JP2016223523A - Washer and nut with washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nut easy to caulk and tighten.SOLUTION: A washer of the present invention is set under the head of a nut and has an insertion hole which passes through the front surface and the back surface of a washer base plate. The insertion hole has the size of allowing insertion of a caulking tube which is provided protruding from the head of the nut. In the back surface of the washer base plate and in the outer periphery of the insertion hole, a recess is formed in a ring shape which is recessed by one step from the back surface. The recess opens in the back surface of the washer base plate and has the width and depth capable of receiving a caulked portion of the caulking tube which is inserted in the insertion hole. In a nut with the washer of the present invention, the washer is installed slidably in the axial direction of the caulking tube by putting the washer on the caulking tube which is provided protruding on the head back surface of the nut and by caulking the washer at the tip portion of the caulking tube.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a washer set on the back side of a nut head and a nut with a washer provided with the washer.

  Conventionally, as a washer or a screw with a washer having a locking mechanism, there is a washer or a screw with a washer previously filed by the present applicant (Patent Document 1). These washers are provided with radial washer projections on the front surface (upper surface) in a radial manner and biting projections at several locations in the circumferential direction on the back surface (bottom surface). When these washers are set on the back side of the screw head and tighten the screw, the head protrusion provided on the back of the screw head engages with the washer protrusion, the washer is tightened, and the biting protrusion is tightened. In order to prevent the screws from loosening.

JP 2006-242324 A

  The screw with a washer of Patent Document 1 has an advantage that when the screw is tightened, the head protrusion of the screw meshes with the washer protrusion of the washer, so that the tightening is ensured and the screw is difficult to loosen.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a washer that is difficult to loosen and a nut with a washer provided with the washer.

  The washer of the present invention is a washer that is set under the head of the nut, and has insertion holes that penetrate the front and back surfaces of the washer substrate, and the insertion hole is a caulking cylinder that protrudes from the head of the nut. The hole has a diameter that can be inserted, and is formed on the back surface of the washer substrate, and a recess is formed on the outer periphery of the insertion hole. The recess is open on the back surface of the washer substrate, and is inserted into the insertion hole. The width and depth (collectively referred to as “size”: the same shall apply hereinafter) that can accommodate the crimped portion of the crimped tube.

  In the washer, the concave portion can be provided in a ring shape on the entire outer periphery of the insertion hole or partially at two or more locations on the outer periphery. The upper surface of the concave portion can be a flat surface or an upward inclined surface from the insertion hole side toward the outside.

  The washer may have a surface protrusion (washer surface protrusion) on the surface of the washer substrate and a back protrusion (washer back surface protrusion) on the back surface.

  In the washer, a plurality of washer surface protrusions are provided at several positions in the circumferential direction on the surface of the washer substrate at intervals, and a portion without the washer surface protrusion is defined as a non-projection portion, and the back surface of the washer substrate A washer back projection can be provided at a location corresponding to the projection.

  The washer surface protrusions are chevron-shaped ridges formed radially on the entire circumference or part of the surface of the washer substrate, and the washer back protrusions can be protrusions that can bite or press into the connecting material.

  The nut with a washer according to the present invention is a nut with a washer attached so that the washer does not fall off on the back side of the nut, and the washer described above is used for the washer, and the nut is a caulking tube on the back side of the head. The caulking tube is inserted into the insertion hole of the washer, the tip of the caulking tube protrudes beyond the insertion hole, and the washer is caulked with the protruding tip. Is attached so as to be slidable in the axial direction of the caulking tube.

  The nut with a washer is set by placing one or more washers on the back side of the head of the nut, and in the case of one sheet, the washer is at least the lowest washer (hereinafter, “ "Washer" is a washer with a recess, and when the caulking tube of the nut is inserted into the insertion hole of the set washer and the tip is one piece, the washer, and for two or more pieces, the washer The set one or two washers are attached so as to be slidable in the axial direction of the caulking cylinder by projecting to the tip of the insertion hole and caulking the washer in the recess. Also good.

  In the nut with washer, an upper washer surface protrusion provided on the surface of an upper washer (hereinafter referred to as “upper washer”) and a head rear surface protrusion provided on the back surface of the nut head are mutually connected by tightening the nut. The upper washer back projection and the lower washer lower projection are fitted together by tightening the nut to prevent loosening, and the lower washer lower washer The back projection can be bitten into the connected object by tightening the nut or can be pressed.

