JPS6318788B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a counter in which a number wheel and a pinion can be assembled quickly and easily, and erroneous assembly can be prevented.

Traditionally, counters that count and display the number of revolutions of various devices have been assembled by alternately fitting the number wheel and pinion to the number axle and pinion shaft, which are each supported by a frame. , the work efficiency is extremely poor, which is one of the causes of increased costs.

The present invention has been made in view of such conventional disadvantages, and a predetermined number of number wheels and pinions are placed on the number wheel mounting section and pinion mounting section provided on the inner surface of the frame, respectively. With an extremely simple configuration in which the numerical axle and pinion shaft are inserted into the numerical wheel and pinion from the outside of the frame at once, we have created a counter that greatly improves work efficiency and reduces manufacturing costs. This is what we provide.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Fig. 1 is a partially cutaway exploded perspective view from below showing an embodiment of the present invention applied to an electromagnetic counter, Fig. 2 is a side sectional view of the counter, and Fig. 3 is a main part of the counter. FIG. In these figures, an electromagnetic counter 1, which is designated as a whole by reference numeral 1, has a cover 2 integrally formed of synthetic resin.
and a frame 3, in which a number wheel, a reset mechanism, an electromagnet, etc., which will be described later, are housed, and the frame 3 is fitted and housed in the cover 2.

The cover 2 is formed into a box shape that is long in the front and back direction, and a display window 4 is formed in the center of the front surface thereof, and a transparent plate 5 made of acrylic or the like is fitted and fixed thereto.
Further, a push button insertion hole 8 is formed below the display window 4, through which a push button 7 protruding from the center of the front end surface of the slide lever 6 passes through and projects to the outside. Guide protrusions 9A and 9B are provided in a protruding manner. On the other hand, the rear surface of the cover 2 is open, and the frame 3 is fitted through this open part 10, and projections 1 are provided on both sides of the rear end.
1 and 12 (12 is not shown) are fitted into fitting holes 13 and 14 formed on both sides of the rear end of the cover 2, respectively, thereby integrally attaching the frame 3 to the cover 2. This prevents the cover from coming off from the cover 2.

The frame 3 has a box shape large enough to fit into the cover 2, and its front, upper rear end, and lower front end are open. Further, as shown in FIG. 1, rectangular recesses 17 and 18 are formed on the outer surfaces of the front end portions of the pair of left and right side walls 15 and 16 constituting the frame 3, respectively. Both side walls 19 and 20 of the slide lever 6 are fitted into the frame 3 from below. In this case, the length of the recesses 17 and 18 in the front-rear direction is formed to be sufficiently longer than the side walls 19 and 20, allowing the slide lever 6 to move in the front-rear direction.

Thin wall portions 21 constituting each of the recesses 17 and 18;
Small holes 23 and 24 are coaxially formed approximately in the center of 22, and longitudinally long elongated holes 25 and 26 located behind these small holes 23 and 24 are also coaxially formed, and on the thin wall portion 21 side. is located between the small hole 23 and the long hole 25, and has a rectangular opening 27 that is long in the vertical direction. The pair of small holes 23, 2
4 rotatably supports each shaft end of the numerical axle 28, and this numerical axle 28 has a plurality of shafts, for example, 4.
Number wheels 29 are rotatably supported. A pin gear 30 is formed on one side of each number wheel 29 (excluding the lowest digit number wheel), and a segment gear 32 and a heart cam 33 (see FIG. 3) are formed on the other side. Further, on the circumferential surface of each number wheel 29, numbers from "0" to "9" are displayed evenly distributed in the circumferential direction. A star wheel 3 is placed on one side of the number wheel 29a of the lowest digit.
4 are integrally formed.

On the other hand, a pinion shaft 35 is provided in the long holes 25 and 26.
Both ends are inserted so as to be movable in the front-back direction. The pinion shaft 35 is interposed between each numerical wheel 29, and the segment gears 3 of these numerical wheels 29 are usually connected to each other.
Three pinions 36 are rotatably supported to move the number wheel 29 by meshing with the number wheel 2 and the pin gear 30.

An elastic piece 37 is vertically provided on one side of the upper bottom surface of the frame 3, and this elastic piece 37 presses each number wheel 29 toward the thin wall portion 21, thereby regulating the side play of the number wheel 29. In addition, a first
As shown in the figure and FIGS. 4a and 4b, an opening 38 is formed and the front and rear edges of this opening 38 are inclined to form a number wheel mounting section 39.
This numeral wheel mounting section 39 holds the numeral wheel 29 in the frame 3.
By turning the frame 3 over, the four number wheels 29 are placed.In this state, the number axle 28 is inserted from the outside of the frame 3 into the small hole 24, and each number is inserted into the frame 3. All the numbered wheels 29 are mounted on the numbered axle 28 at once by commonly inserting them into the shaft holes of the wheels 29 and further inserting them into the small holes 23 so that their tips protrude. Further, a pinion mounting section 40 is formed continuously behind the number wheel mounting section 39, and a pinion alignment block 41 is continuously formed on the pinion mounting section 40.
(matching part) is installed vertically.

