JP5213612B2 - Tangential mechanism with prevention of misoperation - Google Patents

Description

  The present invention relates to a tangential mechanism for connecting electrical wiring, and more particularly to a tangential mechanism in which first to third nuts are screwed onto bolts.

  In the field of railway signals, tangential mechanisms that connect electrical wiring are called tangents, and the configuration is defined in “former JRS22821-1E-14AR6C Japan National Railway Standard tangents” and “former JIS E 3104 railway signal tangents”. It is used as a connection terminal (for example, refer to Patent Document 1) of a railroad crossing control protector, a junction box relay terminal, and the like. The main part is a bolt in which the first to third nuts are screwed in order. When, for example, an M6 hexagonal bolt is adopted for the bolt, a hexagonal nut having a nominal thread diameter of M6 is adopted for the first to third nuts. The The 1st to 3rd nuts are not only aligned with the nominal diameter of the screw related to the inner peripheral shape and the hexagonal shape related to the outer peripheral shape, but the hexagonal outer peripheral shape is also unified to the same flat diameter (double width). In addition, tools for attaching and detaching operations can be shared.

  A detailed configuration of such a tangent element 40 (a tangential mechanism without an erroneous operation preventing function) will be described with reference to the drawings. 4A is a side view of the tangent 40 attached to the plate body 50, FIG. 4B is a view taken along the line AA of the end face of the first nut 41, and FIG. 4C is the end face of the second nut 42. BB arrow view, (d) is a front view of the spanner 60 which is a tool, (e) is a BB arrow view when the spanner 60 is hung on the second nut 42, and (f) is the spanner 60 on the first nut 41. FIG.

  The tangential element 40 is illustrated as being attached to the plate body 50, for example. However, the tangential element 40 is formed of a hexagonal bolt, the shaft portion is inserted into the through hole 51 of the plate body 50, the head portion comes into contact with one surface of the plate body 50, and the screw portion A bolt 44 projecting from the other surface of the plate body 50, a first nut 41 which is a hexagon nut and is first screwed into a threaded portion of the bolt 44 to fix the bolt 44 to the plate body 50, and also a hexagon nut. Secondly, a second nut 42 that is screwed into the threaded portion of the bolt 44 and sandwiches an electrical wiring (not shown), and is also made of a hexagonal nut, and thirdly screwed into the threaded portion of the bolt 44 to remove the second nut 42. And a third nut 43 for preventing this.

  In this tangential element 40, a flat washer 45 and a disc spring washer 45 a are disposed between the plate body 50 and the first nut 41, and two flat washers 46 are disposed between the first nut 41 and the second nut 42. The spring washer 47 is disposed between the second nut 42 and the third nut 43. The flat washer 45 and the disc spring washer 45a are fastened and fixed to the bolt 44 by a first nut 41 after loose fitting. The flat washer 46 is fastened and fixed to the bolt 44 after the first nut 41 is fixed by the second nut 42 after being loosely fitted. At that time, an electric wiring (not shown) is inserted between the two flat washers 46. After that, the second nut 42 is tightened to fix and hold the electric wiring. The spring washer 47 is fastened and fixed to the bolt 44 after the second nut 42 is fixed by tightening the third nut 43 after the loose fitting.

  The outer peripheral shape of the first to third nuts 41 to 43 is whether or not the spanner 60, which is a typical example of a tool suitable for the attaching / detaching operation, can be used, apart from a slight difference such as whether the chamfering is double-sided or single-sided. It can be said that there is no difference from the main viewpoint. The case of the nominal screw diameter M6 will be described as a specific example. The first nut 41 has a hexagonal outer shape and a flat diameter (minimum outer diameter) C of 12 mm and diagonal (maximum) according to the above-mentioned old JRS and old JIS standards. The outer diameter (D) is about 13.9 mm, the second nut 42 has a hexagonal outer periphery, a flat diameter (minimum outer diameter) E of 12 mm, and a diagonal (maximum outer diameter) F of about 13.9 mm. The third nut 43 is not limited to a hexagonal outer peripheral shape, but also has the same flat diameter and diagonal.

  In this case, a wrench 60 having a width G of the opening 61 as an action portion of about 12 mm is used as the attaching / detaching operation tool. The opening width G is slightly wider than the flat diameter (minimum outer diameter) C of the first nut 41 and the flat diameter (minimum outer diameter) E of the second nut 42, and the diagonal (maximum outer diameter) D of the first nut 41. And the diagonal (maximum outer diameter) F of the second nut 42 is sufficiently narrower. Therefore, the spanner 60 can be used not only for turning the second nut 42 (see FIG. 4E), but also for turning the first nut 41 (FIG. 4F). )reference).

