JP2013257009A - Insert collar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insert collar improved also in spin-around and slip-off prevention functions.SOLUTION: A metal insert collar inserted into a resin member or a metal member includes a collar body 2 formed cylindrically by bending a sheet metal. Truncated pyramid-shaped recesses 3 having an opening shape larger than a bottom surface shape are disposed regularly in the outer peripheral surface of the collar body 2 in the height direction and the circumferential direction of the collar body 2.

Description

  The present invention relates to an insert collar embedded in a resin member or a metal member.

  Insert collars molded from metal are known. The insert collar is embedded in, for example, a bolt insertion hole of a resin member by insert molding, and prevents the resin around the insertion hole from being damaged by the tightening torque of the bolt. The bolt inserted through the insert collar is fastened to a metal member, for example, thereby fixing the resin member to the metal member.

  In such an insert collar, in order to reinforce the bonding force between the outer peripheral surface of the insert collar and the resin member, irregularities are formed on the outer peripheral surface, and the reverse of the external thread portion of the bolt (screw member). What formed the protrusion or groove | channel inclined in the screw direction is known (for example, refer patent document 1). By forming such irregularities, ridges, or grooves, this insert collar rotates in the circumferential direction or in the assembly direction with respect to the resin member in which the insert collar is embedded by the tightening torque of the bolt. Occurrence of omission is prevented.

Registered Utility Model No. 3103899

However, in recent years, there has been a demand for further improvements in functions for preventing such idling and prevention.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an insert collar with improved functions for preventing idling and slipping.

The insert collar of the present invention is a metal insert collar embedded in a resin member or a metal member.
A metal plate has a collar body formed by bending into a cylindrical shape,
On the outer peripheral surface of the color main body, there is a truncated pyramid-shaped concave portion whose opening shape is larger than the bottom shape, or a truncated pyramid-shaped convex portion whose upper end surface shape is smaller than the bottom shape. And regularly arranged along the circumferential direction.

  According to this insert collar, since the pyramid-shaped concave or convex portions are regularly arranged along the height direction and the circumferential direction of the collar body on the outer peripheral surface of the collar body, they are embedded. With respect to the resin member and the metal member, the idle rotation in the circumferential direction and the disconnection in the assembling direction are more reliably prevented.

In the insert collar, it is preferable that the concave portion or the convex portion has a quadrangular pyramid shape.
In that case, the concave portion has each side of the opening shape of 1 mm or more and 2 mm or less, a depth of 0.15 mm or more and 0.8 mm or less, and an inclination angle with respect to the bottom surface of each inner surface is 30 ° or more and 90 °. Or each side of the bottom shape is 1 mm or more and 2 mm or less, the height is 0.15 mm or more and 0.8 mm or less, and the inclination angle of the outer surface with respect to the outer peripheral surface of the color main body is less than It is preferably 30 ° or more and less than 90 °.
In this way, as can be seen from the experimental results to be described later, it is possible to more reliably prevent the resin member or metal member in which the resin member or metal member is embedded from being idle in the circumferential direction or coming out in the assembling direction.

  In the insert collar according to the present invention, the functions for preventing idling and preventing slipping are improved. For example, by embedding the insert collar in a resin member, the members can be more firmly fastened. Moreover, even if it embeds with respect to a metal member, the same effect can be acquired.

It is a figure which shows schematic structure of one Embodiment of the insert collar which concerns on this invention, (a) is the perspective view which notched a part, (b) is an expanded view which shows the outer peripheral surface side. (A) is a principal part side sectional view of a color main part for explaining the shape of a crevice, and (b) is a principal part side sectional view of a color main part for explaining the shape of a convex part. It is a sectional side view for demonstrating the usage form of insert collar. It is a sectional side view for demonstrating the measuring method of drawing strength. (A)-(c) is an expanded view which shows the form of the outer peripheral surface side of the comparative example of an insert collar.

Hereinafter, the insert collar of the present invention will be described in more detail with reference to the drawings.
1A and 1B are diagrams showing a schematic configuration of an embodiment of an insert collar according to the present invention, in which FIG. 1A is a perspective view with a part cut away, and FIG. FIG. In these drawings, reference numeral 1 denotes an insert collar, and the insert collar 1 is made of a metal embedded in a resin member or a metal member.

The insert collar 1 includes a cylindrical collar body 2 and a plurality of recesses 3 formed on the outer peripheral surface of the collar body 2 as shown in FIG.
The color main body 2 is formed by bending a metal plate 2a shown in FIG. 1 (b) into a cylindrical shape.

