JP5014279B2 - Fixture and fixing structure - Google Patents

Description

  The present invention relates to a fixture that is fixed to a mounting hole provided on the surface of various objects such as a glass plate, and a fixing structure that uses the fixture.

  Various structures for fixing members such as handles, support members, stud bolts, etc. to a glass plate have been conventionally employed. The one using an adhesive is the simplest, but there are problems of insufficient strength and aging deterioration. Therefore, various mechanical fixing structures that do not use an adhesive or are used in combination with an adhesive have been proposed.

  For example, Patent Document 1 describes a structure in which a nut is tightened through a bolt in a through hole formed in a glass plate. This is because the back side is a countersink, and a bolt having a head shaped to fit the countersink is passed through the through hole from the back side of the glass plate to the front side, and a nut is tightened from the front side. A cushioning material is interposed between the hole and the head, and between the glass plate surface and the nut. In this structure, the bolt head does not protrude from the rear surface of the glass plate by making the end surface of the bolt head flush with the rear surface of the glass plate. However, the bolt head appears to be exposed from the back surface, and the smoothness and decorativeness of the glass plate are impaired.

On the other hand, Patent Document 2 describes a structure in which a hole having a shape extending inward from the surface of a glass plate is formed, a cup-shaped insert is inserted into the hole, and a connecting member is coupled to the recess of the insert. ing. The insert has an outer diameter larger than the opening diameter of the hole, but a plurality of slots are formed in the radial direction to allow insertion into the hole. Moreover, the internal thread is formed in the recessed part of an insert, and the external thread is formed in the front-end | tip part of a connection member, respectively. Therefore, the insert is reduced in the radial direction, inserted into the hole, and the tip of the connecting member is screwed into the recess of the insert, whereby the insert is held in the hole in a state of expanding to the original diameter. Thereby, a connection member is fixed in the state protruded from the surface of the glass plate. In this structure, the hole formed in the glass plate does not need to penetrate from the front surface to the back surface, thereby maintaining the smoothness and decorativeness of the back surface of the glass plate.
JP-A-9-13561 JP-T-2006-507453

  However, in the structure described in Patent Document 2, the insert that is inserted into the hole of the glass plate by reducing the diameter using a plurality of slots comes into contact with the inner surface of the hole by expanding the diameter again. Therefore, in order for the insert to be fixed in the hole, the outer shape of the insert must exactly match the inner surface of the hole. Therefore, high accuracy is required for the outer shape of the insert and the inner surface of the hole, and the processing cost for that is high.

  Further, in order to process the insert with high accuracy, it is advantageous to use a metal, but in this case, once the diameter is increased by inserting it into the hole, it is difficult to reduce the diameter of the insert again in the hole. Therefore, it is difficult to remove the insert from the hole without destroying it, and it is difficult to remove or replace it.

  On the other hand, Patent Document 2 describes that the insert may be an elastically deformable member. In that case, it is easy to take out from the hole, but in the female screw part formed on the elastically deformable member, the holding force of the male screw part of the connecting member cannot be obtained sufficiently, and the fixing of the connecting member becomes unstable. turn into.

  The present invention solves these problems of the prior art, and can be fixed to a hole formed on the surface of an object, and can be stably fixed with low manufacturing effort and cost. An object is to provide a fixture and a fixing structure using the fixture.

In order to achieve the above-mentioned object, the present invention is a fixture that is fixed to a mounting hole whose diameter is expanded by an inclined surface directed inward from the surface of an object, from a distal end portion having a maximum diameter to a proximal end portion side. An anchor member having a tapered surface that is reduced in diameter, and a mounting member that is coupled to the proximal end side of the anchor portion and has a male screw portion that is positioned on the same axis as the anchor portion, and a maximum diameter of the anchor portion. A flexible ring having a large outer diameter and a smaller inner diameter that can pass through the male screw part; a fastening member that can be screwed into the male screw part and has a fastening surface on the side facing the anchor part in the screwed state; A fixing tool, wherein an outer diameter of the fastening surface is made larger than an inner diameter of the flexible ring, and the flexible ring is made of elastically deformable rubber or resin , Is to provide.

