JPS6262408B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a motor type time switch.

Conventionally, this type of time switch has a time limit setting mechanism that can set the time limit arbitrarily by external operation, and a recessed part formed in a part of the outer periphery of a perfect circle that rotates by an angle corresponding to the time limit setting position of the time limit setting mechanism. It has a rotary cam that moves, and an output gear that is mounted on the same axis of the rotary cam and receives the rotational output obtained by decelerating the rotational output from the motor by a reduction gear mechanism, and the rotational output of this output gear is unidirectionally The transmission was transmitted to the rotating cam via the clutch, and the contacts were opened and closed by a switch lever that was linked to the rotating cam.

The contact point is configured to return when the time limit setting mechanism returns to its initial position and the protrusion of the switch lever fits into the recess of the rotary cam.

However, in the case of the above-mentioned rotating cam, the above-mentioned rotating cam rotates at a very low speed, and a small-diameter rotating cam is used to make the time switch more compact. The protrusion of the switch lever cannot be quickly inserted into the recess, and the contact gradually returns to its original position, resulting in burnout due to arcing and shortening the life of the contact. Furthermore, during assembly, it is necessary to adjust the initial position of the time limit setting mechanism so that the concave part of the rotary cam and the convex part of the switch lever are fitted together, which is time-consuming and requires a large number of parts, resulting in high work costs. There are problems such as high

Furthermore, among the rotary cam types described above, there is one in which only the motor contact is turned off at the maximum rotation angle position of the rotary cam, and the time limit setting mechanism is turned on, that is, continuous operation is performed. In such a case, the time limit setting mechanism must also be turned OFF, so in order to stop continuous operation, the rotating cam must be fully rotated to its initial position, which can easily damage the one-way clutch. Since the switch wears out rapidly, we currently have a separate ON/OFF switch with a time limit setting mechanism.
This has led to the complexity of the device including the time switch.

This invention was made in view of the above problems, and it is possible to quickly return the contact point, eliminate the need for initial position adjustment during assembly, and also make it possible to turn off the time-limited setting mechanism immediately adjacent to the continuous operation position. The purpose is to provide a switch.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an exploded perspective view of the time switch of this embodiment, which includes a synchronous motor 3 mounted on a base frame 1, an idle gear 4, a reduction gear mechanism 5, a frequency switching mechanism 6,
A one-way clutch mechanism 9 consisting of a pinion gear 7 and a spring 8, a slider 10, and a speed plate 11
and first and second switch levers 12 and 13,
The base frame 1 is generally composed of a motor contact 14 and a time limit contact 15, which are switched by these switch levers 12 and 13, respectively.
A lid 2 is placed over the lid 2, and a fitting claw 2a extending from the lid 2 is fitted into a fitting hole 1a of the base frame 1, thereby fixing the base frame 1.

The motor 3 is attached from the back of the base frame 1 to a motor mounting portion 1b formed at one end of the base frame 1, and is fixed to the base frame 1 by a locking claw 1c.

The idle gear 4 is an output gear 3 attached to the rotating shaft of the motor 3, as shown in FIGS. 2 and 3.
a, and transmits the rotational output of the motor 3 as it is to the first reduction gear 5a of the reduction gear mechanism 5, and the shaft of the idle gear 4 is connected to the motor mounting portion 1b.
It is integrally formed on the top surface of.

As shown in FIG. 3, the reduction gear mechanism 5 consists of eight reduction gears between 5a and 5h installed on the base frame 1 in parallel with the motor 3, and converts the rotational output from the motor 3 into a predetermined speed. The rotational speed is reduced and the reduced rotational output is transmitted to the input gear 7' below the pinion gear 7.

The frequency switching mechanism 6 switches gears according to the power supply frequency of 60/50Hz, and as shown in FIG.
By externally switching the switching lever 6d, the gear mounting portion 6a is rotated by a predetermined angle, and as shown in FIG. Between the gears 6b, 6
(c) meshes with each other to transmit rotational output at a predetermined rotational speed.

The one-way clutch mechanism 9 includes a pinion gear 7
As shown in FIG. 3, the pinion gear 7 is integrally attached to the upper end of a flexible pinion shaft 7a, and a reduction gear is connected to an input gear 7' also attached to the lower end. Mechanism 5
The rotational output decelerated from the pinion gear 7 is transmitted to the pinion gear 7.

