JP2014080278A - Power tool holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power tool holder capable of weakening a reaction force which an operator receives from a power tool.SOLUTION: A power tool holder comprises: a body (2) which rotates a rotation drum by a biasing force of a power spring housed therein and takes up a wire rope; an installation part (4) which swingably suspends the body (2) at an upper part of an operator; a telescopic part (3) on which a force contracting upward due to a tensile force of the wire rope acts, the telescopic part (3) extending downward from the body (2) to form a telescopic mechanism; and a tool attachment part (5) attached to a lower end of the telescopic part (3).

Description

  The present invention relates to a power tool holder for holding a nut runner and other power tools at a work site where an industrial product is assembled.

  Conventionally, there are spring balancers and wire reels that enable winding and unwinding of a wire rope using a mainspring spring.

  The spring balancer and the wire reel are used to suspend (suspend and hold) a tool, a work device, or the like in an operation of assembling an industrial product (see Patent Document 1).

JP 2006-103860 A

  With conventional spring balancers and wire reels, the operator can lightly raise and lower the tool, reduce fatigue during the work, hold the tool in the air, prevent scattering and fouling of the tool, and position of the tool The work becomes accurate by stabilizing.

  However, when using a tightening device such as an electric nutrunner, the conventional spring balancer only suspends the tightening device with a wire rope. It will take. When many tightening operations are performed with a power tool, the reaction force applied to the worker causes fatigue and injury of the worker, and decreases work efficiency and work safety.

  In view of such a problem, an object of the present invention is to provide a power tool holder capable of weakening a reaction force received by an operator from a power tool.

In order to solve the above problems, the present invention
Wire rope,
A rotating drum for winding the wire rope;
A mainspring spring that applies a biasing force to the rotating drum so that the rotating drum rotates in a direction to wind the wire rope;
A body case for housing the rotating drum and the mainspring spring;
Provided in the main body case, an installation part for installing the main body case in an arbitrary place;
A telescopic expansion and contraction part extending downward from the main body case, and a force to be contracted by the tension of the wire rope is acting;
There is provided a power tool holder having a tool mounting portion attached to a lower portion of the expansion / contraction portion and mounting a power tool.

  Preferably, the installation unit installs the main body case so as to be swingable.

Preferably, the expansion / contraction part is composed of a tubular member,
The tool mounting portion can rotate.

  Preferably, the tool mounting portion is mounted so as to be swingable in one direction.

  Preferably, the rotating drum is configured such that the winding diameter gradually decreases as the winding amount of the wire rope increases.

  Preferably, an adjustment mechanism for adjusting a tension applied to the wire rope is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the power tool holder which weakens the reaction force which an operator receives from a power tool can be provided.

It is a front view which shows the power tool holder which concerns on 1st Embodiment of this application. It is a front view which shows the use condition of the power tool holder which concerns on 1st Embodiment of this application. It is sectional drawing which shows the AA cut surface shown in FIG. 1 of the power tool holder which concerns on 1st Embodiment of this application. It is sectional drawing which shows three round pipes which comprise the expansion-contraction part of the power tool holder which concerns on 1st Embodiment of this application. (A) is the round pipe which comprises the front end side of an expansion-contraction part, (b) is the round pipe which comprises the intermediate part of an expansion-contraction part, (c) has shown the round pipe fixed to a main body. It is a front view which shows the main body and installation part of the power tool holder which concern on 1st Embodiment of this application. It is a left view which shows the main body and installation part of the power tool holder which concern on 1st Embodiment of this application. It is a bottom view which shows the main body of the power tool holder which concerns on 1st Embodiment of this application. It is a right view which shows the main body of the power tool holder which concerns on 1st Embodiment of this application. It is a top view which shows the main body of the power tool holder which concerns on 1st Embodiment of this application. It is a reverse view which shows the main body of the power tool holder which concerns on 1st Embodiment of this application. The power tool holder which concerns on 2nd Embodiment of this application is shown. (A) is the front, and (b) is the left side.

(First embodiment)
A power tool holder 1 according to a first embodiment of the present application will be described with reference to FIGS. 1 to 10.

  FIG. 1 is a front view showing a power tool holder 1 according to the first embodiment of the present application. Since the power tool holder 1 is long in the vertical direction, the intermediate part is omitted.

