KR20070113015A - A structure of a flush-mounting expansible fastening means and method for forming it - Google Patents

Abstract

A structure of a flush-mounting expansion fastening unit and a method for forming the same are provided to facilitate the manufacturing process of the flush-mounting expansion fastening unit. A method for forming a flush-mounting expansion fastening unit comprises the steps of defining a thread area, and forming at least one groove at a position in which a thread is molded. At least one inverse anchor(30) is formed through a pressing process when the slope of the product is defined. The thread is formed according to the required dimension thereof when a thread forming area is defined. The product has a slope angle of at least 1 degree when the slope of the product is defined. The thread area is U-shaped. The thread area is spirally formed. The product is obtained by cutting the material, and the manufacturing process is performed through a continuous press molding.

Description

A STRUCTURE OF A FLUSH-MOUNTING EXPANSIBLE FASTENING MEANS AND METHOD FOR FORMING IT}

1 is a three-dimensional view of an adjustment screw (bolt) of the known art.

Figure 2 is a three-dimensional view of another kind of adjusting screw (bolt) of the known art.

Figure 3 is a three-dimensional view of another type of commercial adjustment screw (bolt) of the known art.

Figure 4 is a three-dimensional view of the buried expansion fastener of the present invention.

Figure 5 illustrates the fastening of the buried expansion fastener and the bolt of the present invention.

Figure 6 is a view showing a fastening state of the buried expansion fastener and the bolt of the present invention.

7 is a view showing a fastening state of the buried expansion fastener and the bolt of the present invention.

8 is a view showing a fastening state of the buried expansion fastener and the bolt of the present invention.

9 is a view showing a fastening state of the buried expansion fastener and the bolt of the present invention.

10 is a view showing a molding process of the buried expansion fastener of the present invention.

11 is a view showing a molding process of the buried expansion fastener of the present invention.

12 is a view showing a molding process of the buried expansion fastener of the present invention.

Figure 13 illustrates a molding process of the buried expansion fastener of the present invention.

Figure 14 illustrates a molding process of the buried expansion fastener of the present invention.

15 is a view showing a molding process of the buried expansion fastener of the present invention.

Figure 16 illustrates a molding process of the buried expansion fastener of the present invention.

Figure 17 illustrates a molding process of the buried expansion fastener of the present invention.

[Explanation of symbols on the main parts of the drawings]

10: fastener 12: inner hole

14: annular thread 16, 17, 18: occlusal

20: Gage Section 22: Slope Section

24: molding compartment 26: groove

30: backlock 40: screw (bolt)

50: workpiece 51: hole

60: fastening device

1: protruding ear

62: inlet

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a buried expansion fastener and a method for forming the same, in which a machine screw (bolt) or a male member is screwed in to securely adhere to a workpiece by the movement of expansion expansion.

Commercially available adjustment screws (bolts) or embedded bolts are used for processing means such as plastic molding, zinc aluminum alloy die cast molding, cutting, cold forging and cutting pipe combinations, cold forging and press plates, and expansion members. By.

However, the processing related equipment of such related products is complicated, the number of parts is high, and the material consumption is large. Since the experience of using the adjusting screw (bolt) or the buried screw (bolt) is almost unexpectedly unfolded as expected, the adjusting screw (bolt) of the main body generates a revolution, and a fitting effect cannot be obtained.

The embedded nails of plastic molding shown in FIG. 1 have the disadvantage of high mold cost and long production time, while having low material cost and anti-rust characteristics. In particular, because the plastic material is flexible and there is little bite and friction on the workpiece, the tensile strength, tensile strength and weight support are weak. The adjusting screw (bolt) of the body is easily peeled off.

On the other hand, the buried adjustment bolt by die-cast molding has a large number of parts, and requires a lot of thread cutting and assembly costs. The main drawback is the limitation of the materials used. Machining performance of the product is poor because it uses cold rolled wire (plate).

