JP4909029B2 - Control device for load lifting and lowering transfer device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an electric (electric) trolley and a control device for a load lifting / lowering transfer device that is equipped with an electric (electric) load elevator (such as an electric chain block and an electric hoist) mounted on the electric trolley, and that moves and lifts the load It is.

  2. Description of the Related Art Conventionally, there is a load lifting / lowering transfer device that includes an electric trolley that traverses and an electric load lifting / lowering device such as an electric chain block mounted on the electric trolley, and that traverses and lifts the load. FIG. 1 is a diagram showing a configuration example of this type of load lifting / lowering transfer apparatus, in which FIG. 1 (a) is a front view and FIG. 1 (b) is a side view. The load lifting / lowering transfer apparatus 100 includes an electric (electric) trolley 101 and an electric chain block 102 as an electric (electric) load lifting machine. The electric trolley 101 includes a traversing motor 37 and a control box 104, and drives the wheels 105 by forward and reverse rotation of the traversing motor 37 so as to traverse in the left-right direction along the traversing rail 106.

  The electric chain block 102 includes a lifting / lowering motor 40 and a control box 107. The hook 109 connected to the lower end of the load chain 108 is raised and lowered by forward / reverse rotation of the lifting motor 40, and a load (not shown) suspended from the hook 109 is raised and lowered. The electric trolley 101 is traversed in the left-right direction and the hook 109 of the electric chain block 102 is raised and lowered by operating each operation switch (push button switch) of the operation switch box 110. Reference numeral 111 denotes a chain bucket that accommodates the wound load chain 108.

  FIG. 2 is a diagram illustrating a circuit configuration example of the control device of the load lifting / lowering transfer apparatus 100. As shown in FIG. 2, the present control device includes an operation box circuit unit 1 housed in an operation switch box 110, a trolley circuit unit 2 housed in a control box 104 of an electric trolley 101, and a traverse motor 37. The trolley motor circuit unit 3 and the electric chain block circuit unit 4 housed in the control box 107 of the electric chain block 102 are provided. The operation box circuit unit 1 includes an emergency stop operation switch (normally closed pushbutton switch) 10, a right lateral operation switch (normally open pushbutton switch) 11, and a left lateral operation switch (normally open pushbutton switch). 12, a descent operation switch (normally open pushbutton switch) 13 and a descent operation switch (normally open pushbutton switch) 14 are provided. A multi-core (here, 7-core) cable 29 connected to the operation box circuit unit 1 is connected to the trolley circuit unit 2 via a plug socket 30.

  The trolley circuit unit 2 includes a trolley power supply circuit 21 for supplying power to the traversing motor 37 of the trolley motor circuit unit 3, and the trolley power supply circuit 21 has three-phase (R phase, S phase, T phase) wiring. 22 is provided. The R-phase, S-phase, and T-phase of the three-phase cable 15 are connected to the R-phase, S-phase, and T-phase of the three-phase wiring 22, respectively, so that three-phase power is supplied from a three-phase power source (not shown). It has become. The three-phase power of the three-phase wiring 22 is supplied to the transverse motor 37 of the trolley motor circuit unit 3 via the parallel circuit of the right transverse electromagnetic switch 23 and the left transverse electromagnetic switch 24 and the three-phase cable 36. It has become. Further, an emergency stop electromagnetic switch 26 is connected in series to the three-phase wiring 22 of the trolley power supply circuit 21, and the supply power is cut off (opened) by the opening operation (non-operation) of the emergency stop electromagnetic switch 26. ).

  The trolley circuit unit 2 includes a transformer 25, and the primary side of the transformer 25 is connected to the S phase and the T phase of the three-phase wiring 22. On the secondary side of the transformer 25, the emergency stop operation switch 10 of the operation box circuit unit 1 and the exciting coil 26a of the emergency stop electromagnetic switch 26 are connected in series, and the emergency stop electromagnetic switch control circuit 31 is connected. Is configured. F1 is a fuse.

