JP2017031569A - Connection structure of tongue rail and point-switch rod and connection pin fitting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably prevent a connection pin for connecting a tongue rail and a point-switch rod from falling off or dropping.SOLUTION: A connection pin 20 is inserted in a circular open holes 9a, 7a which are formed on an overlapping part between a connection plate 9 fixed on a tongue rail 5 and a connection fitting 7 fixed on a point-switch rod 6, and a locking open hole 6b which is formed on the point-switch rod 6 so as to be in communication with the circular open hole 7a. A bottom surface of a cylindrical part 22 butts against an end periphery of the locking open hole 6b on an upper surface 6a of the point-switch rod 6, which prevents the connection pin 20 from falling off downward. As the connection pin 20 in a state where a crossing part 26 protrudes from the locking open hole 6b is rotated around a central axis of the cylindrical part 22 and an upper surface 26a of the crossing part 26 faces a lower surface 6c of the point-switch rod 6, the connection pin 20 is prevented from falling off upward. Thus, the connection pin 20 can be more reliably prevented from falling off or dropping.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a connection structure between a tong rail and a rolling rod of a branching device of a railway track, and a method of attaching a connection pin used in this connection structure.

As shown in FIG. 8, the railroad track branching device has a basic rail 3 laid on a sleeper 1 through a floor plate 2, a lead rail 4 is laid on the inner side of the basic rail 3, and a lead rail 4 has a tip. The pair of tongrels 5 are slidably arranged. The pair of tongrels 5 are connected to each other by a rolling rod 6 disposed below the basic rail 3 and the tongrel 5 so as to cross the track.
Various connecting structures between the tongrel 5 and the rolling bar 6 have been conventionally devised. As shown in FIG. 9, the most general connection structure is fixed to the Tongrel 5 by bolts and nuts, and is fixed to the connecting rod 9 extending to the side of the Tongrel 5 and the rolling rod 6 by welding. And a connection fitting 7 having a U-shape for sandwiching the connection plate 9 from above and below. In addition, circular through holes are drilled in the overlapping portions of the connecting plate 9, the connecting bracket 7, and the rolling rod 6, and a cylindrical collar is inserted into the circular through hole of the connecting plate 9 to prevent conversion failure. Then, the bolt nut 8 is inserted and connected to the inside of the collar and the circular through hole of the connecting fitting 7 and the rolling rod 6. In consideration of the tightening operation, the bolt nut 8 is mounted so that the bolt is rolled and inserted from below to above the rod 6 and tightened from above. Further, in order to prevent the bolt from falling off when the bolt is broken, a drop-off prevention fitting 10 that supports the bolt head from below is fixed to the rolling rod 6 and the connecting fitting 7 (for example, Patent Documents). 1).

  On the other hand, the connecting structure of the conventional most common tongrel 5 and the rolling bar 6 as described above is the connecting plate 9 fixed to the tongrel 5 and the connecting structure fixed to the rolling bar 6. Since the metal fitting 7 is coupled using the bolt nut 8, the shaft portion of the bolt receives a shearing force when the tongrel 5 is operated. Therefore, it is necessary to frequently inspect and replace the bolt nut 8 in order to prevent the bolt from being broken due to stress concentration in the screw groove of the bolt. Eight detaching operations were required. Therefore, an invention has been devised in which a connecting plate 9 fixed to the Tongle rail 5 and a connecting fitting 7 fixed to the rolling rod 6 are connected using a connecting pin instead of a bolt and nut (for example, a patent) References 2 and 3).

Japanese Utility Model Publication No. 57-26402 JP 9-195202 A JP 2008-231792 A

The invention using the above-described connecting pin prevents the connecting pin from coming off or falling off by holding the connecting pin between the holding metal fitting and the falling-off preventing metal fitting, or between the falling-off preventing metal fitting and the rolling rod. However, these preventive measures have room for improvement from the viewpoint of workability of connection work.
The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to more reliably prevent disconnection and dropout of a connection pin for connecting the Tongrel and a rolling rod. .

(Aspect of the Invention)
The following aspects of the present invention exemplify the configuration of the present invention, and will be described separately for easy understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention, and some of the components of each section are replaced, deleted, or further while referring to the best mode for carrying out the invention. Those to which the above components are added can also be included in the technical scope of the present invention.

  (1) A connecting structure between a tongrail and a rolling rod of a branching device of a railway track, the connecting plate being fixed to the tongrail and extending to the side of the tongrel, and being fixed to the rolling rod. A connection fitting having a U-shape for sandwiching the connection plate from above and below, a circular through hole formed in each of the overlapping portions of the connection plate and the connection fitting, and an aspect communicating with the circular through hole And a connecting pin inserted into a circular through hole of the connecting plate and the connecting fitting, and the connecting pin includes a cylindrical portion, and the cylindrical portion of the cylindrical portion. An axially extending portion extending from the bottom along the central axis of the cylindrical portion to a length smaller than the cylindrical portion and exceeding the thickness of the rolling rod, and the cylindrical portion at the tip of the axially extending portion Extending in a direction intersecting the central axis of the cylindrical portion, in a plan view of the bottom surface of the cylindrical portion, The crossing portion having a size that does not exceed the outer periphery of the cylindrical portion and having an asymmetric shape with respect to the central axis, and the locking through-hole has a hole shape corresponding to a plan view shape of the crossing portion. The connecting pin has a state in which the bottom surface of the cylindrical portion abuts on the periphery of the edge of the locking through hole on the top surface of the rolling bar, and the intersecting portion protrudes downward from the through hole for locking. Thus, a connecting structure of a tongrel and a rolling rod inserted through the circular through hole and the locking through hole from above the circular through hole so as to be rotatable about the central axis as a rotation axis (claims) 1).

