JP2016190538A - Operation controller of road-rail vehicle turntable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable such a control as to forbid the overhanging motion of a turntable under the condition that a gravity center position of a road-rail vehicle shifts wide from a turntable mount position to the front side.SOLUTION: This invention comprises: a turntable 4 mounted on a road-rail vehicle at a position rearward of the gravity center position; a turntable drive device 5 that drives the overhanging and retraction of the turntable 4; cargo loading detection means 15 that detects whether or not a load-carrying platform 14 is loaded with a boom front; swivel detection means 25 that detects that a boom 22 swivels to a vehicle front position; and a controller 9 that outputs alarm signals or/and outputs control signals for forbidding overhanging motion by the turntable drive device with the cargo loading detection means 15 in a state of detecting no cargo loading and with the boom front swivel detection means 25 in a state of detecting the boom existing at a boom front position, thereby enabling the floating operation of a vehicle 1 when there is a risk that the vehicle tilts in a vehicular floating state.SELECTED DRAWING: Figure 1

Description

  The invention of the present application is a rail-rail vehicle having a vehicle wheel having a tire wheel for road surface traveling and an iron wheel for track traveling, and further comprising a turntable that protrudes below the vehicle body and levitates and supports the vehicle body so that it can turn horizontally. The present invention relates to a turning table operation restricting device for a rail and land vehicle that can restrict the floating support of the vehicle by the turning table when there is a problem in supporting the rising by the turning table.

  As a work vehicle for mounting the turntable operation restriction device of the present application, the present applicant has developed a railcar shown in FIG. The track-and-rail vehicle of FIG. 5 has a vehicle body 11 (having a pair of left and right vehicle body frames) with four tire wheels 12 for traveling on the road surface and four iron wheels 3 for track traveling, and further includes a cab 13 and a loading platform 14. A crane working machine 2 having a boom 22 is mounted on a vehicle body 11 between the vehicle body 11 so as to be able to turn horizontally, and a turntable 4 for levitating and supporting the vehicle body near the center of the vehicle body 11 so as to be able to turn horizontally. Equipped with. The track-and-rail vehicle in FIG. 5 employs a small truck as the vehicle 1 and is generally called a cargo-track and land vehicle.

  The crane work machine 2 has a telescopic boom 22 attached to the upper part of a turning post 21 on the vehicle body 11 between the rear surface of the cab 13 and the front part of the loading platform 14. The crane working machine 2 normally stores the boom 22 in the rear turning position so as to show the solid line (see FIG. 5), but depending on the case, the boom 22 turns forward so that the boom is shown in the chain line (reference numeral 22 '). It can also be stored in position.

  The front and rear iron wheels 3 (there are a pair of left and right) are respectively connected to an upper storage position (position 3 shown by a solid line) and a lower use position (reference numeral 3 'shown by a chain line) by iron wheel drive devices 30A and 30B made of telescopic cylinders. The position is swung up and down.

  The turntable 4 is provided with a ground plate 43 at a lower portion of a base plate 41 via a turning bearing 42 so as to be relatively rotatable. The turntable 4 is moved up and down by a turntable drive device 5.

  The turntable drive device 5 has two jack cylinders (see reference numerals 51 and 51 in FIG. 2) spaced apart from each other on the left and right sides, and each jack cylinder has a vehicle body 11 (a pair of left and right vehicle body frames). Attached to the outer surface of the device in a downwardly extended posture. The turntable driving device 5 fixes the left and right end portions of the base plate 41 of the turntable 4 to the lower ends of the left and right jack cylinders (reference numeral 51 in FIG. 2), and rotates the jack cylinders by extending and contracting. The chassis 4 can be raised and lowered.

  By the way, the support part P of the turntable 4 by the turntable driving device 5 is two points (see FIG. 2) spaced in the vehicle width direction, but one point at the same position in the vehicle front-rear direction. Therefore, in the vehicle levitation support state by the turntable driving device 5 (two left and right jack cylinders) and the turntable 4, the weight balance in the vehicle front-rear direction (the center of gravity G of the rail vehicle) is front and back from the support portion P by the turntable 4. If the car is crazy, there is a risk that the rail car will tilt downward to the heavy side.

