JP2007015088A - Electric rotating tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric rotating tool capable of precisely fastening or loosening a bolt without a checking action in a bolt rotary direction regardless of a position of the bolt. <P>SOLUTION: A switch 11 for actuating an electric motor 3 is arranged outside a main body 1, and is a 3-pole toggle switch having a lever 111. When the lever 111 of the switch 11 is fallen down in a forward direction, a bolt Bt moves forward and is fastened. When the lever 111 of the switch 11 is fallen down in a backward direction, the bolt Bt moves backward, and is loosened. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an electric rotary tool used for tightening / loosening screws, drilling holes in an article, threading, and the like.

2. Description of the Related Art Conventionally, an electric rotary tool (electric driver) is used for screwing a screw when assembling an article to improve work efficiency. The electric driver rotates the driver bit using the driving force of the electric motor, thereby rotating the head of the bolt engaged with the tip of the driver bit to rotate the bolt.

FIG. 5 shows a side view of an electric driver as an example of a conventional electric rotary tool. The electric driver B shown in FIG. 5 has a main body 91, an electric motor 92 disposed inside the main body 91, and a rotating portion 93 connected to the output shaft 921 of the electric motor 92. A power source (here, a storage battery 94) for supplying electric power for driving the electric motor 92 is disposed in the main body 91 of the electric driver B shown in FIG. The drive motor 92 can change the rotation direction by switching the direction in which the current flows.

A driver bit 931 for engaging with the head of the bolt is attached to the tip of the rotating portion 93. The driver bit 931 is detachable and can be replaced in accordance with the shape and size of the bolt (the shape and size of the driver engaging portion of the bolt head).

A switch 910 for switching the operation of the electric driver B is attached to the outer peripheral portion of the main body 91 of the electric driver B. The switch 910 includes a first push portion 911 and a second push portion 91.
2. As shown in FIG. 5, the switch 910 is arranged so that the first pressing portion 911 and the second pressing portion 912 are arranged in the circumferential direction of the outer peripheral portion of the electric driver B. The switch 910 is a normally open contact switch. While the first pressing portion 911 is pressed, the rotating portion 93 rotates in the direction of the first pressing portion 911, and when released, the switch 910 returns and stops. The same applies to the second pusher 912.
It rotates in the direction opposite to when the first pressing portion 911 is pressed.

A bolt Bt that is normally used for fastening an article or fixing it in combination is formed with a right-handed male thread. When tightening the bolt Bt, when the bolt Bt is viewed from the electric driver B, the rotating portion 93 is rotated in the clockwise direction, and the bolt Bt is rotated by the driver bit 931. In other words, the bolt Bt can be tightened by engaging the tip of the driver bit 931 with the head of the bolt Bt and pushing the first push portion 911 of the switch 910.

Conversely, to loosen the bolt Bt, the second push part 912 of the switch 910 is pushed, and when the bolt Bt is viewed from the electric driver B, the rotating part 93 is rotated in the clockwise direction, and the bolt Bt is rotated by the driver bit 931. Let loosen.
JP 2003-51181 A

For example, when assembling a product in a factory assembly line or the like, parts are placed on the flowing product and bolted or removed. At this time, if the bolting position is the front and top surface of the product when viewed from the assembly operator, the operator can quickly recognize the rotation direction of the bolt (for tightening or removal) and use the electric driver B accurately. can do. At this time, electric driver B
The rotating direction of the rotating portion 93 corresponds to the direction of the first pressing portion 911 or the second pressing portion 912 of the switch 910, and the bolt can be rotated in the correct rotating direction without being rotated once.

However, when the position of the bolt on the product is the back surface, the side surface, the bottom surface and the diagonal direction, it is often difficult to instantly recognize the bolt rotation direction for tightening or loosening the bolt (right screw), It is easy to mistake the direction of rotation for tightening or loosening the bolt. In particular, when working with both the dominant hand and the non-dominant hand, it is easy to mistake the rotation direction of the bolt. If the rotation direction of the bolt is wrong, for example, if the tightened bolt is further rotated in the tightening direction, the bolt head is licked or the screw groove is crushed.

