JP3665386B2 - Grip angle adjustment device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a grip angle adjusting device, and is applied to a grip of tools such as a polisher, a drill, and a grinder, for example.
[0002]
[Prior art]
With the recent spread of automobiles, it has become common to perform a wax treatment on a vehicle body. However, a polisher is used as a tool for assisting operations from such wax application to wiping and further polishing.
For example, as shown in FIG. 9, the polisher 1 has a drive electric motor built in a housing 1a having a main grip 1c and a sub grip 1e, and is provided at the tip of an output shaft 1f of the electric motor. A buff 3 made of sponge, mop or the like is attached to the coupler 2.
When actually polishing the surface of the body of an automobile or the like, a polishing agent or a wax agent is applied to the buff surface of the polisher 1, and the buff 3 is moved forward or backward by holding the main grip 1c and the sub grip 1e. While continuously rotating in one direction, this buff surface is pressed against the body surface to perform the polishing operation.
[0003]
[Problems to be solved by the invention]
However, according to such a conventional polisher, the mounting angle of the main grip and the subgrip is generally fixed so as to be substantially perpendicular to the output shaft. Depending on individual differences such as the size of the hand, grips may be difficult to grip and may be tired due to unnecessary force. In addition, when the work space on the surface to be polished is narrow, the grip may interfere with the work.
On the other hand, it is conceivable that the grip is bent in the shape of “K” in advance and attached to the body of the tool with bolts or the like. At the same time, since the tip of the folded grip rotates together, there is a problem that the bending direction of the grip is difficult to adjust to a fixed position.
As another means for adjusting the grip angle, it is conceivable that the grip angle can be freely changed by a ball joint or the like. Generally, however, the reaction force of the buff rotation is applied to the base of the grip during the polishing operation. Since it is easy to concentrate stress and to be affected by vibration or the like, the ball joint has a problem that it is difficult to stably hold the grip at a predetermined set angle.
[0004]
The present invention has been made to solve such problems. The grip angle of the grip can be freely changed, and the set angle is prevented from being displaced due to vibration or the like. It is intended to improve work efficiency by making it possible to easily realize a general work posture.
[0005]
For this purpose, the grip angle adjusting device of the present invention is provided with a grip body at a predetermined position of the housing of the tool via a grip base, and the grip base is surrounded by a cylindrical body having a side surface. A grip angle in which one end of the body is constituted by a support plate and the other end is constituted by a bottom plate, and the bottom plate is fixed to a predetermined position of a tool housing and the grip body is connected to the support plate. In the adjusting device, the support plate is formed with a dome-shaped curved surface, an enlarged hole is formed in the center portion of the support plate, and an external dish plate is provided circumscribing the support plate, A grip angle fixing bolt is fixed to the grip base side in the axial direction of the grip body, and a nut is housed inside the grip base, and the grip angle fixing bolt is The external dish plate is provided so as to be slidable with respect to the curved surface of the support plate by being inserted into the enlarged hole of the support plate through the external plate and screwed into the nut. Features. Further, the grip angle adjusting device of the present invention is characterized in that an uneven portion is formed on a contact surface between the support plate and the external dish plate.
[0006]
[Action]
According to the grip angle adjusting device of the present invention, by rotating the grip angle fixing bolt to loosen the tightening force of the fixing nut, the external dish plate can slide on the dome-shaped curved surface of the grip base, The grip angle is adjusted.
That is, when changing the grip angle, if the grip body and the grip angle fixing bolt are rotated together in the loosening direction, the fixing nut is loosened, and the external plate and the support plate are tightened. At this time, when the external dish plate is slid along the curved surface of the support plate, the grip angle fixing bolt is tilted so as to become a predetermined angle within the range of the enlarged hole, and the grip angle of the grip body is changed.
After the grip angle is determined, when the grip body and the grip angle fixing bolt are rotated in the tightening direction, the external dish plate and the fixing nut are tightened to the support plate, and the grip body is fixed at a constant angle.
[0007]
Further, when an annular convex portion is provided at the tip of the grip angle fixing bolt, the fixing nut is prevented from rotating too much in the loosening direction and falling off when the grip angle fixing bolt is loosened.
In addition, if uneven portions are formed on the contact surface between the support plate and the external dish plate, the friction coefficient of each contact surface increases, so the tightening force of the grip angle fixing bolt increases and the stability of the grip body is further improved. To do.