  In order to put the track-and-rail vehicle of FIG. 5 on the track from the road surface running state (the state in which each iron wheel 3 and the turntable 4 are stored upward), it is carried out as follows. The vehicle 1 is stopped so that the center of the turntable 4 is located at the center between the two tracks R and R in the railroad crossing. → The vehicle 1 is extended downward by extending the turntable drive device 5. Floating from the road surface GL (the turntable is in the state of 4 ') → the front and rear iron wheels 3 are swung to the lower use position by the extension operation of the iron wheel drive devices 30A and 30B, respectively (the state of the reference numeral 3') → When the vehicle is floating, the vehicle 1 is turned 90 degrees horizontally around the turning bearing of the turntable 4 ′ (the left and right iron wheels are directly connected to the tracks R and R as indicated by reference numerals 3 ″ and 3 ″). In this state, the turntable driving device 5 is driven to reduce and the turntable 4 is moved upward so that the four iron wheels 3 ″ are placed on the tracks R and R, respectively. When moved up to the original retracted position, the track-rail vehicle can be installed so that it can run on the track.

  By the way, in the track-and-rail vehicle with the loading platform 14 shown in FIG. 5, when carrying out an on-rail operation | work with each iron wheel 3 on the track | truck R, normally the load W (various materials and tools) is loaded on the loading platform 14. The mounting portion of the turntable 4 is a predetermined length longer than the center of gravity G of the railway vehicle in a state where the boom 22 of the crane work machine 2 is stored in the rearward turning position (the position indicated by the solid line) and the loading platform 14 is empty. Thus, it is set to a position closer to the rear (position P). That is, in the track-and-rail vehicle of FIG. 5, it is assumed that the load W is loaded on the loading platform 14 when the mounting portion (supporting portion P) of the rolling platform 4 is supported by the rolling platform 4 when the vehicle floats. In this state, the position is set to a position corresponding to the vicinity of the center of gravity of the rail car (for example, near the center of gravity G of the rail car when the loading platform 14 is empty and a portion closer to the rear by a predetermined length than the support portion P by the turn table). In the following description, the gravity center position G of the rail vehicle when the boom is pivoted backward and the loading platform 14 is empty is simply referred to as the initial gravity center position G, and the mounting portion of the turntable 4 (or the support portion by the turntable 4). P) may be simply referred to as a turntable support part P.

  As a known example of a cargo track land vehicle as shown in FIG. 5, there is one disclosed in, for example, Japanese Patent Application Laid-Open No. 2012-56557 (Patent Document 1). The comparison between this patent document 1 and this application will be described later.

JP 2012-56557 A

  By the way, if the turntable support part P is set to a position closer to the rear than the initial center of gravity position G as in the case of the railroad car in FIG. 5, the load W is loaded on the load bed 14 when the turntable 4 supports the vehicle floating. If not, the initial center-of-gravity position G is located closer to the front of the vehicle than the turntable support portion P, and the weight balance may be out of place with the vehicle stand by the turntable 4 and the front side of the rail vehicle may tilt downward. Occurs. In particular, if the load on the loading platform 14 is empty and the boom 22 is in the forward retracted state (reference numeral 22 '), the initial center of gravity position G moves further to the front side of the vehicle than the turntable support portion P. The front and rear weight balance of P is further greatly deviated. As a result, the tilting action of the vehicle 1 toward the front side is further increased, and the vehicle 1 may be largely tilted downward toward the front side in the vehicle floating support state.

  If the vehicle 1 is greatly inclined downward toward the front side in the vehicle levitation support state, the front side iron wheel 3 may come into contact with the ground when the front side iron wheel 3 is extended downward. There is a problem that it is impossible to place the iron wheel on the tracks R and R because the track vehicle cannot turn around the turntable 4 '. In addition, if the vehicle is levitated and supported in a state where the vehicle is largely inclined, a force acting on the slewing bearing portion of the turntable 4 'acts, so that there is a problem that damage to the turntable becomes large (it is easy to break down). It was.

