JP2012246127A - Carrying facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carrying facility having a motor-driven carrying object support table for liftably supporting a vehicle body, and utilizable as a vehicle body carrying means in an automobile assembling line.SOLUTION: This carrying facility is constituted so as to operate a lifting driving means 9 when passing through a set point in a traveling passage, by mounting the carrying object support table 2 and the motor-driven lifting driving means 9 on a carrying carriage 1 for traveling on the traveling passage, and is constituted so that a control means 16 for controlling a driving motor 12 of the lifting driving means 9 based on a detecting signal from a pulse encoder for interlocking with the motor 12, is arranged not on the carrying carriage 1 but on the traveling passage side, and an electric power and signal transmitting means 18 is arranged in the set point for supplying electric power to the driving motor 12 from the control means 16 and transmitting the detecting signal to the control means 16 from the pulse encoder, in a traveling state of the carrying carriage 1.

Description

  The present invention relates to a transport facility in which a motor-driven controlled device is mounted on a transport traveling body that travels on a travel route, and the controlled device is operated when passing through a set point in the travel route. It is.

  This type of transport facility is used as a transport means for transporting a vehicle body in an automobile assembly line, for example. That is, on a transport carriage that travels on a travel path constituted by guide rails laid on the floor surface, as a controlled device, a transportable object support base that can move up and down to support the vehicle body and the transported object support base. In order to change the height of the transported object support base in accordance with the assigned work for each section in the travel route, the lift driving means is operated at the entrance of each section. There is known a transport facility that is configured so as to be made. Thus, as the raising / lowering driving means of the transported object support base, a motor-driven one is known as described in Patent Document 1, but the driving motor of the lifting / lowering driving means is driven up and down. Therefore, speed control and stop control are required based on the current height information of the transported object support table, and a control means for performing this control is mounted on the transport carriage.

JP-A-4-306162

  That is, electric power is supplied to a driving motor of a motor-driven controlled device (a transported object support base and an elevating drive means for driving the lift up and down in Patent Document 1) mounted on a transport traveling body (a transport carriage in Patent Document 1). Is generally known to be performed from the ground side via a feeder line installed along the travel route and a current collector on the transport traveling body side. Control means (motor controller and control device for sending a speed control signal and stop signal to the motor controller) necessary for control based on the distance, angle, time, etc. moved by driving) Since it is installed, the control means is required only for the number of transporting traveling bodies, and in an automobile assembly line in which a large number of transporting traveling bodies are used, the equipment cost and the electrical system are maintained. So that the inspection cost is very expensive.

  The present invention proposes a transport facility capable of solving the above-described conventional problems, and the transport facility according to the present invention described in claim 1 has a relationship with an embodiment described later. For the sake of easy understanding, the reference numerals used in the description of the embodiment are shown in parentheses and are controlled by a motor driven controlled body (conveying carriage (1)) traveling on the traveling route. A device (conveyed object support base (2) and its lifting drive means (9)) is mounted, and this controlled device is set at a set point in the travel route (set point (B) on the entrance side of the work area (A) and In the transport facility configured to operate when passing through the outlet side set point (C)), the driving motor (12) of the controlled device is provided with an operation amount detecting means (pulse encoder (20 )) Control means (16) for controlling based on the detection signal Provided not on the traveling body (conveying carriage (1)) but on the traveling route side, the power supply from the control means (16) to the driving motor (12) and the operation amount detection are provided at the set point. Power and signal transmission means (18) for transmitting detection signals from the means to the control means (16) in the traveling state of the transport traveling body is provided.

