JP2007270452A - Switch guard mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch guard mounting structure which facilitates adjustment of a flangeway width, and contributes to reduction of power consumption. <P>SOLUTION: According to the switch guard mounting structure, a fastening bolt 15 is a T-bolt having a T-shaped bolt head 15a, and the bolt head 15a is inserted into through holes 12d, 13b in a direction from a mounting member 13 toward a switch guard 12, as shown in the two-dot chain line, to thereby fasten the switch guard 12 and the mounting member 13 together. When the fastening bolt 15 is inserted into the through holes 12d, 13b and at the same time rotated about a bolt shaft, the bolt head 15a is hooked on a hook portion 12e. An indicator portion 15c functions to check a rotational position at which the bolt head 15a is hooked on the hook portion 12e, and is formed of a linear groove for checking a mounting direction. Further, fastening nuts 16a, 16b are mounted on a male screw portion 15b, functions to fasten the switch guard 12 to the mounting member 13, and has a detent function imparted thereto. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a point guard mounting structure in which a point guard for preventing wear of a point portion of a branching device is attached to a mounting member by a fastening member.

FIG. 12 is a plan view schematically showing an installed state of a conventional point guard.
A conventional branching device 101 shown in FIG. 12 includes convertible Tonglers 102a and 102b with sharpened tips, and basic rails 103a and 103b on which the tips of the Tongrels 102a and 102b are closely attached and separated. (For example, refer to Patent Document 1). In such a conventional branching device 101, as shown in FIG. 12, when the branching device 101 is a curved branching device installed in a curved section, the wear of the tongrel 102a is very fast. A point guard 104 may be installed to prevent side wear. For example, if the branch 101 point guard 104 shown in FIG. 12 is not installed, when the splitter 101 and passes through the vehicle enters the branch line R _2, wheels W of the curve outside (curve outside) ₁ There collide with the tongue rail 102a of the curve outside, acts lateral force in the axle direction between the tongue rail 102a and the wheel W _1. In particular, as shown in FIG. 12, when the splitter 101 is curved splitter installed in the curved section, the branch line R ₂ from the reference line R ₁ is inwardly splitter which branches inwardly of curves, lateral pressure is more increased more higher between the wheel W ₁ and the tongue rail 102a, the side wear of the tongue rail 102a becomes severe.

On the other hand, as shown in FIG. 12, when the point guard 104 is installed in the branching device 101, the wheel W ₂ on the curve inner side (inner gauge side) is the point guard immediately before the wheel W ₁ collides with the tongrel 102a. for contact with 104, it can be lateral forces between the wheel W ₁ and the tongue rail 102a is reduced, to reduce the side wear of the tongue rail 102a.

JP 2002-069902 JP

FIG. 13 is a cross-sectional view showing a conventional point guard mounting structure.
In the conventional point guard 104 mounting structure shown in FIG. 13, the fastening bolt 109 is passed through the point guard 104 and the mounting member 105, the fastening nut 108 is fastened to the fastening bolt 109, and the mounting portion 104 b of the point guard 104 is attached. It is attached to the attachment portion 105a of the member 105. In such a conventional point guard 104 mounting structure, as shown by a two-dot chain line in the figure, a hand is inserted into a small space below the point guard 104 and tightened from the point guard 104 toward the mounting member 105. Bolt 109 is inserted. For this reason, in the conventional point guard 104 mounting structure, a worker who inserts the fastening bolt 109 and a worker who fastens the fastening nut 108 to the fastening bolt 109 are required, which is troublesome and labor-saving. There was a problem that could not be achieved. Further, in the conventional mounting structure of the point guard 104, since the lower space is covered by the point guard 104, the operator cannot visually confirm and insert the fastening bolt 109 into the point guard 104. There is a problem that takes time.

