JPS6212614B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a setting 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 type time switch, the first
As shown in the figure, a plurality of setting 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 setting pawls 4 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 setting pawl mounting structure for this type of multi-action time switch, the structure shown in FIG. 1 and FIG. 2 has been proposed. That is, when a large number of locking portions 30 each having a rectangular cross section and consisting of grooves 31 and holes 32 are radially provided on the outer circumference of the scale plate 3 that rotates once a day, and the minimum switching setting time is set to 15 minutes, for example, 96 locking parts 30 are provided, and the setting claw 4 is composed of opposing legs 41, 42 corresponding to the grooves 31 and holes 32 of the scale plate 3, and drive teeth 40, and is set in 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 the conventional device of this kind, the first setting pawl 401 has the driving teeth 40 that mesh only with the passive teeth of the cam 5 as shown in FIG. 2A, and the passive teeth 61 of the cam 6 as shown in FIG. 2B. As shown in FIG.
A third drive tooth 40 having two drive teeth 40 meshing simultaneously with
Three types of setting claws 403 have been used, but since there are many types of setting claws 4, manufacturing costs and management costs increase, resulting in increased costs.Furthermore, the user side has to operate the switch 8, 9 must be selected and installed, which not only makes handling and operation of the time switch complicated, but also if any of the three setting claws 401, 402, 403 is lost, other settings cannot be changed. Since the setting pawl cannot be replaced by a pawl, operation is often hindered, and it is therefore necessary to take extreme care to prevent the setting pawl from becoming dusty.

In addition, in this type of time switch, for example, the minimum switching setting time is 15 on the scale plate 3 that rotates once a day.
For those divided into 32 sets of setting claws 401, 4
Since 02,403 are available, switch 8,
The number of setting claws 401, 402, 403 to be attached differs depending on how many times 9 is opened and closed, and it is necessary to store and store the remaining setting claws 401, 402, 403, but in conventional time switches of this type, The remaining setting claws 401, 402, 4 are attached to a structure near the scale plate 3, such as a case (not shown).
A storage section is specially provided to store 03.
For example, when each switch 8, 9 is to be opened and closed once, one setting claw 401, 402, 403 is attached to the scale plate 3 as shown in the first figure, and the remaining 31 sets of setting claws 401, 402, 403, 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, which makes handling complicated. , 403 has various disadvantages such as easy loss of powder. In addition, since the setting claws 401, 402, 403 are separately attached to two places on the scale plate 3 and the storage part, both setting claws 401, 40
Unless you count the numbers 2,403 one by one, you cannot judge whether or not all setting claws 401, 402, 403 are present.
It also has the disadvantage that it is extremely difficult to detect powder loss.

This invention was made in order to solve the above-mentioned problem, and it is possible to set the first switch and the second switch to the positions where they are opened and closed individually, or the first and second switches with one type of setting claw. The purpose of the present invention is to provide a time switch in which four types of settings (direction of setting claw insertion) can be selected for positions where the switch is simultaneously opened and closed, and a position where the switch is not opened or closed and is both stored and inactive. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be explained below based on the drawings.

That is, FIGS. 3A, 3B, 3C, and 3 are partial sectional views showing the setting claw of the present invention and the state in which it is attached.
A, B, C, and D each indicate different mounting states. In FIG. 3, 3 is a scale plate, and 30 is a groove 31 and a hole 3 provided on the outer periphery of the scale plate 3.
The locking portion has two sides defined by 2 and has a substantially rectangular cross section. 4 is the setting claw,
This setting pawl 4 is made of elastic synthetic resin or the like and is formed into an H-shape, and is formed between the groove 31 of the scale plate 3 and the hole 3.
2, first opposing legs 41 and 42 that are elastically inserted into the locking portion 30, and second opposing legs 43 and 44.
are arranged on both sides of the central piece 45, and one drive tooth 4 is provided on the outside of one of the legs 43, 44, respectively.
7, 48 are provided, and drive teeth 4 are provided on the extension of the central piece 45.
There are 6. The width L from the inside of both legs to the tip of the tooth is smaller than the width L of the hole 32 of the scale plate 3.

Next, the procedure for attaching the setting pawl to the time switch of the present invention constructed as described above will be explained.

