JPH091478A - Grip angle regulating device - Google Patents

Abstract

PURPOSE: To freely change a grip angle of a tool and the like in a wide angle range so as to accomplish prevention of disturbance due to a grip in a narrow space, easy achievement of an ideal working posture for a worker handling the tool, and improvement in work efficiency. CONSTITUTION: A grip angle regulating device 15 is provided with a grip base 16, an outside tray plate 17, an inside tray plate, a grip angle fixing bolt 19, a grip main body 20, and a fixing nut 21. The grip base 16 is constructed of a bottomed cylindrical body 16a and an L-shaped supporting member 16b, and in the circumference direction of the cylindrical body 16a, an expanded long hole H is arranged. A bolt 23 penetrates a tongue plate face of the supporting member 16b so as to be fastened and fixed in a mounting screw hole in a housing for a grinder and the like. In adjustment of a grip angle, fastening between the outside tray plate 17 and the fixing nut 21 is loosened when the grip main body 20 and the grip angle fixing bolt 19 are integrally rotated around a spindle, so that the outside tray plate 17 and the fixing nut 21 can be slid on an outer circumferential face and on an inner circumferential face of the cylindrical body 16a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grip angle adjusting device and is applied to grips of tools such as grinders, polishers, sanders, drills, chainsaws and handy cutters.

[0002]

2. Description of the Related Art Conventionally, a grinder has been known as a tool used for metal grinding, deburring, rust removal and the like. For example, as shown in FIG. 9, a grinder 1 has an electric motor for driving built in a housing 1a having a grip 1c, and a disc-shaped grindstone 2 is attached to a tip of an output shaft 1f of the electric motor. Then, when actually performing surface grinding of a metal plate or the like, while applying grinding oil or the like to the processed surface and holding the housing 1a and the grip 1c to continuously rotate the grindstone 2 in either one of forward and reverse directions. ,
The grindstone 2 is pressed against the grinding surface to perform the grinding work.

[0003]

However, according to such a conventional grinder, since the mounting angle of the grip 1c is fixed so as to be substantially perpendicular to the housing 1a, an operator is required to perform work such as grinding. Due to individual differences such as arm length and hand size, each grip is difficult to grip,
In some cases, unnecessary power is applied and tired easily. Also,
When the working space on the processing surface is small, the grip may interfere with the work. In particular, since the grinder is used for various purposes such as plate processing and pipe processing, it is necessary to hold the grindstone surface at various angles, and it is desirable to change and set the grip angle in a wide angle range. On the other hand, a grip is fixed to a ring member slidably provided on the outer peripheral surface of the housing so that the grip position can be changed within a range of 360 ° around the axis. Since the grip rotates while the angle is maintained at about 90 °, in a narrow space such as pipe processing, the grip eventually becomes an obstacle, making it difficult to perform work.

The present invention has been made in view of such a situation as described above, and it is possible to freely change the grip angle of tools in a wide angle range, and the grip hardly interferes with the work even in a narrow space, so that the tool It aims to improve work efficiency by making it possible to easily realize the ideal work posture of the operator.

[0005]

Therefore, the grip angle adjusting device of the present invention comprises a support member fixed to a predetermined position of the housing of the tool and a cylindrical body fixed to the support member. A grip base having an enlarged elongated hole in the circumferential direction on its cylindrical surface, an external dish plate slidably provided on the outer peripheral surface of the cylindrical body, and a penetrating through the external dish plate and inserted into the enlarged elongated hole. A grip angle fixing bolt, and a grip body integrally fixed to the grip angle fixing bolt,
And a fixing nut that is slidably provided on the inner peripheral surface of the cylindrical body, is fitted to the grip angle fixing bolt, and is fastened to the inner peripheral surface of the cylindrical body. Further, the grip angle adjusting device of the present invention is characterized in that the fixing nut has a cylindrical shape. Further, a concavo-convex portion is formed on a contact surface between the cylindrical body and the outer dish plate.

