JPS5889082A - Motor device - Google Patents

Abstract

PURPOSE:To improve the operability and the safety of a motor device by providing two switches which respectively act as changeover switch for rotating a motor in normal and reverse directions and as opening and closing switches for opening and closing a power source. CONSTITUTION:When a motor 22 rotates normally, the ON pushbutton 29 of a switch 25 and an OFF pushbutton 30 of a switch 26 are operated, thereby forming a circuit of a COM-A (contacts 31, 32 are closed) and COM-D (contacts 31, 35 are closed). When the motor is stopped, the pushbutton 30 of the switch 25, thereby forming a circuit of COM-B, COM-D. When the motor rotates reversely, the switch 25 remains so that the motor 22 is stopped, and the pushbutton 29 or 30 of the switch 26 is operated. In order to prevent the erroneous operation of the switches 25, 26, a switch cover 39 having pushbutton operating zone 38 is provided. The switch 35 or 26 is disposed in response to the normal or reverse rotation of the motor 22 in the pushbutton operating zone 38.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric device, and more particularly, the present invention is composed of a plurality of processing tools and a plurality of switches for opening/closing a power supply and switching circuits paired with each of the processing tools. The present invention relates to an improvement in an electric device having a configuration in which a switch and a switch rotate around the same center point.

There is a router machine as a type of electric equipment, and the related art will be explained with reference to FIGS. 1 to 3. FIG. 1 is a front view, and in FIG. 1, the motor 4 of the router machine 3, which has machining tools such as a Muruta bit 1 and a B router bit 2 at both ends, is operated according to the use of the router bit 1 and the B router bit 2. It is a series commutator motor with an electric circuit that allows forward and reverse rotation. In addition, the motor 4Fi router machine 3 is rotatably connected to a shirt 6 provided on the frame 5 of the router machine 3, and rotates around the shaft 6.
When using router bit 1, router bit 2 is located at the top of router machine 3, as shown in Figure 1, and when router bit 2 is used, router bit 1 is located at the top of router machine 3, as shown in Figure 3. Located in In addition, the motor 4 is provided with a M single-pole double-throw switch 7 and a B single-pole double-throw switch 8, and the frame 5 part KFi, A stopper 9 and B stopper loss are fixed with screws l]'. When the router bit 1 is used, the single-pole double-throw switch 7 and the stopper 9 are in contact with each other, and when the router bit 2 is used after the motor 4 has been rotated about the shaft 6, the single-pole double-throw switch 7 is in contact with the stopper 9. The single-pole double-throw switch 7.8 and the stopper 9.1o are arranged so that the switch 7.8 and the stopper 10 are in contact with each other. Further, an open/close switch 12 is fixed to the motor section with a screw 11, and a switch 17 is configured such that the operation of the open/close switch 12 rotates and stops the motor 4, and operates and stops the router bit 1 and the router bit 2. Temeru.

FIG. 2 is an electrical circuit diagram of FIG. 1. In Figure 2,
Between the rotor B of the motor 4 and the stator 14, *q double-throw switches 7 and 8 are connected as shown in the figure, and the stator 1
An on/off switch 12 is connected between 4 and a power source 15. Further, the single-pole double-throw switch 7 has a common terminal, an A terminal 17, and a B terminal 18 as contact terminals, and the terminal 16
．． 17, or between terminals 16 and 18. In addition, there are 8 single-pole double-throw switches, with a common terminal 16 and a C terminal 19 as contact electronics. D terminal 20
The terminals 16.6 may be closed or the terminals 16.6 may be closed.
20 to close the circuit. When the loop and tabit l as shown in FIG. Stopper 1
Since it does not touch 0, the contact is open and the contact is closed (broken line). When the router bit 29f as shown in FIG. 3 is used, the circuit is reversed to the above, and the circuit between the contacts 16 and 18 is closed (broken line), and the circuit between the contacts 16 and 19 is closed (solid line).

In the above configuration, when using the router bit 1), if the close switch is turned on, the motor 4 will rotate normally, and if interrupted, it will stop, thereby operating and stopping the router bit 1. Also,
If you turn on/off switch when using router bit 2,
The motor 4 rotates in reverse and stops when cut off, and the router bit 2 is operated and stopped. - However, the above-mentioned method has the following drawbacks.

