JPS6131577B2 - - 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 individually controls opening and closing of a plurality of switches at a plurality of set times.

In general, multi-acting type time switches, especially those that individually control the opening and closing of multiple circuits (for example, three circuits), are rotated at a constant speed by a synchronous motor 1 via a transmission wheel train 2, once a day, as shown in Fig. 1. A plurality of switching pawls 4 are attached to the rotating scale plate 3, and driven teeth 51 connected to the cam 5 and passive teeth 61 connected to the cam 6 are connected to the cam 5 by the driving teeth 40 provided on the switching pawls 4. , by providing passive teeth 71 connected to the cam 7, the cams 5, 6, and 7 are individually rotated to open and close the switches 8, 9, and 10 individually.

Therefore, the switching pawl mounting structure of this type of conventional multi-action time switch is shown in Figs. 1 and 2.
The structures shown in Figures A, B, and C have 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 periphery of the scale plate 3 that rotates once a day, and the minimum switching setting time is set to 15 minutes, for example. is provided with 96 locking parts 30, and the switching claw 4 is connected to the groove 31 and hole 32 of the scale plate 3.
The leg parts 41 and 42 of the switching pawl 4 are inserted into the groove 31 and the hole 32 of the scale plate 3, respectively, and the switching pawl 4 is inserted into the locking part 30. The switching claw 4 is attached to the scale plate 3 by snapping the legs 41 and 42 of the switch.

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 of the cam 5, and as shown in FIG. 2B, the drive teeth that mesh only with the passive teeth 61 of the cam 6. a second switching pawl 402 having 40;
As shown in FIG. 2C, three types of switching pawls have been used, including a third switching pawl 403 having a driving tooth 40 that meshes only with the passive teeth 71 of the cam 7, but since there are many types of switching pawls 4, There was a cost increase due to increased manufacturing and administrative costs. Along with this cost increase, the switch 8, 9 to be operated on the user side,
Since the switching claws must be selected and installed according to the time switch, handling and operation of the time switch is complicated, and the three types of switching claws 401, 402,
Even if you lose any of 03, you cannot replace it with another switching claw, which often causes problems in operation.
Therefore, it was necessary to be extremely careful about losing the switching claw.

In addition, in this type of time switch, for example, the minimum switching setting time is set using the scale plate 3 that rotates once a day.
For 15 minutes, 32 sets of switching claws 40
1,402,403 will be prepared,
The number of switching claws 401, 402, 403 to be installed differs depending on how many times the switches 8, 9, 10 are opened and closed, and the remaining switching claws 401, 402, 40
It is necessary to store and store 3. Regarding storage and storage, in conventional time switches of this type, a storage section for storing the remaining switching claws 401, 402, 403 was specially provided in a structure near the scale plate 3, such as a case. For example, when each switch 8, 9, 10 is to be opened and closed once, two of each of the switching claws 401, 402, 403 are mounted on the scale plate 3, and the remaining 30 sets of switching claws 401, 403 are mounted on the scale plate 3.
402 and 403 must be stored,
Not only does it require a large space to store the remaining nails, but it is also complicated to handle, as it has to be removed from the scale plate 3 and stored in a separate storage section.
This has the disadvantage that the switching claws 401, 402, 403 are easily lost.

Furthermore, there are switching claws 40 in two places: the scale plate 3 and the storage part.
1,402,403 are installed separately, so you have to count the number of both switching claws 401, 402, 403 one by one.
03 are all in place, and it is difficult to discover if the switching claws 401, 402, 403 are missing.

This invention was made in view of these points, and it is possible to control any of the switches 8, 9, and 10 with one type of switching claw, and a special storage part is provided to store the remaining switching claws. This provides a new switching pawl device structure that is unnecessary.

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 3 is a partial cross-sectional view showing the main part of the switching pawl mounting structure of the present invention, with A, B, C, and D representing different mounting states, respectively.

3 is a scale plate, and 30 is a lock having a substantially square cross section with two sides formed by a groove 31 and a hole 32 provided on the outer periphery of the scale plate 3. Reference numeral 4 denotes a switching claw, which is formed in a U-shape from an elastic synthetic resin or a metal plate, and has opposing legs 4.
1 or 42, for example, leg 41
A first driving tooth 44 is provided outward from the center of the connecting side 48, and a second driving tooth 40 is provided outward from one end of the connecting side 48. By forming the switching pawl 4 in a U-shape as described above, the switching pawl 4 can be attached to the locking portion 30 either on the top side or the side side of the scale plate 3. Furthermore, the leg portion 4
The width 1 from the inside of the drive tooth 44 to the tip of the drive tooth 44 is smaller than the width L of the hole 32 of the scale plate 3.

Next, a procedure for mounting the switching claw in the switching claw mounting structure of the present invention constructed as described above will be explained.

FIG. 3A shows a state in which the switching claw 4 is attached to the locking portion 30 of the scale plate 3 from the side with the leg portion 41 facing upward and the leg portion 42 facing downward.
1 and 42 snap onto the upper and lower surfaces of the locking portion 30, so that the driving teeth 40 are in a position where they mesh with the passive teeth 51 of the cam 5, and serve as the conventional first switching pawl 401 shown in FIG.

In FIG. 3B, the switching claw 4 is connected to the locking part 30 of the scale plate 3. From the top side, the leg part 42 is inserted into the hole 32, and the leg part 41 is inserted into the groove 3.
In this case, the legs 41 and 42 are in contact with the left and right sides of the locking part 30, and the driving teeth 44 are in a position where they mesh with the passive teeth 61 of the cam 6. 2, the conventional second switching claw 40
It plays the role of 2.

