JP7186439B2 - track excavator - Google Patents

Description

The present invention relates to a trackbed excavator constructed by attaching an undercutter to a work vehicle such as a bulldozer through an undercutter adapter .

Conventionally, as one of the railway track repair devices for performing ballast replacement and board lowering work, for example, an arc-shaped guide rail attached to the side of the vehicle perpendicular to the traveling direction of the vehicle and a guide rail along the guide rail a mounting frame that can be moved up and down between an upper standby position and a lower working position, a connecting plate connected to the mounting frame so that the mounting angle with respect to the mounting frame can be adjusted, and a track bed attached to the tip of the connecting plate Equipped with an excavator and a suction device attached to the rear end of the connecting plate, the excavator is inserted into the track bed under the sleepers to scrape out ballast (crushed stone), and the scraped-out ballast (crushed stone) is sucked by the suction device. A ballast exchanger configured to be carried into a vehicle has been proposed (see Patent Document 1, for example).

JP-A-6-33402

By the way, when excavating crushed stones under railway tracks, it is common to close the tracks at night so that trains cannot pass. There are places where it is difficult to close the tracks. Therefore, construction work that does not close the track, that is, excavating crushed stone in a state where trains can pass even during crushed stone excavation work is called non-closed barakuri construction.

During unenclosed barakuri construction, equipment that does not interfere with the passage of trains is set under the tracks (sleepers), and only when trains do not pass, workers move the equipment to excavate the moving floor little by little, and the areas that have been cleared The height is adjusted by assembling packing etc., and the train is allowed to pass (because it is matched to the train passing, in some cases it is possible to evacuate immediately after working for a few minutes).

However, the track bed exchanging machine described in Patent Document 1 described above exchanges the crushed stone on the track bed while traveling on the rail, so there is a problem that it cannot perform non-closed bulk work.

Therefore, the present invention has been made by paying attention to such problems, and it is possible to easily perform non-closed bulkhead construction in which crushed stone is easily excavated in a state where trains can pass even during crushed stone excavation work without closing the railroad track. An object of the present invention is to provide a ballast excavator capable of

In order to solve the above-mentioned problems, the trackbed excavator according to the present invention includes a work vehicle that travels on the outside of rails by crawlers and tires, and a base end side of a cylinder in which a piston expands and contracts around a horizontal rotation axis. a telescopic mechanism portion rotatably supported by the work vehicle; an undercutter adapter whose rear end portion is rotatably supported about a horizontal rotation axis; an undercutter connecting portion provided on the lower side of the undercutter adapter; and the underline cutter connecting portion and an undercutter that excavates with a plurality of excavating claws provided on the outside of the excavating claw holding chain belt that rotates the track bed under the sleeper, and the undercutter is excavated by the expansion and contraction of the piston by the expansion and contraction mechanism. A trackbed excavator configured to be able to move up and down, wherein the undercutter connecting portion supports the undercutter so as to rotate in a plane perpendicular to the rotation center of the excavating claw holding chain belt. The rotation angle of the undercutter, which rotates in a plane perpendicular to the rotation center of the excavating claw holding chain belt, is regulated within a predetermined angle by the support portion and the cutter rotation support portion. and a cutter rotation angle regulating portion that fixes the rotation angle of the undercutter within the angle, and rotates and fixes the undercutter within the predetermined angle regulated by the cutter rotation angle regulating portion. characterized by
Further, in the ballast excavator according to the present invention, the undercutter adapter is provided with the extension mechanism side connection portion on the upper surface side, and the undercutter connection portion is provided on the lower surface side. The connection flat portion and the undercutter connection flat portion are different in height, and the work vehicle connection flat portion provided with the work vehicle side connection portion on the upper surface side, the undercutter connection flat portion, and the work and a connection portion between the flat portions for connecting the flat portion for connecting the undercutter, the flat portion for connecting the undercutter having a length equal to or greater than the width of the undercutter in the lateral direction, and the adapter for the undercutter In contrast, even if the undercutter rotates within a predetermined angle regulated by the cutter rotation angle regulating portion, the undercutter does not interfere with the working vehicle connecting flat portion and the connecting portion between the flat portions. It is also characterized by its length.
Further, in the ballast excavator according to the present invention, a plurality of undercutter mounting bases to which the undercutter connecting portion is connected in the longitudinal direction of the undercutter are provided at predetermined intervals on the upper surface side of the undercutter. , and the predetermined interval is the same as the interval between the telescopic mechanism portion rotation support portions or the attachment rotation support portions provided on both left and right sides in front of the work vehicle.
In the trackbed excavator according to the present invention, the undercutter adapter is provided on one side in the longitudinal direction of the undercutter, and the undercutter adapter on the one side is connected to the work vehicle. It is also characterized by
Further, in the trackbed excavator according to the present invention, the undercutter adapters are provided on both sides in the longitudinal direction of the undercutter, and the undercutter adapters on both sides are respectively connected to the work vehicle . Also characterized by

