JPH05229628A - Transfer device - Google Patents

Abstract

PURPOSE:To reduce an impact at the time of stoppage, eliminate a vibration due to friction between a travel rail and a pallet, and prevent parts from being loosened or falling by providing a transfer device body with a floating device and a decelerating device. CONSTITUTION:When a pallet 1 placed on travel rails 3 advances toward a stopper 2, a pneumatic floating device 70 starts to operate and blows the air from a floating nozzle 70a. As a result, the pallet 1 is subjected to a floating force, and a contact force acting between the pallet 1 and the rails 3 is alleviated. Concurrently, a pneumatic decelerating device 80 also starts to operate and blows the air from an air nozzle 80a in a direction opposite to a pallet travel direction. Thus, the pallet 1 undergoes a floating force and an air flow in a direction opposite to a travel direction, thereby being decelerated. During the foregoing process, a stopper elevating device 6 operates and a stopper 2 rises. The pallet 1 under floating and braking forces, therefore, collides with the stopper 2 and comes to a stop.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor for driving a pallet in a linear direction.

[0002]

2. Description of the Related Art In a conventional mass production system, an unattended production is attempted by a belt conveyor system for transporting goods through an automatic device such as a robot. This type of conveyor system using a conveyor belt conveys the goods on which the goods are carried and is used for automated work flow.
When the substance on the carrier is transported to a required place, the substance is stopped at a predetermined position, automated by a robot or the like, and repeatedly transported to the next predetermined position.

A conventional conveying device will be described below with reference to the drawings. 5 (a) and 5 (b) are a plan view and a side view showing an external appearance of a conventional transport device. The transport belt 3 on a roller 5 attached to the transport device 4 is driven to drive the belt 3
The pallet 1 placed at is transported. Although not shown, various semi-finished products to be processed are placed on the pallet 1. When the pallet 1 approaches the vicinity of the stop position, the stopper elevating device 6 starts to operate and raises the stopper 2,
A conveying device that stops the pallet 1 at a predetermined position is configured. The semi-finished product placed on the pallet 1 stopped at a predetermined position is worked by a robot (not shown), the stopper 2 is removed after the work is finished, and the pallet 1 is again transported to the next stop position by the transport rail.

[0004]

However, the conventional conveying device has a drawback that parts on the pallet come off or fall due to the impact because the pallet collides with the stopper to stop the pallet. Further, there is a drawback in that the transport speed cannot be increased because the impact becomes stronger when the transport speed is increased. There was a growing demand for the development of a transport device that has faster transport speeds and does not come off parts.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a carrier device having a completely different stopping device for applying braking after weakening the contact force between a pallet and a rail, as compared with the conventional carrier device. It is in.

[0006]

SUMMARY OF THE INVENTION To achieve the above object, the present invention is directed to a carrier rail and a pallet by a levitation device that applies a buoyant force that opposes gravity from the bottom of the pallet, and a speed reducer that brakes from the side of the pallet. It is characterized by weakening the contact force between them, braking the pallet to decelerate it, and weakening the impact when the pallet collides with the stopper of the transfer device.

[0007]

That is, since the transfer device according to the present invention is provided with the levitation device and the speed reducer in addition to the stop device, not only the parts are not detached or dropped from the pallet during the deceleration impact stop, but also the transfer speed is reduced. It is a highly-used transport device that can speed up transportation.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings.
FIG. 1A is a plan view showing the first embodiment. Figure 1
FIG. 1B is a side view with the pneumatic speed reducer of FIG. 1A removed. Similar to the conventional example, 1 is a pallet, and the pallet 1 is transported by the transport rail 3 to the stopper 2 on the transport main body 4 constituted by the transport rail 3 and the rollers 5 in the direction from left to right in the figure. According to the present invention, the pneumatic levitation device 7 is provided at the lower portion of the transport main body 4 of the conventional example, in the front portion of the stopper 2, that is, at the stop position of the pallet 1. Further, pneumatic deceleration devices 80 for ejecting an air flow on the side surfaces of the pallet 1 are provided on both side surfaces of the carrier body 4.

