JP3864278B2 - Rubber washer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rubber washer used for tightening a battledore bolt, an anchor bolt, and other bolts.
[0002]
[Prior art]
Conventionally, when tightening the wing plate bolts, anchor bolts, and other bolts used for wooden buildings, the metal washer has been used to prevent loosening of the metal fittings due to dry wood and to absorb various vibrations. A rubber washer with a rubber plate abuttingly fixed is used.
[0003]
[Problems to be solved by the invention]
When fastening structural members using bolts, proper tightening torque management is indispensable in order to prevent excessive tightening that causes damage to the fastened object, bolts and nuts.
[0004]
Even when the conventional rubber washer is used, an excessive tightening torque also impairs the characteristics of the rubber and is not preferable. Therefore, it is necessary to perform a bolt tightening operation using a torque wrench.
[0005]
However, it is troublesome to check the tightening torque every time the bolt is tightened, and there is a problem that the work efficiency is deteriorated.
[0006]
[Means for Solving the Problems]
The present invention solves the above-mentioned problems by providing a stopper that prevents the tightening torque from being applied to the seat plate constituting the rubber washer when it is fastened with a bolt and coming into contact with an object to be fastened.
[0007]
That is, the present invention relates to a rubber washer in which a rubber plate for bolt loosening prevention having a bolt hole provided in the center is abutted and fixed to a lower part of a seat plate made of a disk having a bolt hole provided in the center. A stopper at the time of fastening that is bent toward the rubber plate contact side is provided around the rubber plate, a rubber plate latching portion is provided at a peripheral edge of the bolt hole of the seat plate on the rubber plate side, and the rubber plate latching portion is and fitting the engaging groove formed on the periphery of the bolt hole of the rubber plate, Ru with rubber washer der, characterized in that the said rubber plate and the washer was abutment fixed.
[0008]
In the above, the bolt loosening prevention rubber plate is a rubber washer characterized in that an annular groove is provided in the outer peripheral wall .
[0009]
The stopper is in contact with the object to be fastened at the time of bolt tightening, restricts further tightening, and prevents excessive torque from being applied.If the stopper is shortened, the tightening torque increases. The longer the stopper, the smaller the tightening torque.
[0010]
In the manufacturing method, the material removal of the stopper forming portion of the disk is made by measuring the length and width of the stopper forming portion and the diameter of the disk so that the remainder of the metal plate after punching the disk is minimized. Considering this, the stopper forming portion is disposed so as to contact the gap between the disc and the disc.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The rubber washer according to the present invention comprises a rubber washer in which a bolt loosening prevention rubber plate is in contact with and fixed to a lower part of the seat plate, and a stopper for fastening is provided around the seat plate.
[0012]
The rubber plate prevents the bolts from loosening due to wood drying due to drying of the wood, and absorbs vibrations due to earthquakes and the like. The rubber plate is provided with a bolt hole, and a seat plate latching groove is provided at the periphery of the bolt hole, and a rubber plate latching portion press-formed at the lower portion of the seat plate is latched in the latch groove. Thus, the seat plate and the rubber plate are contacted and fixed.
[0013]
The stopper may be in contact with the object to be fastened at the time of fastening, and may be one or two. However, if one or two stoppers are used, three or more stoppers are provided because stability in contact with the object to be fastened is not good. In some cases, the stopper can be used as a stopper over the entire circumference of the seat plate. However, the material can be removed without waste, and the number of the stoppers can be set to 3 or 4 in consideration of the stability in the state of contact with the object to be fastened. preferable.
[0014]
The width of the stopper may be any width as long as it can secure a strength that does not cause damage even if excessive torque is applied during bolt tightening. It is determined appropriately according to the desired tightening torque within a range that does not protrude from the contact surface.
[0015]
The bolt loosening prevention rubber plate is preferably provided with an annular groove on the outer peripheral wall. The rubber plate is compressed and deformed when the bolt is tightened. However, by providing an annular groove on the outer peripheral wall, the annular groove can be used as a clearance for expansion during compression.
[0016]
According to the manufacturing method of the present invention, a disc having a bolt hole in the center and having a stopper forming portion in the periphery is punched out from a metal plate, and then a rubber plate latching portion is pressurized to one side peripheral portion of the bolt hole. At the same time as molding, the stopper forming part is bent toward the rubber plate contact side to form a stopper, and then the rubber plate is fitted to the rubber plate latching part to fix the disk and rubber plate in contact Process.