  Further, although not conforming to the above-mentioned old standard, a terminal block having a tangential mechanism of another structure is also known (see, for example, Patent Document 2). This is to fix the end of the wire by screwing a locking tool consisting of a small screw into the female screw of the locking seat. The head of the small screw is round, whereas the locking seat has a truncated cone shape. ing. Also, the outer diameter of the locking seat is clearly larger than the outer diameter of the head of the machine screw. Furthermore, the tool for rotating the small screw at the time of attaching / detaching the small screw is dedicated to the small screw and does not act on the locking seat.

JP 2003-165440 A JP 2007-141742 A

  In such a conventional tangential mechanism, the old standard conforming type (see, for example, Patent Document 1) has an advantage that it can be easily manufactured as a standard product and the tool can be shared. For example, see Patent Document 2), there is an advantage that a tool cannot be shared but there is no fear of erroneous attachment / detachment operation. In other words, the old standard conforming type has a disadvantage in that it requires attention when attaching and detaching. That is, in the compliant tangential mechanism, the outer circumference of the first nut 41 for fixing the hexagon bolt 44 and the second nut 42 for fixing the wiring are not only hexagonal, but also the spanner 60. The flat diameters C and E that determine the conformity of are the same. For this reason, at the time of wiring work to the tangential mechanism, when the second nut 42 is loosened by operating the spanner 60, the first nut 41 is mistakenly operated and the bolt 44 is not displaced or removed. You must work carefully to avoid doing what you want.

However, at railway construction sites, etc., work is often done in harsh environments such as in hot weather or in extremely cold areas, and it is necessary to complete work in a short time by sewing between train passages, and where the tangential mechanism is difficult to see. It may be installed in. Therefore, while following the old standard of screwing the first to third nuts into the bolt, a part is changed or completely adapted to the old standard, and then the second nut is attached / detached. It is required to improve the first nut so that the first nut does not move immediately even if the nut is erroneously operated.
Therefore, it is a technical problem to realize a tangential mechanism with a function for preventing erroneous operation while taking over the basic structure with multiple stages of nuts and not having to worry about mistaken nuts when attaching and detaching.

  The tangential mechanism with an erroneous operation preventing function according to the present invention (Solution 1) was devised to solve such a problem. The bolt and the bolt are screwed first and fixed. A first nut, a second nut that is secondly screwed to the bolt and sandwiches the electrical wiring, and a third nut that is thirdly screwed to the bolt and prevents the second nut from coming off. In the tangential mechanism, the outer peripheral shape of the first nut and the outer peripheral shape of the second nut are so different that a tool suitable for the attaching / detaching operation of the second nut cannot be immediately used for the attaching / detaching operation of the first nut. It is characterized by.

  Further, the tangential mechanism with an erroneous operation preventing function of the present invention is (Solution means 2), the tangential mechanism with an erroneous operation preventing function of the above-mentioned Solution means 1, wherein the first nut and the second nut conform to different nut standards. However, the outer shape of the first nut is different from the outer shape of the second nut due to the different outer diameters.

  Further, the tangential mechanism with an erroneous operation preventing function of the present invention (Solution means 3) is the tangential mechanism with an erroneous operation preventing function of the above-mentioned Solution means 1, wherein the first nut and the second nut conform to the same nut standard. However, when the detachable outer fitting member is fitted onto the first nut and the outer peripheral shape of the first nut is changed from a single outer peripheral shape, the outer peripheral shape of the first nut and the first nut are changed. The outer shape of the two nuts is different.

In such a tangential mechanism with an erroneous operation preventing function of the present invention (Solution 1), the above-mentioned old standard has been taken over with respect to the basic structure in which the first to third nuts are screwed onto the bolt. Partial modifications have been made to the nut shape.
Specifically, the outer peripheral shapes of the first and second nuts are different, and the outer peripheral shapes of the first and second nuts are made irregular in this way, so that a tool suitable for attaching and detaching the second nut can be obtained. It is in a state where it cannot be used immediately for attaching / detaching 1 nut.