  In order to achieve the above object, the present invention is also a fixing structure using the above-mentioned fixing tool, wherein the mounting hole is expanded in diameter by an inclined surface directed inward from the surface of the object. A fixing structure for fixing the fixing tool, wherein the diameter of the opening of the mounting hole is larger than the maximum diameter of the anchor portion and smaller than the outer diameter of the flexible ring and the outer diameter of the fastening surface. The anchor portion is inserted into the mounting hole, the flexible ring is sandwiched between the tapered surface of the anchor portion and the inclined surface of the mounting hole, and the fastening member is screwed into the male screw portion. The present invention provides a fixing structure characterized in that the fastening portion is tightly fastened so as to draw the anchor portion with elastic deformation of the flexible ring in a state where the fastening surface is in contact with the surface.

  In the fixing device according to the present invention, the flexible ring has a larger outer diameter and a smaller inner diameter with respect to the maximum diameter of the anchor portion, and can pass through the male screw portion. Further, the outer diameter of the fastening surface of the fastening member is made larger than the inner diameter of the flexible ring. Therefore, the diameter of the mounting hole formed on the surface of the object is larger than the maximum diameter of the anchor portion and smaller than the outer diameter of the flexible ring and the outer diameter of the fastening surface. The tool can be fixed to the object.

  In other words, when the anchor part is inserted into the mounting hole, and the flexible ring passed through the male thread part is bent and pushed into the mounting hole, the outer diameter and the inner diameter may be larger than the maximum diameter of the anchor part. The flexible ring is located between the tapered surface of the anchor portion and the inclined surface of the mounting hole. In this state, if the fastening member is screwed into the male screw portion and screwed into contact with the surface of the object, the fastening surface contacts the surface of the object outside the edge of the opening having a small diameter. If the fastening member is fastened in this state, the anchor portion is drawn with the elastic deformation of the flexible ring. And a fixing tool is fixed with respect to a target object by fastening a fastening member tightly. Therefore, the fixture can be fixed to the hole formed on the surface of the object. Further, since the fixture has a simple structure including an attachment member having an anchor portion and a male screw portion, a flexible ring, and a fastening member, the manufacturing cost can be reduced. Furthermore, the fastening member is fastened tightly by pulling the anchor portion and elastically deforming the flexible ring, so that the fixing of the fixture is stable.

  The fixing structure according to the present invention uses the above-mentioned fixture to the mounting hole having the diameter of the opening described above, inserts the anchor portion and the flexible ring into the mounting hole, and screws the fastening member into the male screw portion. As a result, the anchor portion is pulled and fixed firmly. Therefore, as described above, the fixture can be fixed to the hole formed on the surface of the object, and the manufacturing cost can be kept low by the fixture having a simple structure. Fixing becomes stable.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same or similar parts in the drawings may be denoted by the same reference numerals and description thereof may be omitted. FIG. 1 is a longitudinal sectional view showing a fixing structure in which a fixture according to an embodiment of the present invention is attached to a glass plate, and FIG. 2 is an exploded sectional view showing the fixture and the glass plate.

  The fixture 1 includes a bolt-shaped attachment member 10, a flexible ring 50, and a fastening member 60. In the mounting member 10, an anchor part 30 is coupled to one end of the male screw part 20, and the anchor part 30 is provided on the same axis with respect to the male screw part 20. The anchor portion 30 includes a tapered surface 32 that decreases in diameter from the distal end portion 31 having the maximum diameter toward the proximal end portion, and is formed in a trapezoidal shape as viewed from the side.