The washer of the present invention has the following effects.
(1) Since the washer substrate has a recess, the crimped portion of the crimping tube can be accommodated.
(2) When the concave portion is sized so that the crimping portion does not protrude outward from the opening, the crimping portion does not protrude outward from the back surface of the head of the nut. The back surface of the washer easily comes into surface contact with the connected object connected by the bolt and the nut, and the tightening is ensured.
(3) Since the back face protrusion of the washer can bite into or can be pressed into the connected object by tightening the nut, the tightening of the nut to the connecting material is ensured by tightening the nut, and the tightened screw is not easily loosened.

The nut with washer of the present invention has the following effects.
(1) Since the washer is attached to the back side of the head of the nut, there is no trouble of setting the washer on the back side of the nut at the time of use. Also, never forget the washer set.
(2) Since the washer is slidably attached to the back side of the head of the nut, it is easy to tighten the nut.
(3) If the concave portion is sized so that the crimping portion does not protrude outward from the back surface of the nut, the crimping portion does not get in the way when the nut is tightened, and the back surface of the washer is easy to come into surface contact with the connecting material. Is certain.
(4) At least two washers are attached to the back side of the head of the nut, and the upper washer surface protrusion and the head back surface protrusion are fitted to each other, and the upper washer back surface protrusion and the lower washer surface protrusion are engaged with each other. In such a case, double engagement is achieved, and tightening is ensured and is less likely to loosen than single engagement.

1 shows an example of a nut with a washer according to the present invention, where (a) is a side view before assembling the washer to the nut, (b) is a caulking explanatory view, (c) is a side view of the nut with washer, (d ) Is a plan view of the back surface of the head of the nut, (e) is a plan view of the washer surface, and (f) is a plan view of the back surface of the washer. The other example of the nut with a washer of this invention is shown, Comprising: (a) is a partial cross section before assembling the washer to the nut, and is an explanatory view in the case where the upper surface of the concave part is an upslope, (b) is a caulking explanation Figure. It is explanatory drawing of the head back surface protrusion and washer protrusion of the nut in this invention, Comprising: (a) is explanatory drawing in case a ridgeline part is arc surface shape, (b) is the Y section enlarged view of (a), (c) ) Is an explanatory view showing another example of (b), (d) is an explanatory view when the ridge line portion is a plane, (e) is an enlarged view of a Z portion of (d), (f), (g) are (e) ) Is an explanatory view showing another example. It is a nut with a washer of this invention, Comprising: It is an example at the time of providing two washers, (a) is explanatory drawing before assembling a washer to a nut, (b) is a partial cross section of the state which assembled the washer to the nut FIG. 4C is a side view of a nut with a washer in which a washer is assembled to the nut. (A)-(c) is use explanatory drawing of the nut with a washer of FIG.1 (c). (A)-(c) is use explanatory drawing of the nut with a washer of FIG.4 (c).

(Washer embodiment)
An example of the washer of the present invention will be described with reference to FIGS. 1 (a) to 1 (f) and FIGS. 2 (a) and 2 (b). A washer 1 shown in FIGS. 1 (a) to 1 (f) has an insertion hole 3 penetrating through the center of a disc-shaped metal plate (washer substrate) 2, and a recess 4 on the back side of the washer substrate 2. It is formed in a ring shape along the entire outer periphery. A protrusion (washer surface protrusion) 5 is formed on the surface of the washer substrate 2, and a protrusion (washer back surface protrusion) 6 is formed on the back surface.

  The insertion hole 3 has a hole diameter into which a caulking tube 9 protruding below the head portion 8 of the nut 7 can be inserted.

  The recess 4 is formed in a ring shape on the entire outer periphery of the insertion hole 3. If the entire circumference of the tip 9a of the crimping tube 9 is not caulked, but several places in the circumferential direction of the lower end 9a are caulked, the recess 4 is also provided in a ring shape around the entire circumference of the insertion hole 3. Alternatively, it can be provided only at the outer periphery of the insertion hole 3 and corresponding to the several crimped portions 10.