  The trolley circuit unit 2 controls an electromagnetic switch 23 for right traversing and an electromagnetic switch 24 for left traversing, and an electromagnetic switch control circuit for controlling an electromagnetic switch (detailed later) of the electric chain block circuit unit 4. 27. The electromagnetic switch control circuit 27 includes an exciting coil 23a of the right traversing electromagnetic switch 23 and an exciting coil 24a of the left traversing electromagnetic switch 24. The right traversing operation switch 11 and the left traversing operation switch 12 respectively. Connected in series. The operation box circuit unit 1 is connected to the emergency stop electromagnetic switch control circuit 31 and the electromagnetic switch control circuit 27 of the trolley circuit unit 2 by a plug socket 30 via a multi-core (here, seven-core) cable 29. It has become.

  The electric chain block circuit unit 4 includes a lifting motor 40, a lifting motor power supply circuit 41, an electromagnetic switch control circuit 42, and a transformer 43. A multi-core (here, 5-core) cable 32 connected to the electromagnetic switch control circuit 27 of the trolley circuit section 2 is connected to the electromagnetic switch control circuit 42 via a plug socket 34. The three-phase cable 33 connected to the three-phase wiring 22 of the trolley power supply circuit 21 is connected to the lift motor power supply circuit 41 via the plug socket 35. Further, a raising electromagnetic switch 44 and a lowering electromagnetic switch 45 are connected in parallel between the lifting motor power supply circuit 41 and the lifting motor 40. The primary side of the transformer 43 is connected to the S phase and the T phase of the lifting motor power supply circuit 41.

  The electromagnetic switch control circuit 42 of the electric chain block circuit unit 4 includes an upper limit switch (normally closed limit switch) 46, a lower limit switch (normally closed limit switch) 47, an excitation coil 44a of the electromagnetic switch 44 for raising, and a lowering. An exciting coil 45a of the electromagnetic switch 45 is provided. The electromagnetic switch control circuit 27 of the trolley circuit unit 2 and the electromagnetic switch control circuit 42 of the electric chain block circuit unit 4 are connected to the secondary side of the transformer 43 and are supplied with electric power from the transformer 43. . The lowering operation switch 13, the lower limit switch 47 of the operation box circuit unit 1, and the exciting coil 45 a of the lowering electromagnetic switch 45 are connected in series and connected to the secondary side of the transformer 43. Further, the raising operation switch 14, the upper limit switch 46, and the exciting coil 44 a of the raising electromagnetic switch 44 are connected in series and are connected to the secondary side of the transformer 43.

  In the control device for the load lifting and lowering transfer device having the above-described configuration, when the power from the three-phase cable 15 is turned on, the secondary current of the transformer 25 is supplied through the normally-closed emergency stop operation switch 10 to the emergency stop electromagnetic switch 26. The emergency stop electromagnetic switch 26 is closed. As a result, power can be supplied from the trolley power supply circuit 21 to the traversing motor 37 and the lifting motor 40.

  In this state, when the right traversing operation switch 11 of the operation box circuit unit 1 is closed, the secondary current of the transformer 43 flows in the exciting coil 23a of the right traversing electromagnetic switch 23, and the right traversing electromagnetic switch 23 is Close operation. When the right traverse electromagnetic switch 23 is closed, a right traverse (forward) starting current flows from the trolley power supply circuit 21 to the traverse motor 37, and the electric trolley 101 traverses in the right direction. When the left traversing operation switch 12 is closed, the secondary current of the transformer 43 flows through the exciting coil 24a of the left traversing electromagnetic switch 24, and the left traversing electromagnetic switch 24 is closed. When the left traversing electromagnetic switch 24 is closed, a left traversing starting current flows through the traversing motor 37 and the electric trolley 101 traverses in the left direction.

  When the lowering operation switch 13 is closed, the secondary current of the transformer 43 flows through the lower limit switch 47 to the exciting coil 45a of the lowering electromagnetic switch 45, and the lowering electromagnetic switch 45 is closed. A descending starting current flows from the lifting motor power supply circuit 41 to the lifting motor 40 and rotates in a direction (reverse rotation) in which the hook 109 is lowered. When the lower limit switch 47 is opened, the exciting current of the exciting coil 45a is cut off, the lowering electromagnetic switch 45 is opened (not operated), and the lowering operation of the lifting motor 40 is stopped. When the raising operation switch 14 is closed, the secondary current of the transformer 43 flows to the exciting coil 44a of the raising electromagnetic switch 44 through the upper limit switch 46, the raising electromagnetic switch 44 is closed, and the lifting motor A starting current for ascent is supplied from the power supply circuit 41 to the elevating motor 40 and rotates in the direction in which the hook 109 is raised and lowered (forward rotation). When the upper limit switch 46 is opened, the exciting current of the exciting coil 44a is cut off, the raising electromagnetic switch 44 is opened (not operated), and the raising operation of the lifting motor 40 is stopped.

