JP2007285476A - Structure of embedded expansion fastener and molding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of an embedded expansion fastener and its molding method. <P>SOLUTION: A straight cylinder is finished by the structure of a kind of embedded expansion fastener, its production method and the press working. The inner hole of the fastener is press worked to form an annular machine screw thread, and meshing gear teeth having a different a height and shape is formed by forming a slant face in the inside. When a screw thread (bolt) or a male member of a suitable length and dimension is attached, the thread is screwed and pressed against the slope in the inside, and the fastener having the slant face in the inside is expanded to the outside. As the slope angle changes, the meshing gear teeth forms an umbrella shape and realizes the biting effect to a work piece. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a structure and a molding method of a kind of embedded expansion fastener, and has an effect of screwing a mechanical screw (bolt) or a male member and firmly engaging the workpiece by the function of expansion and deployment.

  Adjustment screws (bolts) or embedded bolts currently on the market are processed plastic molding, zinc-aluminum alloy die casting, cutting, combination of cold forging and cutting tube material, expansion member combining cold forging and press plate, etc. By means.

  However, the processing related equipment of the related products is complicated, the number of parts is large, and the material consumption is large. Most of the failure experience of using an adjustment screw (bolt) or embedded screw (bolt) does not deploy as expected, causing the adjustment screw (bolt) of the body to slip and lose its biting effect.

  The plastic-molded embedded nail shown in FIG. 1 has a low material cost and has a non-rusting property, but has a disadvantage that the mold cost is high and the production time is long. In particular, since the plastic material is soft and the bite and frictional force against the workpiece are small, the tensile force, tensile strength and weight resistance are also weak. The adjustment screw (bolt) of the main body can be easily pulled out.

  On the other hand, embedded adjustment bolts by alloy die casting have a large number of parts, and have high thread cutting and assembly costs. The main drawback is that the materials used are limited. Product machining performance is inferior to products using cold rolled wire (sheet).

  Growing speed is slow in the production and secondary machining of cutting adjusting screws (bolts) or embedded bolts (FIG. 2), and material wear is high. In particular, the cutting adjusting screw (bolt) must be inflated and deployed with a bolt having a new inclined surface as an accessory. Another disadvantage is that the cutting member uses a free-cutting material. When inflating and deploying, the adjustment screw (bolt) of the main body causes slipping when the bolt is attached, such as exceeding the resistance force or not having an inflating and deploying function, and cannot be fastened and fixed. For this reason, it is not suitable for assembly work or DIY use.

  Adjustment screws (bolts) combined with cutting pipes for cold rolling are currently used most often in civil engineering work, modification, hanging, and fixing equipment. The part is composed of a screw (bolt) having an inclined surface, a metal tube with a slit groove, a plain washer, and a screw (bolt). There are two methods of construction. One is to lower the screw (bolt) to the tail part of the adjustment screw (bolt) body, and then drive it into the hole opened in the temporary work, tighten the screw (bolt), and cut the head of the inclined surface of the screw (bolt). It is press-fitted into a grooved metal sleeve and expanded. However, when expanding and deploying, because the resistance force is large, the adjustment screw (bolt) body fails due to excessive resistance force, and when the adjustment screw (bolt) body is compressed, the head gradually becomes higher, causing idling I get out. The other method is to lower the screw (bolt) to the tail end of the adjustment screw (bolt) body, and then drive it into the hole opened in the temporary work, and then remove the screw (bolt) and spring washer from the body. The metal sleeve is cut into a grooved groove using a cannula larger than the screw (bolt) and pressed and inflated and deployed by the head of the inclined surface of the screw (bolt) to achieve the fastening purpose. However, due to the mismatch of the depth in the drilling of the temporary work, it fails because the material inside the hole or the hole is soft, so that the supporting point of the adjusting screw (bolt) is lost and it becomes weak. If the adjustment screw (bolt) is continuously sprinkled on one side, it will be buried deeper and will not be used due to idling. As described above, the use strength of this type of product combination matches the construction conditions, but the number of combination members of the adjusting screw (bolt) main body is large, and the demand for the construction skill is high. A little carelessness cannot achieve the completeness of construction.