As shown in FIG. 12, when the branching unit 101 are the wheel W ₂ passes, in contact with the guard portion 104a and the wheel W ₂ point guard 104 or, the basic rail 103b and the wheel W ₂ is out of contact. As a result, the guard 104a of the point guard 104 and the rail head side surface of the basic rail 103b are gradually worn, and the flange way width W shown in FIGS. 12 and 13 changes. In the conventional point guard 104 mounting structure, as shown in FIG. 13, an adjustment washer 106 is inserted between the mounting portion 104 b on the point guard 104 side and the mounting portion 105 a on the mounting member 105 side, or the mounting member 105. The flange washer width W is adjusted to an appropriate value by inserting an adjustment washer 106 between the washer surface 105b and the washer 107. In this case, in the conventional attachment structure of the point guard 104, it is necessary to select and insert an optimum thickness of several kinds of adjustment washers 106 having different thicknesses. For this reason, when the flange way width W does not reach an appropriate value, as in the assembly operation, the operator loosens the fastening nut 108 once attached and inserts his hand into the slight space below the point guard 104 to fasten the fastening bolt 109. And a worker who removes it. As a result, there is a problem that the adjustment work takes time and the work time becomes long.

  The subject of this invention is providing the attachment structure of the point guard which can adjust a flange way width | variety easily and can aim at labor saving.

The present invention solves the above-mentioned problems by the solving means described below.
In addition, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this embodiment.
In the first aspect of the present invention, as shown in FIG. 2, the point guard (12) for preventing wear of the point portion (2) of the branching device (1) is attached to the attachment member (13) by the fastening member (14). In the guard mounting structure, the fastening member inserts a bolt head (15a) into the through hole (12d, 13b) from the mounting member toward the point guard, and the point guard and the mounting member are connected to each other. A point guard mounting structure (11) comprising a fastening bolt (15) for fastening.

  According to a second aspect of the present invention, in the point guard mounting structure according to the first aspect, when the fastening bolt is rotated around the bolt axis while being inserted into the through hole, 12e) is a point guard mounting structure in which the bolt head is hooked.

  According to a third aspect of the present invention, in the attachment structure of the point guard according to the second aspect, as shown in FIG. 7, the fastening bolt confirms a rotational position where the bolt head is latched to the latching portion. It is a point guard attachment structure provided with the indicator part (15c) for doing.

  According to a fourth aspect of the present invention, in the point guard mounting structure according to any one of the first to third aspects, the fastening member is fastened to be attached to the fastening bolt as shown in FIG. The point guard mounting structure includes a nut (16a, 16b), and the fastening nut includes a locking portion (16d) that prevents the fastening bolt from loosening.

  According to a fifth aspect of the present invention, in the point guard mounting structure according to any one of the first to fourth aspects, as shown in FIG. 7, the fastening bolt has a T-shaped bolt head. This point guard mounting structure is characterized in that it is a T bolt.

  According to the present invention, the flange way width can be easily adjusted, and labor saving can be achieved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing an installation state of a point guard in a point guard mounting structure according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state cut along line II-II in FIG. 3 is an external view of the point guard in the point guard mounting structure according to the embodiment of the present invention, FIG. 3 (A) is a plan view, and FIG. 3 (B) is the IIIB direction of FIG. 3 (A). It is the front view seen from. FIG. 4 is an enlarged front view showing a portion IV in FIG. FIG. 5 is a cross-sectional view showing a state cut along line VV in FIG. In FIG. 1, only one basic rail and the Tongler are shown in the point part of the branching device as shown in FIG. 12, and the other basic rail and the Tongrel are not shown.

The branching device 1 shown in FIG. 1 is a device that divides one track into two or more tracks. Splitter 1 shown in the figures, for example, as shown in FIG. 12, a branching unit opens pieces branch line R ₂ divided from the reference line R _1, curve as the inner branching unit is installed, for example, on a curved section It is a turnout.

  The point portion 2 is a portion that changes the course of the vehicle by dividing the track, and includes a tongrel 3, a basic rail 4, a rolling rod 5, a floor board 6, and the like. The tong rail 3 is a convertible movable rail with a sharpened tip, and the basic rail 4 is a fixed rail with which the tip of the tongrel 3 is closely attached and separated. The rolling bar 5 is a member for converting the Tongrel 3 and is driven by a conversion force generated by a rolling machine (not shown) to cause the Tongrel 3 to perform a conversion operation. The floor board 6 is a member that movably supports the Tongrel 3. The floor plate 6 is a plate-like metal fitting that slidably supports the bottom surface of the bottom of the Tongrel 3, and is attached and fixed on a branch sleeper 7 that supports the branching device 1.