That is, in FIG. 3A, the legs 41 of the setting claw 4 are inserted into the grooves 31 of the scale plate 3, the legs 42 are inserted into the holes 32 of the scale plate 3, and the first pair of legs 41, 42 are engaged with the scale plate 3. The mounting state is shown in which the stop portion 30 is elastically inserted, and in this case, the drive tooth 49 is in a position where it meshes with the passive tooth 51 of the cam 5, and the first setting pawl 40 of the above-mentioned conventional configuration is shown.
It plays the same role as 1.

Next, as shown in FIG. 3B, the leg 44 of the setting pawl 4 is
Then, insert the leg 43 into the hole 32 and insert the second pair of legs 43,
44 is elastically inserted into the locking part 30, and in this case, the drive tooth 48 is in a position where it meshes with the passive tooth 61 of the cam 6, unlike the conventional second
It serves the same role as the setting claw 402 of.

Next, as shown in FIG. 3C, the leg 43 of the setting claw 4 is
Then, insert the leg 44 into the hole 32 and insert the second pair of legs 43,
44 is elastically inserted into the locking part 30, and in this case, the drive teeth 46, 47 are in a position where they mesh with the passive teeth 51, 61 of the cams 5, 6,
It serves the same role as the conventional third setting pawl 403 described above. Figure 3 D shows the leg 4 of the setting claw 4.
2 is inserted into the groove 31, the leg 41 is inserted into the hole 32, and the first pair of legs 41, 42 are elastically inserted into the locking part 30. In this case, the drive teeth 46, 4
It goes without saying that teeth 7 and 48 do not mesh with any of the passive teeth 51 and 61.

As explained above, according to the mounting structure of the setting pawl in the time switch of the present invention, it is possible to set the switches 8 and 9 to open and close individually or to open and close both at the same time using one type of setting pawl 4. If the same number of setting claws as before, for example 96, 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 unevenly, for example.
It is also possible to perform the opening/closing operation 48 times and not to operate the other switches 9.

In addition, in the case of the conventional device described above, when each switch 8, 9 is opened and closed 32 times evenly, 32 times is required.
Set the type setting claws 401, 402, 403 respectively.
32 switches must be prepared, and 8 switches must be prepared.
There is a problem that the types and number of setting claws to be prepared differ depending on the control state, such as 96 first setting claws 401 must be prepared when the chisel is opened and closed 48 times. are doing. That is,
The conventional structure has three times as many setting claws as the setting claw mounting structure of the present invention (96 first, second, and third setting claws each).
This method not only has the drawback of requiring a large number of nails to be prepared, but also has the drawback of requiring an extremely large storage space for the remaining nails. Furthermore, according to the setting claw mounting structure of the present invention, the drive teeth 46, 47, 4
Since the setting claw 4 can be attached to the scale plate so that the setting claw 8 does not mesh with any of the passive teeth 51 and 61, the scale plate 3
The unnecessary locking portion 30 generated in the above can be used as it is for storing the unnecessary setting claws 4, and there is no need to provide a special storage section for the unnecessary setting claws as in the conventional case. Set the setting claw 4 on the scale plate 3.
Since the setting claw 4 can be attached to the machine, there is no risk of powder loss from the setting claw 4, and even if powder is lost, it can be clearly seen at a glance that new parts can be procured appropriately. It is effective.

[Brief explanation of the drawing]

Figure 1 is a schematic perspective view of a conventional time switch.
Figure 2 A, B, and C are partial cross-sectional views showing how the conventional setting pawls are attached, and Figures 3 A, B, C, and D are partial cross-sectional views showing how the setting pawls are installed in an embodiment of the present invention. It is. In the drawing, 3 is a scale plate, 30 is a locking part, 4 is a setting claw, 41, 42, 43, 44 are legs, 46, 47,
48 is a drive tooth. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A setting pawl that is removably attached to the outer periphery of a scale plate that rotates at a constant speed and has drive teeth that drive the first and second cams in accordance with the rotation of the scale plate, in which the setting pawl is First and second drive teeth are formed in an H-shape so that they can be attached to and changed from the scale plate, and are provided on the outer side of one of the opposite legs, and the second drive tooth is provided on the outer side of one of the opposite legs. and third drive teeth provided in parallel with each other, and the first and second cams are individually driven by the first and second drive teeth. and a second position, a third position where both cams are simultaneously driven in cooperation with the second and third drive teeth, and a fourth position which is also used for storage and does not drive the cams. A time switch characterized by: