JPH0631035B2 - Vehicle type switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a vehicle type switching in which pneumatic circuits are switched to respective clamping devices according to the vehicle type of a vehicle body mounted on a truck moving on a truck. Regarding the device.

[Conventional technology]

For example, in a vehicle body assembly process for joining press-formed panel parts by spot welding, the vehicle body is mounted on the stage 1 on a plurality of carriages that move in the direction of the arrow on a track that constitutes a line as shown in FIG. In the case of extracting and putting in, the pneumatic circuit on the truck side for clamping and unclamping the clamp device provided on the truck side is connected to the pneumatic pressure source provided on the track side via the autojoint 2.

2. Description of the Related Art Conventionally, as a vehicle body fixing device on a bogie, for example, as shown in FIG. 11, there is known a vehicle body provided with a clamp device for fixing only one car body.

To briefly explain this, the bogie 4 on which the vehicle body 3 is mounted has four vehicle bodies 3 provided at two locations on the front and rear sides in total.
Clamping Device 5 for Clamping, and Pneumatic Circuit 20 for Actuating These Clamping Devices 5 (See FIG. 12)
And three sets of auto joints 2 for connecting the pneumatic circuit 20 on the dolly side to the pneumatic circuit 10 on the track 6 side.

As shown in FIG. 12, the pneumatic circuit 10 on the side of the track 6 includes an air source 11, a pressure regulator 12 for adjusting the pressure of the air source, and solenoids 13A, 13B for adjusting the regulated air.
Autojoint connection parts 2A, 2B, 2 via 13C
Double-acting cylinders 14A, 14B, 14C for supplying to C
And a pressure switch 15 for detecting conduction / non-conduction of air.

On the other hand, the automatic joint connecting portions 2A, 2 on the track 6 side
The pneumatic circuit 20 on the trolley 4 side coupled to B and 2C supplies the air supplied to the trolley 4 side through the automatic joint coupling portions 2A and 2B to the check valves 21A and 21B and the shuttle valve 22.
A, 22B, flow rate adjusting valves 23A ₁ , 23A ₂ ; 23
B ₁ , 23B ₂ ; 23C ₁ , 23C ₂ ; 23D ₁ , 23
Double-acting cylinders 24A, 24B, 24C, 24D which are supplied via D ₂ and actuate the aforementioned clamping device 5.
And each of the clamp devices 5 has a valve member, that is, a limit valve 25A, 25B, 25C, 25D which is attached to each of the clamp devices 5 and is connected in series between the automatic joint coupling portions 2B, 2C.

In the pneumatic circuit 20 on the bogie 4 side, 26A, 26
In the case of an emergency, B is a quick connect that can remove the clamp device by supplying air from the outside.
7 is a silencer.

Now, when it is detected that the carriage 4 has reached the predetermined stage 1 of the track 6 by a limit switch (not shown),
The electromagnetic switching valves 13A and 13C are switched respectively, and the air of the air source 11 regulated by the pressure regulator 12 is supplied to the head side (the lower side of the piston in the drawing) of the cylinders 14A and 14C of each autojoint 2. By projecting at each piston rod, the autojoint coupling portions 2A and 2C are coupled, and the pneumatic circuits on the track side and the truck side are electrically connected. The joint bond 2B is kept in a blocked state.

As a result, the air from the air source 11 passes through the autojoint connecting portion 2A, the check valve 21A, the shuttle valve 22A, the flow rate adjusting valves 23A ₁ , 23B ₁ , 23C ₁ , 23D _1, and the cylinders 24A, 24B, 24C ,. 24D flows into the head side (left side of the piston in the figure) and drives each piston to the right side in the figure to operate the clamp device 5 (Fig. 11) to fix the vehicle body 3 to the trolley 4 and its operation. The limit valves 25A, 25B, 25C, and 25D become non-conductive in conjunction with.

When an unclamp command is issued after a predetermined welding operation or the like is performed in this state, the electromagnetic switching valves 13A and 13B of the autojoint 2 are switched so that the autojoint connecting portion 2B is connected and is in a conductive state. Then, 2A is released from the bond and becomes in the blocking state. Thereby, air in the air source 11, the auto Jiyo Into coupling portion 2B, the check valve 21B, the shuttle valve 22B, the flow control valve _{23A 2,} 23B 2, 23C
₂ , 23D ₂ through the cylinders 24A, 24B, 24
It flows into the rod side of C and 24D (the right side of the piston in the figure), drives each piston to the left side in the figure, and releases the clamp of the clamp device 5.

