JPS628114Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a motor-type return type time-limited relay.

Conventionally, in this type of time-limited relay, a driven gear is set at an arbitrary rotation angle by a time-limited setting device, and the rotational force from a synchronous motor is transmitted through a clutch mechanism interlocked with a movable iron piece of an electromagnet to bring it to the zero position. There is a device that opens and closes the time limit contact by rotating the time limit card slightly in conjunction with the cam portion of the driven gear when the time limit card rotates up to . There are two types of time-limited relays: those with a movable pointer that indicates the elapsed time and those without. Conventionally, the movable pointer was provided either integrally with the driven gear or separately, so this driven gear was attached to the main body. It was necessary to decide which type to manufacture before incorporating it into the system. In other words, before the driven gear is incorporated, the main body of the time-limited relay is still in the process of being assembled, and it is not possible to stock up on the main body because both types are shared, resulting in poor assembly line efficiency and disadvantages in terms of mass production. It was a lot.

The present invention was developed in view of these drawbacks, and its purpose is to allow the same driven gear to be used in both types with a movable pointer and types without a movable pointer. An object of the present invention is to provide a time-limited relay that can improve line efficiency.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which are examples of the present invention.

Figures 1 to 5 show a self-resetting type time-limited relay according to the present invention, and schematically show a frame 1.
, the electromagnet 10 , the contact drive section 30 , the clutch mechanism 45 , the contact mechanism 50 , and the Warren motor 7
5, a base 85, a case 86, and the case 86
It consists of a time-limited setting device 88 attached to the top surface of.

The frame 1 is made by outsert-molding resin on a metal plate, and an indicator lamp 8 is attached to the side of the mounting base 2.
A printed circuit board 9 holding a is installed.

The electromagnet 10 is constructed by fitting a spool 13 with a coil 14 wound around an iron core 12 fixed to an iron core frame 11, and attaching a movable iron piece 15 to the tip of the iron core frame 11 so that the movable iron piece 15 can rotate freely and applying a return force with a return spring 16. The iron core frame 11 is mounted on the mounting base 2 of the frame 1.
It is fixed by tightening screws 17, 17 from the side pieces 11a. The operation lever 18 transmits the operation of the movable iron piece 15 of the electromagnet 10 to the contact drive unit 30 and the clutch mechanism 45 via a conversion lever 26, which will be described in detail below, and also operates the instantaneous contacts 52, 54a,
54b, which opens and closes the guide holes 19, 19.
(see Fig. 6 A) is loosely fitted into the protrusion 24 and pin 25 (see Fig. 2) of the guide plate 23 so that it can slide freely in the left and right directions in Fig. 2. 15 is engaged with a protrusion 15a formed at the center in the width direction of the distal end. Note that the guide plate 2
3 is fixed by inserting the protrusion 24 and pin 25 into the holes 69a, 69b, and 69c of the terminal block 65 shown in FIG. The conversion lever 26 is the seventh
As shown in the figure, the center hole 27 is loosely fitted into the pin 25 of the guide plate 23 and is rotatably mounted.
The operating piece 28a for operating the time limit card 31 of the contact drive unit 30, the clutch lever 4 of the clutch mechanism 45
The operating piece 28b for operating the 6, and the protrusions 29a, 2 at rotationally symmetrical positions of approximately 180° about the rotational fulcrum.
9b is provided protrudingly. This protrusion 29a engages with a groove 21a formed on the side of the operating lever 18.

In addition, in the case of a self-resetting type as in this embodiment, the operation lever 18 shown in FIG. The iron piece 15 rotates clockwise in FIG.
When the operation lever 18 moves to the left in FIG. 2, the conversion lever 26 rotates clockwise, and when the operation lever 18 is demagnetized and moves to the right, the conversion lever 26 rotates counterclockwise. On the other hand, when using the electric return type, the other configuration remains the same, and the operating lever 18 shown in FIG.
6 is engaged, and the conversion lever 26 is rotated counterclockwise when energized and clockwise when demagnetized, contrary to the self-resetting type, based on the excitation and demagnetization of the electromagnet 10. We are trying to transform the movement. These series of operations will be detailed later.

