Robot Bag-Opening Control With Downward Cut Rotation

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Solution Overview

Problem

Existing robot control systems face challenges in preventing contents from adhering to robots and cutters during the bag-opening process.

Innovation Solution

A robot control system that includes one or more robots, a cut control module to move a cutter or material to make a cut, and a rotation control module to rotate the material so that the cut faces downward, thereby preventing content adherence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the robot performs cutting work on the material, then the bag-opening function is achieved, but the content may adhere to the robot and cutter

Engineering Contradiction:

Improvebag-opening efficiencyVSAvoidcontent adhesion to robot and cutter

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary actions by rotating the material to a specific orientation (with the cut facing downward) before the cutting operation completes and during the subsequent content discharge phase. This preliminary positioning prevents content adhesion before it occurs

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of rotating the material in a conventional manner, the system inverts the orientation by ensuring the cut surface faces downward during rotation. This inverted approach causes content to fall away from the robot and cutter rather than adhering to them

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If the material is rotated after cutting, then content discharge is improved, but the complexity of control increases

Engineering Contradiction:

Improvecontent discharge efficiencyVSAvoidcontrol system complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The system merges the rotation control function with the existing robot control architecture. The rotation operation is integrated into the sequential control flow alongside cutting and discharge operations, eliminating the need for separate complex control systems

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The material rotation is performed continuously as part of the overall bag-opening process, maintaining useful action throughout. The rotation begins after cutting and continues through the discharge phase, ensuring content consistently falls away without interruption

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentEP4520487A1Robot control system, robot controller, and robot control method

Publication Date: 2025.03.12 YASKAWA DENKI KK

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AI summary

To prevent a content from adhering to at least one of a robot and a cutter, one or more robots (20A, 20B) of a robot control system (1) each perform work on a material (M) including a content. A cut control module (101) causes the robots (20A, 20B) to move at least one of a cutter (40) and the material (M) so that a cut is made in the material (M) with the cutter (40). A rotation control module (103) causes the robots (20A, 20B) to rotate the material (M) so that the cut faces downward.