The upper end of the pinion shaft 7a is movably supported in a triangular hole 2b formed in the lid 2, and is further pressed by a spring 8.
Due to this pressing force, the pinion gear 7 meshes with a rack 10a formed on the side surface of the slider 10 along the sliding direction, and the rotational output from the motor 3 causes the slider 10 to move backward and return to its initial position. Further, when the slider 10 is slid by an external operation, the pinion shaft 7a is bent and the pinion gear 7 and the rack 10a are disengaged, allowing the slider 10 to slide freely.
The slider 10 has a substantially rectangular parallelepiped shape as shown in FIG. 1, and has a lever 10b vertically protruding from the center of its upper surface, and a rack 10a extending along the sliding direction from the upper edge of one side thereof. It is formed. The slider 10 is slidably housed in a rectangular box-shaped slide case 1d that is integrally formed in parallel with one side of the case 1, and the lever 10b is inserted into a slit 2c formed in the lid 2.
The slider 10 protrudes from the top and can be slid by external operation.

One end of the slider 10, that is, the forward end during manual operation, is tapered to form a tapered portion 10c, and when setting the time limit, the tapered portion 10c controls the first and second switch levers 12, 13. The claw portions 12a and 13a can be smoothly guided and brought into contact with the side surface of the slider 10.

Further, a projection 10d protruding in the form of a thin line is formed on the lower surface of the slider 10, and a linear guide groove 1e (a second
) are formed, and these allow the slider 10 to slide smoothly within the slide case 1d.

As shown in FIG. 1, the quick-moving plate 11 is a substantially rectangular plate in which a fitting hole 11a is formed which loosely fits into the protrusion 10d on the lower surface of the slider 10 with play in the sliding direction, It is bonded between the slider 10 and the slide case 1d, and can freely move relative to the slider 10 by a certain distance in the sliding direction, and can move inside the slide case 1d along with the slider 10. It slides.

When setting the time limit by sliding the slider 10 by external operation, the speed plate 11
is located on the right in the figure, and its tip 11b is located at a position lower than the tapered part 10c of the slider 10, and when the slider 10 moves backward and returns, it is located on the left in the figure and its tip The portion 11b moves together with the slider 10 so as to be aligned with the tip of the tapered portion 10c, and when the slider 10 returns to the initial position, the claw portion 13a of the switch lever 13 that was in contact with the side surface of the quick-moving plate 11 The first and second switch levers 12, 1 are moved momentarily to the right in the figure by being pressed by the switch levers 12, 1.
3 are both instantaneously returned to their initial positions.

As shown in FIG. 1, each of the switch levers 12 and 13 is rotatably supported at one end by a shaft 1f integrally formed with the base frame 1.
Claw portions 12a, 13a and contact operating portions 12b, 13b are formed on the free end sides of these, and the contact operating portions 12b, 13b are each provided with a contact piece 1.
7 and 19 to open and close the contacts.

The motor contact 14 and the time-limited contact 15 are arranged in parallel and one end thereof is fixed to the base frame 1, and the contact pieces 16 and 17 forming the motor contact 14 are normally open contacts, and the contact pieces forming the time-limiting contact 15 are Contact piece 18, 1 among pieces 18, 19, 20
9 is a normally open contact, and contact pieces 19 and 20 are normally closed contacts.

The claw portions 12a and 13a protrude into the slide case 1d when the contact operating portions 12b and 13b are pressed by the spring pressure of the contact pieces 17 and 19, and the slider 10
is in the initial position, the claws 12a, 13a
is in the gap formed by the tapered portion 10c, the motor contact 14 is opened to stop the time switch, and when setting the time limit, the pawl portion 12 is opened.
a, 13a contact the side surfaces of the slider 10 and the speed plate 11, respectively, and the switch levers 12, 1
3 rotates to close the motor contact 14 and operate the time switch. Further, when the slider 10 returns to its initial position, the claws 12a and 13a are suddenly dropped into the gap by the fast moving plate 11, as will be described later, so that the time-limiting contact 15 and the motor contact 1
4 will be instantaneously reversed.

