JPS63277119A - Linear motor driven transport device for sorting - Google Patents

Abstract

PURPOSE:To prevent drop of transported articles with simple construction by furnishing a rotor braking means at a sorting conveyor, arranging a primary coil for linear motor in the sorting position, and allowing the electromagnetic attraction force of this primary coil to cause the brakes to be out of effect. CONSTITUTION:Supplying current to the primary coil 23 of a linear motor for propelling of a truck causes the truck 1 to run along a guide rail 6. Meantime a roller braking means 8 is actuated to hinder idling of the roller 12, and drop of the article transported is prevented. When the sorting position is attained, the moving magnetic field generated by supplying current to the primary coil 25 of another linear motor for driving of conveyor rotates the roller 12 of the sorting roller conveyor 4, and at the same time, electromagnetic force of the primary coil 25 is applied to the braking means 18 through a control and rising/sinking part 19 made of magnetic substance, to cause the brakes to become out of effect. Thus the roller is hindered from idling during running to lead to prevention of the article from dropping.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a method for sorting objects that are carried on a trolley on a certain path into a plurality of preset positions on the path. Arbitrary sorting within the range is carried out horizontally and horizontally depending on the position, and the sorting driven by a linear motor is related to the conveyance device.

(Prior Art and its Problems) The present applicant has previously proposed a sorting and conveying device driven by a linear motor. This sorting conveyor is equipped with a sorting conveyor for conveying in left and right directions with respect to the traveling direction on each traveling cart that travels in a connected state on a fixed traveling route, and a rotary body of this conveyor, That is, if the conveyor is a slat conveyor, each slat connected in an endless manner, or if a roller conveyor, each roller is provided with a secondary conductor for a linear motor, and each sorting set in the constant traveling route is arranged at a position. A primary coil for a linear motor is disposed to rotate the rotating body of the conveyor via the secondary conductor.

In such a sorting and conveying device, the rotational resistance of the rotating body of the conveyor is very small compared to a case where the rotating body of the conveyor is interlocked and connected to a motor via a speed reducer or the like. or,
Keeping the rotational resistance as low as possible also reduces power loss and enables efficient rotational drive.

However, due to the extremely low rotational resistance of the rotating body of the conveyor, vibrations caused by the running of the conveyor cart on which the conveyed objects are placed and centrifugal force caused by the running of the conveyor at the horizontal U-turn section. , the conveyed object on the conveyor easily moves on the conveyor with the free rotation of the conveyor rotating body,
There was a risk that it would accidentally fall off the conveyor.

Of course, as is well known in the art, it would be sufficient to provide a stopper for preventing the conveyed objects from falling, which can move forward and backward at the end of the conveyor in the conveyance direction, but not only is a means for driving this stopper forward and backward, but also, It is necessary to supply and control power such as electric power to the drive means, which reduces the meaning of driving the conveyor on the trolley with the primary coil for the linear motor on the ground side, and also leads to a significant increase in costs.

(Means for Solving the Problems) The present invention proposes a sorting and conveying device that can solve the above-mentioned problems. A conveyor for sorting is installed on each trolley that travels in the left and right directions with respect to the traveling direction, and a secondary conductor for a linear motor is provided on the rotary body of this conveyor, and a secondary conductor for a linear motor is installed on the rotating body of this conveyor. A primary coil for a linear motor for rotationally driving the rotary body of the conveyor is disposed at each sorting position, and a braking means for the rotary body of the conveyor is provided, and the braking means is provided with a braking state. a spring that presses the conveyor, and an operation part that opposes a part of the primary coil and releases the brake against the spring, and when the conveyor corresponds to a primary coil for a linear motor that is energized, The present invention is configured such that the operating section is attracted and driven by the electromagnetic attraction force of the primary coil, and the braking means is released.

(Function of the Invention) In the above-mentioned sorting conveying device according to the present invention, when the conveyed objects supported on the conveyor are being conveyed by the running of each cart, the conveyor is The rotating body is braked by the braking means, which is biased to a braking state by a spring, and is in a state where it cannot easily rotate. Therefore, the conveyed object on the conveyor is prevented from floating and falling from the conveyor in the carrying-out direction with the idle rotation of the conveyor rotating body.

