JPH0124103B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a conveyor device equipped with a truck that can freely run on rails via wheels, and includes a magnet provided on the truck and a conveyor device that rotates at a fixed position. By magnetically coupling the drive shaft with the drive shaft, the bogie can be driven to travel, and the bogie can stop or stagnate at any position without stopping the drive shaft or causing mechanical wear. The purpose is to provide a conveyor device that is possible.

In conventional conveyor devices, the cart and the drive source outside the cart are mechanically coupled and in contact with each other, so the cart, which is engaged with and travels with the drive source, can be stopped at any position while the drive source is driven. When it is necessary to stop or hold the cart, mechanical sliding wear occurs at the mechanical connection and contact parts between the cart and the drive source, resulting in large mechanical and power losses and shortening the lifespan of the worn parts. It had shortcomings such as being short and requiring replacement. To overcome this drawback,
For example, a truck driving device as shown in FIGS. 7 and 8 has been devised. In this invention, a bogie 53 that runs on rails 51 via wheels 52
A drive device 54 is provided at. The drive device 5
4 is provided with driving wheels 56, 57 which are brought into contact with each other by a spring 55 so as not to rotate, and the driving wheels 56, 57 are connected to a conveyor belt 58 running together by means of springs 59, 5.
9, the truck 53 moves as the conveyor belt 58 runs, but when the truck 53 is stopped by the stopper, the drive wheels 56 and 57 overcome the biasing force of the spring 55 and move to the contact position. Since the drive wheels 56 and 57 are separated from the conveyor belt 58 and rotated freely by the conveyor belt 58, no mechanical loss occurs, and the above-mentioned drawbacks of the conventional system are skillfully solved by the mechanical structure. be.

The present invention solves the above-mentioned drawbacks by using a magnetic structure, and the structure will be explained below with reference to embodiments shown in the drawings.

In the first embodiment shown in FIGS. 1 and 2, a rail 2 is fixed on a base 1, and the rail 2 is
A cart 4 is placed on top via wheels 3 so as to be freely movable. Further, a drive shaft 6 is rotatably installed on the base 1, parallel to the rail 2, via a bearing 5. On the lower surface of the truck 4, there is a
A magnet nut portion 8 in which a spiral nut magnet 7 is housed is provided on the inner surface of a partially cut-out cylindrical inner cavity 9 that is bored in the traveling direction of the magnet.

As shown in FIGS. 4 to 6, the drive shaft 6 is fitted into the inner cavity 9 at a position concentric with the inner cavity 9. As shown in FIGS. On the side surface of the drive shaft 6, magnets 10, 10 are alternately protruded with a phase difference of 180 degrees and at equal intervals of a half pitch P, and the drive shaft 6 is provided with gears 11, 12.
It is rotationally driven by an electric motor 13 via. The inner bore 9 of the magnet nut portion 8 and the nut magnet 7 have an inner diameter that allows the bogie 4 to pass through the bearing 5 and gear 11 without coming into contact with them while the truck 4 is running, and an opening 14 is cut out at the lower end. . The magnet 10 is protruded from the drive shaft 6 so as to be as close to the nut magnet 7 as possible without coming into contact with the nut magnet 7. The nut magnet 7 has a half pitch P, which is the same as the half pitch of the magnet 10, and the nut magnet 7 and the magnet 10 have polarities that are attracted to each other.

In addition, for work safety and protection of the conveyor equipment, cover frames 15, 1 are provided on both sides of the base 1.
5 is preferably provided. Also, Figures 1 to 3
When the upper surface of the rail 2 is flat, the guide roller 16 shown in the figure plays a role of rotating and guiding the wheel 3 while contacting the side surface of the rail 2 so that the wheel 3 does not deviate from the rail 2.

Next, the functions and effects of the conveyor device of the present invention will be described.

As mentioned above, Natsuto Magnet 7 is Pitch 2P.
Since it is provided in a spiral shape, the drive shaft 6
When rotated, the rotating magnet 10
Since one of the nut magnets 7 and the nut magnet 7 are attracted to each other, the nut magnet 7 follows the magnet 10 while moving in the axial direction, and as a result, the truck 4 moves forward and backward according to the rotational direction of the drive shaft 6.