[0017]
The rubber plate latching portion that is pressure-molded on one side peripheral edge of the bolt hole has a diameter slightly smaller than the final diameter of the bolt hole when the disc is punched from the metal plate, After punching out the plate, the rubber plate latching portion is used for the diameter expansion to the final diameter, and pressure molding is performed.
[0018]
If the connecting portion between the stopper forming portion and the disk is narrowed, it is easy to bend the stopper forming portion toward the rubber plate contact side to form the stopper.
[0019]
In the manufacturing method, the material of the stopper forming portion of the disk can be applied to the gap between the disk and the disk.
[0020]
For example, when the number of stoppers is three per seat plate, the material removal in the metal plate 22 is the first disc so that one side 22a of the metal plate 22 is tangent as shown in FIG. 24 and the second disk 25 are arranged. The first disc 24 is provided with a first stopper forming portion 24a in the first disc 24 in a direction perpendicular to one side 22a of the metal plate 22 and toward the other side 22b of the metal plate 22. The second stopper forming portion 24b and the third stopper forming in the first disc 24 are arranged in a direction that forms α = 120 ° and β = 120 ° from the direction perpendicular to the side 22a of the metal plate 22, respectively. The part 24c is continuously provided.
[0021]
The second disc 25 is provided with a first stopper forming portion 25a, a second stopper forming portion 25b, and a third stopper forming portion 25c similar to the first disc 24.
[0022]
In the first disc 24 and the second disc 25, the third stopper forming portion 24c in the first disc 24 and the second stopper forming portion 25b in the second disc 25 do not interfere with each other. Place them at intervals.
[0023]
The first stopper forming portion 23 a, the second stopper forming portion 23 b, and the third stopper forming portion 23 c in the third disc 23 are provided on the third disc 23 in the same manner as the first disc 24. The third disc 23 is arranged so that the first stopper forming portion 23a of the third disc 23 is positioned between the first disc 24 and the second disc 25. The first disk 24 and the second disk 25 are arranged as close as possible.
[0024]
The other side 22 b of the metal plate is a side parallel to one side 22 a of the metal plate, which is a tangent to the first disc 24 and the second disc 25, and is a tangent to the third disc 23.
[0025]
The disks after the fourth disk 26 are sequentially and repeatedly arranged in the longitudinal direction of the metal plate 22.
[0026]
By arranging the discs in this way, the distance between the one side 22a and the other side 22b of the metal plate 22 can be narrowed, the waste of material can be reduced, and the material can be efficiently taken.
[0027]
If the metal plate is wide, the arrangement of the two rows of discs shown in FIG. 8 is used as the basic unit 27, and the basic unit 27 is arranged in the width direction of the metal plate, even during mass production. Efficient material removal can be realized.
[0028]
[Example 1]
An embodiment of the rubber washer according to the present invention will be described with reference to FIGS.
[0029]
The rubber washer 1 is configured such that a bolt loosening prevention rubber plate 3 is abutted and fixed to a lower portion of the seat plate 2, and stoppers 4, 5, and 6 are provided around the seat plate 2 at the time of fastening. An annular groove 7 is provided on the outer peripheral wall of the relaxation preventing rubber plate 3.
[0030]
The seat plate 2 is a circular plate having a diameter of 45 mm and a thickness of 4.5 mm made of a hot rolled mild steel plate (JIS-G3131), and a bolt hole 8 having a diameter of 13 mm is provided in the center. A rubber plate latching portion 9 is provided on the peripheral portion of one side of the bolt hole (the rubber plate 3 contact side).
[0031]
Further, stoppers 4, 5, 6 are provided around the seat plate 2 at 120 ° intervals, and the stoppers 4, 5, 6 are bent toward the rubber plate 3 contact side. The dimensions of the stoppers 4, 5, 6 at the time of punching are a width of 6 mm and a length of 10 mm, respectively.
[0032]
The surface of the seat plate 2 is electrogalvanized.
