JPS6151373B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel switching pawl mounting structure for a multi-action time switch that opens and closes a plurality of switches at a plurality of set times.

Generally, in a multi-acting time switch, the first
As shown in the figure, a plurality of switching pawls 4 are attached to a scale plate 3 that is rotated at a constant speed by a synchronous motor 1 via a transmission wheel train 2 and rotates once a day, and drive teeth 40 provided on the switching pawls 4 Accordingly, the passive teeth 51 of the cam 5 and the passive teeth 61 of the cam 6 are rotated to rotate the cams 5 and 6 to open and close the switches 8 and 9.

As a conventional switching claw mounting structure for this type of multi-action time switch, the structure shown in FIGS. 1 and 2 has been proposed. That is, a large number of locking portions 30 each having a rectangular cross-sectional shape and consisting of grooves 31 and holes 32 are provided radially on the outer periphery of the scale plate 3, which rotates once a day.
For example, if the minimum switching setting time is 15 minutes, 96
The switching pawl 4 is composed of opposing legs 41, 42 and drive teeth 40 corresponding to the grooves 31 and holes 32 of the scale plate 3, and the switching claw 4 is configured with driving teeth 40 for switching between the grooves 31 and holes 32 of the scale plate 3. The setting pawl 4 is mounted on the scale plate 3 by inserting the opposing legs 41 and 42 of the pawl 4, respectively, and causing the locking portion 30 to snap into place.

However, in conventional devices of this type,
As shown in FIG. 2A, the first switching pawl 401 has drive teeth 40 that mesh only with the passive teeth 51 of the cam 5, and as shown in FIG. 2B, the drive teeth 40 mesh only with the passive teeth 61 of the cam 6. as shown in FIG.
Since three types of switching pawls are used, including the third switching pawl 403 having two drive teeth 40 that mesh simultaneously with 1 and 61, there are many types of setting pawls 4, which increases manufacturing costs and management costs. Furthermore, the user must use a device to select setting claws according to the switches 8 and 9 to be operated, which not only makes handling and operation of the time switch complicated;
If any of the three types of switching claws 401, 402, and 403 is lost, it cannot be replaced with another switching claw, which often causes problems in operation. Therefore, extreme care must be taken to prevent loss of switching claws. It was also necessary. In addition, in this type of time switch, for example, if the scale plate 3 rotates once a day and the minimum switching setting time is 15 minutes, there are 32 sets of switching claws 40.
1,402,403 are prepared, so the number of setting claws 401, 402, 403 to be attached differs depending on how many times the switches 8, 9 are opened and closed, and the remaining setting claws 401, 402, 40 However, in a conventional time switch of this type, the remaining setting claws 401, 402, 4 must be stored in a structure (not shown) such as a case near the scale plate 3.
For example, when each switch 8, 9 is to be opened and closed once each, one setting pawl 401, 402, 403 is attached to the scale plate 3 as shown in the first figure. After installation, the remaining 31 sets of setting claws 401, 402, and 403 must be stored, which not only requires a large space to store the remaining claws, but also requires removal from the scale plate 3 and storage in a separate storage section. The setting claws 401, 402, and 403 are difficult to handle, and the setting claws 401, 402, and 403 are easily lost. Also, setting claws 401 and 40 are provided at two locations on the scale plate 3 and the storage section.
2, 403 are installed separately, it is impossible to judge whether all the setting claws 401, 402, 403 are present unless you count the number of both setting claws 401, 402, 403.
1,402,403 has the disadvantage that it is difficult to find the missing one.

This invention was made in view of the above-mentioned drawbacks, and the setting claws are arranged in two positions, one above and one on the side of the scale plate.
By making it possible to attach it to the locking part of the scale plate from any direction, and arbitrarily selecting the attachment state, the driving teeth provided on the outside of the setting claw can be placed in an operating position to operate all or only one of the plurality of switches. By making it possible to appropriately set the switch to a non-operating position where none of the switches can be operated, it is possible to arbitrarily control all or part of multiple switches with one type of setting claw, and the remaining setting claws can be set to a non-operating position. It is an object of the present invention to provide a new time switch that can be housed in a scale plate when placed in a non-operating position.

An embodiment of the present invention will be described below with reference to the drawings. That is, FIGS. 3A, 3B, 3C, and 3 are partial cross-sectional views showing the main parts of the setting claw of the present invention and its installed state, and FIGS. In FIG. 3, 3 is a scale plate, and 30 is a locking part whose two sides are formed by a groove 31 and a hole 32 provided on the outer periphery of the scale plate 3, and the cross-sectional shape is approximately square. has been done. Reference numeral 4 denotes a setting claw made of, for example, synthetic resin having elasticity, and formed in a substantially U-shape. First and second drive teeth 44 and 45 are provided, and a third drive tooth 40 is provided outside one end of the linking side 43.

Therefore, by snapping the setting pawl 4 onto the locking portion 30 from the outside, the steps shown in FIGS.
As shown in C and D, it can be mounted on the scale plate 3 in either direction. Note that, as shown in FIG. 3A, the length l from the inner surface of the leg 41 to the tips of the drive teeth 44 and 45 is shorter than the length L in the radial direction of the scale plate 3 of the hole 32. It is configured so that it can be easily installed as shown in (d).

Next, the mounting state of the setting claw of the present invention constructed as described above will be described in detail.