As shown in FIG. 4, the magnet 10 is
When the nut part 8 rotates 90 degrees in the direction, the nut magnet 7 is attracted, so P ₁ = 1/
Move in the direction of arrow A by a distance of 2P. When the magnet 10 rotates in the direction opposite to arrow C, the magnet nut portion 8 moves in the direction opposite to arrow A. When the magnet nut portion moves by P, the nut magnet 7 is also attracted to the adjacent magnet 10. Therefore, as the drive shaft 6 rotates, the magnet nut portions 8 are successively attracted to the adjacent magnets 10, so that the truck 4 continuously moves on the rail 2 in the axial direction.

When the trolley 4 is stopped by a separately provided stopper (not shown) while the trolley 4 is running and is left there for a certain period of time, even if the drive shaft 6 continues to rotate, the trolley 4 and the drive shaft 6 Since there is no mechanical joint or contact between the two, there is no mechanical wear, and once the stopper of the truck 4 is released, the drive shaft 6 continues to rotate.
The trolley 4 can start traveling again without encountering any other resistance.

As shown in FIG. 1, when two magnetic nut parts 8 are provided on the truck 4 at an appropriate distance, that is, at a distance that is a multiple of the pitch 2P, from one drive shaft 6 to the adjacent drive shaft. When transferring between the drive shafts 6, at least one of the magnetic nut portions 8 applies a force for advancing the truck 4, so that the transfer between the drive shafts 6 is performed smoothly.

The magnet 10 may be an electromagnet.

Next, the second embodiment shown in FIGS. 9 to 11 is as follows.
A spiral nut magnet 19 is installed in the inner cavity 18 at the center of the magnet nut part 17, and the wheels 20, 20 are attached directly to the magnet nut part 17.
is installed and can run on the rail 21,
The drive shaft 23, on which magnets 22 are protruded at equal intervals, has bearings 24, 24 in the center of the rails 21 on both sides.
It is rotatably supported on the base 25 via.
As shown in FIG. 11, the bearing 24 is configured to be narrower than the opening 26 of the inner cavity 18, so that the magnetic nut portion 17 can pass through the bearing 24 without any problem.

The magnet 22 is embedded and screwed into the stepped shaft-shaped drive shaft 23 as shown in FIG. The height of the protrusion from the side surface of the shaft 23 can be adjusted to form a gap with the nut magnet 19.

In the third embodiment shown in FIGS. 12 to 14,
Bogie 2 running on rails 27 via wheels 37
A drive shaft 29 is provided on the outside of the truck 8, and a magnetic nut portion 30 that magnetically engages with the drive shaft 29 is also supported on the outside of the truck 28 via a bracket 31.

In this embodiment, when the cart 28 stops or stays, the magnet nut section 30 is rotated to increase the gap between the spiral nut magnet 32 and a magnet (not shown) protruding from the drive shaft 29. A rotating device 33 for the magnet nut portion 30 is provided, thereby drastically reducing the magnetic coupling force between the nut magnet 32 and the magnet.

As shown in FIGS. 13 and 14, the rotation device 3
3 is a magnet nut portion 3 rotatably supported by a bracket 31 via a rotation support shaft 34;
0, consists of an arm 35 that is fixed to the rotation support shaft 34 of the magnet nut part 30 and protrudes outward, a return spring 36, and a roller 39 that is rotatably protruded from the tip of the arm 35, as shown in the figure. When the magnetic nut portions 30 are provided at two locations as shown in FIG.

As shown in FIG. 12, the rollers 39 are provided at a position where they abut against a dog 40 protruding from the side surface of the preceding truck 28a, a stopper (not shown), or the like. Dolly 28a preceded by dolly 28
Since the roller 39 abuts the dog 40 at the position where it abuts the dog 40, the arm 35 and roller 39 are rotated backward to the positions 35a and 39a, respectively, as shown in FIG. As a result, the gap between the magnet of the drive shaft 29 and the nut magnet 32 becomes extremely large, and the magnetic coupling force is drastically reduced. Trolley 28
The same applies when the stopper comes into contact with the stopper.