(1) The open/close switch that operates and stops when using the Router Bit 1 and Router Bit 2 is fixed to the motor 4, so when the motor 4 rotates around the Yaft 6, it rotates at the same time. Confirmation of the position is required, resulting in poor operability and slow operation during emergency stop, which poses a problem in terms of ensuring safety.

(2) Since the circuit is automatically switched by the single-pole double-throw switch 7 and the stopper 9, and the single-pole double-throw switch 8 and the stopper 1O, it is necessary to arrange these mutually with high precision. be.

0) If a misalignment occurs between the single-pole double-throw switch 7 and the stopper 9, or between the single-pole double-throw switch 8 and the stopper loss during use, router bit 1 or 2 will not operate even if the on/off switch is turned on. This makes it difficult to distinguish the router bit 1 or 2 from being inoperable due to a disconnection of the rotor 13 or stator H of the motor 4, making it difficult to investigate the cause. Furthermore, if a positional shift occurs between them due to an external force during rotation of the mode, the single-pole double-throw switch 7 and the single-pole double-throw switch 8 will exhibit the connection shown by the broken line in the circuit diagram, and the rotor 13
Both ends of the rotor B are short-circuited, and the residual magnetic flux of the stator 14 causes the rotor B to
An excessive current flows through the single-pole double-throw switch 7 and the single-pole double-throw switch 8 due to the back electromotive force, significantly shortening the switch life. In some cases, sparks may be generated from the rotor 13, creating a safety problem.

The present invention has been made in view of the above, and an object of the present invention is to provide an electric device that can improve operability and safety, and can prevent erroneous operation.

The features of the present invention include the action of a changeover switch that reverses the direction of current flowing through the stator in the switch operating section to rotate the series-wound commutator motor in the forward and reverse directions, and the action of an open/close switch that opens and closes the power supply. There are two switches that allow
These two switches are used to rotate the motor forward, reverse,
The main point is that the circuit is configured to perform a stop.

The present invention will be explained in detail below with reference to FIGS. 4 to 1O.

FIG. 4 is a front view showing an embodiment of the electric equipment of the present invention.
The case of a router machine is shown as an example. In Figure 4,
21 is a router machine, and the motor n of the router machine 21 has an A router bit l and a B router bit 2 at both ends.
It is a series commutator motor having an electric direction that rotates in forward and reverse directions depending on the use of router bit 1 or router bit 2.

The motor 22 is rotatably connected to a shaft 24 installed on the frame 23 of the router machine 21, and rotates around the shaft U. When the router bit 1 is used,
As shown in FIG. 4, router bit 2t is located at the top, and when router bit 2 is used, router bit 1 is located at the top, as shown in FIG. In addition, in the motor part,
A single-pole double-throw switch 25 that pairs with router bit 1 and B single-pole double-throw switch 26 that pairs with router bit 2,
The router bits 1 and 2 are fixed with screws or the like so as to sandwich the shaft 24 at the same angle θ (180° in the example) with the shaft 24 as the center. Figure 6 is a perspective view of the single-pole double-throw switch 25 and 26, and FIG. be. The single-pole double-throw switch 25,26 has four ON pushbuttons and an OFF pushbutton on the operating section, and the switch 25 has a common contact 31, an A contact 32, The switch 25 has a B contact 33, and the switch 25 has a
)K as shown, the common contact 31. It has a C contact 34 and a D contact A, and when the ONN button 29 is pressed, the 5 switch contacts 31X31! The contact between the switch 26 and the contacts 31 and 34 is closed (hereinafter referred to as 00M-0) (hereinafter referred to as 00M-A). Also, the OFF button)
When is pressed, the switch 25ijOOM-B is set and the switch 26 is set OOM-D. The combinations of push button operations for the single pole double throw switches 25 and 26 are (ON,
ON), (ON, 0FF), (OFF, ON), (OF
F, 0FF) (Switch 25 shown before in parentheses)
, press the operated button of the switch 26 shown later. ) There are four ways. Looking at the contacts, (COM-A.

