JPH0122191B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for grouping products from a stream of stacked products, including a first belt conveyor for successively selecting the stacked products, and a belt conveyor below the discharge end of the first conveyor. It consists of a second conveyor belt arranged and conveying in the opposite direction.

Bags discharged from a bag making machine operating at high speed are placed to form a stack on a belt conveyor which normally transports the bags to be stacked. Each group of stacked bags must therefore be separated so that they can be stacked, mounted on a transport board, or otherwise combined to form a transportable unit. A number of devices are known for aligning the edges of bags and bags, in which the products separated from the stack are stacked in front of an abutment to form an edge stack. It is also known to push together products placed in a stack on a conveyor belt by a manufacturing machine to form spaced-apart stacks. In all known pile-forming devices, the pile-forming and extrusion can only take place intermittently, so that the constant flow of product from the production machine has to be temporarily stopped, and the The resulting product stream must be stacked or directed to other stack forming equipment.

In a device for stacking products to be transported in stacks, known from German Patent Publication No. 2207175, two conveyor belts running at different speeds are coupled, and during the working cycle of the device, on the one hand, a slow speed belt forming the stack is connected. The conveyor belt extends in the direction of the faster conveyor belt, while the faster conveyor belt moves to the slower conveyor belt to separate the products into groups. 2
The two conveyor belts are connected by pressure rollers. This known device is complex and uneconomical because it requires equipment for contracting and stretching the two conveyor belts in opposite directions.

In a device similar to the above-mentioned device known from German Patent Application No. 2842117, a reciprocating carriage parallel to the second belt conveyor in the stacking chain is used to hold the first product of each subsequent pile. has a catch located in the transport plane of the belt conveyor. In order to separate the products to be piled into groups, the carriage with the catch holding the first product of the next pile is moved at a slower speed in the transport direction of the second conveyor belt. This creates gaps in the flow of products that are suitable for stacking. Products following the held product are dispensed at reduced intervals corresponding to the lower carriage speed. As a result, the formation of close stacks of products is made without interfering with the formation of the next stack after release of the first product by the clasp. In this known device, a conveyor belt moving at a higher speed than the carriage is pulled out from under the products stacked on top of the products held by the clasp, so that a particularly strong frictional force is applied to the stacked products. It has the disadvantage of being generated by a conveyor belt on the rear end of the machine. This friction is acceptable if the product to be stacked is a newspaper with a folded back end on which the conveyor belt can slide. However, if the product is a thin film-like material, such as a plastic bag or tube section, known devices do not allow the friction between the stack of products and the conveyor belt to cause the product to roll up, bend, or wrinkle. cannot be used for pile formation as it increases the risk of

The present invention provides a device as described above, which is simply constructed and operates reliably, for separating products into groups made of thin or film-like material and to be stacked and transported in order to create a pile of products. The purpose is to

The structural features of the apparatus for grouping stacked and flowing products according to the first invention of the present application include a first conveyor belt that continuously conveys the products; , a second conveyor whose conveying tip moves reciprocally in the conveying direction to expand and contract; and a second conveyor belt that extends below the moving range of the conveying tip of the second conveyor belt over at least the moving range; The third belt is intermittently conveyed in the opposite direction to the conveying direction of the belt.
a fourth conveyor belt, which is disposed in front of the third conveyor belt in the conveying direction, is configured to convey in a direction perpendicular to the third conveyor belt, and conveys intermittently; The belt supplies the product to the third conveyor belt while moving its leading end forward in the conveying direction, and at this time the third conveyor belt stops conveying.

Further, the configuration of the device for grouping stacked and flowing products according to the second invention of the present application includes a first conveyor belt that continuously conveys the products;
a second conveyor belt that is configured to convey in a direction opposite to the conveyance direction of the conveyor belt and whose entire body reciprocates in the conveyance direction; a third conveyor belt, which is configured to convey at least a second conveyor belt, and which extends over a range in which at least the conveying tip of the second conveyor belt moves;
The fourth conveyor is configured to convey in a direction perpendicular to the conveyance direction of the conveyor belt, and is conveyed intermittently.
a conveyor belt, the second conveyor belt stops rotating the belt and moves in the conveying direction;
When the second conveyor belt stops moving, the second conveyor belt rotates to transfer the product 22 to the third conveyor belt.
It is to feed the conveyor belt.

In the device described in West German Patent Publication No. 1071101 for forming a pile from sheets supplied in a stack, the formation of the pile is carried out on a reciprocating table, on which the stacked sheets are placed. It has conveyor belt deflection rollers which are expanded and retracted by a chain of devices in response to the movement of the conveyor and transfer table. For stacking, the table is first moved in the transport direction of a rotating conveyor belt beneath the products arranged on it.
When the table is moved in the opposite direction to the transport direction, the stacked products fall successively onto the table, and a rotatable abutment is provided on the table for arranging the products to form a top stack. There is. The first product of the next pile is held between the upper belt and the conveyor belt. The pile thus formed is pushed off the table by a rotatable slider.

An embodiment of the first invention of the present application will be described with reference to FIGS. 1 and 2. The conveyor belt 1 feeds a stream of overlapping products 2 from the left side. conveyor belt 1
Adjacent to this is a belt 4 that can be shortened. For stretching and retracting, the conveyor belt 4 runs over rollers 5, 6 mounted in fixed positions on the frame and rollers 7, 8, 9 reciprocating in the conveying direction. The rollers 7, 8, 9 assume the leftmost position as shown in FIG. 1 and the rightmost position as shown in FIG. A conveyor belt 3 running at the same speed as the conveyor belts 1 and 4 is placed above the products 2 which are placed on top of the belts 1 and 4.