The groove cutting speed for the production and secondary processing of cutting adjustment screws (bolts) or embedded bolts (Fig. 2) is slow and material loss is high. In particular, the cutting adjustment screw (bolt) must carry out expansion and expansion using a bolt having a new inclined surface as an accessory. As another drawback, the cutting member uses a free cutting material. When the expansion starts, the adjusting screw (bolt) of the main body, such as exceeding the resistive force or not having the expansion expansion function, generates an idle when attaching the bolt, and fastening is not possible. Therefore, it is not suitable for assembly work or DIY use.

The adjustment screw (bolt) of the combination of cutting pipe materials for cold rolling is currently most widely used in civil engineering, fertilization, suspension, and fixing works. The part consists of a screw (bolt) which has an inclined surface, a metal pipe of a cutting groove processing, a flat seat, and a screw (bolt). There are two ways of construction. One method is to suspend the screw (bolt) in the rear end of the adjusting screw (bolt), and then fasten the screw (bolt) by inserting it into the hole opened in the temporary work, and cutting the inclined head portion of the screw (bolt). It is a method of expansion and expansion by press-fitting into a metal cover tube. However, since the resistive force at the time of expansion development is large, it fails by exceeding the resistive force of the adjustment screw (bolt) main body, and when the adjustment screw (bolt) main body is pressed, the head part becomes high gradually, and a revolution occurs and it falls out. Another method is to suspend the screw (bolt) to the rear end of the screw (bolt) of the adjusting screw (bolt), and then type it into the hole opened in the temporary work, and then remove the screw (bolt) and the spring washer from the body and screw it. (Bolt) A press-cut grooved metal cover tube is press-fitted using a larger cover tube, pressed by an inclined surface head portion of a screw (bolt), and expanded and expanded to realize the purpose of tightening. However, due to the inconsistency of the depth of the opening of the construction work due to inflexibility and failure of the material inside the hole, it is weakened by eliminating the support point of the adjusting screw (bolt). If the adjusting screw (bolt) is continuously hit on one side, it will be buried deeply and will generate an idle and become unusable. As described above, the use strength of this type of product combination is consistent with the construction conditions, but the number of parts of the combination member of the adjusting screw (bolt) main body is high, and a high construction amount is required. In addition, if carelessness can be achieved, the completeness of the construction can not be achieved.

On the other hand, the adjustment screw (bolt) combined with the cold rolling press plate expansion member is an improvement of the adjustment screw (bolt) combined with the cutting member in cold rolling, as shown in FIG. The combination of the components is almost the same, and the cutting pipe member is replaced with the press plate expansion member to lower the cost, improve the resistance at the time of expansion development, and improve the engagement and friction of the workpiece. Another type of product is the expansion of the press plate expansion member by fastening the nail to the adjusting screw (bolt) body, and then using the bolt of the inclined surface head. Alternatively, a bolt of an inclined surface head portion equal to a screw (bolt) dimension inside the press plate expansion member is tightened and tightened, thereby achieving the purpose of expansion. However, this kind of product itself has the drawback that the processing process is complicated.

The inventor has been engaged in hardware fasteners for a long time; A continuous mold is used to make the metal plate continuous, and an annular machine thread is installed in the inner hole, and an occlusal value with different heights and shapes is installed on the outside to realize the angle change logic by the inclined surface method. When fastening the screw (bolt) or the male member, it is possible to prevent the idle or prevent escape. On the other hand, in the combined member, since there are many standards and types of commercially available various machining screws (bolts), it can be easily obtained and the cost is low. The functionality and construction workability are superior to the various adjustment screws (bolts) on the market. In particular, the manufacturing process can be simplified and the accessories can be easily obtained by the reduction and selection of materials, and the completeness of the construction and the total construction cost are low and high evaluation can be obtained.

Conventional adjustment screws (bolts) or embedded bolts have many disadvantages such as many accessories, high construction capacity, and tensile force, tensile strength and weight calculations cannot be quoted except by the electrician; According to the present invention, one kind of manufacturing process is simple, the production time is short, the material consumption is low, the selectivity is varied, the production process is small, the accessories are easy to obtain, the construction and use are convenient, and the construction success rate is 100. %, Shorten construction period, provide low-cost bolts for products and construction.