When the emergency stop operation switch 10 of the operation box circuit unit 1 is opened, the secondary current of the transformer 25 flowing in the exciting coil 26a of the emergency stop electromagnetic switch 26 is cut off, and the emergency stop electromagnetic switch 26 is turned off. Becomes an open operation (non-operation). As a result, the trolley power supply circuit 21 that supplies power to the traverse motor 37 of the electric trolley 101 and the lifting motor 40 of the electric chain block 102 is shut off.
Japanese Utility Model Publication No. 5-86982

  In the control device of the conventional load lifting / lowering transfer device, one emergency stop is provided for the trolley power supply circuit 21 of the trolley circuit unit 2 that supplies power to the traverse motor 37 of the electric trolley 101 and the lifting motor 40 of the electric chain block 102. Since the electromagnetic switch 26 is provided, it is necessary to use a large-capacity electromagnetic switch 26 for emergency stop, and there is a problem that the cost is increased. In particular, when a plurality of electric chain blocks 102 are mounted on one electric trolley 101, the emergency switch electromagnetic switch 26 needs a larger capacity.

  In addition, the transformer 25 for driving the emergency stop electromagnetic switch 26 is provided in the trolley circuit unit 2, and the power transformer 43 of the electromagnetic switch control circuit 27 is also provided in the electric chain block circuit unit 4. There was a problem that the transformer was increased and the cost was increased accordingly.

  When the electric chain block 102 is used alone, the electric chain block circuit unit 4 is not provided with the emergency stop electromagnetic switch 26. For example, as shown in FIG. The elevator motor power supply circuit 41 is provided with an emergency stop electromagnetic switch 48 and the electromagnetic switch control circuit 42 is provided with an exciting coil 48a. The operation switch circuit 110 of the operation switch box 110 ′ when the electric chain block 102 is used alone is connected to the electromagnetic switch control circuit 42 by the plug socket 34 via the cable 49, and the emergency stop switch 10 is connected. It is necessary to cut off the current flowing through the exciting coil 48a by opening. That is, it is necessary to prepare an electric chain block in which the electric chain block circuit unit 4 is configured separately for the case where the electric chain block 102 is used alone and the case where the electric chain block 102 is mounted on the electric trolley 101. There is a problem of high cost. In particular, rental companies need to prepare two types of electric chain blocks, which increases the cost.

  The present invention has been made in view of the above points, and the capacity of the emergency stop electromagnetic switch can be small, and the same configuration is used when the electric chain block is used in combination with an electric trolley and when used alone. An object of the present invention is to provide a control device for a load lifting / lowering transfer device that can use a low-cost and low-cost transformer for a control power source.

  In order to solve the above-mentioned problems, an invention according to claim 1 is provided with an electric trolley and an electric load elevator mounted on the electric trolley, the electric trolley is provided with a traverse electromagnetic switch, and the traverse electromagnetic switch An electromagnetic switch control circuit for controlling the load is provided, and an electromagnetic switch for raising and lowering is provided in the electric load elevator, and an electromagnetic switch control circuit for controlling the electromagnetic switch for raising and lowering is provided, so that the load is traversed and lowered A control device for a load lifting and lowering transfer device, wherein a trolley power supply circuit that supplies power to a traverse motor of the electric trolley and a lift motor power supply circuit that supplies power to a lift motor of the electric load lift An emergency stop electromagnetic switch that shuts off the circuit and stops power supply is provided, and the operation switch box emergency stop operation switch is provided in the electromagnetic switch control circuit of the electric trolley. Provided with a circuit for opening the emergency stop electromagnetic switch of the trolley power supply circuit by the operation of the auxiliary contact of the electromagnetic switch for emergency stop of the trolley power supply circuit to the electromagnetic switch control circuit of the electric load elevator And a circuit for opening the emergency stop electromagnetic switch of the lifting motor power supply circuit.

