JP4244795B2 - Portable tool with hook - Google Patents

Description

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

  Conventionally, for portable tools such as electric tools such as cutters, drills and hammers, and pneumatic tools, a hook handle is projected from the housing of the portable tool, and the hook handle is attached to the operator when the portable tool is not used. A portable tool with a hook has been known in which a portable tool is hooked on an operator by locking it to a waist belt, etc., so that both hands of the operator can be used and construction workability is improved. (For example, refer to Patent Document 1).

  Specifically, as shown in FIG. 7, the portable tool with a hook of Patent Document 1 has a through hole 4 formed in the housing 1 of the portable tool, and the base end of the hook handle 5 to be hooked on an operator is formed in the through hole 4. Inserted into one of the openings into the through hole 4, the engaging protrusion 8 projecting from the base end of the hook handle 5 is engaged with the engaging teeth 9 carved on the inner surface of the through hole 4. The screw tool 30 is inserted into the through-hole 4 from the other opening, and an elastic spring 27 is interposed between the end face of the other side of the through-hole 4 of the engagement tooth 9 and the head 30 a of the screw tool 30. The hook handle 5 is rotatably attached to the through hole 4 by screwing the tip end of the shaft portion 30b of the screw tool 30 to the base end of the hook handle 5. As described above, the hook handle 5 is detachably attached to the housing 1 by fastening the screw tool 30, and the hook handle 5 is provided on the housing 1 so as to be easy to use for both right-handed workers and left-handed workers. It can be placed on either the left or right side.

However, when the operator performs the replacement work of the hook handle 5, the screw 30 is not sufficiently tightened to the hook handle 5, and when the construction work is continued without noticing this, The tightening of the screw tool 30 to the hook handle 5 is loosened due to vibration or the like, the screw tool 30 is detached from the hook handle 5 and the hook handle 5 is dropped from the housing 1, and the portable tool hooked on the worker is removed from the worker. It would fall, and the safety of construction work could not be ensured.
JP 2002-254358 A

  The present invention was invented in view of the above-described conventional problems, and even if a member for attaching the hook handle to the housing is removed, the hook handle is prevented from immediately falling off the housing, It is an object of the present invention to provide a portable tool with a hook that can increase the safety of construction work.

In order to solve the above-mentioned problems, a portable tool with a hook according to claim 1 of the present invention has a through hole 4 formed in a housing 1 of a portable tool in which a main body body 2 and a grip 3 are integrally formed. The rotating shaft 6 is integrally protruded laterally from the hook handle 5 hooked on the operator, the rotating shaft 6 is inserted into the through hole 4, and the cap material 7 is screwed to the tip of the rotating shaft 6. As a result, the hook handle 5 is pivotably attached to the housing 1, and the engaging projection 8 protrudes radially outward from the peripheral surface of the rotating shaft 6, and the engaging projection 8 is disposed in the through hole 4. In a portable tool with a hook that allows the hook handle 5 to be held or released with respect to the housing 1 at a predetermined rotational position by being engaged with and disengaged from the tooth 9, the hook handle is within the rotational range of the hook handle 5. 5 is set in a storage state along the housing 1 , Projecting from the peripheral surface of the retaining projection 10 in the radially outward direction of the rotary shaft 6, the retaining projection 11 as Liaoning the peripheral wall of the through-hole 4 projecting from the radially inward direction, the pivot shaft 6 With the insertion through the through hole 4, the retaining projection 10 is positioned deeper in the through hole 4 than the retaining projection 11, and the retaining projection 10 and the retaining projection 11 can be contacted in the axial direction. A notch 12 is formed through the retaining protrusion 11 in the axial direction so that the retaining protrusion 10 can be inserted, and the retaining protrusion 10 is inserted into the notch 12 only when the hook handle 5 is in the stored state. It is characterized by being made possible.