  By the way, the above-mentioned Patent Document 1 discloses that the position of the turntable can be slid in the longitudinal direction of the vehicle body in a vertical posture by a slide mechanism. And in this patent document 1, when it is assumed that the center of gravity position in the longitudinal direction of the vehicle body is on the rear side (loading platform side) based on the loading situation on the loading platform, the position of the turntable is determined by the slide mechanism. By sliding to the rear side of the vehicle body, the vicinity of the front-rear center of gravity position can be levitated and supported by the turntable.

  However, in this Patent Document 1, the front and rear center of gravity position can be supported by the turntable by changing the front and rear support position by the turntable to the front and rear, but the turntable is slid back and forth. In order to achieve this, a slide mechanism is required, so that there is a problem that the configuration for mounting the slide mechanism becomes complicated and the cost increases.

  In view of this, the present invention can perform control that can prohibit the overhanging operation of the turntable with a simple configuration when the position of the center of gravity of the railroad vehicle deviates greatly from the mounting position of the turntable to the front side. The purpose of the present invention is to provide a turning table operation restricting device for a railway vehicle.

  The present invention has the following configuration as means for solving the above problems. In the present invention, the vehicle body includes four tire wheels for road surface traveling and four iron wheels for track traveling, and further includes a loading platform on the vehicle body, and a boom between the vehicle cab and the loading platform. It is intended for a turntable operation restriction device for a railroad vehicle equipped with a working machine that can be turned. In the following description, the “railway turntable operation restriction device” of the present invention may be simply referred to as a “turnboard operation restriction device”. Further, in the following description, the center of gravity position of the railway vehicle when the boom is in the backward turning position and the loading platform is empty is referred to as the initial center of gravity position, and the mounting portion (or supporting portion by the rolling table) of the rolling table is simply referred to as the rolling table. It is referred to as a support portion, and the gravity center position of the track vehicle when the gravity center position of the rail vehicle changes from the initial gravity center position may be referred to as a variable gravity center position.

  The turntable operation restriction device of the present invention has the following configurations.

  First, the vehicle body is equipped with a turntable that floats below the vehicle body and supports the vehicle so that it can turn horizontally with the grounding plate in contact with the ground plate. And the support part (turning board support part) of this turntable is set to the back position rather than the said initial gravity center position of a track-and-rail vehicle.

  Further, the turntable operation restriction device of the present application includes a turntable drive device for extending and retracting the turntable, a load loading detection means for detecting whether or not a load is loaded on the load bed, and a boom as a vehicle. The boom forward turning detection means for detecting that the vehicle is turning to the forward position of the vehicle, the load carrying detection means being in the load undetected state, and the boom forward turning detection means being in the boom forward position. , And / or a control device that outputs a control signal that outputs an alarm signal and / or prohibits overhang driving by the turntable drive device.

  The control device used in the turntable operation restriction device of the present application outputs a warning signal as described above and / or outputs a control signal for prohibiting overhang driving by the turntable drive device. However, the control signal by this control device may be only the alarm signal for the alarm device or only the overhang drive prohibition signal for the overhang prohibition control device. Furthermore, both the above alarm signal and the overhang drive prohibition signal are simultaneously transmitted. It may be output.

  In the turntable operation restriction device of the present invention, whether or not the vehicle can be supported by the turntable is controlled based on various conditions as follows.

  First, when a load is loaded on the loading platform (a load loading non-detection signal is not transmitted from the load loading detection means), the center of gravity position of the rail vehicle is close to the support portion by the turntable due to the weight of the load. Thus, there is no particular problem with the vehicle levitation support operation (extension operation of the turntable drive device) by the turntable, and a signal related to the extension restriction of the turntable drive device is not transmitted from the control device. When the load loading detection means detects the load on the loading platform, even if the boom is in the forward retracted posture, the center of gravity position (variable center of gravity position) of the rail vehicle at this time and the above-described turntable support portion are dangerous. Therefore, even if the vehicle is lifted and supported, the track-and-rail vehicle does not tilt so as to cause a problem. Therefore, in this case as well, even if the turntable drive device is operated to be extended, there is no need to apply the extension control to the turntable drive device. Therefore, the control device is involved in the extension control of the turntable drive device. No signal is sent.

