TWI342926B - Screw - Google Patents

Description

1342926 IX. INSTRUCTIONS: [Technical Field] The present invention relates to a screw for a solid-state sheet on a substrate, more specifically relating to a fixed house.

Screws for roof sheetmg and waU cladduig. · The material of the roof cover sheet and the outer wall may be Polycarbonate, secret fiber reinforced plastic, other plastic materials and have a relatively high thermal expansion. Non-plastic material with coefficient. , '[Prior Art] 5 semi-rigid plastic sheets for building constructions (such as roofs and exterior walls), such as polycarbonate S-sheets or fiber-reinforced plastic sheets, which should be significantly higher than steel sheets. _ (four) number. When the sheet is fixed to the underlying substrate by a staple (such as a strip "battensj, wooden stringer" or metal), it is generally recommended that the screw must leave enough space for the piece to pass through the sheet. Expansion and contraction of the material to avoid possible damage to the sheet due to deformation and screw interference. Although the sheet material can be pre-drilled with a sufficient diameter of the deauna hole before the fixing screw is applied, the installation speed is further It is easy to apply a self-drilling screw with built-in function to provide a clearance hole of sufficient diameter to accommodate the thermal movement of the sheet. There have been many previous proposals that the integral cutter will be integrated. Incorporating the screw to cut out the clearance holes. These previous proposals do not fully meet the requirements of some products. For these products, they have a neat round hole that is easy to manufacture, cut the correct diameter, and easily allows rubber-like sealing. The sealing washer is assembled on the screw, and the whole _ 5 1342926 ring is located on one of the outer surfaces of the sheet around the screw head and the hole. According to the present invention, there is provided a semi-rigid sheet nail having a plurality of sheets integrally formed with a screw, wherein an arrangement between an accommodating sheet and a screw (in use) is included with respect to the screw Surrounding the spindle of the screw, the spacer portion has a cutting edge which is substantially along the direction of rotation of the screw to the screw. Advantageously, the screw is a drill screw. In a preferred embodiment, the wing is formed on the screw ί. Above the top end of the thread.) Each wing is large with its cutting edge gradually separating outward from the screw (formed towards the cymbal. Advantageously, the plane of the wing is thus inclined for the spindle of the screw Preferably, the cutting action is to cut into a flattened sheet. The tilt is quite good (between about 2.5 ° and 20 °. In a modified example, each wing is included to extend in the cutting edge to accommodate the hole) The sheet hole is cut when the cutting tool is configured to push the edge portion at the time of dicing. This structure is advantageous because the polycarbonate sheet is stronger than the fiber sheet. Among the characteristics

The screw cutter is fixed to the substrate, preferably in the aperture hole, so as to accommodate the heat movement, the wing portion of the cutting device, each wing extends longitudinally and forwards toward a portion of the scoop (in the shape of the screw-induced plane, and 7 the direction of the screw head) the opposite edge of the cutting edge produces a tendency not to make the spindle of the screw) at least one groove, the edge portion of the groove, and the edge portion leaves the polycarbonate for the screw head Special plastic sheet is slightly softer with 6 1342926

More flexible. [Embodiment] The screw shown in the drawing is a drill tail screw. The implemented screw drilling section 2, the appearance of which is described in the Applicant's patent: and is suitable for fixing wood or a relatively thin metal strip to fix a metal strip of about 1.5 mm thick or thicker. A grooved metal drilled portion of the pattern. The thread extends over the groove region of the portion 2, as described in the applicant's patent No. 719 72 5, however, in a conventional metal drilling portion, the thread begins within the interior of the adjacent groove portion. end. It may be invented and not limited to the use of one or other such forms of drilled portions for the selective use of other drilled portions suitable for the intended application, such as boring portions. The threads extend along the screw in a separate manner and terminate without a screw. An array of cutting wings 4 are formed on the screw and abutting the proximal end. The wing portion 4 is adapted to cut a large diameter clearance hole in the sheet. The wings 4 are angularly spaced around the main axis of the screw and are shown in two forms relative to the ends of the diameter. Other configurations are also possible. Each wing is generally flat such that its plane is inclined relative to the main shaft of the screw such that the end adjacent to the thread can be at the end of the screw drive in the direction of rotation (the end closer to the top). This is shown schematically in the fifth tilt preferably between about 2.5 ° and 20 °, and shows 719725 in this example. Design, for example, with the display and the implementation of the drilled portion to understand the original, and optional y1 type 7 drill head before the thread is straight and spaced at the wing, although the surface, and t outer end ( It guides its inside the picture. The tilt is better 7 1342926