[0006]

According to the grip angle adjusting device of the present invention, by loosening the tightening force of the grip angle fixing bolt and the fixing nut, the outer dish plate and the fixing nut can slide on the cylindrical body of the grip base, and the grip body The grip angle of is adjusted. That is, when changing the grip angle, when the grip body and the grip angle fixing bolt are integrally rotated in the loosening direction, the fixing nut is loosened and the external dish plate and the cylindrical body are fastened. At this time, if the outer tray plate is slid along the outer peripheral surface of the cylindrical body, the grip angle fixing bolt moves so as to have a predetermined angle within the range of the enlarged slot, and the grip angle of the grip body is changed. It After the grip angle is determined, when the grip body and the grip angle fixing bolt are rotated in the tightening direction, the outer plate and the fixing nut are tightened to the cylindrical body, and the grip body is fixed at a constant angle.

When the fixed nut is formed in a cylindrical shape, the fixed nut slides smoothly on the inner peripheral surface of the cylindrical body,
Moreover, it becomes possible to firmly and securely tighten the grip angle fixing bolt and the fixing nut. Further, when the uneven surface is formed on the contact surface between the cylindrical body and the external dish plate, the friction coefficient of each contact surface increases, so that the tightening force of the grip angle fixing bolt increases and the grip body further has a stable feeling. improves.

[0008]

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 grip of a grinder. As shown in FIG. 1, the grinder 1
0 is a drive motor 10b in an insulating housing 10a
And a grip 10c on the side surface of the housing 10a. The power cord 12 is taken out from the rear end of the housing 10a, and the switch 10d is provided on the same surface. An output shaft 10f of the drive motor 10b is projected in front of the housing 10a.
A disk-shaped grindstone 14 is detachably attached to the tip of the.

As shown in FIG. 2, the grip angle adjusting device 15 includes a grip base 16, an outer plate 17, a grip angle fixing bolt 19, a grip body 20, and a fixing nut 2.
1 is provided. The grip base 16 is fastened and fixed to a predetermined position of the housing 10a. A grip angle fixing bolt 19 extending in the axial direction of the grip body 20 is attached to an upper portion of the grip base 16 by an outer plate 17 and a fixing nut 21 while keeping a predetermined angle.
Grip base 16, external plate 17 and fixing nut 21
As for the material of, for example, iron, aluminum, ceramics, plastics and the like are used.

The grip base 16 comprises a cylindrical body 16a having a bottomed cylindrical shape and an L-shaped support member 16b. The support member 16b is fixed to the end surface of the cylindrical body 16a by welding or the like. An enlarged elongated hole H is provided in the circumferential direction of the cylindrical body 16a. A bolt 23 is passed through a tongue plate surface of the support member 16b through a washer 24 so that the housing 10a
It is tightened and fixed in the mounting screw hole of.

Regarding the formation position of the enlarged elongated hole H, it is formed in a semi-circular shape in the upper part of the peripheral surface of the cylindrical body 16a within a range of approximately 180 °. As a result, as will be described later, the grip angle can be freely set within a wide range from an angle parallel to the side surface of the housing 10a to a vertical angle with the fixed nut 21 as a fulcrum. Regarding the mounting position of the support member 16a to the housing 10a, the cylindrical body 16a
The enlarged elongated hole H can be tilted and fixed at a desired angle with respect to the axial direction of the housing 10a. It is desirable to set in advance before using the grinder according to the shape of the processed product and the working space. In addition, in the structure shown in FIG. 1, the support member 16b is fixed to the side surface of the housing 10a in a direction in which the enlarged elongated hole H is substantially orthogonal to the axial direction of the housing 10a.

As shown in FIG. 3, a cylindrical fixed nut 21 slidable on the inner peripheral surface is inserted inside the cylindrical body 16a of the grip base 16. In the radial direction of the fixing nut 21, a nut slot N that can fit into the grip angle fixing bolt 19 is formed with a predetermined depth. Fixing nut 21
Can be easily inserted from the cylindrical opening of the cylindrical body 16a.

The outer tray plate 17 is a disc-shaped member having an arcuate cross section, and a grip angle fixing bolt 19 is inserted into a through hole in the center thereof. The plate surface of the external plate 17 is curved along the outer peripheral surface of the cylindrical body 16a, and when the grip angle fixing bolt 19 is tilted, the plate surface of the external plate 17 follows this.
Move along the outer peripheral surface of the cylindrical body 16a.

The grip body 20 is provided with a grip angle fixing bolt 19 in a direction coinciding with the central axis thereof.
By rotating the grip body 20 around the axis, the grip angle fixing bolt 19 can be rotated. The grip surface of the grip body 20 is covered with a non-slip protective material such as rubber or resin so that the operator can easily grip the grip.

