TWM602175U - Universal screw structure - Google Patents

Abstract

This invention relates to a universal screw structure, which includes a screw. A head portion is formed on the top of the screw, a rod portion is provided under said head, a tapered portion is provided under said rod portion, and a first thread is arranged on the outer surface of said rod portion. A tip portion is provided at the bottom of said tapered portion, said tapered portion is provided with a plurality of concave surfaces having a cutting function at the top of said tip portion, so that said tapered portion will form a plurality of concave space. The maximum diameter of said concave surface is smaller than the minimum diameter of said rod portion, each concave surface is separated from each other, and a second thread is arranged on the outer surface of a wall which is formed between the adjacent concave surfaces.

Description

Universal screw structure

This creation is a universal screw structure, especially a screw structure that can be used to lock a combination of plates of various materials.

According to the design of the construction project, when there are multiple plates that need to be locked, the user must choose the appropriate screws according to the material characteristics of the plates. For example, the author of this case previously applied for Taiwan Invention Patent No. I338083 "Screws for Composite Materials", which is a screw structure applied to the combination of non-metal plates and metal plates. The cap of the screw is set above the rod; the surface of the rod is provided with threads and a tip, which forms a cone on the tip; a cutting wing is provided between the rod or the rod and the cone, Cut the wing part and form a plurality of segments, the length of each segment is equal or unequal, among which the thickness of the tapered part or the lower end section is smaller than the cutting wing part of the upper end section; so, when the screw is used to lock composite materials , Especially the composite material formed by the combination of calcium silicate board and metal plate, its tip can be quickly locked into the calcium silicate board, but because the tapered part does not have a complete thread or no thread, it will touch the hard Material, and can’t be locked into the tapping smoothly. At this time, the cutting wing of the lower end section can be used to cut the surface of the calcium silicate board, and the cutting wing of the lower end section touches the surface of the calcium silicate board immediately. Twisting off allows the screw to be smoothly locked into the calcium silicate board and continue to move forward; when the screw is locked to the metal plate of the composite material, since the tip of the screw does not have a complete thread, it will not be The reverse thrust is generated, and the screw can be locked and passed through the metal plate more smoothly, and there is no complete thread or no thread in the section where the cutting wing part is originally provided. When the cutting wing part of the upper end section is performed on the surface of the metal plate It is twisted instantly after cutting, and the section will quickly pass through the metal plate, making the screw tap and lock the metal plate at a faster speed.

However, although the screws used in composite materials can be applied to the combination of calcium silicate plate and metal plate, or the combination of other plates and metal plates, it cannot be used in the combination of other non-metal plates. The reason is that the hardness of the non-metallic plate is much smaller than that of the metal plate. When the screw is used in a combination of non-metallic plates (such as any combination of wood, composite board, gypsum board, calcium silicate board), the cutting wing of the screw The part will continue to dig holes and will not break, so that the threads of the screw shaft cannot be tapped, causing the screw to continue idling and unable to lock the plate.

Furthermore, for example, the Taiwan Invention Patent No. I345614, "Drilling Screw" previously applied by the creator of this case, is a screw structure applied to a combination of metal plates; or a combination of non-metal plates and metal plates. The head of the screw is set above the threaded rod; the surface of the threaded rod is threaded; the drilling part is divided into three parts, the three parts include the cutting part close to the tip, which can be used to perform the workpiece Cutting drill holes; and a discharge part located above the cutting part, the discharge part is used to remove the cutting chips; and located above the discharge part, and close to the threaded rod part is provided with a guide part, the guide part has a guide The function of the screw is to allow the drilling screw and the workpiece to be vertically locked; and the drilling part is provided with a discharge guide groove; in this way, when the drilling screw of the present invention locks the workpiece, the aforementioned drilling part can be used The cutting part quickly cuts and drills the workpiece, and can be drilled into the workpiece, and then the aforementioned discharge part is used to contain the cutting chips, and because of the effect of the extrusion cutting chips generated by the continuous rotation of the screw, the cutting chips are moved upward through the aforementioned discharge groove Discharge; and when the screw is drilled to a certain depth, continue to guide the screw with the aforementioned guide part, so that the screw can be accurately locked into the workpiece.