  The branch sleeper 7 is a support (support) that supports the branching device 1, and is a synthetic sleeper made of synthetic resin or the like used for the branching unit. The tie plate 8 is a member inserted between the branch sleeper 7 and the basic rail 4, and is a plate-like metal fitting that is fixed to the branch sleeper 7 by a dog nail not shown. The rail fastening device 9 is a device for fastening the basic rail 4 to the tie plate 8. The movement prevention plate 10 is a member that prevents the branch sleeper 7 from moving, and is an angle member that connects the branch sleeper 7 so as to prevent the branch sleeper 7 from moving in the track length direction.

  The attachment structure 11 shown in FIG. 2 is a structure in which the point guard 12 is attached to the attachment member 13 by the fastening member 14. As shown in FIG. 2, the attachment structure 11 includes a point guard 12, an attachment member 13, a fastening member 14, an adjustment washer 17, a spherical washer 18, a washer 19, and the like. In the attachment structure 11, the point guard 12 and the attachment member 13 are fastened by a fastening member 14, and the point guard 12 is detachably fixed on the floor plate 6 of the branching device 1 by the attachment member 13.

  The point guard 12 shown in FIGS. 1 to 5 is a member that prevents wear of the point portion 2 of the branching device 1, and is attached to the floor plate 6 of the branching device 1 by an attachment member 13. As shown in FIG. 2, the point guard 12 has a predetermined interval (flangeway width) W so as to form a gap (flangeway) through which the wheel can pass between the side surface of the head of the basic rail 4. Opened and installed at the point 2 of the branching device 1. The point guard 12 prevents side wear at the front end portion of the tongrel 3 that occurs when the wheel passes through the point portion 2 and prevents derailment of the wheel. As shown in FIGS. 2 and 5, the point guard 12 is a plate-like member having a substantially L-shaped cross-section, and is heat-treated if necessary depending on the material. As shown in A), the central portion is wide, and the width gradually decreases from the central portion toward both ends. As shown in FIGS. 1 and 2, the point guard 12 is arranged so as to cover the tip of the Tongrel 3 and as shown in FIG. 2, the Tongrel 3 changes in the direction indicated by the two-dot chain line in the drawing. A space is formed between the floor plate 6 so as to be operable. The point guard 12 includes a guard portion (front portion) 12a, a mounting portion (rear portion) 12b shown in FIGS. 1, 2, 3A, and 5, an opening portion 12c shown in FIG. (B), the through-hole 12d shown in FIG. 4 and FIG. 5, and the latching part 12e are provided.

The guard part 12a shown in FIG.1 and FIG.2 is a part facing the rail head part of the basic rail 4. As shown in FIG. As shown in FIG. 1, the guard part 12a protrudes toward the rail head side of the basic rail 4, and is formed in a convex shape. As shown in FIG. 3A, the flat surface 12f and the inclined surfaces 12g, 12h, etc. It has. The flat surface 12f is a linear plane parallel to the basic rail 4 and is formed at the central portion of the guard portion 12a. The inclined surface 12g is a plane which is inclined linearly at an inclination angle theta ₁ with respect to the base rail 4 are formed on both end portions of the guard portion 12a. The inclined surface 12h is a flat surface inclined linearly with respect to the basic rail 4 at an inclination angle θ ₂ (θ ₁ > θ ₂ ), and is formed between the central portion and both end portions of the guard portion 12a.

  The attachment part 12b shown in FIGS. 1 and 2 is a part attached to the attachment member 13. The attachment portion 12b is formed on the side opposite to the guard portion 12a, and is formed by bending in an approximately L shape as shown in FIGS. The attachment portion 12b includes a flat surface 12i attached to the convex curved surface 13d of the attachment member 13. The flat surface 12i is attached to the conventional point guard 104 shown in FIG. 13 as shown in FIG. Unlike the portion 104b, it is formed in a straight line.