The limit valve 25 is interlocked with the fixing release of the clamp device 5.
A, 25B, 25C and 25D are in a conductive state, and the pressure switch 15 detects this and indicates that the truck 3 is in an unclamped state.

Further, there is a trolley provided with a clamp device as disclosed in JP-A-48-85445. To operate the clamp device, an outside of the trolley is used in the same manner as described above via an autojoint or the like. It is common to send pressurized air from.

[Problems to be solved by the invention]

However, in such a conventional vehicle body fixing device on a bogie, the number of vehicles to be fixed on the bogie is limited to one vehicle type. It was impossible to put this into practical use, because we had to prepare a dolly for each and replace it each time.

Further, in order to solve this problem, a plurality of sets of clamp devices capable of fixing a plurality of vehicle types to each other are provided on the same carriage, the mounted vehicle types are electrically detected, and a solenoid valve or the like is operated to deal with each of them. It is possible to supply air only to the clamp device, but in this case, the pneumatic circuit 10 on the track 6 side shown in FIG. 12 and the pneumatic circuit 20 on the truck 3 side are connected to the pneumatic circuit 10. It is necessary to provide a plurality of sets of auto-joint connecting portions 2A, 2B, 2C each having a complicated structure for connection.

Therefore, the switching control for electrically detecting the vehicle type on the trolley 3 and switching a plurality of sets becomes complicated, and the pneumatic circuits on the trolley side and the track side and the complicated auto-joint coupling part having a structure for coupling these are formed. Not only was the cost doubled and the cost of the device increased, but there was also a high risk of breakdowns and other problems, and there was a problem in terms of maintainability.

An object of the present invention is to provide an on-vehicle vehicle type switching device that can solve the above-mentioned conventional problems.

[Means for solving problems]

Therefore, the bogie vehicle type switching device according to the present invention has an operating position for pneumatically fixing the vehicle body of any one of a plurality of vehicle types mounted on a truck moving on a truck, and a vehicle body fixing operation. In a bogie vehicle type switching device having a plurality of sets of clamp devices which are operated in an inoperative position to be released, and pneumatic circuits on the truck side and the bogie side for supplying air to the clamp devices via an automatic joint coupling part. , A plurality of limit valves for detecting the vehicle type of the vehicle body mounted on the carriage and switching the pneumatic circuit on the carriage side to the corresponding clamp device side are provided on the carriage, and each of the plurality of clamp devices is provided. When the attached clamp device is operated to the inoperative position, the valve member that operates to the conduction position that allows the air to flow is connected to the pneumatic circuit on the trolley side and the vacant side on the trolley side. Characterized in that provided in series between the pressure detection means for detecting the pressure in the circuit.

[Work]

With the above-mentioned configuration, the air source and the pneumatic circuit provided on the track side, the autojoint connecting portion that connects the pneumatic circuits on the track side and the truck side, and the like are the conventional vehicle body fixing devices for one vehicle type. The vehicle body of each vehicle type can be securely fixed only by switching the pneumatic circuit on the trolley side to the corresponding clamp device side by the limit valve for vehicle type detection.

Further, each clamp device is provided with a valve member provided in series between an air pressure circuit on the truck side and a pressure detecting means for detecting the pressure in the air pressure circuit on the truck side. When the attached clamp device is operated to the inoperative position, this valve member is operated to a conduction position where air can be conducted, so that the pneumatic circuit and the pressure detection means are conducted.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 9 of the accompanying drawings.

FIG. 1 shows an example of a pneumatic circuit for applying the vehicle-mounted vehicle type switching device according to the present invention to a vehicle body fixing device capable of clamping two vehicle types. The pneumatic circuit 10 on the track 6 side and the pneumatic circuit 10 are shown. The automatic joint connecting portions 2A, 2B and 2C for connecting the to the pneumatic circuit 30 on the trolley 4 side are the same as those of the conventional example shown in FIG.

Each connecting part 2A, 2B, 2C of three sets of auto joints 2
The pneumatic circuits 30 on the trolley 4 side, which are respectively coupled to each other, are the pneumatic circuit 30A on the clamp side coupled to the coupling portion 2A and the pneumatic circuit 30 on the unclamp side coupled to the coupling portion 2B side.
B and a pneumatic circuit 30C for unclamping confirmation, which is coupled to the coupling portion 2C side.

