JPS5811668B2 - Counter and its assembly method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in counters, and more particularly to counters and methods for assembling the counters that take into account the ease of assembling the number wheel and pinion.

Conventionally, this type of counter uses a counter frame having a substantially U-shape, and a number wheel shaft and a pinion shaft are horizontally suspended between opposing side plates of the counter frame.

Therefore, in such a counter, when installing a plurality of number wheels and a group of pinions responsible for carrying up the numbers, these are inserted one by one between the opposing side plates for each shaft that is sequentially inserted from the outside of one side plate. The extremely troublesome work of mounting the shafts alternately must be performed.

In particular, during this work, it was necessary to align the displayed numbers on each number wheel before meshing with the pinion, which required considerable skill, which was a major problem in terms of ease of assembly. .

The present invention has been made in view of the above circumstances, and includes forming cut grooves along the axial direction on the circumferential surface of each number wheel corresponding to the carry segments provided on the sides thereof, thereby making the number wheel are successively mounted on the number wheel shaft, and then the carry pinions are fitted into the notched grooves of these number wheels and then mounted on the pinion shaft. The configuration makes it extremely easy to assemble the number wheel and the pinion that meshes with it.
This provides a counter and a method for assembling the counter that can significantly reduce manufacturing costs.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

1 to 5A and 5B show an embodiment of the counter according to the present invention, and this embodiment shows a case where it is applied to an integrating electromagnetic counter used for displaying the number of copies in a copying machine, etc. ing.

In these figures, reference numeral 1 denotes a first frame that is integrally formed of synthetic resin and constitutes one side plate of the counter frame, and 2 denotes a first frame that is formed by bending a metal plate into an abbreviated shape and is also the other side of the counter frame. The second frame constitutes the side plate and the bottom plate, and by combining and integrating the first and second frames 1.degree.2, a counter frame having a substantially U-shape is formed.

In other words, according to this embodiment, by forming the opposing side plates constituting the counter frame as separate frames, it is possible to easily mount the number wheel and the pinion meshed thereto on the shaft that is horizontally suspended between these side plates. It is configured so that it can be done.

To explain this in detail, inside the first frame 1,
A number wheel shaft 3 and a pinion shaft 4 are integrally installed vertically, and holes 5 and 6 are bored in the side plate 2a of the second frame 2 to support the other ends of these shafts 3 and 4. There is.

Of course, the shafts 3 and 4 may be separated and installed inside the first frame 1 made of a metal plate, but the number of parts can be reduced by integrally molding them from synthetic resin as described above. This is advantageous because it allows for

Further, the hole portion 5.6 of the second frame 2 does not necessarily have to be a through hole, but may be a simple blind hole.
Any configuration is sufficient as long as it can support the other ends of both shafts 3 and 4 when combined with the frame 1 of the present invention.

A plurality of number wheels 7 and a pinion 8 interposed between these number wheels 7 to perform a shifting action are respectively mounted on the number wheel shaft 3 and pinion shaft 4 on the first frame 1 side. .

Now, the feature of the present invention is that, as shown in detail in FIG. 2, notched grooves 7a are formed along the axial direction on the circumferential surface of each number wheel 7 into which the teeth of the pinion 8 fit. This notch groove 7a is provided corresponding to a pair of carry segments 7b protruding from one side of the number wheel 7.

That is, the above-mentioned pinion 8 is connected to the gear 7c provided on the other side of the number wheel 7 adjacent to the carry segment 7a.
(See Figure 4), but the meshing points pose a problem in order to display the numbers correctly, and each number wheel 7
The positioning of the pinion 8 and the pinion 8 is important.

For this reason, in the past, positioning was carried out by mounting one numerical wheel 7 and one pinion 8 on each shaft alternately, but the present invention eliminates this troublesome work by adopting the above-mentioned structure. is not necessary and is extremely easy to perform.

That is, a plurality of number wheels 7 are serially mounted on the number wheel shaft 3 vertically installed on the first frame 1, and then long teeth formed on the outer periphery of the pinion 8 are attached to the pinion shaft 4. 8a and the long teeth 8a of the short teeth 8b are sequentially fitted into the notch grooves 7a of each numerical wheel 7, and all the pinions 8a and pinions 8 are properly positioned and attached to their respective shafts. It is mounted on shafts 3 and 4.

In this state, the second frame 1 is
It is preferable to assemble the counter frame by combining the frames 2.

In this embodiment, the shift segment 7b is the number wheel 7.
The cutout Fj7a is provided correspondingly to the display numbers "2" and 13j, and a cutout Fj7a is formed between these display numbers. It is determined by the relationship, that is, the meshing position of the number wheel 7 and the pinion 8, the reading display surface of the number wheel 7, etc., and can be changed as appropriate.

Of course, it goes without saying that each part should be set so as to be located between the numbers displayed on the notch grooves.

Further, in this embodiment, shafts 3 are provided on the upper and lower edges of the first frame 1, as shown in FIG.
, 4 are integrally provided with connecting pieces 9 and 10 that protrude in the same direction.

Fitting grooves 9a are provided at the tips of these connecting pieces 9 and 10.

