JP2012107434A - Branching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branching device which is excellent in durability and is capable of reducing energy consumption when shifting a track.SOLUTION: Since the branching device includes a base part 4 where respective ends of movable girders B1 and B2 are loaded, a plurality of wheels 3 for supporting the base part 4 and rolling on a laid traveling rail 2, a driving device 5 for driving the wheels 3, a guide rail 6 laid along the traveling rail 2, and a guide part 7 respectively abutted to both side faces of the guide rail 6, even when a horizontal load is transmitted from the movable girders B1 and B2 to the base part 4, the base part 4 and the wheels 3 are prevented from shifting in the lateral direction. Also, since the wheels 3 and the guide part 7 in a structure corresponding to an acting load are provided separately, the guide part 7 and the traveling rail 2 are not entangled, torque required by the driving device 5 is leveled and miniaturized, a peak load is reduced, the energy consumption is reduced, and the durability is improved further without wearing the guide part 7 as the wheels 3 are rotated.

Description

  The present invention relates to a branching device, and more particularly to a branching device that has excellent durability and can reduce energy consumption when changing a track.

  As a mechanism for branching tracks and tracks and selecting the course of a vehicle (train), a carriage equipped with two movable girders connected by vertical axes adjacent to each other in the girder length direction, and moving the movable girder horizontally when changing the track A branching device including a fluid pressure cylinder (hydraulic cylinder) is disclosed (Patent Document 1). In the technique disclosed in Patent Document 1, the movable girder mounted on the carriage can be moved horizontally by extending and contracting the fluid pressure cylinder, and as a result, the track can be changed.

  However, since the load in the girder length direction (horizontal load) transmitted from the movable girder when changing the trajectory acts as a bending load on the piston rod of the hydraulic cylinder, an excessive force is applied to the seal part of the hydraulic cylinder. In addition, there is a problem that a failure such as leakage of a fluid that transmits pressure is likely to occur, and the life of the fluid pressure cylinder is shortened.

  As another method, a technique disclosed in Patent Document 2 is known. The technique disclosed in Patent Document 2 is to mount a motor and a speed reducer for driving wheels on a carriage so that the carriage can run on a rail. Since the carriage moves on the rail and moves the movable beam mounted on the carriage, the fluid pressure cylinder disclosed in Patent Document 1 can be made unnecessary. In this case, when a horizontal load in the horizontal direction is input to the carriage, the wheels may slip and the position of the carriage may be shifted in the lateral direction. Since the lower end of the vertical shaft that connects the movable girders is pivotally supported by the carriage, if the position of the carriage is shifted laterally, a horizontal load acts on the vertical axis and the vertical axis is damaged, or the life of the vertical axis May be shortened.

  Therefore, in the technique described in Patent Document 2, a flange is attached to the wheel. When a horizontal load is input to the carriage, the flange comes into contact with the side surface of the rail to prevent the wheels from slipping.

Japanese Patent No. 2939377 (FIGS. 1-4, etc.) Japanese Patent Laid-Open No. 59-6673 (FIG. 13 etc.)

  However, when the vehicle traveling on the track is braked in the vicinity of the movable girder, the movable girder moves in the traveling direction of the vehicle by the reaction force, and a horizontal horizontal load intersecting the rail is transmitted from the movable girder to the carriage. Similarly, when changing the track, the horizontal load is transmitted from the movable beam to the carriage. When the horizontal load is transmitted to the carriage in this way, the wheels are displaced in the width direction of the rail, so that the side surface of the rail and the flange are twisted. If the rail and the flange are twisted, smooth rotation of the wheel at the start of the track change is hindered when the track is changed. In order to rotate the wheels against this, a large torque is required for the motor, which increases the size of the motor, increases the peak load, and increases the energy consumption for driving the motor. .

  Also, if the wheel is rotated while the rail and flange are twisted, the flange rubs while pressing the side of the rail, so the side of the flange wears quickly and the durability of the carriage, especially the wheel, decreases. There was a point.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a branching device that is excellent in durability and can reduce energy consumption when changing a track.