[0008]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
A first embodiment of the present invention is shown in FIGS. In this embodiment, the grip angle adjusting device is applied to a sub-grip of a polisher.
As shown in FIG. 1, the polisher 10 incorporates a drive motor 10b in an insulating housing 10a, and includes a main grip 10c and a switch 10d on the side surface of the housing 10a, and a sub grip 10e on the left side surface thereof. A power cord 12 is taken out from the rear end of the main grip 10c. An output shaft 10f of the drive motor 10b protrudes in front of the housing 10a, and a buff 14 can be detachably attached to a coupler 13 provided at the tip of the output shaft 10f.
[0009]
As shown in FIG. 2, the grip angle adjusting device 15 includes a grip base 16, an external dish plate 17, an internal dish plate 18, a grip angle fixing bolt 19, a grip body 20, and a fixing nut 21. A bottom plate 16 a of the grip base 16 is fixed to a predetermined position of the housing 10 a by a bolt 23 and a nut 24. A grip angle fixing bolt 19 extending in the axial direction of the grip body 20 is attached to the upper portion of the grip base 16 by an external dish plate 17, an internal dish plate 18, and a fixing nut 21 at a predetermined angle.
[0010]
The grip base 16 has a cylindrical cylinder 16b raised from the outer peripheral end of the bottom plate 16a, and one end of the cylinder 16b is constituted by a support plate 16c having a dome-shaped curved surface. An enlarged hole H is provided at the center of the support plate 16c, and the grip angle fixing bolt 19 is inserted into the enlarged hole H. The outer plate 17 and the inner plate 18 are respectively provided on the outer side and the inner side of the support plate 16c. When the grip angle fixing bolt 19 is tightened, the fixing nut 21 is connected to the outer plate 17 and the inner plate 18 by the support plate 16c. Is to be held. As materials for the grip base 16, the external dish plate 17, and the internal dish plate 18, for example, iron, aluminum, ceramic, or the like is used.
[0011]
The outer dish plate 17 and the inner dish plate 18 are disk-shaped in which the central portion is swollen, and a grip angle fixing bolt 19 is inserted into a through hole in the center of these dish plates.
The contact surfaces of the outer plate 17 and the inner plate 18 and the support plate 16c are slidable on the dome-shaped curved surface of the support plate 16c. When the grip angle fixing bolt 19 is tilted, the contact surface follows. To move.
Further, the fixing nut 21 and the internal countersink 18 are bonded together by welding or the like, and when the grip angle fixing bolt 19 is rotated, the internal countersink 18 is fastened to the support plate 16c side.
[0012]
The size of the enlarged hole H is sufficiently larger than the outer diameter of the grip angle fixing bolt 19 and is formed so as to maintain a predetermined distance between the inner periphery of the hole and the peripheral surface of the bolt. On the other hand, the plate areas of the external dish plate 17 and the internal dish plate 18 are formed so as to sufficiently cover the enlarged hole H.
[0013]
The grip body 20 is provided with a grip angle fixing bolt 19 in a direction coinciding with the central axis thereof, and the grip angle fixing bolt 19 can be rotated by turning the grip body 20 around the axis. . Further, an annular convex portion 19 a having a diameter larger than the bolt diameter is formed at the tip end portion of the grip angle fixing bolt 19, and the fixing nut 21 is prevented from being detached from the grip angle fixing bolt 19.
The grip surface of the grip body 20 is covered with a non-slip protective material such as rubber or resin so that an operator can easily grip the grip.
[0014]
When using the polisher 10, first, the power cord 12 connected to the driving motor 10b is connected to a commercial power source, and a buff 14 is attached to the coupler 13 at the tip of the rotating shaft 10f of the housing 10a. Apply wax, abrasive, etc. to the treated surface. Next, when the switch 10d is turned on with the main grip 10c and the sub grip 10e, the rotating shaft 10f of the driving motor 10b rotates, and the buff 14 rotates accordingly.
The operator holds the main grip 10c and the sub grip 10e, applies the buff surface to the surface to be polished, moves the buff 14 in a predetermined direction, and performs operations such as waxing.
[0015]
Here, when the operator changes the grip angle of the sub grip 10e, the grip angle can be adjusted as follows.
