JPH048158A - Cooling unit of linear motor for driving carrier truck - Google Patents

Abstract

PURPOSE:To cool a stator efficiently by projecting a plurality of fins from a bracket for fixing the stator of a linear motor and further projecting fins from the rail of travel path. CONSTITUTION:A bracket for fixing the stator 6 of a linear motor to the frame of a travel path 1 is made of a material having high heat conductivity, e.g. aluminum, and a multiplicity of fins 38 are arranged on the mover side in the removing direction of a carrier truck 3 and projected in parallel in the vertical direction with a predetermined pitch. Furthermore, a multiplicity of fins 39 are projected in the longitudinal direction of the rail at positions on the rail 1R of the travel path 1 where a wheel 32 supporting the load of the carrier truck 3 or a horizontal guide roller 33 does not contact. Since heat is radiated naturally through the fins when the truck travels, no other cooling facility is required.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is designed to dissipate heat from the stator of a linear motor for driving a transport vehicle that travels along a predetermined travel path and transports articles to its mounting bracket and rail. The invention relates to a device that naturally cools the air.

[Conventional technology]

Conventionally, in a device that sorts items such as parcels and letters into their destinations and other areas, an endless conveyor line is installed, a supply line and a sorting line are installed at arbitrary points on this conveyor line, and a large number of The tray truck is connected to a chain conveyor, and the tray truck is run. Therefore, the drive of the chain conveyor generates a lot of noise, and the structure is disadvantageous in that it requires multiple calculations.

For this reason, methods of driving the tray cart with a linear motor are proposed, for example, in Japanese Patent Application Laid-open Nos. 57-137218 and 60-41584.
No. 63-165218.

[Problem to be solved by the invention]

When driving a transport vehicle with a linear motor, heat is generated in the stator of the linear motor. Conventionally, this stator was usually cooled naturally.

However, it is desirable that the amount of heat generated by the stator does not change depending on the load of the transport vehicle, continuous operation time, room temperature, etc., and that the stator does not reach a high temperature.

An object of the present invention is to naturally and efficiently cool a stator when a transport vehicle is driven to travel by a linear motor.

[Means to solve the problem]

The present invention has been made to achieve the above-mentioned object, and a plurality of sorting machines are arranged on a loop-shaped running path equipped with a chute;
In a device in which this bogie is run by a linear motor, a plurality of fins are provided protruding from the stator mounting bracket of the linear motor, and fins are also provided on the rails of the running path where heat is conducted from the stator. The gist is to naturally dissipate heat from the installed linear motor stator.

[For production]

By installing a large number of fins on the bracket for mounting the stator of the linear motor installed in the running track, and also protruding fins from the rail, the placket and rail can be made of materials with good thermal conductivity as necessary. It promotes natural heat dissipation of the stator and allows efficient and appropriate cooling.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a cooling device for a linear motor for driving a transport vehicle according to the present invention will be explained based on the illustrated embodiments.

The apparatus of the present invention will be explained based on an embodiment of an article sorting apparatus having a traveling path as shown in the drawings.

The traveling path 1 is formed into a loop shape, the intermediate portions are overlapped one above the other, the traveling path is inclined at the loop portions at both ends, and the goods are loaded onto the transport vehicle at a predetermined position on the lower side of the loop-shaped traveling path, and the goods are loaded on the lower side or the upper side. A large number of sorting chutes 2a, 2b, . In a part of path IZ or curved path IX, transfer conveyors 4a, 4b...
At the same time, a plurality of transport vehicles 3, 3, etc. are arranged along the entire length of this loop-shaped running path l. All transport vehicles run at the same time. The transport vehicle 3 is moved by several linear motors 6 arranged at appropriate intervals at one end of the travel path 1, for example, at the end opposite to the transfer conveyor.
A large number of transport vehicles placed on the traveling path 1 are simultaneously transported. Where can this linear motor 6 be placed on the travel path? 2'll can. In addition, the straight path I
Two or three units can be installed at the end of Z, and two or three units can be installed at the end of the upper straight path IY to provide further thrust to the bogie that has ascended this curved path. As a result, several linear motors 6 are disposed at the upper and lower ends of the straight road near one of the curved roads, and maintenance can be easily performed.

By distributing and arranging the linear motors in several units in this way, it is possible to reduce the tension in the pan connection part, making the structure of the pan connection part smaller and lighter, and distributing the tension. , there is an advantage that the capacity of the linear motor can be reduced.

Note that the traveling speed and braking of the transport vehicle are controlled by this linear motor 6.