  According to a second aspect of the present invention, in the control device for the load lifting and lowering transfer device according to the first aspect, the lifting motor is used as a power source for the electromagnetic switch control circuit of the electric trolley and the electromagnetic switch control circuit of the electric load lifting machine. A secondary side output of a transformer provided in the power supply circuit is used.

  According to a third aspect of the present invention, in the control device for the load lifting / lowering transfer device according to the first or second aspect, the electromagnetic switch control circuit of the electric trolley and the electromagnetic switch control circuit of the electric load lift are connected via a cable. It is configured to be connected by plug socket connection.

  According to a fourth aspect of the present invention, in the control device for a load lifting / lowering transfer apparatus according to any one of the first to third aspects, when the electric load lifting / lowering device is used alone, the electromagnetic opening / closing of the electric load lifting / lowering device is performed. An operation switch box having an emergency stop operation switch is connected to the device control circuit by a plug socket connection via a cable.

  According to the first aspect of the present invention, the emergency stop electromagnetic switch is provided in the trolley power supply circuit and the lifting motor power supply circuit by interrupting the respective circuits and stopping the power supply. The capacity of the vessel is small, and the cost is reduced accordingly. Also, since the same electric load elevator can be used when the electric load elevator is mounted on an electric trolley and when it is used alone, a rental company, in particular, needs to have one type of electric load elevator. Is less.

  According to the invention of claim 2, since the secondary side output of the transformer provided in the lifting motor power supply circuit is used as the power source of the electromagnetic switch control circuit of the electric trolley and the electromagnetic switch control circuit of the electric load elevator, There is no need to provide a transformer for the control power source in the electric trolley, and the cost is reduced accordingly.

  According to the third aspect of the present invention, since the electromagnetic switch control circuit of the electric trolley and the electromagnetic switch control circuit of the electric load elevator can be connected by plug socket connection, the connection between both is extremely easy. It becomes.

  According to the fourth aspect of the present invention, when the electric load elevator is used alone, the operation signal cable from the operation box having the emergency stop operation switch is provided in the electromagnetic switch control circuit of the electric load elevator. Since it is configured so that it can be connected by plug coupling, the operation for using the electric load elevator alone becomes extremely easy.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a diagram showing a circuit configuration of a control device of the load lifting / lowering transfer apparatus according to the present invention. In FIG. 4, the parts denoted by the same reference numerals as those in FIGS. 2 and 3 indicate the same or corresponding parts. As shown in FIG. 4, the present control device includes a trolley power supply circuit 21 that supplies power to the traverse motor 37 of the trolley circuit unit 2, and a lift motor power that supplies power to the lift motor 40 of the electric chain block circuit unit 4. The supply circuit 41 is provided with an emergency stop electromagnetic switch 50 and an emergency stop electromagnetic switch 51, respectively.

  An exciting coil 50a and an auxiliary contact 50b of the emergency stop electromagnetic switch 50 are arranged in the electromagnetic switch control circuit 27 of the trolley circuit unit 2. The exciting coil 50a of the emergency stop electromagnetic switch 50 is energized with the secondary current of the transformer 43 provided in the electric chain block circuit unit 4 through the emergency stop operation switch 10 of the operation box circuit unit 1. Further, the exciting coil 51 a of the emergency stop electromagnetic switch 51 is arranged in the electromagnetic switch control circuit 42 of the electric chain block circuit unit 4. The auxiliary contact (normally open contact) 50b of the emergency stop electromagnetic switch 50 and the exciting coil 51a of the emergency stop electromagnetic switch 51 are connected in series, and the secondary current of the transformer 43 is supplied to the series circuit. ing.