  The metal plate 2a is formed, for example, by stamping or cutting out a metal flat plate obtained by performing nickel plating on a cold-rolled steel plate into a strip shape (long and thin rectangular shape) having a predetermined dimension. As shown in FIG. 1B, the metal plate 2a has a plurality of recesses 3 formed on one surface thereof, that is, the surface that is the outer peripheral surface.

  The plurality of recesses 3 shown in FIG. 1 (b) are formed by crushing (press molding) the metal plate 2a, and are regular along the short side direction and the long side direction of the metal plate 2a. Are arranged. With such a configuration, the concave portion 3 is regularly arranged along the height direction and the circumferential direction of the collar body 2 when the metal plate 2a is bent along the long side direction and the respective short sides are abutted. It will be established.

  The recess 3 has a truncated pyramid shape in which the shape of the opening 3a (opening shape) is larger than the shape of the bottom surface (bottom shape), and is formed in a quadrangular pyramid shape in this embodiment. Specifically, as shown in FIG. 2A, which is a cross-sectional side view of the main part of the collar body 2, the length L of each side of the shape of the opening 3a is 1 mm or more and 2 mm or less, and the depth d is It is preferable that the inclination angle θ of each inner side surface 3b with respect to the bottom surface 3c is 30 ° or more and less than 90 °. However, in this specification, as shown in FIG. 2A, the inclination angle of each inner side surface 3b with respect to the extended surface of the bottom surface 3c is defined as the inclination angle θ.

  The shape of the opening 3a and the shape of the bottom surface 3c may be rectangular or square as long as it is a rectangle (rectangle), and may be a rhombus or a parallelogram. In the case of a rectangle or a parallelogram, the lengths of both the long side and the short side are preferably 1 mm or more and 2 mm or less. In this embodiment, the shape of the opening 3a and the shape of the bottom surface 3c are square.

The thickness of the collar body 2, that is, the thickness of the metal plate 2 a (thickness at a portion other than the portion where the recess 3 is formed) is the size (screw) of the bolt (male screw) inserted through the insert collar 1. It is set appropriately according to the size). The depth d of the recess 3 is appropriately set according to the thickness of the collar body 2, that is, the thickness of the metal plate 2a (the thickness at a portion other than the portion where the recess 3 is formed). For example, the relationship between the screw size, the thickness of the insert collar 1 (thickness of the metal plate 2a), and the depth d of the recess 3 is as follows.
Screw size Metal plate 2a thickness Recess 3 depth d
・ M2.6 0.5-1.3mm 0.15-0.30mm
・ M3 0.5-1.3mm 0.15-0.30mm
・ M4 0.7-1.5mm 0.20-0.30mm
・ M5 1.0-2.0mm 0.20-0.40mm
・ M6 1.0-2.0mm 0.20-0.50mm
・ M8 1.5 ~ 2.8mm 0.20 ~ 0.80mm

  Further, the inclination angle θ is set to 30 ° or more and less than 90 ° further corresponding to the depth d of the recess 3 thus set. If the angle is less than 30 °, the pullout strength and rotational torque for the member in which the insert collar 1 is embedded is reduced, and there is a possibility that functions for preventing slipping and preventing idling cannot be obtained sufficiently. On the other hand, when the angle is 90 ° or more, it becomes impossible to perform die cutting after forming the concave portion 3 by crushing, and processing becomes difficult.

  Further, the length L of each side of the opening 3a is appropriately set within a range of 1 mm or more and 2 mm or less so as to satisfy the depth d and the inclination angle θ. In this way, by setting the length L of each side of the opening 3a, the depth d of the recess 3 and the inclination angle θ within the above ranges, the recess 3 is made of a resin member or metal in which the insert collar 1 is embedded. It is coupled (locked) to the member with sufficient strength to prevent idle rotation in the circumferential direction and disconnection in the assembly direction.

  As shown in the developed view of FIG. 1B, the recesses 3 having such shapes and dimensions are, for example, three rows at equal intervals along the short side direction (the height direction of the collar body 2) of the metal plate 2a. Nine rows are formed and arranged at equal intervals along the long side direction of the metal plate 2a (the circumferential direction of the color main body 2). That is, the recesses 3 are regularly arranged in the vertical and horizontal directions on the outer peripheral surface of the collar body 2. By arranging the recesses 3 in this manner in a regular manner, the recesses 3 can more reliably prevent the resin member or the metal member in which the insert collar 1 is embedded from spinning around in the circumferential direction or coming off in the assembly direction. To prevent. The arrangement of the recesses 3 is appropriately set according to the size of the collar body 2, that is, the size of the metal plate 2a, the thickness thereof, and the like.