According to the trackbed excavator according to the present invention, the work vehicle can run on the roadbed beside the trackbed by connecting the undercutter to the work vehicle having the telescopic mechanism such as a bulldozer or mini excavator via the undercutter adapter. It is possible to excavate the crushed stone on the trackbed with the undercutter.
As a result, it is possible to easily perform unenclosed barracking construction in which crushed stones are easily excavated in a state where trains can pass even during crushed stone excavation work without closing the railroad tracks.

It is a figure which shows the state which is performing excavation work with the ballast excavator of embodiment which concerns on this invention. 1(a) and 1(b) are a front view and a plan view, respectively, of an undercutter to be mounted on a trackbed excavator according to an embodiment of the present invention; FIG. (a) to (c) are a plan view, a front view, and a right side view of the undercutter adapter in the ballast excavator according to the embodiment of the present invention, respectively. 4(a) and 4(b) are diagrams respectively showing a state in which an undercutter attached to a work vehicle is lowered by an undercutter adapter in a trackbed excavator according to an embodiment of the present invention, and a state in which the undercutter is raised and lowered. . Work vehicles are connected to the left and right sides of the undercutter by the undercutter adapters in the trackbed excavator according to the embodiment of the present invention, and the longitudinal direction of the undercutter is substantially perpendicular to the traveling direction of the work vehicle. 1 is a diagram showing an example of a ballast excavator. FIG. An example in which working vehicles are connected to the left and right sides of the undercutter by the undercutter adapter in the trackbed excavator according to the embodiment of the present invention, and are connected so that the longitudinal direction of the undercutter is inclined with respect to the traveling direction of the working vehicle. It is a figure which shows. FIG. 2 is a diagram showing an example of trackbed excavation work by a trackbed excavator constructed by connecting work vehicles to both left and right sides of an undercutter by an undercutter adapter in the trackbed excavator according to the embodiment of the present invention; FIG. 4 is a diagram showing an example of trackbed excavation work by a trackbed excavator constructed by connecting one work vehicle to the base end side of an undercutter by an undercutter adapter in the trackbed excavator according to the embodiment of the present invention; be. FIG. 10 is a view showing another example of trackbed excavation work by a trackbed excavator constructed by connecting work vehicles to the left and right sides of an undercutter by means of an undercutter adapter in the trackbed excavator according to the embodiment of the present invention. .

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a trackbed excavator according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are merely examples of the present invention, and the present invention is not limited to the following embodiments, and can be appropriately modified within the scope of the technical idea of the present invention.

As shown in FIG. 1, the undercutter adapter 1 of the embodiment is an adapter ( jig).

Hereinafter, the work vehicle 3, the undercutter 2, and the undercutter adapter 1 of the embodiment will be described in this order.

<Work vehicle 3>
The work vehicle 3 is a well-known one as described above, and travels on a roadbed or the like by the crawler 3a1. (a blade) and the like, and an attachment rotation support portion 3a3 for rotatably connecting the base portion of the undercutter adapter 1 of the present embodiment. It is rotatably connected and has an attachment such as a blade (blade) and an extension mechanism 3b for lifting the undercutter 2, and the like.

As shown in FIGS. 5 to 8, which will be described later, the telescopic mechanism portion rotation support portions 3a2 are provided two each on the left and right sides in front of the work vehicle 3, for a total of four. Similarly, two attachment rotation support portions 3a3 are provided on each of the right and left sides in front of the working vehicle 3, for a total of four attachment rotation support portions 3a3. Since the attachment rotation support portion 3a3 is provided below the telescopic mechanism portion rotation support portion 3a2, the illustration of the attachment rotation support portion 3a3 is omitted in FIGS.