Then, the loaded objects are sorted by energizing the primary coil for the linear motor just before the trolley arrives, and the braking means on the trolley passing the position is activated. The operating section is attracted and driven by the electromagnetic attraction force of some coils on the ground side, and the braking means is released against the spring, and at the same time, the moving magnetic field of the primary coil moves the rotating body of the conveyor on the trolley. Since it is rotationally driven in a predetermined direction via a secondary conductor, the loaded object can be carried out in a predetermined direction.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In FIG. 1, reference numeral 1 denotes a cart that moves on a horizontal circulation path 2, and is connected endlessly by a coupler 3, and a roller conveyor 4 is used for sorting and conveying in left and right directions with respect to the running direction. We are prepared. Reference numeral 5 denotes a sorting chute, and the sorting chute set at an appropriate position on the travel route 3 is placed beside the route.

As shown in FIGS. 2 and 3, each of the bogies 1 has idle wheels 7 fitted in a pair of horizontally opposed groove-shaped guide rails 6 forming the travel path 2 on the front and rear sides of the left and right frames 8. A vertical shaft roller 10 for steady rest, which is close to the inner surface of the guide rail 6, is pivotally supported at the outer end of the fixed support shaft 9, which is provided on the outside of both ends and pivotally supports each wheel 7.

The sorting roller conveyor 4 includes a plurality of conveyor rollers 12 that are pivotally supported between a pair of front and rear conveyor frames 11 installed between the front and rear ends of the left and right frames 8. Each roller 12 includes an iron cylindrical body 13 and an iron cylindrical body 1 as shown in FIGS. 4 and 5.
A peripheral wall is formed of an aluminum cylindrical layer 14 that is formed on the outside of the linear motor and serves as a secondary conductor plate of the linear motor.
5 is fixed internally, and is rotatably supported on a fixed support shaft 16 via a bearing 17.
Two permanent magnets 15 are internally fixed at two locations in the axial direction, and each permanent magnet 15 is an annular body with magnetic poles located at both ends in the axial direction,
Two axially adjacent permanent magnets 15 are oriented such that adjacent magnetic poles attract each other.

As shown in FIGS. 2 and 3, the roller conveyor 4 is provided with a roller braking means 18. This roller braking means 18 includes a lifting member 19 made of a magnetic material that also serves as an operation part and is arranged below the small-diameter braked part 12a formed at the same end of each roller 12 in the roller row direction. A braking shoe 20 attached to the elevating member 19 so as to be in contact with the small-diameter braked portion tZa, an elevating guide rod 21 that guides and supports both ends of the elevating member 19 so as to be able to rise and fall freely, and a lifting guide rod 21 that is loosely fitted to the guide rod 21. It also includes a spring 22 that urges the elevating member 19 upward. Incidentally, the elevating guide rod 21 is provided upright within the frame 8 on both the left and right sides.

As shown in FIGS. 1 and 2, primary coils 23 of linear motors for bogie propulsion are arranged in two rows on the left and right in the traveling path 2, facing outward, and the primary coils 23 are arranged with a predetermined gap in between. Opposing secondary conductor plates 24 for linear motors are attached to the inner lower ends of the frames 8 on both the left and right sides of each truck 1. The primary coil 23 may be arranged so as to be continuous over the entire route, but since the trolley 1 is connected in an endless manner, for example, as shown in FIG.
The primary coil 23 can be left undisposed at the points a and the like.

