TW201634822A - Floor screw - Google Patents

Abstract

The present invention provides a floor screw, which comprises a cap, a threaded rod connected to the cap, and a conic body connected to the threaded rod. The threaded rod includes a first rod section connected to the cap, a second rod section connected to the conic body, a first thread formed on the first rod section, a second thread extended from the conic body to the second rod section and arranged to be helically opposite to the first thread, and a third rod section disposed between the first rod section and the second rod section, which is characterized in that the third rod section includes a plurality of ridges radially extending to the threaded rod and a plurality of recessed troughs respectively corresponding to the ridges such that each ridge and each trough form a non-smooth surface on the third rod section.

Description

Floor screw

The invention relates to a floor screw, in particular to a floor screw which is specially used for connecting two materials to improve the bonding stability.

In the interior decoration work, it is often necessary to assemble and connect a plurality of workpieces to each other to form various functional and aesthetic components, because various decorative materials have different properties such as toughness, thermal shrinkage, heat insulation, drainage. And aesthetics, etc., so the practice often uses mixed or composite materials to cut off the length to achieve better results. For example, wooden furniture, floor or wall, the composite board or sandwich board is usually used as a skeleton to increase its strength, and the skin is attached or painted to modify the appearance. At this time, the skeleton and the wall will be locked by screws. When connecting, the screws will pass through two or two different materials. In this case, the hardness and density of the two materials are different. It is very likely that the screws will be cracked due to uneven stress. Problems such as screw deformation, so the industry has developed a double-tooth screw to cope with the need to connect two different materials.

For example, the new patent publication No. M383651 provides a screw including a head having a shaft extending on one side of the shaft, and a drill tail portion at a free end of the shaft, the rod body being provided adjacent to the shaft a first thread of the head, a second thread adjacent to the tail of the drill, and an empty tooth segment between the first thread and the second thread, and the tooth pitch of the first thread is smaller than the second thread The tooth pitch of the screw and the second screw of each turn are provided with a plurality of teeth with a chip removing effect, and the tail portion includes a tapping edge having an acute angle of two angles, the screw can lock the complex composite plate And prevent the stress generated during the attack and cause cracking and deformation of the composite panel.

However, the empty tooth segment of the screw provided by the prior art does not have a thread, so that the overall rigidity of the screw between the empty tooth portion and the plate is insufficient, and the joint may be unstable and shaken after the screw is tapped. In addition, since the periphery of the screw is a rounded shape, the operator is likely to be displaced due to the holding of the screw when the grip is unstable, resulting in inaccuracies in construction. Therefore, the prior art has been improved.

The object of the present invention is to solve the problem that the prior art has a problem that the screwing ability of the conventional screws is insufficient to cause the screwing to be unstable.

In order to achieve the above object, the present invention provides a floor screw comprising a screw head, a screw connected to the screw head, and a cone connected to the screw, the screw including a first rod segment connected to the screw head a second rod segment coupled to the cone, a first thread disposed on the first rod segment, one extending from the cone to the second rod segment and disposed in an inverse spiral with the first thread a second thread, and a third rod segment between the first rod segment and the second rod segment, wherein the third rod segment includes a plurality of peaks protruding radially toward the screw, and a plurality of Each of the peaks and each of the valleys form a non-smooth surface on the third rod segment with respect to each valley portion of the peak depression.

Further, each of the peaks is a pyramid, each of the valleys is a groove between each of the peaks, and each of the peaks is smaller than the first thread or the second thread The pitch.

Further, each of the peaks is arranged in a series around the third rod segment, and the adjacent two columns are arranged in a staggered manner.

Further, the third rod segment is a polygonal rod body, and each of the peak portions constitutes a top edge of the polygonal rod body, and each of the valley portions constitutes a plane of the polygonal rod body.

Further, the height of each of the peaks is between the second rod segment and the second thread.

Further, the rod diameter of the third rod segment is slightly larger than the rod diameter of the first rod segment.

Further, the floor screw further comprises a chip pocket recessed on the screw, the chip pocket comprising a starting end at the cone and a terminating end of the second rod segment.

Further, the first thread and the second thread are at an angle of 55° to 45° with the screw, and the angle is asymmetrically distributed near one side of the screw head and one side of the vertebral body.