The pneumatic circuit 30A comprises a check valve 31A, a shuttle valve 32A, a switching valve 33A, a limit valve 34A and a quick joint 36A, and the pneumatic circuit 30B comprises a check valve 31B, a shuttle valve 32B, a switching valve 33B, a limit valve. It is composed of a valve 34B and a quick joint 36B.

Then, the cylinders 41A ₁ , 41A ₂ , 41A ₃ , 41A ₄ , 4 which operate the pneumatic circuits 30A, 30B to operate the first set of clamping devices for clamping one vehicle type A vehicle.
1A ₅ and cylinders 41B ₁ , 41B ₂ , for operating the second set of clamping devices for clamping the other vehicle type B vehicle
41B ₃ , 41B ₄ , 41B ₅ and 41B ₆ are respectively connected.

In addition, the pneumatic circuit 30C is always connected to the auto joint 2
Valve members which are connected in series between B and 2C and are switched to the non-conducting side in conjunction with the clamp operation of the clamp device, that is, the limit valves 38A ₁ , 38A ₂ , 38A ₃ , 38.
A ₄ , 38A ₅ , and 38B ₁ , 38B ₂ , 38B ₃ ,
38B _{4, 38B} 5, consisted 38B ₆ Prefecture, the Rimitsuto valve _38A 1 _{~38A 5} to a first set of clamping device, respectively to correspond to Rimitsuto valve _38B 1 _{~38B 6} to the second set of clamping devices.

In this way, the limit valves 38A _{1 to} 38A ₅ , 38B ₁
Since ～38B ₆ are connected in series, the even clamping device in any one clamps actuated, this Rimitsuto valve attached to the clamping device is switched in conjunction with the non-conductive side, pneumatic circuit 30C are nonconducting It becomes a state.

FIG. 2 is a plan view showing a clamp device for vehicles A and B arranged on the carriage 4 and a vehicle type detection device for detecting a vehicle type, and FIG. 3 is a side view thereof.

That is, the carriage 4, the clamping device _40A 1 to 4 having five respective cylinders _41A 1 _{~41A 5} for Vehicle A
0A ₅ and six cylinders 41B ₁ for car B
A clamping device _40B 1 _{~40B 6} having 41B _6,
Vehicle type detection devices 50A and 50B having two limit valves 34A and 34B for detecting the vehicle types of the A vehicle and the B vehicle based on the difference in the vehicle body shapes are provided, and the limit valves 34A and 34B are provided.
When the actuator of B is engaged with the vehicle body of vehicle A or vehicle B, respectively, the clamp device of the vehicle type detected is activated.

And the front of the carriage 4, tracks 6 side auto Jiyo Into coupling portion _{2A 1,} 2B 1, 2C bogie side of the auto Jiyo Into coupling portion _2A 2 connected to _1, 2B 2, 2C ₂ a provided air source Air from 11 (see FIG. 1) is supplied to the truck side, and the air supplied to the truck side is communicated with each clamp device.

4, 5 and 6 show the automatic joint connecting portion 2
The details of A, 2B and 2C are shown. The autojoint connecting parts 2A ₁ , 2B ₁ and 2C ₁ on the side of the track 6 are provided in the horizontal direction above the bracket 42 as shown in FIG. Correspondingly, the automatic joint connecting portions 2A ₂ , 2B ₂ and 2C ₂ (see FIGS. 3 and 4) on the trolley 4 side are provided, and the connecting portions on each side have the same structure. Have

FIG. 5 shows, as a representative thereof, the coupling portion 2A ₁ on the side of the track 6.
And the connecting portion 2A ₂ on the dolly 4 side,
On the side of the track 6, the bracket 42, the cylinder 14A,
The valve 13A (see FIG. 1) is fixed, and the cylinder 14A
The connecting portion 2A ₁ is attached to the rod 14A ₁ .

The connecting portion 2A ₁ has an internal structure as shown in FIG.
A chuck 43 having a large diameter portion 43a and a small diameter portion 43b on the inner diameter portion, is fixed to the distal end of the piston rod 14A _1, a slidable through an O-ring 44 to the small diameter portion 43b of the chuck 43, the bias spring The spool 46 is biased to the right in the figure by 45, and the checking head 47 is biased to the left in the figure by the bias spring 45.

In addition, the clamping devices 40A ₁ to 40 for A cars and B cars
As shown in FIG. 2, A ₅ and 40B _{1 to} 40B ₆ are respectively provided on the carriage 4, and their mounting directions are appropriately determined, but their configurations are all the same, so only the clamping device 40B ₁ will be described here. This will be described with reference to FIGS. 7 and 8.