In order to achieve the object as described above, the present invention mainly uses a molding technology in which a combination of a press and forging is used to form a fastener having a cylindrical shape by pressing a cold rolled coil. An annular machine thread is installed in the inner hole of the fastener, an inclined surface is provided on the inside, and an occlusal tooth having a different height and shape is molded outside. When attaching a screw (bolt) or male member having a proper length and dimension, when the screw is screwed in and presses against the annular inclined surface in the inner hole, the fasteners having the inclined surface in the inner side are expanded and developed outwards until now. According to the change of the inclination, it extends to the outside to form an umbrella shape, and realizes the joining effect on the workpiece.

The molding procedure of the continuous press forming technology of the fastener of the present invention will be described in detail as follows.

(1) The waste material is cut to the required dimensions of the product, and the angle of inclination compartment required for two or more product materials is obtained.

(2) Indent one or more grooves in the thread-forming compartment vertically below the 90 ° crosshairs.

(3) Compress the occlusal teeth with different inclination or inclination angle in the angular slope of the product.

(4) Repress required thread dimensions of the product.

(5) The angle of inclination of 1 ° or more is pressed into the inclination angle section of the product material.

(6) In the thread section of the product material, the U shape is pressed.

(7) In the thread section of the product material, the round shape is wound up.

(8) Cut the material compartment and get the product.

The invention of claim 1 comprises the steps of cutting to the dimensions of the material required for the product, acquiring the angular slope sections required for the two or more product materials, defining thread sections, and cutting one or more grooves into the thread forming sections. Pressing step, pressing one or more backlocks in the angular slope of the product, pressing a required dimension of the thread in the thread forming section, and pressing an angle of 1 ° or more in the inclined angle section of the product material. And a step of pressing the U shape in the thread section of the product material, winding the round shape in the thread section of the product material, cutting the material section to obtain a product, and performing continuous press molding. It is a molding method of the buried expansion fastener comprising the above construction sequence.

The invention of claim 2 is characterized in that the groove is pressed against the thread forming section in the vertical direction of the crosshair of 90 °.

The invention of claim 3 forms a structure of a kind of expansion fastener, a staff cylindrical, installs an inner hole in the fastener, installs an annular screw thread in the inner hole, the inner hole is drawn inward to install an inclined surface, A buried expansion fastener structure, characterized in that at least one bite is provided on the outside thereof.

The invention of claim 4 is characterized in that the fastener bends the metal plate in a round shape.

The invention of claim 5 is characterized in that a plurality of bite teeth having different heights and shapes are provided outside the fastener.

The invention of claim 6 is characterized in that the outside of the fastener is provided with one or more locking compartments.

The invention of claim 7 is characterized in that a protruding ear portion is provided in the fastener, and an inlet portion for fastening the protruding ear portion is provided on the opposite side.

Fig. 4 is a three-dimensional view of the buried expansion fastener 10 of the present invention after molding is completed, showing a machine screw (bolt) 40 or a male member having an appropriate length and dimension. FIG. 5 is a view showing a state where the screw (bolt) 40 or the workpiece is fastened inside the buried expansion fastener 10. As shown, the fastener 10 is to round the metal plate to form a staff barrel. The fastening device 60 is installed on the fastener 10, and the fastening ear shape 61 on the opposite side to the fastening ear shape 61 on the opposite side finishes the metal plate roundly, and then pulls in the fastening device. The unit 62 is installed. An inner hole 12 is provided in the fastener 10, and an annular thread 14 is provided in the inner hole 12. In addition, the fastener 10 is provided with an inclination drawn in the inner side, and one or more bite teeth 16 on the outer side. In this figure, a plurality of occlusal teeth 16, 17, 18 having different heights and shapes are provided outside the fastener 10, and the outside of the fastener 10 has one or more locking compartments 20 Install).