First, when the grip body 20 is rotated in the counterclockwise direction around the axis, the fixing nut 21 is loosened from the grip angle fixing bolt 19 and the clamping force of each of the plate plates 17 and 18 is reduced. Next, when the tightening force of each of the plate plates 17 and 18 is loosened appropriately, the grip body 20 is tilted in a predetermined direction to adjust the grip shaft to a desired angle. At this time, as shown in FIG. 3, each of the dish plates 17 and 18 moves according to the angle of the grip angle fixing bolt 19 while sliding on the outer wall surface and the inner wall surface of the support plate 16c.
When the grip angle is determined, when the grip body 20 is rotated clockwise, the grip angle fixing bolt 19 is fitted in the tightening direction of the fixing nut 21 against the inertial force of the fixing nut 21. Thereby, the internal dish plate 18 is fastened to the support plate 16c side, the clamping force of each dish plate is increased, and the grip shaft is fixed at a fixed position.
[0016]
As described above, according to the grip of the above embodiment, the grip angle can be easily adjusted by rotating the grip body 20, so that it is possible to easily realize the work posture suitable for the user's body shape. it can.
For example, in the case of a person with a long reach, as shown by an arrow A in FIG. 1, the polisher 10 can be easily operated by tilting the sub grip 10e toward the front side of the output shaft. Further, as shown in FIG. 1 arrow B, if the tilt is made to the rear side of the output shaft 10f, the burden on the arm when the polisher is operated can be reduced due to the moment acting on the grip.
Further, according to the embodiment, as shown in FIG. 4, the grip shaft can be inclined in a desired direction within the range of the enlarged hole H, so that the angle formed by the main grip and the sub grip can be changed. It can also be narrowed or widened.
[0017]
Next, a second embodiment of the present invention is shown in FIGS.
In the grip angle adjusting device 30 according to the second embodiment, a countersunk nut 31 is fitted to the grip angle fixing bolt 19.
The dish-shaped nut 31 is formed by forming a metal plate such as iron into a dome shape, and is slidable on the inner surface of the support plate 16c. A nut groove 31 a that fits the grip angle fixing bolt 19 is formed at the center of the dish-shaped nut 31.
When the grip angle fixing bolt 19 is loosened, the support plate 16c is tightened by the dish-shaped nut 31 and the external dish plate 17, and the grip angle can be adjusted within the range of the enlarged hole H as shown in FIG. . Further, when the grip angle fixing bolt 19 is tightened to the dish-shaped nut 31, the dish-shaped nut 31 and the external dish plate 17 sandwich the support plate 16c to fix the grip angle.
When the dish-shaped nut 31 is used in this way, the inner dish plate and the fixing nut of the first embodiment are configured as one part, and the number of parts stored in the grip base 16 is reduced. The length of the cylindrical body 16b of the base 16 can be shortened, and a compact device configuration can be realized.
[0018]
Further, the grip angle adjusting device 30 of the second embodiment is configured to attach the bolt 33 to the grip mounting screw hole 10g of the housing 10a. Bolts 33 pass through the bottom plate 35 of the grip base 16 and are fastened by nuts 34. In the radial direction of the nut 34, a horizontal screw 34 a that extends into the nut hole and is pressed against the side surface of the bolt 33 is provided to prevent the bolt 33 from spinning around the bottom plate 35. Further, lateral screws 36 for fixing the bottom plate 35 are inserted from the side surface of the grip base 16 at intervals of 120 ° in the circumferential direction to prevent the bottom plate 35 from spinning around the grip base 16.
According to such a configuration, when the grip angle adjusting device 30 is attached to the housing 10a, the grip base 16 is rotated around the axis, or the nut 34 is rotated by applying a tool (such as a spanner), The bolt 33 can be fastened and fixed to the grip mounting screw hole 10g. Accordingly, the housing 10a and the grip angle adjusting device 30 can be easily attached and detached, and can be replaced with a grip angle adjusting device having a different shape depending on the application. Further, if the grip is attached to a screw hole having the same diameter as the grip attachment screw hole 10g, the existing grip can be easily removed and replaced with the present apparatus.
[0019]
Next, a third embodiment of the present invention is shown in FIGS.
The grip angle adjusting device 40 according to the third embodiment is obtained by knurling the contact surfaces of the support plate 46c, the external dish plate 47, and the dish-shaped nut 48.