  The flexible ring 50 has a circular member cross section, and the overall shape is an annular shape in plan view. The fastening member 60 is composed of two members, a nut 61 and an intermediate plate 62 in this embodiment. The nut 61 is formed with a female screw portion 611 that can be screwed into the male screw portion 20. The intermediate plate 62 is formed with a through hole 621 having an inner diameter C62 through which the male screw portion 20 passes loosely, and the side facing the anchor portion 30 in a state of being passed through the male screw portion 20 is a fastening surface 622. The outer diameter of the fastening surface 622 is larger than the inner diameter C5 of the flexible ring 50. The intermediate plate 62 is also provided with an annular protrusion 623 protruding from the fastening surface 622. The outer diameter E623 of the annular protrusion 623 is smaller than the outer diameter E5 of the flexible ring and larger than the inner diameter C5.

  A glass plate 80 as an object is formed with a mounting hole 81 whose diameter is increased by an inclined surface 82 directed inward from the surface. The diameter C8 of the opening 83 of the mounting hole 81 is larger than the maximum diameter D3 of the anchor portion 30 and the outer diameter E623 of the annular protrusion 623 of the intermediate plate 62, and is outside the outer diameter E5 of the flexible ring 50 and the fastening surface 622. It is smaller than the diameter E62. In this embodiment, the opening 83 of the attachment hole 81 has a slight height as a vertical wall 84, and the strength of the opening edge is increased.

  Between the back end surface of the mounting hole 81 and the end surface on the maximum diameter side of the anchor portion 30, a buffer plate 90 having a diameter smaller than the inner diameter of the back end surface of the mounting hole and larger than the maximum diameter side end surface of the anchor portion 30 is interposed. ing.

The dimensions of the main parts of the above members are as follows. However, the present invention is not limited to these dimensions.
-Mounting member 10
Maximum diameter D3 of anchor portion 30: 13 mm
External diameter D2 of male screw part 20: 8 mm
Anchor portion 30 height H3: 5 mm
Inclination angle θ3 of the taper surface 32 with respect to the axial direction of the male screw portion: 55 degrees, flexible ring 50
Outer diameter E5: 16mm
Inner diameter C5: 10mm
Diameter of member cross section D5: 3 mm
・ Nut 61
Outer diameter E61: 19mm
Intermediate plate 62
Outer diameter E62: 22mm
Inner diameter C62: 8mm
Outer diameter E623 of the annular protrusion 623: 14.6 mm
The height H623 of the annular protrusion 623: 1.6 mm
・ Glass plate 80 mounting hole 81
Diameter of opening 83 C8: 15 mm
Diameter of bottom 85 E8: 17mm
Depth H8: 6mm
Inclination angle θ8 of inclined surface 82: 80 degrees, buffer plate 90
Outer diameter D90: 16mm
Thickness T90: 1.2mm
The fixture 1 is attached to the glass plate 80 as follows. First, the buffer plate 90 is inserted into the mounting hole 81 formed in the glass plate 80 and laid on the back end surface. Next, the anchor portion 30 of the attachment member 10 is inserted into the attachment hole 81. Since the diameter C8 of the opening 83 of the attachment hole 81 is larger than the maximum diameter D3 of the anchor portion 30, the anchor portion 30 is inserted without resistance and is positioned on the buffer plate 90.

  Next, the flexible ring 50 is passed down from above the male screw portion 20 to the glass plate 80 and pushed into the mounting hole 81 through the gap between the male screw portion 20 and the opening 83. The outer diameter E5 of the flexible ring 50 is larger than the diameter C8 of the opening 83, but can be elastically deformed based on the flexibility and pushed into the mounting hole 81. Further, since the flexible ring 50 has a larger outer diameter E5 and a smaller inner diameter C5 with respect to the maximum diameter D3 of the anchor portion 30, in the mounting hole 81, the tapered surface 32 and the mounting hole of the anchor portion 30 are provided. It is located between 81 inclined surfaces 82.