Means for Solving the Problems and Effects of the Invention

  In order to achieve this object, a branching device according to claim 1 is provided with a base portion on which ends of two adjacent movable girders are mounted while being rotatably connected around a vertical axis, and the base portion. A plurality of wheels that roll on the laid traveling rail, and a drive device that drives the wheel, and a guide rail that is laid along the traveling rail, The guide portion is provided with a guide portion that is in contact with both side surfaces of the guide rail and is provided separately from the wheel. Thus, the branching device according to claim 1 can prevent the platform and the wheels from shifting in the lateral direction even when a horizontal load in the lateral direction intersecting the traveling rail is transmitted from the movable girder to the platform. In addition, since the wheel and the guide part are provided separately, the traveling rail and the guide part are not twisted, so that the rotation of the wheel is not hindered when the track is changed, which is necessary for the driving device. The torque can be leveled, the drive device can be downsized, and the peak load can be reduced to reduce energy consumption.

  In addition, since the wheel and the guide unit are provided separately, the guide unit is not worn as the wheel rotates when changing the track by forming a structure corresponding to the applied load. It is hard to wear and has the effect of improving durability.

  The branching device according to claim 2, wherein the guide portion includes a support shaft that is suspended from below the base portion, and one or a plurality of sets of rollers that are pivotally supported by the support shaft. The outer circumferences of the one or plural sets of rollers are in contact with both side surfaces of the guide rail. As a result, the branching device according to claim 2 can reduce the frictional resistance between the guide rail and the guide portion when changing the track in addition to the effect of the branching device according to claim 1, so that the drive device can be downsized. And the effect of further reducing energy consumption. Further, there is an effect that the wear of the guide portion can be prevented and the durability can be further improved.

  The branch device according to claim 3, wherein the base portion includes a vertical shaft fixing portion to which a lower end side of the vertical shaft is fixed, and the guide rail includes the base portion and the wheel straddled, and the vertical The extension line of the shaft passes through the inside of a polygon formed by connecting the points where the traveling rail and the wheel are in contact with each other. Thereby, in addition to the effect which the branching apparatus of Claim 1 or 2 has, the branching apparatus of Claim 3 transmitted the excessive horizontal load from a movable girder to the base part via the vertical axis | shaft fixed part. Sometimes, the pedestal can be prevented from floating around the guide rail. As a result, it is possible to prevent the guide portion from coming into contact with the guide rail, or an excessive horizontal load being input to the guide portion to damage the guide portion. Thereby, even when an excessive horizontal load is input, there is an effect that the base portion can be reliably moved along the guide rail.

  The branching device according to claim 4 is provided at an end portion of each of the two adjacent movable girders, and is configured to be rotatable about the vertical axis, and a first support portion and a second support portion, A slide hole formed in at least one of the first support part and the second support part, and through which the vertical axis is slidably mounted along a girder length direction of the movable girder. Thereby, in addition to the effect which the branching apparatus in any one of Claim 1 to 3 shows, the branching apparatus of Claim 4 can be moved relative to the vertical axis in the direction of the digit length. Therefore, the expansion / contraction of the movable girder in the longitudinal direction due to the change in the outside air temperature can be absorbed, and the horizontal load due to the expansion / contraction of the movable girder can be prevented from being transmitted to the base portion. As a result, it is possible to prevent an excessive load from being transmitted to the guide portions that are in contact with both side surfaces of the guide rail due to the expansion / contraction of the movable girders, and the durability of the guide portions can be improved. Further, since the adjacent movable girders are restricted from relative movement in the girder width direction, the movable girder can accurately follow the movement of the platform in the girder width direction, and the trajectory conversion accuracy can be improved. .