However, although the drill screw can be applied to the combination of metal plates or other plates and metal plates, it cannot be used in the combination of other non-metal plates. The reason is that the function of the drill screw is mainly to use the drilled part of the screw to drill and remove chips. Due to the high hardness of the metal plate, the drilled metal plate can be easily locked by the tapping of the threaded rod; but this function will A large hole is formed in the non-metallic sheet. Due to the poor hardness of the non-metallic sheet, the non-metallic sheet after drilling will be difficult to tap, which will cause the screw to fail to lock the sheet. Conversely, if the outer diameter of the drilled portion of the drill screw is reduced, the non-metallic plate can be smoothly tapped and locked, but this will lead to the problem that the hole formed by the metal plate is too small to be tapped and locked. In addition, the manufacturing cost of drill screws is higher than that of ordinary screws, so all drill screws on the market are designed to be only suitable for the combination of metal plates, or other combinations of plates and metal plates.

In addition, for example, the Taiwan Model Patent No. 560583 "Tip Drilling Screw" previously applied by the creator of this case is a screw structure applied to the combination of non-metallic plates. The rod is provided with threads, and a cone-shaped part is provided at the end of the rod, and the cone-shaped part is provided with drilling threads and incomplete locking threads, wherein the drilling threads extend upward from the tip of the rod To the top of the cone, the end of the incomplete locking screw is not connected to the drilling screw, so when the screw starts to cut and drill the wood, the cutting chips generated by the wood will not be incomplete It is blocked by the locking screw, and can be discharged smoothly, the wood is not easy to break, and the locking torque can be reduced, and the locking force can be improved.

However, although the tip self-drilling screw can be applied to the combination of wood and other non-metal plates, it cannot be used in the combination of metal plates. The reason is that the hardness of the metal plate is too large. When the wood screw is used in a combination containing metal plates, the screw's locking thread will prevent the screw from tapping on the metal plate, and it is easy to produce idling phenomenon, causing the screw to fail to remove the metal. Plate lock.

Also, for example, Taiwan New Patent No. M320608 "Tapping Screw with Tail Slot" is a screw structure used in combination of non-metallic plates. A V-shaped tail-cutting groove extends axially from the end of the acting end to the other end of the active end of one end of the body with a threaded part, and the central axis of the body passes through the space of the cutting-tail groove. The planing surface of the groove extends to the thread portion to form a sharp, acute-angled cutting edge portion. The bottom groove surface is deep and the side surface of the active end portion, so that at least one thread is formed between the front edge of the bottom groove and the end of the active end portion The length of the gap makes the acting end form a sharp end, and the cutting tail groove has a larger chip holding space, so that the tapping screw can be screwed into the workpiece quickly, and the cutting tail groove provides a wider The accommodating space enables the chips to be cut out of the workpiece to be accommodated in the cutting tail groove, avoiding the chips generated by the cutting to accumulate on the bottom of the thread part and cause extrusion and frictional resistance.

However, although the cut-tail screw can be applied to the combination of wood and other non-metallic plates, it cannot be applied to the combination of metal plates. The reason is that the hardness of the metal plate is too large. Because the tail and shaft of the tail screw are cut and damaged, the structural strength of the screw's tail will be reduced; when the tail screw is used in a combination of metal plates, At the moment when the drill tail of the screw is in contact with the metal plate, as long as the angle is slightly deviated or the force is too large, the tail of the cutting screw cannot drill into the iron plate, or the tail break occurs, causing the screw to fail Lock the metal plates together.

For this reason, the creator of this case studied the shortcomings of the aforementioned various screw applications, accumulated years of experience in the research and development of screws and construction components related technologies, and created this case.