By this structure, the annular machine thread 14 is provided in the inner hole 12 of the fastener 10, and the outer surface is provided with bite teeth 16, 17, 18 having different heights and shapes, and inclined surfaces. By the technique of the inclination angle modified logic to achieve and to achieve the fastener 10 of the novel structure. 6 to 9 are cross-sectional views and partial cross-sectional views of the fastener 10 before the work 50 enters the work 50 and after the work 50 is fastened. At the time of construction, open the hole 51 in which the fastener 10 enters the work piece 50, and install a machine screw (bolt) 40 or a male member of an appropriate length and dimension in the fastener 10. When locked in the inner hole 12, the inclination angle of the inner hole 12 is rapidly expanded and developed by the fastening of the thread 14 to open and fasten the fastener 10, and expand and expand to the outside. The occlusal teeth 16, 17, and 18 which differ in shape are unfolded in the form of an umbrella to the outside by the change of the inclination, and engage the work 50 to realize the fastening effect.

The fastener 10 of the present invention uses a continuous press molding technique. The specific molding procedure is shown in Figs. From the waste material, it cuts out with the material dimension required for the product, and acquires the angular inclination compartment 22 necessary for two or two or more product materials (FIG. 10). Then, one or more grooves 26 are cut in the thread-forming section 24 in the vertical direction of the 90 ° crosshairs (Fig. 11). After completion of the above procedure, the inclination block 30 or the bite values 16, 17 and 18 having different inclination angles are pressed into the angular inclination sections of the product, and then bent outside thereof (Fig. 12). The required threaded dimension of the product is then pressed (FIG. 13). Finally, an angle of 1 ° or more is formed in the inclination angle section 22 of the product material (Fig. 14).

After completing the above procedure, the U shape is pressed into the threaded section 24 of the product material (Fig. 14). Next, a round shape is wound around the threaded section 24 of the product material (Fig. 16). Thereafter, the thread-fold molding section 24 necessary for the product material is molded, the fastening device 60 is fastened, and the fastener 10 is molded (Fig. 17). Finally, the burr zone is cut out to complete the fastener 10 after press molding.

As described above, since the fastener of the present invention is integrally press-molded by combining the press molding technique with a mating technique and a generally used member and the design of a precise continuous press die, the fastener is fastened to the annular fastening thread portion of the fastener of the product. The device is pressed and the thread is opened by the twisting of the male member to prevent looseness during construction. In addition, after installing and buried one or more locking compartments outside the product, when tightening the external force (foreign material), there is no support point to prevent the rotation. In addition, the inner hole of the lower part (rear part) of the product is provided with an annular screw thread by press working, an inclined surface is provided inside the main body, and an occlusal tooth having a different height and shape is provided outside to form a staff cylinder. When constructing, fasten the machine screw (bolt) or male member of the appropriate length and dimension, press the inclination angle of the inner hole to open the inner hole with the original inclination angle at the time of expansion development, In addition to deforming to a cylindrical shape, the occlusal teeth having different original heights and shapes are expanded to the outside by an alteration of the inclination angle to form an umbrella, and the workpieces are bonded to each other to realize a fastening effect.

In addition, the fastener is integrally formed by press molding, so that the production process of the product is simple and the production is quick. In particular, because of the material savings and various selectivity, the number of production processes can be reduced, accessories can be easily obtained, construction achievement rate is 100%, and construction time can be shortened. The features and effects of the present invention are clear, such as lowering the total cost of products and construction.

The production process of the product of the present invention uses a metal cold rolled coil, combined with precise continuous press mold design press molding technology, realizes press molding integrally, and the production process is simple and the production speed is realized.

Since the product of the present invention can use a general metal member according to various uses, it has various material selectivity.

The product of the present invention is formed by press molding integrally with a metal cold rolled coil; For various metal adjusting screws (bolts) or embedded bolts of the known technology, compared to cutting adjustment screw (bolt) component accessories and cold forging adjusting screw (bolt) component accessories cutting embedded bolts, The difference is clear. Cutting adjustment screw (bolt) parts accessory cuts round bar, cuts groove by secondary processing, and combines inclined surface head part of cold forging molding. The adjustment screw (bolt) part accessory of cold forging molding forms the inclined head part by cold forging from a round wire rod, and combines many accessories. The buried bolt is a round bar cut.