  On the other hand, the adjustment screw (bolt) combined with the plus plate expansion member for cold rolling is an improved product of the adjustment screw (bolt) combined with the cutting member for cold rolling as shown in FIG. The combination of the components is almost the same, and the cutting tube material is replaced with a press plate expansion member, reducing the cost, improving the resistance force when expanding and deploying, and improving the occlusion and friction force of the workpiece. In another type of product, a press plate expansion member is clamped to an adjustment screw (bolt) body, and then inflated and deployed using a bolt at the head of an inclined surface. Or the bolt of the inclined surface head same as a screw (bolt) dimension is driven in the inside of a press plate expansion member, and it tightens and implement | achieves the objective of expansion | deployment deployment. However, this type of product itself has the disadvantage of complicated processing steps.

  The present inventor has been engaged in the metal fastener industry for many years, with metal plates made of continuous dies, with continuous press working technology, an annular machine screw thread is provided in the inner hole, and the external occlusal teeth with different height and shape By using the inclined surface technique, the angle modification logic can be realized, and it is possible to prevent slipping or slipping out after finishing an independent fastener and tightening a screw (bolt) or a male member. On the other hand, since there are many standards and types of commercially available machined screws (bolts) for the members to be combined, they can be easily obtained and their cost is low. It is superior to various commercially available adjustment screws (bolts) in terms of functionality and workability. In particular, it saves and selects materials, simplifies the manufacturing process, makes it easy to acquire accessories, has low construction completeness and low total construction costs, and deserves a high reputation.

  The present inventor is a kind of manufacturing for the shortcomings that there are many accessories for existing adjusting screws (bolts) or embedded bolts, the demand for construction work is high, and the tensile force, tensile strength and weight calculation can only be estimated by a specialist. Simple process, short production time, low material consumption, wide range of selectivity, few production processes, convenient access to accessories, convenient installation and use, construction success rate of 100%, shortened construction period, product Provide embedded bolts with a low total construction cost.

  In order to achieve the above object, the present invention mainly forms a straight cylindrical fastener by pressing a cold-rolled coil using a molding technique that combines pressing and forging. An annular mechanical thread is provided in the inner hole of the fastener, an inclined surface is provided on the inner side, and occlusal teeth having different heights and shapes are molded outside. When attaching a screw (bolt) or male member of appropriate length and size, when screwing in the screw, pressing the annular slant into the inner hole, the fastener with the inclined surface on the inside will expand and deploy outward The occlusal teeth are extended to the outside in accordance with the change of the inclination to form an umbrella shape, thereby realizing the effect of biting the workpiece.

The molding procedure of the continuous press working molding technology of the fastener of the present invention will be described in detail as follows.
(1) Cut to the material size required for the product from the waste material, and obtain two or more angle oblique areas required for the product material,
(2) Cut one or more grooves in the thread forming area, perpendicular to the 90 degree crosshairs,
(3) Pressing back latches or occlusal teeth with different oblique angles in the obliquely angled area of the product,
(4) The required thread dimensions of the product are pressed.
(5) Mold an angle of 1 degree or more in the oblique angle area of the product material,
(6) In the thread area of the product material, U shape is pressed.
(7) roll up a round shape in the thread area of the product material,
(8) Cut the material area and take the product.