The purpose of this creation is to provide a screw structure that can be used to lock plate combinations of various materials. Through the innovative screw cone structure design, the screw cone can be used for tapping, cutting, chip removal and chip containment. Function, and will not damage the structural strength of the screw cone, so that the screw can smoothly drill through the metal plate and tap the metal plate. This creation uses the functions of cutting, chip removal and chip holding of the screw cone to prevent the plate from being squeezed and broken when the screw is locked to the non-metallic plate, reduce the locking torque, and make the head of the screw smoothly sink into the non-metallic plate. In the metal plate, the surface of the plate is kept smooth and beautiful, and the screw taper part will not have the problem of excessive digging, so that the non-metallic plate can be tapped and locked smoothly; and then the tapping function of the screw taper part is used, The screw can quickly drill, tap and securely lock the metal plate when locking the metal plate to match the locking application of various building materials on the market.

In order to achieve the foregoing purpose, the universal screw structure of this creation is to set a head above a screw; a rod is set below the head, and a cone is formed below the rod, outside the rod The surface is provided with a first thread portion; the bottom of the aforementioned cone portion is provided with a tip portion, and the cone portion is provided with a plurality of concave surfaces with cutting function above the aforementioned tip portion, and the cone portion has a plurality of concave portions Chip space; the maximum outer diameter of the inner concave surface is smaller than the minimum outer diameter of the rod, the inner concave surfaces are separated from each other, and the outer surface of the wall formed between the adjacent inner concave surfaces is provided with a first Two screw teeth department.

In the universal screw structure of this invention, the aforementioned concave surface is formed by stamping through a mold to increase the structural strength of the screw cone.

In the universal screw structure of this invention, the aforementioned concave surface can be arranged parallel to the center line of the rod, or can be inclined.

In the universal screw structure of this invention, when the aforementioned screw has two concave surfaces, it is more suitable for small screws, and the processing of the screw is more convenient, and the yield rate is higher. When the aforementioned screw has three concave surfaces, it is more suitable for medium-sized or large-sized screws. In this way, the functions of screw tapping, cutting, chip removal and chip removal can be improved.

In order to further understand this creation, the best implementation of the universal screw structure is shown in Figure 1 to Figure 11, which includes at least:

A screw 1 is provided with a head 10 on the upper side. The head 10 can be used with various screw locking tools, and the head 10 can be configured in various structures according to usage requirements. As shown in Figures 1, 2, and 7, when the aforementioned head 10 adopts a recessed head, when the screw 1 is locked with a non-metallic plate, the head of the screw can be directly cut into the non-metallic plate. Since the recessed head can cut and contain non-metallic plates, it can avoid the annular convexity of the non-metallic plate surface caused by lateral extrusion when the screw head sinks into the non-metallic plate. The problem of blemishes.

A rod portion 11 is provided below the head portion 10, and a taper portion 12 is formed below the rod portion 11. The outer surface of the rod portion 11 is provided with a first thread portion 110, the first thread portion 110 You can use various types of threads according to your needs, such as general threads, stepped threads, layered threads, or spaced threads.

A tip portion 120 is provided at the bottom of the taper portion 12, and a thread 121 corresponding to the first thread portion 110 is provided on the outer surface of the tip portion 120. The taper portion 12 is provided with a plurality of concave surfaces 122 having a cutting function above the tip portion 120, so that the taper portion 12 has a plurality of concave chip holding spaces. As shown in Figs. 2, 7, and 8, the maximum outer diameter of the inner concave surface 122 is smaller than the minimum outer diameter of the rod portion 11, and the inner concave surface 122 can be arranged parallel to the center line of the rod portion 11, or can be inclined. As long as it does not affect the structural strength of the cone 12, it is all right. The outer diameter of the inner concave surface 122 is greater than or equal to the maximum outer diameter of the tip 120, so as to prevent the structure of the tip 120 of the cone 12 from being damaged, and make the tip 120 of the cone 12 have the best structural strength ; Of course, as long as it does not affect the structural strength of the tip portion 120 of the cone 12, the outer diameter of the inner concave surface 122 can also be slightly smaller than the maximum outer diameter of the tip 120

