JP2015006828A - Truck for maintenance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a truck for maintenance structured so as to automatically apply parking brake on two of a pair of front and rear bogie trucks at the same time when disconnected from a motor car and discharging compressed air into the atmosphere, and also so as to easily release the parking brakes only when moved.SOLUTION: The truck for maintenance where a loading platform frame 1 is supported by a pair of front and rear bogie trucks 2, 2, is structured so that an air brake cylinder swinging a first swing arm with compressed air is mounted on the loading platform frame 1, mechanical brake link mechanisms 20, 20 interlocked and connected with rod bars are set on the bogie trucks 2, 2 respectively, parking brakes are simultaneously applied on two of the pair of front and rear bogie trucks 2, 2 by resilient biasing force of a coil spring, and also the parking brake on two of the pair of front and rear bogie tracks 2, 2 are simultaneously released by parking-brake manually-releasing means 10 in disconnection-holding state.

Description

  The present invention relates to a maintenance truck.

2. Description of the Related Art Conventionally, a maintenance truck that supports a load receiving frame with a pair of front and rear bogies is known (see, for example, Patent Document 1).
Conventional maintenance trolleys did not have a brake mechanism in the load receiving frame. That is, only the air pipe is provided in the load receiving frame, and the brake cylinder and the brake link mechanism are separately installed in each of the bogies. The air piping of the load receiving frame and the brake cylinder of the bogie truck are connected to each other, and compressed air is supplied to each brake cylinder to apply the brake of the bogie truck (see, for example, Patent Document 2).

JP-A-10-278785 JP-A-8-258713

If the conventional maintenance truck is disconnected from the motor car and the compressed air in the air pipe is used up, there is a risk that the brake will not work and the vehicle will run away. In view of this, there has been proposed a configuration in which a handwheel handle is attached to each bogie, and the parking brake is manually applied by rotating the handwheel handle.
However, this handwheel handle is attached to each bogie, that is, it is provided at two places before and after the trolley, so when parking (detaining) the trolley, the operator turns the two handwheel handles. It was necessary to apply the parking brake to the two bogies separately. Also, when moving the trolley, the worker turns the two handwheel handles to release the parking brake, then moves the trolley and then turns the two handwheel handles again to apply the parking brake. Work was necessary and was very troublesome. Also, since the parking brake cannot be applied unless the operator consciously turns the handle, the trolley may run away if the parking brake is released and then forgotten to apply the parking brake. .

  Therefore, according to the present invention, when the connection with the motor car is disconnected and the compressed air is released to the atmosphere, the parking brake is automatically applied to the pair of front and rear bogies simultaneously, and the parking brake can be easily released only when moving. The purpose is to provide a maintenance truck.

  The maintenance trolley according to the present invention includes a pair of first oscillating arms and second oscillating arms that are interlocked and connected by a connecting rod in the maintenance trolley that supports the load receiving frame by a pair of front and rear bogies. A rod rod for transmitting a brake operation force pivotally attached to each of the first swing arm and the second swing arm, an air pipe for supplying compressed air, and the first swing arm are swung by the compressed air. An air brake cylinder to be moved is mounted on the load receiving frame, a third swinging arm pivotably attached to the load receiving frame, and the third swinging arm fixed to the load receiving frame. A parking brake release return cylinder connected to the arm, and a parking brake coil spring for elastically energizing the third swing arm, and each of the bogies is connected to the rod rod in conjunction with each other. Brake In the separated and detained state where the connection between the load receiving frame and the motor car is cut off and the compressed air in the air pipe is used up, the pair of front and rear are moved by the elastic biasing force of the coil spring. A parking brake manual release means having a handwheel handle that can be operated on the load receiving frame is provided so that two parking brakes can be applied simultaneously to the bogie. The parking brake manual release means is configured to simultaneously release two parking brakes of the pair of front and rear bogies.