The invention of claim 1 cuts into the material dimensions required for the product, obtains two or more angle diagonal areas required for the product material, defines the thread area,
Cut one or more grooves in the thread forming area,
In the diagonally angled area of the product, one or more back latches are pressed,
In the thread forming area, the required thread dimensions are pressed,
Press the angle of 1 degree or more in the oblique angle area of the product material,
In the thread area of the product material, U shape is pressed,
In the thread area of the product material, roll up a round shape,
The material area is cut, the product is taken, and a continuous press molding is used to form a kind of embedded expansion fastener including the above construction procedure.
The invention according to claim 2 is the molding method of the embedded expansion fastener according to claim 1, wherein the groove is pressed into a thread forming area in a direction perpendicular to a cross line of 90 degrees.
The invention of claim 3 forms a kind of expansion fastener structure, a right cylindrical shape, an inner hole is provided in the fastener, an annular screw thread is provided in the inner hole, and the inner hole is formed on the inner side. 5. An embedded expansion fastener structure characterized in that an inclined surface is provided and one or more occlusal teeth are provided outside the inclined surface. 5. The invention of claim 4, wherein the fastener is configured to bend a metal plate into a round shape. The embedded expansion fastener structure according to claim 3.
A fifth aspect of the present invention is the implantable expansion fastener structure according to the third aspect, wherein a plurality of occlusal teeth having different heights and shapes are provided outside the fastener.
According to a sixth aspect of the present invention, in the embedded expansion fastener structure according to the third aspect, the exterior of the fastener is further provided with one or more locking areas.
The invention according to claim 7 is the embedded expansion fastener structure according to claim 3, characterized in that a projection ear is provided on the fastener and a lead-in portion for fastening the projection ear is provided on the opposite side.

  The present invention is a structure and molding method of an embedded expansion fastener, and the product of the present invention is simple in production process, shortens production time, saves material by integrated press molding, and simplifies the production process by various selections. The degree of reduction is great. In addition, it is easy to obtain accessories, and the effects on users and total construction costs such as 100% construction completion rate and shortened construction period are obvious.

  FIG. 4 is a three-dimensional view after the molding of the embedded expansion fastener 10 of the present invention is completed, and shows a mechanical screw (bolt) 40 or a male member having appropriate length and dimensions. FIG. 5 is a three-dimensional combination diagram in which the screw (bolt) 40 or the workpiece is embedded and fastened inside the expansion fastener 10. As illustrated, the fastener 10 rounds a metal plate to form a right cylindrical shape. A fastening device 60 is provided on the fastener 10, and a pull-in portion 62 is provided on the fastening device 60 to be fastened after the projection ear 61 rounds the metal plate on the side opposite to the projection ear 61. An inner hole 12 is provided in the fastener 10, and an annular screw thread 14 is provided in the inner hole 12. Further, the fastener 10 is provided with a degree of inclination drawn inward, and one or more occlusal teeth 16 are provided on the outside thereof. In this figure, a plurality of occlusal teeth 16, 17, 18 having different heights and shapes on the outside of the fastener 10, and the exterior of the fastener 10 are further provided with one or more locking areas 20.

  With this configuration, an annular mechanical thread 14 is provided in the inner hole 12 of the fastener 10, and occlusion teeth 16, 17, 18 having different heights and shapes are provided on the outside. The fastener 10 having a novel structure is achieved. Continuing to refer to FIGS. FIG. 3 is a cross-sectional view and a partial cross-sectional display diagram of the fastener 10 before the workpiece 50 enters the workpiece 50 and after the workpiece 50 is fastened. At the time of construction, a hole 51 that allows the fastener 10 to enter the workpiece 50 was opened, and a machine screw (bolt) 40 or a male member having an appropriate length and size was screwed into the inner hole 12 provided in the fastener 10. When the screw thread 14 is tightened, the inclination angle of the inner hole 12 rapidly expands and expands, opens the fastener 10 and expands and expands to the outside, and the occlusal teeth 16, 17, 18 having different original height and shape. By changing the degree of inclination, it expands outside in the shape of an umbrella and engages the workpiece 50 to achieve a fastening effect.

  The fastener 10 of the present invention uses a continuous press molding technique. The specific molding procedure is shown in FIGS. The material is cut to a material size necessary for the product from the waste material, and two or more angle oblique areas 22 necessary for the product material are obtained (FIG. 10). Then, one or more grooves 26 are cut into the thread forming area 24 in the vertical direction of the 90 ° crosshair (FIG. 11). After completion of the above procedure, the back latch 30 or one or more occlusal teeth with different oblique angles are made 16, 17, 18 pressure in the obliquely inclined area of the product, and then bent outward (FIG. 12). Subsequently, the required thread dimensions of the product are produced (FIG. 13). Finally, an angle of 1 degree or more is formed in the oblique angle area 22 of the product material (FIG. 14).

