JP5117929B2 - Side handle for power tool and power tool - Google Patents

Description

  The present invention relates to a power tool side handle mounted on a power tool such as a hammer drill or a hammer, and a power tool including the side handle.

  In an electric power tool such as a hammer drill, a main handle is connected to the rear of a cylindrical main body on which a bit is mounted at the front end, and a side handle is provided at a front portion of the main body. As shown in Patent Document 1, this side handle has a pair of base ends of a ring-shaped mounting portion capable of gripping an electric tool between a pair of free ends of a U-shaped handle portion, and a handle. A cam with cam surfaces formed on both front and rear sides is arranged between the free end of the mounting part and the base end of the mounting part, and is detachably attached to the free end side in a rotationally stopped state. A similar cam surface is formed on the surface, and a free end including the cam and a base end are axially attached with bolts. Here, when the operation knob provided on the bolt is loosened, the cam surfaces are allowed to get over and the angle of the handle portion with respect to the mounting portion can be adjusted. Then, when the operation knob is screwed in, the interval between the free ends is narrowed and the mounting portion is contracted, the electric tool is gripped, and the handle portion can be fixed at the angle by the engagement of the cam surfaces. Further, in this side handle, when one cam surface of the cam is worn, the other new cam surface can be used by turning the cam over.

JP 2000-176864 A

  However, in the side handle of Patent Document 1, the position of the mounting portion via the cam between the free ends of the handle portion is constant, so that the handle portion protrudes to the left or right with respect to the main body of the electric tool. When it is fixed horizontally, the vertical position of the handle portion with respect to the axis of the main body is also constant. However, depending on the work content, the operator's preference, the type of power tool, etc., the operability and usability may be deteriorated at the position of the fixed handle portion. In addition, different types of side handles may be required for each type of electric tool, resulting in increased manufacturing and management costs.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a power tool side handle and a power tool that can change the position of the handle portion with respect to the mounting portion, are easy to use, and lead to cost reduction.

In order to achieve the above object, the invention according to claim 1 is a side handle for an electric power tool, wherein at least one of the two free ends of the handle portion and the proximal end of the mounting portion are adjacent to each other. A spacer is detachably mounted between the end and the base end, and the position of the handle portion relative to the mounting portion can be changed along the axis by selecting the mounting position of the spacer. .
According to the second aspect of the present invention, in the configuration of the first aspect, the rotation of the handle portion can be reliably controlled even if a spacer is provided, and the life of the spacer is increased, so that the free end and the base end A cam surface that engages with each other when both base ends are fixed by the tightening means is formed on the opposing surface, and cam surfaces that are the same as the cam surface are formed on both front and rear surfaces in the axial direction of the spacer. To do.
According to a third aspect of the present invention, in the configuration of the first or second aspect, in order to further improve the operability and the usability, a plurality of spacers are provided, and the handle portion is selected by selecting the mounting position of each spacer. It is characterized in that three or more positions can be changed.
In order to achieve the above object, the invention according to claim 4 is formed by mounting the side handle for an electric tool according to any one of claims 1 to 3 on a cylindrical main body in which a bit is mounted at the tip. It is a power tool.

According to invention of Claim 1 and 4, the position of a handle | steering-wheel part can be selected according to work content, an operator's liking, the model of an electric tool, etc., and operativity and usability are improved and it is excellent in usability. Further, since the same side handle can be applied to a plurality of models, it is possible to expect cost reduction related to manufacturing and management by sharing parts and the like. In addition, the balance of appearance is improved and the design is improved.
According to the second aspect of the present invention, in addition to the effect of the first aspect, the cam surface is formed, so that the rotation of the handle portion can be reliably restricted even if the spacer is provided. Further, since the cam surfaces are on both the front and rear surfaces, the cam surface on the opposite side can be used when the cam surface meshing with the base end is worn or the like, and the life of the spacer can be extended.
According to the third aspect of the present invention, in addition to the effect of the first or second aspect, variations in the position of the handle portion are increased, and it is possible to respond more precisely to the needs of the operator. Therefore, it leads to the further improvement of operativity and usability.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Form 1]
FIG. 1 is a front sectional view showing an example of a side handle for an electric tool (hereinafter simply referred to as “side handle”). The side handle 1 is attached to a cylindrical main body T of a hammer drill as an electric tool. A ring-shaped mounting portion 2 and a handle portion 4 connected to the mounting portion 2 via a bolt 3 serving as a shaft.
First, the mounting portion 2 is formed by connecting one ends of strip-shaped clamp plates 5 and 5 formed in a semicircular shape to each other by pins 6, and a cylindrical base end 7 is connected to the other end of each clamp plate 5. However, they are arranged in a direction in which the opening sides face each other.