(A) is a top view which shows the reference | standard state of the branch apparatus in 1st Embodiment of this invention, (b) is a top view of the branch apparatus which shows a track change state. It is a principal part top view of a branch device. It is a front view of the branch device in the arrow III direction view of Fig.1 (a). FIG. 4 is a side view of the branching device as viewed in the direction of arrow IV in FIG. 3. It is a principal part top view of the branch apparatus in 2nd Embodiment. It is sectional drawing of the bearing mechanism comprised as an elastic bearing.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. First, an outline of the branch device 1 will be described. Fig.1 (a) is a top view which shows the reference | standard state of the branch device 1 in 1st Embodiment of this invention, FIG.1 (b) is a top view of the branch device 1 which shows a track change state. The branch device 1 is arranged on a branch track B that connects a branch start point side fixed beam A1 and a branch end point side fixed beam A2 of a reference line (main track) of a track on which a vehicle (train) (not shown) travels.

  The branch track B mainly includes a plurality of movable girders B1, B2, and B3 arranged in parallel in the girder length direction, and a vertical axis Q to which the movable girders B1, B2, and B3 are connected to each other. . The movable girders B1, B2, and B3 connected by the vertical axis Q are configured to be bendable around the vertical axes Q. The branch track B is a track for switching the course of the vehicle to reference lines A1, B, A2 or branch lines (side track) A1, B, C. The branch trajectory B moves while being bent around each vertical axis Q with the vertical axis P connecting the branch start point side fixed beam A1 and the movable beam B1 as a fixed fulcrum. A reference state (see FIG. 1A) in which the branch end side end (end of the movable beam B3) is connected to the branch end side fixed beam A2, and the branch end side end of the branch track B (of the movable beam B3). The trajectory switching state (see FIG. 1 (b)) in which the end portion is connected to the base end side fixed beam C is switched.

  The branch device 1 is a mechanism that moves the branch track B by moving the movable girders B1, B2, and B3. The branching device 1 is supported by the wheels 3 that roll on a pair of traveling rails 2 laid on the roadbed, and each of the two adjacent movable girders B1, B2, and B3. It is mainly provided with a base part 4 on which the end part is mounted. In the present embodiment, the traveling rail 2 is formed in a straight line, and is laid at a plurality of locations corresponding to the end portions of the movable girders B1, B2, and B3 connected to each other by the vertical axis Q.

  The traveling rail 2 is a member on which the wheel 3 of the branching device 1 rolls and supports the vertical load by the movable girders B1, B2, B3 and the base part 4. The traveling rails 2 laid at a plurality of locations on the branch track B are formed so as to become longer as they approach the branch end side fixed beam A2. This is because the branch track B moves using the vertical axis P as a fixed fulcrum, so that the movable distance of the platform 4, that is, the length of the traveling rail 2 needs to be increased according to the travel distance of the branch track B.

  Next, the branch device 1 will be further described with reference to FIG. FIG. 2 is a plan view of an essential part of the branching device 1 on which the movable girders B1 and B2 are mounted. 2 shows a state where the movable girders B1 and B2 and the base portion 4 are seen through, and the movable girders B1 and B2 and the base portion 4 are illustrated by imaginary lines (two-dot chain lines) and are shown below the base portion 4. Is shown by a solid line. Moreover, in FIG. 2, illustration of the longitudinal direction of the running rail 2 and the guide rail 6 is partially omitted.

  As described above, the branch device 1 is supported by the plurality of wheels 3 rolling on the pair of traveling rails 2 and the ends of the two adjacent movable girders B1 and B2. Is mainly provided with a base portion 4 on which is mounted. Further, the branching device 1 includes a driving device 5 for driving the wheels 3, guide rails 6 laid along the traveling rails 2, and abuts on both side surfaces of the guide rails 6, and is provided separately from the wheels 3 on the base 4. The guide part 7 is mainly provided.