  When carrying out the present invention, specifically, as described in claim 2, the power and signal transmission means (18) are connected to the set points (the set points (B) on the entrance side of the work area (A) and A synchronous carriage (14) that travels in synchronization with the forward travel of the transport traveling body (conveyance carriage (1)) passing through the exit side set point (C)), and the synchronous carriage (14) and the transport carriage A power and signal transmission connector (17) provided between the traveling body and a connector unit (22a to 23b) that is detachable from each other and that constitutes the connector (17), Connector unit (38) for connecting / disconnecting the connector unit (22b, 23b) on the synchronous carriage (14) side to the connector unit (22a, 23a) on the transport traveling body side is provided on the synchronization carriage (14). I can do it. In this case, as described in claim 3, the synchronous carriage (14) is reciprocally supported on a synchronous carriage travel path parallel to a travel path of the transport traveling body, and is also supported on the transport traveling body. A connecting means (15), a connecting / disconnecting operating means (31) of the connecting means (15), and a reverse traveling drive means (26a-28) for returning from the end of the synchronous cart traveling path to the starting position. It can be configured.

  According to a fourth aspect of the present invention, the transport traveling body is a carriage (1) that travels on a guide rail (3a, 3b) laid on a floor surface, and the motor-driven controlled device is The lifting / lowering drive means (9) of the object support base (2) supported so as to be movable up and down on the traveling body for conveyance, and the transmission system of the drive motor (12) of the lifting / lowering driving means (9) In addition, a speed reducer having a self-locking function that prevents the transported object support base (2) from descending due to gravity is interposed, and as the set point, the transported object support base (2) is moved up and down to a predetermined height. It is possible to set the points to be set (the entry side set point (B) and the exit side set point (C) of the work area (A)).

  Further, as described in claim 5, the operation amount detecting means is a pulse encoder (20) interlocking with the drive motor (12), and the drive motor (12) is an AC motor capable of speed control by frequency. The control means (16) includes an inverter that controls the speed of the drive motor (12), and sets the count value of the transmitted pulse of the pulse encoder (20) after the drive motor (12) is started. Based on this, the inverter can be controlled to control and stop the speed of the drive motor (12).

  According to the configuration of the present invention as set forth in claim 1, when the transporting traveling body passes through the set point for operating the controlled device, the driving motor of the controlled device mounted on the transporting traveling body. The operation is performed with electric power from the travel route side (the ground side) of the transport traveling body. Information for controlling the controlled device required at this time, that is, the controlled object obtained by the operation amount detecting means. The amount of operation of the device (distance, angle, time, etc., moved by driving) is transmitted from the transport traveling body side to the control means provided on the traveling route side (ground side), and based on the operation amount of the controlled device Since the power supply to the drive motor is controlled to perform the necessary speed control and stop control, compared to the conventional configuration in which the control means is mounted on the transport travel body side, Control of controlled devices is the same as before Yet those performed, the control means requires only the number of setpoint operating the controlled device, can significantly reduce the maintenance costs of the equipment cost and the electrical system.

  In the present invention, power is supplied to the controlled device drive motor on the transport traveling body side via the control means provided at each set point on the travel path side for operating the controlled device. Although it is possible to carry out via the erected power supply line and the current collector provided on the transport traveling body side, according to the configuration of claim 2, the operating amount of the controlled device on the transport traveling body side in particular. Even when the amount of information transmitted from the detection means to the control means on the travel route side is large, it can be implemented easily and inexpensively using a connector having a large number of contacts. In this case, according to the configuration of the third aspect, since the synchronous cart disposed at each set point on the travel route side can be mechanically coupled to the transport traveling body to perform synchronous travel, Transmission of power and signals between the transport traveling body and the synchronous carriage can be reliably performed without applying an excessive external force to the connector.

  In addition, the traveling body for conveyance in the present invention may be an overhead traveling type transportation traveling body (such as a self-propelled train type, a driven type driven by a conveyor chain or friction drive means), The controlled device provided in the transporting traveling body is composed of a transported object supporting hanger suspended from the transporting traveling body and its lifting and lowering driving means, and is tiltably provided on the floor carriage. Anything may be used, such as a carrier support base and a tilting means thereof. Furthermore, the driving motor (electric motor) provided in the controlled device is not limited to the motor itself directly driving the driven portion of the controlled device, but a fluid pressure cylinder that drives the driven portion of the controlled device. An electric motor that drives a pressure source that supplies fluid pressure to the unit or fluid pressure motor may be used.