On the other hand, the handle portion 4 is U-shaped with free ends 8 and 8 parallel to each other at both ends. A grip 9 is formed at the base end, and the base of the mounting portion 2 is between the free ends 8 and 8. Ends 7 and 7 are located. Note that the free end 8 here has a tip portion with a thickness on the lower side in FIG. 1 larger than that on the upper side.
Spacers 10 and 11 are disposed between the adjacent free end 8 and the base end 7. The spacers 10 and 11 are ring bodies that are fitted to the prisms 12 projecting from the inside of the free end 8 and are detachably attached to the free end 8. Here, the spacers 10 and 11 are lower than the upper spacer 10. The spacer 11 is longer in the axial direction. Further, on both front and rear surfaces in the axial direction of the spacers 10 and 11, cam surfaces 13 are formed in which angled engagement claws 14, 14... Whose ridgelines extend radially from the center are projected at equal intervals in the circumferential direction. Has been. The cam surface 13 is also formed on the surface facing the spacers 10 and 11 at the base end 7 of the mounting portion 2 in the same manner.

  The bolt 3 passes from the upper free end 8 through the spacer 10, the base ends 7, 7, the spacer 11, and the lower free end 8, and projects the screw portion 15 downward. Is fitted to a regular hexagonal recess 17 recessed in the outer surface of the free end 8 to prevent rotation. Reference numeral 18 denotes an operation knob that forms a tightening means together with the bolt 3, and a nut 19 incorporated therein is screwed into the screw portion 15 of the bolt 3. Therefore, when the operation knob 18 is screwed in from the position where it abuts on the lower free end 8, the distance between the upper and lower free ends 8, 8 can be reduced, and when the operation knob 18 is rotated in the loosening direction, the free end 8 and 8 are restored to their original positions parallel to each other due to their elasticity, and the interval is widened.

In the side handle 1 configured as described above, if the base ends 7 and 7 are moved along the bolts 3 in the direction away from each other while the operation knob 18 is loosened, the distance between the clamp plates 5 and 5 is also increased. It opens and the inner diameter of the mounting portion 2 is expanded. Therefore, the main body T on which the bit is mounted at the tip can be inserted into the mounting portion 2.
When the operation knob 18 is screwed from here, the space between the free ends 8 and 8 is reduced, and the distance between the base plates 7 and 7 and the clamp plates 5 and 5 is also reduced, and the inner diameter of the mounting portion 2 is reduced. Therefore, the mounting portion 2 is fixed to the main body T. At the same time, since the spacers 10 and 11 are pressed toward the adjacent base end 7 side, the opposing cam surfaces 13 are engaged with each other to be prevented from rotating, and the handle portion 4 is fixed at a position protruding sideways from the main body T. Is done. In this state, the handle part 4 is positioned downward with respect to the mounting part 2, and the vertical direction is between a horizontal line L1 passing through the axis of the main body T and a horizontal line L2 passing through the center of the handle part 4. There is a difference in the distance S.

In this state, the operator can support the hammer drill by holding the main handle behind the hammer drill with one hand and holding the grip 9 of the side handle 1 with the other hand.
When the operation knob 18 is loosened, the free ends 8 and 8 of the handle portion 4 return to the original position where the interval is widened. Therefore, when the handle portion 4 is pressed in either the front or rear direction, the cam surface 13 is engaged. Since the engaging claws 14 get over each other and allow the spacers 10 and 11 to rotate, the handle portion 4 can be rotated around the bolt 3 to an arbitrary position. After the positioning, the operation knob 18 may be screwed again to fix the handle portion 4.

When it is desired to change the vertical position of the handle portion 4, the operation knob 18 is loosened and removed from the bolt 3, the bolt 3 is removed from the side handle 1, and the upper and lower spacers 10 and 11 of the handle portion 4 are respectively shown in FIG. And the bolt 3 is inserted again and the operation knob 18 is screwed. Then, as shown in FIG. 2, because the longer spacer 11 has moved upward, the handle portion 4 moves upward with respect to the mounting portion 2, and the handle portion 4 has a line L <b> 1 passing through the axis of the main body T. It becomes the center position where the line L2 passing through the center matches.
1 and 2, if the engagement claw 14 is damaged or worn on the cam surface 13 on the engagement side with the base end 7 of the spacer 10, 11, the spacer 10 The opposite cam surface 13 may be engaged with the base end 7 by changing the front and back sides.

