KR101256715B1 - Insert bolt and nut for improved combination - Google Patents

Abstract

The present invention is an insert bolt consisting of a threaded portion provided with a screw thread on the outer circumference of the body and a head portion formed on an upper surface of the threaded portion, and includes a plurality of protrusions protruding from the side surface of the head. Provide insert bolts.
In addition, the present invention is an insert nut consisting of a nut portion provided with a screw thread on the inside and the head portion extending on the upper surface of the nut portion to enable the screw portion, characterized in that it comprises a plurality of protrusions protruding to the side of the head portion. It provides an insert nut with improved coupling force.

Description

INSERT BOLT AND NUT FOR IMPROVED STRENGTH {INSERT BOLT AND NUT FOR IMPROVED COMBINATION}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to insert bolts and nuts with improved binding forces, and more particularly to insert bolts and nuts with improved binding forces for securing insert bolts and nuts embedded in an injection or press mold.

In general, in order to fix various structures to an object to be injected or press-formed, a method of forming a through hole and installing a bolt in the through hole, and integrally buying a bracket for supporting the bolt and nut when injection molding the resin mold The method is applied.

The bolts and nuts embedded in the injection or press mold are called insert bolts and insert nuts. The insert bolts and nuts are supported by plate-shaped brackets bent at both ends.

That is, a predetermined hole is inserted into the bracket bent at a predetermined height, and a predetermined insert bolt comprising a head and a screw portion is inserted into the through hole, or a predetermined insert nut comprising a head and a nut portion is inserted. After that, it is fixed integrally during the injection molding of the synthetic resin mold.

However, due to the rotational force applied in the bolt and nut fastening process, there is a problem that the insert bolt and the insert nut is rotated to be separated or separated from the plastic mold.

In addition, this separation phenomenon is caused because the contact surface constrained in the torque rotation direction is small.

Therefore, conventionally, in order to prevent this, the bracket was welded and fixed to the head of the insert bolt or the insert nut in advance.

However, in this case, there is a problem that the working time is delayed for a long time due to welding the insert bolt or nut one by one.

SUMMARY OF THE INVENTION An object of the present invention is to provide an insert bolt and nut having an improved binding force in order to improve torque by adding a protrusion to the head of a bolt and nut inserted into a plastic injection and press product to increase the contact load with the plastic. .

Another object of the present invention is to provide an insert bolt and nut which improves the bonding force to increase the contact surface is constrained in the direction of torque rotation due to the addition of the protrusion to separate from the plastic mold, or to prevent the problem of being spaced apart.

According to the idea of the present invention, in the insert bolt consisting of a screw portion provided with a screw thread on the outer circumference of the body and a head extending on the upper surface of the screw portion, characterized in that it comprises a plurality of protrusions protruding to the side of the head portion; It provides an insert bolt with improved coupling force.

It is preferable that the protrusion part protrudes perpendicularly to the side surface of the head part.

In addition, the protrusion is preferably in frictional contact in the torque rotation direction.

The width of the protrusion is preferably formed to be narrower than the width of the side surface of the head.

The protrusion may further include a groove formed in a width direction perpendicular to the side surface of the head.

Next, the insert nut consisting of a nut portion provided with a screw thread on the inside and a head portion extending on the upper surface of the nut portion so that the screw portion can be fastened, characterized in that it comprises a plurality of protrusions protruding to the side of the head portion; It provides an insert nut with improved coupling force.

Insert bolts and nuts with improved binding force according to the present invention has the effect of improving the torque by increasing the contact load with the plastic by adding a protrusion to the head of the bolt and nut is inserted into the plastic injection and press products.

In addition, the insert bolt and nut with improved coupling force according to the present invention increases the contact surface constrained in the direction of torque rotation due to the addition of the protrusion has the effect of preventing the problem of being separated from the synthetic resin mold or spaced apart.

1 is a view schematically showing an insert bolt and nut with improved coupling force according to an embodiment of the present invention,
2 and 3 is a configuration diagram of the insert bolt to improve the binding force according to an embodiment of the present invention,
4 and 5 is a block diagram of the insert nut to improve the binding force according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings it will be described with respect to the insert bolt and nut improving the bonding force of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and provided to fully inform the scope of the invention to those skilled in the art. It is intended that the invention be defined only by the scope of the claims.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a view schematically showing an insert bolt and nut with improved coupling force according to an embodiment of the present invention.

Referring to FIG. 1, the shape of the insert bolt 10 and the insert nut 20 in which the bonding force is improved is embedded in the synthetic resin mold S that is injection molded.

The insert bolt 10 and the insert nut 20 having improved coupling force will be described in order.

First, the insert bolt 10 having improved coupling force will be described.

The insert bolt 10 is one of the important mechanical elements as an interconverting element between the rotational motion and the linear motion, and an exercise screw for obtaining a large axial force with a small rotational moment.

As the configuration of the insert bolt 10, a screw portion 12, a head portion 30 extending on the upper surface of the screw portion 12, and a plurality of protrusions protruding from the side surface of the head portion 30 And 40.

The screw portion 12, the circumference of the body is round, the thread is provided on the outer circumference.