An upper portion of a cylinder 41B ₁ for driving a clamp device is pivotally attached to a shaft 48A of a post 48 vertically provided on the carriage 4, and a shaft 41D at a tip end portion of a piston rod 41C of the cylinder 41B ₁ has a substantially T-shape. One end of the clamp piece 49 is pivotally attached, and the leg portion of the clamp piece 49 is attached to the shaft 48 of the post 48.
As the piston rod 41C expands and contracts by pivotally attaching to B, the cylinder 41B ₁ slightly swings around the shaft 48A in the figure, while the clamp piece 49 moves between the clamp position shown in the figure and the unclamp position shown in FIG. The space between them can rotate about the shaft 48B.

Further, by attaching a Rimitsuto valve 38B ₁ to the cylinder 41B _1, rotatably the actuator 38C to the Rimitsuto valve 38B _1, the Rimitsuto valve 38B ₁ shall apply to the state shown in FIG. 8 by the biasing force of the self always first The conductive position shown in FIG. 1, that is, the conductive state is maintained.

Furthermore, the dog 41E is fixed to the piston rod 41C,
In the rod contracted state shown in FIG. 8, the dog 41E is disengaged from the actuator 38C, and in the rod extended state shown in FIG. 7, the dog 41E turns the actuator 38C rightward against its biasing force, and the limit valve 38B ₁ is turned off. The shape of each part is determined so as to be in a conductive state.

Next, as shown in FIG.
It is provided on the bracket 51 provided at.

The detection rod 52 is vertically slidably mounted on the guide portions 51a and 51b of the bracket 51.
2, the dog 53 is fixedly installed, and the dog 53 and the guide portion 51b
A spring 54 is attached between the detection rod 52 and
Is biased upward.

On the other hand, a limit valve 34A is attached to the bracket 51, and an actuator 34C is rotatably provided on the limit valve 34A. Normally, the limit valve 34A is shown in phantom in FIG. 1 by its own urging force. When the detection rod 52 is pushed by the vehicle body 3A and lowered to the position shown by the solid line in the figure against the spring 54, the dog 53 resists the biasing force of the actuator 34C to the left as shown in FIG. By doing so, the limit valve 34A is brought into a conductive state.

The vehicle type detection device 50B has the same configuration.

Next, the operation of this embodiment configured as described above will be described.

The dolly 4 arrives at a predetermined stage of the truck 6, and the dolly 4
When the vehicle body 3 is placed on the upper side, this is detected by a limit switch or the like to switch the electromagnetic switching valves 13A and 13C from the state shown in FIG. Thereby, the cylinder 14A of the air in the air source 11 is pressure adjusted by the pressure regulator 12 the auto Jiyo Into supplied to the head side of the 14C, piston rod _14A 1, 14C ₁ is extended.

As a result, as shown in FIG. 5, the autojoint coupling portions 2A ₁ and 2C ₁ on the track side are projected and coupled to the coupling portions 2A ₂ and 2C ₂ on the dolly 4, and the piston rods 14A ₁ and 14C ₁ are further extended. Then, the spool 46 (see FIG. 6) fixed to the tip end thereof moves leftward against the bias spring 45, and the piston rods 14A ₁ , 14C are moved.
Air passage 14A ₂ or the like in ₁ is opened, the auto Jiyo Into coupling portion _2A 1 of track 6 side, 2C ₁ is turned on.

On the other hand, since the autojoint coupling portion 2B is not coupled, it is kept in a non-conductive state.

At the same time, when, for example, the vehicle body 3 of the car A is loaded on the carriage 4, the detection rod 52 of the vehicle type detection device 50A shown in FIG. 9 is pushed by the vehicle body 3 and is shown by a virtual line against the spring 54. It descends from the position to the position shown by the solid line.

As the detection rod 52 descends, the dog 53 also descends, causing the actuator 34C to rotate counterclockwise against its urging force, and the limit valve 34A is switched from the state shown in FIG. 1, so that the switching valve 33A is switched to the A vehicle cylinder 41A _1. ~ 41A ₅
Switch to make the side conductive.

On the other hand, the detection rod of the other vehicle type detection device 50B is the vehicle body 3
Since the limit valve 34B is not engaged with the
In the state shown in the figure, the switching valve 33B is kept in a non-conductive state.