Therefore, as shown in FIGS. 5 to 8, which will be described later, the work vehicle 3 has one undercutter adapter 1 of the embodiment connected to either one of the left and right sides in front of the work vehicle 3, or the work vehicle 3 The undercutter 2 can be mounted by connecting the undercutter adapter 1 of the embodiment to the left and right sides of the front of the .

The telescopic mechanism portion 3b is a well-known one. A piston 3b2 having an attachment connecting bolt 3b1 at its tip extends and retracts, and the base end side of the cylinder 3b3 rotates to the attachment rotation support portion 3a3 by the telescopic mechanism portion connecting bolt 3b4. By extending and contracting the piston 3b2 with respect to the cylinder 3b3, an attachment such as a blade and the undercutter 2 attached to the undercutter adapter 1 of the present embodiment can be moved up and down. is configured to

<Under cutter 2>
The undercutter 2 includes, for example, a drive gear (not shown) rotated by a hydraulic motor 2a and a driven gear 2c (see FIG. 4.) The trackbed under the sleeper M is excavated with a plurality of digging claws 2e provided at predetermined intervals on the outer side of the excavating claw holding chain belt 2d (see FIG. 4) such as a roller chain or the like that rotates while being stretched over the sleeper M. So far, it is the same as the conventional undercutter 2. It should be noted that the undercutter 2 is not limited to being driven by the hydraulic motor 2a, but may of course be driven by an electric motor or an engine.

In the undercutter 2 of the present embodiment, an undercutter mounting base 2f is provided on the upper surface of the undercutter 2 so that the undercutter adapter 1 can be attached to the undercutter adapter 1 at any position in the longitudinal direction of the undercutter 2. are provided at predetermined intervals w1 (see FIG. 5).

The plurality of undercutter mounting bases 2f are connected to each other through a cutter rotation support through-hole portion 1a11 and a cutter rotation angle regulation long hole portion 1a12, which constitute the undercutter connecting portion of the base portion of the undercutter adapter 1, and which will be described later. Female screw holes 2f1, 2f1 into which the cutter rotation support bolt 1d and the cutter rotation angle regulation bolt 1e are screwed are formed on the inner peripheral surface.

Here, as shown in FIG. 5, which will be described later, the predetermined interval w1 in which the plurality of undercutter mounting bases 2f are provided in the longitudinal direction of the undercutter 2 is determined by Alternatively, the interval between the attachment rotation support portions 3a3 is W2.

Therefore, according to the undercutter adapter 1 of the embodiment, as shown in FIGS. 2, one working vehicle 3 is connected to the undercutter 2 through two undercutter adapters 1, and the rail R Even when excavating crushed stone while traveling on one side of the road bed made of sleepers M and sleepers M, the two adapters 1 for undercutter can receive running resistance and excavation resistance, so excavation work can be stably performed. It can be performed.

(Undercutter adapter 1)
The undercutter adapter 1 of the present embodiment is an adapter for attaching the undercutter 2 to the working vehicle 3, and is configured as shown in FIGS. 3(a) to 3(c). Each of them is configured by joining an extension mechanism side connection portion 1b and a work vehicle side connection portion 1c.

The adapter main body 1a has a telescopic mechanism side connection portion 1b provided by welding or the like on the upper surface side, and a cutter rotation support through hole portion 1a11 constituting an undercutter connection portion and a cutter rotation angle regulating portion on the lower surface side. The undercutter connection flat portion 1a1 provided with the long hole portion 1a12 and the undercutter connection flat portion 1a1 are different in height, and the work vehicle side connection portion 1c is provided on the upper surface side by welding or the like. It has a connection flat portion 1a2 and a connection inclined surface portion 1a3 that connects the undercutter connection flat portion 1a1 and the working vehicle connection flat portion 1a2 so as to be uneven on the inclined surface. The plane portion 1a1 has a length equal to or longer than the width of the undercutter 2 in the lateral direction, and as shown in FIGS. Even if the undercutter 2 rotates within a predetermined angle, the undercutter 2 is configured to have a length that does not interfere with the work vehicle connecting flat portion 1a2 and the flat portion connecting inclined surface portion 1a3.