[0033]
The bolt loosening prevention rubber plate 3 is made of natural rubber and has a thickness of 12 mm. The annular groove 7 provided in the outer peripheral wall has a width of about 5 mm and a depth of about 2 mm. A bolt hole 10 is provided at the center, and a latching groove 11 (FIG. 10) for latching the seat plate 2 is provided at the periphery of the bolt hole 10.
[0034]
The seat plate 2 and the bolt loosening prevention rubber 3 are contacted and fixed by fitting the retaining groove 11 into the rubber plate retaining portion 9.
[0035]
An example in which the rubber washer 1 thus configured is used for fastening the members 13 and 14 using the battledore bolts 12 will be described with reference to FIGS.
[0036]
FIG. 5 shows a state in which the rubber washer 1 is inserted into the bolt 15 and the nut 16 is screwed, but is not yet tightened.
[0037]
Therefore, the rubber plate 3 is not compressed, and the stoppers 4, 5, 6 are not in contact with the member 13.
[0038]
The bolt is tightened from the state shown in FIG. 5, but when using a rubber washer that does not have a stopper, a torque wrench is usually used so that the tightening torque is about 4,000 Nm. Tightening must be done.
[0039]
However, since the rubber washer 1 is used, it is not necessary to perform tightening while adjusting the tightening torque, and if tightening is performed until the stoppers 4, 5, 6 contact the member 13 (FIG. 4B). It will be good.
[0040]
That is, when the stoppers 4, 5, and 6 come into contact with the member 13, further tightening cannot be performed, and the tightening torque is about 4,000 Nm. It will be completed. At this time, the rubber plate 3 is compressed and its thickness is about 6 mm.
[0041]
Even if wood thinning or the like due to drying of the wood occurs after tightening, the restoring force of the rubber plate can prevent the bolt from loosening and can absorb vibration due to an earthquake or the like.
[0042]
In this embodiment, the dimensions of the stoppers 4, 5, and 6 when punched are a width W1 = 6 mm and a length L = 10 mm, respectively (FIG. 8), but the length L is changed according to the required tightening torque. can do.
[0043]
That is, when the required tightening torque is large, if the distance until the stopper comes into contact with the fastening member is increased by shortening the length L of the stopper, the bolt tightening amount is increased and a large tightening torque is given. It will be.
[0044]
On the contrary, when the required tightening torque is small, if the distance until the stopper comes into contact with the fastening member is shortened by increasing the length L of the stopper, the tightening amount of the bolt is reduced and small. Tightening torque will be given.
[0045]
The width W1 (FIG. 8) of the stopper is not limited as long as it can secure a strength that does not break due to contact with the fastening member during tightening.
[0046]
Further, the thickness of the rubber plate can be appropriately changed according to the tightening amount of the bolt and the length L of the stopper.
[0047]
FIG. 6 illustrates another embodiment of the rubber washer according to the present invention.
The rubber washer 17 of this embodiment is different from the rubber washer 1 of the first embodiment in that four stoppers 18, 19 are used instead of the three stoppers 4, 5, 6 (FIG. 2). , 20 and 21 are provided. That is, the stoppers 18, 19, 20, and 21 are provided around the seat plate 2 at intervals of 90 °.
[0049]
The dimensions of the stoppers 18, 19, 20, 21 when punched are 10mm wide and 10mm long, respectively, while the dimensions of the stoppers 4, 5, 6 (Fig. 2) are 6mm wide and 10mm long, respectively. It is 10 mm.
[0050]
The rubber washer 17 in this embodiment is the same as the front rubber washer 1 in the other configuration, usage, and the like, and the description thereof will be omitted.
[0051]
[Example 2]
An embodiment of the method for manufacturing a rubber washer according to the present invention will be described with reference to FIGS.
[0052]
In this embodiment, a method for manufacturing the rubber washer 1 (FIG. 2) in the first embodiment having three stoppers will be described.
[0053]
First, a circular plate 23 having a bolt hole 8 at the center and having stopper forming portions 23a, 23b, 23c around the metal plate 22 is punched out.
[0054]
Next, a rubber plate latching portion 9 (FIG. 3) is pressure-formed at one peripheral edge of the bolt hole 8, and the stopper forming portions 23a, 23b, 23c are bent toward the rubber plate 3 abutting side to stop the stopper. 4, 5, 6 are formed.
[0055]
Next, the rubber plate 3 is fitted into the rubber plate latching portion 9 (FIG. 3), and the disk 23 and the rubber plate 3 are contacted and fixed.