  The connecting structure of the tongrel and the rolling rod described in this section is the connecting plate fixed to the tongrel and extending to the side of the tongrel, and the connecting plate fixed to the turning rod and rotating the connecting plate from above and below. Circular through-holes are respectively formed in the overlapping portions with the connecting fittings having a U-shape for sandwiching them as possible. And a connection pin and a connection metal fitting are connected by the connection pin containing a cylindrical part being inserted with respect to these circular through-holes. That is, since the bolt and nut are not used for the connection between the connection plate and the connection metal fitting, the collar inserted into the circular through hole of the connection plate in the conventional connection structure using the bolt and nut becomes unnecessary. In addition, the connecting pin is provided with an axially extending portion having a smaller diameter than the cylindrical portion, extending from the bottom surface of the cylindrical portion along the central axis of the cylindrical portion, whereby the surface shape of the bottom surface of the cylindrical portion is It will be eroded by the axially extending portion to form an annular shape. Further, the connecting pin is provided with an intersecting portion extending in a direction intersecting the central axis of the cylindrical portion at the tip of the axially extending portion and having a size not exceeding the outer periphery of the cylindrical portion in a plan view of the bottom surface of the cylindrical portion. ing. Further, a locking through hole having a hole shape corresponding to the shape in plan view of the intersecting portion of the connecting pin is formed in the rolling bar in a form communicating with the circular through hole of the connecting metal fitting. That is, the through hole for locking has a hole shape corresponding to the plan view shape of the intersecting portion and does not exceed the outer periphery of the columnar portion inserted through the circular through hole, and thus is smaller than the circular through hole. Will have a shape. For this reason, when the inside of the circular through-hole is viewed from above the circular through-hole, the lock through-hole and the peripheral portion of the upper surface of the rolling bar on the edge of the lock through-hole can be confirmed.

  With the configuration as described above, when the connecting pin is inserted into the circular through hole and the locking through hole from above the circular through hole with the intersecting portion at the tip, the intersecting portion passes through the circular through hole and corresponds. The cylindrical portion enters the circular through hole while entering the lock through hole having the shape to be formed. Then, the connecting pin is inserted until the annular bottom surface of the cylindrical portion comes into contact with the periphery of the edge of the lock through hole on the top surface of the rolling rod, and is prevented from coming down downward. . At this time, since the axially extending portion extending between the cylindrical portion and the intersecting portion extends beyond the thickness of the rolling rod formed with the locking through hole, the intersecting portion of the connecting pin Passes through the locking through-hole and protrudes downward from the through-hole. In this state, the connecting pin can rotate about the central axis of the cylindrical portion as a rotation axis. Therefore, when the connecting pin is rotated to a position of a predetermined rotation angle, at least a part of the upper surface of the intersecting portion protruding from the locking through hole is formed. It becomes an aspect which opposes the peripheral part of the edge of the through-hole for a lock | rock of the lower surface of a rolling rod. As a result, the connecting pin is prevented from coming off upward. That is, the movement of the connecting pin in both the upper and lower directions is restricted by a state in which the connecting rod is sandwiched between the bottom surface of the cylindrical portion and the upper surface of the intersecting portion.

  In addition, since the connecting portion has an asymmetrical plan view shape with respect to the central axis of the cylindrical portion, for example, from the state where the connecting portion is rotated clockwise at a predetermined rotation angle, the intersecting portion is moved to the locking through hole. In order to be able to enter, that is, in a plan view of the lower surface of the rod, the shape of the lock through hole and the cross-sectional shape of the crossing portion coincide with each other in order to satisfy the predetermined rotation angle. It needs to be rotated clockwise or clockwise to an angle obtained by subtracting a predetermined rotation angle from 360 degrees. Furthermore, in order for the crossing portion to enter the locking through-hole from below, an upward force must act on the connecting pin in addition to the rotation described above. As described above, the connection structure of the tongrel and the rolling rod described in this section is such that the cross-sectional shape of the crossing portion is that of the locking through-hole with respect to the connecting pin protruding from the locking through-hole. By providing a phase difference in the rotational direction until the hole shape matches with the plan view, the connecting pin is firmly prevented from coming off. Further, since the retaining of the connecting pin is performed by a simple operation of inserting and rotating the connecting pin, it is expected that the working time is shortened when the retaining and fixing are performed artificially. Is. Further, since a retrofitting member is not used to prevent the connecting pin from coming off, it is possible to suppress forgetting to perform the retaining.

(2) In the above item (1), the connecting pin is inserted into the circular through hole and the locking through hole, and the central axis rotates from a state in which the intersecting portion passes through the locking through hole. A connecting structure of a tongrel and a rolling rod held in a state rotated 180 degrees as an axis (claim 2).
The connection structure between the tongrel and the falling rod described in this section is such that the connecting pin inserted into the circular through hole and the locking through hole passes from the state where the crossing portion passes through the locking through hole to the cylindrical portion. This is held in a state of being rotated 180 degrees with the central axis of the rotation axis as the rotation axis. That is, if the connecting pin is not rotated 180 degrees clockwise or counterclockwise, the intersecting portion having an asymmetric plan view shape with respect to the central axis of the cylindrical portion cannot enter the locking through hole. Accordingly, the connection pin is prevented from coming off even more firmly.