FIG. 3C shows a state in which the switching claw 4 is attached to the locking portion 30 of the scale plate 3 from the side with the leg portion 42 facing upward and the leg portion 41 facing downward.
1 and 42 snap onto the upper and lower surfaces of the locking portion 30, and the drive tooth 40 is therefore in a position where it meshes with the passive tooth 71 of the cam 7, functioning as the conventional third switching pawl 403 in FIG. .

FIG. 3 D shows how to connect the switching claw 4 to the locking part 30 of the scale plate 3 from the top side, inserting the leg part 41 into the hole 32 and inserting the leg part 42 into the groove 3.
In this case, the leg parts 41 and 42 are attached to the left and right sides of the locking part 30, and therefore the drive teeth 40 and 44 are both attached to either of the passive teeth 51 and 61. , 71 do not mesh well.

As described above, according to the switching claw mounting structure of the present invention, one type of switching claw 4 can be used to connect the switches 8, 9, 10.
Since all of them can be controlled, if the same number of switching claws as before, for example 96, are prepared, each switch 8, 9, 10 can be operated 32 times evenly, or unevenly, for example. Switch 8 only 96
It is also possible to cause the switch to rotate and not to operate the other switches 9 and 10.

On the other hand, with the conventional one, when each switch 8, 9, 10 is operated 32 times, the
Each type of switching claw 401, 402, 403
The number of switching claws that should be prepared depending on the type of control is as follows: 32 switching claws must be prepared, and if only the switch 8 is to be rotated 96 times, only 96 first switching claws 401 must be prepared. They have different types and numbers of defects. That is, it is necessary to prepare three times as many switching claws as the switching claw mounting structure of the present invention (96 each of the first, second, and third switching claws), and the storage space for the remaining switching claws is also limited. This required something extremely wide. Further, according to the switching pawl mounting structure of the present invention, the driving teeth 40, 44 are replaced by the passive teeth 51, 61, 7.
Since the switching claw 4 can be attached to the scale plate so as not to mesh with any of the switching claws 1, the unnecessary locking portion 30 formed on the scale plate 3 can be used as it is for storing the unnecessary switching claw 4.

Therefore, there is no need to provide a special storage section for unnecessary claws as in the conventional case, and since all 96 switching claws 4 can be mounted on the scale plate 3, there is no need to worry about losing the switching claws 4. There is no need to worry about it, and even if you lose it, you can clearly see that it has been lost, so you can properly replace it with new parts.

The present invention is not limited to the above-mentioned embodiment, but the same effects can be obtained even if the shape of the locking portion 40 or the switching claw 4 is changed as shown in FIGS. 4 to 7.

[Brief explanation of the drawing]

Figure 1 is a schematic structural diagram of a conventional time switch.
FIGS. 2A, 2B, and 2C are partial cross-sectional views showing essential parts of a conventional switching pawl device structure. 3A, 3B, 3C, and 3D are partial cross-sectional views showing essential parts of the switching pawl mounting structure according to an embodiment of the present invention in different mounting states. 4 to 7 are partial cross-sectional views showing essential parts of switching pawl mounting structures according to different embodiments of the present invention. In the figure, 3 is a scale plate, 30 is a locking part, 31 is a groove,
32 is a hole, 4 is a switching claw, 41 and 42 are legs, 43
40 and 44 are driving teeth, 5, 6, and 7 are cams, 51, 61, and 71 are passive teeth, and 8, 9, and 10 are switches. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A switching pawl locking portion provided on the outer periphery of a scale plate that rotates at a constant speed, corresponding to the scale of the scale plate, and three positions, upper, middle, and lower, spaced apart in the direction of the rotation axis of the scale plate. A switching pawl that snaps onto the locking portion such that the driving tooth protrudes from the above, a first passive tooth that engages with and rotates the driving tooth at the upper position of the switching pawl, and a driving tooth at an intermediate position. a second passive tooth that engages with and rotates; a third passive tooth that engages and rotates with the lower drive tooth; The first, second, and third cams are individually connected and rotated concentrically in parallel with each of the passive teeth, and the rotation of the respective cams causes the first, second, and In a multi-action time switch configured to open and close the third switch individually, the switching pawl is approximately U-shaped, and the drive teeth are provided on two of the three sides of the U-shape. One piece is provided one by one, and is formed so that it can be turned over and landed on the locking part of the scale plate, and the locking part of the scale plate has a switching claw formed as described above connected to the upper surface side of the scale plate. By forming the switching claw so that it can be hit from two directions on the side surface, and flipping the one type of switching claw upside down or changing the landing direction in the two directions and hitting the locking part, the switching claw can be The drive tooth can be selectively set to change among three states: a state in which the drive tooth engages with the first passive tooth, a state in which the drive tooth engages with the second passive tooth, and a state in which the drive tooth engages with the third passive tooth. A time switch that is characterized by: 2. By selecting one of the two directions and selecting the front and back sides of the switching pawl and snapping it onto the locking part, the driving teeth of the switching pawl engage with the first passive teeth and the first It can be selected from four states: a state in which it engages with the second passive tooth, a state in which it engages with the third passive tooth, and a state in which it does not engage with any of the first, second, and third passive teeth. A time switch according to claim 1, characterized in that the time switch is configured as follows.