  In the control device of the load lifting and lowering transfer device having the configuration shown in FIG. 4, when the switches of the operation box circuit unit 1 are not operated, the emergency stop operation switch (normally closed) is applied to the exciting coil 50 a of the emergency stop electromagnetic switch 50. The secondary current of the transformer 43 flows through the switch 10, and the emergency stop electromagnetic switch 50 is closed. As a result, power can be supplied from the trolley power supply circuit 21 to the traversing motor 37. Further, since the auxiliary contact 50b is also closed by the closing operation of the emergency stop electromagnetic switch 50, the secondary current of the transformer 43 flows through the exciting coil 51a of the emergency stop electromagnetic switch 51, and the emergency stop electromagnetic switch 51. Is closed. As a result, power can be supplied from the trolley power supply circuit 21 to the lifting motor 40.

  In the above state, when the right traversing operation switch 11 of the operation box circuit unit 1 is closed, the secondary current of the transformer 43 flows through the exciting coil 23a of the right traversing electromagnetic switch 23, and the right traversing electromagnetic switch 23 is The closing current flows to the traverse motor 37, and the electric trolley 101 traverses in the right direction. When the left traversing operation switch 12 is closed, the secondary current of the transformer 43 flows in the exciting coil 24a of the left traversing electromagnetic switch 24, the left traversing electromagnetic switch 24 is closed, and the traversing motor 37 is left traversed. The starting current flows, and the electric trolley 101 traverses in the left direction.

  When the lowering operation switch 13 is closed, the secondary current of the transformer 43 flows through the lower limit switch 47 to the exciting coil 45a of the lowering electromagnetic switch 45, and the lowering electromagnetic switch 45 is closed. A descending starting current flows and rotates in the descending direction (reverse rotation). When the lower limit switch 47 is opened, the exciting current of the exciting coil 45a is cut off, the lowering electromagnetic switch 45 is opened (not operated), and the lowering operation of the lifting motor 40 is stopped. When the raising operation switch 14 is closed, the secondary current of the transformer 43 flows to the exciting coil 44a of the raising electromagnetic switch 44 through the upper limit switch 46, and the raising electromagnetic switch 44 is closed to supply the lifting motor power. A rising starting current flows from the circuit 41 to the lifting motor 40 and rotates (forward rotation) in the rising direction. When the upper limit switch 46 is opened, the exciting current of the exciting coil 44a is cut off, the raising electromagnetic switch 44 is opened (not operated), and the raising operation of the lifting motor 40 is stopped.

  When the emergency stop operation switch 10 of the operation box circuit unit 1 is opened, the energization of the exciting coil 50a is cut off, and the emergency stop electromagnetic switch 50 is opened (not operated), and the trolley power supply circuit 21 is opened. As a result, power cannot be supplied from the trolley power supply circuit 21 to the traversing motor 37. Further, since the auxiliary contact 50b is opened by the opening operation (non-operation) of the emergency stop electromagnetic switch 50, the energization of the exciting coil 51a of the emergency stop electromagnetic switch 51 is cut off, and the emergency stop electromagnetic switch 51 is turned off. Is an open operation (non-operation). As a result, power cannot be supplied from the lifting motor power supply circuit 41 to the lifting motor 40.

  As described above, the emergency stop electromagnetic switch 50 and the emergency stop electromagnetic switch 51 are provided in the trolley power supply circuit 21 of the trolley circuit unit 2 and the lifting motor power supply circuit 41 of the electric chain block circuit unit 4, respectively. Thus, the emergency stop electromagnetic switches 50 and 51 only supply power to the traversing motor 37 and the lifting motor 40 of the electric trolley, respectively, and can be covered with a small capacity electromagnetic switch. In addition, since it is not necessary to provide a transformer for supplying control power to the trolley circuit unit 2, the cost can be reduced accordingly.

  Further, when the electric chain block is used alone, as shown in FIG. 5, the electric chain block including the electric chain block circuit unit 4 having the same configuration as the electric chain block circuit unit 4 of FIG. 4 is used. The operation box circuit unit 60 of the operation box 110 ′ for operating the electric chain block alone is connected to the electric chain block circuit unit 4 through the cable 61 by the plug socket 34. As a result, the load can be raised and lowered. That is, when the electric chain block is mounted on the electric trolley and used alone, the electric chain block circuit section 4 having the same circuit configuration is sufficient even when the electric chain block is used alone. Equipment cost can be reduced because it can be used even if it is installed in the system. In particular, rental companies can save money because there is no need to facilitate two types of electric chain blocks.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. In addition, any configuration not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, in the above-described embodiment, an example of an electric chain block has been described as an electric load elevator. However, the electric load elevator is not limited to an electric chain block. For example, an electric hoist may be used. Moreover, it is also possible to use an overhead traveling crane using the load lifting / lowering transfer device 100.

