JP2003104017A - Tow car traveling on rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To regulate rotation of a steering wheel in a period when traveling on a rail and when the steering wheel is floated from a general road, and to prevent traveling to an unexpected direction when a change is generated from the traveling on the rail to traveling on the general road. SOLUTION: A steering device 1 is a tilt type one of which the upper steering shaft 4 and the lower steering shaft 6 are connected tiltably. A stopper bracket 22 having a cut-out part 22a is provided in a shaft cover 9 covering the lower steering shaft 6 and rotating integrally therewith. A stopper plate 23 is engaged disengageably with the cut-out part 22a of the stopper bracket 22 via a link mechanism 31 by an operation lever 24, so as to lock the wheel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail traveling towing vehicle capable of traveling not only on a general road but also on an orbit and towing a freight car, and more particularly to a handle lock device for such a rail traveling towing vehicle.

[0002]

2. Description of the Related Art Conventionally, a wheel that can run on a general road, a ring wheel that can roll on a track, and a steering device that steers the wheel have been provided and can run on a track along with a general road. A rail traveling towing vehicle used to pull a freight car is known (see, for example, Japanese Utility Model Laid-Open No. 6-65017). Such a rail-driven towing vehicle tows a freight car on a rail, such as in a freight station yard, and in this towing vehicle, when traveling on a rail, the orbital wheels of the tow vehicle make contact with the rail and roll. The wheels are driven (the steered wheels are levitating from the road surface of the general road), and the wheels driven by the engine come into contact with and drive the road surface of the general road adjacent to the rail. on the other hand,
Among the traveling wheels, the steered wheels are steered as the steering wheel provided in the driver's cab of the towing vehicle rotates.

Specifically, as shown in FIGS. 7 and 8, such a towing vehicle 101 has a vehicle body 103 having a driver's cab 102 provided at an upper portion thereof, and front and rear wheels for traveling on a general road. 104 and 105 (pneumatic rubber wheels, solid tires or flat tires) are provided. Couplers 106 and 107 are provided in front of and behind the vehicle body 103, respectively. The front wheels 104 are driving wheels, and the rear wheels 105 are steering wheels.

When the towing vehicle 101 travels on the general road A, the front hydraulic cylinder 111 is shortened and the rear hydraulic cylinder 112 is shortened. Then, the front hydraulic cylinder 111 causes the front lifter 11 to move.
3 is moved up, and the front bearing ring 114 (iron ring for race) is on the track B.
And the front wheels 104 are brought into contact with the general road A, and the rear hydraulic cylinder 112 causes the rear lift 11 to move.
3 is lifted, the rear race wheel 115 is separated from the raceway, and the rear wheel 105 is brought into contact with the general road. Then, while the front wheels 104 are rotationally driven by the engine 116,
When the rear wheels 105 are steered, the vehicle can normally travel on a general road.

On the other hand, when traveling on the track B, the vehicle body switch of the automatic control device (not shown) is turned on,
The front hydraulic cylinder 11 is connected via a hydraulic circuit (not shown).
1 is extended. The rear hydraulic cylinder 112 is extended by operating the cargo handling lever. Then, the front lift cylinder 113 is lowered by the front hydraulic cylinder 111,
The front wheels 114 are brought into contact with the track and the front wheels 104 are
While being in contact with the general road A adjacent to the track B, the rear lifting cylinder 113 is lowered by the rear hydraulic cylinder 112,
The rear race wheel 115 is brought into contact with the raceway B and the rear wheel 105 is separated from the general road. When the front wheels 104 are rotationally driven by the engine 116, the front wheels 104 can travel along the track B, and the front and rear couplers 106 and 107 can connect and pull the freight cars.

[0006]

However, the tractor vehicle 101
When the steering wheel 123 of the cab 102 is rotated while the vehicle travels on the track B as described above and the rear wheel 105, which is a steered wheel, is levitating from the general road A, the rear side that is a steered wheel The wheels 105 are steered into an angled state to the left or right. When this state is maintained and the towing vehicle 101 is switched from traveling on the track B to traveling on the general road A, the rear wheels 105 contact the ground and the towing vehicle 101 travels in an unexpected direction. Become.