  On the other hand, when no load is loaded on the loading platform (the load loading detection means does not detect the loading on the loading platform), the center of gravity of the rail vehicle is on the front side as much as there is no loading on the loading platform, In this case as well, when the boom is in the rear retracted position, the center of gravity of the rail vehicle is at the initial center of gravity and does not become so large that the rail vehicle tilting operation works with respect to the support unit of the wheel base. Even if the vehicle is levitated and supported by overhanging driving, the tracked vehicle does not tilt so as to be particularly problematic. Therefore, in this case as well, even if the turntable drive device is operated to be extended, there is no need to apply the extension control to the turntable drive device. Therefore, the control device is involved in the extension control of the turntable drive device. No signal is sent.

  However, when the load loading detection means is not detecting the load on the loading platform and the boom is in the forward retracted state (the boom forward turning detection means is turned on), both of them move the railcar center of gravity position forward. The center of gravity position (variable center of gravity position) of the current rail vehicle moves to the front side (dangerous side) more than the permissible range involving danger when the vehicle is levitated. In this manner, in the state where the load non-detection signal from the load loading detection means and the boom forward turning position detection signal from the boom forward turning detection means are output, the drive device extension operation from the turntable drive device When the signal is output, an alarm signal is output from the control device or / and a control signal for prohibiting overhang driving by the turntable drive device is output.

  It should be noted that the control signal from the control device does not directly prohibit the overhang drive of the turntable drive device, but the operator recognizes the alarm signal and based on that, the overhang drive of the turntable drive device is not prohibited. By immediately stopping the driving operation, the overhang driving of the turntable drive device can be stopped before the turntable comes into contact with the ground (before the vehicle rises).

  As described above, the turntable operation restriction device of the present invention is a state in which the load loading non-detection signal from the load loading detection means and the boom forward turning position detection signal from the boom forward turning detection means are transmitted to the control device. When the overhanging operation signal from the wheel base driving device is output to the control device in a state where the position of the center of gravity of the rail vehicle is shifted forward from the support portion of the wheel base so that there is a risk of tilting the rail car The control device outputs an alarm signal or / and a control signal for prohibiting overhang driving of the turntable drive device.

  Therefore, even if the turntable drive device is operated in a projecting manner in a state where there is a risk of tilting when the railroad vehicle is levitated and supported, an alarm can be issued or / and the dangerous side operation of the turntable drive device can be prohibited. Since the control is performed, before the vehicle is lifted and supported by the turntable, the overhang drive of the turntable drive device is stopped (or the overhang drive can be stopped), so that the vehicle is prevented from tilting forward. There is an effect that it can be prevented.

  Further, in the turntable operation restricting device of the present application, it is possible to perform control that can prohibit the dangerous side operation of the turntable drive device in an alarm or / and by the control by the control device, There is also an effect that the entire structure of the turntable operation restriction device can be manufactured easily and inexpensively.

It is a side view of a track-and-rail vehicle equipped with the turntable operation restriction device of the embodiment of the present application. It is a top view of the track-and-rail vehicle of FIG. It is a block diagram of a turntable operation control device of an example of the present application. FIG. 2 is a hydraulic circuit diagram (including an electric circuit) of the rail car of FIG. 1. It is a side view of the track-and-rail vehicle (substantially the same as FIG. 1) which the present applicant developed.

  Hereinafter, the turning table operation restricting device for a rail vehicle according to the present embodiment will be described with reference to FIGS.

  In this embodiment, as a track-and-rail vehicle for mounting the turntable operation restricting device of the present application, as shown in FIGS. 1 and 2, four tire wheels 12 for road surface traveling and four for track traveling are mounted on a vehicle body 11. It has an iron wheel 3, further has a loading platform 14 on the vehicle body 11 and is equipped with a crane work machine 2 having a boom 22 between the cab 13 and the loading platform 14 of the vehicle 1 so as to be able to turn. ing. In addition, in order to change the iron wheels 3 on the track R, this track-and-rail vehicle is provided with a turntable 4 and a turntable drive device 5 near the center of the front and rear of the vehicle body 11, and both devices (4 and 5). ), The vehicle 1 can be levitated and supported.