Confirmation for tightening or loosening the bolt is necessary to prevent the occurrence of such defects. For this confirmation, it is necessary to waste the time to drive the electric driver B and confirm the rotation direction of the driver bit 931.

Further, since the rotation is performed for checking the rotation direction, unnecessary power is consumed accordingly. In addition, in the case where the electric driver B is driven by a storage battery, wasteful power is consumed each time confirmation is performed.
The number of bolts that can be tightened or loosened with a single charge is reduced, and so is inefficiency.

Accordingly, an object of the present invention is to provide an electric rotary tool capable of accurately tightening or loosening a bolt without performing a confirmation operation in the bolt rotation direction regardless of the position of the bolt.

In order to achieve the above object, the present invention is detachably coupled to a main body part, an electric motor disposed inside the main body part, a rotating part connected to a drive shaft of the electric motor, and the rotating part. An electric rotary tool having a driver bit capable of tightening or loosening a bolt and a drive switch attached to an outer peripheral surface of the main body to drive the electric motor to rotate the rotary tool. The drive switch is a three-contact type A toggle position for stopping the drive motor, a first drive position for driving the motor to rotate the driver bit in a direction in which the right screw is tightened, and a direction in which the right screw is loosened in the driver bit. A second drive position for driving the motor to rotate, and the drive switch is a first drive centered on the neutral position. When the switch is not used, the switch is biased to return to the neutral position when the position and the second drive position are opposed to each other, and the first drive position is An electric rotary tool is provided, which is located on the driver bit side with respect to the neutral position, and the second drive position is located on the opposite side.

The electric rotary tool can be operated in accordance with the tightening / loosening of the bolt without operating the electric rotary tool when closing the bolt and checking the rotation direction. Further, the bolt can be quickly tightened / loosened regardless of the bolt mounting position.

In order to achieve the above object, the present invention is detachably coupled to a main body part, an electric motor disposed inside the main body part, a rotating part connected to a drive shaft of the electric motor, and the rotating part. An electric rotary tool comprising: a rotary tool capable of tightening or loosening a bolt; and a drive switch attached to the outer peripheral surface of the main body to drive the electric motor to rotate the rotary tool. A neutral position where the drive motor is stopped, a first drive position where the motor is driven to rotate the rotating tool in a direction in which the right screw is tightened, and a rotating tool is rotated in a direction in which the right screw is loosened. Second to drive the motor
The drive switch is arranged linearly along the axis of the main body so that the first drive position and the second drive position are opposed to each other with the neutral position as a center, and the switch When not used, it is biased to return to the neutral position, the first drive position is located on the rotary tool side with respect to the neutral position, and the second drive position is located on the opposite side. An electric rotary tool is provided.

In the electric rotary tool having the above configuration, the switch may be a toggle switch or a slide switch. The switch is a direction in which the user advances the rotary tool, in other words, a bolt formed with a so-called right-hand thread, without seeing the switch in the direction in which the drill advances,
A switch that can be input intuitively can be widely used. In particular, a toggle switch with a protruding lever is desirable because the user can easily recognize the position of the switch.

According to the present invention, it is possible to provide an electric rotary tool capable of accurately tightening or loosening a bolt without performing a confirmation operation in the bolt rotation direction regardless of the position of the bolt.

Even if the bolt is placed in a special position (when the user cannot see the bolt directly or when it must be operated with a non-listening hand), be aware of the direction of rotation for tightening / loosing the bolt. Even without it, the driver bit can be rotated in the correct direction, and human error can be reduced.

In addition, it is not necessary to check the direction of rotation by rotating the electric rotary tool before tightening / loosening the bolt, the power consumption can be reduced, and energy saving can be achieved.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a side view of an electric driver which is one of electric rotating tools according to the present invention. An electric driver A shown in FIG.
And a rotating part 2. An electric motor 3 and a power supply 4 for supplying driving electric power to the electric motor 3 are provided in the main body 1. Here, the power source 4 is a rechargeable battery. The main body 1 has a cylindrical shape, although not limited thereto. The central axis of the rotating unit 2 is disposed so as to overlap with the central axis of the main body unit 1.