(3) In the above items (1) and (2), the axially extending portion is a cylindrical shape coaxial with the cylindrical portion, and the intersecting portion is a long plate extending along the radial direction of the cylindrical portion. And a connecting structure of the tongrel and the rolling bar at the position where the central portion in the longitudinal direction is offset from the central axis (Claim 3).
In the connection structure of the tongrel and the rolling bar described in this section, the axially extending portion is a cylindrical shape coaxial with the cylindrical portion, and the intersection of the connecting pins extends along the radial direction of the cylindrical portion. While forming a scale plate shape, the central part in the longitudinal direction is at a position offset from the central axis of the cylindrical part. That is, in the side view of the connecting pin with the columnar portion facing upward, the axially extending portion and the intersecting portion form an inverted T shape or L shape in which the horizontal bar is biased to one side. In this way, by making the axially extending portion and the intersecting portion simple shapes, it is easier to manufacture the connecting pins and corresponds to the planar view shape of the intersecting portions while further strengthening the retaining of the connecting pins. It is intended to facilitate the processing of the lock through hole having a hole shape.

(4) In the above items (1) to (3), the cylindrical portion is connected to the tongrel having a two-sided width provided at the end opposite to the axially extending portion and the tip. Structure (Claim 4).
The connection structure between the Tongleil and the rolling rod described in this section is artificially used when attaching or removing the connecting pin by providing a two-sided width to the cylindrical part of the connecting pin. The workability when rotating the connecting pin is improved.

(5) In the above paragraphs (1) to (4), a clamp portion for sandwiching the connection fitting and a cover portion for covering the upper end of the connection pin are provided, and the cover portion is attached to the connection fitting, A connecting structure of a tongrel and a rolling bar including a drop-off preventing metal fitting in which a gap is formed at the upper end of the connecting pin.
The connection structure between the Tongleil and the rolling bar described in this section is that the drop-off prevention bracket is fixed to the connection bracket by the clamp, and the cover of the drop-off prevention bracket covers the upper end of the connection pin with a gap. Thus, the connecting pin is prevented from coming off upward without applying excessive pressure from the connecting pin to the rolling rod.

  (6) A method for attaching a connecting pin in the connecting structure between the tongrel and the rolling bar as described in (1) to (5) above, wherein the connecting pin is formed into the circular through hole with the intersecting portion as a tip. Inserted from above, the connecting pin was rotated with the central axis of the cylindrical portion as the rotation axis, and the rotational phase was adjusted so that the hole shape of the locking through hole and the planar view shape of the intersecting portion coincided with each other Thereafter, the connecting pin is rotated about the central axis as the rotation axis in a state where the intersecting portion and the axially extending portion are inserted into the locking through hole and the intersecting portion protrudes from the locking through hole. Then, a connecting pin mounting method for causing at least a part of the upper surface of the intersecting portion to face the lower surface of the rolling bar (Claim 5).

  In the method for attaching the connecting pin described in this section, first, the connecting pin is inserted from above into a circular through hole formed in the connecting plate and the connecting fitting with the crossing portion of the connecting pin as a tip. Then, before the crossing portion of the connecting pin passes through the circular through hole and reaches the periphery of the edge of the lock through hole formed in the rolling rod on the upper surface of the rolling rod in a mode communicating with the circular through hole. Alternatively, after reaching, the connecting pin is rotated with the central axis of the cylindrical portion as the rotation axis, and the rotational phase is adjusted so that the hole shape of the locking through hole and the planar view shape of the intersecting portion coincide. As a result, the crossing portion can be inserted into the locking through hole, so that the crossing portion and the subsequent axially extending portion are inserted into the locking through hole, and the cylindrical portion is inserted to the bottom of the circular through hole. . Then, the annular bottom surface of the cylindrical portion is brought into contact with the periphery of the edge of the lock through hole on the top surface of the rolling rod to function as an annular seat surface, thereby preventing the connecting pin from coming off downward. Is to be applied.

Furthermore, the crossing provided at the tip of the axially extending portion is locked from the bottom of the cylindrical portion because the axially extending portion extends from the bottom surface of the cylindrical portion and extends beyond the thickness of the rod. When it is brought into contact with the periphery of the edge of the through hole for protrusion, it protrudes downward from the through hole for locking. In this state, the connecting pin is rotated around the central axis of the cylindrical portion, and at least a part of the upper surface of the intersecting portion is turned to face the lower surface of the rod, thereby preventing the connecting pin from coming off upward. It is something to apply. In this way, the connecting pin is securely prevented from coming off upward and downward.
In the above description, in order to insert the intersecting portion into the locking through hole, the connecting pin is rotated after being inserted into the circular through hole. However, before the connecting pin is inserted into the circular through hole, the circular through hole is inserted. Rotate the connecting pin above the hole with the central axis of the cylindrical part as the rotation axis, and set the connecting pin in a state where the rotation phase is matched so that the hole shape of the locking through hole matches the shape of the cross section in plan view. By inserting the circular through hole, the intersecting portion may be inserted into the lock through hole without rotating the connecting pin in the circular through hole.

