locking means for preventing bit axis swings. As a result, the hook can be integrally molded with resin, and the cost and assembly work are not required.

  Further, as shown in FIG. 16, if a soft body 3 to 3 such as an anti-slip or member protecting rubber is press-fitted or bonded to one part of the edge of the hooking piece 4 or bonded or formed into two layers, the bit can be stored. It becomes possible to provide a soft material on the hook provided with the portion. A method of applying a soft paint may also be used.

  From the above, the bit storage configuration is space efficient and uses a resin-integrated locking means that does not require cost and assembly work. It can be widely applied to portable tools such as screwdrivers, screwdriver drills, and pneumatic tool drivers.

It is a principal part expansion disassembled perspective view which shows the hook part of the electric tool which becomes this invention. It is a principal part expansion disassembled perspective view which shows the hook part of the electric tool which becomes this invention. The movable state of the hook part which becomes this invention is shown, (A) is a front view, (B) is a side view (C) is a bottom view. It is the sectional view on the AA line of FIG. 3 (A) which becomes this invention. It is the sectional view on the AA line of FIG. 3 (A) which shows the state which moved the hook part which becomes this invention to the direction which compresses the spring 27. FIG. It is an external appearance perspective view which shows the state which mounted | wore the other side with the hook part which becomes this invention. It is the BB sectional drawing of FIG. 4 which shows the accommodation state or protrusion state of the hook part which becomes this invention. The rotation part of the hook part which becomes this invention is shown, (a) is the cc sectional view taken on the line of FIG. 4, (b) is the elements on larger scale which show a gear and a ring gear. It is a principal part enlarged view which shows the state which hooked the electric tool on the operator's waist belt using the hook part which becomes this invention. The state which hung the electric tool on the operator's waist belt using the hook part which becomes this invention is shown, (a) is explanatory drawing which shows the state which hooked the electric tool on the operator's waist belt, (b) (A) is an explanatory view showing a state where a bit is removed from the electric tool shown in (a) and a chuck and a woodwork cone are attached, and (c) is an explanatory view showing a state where a lightweight battery is attached to the electric tool shown in (a). is there. The electric circular saw which provided the hook part which becomes this invention is shown, (a) is a partially vertical side view, (b) is a state figure which shows the state which hooked the electric circular saw on the beam. The electric drill provided with the hook part which becomes this invention is shown, (a) is a partially longitudinal front view, (b) is a partially omitted plan view, (c) is a sectional view taken along the line dd of (b). FIG. 13 is an enlarged cross-sectional view showing a main part of another example of the hook portion in the present embodiment. It is a principal part expanded sectional view which shows the other example of the hook part which becomes this invention. It is a principal part expanded sectional view which shows the further another example of the hook part which becomes this invention. It is the sectional view on the AA line of Fig.3 (a) which shows the bit accommodating part provided in the hook part which becomes this invention. It is a partial external appearance perspective view which shows the hook part which accommodates the bit which becomes this invention. It is an external appearance perspective view which shows the electric tool which has the conventional hook.

Explanation of symbols

1a is housing, 1b is housing, 2 is hook piece, 4 is hook, 11 is bit, 18 is battery, 20 is holding part, 21 is cordless impact driver, 27 is spring, 29 is retaining part, 30 is pivot, 31 is a gear part, 32 is a rotating cylinder, 35 is a nut storage part, 36 is a bolt hole, 38 is a step, 39 is a rotation restraining piece, 44 is a bolt, 45 is a nut, 46 is a rotation support hole, 47 is a ring gear part, 48 is a spring receiver, 49 is a spring chamber, 50 is a through hole, 52 is a rotation restraint piece receiver, 53 is an end face, 54 is a slip stopper, 66 is a bit storage part, 67 is a clamping part, 68 is a neck part, and 69 is a stopper. , 70 is a flat plate, 71 is a notch, 72 and 73 are heads, and 75 is a bit shaft.

Claims (2)

  The body torso,
  A handle portion depending from the body body portion;
  A hook portion provided on the handle portion;
  Battery and more
  In the main body body portion, a tip tool holding portion is housed in the front,
  A motor that generates rotational power to be transmitted to the tip tool is stored in the rear,
  In the portable tool configured to be able to store a battery for driving the motor in the handle portion on the side opposite to the main body body portion,
  The hook part includes a holding part that has a hole and extends from the handle part on the side where the battery is accommodated, a hook piece, and a base end part that is connected to one end of the hook piece,
  The base end portion has a cylindrical portion and a first uneven portion formed in the cylindrical portion,
  The holding portion has a second uneven portion that engages with the first uneven portion in the hole portion,
  The first and second concavo-convex portions, a first position where the tip of the hook piece is directed forward and close to the battery;
  The front end of the hook piece is above the first position and is configured to be engageable with the second position facing the vicinity of the center of gravity of the portable tool.
  When the hook piece is shifted in the axial direction of the cylindrical portion, the engagement of the first and second concavo-convex portions is released, and the hook piece is rotatable about the cylindrical portion,
  When the hooking piece is returned in the axial direction of the cylindrical portion, the first and second concavo-convex parts are engaged to prevent the hooking piece from rotating.   The body torso,
  A handle portion depending from the body body portion;
  A hook portion provided on the handle portion;
  Battery and more
  In the main body body portion, a tip tool holding portion is housed in the front,
  A motor that generates rotational power to be transmitted to the tip tool is stored in the rear,
  In the portable tool configured to be able to store a battery for driving the motor in the handle portion on the side opposite to the main body body portion,
  The hook part includes a holding part that has a hole and extends from the handle part on the side where the battery is accommodated, a hook piece, and a base end part that is connected to one end of the hook piece,
  The base end portion has a cylindrical portion and a first uneven portion formed in the cylindrical portion,
  The holding portion has a second uneven portion that engages with the first uneven portion in the hole portion,
  A first position where the first and second concavo-convex portions are housed by the hook piece being adjacent to the portable tool;
  The hook piece is directed upward from the first position and is configured to be engageable with the second position where the hook piece can be hooked on the operator's belt,
  A step is provided at one end of the base end, a retaining member is attached to the other end, the first and second uneven portions are positioned between the step and the retaining member, and the hook piece is When the base end portion is shifted in the axial direction, the engagement of the first and second concavo-convex portions is released, the hook piece can be rotated about the cylindrical portion, and the hook piece is moved to the base end. The portable tool is characterized in that the first and second concavo-convex parts engage with each other when the part moves back in the axial direction, and the hooking piece is prevented from rotating.

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