  Here, the base part 4 is configured to include a first base part 4a and a second base part 4b that are rotatably connected about the vertical axis Q. The 1st base part 4a and the 2nd base part 4b are arranged in parallel by the longitudinal direction of the traveling rail 2, and each external shape is made into the rectangular shape by planar view. The upper surface of the pedestal 4 (the first pedestal 4a and the second pedestal 4b) and the lower surface of the movable girders B1 and B2 are arranged between the movable girders B1 and B2 and the pedestal 4 when the track is changed. A support mechanism 8 (described later) is provided for smoothly performing the relative motion with a small frictional resistance.

  The wheels 3 are formed with the same diameter and are fixed to both ends of the axle 3a. The axles 3a are front and rear in the movement direction of the first base part 4a and front side in the movement direction of the second base part 4b. And it is pivotally supported by the rear side so that rotation is possible respectively. One of the wheel 3 and the axle 3a disposed on each of the first base part 4a and the second base part 4b is configured to be drivable by a gear motor (motor with a speed reducer) as the driving device 5. The wheel 3 movably supports the first base part 4a and the second base part 4b by rolling on a pair of parallel running rails 2 laid in a straight line. As described above, since the wheels 3 fixed to the different axles 3a are driven using the two driving devices 5 with respect to the base portion 4, even if one of the driving devices 5 breaks down, The base 4 can be moved by driving the wheels 3 using the drive device 5.

  The guide rail 6 is laid between the pair of travel rails 2. The guide portions 7 that abut on both side surfaces of the guide rail 6 are disposed between the axles 3a of the first base portion 4a and the second base portion 4b. Each of the guide portions 7 is provided with an appropriate interval in the longitudinal direction of the guide rail 6 and includes a total of four rollers 7d each having an outer periphery in contact with both side surfaces of the guide rail 6, and the rollers 7d. Is facing the guide rail. As described above, since the branching device 1 includes the guide portions 7 that are in contact with both side surfaces of the guide rail 6, the base portion 4 can be stably moved along the guide rail 6. Moreover, since the guide part 7 is arrange | positioned at each of the 1st base part 4a and the 2nd base part 4b, the linearity of the connected 1st base part 4a and the 2nd base part 4b is securable. .

  Next, the configuration of the branching device 1 in the digit length direction will be described with reference to FIG. FIG. 3 is a front view of the branching device 1 as viewed in the direction of arrow III in FIG. In FIG. 3, in order to illustrate the guide portion 7, the illustration of the vicinity of the center in the longitudinal direction of the axle 3 a is omitted.

  As described above, the branching device 1 mainly includes a plurality of wheels 3 that roll on the traveling rails 2 laid on the roadbed G, and a base portion 4 that is supported by the wheels 3. Yes. The wheel 3 is fixed to both ends of the axle 3a, and the axle 3a is pivotally supported by left and right axle bearings 3b. Each axle bearing 3b is independently fixed to the base portion 4.

  The guide rail 6 is laid between the traveling rails 2 of the roadbed G, and the platform 4 and the wheels 3 are straddled. The outer periphery of a roller 7d as the guide portion 7 is in contact with both side surfaces of the guide rail 6. The guide portion 7 is pivotable about a shaft portion 7a suspended from the lower surface of the base portion 4 (the first base portion 4a and the second base portion 4b) toward the guide rail 6, and around the shaft portion 7a. A main body portion 7b to be fixed and two support shafts 7c extending downward from the main body portion 7b are provided, and the rollers 7d are pivotally supported by the respective support shafts 7c. Since the outer periphery of the roller 7 d is in contact with both side surfaces of the guide rail 6, the two rollers 7 d roll on both side surfaces of the guide rail 6 as the base portion 4 moves. Thereby, the base part 4 can move linearly on the traveling rail 2 along the guide rail 6. Further, since the guide portion 7 is configured to include the roller 7d that rolls on the side surface of the guide rail 6, the frictional resistance between the guide portion 7 and the guide rail 6 can be reduced, and the guide portion 7 and the guide rail can be reduced. 6 wear can be suppressed.