  However, in particular, according to the configurations of the fourth and fifth aspects, a transport facility suitable for a floor cart type transport facility that supports and transports the vehicle body in the automobile assembly line can be obtained.

FIG. 1 is a schematic plan view showing a part of a conveyance path in a conveyance facility of the present invention employed in an automobile assembly line. FIG. 2 is a side view of the transport carriage shown in FIG. FIG. 3 is a plan view showing the transport carriage and the synchronous carriage. FIG. 4 is a block diagram for explaining the power and signal transmission system of the transport carriage and the synchronous carriage. FIG. 5 is a plan view showing details of the synchronous carriage. FIG. 6 is a side view of the same synchronous cart. FIG. 7 is a longitudinal sectional front view showing the connector operating means of the synchronous cart. FIG. 8 is a longitudinal rear view showing the connecting means of the synchronous cart. FIG. 9 is a plan view of the main part in a state where power and signals are transmitted between the synchronous carriage and the transport carriage. FIG. 10 is a front view of a single connector on the side of the synchronous carriage operated by the connector operating means, and a front view showing the single connector of the position fixed on the side of the transport carriage.

  In FIG. 1, reference numeral 1 denotes a transport carriage, which travels in a continuous state against each other on a constant travel route forming an automobile assembly line. Each transport carriage 1 is provided with a transportable object support base 2 that can be moved up and down, and a vehicle body W of an automobile to be assembled is loaded on the transportable object support base 2. Thus, a plurality of work areas are set in the fixed travel route, and each work area has a height suitable for work in each work area as the height of the vehicle body W supported and conveyed. Is set. That is, when each transport carriage 1 passes through the entrance side set point B of the work area A shown in FIG. 1, the transport object support base 2 on each transport carriage 1 is raised and lowered to the height set in the work area A. Thus, when each transport carriage 1 passes through the exit side set point C of the work area A, the object support base 2 on each transport carriage 1 is raised and lowered to the height set in the next work area.

  As shown in FIGS. 2 and 3, each transport cart 1 includes a pair of left and right front and rear wheel units 5 a each having a wheel 4 that rolls on a pair of left and right guide rails 3 a and 3 b laid on the floor surface. And a pair of wheel units 5a, 5c on one side are provided with positioning vertical axis rollers 6 that sandwich the guide rail 3a from both the left and right sides. And the to-be-conveyed object support stand 2 provided on this conveyance cart 1 is a pair of left and right support bases supported by a pair of left and right pantograph link mechanisms 7a and 7b so as to be movable up and down in parallel as shown in FIGS. The support bases 8a and 8b are driven up and down by the up-and-down driving means 9 while maintaining the same level. The illustrated lift driving means 9 includes a pair of left and right push-up and pull-down chains 10a and 10b that individually support the support bases 8a and 8b, and a left and right side that pushes and pulls down each of the chains 10a and 10b. It is composed of a pair of chain drive means 11a, 11b and one motor 12 with a speed reducer that drives both chain drive means 11a, 11b. The chains 10a and 10b are well known in the art, and are composed of a pair of chain units 13a and 13b that form a rod-shaped body that cannot be bent when they are in a vertical standing posture. The motor 12 with a speed reducer is an AC motor whose speed is controlled by frequency conversion, and the speed reducer provided in the motor 12 with the speed reducer is a carrier support base when the motor 12 is not energized. It has a self-locking function that can prevent 2 from descending due to gravity.

