JP2005282846A - Fastening status indicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve safety of equipment such as a bicycle by visualizing fastening status of a quick release and a bolt with a knob. <P>SOLUTION: By fastening the quick release 1 and the bolt 2 with the knob through a spring hole 12 and a base hole 13, the spring 6 is bent, a green display part 4 goes up by fulcrum action of a protrusion 7 of a base 5 and covers a red display part 3. Color change from red to green occurs when sufficiently fastened can be visually recognized from three directions by making a part of a case 16 for covering from these display parts to the protrusion 7 part transparent or as an observation hole. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

A technology that displays the tightening state of the quick release 1 and the bolt 2 with the knob that is tightened without using tools, such as attaching / detaching the bicycle wheel, up and down the seat post and handle, and the folding device of the folding bicycle.

  Although it is possible to monitor the tightening state of a bolt or the like with a pressure-sensitive element or a strain gauge, it is not appropriate as a method for monitoring / displaying the tightening state in an inexpensive / lightweight product such as a bicycle handled by everyone.

This is a technology that uses spring wrinkles such as spring washers as they are.
Utility Model Application 3-104630 Tsutsumimok "folding bicycle" Group wooden horse edition "Bicycle terminology handbook"

By visually displaying the tightening condition of the quick lever and bolt with knob, the tightening force can be visually judged, and the user can respond to loosening due to vibration during use.

However, in order to cope with the conventional tightening method, it is necessary to ensure reliability, reduce the number of parts as much as possible, and make it compact, and the structure is as follows. On the extension of the spring 6 corresponding to a spring washer, there is a green display 4 or a display 10 that changes from red to yellow through yellow, or numerically, or displays both. A pedestal 5 is overlapped with the spring 6, and one end of the pedestal is inserted into the spring 6 and a slot 11 of the spring 6 as shown in FIG. 5, and a part of the mim 8 is bent and the spring 6 and the pedestal 5 are bent. Are loosely coupled. On the other side of the pedestal, there is an indicator 3 displayed in red via a projection 7 serving as a fulcrum of the spring 6, or a pointer 9 as shown in FIG.

In FIG. 3, when the quick release 1 or the bolt 2 with the knob is tightened through the spring hole 12 and the pedestal hole 13, the spring 6 is bent, and the green display portion 4 is displayed by the fulcrum action of the protrusion 7 of the pedestal 5. The red display part 3 is covered. By making a part of the case 16 that covers these display parts to the projection 7 part transparent or peephole, it will change from red to green when fully tightened. Visible from three directions.

In FIG. 4, the same operation as described above is performed, but the display changes from red to yellow to green or is displayed numerically by a square or round pointer 9 provided at the tip of the base 5. Or the relative position with the indicator 10 which displayed both can be confirmed from three directions. By preparing a case 16 that covers a part from the display part to the projection 7 part with a part transparent or a peep hole, breakage and dirt can be prevented. Further, instead of the pointer 9, the pointer can be displayed in a transparent peephole of the case 16 by a method such as printing or digging.

This tightening status indicator is sufficiently compact and lightweight, so it can be attached to the case 16 or the object to be fastened to the pedestal 5 with double-sided tape or adhesive, and the mounting angle can be seen from three directions, thus ensuring freedom in the angle. It can be installed so as not to interfere with the knob or quick release.

Since the tightening force varies depending on the tightening place, a tightening state indicator corresponding to the tightening force is manufactured / mounted by selecting the spring strength. For this reason, the case 16 is displayed with an appropriate tightening force.

In addition, the switch contact B provided on the spring 6 and the switch contact A provided on the base 5 come into contact with the movement of the green display 4 and the display 10. A warning sound can also be generated when this contact is broken.

The present invention can prevent an accident in an incomplete tightening state.

Further, by visually displaying the tightening force, those springs 6 manufactured / selected corresponding to the necessary tightening force are mounted at the manufacturer or dealer. As a result, the tightening strength can be visually optimized, and insufficient tightening or excessive tightening can be avoided.

The present invention can be applied to all devices having a portion in which a tightened state is desired to be visually recognized other than a bicycle.

Drawing 1

Quick release tightening cross section

Drawing 2

Cross section of tightened bolt with knob

Drawing 3

Sectional view A of the tightening state indicator

Drawing 4

Sectional view B of the tightening state indicator

Drawing 5

Perspective view of section B of the tightening state indicator

Drawing 3

Case figure of section B of the proposed tightening state indicator

Explanation of symbols

1 Quick Release 2 Bolt with Knob 3 Red Indicator 4 Green Indicator 5 Pedestal 6 Spring 7 Protrusion 8 Mimi 9 Pointer 10 Indicator 11 Slot 12 Spring Hole 13 Pedestal Hole 14 Switch Contact A 15 Switch Contact A
16 cases

Claims (2)

  Tightening status indicator that displays the quick release, bolt with knob and tightening state or tightening force of the spring using the deformation of the spring in color or numerical value   Tightening status indicator that detects not only a visual warning but also a warning sound by detecting spring deformation with a switch

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