  The support mechanism 8 is formed of a material having a small frictional resistance such as a fluororesin and is formed in a substantially cylindrical shape, and is fixed to the upper surface of the base part 4 (first base part 4a and second base part 4b). And a slide portion 8b fixed to the lower surface of each movable beam B1, B2 while being in contact with the sliding rod 8a. The movable girders B1 and B2 are supported on the slide rod 8a and the slide portion 8b and mounted on the base portion 4. When changing the track, the upper surface of the slide rod 8a and the lower surface of the slide portion 8b are in sliding contact with each other. Thus, the movable girders B1 and B2 move smoothly.

  The movable beam B1 on the branch start point side and the movable beam B2 on the branch end point side mounted on the base part 4 by the support mechanism 8 are connected to the respective adjacent end surfaces so as to be rotatable about the vertical axis Q. 1 support part 9a and 2nd support part 9b are provided. The first support portion 9a provided on the end face of the movable beam B1 on the branch start point side includes a slide hole 9c through which the vertical axis Q is slidably inserted along the beam length direction of the movable beam B1. The lower end portion of the vertical axis Q penetrating the slide hole 9c is fixed to the base portion 4 as will be described later.

  The slide hole 9c is provided with a gap with the vertical axis Q at least on the base side of the first support portion 9a (the movable beam B1 side on the branch start point side) when the outside air temperature is low and the movable beams B1 and B2 are contracted. It is configured as follows. As a result, the movable beam B1 can be moved relative to the vertical axis Q in the direction of the beam length. Therefore, the slide hole 9c absorbs expansion of the movable beam B1 in the beam length direction due to a change in the outside air temperature. The horizontal load generated by the expansion of the movable beam B1 can be prevented from being transmitted to the base part 4 and the vertical axis Q. Similarly, when the expanded movable beam B1 contracts due to a change in the outside air temperature, the slide hole 9c is formed, so that it is possible to prevent the horizontal load from being transmitted to the base part 4 and the vertical axis Q. As a result, an excessive load is prevented from being transmitted to the guide portion 7 due to expansion / contraction of the movable girders B1 and B2, and the durability of the guide portion 7 can be improved. Further, since it is possible to prevent a horizontal load from being input to the vertical axis Q, the movable girders B1 and B2 around the vertical axis Q can be smoothly rotated and the vertical axis Q can be prevented from being damaged. . Furthermore, since the connected movable girders B1 and B2 are restricted from moving relative to each other in the girder width direction, the movable girders B1 and B2 can be accurately followed by the movement of the base 4 accompanying the rolling of the wheels 3. It is possible to improve the trajectory conversion accuracy.

  Next, the configuration of the branching device 1 in the digit width direction will be described with reference to FIG. FIG. 4 is a side view of the branching device 1 as viewed in the direction of arrow IV in FIG. In FIG. 4, the movable beam B1 on the branch start point side is not shown.

  The base part 4 (first base part 4a and second base part 4b) of the branching device 1 is fixed at the lower end of the vertical shaft Q connecting the first support part 9a (see FIG. 3) and the second support part 9b. ing. In the present embodiment, the first base part 4a and the second base part 4b are provided with a first vertical axis fixing part 10a and a second vertical axis fixing part 10b on each adjacent end surface, and the first vertical axis Since the lower end of the vertical axis Q is pivotally supported by the fixed part 10a and the second vertical axis fixed part 10b, the first base part 4a and the second base part 4b are connected to be rotatable about the vertical axis Q. Is done. As described above, the pedestal 4 (the first pedestal 4a and the second pedestal 4b) of the branching device 1 has the vertical axis Q that connects the first support 9a (see FIG. 3) and the second support 9b. Since the lower end part is fixed, the vertical part Q moves with the movement of the base part 4 when the base part 4 moves on the traveling rail 2, and the movable girders B1 and B2 are moved accordingly. Can do.