  Synchronous carts 14 are arranged in parallel at the entrance side set point B and the exit side set point C of each work area A set in the travel route of the transport cart 1 having the above configuration. As shown in FIGS. 3 and 4, the synchronous carriage 14 includes a connecting means 15 for traveling synchronously with the transport carriages 1 passing through the setting points B and C, and an ascending / descending movement on the connected transport carriage 1. The drive means 9 includes a control means 16 for feeding and controlling the motor 12 with a speed reducer, and is transported together with a connectable / detachable connector 17 for transmitting power and signals to and from the connected transport carriage 1. The power and signal transmission means 18 between the carts 1 are configured. The control means 16 compares the count value and set value of the transmitted pulse of the motor controller 19 having an inverter for controlling the speed of the motor 12 with a speed reducer and the pulse encoder 20 linked to the motor 12 with the speed reducer. The control unit 21 is configured to control the speed of the motor 12 with a speed reducer and stop the motor controller 19 based on the inverter. The connector 17 includes a power connector unit 22a and a signal connector unit 23a fixed to the transport carriage 1, and a power connector provided on the synchronous carriage 14 so as to be detachable from the connector units 22a and 23a. It consists of a single unit 22b and a signal connector unit 23b.

  Hereinafter, the detailed structure of the synchronous carriage 14 will be described with reference to FIGS. 5 to 10. The synchronous carriage 14 has a pair of left and right guide rails 24 a and 24 b laid on the floor surface, and two pairs of left and right front and rear sets. The wheels 25a to 26b are supported so as to be reciprocally movable in parallel with the travel path of the transport carriage 1. The pair of left and right wheels 26a and 26b with respect to the forward direction of the transport carriage 1 are driven by a motor 27 with a speed reducer. It is attached to both ends of one rotating shaft 28 that is rotationally driven. The speed reducer of the motor 27 with a speed reducer does not have a self-locking function, and the synchronous carriage 14 can freely move back and forth when the motor 27 with speed reducer is not energized.

  The connecting means 15 for causing the synchronous cart 14 to travel synchronously with the transport cart 1 is constituted by a shaft projecting vertically downward from the lower side of the side of the transport cart 1 adjacent to the travel path of the synchronous cart 14. Openable and closable holding tools 30a and 30b for holding the clamped portion 29 from both the front and rear sides in the cart traveling direction, and the clamp tools 30a and 30b provided on the synchronous cart 14 on the outside of the movement path of the clamped portion 29 The connection / disengagement operation means 31 switches between a retracted retracted state and a sandwiched state in which the sandwiched portion 29 is sandwiched. Of the holding tools 30a and 30b, the holding tool 30a on the side receiving the clamped portion 29 on the transport carriage 1 side is supported by a slide guide 32 fixed on the synchronous carriage 14 so as to be movable in and out. It consists of a strip. Thus, the clamping tool 30a has a moving direction (the length direction of the clamping tool 30a) that is not perpendicular to the traveling path of the transport carriage 1, and the leading end of the sandwiching tool 30a is the transport carriage 1. It is inclined so as to retreat in the direction opposite to the forward direction of the carriage, and is fixed to the holding tool 30a on both sides of the right and left near the tip of the holding tool 30a on the side opposite to the forward side of the transport carriage 1. A movable plate 35 rotatably supported by a vertical support shaft 34 is provided on the bearing plate 33, and the other holding tool 30 b is fixed to the movable plate 35.

  The connection / disengagement operation means 31 is a cylinder unit 36 that drives the holding tool 30a to move in and out, and a cylinder that is interposed between the movable plate 35 and the holding tool 30a and drives the movable plate 35 (the holding tool 30b) to open and close. The unit 37 is configured. Therefore, in the synchronous carriage 14 waiting at the setting points B and C at the entrance / exit of the work area A, as shown by a solid line in FIG. 5, the holding tool 30b is opened with respect to the holding tool 30a. When 30a is advanced to the advance limit position by the cylinder unit 36, the clamped portion 29 of the transport carriage 1 traveling forward at a constant speed passes through the front of the open clamp 30b and then the clamp 30a is moved. Abuts on the tip. As a result, the synchronous carriage 14 that is not locked with respect to traveling receives thrust on the transport carriage 1 side via the sandwiched portion 29 and the sandwiching tool 30a, and starts traveling forward in the same direction as the transport carriage 1. Immediately after this, the clamping unit 30b is closed around the vertical support shaft 34 by the cylinder unit 37 via the movable plate 35, and the clamping unit 30a, 30b is sandwiched between the clamping units 30a and 30b as shown in FIG. The part 29 can be clamped. As a result, the synchronous cart 14 is connected to the transport cart 1 and travels forward integrally with the transport cart 1 under the thrust of the transport cart 1.