As described above, according to the side handle 1 and the hammer drill of the first embodiment, the spacers 10 and 11 are detachably mounted between the free end 8 and the base end 7, and the mounting positions of the spacers 10 and 11 are changed. By selecting, the position of the handle part 4 relative to the mounting part 2 can be changed along the bolt 3, so that the position of the handle part 4 can be selected according to the work contents, the operator's preference, the model of the electric tool, Usability and usability are improved and it is easy to use. In addition, since the same side handle 1 can be applied to a plurality of models, parts and the like can be shared and cost reduction related to manufacturing and management can be expected.
Furthermore, since the balance of appearance is improved by changing the position of the handle portion 4 (particularly in the center position), the design can be improved.

  In particular, here, cam surfaces 13 are formed on the opposing surfaces of the free end 8 and the base end 7 so as to engage with each other when the base ends 7 and 7 are fixed by the operation knob 18 to restrict the rotation. Since the cam surfaces 13 that are the same as the cam surfaces 13 are formed on both the front and rear surfaces in the axial direction, the rotation of the handle portion 4 can be reliably controlled even if the spacers 10 and 11 are provided. In addition, since the cam surfaces 13 of the spacers 10 and 11 are on both front and rear surfaces, the cam surface 13 on the opposite side can be used when the cam surface 13 that meshes with the base end 7 wears, and the life of the spacers 10 and 11 can be increased. It can be lengthened.

Next, another embodiment will be described. In addition, the same code | symbol is attached | subjected to the same structure part as the form 1, and the overlapping description is abbreviate | omitted.
[Form 2]
In the side handle 1 a shown in FIG. 3, the upper spacer 10 is the same as in the first embodiment, but the lower spacer is divided into two in the axial direction and has the same axial length as the spacer 10. The spacer 20 has cam surfaces 13 and 13 formed thereon, and the spacer 21 has a longer axial direction than the spacer 20 and has cam surfaces 13 and 13 formed on both front and rear surfaces. At the center of one cam surface 13 of the spacer 21, a prismatic part 22 into which the spacer 20 is fitted is projected. Therefore, both can be integrated by fitting the spacer 20 to the prism portion 22 of the spacer 21, and both can be separated separately by being removed from the prism portion 22.

In the side handle 1a configured as described above, as shown in FIG. 3A, the spacer 10 is disposed on the upper side of the mounting portion 2, and the spacers 20 and 21 are disposed on the lower side of the mounting portion 2, and the operation knob 18 is provided. When screwed, the line L2 is positioned below the line L1, and the handle portion 4 is fixed to the mounting portion 2 closer to the lower side.
On the other hand, in order to change the vertical position of the handle portion 4, the operation knob 18 is loosened and the bolt 3 is removed, and the lower spacer 21 is fitted to the prism portion 12 of the upper free end 8, so 10 is fitted, the bolt 3 is inserted again, and the operation knob 18 is screwed (even if the spacer 10 and the spacers 20 and 21 are replaced as they are). Then, as shown in FIG. 7B, the handle portion 4 moves upward with respect to the mounting portion 2 because the longer spacer 21 moves upward, and the center where the line L1 and the line L2 coincide with each other. Position.

  Thus, also in the side handle 1a and the hammer drill of the above-described form 2, the position of the handle portion 4 can be selected according to the work content, the operator's preference, the type of the electric tool, etc., and the operability and usability are improved. And easy to use. Further, since the cam surfaces 13 are formed on both the front and rear surfaces in the axial direction in the spacers 10 and 20, the lifetime of each spacer can be extended as in the first embodiment. Furthermore, cost reduction and design improvement by applying to multiple models can be obtained as well.

[Form 3]
In the side handle 1b shown in FIG. 4, the upper spacer 10 is the same, the thickness of the lower free end 8 is reduced, and the lower spacer is divided into three in the axial direction. The spacer 23 has a length in the axial direction longer than that of the spacer 23, and two spacers 24, 24 having cam surfaces 13, 13 formed on both front and rear surfaces. Here, the prisms 25 are formed on the spacers 24, respectively. Therefore, the spacers 24 are integrated with each other by fitting the other spacer 24 to one prism 25 and fitting the spacer 23 to the prism 25 of the upper spacer 24, and are removed from the prism 25. Can be separated separately.

In the side handle 1b configured as described above, as shown in FIG. 4A, the spacer 10 is disposed on the upper side of the mounting portion 2, and the spacers 23 and 24 are disposed on the lower side of the mounting portion 2, and the operation knob 18 is provided. When screwed, the line L2 is positioned below the line L1, and the handle portion 4 is fixed to the mounting portion 2 closer to the lower side.
On the other hand, in order to change the vertical position of the handle portion 4, the operation knob 18 is loosened, the bolt 3 is pulled out, and one of the lower spacers 24 is fitted to the rectangular column portion 12 of the upper free end 8 to be fitted to the rectangular column portion 25. Then, the spacer 10 is fitted, the bolt 3 is inserted again, and the operation knob 18 is screwed (even if the spacer 10 and the spacers 23 and 24 are replaced as they are). Then, as shown in FIG. 7B, the handle 24 is moved upward with respect to the mounting portion 2 because the longer spacer 24 is moved upward, and the center where the line L1 and the line L2 coincide with each other. Position.