A switch 11 for operating the electric motor 3 is disposed outside the main body 1.
The electric motor 3 has a drive shaft 31, and the drive shaft 3 is supplied by supplying electric power to the electric motor 3.
1 rotates. At this time, the drive shaft 3 is changed by changing the electric power supplied to the electric motor 3.
The rotational torque generated from 1 can be changed, and the rotational direction can also be changed.

The rotating part 2 includes a rotating shaft 21 that is rotatably supported by the main body 1 and a chuck mechanism (not shown) for attaching a rotating tool (here, a driver bit 22). A rotating shaft 21 of the rotating unit 2 is connected to a driving shaft 31 of the electric motor 3. In the electric driver A shown in FIG. 1, the drive shaft 31 of the electric motor 3 and the rotary shaft 21 of the rotating unit 2 are directly connected. However, the present invention is not limited to this, and torque that prevents a certain amount of torque from being transmitted. It may be connected via a limiter or a speed reduction mechanism having, for example, a planetary gear mechanism.

The switch 11 is a three-pole toggle switch provided with a lever 111 and is arranged in the center and can be tilted in the opposite direction across the center. As shown in FIG. 1, the switch 11 is arranged so that the tilting direction of the lever 111 is along the central axis of the main body C. Lever 111
Is always energized so as to return to the center. When the lever 111 is arranged at the center, the electric motor 3 is not energized (the switch is turned off).

Bolts used to tighten articles and components are not used for special purposes,
A right-hand thread is formed. The right screw moves forward by rotating clockwise (clockwise) as viewed in the axial direction, and moves backward by rotating counterclockwise (counterclockwise). 2A to 2C are shown in FIG.
The rotation direction in each switch input state of the electric driver shown in FIG. Here, it is assumed that a driver bit 22 is attached to the lower side of the electric driver A in FIGS. Here, the forward direction of the bolt Bt is the opposite side to the head of the bolt Bt, and the reverse direction is the side where the head of the bolt Bt is provided. Hereinafter, the forward direction and the backward direction are indicated similarly.

The electric driver A shown in FIG. 2A is in a state in which the lever 111 of the switch 11 has fallen to the lower side F. At this time, the rotating part 2 of the electric driver A rotates clockwise toward the paper surface as indicated by an arrow Ar1 in the drawing. That is, the electric driver A abuts the driver bit 22 on the head of the bolt Bt, tilts the lever 111 toward the bolt Bt, rotates the bolt Bt in the clockwise direction, and the bolt Bt advances while rotating. In other words, the bolt Bt engaged with the driver bit 22 moves forward in the tilting direction (F direction) of the lever 111, whereby the bolt Bt is tightened.

Further, the electric driver A shown in FIG. 2B is in a state in which the lever 111 of the switch 11 is tilted to the upper side R. At this time, the rotating part 2 of the electric driver A rotates counterclockwise toward the paper surface as indicated by an arrow Ar2 in the drawing. That is, the electric driver A has a driver bit 2
2 is brought into contact with the head of the bolt Bt, and the lever 111 is tilted to the opposite side of the bolt Bt, whereby the bolt Bt is rotated in the counterclockwise direction, and the bolt Bt is rotated backward. That is, the bolt Bt engaged with the driver bit 22 moves backward in the tilting direction (R direction) of the lever 111, whereby the bolt Bt is loosened.

Further, in the electric driver A shown in FIG. 2C, the lever 111 of the switch 11 is located at the center C. At this time, the rotating part 2 of the electric driver A is stopped. That is, when the electric driver A is not used, the lever 111 of the switch 11 is stopped at the center C.

As described above, when the electric driver A abuts the driver bit 22 on the bolt head and tilts the lever 111 of the switch 11 to the side where the driver bit 22 is attached (the direction in which the bolt Bt moves forward), the driver bit 22 is turned to the bolt Bt. And the bolt Bt is advanced and tightened in the screwing direction, that is, the direction in which the lever 111 is tilted. When the lever 111 is tilted in the direction opposite to the side where the driver bit 22 is attached (the direction in which the bolt Bt moves backward), the bolt Bt is rotated counterclockwise, and the bolt Bt is pulled out, that is, the lever is tilted. Go backwards in the direction.

