JP3909463B2 - Quick lever tightening device - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a quick lever tightening device that prevents malfunction by preventing a head from being tightened by rotating a lever.
[0002]
[Prior art]
Conventionally, a tightening mechanism using a quick lever in a bicycle, that is, a quick lever system, is widely used for a front and rear wheel axle as a detachable mounting mechanism with a frame, and as a vertical adjustment tightening of a saddle. Is rotated halfway in the axial direction, the head fitted on one end of the tightening shaft is moved by an eccentric cam integrated with the lever, the distance between the head and the nut screwed to the tightening shaft is expanded, and the space between them is tightened To do.
[0003]
[Problems to be solved by the invention]
As mentioned above, the conventional quick lever system used to fix the front and rear wheel axles and the saddle post, but the nut can be turned by hand. First, with the quick lever loosened, the nut was turned by hand to tighten it to the temporary tightening position, and then the lever was half-rotated in the axial direction to perform final tightening. However, apart from cyclists, amateur road racers, etc., who have expertise, general users who do not know this have an illusion that incomplete nut tightening that rotates by rotating around the lever is in a completely tightened state. It was an end.
[0004]
From this point of view, the present invention prevents the lever from rotating at all in the direction in which the tightening shaft rotates, only allows the lever to slide halfway in the axial direction and slide in the axial direction. It was made for the purpose of preventing.
[0005]
[Means for Solving the Problems]
In a quick lever tightening device comprising a head having a tightening shaft, a lever, a nut, and a non-turn washer, the anti- rotation washer is provided with an anti-rotation engagement piece and a lever lock piece on the outer periphery thereof. Separated from each other and integrally formed, the locking washer is disposed between the tightening surface of the head having the lever and the tightened portion, and the head is locked to hold the lever at the time of clamping. There is a quick lever tightening device that prevents malfunctions.
[0006]
The locking washer has a lever locking piece portion having an engaging groove that engages with the outer peripheral surface of the bent portion of the lever portion of the lever, with an insertion hole of the tightening shaft at the center and spaced apart from the outer peripheral edge. In addition, the anti-rotation engaging piece that is inserted into the anti-rotation recess formed in the tightened portion may be bent.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In a quick lever clamping device comprising a head having a clamping shaft, a lever, a nut, and a locking washer, the locking washer opens a fitting hole for the clamping shaft in the center and is spaced apart from the outer periphery. A lever locking piece having an engagement groove that engages with the outer peripheral surface of the lever shaft at the bent end side , and a rotation engagement piece that fits into a rotation depression formed in the tightened portion the door by bending, the deployment to erroneously perform anti-rotation head that bearing the lever during clamping operation between the clamping surfaces and sneak bearing member of the head in the times washers the quick with lever clamping device Quick lever tightening device to prevent.
[0008]
【Example】
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A quick lever tightening device that prevents malfunction of the present invention will be described below with reference to the drawings showing an embodiment. A quick lever tightening device 1 that prevents malfunction according to the embodiment includes a tightening shaft 2 and a lever 3. It comprises a head 4, a nut 5, and a non-turn washer 6.
[0009]
One end of the tightening shaft 2 is slidably fitted with the head 4 crowned, and a piston portion 2a having an eccentric cam bearing hole 2a1 opened in the transverse direction, and the nut 5 is screwed to the other end. And a screw portion 2b to be formed.
[0010]
The lever 3 has a shaft portion 3b bent in an L shape with respect to the lever portion 3a. The shaft portion 3b is formed with a large diameter shaft portion 3b1 on the lever portion 3a side and a small diameter shaft portion 3b2 on the tip side. The middle is formed in the eccentric cam portion 3b3 within the outer shape of the large-diameter shaft portion 3b1.
[0011]
The head 4 has a cylindrical insertion hole 4b in which a piston portion 2a formed at one end of the clamping shaft 2 is slidably fitted in the axial direction on the clamping surface 4a, and the piston portion is inserted into the cylindrical insertion hole 4b. In this piston portion 2a, the eccentric cam portion 3b3 of the shaft portion 3b of the lever 3 is fitted and linked to the eccentric cam bearing hole 2a1 opened in the axial direction and the transverse direction of the piston portion 2a. The shaft portion 3b1 is loosely fitted in the large-diameter bearing hole 4c1 of the head portion 4, the small-diameter shaft portion 3b2 on the distal end side on the lever portion 3a side is loosely fitted in the small-diameter bearing hole 4c2, and the lever portion 3a The outer clip 7 is engaged and assembled to the protruding portion 3b21 on the outer end of the small-diameter shaft portion 3b2.
[0012]
The anti-rotation washer 6 has an engagement groove 6b1 that opens into the center of the fitting shaft 6b of the tightening shaft 2 and is spaced apart from the outer peripheral edge to engage with the outer peripheral surface 3b4 of the lever 3 at the bent end side. The lever locking piece 6b and the rotation engaging piece 6c that fits into the rotation recessed portion 8a formed in the tightened portion 8 are provided.
[0013]