Such a screw portion 12 is hollowed with a groove that continues to rotate in one direction in a cylindrical shape. At this time, it has an unevenness (not shown) that comes outward and has a portion that enters inside. A projecting outward part is called a `` goal '' where a `` pitch '' represents the distance between the mountain and the mountain (or valleys and valleys) in the axial direction of the screw. Indicate the specifications of The smaller the pitch, the tighter the thread spacing and the stronger the bonding force.

The head portion 30 formed on the upper surface of the screw portion 12 is integrally formed to extend. In general, the head 30 is in the form of a polyhedron or a hexahedron, but this is the insert bolt 10 is rotated by the rotational force applied in the process of fastening the nut to the insert bolt 10, the synthetic resin mold ( Separation or separation from S) can lead to problems.

In addition, this separation phenomenon is caused because the contact surface constrained in the torque rotation direction is small.

Therefore, conventionally, in order to prevent this, the bracket may be fixed to the insert bolt 10 head 30 by welding.

However, in this case, there is a problem that the working time is delayed for a long time due to welding the insert bolt 10 one by one.

Therefore, in the present invention, a plurality of protrusions 40 protruding to the side of the head portion 30 of the insert bolt 10 is added.

As described above, the protrusion 40 extends laterally in a general hexahedral form of the head 30 and has a feature of increasing bonding force when injection is embedded.

At this time, it is preferable that the protrusion part 40 protrudes perpendicular to the side surface of the head part 30.

In addition, it is preferable that the friction contact in the torque rotation direction, it is preferably formed narrower than the width of the side of the head (30).

Next, the insert nut 20 which improved the coupling force is demonstrated.

The insert nut 20 includes a nut part 22, a head part 30 extending on an upper surface of the nut part 22, and a plurality of protrusion parts 40 protruding from the side surface of the head part 30. ).

The nut part 22 is provided with a screw thread inside so that the said screw part 12 can be fastened.

This nut portion 22 is grooved to continue to rotate in one direction on the inner side corresponding to the thread of the bolt to be fastened. At this time, it has an unevenness (not shown) that comes outward and has a portion that enters inside.

The head portion 30 formed on the upper surface of the screw portion 12 is integrally formed to extend. In general, the head portion 30 is in the form of a polyhedron or a hexahedron, but this is the insert nut 20 is rotated by the rotational force applied in the process of fastening the bolt to the insert nut 20, the synthetic resin mold ( Separation or separation from S) can lead to problems.

In addition, this separation phenomenon is caused because the contact surface constrained in the torque rotation direction is small.

However, in this case, there is a problem that the working time is delayed for a long time due to welding the insert nut 20 one by one.

In order to solve this problem, a solution point has been sought from various angles. In the present invention, the protrusion part 40 is added to the head part 30 of the insert bolt 10 and the insert nut 20.

More specifically, the method of attaching the insert bolt 10 and the insert nut 20 to a base material made of synthetic resin or wood may be a method of injecting the mold after being installed in the mold, or press-fitting if the injection is impossible. . Regardless of the installation method, the insert bolt 10 and the insert nut 20 should be attached to the base material as wedges.

Therefore, the present invention, as described above, the insert bolt 10 and the insert nut 20 has the effect of improving the bonding force by adding the projection 40 to the side.

2 and 3 show the configuration of the insert bolt to improve the binding force according to an embodiment of the present invention.

Reference will be made to FIGS. 2 and 3 at the same time.

First, referring to FIG. 2, the insert bolt 10 protrudes orthogonally to a threaded portion 12, a head portion 30 extending from an upper surface of the threaded portion 12, and a side surface of the head portion 30. It is formed of a protrusion 40.

As shown, a protrusion 40 has been added in the shape of a typical insert bolt 10. The protrusions 40, the cross-sectional shape seems to be formed in a square shape, but this cross-sectional shape is firm when the insert bolt 10 is embedded in the synthetic resin mold (S in Fig. 1) is injection molded, the position and It is merely one exemplary shape for further strengthening the posture, and the present invention need not be limited to this shape.

Therefore, it is embedded in the synthetic resin mold (S of FIG. 1) more stably through various embodiments, the ellipse, triangular, pentagon, trapezoid which is a shape that can increase the contact surface in the rotation direction with the synthetic resin mold (S of Figure 1). Modifications are possible in various forms, such as in cross-sectional shape.

In addition, when the insert bolt 10 is embedded in the synthetic resin mold (S of FIG. 1) to be injection molded, it is preferable that the shaking is made in a form that is limited to withstand torque.

To this end, the protrusion 40 of the insert bolt 10 can be improved in the ability to withstand torque by increasing the number.

At this time, it is usually advantageous to apply two or more of the protrusions 40.

Therefore, by adding the protrusion 40, the contact surface that is restrained in the torque rotation direction is increased, thereby being separated from the synthetic resin mold (S in FIG. 1) or spaced apart to improve the bonding force that prevents the problem. .

Referring next to FIG. 3, the same purpose as the insert bolt 10 of FIG. 2, but there are differences in configuration.