The pinion mounting section 40, like the number wheel mounting section 39, is used when the pinion 36 is assembled into the frame 3, and is formed flat as shown in FIG. It is partitioned off. Each pinion mounting part 40a-40 partitioned off by these partition walls 42a-42d
C accommodates the main body portion 36b of the pinion 36, excluding the boss portion 36a, to prevent side play. Among the four partition walls 42a to 42d,
The height of the three partition walls 42a to 42c on which the boss portion 36a of each pinion 36 is placed when assembled is the fourth height.
As shown in FIG. c, they are all slightly different, and the partition walls 42a and 42d are formed at substantially the same height. Therefore, the outer diameter of the boss portion 36a of each pinion 36 differs depending on the height of the partition walls 42a to 42c. This is pinion 3
The pinion 3 is formed by long teeth 44 and short teeth 45 alternately formed on the outer peripheral surface of the main body 36b of 6.
This is to prevent erroneous assembly in consideration of the directionality of No. 6, and the boss portion corresponding to a partition wall with a higher height is set to have a smaller outer diameter. However, each pinion 3 placed on each pinion placement part 40a to 40c
Since the main body parts 36b to 36c of No. 6 are all formed in the same manner, their axes coincide with each other. Therefore, by inserting the pinion shaft 35 from the outside of the frame, all the pinions 36 are mounted on the pinion shaft 35 at once, similar to the number wheel 29.

Note that if the directionality of the pinion 36 is not taken into account, the heights of the partition walls 42a to 42d may all be set to be the same. In this case, since the outer diameters of the respective boss portions 36a are the same, all the pinions 36 can be used in common, and manufacturing is easy. Further, if the shaft end of the pinion shaft 35 (same as the numerical axle 28) is chamfered, insertion into the pinion 36 is easy. Furthermore, the number wheel mounting section 39 and pinion mounting section 40 are used when assembling the number wheel 29 and pinion 36, and when used as a product, the frame 3 is inverted so that it faces downward as shown in the original figure 1. If the dimensions of the small holes 23, 24 and long holes 25, 26 or the shaft holes of the number wheel 29 and pinion 36 are set somewhat larger, the number axle 28 and pinion shaft 35 will be lowered. ,
Since it rotates smoothly without contacting the placement parts 39 and 40, it does not interfere with the counting operation.

The pinion alignment block 41 is provided vertically so as to be orthogonal to the pinion mounting portion 40, and is partitioned for each pinion 36 by vertical partition walls 50a to 50d. These vertical partition walls 50a-5
Three grooves 51a to 51c partitioned by 0d
is shallow, and each of the pinion mounting portions 40a to 40
By setting the width of the vertical partition walls 50a to 50c larger than that of the partition walls 42a to 42c as shown in FIG. It is narrowly formed. These grooves 51a to 51c have a groove width that allows the short teeth 45 provided on the outer periphery of the main body portion 36b of the pinion 36 to fit therein. Therefore, by the reset operation described later, the pinion 36
When the pinions 36 are shifted to the left and separated from the number wheel 29 all at once as shown by the chain line in FIG. One end of the two long teeth 44 located on both sides connects each vertical partition wall 50a to 50c.
, thereby aligning each pinion 36.

A well-known electromagnet 60 is attached to the rear end of the frame 3.
are arranged from above. This electromagnet 60
is composed of an excitation coil 61, a yoke 62, and a core 63, and a pair of left and right terminals 64, 65 thereof protrude outside from the rear end surface of the frame 3. An armature 66 is disposed in front of the core 63 and is attracted when the electromagnet 60 is excited. This armature 66 can be freely swung back and forth by fitting a pair of upper and lower projections 67 and 68 protruding from one side end into engagement holes 69 and 70 formed in the thin part 22 of the frame 3. A pole 71 (feeding member) is operatively connected to the other end. This connection structure is constructed by fitting and engaging a protrusion 72 provided at the other end of the armature 66 into a mounting portion 73 consisting of an insertion groove provided at the rear end of the pole 71. Further, the pole 71 is connected to the thin wall portion 2.
It is rotatably supported by a pole shaft 74 that is rotatably supported between 1 and 22, and has double claws 75A and 75B at the tip thereof that alternately mesh with the star wheel 34 of the lowest digit number wheel 29a. are integrated. The pinion shaft 35 is located in the center of the pole 71.
A hole 76 is formed therethrough, and a spring locking portion 78 for locking one end of a spring 77 is formed at the lower edge of the rear end. This spring 77 always urges the pole 71 clockwise in FIG. As a result, the lower double claws 75B are normally engaged with the teeth of the star wheel 34. An engaging portion 80 consisting of a protrusion protruding from the opening 27 of the frame 3 into the recess 71 is provided above the front end of the outer surface of the pawl 71, and when the engaging portion 80 is reset, the slide lever 6 presses downward, the pole 7
1 is rotated counterclockwise by a small angle against the spring 77, and the engagement between the star wheel 34 and the double claws 75B is temporarily released.