Since the malfunction-preventing quick lever tightening device 1 of the present invention is configured as described above, for example, a front half 9a and a rear half 9b in which a frame 9 supporting a front wheel and a rear wheel is divided in the middle. Is pivotally supported by the corresponding portion, and is used for a folding bicycle tightening device capable of rotating in the unfolded traveling state shown in FIG. 3 and the folded reduced state shown in FIG. To explain, the fastening shaft 2 supported on the bearing cylinder 11 of the rear half 9b passes through the arc-shaped holes 13a and 13b centering on the pivot shaft 10 of the polymerization coupling plates 12a and 12b of the front half 9a, and the polymerization coupling plate 12a. , 12b, the head 4 and the nut 5 of the fastening shaft 2 are arranged, the front half 9a and the rear half 9b of the frame are rotated around the pivot shaft 10, and the fastening shaft 2 is moved to the head 4 and the nut 5 Along with arcuate holes 13a and 13b The rotation stopper washer 6 is disposed inside the head 4 and the rotation engaging piece 6c corresponds to the corresponding overlapping link plate 12a corresponding to the tightened portion 8. When the arc-shaped hole 13a is inserted as the rotation-recessed recessed portion 8a, the engaging groove 6b1 of the lever locking piece portion 6b is engaged with the shaft portion 3b of the lever 3, so that the head 4 The associated tightening shaft 2 cannot be rotated around the axis with the lever 3, and the lever 3 is rotated halfway downward in the axial direction at any position so that the superposition coupling plates 12 a and 12 b are connected to the head 4 of the tightening shaft 2. The nut 5 can be clamped and fixed. That is, when the lever 3 is half-rotated in the axial direction from the free position shown in FIG. 6 to the tightening position in FIG. 7, the eccentric cam portion 3b3 is half-rotated to slide the tightening shaft 2 with respect to the head 4. The interval between the portion 4 and the nut 5 is reduced, and the polymerization linkage plates 12a and 12b are clamped and fixed. The release of the tightening force can be performed by operating the lever 3 upward in the opposite direction to the clamping and fixing.
[0014]
【The invention's effect】
The quick lever tightening device for preventing malfunction according to the present invention is, as in the embodiment, clamped and fixed in a traveling state in which the front half and the rear half of the frame are unfolded, and the front half and the rear half of the frame centered on the pivot. When rotating to the unfolded or folded state, the rotation washer is always fitted in the arc-shaped hole of the polymerization linkage plate, so that it can be locked at any position and tightened at any position. The range of use is wide. For example, it can be pushed and moved while the frame is appropriately reduced, and is convenient for handling in crowded places and narrow bicycle parking lots.
[0015]
Therefore, the malfunction-preventing quick lever tightening device of the present invention is as described above, and is specified from the operation method of the quick lever and can completely prevent malfunctions of general users. is there.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a quick lever tightening device that prevents malfunction of the present invention.
FIG. 2 is a perspective view of a single locking washer used in the quick lever tightening device that prevents malfunction of the present invention.
FIG. 3 is also a partial perspective view of a traveling state in which a folding bicycle in which the quick lever tightening device that prevents malfunction of the present invention is implemented is developed.
FIG. 4 is a partial perspective view of a folded state in which the folding bicycle is reduced.
FIG. 5 is a partially enlarged cross-sectional explanatory view showing an example of an arrangement state of a quick lever tightening device for preventing malfunction in the folding pivot portion of the folding bicycle.
FIG. 6 is a partially enlarged cross-sectional explanatory view of the tightened state of the quick lever tightening device that prevents malfunction.
FIG. 7 is a partially enlarged cross-sectional explanatory view of the quick lever tightening device in a relaxed state.
8 is an explanatory cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Quick lever clamping device 2 Tightening shaft 2a Piston part 2a1 Eccentric cam bearing hole 2b Screw part 3 Lever 3a Lever part 3b Shaft part 3b1 Large diameter shaft part 3b2 Small diameter shaft part 3b21 Projection part 3b3 Exencam part 3b4 4 Head 4a Tightening surface 4b Cylindrical insertion hole 4c1 Large diameter bearing hole 4c2 Small diameter bearing hole 5 Nut 6 Locking washer 6a Insertion hole 6b Lever locking piece 6b1 Engaging groove 6c Locking engagement piece 7 8 Tightened portion 8a Anti-rotation recessed portion 9 Frame 9a Front half portion 9b Rear half portion 10 Pivot shaft 11 Bearing cylinder 12a Polymerization linkage plate 12b Polymerization linkage plate 13a Arc-shaped hole 13b Arc-shaped hole

Claims (2)

In a quick lever tightening device comprising a head having a tightening shaft, a lever, a nut, and a non-turn washer, the anti- rotation washer is provided with an anti-rotation engagement piece and a lever lock piece on the outer periphery thereof. Separated from each other and integrally formed , the rotating washer is disposed between the tightening surface of the head having the lever and the tightened portion, and the rotation of the head bearing the lever at the time of clamping is arranged. apparatus with a quick lever clamping to prevent malfunction make a stop.   The locking washer has a lever locking piece portion having an engaging groove that is engaged with the outer peripheral surface of the bent portion of the lever portion of the lever. 2. The quick lever tightening device according to claim 1, wherein a rotation-engaging engagement piece portion fitted into a rotation-recessed recessed portion formed in the tightened portion is formed by bending.

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