  When canceling the synchronous traveling of the synchronous carriage 14 with respect to the transport carriage 1, the clamping unit 30 b is opened around the vertical support shaft 34 via the movable plate 35 by the cylinder unit 37, and the sandwiched portion 29 on the transport carriage 1 side is moved. 5 is released, the holding tool 30a at the advanced limit position is retracted to the retracted limit position by the cylinder unit 36, and the holding tools 30a and 30b are held by the holding unit 29 on the transport carriage 1 side as shown in FIG. It suffices to retreat outward from the movement path. In this state, the wheel 26a, 26b with a hook is forcibly driven by the motor 27 with a reduction gear, and the synchronous carriage 14 can be returned to the original standby position.

  On the other hand, the power connector single unit 22b and the signal connector single unit 23b on the side of the synchronous cart 14 constituting the connector 17 are transported when the synchronous cart 14 and the transport cart 1 are connected and integrated by the connecting means 15 as described above. The power connector unit 22a and the signal connector unit 23a on the first side are configured to concentrically face each other, but the power connector unit 22b and the signal connector unit 23b on the side of the synchronous carriage 14 are connected to the transport carriage 1. The synchronous carriage 14 is provided with connector operating means 38 for connecting / disconnecting the power connector single unit 22a and the signal connector single unit 23a. The power connector single unit 22a and the signal connector single unit 23a on the transport carriage 1 side are parallel to the travel direction of the transport cart 1 on a support plate 39 provided parallel to and perpendicular to the cart travel direction provided on the lower side of the transport cart 1. It is attached to do.

  That is, the connector operating means 38 includes a movable body 40 provided on the synchronous carriage 14, a cylinder unit 41 for reciprocating the movable body 40, and a connector positioning means 42. That is, a support frame 43 is provided on the synchronous carriage 14, and the upper and lower slide guides 44a and 44b attached to the support frame 43 are perpendicular to the traveling direction of the transport carriage 1 (synchronous carriage 14). The upper and lower two-stage slide rods 45a and 45b are supported so as to be reciprocally movable in the left and right horizontal directions, and the movable body 40 is attached to the tips of both slide rods 45a and 45b. The cylinder unit 41 is attached to the support frame 43 in parallel with the slide guides 44a and 44b at an intermediate position between the upper and lower two-stage slide guides 44a and 44b, and the tip of the piston rod 41a is connected to the movable body 40. ing. The power connector unit 22b and the signal connector unit 23b are attached to the movable body 40 on the front side facing the travel path side of the transport cart 1 so as to be parallel to the travel direction of the transport cart 1 (synchronous cart 14). The support plate 46 is attached via an intermediate connecting member 46a, a mounting substrate 46b, and the like.

  The connector positioning means 41 includes positioning holes 47a and 47b, which are respectively attached to the diagonal corners of the support plate 39 to which the power connector unit 22a and the signal connector unit 23a on the transport carriage 1 side are attached. Two positioning members 48a and 48b, and two positioning pins attached to opposite corners of the support plate 46 to which the power connector unit 22b and the signal connector unit 23b on the synchronous carriage 14 side are attached. 49a, 49b. The positioning holes 47a and 47b of the positioning members 48a and 48b are countersunk at the entrance side, and the positioning pins 49a and 49b are formed with conical tips at the tips thereof, so that the positioning pins 49a and 49b are reliably positioned. It is configured to be introduced into the holes 47a and 47b.