By providing the above-described rotation device 33, even if the truck 28 is forced to stop or stay while the drive shaft 29 continues to rotate while the truck 28 is traveling, the truck 28 can be moved to the stopper that stops the truck 28. This helps reduce line pressure.
When the truck 28a starts traveling again or the stopper is removed, the contact between the hanger 39 and the dog 40 is released, and the rotating device 33 including the magnet nut part 30 is released.
The whole is returned to the old position by the return biasing force of the return spring 36, the magnetic coupling force between the nut magnet 32 and the magnet is restored, and the drive shaft 29
Since the carriage 28 continues to rotate, the carriage 28 resumes running. The wheels 37 rolling on the rails 27 are guided by guide rollers 41, 41 so that they always remain on the rails 27.

The drive shaft 29 is driven by a prime mover, and the gears 11, 1
2.

In addition, FIG. 12 and FIG. 13 show a magnetic brake device 42 that more reliably stops the cart 28.
is shown, and the illustrated position shows the brake operating position where the brake magnet 43 substantially contacts the rail 27. The magnetic brake device 42 includes a brake arm 45 rotatably attached to the truck 28 via a support shaft 44, a roller 46 provided at the tip of the arm 45, and a pin at the rear end of the arm 45. Brake stand 4 supported via 47
8. The brake magnet 43 provided on the brake stand 48 and the brake magnet 43
It is constituted by rollers 49, 49 which are provided so as not to come into sliding contact with the rail 27 with a slight gap when the rail 27 approaches the rail 27.

In the magnetic brake device 42, a brake magnet 43 is always urged in a direction away from the rail 27 by a spring (not shown), and when the bogie 28 stops or stays, a brake dog 50 protruding from the preceding bogie 28a etc. The brake magnet 43 and the rail 27 are brought into contact with each other, and the brake arm 45 is rotated in the direction in which the brake magnet 43 approaches the rail 27.
It performs a braking action by utilizing the magnetic attraction force generated between the vehicle and the vehicle. Due to the resumption of running of the preceding bogie 28a, the brake dog 50 and 4
6 are separated from each other, the brake magnet 43 is separated from the rail 27 due to the biasing force of the spring, and the braking action is eliminated, allowing the truck 27 to travel.

In the fourth embodiment shown in FIGS. 15 and 16, the structure in which a drive shaft 29 is provided on the outside of a truck 28 that runs on rails 27 via wheels 37 is the same as in the previous embodiment. However, a magnetic nut portion 60 that magnetically engages with the drive shaft 29 is fixed to the outside of the truck 28 via a bracket 61.

In this embodiment, a cart 28 traveling at high speed is used.
A configuration is shown in which a linear motor 62 is provided outside the magnet nut portion 60 for decelerating the motor near a predetermined stop position. In this case, the thrust of the linear motor 62 must be greater than the drive coupling force between the drive shaft 29 and the nut magnet 63.
By providing the linear motor 62, the trolley 28 traveling near the stop position is decelerated and stopped by the stopper, and after the required work is completed, the stopper is disengaged and the linear motor 62 accelerates the trolley. It is also possible to run it at high speed. It is also possible to decelerate the carriage 28, stop it at a predetermined position, and position it using only the linear motor 62 without using the stopper.

As another example, when the stop position is fixed, a separately driven drive shaft is installed only near the stop position, and a variable speed electric motor is used as the prime mover of the drive shaft. It is also possible to decelerate, stop, restart and accelerate the truck.

In the fifth embodiment shown in FIG. 17 to FIG. The configuration is similar to the first embodiment.

In this embodiment, a protrusion 67 made of a spiral magnetic material is formed on the drive shaft 66.
Magnets 69, 69 are attached to the lower surface of the truck 4 via a bracket 68, close to the protrusion 67 and at the same pitch as the protrusion 67.