Therefore, when an operator performs wiring work on the tangential mechanism, an attempt was made to attach / detach the second nut using a tool suitable for attaching / detaching the second nut, and accidentally applied the tool to the first nut. However, the first nut does not move immediately. That is, the first nut does not move unless a conscious and concrete action such as tool change or preparatory work is added. Thereby, the erroneous operation of operating the first nut when the second nut is to be operated is reliably avoided.
Therefore, according to the present invention, it is possible to realize a tangential mechanism with an erroneous operation preventing function that does not have a risk of mistaking the nut during the attaching / detaching operation while taking over the basic structure having multiple stages of nuts.

In the tangential mechanism with an erroneous operation preventing function of the present invention (solution 2), the outer periphery of the first nut is such that a tool suitable for the second nut attaching / detaching operation cannot be used immediately for the first nut attaching / detaching operation. The state in which the shape and the outer peripheral shape of the second nut are different is embodied by making the outer diameters of the first and second nuts different. For this reason, the tool change is indispensable for the attaching / detaching operation of both the first and second nuts, so that the erroneous operation of the first nut during the attaching / detaching operation of the second nut is surely avoided. Nevertheless, since the first and second nuts are both standard products, they can be obtained easily and inexpensively.
Therefore, according to the present invention, a tangential mechanism with a function for preventing erroneous operation can be realized simply by following a part of the old standard which has been described above with a multi-stage nut, but partially changing the nut so that there is no fear of mistaking the nut at the time of attaching / detaching. can do.

Furthermore, in the tangential mechanism with an erroneous operation preventing function of the present invention (Solution means 3), the outer periphery of the first nut is such that a tool suitable for attaching / detaching the second nut cannot be immediately used for attaching / detaching the first nut. A state in which the shape and the outer peripheral shape of the second nut are different is simply realized by externally fitting a detachable external fitting member to the first nut.
Therefore, since the preparatory work of removing the outer fitting member is indispensable for the attaching / detaching operation of the first nut, the erroneous operation of the first nut at the time of the attaching / detaching operation of the second nut is surely avoided.

In addition, since the first and second nuts conform to the same nut standard, tools for attaching and detaching operations can be shared, and by adopting conventional nuts for the first and second nuts, other than the external fitting members can be easily used. It can be adapted to the old standards already mentioned. Since the outer fitting member is detachable, the tangential mechanism is easily and completely returned to the old standard conforming product by removing the outer fitting member.
Therefore, according to the present invention, it is possible to easily realize a tangential mechanism with an erroneous operation preventing function that is completely compatible with the above-described old standard in which the nut is multi-staged but does not have a risk of mistaking the nut during the attaching / detaching operation.

With respect to the tangential mechanism with an erroneous operation preventing function of the present invention, specific modes for carrying out this will be described with reference to the following first to third embodiments.
The embodiment 1 shown in FIG. 1 is the embodiment in which the above-described solving means 1 and 2 (claims 1 and 2 at the beginning of the application) are embodied in a reduced diameter mode, and the embodiment 2 shown in FIG. The above-described solving means 1 and 2 (claims 1 and 2 at the beginning of the application) are embodied in a diameter-expanding manner, and the third embodiment shown in FIG. Item 1 and 3) are embodied.
In the drawings, the same reference numerals are given to the same components as those in the prior art, and therefore, repeated explanations are omitted. Hereinafter, the differences from the prior art will be mainly described.

  The configuration of the tangential element 10 embodying the tangential mechanism with the erroneous operation preventing function according to the first embodiment of the present invention will be described with reference to the drawings. 1A is a side view of the tangential element 10 attached to the plate 50, FIG. 1B is a view taken along the line AA of the end face of the first nut 11, and FIG. 1C is an end face of the second nut 42. BB arrow line view, (d) is a front view of spanner 60 which is a tool.

This tangential element 10 is different from the conventional tangential element 40 described above in that a first nut 11 having a smaller outer diameter than that of the first nut 41 is incorporated.
The first nut 11 will be described with a specific example of the screw nominal diameter M6. The first nut 11 is not an old JRS or old JIS standard that is compatible with the second nut 42 but a nut standard different from that. It conforms to JIS B 1181, and the outer peripheral shape is hexagonal, but the flat diameter (minimum outer diameter) C1 is 10 mm and the diagonal (maximum outer diameter) D1 is about 11.05 mm. The diagonal D1 and the flat diameter C1 are smaller than the width G12 mm of the opening 61 of the spanner 60 and smaller than the flat diameter E12 mm of the second nut 42.