00M-(3), (COM-A, OOM-D), (O
OM-B, 00M-0), (OOM-B.

cOM-D) circuit combination.

FIG. 7 is a circuit diagram showing an embodiment of the electric circuit shown in FIG. 4. In Fig. 7, the rotor of the opening motor 22, 37 a stator, 41 a power supply, 5.26 a single-pole double-throw switch A, and a single-pole double-throw switch B, which are connected as shown. be.゛In this case, among the above four combinations, (OOM-A, C0M-D), -(coM-B,
coy-c), ('c.

By using three combinations (M-BOOM-D), the motor 22 can be rotated forward, reversed, and stopped. That is, when the motor 22 rotates normally, if the O'N pushbutton 29 of the switch 25 or the OFF pushbutton of the switch 26 is operated (COM-A).

00M-D), and the rotor rotates normally. Next, when the motor is stopped, press the OFF button of the switch 25, (OOM-B1.OOM-D)
As a result, the electric circuit is interrupted and the rotor 36 stops. Next, when the motor n is reversed, the switch 5 is kept in the state where the motor 22 is stopped, and if the ON/OFF button 29 of the switch 26 is operated, (C
OM--B.

(30M-0) circuit combination, the relationship between the rotor 36 and stator 37 is opposite to that during normal rotation, and the rotor 3
6Fi is reversed. Next, when the motor is stopped, if you operate the switch (OFF button), (COM-B,
OOM-D) is a combination of the above circuits, and the rotor 36
stops.

As described above, the motor 22 can be rotated in the normal direction by simply operating the single-pole double-throw switches 25 and 26. Although reversing and stopping are possible, in order to prevent erroneous operation, in the embodiment of the present invention, as shown in FIG.
The switch cover 39 having the following structure is attached to the frame 23' of the router machine 21 using screws. and,
When using the router bit A, position the single-pole double-throw switch 25 in the pushbutton operation space 3B of the switch cover 39, and operate the ON/OFF button 29 and 0IFF pushbutton (capital) of the switch 25. , the motor 22 can be rotated forward and stopped. At this time, the B single-pole double-throw switch is opened and the push button is in the OFF state inside the switch cover 39 and cannot be operated, so there is no possibility of erroneous operation. Furthermore, when the B router bit 2 is used, when the motor 22 is rotated by θ degrees around the shaft 24, the router pit l is located at the upper part, as shown in FIG. 3
The pushbutton operation space 9 is no longer located, and a switch is located in the operation space 38 instead.

In this state, the B single-pole double-throw switch 26 is ON/OFF.
The motor n can be reversed and stopped by operating the OFF button 29 and the OFF button. At this time, since the A single-pole double-throw switch 5 stops the motor 22 when rotating the motor 22, the push button is set to 0IF.
It is hidden inside the switch cover I when F is operated.

According to the embodiment of the present invention described above, the processing tool uses a plurality of processing tools, ie, router pins 25 and 2, and a plurality of switches, ie, single-pole double-throw switches 25 and 26. The switch cover 39 is arranged in such a way that the corresponding switch can be operated when the switch is in the use position, and the switch cover 39 has a push button operation space 38, so that only the switches that need to be operated can be operated. , single-pole double-throw switch δ, 26 has good operability, and
Since the operating position is always the same, it can be operated quickly in the event of an emergency stop, increasing safety. Furthermore, it is possible to prevent erroneous operations. Also, by operating single pole double throw switches 4 and 26, motor 2
2, forward rotation, reverse rotation, and stop can be performed, and the conventionally required on-off switch is no longer necessary, making it possible to reduce the size and weight of the electric equipment itself. Furthermore, when the mode is stopped, the stator 37 becomes a short-circuited circuit, and the single-pole double-throw switch 5
．． No excessive current flows through the rotor 26, which improves the life of the switch and prevents the generation of sparks from the rotor 36.

FIG. 9 is a circuit diagram corresponding to FIG. 7 showing another embodiment of the present invention. In FIG. 9, instead of the single-pole double-throw switch 5 shown in FIG. Double throw switch and (
A double-throw switch 45 that can switch between 30M-0 and 30M-0, and a 2-pole single-double-throw switch 47 that can be simply opened and closed are used, and are connected as shown in the figure. In FIG. 9, the same parts as in FIG. 7 are designated by the same reference numerals.

