JP2012096299A - Auxiliary handle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently attach and detach an auxiliary handle to/from a power tool.SOLUTION: The problem is solved by the auxiliary handle with such a function that a handle includes a lever by which a ratchet mechanism inside the handle works to be attached to the power tool, and the handle also includes a knob which is turned to be removed from the power tool.

Description

  The present invention relates to an auxiliary handle. In particular, the present invention relates to an auxiliary handle that can be fixed to a power tool and attached to a power tool such as an electric tool or an engine tool and can be gripped by an operator.

  A general conventional auxiliary handle will be described with reference to FIGS. FIG. 1 is a perspective view showing a power tool to which an example of a conventional auxiliary handle is attached, and FIG. 2 is a cross-sectional view of an essential part as viewed in the direction C of FIG. As shown in the figure, the auxiliary handle includes a ring-shaped mount 3 having a notch 2, a bolt 5 fixed to the mount 3 through through holes 4 a and 4 b provided in communication with the mount 3, and the mount 3. A through hole 4c through which the bolt 5 can be inserted and communicated with the through hole 4a is provided. The mount 3 has a projecting portion 7 rotatably held, and a nut 6 screwed with the bolt 5 is fixed inside. The auxiliary handle can be attached to the electric tool body 1 by rotating the handle portion 8 and adjusting the screwed state of the bolt 5 and the nut 6. That is, when the handle portion 8 is rotated so that the nut 6 approaches the notch portion 2 side with respect to the bolt 5, the distance between the opposing surfaces 9a and 9b of the mount 3 constituting the notch portion 2 is narrowed, and the mount 3 becomes the electric tool. The auxiliary handle is attached to the electric power tool main body 1 while holding the main body 1. As a conventional example, a power tool is used as an example of a power tool, but the power tool is not limited to a power tool.

  When removing the auxiliary handle from the electric power tool body 1, the distance between the opposing surfaces 9a and 9b is increased by rotating the handle portion 8 in the direction opposite to that at the time of attachment, and the mount 3 is attached to the electric power tool body 1. This is done by reducing the pinching force.

Actually open 05-088882

  In the conventional auxiliary handle having the above-described configuration, the handle portion 8 is rotated and the interval between the notches 2 is adjusted to be attached to and detached from the electric tool main body 1. Operation while holding the tool body 1 by hand is difficult. For example, when trying to change the mounting angle of the auxiliary handle during work, the power tool body 1 is once placed on the floor and the handle portion is rotated. The workability was not good.

  An object of the present invention is to provide an auxiliary handle with good operability as a configuration capable of eliminating the above-mentioned drawbacks and easily adjusting the notch spacing.

  The above-described object includes a mount having an annular member, a first opposing surface connected to the annular member, and a second opposing surface connected to the annular member, and a handle connected to the mount. This can be achieved by an auxiliary handle provided with a lever which is provided so as to be movable with respect to the handle and which allows the distance between the first facing surface and the second facing surface to be close to each other. .

  According to the auxiliary handle for a power tool of the present invention, the work efficiency ratio can be improved by improving the operability of attachment to and removal from the power tool body.

The perspective view which shows an example of the conventional electric tool. FIG. 2 is a cross-sectional view of the main part as viewed in the direction C of FIG. The principal part sectional view showing one embodiment of the auxiliary handle of the present invention. Part A enlarged view of FIG. 1 is a cross-sectional view of the main part showing the operation of the auxiliary handle of the present invention. FIG. 2 is a cross-sectional view of the main part showing the operation of the auxiliary handle of the present invention. FIG. 3 is a cross-sectional view of the main part showing the operation of the auxiliary handle of the present invention.

  An embodiment of the auxiliary handle for a power tool according to the present invention will be described with reference to FIGS. The configuration of the auxiliary handle will be described with reference to FIGS.