A pallet 1 placed on a transport rail 3
However, when it advances toward the stopper 2, the pneumatic levitation device 70 is started and the air flow is started from the levitation nozzle 70a that blows out air in the direction of the arrow in FIG. 1 (a).
Therefore, the pallet 1 receives the buoyancy from the bottom, and the transport rail 3
Relieves the contact force that acts between and. Pneumatic levitation device 7
At the same time when 0 is started, the pneumatic reduction device 80 is also started, and the air flow from the air blowing nozzle 80a is as shown in FIG.
Is ejected in the direction of the arrow, that is, in the direction opposite to the traveling direction. In this way, the pallet 1 is given a floating force and a force in the direction opposite to the traveling direction by the airflow, and is decelerated. During that time, the stopper elevating device 6 operates and the stopper rises. The pallet 1 receiving the levitation force and the braking force collides with the raised stopper 2 and stops. The semi-finished product placed on the pallet 1 is worked by a robot (not shown), and when the work is completed, the operation of the levitation device 70, the speed reducer 80 and the stopper 2 is released, and the pallet 1 is again stopped by the transport rail 3. It is transported to the position.

Next, the second embodiment of the present invention will be described in detail. Figure 2
FIG. 4 is a side view showing a pallet floating device using electromagnetic force. In the following description, the description of the same parts and the same numbers shown in the conventional example is omitted to avoid duplication. In this embodiment, an electromagnetic levitation device 71 is provided in the lower portion of the transport main body 4 of the conventional example, in front of the stopper 2, that is, at a predetermined stop position. Further, a magnetic pole portion 1a is provided on the back surface of the pallet 1.
When the pallet 1 arrives in the vicinity of a predetermined stop position, a current flows through the electromagnetic levitation device 71, which has the same polarity as the magnetic pole portion 1a of the pallet 1.

The pallet 1 placed on the transport rail 3
However, when the pallet 1 moves toward the stopper 2, the electromagnetic force type levitation device 71 starts and the pallet 1 receives a repulsive force due to the magnetic force generated from the levitation device 71, and the contact between the transfer rail 3 and the pallet 1 is exerted. Relieve your power.

Next, the third embodiment of the present invention will be described in detail. Figure 3
Is a roller type speed reducer 81 using a rubber roller. In this embodiment, a roller type speed reducer 81 is provided on the side of the transport main body 4 of the conventional example and in front of the stopper 2, that is, at the stop position. Link 8 of roller type speed reducer 81
1c is rotatably supported by a link mounting shaft 81d fixed to the transport body 4 at substantially the center thereof. A rubber roller 81b is attached to the tip of the link 81c, and the deceleration roller spring 81 is attached to the other end and the conveyance body 4.
The rubber roller 81b is pressed against the side surface of the pallet 1 by causing the spring to work by a.

When the pallet 1 enters the position where the roller decelerator 81 is installed, the roller type speed reducer 81 contacts the rubber rollers 81b on both sides of the pallet 1 to reduce the speed. During that time, similarly to the conventional example, the stopper lifting device 6 is started and the stopper 2 is lifted to stop the pallet 1.

Next, a fourth embodiment of the present invention will be described in detail. Figure 4
[FIG. 3] is a side view of a carrying device having a configuration in which a levitation device unit and a speed reduction device unit are integrated. Similarly to the conventional example, 1 is a pallet, and the pallet 1 is stopped by the transfer rail 3 on the transfer main body 4 constituted by the transfer rail 3 and the rollers 5.
Be transported to. In the present invention, a mechanical levitation device 72 with a deceleration function is provided at the front portion of the stopper 2, that is, at the stop position, below the transport main body 4 of the conventional example.