In this case, the circuit combinations of the two-pole single-double-throw switch 47 include ((!OM-A, closed) (OOM-c, closed)], [(CO・M-A, closed)( COM-D, open)],
((()30M-B, open (OOM-0, closed)) (<cO
There are 44 ways of
The normal rotation, reverse rotation, and stop of 2 can be performed using a 2-pole single-double-throw switch 47. In this case, the single-throw switch 6.46 is connected in parallel between the rotor and the power supply 41, so in the event of an abnormal phenomenon such as a short circuit in the winding inside the rotor, the single-throw switch 6.46 There is an advantage that the power supply 41 can be interrupted. Furthermore, since the power supply 41 to the motor 22 is normally turned on and off using a two-wire system, safety is further improved.

In the embodiment shown in FIG. 4, processing tools, ie, router bits 1.2, are arranged at both ends of the motor n, as shown in the phase diagram.

The present invention can be applied to a router machine 50 having a structure in which router bits 1 and 2 are provided at both ends of a spindle 49 that is connected to a motor 22 by a rotational force transmission means such as a belt 48, and similar effects can be obtained. It will be done.

As described above, according to the present invention, operability and safety can be improved, and erroneous operations can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional router machine, Fig. 2 is an electric circuit diagram of Fig. 1, Fig. 3 is a front view of the motor shown in Fig. 1 after rotation, and Fig. 4 is a front view of the present invention. A front view showing an example of an electric device (router machine), FIG. 5 is a diagram showing A and B in FIG.
A perspective view showing an embodiment of the $ pole double throw switch, FIG. 6 is an explanatory diagram of the operation of the single pole double throw switch shown in FIG. 5, and FIG. 7 is a circuit diagram showing an embodiment of the electric circuit shown in FIG. 4. , FIG. 8 is a front view showing the state of the motor shown in FIG. 4 after rotation, FIG. 9 is a circuit diagram corresponding to FIG. FIG. 7 is an explanatory diagram of main parts showing another embodiment. 210. router machine, 222. Motor, Sae1. Shaft, 5.260. Single pole double throw switch, 42145・, double throw switch, 43.46. , single-throw switch, 47
,．． 2 pole single double throw switch, 480. Belt, 49°, spindle. Name of patent applicant Hitachi Koki Co., Ltd. 1st figure, 3rd figure + 4th figure 7/1 -1-5 figure + 6th figure off figure? 5 Igtg +9 figure thousand 10 no

Claims (1)

[Claims] 1. A series commutator motor that reverses the direction of current flowing through the stator to perform forward and reverse rotation, and has both ends of the motor or a spindle connected to the motor by a rotational force transmitting means. In an electric device having a processing tool at both ends and provided with a changeover switch for rotating the motor in forward and reverse directions and an on/off switch for opening/closing a power source, a switch operation section is made to perform the functions of the changeover switch and the function of the open/close switch. 2tt
An electric device characterized by having a circuit configuration in which an IA switch and a switch are provided, and the two switches are used to rotate the motor in the forward direction, reverse direction, and stop the motor. A single-pole, double-throw switch configured to switch between one contact and two other contacts, wherein one of the two switches is an off-four switch.
combination of (on, on), (on, off), (off,
(On), -(Off, Off), (On, Off), (
The electric device according to claim 1, wherein the motor is rotated forward, reversed, and stopped using three combinations of OFF, ON), and OFF, OFF. 3. The two switches are two-pole, consisting of a single-pole, single-throw switch configured to turn on and off by switching between a common contact and two other contacts, and a single-pole, single-throw switch that simply opens and closes. It is a single double throw switch, and the two 2
Four combinations of pole single-throw switches [(on, closed), (on, closed)], [(on, closed), (off, open)], [(off, open), (on, closed)] , [(off, open), (off,
Open)], [(On, Closed), (Off, Open)], [(
The motor is rotated in the forward direction, reverse direction, and stopped using three combinations of [off, open), (on, closed)], [(off, open), (off, open)]. Electric equipment described in scope 1.