  Since the present invention is configured as described above, it is possible to more reliably prevent the connecting pin for connecting the tongrel and the rolling rod from coming off or falling off.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the connection structure of the Tongleil and a rolling rod which concerns on embodiment of this invention, (a) is a side view, (b) is a top view. The connection structure around the connection pin of FIG. 1 is expanded and shown, (a) is a front view, (b) is a side view. It is a single figure of the connecting pin shown by FIG. 1, (a) is a front view, (b) is a side view, (c) is a bottom view. FIG. 2 is an enlarged view of only the rolling rod and the connecting fitting of FIG. 1, (a) is a plan view, (b) is a side view, and (c) is a bottom view. It is a single figure of the drop-off prevention metal fitting shown by FIG. 1, (a) is a top view, (b) is a side view, (c) is a front view. FIG. 4 is a single view of a connecting pin having a form different from that of the connecting pin of FIG. 3 used in the connecting structure of the tongrel and the rolling rod according to the embodiment of the present invention, where (a) is a front view and (b) is a side view. FIG. 4C is a bottom view. The state of the connecting pin inserted through the circular through hole and the locking through hole for explaining the connecting pin mounting method according to the embodiment of the present invention is shown continuously from the side. a) is inserted through the circular through-hole, (b) is rotated within the circular through-hole, (c) is inserted through the locking through-hole, and (d) is provided with a stopper. Indicates the state. It is a top view of the conventional branching device of a railroad track. It is AA sectional drawing of FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Here, parts that are the same as or equivalent to those of the prior art are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIG. 1, the connection structure 12 between the tongrel and the rolling bar according to the embodiment of the present invention is fixed to the tongrel 5 with a bolt and nut, and extends to the side of the tongrel 5. A connecting plate 9, a connecting metal 7 fixed to the rolling rod 6 by welding, and having a U-shape for sandwiching the connecting plate 9 so as to be rotatable from above and below, and a connecting portion of the connecting plate 9 and the connecting metal 7. Each of the circular through holes 9a and 7a (see FIGS. 2 and 4) drilled, and the lock through hole 6b (see FIGS. 2 and 4) drilled in the rolling rod 6 in a manner communicating with the circular through hole 7a. ) And a connecting pin 20 inserted through the circular through holes 9a and 7a. Further, the connection structure 12 includes a drop-off prevention metal fitting 16. Further, the connecting structure 12 between the tongrel and the rolling bar is more specifically, as can be seen in FIG. 2, the connecting pin 20 includes a circular through hole 9 a formed in the connecting plate 9 and the connecting fitting 7, 7 a and a through-hole 6 b for locking formed in the rolling rod 6. In FIG. 2A, the illustration of the drop-off prevention metal fitting 16 is omitted.

  When the configuration of each part is specifically confirmed, first, the connecting pin 20 is composed of a cylindrical portion 22, an axially extending portion 24, and an intersecting portion 26, as shown in FIG. The cylindrical portion 22 has a substantially constant outer diameter over its entire length, and in the example of FIG. 3, two cylindrical portions 22 are arranged at the end opposite to the axially extending portion 24 (upper side in FIGS. 3A and 3B). A surface width 22b is formed. The axially extending portion 24 extends from the bottom surface 22 a of the cylindrical portion 22 along the central axis C <b> 1 of the cylindrical portion 22. In the example of FIG. 3, the axial extending portion 24 has a cylindrical shape that is smaller in diameter than the cylindrical portion 22 and coaxial with the cylindrical portion 22. There is no. For this reason, the surface shape of the bottom surface 22a of the cylindrical portion 22 is eroded by the axially extending portion 24 to form an annular shape centering on the central axis C1. Moreover, the axial direction extending | stretching part 24 has the length exceeding the plate | board thickness (thickness of an up-down direction in FIG. 2) of the rolling rod 6 shown in FIG.1 and FIG.2.

  The intersecting portion 26 extends from the tip end of the axially extending portion 24 in a direction intersecting the central axis C1 of the cylindrical portion 22, and as can be confirmed in FIG. 3C, the plane of the bottom surface 22a of the cylindrical portion 22 is obtained. In view, it has a size that does not exceed the outer periphery of the cylindrical portion 22 and an asymmetric shape with respect to the central axis C1. More specifically, in the example of FIG. 3, the intersecting portion 26 has a width that is the same as the outer diameter of the axially extending portion 24 and has a long plate shape that extends along the radial direction of the cylindrical portion 22. As shown in FIGS. 3B and 3C, the central portion in the longitudinal direction is at a position offset from the central axis C1. And as FIG.3 (c) shows, one edge part (lower edge part in a figure) of the elongate direction of the cross | intersection part 26 is the cylindrical part 22 by planar view of the bottom face 22a of the cylindrical part 22. As shown in FIG. It extends to substantially the same position as the outer periphery of the cylindrical portion 22 and has an arc shape with the same curvature as the outer periphery of the cylindrical portion 22. Further, the other end portion (the upper end portion in the figure) of the intersecting portion 26 in the longitudinal direction forms a flat straight line in a plan view of the bottom surface 22 a of the cylindrical portion 22. For this reason, as shown in FIG. 3B, the axially extending portion 24 and the intersecting portion 26 form an inverted T shape in which the horizontal bar is biased to the right side as viewed from the side.

  For example, the connecting pin 20 has an outer diameter of the cylindrical portion 22 of 38 mm, an outer diameter of the axially extending portion 24 of 10 mm, a length of the axially extending portion 24 of 20 mm, a width of the intersecting portion 26 of 10 mm, and a center. The length from the axis C1 to one end in the longitudinal direction of the intersecting portion 26 is 19 mm, and the length from the central axis C1 to the other end in the longitudinal direction of the intersecting portion 26 is 10 mm. Moreover, the connecting pin 20 is produced by, for example, performing a cutting process on a cylindrical member.