Further, since the undercutter 2 is connected to the underside of the undercutter connecting flat portion 1a1 as described above, the undercutter 2 is mounted on the top side of the undercutter 2 at a predetermined interval w1 as shown in FIGS. 3(a) to 3(c). A cutter rotation support bolt 1d screwed into a female screw hole 2f1 of one of the undercutter mounting bases 2f (see FIGS. 2(a) and 2(b)) passes through. A cutter rotation support through-hole portion 1a11 that rotatably supports the undercutter 2, and a rotation angle of the undercutter 2 that rotates around the cutter rotation support bolt 1d and the cutter rotation support through-hole portion 1a11. is restricted within a predetermined angle, and the rotation angle of the undercutter 2 is fixed within the predetermined angle by the cutter rotation angle regulating bolt 1e and the nut. and a long hole portion 1a12.

The telescopic mechanism side connecting portion 1b is provided above the tip portion of the adapter main body 1a, that is, above the through hole portion 1a11 for supporting the rotation of the cutter of the flat portion 1a1 for connecting the undercutter. Attachment connection holes 1b1, 1b1 are provided to which attachment connection bolts 3b1 provided at the tip of a piston 3b2 extending and contracting from a cylinder 3b3 of an expansion mechanism 3b provided in front of the working vehicle 3 are connected instead of the attachments 1b1, 1b1. In addition, a bolt insertion hole 1b2 that communicates with the cutter rotation support through hole portion 1a11 of the undercutter connecting flat portion 1a1 is provided. .

The working vehicle side connecting portion 1c is rotatably connected to an attachment turning support portion 3a3 in front of the working vehicle 3 below the base end of the cylinder 3b that constitutes the telescopic mechanism portion 3b. Adapter connecting holes 1c1, 1c1 through which connecting bolts 3e pass are provided at positions where they are connected so as to be rotatable in the vertical direction.

Therefore, as shown in FIG. 4A, the undercutter mounting base 2f on the upper surface side of the undercutter 1 is connected to the undercutter connecting portion 1a of the undercutter adapter 1, and the connecting portion of the undercutter adapter 1 on the expansion mechanism side is connected. The attachment connecting bolt 3b1 at the tip of the extensible piston 3b2 constituting the telescopic mechanism 3b in front of the working vehicle 3 is connected to 1b. When the rotation support portion 3a3 is connected, the expansion mechanism portion 3b is operated by the work vehicle 3 to contract the piston 3b2 as shown in FIG. As shown in , the undercutter 2 can be lowered by extending the piston 3b2.

<How to use the undercutter adapter 1 of the embodiment and an example of excavation work>
Next, an example of excavation work by the undercutter 2 and the work vehicle 3 using the undercutter adapter 1 of the embodiment configured as described above will be described.

(An example of a ballast excavator constructed by connecting working vehicles 3 to both the left and right sides of an undercutter 2)
FIG. 5(b) shows an example of a track excavator constructed by connecting work vehicles 3 to the left and right sides of an undercutter 2 via undercutter adapters 1, respectively. On the other hand, an example in which the longitudinal direction of the undercutter 2 is substantially perpendicular to the traveling direction of the work vehicle 3 is connected so that the longitudinal direction of the undercutter 2 is substantially perpendicular to the traveling direction of the working vehicle 3. FIG. 3 is a diagram showing an example in which the undercutter 2 is connected so that the direction is inclined, that is, the longitudinal direction of the undercutter 2 is inclined with respect to the traveling direction of the work vehicle 3. FIG.

5 and (b), the undercutter mounting bases 2f on the left and right sides of the undercutter 2 are connected between the two undercutter adapters 1. In FIG. The undercutter 2 is connected so that the longitudinal direction of the undercutter 2 is substantially perpendicular to the traveling direction of the work vehicle 3 through the cutter rotation angle regulation bolt 1e through the center of the cutter rotation angle regulation long hole portion 1a12.

On the other hand, in FIG. 6, the cutter rotation angle regulation bolt 1e is passed through both ends of the cutter rotation angle regulation long hole portion 1a12 of the undercutter connecting portion 1a of the undercutter adapter 1, and the bolts 1e are inserted into the undercutter connection portion 1a. The undercutter 2 is connected so that the longitudinal direction thereof is inclined.

When a trackbed excavator is constructed by connecting working vehicles 3 to the right and left sides of the undercutter 2 via undercutter adapters 1, respectively, undercutters are provided on both sides of the rail R and the sleeper M as shown in FIG. A work vehicle 3.3, which is connected to the left and right sides of the undercutter 2 via the adapter 1, can be arranged to excavate the crushed stone under the sleepers M.