In addition, the handwheel handle portion swings the third swing arm against the elastic urging force of the coil spring when a rotational force is manually applied, and the parking of the pair of front and rear bogies is performed. When the two brakes are released at the same time and the hand is released from the handwheel handle, it is automatically rotated in the reverse direction by the spring force of the coil spring, and the parking brake is automatically applied. It is a thing.
The return cylinder and the air brake cylinder are connected and integrated in series along the longitudinal direction of the vehicle body to form a connected cylinder body, and the connected cylinder body is connected to the coil spring in the separated state. The rod of the return cylinder is pulled in and the rod of the air brake cylinder is pushed out by the elastic urging force.

  According to the maintenance trolley of the present invention, the parking brakes of a pair of front and rear bogies can be simultaneously released by simply operating the (one place) handwheel handle on the load receiving frame. At the same time as the connection between the load carrier frame and the motor car is disconnected, the pair of bogies on the front and rear can be automatically parked and parked safely by the spring force of the coil spring. Escape due to forgetting or mistakes can be reliably prevented. The coil spring has excellent durability and can be used for a long time. Manufacturing costs can be reduced by omitting the air piping of two bogies.

It is the side view which showed one Embodiment of this invention. It is the figure which showed the load receiving stand frame, (A) is a top view, (B) is a side view. It is the side view which showed the load receiving stand frame and the bogie truck. It is the principal part enlarged plan view which showed the traction running state. It is the principal part enlarged plan view which showed the separation and detention state. It is the expanded sectional side view which showed the traction running state of the return cylinder and the air brake cylinder. It is the expanded sectional side view which showed the deceleration braking state of the return cylinder and the air brake cylinder. It is the expanded sectional side view which showed the separated state of the return cylinder and the air brake cylinder. It is the figure which showed the bogie truck, Comprising: (A) is an enlarged plan view, (B) is an enlarged side view, (C) is another enlarged side view. It is the enlarged side view which showed the parking brake manual release means. It is the simple figure which showed air piping. It is the graph which showed the spring characteristic of the coil spring.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
As shown in FIG. 1, the maintenance truck of the present invention is a (bogie type) track traveling truck that supports a load receiving frame 1 by a pair of front and rear bogies 2 and 2. For example, a crane 50 and a generator 51 are loaded on the load receiving frame 1.
As shown in FIGS. 2 and 3, the maintenance dolly of the present invention includes a pair of first swing arm 9, second swing arm 8, and first swing arm 9. Brake operating force transmitting rod rods 7 and 7 pivotally attached to the second swing arm 8 and the first swing arm 9 are swung by compressed air (connected to the first swing arm 9). An air brake cylinder 3 is mounted on the load receiving frame 1. Also, a third swing arm 6 pivotably attached to the load receiving frame 1, a parking brake release return cylinder 4 fixed to the load receiving frame 1 and connected to the third swing arm 6. And a parking brake coil spring 5 for elastically biasing the third swing arm 6.

As shown in FIGS. 4 and 5, the first swing arm 9 and the second swing arm 8 are installed in a letter C shape with a connecting rod 14 connected to an intermediate position in the longitudinal direction. The third swing arm 6 is disposed between the first swing arm 9 and the second swing arm 8, and is pivotally attached to the fixed portion of the load receiving frame 1. The second swing arm 8 is pivotally attached to the fixed portion of the load receiving frame 1 and is connected to the brake operating force transmission rod rod 7. The first swing arm 9 is connected to the rod rod 7 for transmitting the brake operating force and the rod 3a of the air brake cylinder 3, and is bulleted in the direction in which the rod of the air brake cylinder 3 is pulled by the tension spring 34 (always). It is energized. The air brake cylinder 3 is configured to push out the rod when the compressed air is supplied, and to swing the first swing arm 9 and the second swing arm 8 in conjunction with each other.
A parking brake coil spring 5 is connected to the third swing arm 6, and is elastically urged with an elastic urging force F. The rod 4a of the return cylinder 4 is connected to the third swing arm 6, and is elastically urged (always) in the direction of retracting the rod 4a of the return cylinder 4 by the elastic urging force F of the coil spring 5. . The return cylinder 4 is configured to push out the rod when compressed air is supplied, and to push in and hold the third swing arm 6 against the elastic urging force F of the coil spring 5.