Note that the drive shaft 66 is attached to a non-magnetic cover 7.
covered with 0. The cover 70 is made of a non-magnetic material such as plastic, and covers the drive shaft 70.
The drive shaft 70 is covered with the drive shaft 70 and fixed to the base 1 between the drive shaft 70 and the magnet 69 so as not to touch the drive shaft 70 and the magnet 69.

By having the above-mentioned configuration, the drive shaft 66
When it is rotated by the electric motor 13 via the gears 11 and 12, as the protrusion 67, which is a magnetic material, rotates, the magnet 69 is attracted toward the rail 2 by the magnetic force between it and the magnet 69, and as a result, the truck 4 moves forward and backward. I am forced to do it.

The protrusion 67 can be obtained by cutting the drive shaft 66, which is a magnetic material, to form a spiral groove, or by attaching a separately formed protrusion 67 to the circumferential side of the drive shaft 66. It is formed.

Since the rotating drive shaft 66, gears 11, 12, etc. are covered by the cover 70, the drive shaft 66, etc. are prevented from becoming dirty, and the safety of the workers is maintained.

The present invention has the structure described in the claims, and includes magnets protruding from the lower surface of a self-moving truck at fixed pitches in the running direction of the truck, and magnets having the same pitch as the magnets. A drive shaft with a magnetic material protruding from its side is installed close to the magnet of the cart, and by utilizing the magnetic attraction between the drive shaft and the magnet, the cart can be used as the drive shaft. Because it can be driven and driven without any mechanical connection or contact,
There is no mechanical wear between the drive shaft and the cart, the running noise of the cart is low, and there is no mechanical wear, so the conveyor device is highly durable and requires no parts replacement. There is no need for maintenance work, and since the attraction force is generated in the gap between the magnet and the nut magnet, the attraction force will not decrease even if oil etc. adheres to various parts of the truck or drive shaft, and the magnetic attraction force can be maintained. By appropriately selecting the line pressure applied to the stopper by the truck when the truck stops or stays, it is possible to reduce the line pressure applied to the stopper, and the number of component parts can be reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the overall arrangement of the first embodiment, FIG. 2 is a side view of the same, and FIG. 3 is a top view of the first embodiment.
FIG. 4 is a partially enlarged plan view showing the engaged state of the drive shaft and the magnetic nut; FIG. 5 is an enlarged line sectional view;
6 is a sectional view taken along the line in FIG. 5, FIG. 7 is a partially sectional side view of the conventional example, FIG. A plan view of the embodiment, FIG. 10 is a side view of the same as above, FIG. 11 is a front view of the same in the running direction, FIG. 12 is a plan view showing the overall arrangement of the third embodiment, and FIG. 13 is a partially enlarged plan view of the same as above. , Fig. 14 is an enlarged front view of the same part, Fig. 1
5 is a plan view of the fourth embodiment, FIG. 16 is a front view of the same, FIG. 17 is a plan view showing the overall arrangement of the fifth embodiment, FIG. 18 is a side view of the same, and FIG. 1
Figure 7 is an enlarged sectional view taken along the line in Figure 20, Figure 20 is a partially enlarged side view in cross section showing the engagement state of the drive shaft and magnet, and Figure 21 is a partially enlarged side view shown in Figure 20.
It is a sectional view taken along the line XI-XI. 1, 25: Base, 2, 21, 27: Rail,
3, 20, 37: Wheels, 4, 28: Trolley, 6, 2
3, 29, 66: Drive shaft, 7, 19, 32, 6
3: Natsuto Magnet, 8, 17, 30, 60:
Magnet nut part, 9, 18: Trolley, 10, 2
2: Magnet, 67: Protrusion, 69: Magnet.

Claims (1)

[Claims] 1. Magnets are provided protruding from the underside of a trolley that is movable via wheels on rails fixed to a base at fixed pitches in the running direction of the trolley,
Further, a drive shaft having a magnetic body protruding from the side surface at the same pitch as the magnet is rotatably supported on a base parallel to the rail in close proximity to the magnet of the truck, and is connected to the magnet of the truck. A conveyor device characterized in that at least one of the drive shaft and the magnetic material is formed in a spiral shape, and the cart and the drive shaft are magnetically coupled.