In order to prevent such unexpected traveling in the direction, as a device for preventing the rotation of the steering handle, for example, a handle lock device as shown in FIG. 9 is used. This device is a handle stopper 1
The U-shaped member 122 formed at the upper end by lifting the knob 121a of the steering wheel 21 upward from the steering handle 12
The steering wheel 123 is held in a locked state by being locked to the steering wheel spokes 123a of No. 3 of FIG.
At this time, the knob 121a is locked by the locking portion 121c at the upper end of the guide groove 121b, and the handle lock state is maintained. Then, when the knob 121a is unlocked from the locking portion 121c, the U-shaped member 12
2 is the steering wheel spoke 1 of the steering wheel 123
Since the spring 124 biases the U-shaped member 122 in the direction to release the locking with the steering wheel 23a, the U-shaped member 122 is displaced downward by the spring force of the spring 124, so that the steering wheel 123 is locked with the steering wheel spokes 123a. It will be canceled. In addition, the handle stopper 121
The lower end of is attached to the front guard 126 of the towing vehicle via a bracket 125.

Such a handle lock device can be used when the steering handle 123 is a fixed type steering handle in which the angle cannot be adjusted back and forth, but in the case of a tilt type steering device where the angle can be adjusted, the steering handle is moved back and forth. Therefore, the U-shaped member 122 of the steering wheel stopper 121 comes off from the steering wheel spoke 123a.
You can't lock 3.

By the way, as a steering wheel lock device for a vehicle equipped with such a tilt type steering device in which a steering handle moves back and forth, Japanese Patent Laid-Open No. 5-3215
As described in Japanese Patent No. 1, there is one that blocks the rotation of the steering shaft with the ignition switch turned off.

This device is a steering shaft with a tilt mechanism, in which a locking rod is slidably disposed in a rod housing formed integrally with an ignition key cylinder, and the tip end of the locking rod is a lock recess of the steering shaft. Configured to engage and disengage
This device suppresses the steering operation of the steering wheel, but this device locks the steering wheel when the vehicle is stopped, and when the towing vehicle is running on the rail and the steered wheels are floating from the general road. Moreover, it cannot be used as it is to lock the steering wheel. Also,
Since the ignition key cylinder is used, high processing accuracy of parts is required, the structure is complicated, and the cost is high.

According to the present invention, the rotation of the steering wheel is regulated while traveling on the rail and the steered wheels are floating from the ordinary road, and when the rail traveling is switched to the traveling on the ordinary road, the direction is unexpected. An object of the present invention is to provide a rail traveling towing vehicle capable of preventing traveling.

[0012]

According to a first aspect of the present invention, a wheel capable of traveling on a general road, a race wheel capable of traveling on a track, a steering device for steering the wheel, and the vicinity of the steering device. A rail traveling towing vehicle equipped with a handle lock device that prevents rotation of the steering handle of the steering device when traveling on a track while being able to freely rotate the steering handle when traveling on a general road. The steering device is a tilt type steering device in which an upper steering shaft and a lower steering shaft are tiltably connected to each other, and the handle lock device is provided on the lower steering shaft or a shaft cover that rotates integrally with the lower steering shaft. The stopper bracket provided with the notch and this stopper -A stopper plate provided so as to be removably engaged with the bracket, and an operation that is linked to the stopper plate via a link mechanism, and releasably engages the stopper plate with the cutout portion of the stopper bracket. And a lever. Here, "provided on the lower steering shaft or the shaft cover that rotates integrally with the lower steering shaft" means that the lower steering shaft that extends upward from the steering gear box is covered with a stopper bracket that rotates integrally with the lower cover. This means that the portion where the bracket is provided does not have a shaft cover and the case where the stopper bracket is provided directly on the lower steering shaft is included.

With this configuration, the rotation of the lower steering shaft of the tilt type steering device or the shaft cover that rotates integrally with the lower steering shaft of the tilt type steering device is controlled by the operation of the stopper plate and the notch portion of the stopper bracket. It becomes possible to prevent it by a relationship. Therefore, it is possible to easily realize the switching between the steering wheel locked state and the unlocked state by operating the operation lever.

Further, since the steering wheel lock device can be provided at a position looking down from the driver's seat, the positional relationship between the stopper plate and the notch portion of the stopper bracket can be easily confirmed. Therefore, in the case of Japanese Unexamined Patent Publication No. 5-32151, it is impossible to confirm with the eyes of the driver.
According to the invention described above, the handle lock device can be confirmed by the driver's eyes, and the stopper plate can be easily aligned with the notch portion of the stopper bracket.