Since the product of the present invention is integrally press-molded, the cutting adjustment screw (bolt) component accessories are cold forged molding adjustment screw (bolt) component accessories, cutting buried bolts, production process, secondary machining and accessories are clearly reduced Do.

The product of the present invention can easily obtain the construction parts, select a machine screw (bolt) or a male member having a suitable length and dimensions as a whole, and has a variety of selectivity, the combination is superior to the products of the known art .

According to the present invention, the effect of fastening fasteners can be realized by fastening the product by attaching it to a hole opened in a temporary work (twisting), and then attaching a machine screw (bolt) or a male member of an appropriate length and dimension. Since the demand for the construction capacity does not increase, the construction and use are very convenient and the construction period can be shortened.

The product of the present invention is screwed into the machine screw (bolt) or male member of the appropriate length and dimensions during construction, the thread is pressed on the inclined surface of the inner hole, and the expansion of the original inclined inner hole to the outside when expanding the expansion of the staff tube Form. Therefore, the bite is different from the conventional height and shape is extended to the outside in accordance with the change of the inclination to engage the workpiece in the form of an umbrella to realize the fastening effect, so that looseness due to idle is hardly generated. Since the product of the present invention abuts the female member, the machine screw (bolt) or male member used in combination is a screw (bolt) or a buried bolt like a metal adjusting screw (bolt) or a buried bolt of a known technique after completion of construction. It does not protrude from the thread trailing edge of. Therefore, it is effective in stability and aesthetics. Moreover, after fastening a workpiece | work, it has constant density and unity.

The buried expansion fastener of the present invention has the same effect even if the location is marked at the construction stage, and the hole is opened (type), or the drilling and type (twisting) are performed in one construction. A feature of the design of the present invention is to use a mechanical screw (bolt) of an external force (outer member) for expansion and development in the post-construction process, and extend the inner hole of the original inclined surface to the outside to form a staff cylinder. In addition, the occlusal teeth different from the original height and shape are extended to the outside by the change of the inclination, and are engaged with the workpiece in the form of an umbrella to realize the fastening effect.

As described above, the product of the present invention has a simple production process, shortens the production time, saves material by integrated press molding, simplifies the production process by various selectivity, and has a large reduction. In addition, it is easy to obtain accessories, the completion rate of construction is 100%, and the effect on the total cost of users and construction, such as shortening the construction period, is clear.

The present invention relates to a structure and a molding method of a buried expansion fastener, the product of the present invention is a simple production process, shorten the production time, save material by integral press molding, and simplify the production process by various selectivity To achieve, and its relief is large. Moreover, the accessories are easy to obtain, the construction achievement rate is 100%, and the effects on the user and the total cost of construction are remarkable, such as shortening the construction period.

Claims (7)

Cutting to the material dimensions required for the product, acquiring angular slope sections for two or more product materials, defining thread sections, Inserting one or more grooves into the threaded forming compartment, Pressing at least one backlock on the angular slope of the product, Pressing the required dimensions of the thread in the thread forming compartment, Pressing an angle of 1 ° or more into the inclination angle section of the product material, A threaded section of a product material, the method comprising: pressing a U shape, In a threaded section of the product material, winding the round shape, A method of forming a buried expansion fastener comprising cutting the material compartment to obtain a product and including the construction procedure by continuous press molding. The method of forming a buried expansion fastener according to claim 1, wherein the groove is pressed against the thread forming section in a vertical direction of a crosshair of 90 degrees. Form a structure of a kind of expansion fastener, a cylindrical tube, install an inner hole in the fastener, install an annular thread in the inner hole, the inner hole is drawn inward to install a slope, and at least one outside A buried expansion fastener structure, characterized in that the bite is provided. The buried expansion fastener structure of claim 3, wherein the fastener bends the metal plate in a round shape. The buried expansion fastener structure according to claim 3, wherein a plurality of bite teeth having different heights and shapes are provided outside the fastener. The structure of a buried expansion fastener according to claim 3, wherein the outside of the fastener is provided with one or more locking compartments. The buried expansion fastener structure according to claim 3, wherein a projection ear portion is provided at the fastener, and an inlet portion for fastening the projection ear portion is provided at an opposite side.

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