The return cylinder 4 and the air brake cylinder 3 are connected and integrated in series along the longitudinal direction of the vehicle body to form a connected cylinder body 45.
As shown in FIG. 5, in the separated and detained state described later, in the connected cylinder body 45, the rod 4 a of the return cylinder 4 is pulled and the rod 3 a of the air brake cylinder 3 is pushed out by the elastic urging force F of the coil spring 5. (See FIG. 8). That is, as shown in FIG. 6, the return cylinder 4 is composed of a double rod cylinder (both rod cylinders) having rods on both sides of the piston. In the state where compressed air is supplied, the return cylinder 4 pushes out the rod 4a. As shown, in a state where compressed air is not supplied to the return cylinder 4, the rod 4 a is pulled (by the elastic urging force F of the coil spring 5) to push out the rod 3 a of the air brake cylinder 3. Therefore, as shown in FIG. 5, in the separated and detained state, the elastic urging force F of the coil spring 5 is applied to the first swing arm 9 via the rod 4a of the return cylinder 4 and the rod 3a of the air brake cylinder 3. The first swing arm 9 and the second swing arm 8 are swung in conjunction with each other.

Two coil springs 5 are made of metal and are used. In FIG. 12, the coil spring 5 is set so as to generate 48 kgf of tension (elastic urging force) at the initial moving end X of the operating stroke, and the spring constant K is set to 0.364 kgf / mm. ing.
As shown in FIGS. 4 and 5, the load receiving frame 1 is provided with a tension releasing means 41 for spring removal. The tension release means 41 has a rotary shaft 43 integrally having a worm gear 42 and a screw shaft 44 that is screwed by the worm gear 42, and forms a spring attachment portion 46 at the tip of the screw shaft 44. A stopper pin 47 for locking the screw shaft 44 is provided. The coil spring 5 is attached to the fixed portion of the load receiving frame 1 via the tension release means 41. The tension release means 41 includes an emergency handle 48 that can be attached to the rotary shaft 43. In the normal state, the emergency handle 48 is detached from the rotary shaft 43 and attached to the fixed portion of the load receiving frame 1. .

As shown in FIGS. 1 and 3, the bogies 2, 2 are provided with mechanical brake link mechanisms 20, 20 that interlock with the rod rods 7, 7, respectively. The rod rods 7 and 7 and the mechanical brake link mechanisms 20 and 20 are pivotally connected by connecting portions Z and Z. The bogie 2 has four wheels 40.
As shown in FIG. 9, the mechanical brake link mechanism 20 includes a connecting lever 21 that protrudes upward, and the connecting lever 21 is connected to the rod rod 7 by a connecting portion Z. The connecting lever 21 has a pivot shaft portion 22 inserted through a base end portion thereof, and is pivotally attached so as to be swingable in the front-rear direction. In addition, a pair of front and rear interlocking arms 23A and 23B arranged in a letter C shape and a connecting rod 24 connected to the intermediate position in the longitudinal direction of the interlocking arms 23A and 23B are provided. One of the arms 23 </ b> A is interlocked with a swing member 27. In this way, the connecting lever 21 and the pair of front and rear interlocking arms 23A and 23B are interlocked. As the interlocking arms 23A and 23B swing, the brake pressing members 25 and 25 connect the brake shoes 26 and 26 respectively. The wheel 40 is pressed against the wheel 40 to be brought into sliding contact, and the braking is performed by restricting the rotation by the frictional force. The pair of pressing members 25, 25 facing the wheel 40 are interlocked and connected by an interlocking mechanism having a turnbuckle 28. As described above, the mechanical brake link mechanism 20 is configured to apply the braking force evenly to the four wheels 40... And loads the crane 50, heavy heavy machinery and luggage on the maintenance truck of the present invention. Even in such a case, a highly reliable brake can be applied, and braking and detention can be performed safely.