  The opening 12c shown in FIG. 1 and FIG. 3 (A) is a confirmation hole for maintenance and inspection, and an operator confirms the connecting portion between the tongrel 3 and the rolling rod 5 from above when performing maintenance and inspection. It is formed through this point guard 12 as possible. Two openings 12 c are formed in a square shape at the center of the point guard 12.

  The through holes 12d shown in FIGS. 3B, 4 and 5 are holes through which the fastening bolts 15 pass. As shown in FIG. 5, the through-hole 12d is formed through the attachment portion 12b. As shown in FIG. 4, the through-hole 12d is a substantially elliptical long hole that is long in the thickness direction (vertical direction) of the point guard 12. is there.

  3B, 4 and 5, the latching portion 12e is a portion for latching the bolt head portion 15a of the fastening bolt 15. As shown in FIG. When the fastening bolt 15 is inserted into the through holes 12d and 13b and the fastening bolt 15 is rotated around the bolt axis and pulled in the direction opposite to the insertion direction, the latch head 12e is hung by the bolt head 15a. Stopped. As shown in FIG. 3, the latching portion 12e is formed on the surface opposite to the flat surface 12i of the mounting portion 12b, and the length direction (lateral direction) of the point guard 12 is shown in FIGS. Direction). As shown in FIG. 5, the latching portion 12e is a groove formed with a depth that allows the bolt head portion 15a to be latched.

6 is an external view of an attachment member of the point guard attachment structure according to the embodiment of the present invention, FIG. 6 (A) is a plan view, FIG. 6 (B) is a front view, and FIG. C) is a left side view, and FIG. 6D is a right side view.
The attachment member 13 shown in FIGS. 1, 2, and 6 is a member that attaches the point guard 12 to the floor plate 6 of the branching device 1. The attachment member 13 is attached and fixed on the floor plate 6 by welding or the like so as to rise from the floor plate 6, and supports the attachment portion 12b of the point guard 12 as shown in FIG. As shown in FIG. 1, the attachment member 13 supports the attachment portions 12 b of the point guard 12 at a plurality of locations at predetermined intervals in the length direction. As shown in FIG. 6, the attachment member 13 includes an attachment portion 13a, a through hole 13b, a spherical surface portion 13c, and the like.

  2 and 6 is a portion to which the point guard 12 is attached. The mounting portion 13a includes a convex curved surface 13d for mounting the flat surface 12i of the point guard 12, a support surface 13e that contacts the lower surface of the point guard 12 on the mounting portion 12b side, and supports the lower surface. As shown in FIG. 6A, the curved surface 13d is formed in a curved shape having a radius R (for example, a curved surface having a radius of about 600 mm) unlike the mounting portion 105a of the conventional mounting member 105 shown in FIG.

  2 and 6 is a hole through which the fastening bolt 15 passes. The through hole 13b is formed through the attachment portion 13a, and is a long hole having the same shape as the through hole 12d shown in FIGS.

  The spherical surface portion 13 c shown in FIGS. 2 and 6 is a portion that contacts the spherical surface portion 18 a of the spherical washer 18. The spherical portion 13c is a spherical seat formed in the through hole 13b of the mounting member 13, and is a concave spherical surface formed in the opening of the through hole 13b on the side opposite to the mounting portion 13a. The spherical portion 13 c is in close contact with the spherical portion 18 a of the spherical washer 18 and positions the spherical washer 18 on the mounting member 13.

7 is an external view of a fastening member of the point guard mounting structure according to the embodiment of the present invention, FIG. 7 (A) is a front view, FIG. 7 (B) is a left side view, and FIG. (C) is a right side view.
The fastening member 14 shown in FIG. 2 is a member that fastens the point guard 12 to the mounting member 13 and includes a fastening bolt 15 and fastening nuts 16a and 16b. The fastening member 14 is fastened by a fastening bolt 15 and fastening nuts 16a and 16b so that the attachment portion 12b of the point guard 12 and the attachment portion 13a of the attachment member 13 are detachably connected.