In addition, in order to more efficiently drive the transport vehicle with this linear motor 6, the linear motors 6 are arranged so as to face both sides of the reaction plate 31, which is vertically installed on the lower surface of the transport vehicle 3, as shown in the figure. are installed, and these two
This reaction plate 3 can be used as a set or near motor 6.
Thrust is applied from both sides of 1 at the same time.

Moreover, the linear motor 6 is fixed to the frame of the running path l.

The transport vehicle 3 is shown in FIGS. 1 and 2. This transport vehicle 3 is divided into an upper unit 3A which mainly performs loading and unloading, and a lower unit 3B which mainly performs traveling and connection between the vehicles.
The lower unit 3B is made compatible so that it can be used in conjunction with any other unit. By making the lower unit 3B common and making the shape of the upper unit 3A according to the type of article, it is possible to sort various articles.

The lower unit 3B of the transport trolley 3 has a reaction plate 31 vertically disposed at the center of the lower part of a trolley body 30 having a predetermined size along the running direction of the trolley, and has a reaction plate 31 hanging from the front side of the trolley main body 30 in the running direction. Wheels 32 and 32 are rotatably supported on both sides, and are vertically protruded downward to rotatably support horizontal rollers 33 and 33, respectively. are supported by the same rail IR. In other words, the wheels 32 are in contact with the top surface of the rail IR and can run while supporting the entire load applied to the lower unit and the upper unit,
The horizontal rollers 33 are in contact with the inner surface of the rail IR, and support the overturning moment applied to the carriage when the carriage is traveling or stopped, thereby stably maintaining the transport carriage in a predetermined posture.

Furthermore, a connecting tool 34 such as a ball joint is provided protruding from the front central portion of the truck body 30, and a connecting tool 34 is provided protruding from the center of the rear side of the truck main body 30 adjacent to the front. The front and rear truck bodies 30 and 30 are connected to each other so that they can be bent vertically and horizontally within a permissible angle.

The upper unit 3A has a required size and shape, and is provided with a pan 36 supported by a pan support bracket 35 on the upper part so as to be swingable and tiltable. The pan 36 may be V-shaped or otherwise shaped to ensure reliable transfer of articles. bread 3
A pan tilting device 37 is disposed on the back side of both side plates 6.

Furthermore, the stator generates heat due to the drive of the linear motor. If this stator heats up and reaches a high temperature above the allowable value, the thrust will decrease, so it is necessary to cool the stator. In the present invention, it is preferable that the bracket used for attaching the stator of the near motor to the running track frame is made of a material with good thermal conductivity.
For example, aluminum/aluminum alloy is used, and a large number of fins 38 are provided protruding from the movable element side C.

In the illustrated embodiment, the brackets are arranged in the longitudinal direction of the bracket, that is, in the traveling direction of the carrier, and are provided in a protruding manner parallel to the vertical direction at a predetermined pitch.

Further, a large number of fins 39 are provided protruding in the longitudinal direction of the rail at the rail IR of the running path and at a position where the wheels 32 for supporting the load of the transport vehicle and the horizontal rollers 33 for guide do not come into contact with each other. The fins 39 provided on this rail can be provided to protrude directly from the rail, but the fins may also be provided to protrude from a bracket to which the rail is attached. However, this rail or rail mounting bracket is designed so that the heat generated by the stator of the near motor is conducted directly or via the stator mounting bracket.

In this way, the heat generated by the stator can be naturally radiated and cooled by the heat radiating fins provided on the mounting brackets and rails, but air flow is also generated by the movement of the transport vehicle. Furthermore, the cooling effect is improved, and the near motor stator can be cooled without providing a cooling fan or the like.

〔Effect of the invention〕

According to the present invention, a large number of heat dissipating fins are provided protruding from the mounting bracket of the near motor stator, etc., so that when the trolley is simply traveling, heat is naturally dissipated by these fins and other cooling equipment etc. The stator of the linear motor is efficiently cooled without using it.

[Brief explanation of drawings]

Figure 1 is an external view of the present invention, a cooling device for a linear motor for driving a transport vehicle, Figure 2 is a front view of the transport vehicle, Figure 3 is an example of a running path, and Figure 4 is a known section. be. 1 is a running path, 3 is a transport platform L, 31 is a reaction plate, 38 and 39 are fins, and 6 is a stator of a linear motor. Patent applicant Hitachi Mechanical Engineering Co., Ltd.

Claims (1)

[Claims] (1) In a device in which a large number of transport carts equipped with tiltable pans are connected to each other on a loop-shaped running path equipped with a plurality of sorting chutes, and the carts are driven by a linear motor, A transport vehicle drive characterized in that a plurality of fins are provided protrudingly on the stator mounting bracket of the motor, and fins are also provided on the rails of the traveling path through which heat is conducted from the stator, allowing the linear motor stator to naturally radiate heat. Cooling device for linear motors.