In this case, a long type undercutter 2 is used.

(An example of a ballast excavator constructed by connecting a work vehicle 3 to one side of an undercutter 2)
FIG. 8 is a diagram showing an example of a ballast excavator constructed by connecting a work vehicle 3 to the base end of an undercutter 2 via an undercutter adapter 1 .

As shown in FIG. 8, one work vehicle 3 can be connected to the undercutter 2 through two undercutter adapters 1. As shown in FIG.

In this case, one work vehicle 3 must receive the resistance of the undercutter 2 during excavation. The two undercutter adapters 1 are connected to the telescopic mechanism rotation support portion 3a2 and the attachment rotation support portion 3a3, and the two undercutter adapters 1 are attached to the undercutter mounting bases 2f and 2f of the undercutter 2. and attach the undercutter 2.

Then, as shown in FIG. 8, one working vehicle 3 arranged on one side of the rail R and the sleepers M is used to remove the rail R and the sleeper M from the rail R and the sleeper M by the undercutter 2 whose base end side is fixed via two undercutter adapters 1. Excavate the crushed stone while traveling on the roadbed on one side of the track bed.

<Main effects of the undercutter adapter 1 of the embodiment>
As described above, the undercutter adapter 1 according to the embodiment of the present invention includes the undercutter connecting portion 1a to which the undercutter 2 is connected, and the telescopic mechanism portion to which the attachment connecting bolt 3b1 is rotatably connected. Since it has the side connection portion 1b and the work vehicle side connection portion 1c rotatably connected to the work vehicle 3 below the base end of the cylinder 3b3, the work vehicle 3 having the telescopic mechanism portion 3b such as a bulldozer or a mini excavator. By connecting an undercutter 2 to the undercutter 2 through an undercutter adapter 1, crushed stones on the trackbed can be excavated by the undercutter 2 while the working vehicle 3 travels on the roadbed beside the trackbed.

As a result, the crushed stone on the track bed can be excavated by the undercutter 2 without traveling on the rail R, so that the crushed stone can be easily excavated without closing the railroad tracks and in a state where trains can pass even during the crushed stone excavation work. It is possible to easily perform unenclosed barracing construction.

Further, in the undercutter adapter 1 according to the embodiment of the present invention, the undercutter connecting portion includes a cutter rotation support through hole portion 1a11 that rotatably supports the undercutter 2, and a cutter rotation support through hole portion 1a11. Long hole portion for cutter rotation angle regulation that regulates the rotation angle of the undercutter 2 that rotates around the portion 1a11 within a predetermined angle and fixes the rotation angle of the undercutter 2 within the predetermined angle. 1a12.

Therefore, according to the undercutter adapter 1 of the embodiment of the present invention, when connecting the undercutter 2, it is possible to set the undercutter 2 vertically or at an angle with respect to the traveling direction of the work vehicle 3. The crushed stone on the track bed can be easily excavated by the undercutter 2, and the non-closed barracking construction can be efficiently executed.

Further, in the undercutter adapter 1 of the embodiment according to the present invention, the undercutter connecting plane is provided with the telescopic mechanism side connecting portion 1b on the upper surface side and the undercutter connecting portion 1a on the lower surface side. The portion 1a1 and the undercutter connecting flat portion 1a1 have different heights, and a working vehicle connecting flat portion 1a2 provided with a working vehicle side connecting portion 1c on the upper surface side, an undercutter connecting flat portion 1a1 and the working vehicle. It has a planar portion connecting inclined surface portion 1a3 that connects the connecting planar portion 1a2, and the undercutter connecting planar portion 1a1 has a length equal to or greater than the width of the undercutter 2 in the lateral direction. Even if the undercutter 2 rotates with respect to the adapter 1 within the predetermined angle regulated by the cutter rotation angle regulating elongated hole 1a12, the undercutter 2 does not move between the work vehicle connection flat portion 1a2 and the flat portion connection inclination. It is configured to have a length that does not interfere with the surface portion 1a3.