In 10a, there is a bent piece 11°1 on the second frame 2 side.
By press-fitting 2, both frames 1 and 2 are integrated.

At this time, the protrusions dj 13a, 13b protruding from the side edges of the bottom plate part 2b of the second frame 2 engage with the notch grooves 14a, 14b on the side edges of the first frame 1, and further the lower part of the first frame 1 The protrusion 15 protruding from the connecting piece 10 is also engaged with the cutout groove 16 of the second frame 2.

Further, according to this embodiment, each member constituting the electromagnetic counter is appropriately assembled to the first and second frames 1.2 to form a unit, so that the entire assembly can be easily performed. has been done.

That is, an electromagnet 17 is fixed together with a core 18 inside the bottom plate part 2b of the second frame 2, and an armature 19 has one end thereof connected to the side plate part 2a of the second frame 2 so as to face the core 16. The groove 20 is inserted into the groove 20 formed in the groove 20 .

In the figure, reference numeral 21 denotes a tension spring for restoring the armature, which is hooked between cut and raised pieces 21a and 2Ib provided on the outer surface of the armature 19 and the inner surface of the second frame 2.

Terminals 22a and 22b are press-fitted into the flange 23a of the synthetic resin bobbin 23 constituting the electromagnet 17, and both ends of the coil 24 wound around the bobbin 23 are connected.

On the other hand, inside the first frame 1, the end portion 19a of the armature 19 is engaged at the time of assembly, and rotated by the swing thereof, and a ratchet 7 integrated with the least significant digit wheel 7 is disposed inside the first frame 1.
A support shaft 1a that pivotally supports a pole 25 having a pair of claw portions 25a and 25b that engages with the pole 25b is integrally provided in a protruding manner.

Further, through holes 26a are provided in portions corresponding to the terminals 22a and 22b.

26b is drilled, and the through holes 26a, 26
A concave portion 27 is formed on the outside of the first frame 1 continuously from b.

This concave portion 27 makes it possible to easily solder the external lead wires 28a, 28b connected to the terminals 22a, 22b from the outside of the counter frame, and also strengthens these lead wires 28a, 28b. This part is used to hold the wire in place and prevent it from breaking due to external tensile force.

Note that these lead wires 28a. 28b are notches 29a and 29b provided at the rear end of the first frame 1.
is guided along the inside of the bottom plate part 2b of the second frame 2 through notches 30a and 30b provided at the bending part between the side plate part 2a and the bottom plate part 2b of this second frame 2. pulled outside.

Further, numeral 31 in the figure is a cover having a substantially housing shape and having a counter display window (not shown) corresponding to the reading surface of the number wheel 7.

As explained above, according to the counter according to the present invention,
A notched groove along the axial direction is formed on the circumferential surface of each number wheel in correspondence with the carry pinion provided on the side surface, and the number wheel is serially mounted on the number wheel shaft. All of these pinions are mounted on the pinion shaft while the long teeth of the raising pinion are fitted in, so it is no longer necessary to use the number wheel and pinion alternately, as in the past, while aligning the displayed numbers. It does not require extremely complicated work all at once, and can be expected to greatly improve work efficiency, and positioning is completed at the same time as the pinion is mounted on the pinion shaft by simply fitting the long teeth of the pinion into the notch grooves of the number wheel one after another. This provides an extremely efficient method of assembling a counter.

It goes without saying that the present invention can be applied not only to the electromagnetic counter described in the above-mentioned embodiments but also to various counter devices.

[Brief explanation of the drawing]

The figures show an embodiment in which the counter and its assembly method according to the present invention are applied to an electromagnetic counter. Fig. 1 is an exploded perspective view showing the overall general configuration, and Fig. 2 is an exploded perspective view showing an enlarged view of the main parts. A perspective view, FIG. 3 is a perspective view of main parts showing an assembled state,
Figure 4 is a cross-sectional plan view of only the counter frame, Figure 5
Figures A and B are a side view and a side sectional view. 1...First frame, 2...Second frame, 3...Number wheel shaft, 410. −
1. Pinion shaft, 7... Number wheel, 7a.
...Notch groove, 7b...Carry 1 segment, 8...Pinion.

Claims (1)

[Scope of Claims] 1 A number wheel shaft on which a plurality of number wheels are mounted, and a pinion shaft on which a pinion interposed between the number wheels and performing a shift action is mounted, are supported between opposing side plates. A counter equipped with a counter frame, characterized in that a notched groove into which the teeth of the pinion are fitted is formed along the axial direction on the circumferential surface of each number wheel corresponding to the carry segment provided on the side of the number wheel. counter. 2. A counter frame that supports a number wheel shaft and a pinion shaft between opposing side plates, a plurality of number wheels having cutout grooves along the axial direction of the circumferential surface corresponding to the carry segments provided on the side thereof, and these. A pinion that is interposed between the number wheels to perform a digit feeding action is prepared, and the plurality of number wheels are successively mounted on the number wheel shaft, and then the pinion is inserted into the notched grooves on the circumferential surface of these number wheels. A method for assembling a counter, characterized in that all pinions are mounted on the pinion shaft while fitting the teeth of the counter.