According to a second aspect of the present invention, the link mechanism includes a first link arm which is located on either the left or right front side of the steering device and which is provided with the operation lever, and a lower side of the first link arm. A second link arm that is located and provided with the stopper plate, and a joint rod that connects the first link arm and the second link arm may be provided.

With this configuration, the handle lock state or the unlock state can be easily switched by operating the operation lever using the simple link mechanism. Further, high processing accuracy of parts is not required and the number of parts is small, which is advantageous in cost.

Further, as described in claim 3, the first and second link arms are attached to the front guard located on the front side of the steering device through the first and second link brackets, respectively. It is also possible to do so.

With this arrangement, the first and second link brackets can be used as common parts, which is advantageous in terms of cost. Moreover, since the first and second link brackets can be attached to the front guard immediately in front of the steering device, they can be easily attached.

According to a fourth aspect of the present invention, the front guard includes a first engaging hole portion that engages the stopper plate with the notch portion of the stopper bracket.
A guide plate having a second engaging hole portion for releasing the engagement of the stopper plate with the cutout portion of the stopper bracket is provided, and the stopper plate is cutout by the operation of the operation lever. It is preferable that a return spring is provided between the first link arm and the front guard via the spring bracket in order to engage the portion and maintain the steering wheel locked state.

With this arrangement, the handle lock state can be maintained due to the relationship between the engagement holes (first and second engagement hole portions) of the guide plate and the return spring. Further, since the spring bracket can be attached using the front guard in the immediate vicinity, the spring bracket can have a simple shape.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing a schematic structure of a handle lock device for a rail traveling tow vehicle according to the present invention, and FIG. 2 is an exploded perspective view of the same.

As shown in FIG. 1, the rail traveling towing vehicle according to the present invention includes a tilt type steering device 1 for steering wheels when traveling on a general road. And
When traveling on the track B, a steering wheel locking device 21 that prevents the steering handle 2 of the tilt type steering device 1 from rotating and allows the steering handle 2 to rotate freely when traveling on the general road A is provided. It is provided near the steering device 1.

The steering device 1 is provided on the rear side of the front guard 3, and has a lower end portion of an upper steering shaft 4 provided with a steering handle 2 at an upper end portion thereof and a lower steering portion having a lower end portion thereof connected to a steering gear box 5. The upper end of the shaft 6 is connected via a joint fitting 7 so as to be tiltable. Reference numeral 8 is a steering column, 9 is a shaft cover that covers the periphery of the lower steering shaft 6 and rotates integrally with the lower steering shaft 6, and 10 is a floor board.

On the other hand, the handle lock device 21 is provided with a stopper bracket 22 fixedly attached to the lower portion of the shaft cover 9 and a stopper plate 23 provided so as to be removably engaged with the stopper bracket 22.
And an operation lever 24 that is linked to the stopper plate 23 via a link mechanism 31 and that disengageably disengages the stopper plate 23 from the notch 22a (see FIGS. 2 and 5) of the stopper bracket 22. Is equipped with. Here, the stopper bracket 22 is attached and fixed to the shaft cover 9. However, when such a shaft cover is not provided, the stopper bracket 22 may be directly provided on the lower steering shaft 6.

As shown in FIG. 2, the stopper bracket 22 has a bracket front 22A and a bracket rear 22B mounted so as to sandwich the shaft cover 9, and is fastened and fixed using bolts 23, washers 24 and nuts 25. It is supposed to do. Both the bracket front 22A and the bracket rear 22B have mounting portions 22Aa and 22Ba having engaging recesses 22b that are engaged with the shaft cover 9, and the mounting portions 22Aa and 22Ba.
Flange portions 22Ab and 22Bb provided on the upper end of the
The notch 22a is formed in b.

As shown in detail in FIGS. 2 to 6, the link mechanism 31 has a first link arm 33 provided with the operation lever 24 located on the left front side of the steering device 1.
And a second link arm 34 below the first link arm 33 and provided with the stopper plate 23, and a joint rod for connecting the first link arm 33 and the second link arm 34. 35 and.