  The power tool holder 1 according to the first embodiment includes a main body 2, a telescopic portion 3 extending downward from the lower portion of the main body 2, and an installation portion 4 provided on the upper portion of the main body 2, and is mainly composed of metal. ing.

  When the power tool holder 1 is used, the tool attachment portion 5 is attached to the distal end of the expansion / contraction portion 3, but the configuration of the tool attachment portion 5 differs depending on the power tool to be used, so that it is indicated by a broken line. A tool attachment portion 5 indicated by a broken line in FIG. 1 can be used for a nut runner. An inverted Y-shaped member that is swingably attached to the distal end of the telescopic portion 3, and the inverted Y-shaped member. A V-shaped member provided corresponding to the lower portion is coupled with left and right bolts.

  The power tool holder 1 is hung with the installation part 4 fixed and hung on a horizontal member 6 or the like that is laid horizontally on the upper part of the operator, and the power tool is attached to the tool attachment part 5 for use. As a power tool, a power tool such as a tool used for tightening bolts and screws using mainly air, electric, and hydraulic pressure can be considered in addition to a nut runner.

  FIG. 2 is a front view showing a usage state of the power tool holder 1 according to the first embodiment. FIG. 2 shows a state in which the nut runner 7 is attached to the tool attachment portion 5. The expansion / contraction part 3 is configured to expand and contract, and as will be described later, a force to contract upward is applied to the expansion / contraction part 3, which is offset by the weight of the nut runner 7. The runner 7 can be moved lightly up and down. Moreover, since the front-end | tip of the expansion-contraction part 3 is comprised so that rotation is possible centering | focusing on the central axis of the expansion-contraction part 3, the user can change the direction of the horizontal direction of the nut runner 7. FIG. The tool mounting part 5 shown in FIG. 2 has shown the state which changed 90 degree | times with respect to the direction of the tool mounting part 5 of FIG.

  The tool mounting portion 5 is configured not to rotate in the direction of the reaction force applied to the power tool. Therefore, for example, when the operator performs the operation of tightening the nut with the nut runner 7 attached to the power tool holder 1, a large reaction force is generated at the same time as the completion of the tightening. 3, because the expansion / contraction part 3 resists the reaction force due to the bending rigidity, the reaction force applied to the worker is greatly reduced, and the worker's fatigue can be reduced and injury can be prevented.

  Next, returning to FIG. 1, the details will be described. Although the main body 2 is covered with the main body case 8, in FIG. 1, a part of the inside of the main body 2 is shown with a dashed-dotted line as a boundary. The main body 2 includes an openable / closable main body case 8, a substantially cylindrical rotating drum 9 housed in the main body case 8, a wire rope 10 wound around the rotating drum 9 and extending downward from the rotating drum 9, and a rotating drum 9, the mainspring 21 (see FIG. 3) that rotates the rotating drum 9 in the direction of winding the wire rope 10, and the outer peripheral surface of the rotating drum 9. And a release stopper 11 for preventing it from coming off. One end of the wire rope 10 is detachably fixed to the rotary drum 9, and a thimble is attached to the other end, and the wire rope 10 is connected to the extendable part 3 by the thimble. The reason why the wire rope 10 is fixed to the rotating drum 9 is to be removable when the wire rope 10 is deteriorated.

  FIG. 3 is a cross-sectional view of the power tool holder 1 according to the first embodiment, showing an AA cut surface indicated by a two-dot chain line in FIG. A center portion of the mainspring spring 21 is fixed to a core member 32 rotatably attached to the main body case 8, and an outer end portion is coupled to the rotary drum 9. The telescopic part 3 constitutes a telescopic mechanism by three round pipes having different diameters, and the wire rope 10 is connected to the upper part of the round pipe on the distal end side having the smallest diameter by a connecting part 12.

  FIG. 4 is a cross-sectional view showing three round pipes constituting the expansion / contraction part 3 of the power tool holder 1 according to the first embodiment. (A) is the thinnest diameter, shows a round pipe 13a that constitutes the distal end side of the stretchable part 3 when extended, (b) has an intermediate diameter dimension of the round pipe shown in (a) and (c), The round pipe 13b which comprises the intermediate part of the expansion-contraction part 3 at the time of expansion | extension is shown, (c) shows the round pipe 13c with the largest diameter and fixed to the main body 2, The display of the intermediate part of each round pipe is abbreviate | omitted doing.

