JP5225897B2 - Rail fall prevention device - Google Patents

Description

  In the present invention, a support piece is erected on a frame that is detachably fastened to a sleeper (directly or indirectly), and a pressure receiving rod is assembled to a cylindrical body that is laid horizontally on the upper end of the support piece. The rail overturn preventer is provided with a trochanter in contact with the side surface of the rail on the sleeper at the tip of the pressure receiving rod so as to prevent the rail from overturning by receiving a load in the rail overturning direction during the rail setting change operation. It is about.

  The fall prevention device having the above-described configuration is fixedly disposed at an appropriate position in the longitudinal direction of the rail (especially in the vicinity of the curved portion of the rail) in order to prevent the rail from falling due to the tension of the tensioner when the rail is changed. A roller (rolling wheel), which is a trochanter, is brought into contact with the side surface of the rail to receive a load in the rail overturning direction, and copes with a movement in the longitudinal direction of the rail due to a tension operation (for example, Patent Document 1). .

Japanese Patent No. 2754425

  The conventional structure has no problem when the rail moves (extends) in the longitudinal direction due to the tensioning operation of the tensioner. However, when the tensioning operation is performed, a force in the vertical direction (height direction) is applied to the rail. When a load is applied, an external force in a direction crossing the rotation direction is applied to the rotating roller, and as a result, even if there is no problem in preventing the rail from overturning, the roller tread does not touch the side of the rail. Rubbing can cause significant damage to the rail.

  The present invention pays attention to such a normal situation and copes with the movement of the rail in the longitudinal direction and the vertical direction during the rail tensioning operation for changing the setting of the rail to prevent the rail from overturning, as well as damaging the rail. It was invented to provide a rail fall-prevention device that would not be given.

  A support piece is erected on a frame that is detachably fixed to a sleeper, and a pressure receiving rod that receives the load of the rail is assembled to a cylindrical body that is laid horizontally on the upper end of the support piece, and is attached to the tip of the pressure receiving rod. The pressure receiving element that rolls in contact with the side surface of the rail on the sleeper is held, and the pressure receiving element is constituted by a sphere, and the basic means includes a sphere holding means, A holding hole having a spherical inner wall is provided at the tip of the pressure receiving rod, and a specific holding means is provided to hold the sphere in a freely protruding manner in the holding hole. Thus, it is possible to provide a rail overturn preventer that does not damage the side surface of the rail by causing the sphere to roll smoothly.

  According to the present invention, the sphere rolls in response to the load of the rail regardless of whether the rail moves in the longitudinal (lateral) direction or the height (vertical) direction along with the tension by the tensioner. Therefore, the rail can be prevented from overturning without being damaged by the contact of the spherical body that is the pressure receiver of the rail.

  Also, since the sphere is held in a holding hole having a spherical back wall, the sphere can smoothly roll in response to the pressure contact of the rail, and the tensioning operation of the rail can be performed without any trouble. .

Partially missing side view. FIG. 2 is a partially broken plan view of FIG. 1. The perspective view of a pressure receiving rod. The partial expanded sectional view of a receiving pressure rod. The top view of the state installed in the rail.

  The drawings show an embodiment of the rail overturn preventer according to the present invention. In the figure, A is an overturn preventer, and the overturn preventer A is a frame 1 in which leg pieces 1b and 1b are provided relative to each other on both sides of the upper piece 1a. A support piece 2 is erected on the upper piece 1a, and a sphere 4 that is in contact with the side (abdominal) surface Ra of the rail R at the tip is rollable on a cylindrical body 3 that is horizontally provided at the upper end of the support piece 2. The held pressure receiving rod 5 is assembled, and this pressure receiving rod 5 is pressed by a tightening bolt 7 screwed with a nut member 3a provided on the cylindrical body 3, so that the contact state with respect to the side surface Ra of the spherical body 4 is maintained. It is designed to receive that load.

  Then, any one of the upper and lower step portions 8, 8 ′ provided at the lower edges of the leg pieces 1b, 1b of the underframe 1 is received by the receiving portion 9 or 9 ′ provided in the sleeper (PC sleeper) b, The step (8, 8 'is provided on the lower edge of the leg piece 1b so that one of them is locked to the receiving part 9 or 9' provided on the sleeper b). A fixing bolt 11 is inserted from above into a notch 10 provided at the center front end of the upper piece 1a, screwed into a bolt hole 20 provided in the sleeper b, and tightened to fix the frame 1 to the sleeper b. The tip of the adjustment bolt 7 screwed to the rear end side of the cylinder 3 is brought into contact with the rear end of the pressure receiving rod 5 fitted to the cylinder 3 laid horizontally from the front end side, and the adjustment bolt 7 is tightened. Then, the sphere 4 provided at the tip of the pressure receiving rod 5 is advanced, and the sphere 4 is brought into contact with the rail side surface Ra to set the receiving state position (the set position is screwed in the cylinder 3 in the radial direction). The front end of the pressure receiving rod 5 is recessed relative to the side surface in the axial direction, and the tightening screw 22 is engaged with one of the guide grooves 12a and 12a communicating with each other by the peripheral groove 12b at the rear end. So that the rail R is prevented from turning back.

  The pressure receiving rod 5 is provided with an eccentric plate 14 at the tip of a rod main body 13A provided with the grooves 12a and 12b, and the eccentric plate 14 is provided with a holding rod 15 eccentric with the rod main body 13A. 15 is provided with a holding hole 16 having a back wall 16a having a spherical shape, and the spherical body 4 is fitted to the holding hole 16 so as to be able to roll so that a part thereof protrudes from the holding hole 16. A first ring 18 is fitted into a circumferential groove 17 provided on the inner wall of the opening end side of the hole 16 so as to be prevented from being detached from the holding hole 16 (this holding means is limited to the structure of the embodiment). There is no need to do so. In short, it is only necessary to hold the sphere 4 so that it can roll so that a part of the tip of the holding rod protrudes.

  The holding rod 15 holding the sphere 4 is eccentric with respect to the rod main body 13A because the ball 4 at the tip of the holding rod 15 protruding from the eccentric plate 14 provided at the tip of the rod main body 13A is attached to the rail R. The pressure receiving rod 5 is inverted in the cylindrical body 3 using the guide groove 12a and the circumferential groove 12b so as to correspond to the type (in the case of the embodiment, either 50 kgN or 60 kg rail). In order to obtain a structure in which the position of the sphere 4 can be selected, and the structure can be applied to both 50 kgN and 60 kg rails with different heights by one type of rail fall prevention device to prevent the rail from falling. (This point is publicly known).

  However, in implementing the present invention, it is not limited to 50 kgN and 60 kg rails, and there is no inconvenience even if a sphere is arranged so as to be compatible with other types of rails and applied to the other types of rails. Of course.

1 frame 2 support piece 3 cylinder 4 sphere 5 pressure receiving rod 16 holding hole 16a back wall b sleeper R rail Ra rail side

Claims (2)

  A support piece is erected on a frame that is detachably fixed to a sleeper, and a pressure receiving rod that receives the load of the rail is assembled to a cylindrical body that is laid horizontally on the upper end of the support piece, and is attached to the tip of the pressure receiving rod. A rail overturn preventer comprising a pressure receiver that rolls in contact with a side surface of the rail on the sleeper, and the pressure receiver is formed of a spherical body.   The rail overturn preventer according to claim 1, wherein a holding hole having a spherical inner wall is provided at a tip of the pressure receiving rod, and a sphere is rotatably held in the holding hole.

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