The contact drive unit 30 includes a time limit card 31 and a driven gear 4.
0, and the time limit card 31 is the frame 1 above.
The contact operating pieces 32a,
32b, a cam follower piece 33, one end of which is locked to the tip of the operation piece 28a of the conversion lever 26, and the other end of the coil spring 39 is locked to the protrusion 34, thereby rotating the coil spring 39 in the counterclockwise direction in FIG. is constantly energized. Further, the time limit card 31 is operated by rotating the conversion lever 26 counterclockwise as described below and contacting the operating piece 28a with the adjustment member 36 attached to the protrusion 35, as shown in FIG. It rotates in the rotational direction and is restrained. The adjustment member 36 has an eccentric hole (not shown) that fits into the protrusion 35 of the time limit card 31, and by rotating it to an appropriate angle, the position where the operation piece 28a of the conversion lever 26 comes into contact can be finely adjusted. be. The driven gear 40 is formed with a ring-shaped cam part 41 having a cutout part 41a on its lower surface, and has a support shaft 4 protruding from the frame 1.
A coiled return spring 44 is rotatably attached to the
It is constantly biased in the clockwise direction in FIG. 1 by the unwinding force (see FIG. 3).

Here, the time limit setting device 88 is shown in FIGS. 13 and 14.
This will be explained with reference to the figures. A knob 89 equipped with a selection pointer 90 is integrally connected to a knob shaft 92 with a screw 91, and a scale plate 87 is attached via a spring plate 95 installed between a flange 93 of the knob shaft 92 and a case 86. The case 86 is rotatably attached to the upper surface of the case 86 by applying a suitable rotational torque. The movable pointer 97 is a knob shaft 9 integrated with the knob 89.
2 is rotatably attached to the lower surface of the driven gear 40 via a pin 96, and a protrusion 98 protruding from one end is connected to the driven gear 40.
A recess 4 formed between the protrusions 42a and 42a on the upper surface of the
2b (see Figure 1). Therefore, the movable pointer 97 is biased clockwise by the driven gear 40 and its return spring 44.
This biasing force is regulated by the movable pointer 97 coming into contact with a stopper 94 provided on the lower surface of the flange 93 of the knob shaft 92 (see FIG. 14).

Therefore, when the driven gear 40 is in the free state,
The driven gear 40 and the movable pointer 97 can be rotated following each other by rotating the knob 89, and time setting is performed by appropriately rotating the knob 89 to set the driven gear 40 to an arbitrary rotation angle. At this time, the movable pointer 97 is adjusted to match the settling pointer 90.

As shown in FIG. 9, the clutch mechanism 45 has clutch gears 47a and 47b directly connected to the upper and lower ends of a shaft portion 46a formed on a clutch lever 46 to be freely rotatable, and the boss portion 46b is coaxial with the driven gear 40. The return spring 44 is rotatably attached to the support shaft 4, and is constantly biased clockwise in FIG. 1 by locking one end of the return spring 44 to the lever portion 46c. The clutch gear 47a can mesh with the output gear 77 of the Warren motor 75, and the clutch gear 47a can be engaged with the output gear 77 of the Warren motor 75.
7b, since the clutch lever 46 is installed coaxially with the driven gear 40, the clutch lever 4
6, the meshing state with the driven gear 40 is maintained.

Further, when the converting lever 26 is rotated counterclockwise, the operating piece 28b thereof can come into contact with the lever portion 46c of the clutch lever 46. At this time, the clutch lever 46 can be rotated counterclockwise in FIG. The clutch gear 47a is disengaged from the output gear 77 of the Warren motor 75.

As shown in FIGS. 10 to 12, the contact mechanism 50 includes a fixed contact piece 51 having a fixed contact 52 constituting an instantaneous contact, and movable contact pieces 53a and 53b having movable contacts 54a and 54b, which constitute a time-limited contact. A fixed contact piece 55 having a fixed contact 56 and a movable contact piece 57 having movable contacts 58a and 58b.
a, 57b, and the fixed contact 6 that constitutes the motor contact.
0 and a movable contact piece 61 having a movable contact 62. The above fixed contact piece 5
1, 55, 59 are terminal blocks 6 as shown in FIG.
5 by insert molding.

The movable connecting pieces 53a, 57a, 61 are the 11th
As shown in the figure, it is fixed to the terminal block 70 by insert molding, and is integrated by fitting the holes 71, 71 of the terminal block 70 into the protrusions 66, 66 of the terminal block 65. One movable contact piece 53b, 57b is also fixed to the terminal block 72 shown in FIG. 1 or 4 by insert molding, and fixed to the other side surface of the terminal block 65. The above terminal block 70,
For example, the side surface of the movable contact piece 53a is inclined at an angle θ with respect to the installation direction of the movable contact piece 53a, and this side face closely contacts the side face of the terminal 65, so that the movable contact pieces 53a, 53b, 57a, 57b, and 61 can be tilted by themselves. The fixed contacts 52, 5 are biased inwardly by the spring properties of
The contact pressure for 6,60 is obtained.

