JPH0512844Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a nut-incorporated structure for mounting a counter, and in particular, the structure is simplified, the nut can be reliably prevented from falling off, and the counter can be mounted on a device fixing part such as a panel. It is designed so that it can be firmly fixed to the

[Conventional technology]

When directly fixing a counter to a device fixing part such as a panel using set screws, it is necessary to provide some kind of screw receiving structure on the counter side. A nut is used as the simplest screw receiving structure, and in the case of an electromagnetic counter, as shown in Fig. 4, a screw hole 3 formed in the yoke of the electromagnet 1 is used. If the counter does not have one, a screw hole formed in the counter frame is used.

In FIG. 4, 4 is a resin counter frame, 5 is a panel as a device fixing part, 6 is a set screw for fixing the counter frame 4 to the panel 5, and 7 is a back plate 4a of the counter frame 4.
A screw mounting hole 8 is formed corresponding to the screw hole 3, and a screw insertion hole 8 is formed in the panel 5.

[Problem that the invention attempts to solve]

However, the structure using a nut as a screw receiving structure has a simple structure in which the nut is arranged along the inner surface of the back plate of the counter frame.
It was necessary to hold it by hand to prevent it from moving and screw in the set screw, which was a tedious task. Furthermore, when the counter is removed from the panel, there is a risk that the nut may fall off or be lost from the counter frame, so care must be taken when handling it.

Next, the structure in which the screw hole 3 is provided in the yoke 2 instead of using a nut has the advantage of reducing the number of parts and eliminating the problem of the nut falling off or being lost during installation or removal. Electromagnet 1 that requires additional machining of the screw hole 3, which reduces driving force due to loss of magnetic efficiency due to the screw hole 3
There were some problems, such as restrictions on the installation location.

In addition, for the structure with screw holes in the counter frame, the screw mounting part needs to be made thick for strength, but if this is done, sink marks and strains are likely to occur during molding, and the screw threads are easily crushed, so it is necessary to make it strong. There was a problem that it could not be fixed.

[Means for solving problems]

The nut-embedding structure for mounting a counter according to the present invention was developed to solve the above-mentioned problems all at once, and includes a retaining wall that forms a nut storage space together with the back plate of the counter frame inside the back plate of the counter frame. a nut is fitted into the nut storage space, an elastic stopper piece is provided on the retaining wall to prevent the nut from coming off, and a nut mounting hole is provided in the back plate that communicates with the nut storage space. A set screw is inserted into this hole and screwed into the screw hole of the nut.

[Effect]

In this invention, the nut is fitted into the nut storage space and the stopper piece prevents it from coming off, so it is possible to reliably prevent the nut from falling off or being lost.
Furthermore, the nut is easy to install and remove, and inexpensive commercially available nuts can be used.

〔Example〕

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

FIG. 1 is an exploded perspective view of the main parts when the mounting nut incorporating structure according to the present invention is applied to an electromagnetic counter;
FIG. 2 is a cross-sectional view taken along the line shown in FIG. 3, and FIG. 3 is a cross-sectional view of the counter. Components and portions in the figure that are the same as those in FIG. 4 are designated by the same reference numerals, and their explanations will be omitted. In these figures,
The counter frame 4 is formed of synthetic resin into a box shape with an open front and top surface, and an electromagnet 1 is arranged and fixed in the center of the interior thereof. A core 20 passing through the center hole of the electromagnet 1 is formed integrally with a yoke 2 which is bent into an L shape so as to embrace the front side surface of the coil, and corresponds to the tip of the core 20 and the yoke 2. An armature 21 is disposed on the inner surface of the pole 22.

The pawl 22 is disposed on the inner surface of the right-hand side plate 4b of the counter frame 4 in FIG. With this operation, the double claws 25 formed at the tip of the pawl 22 alternately engage with the ratchet 27 formed integrally on the right side of the lowest digit wheel 26A. The ratchet 27 is configured to rotate step by step together with the least significant digit wheel 26A. Note that such a configuration is already publicly known (e.g. Utility Model Publication No. 57-27080, Utility Model Publication No. 58
12268, etc.), further detailed explanation will be omitted.

A number axle 30 that commonly supports a plurality of number wheels 26, for example, six number wheels 26, is formed by a vertical groove 3 provided on the upper surface of the front end of both side plates 4b and 4c of the counter frame 4.
1 and 32 from above so that the shaft 30
A pinion shaft 34 is also located behind the both side plates 4.
b and 4c, and is disposed parallel to the numerical axle 30. Each number wheel 26 is on the pinion shaft 34.
A plurality of shift pinions 35 are loosely fitted in mesh with each other.