  After completing the above procedure, a U shape is formed in the thread area 24 of the product material (FIG. 15). Subsequently, a round shape is wound up on the thread area 24 of the product material. (FIG. 16). After that, the thread back molding area 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 area is cut off to complete the fastener 10 after press molding.

  As described above, the fastener of the present invention is a mature technology and the design of a commonly used member and a precise continuous press mold, and is combined with the press molding technology, so that the product is fastened. The fastening device is pressed into the annular fastening thread of the tool, and the thread is opened by screwing the male member to prevent loosening during construction. Furthermore, when one or more locking areas are provided outside the product and embedded, and then external force (external object) is tightened, it is prevented from rotating because there is no support point. Also, the inner hole of the lower part (rear part) of the product is formed in a cylindrical shape by providing an annular thread by pressing, an inclined surface inside the main body, and an occlusal tooth having a different height and shape on the outside. Form. When tightening a mechanical screw (bolt) or male member of appropriate length and dimensions during construction, the screw hole is screwed in, the angle of inclination of the inner hole is pressed, expanded and deployed, and the inner hole with the original inclination angle After opening and inflating and deploying, it deforms into a cylindrical shape facing the outside, and the occlusal teeth with different original height and shape are spread out to an umbrella shape by changing the inclination angle, biting the workpiece Realize the fastening effect.

  In addition, the fasteners are manufactured by an integrated press molding, and the production process of the product is simple and the production is fast. In particular, because it has material savings and a wide range of selectivity, the number of production processes can be reduced, accessories can be easily obtained, the construction achievement rate can be 100%, and the construction time can be shortened. The total cost of products and construction is low, and the features and effects are clear.

  The production process of the product of the present invention uses a metal cold-rolled coil, combined with precise continuous press die design and press molding technology, realizes press molding in an integrated mold, the production process is simple, and the production is quick Realize.

  The product of the present invention has a wide range of material selectivity because a general metal member can be used according to various applications.

  The product of the present invention is formed by press molding from a metal cold-rolled coil in one piece. Cutting adjustment screw (bolt) component assembly and cold forging adjustment with respect to various metal adjustment screws (bolts) or embedded bolts of known technology. Compared with the screw (bolt) part assembly cutting embedded bolt, the difference in the degree of reduction of the material and the manufacturing process is obvious. A cutting adjustment screw (bolt) component assembly cuts a round bar, cuts a groove in a secondary process, and combines it with an inclined surface head of cold forging. The cold forging forming adjustment screw (bolt) component assembly forms an inclined surface head by cold forging from a round wire and combines a number of accessories. The cutting embedded bolt is obtained by cutting a round bar.

  Since the product of the present invention is press-molded in one piece, the cutting adjustment screw (bolt) component assembly is cold forging forming adjustment screw (bolt) component assembly, cutting embedded bolt, production process, secondary processing and accessory reduction Is clear.

  In the product of the present invention, construction parts can be easily obtained, and machine screws (bolts) or male members of all appropriate lengths and dimensions can be selected. Is excellent.

  According to the present invention, the effect of fixing the fastener can be realized by driving the product into a hole opened by temporary work (screwing), attaching a mechanical screw (bolt) or a male member having an appropriate length and size, and then fastening the product. Since the demand for construction skills is not high, construction and use are extremely convenient and the construction period can be shortened.

  When the product of the present invention is constructed, a machine screw (bolt) or a male member of an appropriate length and size is screwed in, the screw thread presses against the inclined surface of the inner hole, expands and expands, and the original inclined surface inner hole Is spread out to form a right cylindrical shape. Furthermore, the conventional occlusal teeth of different height and shape can be spread outwardly to bite the workpiece in the shape of an umbrella in accordance with the change in inclination, realizing a fastening effect, and no loosening due to idling occurs. Since the product of the present invention hits the female member, the mechanical screw (bolt) or male member used in combination is a screw (bolt) or embedded bolt after completion of construction, like a metal adjusting screw (bolt) or embedded bolt of a known technique. No protrusion from the back of the thread. Therefore, it is effective in safety and aesthetics. Furthermore, after the workpiece is fastened, it has a certain tightness and integrity.