  In order to form the insert collar 1 having such a configuration, a strip-shaped metal plate having a predetermined size is first formed from a metal flat plate by punching as described above. Next, as shown in FIG.1 (b), several recessed part 3 is formed in one surface of this metal plate by a crushing process (press molding), and is arrange | positioned regularly. Thereby, the metal plate 2a is obtained. Alternatively, the metal plate may be crushed (press-molded) in advance to form the recess 3, and then a strip-shaped metal plate 2a having a predetermined size may be formed by punching.

  Next, the insert plate 1 is obtained by bending the metal plate 2a in the long side direction by bending and forming the cylindrical side by butting each short side. By forming in a cylindrical shape by bending as described above, the concave portions 3 are regularly arranged along the height direction and the circumferential direction of the collar body 2, that is, vertically and horizontally.

  For example, as shown in FIG. 3, the insert collar 1 having such a configuration is embedded by insert molding around a bolt insertion hole 5 of a resin member 4 used as an exterior cover or the like. Insert molding is a method in which a resin is poured and molded in a state where the insert collar 1 is placed in a mold such as an injection mold.

  The height of the insert collar 1 is set, for example, to be equal to the thickness of the resin member 4 in which the insert collar 1 is embedded. Therefore, the openings on both sides thereof are flush with the front surface and the back surface of the resin member 4, respectively. Are arranged as follows. By embedding the insert collar 1 in the resin member 4 in this way, it becomes possible to fix the resin member 4 to the metal member 7 with a bolt (male screw) 6 with high strength.

  That is, the bolt 6 is inserted into the inner hole (bolt insertion hole) 1 a of the insert collar 1, and the bolt 6 is screwed into a female screw 8 formed on the metal member 7. Thereby, the resin member 4 can be fixed to the metal member 7 by the bolt 6.

  In the insert collar 1 of the present embodiment, since the quadrangular pyramid-shaped concave portions 3 are regularly arranged on the outer peripheral surface thereof, the outer peripheral surface of the insert collar 1 (color body 2) and the resin member 4 are arranged. As a result, the coupling force increases with respect to the resin member 4 in which the insert collar 1 is embedded, so that the idle rotation in the circumferential direction and the slipping in the assembling direction are more reliably prevented. It will be a thing.

  In addition, since the insert collar 1 is formed by forming the metal plate 2a into a cylindrical shape, the use efficiency of the material is remarkably improved as compared with, for example, forming a hole from a round bar-like material and forming it into a cylindrical shape. In addition, the time required for processing can be shortened. Therefore, cost can be reduced.

"Experimental example"
As the insert collar 1 of the present invention, a concave portion 3 formed in 3 rows by 9 rows as shown in FIG. 1B was prepared. The recess 3 has a regular quadrangular pyramid shape, and the length L of each side of the opening 3a shown in FIG. 2A is 1.6 mm, the depth d is 0.36 mm, and the inclination angle θ is 74.5 °. . The insert collar 1 had an outer diameter of 8.5 mm and a height of 10 mm.
This insert collar 1 was embedded in a regular quadrangular columnar resin member 4 made of PPS [Fortron] and having a height of 10 mm and a side length of 25 mm by insert molding, and integrated into Sample A.

As shown in FIG. 4, this sample A was placed on a table 10 having a hole 9, and the insert collar 1 was placed on the hole 9. Thereafter, the round pin 11 is brought into contact with the insert collar 1, the force F is applied to the round pin 11, and the strength thereof is gradually increased. The strength when the insert collar 1 is pulled out of the resin member 4 (pulling out) Strength) was measured.
Similarly, a sample B was prepared by slitting the insert collar 1 of the sample A prepared in the same manner. And the measuring piece of the torque meter was inserted in the slit of this sample B, rotational torque was added to this measuring piece, and the rotational torque which the insert collar 1 begins to rotate was measured.

For comparison, samples A1 to A3 and samples B1 to B3 were prepared in the same manner as in the case of the insert collar 1 with respect to the insert collar having the recesses shown in the development views of FIGS. The pullout strength and rotational torque were measured.
The recess 41 shown in FIG. 5A has a regular quadrangular pyramid shape with the opening being a regular square, and the length L of each side of the opening is 1.76 mm and the depth d is 0.36 mm. The insert collar formed with such a recess 41 was insert-molded in the same manner as in the preparation of Sample A and Sample B, and the obtained resin members were designated as Sample A1 and Sample B1. The outer diameter of the insert collar of this example is the same as that of the insert collar 1.

  The recess 42 shown in FIG. 5 (b) has a regular quadrangular pyramid shape with the opening being a regular square, the length L of each side of the opening is 1.76 mm, the depth d is 0.36 mm, and the inclination angle. θ is 26.3 °. The insert collar formed with such a recess 42 was insert-molded in the same manner as in the preparation of Sample A and Sample B, and the obtained resin members were designated as Sample A2 and Sample B2. The outer diameter of the insert collar of this example is the same as that of the insert collar 1.

