Automatic protective sheet deployment device

Abstract

The present invention provides an automatic protective sheet deployment device that can stably deploy protective sheets while eliminating tangling that occurs during the automatic deployment process. [Solution] The automatic protective sheet deployment device automatically deploys protective sheets such as soundproof sheets, fire-retardant sheets, and mesh sheets used for scaffolding, etc. To solve the problem of reduced work efficiency and quality variations caused by entanglement when unrolling protective sheets that are in a rolled or folded state, a chain 2 rotatably mounted on a frame 1 is driven by a motor 9, and multiple hooks 3 fixed to the chain are engaged with grommet holes at the end of the protective sheet to continuously extend it. When stretched, the hook position changes due to the deflection of the chain, stabilizing the engagement, and the hooks rotate approximately 180 degrees and automatically release when passing the folded structure at the end of the chain. Furthermore, a swingable arch-shaped retaining bar A3 absorbs resistance according to the tension, and the deployment continues while untangling the protective sheet with a swinging motion.

Claims

1. An automatic protective sheet deployment device comprising a chain rotatably mounted on a frame, a drive means including a motor for driving the chain, and a plurality of hooks fixed to the chain, wherein the hooks change their orientation in accordance with the deflection of the chain that occurs when the protective sheet is stretched, tilting in the direction of lying down when stretched to hold the protective sheet securely in place, and automatically releasing the protective sheet when the orientation of the hooks reverses as they pass over a folded structure provided at the end of the chain.

2. An automatic protective sheet deployment device according to claim 1, wherein the hook engages its tip with an eyelet hole provided at the end of the protective sheet.

3. An automatic protective sheet deployment device according to claim 1 or 2, characterized in that the hook is a J-shaped hook for lightweight protective sheets, or an L-shaped hook for heavy protective sheets.

4. An automatic protective sheet deployment device according to any one of claims 1 to 3, characterized in that the tip of the hook faces rearward with respect to the direction of travel of the chain.

5. An automatic protective sheet deployment device according to any one of claims 1 to 4, comprising a retaining bar for holding down the protective sheet, wherein the retaining bar is arranged to hang down with a hinge on one side as a pivot point, and swings diagonally downward when a certain level of tension is generated when the protective sheet is deployed.

6. An automatic protective sheet deployment device according to claim 5, characterized in that the retaining bar continues deployment while resolving entanglement of the protective sheet.

7. An automatic protective sheet deployment device according to any one of claims 1 to 6, wherein the flange supporting the shaft supporting the sprocket is attached to a flange mounting base that is vertically adjustable relative to the frame, and the tension of the chain can be adjusted by adjusting the position of the flange mounting base.

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