When using the grinder 10, first, the power cord 12 connected to the drive motor 10b is connected to a commercial power source, and the grindstone 14 is attached to the output shaft 10f of the housing 10a. Next, when the switch 10d of the drive motor 10b is turned on, the output shaft 10f of the drive motor 10b rotates, and the grindstone 14 also rotates accordingly. The operator uses the housing 10a and the grip 1
With 0c, the grindstone surface is brought into contact with the workpiece, the grindstone 14 is moved in a predetermined direction, and an operation such as grinding is performed. The grindstone 14 can be replaced with diamond or the like as necessary.

Here, when the operator changes the grip angle of the grip 10c, the grip angle adjusting device 15 is operated as follows. First, when the grip body 20 is rotated counterclockwise around the axis, the fixing nut 21 is loosened from the grip angle fixing bolt 19, and the clamping force between the outer dish plate 17 and the fixing nut 21 is reduced. Then, the external plate 17
When the tightening force of the fixing nut 21 is appropriately loosened, the grip body 20 is tilted along the enlarged elongated hole H at a predetermined angle to adjust the grip shaft to a desired angle. At this time, as shown in FIG. 4, the outer dish plate 17 and the fixing nut 21 are slid on the outer peripheral surface and the inner peripheral surface of the cylindrical body 16a in accordance with the movement of the grip angle fixing bolt 19 within a range of about 180 °. To move. After the grip angle is determined, when the grip body 20 is rotated clockwise, the grip angle fixing bolt 19 fits in the tightening direction of the fixing nut 21. As a result, the fixing nut 21 is tightened to the cylindrical body 16a side, and the grip shaft is fixed at a fixed position.

As described above, according to the grip angle adjusting device 15 of the embodiment, the grip angle can be easily adjusted by rotating the grip body 20. Therefore, it is possible to easily realize a work posture suitable for the body shape of the user. For example, if you have a long reach,
As shown by an arrow A in FIG. 1, when the grip 10c is tilted to the lower side of the housing 10a, it becomes easier to operate the grinder 10. Further, as shown by an arrow B in FIG. 1, if the housing 10a is tilted upward, the load on the arm when operating the grinder can be reduced due to the moment acting on the grip.

Next, a second embodiment of the present invention is shown in FIGS. Grip angle adjusting device 30 according to the second embodiment
Shows that the housing 10a and the grip base 36 are fixed by the stud bolts 32. In the grip base 36, the cylindrical body 36a and the support member 36b are joined in the axial direction. A cylindrical fixed nut 31 is slidably housed in a space formed between the cylindrical body 36a and the support member 36b. The stud bolt 32 is fitted in the axial direction of the supporting member 36b, and the lateral screw 33 is used to support the supporting member 36b.
It is prevented from coming off. A nut 34 for tightening is fitted to the stud bolt 33.

When the support member 36b is fixed to the housing 10a, the stud bolt 33 is fitted in the mounting screw hole 10h to set the enlarged elongated hole H of the cylindrical body 36a in a predetermined direction. Next, the nut 34 is tightened to the housing 10a side while holding the grip base 36 so as not to rotate. As a result, the grip base 36 is fixed to the side surface of the housing 10a in a desired direction. According to the configuration of the second embodiment, by loosening the nut 34 with a tool such as a spanner,
The direction of the grip base 36 can be easily changed. Further, the housing 10a and the grip angle adjusting device 3
It can be easily attached to and detached from 0, and can be easily replaced with a grip angle adjusting device having a different size, shape, or the like. Further, the housing 10
If the tool has a grip attached to a screw hole having the same diameter as the attachment screw hole 10h of a, it is possible to remove the existing grip and replace it with the present device.

Regarding the shape of the outer plate 37 of the second embodiment, the plate surface is rectangular and is formed with a predetermined plate thickness. A flat surface 37a is formed on the upper surface of the outer plate 37 in FIG. 6, and a cylindrical surface 37b is formed on the lower surface thereof. When the grip angle fixing bolt 19 is moved along the enlarged elongated hole H, the cylindrical surface 37b slides on the peripheral surface of the cylindrical body 36a. According to such an outer plate 37, when the grip body 20 is tightened, the flat plate 37a
Since the tightening force of the grip body 20 acts evenly on the cylindrical surface 37b, the grip fixing bolt 19 is hard to loosen,
The fixed angle of the grip will become more stable.