When air is supplied to the head side of the cylinder _41A 1 _{~41A 5,} so extending from a position where piston rod 41C is shown in Figure 8 to the position shown in FIG. 7, the clamp piece 49
Becomes the state shown in FIG. 7, and a series of clamp devices 40A
_{1 ~40A 5} is firmly fixed to the vehicle body 3.

At this time, due to the extension of the piston rod 41c, the dog 4
Since 1E rotates actuator 38c in the clockwise direction against the urging force thereof, limit valves 38A _{1 to} 38A ₅
1 is switched from the state shown in FIG. 1 to the non-conductive state, the air from the air source 11 is not supplied to the pneumatic circuit 30c, and the pressure switch 15 is in the inactive state.

On the other hand, when the vehicle body 3 of the B vehicle is loaded on the carriage 4, the vehicle type detection device 50B operates and the limit valve 34B is switched from the state shown in FIG. 1, and the switching valve 33B is switched to the B vehicle cylinder 41B. _{1 to} 41B ₆ is conducted, and a series of clamp devices 40B _{1 to} 40B ₆ are operated to firmly fix the vehicle body 3 on the carriage 4.

Since at this time the detection rod of the other vehicle type detecting device 50A is in a position not engaged with the vehicle body, the switching valve 33A is held in the nonconductive state, the clamping device 40B ₁ ~40B ₆ is inoperative position that is inactive Is in a state.

With the vehicle body 3 fixed on the bogie 4, for example, welding work or the like is performed, and when this is completed, an unclamp command is issued and the electromagnetic switching valves 13A and 13B are switched respectively.
The air from the air source 11 is supplied to the rod side of the cylinder 14A and the head side of the cylinder 14B, respectively.

As a result, the autojoint connecting portion 2A is non-conducting, 2B
Is in a conductive state, the air of the air source 11 is supplied to the rod side of the cylinders 41A _{1 to} 41A ₅ for the A car, the piston rod 41C of the clamp devices 40A _{1 to} 40A ₅ contracts, and the clamp piece 49 rotates rightward. , The restriction of the actuator 38C by the dog 41D is released, and the limits 38A ₁ to 38A ₅ are brought into the conducting state shown in FIG.

At this time, since the clamp devices 40B _{1 to} 40B ₆ for the B vehicle are also in the inoperative state and the limit valves 38B _{1 to} 38B ₆ are also in the conductive state, the pressure switch 15 operates to release the fixing of the vehicle body 3. A confirmation signal is emitted by a sound or light, etc., and the autojoint coupling portions 2A, 2B, 2
The connection of C is released and the process of extracting the vehicle body 3 is started.

Even when the B vehicle is fixed on the carriage 4, the fixing by the B vehicle clamping devices 40B _{1 to} 40B ₆ is released in the same manner, and the unclamping confirmation signal is issued.

However, for example, if _one of the clamping devices 40B _{1 to} 40B ₂ that should be in the inoperative state is not completely returned to the inoperative position or the clamp is activated, The limit valve attached to the clamp device becomes non-conductive.
In this case, the air is not supplied from the air source 11 into the pneumatic circuit 30C, and the pressure switch 15 is in the inactive state. Therefore, the confirmation signal is not issued from the pressure switch 15, and the vehicle body 3 is not carried out. This is because when there is a clamp device that has not completely returned to the inoperative state, when the vehicle body 3 is unloaded from the carriage 4, the carried vehicle body 3 has not returned to the inactive state. This is because an accident such as being caught on the surface and being damaged occurs in the present embodiment. In the present embodiment, such an accident can be prevented in advance.

In addition, when working with the vehicle body 3 fixed on the carriage 4, if the robot runs out of control or the clamp device malfunctions and you want to remove the clamp device immediately, By directly supplying the air from the air source 11 to the inlet 36A, the clamp device is unclamped regardless of the original operation command, and the vehicle body 3 is moved by the trolley 4
Can be extracted from.

Further, when it is desired to bring the clamp device into a clamped state for inspection of the clamp device, air can be directly supplied to the quick joint 36B to operate only the clamp device and observe the operating state.

It should be noted that in the above-described embodiment, the case where the vehicle types of the vehicle body 3 mounted on the carriage 4 are two types of vehicles A and B has been described. However, when the number of vehicle types is three or more, It is only necessary to provide a corresponding number of clamp devices capable of fixing the vehicle body and switching valves for switching the pneumatic circuit on the trolley side to the respective clamp devices of the set and limit valves for detecting the vehicle type of the vehicle body mounted on the trolley. Instead of dedicating all of the clamp devices to each car model, it is also possible to use a part of them for each car model.