  Thus, when the synchronization carriage 14 and the transport carriage 1 are connected and integrated by the connecting means 15 as described above, the power connector unit 22a on the transport carriage 1 side and the signal connector unit 23a and the synchronization carriage 14 side are integrated. The power connector single unit 22b and the signal connector single unit 23b face each other substantially concentrically, but at the same time, the positioning pins on the synchronous carriage 14 side with respect to the positioning holes 47a and 47b of the positioning members 48a and 48b on the transport carriage 1 side. 49a and 49b are configured to concentrically face each other. In this state, when the cylinder unit 41 of the connector operating means 38 on the side of the synchronous carriage 14 is operated to move the movable body 40 to the transport carriage 1 side, the movable body 40 is attached to the support plate 46 that moves forward. Before the power connector unit 22b and the signal connector unit 23b are fitted and connected to the power connector unit 22a and the signal connector unit 23a attached to the support plate 39 on the transport carriage 1 side, the support plate The tip of the positioning pins 49a, 49b attached to 46 is configured to begin to fit into the positioning holes 47a, 47b of the positioning members 48a, 48b attached to the support plate 39 on the transport carriage 1 side. Then, the positioning pins 49a and 49b are fitted into the positioning holes 47a and 47b, and the support plate 39 on the transport cart 1 side and the support plate 46 on the sync cart 14 side are aligned, and the transport cart 1 (the sync cart 14). ) With respect to the power connector single unit 22a and the signal connector single unit 23a on the transport carriage 1 side by the further movement of the support plate 46 after the relative movement on the two-dimensional vertical plane parallel to the traveling direction is blocked. The power connector unit 22b and the signal connector unit 23b on the side of the synchronous carriage 14 are configured to be fitted and connected.

  Therefore, the support plate 46 to which the power connector unit 22a and the signal connector unit 23a are attached to the movable body 40 that moves forward by the connector operating means 38 is parallel to the traveling direction of the transport carriage 1 (synchronous carriage 14). It is desirable to connect so that the relative movement on the two-dimensional vertical plane is possible within a certain range (within the range where the tips of the positioning pins 49a, 49b can enter the positioning holes 47a, 47b).

  In the transport equipment configured as described above, each synchronous carriage 14 arranged at the entrance side set point B and the exit side set point C of the work area A shown in FIG. 1 has its travel route (guide rails 24a and 24b). At the start end standby position, that is, at the standby position at the end opposite to the forward direction side of the transport carriage 1. Then, as shown by the phantom line in FIG. 5, the connecting means 15 of the synchronous carriage 14 waiting at this standby position is sent to the advance limit position by the cylinder unit 36, and the conveying carriage 1 The holding tool 30 a on the side of receiving the to-be-clamped part 29 enters the movement path of the to-be-clamped part 29, but the other holding tool 30 b is located outside the movement path of the to-be-clamped part 29. In this situation, when the transport carriage 1 passes through the entry side set point B of the work area A shown in FIG. 1, the sandwiched portion 29 of the transport carriage 1 comes into contact with the sandwiching tool 30a on the synchronous carriage 14 side and transports. The carriage 1 pushes and moves the synchronous carriage 14 in the same direction via the sandwiched portion 29 and the sandwiching tool 30a. When the synchronous carriage 14 is pushed by the conveyance carriage 1 and starts moving forward, the clamping tool 30b of the connecting means 15 is closed around the vertical support shaft 34 by the cylinder unit 37, and the conveyance carriage 1 side is clamped. By holding the portion 29 between the pair of holding tools 30 a and 30 b on the side of the synchronous carriage 14, the synchronous carriage 14 is integrally connected to the conveyance carriage 1 and is allowed to run synchronously with the conveyance carriage 1.

  When the synchronous cart 14 is connected to the transport cart 1 and starts synchronous travel as described above, the connector positioning means 42 provided on the connector 17 between the transport cart 1 and the synchronous cart 14 is on the side of the synchronous cart 14. Since the positioning pins 49a and 49b are opposed substantially concentrically to the positioning holes 47a and 47b of the positioning members 48a and 48b on the transport carriage 1 side, the cylinder unit 41 of the connector operating means 38 is operated to When the support plate 46 provided with positioning pins 49a and 49b is moved forward to the transport carriage 1 side, the positioning pins 49a and 49b are inserted into the positioning holes 47a and 47b of the positioning members 48a and 48b on the transport carriage 1 side, The power connector unit 22b and the signal connector unit 23b on the side of the synchronous carriage 14 attached to the support plate 46 are transported. It is aligned concentrically with respect to the power connector alone 22a and signal connector itself 23a of the carriage 1 side. In this state, when the support plate 46 further moves to the advance limit position by the cylinder unit 41, as shown in FIG. 9, the power connector unit 22b and the signal connector unit 23b on the synchronous carriage 14 side are moved to the transport carriage 1 side. The power connector unit 22a and the signal connector unit 23a are fitted to each other to switch to the connected state.