  The recesses 4 shown in FIGS. 1 (a) and 1 (b) have the same depth and the upper surface 4a is a flat surface, but the recesses 4 are formed from the insertion hole 3 side as shown in FIGS. 2 (a) and 2 (b). An upward slope (tapered surface) can be formed toward the outside.

  Each of the recesses 4 has such a width and depth (size) that the caulking portion 10 (FIG. 1B) does not protrude outward from the back surface 2b of the washer substrate 2 (FIG. 1B). The recess 4 is easy to caulk, and the shape, depth, etc. are not particularly limited as long as the caulking part 10 can be accommodated.

  The washer surface protrusions 5 are mountain-shaped protrusions, and as shown in FIG. 1 (e), a large number of radial protrusions are formed between the insertion hole 3 and the outer peripheral edge 2a of the washer substrate 2, and protrude in four places in the circumferential direction. The no-projection part 11 without a gap is formed.

  Each of the washer surface protrusions 5 includes a climbing slope 12, a locking surface 13, and a ridge line portion 14, as shown in FIGS. 3 (a) and 3 (d). The climbing slope 12 is formed in front of the ridge line portion 14 in the tightening rotation direction, and the ridge line portion 14 is formed at the intersection (mountain peak) of the climbing slope 12 and the locking surface 13. The shape engages with the head back surface protrusion 15. Further, the nut 7 can be easily tightened (rotated in the tightening direction) by loosening the inclination angle of the overpass slope 12 and making the inclination angle of the locking surface 13 steeper than the inclination angle of the overturn slope 12. In the opposite direction, it is difficult to loosen. In this case, the top part of the ridge line part 14 can be formed into an arcuate shape as shown in FIGS. 3A to 3C, or can be made flat as shown in FIGS. 3D to 3G. By making it arcuate or planar, the ridge line portion 14 is less likely to be lost when engaged, and the ridge line portion forming portion of the press die is less likely to be lost during molding of the washer surface projection 5 so that it can be held (long-lasting). become.

  The arc surface shape, radius R, etc. of the ridge line portion 14 can be arbitrarily designed. As an example, the arc surface of the ridge line portion 14 shown in FIGS. 3A and 3B has an arcuate surface 13 from the top of the ridge line portion 14 to the axis XX of the base portion of the washer surface protrusion 5. The arc surface of the ridge line portion 14 in FIG. 3C has an arc shape only at the top of the ridge line portion 14, and a locking surface 13 from the arc lower end portion of the top portion to the axis XX of the base portion of the washer surface protrusion 5 is formed. It is straight.

  The planar shape, length, and the like of the ridge line portion 14 can be arbitrarily designed. As an example, the plane of the ridge line portion 14 shown in FIGS. 3D and 3E is parallel to the axis XX of the base portion of the washer surface protrusion 5, and the locking surface 13 from the lower end of the plane to the axis XX. Is linear. The plane of the ridge line portion 14 in FIG. 3 (f) is a slope inclined downward from the top of the ridge line portion 14 toward the axis XX, and the locking surface 13 from the lower end of the plane to the axis XX is formed. It has an arc shape. In the plane of the ridge line portion 14 in FIG. 3G, the top of the ridge line portion 14 is a plane parallel to the axis XX, and the locking surface 13 from the lower end of the plane to the axis XX is formed in an arc shape. is there.

  Since it may be inconvenient if the engagement between the washer surface protrusion 5 and the head back protrusion 15 of the nut 7 which are engaged by tightening the nut 7 is not loosened at all, it is more steep than the slope 12 over the locking surface 13. However, by making the angle gentler than 90 degrees, and by making the tops of the locking surface 13 and the ridge line portion 14 arc-shaped or flat as described above, the force is the same as or slightly stronger than the tightening force. It is desirable that when the nut 7 is rotated in the reverse direction, the engagement is restored and the tightening can be loosened.

  The head back surface protrusion 15 has a shape that meshes with the washer surface protrusion 5, and includes a climbing slope 12, a locking surface 13, and a ridge line portion 14, similar to the washer surface protrusion 5.