As described above, the slide lever 6 is formed of synthetic resin or the like into a substantially shape, and has a pair of left and right side walls 19, 20, and these side walls 19, 20.
The push button 7 is integrally protruded from the center of the tip of the connecting portion 81. The pair of side walls 19 and 20 are formed with longitudinally elongated holes 82 through which the numerical axle 28 passes, and holding portions 83 and 84 that elastically support the pinion shaft 35 in a longitudinally movable manner, respectively. It is formed. These holding parts 83,
Reference numeral 84 is composed of a guide hole 85 and a pair of upper and lower elastic clamping pieces 86A, 86B that protrude rearward and forward from the lower end of the front and rear surfaces of the guide hole 85, and the tip of each elastic clamping piece 86A, 86B Protrusions 87 and 88 facing each other are integrally provided on the portion. The shaft end of the pinion shaft 35 is
As shown in the figure, the tip of the upper elastic clamping piece 86A, the intermediate part of the lower elastic clamping piece 86B, that is, the rear part of the protrusion 88, and the rear surface 9 of the guide hole 85.
0 and is supported at three points, and when the slide lever 6 moves rearward due to the pressing operation of the push button 7, the elongated hole 2
It moves integrally with the lever 6 within the range of 5 and 26.
In this case, the movement stroke of the slide lever 6 is longer than the length of the elongated holes 25, 26, so when the pinion shaft 35 reaches the rear end edge of the elongated holes 25, 26 and stops, the slide lever 6 is During the movement, the elastic clamping pieces 86A and 86B are pushed apart by the pinion shaft 35, and the distal end surface of the elastic clamping piece 86B shown in FIG. pinion shaft 3
5 is located. The slide lever 6 has one end inserted and locked into a protrusion 92 that protrudes from the center of the rear end surface of the connecting portion 81, and the other end that protrudes from a protrusion 94 that protrudes from the center of an open end surface 93 that opens below the frame 3. The counter is always biased forward by a spring 95 inserted and locked in the counter (see FIG. 2). Furthermore, an engaging portion 97 is formed on the upper surface of the guide hole 85 formed in the side wall 20, corresponding to the engaging portion 80 of the pole 71. This engaging portion 97 is formed in a step shape so that the front end is one step lower than the rear end.
A slanted cam surface 98 is provided at the boundary between the two, and the engaging portion 80 is normally located on the rear side of the cam surface 98, as shown in FIG. On the outer surface of the lower end of the side walls 19, 20 and on the lower surface of both ends of the connecting portion 81, that is, on the outer surface of the corner of the slide lever 6, a thin groove-shaped groove 100 that is long in the front and back direction is formed. 100 prevents deformation of the slide lever 6 during molding. That is, in the case of a molded article having an opening, the corners are subject to large shrinkage, which tends to cause inconveniences such as the side walls collapsing inward or opening after molding. Therefore, by providing a recess 100 at the corner of the slide lever 6, the above-mentioned problem, that is, deformation due to contraction can be prevented. In addition, as shown in FIG. 3, pressing pieces 101 are protruded from the upper surface of the front end of the connecting portion 81 in correspondence with the heart cams 33 of each number wheel 29. This pressing piece 1
01 is formed into a plate shape, and the plate thickness becomes thinner toward the tip, and this tip faces the rear of the display window 4, thereby forming a partition line between the displayed numbers.

Note that 102 and 103 shown in FIG. 1 are guide plates for the slide lever 6.

In such a configuration, when a signal current is supplied to the excitation coil 61 of the electromagnet 60, the core 63 is excited, thereby attracting the armature 66 against the spring 77. When the armature 66 is attracted, the pawl 71 rotates counterclockwise in FIG.
A engages with the teeth of the star wheel 34 and rotates the star wheel 34 by half a tooth. Next, as the electromagnet 60 is demagnetized, the pole 71 returns to rotation due to the force of the spring 77, the upper double claw 75A comes off from the star wheel 34, and the lower double claw 75B engages with the star wheel 34 again. Rotate by half a tooth. That is, one pulse signal applied to the electromagnet 60 causes the pole 71 to move back and forth once, thereby causing the lowest digit number wheel 29 to move back and forth once.
Turn a by 1/10, and the counter will display the count. Note that the rotation of the lowest digit number wheel 29a is sequentially rotated via the pinion 36 to the higher digit number wheel 29b,
29c... is transmitted.