The contact mechanism 50 which has been made into a block in this manner allows the lower surfaces of the protrusions 67, 67 of the terminal block 65 to come into contact with the mounting base part 2 of the frame 1, and the claw part 6
It is fixed by holding it at 8. At this time, the upper portions of the movable contact pieces 53a and 53b are pressed against the operating piece 22 of the operating lever 18, and the movable contact pieces 53a and 53b
The upper part of 7a, 57b, 61 is the above-mentioned time limit card 31
The contact operation pieces 32a and 32b are pressed against each other.

The Warren motor 75 is a well-known motor consisting of a rotor section 76 equipped with an output gear 77, a stator section 78 consisting of an electromagnetic core 79 with bear coils 80, 80, and an electromagnetic coil 81. It is designed to be temporarily fixed to the lower surface of the mounting base 2 of the frame 1 by gripping claws (not shown).

Next, the operation of the time-limited relay (self-resetting type) having the above configuration will be explained.

First, when the power to the electromagnet 10 and Warren motor 75 is turned off, the electromagnet 10 is demagnetized, so the movable iron piece 15 returns and rotates counterclockwise in FIG. 1, and the operating lever 18 moves to the right. , the instantaneous contact driven by the operation piece 22 opens and closes the movable contact 53a and the movable contact 53b.
is closed. At this time, the protrusion 29a of the conversion lever 26 is engaged with the groove 21a of the operating lever 18, so that the conversion lever 26 is slightly rotated counterclockwise from the position shown in FIG. 2 about the pin 25 as a fulcrum.

Due to this rotation, the time limit card 31 is moved to the adjustment member 3.
6 is pressed by the operation piece 28a of the conversion lever 26 and urged clockwise in FIG. is being restrained.
At this time, the contact operation piece 32a of the time limit card 31,
As the time limit card 31 rotates clockwise, the time limit contact and motor contact driven by the time limit card 32b open and close the movable contact 58a, close the movable contact 58b, and close the movable contact 62. are doing.

On the other hand, the operation piece 28b of the conversion lever 26 presses the lever portion 46c of the clutch lever 46, and the clutch lever 46 rotates counterclockwise in FIG. 1 against the spring force of one end of the return spring 44a, and the clutch The gear 47a is the output gear 77 of the Warren motor 75.
The mesh has been released.

The time setting is performed by rotating the knob 89 of the time setting device 88 as described above. That is, the movable pointer 97 and the driven gear 40 are rotated in conjunction with the knob 89 and set to an arbitrary rotation angle.

Now, when the power is turned on, the electromagnet 10 is energized and the movable iron piece 15 is attracted to the iron core 12 and rotates clockwise in FIG. The contact 54b is closed and the indicator lamp 8 lights up. Also, based on the movement of the operation lever 18 to the left, the conversion lever 26
rotates clockwise in FIG. 2, and the operation piece 28a
releases the restraint on the time limit card 31, and at the same time, the operating piece 28b releases the restraint on the clutch lever 46. At this time, the time limit card 31 is pulled by the coil spring 39 and rotates counterclockwise in FIG. The clutch gear 47a rotates in the clockwise direction and meshes with the output gear 77 of the Warren motor 75.

At the same time (when the power is turned on, motor contact 6
0 and 62 are closed), the Warren motor 75 is started, and the rotational driving force is transmitted from the output gear 77 to the driven gear 4 via the clutch gears 47a and 47b.
0, and the driven gear 40 rotates counterclockwise in FIG. 1 together with the movable pointer 97 while winding up the return spring 44. FIGS. 1 to 5 illustrate this state.

When the driven gear 40 rotates by a predetermined angle in the counterclockwise direction in FIG. cam driven piece 3
3 falls into the cutout part 41a of the cam part 41 by the spring force of the coil spring 39, and this fall is caused by the time limit card 31 slightly rotating counterclockwise in FIG. The adjustment member 36 is the converter lever 2.
It is regulated by contacting the operation piece 28a of No. 6. At this time, the time-limiting contacts 58a and 58b are switched (the movable contact 58a is closed, the movable contact 58b is
8b opens), motor contacts 60 and 62 open,
Warren motor 75 stops.