  According to this, even if the cap material 7 for attaching the hook handle 5 to the housing 1 is detached from the tip of the rotating shaft 6, the retaining protrusion 10 and the notch portion 12 are in the axial direction of the rotating shaft 6. As long as there is no overlapping positional relationship, the retaining protrusion 10 is hooked on the retaining protrusion 11 to prevent the rotating shaft 6 from coming off from the through hole 4, and thus is formed integrally with the rotating shaft 6. The possibility that the hook handle 5 is immediately detached from the housing 1 can be reduced.

In addition , the hook handle 5 in the stored state positioned along the housing 1 is not caught by the operator, and the retaining protrusion 10 can be inserted into the notch 12 only when the hook handle 5 is stored. Since the hook handle 5 can be detached from the housing 1, that is, when the hook handle 5 that can be hooked on an operator is in use, the hook handle 5 can be reliably prevented from coming off from the housing 1. .

  According to the present invention, a retaining protrusion protrudes radially outward from the peripheral surface of the rotating shaft, a retaining protrusion protrudes radially inward so as to turn around the peripheral wall of the through hole, and the rotating shaft extends through the through hole. In this state, the retaining protrusion is positioned deeper in the through hole than the retaining protrusion, and the retaining protrusion and the retaining protrusion can be contacted in the axial direction. Since the notch that allows the retaining protrusion to be inserted through is formed, even if the cap material for mounting the hook handle to the housing is detached from the tip of the rotating shaft, the notch and the retaining protrusion Is not in a position that overlaps in the axial direction of the rotating shaft, the retaining protrusion is caught by the retaining protrusion and prevents the rotating shaft from falling out of the through hole, that is, the hook handle integrated with the rotating shaft from falling out of the housing. And can be carried around by workers Can reduce the risk of falling from the operator of the tool, it is possible to enhance the safety of construction work. In addition to this, a storage state is provided such that the hook handle follows the housing within the rotation range of the hook handle so that the retaining protrusion can be inserted into the notch only when the hook handle is in the stored state. Then, it is possible to reliably prevent the hook handle from falling off from the housing when the hook handle is in use, that is, it is possible to reliably eliminate the fall of the portable tool hooked on the operator from the operator. It is possible to ensure safety.

  1 to 6 show examples of embodiments of the present invention. The portable tool with a hook of this example has a feature in the structure of mounting the hook handle 5 to be hooked on an operator to the housing 1, and more specifically, a member (cap) for mounting the hook handle 5 to the housing 1 Even if the material 7) is removed, the portable tool hooked on the worker through the hook handle 5 is prevented from dropping from the worker, and the safety of construction work can be secured. is doing. Details will be described below.

  The portable tool with a hook of this example is a tool having portable performance such as an electric drill, for example. The main body is composed of a grip portion 3 held by an operator and a pedestal portion 13 provided at the tip of the grip portion 3. Specifically, the front end of the working tool is positioned on the front end side of the main body body portion 2, and the grip portion 3 is projected from the rear end side of the main body body portion 2. The pedestal portion 13 is a flat rectangular block-shaped portion. When the tip of the grip portion 3 is directed downward, the tip of the grip portion 3 is connected to the center of the upper surface of the pedestal portion 13, and the pedestal portion 13 A battery 14 for supplying power to the drive unit can be attached to the lower surface of the battery. The housing 1 constituting the outer shell of the portable tool is a resin molded product in which the outer shells of the main body body portion 2, the grip portion 3, and the pedestal portion 13 are integrated. A pair of left and right symmetrical housing halves 1a and 1b respectively constituting the outer shells of the half part and the right half part are abutted and integrated at the center in the left and right direction.