  With respect to the tangential element 10 (tangential mechanism with an erroneous operation preventing function) of the first embodiment, its usage and the like will be described with reference to the drawings. 1 (d) is a front view of the spanner 60, FIG. 1 (e) is a BB arrow view of the second nut 42 hung the spanner 60, and FIG. 1 (f) is a view of the first nut 11 hung the spanner 60. FIG. Here again, the description will focus on the differences from the prior art.

  Since the second nut 42 is conventional, it can be rotated using the spanner 60 (see FIG. 1E), but the diagonal (maximum outer diameter) D1 of the first nut 11 is smaller than the opening width G of the spanner 60. Therefore, even if the spanner 60 is hung on the first nut 11 and rotated, the spanner 60 rotates idle, so that the first nut 11 cannot be attached / detached using the spanner 60 (see FIG. 1F). . Therefore, when the second nut 42 is operated and loosened with the spanner 60 during wiring work to the tangential element 10, even if the first nut 11 is accidentally hooked with the spanner 60, the first nut 11 does not move. It does not lead to an undesired situation in which 44 is loosened. The attaching / detaching operation of the first nut 11 is performed with a tool such as a spanner corresponding to another nut standard described above, but such a standard tool can be easily procured from a commercial product or a general-purpose product.

  The configuration of the tangential element 20 embodying the tangential mechanism with the erroneous operation preventing function of the present invention will be described with reference to the drawings. 2A is a side view of the tangent 20 attached to the plate body 50, FIG. 2B is a view taken along the line AA of the end face of the first nut 21, and FIG. 2C is a view of the end face of the second nut 42. BB arrow line view, (d) is a front view of the spanner 60.

This tangential element 20 is different from the conventional tangential element 40 described above in that a first nut 21 having an outer diameter larger than that of the first nut 41 is incorporated.
The first nut 21 will be described with a specific example of a screw nominal diameter M6. The first nut 21 is not a standard of the old JRS or old JIS described above, which is compatible with the second nut 42, but a flat diameter (minimum outer diameter) C2. The flat diameter (minimum outer diameter) C2 is 13 mm and the diagonal (maximum outer diameter) is about 14.38 mm in accordance with different sizes of “JIS B 1181”. The flat diameter C2 is larger than the width G12 mm of the opening 61 of the spanner 60.

  With respect to the tangential element 20 (the tangential mechanism with an erroneous operation preventing function) of the second embodiment, its usage and the like will be described with reference to the drawings. 2 (d) is a front view of the spanner 60, FIG. 2 (e) is a view taken along the arrow BB when the spanner 60 is hung on the second nut 42, and FIG. 2 (f) is an attempt to hang the spanner 60 on the first nut 21. FIG. Here, the difference from the prior art will be described.

  Since the second nut 42 is conventional, it can be rotated using the spanner 60 (see FIG. 2E), but the flat diameter (minimum outer diameter) C2 of the first nut 21 is larger than the opening width G of the spanner 60. Therefore, since the spanner 60 cannot be hung on the first nut 21 in the first place, the first nut 21 cannot be attached / detached using the spanner 60 (see FIG. 2F). Therefore, when the second nut 42 is manipulated and loosened with the spanner 60 during the wiring work to the tangential element 20, even if the first nut 21 is accidentally put on the first nut 21, the first nut 21 does not move. It does not lead to an undesired situation in which 44 is loosened. The attaching / detaching operation of the first nut 21 is performed by a commercially available spanner or the like corresponding to another nut standard described above in this column.

  The configuration of the tangent 30 embodying the tangential mechanism with the erroneous operation preventing function according to the third embodiment of the present invention will be described with reference to the drawings. 3A is a side view of the tangent 30 attached to the plate 50, FIG. 3B is a view taken along the line AA of the end face of the first nut 41 and the external fitting member 31, and FIG. 3C is the second view. BB arrow view of the end surface of the nut 42, (d) is a rear view and side view of the outer fitting member 31, and a longitudinal side view and front view of the HH arrow view, and (e) is the outer fitting member 31 on the first nut 41. It is an AA arrow line view of the place which mounts.

The tangential element 30 is different from the conventional tangential element 40 described above in that the external fitting member 31 is externally fitted to the first nut 41.
The outer fitting member 31 is a flexible short cylindrical member. When the cutting member 32 is opened, the outer fitting member 31 expands to become a groove shape, but when the cutting member 32 is released, the outer fitting member 31 returns to a short cylindrical shape. The inner diameter in the free state is equal to or slightly smaller than the diagonal (maximum outer diameter) D of the first nut 41, and a reduced diameter portion 33 corresponding to the chamfer of the first nut 41 is formed at the end.
For example, such an external fitting member 31 is formed by cutting a thermoplastic tube by a predetermined length, and then heat-reducing the end portion to form a reduced diameter portion 33, and separating the entire length at one place in the circumferential direction. By forming the cutting part 32, it can be made easily and inexpensively.