In addition, each sorting in the travel route 2 is located at a position (the sorting is done at the chute 5
The primary coil 25 for a linear motor for rotationally driving each roller 12 in the roller conveyor 4 of each trolley 1 is located at the location where the roller conveyor 4 of each trolley 1 passes over. arranged to move. This primary coil 25 generates a moving magnetic field in the horizontal and right directions perpendicular to the traveling route 2, and its width (length in the traveling route 2 direction) is the same as that of the conveyor roller 2.
2, and is approximately the same length as or longer than this, and is made of a magnetic material and serves also as an operating part in the roller braking means 18.
9 is constructed so that it can face directly above the primary coil 25 near one side thereof with an appropriate distance therebetween. The primary coil 25 is installed on a pair of left and right fixed frames 26 that support the primary coil 23 of the linear motor for propulsion of the bogie.

In the sorting conveyance device configured as described above,
By energizing the primary coil 23 of the linear motor for bogie propulsion and generating a moving magnetic field in the two directions of the running route, a thrust in the running direction of the bogie acts on the secondary conductor plate 24 on each bogie 1 side, and each bogie 1 moves in a predetermined direction. The vehicle will travel along the guide rail 6 in the direction of . Therefore, each cart 1 is sorted at a specific position on the traveling route 2 by transferring the conveyed articles W onto the roller conveyor 4 and transferring the conveyed articles W to the traveling route 2.
can be conveyed along the roller conveyor 4
As shown in the right hand side of FIG.
Since the brake is applied by pressing the small-diameter braked portion 12a of each roller 12 with the urging force of do not have.

Immediately before each trolley 1 that transports the objects W reaches a preset predetermined sorting position, the sorting is carried out in a predetermined direction by the primary coil 25 of the conveyor drive linear motor disposed at the position. By energizing so that a moving magnetic field is generated, when the trolley 1 reaches the sorting position, the aluminum cylindrical layer (secondary four body) of each roller 12 in the roller conveyor 4 is Board) 1
4 cuts the lines of magnetic force from the primary coil 25, an eddy current flows through the aluminum cylindrical layer (secondary conductor plate) 14, and an electromagnetic force is generated that corresponds to the moving direction of the moving magnetic field. This M
Aluminum cylindrical layer (secondary 4-body plate) due to If force
14 is applied with torque, and the roller 12 rotates in a predetermined direction. At this time, a ferromagnetic iron cylinder 13 is present inside the aluminum cylinder N (secondary conductor plate) 14 of the roller 12, and a permanent magnet 15 is built inside the iron cylinder 13. , the n-force lines from the primary coil 25 are strongly attracted to the side where the iron cylinder 13 is located, and compared to the case where the iron cylinder 13 and the permanent magnet 15 are not present, the aluminum cylinder layer (secondary body plate) 1
The number of magnetic field lines penetrating 4 increases significantly. Therefore, the electromagnetic force acting on the aluminum cylindrical layer (secondary conductor plate) 14 also increases, and the force acting on the roller 12 increases! Lek gets bigger.

On the other hand, since the elevating member (made of magnetic material) 19 which also serves as the operation part of the roller braking means 18 faces the primary coil 25, an electromagnetic force acts on the elevating member 19 on the primary coil 25 side (downward). Due to the electromagnetic force, the elevating member 19 moves downward against the biasing force of the spring 22 as shown on the left side of FIG. That is, the braking action on each roller 12 is released. Lifting member 1 that moves downward
9 is stopped at a height where it does not come into contact with the primary coil 25 by a stopper (not shown).

When the trolley 1 reaches the predetermined sorting position where the primary coil 25 is energized as described above, the braking of each roller 12 on the roller conveyor 4 of the trolley 1 is released and each roller 12 is moved to the predetermined position. By rotating in the direction, the conveyed objects W on the roller conveyor 4 are carried out in a predetermined direction, either left or right, and the sorted objects are discharged onto the chute 5. Note that by switching the direction of movement of the moving magnetic field generated by the primary coil 25, the direction of rotation of the roller 12, that is, the direction of conveyance of the object W can be changed.

When the moving cart 1 leaves the energized primary coil 25, the rotational drive of each roller 12 of the roller conveyor 4 is automatically stopped, and the elevating member 19 of the roller braking means 18 is moved upward by the biasing force of the spring 22. Each braking shoe 20 is connected to the small-diameter braked portion 12a of each roller 12.
The rollers 12 are in pressure contact with each other, and each roller 12 is braked.