  At the upper end of the round pipe 13a shown in FIG. 4 (a), a pipe-side connecting member 12a that constitutes a connecting portion 12 that connects the wire rope 10 and the round pipe 13a is provided. Further, a bracket member 14 having a pair of brackets is attached to the lower end portion of the round pipe 13a, and a pair of brackets are formed with through holes penetrating in the left-right direction in FIG. The above-described tool mounting portion 5 can be swingably mounted by a bolt through the hole. On the upper side of the bracket member 14, a shock absorbing rubber 15 is mounted for avoiding a collision between the bracket member 14 and the round pipe 13c when the telescopic portion 3 is contracted. For the description of the round pipe 13a, a state in which the bracket member 14 and the buffer rubber 15 are attached to the round pipe 13a is shown. However, in assembling the extendable part 3, the round pipe 13b is placed in the round pipe 13c. After inserting and inserting the round pipe 13a into the round pipe 13b, the buffer rubber 15 and the bracket member 14 are attached.

  A round stopper 13 is provided on the outer peripheral surface of the upper end portion of the round pipe 13b to prevent the round pipe 13b from falling out of the round pipe 13c. A stopper 17 is provided to prevent the stopper 17 from falling off. Further, a stopper 18 is provided on the inner peripheral surface of the lower end portion of the round pipe 13c to prevent the round pipe 13b from falling off the round pipe 13c. When the tip of the expansion / contraction part 3 is pulled downward by the weight of the operator or the power tool, the round pipe 13a is pulled out from the lower end of the round pipe 13b, and the pipe-side connecting member 12a comes into contact with the retaining member 17 and eventually comes into contact with the round pipe. 13 b is pulled out from the lower end of the round pipe 13 c, and the place where the stopper 16 comes into contact with the stopper 18 becomes the extended end of the stretchable part 3. The stoppers 16, 17 and 18 are preferably formed of an engineering plastic such as a polyacetal resin.

  In addition, in this invention, pipes other than a round shape, such as a triangle, a square, a pentagon, and a hexagon, can also be used instead of a round pipe. By using a round pipe, the tip of the expansion / contraction part 3 can rotate as described above, and the degree of freedom of movement of the power tool increases. However, when the power tool is tilted from the horizontal direction, the expansion / contraction part The rotation of the tip of 3 makes it difficult for the power tool holder 1 to resist the reaction force. By making the round pipe into a pipe with a cross-section other than round, the tip of the expansion / contraction part 3 does not rotate, so that even when a nut runner or the like is tilted from the horizontal direction, a large amount of reaction force can be borne. .

  FIG. 5 is a front view showing the main body 2 and the installation portion 4 of the power tool holder 1 according to the first embodiment. FIG. 6 is a left side view showing the main body 2 and the installation portion 4 of the power tool holder 1 according to the first embodiment. FIG. 7 is a bottom view showing the main body 2 of the power tool holder 1 according to the first embodiment. FIG. 8 is a right side view showing the main body 2 of the power tool holder 1 according to the first embodiment. FIG. 9 is a top view showing the main body 2 of the power tool holder 1 according to the first embodiment. FIG. 10 is a back view showing the main body 2 of the power tool holder 1 according to the first embodiment. In FIG. 5 to FIG. 10, the lower display from the stretchable part 3 is omitted.

  A ratchet 19 and a spindle 20 engaged with the ratchet 19 are provided near the front center of the main body 2. The spindle 20 is fixed to the core member 32 described above, and the user rotates the spindle 20 with a hexagonal bar spanner (not shown), thereby elastically deforming the mainspring spring 21 (see FIG. 3) to wire the rope. The magnitude of the tension applied to 10 can be adjusted. For example, if the tool attached to the tool attachment portion 5 is relatively heavy, the spindle 20 is rotated in a direction in which the tension applied to the wire rope 10 increases. By adjusting the tension applied to the wire rope 10 to the same level as the weight of the tool, the operator can lightly move the power tool up and down.