Next, a third embodiment of the present invention is shown in FIGS. Grip angle adjusting device 40 according to the third embodiment
Is obtained by knurling the respective contact surfaces of the grip base 46 and the outer plate 47. As shown in FIG.
The cylindrical surface of the cylindrical body 46a and the inner curved surface of the outer dish plate 47 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 ridges and valleys intersect at a predetermined interval in a substantially vertical direction, and the coefficient of friction is significantly increased. The other components are substantially the same as those in the first embodiment.

According to the third embodiment, since the machined surface of the outer dish plate 47 is tightened to the cylindrical body 46a with a relatively large pressing force during tightening, the grip adjusting bolt 19 is unlikely to loosen due to vibration during working. , The setting position of the grip axis rarely shifts. Therefore, the reliability during work is further improved.

Although the first to third embodiments have been described as the embodiments of the present invention, as another modification, the grip angle adjusting device is not limited to the grinder and is applied to the polisher, the sander, or the like. It is also possible to do so. Further, the present invention is not limited to the electric type and the present invention can be applied to an air driven type tool. Further, the cylindrical body may be integrally formed in the housing of the tool, or mounting screw holes may be provided on both sides of the housing so that the grip angle adjusting device can be mounted on either the left side or the right side. Further, the method for processing the contact surface of the non-slip cylinder and the dish plate is not limited to knurling, but it is also possible to form line marks or protrusions on the plate surface by press processing or the like to provide the uneven portion. Good. In addition, the fixing nut is not limited to a cylindrical shape, but may be a cylindrical shape, an arch shape or the like as long as it has a cylindrical surface.

[0024]

As described above, according to the grip angle adjusting device of the present invention, by tightening the outer dish plate and the fixing nut to the grip angle fixing bolt, the grip angle within the range of the elongated slot of the grip base. Since it can be changed arbitrarily, the degree of grip of the grip can be freely selected according to the preference of the operator, and the operability of tools can be greatly improved. Therefore, there is an effect that it is possible to make the work posture less tired and improve work efficiency. According to the present invention,
Since the grip angle can be adjusted in a relatively wide range of angles, the grip is less likely to be an obstacle during work, and tools such as a grinder can be used safely and easily for many purposes.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a grinder according to a first embodiment of the present invention.

2A and 2B show a grip angle adjusting device according to a first embodiment of the present invention, FIG. 2A being a front view and FIG. 2B being a side view.

FIG. 3 is a sectional view showing a grip angle adjusting device according to a first embodiment of the present invention.

FIG. 4 is a sectional view illustrating a method of using the grip angle adjusting device according to the first embodiment of the present invention.

FIG. 5 is a side view showing a grip angle adjusting device according to a second embodiment of the present invention.

FIG. 6 is a sectional view showing a grip angle adjusting device according to a second embodiment of the present invention.

FIG. 7 is a sectional view showing a grip angle adjusting device 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 grinder according to a conventional example.

[Explanation of symbols]

 10 Grinder 10a Housing 15 Grip angle adjusting device 16 Grip base 16a Cylinder 16b Supporting member 17 External dish plate 19 Grip angle fixing bolt 20 Grip body 21 Fixing nut H Enlarged long hole N Nut Groove R Machining surface (uneven part)

Claims (3)

[Claims] 1. A grip base comprising a support member fixed to a predetermined position of a housing of a tool and a cylindrical body fixed to the support member, and having a circumferentially enlarged elongated hole on a cylindrical surface of the cylindrical body. An outer dish plate slidably provided on the outer peripheral surface of the cylindrical body, a grip angle fixing bolt that penetrates the outer dish plate and is inserted into the enlarged elongated hole, and integrally with the grip angle fixing bolt. A grip body that is fixed; and a fixing nut that is slidably provided on the inner peripheral surface of the cylindrical body and that is fitted to the grip angle fixing bolt and that is tightened to the inner peripheral surface of the cylindrical body. Characteristic grip angle adjustment device. 2. The grip angle adjusting device according to claim 1, wherein the fixing nut has a cylindrical shape. 3. The grip angle adjusting device according to claim 1, wherein a concavo-convex portion is formed on a contact surface between the cylindrical body and the outer dish plate.