It is about 8 °. The wing is also formed with a gradual increase in depth (approximately from its outer end to its maximum at its inner end). There is thus provided a wing having an outer edge that is outwardly inclined (in the direction of the screw head) and that is formed to provide a sharp cutting edge 6 (which extends forward in the direction of rotation of the screw drive). The cutting edge 6 is shown in enlarged cross-sectional view of the sixth and seventh figures. This form of cutting edge (the guiding surface facing the wing) provides a distinct, neat cut in the sheet as the screw rotates. It is worth noting that this is in contrast to some previous designs in which the so-called cutting wings actually wear or rub the holes in the roof cover sheets, which may result in rough and uneven clearance holes. The hole may not be the size that is recommended to accommodate the thermal movement range of the sheet.

The speed at which the wings 4 cut into the web depends on the speed at which the screws are driven into the underlying strip or string (which depends on the spacing of the threads). In order to ensure that the wing cuts through the sheet rather than punching or tearing a hole in the sheet, it is necessary to adjust the penetration speed of the screw, which must have a rather fine thread, typically threaded per inch ( Or its equivalent metric unit) has at least 10 turns of spiral. In fact, there will be a spiral between 10 and 20 turns per inch, and about 14 turns of spiral per inch provide screw mounting speed and A satisfactory balance between the controlled wing penetration speeds (when cutting). The wings are pressed out of the screw during the manufacture of the screw, and a thread having a standard size of 14 (or its equivalent metric unit) provides sufficient material in the screw to form the wings. When the thread has a smaller standard gauge, the portion of the screw higher than the thread will need to have an increased diameter to form the wing, and although this is feasible, it is actually not as good as it is seen in 1342926 because it Will make the manufacturing a little more complicated. The particular design of the steeply cut edges (described in the sixth and seventh circles) is also advantageous in terms of their manufacture, with the proper design of the pressing tool, the cutting edges can be produced without the need for subsequent removal. The chamfer part (flashing). A sealing gasket 10 made of a rubber-like material is attached to the unthreaded portion of the screw (between the cutting wing 4 and the top). Due to the divergent shape of the wings 4 itself, the washer 丨〇 can be easily mounted on the screw (by pushing the loop 10 over the wing 4). The eighth and ninth drawings respectively describe the structure of the screw with its sealing gasket at the time of installation and the installation. The angle of inclination of the wing itself relative to the main axis of the screw (as in the fourth figure), and the resulting cutting edge, allows the cutting action to be more than it should be (ie, if the wing direction is aligned with the screw spindle) A slight smoothness 6 also reduces the tendency of the wings to flatten the sheet during cutting. Flattening the flakes or more accurately flattening the wrinkles (c〇rrugati〇n) or ridges (where the screws extend) will result in a change in the overall web width' which can lead to calibration problems when fixing the flakes. The screw is not only useful when made of polycarbonate or fiber reinforced plastic sheet, but also with other plastic sheet and non-plastic sheet material (which is characterized by a high coefficient of thermal expansion and which requires a clearance hole to be manufactured) (for example, aluminum sheet) is also useful when it is made. The polycarbonate sheet is slightly softer and more elastic than the fiber reinforced plastic sheet. In some cases, the cutting edge 6 tends to push the peripheral edge portion of the cut hole in the sheet downward, which means that The holes may not be cut to the desired diameter and may not be a smooth circular cut. At one minus 9 1342926