  Here, although the base part 4 moves linearly on the traveling rail 2, the movable girders B1 and B2 move in an arc shape with the vertical axis P (see FIG. 1) on the branch start point side as a fulcrum. As described above, the trajectory of the pedestal 4 is different from the trajectory of the movable girders B1 and B2, but the first support portion 9a for connecting the movable girders B1 and B2 includes the slide holes 9c. The difference between the two loci is absorbed by the slide hole 9c. Moreover, since the base part 4 supports the slide part 8b fixed to the lower surface of the movable girders B1 and B2 with the sliding rod 8a, the sliding part 8b slides on the sliding rod 8a, and the movable girders B1, B2 moves on the base part 4 in an arc shape. Thereby, a change of a track is performed smoothly.

  As described above, since the branching device 1 in the first embodiment is configured, even when a horizontal horizontal load intersecting the traveling rail 2 is transmitted from the movable girders B1, B2, B3 to the base part 4, It is possible to prevent the base portion 4 and the wheel 3 from shifting in the lateral direction. Moreover, since the wheel 3 and the guide part 7 are provided separately, even if a horizontal load is input, the guide part 7 and the traveling rail 2 are not twisted. Therefore, the rotation of the wheel 3 is not hindered when changing the track, the torque required for the drive device 5 can be leveled, the drive device 5 can be miniaturized, and the peak load is reduced to reduce energy consumption. it can. Further, the guide portion 7 is not worn as the wheel 3 is rotated when changing the track, and the guide portion 7 is hardly worn and durability can be improved.

  Further, the base part 4 of the branching device 1 includes a vertical axis fixing part 10 (first vertical axis fixing part 10a and second vertical axis fixing part 10b) to which the lower end side of the vertical axis Q is fixed, and the guide rail 6 is a base. The part 4 and the wheel 3 are straddled. Furthermore, the extended line of the vertical axis Q passes through the inside of a polygon (see FIG. 2) (rectangular in this embodiment) formed by connecting the points where the traveling rail 2 and the wheel 3 are in contact. As a result, even when an excessive horizontal load from the movable girders B1, B2, B3 is transmitted to the pedestal 4 via the vertical shaft fixing part 10, the pedestal 4 floats around the guide rail 6 in an attempt to rotate. Can be prevented. As a result, it is possible to prevent the guide portion 7 from coming into contact with the guide rail 6 or the guide portion 7 from being damaged due to an excessive horizontal load being input to the guide portion 7. As a result, even when an excessive horizontal load is input, the platform 4 can be reliably moved along the guide rail 6.

  Next, a second embodiment will be described with reference to FIG. FIG. 5 is a plan view of an essential part of the branching device 11 in the second embodiment. 5 shows a state in which the movable girders B1, B2 and the base part 4 are seen through like the case of FIG. 2, and the movable girders B1, B2 and the base part 4 are illustrated by imaginary lines (two-dot chain lines). The part below the base part 4 is shown by a solid line. Further, in FIG. 5, the illustration of the traveling rail 13 and the guide rail 16 in the longitudinal direction is partially omitted.

  Here, in 1st Embodiment, the case where the base part 4 moved by the wheel 3 rolling on the linear traveling rail 2 laid in the roadbed G was demonstrated. On the other hand, in the second embodiment, the case where the base part 4 moves in an arc shape by rolling the wheels 13a, 13b on the arc-shaped traveling rails 12a, 12b laid on the roadbed G will be described. To do. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the branch device 11, as shown in FIG. 5, the traveling rails 12a and 12b are formed in an arc shape. The radius of curvature of the traveling rails 12a and 12b is formed in a size that matches the distance from the center of rotation of the movable girders B1 and B2. Between the traveling rails 12a and 12b, a guide rail 16 formed in an arc shape is laid along the traveling rails 12a and 12b. The radius of curvature of the guide rail 16 is also formed in a size that matches the distance from the center of rotation of the movable girders B1 and B2. Therefore, the curvature radii of the traveling rails 12a and 12b and the guide rail 16 are set so as to increase in the order of the traveling rail 12a on the branch start point side, the guide rail 16, and the traveling rail 12b on the branch end point side.