Next, when the push button 7 is pressed against the spring 95 and the slide lever 6 is moved backward, the pinion shaft 3
5 moves together to move the pinion 36 to the number wheel 29.
At the same time, the pressing piece 101
As shown in FIG. 5, the heart cam 33 of each number wheel 29 is pressed to return all the number wheels 29 to zero at once. In such a reset operation, when the reset lever 6 moves, the cam surface 98 constituting the engaging part 97 presses the engaging part 80 of the pawl 71 downward, so that the pawl 71 has a pressing piece 101 that is set to the lowest digit. Before pressing the heart cam 33 of the wheel 29a, the wheel 29a is rotated counterclockwise by a small angle against the spring 77 as shown in FIG. to be released. Therefore, the lowest digit number wheel 29a returns to rotation independently of the pawl 71, and the pawl 71 does not act on the star wheel 34 as a load when the push button 7 is pressed. Therefore, you can easily reset it and reset the lowest digit number car 2.
9a can be reliably returned to zero.

Note that when the external force is removed from the push button 7, the slide lever 6 moves forward and returns due to the force of the spring 95, and the pinion shaft 35 also returns accordingly.
Counter 1 returns to a countable state.

Thus, in the counter according to the present invention, the number wheel mounting portion 39 and the pinion mounting portion 40 are provided on the inner bottom surface of the frame 3, and by turning back the frame 3, the number wheel 29 is placed with these mounting portions 39 and 40 facing upward. and pinion 36, and connect the number axle 28 and pinion shaft 35 from the outside of the frame 3 to the number wheel 2.
Since the number wheel 29 and the pinion 36 are inserted into the shaft holes of the number wheel 29 and the pinion 36, there is no need to alternately fit the number wheel 29 and the pinion 36 one by one onto the number axle 28 and the pinion shaft 35, thereby facilitating the assembly work. Can be done. Further, by changing the height of the partition walls 42a to 42c provided on the pinion mounting portion 40 and partitioning each pinion 36, and correspondingly changing the outer diameter of the boss portion 36a of the pinion 36, Reverse integration may be prevented.

Although the above embodiment has been described with reference to the case where it is applied to an electromagnetic counter, the present invention is not limited to this, and it goes without saying that the present invention can be directly applied to a general mechanical counter as long as it has double claws. be.

As explained above, in the counter according to the present invention, the numeral axle and pinion shaft can be inserted through all the numeral wheels and all the pinions, and can be pivoted all at once, so the work of assembling it into the frame is extremely simple. This can reduce manufacturing costs.
In addition, the structure is simplified and reverse installation of the pinion can be prevented, which is very effective.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view from below showing an embodiment in which the present invention is applied to an electromagnetic counter;
Fig. 2 is a side sectional view of the counter, Fig. 3 is a side sectional view of the main part of the counter, Fig. 4 a to c are views of the main part of the frame viewed from below, - line sectional view and - line sectional view. FIG. 5 is a diagram for explaining the operation of the present invention. 1... Electromagnetic counter, 3... Frame, 28...
...Number axle, 29...Number wheel, 35...Pinion shaft, 36...Pinion, 36a...Boss part, 39
...Number car mounting part, 40...Pinion mounting part, 4
1...Pinion matching block (matching part), 42
a~42d...Partition wall.

Claims (1)

[Claims] 1. A plurality of number wheels 29 rotatably supported on a number axle 28 supported on the frame 3 of the counter.
, a plurality of pinions 36 which are arranged between the number wheels rotatably supported by a pinion shaft 35 to perform a digit feeding operation of the number wheels; A number wheel mounting portion 39 on which the number wheel is placed; a matching portion 41 provided on the inner surface of the frame that aligns the pinions by colliding with each other at the time of reset; and between the number wheel mounting portion and the matching portion. a pinion mounting section 4 provided on the pinion mounting section 4 on which the pinion is mounted during assembly
A counter characterized by comprising: 0. 2 A plurality of number wheels 29 rotatably supported on a number axle 28 supported on the counter frame 3
, a plurality of pinions 36 which are rotatably supported on a pinion shaft 35 and are interposed between the number wheels to perform a digit-feeding operation of the number wheels; The number wheel mounting section 39 on which the numbers are placed, the matching section 41 provided on the inner surface of the frame to align the pinions by abutting against each other during reset, and the matching section 41 provided continuously to this matching section to align the pinions during assembly. It is equipped with a pinion mounting part 40 on which a pinion is mounted, and a partition wall 42 provided on this pinion mounting part and located between each pinion, and the height of the partition wall is made different. A counter characterized in that the outer diameter of the boss portion 36a of each pinion is changed depending on the size of the pinion.