In a modification of such a possible result, at least one groove 20 is formed in each of the cutting edge 6 and the adjacent portion of the wing (as shown in Figs. 10 and 11). The groove 20 has such a depth that the sheet around the hole is received. The peripheral portion (the downwardly deflected portion caused by the portion of the wing portion 4 below the groove so that the deflected edge portion can flex into the groove when it reaches the groove. The groove is upper or inner edge The orientation of the transverse spindle of the screw, whereby the peripheral edge of the sheet around the hole is inclined to be confined within the groove during cutting, and the nicking is made cleaner and rounder by the edge of the groove Cutting. The lower edge of the groove 2 0 b is equivalent to the spindle of the screw, so that the edge portion of the cutting piece is fed into the middle. Although the two wings 4 are each supplied with a single groove 20 (shown), However, each wing may have two or more dispersing grooves along its length. The embodiments have been described by way of example only, and modifications are within the scope of the invention. [Simplified illustration] The present invention will be described with reference to the examples of the drawings In the embodiment: the first figure is a view of a screw according to a preferred embodiment of the present invention; the second figure is an enlarged view showing a drilled portion of the screw; and the third figure shows a top end portion of the screw. The cutting wing is configured in a large picture, 4. The concave edge is Η, the groove is extended to partially tilt the concave view of the groove, and the perspective is placed 10 1342926. The fourth figure is a first figure without a sealing gasket. The side view of the screw is HQ · solid, the fifth figure is a general view showing the inclination of the cutting wing; the sixth figure is a partial enlarged sectional view of the DD line in the fourth figure; The cutting wing is a more detailed sectional view showing the cutting edge thereof; the eighth drawing is a drawing of a screw when the device enters the sheet; the ninth drawing is a screw similar to the eighth drawing but the display device is completed.

The tenth figure is a partial view showing a modified version of the cutter arrangement; and the eleventh diagram shows a detailed tenth diagram. [Main component symbol description]

2 Drilled part 4 Wing 6 Cutting edge 10 Gasket 20 Groove 20a Higher edge 20b Lower edge 11

Claims (1)

1342926 ' ψί ΗΙ: Jin Ge: II' No. 专利 Patent Case M Year I 丨 month Amendment 10, the scope of application for patent: 1 · A screw for fixing a semi-rigid sheet on a substrate, the screw has The cutter is integrally formed with a cutter configured to cut a clearance hole in the sheet relative to the screw to accommodate heat transfer between the sheet and the screw during use, the cutter configuration including wrapping a plurality of wings of the screw main shaft spaced apart, wherein the wing portion is inclined with respect to the screw main shaft such that the wing end closer to the tip end of the screw can follow the other end of the wing in the direction of rotation of the screw driving . 2. The screw of claim 1, wherein the wings are formed on a portion of the screw (the tip portion on the screw above the thread). 3. The screw of claim 1, wherein each of the wings has a cutting edge extending substantially longitudinally of the screw and forwardly toward a direction of drive rotation of the screw. 4. The screw of claim 3, wherein each of the wings is substantially planar and is formed with its cutting edge gradually separating outwardly from the screw (toward the direction of the screw head). 12 1342926 1 5. The screw of claim 1, wherein the tilt (relative to the spindle of the screw) is between about 2.5 ° and 20 °. 6. The screw of claim 5, wherein the inclination is about 8. . 7. The screw of claim 3, wherein the screw is a self-drilling screw. 8. The screw of claim 1, wherein each wing portion includes at least one groove extending through a cutting edge thereof to receive the cutting member configuration that has pushed the edge portion away from the cutting edge In the case of the snail head portion, the peripheral edge portion of the sheet material around the hole. 13