  A through hole 4 penetrating in the left-right direction is drilled in the rear end portion of the pedestal 13 in the housing 1 of the portable tool. The through hole 4 is a part where the hook handle 5 is attached to the housing 1. Here, the hook handle 5 which is a member hooked on the belt or the like of the operator is formed in a rod shape whose thickness and width become smaller toward the tip in this example, and from the base end portion of the hook handle 5 to the side. In addition, a cylindrical rotation shaft 6 is integrally projected at a right angle. The rotating shaft 6 is inserted through the through hole 4. That is, the hook handle 5 is rotatably attached to the housing 1 by the pivotal support of the rotation shaft 6 to the through hole 4.

  Specifically, the rotating shaft 6 includes a root portion 15, an intermediate portion 16, and a tip portion 17 having different diameters. The intermediate portion 16 is formed with a smaller diameter than the root portion 15 with the step portion 18 as a boundary, and the tip portion 17 is formed with a smaller diameter than the intermediate portion 16 with the step portion 19 as a boundary. In this example, the hook handle 5, the root portion 15 and the intermediate portion 16 of the rotating shaft 6 are integrally formed of resin, and the tip portion 17 of the rotating shaft 6 is a metal screw when the intermediate portion 16 is formed. It is formed by insert molding 17a and projecting a metal screw 17a from the tip of the intermediate portion 16. Further, on the peripheral surface of the root portion 15 of the rotation shaft 6, the rotation restricting projection 20 extends in the axial direction from the side end surface of the proximal end portion of the hook handle 5 and protrudes radially outward at a portion on the root side. In addition, a retaining projection 10 is projected in a radially outward direction at a portion on the tip side. A pair of the rotation restricting protrusions 20 and the retaining protrusions 10 are provided at a phase of 180 ° which is the same as the protruding direction of the hook handle 5 with respect to the rotating shaft 6. The protrusion height of the rotation restricting protrusion 20 from the peripheral surface of the rotation shaft 6 is formed higher than that of the retaining protrusion 10. Further, a plurality of engaging projections 8 project in a radially outward direction in a gear shape on the circumferential surface of the intermediate portion 16 of the rotating shaft 6. In other words, a large number of engaging projections 8 are projected at a constant pitch over the peripheral surface of the intermediate portion 16 of the rotating shaft 6. The outer diameter of the engaging protrusion 8 is formed smaller than the inner diameter of the retaining protrusion 11 of the through hole 4 described later.

  Further, in the vicinity of the left and right openings 4a and 4b of the through hole 4 penetrating the rear end portion of the pedestal portion 13 in the left-right direction, a rotation restricting portion 4d for restricting the rotation of the hook handle 5 is provided. The diameter of the through-hole 4 in the rotation restricting portion 4d is formed to be substantially the same as the diameter of the root portion 15 of the rotation shaft 6, and when the rotation shaft 6 is inserted into the through-hole 4, it rotates without play. The moving shaft 6 can be rotated. Further, a rotation restricting recess 21 is recessed in the radially outward direction on the peripheral wall of the through hole 4 in the rotation restricting portion 4d. When the rotation shaft 6 is inserted into the through hole 4, the base side portion of the root portion 15 of the rotation shaft 6 is positioned in the rotation restriction portion 4 d of the through hole 4. The protrusion 20 is inserted into the rotation restriction recess 21, and the rotation shaft 6 is rotatable within a range in which the rotation restriction protrusion 20 moves within the rotation restriction recess 21. That is, the rotation range of the rotation shaft 6 is determined by inserting the rotation restriction protrusion 20 into the rotation restriction recess 21. Further, a protrusion protrusion 11 is provided in a radially inward direction so as to turn around the peripheral wall of the through hole 4 at a position in the back of the through hole 4 adjacent to the rotation restricting portion 4d. The inner diameter of the retaining protrusion 11 is formed to be substantially the same as the shaft diameter of the root portion 15 of the rotating shaft 6. The retaining protrusion 11 is formed with a notch 12 that penetrates in the axial direction of the rotating shaft 6 inserted into the through hole 4. The notch 12 is a part through which the retaining protrusion 10 can be inserted when the rotating shaft 6 is inserted into the through hole 4. Specifically, the notch 12 is provided at a position overlapping the rotation restricting recess 21 in the axial direction, and the depth of cut from the inner surface of the retaining protrusion 11 in the notch 12 to the radial direction is the rotation restricting recess. 21 is formed shallower than the depth of the recess in the radially outward direction from the peripheral wall of the through hole 4. Thus, when the rotation shaft 6 is inserted into the through hole 4, the retaining protrusion 10 is inserted through the rotation restricting recess 21 and the notch 12 in this order, but the rotation restricting protrusion cannot pass through the notch 12. Therefore, the positioning in the axial direction of the inserted state of the rotating shaft 6 into the through hole 4 is performed.