  Next, the intermediate plate 62 is passed from above the male screw portion 20 and lowered onto the glass plate 80. Since the diameter C8 of the opening 83 of the attachment hole 81 is smaller than the outer diameter E62 of the fastening surface 622, the fastening surface 622 contacts the surface of the glass plate 80. Further, since the diameter C8 of the opening 83 of the mounting hole 81 is larger than the outer diameter E623 of the annular protrusion 623 of the intermediate plate 62, the annular protrusion 623 is brought into contact with the surface of the glass plate. Is inserted into the opening 83. Since the outer diameter of the annular protrusion 623 is smaller than the outer diameter of the flexible ring 50 and larger than the inner diameter, the opening 83 inserted into the opening 83 contacts the flexible ring 50. Will be.

  Next, the nut 61 is screwed onto the male screw portion 20 and is lowered while being rotated to reach the intermediate plate 62. Then, when the nut 61 is tightly fastened to the male screw portion 20, the anchor portion 30 is drawn and the flexible ring 50 is elastically deformed between the inclined surface 82 of the attachment hole 81. Thereby, the fixture 1 is firmly fixed to the glass plate 80.

  The mounting member 10, the intermediate plate 62, and the nut 61 are preferably made of metal from the viewpoint of mechanical strength, and may be made of hard resin.

  The flexible ring 50 can be elastically deformed to pass through the opening 83 of the glass plate 80 smaller than the outer diameter thereof, and the fastening member 60 can be firmly fixed so that the fastening of the mounting member 10 is firm. A small amount of deformation is desirable. As such a material, rubbers such as nitrile rubber, fluorine rubber, silicone rubber, fluorosilicone rubber, ethylene propylene rubber, styrene butadiene rubber, and acrylic rubber, or resins having similar mechanical properties can be used.

  The buffer plate 90 is made of a material such as a flexible synthetic resin or rubber so as to provide a buffering action between the glass plate 80 and the anchor portion 30 in the mounting hole 81. By interposing the buffer plate 90, the glass plate 80 is prevented from being damaged by excessive tightening of the nut 61 or an impact received after assembly. For this purpose, the buffer plate 90, the anchor portion 30 and the flexible ring 50 are placed in the mounting hole 81 so that there is no gap between the deep end surface of the mounting hole 81 and the anchor portion 30 by tightening the nut 61. It is desirable that the thickness be determined so that the buffer plate 90 is elastically compressed in the thickness direction when inserted. The mounting hole 81 of the glass plate 80 can be formed as shown in FIG. 3, for example. First, as shown in FIG. 3A, a pilot hole 81a having a diameter corresponding to the opening 83 is drilled to a required depth by a drill DR1. Next, the drill DR2 with a small diameter is applied to the side surface of the pilot hole 81a and gradually tilted while turning, thereby expanding the lower part of the pilot hole 81a in the radial direction. In this way, the inclined surface 82 is formed, and the mounting hole 81 is completed. In addition, the attachment hole 81 can also be formed by using a drill whose blade portion advances and retreats in the radial direction and causing the blade portion to protrude larger in the radial direction as drilling proceeds. Alternatively, if the object is a material that can be molded, the opening 83 can be molded when the object is molded.

  Next, a fixing structure using a fixing tool according to another embodiment of the present invention will be described. FIG. 4 is a longitudinal sectional view of the fixing structure. The fixture 1 has the same basic form as the previous embodiment, but the form of the attachment member 10 and the intermediate plate 62 is different in the following points.

  The anchor portion 30 of the attachment member 10 includes an intermediate portion 35 between the tapered surface 32 and the male screw portion 20. The intermediate portion 35 is shortly extended in a cylindrical shape with the same diameter from the minimum diameter portion at the upper end of the tapered surface 32. As a result, the inclination angle θ3 of the tapered surface 32 is larger than that of the previous embodiment. Accordingly, the pressing force acting on the flexible ring 50 becomes stronger when the fastening member 60 is fastened.