Note that the propulsion means for the trolley 1 is not limited to the linear motor type shown in the embodiment. Furthermore, although a roller conveyor is used as an example of a conveyor for sorting, it is also possible to use a roller conveyor or the like. In this case, each slat plate may also serve as the secondary conductor of the linear motor, or the slats may be temporarily attached with a secondary conductor plate. In any case, the secondary conductor of the linear motor provided on the rotating body of the conveyor may be made of aluminum as in the embodiment, or may be made of copper or the like. Furthermore, the structure of the braking means for braking the conveyor is not limited to that of the above embodiment.

For example, as shown in FIG. 6, a vertically movable member 28 made of a magnetic material and also serving as an operating section is provided with a braking shoe 27 at its free end that can freely come into contact with and separate from the small-diameter braked portion 12a of the roller 12.
is rotatably supported on the conveyor frame 11 by a fixed support shaft 29, and a spring 30 is provided that biases the vertically movable member 28 upward, and when the primary coil 25 attracts the vertically movable member 28, the braking shoe 27 is activated. It can also be configured to be spaced apart from the small diameter braked portion 12a of the roller 12. In this case, the vertically movable member 28 can be divided for each roller 12 and arranged in parallel, or it can be a long vertically movable member 28 provided with a plurality of braking shoes 27 corresponding to all the rollers 12. You can also do that.

(Effects of the Invention) As described above, according to the sorting and conveying device of the present invention, the sorting on the trolley is carried out when the conveyed objects are placed on the conveyor and conveyed by the running of the trolley. The rotating body of the conveyor is braked by a braking means to prevent the rotating body of the conveyor from unexpectedly falling from the top of the conveyor due to vibration or centrifugal force received when the cart runs on a horizontal U-turn section. By doing so, it can be reliably prevented and transported safely and reliably.

Moreover, the braking of the rotary body of the conveyor is performed by the electromagnetic attraction force of the primary coil when the trolley reaches a predetermined sorting position and the sorting conveyor is driven by a linear motor that has some coils on the ground side. Since the brake can be automatically released, there is no need for special means for driving the braking means, for supplying power to the means, and for braking the brake means, and it can be implemented at extremely low cost.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway plan view of the entire structure, Fig. 2 is a vertical cross-sectional front view of the main part, Fig. 3 is a partially cutaway side view of the main part, and Fig. 4 is a longitudinal cross-section showing the structure of the conveyor roller. FIG. 5 is a front view, FIG. 5 is a longitudinal side view of the same, and FIG. 6 is a side view of essential parts showing a modification of the braking means. 1... Trolley, 2... Travel route, 4... Roller conveyor for sorting, 5... Chute for sorting, 6...
Guide rail, 12...Conveyor roller, 13.
... Iron cylindrical body, 14 ... Aluminum cylinder layer (secondary conductor plate), 18 ... Braking means, 19 ... Lifting member that also serves as operation section, 20. 27 ... Braking shoe, 22. 3
0...Spring, 23...Part of the coil of the linear motor for bogie propulsion, 24...Secondary conductor plate, 25...
Part of the coil of the linear motor for driving the roller conveyor, 28... A vertically movable member that also serves as the operating section. Figure 5 J

Claims (1)

[Claims] A sorting conveyor is installed on each traveling trolley that travels in a connected manner on a fixed traveling route to carry the goods in the left and right directions with respect to the traveling direction, and a secondary conductor for a linear motor is provided on the rotary body of this conveyor. In addition, a primary coil for a linear motor for rotationally driving the rotary body of the conveyor is disposed at each sorting position set in the constant traveling route, and a braking means for the rotary body of the conveyor is further provided, and the braking means is provided with a spring that biases the brake to a braking state and an operating portion that opposes a part of the primary coil and releases the brake against the spring; A linear motor-driven sorting conveyance device configured such that when a primary coil is applied, the operating section is attracted and driven by the electromagnetic attraction force of the primary coil, and the braking means is released.