Inside the counter frame 4, on the inside of the back plate 4a, there is a substantially L-shaped plate in plan view, one end of which is joined to the rear end of the inner surface of the right side plate 4b, and the other end attached to the inner surface of the back plate 4a. A retaining wall 41, which forms a nut storage space 40 together with the back plate 4a by being joined, projects integrally with the frame 4. Further, a nut 44 fitted into the nut storage space 40 is provided at the center of the upper surface of the retaining wall 41.
A stopper piece 42 is provided integrally and protrudes to prevent it from coming off. The stopper piece 42 is elastically deformable in the front-rear direction, and a nut locking pawl 45 is integrally provided on the rear surface of its upper end. The upper surface of the nut locking pawl 45 is inclined and forms a guide surface 46 for the nut 44. The nut 44 is a commercially available rectangular metal plate made of iron or the like, and has a screw hole 48 in its center. Then, the nut 44 is fitted into the nut storage space 40 along the guide surface 46. At this time, the stopper piece 42 is elastically deformed forward by the nut 44, and when the nut 44 is completely inserted, it is released from the nut 44, so it elastically returns to its original state, and the nut 44 is tightened by the nut locking pawl 45. This prevents the nuts from falling out of the nut storage space 40.

In the back plate 4a, a screw mounting hole 7 long in the left-right direction is formed corresponding to the screw hole 48 of the nut 44, and a positioning projection 50 for the counter frame 4 is integrally provided.

The counter frame 4, in which the above-mentioned various components are incorporated, is housed in a counter cover 52 formed of synthetic resin into a box shape and having an open rear surface.
It is fixed to the panel 5 with a set screw 6 and a nut 44. A reading window 53 is formed in the front plate 52a of the counter cover 52 for reading the displayed value of each number wheel 26, and a transparent plate 54 is fitted into the window 53. On the other hand, counter cover 5
The two side plates 52b and 52c have locking holes 56a,
56b are formed respectively, and these holes 5
Each side plate 4 of the counter frame 4 is attached to 6a and 56b.
Locking protrusions 57a and 57b protruding from b and 4c are fitted to prevent the counter frame 4 from coming off.

The set screws 6 are passed through the screw insertion holes 8 of the panel 5, inserted into the screw mounting holes 7, and screwed into the screw holes 48 of the nuts 44, thereby firmly fixing the back plate 4a of the counter frame 4 to the panel 5. The panel 5 is provided with fitting holes 59 into which the positioning projections 50 fit.

Since the nut 44 is used in the mounting nut built-in structure having such a configuration, there is no need to provide screw holes in the yoke 2 or the counter frame 4, and therefore the magnetic efficiency of the conventional structure described above is improved. loss, occurrence of sink marks during molding,
This solves problems such as additional machining of screw holes in the counter frame, crushing of the screw holes, and restrictions on the mounting position of the electromagnet 1. In addition, since the nut 44 is prevented from coming off by the stopper piece 42,
The counter frame does not fall off from the counter frame 4, and a commercially available inexpensive one can be used as is. Further, since the nut 44 is formed in a square shape, when the set screw 6 is screwed in, the nut 44 is attached to the set screw 6.
It does not rotate integrally with the panel 5, making it easy to attach it to the panel 5.

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 can be applied to a general push button zero return counter that does not include the electromagnet 1 as it is.

[Effect of idea]

As explained above, the nut-embedding structure for mounting a counter according to the present invention is provided with a holding wall that forms a nut storage space together with the back plate inside the back plate of the counter frame, and on the upper surface of this holding wall. An elastically deformable stopper piece is integrally provided to prevent the nut fitted into the nut storage space from coming off, and the counter frame is fixed to a device fixing part such as a panel by a set screw screwed into the nut. The structure is simple, the nut can be easily and easily assembled, and falling off, loss, etc. can be reliably prevented. Moreover, commercially available inexpensive nuts can be used, and there is no need to perform additional work on the counter frame, yoke, etc., and the nut can be provided at low cost.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of essential parts showing an embodiment of the present invention applied to an electromagnetic counter, and Figure 2 is an exploded perspective view of the main parts.
3 is a cross-sectional view of the counter, and FIG. 4 is a perspective view showing a conventional counter mounting structure. DESCRIPTION OF SYMBOLS 1... Electromagnet, 2... Yoke, 3... Screw mounting hole, 4... Counter frame, 4a... Back plate, 5... Panel, 6... Set screw, 40... Nut storage space, 41... ...Retaining wall, 42...Stopper piece, 44...Nut, 48...Screw hole.

Claims (1)

[Scope of utility model registration request] In a counter that is fixed to a device fixing part such as a panel with a set screw and a nut, a holding wall is provided inside the back plate of the counter frame to form a nut storage space for storing the nut together with the back plate, and this A stopper piece having elasticity that prevents the nut from coming off is integrally provided on the wall, and a screw mounting hole that communicates with the nut storage space and into which the set screw is inserted is provided on the back plate, A nut-incorporated structure for mounting a counter, characterized in that a screw is screwed into a screw hole of the nut.