JP3023620U - Zenmai spring outer end support mechanism - Google Patents

Abstract

(57) [Summary] (Revised) [Purpose] For construction machines, industrial machinery, general equipment, etc., for winders (reels) that use full-length springs, especially when endurance life is required. The outer end of the spring is freely supported to prevent stress concentration, and the overall diameter of the spring barrel is made compact to improve the assemblability. [Structure] When the wire of the winding machine (reel) equipped in the general equipment is pulled out, the whole dance spring barrel 1 is rotated and the inner end of the whole dance spring is tightened more and more. The outer end of the whole dance spring is pressed against an arcuate notch with a width of about 40 ° provided inside the full dance spring barrel 1 (all dance spring case), and is oriented in the winding direction. Only the shearing force works on the eyeballs of
As a result, the mechanism is such that stress concentration due to bending moment does not occur.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 Used in construction machines, industrial machines, general equipment, etc., where a winding machine (reel) that uses full-fledged springs requires a long life and has a limited installation space, and it is necessary to make the winding machine compact. To do.

[0002]

[Prior art]

 Conventionally, the method of supporting the outer ends of all Mai-springs has often been screw fixing with screws or crimping. In addition, a method has been conventionally devised in which a pin (shaft) is protruded from the side surface of the full-spring spring barrel and the outer end of the full-spring spring is inserted into the pin to prevent stress concentration due to pin fixing.

[0003]

[Problems to be solved by the device]

 However, with the method of supporting the outer ends of all the Mai springs, when the screws are fastened with bolts or the caulking is tightened, the outer ends of all Mai springs are extremely bent inward and the life is shortened due to stress concentration. In addition, if the pin is fixed without stress concentration, the durability life will be improved, but the pin (shaft) sticks out from the side of the Zenmai spring barrel, increasing the number of parts and increasing the cost. There was a drawback that the spring barrel (all-mai spring case) was large.

Therefore, the present invention aims to improve the durable life and assemblability of the whole dance spring and to make it compact with low cost to solve the above-mentioned conventional problems.

[0005]

[Means for solving the problem]

 The technical means for solving the above-mentioned problems is such that a part of the inner side of the whole Mai-spring barrel (all-mai spring case) is cut out in an arc shape, while the outer end of the whole Mai-spring is rounded and freely supported by its end face. That is.

[0006]

[Action]

 According to the all-mai-spring outer end support mechanism having the above-described configuration, when the all-mai spring is tightened more and more, the freely supported outer ends of all-mai springs are oriented in the winding direction. It does not act on the outer ends of all Mai-springs, and the outer ends of all Mai-springs are supported by arcuate parts that are cut out in the inner part of the barrel, so there is no pin (shaft) from the side, It is not necessary to decide the insertion position of the Mai-spring, and the number of parts can be reduced, resulting in a compact and low cost.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external view schematically showing a winding machine (reel) A equipped with a full-spring spring outer end support mechanism of the present invention. 2 to 4 are explanatory views of the operation of the outer end support mechanism of the full-spring. As shown in FIG. 2, there is an arc-shaped cutout 1a having a width of about 40 ° inside the whole Mai-spring barrel 1 (all-mai spring case). On the other hand, the outer end 2a of the whole dance spring 2 has a rounded eyeball 2b with the smallest semi-diameter that can be manufactured, and its end is pressed against the notch 1a, and the inner end 2c of the full spring is movable on the shaft 3. It is connected. Further, the shaft 3 is pivotally supported by a bush 5 inserted in a full-spring spring barrel 1 and a cover 4, respectively. Further, a wire end 6a is inserted and fixed in a groove 1b on the outer side of the whole dance spring barrel 1 (all dance spring case). Therefore, if the wire 6 is pulled out, the whole dance spring barrel 1 rotates, the whole dance spring inner end 2c is wound up, and the whole dance spring 2 is oriented in the winding direction as shown in FIG. Has no mechanism other than shearing force, and as a result, does not generate stress concentration due to bending moment.

Since the eyeball 2b of the outer end 2a of the whole spring is rounded with the smallest radius that can be manufactured, the width 1c of the arc-shaped cutout 1a inside the barrel 1 of the whole spring can be machined small, and the outer end of the whole spring can be reduced. Since the eyeball 2b of 2a is molded on the outside of the whole dance spring 2, the whole dance spring 2 can be assembled inside the whole dance spring barrel 1 without any gap.

Therefore, as compared with the conventional method in which the pin 8 is protruded from the side surface of the barrel barrel as shown in FIG. 4, the barrel barrel diameter can be made smaller. Further, as shown in FIG. 5, by rotating the whole dance spring 2 regardless of the insertion position (winding the shaft 3 in the direction of the arrow), the eyeball 2b at the outer end of the full dance spring is automatically fixed, so that the assemblability is improved. With improvement, automation becomes easier.

[0010]

[Effect of device]

 As described above, according to the present invention, a part of the inner side of the whole dance spring barrel (all dance spring case) is cut out in an arc shape, while the outer end of the whole dance spring is rounded and freely supported by the end face. Since the outer end of the whole dance spring is supported, the outer end of the whole dance spring is oriented in the direction in which it is wound even if it is wound. The ends of the springs are extremely bent inward, which reduces the durability life due to stress concentration.The screws are fixed with bolts, and the caulking method is used to support the outer ends of all springs. Since the pin (shaft) is protruded from the side, the number of parts increases and the cost increases, and unlike the case of pin fixing where the whole dance spring barrel (all dance spring case) becomes large, it has a long life and is compact and low cost. The effect of being able to That. Also, since the outer end of the full-spring is automatically fixed by rotating (winding) the full-spring, regardless of the insertion position, the assemblability is improved and automation is facilitated.

[Brief description of drawings]

FIG. 1 is an external view (cross-sectional view) schematically showing a winding machine (reel) equipped with a full-spring outer end support mechanism.

FIG. 2, FIG. 3, and FIG. 4 are operation explanatory diagrams of the full-spring spring outer end support mechanism.

FIG. 5 is an explanatory diagram of the insertion of all-mai springs.

[Explanation of symbols]

 A Winding machine (reel) 1 Zenmai spring barrel 1a Arc-shaped notch 1b Outside groove of Zenmai spring barrel 1c Arc-shaped notch width 2 Zenmai spring 2a Zenmai spring outer end 2b Zenmai spring outer end Eyeball 2c Zenmai Spring Inner End 3 Shaft 4 Cover 5 Bush 6 Wire 6a Wire End 7 Pin

Claims (1)

[Scope of utility model registration request] 1. An outer end of the whole dance spring, characterized in that a part of the inner side of the whole dance spring barrel (all dance spring case) is cut out in an arc shape, while the outer end of the whole dance spring is rounded and freely supported by the end face. Support mechanism.