  The handle 10 is divided into two parts and is fixed by a plurality of screws (not shown). A lever 11 is disposed on a fulcrum shaft A10a provided on the handle 10 so as to be rotatable. Except during operation, the lever 11 is held in place by a spring A12. A connecting rod 13 is disposed on the handle 10 so as to be pivotable. The connecting rod 13 contacts the lever 11 at a contact A14, and a push bar 16 is connected to the connecting rod 13 via a shaft 15. is doing. The end surface 16a of the ratchet holder A17 is in contact with the end surface 16a of the push bar 16, and the ratchet holder A17 can slide along the through hole 10c provided in the handle 10 and can further rotate in the axial direction. It is configured. The ratchet holder A 17 is provided with a ratchet A 18 and a ratchet spring 19, and the ratchet A 18 meshes with a tooth portion 20 a of the rack 20. At this time, when the ratchet A18 moves to the knob 21 side installed on the handle 10, it moves with the rack 20, and when the ratchet A18 moves to the mount 22 side, only the ratchet A18 moves. Configure the direction of the teeth.

  The ratchet holder A17 is provided with two joint pins 17b. The joint pins 17b are inserted into two holes 23a provided in the ratchet holder B23, and when the ratchet holder B23 rotates in the axial direction, The ratchet holder A17 is configured to rotate in conjunction with it. The ratchet holder B23 is provided with a ratchet B24 and a ratchet spring 25, and the ratchet B24 meshes with the tooth portion 20a of the rack 20. At this time, the ratchet B24 is free when the rack 20 moves to the knob 21 side, and configures the direction of the teeth of the ratchet B23 so that the rack 20 cannot move to the mount 22 side.

  A spring B26 is installed between the ratchet holder A17 and the ratchet holder B23. The spring B26 slides the push bar 16 toward the mount 22 so that the end surface 16a of the push bar 16 and the end surface 17a of the ratchet holder A17 are aligned. The ratchet holder A17 is configured to slide toward the mount 22 when the interval is opened.

  The ratchet holder B23 is rotatably installed in a through hole 10d provided in the handle 10. The ratchet holder B23 is provided with a convex portion 23b, so that the ratchet holder B23 can be rotated in the axial direction and does not slide in the through-hole direction. The ratchet holder B23 is provided with a knob 21. When the knob 21 is rotated, the ratchet holder B23 and the ratchet holder A17 are rotated in conjunction with each other. A rack 20 is slidably disposed on a sliding guide 10e provided on the handle 10, and the rack 20 is formed in a Y shape. A tooth 20a is provided on one side inside the Y shape, and a ratchet A18, a ratchet B24, It is configured to mesh.

  A female screw 20 b is provided on the mount 22 side of the rack 20 and is screwed into the bolt 27. The bolt 27 passes through a through hole 10f provided in the handle 10 and is fixed to the mount 22 through a through hole 22a, a spring C28, and a through hole 22b provided in the mount 22. The mount 22 has a ring shape with a notch 22c, and a spring C28 is disposed in the notch 22c. The mount 22 is configured to hold the protrusion 10 g of the handle 10.

  The operation of the auxiliary handle will be described with reference to FIGS. When the lever 11 is gripped according to FIG. 5, the lever 11 rotates in the α direction about the fulcrum axis A10a. Then, the contact point A14 of the lever 11 and the connecting rod 13 moves. As the contact A14 moves, the connecting rod 13 rotates about the fulcrum axis B10b. As the connecting rod 13 rotates, the push bar 16 connected to the connecting rod 13 and the ratchet holder A17 in contact with the push bar 16 slide in the β direction.

  When the ratchet holder A17 slides in the β direction, the distance between the ratchet holder A17 and the ratchet holder B23 is narrowed, and the spring B26 contracts. At this time, the ratchet holder B23 is pushed in the β direction by the spring B26, but the sliding movement of the ratchet holder B23 is restricted by the convex portion 23b of the ratchet holder B, so that it does not slide in the β direction.

