JP2006307963A - Locking washer and screws with locking washer attaching same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking washer almost never loosening up and screws with locking washers attaching the same. <P>SOLUTION: This locking washer 1 has two or more legs 7 at a lower part of a cylinder shape or an umbrella shape washer. The legs are compressed when they are pressed against a matter to be fastened by fastening of the screws, restoration force is accumulated. The washer 2 is pressed against a head part back surface of the screws and a fastening member by restoration force, makes a bolt and nut not easily rotate in reverse direction and not loosen up easily. A fitting projection formed on the washer fits in a fit in socket part of the bolt and the nut to regulate rotation of the bolt and the nut in a loosening direction and to prevent loosening up of the bolt and the nut. The washers are attached to the nut or the bolt in such a manner that the same can slide and rotate but do not come off. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a locking washer that prevents loosening of screws such as nuts and bolts that connect and tighten wooden, resin, rubber, and metal plates and blocks, and its locking The present invention relates to a screw with a locking washer to which a washer is attached.

  There are various types of conventional locking washers and screws to which the washers are attached. For example, as shown in FIG. 11, a bolt F and a nut F are connected to a nut F that is screwed and fastened to a screw flange E of a bolt C with a head D that can be inserted into a plurality of fastened members A and B. Some have a disc spring washer G that can be elastically deformed flatly by receiving a tightening force. As shown in FIG. 11, the disc spring washer G has an engaging portion H that protrudes from the bottom surface of the nut F and is rotatably inserted into the central hole I of the washer. The disc spring washer G shown in FIG. 11 is pushed and elastically deformed when the bolt C and the nut F are tightened, and the deformed disc spring washer G is wedge-shaped between the fastened member A and the back surface of the nut F by its restoring spring force. The nut is difficult to reversely rotate, so that the nut and bolt can be prevented from loosening (see Patent Document 1).

JP 2002-122120 A

  The disc spring washer G shown in FIG. 11 is more difficult to loosen than ordinary bolts and nuts, but cannot completely prevent loosening due to vibration after tightening.

  The present invention provides a locking stopper washer that hardly loosens, and a screw with a locking stopper washer assembled thereto.

  The looseness washer of the present invention is a washer that can be set or attached to the back side of the head of a screw, and two or more legs are formed in the circumferential direction of the bottom of the tubular or umbrella-like washer, and these legs are screws. It is pressed against the object to be tightened by the kind of tightening and compressed, and the restoring spring force is stored.

  The locking washer of the present invention has a fitting projection formed on the upper edge of a cylindrical or umbrella-shaped washer hole, and the fitting projection is pushed inward when the washer is pressed by tightening the screws. The nuts and bolts are restricted from rotating by being fitted to the fitting receiving portions.

  In the locking washer of the present invention, two or more legs are formed in the circumferential direction of the bottom of the tubular or umbrella-shaped washer, and a fitting protrusion is formed on the upper edge of the hole of the washer. When it is pressed against the object to be tightened, it is compressed and the restoring spring force is accumulated, and when the washer is pressed by tightening the screw, the fitting protrusion is pushed inward to fit into the fitting receiving part of the screw. Thus, the rotation of the nut or bolt is restricted.

  The screw with a locking washer according to the present invention is one in which any one of the locking locking washers is slidable and rotatable on the back side of the head of the screw so as not to fall off.

  A screw with a locking washer according to the present invention attaches a locking locking washer having any one of the above-mentioned fitting protrusions to the back side of the head of the screw so that it can be slid and rotated and does not fall off. A fitting receiving portion into which the fitting protrusion of the locking stopper washer is fitted on the back side.

  The locking washer of the present invention forms two or more legs in the circumferential direction of the hem of the washer, and the legs are compressed when pressed against the object to be tightened by tightening screws, and the restoring spring force is stored. The washer is brought into close contact with the back surface of the screws and the object to be tightened by the restoring spring force, the frictional force is increased, the washer is difficult to rotate, and the tightened screws are not easily loosened.