  When the rotation shaft 6 is inserted into the through hole 4 in such a way that the axial positioning is performed in this way, the retaining protrusion 10 of the rotating shaft 6 is located in the through hole 4 more than the retaining protrusion 11 of the through hole 4. The engaging protrusion 8 of the rotating shaft 6 is positioned at the back, and the distal end portion 17 of the rotating shaft 6 is positioned at a position passing through the through hole 4. It becomes like this. The tip portion 17 of the rotating shaft 6 that has passed through the through hole 4 is constituted by the metal screw 17a as described above, and the cap material 7 having the female screw hole 7a is screwed to the tip portion 17. Thus, the rotation shaft 6 is attached to the through hole 4. The cap material 7 has a larger diameter than the left and right openings 4a and 4b of the through hole 4. When the tip 17 of the rotating shaft 6 is screwed into the female screw hole 7a of the cap material 7, One end surface of the cap material 7 opened by the screw hole 7 a is brought into contact with the hole edge of the through hole 4.

  The through hole 4 has a rectangular shape in which an operation block 22 is inserted and disposed in the through hole 4 at the center in the left and right direction as well as the left and right openings 4a and 4b through which the rotation shaft 6 is inserted. The upper opening 4c is formed. The central portion in the left-right direction of the through-hole 4 having the upper opening 4c is a large-diameter portion 4e having a larger diameter than the other portions of the through-hole 4, and the large-diameter portion of the through-hole 4 A long sliding groove 23 is provided in the axial direction on the peripheral wall 4e. The operation block 22 is disposed in the through hole 4 and is formed by integrating a ring portion 24 through which the rotating shaft 6 is inserted and an operation portion 25 positioned outside the through hole 4. The ring portion 24 is formed with an internal gear-like engagement tooth 9 that is engaged with the gear-like engagement protrusion 8 of the rotating shaft 6 over the inner peripheral surface thereof. A sliding projection 26 to be inserted into the sliding groove 23 is formed on the outer peripheral surface of the ring portion 24. That is, the operation block 22 disposed in the through hole 4 through the upper opening 4c is slidable in the axial direction by insertion of the sliding projection 26 into the sliding groove 23, but is in the direction around the axis. Is in a state in which the position is restricted in a non-rotating state.

  In addition, an elastic spring 27 that biases the operation block 22 in one of the sliding directions is interposed between the operation block 22 and the through hole 4. More specifically, the elastic spring 27 is constituted by a coil spring having a diameter that extends along the peripheral wall of the large-diameter portion 4e of the through hole 4, and the vertical end surface of the retaining protrusion 11 of the opposing through hole 4 and the operation block. 22 is interposed between the vertical end surfaces of the ring portion 24. The operation block 22 urged by the elastic spring 27 is arranged such that the ring portion 24 is disposed at the center position in the left-right direction of the through hole 4, and the engagement teeth 9 of the ring portion 24 and the engagement protrusions 8 of the rotating shaft 6. Are engaged and can be engaged. The engagement between the engagement tooth 9 and the engagement protrusion 8 is enabled when the rotation shaft 6 is positioned at a predetermined rotation position. In the engaged state, the rotating shaft 6 is held in a non-rotating state. Further, by pressing the operating portion 25 in a direction against the bias of the elastic spring 27, the sliding projection 26 receives the guide of the sliding groove 23 so that the operating block 22 shifts the position in the through hole 4. By sliding in the axial direction, the engagement between the engagement teeth 9 of the ring portion 24 and the engagement protrusions 8 of the rotating shaft 6 can be released. In the state where the engagement between the engagement teeth 9 and the engagement protrusions 8 is released, the rotation shaft 6 is freely rotatable. Therefore, the hook handle 5 attached to the housing 1 rotates the operation block 22 to a predetermined rotation position while pressing the operation block 22 against the elastic spring 27, and stops pressing on the operation block 22 to stop the elastic spring. By holding the rotation shaft 6 by the operation block 22 to which the urging force 27 is applied, it can be fixedly arranged at a desired rotation position.