[0056]
In the manufacturing method including the above steps, the material removal of the stopper forming portion 23a of the disk 23 applies a gap between another disk and another disk.
[0057]
Hereinafter, for convenience of explanation, the disc 23 is referred to as a third disc 23, and the stopper forming portions 23a, 23b, and 23c are respectively the first stopper forming portion 23a and the second stopper forming portion 23b in the third disc 23. The material removal in the metal plate 22 will be described as the third stopper forming portion 23c.
[0058]
That is, as shown in FIG. 8, the first disc 24 and the second disc 25 are arranged so that one side 22 a of the metal plate 22 is tangent to the metal plate 22. The first disc 24 is provided with a first stopper forming portion 24a in the first disc 24 in a direction perpendicular to one side 22a of the metal plate 22 and toward the other side 22b of the metal plate 22. The second stopper forming portion 24b and the third stopper forming in the first disc 24 are arranged in a direction that forms α = 120 ° and β = 120 ° from the direction perpendicular to the side 22a of the metal plate 22, respectively. The part 24c is continuously provided.
[0059]
The second disc 25 is provided with a first stopper forming portion 25a, a second stopper forming portion 25b, and a third stopper forming portion 25c similar to the first disc 24.
[0060]
In the first disc 24 and the second disc 25, the third stopper forming portion 24c in the first disc 24 and the second stopper forming portion 25b in the second disc 25 do not interfere with each other. Place them at intervals. In this embodiment, the diameter of each disk is D = 4.5 mm, the length of each stopper forming portion is L = 10 mm, and each stopper forming portion is separated by 120 ° (= α = β). If the center of the first disc 24 and the center of the second disc 25 are approximately (S1 =) 5.6 mm or more apart, the third stopper in the first disc 24 is provided. The forming portion 24c and the second stopper forming portion 25b in the second disc 25 do not interfere with each other. In this embodiment, S1 = 5.8 mm.
[0061]
The first stopper forming portion 23 a, the second stopper forming portion 23 b, and the third stopper forming portion 23 c in the third disc 23 are provided on the third disc 23 in the same manner as the first disc 24. It is. In the third disc 23, the center line 28 of the first stopper forming portion 23a in the third disc 23 is intermediate between the center of the first disc 24 and the center of the second disc 25, In other words, in this embodiment, the distance between the center of the first disk 24 and the center of the second disk 25 is S1 = 5.8 mm. It is located at a distance of S2 = 2.9 mm from the center, and is placed as close as possible to the first disk 24 and the second disk 25. In this embodiment, the circumference of the third disc 23 and the disc 24, the circumference of the third disc 23, and the circumference of 25 are set at positions separated by S3 = 2 mm.
[0062]
The other side 22 b of the metal plate is a side parallel to one side 22 a of the metal plate, which is a tangent to the first disc 24 and the second disc 25, and is a tangent to the third disc 23.
[0063]
The disks after the fourth disk 26 are sequentially and repeatedly arranged in the longitudinal direction of the metal plate 22.
[0064]
By arranging the discs in this way, the distance between the one side 22a and the other side 22b of the metal plate 22 can be narrowed, the waste of material can be reduced, and the material can be efficiently taken. In this embodiment, the interval between the one side 22a and the other side 22b of the metal plate 22 can be set to approximately W2 = 100 mm.
[0065]
If the metal plate is wide, the arrangement of the two rows of discs shown in FIG. 8 is used as the basic unit 27, and the basic unit 27 is arranged in the width direction of the metal plate, even during mass production. Efficient material removal can be realized.
[0066]
The disk 23 with the material removed in this manner is punched from the metal plate 22, and the other disks are punched simultaneously or continuously.
[0067]
At the same time, the circular hole 23 is punched in the center of the disc 23. However, the diameter of the bolt hole 8 punched at this stage is slightly smaller than the final diameter. This is because when the rubber plate latching portion 9 (FIG. 3) is pressure-formed on one side peripheral edge of the bolt hole 8 in the next process, the expanded diameter to the final hole diameter is reduced to the rubber plate latching portion 9 ( This is for applying pressure molding to FIG.