  Wheels 13a and 13b rolling on the running rails 12a and 12b are fixed to both sides of the axle 13c. The outer diameter of the wheel 13a rolling on the traveling rail 12a on the branch start point side is set smaller than the outer diameter of the wheel 13b rolling on the traveling rail 12b on the branch end point side. As described above, since the radius of curvature of the traveling rail 12a on the branch start point side is smaller than the curvature radius of the traveling rail 12b on the branch end point side, the wheels 13a and 13b can rotate without running idle on the traveling rails 12a and 12b. This is to enable rolling.

  As described in the first embodiment, since the first base part 4a and the second base part 4b are connected so as to be rotatable about the vertical axis Q, the traveling rails 12a and 12b and the guide rails are connected. Even if 16 is formed in an arc shape, the base 4 can be bent along the traveling rails 12a and 12b and the guide rail 16. Thereby, the base part 4 can be moved smoothly. As a result, the base portion 4 can be shared with the case of the first embodiment (when the traveling rail 2 is linear), and the versatility of the base portion 4 can be improved.

  Further, as described in the first embodiment, the guide portion 7 is suspended from the lower surface of the base portion 4 (the first base portion 4a and the second base portion 4b) toward the guide rail 6 (see FIG. 3). A shaft portion 7a, a main body portion 7b fixed so as to be rotatable around the shaft portion 7a, and two support shafts 7c provided downward from the main body portion 7b. Each support shaft 7c is rotatably supported. As described above, the main body 7b is fixed so as to be rotatable around the shaft 7a suspended from the guide rail 6. Therefore, even if the guide rail 16 is formed in an arc shape, the guide rail 16 The roller 7d can be rolled along the longitudinal direction of the base plate 4, and the platform 4 is guided along the guide rail 16.

  As described above, since the branching device 11 in the second embodiment is configured, the base 4 moves in an arc shape on the traveling rails 12a and 12b, and the movable girders B1 and B2 are also perpendicular to the branch start point side. It moves in an arc shape with the axis P (see FIG. 1) as a fulcrum. Thus, since the trajectory of movement of the base part 4 and the trajectory of movement of the movable girders B1 and B2 can be made substantially equal, the sliding amount of the slide part 8b sliding on the sliding rod 8a can be reduced. Thereby, the amount of wear caused by sliding of the slide portion 8b and the slide rod 8a can be reduced, and the maintenance frequency of the slide portion 8b and the slide rod 8a can be reduced.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed. For example, the numerical values (for example, the quantity of each component) given in the above embodiment are examples, and other numerical values can naturally be adopted.

  In each of the above embodiments, the case where the first base portion 4a and the second base portion 4b are connected so as to be rotatable about the vertical axis Q to form the base portion 4 is described. However, the present invention is not necessarily limited thereto. Of course, the first base part 4a and the second base part 4b may be integrated without being connected. Further, it is possible to integrate the first base part 4a and the second base part 4b by rigid coupling.

  In each of the above embodiments, the guide 7 has been described with respect to the case where the outer periphery of the roller 7d abuts on the guide rails 6 and 16 and the roller 7d rolls on the side surfaces of the guide rails 6 and 16, but this is not necessarily the case. Of course, other forms are possible. As other forms, for example, those formed of a fluororesin or the like and abutting and sliding on the side surfaces of the guide rails 6 and 16 can be cited. In this case as well, the input horizontal load can be received, and the base 4 can be moved along the guide rails 6 and 16.

  In the second embodiment, the curvature of the wheel 13a that rolls on the travel rail 12a on the branch start point side is smaller than the outer diameter of the wheel 13b that rolls on the travel rail 12b on the branch end point side. Although the case where the wheels 13a and 13b roll on the traveling rails 12a and 12b having different radii has been described, the present invention is not necessarily limited thereto, and the wheels 13a and 13b have the same diameter and are differentially provided to the axle 13c. It is also possible to roll on the traveling rails 12a and 12b having different curvature radii by arranging a device and adjusting the difference in rotational speed between the wheels 13a and 13b.