  Here, the hook handle 5 of this example has a rotation range from a position along the base portion 13 of the housing 1 to a position protruding obliquely upward from the base portion 13 of the housing 1 as shown in FIG. The state in which the hook handle 5 is in the position along the pedestal portion 13 is the stowed state (the position of the hook handle 5 shown by the solid line in FIG. 2), and the hook handle 5 is in a position protruding obliquely upward from the pedestal portion 13. Is in use (the position of the hook handle 5 indicated by the dotted line in FIG. 2). Since the hook handle 5 in use is projected from the housing 1, it can be hooked on the operator's belt or the like, and the operator can use both hands of the operator by hooking the portable tool to the operator. This ensures good workability in construction. On the other hand, since the hook handle 5 in the storage state is arranged along the housing 1, it is possible to prevent the hook handle 5 from interfering with the construction work and surrounding members from being caught by the hook handle 5. In addition, good storage properties are secured.

  And in the portable tool with a hook of this example, in the accommodation state of this hook handle 5, the insertion / extraction of the rotating shaft 6 with respect to the through-hole 4 is attained, and the attachment / detachment of the hook handle 5 to the housing 1 is possible. Is possible. That is, as shown in FIG. 4, the notch 12 of the retaining protrusion 11 is positioned so as to overlap the retaining protrusion 10 of the hook handle 5 in the stored state in the axial direction. Is in a state in which it can be inserted into the notch 12. If the hook handle 5 is not in the retracted state, the notch portion 12 of the retaining protrusion 11 is secured to the retaining protrusion of the hook handle 5 as shown in FIG. The retaining protrusion 10 is not inserted into the notch 12 and does not overlap with the hook handle 5, and even if an attempt is made to pull out the rotating shaft 6 from the through hole 4 together with the hook handle 5, the retaining protrusion 10 is not removed. The hook protrusion 5 cannot be removed from the housing 1 because the stopper protrusion 10 is brought into contact with the vertical end surface of the through-hole 4 of the retaining protrusion 11.

  By the way, also in the portable tool with a hook of this example, the hook handle 5 can be changed according to the left-handed or right-handedness of the operator as in the past. That is, the integral body of the rotating shaft 6 and the hook handle 5 is formed symmetrically including the protrusions 8, 10, and 20 provided on the rotating shaft 6, and the through-hole 4 also has left and right openings 4a and 4b. The rotation restricting portion 4d and the retaining protrusion 11 are provided in the vicinity, and the engaging teeth 9 of the operating portion 25 are engaged with the engaging protrusions 8 at the central portion of the through hole 4 in the left-right direction. Therefore, even if the rotating shaft 6 is inserted from either the left or right opening (4a or 4b) of the through-hole 4, it can be handled. Here, in the portable tool with a hook of this example, the hook handle 5 is attached to the housing 1 by inserting the rotating shaft 6 into the through hole 4 and screwing the cap material 7 onto the tip thereof. However, as described above, the hook handle 5 is appropriately replaced during the construction work. Therefore, when the hook handle 5 is replaced, the cap material 7 is not sufficiently tightened. Yes, when the construction work is continued without being noticed, the tightening of the cap material 7 to the rotating shaft 6 is loosened due to vibration or the like, and the cap material 7 comes off the rotating shaft 6. There is a fear.