  The embedded expansion fastener of the present invention is marked with a position at the temporary work stage, and is driven after being drilled (screwed), or it is driven with a fistula (screwed) in one construction, The effect is the same. The feature of the design of the present invention is that a mechanical screw (bolt) of external force (external member) is used for expansion and deployment in the post-process of construction, and the inner hole of the original inclined surface is expanded outside to form a right cylindrical shape. . Further, the occlusal teeth having different shapes from the original height are spread out to the outside in the shape of an umbrella by changing the inclination, and are engaged with the workpiece 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 a wide variety of selectability, and greatly reduces the degree of reduction. In addition, it is easy to obtain accessories, and the effects on users and total construction costs such as 100% construction completion rate and shortened construction period are obvious.

It is a three-dimensional view of a known adjusting screw (bolt). It is a three-dimensional view of another kind of adjusting screw (bolt) in the known art. It is a three-dimensional view of another kind of conventional adjusting screw (bolt) of the known technology. It is a three-dimensional view of the embedded expansion fastener of the present invention. It is a fastening display figure of the embedded expansion | swelling fastener of this invention, and a volt | bolt. It is a fastening mode display figure of an embedding expansion fastener and a bolt of the present invention. It is a fastening mode display figure of an embedding expansion fastener and a bolt of the present invention. It is a fastening mode display figure of an embedding expansion fastener and a bolt of the present invention. It is a fastening mode display figure of an embedding expansion fastener and a bolt of the present invention. It is a molding process display figure of the embedded expansion | swelling fastener of this invention. It is a molding process display figure of the embedded expansion | swelling fastener of this invention. It is a molding process display figure of the embedded expansion | swelling fastener of this invention. It is a molding process display figure of the embedded expansion | swelling fastener of this invention. It is a molding process display figure of the embedded expansion | swelling fastener of this invention. It is a molding process display figure of the embedded expansion | swelling fastener of this invention. It is a molding process display figure of the embedded expansion | swelling fastener of this invention. It is a molding process display figure of the embedded expansion | swelling fastener of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Fastener 12 Inner hole 14 Annular thread 16, 17, 18 Occlusal tooth 20 Locking area 22 Inclination area 24 Molding area 26 Groove 30 Reverse latch 40 Screw (bolt)
50 Workpiece 51 Hole 60 Fastening device 61 Projection ear 62 Retraction part

Claims (7)

Cut to the material dimensions required for the product, get two or more angle diagonal areas required for the product material, define the thread area,
Cut one or more grooves in the thread forming area,
In the diagonally angled area of the product, one or more back latches are pressed,
In the thread forming area, the required thread dimensions are pressed,
Press the angle of 1 degree or more in the oblique angle area of the product material,
In the thread area of the product material, U shape is pressed,
In the thread area of the product material, roll up a round shape,
A method of molding a type of embedded expansion fastener that includes the above construction procedure by cutting a material area, taking a product, and performing continuous press molding.   2. The method of molding an embedded expansion fastener according to claim 1, wherein the groove is formed in a thread forming area in a direction perpendicular to a 90-degree crosshair.   A kind of expansion fastener structure, forming a right cylindrical shape, providing an inner hole in the fastener, providing an annular thread in the inner hole, and further, the inner hole is drawn inward to provide an inclined surface, An implantable expansion fastener structure characterized in that one or more occlusal teeth are provided on the outside thereof.   The embedded expansion fastener structure according to claim 3, wherein the fastener is formed by bending a metal plate into a round shape.   4. The implantable expansion fastener structure according to claim 3, wherein a plurality of occlusal teeth having different heights and shapes are provided outside the fastener.   4. The implantable inflatable fastener structure of claim 3, further comprising one or more locking areas on the exterior of the fastener. 4. The embedded expansion fastener structure according to claim 3, wherein a projection ear is provided on the fastener, and a lead-in portion for fastening the projection ear is provided on the opposite side.

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