Further, between the third rod segment and the first rod segment and the second rod portion, a pushing portion whose width is tapered toward the third rod portion is disposed.

Therefore, the present invention has the following beneficial effects over the prior art:

1. The floor screw of the present invention forms a non-smooth surface through the peaks and valleys on the third rod section, so that the first version of the screw can provide a channel for discharging the chips when the two screws are tapped into two different objects, and can increase the friction with the wall surface of the screw hole. The joint between the floor screw and the plate is made more stable. In addition, the third segment of the non-smooth surface can also increase the stability of the user to hold the floor screw, and can gain operational precision.

For a more detailed description of the technical features and operation modes of the present application, and with reference to the illustrations, please refer to the review. Furthermore, the present invention is not intended to limit the scope of the invention as claimed.

With respect to the contents of the present invention, referring to FIG. 1, the present invention provides a floor screw 100a including a screw head 10, a screw 20 coupled to the screw head 10, and a cone 30 coupled to the screw shaft 20. . The floor screw 100 of the invention is used for interlocking and connecting two floor boards, such as plastic floor and wooden floor, or the same material but having different hardness and elastic modulus.

More specifically, please refer to FIG. 2-1 and FIG. 2-2 together, the screw 20 includes a first rod segment 21 connected to the screw head 10, and a first connection to the cone 30 a two-bar segment 22, a first thread 40 disposed on the first rod segment 21, a second thread extending from the cone 30 to the second rod segment 22 and spirally disposed opposite the first thread 40 50, and a third rod segment 23a between the first rod segment 21 and the second rod segment 22. Therefore, the third rod segment 23a does not have a thread, and the floor screw 100 integrally forms a thread having different spiral directions at both ends, and the middle portion has no thread type. Further, the third rod segment 23a includes a plurality of peaks 231a protruding radially toward the screw 20, and a plurality of valley portions 232a recessed from each of the peak portions 231a, each of the peak portions 231a and each of the valleys The portion 232a constitutes a non-smooth surface on the third rod segment 23a. In the first embodiment of the present invention, the third rod segment 23a may be a polygonal rod body as shown in FIG. 1, FIG. 2-1 or FIG. 2-2, and each of the peak portions 231a constitutes the polygonal rod. The top edge of the body, and each of the valleys 232a constitutes a plane of the polygonal body. Thereby, the friction area between the third rod segment 23a and the chip is increased, and the stability of the floor screw 100a fixed between the plates after the tapping is improved, and the third rod segment 23a can also increase the user's grip. Frictional force to avoid problems such as slippage or unstable alignment during operation.

Preferably, the height of each of the peak portions 231a is between the second rod segment 22a and the second thread 50. The rod diameter of the third rod portion 23a is preferably slightly larger than the first rod portion 21a. Rod diameter. Thereby, during the tapping process, each of the pair of screw holes on the third rod segment 23a is pressed, and the aperture is slightly enlarged to make the tapping smooth, and the debris is moved to the first rod segment 21. Can be quickly discharged outside the screw hole. In addition, between the third rod segment 23a and the first rod portion 21 and the second rod portion 22, a pushing portion 233 having a width which is tapered toward the third rod portion 23a is provided, which can provide a buffer space. When the scraping material is discharged from the second rod section 22 to the third rod section 23a, the chip removing speed can be gradually changed to avoid the boundary of the second rod section 22 and the third rod section 23a. The density of the chips is too high and causes problems with cracked materials.

In the second embodiment of the present invention, as shown in Fig. 3, the third rod segment 23b of the floor screw 100b forms an elliptical cylinder. Referring to FIGS. 4-1 and 4-2, in the third embodiment of the present invention, the floor screw 100c, the third rod segment 23c is formed into a cylinder and is disposed on the outer circumference of the shaft. The shape of each of the peak portion 231c and the valley portion 232c. Each of the peaks 231c is a pyramid, each of the valleys 232c is a groove between each of the peaks 231c, and each of the peaks 231c is smaller than the first thread 40 or the first The pitch of the two threads 50, each of the peaks 231c is arranged in a series around the third rod segment 23c, and the adjacent two columns are staggered to maximize the friction and transmit through each of the valleys. The 232c provides a channel for chip removal, which reduces the problem of cracking of the material during the tapping process. According to the above different types of deformation, the friction area between the chip and the screw can be increased to increase the bonding stability.