When the ratchet A18 slides in the β direction, the rack 20 also moves in the β direction due to the engagement of the ratchet A18 and the rack teeth 20a. At the same time as the rack 20 moves in the β direction, the bolts 27 are pulled in the β direction, and the distance between the facing surface 22d and the facing surface 22e constituting the cutout portion 22c of the mount becomes narrow.
When the lever 11 is released from FIG. 6, the lever 11 is rotated in the θ direction about the fulcrum axis A10a to the original position by the spring A12. Then, the connecting rod 13 loses its contact with the lever 11 and becomes free. At the same time as the connecting rod 13 becomes free, the push bar 16 also becomes free in the sliding direction. Since the ratchet holder A17 is free in the ε direction due to the engagement of the ratchet A18 and the rack teeth 20a, the contracted spring B26 expands and slides the ratchet holder A17 in the ε direction. As the ratchet holder A17 slides, the push bar 16 slides and rotates until the connecting rod 13 contacts the lever 11. That is, when the lever 11 is returned, the components other than the rack 20 return to their original positions.

  By repeating the operation of grasping and releasing the lever 11 as described above, the distance between the facing surface 22d and the facing surface 22e of the notch portion of the mount 22 is reduced, and an unillustrated electric tool can be attached.

  When the knob 21 is rotated from FIG. 7, the ratchet holder B23 is rotated and the ratchet holder A17 connected by the joint pin 17b is also rotated. When the ratchet holder A and the ratchet holder B are rotated, the ratchet A18 and the ratchet B24 are disengaged from the rack teeth 20a, and the rack 20 becomes free in the sliding direction. When the rack 20 becomes free in the sliding direction, the contracted spring C28 expands to widen the gap between the facing surfaces 22d and 22e of the notch portion of the mount and slide the rack 20 in the ε direction. That is, when the knob 21 is rotated, the interval between the notch portion facing surface 22d and the facing surface 22e of the mount is instantly increased, and a power tool (not shown) can be removed.

  Power tools include electric tools driven by electric motors driven by batteries and commercial power supplies, engine tools driven by 2-cycle engines and 4-cycle engines such as gasoline and light oil, and compressed air supplied by a compressor. It can be applied to an air tool driven by the above.

1 Power tool body, 2 is a mounting notch portion of a conventional auxiliary handle, 3 is a mount, 4a, 4b, 4c are through holes, 5 is a bolt, 6 is a nut, 7 is a protrusion of the handle, 8 is a handle, 9a, 9b Is a facing surface constituting the mount notch, 10 is a handle of the present invention, 10a is a fulcrum shaft A, 10b is a fulcrum shaft b, 10c is a through hole, 10d is a through hole, 10e is a sliding guide, 10f is a through hole, 10g Is a handle protrusion, 11 is a lever, 12 is a spring A, 13 is a connecting rod, 14 is a contact A between the lever and the connecting rod, 15 is a shaft, 16 is a push bar, 16a is a push bar end surface, 17 is a ratchet holder A, 17a is a ratchet holder A end surface, 17b is a joint pin 18 is a ratchet A, 19 is a ratchet spring, 20 is a rack, 20a is a rack tooth, 20b is a female thread, 1 is a knob, 22 is a mount, 22a and 22b are through holes, 22c is a notch, 22d and 22e are facing surfaces, 23 is a ratchet holder B, 23a is a hole, 23b is a convex part, 24 is a ratchet B, and 25 is a ratchet A spring 26 is a spring B, 27 is a bolt, and 28 is a spring C.

Claims (5)

An annular member;
A mount having a first opposing surface connected to the annular member and a second opposing surface connected to the annular member;
A handle connected to the mount;
An auxiliary handle, comprising: a lever that is movably provided with respect to the handle and is capable of approaching a distance between the first facing surface and the second facing surface.   The auxiliary handle according to claim 1, wherein the lever is capable of operating a rack having teeth. An annular member;
A mount having a first opposing surface connected to the annular member and a second opposing surface connected to the annular member;
A handle connected to the mount;
An auxiliary handle comprising: a knob capable of separating a distance between the first facing surface and the second facing surface. The knob is rotatable,
The auxiliary handle according to claim 3, wherein the knob includes a ratchet having teeth in a part in a circumferential direction. A power tool having the auxiliary handle.