  On the other hand, as shown in FIG. 4, the locking through-hole 6 b formed in the rolling rod 6 has a hole shape corresponding to the planar view shape of the intersecting portion 26 of the connecting pin 20. In the example of FIG. 4, the lock through-hole 6 b has a long elliptical hole shape in which the end in the long direction (left-right direction in the figure) has an arc shape. The hole 7a is formed at a position biased to the left in the drawing. As an example, the locking through-hole 6b has a vertical width of 11 mm in FIGS. 4A and 4C, an arc radius of both ends in the longitudinal direction of 5.5 mm, and a central axis C2 of the circular through-hole 7a. The distance from the center of the circular through hole 7a to the center of the arc of one end in the longitudinal direction (the left end in the figure) is 18 mm, and the other end in the longitudinal direction (the end on the right in the figure) ) To the center of the arc is 10 mm. Further, the depth of the lock through-hole 6b, that is, the plate thickness of the rolling bar 6 is 19 mm. On the other hand, the inner diameter of the circular through-hole 7a provided in the connecting fitting 7 is 38.5 mm, and the inner diameter of the circular through-hole 9a (see FIG. 2) provided in the connecting plate 9 is 42 mm.

  Now, referring again to FIG. 2, as described above, the connecting pin 20 includes the circular through holes 9 a and 7 a formed in the connecting plate 9 and the connecting fitting 7, and the locking through hole formed in the rolling rod 6. It is inserted through the hole 6b. The connecting pin 20 is inserted into the circular through holes 9a and 7a from above before the drop-off preventing metal fitting 16 is attached, and the bottom surface 22a (see FIG. 3) of the cylindrical portion 22 is locked to the upper surface 6a of the rolling bar 6. It abuts on the periphery 6d (see FIG. 4) of the edge of the through hole 6b for use. Further, the axially extending portion 24 extending from the bottom surface 22a of the cylindrical portion 22 is inserted into the locking through hole 6b, and the intersecting portion 26 provided at the tip of the axial extending portion 24 is downward from the locking through hole 6b. Protruding to The connecting pin 20 is rotated about the central axis C1 (see FIG. 3) of the cylindrical portion 22 as a rotation axis, and at least a part of the upper surface 26a of the intersecting portion 26 is rotated so as to face the lower surface 6c of the rolling bar 6. In the example of FIG. 2, the longitudinal direction of the locking through-hole 6 b and the longitudinal direction of the intersecting portion 26 are in a rotational position that forms approximately 90 degrees.

As shown in FIGS. 2 and 5, the drop-off prevention metal fitting 16 includes a clamp portion 16 a for sandwiching the connection fitting 7 and a cover portion 16 b covering the upper end of the connection pin 20, and is attached to the connection fitting 7. In the state, a gap S is formed between the cover portion 16 b and the upper end of the connecting pin 20. Further, a hole 16c is provided in the clamp part 16a of the drop-off preventing metal fitting 16, and a wire is passed through the hole 16c, and the clamp part 16a is tightened by the wire, thereby matching the elastic clamping force of the clamp part 16a. Thus, the drop-off preventing metal fitting 16 is securely fixed to the connecting metal fitting 7.
2 indicates a protrusion fixed to the connecting plate 9 for reducing the burden on the connecting pin 20 when the connecting fitting 7 is brought into contact with the Tongrel 5 in operation.

Next, a mounting method of the connecting pin according to the embodiment of the present invention for mounting the connecting pin 20 in the above-described connecting structure 12 of the tongrel and the rolling bar will be described with reference to FIG. In FIG. 7, in order to show the state of the connecting pin 20 in an easy-to-understand manner, the rolling bar 6, the connecting bracket 7, and the connecting plate 9 are indicated by phantom lines.
First, as shown in FIG. 7 (a), the connecting pin 20 is inserted into the circular through holes 9a and 7a drilled in the connecting plate 9 and the connecting bracket 7 from above with the crossing portion 26 as a tip. At this time, assuming that each member shown in FIG. 7 has the dimensions exemplified in the description of each member using FIGS. 3 and 4, the inner diameter of the circular through hole 7a is 38.5 mm. On the other hand, since the outer diameter of the cylindrical portion 22 of the connecting pin 20 is 38 mm, the central axis C1 of the cylindrical portion 22 and the central axis C2 of the circular through hole 7a are substantially coincident with each other. In this state, the connecting pin 20 is inserted until just before the intersecting portion 26 reaches the locking through hole 6b.

  Next, as shown in FIG. 7 (b), the connecting pin 20 is rotated about the central axis C1 as the rotation axis by using the two-surface width 22b formed in the cylindrical portion 22, and the hole of the lock through hole 6b. The rotational phase is adjusted so that the shape and the planar view shape of the intersecting portion 26 match. That is, in the example of FIG. 7, the locking through-hole 6b having a long elliptical hole shape is formed at a position deviated to the left in the drawing with respect to the circular through-hole 7a, with the horizontal direction in the drawing as the long direction. Therefore, the connecting pin 20 is rotated until the intersecting portion 26 having a long plate shape is offset from the central axis C1 to the left side in the drawing with the left-right direction in the drawing as the long direction. Specifically, the connecting pin 20 is rotated about 90 degrees from the state of FIG. 7A to the state of FIG. 7B.

  Since the above-described rotation of the connecting pin 20 allows the crossing portion 26 of the connecting pin 20 to be inserted into the lock through hole 6b, the connecting pin 20 is further inserted downward, as shown in FIG. In this manner, the bottom surface 22a of the cylindrical portion 22 is brought into contact with the periphery 6d of the edge of the locking through hole 6b on the top surface 6a of the rolling rod 6. Then, since the axially extending portion 24 extending from the bottom surface 22a of the cylindrical portion 22 has a length (for example, 20 mm) exceeding the plate thickness (for example, 19 mm) of the rolling rod 6, the axially extending portion 24 The intersecting portion 26 provided at the tip projects downward from the locking through hole 6b.