  As described above, if the connector 17 between the transport carriage 1 and the synchronization carriage 14 is switched to the connected state in a state where the synchronization carriage 14 is caused to travel in synchronization with the conveyance carriage 1, the control of the control means 16 on the synchronization carriage 14 is controlled. In accordance with the control procedure set in the apparatus 21, the motor controller 19 starts the motor 12 with a speed reducer of the lifting drive means 9 on the transport carriage 1 side via the power connectors 22a and 22b, and the chain drive means 11a, 11b is operated and the chains 10a and 10b are pushed up or pulled down to drive the object support table 2 to the height set in the work area A, that is, the lowest level indicated by a virtual line in FIG. Are raised and lowered to a height set in the work area A within a range between the maximum level indicated by a solid line in FIG. At this time, the transmission pulse from the pulse encoder 20 on the conveyance carriage 1 side that operates in conjunction with the motor 12 with a speed reducer can be taken into the control device 21 on the synchronization carriage 14 side via the signal connector units 23a and 23b. Since it is possible, the control device 21 counts the transmission pulse from the pulse encoder 20 from the start of the lifting / lowering drive of the transported object support base 2 (the current height value of the transported object support base 2), and the control Based on the comparison with the set value on the speed control program set in the device 21 (the target height value of the object support base 2), the speed control of the acceleration, deceleration and stop of the motor 12 with speed reducer is automatically performed. Therefore, it is possible to raise and lower the transported object support table 2 to the height set in the work area A safely (smoothly) and efficiently.

  As described above, the object support base 2 of the transport carriage 1 passing through the entrance side set point B of the work area A is raised and lowered to the height set in the work area A, and passes through the exit side set point C. The transport object support table 2 of the transport cart 1 is moved up and down to the height set in the work area on the lower side of the work area A. If the height switching of the transport object support table 2 is completed, The support plate 46 is moved back to the original retreat limit position by the cylinder unit 41 of the connector operating means 38, and the power connector unit 22b and the signal connector unit 23b on the synchronous carriage 14 side of the connector 17 are used for power on the transport carriage 1 side. The connector single unit 22a and the signal connector single unit 23a are separated from each other, and the positioning pins 49a and 49b on the synchronous carriage 14 side of the connector positioning means 42 are arranged on the conveying carriage 1 side. The positioning members 48a and 48b are separated from the positioning holes 47a and 47b, and thereafter, the clamping unit 30b is opened relative to the clamping unit 30a by the cylinder units 36 and 37 of the connecting means 15, and the both clamping units 30a and 30b are moved. Retract to the original retreat limit position. As a result, since the synchronous carriage 14 is completely disconnected from the transport carriage 1, the motor 27 with a speed reducer of the synchronous carriage 14 is operated, and the hooked wheels 26a and 26b are rotated in the reverse direction. Thus, the synchronous carriage 14 can be moved backward to the original standby position, that is, the standby positions for the entrance side set point B and the exit side set point C of the work area A, and the next transport cart 1 can be made to wait at the standby position. .

  Since the transport carriage 1 on the automobile assembly line continuously travels at an extremely low speed, after the synchronous carriage 14 is connected to the transport carriage 1 and the synchronous running is started, the object support base 2 is set to a predetermined level. The traveling distance of the synchronous cart 14 required to complete the raising / lowering is sufficiently shorter than the total length of one transport cart 1. Therefore, even if the lifting / lowering height when the lifting / lowering driving means 9 is operated by the electric power supplied from the synchronous carriage 14 to drive the lifting / lowering support 2 is maximum, the next transporting carriage 1 is operated. Before passing through the entrance side set point B and the exit side set point C of the area A, the synchronous carriage 14 in which the raising / lowering drive with respect to the transported object support base 2 is completed is changed to the entrance side set point B and the exit of the work area A. It is possible to return to the standby position for the side setting point C.

