JPH0169937U - - Google Patents

Description

[Brief explanation of the drawing]

1 and 2 are a plan view and a side view of a belt tightening device according to the present invention, and FIGS. 3 and 4 are
FIG. 5 is a central longitudinal cross-sectional view of the main body A and the winding lever B, FIG. 5 is a central cross-sectional view of the engagement plate 18 for preventing reverse rotation of the main body A, and FIG. 6 is a central cross-sectional view of the engagement plate 26 of the winding lever B.
7 is a sectional view taken in the direction perpendicular to the axis of the winding shaft 2, and FIG. 8 is a central longitudinal sectional view of the part where the winding lever B is located at the winding start end. 9th
Figure A is a central longitudinal cross-sectional view of the take-up lever B in a state where the engagement plate 26 of the release lever C has come into contact with the stopper part 44, and Figure B is an enlarged view of the second cam part 50. FIG. 10A is a central longitudinal sectional view of the state in which the engagement plate 26 of the take-up lever B and the first cam portion 46 of the main body A have started to engage, and FIG. 11A is an enlarged view of the second cam portion 50 of the take-up lever B and the engagement plate 1 for preventing reverse rotation.
8 is an enlarged view of the second cam portion 50. FIG. Explanation of symbols of main parts, A: Main body, B: Take-up lever, C: Release lever, V ₁ : Tension side belt, V ₂ : Fixed side belt, 2: Winding shaft, 6: Ratchet, 18: Engagement plate for preventing reverse rotation, 25: Compression spring (biasing means for engagement plate for preventing reverse rotation), 26
: Engagement plate provided on the release lever, 42: Compression spring (biasing means for the engagement plate of the release lever), 4
4: Stopper part, 46: First cam part, 50:
Second cam part, 50a: start part of the second cam part.

Claims (1)

[Scope of Claim for Utility Model Registration] A winding shaft with a ratchet integrally attached thereto is supported at one end of the main body, the tip of the winding lever is rotatably supported on the winding shaft, and the winding lever is rotatably supported on the winding shaft. A release lever with a mating engagement plate is attached to the take-up lever, and an engagement plate for preventing reverse rotation is attached to the main body to prevent the take-up shaft from reversing by engaging with the ratchet by the biasing force of the biasing means. A stopper part is brought into contact with the engagement plate provided at the tip of the lever to determine the winding end of the take-up lever, and when the belt is rewinded, the stopper part disengages from the ratchet and engages the engagement plate of the release lever. A first cam part for rewinding the belt is provided at one end of the main body, and a second cam part for retracting the reversal prevention engagement plate against the urging force of the urging means when the belt is rewinded. When the take-up lever is rotated beyond the end of winding while the release lever is pulled, a second cam part provided at the end of the take-up lever is used to prevent reverse rotation. A belt tightening tool that utilizes a ratchet mechanism configured to allow the take-up shaft to reverse rotation by disengaging the plywood from the ratchet by retracting the plywood. Adjust the positional relationship between the stopper part and the start part of the second cam part provided at the tip of the winding lever by pulling the release lever while rotating the winding lever to the winding end. By further rotating the lever, the engagement plate of the release lever starts to engage with the first cam part of the main body, and then the second cam part at the tip of the take-up lever and the engagement plate for preventing reverse rotation start to engage. A belt tightening tool using a ratchet mechanism, characterized in that engagement is determined to start.