Subsequently, as shown in FIG. 7D, by using the two-surface width 22b, the connecting pin 20 is rotated about the central axis C1 as the rotation axis, so that at least a part of the upper surface 26a of the intersecting portion 26 is rolled. It is made to oppose the lower surface 6c of the lever bar 6. Specifically, from the state of FIG. 7C to the state of FIG. 7D, the connecting pin 20 is rotated about 180 degrees. By the work so far, the attachment method of the connecting pin is completed.
A mechanism for holding the connecting pin 20 at the rotational position shown in FIG. 7 (d) may be provided in advance. For example, on the lower surface 6c of the rolling bar 6 at two positions where the front end on the right side of the crossing portion 26 shown in FIG. You may provide two protrusions of the height which suppresses the rotation of the connecting pin 20 resulting from it, and does not prevent the artificial rotation of the connecting pin 20. In this case, when attaching the connecting pin 20, after the intersecting portion 26 protrudes from the locking through-hole 6 b, the tip of the crossing portion 26 having a long plate shape on the biasing direction side falls down. What is necessary is just to rotate the connection pin 20 by making the central axis C1 into a rotating shaft so that it may be located between the two protrusions provided in the lower surface 6c. Also, in this case, for example, the amount of protrusion of the two protrusions from the lower surface 6c of the rolling bar 6 is set to such an extent that when the connecting pin 20 is rotated, the intersection 26 is lightly slid and rotational resistance is generated. Is desirable.

  Now, according to the embodiment of the present invention configured as described above, the following operational effects can be obtained. In other words, the connection structure 12 between the tongrel and the rolling bar according to the embodiment of the present invention is fixed to the tongrail 5 and to the side of the tongrel 5 as shown in FIGS. Circular through-holes 9a and 7a are respectively formed at overlapping portions of the extending connecting plate 9 and the connecting fitting 7 having a U-shape that is fixed to the rolling bar 6 and sandwiches the connecting plate 9 from above and below. Is formed. And the connection with the connection board 9 and the connection metal fitting 7 is performed by the connection pin 20 containing the cylindrical part 22 being penetrated by these circular through-holes 9a and 7a. That is, since the bolts and nuts 8 (see FIG. 9) are not used for the connection between the connection plate 9 and the connection fitting 7, the conventional connection structure using the bolts and nuts 8 is provided with the connection plate 9 in order to prevent defective conversion. The collar inserted into the circular through-hole is not necessary in the connecting structure 12 between the present Tongleil and the rolling bar.

  Moreover, as shown in FIG. 3, the connecting pin 20 is provided with an axially extending portion 24 having a smaller diameter than the cylindrical portion 22 extending from the bottom surface 22 a of the cylindrical portion 22 along the central axis C <b> 1 of the cylindrical portion 22. Thus, the surface shape of the bottom surface 22a of the cylindrical portion 22 is eroded by the axially extending portion 24 to form an annular shape. Further, the connecting pin 20 extends in the direction intersecting the central axis C1 of the cylindrical portion 22 at the tip of the axially extending portion 24, and does not exceed the outer periphery of the cylindrical portion 22 in a plan view of the bottom surface 22a of the cylindrical portion 22. A crossing 26 is provided. Further, as shown in FIG. 4, the locking rod 6 has a hole shape corresponding to the shape in plan view of the intersecting portion 26 of the connecting pin 20 in a form communicating with the circular through hole 7 a of the connecting metal 7. A through-hole 6b for use is formed. That is, the locking through-hole 6b has a hole shape corresponding to the planar view shape of the intersecting portion 26 having a size not exceeding the outer periphery of the cylindrical portion 22 inserted through the circular through-hole 7a. It will have a hole shape smaller than 7a. Therefore, as shown in FIG. 4 (a), when the inside of the circular through hole 7a is viewed from above the circular through hole 7a, the lock through hole 6b and the upper surface 6a of the rolling rod 6 are locked through. A peripheral portion 6d of the edge of the hole 6b can be confirmed.

  For this reason, as can be confirmed in FIG. 2, the connecting pin 20 is inserted into the circular through holes 9a and 7a and the lock through hole 6b from above the circular through hole 7a with the intersecting portion 26 as a tip. The intersecting portion 26 passes through the circular through hole 7a and enters the corresponding lock through hole 6b, and the cylindrical portion 22 enters the circular through holes 9a and 7a. The connecting pin 20 is inserted until the annular bottom surface 22a of the cylindrical portion 22 comes into contact with the periphery 6d of the edge of the locking through hole 6b of the top surface 6a of the rolling rod 6 to prevent it from coming down downward. Is given. At this time, the axially extending portion 24 extending between the cylindrical portion 22 and the intersecting portion 26 extends to a length exceeding the plate thickness of the rolling rod 6 in which the locking through-hole 6b is formed. The intersecting portion 26 of the connecting pin 20 passes through the locking through hole 6b and protrudes downward from the through hole 6b. In this state, the connecting pin 20 can rotate about the central axis C1 of the cylindrical portion 22 as a rotation axis. Therefore, when the connecting pin 20 is rotated to a position of a predetermined rotation angle, the upper surface of the intersecting portion 26 protruding from the locking through hole 6b. At least a part of 26a is in a mode of facing the peripheral portion of the edge of the lock through hole 6b on the lower surface 6c of the rolling bar 6. As a result, the connecting pin 20 is prevented from coming off upward. In other words, the connecting pin 20 is configured to sandwich the pin 6 between the bottom surface 22a of the cylindrical portion 22 and the top surface 26a of the intersecting portion 26, thereby restricting movement in both the upper and lower directions.