In FIG. 2, if the torque is improved by protruding the protrusion 40 in the form of an embossment, the insert bolt 10 in FIG. 3 may improve the torque by adding the groove 50 in the form of an intaglio. .

At this time, the groove portion 50 of the insert bolt 10 is preferably perpendicular to the side surface of the head portion 30, the groove is formed in the width direction.

The intaglio insert bolt 10, although the configuration and shape are different, there is an advantage that can improve the torque in the same way.

4 and 5 show the configuration of the insert nut to improve the binding force according to an embodiment of the present invention.

This will be described with reference to FIGS. 4 and 5 simultaneously.

First, referring to FIG. 4, the illustrated insert nut 20 includes a nut part 22, a head part 30 extending on an upper surface of the nut part 22, and the head part 30. It is formed of a plurality of protrusions 40 protruding from the side.

As shown, a protrusion 40 has been added in the shape of a typical insert nut 20. As mentioned in the insert bolt 10 described above, the projection 40 of the insert nut 20 appears to have a cross-sectional shape of a square shape, this cross-sectional shape is such that the insert nut 20 is a synthetic resin mold (S of FIG. 1). It is only one exemplary shape to be firmly embedded when injected into the injection, to further solidify the position and posture, the present invention need not be limited to this shape.

Therefore, it is embedded in the synthetic resin mold (S of FIG. 1) more stably through various embodiments, the ellipse, triangular, pentagon, trapezoid which is a shape that can increase the contact surface in the rotation direction with the synthetic resin mold (S of Figure 1). Modifications are possible in various forms, such as in cross-sectional shape.

In addition, by adding the protrusion 40 to the head 30 as in the insert bolt 10 described above, there is an effect of improving the ability to withstand torque.

At this time, the protrusion 40 may improve the ability to withstand torque due to the increased number.

In addition, it is usually advantageous to apply two or more of the protrusions 40.

Therefore, by adding the protrusion 40, the contact surface that is restrained in the torque rotation direction is increased, thereby being separated from the synthetic resin mold (S in FIG. 1) or spaced apart to improve the bonding force that prevents the problem. .

Next, referring to FIG. 5, in FIG. 4, if the insert nut 20 protrudes the protrusion 40 in an embossed form to improve torque, the insert nut 20 in FIG. It is also possible to improve torque by adding 50).

At this time, the groove portion 50 of the insert nut 20 is preferably orthogonal to the side surfaces of the head portion 30, the groove is formed in the width direction.

In addition, although the configuration and shape of the insert bolt 10 of the intaglio form is different, there is an advantage that can improve the torque in the same way.

Accordingly, the insert bolt 10 and the insert nut 20 having improved binding force according to the present invention may be provided with the protrusion 40 and the groove 50 at the head 30 of the bolt and nut inserted into the plastic injection and press product. In addition, by increasing the contact load with the plastic, there is an effect of improving the torque.

In addition, the insert bolt 10 and the insert nut 20 having improved binding force according to the present invention increase the contact surface constrained in the direction of torque rotation by adding the protrusion 40 and the groove 50 to the synthetic resin mold (FIG. 1). It is effective to prevent the problem of being separated from or separated from S).

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments and can be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

In addition, the scope of the present invention is indicated by the claims to be described later than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present invention. Should be interpreted as

10: Insert bolt
12: screw part
20: insert nut
22: nut part
30: head
40: protrusion
50: groove
S: Synthetic Resin Mold

Claims (10)

In the insert bolt consisting of a threaded portion provided with a screw thread on the outer circumference of the body and a head extending on the upper surface of the screw portion,
It includes a plurality of protrusions protruding on the side of the head,
The head is inserted into the synthetic resin mold, the circumference of the head is made of a polygonal surface,
The protrusion is formed in two protruding sides adjacent to each other in the head portion is an insert bolt to improve the coupling force, characterized in that the frictional contact in the torque rotation direction.
The method of claim 1,
The protruding portion
Insert bolts to enhance the bonding force, characterized in that protruding perpendicular to the side of the head.
delete The method of claim 1,
The width of the projection is,
Insert bolts to improve the coupling force characterized in that the narrower than the width of the head side.
The method of claim 1,
The protruding portion
Insert bolts to improve the bonding force further comprises a groove formed in the width direction perpendicular to the side of the head.
In the insert nut consisting of a nut portion provided with a screw thread on the inside and a head portion extending on the upper surface of the nut portion so that the screw portion can be fastened,
It includes a plurality of protrusions protruding on the side of the head,
The head is inserted into the synthetic resin mold, the circumference of the head is made of a polygonal surface,
The protruding portion has an insert nut which is formed to protrude on two polygonal surfaces adjacent to each other in the head and is in frictional contact in a torque rotation direction.
The method according to claim 6,
The protruding portion
Insert nut with improved coupling force characterized in that the projecting perpendicular to the side of the head.
delete The method according to claim 6,
The width of the projection is,
Insert nut with improved coupling strength, characterized in that formed narrower than the width of the side of the head.
The method according to claim 6,
The protruding portion
Insert nut to improve the bonding force further comprises a groove formed in the width direction perpendicular to the side of the head.

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