Conveyor belt 1 is below conveyor belt 4.
0, 11, 12, conveyor belt 10, 1
1 are adjacent to each other and extend parallel to the conveyors 1, 4 but convey in opposite directions. Conveyor belt 12 is adjacent to conveyor belt 11. The conveying plane of the conveyor belt 12 is arranged below the conveying plane of the conveyor belt 11, and the conveyor belt 12 is arranged below the conveying plane of the conveyor belt 11.
Transport in a direction perpendicular to 1. conveyor belt 1
There are guide plates 13 and 14 on the left and right sides above the product 2 and adjacent thereto, so that the products 2 can be stacked. The products 2 deposited onto the conveyor belts 10, 11 running by the conveyor belt 4 form a superimposed stream which is stacked onto the stationary conveyor belt 12 to form a package.

To create the stack for the next package, the rollers 7, 8, 9 are moved to the right at the speed of the belt 4, ie half the speed of the stack formation. At the same time, the belt 10 stops. Meanwhile, the products to be placed in the previous package are carried away by the conveyor belt 11. As a precautionary measure, the pressure roller 15 is adapted to press the product against the first guide roller of the conveyor belt 11. Furthermore, there is a suction cup 16 which sucks in air while the conveyor belt 10 is running and holds firmly the rear end of the first product for a new package when the belt 10 stops. When the rollers 7, 8, 9 reach their right-hand limit position, the belt 10 can be started again. As soon as the last product is stacked into a package placed on the conveyor belt 12, the conveyor belt 12 is started to make room for a new package.
The conveyor belt 4 slowly returns to its initial position on the left and the overlap distance is changed to a smaller one.

In the second embodiment of the invention shown in FIG. 3, the conveyor belt 21 conveys stacked products from left to right. These products are deposited onto a conveyor belt 23 which runs from right to left and is capable of reciprocating movement in the direction of movement of the belt. The guide rollers 24, 25 that run the conveyor belt are 24.1, 25.
It is moved to position 1.

From the conveyor belt 23, the products 22 reach a belt conveyor 26 which, like the conveyor 21, moves from left to right. Finally, the products are dumped onto a conveyor belt 27 placed at the end of the conveyor belt 26 and at right angles thereto. The conveyor 27 is stopped during stacking. To cut the product flow for repackaging, the conveyor belt 23 is stopped and
At the same time, the conveyor belt 21 moves the product to the left at a speed that conveys the product. This eliminates the stacking that occurs on conveyor belt 26. When the conveyor belt 23 reaches the left limit position, the product starts dropping onto the conveyor belt 26 again. The stack that has accumulated on the conveyor belt 27 is transferred at the same time as the conveyor belt 27 is started, and a new stack is formed in its place. While taking out the stacked items, the conveyor belt 23
is moved slowly to the right, so that the stack formation of the products on the belt 26 changes only slightly.

[Brief explanation of drawings]

FIG. 1 is a side view of a device for grouping products from a stream of products being transported in stacks; FIG. FIG. 3 is a side view of an apparatus according to an embodiment of the second invention for grouping products from a stream of stacked and transported products. 1...Conveyor belt, 2...Product, 4...Belt, 5...Roller, 6...Roller, 7...
Roller, 8...Roller, 9...Roller, 1
1... Conveyor belt, 12... Conveyor belt, 16... Suction cup.

Claims (1)

[Scope of Claims] 1. A first conveyor belt 1 that continuously conveys the product 2; A conveyor belt 1 that is disposed in front of the first conveyor belt 1 in the conveyance direction, and whose conveyance tip 9 reciprocates in the conveyance direction to expand and contract. a second conveyor belt 4; a second conveyor belt 4 extending below and at least over the movement range of the conveying tip 9 of the second conveyor belt 4; a third conveyor belt 10 that conveys intermittently; and a fourth conveyor belt that is arranged in front of the third conveyor belt 10 in the conveying direction and is configured to convey in a direction perpendicular to the third conveyor belt 10 and that conveys intermittently. The second conveyor belt 4 supplies the product 2 to the third conveyor belt 10 while moving its tip 9 forward in the conveying direction, and at this time, the third conveyor belt 1
A device for grouping stacked and flowing products, characterized in that 0 stops conveyance. 2. A first conveyor belt 21 that continuously conveys the product 22; and a first conveyor belt 21 that is arranged below the first conveyor belt 21 and is configured to convey the product in the opposite direction to the conveyance direction of the first conveyor belt 21, and the whole product 22 is conveyed in the conveyance direction. a second conveyor belt 23 that reciprocates; and a second conveyor belt 23 that is disposed below the second conveyor belt 23 and is configured to convey in a direction opposite to the conveyance direction of the second conveyor belt 23, and that is configured to convey at least the conveyance end of the second conveyor belt 23. a third conveyor belt 26 extending over the range in which the section 25 moves; and a third conveyor belt 26 arranged in front of the third conveyor belt 26 in the conveying direction and configured to convey in a direction perpendicular to the conveying direction of the third conveyor belt 26. and a fourth conveyor belt 27 that conveys intermittently, and when the second conveyor belt 23 stops rotating and moves in the conveying direction, and the second conveyor belt 23 stops moving, the fourth conveyor belt 27 conveys intermittently. 2 conveyor belt 2
3 rotates the belt to feed the products 22 to a third conveyor belt 26.