  The fastening bolt 15 shown in FIGS. 2 and 7 is a member that is inserted into the through hole 12 d of the point guard 12 and the through hole 13 b of the attachment member 13. As shown in FIG. 7, the fastening bolt 15 includes a bolt head portion 15a, a male screw portion 15b, an indicator portion 15c, and the like, and the bolt head portion 15a is a T-shaped T bolt. Unlike the conventional fastening bolt 109 shown in FIG. 13, the fastening bolt 15 inserts a bolt head 15a into the through holes 12d and 13b from the mounting member 13 toward the point guard 12 as shown by a two-dot chain line in FIG. Then, the point guard 12 and the attachment member 13 are fastened. When the fastening bolt 15 is rotated around the bolt axis while being inserted into the through holes 12d and 13d, the bolt head portion 15a is latched to the latching portion 12e of the point guard 12.

  The bolt head portion 15a is a portion that passes through the through holes 12d and 13b and is latched to the latching portion 12e. As shown in FIG. 7B, the bolt head portion 15a is formed in substantially the same shape as the through hole 12d shown in FIG. 4, and is slightly smaller than the through hole 12d so as to pass through the through hole 12d. Is formed. The male screw portion 15b shown in FIGS. 7A and 7C is a portion that meshes with the fastening nuts 16a and 16b shown in FIG. 2, and is opposite to the bolt head 15a of the fastening bolt 15 as shown in FIG. It is formed at the end of the side.

  The indicator portion 15c shown in FIG. 7C is a portion for confirming the rotational position where the bolt head portion 15a is latched to the latch portion 12e. The indicator portion 15c is a straight groove for confirming the mounting direction formed at the end of the fastening bolt 15 on the male screw portion 15b side, and as shown in FIGS. 7B and 7C, the bolt head portion 15a has a wide direction. And are formed so as to be orthogonal to the direction of the groove.

FIG. 8 is a cross-sectional view of the fastening nut of the point guard mounting structure according to the embodiment of the present invention, FIG. 8 (A) is a cross-sectional view showing a state before fastening, and FIG. 8 (B) is after fastening. It is sectional drawing which shows this state.
The fastening nuts 16 a and 16 b shown in FIGS. 2 and 8 are members that are attached to the male screw portion 15 b of the fastening bolt 15 and fasten the point guard 12 to the mounting member 13. The fastening nuts 16a and 16b are nuts having a detent function, and are provided with a female screw portion 16c and a locking portion 16d. The female screw portion 16 c is a portion that meshes with the male screw portion 15 b of the fastening bolt 15.

  The loosening prevention portion 16d is a portion that prevents the fastening bolt 15 from loosening. As shown in FIG. 8, the locking portion 16d includes a tapered concave portion 16e formed on the lower surface of the fastening nut 16a and a tapered convex portion formed on the upper surface of the fastening nut 16b and decentered from the center of the fastening nut 16b. 16f. The locking portion 16d causes the concave portion 16e and the convex portion 16f to frictionally contact each other by tightening the fastening nuts 16a and 16b. For example, the locking portion 16d is configured such that, by tightening the upper fastening nut 16a after tightening the lower fastening nut 16b, the convex portion 16f acts as a wedge with respect to the recessed portion 16e, and the female screw portion 16c of the fastening nut 16a The frictional force between the fastening bolt 15 and the external thread portion 15b is increased to prevent the fastening nut 16a from loosening.

  FIG. 9 is an external view of an adjustment washer for a point guard mounting structure according to an embodiment of the present invention, FIG. 9 (A) is a plan view, and FIG. 9 (B) is a right side view. FIG. 10 is a plan view for schematically explaining the function of the adjustment washer of the point guard mounting structure according to the embodiment of the present invention, and FIG. 10 (A) is a plan view when the point guard is retracted. FIG. 10B is a plan view when the point guard is advanced.