  The loosening washer of the present invention has a fitting projection formed on the upper edge of the hole of the washer, and the fitting projection is formed on the back side of the head of the screw by being pushed inward when the washer is tightened by the screw. Since the rotation of the screws is restricted by fitting into the fitting receiving portion, the screws do not loosen unless the fitting protrusion is detached from the fitting receiving portion. This loosening prevention effect is exhibited even with a small washer.

  The screw with the locking washer according to the present invention is a screw having the locking effect of the locking washer because the locking washer is attached so as not to drop off the back side of the head of the screw. In addition, it is easy to use without the trouble of setting the locking stopper washer to the screws one by one at the time of use. Furthermore, since the locking stopper washer is slidably and rotatably attached to the back side of the head of the screw, the screw can be tightened smoothly.

  A screw with a locking washer according to the present invention is a fitting in which the locking washer is attached to the back side of the head of the screw, and a fitting protrusion formed on the upper edge of the hole of the washer is fitted to the back side of the screw. Since the receiving part is formed, when the screws are tightened and the locking washer is pressed and compressed, the fitting projection protrudes inward and automatically fits into the fitting receiving part of the screw. As long as it is not disengaged from the fitting receiving portion, the screws cannot reversely rotate and do not loosen.

(Embodiment 1 of a locking washer)
An example of the embodiment of the locking washer of the present invention will be described in detail with reference to FIGS. The locking washer 1 shown in these figures is formed on an inclined surface in which an upper part 3 of a cylindrical washer 2 gradually inclines inward, and fitting protrusions 4 are provided inwardly at three upper ends of the upper part 3. The side surface (outer peripheral surface) 5 of the washer 2 is formed substantially vertically, and a large number of legs 7 are defined by notches 9 at the hem of the washer 2, and the lower end of each leg 7 is expanded at the hem (outwardly spread). Is formed. With this structure, the washer 2 is compressed when a screw such as a bolt or a nut is tightened and pressed against an object to be tightened, and a restoring spring force is stored. The shape of the washer 2 is not limited to the shape shown in FIG. 1, but a cylindrical shape that is vertical from top to bottom, an umbrella shape as shown in FIG. Can do. When there is no upper part 3, the fitting protrusion 4 protrudes inward from the upper edge of the leg 7. In either case, when the screws are tightened and pressed, they are compressed and the restoring spring force is accumulated.

  The leg 7 is formed between the notches 9 by dividing the lower part of the washer 2 by the notch 9, but is formed by dividing the slit 10 into the lower part of the washer 2 as shown in FIG. You can also The lower portion of the leg 7 is curved outwardly as shown in FIG. 3 so as to widen the hem, but conversely, the leg 7 can be curved inward to be formed inwardly. If the lower part of the leg 7 is widened at the bottom, the compression tends to further widen by the compression. When the skirt is further widened and the inner side is deflated, the contact area between the leg 7 and the object to be tightened is increased and the frictional resistance is increased, so that the tightened screws are further less likely to loosen.

  The fitting protrusion 4 protrudes inward from the inner peripheral surface 8 of the hole 6 of the washer 2 as shown in FIGS. Although the fitting protrusion 4 is formed in three places of the inner peripheral surface 8, the number may be more or less than that, and the shape may also be a shape other than illustrated. The number, length, width, etc. of the legs 7 can be arbitrarily selected.

(Embodiment 1 of a screw with a locking washer)
An example of an embodiment of a screw with a locking washer of the present invention will be described with reference to FIGS. A screw with a locking washer shown in FIG. 6 is a case where the screw is a bolt, and the locking washer 1 of FIGS. 1 to 5 is attached to the back side of the head 12 of the bolt 11.