The levitation device 72 with a deceleration function includes a lever 92.
And a pneumatic carrying pneumatic levitation device 90 that pushes it up. The lever 92 having an arcuate elasticity is rotatably supported by a shaft 93 fixed to the carrier body 4 and attached so as to come into contact with the carrier rail 3. The piston 91 of the pneumatic levitation device 90 presses the tip of the lever 92, and the tip of the lever is always in the state where the pallet 1 is in the advancing state.
Slightly protruding from the upper surface. When the pallet 1 placed on the feed rail 3 advances toward the stopper 2, the tip of the lever 92 starts contacting the bottom surface of the pallet 1, and the contact surface expands due to the elasticity of the lever 92 itself. Then, the contact surface becomes flush with the upper surface of the transport rail by appropriate air pressure. At the same time that the contact force acting between the pallet 1 and the transport rail 3 is softened, the pallet is decelerated and the pallet is stopped at a predetermined stop position by the stopper 2 as in the conventional example.

[0016]

As described above, according to the present invention, the stopper raising / lowering device, the levitation device for applying the levitation force to the lower part of the pallet, and the speed reducer for exerting the braking force on the pallet are provided near the stop position of the transport main body. As a result, when the pallet enters the vicinity of the stop position, the lower part of the pallet first receives the levitation force of the levitation device to weaken the pressing force of the pallet applied to the transfer rail and at the same time to reduce the contact frictional force between the pallet and the transfer rail. After the pallet enters the stop position, the speed reducer is activated to apply a braking force to the side part or the lower part of the pallet, and the pallet starts decelerating. During that time, the pallet with weak contact friction increases deceleration with less vibration and dance on the transport rail, and stops extremely quietly with the stopper. Therefore, it becomes possible to carry the articles stored in the pallet without jumping out or moving to an illegal position. In addition, it is possible to increase the transfer speed in a range where there is no popping out of the product, and it is possible to provide a transfer device with extremely high productivity that does not stop the transfer rail and interrupt the production.

[Brief description of drawings]

FIG. 1A is a side view of a main part of the transfer device of FIG. 1A, which shows a transfer device having a levitation device and a speed reducer according to a first embodiment of the present invention.

FIG. 2 is a side view of a carrying device having a levitation device according to a second embodiment of the present invention.

FIG. 3 is a top view of the transport device of the speed reducer showing the third embodiment of the present invention.

FIG. 4 is a side view of a transportation device having a levitation function with a deceleration function according to a fourth embodiment of the present invention.

FIG. 5A is a top view of a conventional transfer device.
(B) is a side view of (a).

[Explanation of symbols]

 1 Pallet 2 Stopper 3 Conveyor rail 4 Conveyor body 5 Roller 6 Stopper lifting device 70 Pneumatic levitation device 71 Electromagnetic levitation device 72 Floating device with deceleration function 80 Pneumatic decelerator 81 Roller decelerator 90 Pneumatic levitation device

Claims (6)

[Claims] 1. A transport device in which a transport platform is driven linearly and stopped at a fixed position by a stopper, and a force that opposes gravity is applied to the lower part of the transport platform near the stop position, and the transport platform is stopped by a speed reducer. A transport device that is characterized by: 2. The conveying device according to claim 1, wherein the force that opposes gravity acting near the stop position is given by pneumatic pressure. 3. The transfer device according to claim 1, wherein the force that opposes gravity acting near the stop position is given by a magnetic force generated by an electromagnetic coil. 4. The force according to claim 1, which opposes gravity acting near the stop position, is provided by pneumatically raising a lever having an elastic member that contacts the lower surface of the carrier. apparatus. 5. The transfer device according to claim 2, wherein the speed reducer applies a braking force by bringing a roller urged by an elastic member into contact with both sides of the transfer table. 6. The carrier device according to claim 2, wherein the speed reducer applies air pressure to both side surfaces of the carrier table in a direction opposite to the traveling direction of the carrier table.