The first link arm 33 is a cylindrical body 3
3a, the first and second arm portions 33 are arranged radially outward.
b and 33c are provided so as to project, the upper end of a return spring 53 (coil spring) is connected to the first arm portion 33b as described later, and the second arm portion 3
3c includes an upper yoke 35 of the joint rod 35.
a is connected using a connecting pin 81 having a split pin hole, a washer 82, and a split pin 83.

Further, the main body portion 3 of the first link arm 33
3a includes the first and second arm portions 33b, 33.
A shaft portion 33d for connecting the operation lever 24 is provided so as to project in a direction opposite to c. That is,
The operating lever 24 has a tubular portion 24a that is externally fitted to the shaft portion 33d, and an operating portion 24b for gripping, and the tubular portion 24a is externally fitted to the shaft portion 33d, and the washer 39 and the split portion. It is attached using the pin 40. The shaft 3
Split pin holes 33e are provided at the tip of 3d.

Like the first link arm 33, the second link arm 34 also has a cylindrical main body portion 34a, a first arm portion 34b and a second arm portion, and the first arm portion 34b. The lower yoke 3 of the joint rod 35.
5b are connected using a connecting pin 81 having a split pin hole, a washer 82, and a split pin 83. The second arm portion serves as the stopper plate 23, and
Of the arm portion 34b is projected to the opposite side.

The first link arm 33 and the second link arm 34 are attached to the front guard 3 located on the front side of the steering device 1 and the first link bracket 36.
And a second link bracket 37 so as to be rotatable about a rotation axis in a substantially horizontal direction.

More specifically, the first and second link brackets 36 and 37 respectively include a bolt 61 and a washer 6 on the front guard 3 as shown in FIGS. 2, 4 and 5.
2 and the mounting portions 36a and 37a having a substantially rectangular plate shape, which are mounted via the nut 63, and the mounting portions 36a and 37a.
The left and right side portions 36 extending in the direction orthogonal to the both side portions of the
b, 36c and 37b, 37c, and has a U-shaped horizontal cross section. Then, the left and right side portions 36b, 36
Through holes 36d and 37d are provided in c and 37b and 37c, and screw holes 36e and 37e are further provided in one of the side portions 36c and 37b. Then, the arm shaft 42 erected from the rectangular plate-shaped head plate 41
However, until the head plate 41 comes into contact with the side portions 36c and 37b, the arm shaft 42 is inserted into the through holes 36d and 37d.
It is adapted to be attached and fixed with bolts 43.

As shown in FIG. 6, the operating lever 24 has a guide plate 51 provided on the front guard 3.
Through the engaging hole 52 of the above. The engagement hole 52 has a first engagement hole portion 52a, a second engagement hole portion 52b, and a communication portion 52c that communicates them, and the operation lever 24 has the first engagement hole portion. 52a, the notch 22a of the stopper bracket 22
When the stopper plate 23 is engaged with the stopper plate 23 in a disengageable manner and is located in the second engagement hole portion 52b, the notch portion 2 of the stopper bracket 22 is formed.
The stopper plate 23 is not engaged with 2a. The first arm portion 33b of the first link arm 33 is connected to the front via the return spring 53 so that the operation lever 24 maintains the engagement state with the first or second engagement hole portions 52a and 52b. It is linked to a spring bracket 54 fixed to the guard 3.

In this way, by operating the operating lever 24, the rotation of the shaft cover 9 that rotates integrally with the lower steering shaft 6 of the tilt type steering device 1 is prevented from rotating between the stopper plate 23 and the stopper bracket 22. It becomes possible to prevent by the engagement relationship with the notch portion 22a. Therefore, by operating the operation lever 24, it is possible to easily switch the handle lock state or the unlock state.

Further, since the handle lock device 21 can be provided at a position looking down from the driver's seat, the position of the notch 22a of the stopper bracket 22 can be easily confirmed. Therefore, the locked state can be confirmed by the eyes of the driver, and the stopper plate 23 can be easily aligned with the cutout portion 22a of the stopper bracket 22. In addition, since the steering wheel lock device 21 is provided in the vicinity of the steering device 1, the operation of each component can be confirmed from the driver's seat.

In particular, using the simple link mechanism 31,
Since the handle lock state or the unlock state is switched by operating the operation lever 24, high processing accuracy of parts is not required and the number of parts is small, which is advantageous in terms of cost.