  By the way, the basic configuration of the track-and-rail vehicle of FIG. 1 is substantially the same as that of FIG. 5 described in the background section above, and many of the basic configuration parts and the operation method in the track-and-ground vehicle of FIG. Although the thing described in the above-mentioned track-and-rail vehicle of FIG. 5 is used, about the track-and-rail vehicle of FIG. 1, the following description is added in addition to description in FIG.

  FIG. 4 shows a hydraulic circuit 7 for operating the respective front and rear iron wheels 3 and the hydraulic actuators (31A, 31B, 51) of the turntable driving device 5. The hydraulic circuit 7 incorporates an electric circuit 8 that controls an alarm device A and an overhang prohibition control device B, which will be described later.

  In the hydraulic circuit 7 shown in FIG. 2, reference numeral 71 is a hydraulic pump, 72 is a tank, 73 is a pump circuit to which hydraulic oil is supplied from the hydraulic pump 71, 74 is a tank circuit connected to the tank 72, and 75 is a pump circuit 73. An unrotor circuit interposed between the tank circuits 74. In the unrot circuit 75, an electromagnetic unload valve 76 serving as an overhang prohibition control device B described later is interposed.

  The drive devices 30A for the left and right front iron wheels 3 (two on the left and right) use telescopic cylinders 31A and 31A, respectively. The telescopic cylinders 31A and 31A for the front iron wheels are manually operated. It is expanded and contracted by the switching valve 32A.

  The drive devices 30B for the left and right rear iron wheels 3 (two on the left and right) also use telescopic cylinders 31B and 31B, respectively. The telescopic cylinders 31B and 31B for the rear iron wheels are also manually operated. It is expanded and contracted by the switching valve 32B.

  The jack cylinders 51 and 51 for the turntable drive device 5 are expanded and contracted by a manually operated switching valve 52. The spool of the switching valve 52 for each jack cylinder 51 is provided with a detection switch 53 that detects that the switching valve 52 has been operated to the extension side. When this detection switch 53 is turned on, an ON signal is transmitted to the control device 9 described later, and the related operation thereafter will be described later.

  As a configuration related to the turntable operation restriction device of the embodiment of the present application, there is the following.

  First, in the vicinity of the front and rear center portion of the vehicle body 11, there is provided a turntable 4 that supports the vehicle body 11 so as to be able to turn horizontally, and a turntable drive device 5 that moves the turntable 4 up and down.

  As shown in FIGS. 1 and 2, the turntable 4 is provided with a grounding plate 43 at a lower portion of a base plate 41 via a turning bearing 42 so as to be relatively rotatable.

  As shown in FIG. 2, the turntable driving device 5 has two jack cylinders 51, 51 spaced apart from each other on the left and right sides, and the jack cylinders 51, 51 are connected to left and right frames 11 a, 11 a of the vehicle body 11. It is attached to the outer surface in a downward extending posture. Then, the left and right ends of the base plate 41 of the turntable 4 are connected to the lower ends of the jack cylinders 51, 51, and the turntable is operated by reducing / extending the turntable drive device 5 (the jack cylinders 51, 51). 4 can be moved up and down between an upper storage position (a position indicated by a solid line indicated by reference numeral 2 in FIG. 1) and a lower projecting position (a position indicated by a chain line indicated by reference numeral 2 'in FIG. 1).

  The mounting position P of the turntable 4 is the same as the mounting position of the turntable drive device 5 (the jack cylinders 51), and the boom 22 is in the rear turning position (the position indicated by the reference numeral 22 'in FIG. 1). The position is set to a rearward position by a predetermined length from the center of gravity position G of the railway vehicle when the loading platform 14 is empty. In the description of this embodiment as well, the mounting position P of the turntable 4 is referred to as the turntable support portion P, and the center of gravity G of the rail vehicle with the boom rear turning position and the load platform 14 empty is the initial center of gravity position G. There is.

  By the way, in the turntable operation restricting device according to the embodiment of the present invention, the reason why the turntable support portion P is set at a position closer to the rear side than the initial center of gravity position G is as described in the above section “Background Art”. When on-rail work is performed with a track-rail vehicle with a track, the center of gravity of the track-rail vehicle actually moves backward from the initial center-of-gravity position G because the load W (various materials and tools) is usually loaded on the loading platform 14 Therefore, it is to make it fit (approach).