The aforementioned concave surface 122 can be formed by stamping through a die, or can be formed by mechanical cutting; when the aforementioned concave surface 122 is formed by stamping using a die, the production speed of the screw can be accelerated, the production yield of the screw can be improved, and the taper 12 of the screw 1 can be increased. Its structural strength makes it easier to drill through sheet metal. As shown in Figures 2, 4, 6, 7, and 8, the inner concave surfaces 122 are separated from each other, and the outer surface of the wall 123 formed between the adjacent inner concave surfaces 122 is provided with a second threaded portion 124 The second thread portion 124 corresponds to the thread 121 of the aforementioned first thread portion 110 and the tip portion 120, so that the tapping effect of the screw 1 can be improved.

As shown in Figures 2, 4, 7, and 8, it is an embodiment with two inner concave surfaces 122. This embodiment is more suitable for small screws, and the screw processing is more convenient and the yield rate is higher; as shown in Figure 6 , Is an embodiment with three concave surfaces 122. This embodiment is more suitable for medium-sized or large-sized screws, so that the tapping, cutting, chip removal and chip holding functions of the screw 1 can be improved. Of course, no matter it is a small, medium or large screw, two or three concave surfaces 122 can be used; and this creation also requires the screw to have more than four concave surfaces 122, as long as it can meet the manufacturing cost and be processed smoothly, and It will not affect the structural strength of the cone 12, and nothing is necessary.

As shown in Figures 9 and 10, when the screw 1 of this creation is used to lock a non-metal plate A and a metal plate B, the screw 1 is first positioned on the non-metal plate A using the tip 120, and then uses the inner The concave surface 122 performs cutting, drilling and chip removal, and the chip holding space of the cone 12 can accommodate undischarged chips (as shown in Figure 10), preventing the non-metallic plate A from being crushed and reducing the locking torque; 1 When encountering metal plate B, the screw 1 can use the tip 120 for drilling and tapping. At this time, the metal plate B can be cut through the concave surface 122, and then the second thread 124 of the cone 12 is used to connect the tip 120 for tapping. Through the pulling force of the second threaded portion 124, the first threaded portion 110 of the screw 1 can be drilled down in succession with the pulling screw 1, and the screw 1 can generate the head 10 Sinking into the pulling force of the non-metallic sheet A, so that the non-metallic sheet A and the metal sheet B can be firmly locked and fixed, and the surface of the non-metallic sheet A can be kept flat and beautiful.

As shown in Figure 11, when the screw 1 of this creation is used to lock two non-metallic plates A1 and A2 (such as a combination of any two plates such as gypsum board, composite board, calcium silicate board, wood board, etc.), the screw 1 The tip portion 120 is used to first position the upper non-metallic plate A1, and then the concave surface 122 is used to cut and drill the two non-metallic plates A1, A2 and chip removal, and the chip holding space of the cone 12 can also accommodate The discharged chips can prevent the two non-metallic plates A1, A2 from being crushed and broken, and reduce the locking torque; in the process of cutting and drilling the screw 1, the maximum outer diameter of the inner concave surface 122 is smaller than the rod 11 The smallest outer diameter of the screw 1, so the screw 1 will not dig an excessively large hole, and the screw 1 is in the process of cutting and drilling, the thread 121, the second thread part 124 and the first thread part of the tip 120 of the screw 1 110 are continuously tapping, so that the screw 1 can generate enough pulling force to drive the screw 1 to sink, and the head 10 of the screw 1 can sink into the upper non-metallic plate A1, so that the two The non-metallic plates A1 and A2 are firmly locked and fixed, and the surface of the upper non-metallic plates A1 is kept smooth and beautiful.