  In the first embodiment of the present application, as shown in FIG. 3, the rotating drum 9 having a cylindrical outer peripheral surface is used. Therefore, if the amount of unwinding of the wire rope 10 increases, the urging force of the mainspring spring 21 increases. Therefore, the tension applied to the wire rope 10 is also increased. Further, if the unwinding amount of the wire rope 10 is reduced, the urging force of the mainspring spring 21 is reduced, and the tension applied to the wire rope 10 is also reduced.

  In the present invention, like the conventional spring balancer, the outer peripheral surface of the rotating drum is formed into a conical surface, and a groove that is recessed radially inward is formed in the outer peripheral surface in a spiral shape. A wire rope can also be wound. According to this, the urging force that the mainspring spring gives to the rotating drum increases as the wire rope is pulled out by the user's operation or the like, but the outer peripheral surface of the rotating drum has a conical shape, so that The reaction force received gradually starts to be applied to the larger diameter side of the rotating drum, and gradually increases the torque to the rotating drum. Moreover, when a wire rope is wound up, it acts contrary to this. In this way, the change in the biasing force of the mainspring spring can be canceled by changing the position where the reaction force from the wire rope is applied to the rotating drum, so that a substantially constant tension can be generated regardless of the amount of unwinding. become. Therefore, the user can hold the power tool at an arbitrary height by adjusting the load with the spindle and suspending the weight and tension of the power tool.

  In the first embodiment, an upper cylindrical portion 22 extending upward is provided on the upper portion of the main body 2 as shown in FIGS. The upper cylindrical portion 22 is covered with an inverted U-shaped swing support member 23 from above, and a bolt 24 is inserted from the front side to the back side. The upper cylindrical portion 22 and the swing support portion 23 are shown in FIG. Are pivotably connected in the left-right direction.

  A through-hole penetrating in the left-right direction in FIG. 5 is formed in the upper part of the swing support member 23, and a cylindrical part 30 is inserted and attached rotatably by a snap ring 31. A bolt 25 is inserted into the cylindrical part 30 from the right side in FIG. 5, and a nut is screwed to the tip of the bolt 25. When the power tool holder 1 is used, the bolt 25 is passed through a through-hole formed in the horizontal member 6 or the like provided in the upper part of the operator, and the horizontal member 6 is interposed between the head of the bolt 25 and the cylindrical part 30. And so on. Accordingly, the swing support member 23 can swing in the left-right direction in FIG.

  By setting the installation part 4 in such a configuration, the main body 2 can swing in any direction, and the operator can move the power tool attached to the tip of the telescopic part 3 in any direction in the horizontal direction. You can move it. In the present invention, not only the above-described configuration but also other movable joints can be used.

  As shown in FIGS. 5 to 7, a lower cylindrical portion 26 is provided at a position directly below the upper cylindrical portion 22 at the lower portion of the main body 2. A through-hole (not shown) through which the wire rope 10 passes is provided in the portion of the main body case 8 surrounded by the lower cylindrical portion 26. Further, a round pipe 13 c constituting the extendable part 3 is fitted in the lower cylindrical part 26, and the round pipe 13 c is screwed to the lower cylindrical part 26.

  With the above configuration, when an operator attaches a power tool such as a nut runner to the tool mounting portion 5 of the power tool holder 1 according to the first embodiment of the present application and tightens the nut or the like, the reaction that occurs simultaneously with the completion of the tightening. The force is transmitted from the tool mounting portion 5 to the expansion / contraction portion 3, and the expansion / contraction portion 3 resists the reaction force by bending rigidity and reduces the burden on the user.

  On the left side surface of the main body 2, as shown in FIG. 5, an auxiliary hanger 27 having a hole through which a wire or the like can pass is provided. The auxiliary hanger 27 is connected to the horizontal member 6 and the like separately from the installation part 4 through a wire or the like, thereby preventing the power tool holder 1 from dropping due to damage to the installation part 4 or poor installation.

  As shown in FIG. 5, an annular projecting portion 28 is formed on the front surface of the main body 2. The protrusion 28 protrudes higher than the ratchet 19 and the spindle 20, and a disk-shaped cover 29 can be attached to the top of the protrusion 28.

(Second Embodiment)
Next, a power tool holder 40 according to a second embodiment of the present application will be described with reference to FIG. (A) is the front, and (b) is the left side.