As shown in FIG. 11, the load receiving frame 1 is provided with an air pipe 30 for supplying compressed air. The air pipe 30 includes a through brake pipe for a pressure reducing valve and a source pressure pipe 16 for an electromagnetic valve.
The main pressure pipe 16 is provided with couplers 35 and 35 for connecting to a traction motor car and a following vehicle. The air pipe 30 includes an EF control valve 31, a supply air tank 32 and a control air tank 33 for storing compressed air, a double check valve 36, a three-way cock (three-way valve) 37, an air tank 38, an electromagnetic And a valve unit 39. The valve unit 39 is connected to the return cylinder 4 and the air brake cylinder 3 and can supply compressed air. The supply air tank 32 and the control air tank 33 are provided with drain cocks.

  As shown in FIG. 4, in a traction running state in which the load receiving frame 1 is connected to a traction motor car and compressed air is supplied to the main pressure pipe 16, compressed air is supplied to the return cylinder 4 and the rod 4a is It is pushed out (see FIG. 6) and is held in a state where the third swing arm 6 is pushed in against the elastic urging force F of the coil spring 5. As shown in FIG. 7, compressed air is supplied from the supply air tank 32 and the control air tank 33 to the air brake cylinder 3, and the rod 3a is reciprocated to swing the first swing arm 9 and the second swing arm 8. The brake is applied to the bogies 2 and 2 for deceleration braking. This deceleration braking brake may be appropriately adjusted by electrical control of the motor car.

As shown in FIG. 5, the maintenance truck of the present invention has the elastic spring of the coil spring 5 in the cut and detained state in which the load carrier frame 1 and the motor car are disconnected and the compressed air in the air pipe 30 is used up. The parking force is applied to the pair of front and rear bogies 2 and 2 simultaneously by the urging force F.
When the compressed air in the supply air tank 32 and the control air tank 33 is used up or the drain pipe is opened and the air pipe 30 is opened to the atmosphere under the separated detention state, the compressed air is supplied to the return cylinder 4. The rod 4a is pulled in by the elastic urging force F of the coil spring 5 and pushes out the rod 3a of the air brake cylinder 3 (see FIG. 8). The first swing arm 9 and the second swing arm 8 swing, and the rod rods 7, 7 are pulled in the direction of the arrow. By pulling the rod rods 7 and 7 (inwardly), the mechanical brake link mechanisms 20 and 20 apply the parking brake to the pair of front and rear bogies 2 and 2.

As shown in FIGS. 1 to 3, a parking brake manual release means 10 having a handwheel handle portion 12 that can be operated on the load receiving frame 1 is provided, and the parking brake manual release means 10 in the separated state is provided. The two parking brakes of the pair of front and rear bogies 2 and 2 are simultaneously released.
As shown in FIG. 10, the parking brake manual release means 10 is swingable around a shaft center L and a handwheel handle portion 12 having a circular shape in plan view, a support column portion 11 standing on the load receiving frame 1. A pull rod portion 17 having a ball screw shaft portion (ball screw shaft) 13 pivotally attached, a ball nut 15 having a plurality of spheres and screwed to the ball screw shaft portion 13 through the sphere, and a pull rod portion 17 A release lever portion 18 pivotally attached to the lower end and pivoted in conjunction with the raising and lowering of the pull rod portion 17, and a release operating force transmission rod rod 19 linked to the release lever portion 18. Have. The rod bar 19 is connected to the third swing arm 6 (see FIGS. 2 and 3).
The parking brake manual release means 10 rotates the handwheel handle portion 12 to raise the pull rod portion 17 and rotate the release lever portion 18 to pull the rod rod 19 in the arrow direction. At this time, the rod bar 19 pulls the third swing arm 6 and applies a release operation force against the elastic urging force F of the coil spring 5.