  Projection size of washer surface protrusion 5, head back surface protrusion 15, inclination angle of climbing slope 12, inclination angle of locking surface 13, arc surface radius R when ridge line portion 14 is arc surface, plane when plane surface is flat The width and the like are the size (radius) of the washer 1, the thickness T of the washer 1 (FIGS. 3A and 3D), the height H of the washer surface protrusion 5 and the head back protrusion 15 (FIG. 3A). d)) and can be designed as appropriate according to other conditions. In order to loosen the meshing between the washer surface protrusion 5 and the head back surface protrusion 15 with a return force exceeding a predetermined value, the inclination angle (gradient) θ1 of the climbing slope 12 is about 10 to 60 degrees. The inclination angle θ2 of the stop surface 13 is preferably 50 degrees or more and less than 90 degrees, and the arc surface radius R of the ridge line portion 14 is preferably about 0.2 to 0.5 mm.

  As shown in FIG. 1 (f), the washer back projection 6 is formed on the back surface 2 b of the washer substrate 2 at locations corresponding to the non-projecting portion 11 (four locations in FIG. 1 (f)). The washer back projection 6 is capable of biting into or being press-contacted to the connected object A (FIGS. 5C and 6C). The washer back surface protrusion 6 in FIG. 1 (f) is formed by pressing the back surface 2b of the washer substrate 2 so as to protrude outside the back surface 2b. Part) 16 is formed. The washer back projection 6 has a shape and hardness that can bite into the connector A. The recessed portion 16 can bite (enter) the meat (extruded meat) of the back surface 2b of the washer substrate 2 that is pushed out by the washer back surface protrusion 6 biting into the connector A.

(Embodiment 1 of nut with washer)
A nut 20 with a washer (FIG. 1C) according to the present invention is obtained by attaching the washer 1 to a nut 7. The nut 7 has a caulking tube 9 protruding from the back surface of the head 8. The head 8 is hexagonal like a general-purpose nut, and a screw hole for screwing a bolt is formed at the center of the head 8. A lower end portion 8a of the head 8 is formed in a taper that spreads at the bottom, a caulking tube 9 is projected from the center of the back surface of the taper portion, and a head back surface protrusion 15 is formed on the outer periphery of the root portion of the caulking tube 9. Yes. As shown in FIG. 1D, a large number of head back surface protrusions 15 are radially formed between the screw hole 8b and the outer peripheral edge of the lower end portion 8a. The head back surface protrusion 15 has a shape that meshes with the washer surface protrusion 5, and includes a climbing slope 12, a locking surface 13, and a ridge line portion 14, similar to the washer surface protrusion 5. The head 8 may have other number of corners, shape and structure.

  The head back surface protrusion 15 and the washer surface protrusion 5 are engaged with each other, are easy to tighten, are not easily loosened, and are loosened by a return force of a predetermined level or more. The inclination angle θ2 of 13 and the arc surface radius R of the ridge portion 14 are preferably set to the same (substantially the same) values as those of the washer surface protrusion 5.

  The nut 20 with a washer according to the present invention inserts the caulking cylinder 9 into the insertion hole 3 of the washer 1 according to the present invention (FIG. 1A), sets the washer 1 at the root of the caulking cylinder 9, and As shown in FIG. 1B, the distal end side 9 a of the caulking cylinder 9 protruding into the recess 4 is expanded outward (expanded) or folded back (folded), and the washer 1 is caulked to the nut 7. It is. By staking, the washer 1 is attached to the nut 7 so as to be rotatable around the staking tube 9 and slidable in the axial direction of the staking tube 9 so as not to fall out of the staking tube 9. The bent portion (crimped portion) 10 of the crimping tube 9 is accommodated in the recess 4 of the washer 1 so as not to protrude outside the recess 4 (outside the bottom surface of the sub metal).

(Embodiment 2 of nut with washer)
Embodiment 1 of the nut with a washer is a case where one washer is attached to one nut, but the nut with a washer of the present invention can be attached to two or more washers to one nut. In the embodiment shown in FIGS. 4A to 4C, two washers 1 are attached.

  The nut 7 of the washer-provided nut 20 shown in FIG. 4 (a) has the same structure as the nut 7 of FIG. 1 (a), and the difference is that the crimping tube 9 is longer than that in FIG. 1 (a). . 4 (a) to 4 (c), the upper washer 21 and the lower washer 1 are stacked on the caulking tube 9 and set in the caulking tube 9, and the tip 9a of the caulking tube 9 is expanded or folded to fold the lower washer 1. The upper washer 21 and the lower washer 1 are attached to the caulking tube 9 so as to be slidable in the axial direction so as not to come off.