  In order to form the bolt with the locking washer shown in FIG. 6, the bolt rod 13 before thread rolling shown in FIG. 7 is inserted into the hole 6 of the washer 2, and a screw thread is formed on the outer peripheral surface of the bolt rod 13. The outer diameter of this thread is made larger than the inner diameter connecting the tips of the fitting projections 4 of the washer 2 to prevent the washer 2 from falling out (not falling off) from the bolt rod 13, and the bolt rod 13 The washer 2 can be slid in the axial direction and rotated in the circumferential direction without cutting a screw thread in the root portion 14. Further, as shown in FIG. 7, fitting receiving portions 15 are formed at several locations of the base portion 14 of the bolt rod 13. The fitting receiving portion 15 is a place where the fitting projection 4 of the washer 2 is fitted, and is recessed to a size and depth that allows the fitting projection 4 to be fitted. The number is the same as or more than the number of the fitting protrusions 4.

(Embodiment 2 of a screw with a locking washer)
Another embodiment of the screw with a locking washer of the present invention will be described in detail with reference to FIG. This screw with a locking washer is a case where the screw is a nut, and the locking washer 1 of FIGS. 1 to 5 is attached to the back side of the head 17 of the nut 16 shown in FIG. As shown in FIG. 9, a cylindrical mounting portion 18 protrudes from the back surface of the nut 16, and the mounting portion 18 has an outer diameter that can be inserted into the hole 6 of the washer 2. The fitting receiving part 15 is formed in several places. This fitting receiving portion 15 is also a place where the fitting projection 4 of the washer 2 is fitted, and is recessed to a size and depth that allows the fitting projection 4 to be fitted. The number thereof is the same as or more than the number of the fitting protrusions 4.

  In order to form the nut with washer shown in FIG. 8, the mounting portion 18 of the nut 16 shown in FIG. 9 is inserted into the hole 6 of the locking washer 1 and the tip (lower end) of the mounting portion 18 is moved outward. The loosening washer 1 is prevented from falling off the mounting portion 18. In this case, the locking washer 1 can slide in the axial direction of the mounting portion 18 and can rotate in the circumferential direction.

To connect two members (a tightening object and a connecting material) using the bolt with the locking washer of FIG. 6 and the nut with the locking washer of FIG. 8, for example, as shown in FIG.
(1) A bolt 19 with a locking washer shown in FIG. 6 is inserted into two tightening objects (connecting materials) 20 and 21 stacked as shown in FIG. 10, and the bolt with the locking washer shown in FIG. The nut 22 is screwed, and the bolt 19 with a locking washer is tightened or the nut 22 with a locking washer is tightened. The bolt 19 and the back of the head of the nut 22 are pressed against the locking washer 1 and compressed. The leg 7 of the locking washer 1 is brought into strong contact with the fastening objects 20 and 21.
(2) Further tightening further compresses the locking washer 1, presses the lower end of the leg 7 against the tightening objects 20 and 21, pushes and opens the leg 7 in the outer peripheral direction, and restores spring force to the leg 7. The energy is stored and the fastening objects 20 and 21 are securely fixed. At this time, the fitting protrusion 4 is pushed inward to fit into the fitting receiving portion 15 of the bolt 19 with the locking washer and the nut 22 with the locking washer, and the rotation of the washer 1 is restricted.
(3) After the fixing, even if a force in the loosening direction (force in the direction opposite to the tightening direction) is applied to the bolt 19 with the locking washer and the nut 22 with the locking washer due to vibration or the like, the energy was accumulated in the locking washer 1. In addition to the restoring spring force, reverse rotation is prevented by the friction force generated by fitting the fitting protrusion 4 to the fitting receiving portion 15 and pressing the plurality of legs 7 against the fastening objects 20 and 21, thereby preventing loosening. The loosening of the bolt 19 with a washer and the nut 22 with a locking washer is prevented.