Therefore, according to the undercutter adapter 1 of the embodiment according to the present invention, even if the undercutter 2 is rotated when the undercutter 2 is connected, the undercutter 2 is connected to the working vehicle connecting flat portion 1a2 and the flat surface. Since there is no interference with the connecting inclined surface portion 1a3, the undercutter 2 can be freely rotated within a predetermined angle regulated by the long hole 1a12 for regulating the rotation angle of the cutter to excavate the crushed stone on the track bed. It is possible to efficiently execute the closed barrier construction.

Further, in the undercutter adapter 1 according to the embodiment of the present invention, on the upper surface side of the undercutter 2, there is provided a cutter rotation support provided on the undercutter connection flat portion 1a1 of the adapter main body 1a constituting the undercutter connection portion. An undercutter mounting frame 2f connected to the through hole portion 1a11 and the elongated hole portion 1a12 for cutter rotation angle regulation by a cutter rotation support bolt 1d and a cutter rotation angle regulation bolt 1e extends in the longitudinal direction of the undercutter 2. A plurality of them are provided at predetermined intervals w1.

Therefore, according to the undercutter adapter 1 according to the embodiment of the present invention, the undercutter 2 is connected by arbitrarily selecting a plurality of undercutter mounting bases 2f provided at predetermined intervals w1 in the longitudinal direction of the undercutter 2. As a result, the length of the undercutter 2 can be adjusted, and the non-closing bar-cutter construction can be efficiently executed.

In particular, in the undercutter adapter 1 according to the embodiment of the present invention, a predetermined interval w1 in which the undercutter mounting frame 2f is provided in the longitudinal direction of the undercutter 2 is provided on both left and right sides in front of the work vehicle 3. Since the interval w2 of the support portion 3a2 or the attachment rotation support portion 3a3 is the same, one undercutter 2 is connected to one working vehicle 3 via two undercutter adapters 1 as shown in FIG. It becomes possible to

Therefore, according to the undercutter adapter 1 of the embodiment according to the present invention, one undercutter fixed via two undercutter adapters 1 by one work vehicle 3 arranged on one side of the rail R and the sleeper M 2, it is possible to excavate crushed stone while traveling on the road bed on one side of the track bed consisting of rails R and sleepers M, and the undercutter 2 is stably attached to one working vehicle 3. , it is possible to efficiently execute non-closed barracing construction.

Further, as shown in FIG. 5(b), the undercutter adapter 1 according to the embodiment of the present invention is provided on both the left and right sides of the undercutter 2, and the work vehicle 3 is connected to the left and right sides of the undercutter 2 to perform track excavation. When the drilling machine is constructed, as shown in FIG. 7, working vehicles 3.3 are arranged on both sides of the rail R and the sleepers M, and while the two working vehicles 3.3 are traveling, crushed stone under the sleepers M As shown in FIG. 8, one work vehicle 3 is connected to the undercutter 2 through two undercutter adapters 1, and one work vehicle arranged on one side of the rail R and the sleeper M In 3, it is possible to excavate crushed stones while traveling on one side of the road bed consisting of rails R and sleepers M by means of the undercutter 2 whose base end is fixed via two undercutter adapters 1. However, it is possible to efficiently execute non-closed barakuri construction.

In the description of the above embodiment, the work vehicle 3 is provided with two telescopic mechanism portion rotation support portions 3a2 and two attachment rotation support portions 3a3 on each of the left and right sides in front thereof, as shown in FIGS. One undercutter adapter 1 is connected to either one of the left and right sides in front of the working vehicle 3, or as shown in FIG. However, the present invention is not limited to such a work vehicle 3. For example, the work vehicle 3 shown in FIGS. 5 to 8, such as a work vehicle 3' shown in FIG. It is smaller than the working vehicle 3', and is provided with a telescopic mechanism part rotation support part 3a2 and an attachment rotation support part 3a3 in the front center of the work vehicle 3'. Of course, it may be constructed so that the undercutter 2 is attached. However, in the case of this working vehicle 3', since only one undercutter adapter 1 is used in a small working vehicle, as shown in FIG. Although excavation work is often performed by connecting both sides of the cutter 2 in the longitudinal direction, as shown in FIG. It is not something that denies excavation work.

Further, in the description of the above embodiment, the work vehicle 3, 3' to which the undercutter 2 is mounted via the undercutter adapter 1 is described as a work vehicle with a crawler 3a1 such as a mini excavator or a bulldozer. However, the vehicle is not limited to this, and may be a working vehicle such as a tractor without the crawler 3a1, or may be a road-rail vehicle having wheels capable of running on the crawler 3a1 and the rail R.