  The adjustment washer 17 shown in FIGS. 2, 9, and 10 is a member that adjusts the attachment posture of the point guard 12 with respect to the attachment member 13. As shown in FIGS. 2 and 10, the adjustment washer 17 is inserted between the attachment member 13 and the fastening nut 16b in a state where the fastening bolt 15 is inserted into the through holes 12d and 13b. It can be attached to. For example, as shown in FIG. 10A, the adjustment washer 17 is inserted between the spherical washer 18 and the washer 19 to retract the point guard 12 from the basic rail 4 with respect to the mounting member 13. Further, as shown in FIGS. 2 and 10, the adjustment washer 17 is inserted between the point guard 12 and the mounting member 13 with the fastening bolt 15 inserted in the through holes 12d and 13b. It can be attached to the bolt 15. For example, as shown in FIG. 10B, the adjustment washer 17 is inserted between the flat surface 12 i of the point guard 12 and the curved surface 13 d of the attachment member 13, and the point guard 12 is attached to the attachment member 13. Advance toward the basic rail 4. As shown in FIG. 9, the adjustment washer 17 is a plate-like member having a rectangular shape, and there are several types having different plate thicknesses. An arbitrary thickness is selected and attached to the fastening bolt 15. As shown in FIG. 10, the flange way width W is adjusted to a specified value. The adjustment washer 17 includes a notch 17a as shown in FIG.

  A notch 17a shown in FIG. 9 is a part for mounting the adjusting washer 17 on the fastening bolt 15 from a direction (lateral direction) orthogonal to the axial direction of the fastening bolt 15. As shown in FIG. 9A, the notch 17a is a groove formed from one side of the adjustment washer 17 toward the center, and the outer shape of the bolt shaft so that the bolt shaft of the fastening bolt 15 can pass therethrough. The width is slightly wider than that.

FIG. 11 is a plan view for schematically explaining the function of the spherical washer of the point guard mounting structure according to the embodiment of the present invention.
The spherical washer 18 shown in FIGS. 2, 10, and 11 is a member that is sandwiched between the attachment member 13 and the fastening nut 16b. For example, as shown in FIGS. 10 and 11, the spherical washer 18 is sandwiched between the spherical portion 13 c of the attachment member 13 and the adjustment washer 17. The spherical washer 18 includes a spherical surface portion 18a that comes into contact with the spherical surface portion 13c, and the spherical surface portion 18a is a convex spherical surface formed on the surface that comes into contact with the spherical surface portion 13c. For example, as shown in FIG. 11, the spherical washer 18 has a spherical surface so that the fastening nut 16 b or the washer 19 and the spherical washer 18 are in close contact with each other when the point guard 12 is tilted with respect to the mounting member 13. The spherical surface portion 18a rotates with respect to the portion 13c.

  The washer 19 shown in FIGS. 2, 10, and 11 is a member that is sandwiched between the spherical washer 18 and the fastening nut 16b. The washer 19 is, for example, a flat washer. As shown in FIGS. 10 and 11, when the adjusting washer 17 is sandwiched between the spherical washer 18 and the fastening nut 16b, the adjusting washer 17 and the fastening nut are disposed. 16b.

Next, an assembling method of the point guard mounting structure according to the embodiment of the present invention will be described.
The point guard 12 is moved up and down by a lifting device (not shown), and the lower surface of the point guard 12 is placed on the support surface 13e of the mounting member 13 as shown in FIG. 2, and the mounting portion 12b of the point guard 12 and the mounting portion of the mounting member 13 are mounted. 13a is brought into contact. As indicated by a two-dot chain line in the drawing, the fastening bolt 15 is inserted from the through hole 13 b of the attachment member 13 toward the through hole 12 d of the point guard 12 with the bolt head portion 15 a of the fastening bolt 15 as the tip. After inserting the fastening bolt 15 until the bolt head 15a protrudes from the through hole 12d shown in FIG. 2, the indicator portion 15c of the fastening bolt 15 shown in FIG. The fastening bolt 15 is rotated around the bolt axis until it changes by 90 degrees. As a result, the width direction of the bolt head portion 15a shown in FIG. 7B and the length direction of the latching portion 12e of the point guard 12 shown in FIG. When pulled toward the opposite side, the bolt head portion 15a is fitted and positioned in the latching portion 12e as shown in FIG. In this state, the spherical washer 18, the washer 19, the fastening nut 16b, and the fastening nut 16a are attached to the fastening bolt 15 from the male screw portion 15b side of the fastening bolt 15, and the spherical portion 18a of the spherical washer 18 and the mounting member 13 are attached. The fastening nuts 16a and 16b are temporarily tightened until the spherical portion 13c comes into contact.

