JPS5972904A - Carriage device using linear motor - Google Patents

Abstract

PURPOSE:To facilitate the restart of a carriage device by providing an electromagnetic mechanical brake operating at a power interruption time in the secondary side of a linear motor installed on rails, thereby effectively stopping and holding a carriage truck at the primary side at the power interruption time. CONSTITUTION:The primary sides 1a-1c of a linear motor m are respectively installed on stations A1-A3 on a passage of raisls 3, and the secondary side 4 is provided on a carriage truck 2. Further, an electromagnetic mechanical brake 10 is provided at the primary side. A power source is applied to the solenoid of the brake 10 at the normal operation time, and brake shoes 17, 18 are towed and held externally. When a power is interrupted, the solenid of the brake 10 is demagnetized, the shoes 17, 18 are respectively inwardly pushed by springs 22, 23. In this manner, the truck 2 entered into the station is interposed by the shoes 17, 18.

Description

Detailed Description of the Invention The present invention relates to a conveyance vehicle using a linear motor, and particularly relates to a conveyance device in which the primary side (stator side) of the linear motor is provided only on the stage side. Regarding equipment〇In general, a structure is adopted in which a linear motor is used and the primary side of the motor is installed along the entire track in order to transport carts loaded with luggage, etc., but there are problems such as increased equipment costs. Ashi,
In loading and unloading cargo, processing and assembly lines, etc., it is sufficient to stop at each station, so there is no need to install the motor next side over the entire length, and the motor next side can be installed only at each station. There is. Therefore, the cart is driven at a station, runs by inertia due to the applied acceleration force to the next station, is braked at that station, and is then sent out again to the next station.

However, in this case, if a power outage occurs while the bogie is in operation, the bogie will run only by inertia, and the braking force will be lost at the station, so the bogie will not necessarily stop at the station, but will stop in the middle of the station. In many cases, the cart stopped in the middle area has no driving force even if the motor & (tffl of each station is energized and energized.
Therefore, there is a problem that it is necessary to take steps such as manually transporting the trolley to the station.The present invention has been made in view of this problem, and even if the trolley is stopped while being taken, the station is always automatically moved to the station. The purpose of this system is to ensure that when the motor stops on the next side and is reenergized, it will start up again, allowing operation to resume without interfering with transport.

The present invention will be described below based on embodiments shown in the drawings.

The figure shows an example in which the present invention is applied to a linear step motor, where 1a, 1b, and ic are used for loading cargo on the path of the track 3, processing 1, assembly, unloading, etc. 7--Shi W A1.
A, It, A3 (hereinafter referred to simply as a person), and provided at appropriate intervals, the primary side of a near step motor (hereinafter referred to simply as 1), and a transport vehicle. 2 has a secondary side 4 corresponding to the secondary side 1.
is established.

A linear step motor M is formed by the above-mentioned primary side 1 and secondary side 4, and the transport vehicle 2 is driven and travels by the operation of the primary side 1 of these linear step motors M,
It stops at each station and moves to the next station after work.

As shown in FIG.
A number of motor windings 5 are arranged between the magnetic core 6 and the track 3.
．． It is placed at right angles to 3.

The transport vehicle 2 is equipped with running wheels 7°7 relative to the track 6.6, and faces the secondary side 1 with a small gap between them.
! I4 is provided and the secondary i11! Grooves 8 of equal pitch are provided in I4, and the conveyor truck, which sequentially switches and energizes the negative side winding through a switching circuit, follows this and travels.

In the above configuration, the present invention provides an electromagnetic brake on each of the downstream sides 1, and when the braking force of the linear motor is lost during a power outage, the system automatically enters the system by inertia using the brake. The electromagnetic mechanical brake 10, the electromagnet 11, the brake seats 17 and 18 installed opposite to each other on both sides of the carrier 20, and the electromagnet 11 and each The main components are connecting bars 20 and 21 that connect the playxies 17 and 18, and springs 22 and 25 that always bias the playxies 17 and 18 toward the transport vehicle 2.

The electromagnet 11 includes left and right pairs of solenoids 12 and 16,
With a quad 14.15 inserted into each solenoid 12.15? The springs 22 and 23 are attached to the ronds 14 and 15, which are always biased outward.

The connecting bars 20 and 21 each have an intermediate portion connected to the frame 9.
The lower end of the connecting bar 20.21 is rotatably connected to the ground by a pin 24.25, and the lower end of the connecting bar 20.21 is
and pins 26 and 27, and the upper end is
7 and 18 and pins 28 and 29, respectively.

The brake seats 17 and 18 are in the approach direction B of the transport vehicle 2.
The entrance side is expanded outward (to make it easier for the trolley 2 to enter), and the carriage 2 is moved by the spring 2 on the side opposite to the entrance side.
It is designed to clamp and stop under a pressing force of 2.25 mm, and the illustrated example shows a structure in which the electromagnetic mechanical brake 10 is provided only on one side of the primary side 1 of the linear motor M. When the transfer carriage 2 reciprocates, it is preferable to provide each of the cuttings on the negative side 1, and the electromagnetic brake 10 may be provided at an appropriate location in the station A, but Select the mounting position so that it stops above 1.