In this case, by fitting the outer fitting member 31 to the first nut 41, the outer peripheral shape of the first nut 41 is changed from a hexagonal shape to a circular shape, and the outer diameter is larger than the opening width G. Therefore, if the external fitting member 31 is externally fitted to the first nut 41, the second nut 42 can be attached and detached with the spanner 60 as usual, but the first nut 41 cannot be attached and detached with the spanner 60. When the second nut 42 is loosened by operating the spanner 60 during wiring work to the tangential element 30, the first nut 41 does not move even if the spanner 60 is accidentally applied to the first nut 41. It does not lead to an undesired situation of loosening.
If the outer fitting member 31 is removed from the first nut 41, the tangential element 30 returns to the tangential element 40 described above, so that the first nut 41 can be attached and detached with the spanner 60.

About Example 1 of this invention, the structure and usage mode of a tangential mechanism with a misoperation prevention function are shown, (a) is a side view of a tangent, (b) is an AA arrow view of a 1st nut end surface, (c) is. BB arrow view of the end face of the second nut, (d) is a front view of the tool, (e) is a view of the BB arrow when the tool is applied to the second nut, and (f) is a tool applied to the first nut. However, it is an AA arrow view. About Example 2 of this invention, the structure and usage mode of a tangential mechanism with a misoperation prevention function are shown, (a) is a side view of a tangent, (b) is an AA arrow view of a 1st nut end surface, (c) is. BB arrow view of the end face of the second nut, (d) is a front view of the tool, (e) is a view of the BB arrow when the tool is applied to the second nut, and (f) is a tool applied to the first nut. However, it is an AA arrow view. About Example 3 of this invention, the structure and usage mode of a tangential mechanism with a misoperation prevention function are shown, (a) is a side view of a tangent, (b) is an AA arrow view of the end surface of a 1st nut and an external fitting member , (C) is a BB arrow view of the end face of the second nut, (d) is a rear view, a side view, a HH arrow view and a front view of the outer fitting member, and (e) is a fitting of the outer fitting member to the first nut. It is an AA arrow line view of where to do. The structure and usage of a conventional tangential mechanism without erroneous operation prevention function are shown, (a) is a side view of the tangential element, (b) is an AA arrow view of the first nut end face, and (c) is BB of the second nut end face. Arrow view, (d) is a front view of the tool, (e) is a view taken from the arrow BB when the tool is hung on the second nut, and (f) is a view from the arrow AA where the tool is hung on the first nut. It is.

Explanation of symbols

10 ... Tangent (tangential mechanism with erroneous operation prevention function),
11 ... 1st nut,
20 ... Tangent (tangential mechanism with erroneous operation prevention function),
21 ... 1st nut,
30 ... tangent (tangential mechanism with erroneous operation prevention function),
31 ... external fitting member, 32 ... cutting part, 33 ... reduced diameter part,
40 ... tangent (tangential mechanism without erroneous operation prevention function),
41 ... 1st nut, 42 ... 2nd nut, 43 ... 3rd nut,
44 ... Bolt, 45 ... Flat washer, 45a ... Belleville spring washer,
46 ... Plain washer, 47 ... Spring washer,
50 ... Plate body (tangent mechanism fixing point), 51 ... Through hole,
60 ... Spanner (tool), 61 ... Opening (action part)

Claims (1)

  A bolt, a first hex nut screwed first into the bolt to fix the bolt, a second hex nut screwed second into the bolt to clamp the electrical wiring, and a third screw into the bolt In the tangential mechanism provided with a third hex nut that is screwed to prevent the second hex nut from coming off, the first hex nut and the second hex nut conform to the same nut standard, It is made of a flexible short cylindrical member, and a cutting part is formed at one place in the circumferential direction. The cutting part is opened when the cutting part is opened. When the fitting member is externally fitted to the first hexagon nut and the outer peripheral shape of the first hexagon nut is changed from the single outer peripheral shape, a spanner suitable for attaching and detaching the second hexagon nut is the first hexagon nut. Immediately use for nut removal Erroneous operation preventing function tangent mechanism the outer peripheral shape as according to the first hexagonal nut without the outer peripheral shape of the second hexagonal nut, characterized in that the are different.

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