  Of the two washers shown in FIGS. 4B and 4C, the lower washer 1 has a recess 4 and is the same as the washer 1 shown in FIG. 1B, but the upper washer 21 is the washer 1 described above. And a different structure. Specifically, the concave portion 4 is not provided, and the upper washer surface protrusion 22 of the chevron ridge is provided on the surface of the washer substrate 2, and the upper washer rear surface protrusion 23 of the chevron ridge is provided on the back surface. The upper washer surface protrusion 22 meshes with the head rear surface protrusion 15 of the nut 7, and the upper washer rear surface protrusion 23 meshes with the washer surface protrusion 5 of the lower washer 1. Therefore, the upper washer surface protrusion 22 and the upper washer rear surface protrusion 23 are provided with a climbing slope 12, a locking surface 13, and a ridge line portion 14, similar to the washer surface protrusion 5 and head back surface protrusion 15. The top portion is formed in an arc shape or a horizontal plane, and the inclination angles thereof are the same as the inclination angles of the washer surface protrusion 5 and the head back surface protrusion 15.

[Usage example 1 of nut with washer]
To use the nut 20 with a washer in FIG. 1 (c), it can be as shown in FIGS. 5 (a) to 5 (c). The bolt 30 with the washer in FIG. 5B is inserted into the holes of the two plate members (connected objects) A and B to be connected, and the bolt shaft 33 of the bolt 30 with the washer protruding from the connected object B is connected to the bolt shaft 33 of FIG. ) And the nut 20 with a washer is screwed from the bottom of the connector B and tightened. By this tightening, the head back projection 15 of the nut 7 and the washer surface projection 5 of the washer 1 are engaged with each other, the washer 1 is pressed against the connection object B, the washer back protrusion 6 bites into the connection object B, and the nut 7 is careless. It becomes difficult to loosen.

[Use example 2 of nut with washer]
In order to use the nut 20 with a washer in FIG. 4C, it can be as shown in FIGS. The bolt 30 with the washer in FIG. 6B is inserted into the holes of the two plate members (connections) A and B to be connected to the bolt shaft 33 of the bolt 30 with the washer protruding from the connection B, as shown in FIG. ) And the nut 20 with a washer is screwed from the bottom of the connector B and tightened. In this case, the head back protrusion 15 of the nut 7 and the washer surface protrusion 5 of the upper washer 1 are engaged, the upper washer back protrusion 23 and the washer surface protrusion 5 of the lower washer 1 are engaged, and the washer back protrusion 6 of the lower washer 1 is engaged. Since it bites into the connection thing B, it becomes a double lock | rock and the nut 7 becomes much more difficult to loosen.

  In the bolt 30 with a washer in FIG. 5B, a single screw washer 34 is placed on a bolt shaft (without a thread) 33 protruding from the head portion 32 of the bolt, and then a screw thread 35 is provided on the outer peripheral surface of the bolt shaft 33. A threaded bolt shaft 36 is formed to prevent the washer 34 from falling off the threaded bolt shaft 36. A washer 34 is attached to the base of a bolt shaft 33 without a thread. The washer 34 can rotate around the bolt shaft 33 and can slide in the axial direction of the bolt shaft 33.

  In the bolt 30 with a washer shown in FIG. 6B, the two screw washers 34 are put on the bolt shaft 33 (no screw thread) projecting from the bolt head 32, and then the screw thread 35 is put on the outer peripheral surface of the bolt shaft 33. The threaded bolt shaft 36 is formed so that the washer 34 does not fall out of the threaded bolt shaft 36. Two washers 34 are attached to the base of the bolt shaft 33 without threads. The washer 34 can rotate around the bolt shaft 33 and can slide in the axial direction of the bolt shaft 33.