  The intermediate plate 62 of the fastening member 60 has a flat disk shape, and the annular protrusion 623 existing in the previous embodiment is omitted. Also in this case, the flexible ring 50 contacts or contacts the lower surface of the intermediate plate 62 by changing the thickness of the flexible ring 50 or the size of the gap between the anchor portion 30 and the mounting hole 81. Even if not, an appropriate fixing force can be obtained by holding the position of the flexible ring 50 by fastening.

  Next, a test example using the fixture shown in FIG. 1 will be described.

(Tensile strength test)
A fixing tool was attached to the glass plate in which the attachment hole was formed, and the nut was fastened to obtain the state shown in FIG. 1, and this was fixed to the tensile test jig shown in FIG. FIG. 5A is a front view of the attached state, FIG. 5B is a side view thereof, and FIG. 5C is an exploded perspective view of the glass with fixture and the jig.

  The jig comprises a support A having a projecting piece A2 at the bottom of a rectangular box A1, a through hole A3 at the top, and an opening A4 on the opposite side, and a metal bar B having a female threaded hole. It has become. A glass plate with a fixture is inserted into the box A1 from the opening A4, the male screw portion 20 is protruded upward from the through hole A3, and is screwed into the female screw of the metal bar B. Then, the metal rod B and the projecting piece A2 are respectively grasped by the upper and lower grip portions of the Instron universal testing machine 5528 type. In this state, a tensile load was applied between the upper and lower gripping portions to obtain a load-displacement curve and a maximum load. The test speed was 2 mm / min and the test temperature was 23 ° C.

  The load-displacement curve is shown in FIG. As is apparent from the graph of FIG. 7, the fixture was stably fixed to the glass plate until a maximum load of 1.48 kN was reached.

(Shear strength test)
A fixing tool was attached to the glass plate in which the attachment hole was formed, and the nut was fastened to obtain the state shown in FIG. 1, and this was fixed to the shear test jig A shown in FIG. 6A is a front view of the mounted state, FIG. 6B is a side view thereof, and FIG. 6C is an exploded perspective view of the glass with fixture and the jig.

  The jig C is formed integrally with a vertical wall C2 standing on a horizontal base C1 and a reinforcing portion C3. The vertical wall C2 has an opening C5 at the center, and inward vertical grooves C6 are formed at the standing portions C4 on both sides thereof. A pair of reinforcing portions C3 are provided, and are respectively coupled to the standing portion C4 and the horizontal base C1. The glass plate with a fixture is passed through the longitudinal groove C6, and the attachment member 10 is positioned in the opening C5. Then, the male screw portion 20 of the mounting member 10 was pushed down from above with an Instron universal testing machine 5528 type load fitting, and a load-displacement curve and a maximum load were obtained. The test speed was 2 mm / min and the test temperature was 23 ° C.

  The load-displacement curve is shown in FIG. As is apparent from the graph of FIG. 8, the fixture was stably fixed to the glass plate until a maximum load of 3.24 KkN was reached. In addition, the peak load of 0.67 kN was shown on the way because the tip of the load fitting of the testing machine that was in contact with the thread portion of the male screw portion 20 of the mounting member 10 By moving to the valley.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, the fastening member 60 can integrally form a nut 61 provided with a female screw and an intermediate plate 62 provided with a through hole through which the male screw part 20 passes loosely. Further, the intermediate plate 62 may be omitted. In this case, the lower end of the nut 61 may be a flat surface, or a protrusion corresponding to the annular protrusion 623 may be formed.

  The attachment member forming a part of the fixture includes at least an anchor portion and a male screw portion, and various structures can be coupled thereto. FIG. 9 shows an example in which the angle fitting 101 is welded to the tip of the male screw portion 20 of the fixture 1A located on the right side of the drawing by the welding portion 102. The fixing tool 1A is fixed to the mounting hole 81A of the glass plate 80A. The fixture 1B located on the left side of the figure is fixed to the mounting hole 81B of the glass plate 80B, the male screw portion 20 is passed through the through hole 103 of the angle fitting 101, and is fixed to the angle fitting 101 by the washer 104 and the nut 105. Yes. The glass plates 80A and 80B extend long in the direction perpendicular to the paper surface of the figure, and a plurality of angle fittings 101 are arranged in the same direction, whereby the glass plate 80A and the glass plate 80B are fixed.