〔The invention's effect〕

As described above, according to the present invention, since a plurality of sets of clamp devices that can fix the vehicle bodies of a plurality of vehicle types mounted on the truck by pneumatic pressure are provided, the vehicle bodies of a plurality of vehicle types can be mounted on the same truck. The line configuration in the factory can be greatly simplified.

Further, a plurality of limit valves for detecting the vehicle type of the vehicle body mounted on the trolley and switching the pneumatic circuit on the trolley side to the corresponding clamp device side are provided, and a plurality of sets of clamping devices are provided by the same pneumatic circuit. Since it was made to operate, multiple sets of pneumatic circuits are provided on the track side and the truck side corresponding to each clamp device, and compared to the case where the pneumatic circuits on both sides are connected by the autojoint respectively. The number of autojoints with a complicated structure is halved, the facility cost is reduced, and the risk of malfunctions is reduced.

Further, since the process of detecting the vehicle type on the truck and switching the pneumatic circuit to the corresponding clamping device side is performed only by pneumatic control, the vehicle type of the vehicle body is electrically detected and the pneumatic circuit is switched. The structure does not become complicated and the maintainability does not deteriorate like normal electric control, and work can be performed without any trouble even when electrical equipment such as current collectors cannot be used due to explosion proof such as in a paint factory. it can.

In addition, since the valve member attached to each of the clamp devices is provided in series between the pneumatic circuit on the dolly side and the pressure detecting means for detecting the pressure in the pneumatic circuit on the dolly side, it is possible to correspond. If the clamp device does not completely return to the inoperative position, the valve member will not enter the inactive state and air from the air pressure source will not be supplied to the pressure detecting means, so the vehicle body will be taken out of the bogie. Therefore, it is possible to prevent an accident in which the vehicle body is caught by a clamp device that has not returned to the inoperative position when being carried out and is damaged.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an example of a pneumatic circuit of a vehicle type switching device for bogies according to the present invention, FIG. 2 is a plan view showing an arrangement example of each device on the bogie, and FIG. 3 is a main part thereof. FIG. 4 is a side view, FIG. 4 is an enlarged front view showing the automatic joint connecting portion on the track side, FIG. 5 is a side view showing the automatic joint connecting state on the track side and the truck side, and FIG. 6 is the same. FIG. 7 is an enlarged cross-sectional view showing the internal structure of the auto-joint coupling portion on the track side, FIG. 7 is a side view showing the clamped state of the clamp device, FIG. 8 is a side view showing the unclamped state, and FIG. FIG. 10 is a side view showing the vehicle type detecting device, FIG. 10 is an explanatory view showing an example of a line configuration of a truck to which the present invention is applied, and FIG. 11 is a side view showing a conventional vehicle body fixing device on a bogie. 12th Are likewise circuit diagram showing an example of the pneumatic circuit. 2 ... Autojoint, 3 ... Body 4 ... Truck, 6 ... Truck 10 ... Pneumatic circuit (track side), 11 ... Air source 30 ... Pneumatic circuit (truck side) 33A, 33B ... ... switching valve _{34A, 34B, 38A 1 ~38A 5} , 38B 1 ~38
B (for B vehicles) ₆ ...... Rimitsuto valve 40A ₁ ~40A ₅ ...... clamping device (for Vehicle A) _40B 1 ~40B ₆ ...... clamping device 50A, 50B ...... vehicle type detecting device

Claims (1)

[Claims] 1. An operating position for pneumatically fixing a vehicle body of any one of a plurality of vehicle bodies mounted on a truck moving on a truck, and an inoperative position for releasing the vehicle body from the fixed state. A plurality of sets of clamp devices that operate in the above manner, and a truck-mounted vehicle type switching device having pneumatic circuits on a truck side and a truck side that supply air to the clamp devices via an auto joint coupling part, and are mounted on the truck. A plurality of limit valves that detect the vehicle type of the vehicle body and switch the pneumatic circuit on the trolley side to the corresponding clamp device side are provided on the trolley, and are attached to each of the plurality of clamp devices.
When a corresponding clamp device is operated to an inoperative position, a valve member that is operated to a conduction position that allows air to flow is detected by the pneumatic circuit on the dolly side and the pressure detection means for detecting the pressure in the pneumatic circuit on the dolly side. A vehicle upper vehicle type switching device, which is provided in series between the vehicle and the vehicle.