Furthermore, the first and second link brackets 36 and 37 can be made into common parts, which is advantageous in terms of cost. Further, since the first and second link brackets 36 and 37 can be attached to the front guard 3 located just in front of the steering device 1, the attachment is also easy.

Further, the engaging hole 5 of the guide plate 51
Due to the relationship between the 2 (first and second engagement hole portions 52a, 52b) and the return spring 53, the handle lock state can be maintained. Further, since the spring bracket 54 is attached by using the front guard 3 in the immediate vicinity, the bracket having a simple shape can be obtained.

[0039]

The present invention is implemented as described above and has the following effects.

According to the invention of claim 1, the steering wheel can be locked or unlocked by operating the operation lever on the left side of the steering wheel, and the labor can be reduced by a simple operation. Also, since the stopper bracket is installed in a position to look down from the driver's seat, the position of the notch of the stopper bracket can be easily checked, making it easy to align with the stopper plate (the locked state can be checked by the driver's eyes). it can).

The invention of claim 2 is advantageous in terms of cost because high machining accuracy of parts is not required and the number of parts is small.

According to the third aspect of the invention, the first and second link brackets can be common parts, which is advantageous in terms of cost. Further, since the first and second link brackets are attached to the front guard immediately in front of the steering device, they can be easily attached.

According to the fourth aspect of the invention, since the return spring is provided, the handle lock state can be maintained. Since the spring bracket is attached by using the front guard in the immediate vicinity, the bracket can have a simple shape.

[Brief description of drawings]

1 is a cross-sectional view taken along the line AA of FIG. 3, showing a handlebar lock device of a rail traveling tow vehicle according to the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a view on arrow B in FIG.

FIG. 4 is a view taken in the direction of the arrows CC in FIG.

5 is a view taken in the direction of arrows D-D in FIG.

FIG. 6 is a view in the direction of arrow H in FIG.

FIG. 7 is a side view of a conventional rail traveling towing vehicle.

FIG. 8 is an explanatory diagram of traveling of a conventional rail traveling towing vehicle.

FIG. 9 is an explanatory diagram of a conventional handle lock device.

[Explanation of symbols]

1 Tilt type steering device 2 steering wheel 3 front guard 4 Upper steering shaft 6 Lower steering shaft 9 Shaft cover 21 Handle lock device 22 Stopper bracket 22a Notch 23 Stopper plate 24 Control lever 31 Link mechanism 33 First Link Arm 34 Second Link Arm 35 joint rod 51 guide plate 52 engagement hole 52a First engaging hole portion 52b Second engaging hole portion 52c communication part 53 Return spring 54 spring bracket

Claims (4)

[Claims] 1. A wheel capable of traveling on a general road, a bearing wheel capable of traveling on a track, a steering device for steering the wheel, and a vehicle provided near the steering device when traveling on the track. A rail traveling towing vehicle including a steering wheel lock device that prevents rotation of a steering handle of the steering device while allowing rotation of the steering handle when traveling on a general road, wherein the steering device comprises an upper steering shaft. And a lower steering shaft is a tilt-type steering device that is tiltably coupled, wherein the handle lock device is a stopper bracket that has a notch portion provided on the lower steering shaft or a shaft cover that rotates integrally with the lower steering shaft, Removably engaged with this stopper bracket A stopper plate provided so as to be provided, and an operating lever that is linked to the stopper plate via a link mechanism and that engages the stopper plate with a notch portion of the stopper bracket in a disengageable manner. Rail driven towing vehicle. 2. The link mechanism includes a first link arm which is located on either the left or right front side of the steering device and which is provided with the operation lever, and the stopper plate which is located below the first link arm. The rail traveling towing vehicle according to claim 1, further comprising: a second link arm provided, and a joint rod connecting the first link arm and the second link arm. 3. The first and second link arms include:
3. The rail traveling towing vehicle according to claim 2, wherein each of said rail guards is attached to a front guard located on the front side of said steering device via first and second link brackets. 4. The front guard has a first engaging hole portion for engaging the stopper plate with the notch portion of the stopper bracket, and an engagement of the stopper plate with the notch portion of the stopper bracket. A guide plate having a second engagement hole portion for releasing the handle is provided, and the stopper plate is engaged with the notch portion of the guide plate by the operation of the operation lever to maintain the handle lock state, The rail traveling towing vehicle according to claim 3, wherein a return spring is provided between the first link arm and the front guard via the spring bracket.