  Next, as shown in FIG. 10A, between the spherical washer 18 and the washer 19, and between the flat surface 12i of the point guard 12 and the curved surface 13d of the mounting member 13 as shown in FIG. Then, an adjustment washer 17 having an optimum thickness is selected and inserted. At this time, with the fastening member 14 slightly loosened, the notch 17a of the adjusting washer 17 shown in FIG. 9 is inserted from the lateral direction with respect to the bolt axial direction of the fastening bolt 15. For this reason, the adjustment washer 17 is attached to the fastening bolt 15 with the fastening bolt 15 attached without removing the fastening bolt 15 from the through holes 12d and 13b, and the flange way width W shown in FIG. Is done. Next, when the fastening nut 16a is tightened after tightening the fastening nut 16b shown in FIG. The looseness between the male screw portion 15b and the female screw portion 16c is prevented. As shown in FIG. 1, when the wheel repeatedly passes through the point portion 2 of the branching device 1 after the point guard 12 is attached to the attachment member 13, the guard portion 12 a of the point guard 12 and the rail head side surface of the basic rail 4. Wears and the flange way width W shown in FIG. 2 changes. In this case, the flange way width W is specified by replacing the adjustment washer 17 with the optimum thickness by the same procedure as in assembly, or by newly installing the adjustment washer 17 with the optimum thickness. Readjusted to the value.

  For example, when the guard portion 12a of the point guard 12 is worn, the point guard 12 may be attached to the attachment member 13 obliquely as shown in FIG. 11 in order to adjust the flange way width W to a specified value. . For this reason, depending on the mounting state of the adjustment washer 17 on the five attachment structures 11 shown in FIG. 1, the attachment posture of the point guard 12 with respect to the attachment member 13 is inclined and the fastening bolt 15 is also inclined as shown in FIG. Sometimes. For example, when the spherical surface portion 13c of the mounting member 13 and the spherical surface portion 18a of the spherical washer 18 shown in FIG. 11 do not exist, when the fastening member 14 is fastened, the surface pressure of the seating surface of the fastening nut 16b becomes non-uniform. An eccentric load acts on the fastening bolt 15, and a bending stress acts on the fastening bolt 15. However, as shown in FIG. 12, when the mounting posture of the point guard 12 is inclined, the spherical portion 18a rotates with the spherical portion 13c in contact with the spherical portion 13c substantially uniformly. For this reason, the surface pressure between the seat surface of the fastening nut 16b and the washer 19 becomes substantially uniform, the eccentric load acting on the fastening bolt 15 is reduced, and the bending stress is also reduced.

The point guard mounting structure according to the embodiment of the present invention has the following effects.
(1) In this embodiment, the bolt head 15a is inserted into the through holes 12d and 13b from the attachment member 13 toward the point guard 12, and the fastening bolt 15 fastens the point guard 12 and the attachment member 13. For this reason, unlike the conventional attachment structure of the point guard 104 as shown in FIG. 13, the fastening bolt 15 can be inserted and fastened from the attachment member 13 side to the point guard 12 side. As a result, the work efficiency at the time of attaching the point guard 12 or at the time of maintenance inspection for adjusting the flange way width W can be improved, and these work can be facilitated and labor saving can be achieved.

(2) In this embodiment, when the fastening bolt 15 is rotated around the bolt axis while being inserted into the through holes 12d and 13b, the bolt head portion 15a is latched to the latching portion 12e of the point guard 12. . For this reason, the bolt head portion 15a is accurately positioned on the latching portion 12e, and the fastening bolt 15 is prevented from coming out of the through holes 12d and 13e, so that the fastening operation can be easily performed.

(3) In this embodiment, the fastening bolt 15 includes the indicator portion 15c for confirming the rotational position where the bolt head portion 15a is latched to the latch portion 12e. As a result, the rotational position where the bolt head portion 15a is latched to the latching portion 12e can be easily confirmed visually, so that the workability at the time of fastening can be improved.

