JPH0439221Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a device for preventing rear-end collisions between works conveyed by a free flow conveyor.

(Prior Art) Conventionally, workpieces have been sequentially conveyed in free flow using a pair of left and right corrotops. In this case, the workpiece is carried on a workbench, and the workbench is made larger than the workpiece to prevent damage to the workpiece in the event of a rear-end collision.

(Problem that the invention aims to solve) In order to convey a large workpiece, a larger workbench is used, which increases the weight and consumes more conveyance power. The installation area is also large, which is uneconomical.

The object of the present invention is to provide a collision prevention device that can use a workpiece table that is smaller than the workpiece.

(Means for solving the problem) In order to achieve the above object, in the present invention, the workpieces placed on the workbench are sequentially free-flowed forward by means of conveyance means such as a pair of right and left rollers. In the case of a workpiece, an arm having a longitudinal direction in the transporting direction and having a length longer than the total length of the workpiece is placed between the pair of left and right transport means, and is able to swing vertically in a balanced manner such that it tilts upward in the free state. A protrusion is provided at the front end of the arm that protrudes above the conveyance surface of the work table and is pushed down by the work table, and at the rear end of the arm, the rear end is moved upward by pressing down of the protrusion. A stopper is formed to protrude above the conveyance surface to stop the conveyance of the subsequent workpiece table, and the length of the workpiece table in the conveyance direction is made shorter than the total length of the workpiece.

(Function) When the conveyance means such as Corotoputien travels,
The work table on which the work is placed moves forward in a free flow state along the conveyance path one by one.
When the protrusion at the front end of the swingable arm provided between the pair of conveyance means is pushed down by the moving work table, the stopper at the rear end of the arm is raised above the conveyance surface, and the subsequent work table is pushed down. When the workpiece approaches, the following workpiece is held down by the stopper, and since the length of the arm is longer than the total length of the workpiece, the workpiece on the following workpiece collides with the workpiece on the preceding workpiece. Never.

When the preceding work table moves in front of the arm, the arm becomes free and returns to the forward upward position, the stopper sinks below the conveyance surface, and the forward movement of the following work table, which was stopped by the stopper, is stopped. This is allowed, and the front end of the arm is pushed down again as the arm moves forward, and the stopper stops the work table following this work table from approaching.

As mentioned above, even if a small work table whose length in the transport direction is shorter than the total length of the workpiece is used, the arm can stop the following workpiece table before the workpiece collides with the workpiece, and the use of a small workpiece table As a result, power consumption can be reduced, and the length of the conveyance path and installation area can be reduced.

Further, the arm has a relatively simple seesaw-like configuration, and its operation is performed by the work table, and no special power source is required, so that manufacturing and operating costs can be kept low.

(Example) To explain the example of the present invention with reference to the drawings, the first example is as follows.
In the figure and Figure 2, 1 is the left and right 1 that moves synchronously.
A conveying means constituted by a pair of endless corrotobuttons, 2 is a workpiece to be transferred by the conveying means 1, 3 is a work platform on which the workpiece 2 is placed and moved on the conveying means 1, and the work platform 3 is the conveying means. The rollers of the means 1 transport it forward in a free flow that can be stopped and moved freely. The work table 3 is smaller than the work 2,
If the works 2 collide with each other during conveyance, there is a possibility that they will be damaged, but this collision is prevented by a seesaw-like vertically swingable arm 4 provided on the conveyance path between the conveyance means 1. The arm 4 is composed of a member whose middle part is supported by a support shaft 5 and which is longer than the workpiece 2 in the conveying direction, and its front 4a is supported by a rear 4b.
In the natural state, it is lighter than the front 4
A is positioned above and rear 4b is positioned below. Further, a protrusion 6 is provided at the front 4a of the arm 4, and when the front 4a is swung upward, the protrusion 6 protrudes above the conveying surface 7, and the conveying means 1
It was made so that it could be pushed down by the work table 3 that was being transferred by.

The rear part 4b of the arm 4 is formed longer than the front part 4a, and a stopper 8 is provided at the rear end. The front end of the incoming work table 3 is stopped so that the conveyance of the work 2 can be stopped.

Reference numeral 9 denotes a fixing table for the arm 4 provided between the conveying means 1, and 10 denotes a bearing for the support shaft 5 attached to the fixing table 9, an exploded perspective view of which is shown in FIG.

In the one shown in the first figure, when the work table 3 on which the work 2 is placed is sent to the front 4a of the arm 4 by the conveying means 1, the work table 3 pushes down the protrusion 6, so that the arm 4 The rear part 4b is the conveyance surface 7
The stopper 8 at the rear part 4b stops the front end of the work table 3 that ascends above the table and is sent next, thereby preventing the works 2 from colliding with each other.

As shown in FIG. 4, the arms 4 are arranged between the conveying means 1 in a staggered manner, and as shown in FIG.
If the workpieces 2 in front and behind are positioned left and right differently, many workpieces 2 can be transported at the same time while avoiding collisions between them, improving efficiency.

(Effects of the invention) As described above, in the present invention, an arm is provided between the free-flow conveyance means, which can swing vertically by means of a work table, and the front and rear sides of the arm are made to alternately protrude above the conveyance surface, and the arm formed at the rear of the The stopper stops the conveyance of the following work table and prevents the work on the following work table from colliding with the work on the preceding work table, so there is no need for a special drive source to drive the arm, and it is smaller than the work. It is economical because a work table can be used and the power consumed for transportation can be reduced.
The conveyor can be shortened and the installation area can be reduced, the arm configuration is simple and can be manufactured at low cost, and works can be conveyed at high density while preventing rear-end collisions.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is an exploded perspective view of the arm, and FIG. 4 is a perspective view of another embodiment of the present invention. 5
The figure is a schematic plan view thereof. DESCRIPTION OF SYMBOLS 1...Transportation means, 2...Workpiece, 3...Work table, 4...Arm, 4a...Front, 4b...Backward, 6...Protrusion, 7...Transportation surface, 8...Stopper.

Claims (1)

[Scope of utility model registration request] In a system in which a pair of left and right conveyance means such as corrotops are used to allow the workpieces placed on a work table to flow forward in sequence, there is a An arm whose length is equal to or longer than the total length of the workpiece is provided so that it can swing vertically with a balance such that it tilts upward in the free state, and the front end of the arm protrudes above the conveyance surface of the workpiece table to form a workpiece table. A stopper is formed at the rear end of the arm to protrude above the conveyance surface and stop the conveyance of the subsequent work table when the rear end moves upward due to the depression of the protrusion. A collision prevention device for a free flow conveyor, characterized in that the length of the work table in the conveyance direction is shorter than the total length of the work.