  Since the power tool holder 40 according to the second embodiment is the same as the power tool holder 1 according to the first embodiment except for the expansion / contraction part 41 and the wire rope (not shown), the overlapping description is omitted. And the expansion-contraction part 41 and a wire rope are demonstrated.

  The telescopic part 41 of the power tool holder 40 according to the second embodiment is composed of four round pipes, and the length of each round pipe is shorter than the round pipes 13a to 13c according to the first embodiment. . The wire rope is shorter than the wire rope 10 according to the first embodiment.

  Thereby, the power tool holder 40 according to the second embodiment has a movable range in the upward direction of the power tool while shortening the overall length at the extended end as compared with the power tool holder 1 according to the first embodiment. It is spreading.

  As mentioned above, although embodiment of this invention was described, in this invention, the length of the expansion-contraction part in the state extended to the expansion | extension end can also be changed by changing the length of a wire rope and the number of round pipes. For example, the wire rope can be shortened to 2 pipes, or the wire rope can be lengthened to 5 pipes or more.

  Moreover, in this invention, the length of the expansion-contraction part in the state extended to the expansion | extension end can be changed also by changing the length of a wire rope and a pipe, without changing the number of pipes.

  Further, the number of pipes constituting the stretchable part can be changed without changing the length of the stretchable part in the state extended to the extended end. For example, the stretchable part can be formed from two long pipes, or the stretchable part can be formed from five or more short pipes. Even if the length of the expansion / contraction part at the extended end is the same, the tip of the expansion / contraction part can be moved upward by increasing the number of pipes, and the movable range in the vertical direction of the power tool can be widened. .

  In the above embodiment of the present invention, the main body can be swung in any direction, the tip of the telescopic part can be rotated, and the tool mounting part can be swung. Although the degree of freedom of movement is set high, a part of these movable parts or a certain direction of some of the movable parts can be fixed. According to this, although the freedom degree of a movement of a power tool becomes low, it becomes easier to resist the reaction force of a power tool, and the reaction force concerning an operator can be made small. For example, the tool mounting portion can be fixed so as not to swing, or the main body can be swung only in one direction.

  As mentioned above, according to this invention, the power tool holder which can weaken the reaction force which an operator receives from a power tool can be provided.

DESCRIPTION OF SYMBOLS 1, 40 Power tool holder 2 Main body 3, 41 Extension part 4 Installation part 5 Tool attachment part 6 Horizontal material 7 Nut runner 8 Main body case 9 Rotating drum 10 Wire rope 11 Detachment 12 Connection part 12a Pipe side connection members 13a, 13b , 13c Round pipe 14 Bracket member 15 Buffer rubber 16, 17, 18 Retaining stopper 19 Ratchet 20 Spindle 21 Mainspring spring 22 Upper cylindrical portion 23 Swing support member 24, 25 Bolt 26 Lower cylindrical portion 27 Auxiliary hanger 28 Protruding portion 29 Cover 30 Cylindrical part 31 Snap ring 32 Core member

Claims (6)

Wire rope,
A rotating drum for winding the wire rope;
A mainspring spring that applies a biasing force to the rotating drum so that the rotating drum rotates in a direction to wind the wire rope;
A body case for housing the rotating drum and the mainspring spring;
Provided in the main body case, an installation part for installing the main body case in an arbitrary place;
A telescopic expansion and contraction part extending downward from the main body case, and a force to be contracted by the tension of the wire rope is acting;
A power tool holder, comprising: a tool mounting portion attached to a lower portion of the expansion / contraction portion, to which a power tool is attached.   The power tool holder according to claim 1, wherein the installation unit installs the main body case in a swingable manner. The stretchable part is composed of a tubular member,
The power tool holder according to claim 1, wherein the tool mounting portion is capable of rotating.   The power tool holder according to any one of claims 1 to 3, wherein the tool mounting portion is mounted so as to be swingable in one direction.   The power tool holding according to any one of claims 1 to 4, wherein the rotating drum is configured so that a winding diameter gradually decreases as the winding amount of the wire rope increases. vessel.   The power tool holder according to any one of claims 1 to 5, further comprising an adjustment mechanism for adjusting a tension applied to the wire rope.

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