In other words, the handwheel handle portion 12 swings the third swing arm 6 against the elastic urging force F of the coil spring 5 when a rotational force is manually applied, and a pair of front and rear bogies 2, 2 The two parking brakes are simultaneously released. Further, when the hand is released from the handwheel handle portion 12, it is configured to automatically rotate in the reverse direction (the handwheel handle portion 12) by the spring urging force F of the coil spring 5 and automatically apply the parking brake. Yes.
The parking brake manual release means 10 is configured such that the friction resistance between the ball screw shaft portion 13 and the ball nut 15 is small, and the handwheel handle portion 12 rotates lightly with a small force. Therefore, when the release lever portion 18 pulls the pull rod portion 17 (the lower end) downward, the ball nut 15 generates a rotational force on the ball screw shaft portion 13 and the handwheel handle portion 12 rotates in the reverse direction. That is, since the rotational friction resistance of the handwheel handle portion 12 is small, the handwheel handle portion 12 is automatically turned on unless the handwheel handle portion 12 is rotated in the brake releasing direction or held in the brake released state by hand. And the parking brake is automatically applied by the elastic biasing force F of the coil spring 5. Therefore, the conventional problem that the parking brake is not applied due to an operator's operation mistake or forgetting to apply is solved, and escape is surely prevented so that the vehicle can be placed in a safe state. When an operation force in the direction opposite to the brake release direction is applied to the handwheel handle portion 12, the brake force can be increased by an amount corresponding to the operation force.

  Although not shown, when the coil spring 5 is removed from the load receiving frame 1 due to a failure or maintenance, the emergency handle 48 attached to the fixed portion of the load receiving frame 1 is removed and the tension is removed. The release means 41 is attached to the rotating shaft 43 and rotated. The stopper pin 47 is removed, and then the screw shaft 44 is screwed in the direction in which the coil spring 5 is contracted. When the elastic force of the coil spring 5 has become sufficiently small, the coil spring 5 is removed from the spring attachment portion 46. When attaching the coil spring 5, the above operation is performed in the reverse order. In normal times, the emergency handle 48 is detached from the rotary shaft 43 and is attached to and stored in a predetermined portion of the fixed portion of the load receiving frame 1.

  As described above, the maintenance truck according to the present invention is a maintenance truck that supports the load receiving frame 1 by the pair of front and rear bogies 2, 2. The movable arm 9, the second swing arm 8, the rod rods 7 and 7 for transmitting the brake operation force pivotally attached to the first swing arm 9 and the second swing arm 8, respectively, and the compressed air supply An air pipe 30 and an air brake cylinder 3 that swings the first swing arm 9 by compressed air are mounted on the load receiving frame 1 and are pivotally attached to the load receiving frame 1 so as to be swingable. An arm 6, a parking brake release return cylinder 4 fixed to the load receiving frame 1 and connected to the third swing arm 6, and a parking brake coil spring 5 that elastically biases the third swing arm 6. In each of the bogies 2 and 2 The mechanical brake link mechanism 20, 20 linked to the rods 7, 7 is arranged, and the connection between the load receiving frame 1 and the motor car is disconnected and the compressed air in the air pipe 30 is used up. In addition, it is configured such that two parking brakes are simultaneously applied to the pair of front and rear bogies 2 and 2 by the elastic urging force F of the coil spring 5, and further, a handwheel handle portion 12 operable on the cargo receiving frame 1 is provided. Since the parking brake manual release means 10 is provided and the parking brake manual release means 10 is used to release the parking brakes of the pair of front and rear bogies 2 and 2 at the same time in the separated state. The parking brakes of the pair of front and rear bogies 2 and 2 can be released simultaneously only by operating the (one place) handwheel handle portion 12 on the load receiving frame 1. At the same time as the connection between the load carrier frame 1 and the motor car is cut off, the pair of front and rear bogies 2 and 2 can be automatically parked and placed safely by the elastic force F of the coil spring 5. It is possible to reliably prevent a worker from forgetting to use the parking brake or operating mistakes. Further, the coil spring 5 is excellent in durability and can be used for a long time. Manufacturing costs can be reduced by omitting the air piping of the two bogies 2 and 2.