(4) In this embodiment, the fastening nuts 16 a and 16 b are attached to the fastening bolt 15, and the locking portions 16 d of the fastening nuts 16 a and 16 b prevent the fastening bolt 15 from loosening. For this reason, the fastening bolt 15 and the fastening nuts 16a and 16b are loosened, and the fluctuation of the flange way width W can be suppressed, and labor saving of maintenance and inspection work can be achieved.

(5) In this embodiment, a bolt head 15 a uses a T-shaped T-bolt as the fastening bolt 15. For this reason, the point guard 12 can be easily fastened to the mounting member 13 by the fastening bolt 15 having a simple and inexpensive structure.

The present invention is not limited to the embodiment described above, and various modifications or changes can be made as described below, and these are also within the scope of the present invention.
For example, in this embodiment, the case where the fastening bolt 15 is a T bolt has been described as an example. However, an L-shaped hook bolt that can be hooked on the hooking portion 12e on the point guard 12 side is used as the fastening bolt 15. It can also be used as Further, in this embodiment, the case where the branching device 1 is an inner branching device has been described as an example, but the point guard attached to the outer branching device in which the branching line branches off the curve from the reference line. The present invention can also be applied.

It is a top view which shows the installation state of the point guard in the attachment structure of the point guard which concerns on embodiment of this invention. It is sectional drawing which shows the state cut | disconnected by the II-II line | wire of FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the point guard in the attachment structure of the point guard which concerns on embodiment of this invention, (A) is a top view, (B) is the front view seen from the IIIB direction of (A). It is a front view which expands and shows IV part of FIG. 3 (B). It is sectional drawing which shows the state cut | disconnected by the VV line | wire of FIG. It is an external view of the attachment member of the attachment structure of the point guard which concerns on embodiment of this invention, (A) is a top view, (B) is a front view, (C) is a left view, D) is a right side view. It is an external view of the fastening member of the attachment structure of the point guard which concerns on embodiment of this invention, (A) is a front view, (B) is a left view, (C) is a right view. It is sectional drawing of the fastening nut of the attachment structure of the point guard which concerns on embodiment of this invention, (A) is sectional drawing which shows the state before fastening, (B) is sectional drawing which shows the state after fastening. . It is an external view of the washer for adjustment of the attachment structure of the point guard which concerns on embodiment of this invention, (A) is a top view, (B) is a right view. It is a top view for demonstrating the function of the washer for adjustment of the attachment structure of the point guard which concerns on embodiment of this invention typically, (A) is a top view when a point guard is retracted, (B ) Is a plan view when the point guard is advanced. It is a top view for demonstrating typically the function of the spherical washer of the attachment structure of the point guard which concerns on embodiment of this invention. It is a top view which shows roughly the installation state of the conventional point guard. It is sectional drawing which shows the attachment structure of the conventional point guard.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Branch device 2 Point part 3 Tongue rail 4 Basic rail 6 Floor board 11 Attachment structure 12 Point guard 12a Guard part 12b Attachment part 12d Through-hole 12e Latch part 13 Attachment member 13a Attachment part 13b Through-hole 14 Fastening member 15 Fastening bolt 15a Bolt Head 15c Index section 16a, 16b Fastening nut 16d Loosening prevention section W Flange way

Claims (5)

A point guard mounting structure in which a point guard for preventing wear of a point portion of a turnout is attached to a mounting member by a fastening member,
The fastening member includes a bolt that inserts a bolt head into a through hole from the attachment member toward the point guard, and fastens the point guard and the attachment member;
Point guard mounting structure characterized by In the point guard mounting structure according to claim 1,
The bolt head is latched to the latching portion of the point guard when the fastening bolt is rotated around the bolt axis while being inserted into the through hole;
Point guard mounting structure characterized by In the point guard mounting structure according to claim 2,
The fastening bolt includes an indicator for confirming a rotational position at which the bolt head is latched to the latch;
Point guard mounting structure characterized by In the point guard mounting structure according to any one of claims 1 to 3,
The fastening member includes a fastening nut attached to the fastening bolt,
The fastening nut includes a locking portion for preventing the fastening bolt from loosening;
Point guard mounting structure characterized by In the point guard mounting structure according to any one of claims 1 to 4,
The fastening bolt is a T-bolt having a T-shaped bolt head;
Point guard mounting structure characterized by

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