The time-limited operation is thus completed, and when the power is turned off, the movable iron piece 15 returns to the counterclockwise direction in FIG. 1 and returns to the state described at the beginning. That is, the operating lever 18 moves to the right, the movable contact 53a opens and closes, the indicator lamp 8 goes out, and the movable contact 53b closes. At the same time, the conversion lever 26 rotates counterclockwise in FIG. 2, and the operating piece 28a presses the adjustment member 36, so that the time limit card 31 rotates clockwise in FIG. 1 and is restrained. The movable contact 58a, which is a time-limiting contact, opens and closes, and the movable contact 58b closes, and the motor contacts 60 and 62 close. On the other hand, the operation piece 28b of the conversion lever 26 is connected to the clutch lever 4.
By pressing the lever portion 46c of No. 6, the clutch lever 46 is rotated counterclockwise in FIG. 1, and the engagement of the clutch gear 47a with the output gear 77 is released. Further, the movable pointer 97 of the driven gear 40 is moved by the return spring 44 to the stopper 94 (first
4) until it comes into contact with the rotation angle, that is, the rotation angle has been set, and the time is again able to be set.

Although the type with the movable pointer 97 has been shown above, in the case of a type without the movable pointer 97, it is sufficient to simply remove the movable pointer 97 from the knob shaft 92. In this case, the protrusion 42a of the driven gear 40
By coming into contact with the second stopper 94 from the direction of return rotation, the return position of the driven gear 40 is regulated.

As is clear from the above explanation, according to the present invention, the movable pointer is removably attached to the knob shaft, and is also removably engaged with the engaging portion provided on the upper surface of the driven gear. Furthermore, when the movable pointer is removed, the engaging part of the driven gear can come into contact with the stopper of the knob shaft, so when the movable pointer is attached, the driven gear and the knob shaft are connected via the movable pointer. Even if they are connected and a movable pointer is not attached, the engaging part of the driven gear will come into contact with the stopper of the knob shaft, and the two will be connected, regardless of whether the type has a movable pointer or not. The driven gear can be shared without any modification. Therefore, regardless of whether the movable pointer is attached or not, the main body including the driven gear can be prepared in advance, and finally the case with the time-limited setting device installed can be selectively integrated with the main body. This makes it possible to manufacture both types with and without a movable pointer, which increases the efficiency of the assembly line and greatly contributes to the mass production system.

[Brief explanation of drawings]

Figure 1 is a plan view of a time-limited relay according to the present invention;
Figure 2 is a front view of Figure 1, Figure 3 is a back view of Figure 1, Figure 4 is a right side view of Figure 1, Figure 5 is a left side view of Figure 1, and Figure 6 is an illustration. , B is a front view of the operating lever, FIG. 7 is a perspective view of the conversion lever, FIG. 8 is a perspective view of the time limit card, FIG. 9 is a perspective view of the clutch lever, and FIGS. 10 and 11 are views of the contact mechanism. 12 is a plan view of the contact mechanism, FIG. 13 is a half sectional view of the time setting device, and FIG. 14 is a sectional view taken along line A--A in FIG. 13. 10... Electromagnet, 15... Movable piece of iron, 31...
Time limit card, 40... Driven gear, 41... Cam portion, 42b... Recessed portion, 45... Clutch mechanism, 5
0... Contact mechanism, 75... Warren motor, 77
... Output gear, 86 ... Case, 88 ... Time setting device, 89 ... Knob, 92 ... Knob shaft, 9
4...Stopper, 97...Movable pointer, 98...Protrusion.

Claims (1)

[Claim for Utility Model Registration] A driven gear set at an arbitrary rotation angle by a time-limited setting device is brought to the zero position by transmitting rotational force from a synchronous motor via a clutch mechanism that is linked to the operation of a movable iron piece of an electromagnet. In a time relay in which the time limit card rotates slightly in conjunction with the cam part of the driven gear to open and close the time limit contacts when the time limit setting device is rotated to The movable pointer is rotatably mounted on the lower surface of the flange of the knob shaft, and is removably attached to the stopper provided on the lower surface of the flange to prevent the driven gear from rotating in the direction in which it rotates back after a time-limited operation. At the same time, this knob shaft is attached to the case so that the flange is located inside the case, and a part of the movable pointer is removably engaged with the engagement part provided on the upper surface of the driven gear, so that the movable pointer is attached to the driven gear. The knob is fixed to the protruding part of the knob shaft from the case, so that the knob and the knob shaft can be rotated integrally.
The time-limiting relay is further characterized in that when the movable pointer is removed, the engaging portion of the driven gear can come into contact with the stopper of the knob shaft.