[0068]
The punched disc 23 is formed by pressing the rubber plate latching portion 9 (FIG. 3) by extruding and applying the expanded diameter to the final hole diameter of the bolt hole 10 as described above. The stopper forming portions 23a, 23b, and 23c are bent toward the rubber plate 3 contact side to form the stoppers 4, 5, and 6, and the seat plate 2 in the first embodiment is integrally formed (FIG. 9).
[0069]
Next, the pre-prepared rubber plate 3 is fitted to the rubber plate hook 9 (FIG. 3), and the disk 23 and the rubber plate 3 are abutted and fixed to produce the rubber washer 1. (FIG. 10).
[0070]
The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments and usage examples, and various forms having the same effects can be obtained.
[0071]
For example, the number of stoppers provided on the seat plate is not limited to three or four, and can be provided over the entire circumference of the seat plate.
[0072]
In the present invention, a stopper is provided around the seat plate. In the above-described embodiment, the rubber plate retaining portion 9 that is press-molded on one side peripheral portion of the bolt hole 8 is further extended to provide a rubber. It can also be a stopper located in the bolt hole of the plate.
[0073]
That is, it is only necessary to provide a stopper that comes into contact with the fastening member during fastening and restricts further fastening.
[0074]
The material of the seat plate and the rubber plate is not limited to the above-described embodiment. For example, the rubber plate is a synthetic rubber other than natural rubber, as long as it has a restoring force capable of preventing loosening of the bolt, It can also be a synthetic resin.
[0075]
The shape and dimensions of the seat plate and the rubber plate can also be adapted to the place of use and application. For example, a square washer may be used.
[0076]
Moreover, the material removal of the disc in a metal plate can be made into the arrangement | positioning of the disc which has the space | interval which considered the distortion | strain etc. of the metal plate at the time of stamping according to the kind etc. of a metal plate.
[0077]
【The invention's effect】
According to the present invention, the rubber washer has a stopper that comes into contact with the fastening member at the time of tightening. Therefore, when the stopper comes into contact with the fastening member, further tightening is restricted, and the tightening torque is not visually controlled There is an effect that a tightening operation with a desired tightening torque can be completed.
[0078]
Moreover, in the manufacturing method of a rubber washer, since the material removal of the stopper formation part of a seat plate has applied the clearance part of a disc and a disc, there exists an effect which can utilize a material without waste.
[Brief description of the drawings]
FIG. 1 is a perspective view of a rubber seat plate according to an embodiment of the present invention.
FIG. 2A is a side view of the same.
(B) The same top view.
(C) Similarly bottom view.
3A is a side view of a seat plate constituting a rubber seat plate according to an embodiment of the present invention. FIG.
(B) The same top view.
(C) Similarly bottom view.
FIG. 4A is a partial side view of an example of use of an embodiment of the present invention.
(B) A partially enlarged side view.
FIG. 5 is an enlarged partial side view of the same before tightening.
FIG. 6A is a side view of another embodiment of the present invention.
(B) The same top view.
(C) Similarly bottom view.
FIG. 7 is a block diagram of an embodiment of the present invention.
FIG. 8 is a plan view for similarly explaining material removal.
FIG. 9 is a perspective view of a similarly punched disc.
FIG. 10 is an exploded perspective view for explaining the contact fixing between the seat plate and the rubber plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,17 Rubber washer 2 Seat plate 3 Rubber plate 4, 5, 6, 18, 19, 20, 21 Stopper 7 Annular groove 8 Bolt hole 9 Rubber plate latching part 22 Metal plate 23, 24, 25, 26 Disc 23a, 23b, 23c Stopper forming part

Claims (2)

The lower part of the seat plate comprising a circular plate provided with bolt holes in the center, a rubber plate for bolt relaxation preventing having a center bolt hole in the abutment fixed with rubber washer, around the seat plate, said rubber Provide a stopper at the time of fastening bent on the plate contact side ,
A rubber plate hooking portion is provided at the peripheral edge of the bolt hole of the seat plate on the rubber plate side, and the rubber plate hooking portion is fitted into a hooking groove formed at the peripheral edge of the bolt hole of the rubber plate, A rubber washer, wherein the washer and the rubber plate are fixed in contact with each other. 2. The rubber washer according to claim 1, wherein the bolt loosening prevention rubber plate is provided with an annular groove on the outer peripheral wall.

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