Figure 5 shows a block circuit diagram of the control circuit 0.
The control circuit 30 includes a switching circuit 52 that sequentially applies a pulse signal to the winding source 5 on the negative side 1, and a pulse generating IgJ that applies a pulse signal to the switching circuit 32.
The circuit 35 is composed of a pulse applying means 61, a brake circuit 64 for each of the solenoids 12, 13, and a rectifier 35 for applying direct current to these.

The switching circuit 32 is designed to be operated by a combination of a stepping relay and its driving circuit, or by program control of a microfuminator.

A direct current is applied as a source to the switching circuit 32 and the pulse generation circuit 1455's through the rectifier 35, and is simultaneously applied to the solenoid 12. Brake sea
17 and 78 are pulled outward and held at 1.

The switching circuit 62 and the pulse generating circuit 63 apply a pulse voltage from an external oscillator or a computer to the switching circuit 32, and turn ON and 0FIF by the pulse.
In response to a command, a pulse signal is applied by sequentially switching to a large number of coils of the winding ball 5 on the primary side 1, thereby applying a thrust to the secondary side, that is, the transport vehicle.

In addition, the positioning of the transport vehicle 2 is performed using a linear step motor M.
It is determined by the structure of the part 8, especially the pitch of part 8 and the number of phases of the coil, and the excited magnetic core and one tooth of part 8 stand still in opposing positions, but by adjusting the excitation current of the magnetic core, they can be brought into instantaneous contact. It can also be positioned in the middle of the magnetic core.

Next, when the transport vehicle 2 is traveling on the track and there is a power outage in the middle section of each stage A, the switching circuit 32 and the pulse generation circuit 63L are opened, and at the same time the solenoids 12 and 13 of the electromagnetic mechanical brake 1o are also demagnetized, and the spring 22
．． 23 forces the brake shoes 17, 18 inwardly. As a result, the transport vehicle 2 continues to run due to the accumulated kinetic energy, and when it enters the station run A, it is clamped by the brake seams 17 and 18 and stops above the motor next side 1 of the stay 912. .

Therefore, when the power supply #36 is restored and energized, the transport vehicle 2 can be restarted by excitation of the primary side 1 of the linear step motor M of the corresponding step 4, and normal operation can be performed. can.

Although the explanation has been omitted, each stage of the transport vehicle 2 is
The stop position, stop time, etc., are commanded and controlled by other appropriate means, such as a microphone calculation computer.

In addition, although the above explanation is based on the case where there is only one transport vehicle, it can also be applied when multiple transport vehicles are operated, and the linear motor is not limited to the above-mentioned linear step motor. Of course, the present invention can be applied to a conveyance device using a normal linear motor.

Furthermore, in the above explanation, in order to compensate for the automatic movement of the transport vehicle during a power outage, a part of the track between each stage, for example near the exit of stage 4, is made slightly higher than other parts. It may also be adopted as appropriate.

As described above, according to the present invention, even if a conveyance vehicle that travels through a plurality of stage sections provided at an appropriately desired distance has a power outage between the stages, the self-sliding When you reach the next stage,
Since the brake position '#, which becomes the braking position in the event of a power outage, can be stopped and held on the primary side of the linear motor by the magnetic brake, the advantage is that normal automatic operation can be performed immediately after the power is restored. have

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is an explanatory diagram of the operation of the linear motor, FIG. 2 is a vertical cross-sectional view of the main parts, and FIG.
The figure is a plan view of the stage, FIG. 6 is an explanatory diagram of the main parts of the electromagnetic brake, and FIG. 5 is a control circuit diagram. 1a, Ib, 1c - Primary side 2...Transportation vehicle 3...Track 4...Secondary side 10...Electromagnetic mechanical brake A1. AI A3...Stage Soun M...Linear step motor patent applicant Hitachi Machinery/Kame Kogyo Co., Ltd. Agent
Kiyoshi Hayashi 1 person other than Akira 1939/877th Japan Patent Office Commissioner Kazuo Wakasugi 1, Incident display q', Kiyoshi Kiyoshi/7-2〆2Jθ 2 Axis Akira's name Linear morph 4 towns... kaki J, mu [section f-3, relationship with the amended person case Wait R 乍Applicant 4, brief explanation of the drawings The receiving part shows the embodiment of the present invention, and the whistle 1 is +7
An explanatory diagram of the operation of the near motor, a vertical cross-sectional view of the main parts for the second intake, a plane (support) at the third station, an explanatory diagram of the main parts of the fourth electromagnetic mechanical brake, and a control circuit diagram for the fifth prevention. be. 1a, jb, 1a, - next side 200. Transport platform east 310. Orbit 400. Nik side 10, , , electromagnetic mechanical brake A1. A2. A3. Station “ ・ ・ ・ “1 °7 X f ” / 2%-
Ta. 21-

Claims (1)

[Claims] A linear motor is provided in which a plurality of stages are arranged on a track, and a primary winding section is provided at each section of the stage. 1. A transport device using a linear motor, characterized in that the negative side winding section is provided with an electromagnetic mechanical brake for stopping and holding the transport vehicle in the event of a power outage.