  On the other hand, as shown in FIGS. 1 to 3, the turntable operation restriction device of this embodiment includes a load loading detection means 15 for detecting whether or not a load W is loaded on the load platform 14 and a boom 22. Boom forward turning detection means 25 for detecting that the vehicle 1 is turning to the front position of the vehicle 1, and a turntable drive device extension operation detection means 53 for detecting that the turntable drive device 5 is operated to the extension drive side; Based on the combination of the detection signals of the load loading detection means 15 and the boom forward turning detection means 25 and the extension operation signal from the turntable drive device extension operation detection means 53, the extension drive by the turntable drive device 5 is performed. And a control device 9 for transmitting a control signal for prohibition.

  In the embodiment shown in FIGS. 1 and 2, the load loading detection means 15 is provided with a distance sensor (infrared sensor) on the inner surface (both sides or one side) of the side plate 14 and the presence or absence of the load W is detected by the distance sensor. The one that can detect is adopted. In addition to the distance sensor, the load loading detection means 15 may employ a switch or the like that provides a loading plate supported by a spring on the loading platform bottom plate and detects the vertical displacement of the loading plate. .

  The boom forward turning detection means 25 detects the turning position of the turning post 21 of the crane work machine 2 and may be any device that transmits an ON signal when the boom 22 is turning forward. As the boom forward turning detection means 25, a boom turning angle detected by an existing boom turning position detector may be detected, or a limit switch that is turned on when the boom 22 faces the forward turning position is used. You may have done.

  The turntable drive device overhanging operation detecting means 53 can use a detection switch for detecting that the switching valve 52 for the turntable drive device 5 (the jack cylinders 51, 51) is operated to the extension side. .

  As shown in FIG. 3, the control device 9 is in a state in which the load loading detection means 15 sends a load loading non-detection signal and the boom forward turning detection means 25 sends a boom forward turning position detection signal. When a drive device extension operation signal is transmitted from the turntable drive device extension operation detection means 53, an alarm signal is issued to the alarm device A based on these three signals and / or the turntable drive device 5 The overhanging prohibition control device B that prohibits the overhanging is activated.

  As the alarm device A, for example, an alarm buzzer incorporated in the electric circuit 8 of FIG. 4 or a lamp display on the display can be adopted.

  As the overhang prohibition control device B, in the illustration of FIG. 4, an unload circuit 75 having an electromagnetic unload valve 76 interposed is employed. The overhang prohibition control device B of this embodiment functions as follows. First, when the detection switch 53 (FIG. 4), which is the turntable drive device extension operation detecting means, detects that the switching valve 52 for the turntable drive device 5 has been operated to the extended side, the ON signal from the detection switch 53 is detected. Is transmitted to the control device 9. Then, in the state where the load loading non-detection signal from the load loading detection means 15 and the boom forward turning position detection signal from the boom forward turning detection means 25 are output to the control device 9, respectively, the ON from the detection switch 53 is turned on. When the signal is output to the control device 9, the switch 81 in the electric circuit 8 is turned ON by the signal from the control device 9 (the electric circuit 8 is closed), thereby opening the electromagnetic unload valve 76. Then, when the hydraulic oil supply to the turntable drive device 5 (the jack cylinders 51 and 51) is stopped, the extension operation of the turntable drive device 5 is immediately stopped.

  In this embodiment, an alarm device (buzzer) A is incorporated in the electric circuit 8. When the electric circuit 8 is closed, the unload valve 76 is opened and the alarm device A is also activated. It is supposed to be.

  By the way, in the above embodiment, the target to be operated by the control device 9 is both the alarm device A and the overhang prohibition control device B, but in other embodiments, only the alarm device A is operated by the control device 9. Alternatively, only the overhang prohibition control device B may be used.

  When the operation target by the control device 9 is only the alarm device A, the operator notices that the operator is performing a dangerous operation by the alarm from the alarm device A, so that the operator performs an overhang operation on the turntable drive device 5. Is immediately stopped (the extension side operation of the switching valve 52 is canceled), so that the turntable 4 can be prevented from coming into contact with the ground (the railcar is not supported to float). In addition, a valve for closing the pump circuit 73 is provided in the pump circuit 73 as an operation for stopping the extension drive of the turntable drive device 5 when the control device 9 is operated only for the extension prohibition control device B. When the control signal is output from the control device 9, the supply of hydraulic oil to the turntable drive device 5 may be stopped by closing the valve with the control signal.