  Further, as described above, since the synchronous travel distance from the standby position of the synchronous carriage 14 to the completion of the lift drive with respect to the conveyed product support base 2 is short, power is supplied to the synchronous carriage 14 between the synchronous carriage 14 and the ground side. This can be easily performed by a power supply line supported by a cable support means interposed therebetween, but of course, it may be performed by a power supply rail and current collector.

  The transfer equipment of the present invention can be used as a vehicle transfer means in an automobile assembly line provided with a motor-driven transfer object support base that supports the vehicle body to be movable up and down.

DESCRIPTION OF SYMBOLS 1 Conveyance cart 2 Conveyed object support stand 7a, 7b Pantograph link mechanism 9 Lift drive means 10a, 10b Push-up and pull-down chain 11a, 11b Chain drive means 12 Motor with reduction gear 14 Synchronous carriage 15 Connection means 16 Control means 17 Connector DESCRIPTION OF SYMBOLS 18 Electric power and signal transmission means 19 Motor controller 20 Pulse encoder 21 Control device 22a, 22b Electric power connector unit 23a, 23b Single signal connector 24a, 24b Guide rail 25a-26d Wheel with rod 27 Motor with speed reducer 28 Rotating shaft 29 Covered Clamping parts 30a, 30b Clamping tool 31 Connection / disengagement operation means 32, 44a, 44b Slide guide 34 Vertical support shaft 35 Movable plate 36, 37, 41 Cylinder unit 38 Connector operation means 39, 46 Support plate 40 Movable body 42 Connector positioning means 45a, 45b Slide rod 47a, 47b Positioning hole 48a, 48b Positioning member 49a, 49b Positioning pin

Claims (5)

  In a transport facility in which a motor-driven controlled device is mounted on a transport traveling body that travels on a travel route, and the controlled device is operated when passing through a set point in the travel route, the controlled device Control means for controlling the drive motor based on the detection signal from the operation amount detection means provided in the controlled device is provided not on the transport traveling body but on the travel route side, and at the set point. Is provided with power and signal transmission means for supplying power from the control means to the drive motor and transmitting detection signals from the operation amount detection means to the control means in the travel state of the transport traveling body. Transport equipment.   The power and signal transmission means are provided between a synchronous cart that travels forward in synchronization with a forward travel of the transport traveling body that passes through the set point, and between the synchronous cart and the transport traveling body. A connector for connecting and disconnecting the single connector on the side of the synchronous carriage to the single connector on the side of the transport traveling body among the single connectors that can be connected to and separated from each other. The transfer facility according to claim 1, wherein operating means is provided in the synchronous carriage.   The synchronous carriage is reciprocally supported on a synchronous carriage traveling path parallel to the traveling path of the transport traveling body, and is connected to the transport traveling body, and a connecting / disconnecting operating means of the connecting means, The transporting facility according to claim 2, further comprising reverse drive means for returning from the end of the synchronous cart travel path to the start position.   The transport traveling body includes a carriage that travels on a guide rail laid on a floor surface, and the motor-driven controlled device supports a transported object supported to be movable up and down on the transport traveling body. A table and its elevation drive means, and in the transmission system of the drive motor of this elevation drive means, a speed reducer having a self-locking function for preventing the transported object support table from descending due to gravity is interposed, The transfer facility according to any one of claims 1 to 3, wherein a point for raising and lowering the object support base to a predetermined height is set as the set point.   The operation amount detection means is a pulse encoder that is linked to the drive motor, the drive motor is an AC motor that can be speed-controlled by frequency, and the control means includes an inverter that controls the speed of the drive motor. The speed control and stop of the driving motor are performed via the inverter based on the count value of the pulse transmitted from the pulse encoder after the driving motor is started. The described transport equipment.

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