  In each of the above-described embodiments, the description has been given of the case where the roller 7d is disposed on each of the one side and the other side of the guide rails 6 and 16, and the guide rails 6 and 16 are sandwiched between the two wheels 7d from both sides. It is not necessarily limited to this, and it is naturally possible to adopt a configuration in which the guide rails 6 and 16 are sandwiched from both sides by a total of three or more rollers 7d. For example, a single roller 7d is disposed on one side of the guide rails 6 and 16, and a two-wheel roller 7d is disposed on the other side of the guide rails 6 and 16, respectively. It is good also as a structure pinched from both sides.

  In each of the above-described embodiments, the case where the support mechanism 8 is configured as a sliding support has been described. However, the present invention is not necessarily limited thereto, and may be configured by an elastic support. Here, an example of this elastic bearing will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part same as said each embodiment, and the description is abbreviate | omitted. FIG. 6 is a cross-sectional view of a support mechanism 1008 configured as an elastic support.

  As shown in FIG. 6, the support mechanism 1008 is fixed between the pair of connecting plate portions 1081 fixed to the lower surfaces of the movable girders B 1 and B 2 and the upper surface of the base portion 4, and the pair of connecting plate portions 1081. The movable portions B1 and B2 are supported so as to be movable in the horizontal direction with respect to the base portion 4 by elastic deformation of the elastic portion 1082.

  The elastic portion 1082 includes a plurality of rubber substrates 1082a formed from a rubber-like elastic body in a disk shape, and a plurality of laminated plates 1082b formed in a disk shape from a metal material. 1082a and laminated plates 1082b are alternately laminated.

DESCRIPTION OF SYMBOLS 1,11 Branching device 2,12a, 12b Travel rail 3,13a, 13b Wheel 4 base part 4a 1st base part (a part of base part)
4b Second stand (part of stand)
5 Drive device 6, 16 Guide rail 7 Guide part 7a Shaft part (part of guide part)
7b Main body (part of guide)
7c Support shaft (part of guide)
7d Roller (part of guide)
9a First support portion 9b Second support portion 9c Slide hole 10 Vertical axis fixing portion 10a First vertical axis fixing portion (a part of the vertical axis fixing portion)
10b Second vertical axis fixing part (part of vertical axis fixing part)
B1, B2, B3 movable girders
Q Vertical axis

Claims (4)

A base part on which the ends of two adjacent movable girders are mounted while being rotatably connected around a vertical axis, and supports the base part and rolls on the laid traveling rail. In a branching device comprising a plurality of wheels and a driving device for driving the wheels,
A guide rail laid along the traveling rail;
A branching device comprising a guide portion that is in contact with both side surfaces of the guide rail and is provided separately from the wheel on the base portion.   The guide portion includes a support shaft that is suspended from below the base portion, and one or a plurality of sets of rollers that are rotatably supported by the support shaft, and the one or a plurality of sets of rollers. The branching device according to claim 1, wherein the outer periphery of each of the guide rails is in contact with both side surfaces of the guide rail. The platform includes a vertical shaft fixing portion to which a lower end side of the vertical shaft is fixed,
The guide rail has the pedestal and the wheel straddled,
The branching device according to claim 1 or 2, wherein the extension line of the vertical axis passes through the inside of a polygon formed by connecting the points where the traveling rail and the wheel are in contact with each other. A first support portion and a second support portion which are provided at the end portions of the two adjacent movable girders and configured to be rotatable around the vertical axis;
A slide hole formed in at least one of the first support part or the second support part and having the vertical shaft slidably penetrated along a digit length direction of the movable girder. The branching device according to any one of claims 1 to 3.

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