(Other embodiments of the locking washer)
The locking washer of the present invention is not limited to the case where it is used as the bolt 19 with the locking washer and the nut 22 with the locking washer by attaching it to the back side of the head of screws such as bolts and nuts as described above. Naturally, it can be used by being set on a screw such as a bolt or a nut at the time of use as in the case of the washer.

  The loosening washer of the present invention is not limited to a combination of bolts and nuts, but can also be used in combination with an arbitrary kite such as a golf shoe kite, an athletic competition spike kite, or a soccer shoe kite. Moreover, it is not restricted to a cage | basket, It can attach and use for other arbitrary screws, such as a screw. In addition, the screws with a locking washer according to the present invention can be assembled not only to bolts and nuts, but also to the back side of the various scissors described above. In addition, the screw with a locking washer and the locking washer according to the present invention should be used in all industrial fields such as civil engineering, construction material connection, construction of civil engineering machinery, construction machinery, transport machinery, power transmission equipment, etc. Is possible.

The perspective view which shows an example of embodiment of the locking stopper washer of this invention. The perspective view at the time of compression of the locking stopper washer of FIG. Sectional drawing which shows the locking stopper washer shown in FIG. The perspective view which shows other embodiment of the locking stopper washer of this invention. Sectional drawing of the locking washer of FIG. The front view of the partial longitudinal section which shows an example of embodiment of the screw with a locking stopper washer (bolt with a locking stopper washer) of this invention. Explanatory drawing of attachment of a locking washer to a bolt before thread roll rolling. The front view of the partial longitudinal section which shows an example of embodiment of the screw with a locking stopper washer (nut with a locking stopper washer) of this invention. Installation explanatory drawing of the locking washer to the nut. Explanatory drawing in the case of connecting a fastening object using the bolt with a locking washer and a nut with a locking washer of the present invention. The use explanatory drawing of the bolt with a locking stopper washer of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Locking washer 2 Washer 3 Upper part of washer 4 Fitting protrusion 5 Side surface (outer peripheral surface) of washer
6 Washer hole 7 Leg 8 Hole inner peripheral surface 9 Notch 10 Slit 11 Bolt 12 Bolt head 13 Bolt rod 14 Bolt rod root portion 15 Fitting receiving portion 16 Nut 17 Nut head 18 Nut mounting portion 19 Bolts with lock-off washers 20, 21 Objects to be tightened 22 Nuts with lock-off washers

Claims (5)

  In the washer that can be set or attached to the back side of the head of the screw, two or more legs are formed in the circumferential direction of the bottom of the tubular or umbrella-shaped washer, and these legs are tightened by tightening the screws. A loose washer that compresses when pressed and accumulates the restoring spring force.   In the washer that can be set or attached to the back side of the head of the screw, a fitting protrusion is formed at the upper edge of the hole of the washer formed in a cylindrical shape or an umbrella shape. A loosening washer which is pushed inward by being tightened and fitted into a fitting receiving portion of a screw to restrict the rotation of a nut or a bolt.   In the washer that can be set or attached to the back side of the head of the screw, two or more legs are formed in the circumferential direction of the bottom of the tubular or umbrella-shaped washer, and a fitting protrusion is formed at the upper edge of the hole of the washer When the leg is pressed against the object to be tightened by tightening the screws, the leg is compressed and the restoring spring force is accumulated, and when the washer is pressed by tightening the screws, the fitting protrusion is pushed inward and the screw A locking washer that is fitted in a fitting receiving portion of the same type to restrict the rotation of a nut or bolt.   A loosening prevention washer for a screw according to any one of claims 1 to 3, which is slidably and rotatably mounted on the back side of the head of the screw so as not to fall off. Screws with washers. The screw locking washer according to claim 2 or claim 3 is mounted on the back side of the screw so that it can be slid and rotated and does not fall off, and the screw locking washer is fitted on the back side of the screw. A screw with a locking washer, wherein a fitting receiving portion into which a mating protrusion is fitted is formed.

Images