  Here, in the conventional portable tool with a hook, as described in the background art, the member (screw 30) for attaching the hook handle 5 to the housing 1 such as the cap member 7 of this example has been removed. In this case, the hook handle 5 falls off the housing 1 immediately, and if this occurs in a state where the portable tool is hooked on the worker, the portable tool hooked on the worker falls. . However, in the portable tool with a hook of the present example, even if the cap material 7 is detached from the rotating shaft 6 with some beat, at least the portable tool is hooked on the operator (hook handle). 5), the hook handle 5 is prevented from falling from the housing 1, and the portable tool hooked by the operator is prevented from falling. That is, in the portable tool with a hook of this example, the retaining protrusion 10 is formed only when the hook handle 5 is housed as described above in the insertion structure of the rotary shaft 6 formed integrally with the hook handle 5 into the through hole 4. Since the hook handle 5 can be inserted into and removed from the housing 1 by being inserted into the notch 12, it is possible to prevent the hook handle 5 from being pulled out when the hook handle 5 is not stored, regardless of the presence or absence of the cap material 7. Since the strip 11 cannot pass through the notch 12, the retaining projection 10 is brought into contact with the vertical end surface of the retaining projection 11 on the back side of the through hole 4, so that the hook handle 5 cannot be removed from the housing 1. As a result, it is possible to eliminate the fall of the portable tool hooked by the worker from the worker, and the safety of the construction work can be ensured.

  Most portable tools such as electric tools such as cutters, drills, drivers, hammers, disc flyers, and air driven tools can be applied to the portable tools with hooks of the present invention.

It is a disassembled perspective view of the portable tool with a hook of the example of embodiment of this invention. It is a front view of the portable tool with a hook same as the above. (A) is a rear view of the portable tool with a hook same as the above with the battery removed, and (b) is a sectional view taken along the line CC of (a). It is an AA line sectional view of Drawing 2, explaining a stowed state of a hook handle same as the above. It is a use figure of a hook handle same as the above, and is a BB line sectional view of Drawing 2. It is a front view of the principal part of the portable tool with a hook of the state which removed the hook handle same as the above. It is a disassembled perspective view of the portable tool with a hook of the example of background art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Main body trunk part 3 Grip part 4 Through-hole 5 Hook handle 6 Rotating shaft 7 Cap material 8 Engaging protrusion 9 Engaging tooth 10 Retaining protrusion 11 Retaining protrusion 12 Notch

Claims (1)

A through-hole is drilled in the housing of the portable tool in which the main body body and grip are integrally formed, and the pivot shaft is integrally projected sideways from the hook handle that is hooked to the operator. The hook handle is pivotally attached to the housing by being inserted into the through hole and screwed onto the tip of the pivot shaft, and the engaging protrusion is projected radially outward on the circumferential surface of the pivot shaft. In addition, in the portable tool with a hook, the hook handle can be held or released at a predetermined rotational position with respect to the housing by engaging / disengaging the engaging protrusion with the engaging tooth arranged in the through hole. The hook handle fits in the housing within the pivoting range, and the retaining protrusion protrudes radially outward from the peripheral surface of the pivoting shaft, and the retaining protrusion extends around the through hole peripheral wall. Projecting radially inward and penetrating the pivot shaft In the state where it is inserted through the hole, the retaining protrusion is positioned deeper in the through hole than the retaining protrusion, and the retaining protrusion and the retaining protrusion can be contacted in the axial direction. With a hook that features a notch that penetrates in the direction and allows the retaining protrusion to be inserted, so that the retaining protrusion can be inserted into the notch only when the hook handle is in the retracted state Portable tool .

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