  The nut 20 with a washer in FIGS. 1 (c) and 4 (c) can be used by being screwed into another bolt. The washer back projection 6 may be anything as long as it can bite into or be brought into pressure contact with the connected articles A and B. In the case of a material that is easily damaged by the connected objects A and B, it is desirable that the protrusions are made of rubber or resin so that they are not easily damaged and are not slippery even when pressed. When the materials of the connected objects A and B are hard, spike-like protrusions of hard material can be used. Further, it may be an elastic spring or the like. These protrusions can be embedded in the back face of the washer or can be bonded and fixed. The number of seat back protrusions, the installation location, and the like can be appropriately designed according to the application.

1 washer (in case of 2 sheets: lower washer)
2 Washer board 2a Outer peripheral edge 2b (of the washer board) Back surface 3 Insert hole 4 Recess 4a Top surface of the recess 5 Washer surface protrusion 6 Washer back protrusion 7 Nut 8 (Nut) head 8a (Head ) Lower end 8b (Head) screw hole 9 Caulking cylinder 9a (Caulking cylinder) tip 10 Caulking part 11 Non-protruding part 12 Overhead slope 13 Locking surface 14 Ridge part 15 Head back protrusion 16 (of nut) Recessed part 20 Nut with washer 21 Upper washer 22 Upper washer surface protrusion 23 Upper washer back protrusion 30 Washer bolt 32 Head of bolt (bolt) 33 Bolt shaft (no thread)
34 (bolt) washer 35 (bolt shaft) thread 36 threaded bolt shaft A (lower) connection B (upper) connection

Claims (9)

A washer set under the head of the nut,
There are insertion holes penetrating the front and back surfaces of the washer substrate, and the insertion hole is a hole diameter into which a caulking tube protruding from the head of the nut can be inserted,
A recess that is one step lower than the back surface is formed on the outer periphery of the insertion hole on the back surface of the washer substrate,
The recess has an opening on the back surface of the washer substrate, and has a width and depth that can be inserted into the insertion hole and accommodate the crimped portion of the crimping cylinder.
A washer characterized by that. The washer according to claim 1,
The concave portion is provided in a ring shape on the entire outer periphery of the insertion hole, or partially provided at two or more locations on the outer periphery.
A washer characterized by that. In the washer according to claim 1 or claim 2,
The upper surface of the recess is an upward inclined surface from the insertion hole side toward the outside.
A washer characterized by that. In the washer according to any one of claims 1 to 3,
A washer surface protrusion was provided on the surface of the washer substrate, and a washer back protrusion was provided on the back surface of the washer substrate.
A washer characterized by that. The washer according to claim 4,
Several washer surface protrusions are provided at several intervals in the circumferential direction on the surface, and the parts without the washer surface protrusions are defined as non-projection parts.
A washer back surface protrusion was provided at a position corresponding to the non-projection part on the back surface of the washer substrate.
A washer characterized by that. In the washer of claim 4 or claim 5,
The washer surface protrusion is a chevron-shaped protrusion formed radially on the entire circumference or part of the surface in the circumferential direction, and the washer back protrusion is a protrusion that can bite or press into the connecting material.
A washer characterized by that. A nut with a washer attached so that the washer does not fall off on the back side of the head of the nut,
The washer according to any one of claims 1 to 6 is used for the washer,
The nut has a caulking cylinder projecting from the back of the head. The caulking cylinder is inserted into the washer insertion hole, and the tip of the caulking cylinder protrudes beyond the insertion hole. And the washer is slidably mounted in the axial direction of the caulking cylinder,
A nut with a washer characterized by that. The nut with washer according to claim 7,
Two washers are attached on the back side of the head of the nut, and at least the lower washer is a washer with a recess. The caulking tube of the nut is inserted into the insertion hole of the two washers, and the tip is the insertion hole of the lower washer. Projecting forward, the projecting tip portion caulked the washer in the recess, and the two washers were attached to be slidable in the axial direction of the caulking cylinder,
A nut with a washer characterized by that. The nut with washer according to claim 8,
The top washer surface protrusion provided on the top washer surface and the head back protrusion provided on the back surface of the nut head are fitted to each other by tightening the nut to prevent loosening. The upper washer back projection and the lower washer lower projection on the lower washer are fitted to each other by tightening the nut to prevent loosening, and the lower washer back projection on the lower washer can bite into the connected object by tightening the nut. It can be pressed.
A nut with a washer characterized by that.

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