As shown in FIG. 7, the curved surfaces of the support plate 46c, the external countersink 47, and the countersunk nut 48 are knurled, and these processed surfaces are pressed against each other. As shown in FIG. 8, the processed surface R is formed in a direction in which a plurality of fine concavo-convex ridges intersect substantially vertically at a predetermined interval, and the friction coefficient is remarkably increased.
Since the other components are substantially the same as those of the second embodiment, the same components are denoted by the same reference numerals and the description thereof is omitted.
[0020]
According to the third embodiment, at the time of tightening, the processing surface R of the outer countersink 47 and the countersunk nut 48 is tightened to the support plate 46c with a relatively large pressing force. Is difficult to loosen, and the setting position of the grip shaft is hardly displaced. Therefore, the reliability during work is further improved.
[0021]
In addition, although the said 1st Example-3rd Example was demonstrated as an Example of this invention, as another modification, the shape of a grip base is not restricted to a cylindrical shape, It is also possible to make it a rectangular tube shape. Is possible. Further, the present invention can be applied not only to the sub grip but also to the main grip. In addition, a grip angle adjustment device integrated with the body of the tool can be provided on both sides, allowing the operator to freely select the right and left by the dominant hand, making it possible to easily realize the ideal working posture for the tool handler. It is.
Furthermore, the processing method of the contact surfaces of the anti-slip support plate and the dish plate is not limited to knurling, and may be provided with irregularities by forming line marks or protrusions on the plate surface by pressing or the like. Good. The formation position of the concavo-convex portion may be on radiation, on a concentric circle, or the like.
[0022]
【The invention's effect】
As described above, according to the grip angle adjusting device of the present invention, the grip angle can be arbitrarily changed with the enlarged hole of the grip base by attaching the outer counter plate and the fixing nut to the grip adjusting bolt. Therefore, it is possible to freely select the gripping degree according to the preference of the operator, and the operability of a tool such as a polisher can be greatly improved. Therefore, the working posture can be made less fatigued, and the working efficiency can be improved.
In addition, according to the present invention, since the grip angle can be reliably fixed at a predetermined angle, there is an effect that the work can be performed with peace of mind without shifting the grip angle during the work.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a polisher according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a sub grip of a polisher according to a first embodiment of the present invention.
FIG. 3 is a longitudinal sectional view showing a state in which the angle of the sub grip shown in FIG. 2 is changed.
4 is a cross-sectional view taken along line IV-IV shown in FIG.
FIG. 5 is a longitudinal sectional view showing a sub-grip of a polisher according to a second embodiment of the present invention.
6 is a longitudinal sectional view showing a state in which the angle of the sub grip shown in FIG. 5 is changed.
FIG. 7 is a longitudinal sectional view showing a grip of a polisher according to a third embodiment of the present invention.
FIG. 8 is a plan view showing a grip base according to a third embodiment of the present invention.
FIG. 9 is a perspective view showing a polisher according to a conventional example.
[Explanation of symbols]
10 Polisher 10a Housing (Body)
15 grip angle adjusting device 16 grip base 16a bottom plate 16b cylindrical body 16c support plate 17 outer plate 18 inner plate 19 grip angle fixing bolt 19a annular projection 20 grip body 21 fixing nut 31 plate nut (fixing nut)
H Enlarged hole R Processed surface (Uneven surface)

Claims (2)

A grip body is provided via a grip base at a predetermined position of the tool housing,
The grip base has a side surface surrounded by a cylindrical tube, one end of the tube is a support plate, and the other end is a bottom plate.
And the bottom plate is fixed to a predetermined position of the housing of the tool, and the grip angle adjusting device in which the grip body is connected to the support plate,
The support plate is formed with a dome-shaped curved surface, and an enlarged hole is formed at the center of the support plate,
And an external dish plate is provided so as to circumscribe the support plate,
And a grip angle fixing bolt is fixed to the grip base side in the axial direction of the grip body,
And a nut is stored inside the grip base,
The grip angle fixing bolt is inserted into the enlarged hole of the support plate through the external dish plate, and is screwed into the nut.
The grip angle adjusting device, wherein the external dish plate is provided so as to be slidable with respect to the curved surface of the support plate.   The grip angle adjusting device according to claim 1, wherein an uneven portion is formed on a contact surface between the support plate and the external dish plate.

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