In the time switch configured as described above, the speed plate 11 is loosely fitted to the protrusion 10d on the lower surface of the slider 10 as shown in FIG. 4A, and the slider 10 is moved from the initial position as shown in the figure. When the fast moving plate 11 is slid in the direction of the arrow A to set the time limit, the left end of the fitting hole 11a in the figure is hooked on the projection 11a, and the fast moving plate 11 moves together with the slider 10. At this time, the tip 1 of the fast moving plate 11
1b is located at a position lower than the tapered portion 10c,
Claw portions 12a, 13a of switch levers 12, 13
is guided by the tapered portion 10c and comes into contact with the side surface of the slider 10, and rotates the switch levers 12 and 13 in the direction of arrow B to reverse the contact point and operate the time switch.

When the slider 10 is in the return operation state after setting the time limit, as shown in FIG. 4B,
The fast-moving plate 11 moves together with the slider 10 as the right end of its fitting hole 11a in the figure is hooked on the protrusion 11a. At this time, the tip 11 of the fast moving plate 11
b is located in line with the tip of the tapered portion 10c,
As the slider 10 approaches the initial position, the claw parts 12a13a of the switch levers 12 and 13 and the tapered part 10c
Even if this occurs, the contact cannot be restored because the claw portion 13a is in contact with the side surface of the fast-moving plate 11.

Further, when the switch lever 10 returns to the initial position, the tip 11b of the speed-moving plate 11 reaches the claws 12a, 13a, and the speed-moving plate 11 is pressed by their pressing force, as shown in FIG. 4C. As the switch levers 12 and 13 move rapidly in the direction of arrow C, the switch levers 12 and 13 momentarily return to their initial positions, and their contacts are momentarily reversed. In this way, the fast-moving plate 11 moves the slider 1
When returning to the initial position of 0, the switch levers 12, 13
The switch levers 12, 13 are prevented from gradually rotating back along the tapered portion 10c, and the switch levers 12, 13 are
By rotating the contact point back to its original position, the reversing operation of the contact point is instantaneously performed.

Further, on the rear side surface of the slider 10, a lower position connected to the rear end of the speed-moving plate 11, that is, a sliding contact surface of the first switch lever 12 is shown in FIGS. 2, 5, and 6. As shown in a, a tapered first notch step 10t is formed and its extension is flattened, and the upper part of the first notch step 10t, that is, the second switch in the slider 10 is cut out. Lever 1
The sliding contact surface 3 is further extended to the rear side, and the extended portion also has a tapered notch step 1 similar to the above.
0e is formed.

Therefore, as shown in FIG.
From the state where the claws 12a and 13a of 2 and 13 are respectively on the side of the switch lever 10 and are in sliding contact with the side of the speed plate 11 and the slider 10, that is, when each contact is in the ON state, the slider 10 is moved by manual operation as shown in the arrows. If you move it forward in the A direction, the first
The claw portion 12a of the switch lever 12 is the contact piece 17.
The biasing pressure causes the motor to enter the first notch step 10t, thereby turning off the motor contact.

Next, when the slider 10 is moved further forward, the claw portion 13a of the second switch lever 13 enters into the second notched step portion 10e, turning off the time limit contact.

That is, at the position shown in FIG. 6a, the time switch is activated and the slider 10 is returned to its original position in accordance with the set time.
By sliding the slider 10, only the motor is turned off, and only the time setting mechanism is operated without returning to the original position, that is, continuous operation is performed. Next, when the slider 10 is further slid from this continuous operation state, the time limit setting mechanism is also turned off.

Further, at the upper edge of the slider 10, a flat portion 10f is connected to the rear extension of the rack 10a, and a pinion 7 as shown in FIG.
a first depression for storage of 10g and this depression 1
The protrusion 10h connected to 0g, and this protrusion 10
The second recess 10i connected to h is continuously extended as a trapezoidal unevenness.