  Moreover, since the crossing portion 26 has an asymmetric plan view shape with respect to the central axis C1 of the cylindrical portion 22, the connecting pin 20 has, for example, a state in which the crossing portion 26 is rotated from a state rotated at a predetermined rotation angle clockwise. The state in which the locking through hole 6b can enter, that is, the shape of the locking through hole 6b and the shape of the intersecting portion 26 in plan view coincide with each other in the plan view of the lower surface 6c of the falling rod 6. Therefore, it is necessary to rotate counterclockwise to the predetermined rotation angle described above, or clockwise to an angle obtained by subtracting the predetermined rotation angle from 360 degrees. Furthermore, in order for the intersection 26 to enter the locking through hole 6b from below, an upward force must act on the connecting pin 20 in addition to the rotation described above. As described above, in the connection structure 12 between the tongue and the rolling bar, the cross-sectional shape of the crossing portion 26 in the plan view of the crossing portion 26 protrudes from the locking through-hole 6b. By providing a phase difference in the rotation direction until the hole shape matches with the hole shape in plan view, the connecting pin 20 can be firmly prevented from coming off. As a result, it is possible to more reliably prevent the connecting pin 20 from coming off or falling off. Furthermore, since the retaining of the connecting pin 20 is performed by a simple operation of inserting and rotating the connecting pin 20, it is expected to shorten the work time when the retaining and fixing are artificially performed. can do. In addition, since a retrofitting member is not used to prevent the connection pin 20 from coming off, it is possible to suppress forgetting to carry out the retaining.

  Further, in the connection structure 12 between the tongrel and the rolling rod according to the embodiment of the present invention, the connection pin 20 inserted through the circular through holes 9a and 7a and the lock through hole 6b is provided, and the crossing portion 26 is provided. From the state of passing through the locking through-hole 6b, it may be held in a state of being rotated 180 degrees around the central axis C1 of the cylindrical portion 22 (see FIG. 7D). In this case, if the connecting pin 20 is not rotated 180 degrees clockwise or counterclockwise, the crossing portion 26 having an asymmetrical plan view shape with respect to the central axis C1 of the cylindrical portion 22 enters the locking through hole 6b. I can't. Therefore, the connecting pin 20 can be prevented from coming off even more firmly.

In addition, as shown in FIG. 3, the connecting structure 12 between the tongrel and the rolling bar has a cylindrical shape in which the axially extending portion 24 is coaxial with the cylindrical portion 22, and the intersecting portion 26 of the connecting pin 20 is While forming the elongate plate shape extended along the radial direction of the cylindrical part 22, the center part of the elongate direction exists in the position offset from the central axis C1 of the cylindrical part 22. FIG. That is, in the side view of the connecting pin 20 with the cylindrical portion 22 facing upward (see FIG. 3B), the axially extending portion 24 and the intersecting portion 26 form an inverted T shape in which the horizontal bar is biased to one side. Is. In this way, by making the axially extending portion 24 and the intersecting portion 26 simple, it is possible to facilitate the manufacture of the connecting pin 20 and to make the flat surface of the intersecting portion 26 while further preventing the connecting pin 20 from coming off. The lock through-hole 6b having a hole shape corresponding to the visual shape can be easily processed. The axially extending portion 24 may be a polygonal column or a plate as long as it can rotate around the central axis C1 within the lock through hole 6b.
Further, in the connection structure 12 of the tongrel and the rolling bar according to the embodiment of the present invention, as shown in FIG. A connecting pin 20 ′ that forms an L shape with 26 may be used. That is, the connecting pin 20 ′ is such that the intersecting portion 26 ′ extends only in one direction (right direction in FIG. 6B) from the tip of the axially extending portion 24. In this case, the production of the connecting pin 20 ′ is further facilitated.

Furthermore, if the two-sided width 22b is provided in the cylindrical portion 22 of the connecting pins 20, 20 ′, the connecting pins 20, 20 ′ are artificially used when the connecting pins 20, 20 ′ are attached or detached. Workability at the time of rotating can be improved.
Further, as shown in FIGS. 2 and 5, the connection structure 12 between the tongrel and the rolling bar is configured such that the drop-off prevention metal fitting 16 is fixed to the connection metal fitting 7 by the clamp portion 16 a, and the cover portion 16 b of the drop-off prevention metal fitting 16. By covering the upper end of the connecting pin 20 with a gap S between the connecting pin 20 and the rolling pin 6 without excessive pressure, the connecting pin 20 is prevented from coming off upward. It is.

  On the other hand, the connecting pin mounting method according to the embodiment of the present invention is first formed on the connecting plate 9 and the connecting bracket 7 with the intersecting portion 26 of the connecting pin 20 as the tip, as shown in FIG. The connecting pin 20 is inserted into the circular through holes 9a and 7a from above. And the crossing part 26 of the connecting pin 20 passes through the circular through holes 9a and 7a, and is for the lock formed in the rolling rod 6 in a mode communicating with the circular through hole 7a on the upper surface 6a of the rolling rod 6. Before or after reaching the periphery 6d of the edge of the through hole 6b, as shown in FIG. 7B, the connecting pin 20 is rotated about the central axis C1 of the cylindrical portion 22 as the rotation axis, and the lock through hole 6b The rotational phase is adjusted so that the shape of the hole and the shape of the intersecting portion 26 in plan view coincide. As a result, the crossing portion 26 can be inserted into the locking through-hole 6b. Therefore, as shown in FIG. 7C, the crossing portion 26 and the subsequent axially extending portion 24 are inserted into the locking through-hole 6b. While inserting, the cylindrical part 22 is inserted to the bottom of the circular through-hole 7a. Then, the annular bottom surface 22a of the cylindrical portion 22 is brought into contact with the periphery 6d of the edge of the locking through hole 6b of the upper surface 6a of the rolling bar 6 so as to function as an annular seating surface. 20 is prevented from coming off downward.