It is a figure which shows the structure of the load raising / lowering transfer apparatus provided with the electric trolley and the electric chain block, FIG. 1 (a) is a front view, FIG.1 (b) is a side view. It is a figure which shows the circuit structural example of the control apparatus of the conventional load raising / lowering transfer apparatus. It is a figure which shows the circuit structural example of the control apparatus in the case of using an electric chain block independently. It is a figure which shows the circuit structural example of the control apparatus of the load raising / lowering transfer apparatus which concerns on this invention. It is a figure which shows the circuit structural example of the control apparatus in the case of using an electric chain block independently.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Operation box circuit part 2 Trolley circuit part 3 Trolley motor circuit part 4 Electric chain block circuit part 10 Emergency stop operation switch 11 Right traverse operation switch 12 Left traverse operation switch 13 Lowering operation switch 14 Raising operation switch 15 3 Phase cable 21 Trolley power supply circuit 22 Three-phase wiring 23 Right traverse electromagnetic switch 24 Left traverse electromagnetic switch 25 Transformer 26 Emergency stop electromagnetic switch 27 Electromagnetic switch control circuit 29 Three-phase cable 30 Plug socket 31 Emergency stop Electromagnetic switch control circuit 32 Cable 33 Three-phase cable 34 Plug socket 35 Plug socket 36 Three-phase cable 37 Traverse motor 40 Lifting motor 41 Lifting motor power supply circuit 42 Electromagnetic switch control circuit 43 Transformer 44 Lifting electromagnetic switch 45 Lowering Electricity Switch 46 upper limit switch 47 lower limit switch 48 Emergency stop electromagnetic switch 49 cable 50 Emergency stop electromagnetic switch 51 Emergency stop electromagnetic switch 60 operation box circuit unit 61 Cable

Claims (4)

An electric trolley and an electric load elevator mounted on the electric trolley, the electric trolley is provided with a traverse electromagnetic switch, and an electromagnetic switch control circuit for controlling the traverse electromagnetic switch is provided; A lifting / lowering electromagnetic switch, and an electromagnetic switch control circuit for controlling the lifting / lowering electromagnetic switch.
An emergency stop that shuts off the power supply by shutting off the power supply circuit that supplies power to the traverse motor of the electric trolley and the power supply circuit of the lift motor that supplies power to the lift motor of the electric load elevator. For electromagnetic switch,
The electric trolley electromagnetic switch control circuit is provided with a circuit for opening the emergency stop electromagnetic switch of the trolley power supply circuit by operating the emergency stop operation switch of the operation switch box, and the electric load elevator electromagnetic The switch control circuit includes a circuit for opening an emergency stop electromagnetic switch of the lifting motor power supply circuit at an auxiliary contact of the emergency stop electromagnetic switch of the trolley power supply circuit. Control device for the device. In the control device of the load lifting and lowering transfer device according to claim 1,
A load lifting and lowering transfer device characterized in that a secondary output of a transformer provided in the lifting motor power supply circuit is used as a power source for an electromagnetic switch control circuit of the electric trolley and an electromagnetic switch control circuit of the electric load elevator. Control device. In the control device of the load lifting and lowering transfer device according to claim 1 or 2,
A control device for a load lifting and lowering transfer device, wherein the electromagnetic switch control circuit of the electric trolley and the electromagnetic switch control circuit of the electric load lifting and lowering device can be connected by a plug socket connection via a cable. In the control device of the load lifting and lowering transfer device according to any one of claims 1 to 3,
When the electric load elevator is used alone, an operation switch box having an emergency stop operation switch can be connected to the electromagnetic switch control circuit of the electric load elevator by plug socket connection via a cable. A control device for a load lifting and lowering transfer device.

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