Therefore, the universal screw structure of this creation uses an innovative taper structure design, so that the taper can have the functions of tapping, cutting, chip removal and chip holding, and will not damage the structure of the taper. The strength allows the screws to smoothly lock various combinations of plates. In this way, the user only needs to purchase a screw to handle the locking work of various plates, greatly reducing the complexity of various projects and the cost of raw materials, and has the best practicality and economic benefits, and is the composition of this project.

The foregoing embodiments or drawings do not limit the style or use of this creation. Any appropriate change or modification by a person with ordinary knowledge in the technical field should be regarded as not departing from the scope of the patent of this creation.

1: screw 10: head 11: Rod 110: The first thread part 12: Cone 120: Tip 121: Thread 122: inner concave surface 123: Wall 124: The second thread part A: Non-metallic sheet A1: Non-metallic sheet A2: Non-metallic sheet B: Sheet metal

Fig. 1 is a front view of the first embodiment with two inner concave surfaces of this creation. Figure 2 is a side view of the first embodiment of this creation with two inner concave surfaces. Fig. 3 is a cross-sectional view taken along line A-A of Fig. 2; Fig. 4 is a sectional view taken along line B-B of Fig. 2; Fig. 5 is a cross-sectional view taken along line C-C in Fig. 2; Fig. 6 is a cross-sectional view of the embodiment with three inner concave surfaces of this creation, corresponding to the position B-B in Fig. 2. Figure 7 is a side view of the second embodiment of this creation with two inner concave surfaces. Figure 8 is a side view of the third embodiment of this creation with two inner concave surfaces. Fig. 9 is an action diagram of the universal screw of this creation to lock a non-metal plate and a metal plate. Fig. 10 is a partial enlarged view of area F in Fig. 9; Figure 11 is an action diagram of the universal screw locking two non-metallic plates of this creation.

1: screw

10: head

11: Rod

110: The first thread part

12: Cone

120: Tip

121: Thread

122: inner concave surface

123: Wall

124: The second thread part

Claims (10)

A universal screw structure, including at least: A screw is provided with a head on the upper side; a rod is provided below the head, and a cone is formed under the rod, and a first threaded part is provided on the outer surface of the rod; The bottom of the cone is provided with a tip, and the cone is provided with a plurality of concave surfaces with cutting function above the tip, and the cone has a plurality of concave chip holding spaces; the largest outer of the concave surface The diameter is smaller than the minimum outer diameter of the aforementioned rod portion, the inner concave surfaces are separated from each other, and the outer surface of the wall formed between the adjacent inner concave surfaces is provided with a second thread portion. According to the universal screw structure described in item 1 of the scope of patent application, the outer diameter of the inner concave surface is greater than or equal to the maximum outer diameter of the tip. According to the universal screw structure described in item 1 of the scope of patent application, the aforementioned concave surface is formed by stamping through a mold to increase the structural strength of the screw cone. According to the universal screw structure described in any one of items 1 to 3 in the scope of the patent application, the aforementioned head is a recessed head, so that when the screw is locked on a non-metallic plate, the head of the screw It can be directly cut and sink into the non-metallic sheet without extruding the annular convex defect on the surface of the non-metallic sheet. According to the universal screw structure described in any one of items 1 to 3 in the scope of the patent application, the first thread portion may be a stepped thread portion, a layered thread portion or an interval thread portion. According to the universal screw structure according to any one of items 1 to 3 in the scope of the patent application, the plurality of inner concave surfaces are arranged parallel to the center line of the rod. According to the universal screw structure described in any one of items 1 to 3 in the scope of the patent application, the plurality of inner concave surfaces are arranged obliquely. According to the universal screw structure described in any one of items 1 to 3 in the scope of the patent application, the aforementioned plural concave surfaces are composed of two concave surfaces. According to the universal screw structure described in any one of items 1 to 3 in the scope of the patent application, the aforementioned plural concave surfaces are composed of three concave surfaces. According to the universal screw structure according to any one of items 1 to 3 in the scope of patent application, the outer surface of the tip portion is provided with threads.

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