  When the operation target by the control device 9 is only the overhang prohibition control device B, the overhang drive for the turntable drive device 5 (the jack cylinders 51 and 51) is automatically performed by the operation of the overhang prohibition control device B. Therefore, it is possible to prevent the turntable 4 from coming into contact with the ground (the railcar is not supported to levitate).

  In the turntable operation restriction device of this embodiment, whether or not the turntable 4 can support the levitation of the vehicle 1 is controlled as follows based on various conditions.

  First, when the load loading detection means 15 detects the load W on the loading platform 14 (the position of the center of gravity of the rail vehicle is close to the turntable support portion P due to the weight of the loading 14), or the boom 22 is stored rearward. When in the posture (the center of gravity position of the rail vehicle is at the initial center of gravity position G or the turntable support portion P side), the center of gravity position of the track vehicle and the turntable support portion P are not separated so as to be dangerous. Even if the vehicle 1 is levitated and supported, the vehicle does not tilt so as to be particularly problematic. Therefore, even if the turntable drive device 5 is operated to be extended, there is no need to apply the extension restriction to the turntable drive device 5, so that the control device 9 is involved in the extension restriction of the turntable drive device 5. No signal is sent.

  However, when the load loading detection means 15 is in a non-detection state of the load on the loading platform and the boom 22 is in the forward storage state, they all have a function of moving the railcar center of gravity position forward. The center of gravity position of the current track-and-rail vehicle moves to the front side (dangerous side) beyond the allowable range that involves danger when the vehicle is levitated. In this manner, the overhang drive of the turntable drive device 5 is performed in a state where the load non-detection signal from the load loading detection means 15 and the boom forward turning position detection signal from the boom forward turning detection means 25 are output. When an operation signal (ON signal from the detection switch 53 in FIG. 4) is output to the control device 9, a control signal (in FIG. 4) that can prohibit the extension drive by the turntable drive device 5 from the control device 9. A signal for turning on the switch 81 of the electric circuit 8 is transmitted. Therefore, when the center of gravity position of the current track-and-rail vehicle is moving to the front side (dangerous side) beyond the permissible range that is dangerous when the vehicle is lifted and supported, the overhang drive is performed with respect to the turntable drive device 5. Even if the operation is performed, control is performed such that the overhang drive of the turntable drive device 5 can be prohibited (the levitation vehicle is not allowed to rise), so a dangerous levitation support state in which the lane ride vehicle tilts downward to the front side. Can be prevented in advance.

  1 is a vehicle, 2 is a work machine (crane work machine), 3 is an iron wheel, 4 is a turntable, 5 is a turntable drive device, 9 is a control device, 11 is a vehicle body, 12 is a tire wheel, 13 is a cab, 14 Is a loading platform, 15 is a load loading detection means, 25 is a boom forward turning detection means, 41 is a base plate, 43 is a ground plate, 51 is a jack cylinder, 52 is a switching valve, 53 is a detection switch, 76 is an unloading valve, A Is an alarm device, and B is an overhang prohibition control device.

Claims (1)

A working machine having four tire wheels for road surface traveling and four iron wheels for track traveling on the vehicle body, further provided with a loading platform on the vehicle body, and having a boom between the cab of the vehicle and the loading platform. In a land-rail vehicle equipped with
A turntable that extends below the vehicle body and supports the vehicle so as to be able to turn horizontally in a state where the grounding plate is in contact with the turntable, and is equipped at a position closer to the rear than the center of gravity of the rail vehicle;
A turntable drive device for extending and retracting the turntable, and
Luggage loading detection means for detecting whether or not the luggage is loaded on the loading platform;
Boom forward turning detection means for detecting that the boom is turning to a forward position of the vehicle;
An alarm signal is output and / or a tension by the turntable drive device is detected in a state where the load loading detection means is in a load undetected state and the boom forward turning detection means is in the boom forward position. A control device that outputs a control signal for prohibiting the output drive,
A turning table operation restricting device for a track and land vehicle characterized by the above.

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