  Furthermore, the crossing portion 26 provided at the tip of the axially extending portion 24 extends from the bottom surface 22a of the cylindrical portion 22 to a length exceeding the plate thickness of the rod 6 because the axially extending portion 24 extends. When the bottom surface 22a of the cylindrical portion 22 is brought into contact with the periphery 6d of the edge of the locking through-hole 6b, it protrudes downward from the locking through-hole 6b. In this state, as shown in FIG. 7D, the connecting pin 20 is rotated with the central axis C <b> 1 of the cylindrical portion 22 as the rotation axis, and at least a part of the upper surface 26 a of the intersecting portion 26 is turned around. By facing the lower surface 6c, the connecting pin 20 is prevented from coming off upward. In this way, the connection pin 20 can be prevented from coming off or falling off more securely by firmly preventing the connection pin 20 from coming out upward and downward.

  In the description so far, the state in which the hole shape of the locking through hole and the shape of the intersecting portion in plan view are “matched” means that the lock through hole having a hole shape corresponding to the shape of the intersecting portion in plan view is used. On the other hand, it is shown that the outer periphery of the intersecting portion is placed inside the inner periphery of the locking through hole in a plan view so that the intersecting portion can be inserted. For this reason, as can be confirmed in FIGS. 3 and 4, the shape of the intersecting portion 26 of the connecting pin 20 in plan view and the hole shape of the locking through-hole 6 b of the falling rod 6 must be necessarily the same shape. There is no.

5: Tongleil, 6: Falling rod, 6a: Upper surface of the rolling rod, 6b: Locking through hole, 6c: Lower surface of the rolling rod, 6d: Around the edge of the locking through hole, 7: Connecting metal, 7a: circular through-hole, 9: connecting plate, 9a: circular through-hole, 12: connecting structure of tongrel and rolling rod, 20, 20 ': connecting pin, 22: cylindrical part, 22a: cylindrical Bottom surface, 22b: width across flats, 24: axially extending portion, 26, 26 ': crossing portion, 26a, 26a': top surface of crossing portion, C1: central axis of cylindrical portion

Claims (5)

It is a connection structure between the Tongreil of a railroad track branching device and a rolling rod,
A connecting plate fixed to the tongue rail and extending to the side of the tongrel,
A coupling fitting having a U-shape that is fixed to the rolling rod and sandwiches the coupling plate from above and below,
Circular through holes each drilled in the overlapping portion of the connecting plate and the connecting metal fitting,
A locking through-hole drilled in the rolling rod in a manner communicating with the circular through-hole,
A connecting pin inserted through a circular through hole of the connecting plate and the connecting metal fitting,
The connecting pin includes a cylindrical portion, and an axially extending portion extending from the bottom surface of the cylindrical portion along the central axis of the cylindrical portion to a length smaller than the cylindrical portion and exceeding the thickness of the rolling bar. And extending to the tip of the axially extending portion in a direction intersecting the central axis of the cylindrical portion, and in a plan view of the bottom surface of the cylindrical portion, with a size that does not exceed the outer periphery of the cylindrical portion and with respect to the central axis Composed of intersections with asymmetric shapes,
The locking through hole has a hole shape corresponding to the planar view shape of the intersecting portion,
In the connecting pin, the bottom surface of the cylindrical portion is in contact with the periphery of the edge of the locking through hole on the top surface of the rolling rod, and the intersecting portion protrudes downward from the locking through hole. The connection between the Tongleil and the rolling rod is inserted into the circular through hole and the locking through hole from above the circular through hole so as to be rotatable about the central axis as a rotation axis. Construction.   The connecting pin is inserted into the circular through hole and the locking through hole, and is held in a state rotated 180 degrees around the central axis as a rotation axis from a state where the intersecting portion has passed through the locking through hole. The connecting structure of the tongrel and the rolling bar according to claim 1. The axially extending portion is a cylindrical shape coaxial with the cylindrical portion,
The said crossing part comprises the elongate plate shape extended along the radial direction of the said cylindrical part, The center part of a elongate direction exists in the position offset from the said central axis. Connection structure of Tongleil and rolling bar.   4. The tongrel and rolling rod according to claim 1, wherein the cylindrical portion is provided with a width across from the end opposite to the axially extending portion. 5. Connecting structure with. A method of attaching a connecting pin in a connecting structure of a tongrel and a rolling bar according to any one of claims 1 to 4,
The connecting pin is inserted into the circular through-hole from above with the intersecting portion as a tip, and the connecting pin is rotated about the central axis of the columnar portion as a rotation axis so as to intersect the hole shape of the locking through-hole. After the rotational phase is adjusted so that the shape of the portion matches the plan view, the intersecting portion and the axially extending portion are inserted into the locking through hole, and the intersecting portion is protruded from the locking through hole. In this state, the connecting pin is rotated with the central axis as a rotation axis, and at least a part of the upper surface of the intersecting portion is opposed to the lower surface of the rolling bar.

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