As described above, in the electric driver A, the tilting direction of the lever 111 of the switch 11 and the traveling direction of the bolt Bt on which the right screw is formed coincide with each other, so that the bolt mounting position is at a position where it is difficult for the operator to recognize the rotation direction. There is no need to worry about the direction of tightening or loosening bolts, even if you frequently change the hand between the dominant hand and the non-dominant hand. it can.

As shown in FIG. 3, the electric screwdriver A <b> 2 has a drill bit 2 instead of the driver bit 22.
3 may be attached. By attaching the drill bit 23, it can be used as a drill for drilling. In many cases, the drill bit 23 is rotated clockwise when a hole is formed, and after the hole has been formed, the drill bit 23 is pulled out while being rotated in the reverse direction. Switch 1 as shown in FIG.
By forming 1, it is possible to easily make a hole regardless of the drilling location.

FIG. 4 shows a side view of another example of the electric rotary tool according to the present invention. As shown in FIG. 3, the switch 12 of the electric driver A3 may be a slide switch. As in the switch 12 of the electric driver A3 shown in FIG. 1, the switch 12 is at the neutral position where the center is stopped, and the force is urged so as to always return to the neutral position. Thus, by using a slide switch as the switch 12, when the electric driver B is arranged on a plane, the protrusion is small, so that it is difficult to break.

In each of the above-described embodiments, a toggle switch and a slide switch are described as an example of the switch. However, the present invention is not limited thereto, and the bolt Bt is tightened / loosened without the user turning and visually checking the rotary tool. It is possible to widely adopt a switch that can perform the above.

The present invention can be applied to an electric rotary tool in which the tip is rotated forward and reverse by a motor such as an electric driver and an electric drill.

It is a side view of an example of the electric rotary tool concerning the present invention. FIGS. 4A to 4C are side sectional views of the optical disc apparatus shown in FIG. 1 showing the turning direction of the turning portion and the turning tool in the switch input state of the electric driver shown in FIG. It is a side view of the other example of the electric rotary tool concerning this invention. It is a side view of the other example of the electric rotary tool concerning this invention. It is a side view of the electric driver which is an example of the conventional electric rotary tool.

Explanation of symbols

A, A2, A3, B Electric screwdriver 1 Body 11 Switch 111 Lever 2 Rotating part 21 Rotating shaft 22 Driver bit 3 Electric motor 3 Driving shaft

Claims (4)

A main body, an electric motor disposed inside the main body, a rotating portion connected to a drive shaft of the electric motor, and a driver bit that is detachably coupled to the rotating portion and can tighten or loosen a bolt. In the electric rotary tool having a drive switch attached to the outer peripheral surface of the main body and driving the electric motor to rotate the rotary tool,
The drive switch is a three-contact type toggle switch, a neutral position for stopping the drive motor, a first drive position for driving the motor to rotate the driver bit in a direction in which a right screw is tightened, and the driver bit And a second drive position for driving the motor to rotate the right screw in a loosening direction,
The drive switch is arranged linearly along the axis of the main body so that the first drive position and the second drive position face each other with the neutral position as the center, and the switch returns to the neutral position when not in use. Energized,
The first drive position is located on the driver bit side with respect to the neutral position,
An electric rotary tool characterized in that the second drive position is located on the opposite side. A main body, an electric motor disposed inside the main body, a rotating portion connected to a drive shaft of the electric motor, and a rotary tool that is detachably coupled to the rotating portion and can tighten or loosen a bolt. In the electric rotary tool having a drive switch attached to the outer peripheral surface of the main body and driving the electric motor to rotate the rotary tool,
The drive switch is a three-contact type, and a neutral position for stopping the drive motor;
A first driving position for driving the motor to rotate the rotating tool in a direction in which the right screw is tightened; and a second driving position for driving the motor to rotate the rotating tool in a direction in which the right screw is loosened. And
The drive switch is arranged linearly along the axis of the main body so that the first drive position and the second drive position face each other with the neutral position as the center, and the switch returns to the neutral position when not in use. Energized,
The electric rotary tool characterized in that the first drive position is located on the rotary tool side with respect to the neutral position, and the second drive position is located on the opposite side. The electric rotary tool according to claim 2, wherein the switch is a toggle switch. The electric rotary tool according to claim 2, wherein the switch is a slide switch.

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