The first depression, the second depression 10g,
10i and the protrusion 10h, and the first and second notch steps 10t and 10e, as shown in FIG. The arrangement relationship between the first notch step 10t and the recess 10g is set so that the pinion 7 disposed at the rear position enters the first recess 10g immediately before entering the sixth recess 10t. As shown in FIG. c, before the pawl 13a of the second switch lever 13 enters the notch step 10e, the pinion 7 rides on the protrusion 10h, and then immediately before the pawl 13a enters the notch step 10e. The pinion gear 7 is set to quickly enter the second recess 10i.

However, in this arrangement, if the contacts of the motor or time setting mechanism are switched,
At the same time, the pinion 7, which is biased toward the switch lever 10, elastically enters the recesses 10g and 10i, producing a clicking sound, providing a good operating feeling during continuous operation and when stopping the drive. The deflection of the shaft portion 7a is also absorbed by the pinion 7 entering into the recesses 10g and 10i.

As explained above, in the time switch of the present invention, the time limit setting mechanism is of a sliding type,
The switch lever is rotated by the slider that constitutes this, and a fast-moving plate is installed in this part so that the contact returns instantaneously when the slider returns to the initial position, so that when the contact is reversed, There is no possibility of arcing between the contacts and burning out the contacts, which extends the life of the contacts.Also, the initial position of the time setting mechanism does not need to be adjusted by simply inserting the slider into the slide case. It has advantages such as improved work efficiency.

Further, in the present invention, at the most forward position of the above-mentioned switch lever at the time of starting operation,
In addition to turning off only the motor contacts,
Since the time limit setting mechanism can also be turned off immediately after the OFF point, there is no need to return the switch lever to its original position, as was the case in the past when stopping the equipment from continuous operation. Since the drive of the device can be stopped, there is no damage to the one-way clutch mechanism, etc., and the durability is good.Moreover, when this is incorporated into the device, a changeover switch for the time limit setting mechanism is provided separately. This is not necessary, and the device can be simplified.

Furthermore, as shown in the embodiment, if the pinion gear is clicked in conjunction with switching the motor contact and the time-limit contact during the manual operation, a good operating feeling can be obtained, and the shaft of the pinion gear Since the deflection of the clutch itself is also absorbed, it has various advantages such as improving the durability of the pinion, which is an important part of the one-way clutch.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the time switch according to the present invention, Fig. 2 is a plan view when the lid is removed, and Fig. 3 is a line AA and B-B in Fig. 2. 4A to 4C are explanatory plan views showing the movement of the speed plate, Fig. 5 is a side view of the slider, and Figs. 6a, b, and c show the movement of the slider, switch lever, and pinion. FIG. 1d...Slide case, 3...Synchronous motor,
5... Reduction gear mechanism, 7... Pinion gear, 9...
...One-way clutch mechanism, 10...Slider, 1
0a...Rack, 10t, 10e...Notch step,
11... Speed plate, 12, 13... Switch lever, 12a, 13a... Claw portion, 12b, 13b...
...Contact operation section, 14, 15...Contact.

Claims (1)

[Claims] 1. A slider that is housed in a slide case so as to be slidable back and forth, can be positioned arbitrarily by external operation, and has a rack formed along the sliding direction, a motor, and a reduction gear mechanism that reduces the rotational output of the motor. , a one-way clutch mechanism having a pinion gear meshing with the rack of the slider, and driving the pinion gear with the rotational output of the reduction gear mechanism to slide the slider backward toward an initial position; a fast-moving plate that is mounted between the slide case and can freely move relative to the slider by a certain distance in the slide direction, and that slides within the slide case along with the slider; first and second switch levers for a motor contact and a time limit contact, each of which has one end slidably in contact with the upper and lower positions of the side surface of the slider and the speed-moving plate, respectively, when the switch levers are appropriately slid from the initial position; The other end of the lever is provided with a motor and a time-limiting contact that are interlocked with these switch levers, and a first notch is provided in the sliding contact surface of the first switch lever on the rear side of the slider, and a first notch is provided in the sliding contact surface of the first switch lever on the rear side of the slider. On the rear side, the second
A second notch is formed in each sliding contact surface of the switch lever, and the motor contact is switched by engaging the first switch lever with the first notch when the slider is in the sliding forward position.
A time switch characterized in that the time switch is turned OFF and further the time limit contact is switched OFF by engaging a second switch lever with a second notch at the most advanced position of the slide.