  Further, the handwheel handle portion 12 swings the third swing arm 6 against the elastic urging force F of the coil spring 5 when a rotational force is manually applied, and the pair of front and rear bogies 2, 2 When the two parking brakes are released at the same time and the hands are released from the handwheel handle portion 12, it is automatically rotated in the reverse direction by the spring urging force F of the coil spring 5 so that the parking brake is automatically applied. Because it is configured, it can be detained in a safe state, preventing overruns due to operator error or forgetting to hook.

  The return cylinder 4 and the air brake cylinder 3 are connected and integrated in series along the longitudinal direction of the vehicle body to form a connected cylinder body 45. Under the separated state, the connected cylinder body 45 includes the coil spring 5. Since the rod 4a of the return cylinder 4 is pulled in and the rod 3a of the air brake cylinder 3 is pushed out by the elastic urging force F, it can be installed compactly, and the first swing arm 9 and the second swing arm 9 can be installed. The brake operating force can be reliably transmitted to the swing arm 8 and a highly reliable brake can be applied.

DESCRIPTION OF SYMBOLS 1 Load receiving frame 2 Bogie bogie 3 Air brake cylinder 3a Rod 4 Return cylinder 4a Rod 5 Coil spring 6 Third swing arm 7 Rod rod 8 Second swing arm 9 First swing arm 10 Parking brake manual release means 12 Manual rotation Handle part 14 Connecting rod 20 Mechanical brake link mechanism 30 Air piping 45 Linked cylinder body F Bullet energizing force

Claims (3)

In the maintenance dolly that supports the load receiving frame (1) by the pair of front and rear bogies (2) and (2),
A pair of the first swing arm (9) and the second swing arm (8), which are interlocked and connected by the connecting rod (14), and the first swing arm (9) and the second swing arm (8). The rod rods (7) and (7) for transmitting the brake operating force pivoted to each, the air pipe (30) for supplying compressed air, and the first swing arm (9) are swung by the compressed air. An air brake cylinder (3) to be mounted on the load receiving frame (1), a third swing arm (6) pivotably attached to the load receiving frame (1), and the load receiving frame A parking brake release return cylinder (4) fixed to the frame (1) and connected to the third swing arm (6), and a parking brake for resiliently urging the third swing arm (6) Coil springs (5) for each of the bogies (2) and (2). Mechanical brake linkage (20) for interlocking connection to (7) (20) is arranged to,
In the state where the load carrier frame (1) is disconnected from the motor car and the compressed air in the air pipe (30) is used up, the spring force (F) of the coil spring (5) is released. Is configured so that two parking brakes are simultaneously applied to the pair of front and rear bogies (2) and (2).
Furthermore, it comprises a parking brake manual release means (10) having a hand-operated handle portion (12) operable on the load receiving frame (1), and the parking brake manual release means in the separated state. A maintenance dolly characterized by (10), wherein the two parking brakes of the pair of front and rear bogies (2) and (2) are simultaneously released.   The hand turning handle portion (12) swings the third swing arm (6) against the elastic biasing force (F) of the coil spring (5) when a rotational force is manually applied. When the two parking brakes of the pair of front and rear bogies (2) and (2) are released at the same time and the hands are released from the handwheel handle portion (12), the elastic biasing force of the coil spring (5) The maintenance trolley according to claim 1, wherein the parking trolley is configured to automatically rotate in the reverse direction according to (F) and automatically apply the parking brake. The return cylinder (4) and the air brake cylinder (3) are connected and integrated in series along the longitudinal direction of the vehicle body to constitute a connected cylinder body (45).
In the separated and detained state, the connected cylinder body (45) is retracted by the rod (4a) of the return cylinder (4) by the elastic biasing force (F) of the coil spring (5) and the air brake. The maintenance dolly as claimed in claim 1 or 2, wherein the rod (3a) of the cylinder (3) is pushed out.

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