  The fixture according to the present invention can be attached to plate materials other than glass plates and other various objects. FIG. 10 shows a state in which the fixture 1 is attached to the block-shaped object 107. As illustrated, the mounting surface may be a curved surface. In this case, it is desirable to match the shape of the contact surface of the intermediate plate 62 with the mounting surface.

It is a longitudinal cross-sectional view which shows the fixing structure which attached the fixing tool which concerns on one Embodiment of this invention to the glass plate. It is sectional drawing which decomposes | disassembles and shows the fixing tool and glass plate which were shown in FIG. It is sectional drawing which shows the formation process of the attachment hole for the fixing structure shown in FIG. It is a longitudinal cross-sectional view which shows the fixing structure which attached the fixing tool which concerns on other embodiment of this invention to the glass plate. It is explanatory drawing of the jig | tool used for the tensile strength test of the fixed structure of FIG. It is explanatory drawing of the jig | tool used for the shear strength test of the fixed structure of FIG. It is a graph which shows the result of the tensile strength test by the jig | tool shown in FIG. It is a graph which shows the result of the shear strength test by the jig | tool shown in FIG. It is sectional drawing of the other example of the fixing structure using the fixing tool which concerns on this invention. It is sectional drawing of the further another example of the fixing structure using the fixing tool which concerns on this invention.

Explanation of symbols

1, 1A, 1B Fixing tool 10 Mounting member 20 Male thread portion 30 Anchor portion 31 Maximum diameter tip portion 32 Tapered surface 50 Flexible ring 60 Fastening member 61 Nut 62 Intermediate plate 80, 80A, 80B Glass plate 81 Mounting hole 82 Inclined Surface 83 Opening portion 62 Intermediate plate 107 Object 622 Fastening surface 623 Annular protrusion

Claims (4)

A fixture that is fixed to a mounting hole whose diameter is increased by an inclined surface directed inward from the surface of the object,
Mounting with an anchor portion having a tapered surface that is reduced in diameter from the distal end portion having the maximum diameter toward the proximal end portion, and a male screw portion that is coupled to the proximal end side of the anchor portion and is positioned on the same axis as the anchor portion Members,
A flexible ring having a larger outer diameter and a smaller inner diameter with respect to the maximum diameter of the anchor portion and capable of passing the male screw portion;
A fastening member capable of being screwed to the male screw part and having a fastening surface on the side facing the anchor part in the screwed state;
The outer diameter of the fastening surface is larger than the inner diameter of the flexible ring;
The flexible ring is made of elastically deformable rubber or resin . The fastening member includes an annular protrusion that protrudes from the fastening surface and can contact the flexible ring on the tapered surface in a screwed state with the male screw portion. The fixing tool according to claim 1, wherein the fixing tool is smaller than an outer diameter of the sex ring and larger than an inner diameter thereof. The fixture according to claim 1 or 2, wherein a buffer plate is interposed between a back end face of the mounting hole and an end face on the maximum diameter side of the anchor portion. A fixing structure using the fixture according to any one of claims 1 to 3,
A fixing structure in which the fixture according to claim 1 or 2 is fixed to a mounting hole whose diameter is increased by an inclined surface directed inward from the surface of the object,
The diameter of the opening of the mounting hole is larger than the maximum diameter of the anchor part, and smaller than the outer diameter of the flexible ring and the outer diameter of the fastening surface,
The anchor portion is inserted into the mounting hole, the flexible ring is sandwiched between a tapered surface of the anchor portion and an inclined surface of the mounting hole, and the fastening member is screwed into the male screw portion and fastened. A fixing structure characterized in that the anchor portion is tightly fastened so as to pull the anchor portion with elastic deformation of the flexible ring in a state where a surface is in contact with the surface.

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