That is, FIG. 3A shows a state in which the setting claw 4 is attached to the locking part 30 of the scale plate 3 from the side with the leg 41 facing upward and the leg 42 facing downward. 41 and 42 snap onto the upper and lower surfaces of the locking portion 30, and the driving teeth 40 are in a position where they mesh with the passive teeth 51 of the cam 5, functioning as a conventional first setting pawl 401. FIG. 3B shows a state in which the setting claw 4 is attached from the side surface of the locking portion 30 of the scale plate 3 with the legs 42 facing upward and the legs 41 facing downward; in this case, the legs 41, 42 snap onto the upper and lower surfaces of the locking portion 30, and the driving teeth 40 are in a position where they mesh with the passive teeth 61 of the cam 6, functioning as a conventional second setting pawl 402. Figure 3 C shows setting claw 4 on scale plate 3.
The figure shows a state in which the legs 42 are attached to the locking part 30 from the top side with the legs 42 corresponding to the holes 32 and the legs 41 corresponding to the grooves 31. In this case, the legs 41 and 42 are attached to the left and right sides of the locking part 30. The drive teeth 44 and 45 hit the cams 5 and 6.
It is in a position where it meshes with the passive teeth 51 and 61, respectively, and serves as a conventional third setting pawl. Fig. 3 D shows a state in which the setting claw 4 is attached to the locking portion of the scale plate 3 from the top side with the legs 41 corresponding to the holes 32 and the legs 41 corresponding to the grooves 31; 41 and 42 are elastically attached to the two left and right surfaces of the locking part 30, and the drive teeth 40, 44, and 45 are all attached to any of the passive teeth 5.
1 and 61 are not meshed with each other.

Therefore, if you use a setting claw like the one above,
By changing the installation state of one type of setting claw 4, not only the individual switches 8 and 9 but also both switches can be controlled at the same time.
If 96 setting claws are prepared, each switch 8 and 9 can be opened and closed 32 times evenly, or it is possible to open and close only switch 8 48 times and operate the other switch 9 unevenly. This means that if it is a conventional type, each switch 8,
If switch 9 is opened and closed 32 times evenly, 32 of each of three types of setting claws 401, 402, and 403 are prepared, and when only switch 8 is opened and closed 48 times, only the first switching claw 401 is prepared. However, if you prepare 1/3 setting claws, you can use the same control form as the conventional one, making setting operations extremely easy. In addition, by changing the mounting condition of the setting claw, the drive teeth 40, 4
Since the setting pawl can be attached to the scale plate in a state where 4 and 45 do not mesh with either of the passive teeth 51 and 61, the unnecessary locking portion 30 formed on the scale plate 3 can be used as it is for storing the unnecessary setting pawl 4. This eliminates the need to provide a special storage section for unnecessary claws as in the conventional case, and since all 96 switching claws 4 can be attached to the scale plate 3, there is no need to lose switching claws 4. There is no need to worry about losing parts, and even if you lose a part, you can clearly see that it has been lost, so you can properly replace new parts, and if necessary, you can change the installation status of unnecessary claws. By having the time switch, it can be used for setting purposes, and a time switch that is easy to handle and inexpensive can be obtained.

Note that this invention is not limited to the one embodiment of the present invention, and the setting claw 4 and the locking portion 30
may be changed as appropriate as shown in FIGS. 4 to 7 without detracting from the effects of the present invention. Further, in each of the above embodiments, the setting claws are attached by a snap-fitting method, but the setting claws are not limited to this in any way, and a screw-attachment method may also be used, which would have the same results as described above. be.

As described above, according to the present invention, the four setting claws
By arbitrarily selecting the mounting state of the switch, you can set the operating position where all or only one part of the switch is operated and the non-operating position where none of the switches can be operated, so you can open and close multiple switches with one setting claw. All or part of the device can be controlled arbitrarily, making the setting and mounting work easier. In addition, by placing the remaining setting claws in the non-operating position, they can be stored in the scale plate, so there is no need to provide a separate storage space, and you can easily tell if a setting claw is missing by looking at the scale plate. There are effects such as

[Brief explanation of the drawing]

Figure 1 is a schematic structural diagram of a conventional time switch.
Figure 2 A, B, and C are partial sectional views showing the main parts of a conventional setting claw in a state in which it is attached, and Figures 3 A, B, C, and D show a setting claw in an embodiment of the present invention and its mounting state. Each of the partial sectional views and FIGS. 4 to 7 is a partial sectional view showing a setting pawl according to another embodiment of the present invention and the state in which it is attached. In the figure, 3 is a scale plate, 30 is a locking portion, 4 is a setting pawl, and 40, 44, and 45 are drive teeth. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A setting claw is provided that is detachably attached to a locking part provided on the outer periphery of a scale plate that rotates at a constant speed, and has drive teeth that open and close a plurality of switches in accordance with the rotation of the scale plate. In the time switch,
A locking part with a substantially square cross section formed by a groove and a hole, a roughly U-shaped setting claw that is attached to the locking part from above or from the side of the scale plate, one setting claw on each side, A plurality of driving teeth are provided on the other side, and the length from the inner surface of the setting claw to the tip of the tooth is shorter than the length of the hole in the scale plate radial direction, and the mounting state of the setting claw can be arbitrarily selected. As a result, a first operating position in which the drive tooth operates to open and close all of the switches, a second operating position in which the drive tooth operates one switch, and a non-operating position in which none of the switches can be opened or closed are obtained. A time switch that is characterized by the following.