Then, if the lower spacer 24 on the lower side is moved upward from the state shown in FIG. 5B, the handle portion 4 moves further upward relative to the mounting portion 2 as shown in FIG. The line L2 can be positioned higher than the line L1.
Of course, the change from FIG. 4A to FIG. 4C is also possible. In this case, if only the spacers 24 and 24 are moved upward, or the spacer 10 and the spacers 23 and 24 are replaced as they are. Good.

Thus, also in the side handle 1b of the above-mentioned form 3, the position of the handle portion 4 can be selected according to the work contents, the operator's preference, the type of the electric tool, etc., and the operability and the usability are improved for ease of use. Excellent. Further, since the cam surfaces 13 are formed on both the front and rear surfaces of the spacers 10 and 23, the lifetime of each spacer can be extended as in the first and second embodiments. In addition, it can be expected to reduce costs and improve design by applying to multiple models.
In particular, the position of the handle portion 4 can be changed in three places by selecting the mounting position of the plurality of spacers 10, 23, 24. Therefore, variations in the position of the handle portion 4 are increased, and the needs of the operator can be dealt with in detail. it can. Therefore, it leads to the further improvement of operativity and usability.

The number and shape of the spacers are not limited to those described above, and the position of the handle portion can be changed more finely at four or more locations by increasing the number of divisions or changing the axial thickness. In the above embodiment, the spacer has cam surfaces formed on both front and rear surfaces in the axial direction. However, only one of the spacers may be used, or the cam surface may be omitted if the rotation can be restricted only by tightening means.
In addition, the form of the mounting part and the handle part is not limited to the above-mentioned contents. For example, the position of the operation knob is turned upside down as well as a change in which the ring-shaped part of the mounting part is used as a band plate, or unevenness such as dimples is provided on the grip. It is also possible to change the position of the handle portion with respect to the mounting portion or to reverse the left and right.

And in the said form, although the spacer is provided in two places where the free end of a handle part and the base end of a mounting part adjoin, a spacer is arranged only between any one free end and a base end, It is also conceivable to change the position of the handle portion relative to the mounting portion by changing the mounting position of the spacer between the free end and the base end on the other side. Further, the spacer is not limited to the ring body, and for example, if the cross section is C-shaped with an axial slit formed on the side surface and is fitted and detached from the side surface with respect to the bolt, the spacer can be easily attached and detached.

It is explanatory drawing of the side handle of the form 1 (a handle | steering-wheel part is a downward position). It is explanatory drawing of the side handle of the form 1, and has shown the handle part in the center position. It is explanatory drawing of the side handle of the form 2, (A) shows the downward position of a handle part, (B) shows a center position, respectively. It is explanatory drawing of the side handle of the form 3, (A) shows the lower position of a handle part, (B) shows a center position, (C) shows an upper position, respectively.

Explanation of symbols

  1, 1a to 1b ··· Side handle for electric tool, 2 ·· Mounting portion, 3 · Bolt, 4 ·· Handle portion, 7 ·· Base end, 8 ·· Free end, 9 ·· Grip, 10, 11 , 20, 21, 23, 24, spacer, 12, 22, prismatic part, 13 ... cam surface, 14 ... engaging claw, 18 ... operation knob.

Claims (4)

Between a pair of free ends of a U-shaped handle portion whose center is a grip, a pair of base ends of a ring-shaped mounting portion to be mounted on the main body of the electric tool is disposed, and the free end and the base end A side handle for an electric tool provided with fastening means for fixing the base ends between the free ends by arbitrarily narrowing a distance between the pair of free ends to the handle portion. ,
A spacer is detachably mounted between at least one of the free end and the base end adjacent to the free end and the base end, and the mounting portion is selected by selecting a mounting position of the spacer. A side handle for an electric tool, wherein the position of the handle portion with respect to can be changed along the axis.   Formed on opposite surfaces of the free end and the base end are cam surfaces that engage with each other when the base ends are fixed by the tightening means to restrict rotation, and on the front and rear surfaces of the spacer in the axial direction, The side handle for an electric power tool according to claim 1, wherein the cam surface is the same as the cam surface.   The side handle for a power tool according to claim 1 or 2, wherein a plurality of the spacers are provided, and three or more positions of the handle portion can be changed by selecting a mounting position of each spacer.   A power tool comprising a cylindrical main body having a bit attached to a tip thereof and the side handle for a power tool according to any one of claims 1 to 3.

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