  The recess 43 shown in FIG. 5C has the same shape as the recess 3 of the insert collar 1 in this experimental example. However, in the insert collar shown in FIG. 5 (c), apart from the recess 3, the slant groove that extends obliquely with respect to the long side direction of the metal plate and thus spirals when formed into a cylindrical shape. 12 was formed. The oblique groove 12 is formed so as to be inclined in the reverse screw direction with respect to the male screw (bolt) inserted through the insert collar. Therefore, when the insert collar starts to rotate with the rotation of the male screw, It is formed to resist this. The insert collar formed with such recesses and oblique grooves 12 was insert-molded in the same manner as in the preparation of Sample A and Sample B, and the obtained resin members were designated as Sample A3 and Sample B3. The outer diameter of the insert collar of this example is the same as that of the insert collar 1.

As described above, for each of the samples A, A1 to A3, and the samples B and B1 to B3, the pullout strength and the rotational torque were measured, respectively. The obtained results are shown below.
Pull-out strength Rotational torque ・ Sample A / Sample B 523.9 Kg 19.92 N · m
Sample A1 / Sample B1 283.2Kg 10.63N · m
Sample A2 / Sample B2 346.0 Kg 13.62 N · m
Sample A3 / Sample B3 446.0 Kg 12.94 N · m

  From the above results, the insert collar 1 (sample A, sample B) of the present invention has a higher pulling strength from the resin member and a rotational torque at which rotation starts than the comparative examples (samples A1 to A3, samples B1 to B3). I understood that. Therefore, according to the insert collar 1 of the present invention, it was confirmed that idling in the circumferential direction and disconnection in the assembling direction are more reliably prevented.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, in the embodiment, the quadrangular pyramid-shaped concave portion 3 is provided on the outer peripheral surface of the color main body 2. Instead of this, the pyramid-shaped convex portion whose upper end surface shape is smaller than the bottom shape is used. You may arrange | position regularly along 2 height directions and circumferential directions. The regular arrangement is the same as in the case of the recess 3.

Further, the specific shape of the convex portion is preferably a quadrangular pyramid shape. In that case, for example, as shown in FIG. 2B, the length L of each side of the bottom shape is 1 mm or more and 2 mm or less, the height h is 0.15 mm or more and 0.8 mm or less, The inclination angle θ with respect to the outer peripheral surface of the color main body is preferably 30 ° or more and less than 90 °. However, in this specification, as shown in FIG. 2B, the inclination angle of each outer surface 13a with respect to the extended surface of the outer surface of the collar body 2 toward the bottom side of the convex portion 13 is defined as the inclination angle θ. ing.
The shape and bottom shape of the upper end surface 13b may be rectangular or square as long as it is a rectangle (rectangle), and may be a rhombus or a parallelogram. In the case of a rectangle or a parallelogram, the lengths of both the long side and the short side are preferably 1 mm or more and 2 mm or less.

  In the above-described embodiment, the form in which the insert collar of the present invention is mainly embedded in a resin member has been described. However, the present invention is not limited to this and is used by being embedded in a metal member. May be. Even in that case, there is an excellent effect that it is possible to more reliably prevent idling in the circumferential direction and disconnection in the assembling direction.

DESCRIPTION OF SYMBOLS 1 ... Insert collar, 2 ... Color main body, 2a ... Metal plate, 3 ... Concave part, 3a ... Opening part, 3b ... Inner side surface, 3c ... Bottom surface, 4 ... Resin member, 13 ... Convex part, 13a ... Outer side surface, 13b ... Upper end surface, L ... length, d ... depth, h ... height, θ ... tilt angle

Claims (3)

In the metal insert collar embedded in the resin member or metal member,
A metal plate has a collar body formed by bending into a cylindrical shape,
On the outer peripheral surface of the color main body, there is a truncated pyramid-shaped concave portion whose opening shape is larger than the bottom shape, or a truncated pyramid-shaped convex portion whose upper end surface shape is smaller than the bottom shape. And an insert collar arranged regularly along the circumferential direction.   The insert collar according to claim 1, wherein the concave portion or the convex portion has a quadrangular frustum shape. The recess has each side of the opening shape of 1 mm or more and 2 mm or less, a depth of 0.15 mm or more and 0.8 mm or less, and an inclination angle with respect to the bottom surface of each inner surface is 30 ° or more and less than 90 °. Alternatively, the convex portion has each side of the bottom shape of 1 mm or more and 2 mm or less, a height of 0.15 mm or more and 0.8 mm or less, and an inclination angle of the outer surface with respect to the outer peripheral surface of the color body is 30 ° or more and 90 °. The insert collar according to claim 2, wherein the insert collar is less than °.

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