1 Undercutter adapter 1a Adapter main body 1a1 Undercutter connection plane portion 1a11 Cutter rotation support through hole (undercutter connection portion)
1a12 Long hole for regulating cutter rotation angle (undercutter connecting portion)
1a2 Work vehicle connection plane portion 1a3 Flat surface portion connection inclined surface portion 1b Extension mechanism side connection portion 1b1 Attachment connection hole portion 1b2 Bolt insertion hole 1c Work vehicle side connection portion 1c1 Adapter connection hole portion 1d Cutter rotation support bolt 1e Cutter rotation angle control bolt 1f Adapter connection bolt 2 Undercutter 2a Hydraulic motor 2c Driven gear 2d Excavating claw holding chain belt 2e Excavating claw 2f Undercutter mounting base 2f1 Female screw hole 3, 3' Working vehicle 3a Working vehicle main body 3a1 Crawler 3a2 Expansion mechanism rotation support 3a3 Attachment rotation support 3b Expansion mechanism 3b1 Attachment connection bolt 3b2 Piston 3b3 Cylinder 3b4 Expansion mechanism connection bolt R Rail M Sleeper

Claims (5)

A work vehicle that runs on the outside of the rail with crawlers and tires,
an expansion and contraction mechanism in which a base end of a cylinder in which the piston expands and contracts is rotatably supported by the work vehicle about a horizontal rotation axis;
The front end of the telescopic mechanism is rotatably supported on the tip of the piston about a horizontal rotation axis, while the rear end of the telescopic mechanism is rotatable on the horizontal rotation axis. an undercutter adapter supported by
an undercutter connecting portion provided on the underside of the undercutter adapter;
an undercutter that is attached to the underline cutter connecting portion and excavates with a plurality of excavating claws provided on the outside of the excavating claw holding chain belt that rotates the track bed under the sleeper; A trackbed excavator configured to be able to move up and down the undercutter by extension and contraction,
The undercutter connecting portion is
the undercutterso as to rotate in a plane perpendicular to the center of rotation of the excavating claw holding chain belta cutter rotation support supported on the
by the cutter rotation supportIn a plane perpendicular to the rotation center of the excavating claw holding chain belta cutter rotation angle regulating portion that regulates the rotation angle of the rotating undercutter within a predetermined angle and fixes the rotation angle of the undercutter within the predetermined angle;
The undercutter is rotated within a predetermined angle regulated by the cutter rotation angle regulating portion and fixed.track excavator. In the ballast excavator according to claim 1,
The undercutter adapter,
an undercutter connection plane portion provided with the expansion mechanism side connection portion on the upper surface side and the undercutter connection portion provided on the lower surface side;
a working vehicle connecting flat portion having a height different from that of the undercutter connecting flat portion and provided with the working vehicle side connecting portion on an upper surface side;
a connection portion between the flat portions that connects the undercutter connection flat portion and the work vehicle connection flat portion;
The undercutter connecting flat portion has a length equal to or longer than the width of the undercutter in the lateral direction, and the undercutter is positioned within a predetermined angle regulated by the cutter rotation angle regulating portion with respect to the undercutter adapter. A trackbed excavator , wherein the length of the undercutter is such that it does not interfere with the working vehicle connecting flat portion and the connecting portion between the flat portions even when the cutter rotates. In the ballast excavator according to claim 1 or claim 2 ,
On the upper surface side of the undercutter, a plurality of undercutter mounting bases to which the undercutter connecting portion is connected are provided at predetermined intervals in the longitudinal direction of the undercutter,
The trackbed excavator is characterized in that the predetermined interval is the same as the interval between the telescopic mechanism rotation support portions or the attachment rotation support portions provided on both left and right sides in front of the working vehicle. Claim 1 toClaim 3according to any one of claimsIn the ballast excavator,
Said An undercutter adapter is provided on one side in the longitudinal direction of the undercutter, and the undercutter adapter on the one sideto the work vehicleA ballast excavator characterized by being connected. Claim 1 toClaim 3according to any one of claimsIn the ballast excavator,
Said Undercutter adapters are provided on both sides of the undercutter in the longitudinal direction, and each of the undercutter adapters on both sidesto the work vehicleA ballast excavator characterized by being connected.

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