In addition, referring to FIG. 5-1, in the third embodiment of the present invention, the floor screw 100c further includes a chip pocket 60 recessed on the screw 20, and the chip pocket 60 includes a The starting end 61 of the cone 30 and a terminating end 62 of the second rod section 22 are located. The chip flute 60 provides a passage through which the debris can be discharged from the screw hole during a tapping operation. Referring to FIG. 5-2, the angle between the first thread 40 and the second thread 50 is asymmetrically distributed on the side close to the screw head 10 and close to the side of the vertebral body, and the thread angle θ is preferably Between 55° and 45°, the floor screw 100 is more easily introduced into the object and provides an oblique supporting force after the lock to prevent the floor screw 100 from coming loose.

Hereinafter, the fourth embodiment of the present invention will be described. Referring to FIG. 6-1, first, a first object 200 and a second object 300 are engaged, and the first object 200 and the second object are respectively The object 300 is a plate of different materials, such as wood and plastic, and the user can pierce the cone 30 of the floor screw 100c into the top of the first object 200. Referring to Fig. 6-2, the screw head 10 is rotatably driven into the first object 200 by a tool such as a screwdriver (not shown). Referring to FIG. 6-3, after the first object 200 is penetrated and the second object 300 is tapped, since the first thread 40 and the second thread 50 are arranged opposite to each other, when the floor screw 100 is After penetrating the first object 200 and breaking into the second object 300, the second thread 50 cuts the inner surface of the first object 200 in the opposite direction, thereby breaking the debris cut by the first object 200. And it is exported to the channel generated when the lock is locked, to avoid the debris being entangled in the screw hole and hindering the tapping. Finally, as shown in FIG. 6-4, the screw head 10 abuts against the surface of the first object 200, and the third rod segment 23 is located at the interface of the first object 200 and the second object 300, the first thread 40 is engaged with the second object 300, and the second thread 50 is engaged with the first object 200 to complete the connection work between the first object 200 and the second object 300.

In summary, the floor screw of the present invention forms a non-smooth surface through the peaks and valleys on the third rod section, so that the first version of the screw can provide a passage for the waste material when it is tapped into two different objects, and can increase the wall surface of the screw hole. The frictional force causes the joint between the floor screw and the plate to be more stable. In addition, the third segment of the non-smooth surface can also increase the stability of the user to hold the floor screw, and can gain operational precision.

The above is a detailed description of the present invention, but the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent variation of the scope of the patent application of the present invention is Modifications are still within the scope of the patents of the present invention.

100a, 100b, 100c‧‧‧ floor screws
10‧‧‧ screw head
20‧‧‧ screw
21‧‧‧first pole
22‧‧‧Second section
23a, 23b, 23c‧‧‧ third segment
231a, 231c‧‧‧ Peak
232a, 232c‧‧‧ Valley
233‧‧‧Pushing Department
30‧‧‧ cone
40‧‧‧First thread
50‧‧‧second thread
60‧‧‧ chip flute
61‧‧‧starting end
62‧‧‧Terminal end θ‧‧‧ thread angle
200‧‧‧First object
300‧‧‧Second objects

Fig. 1 is a perspective view showing a first embodiment of the present invention. Figure 2-1 is a plan view showing the first embodiment of the present invention. Figure 2-2: A cross-sectional view of the position 2-1 in the A-A position. Figure 3 is a perspective view showing a second embodiment of the present invention. Figure 4-1 is a perspective view showing a third embodiment of the present invention. Figure 4-2: A partial enlarged view of Figure 4-1. Figure 5-1 is a schematic view of a chip flute according to a third embodiment of the present invention. Fig. 5-2 is a partially enlarged cross-sectional view of Fig. 5-1. Figures 6-1 to 6-4 are schematic views showing the operation of the third embodiment of the present invention.

100a‧‧‧floor screws

10‧‧‧ screw head

20‧‧‧ screw

21‧‧‧first pole

22‧‧‧Second section

23a‧‧‧third pole

231a‧‧‧ Peak

232a‧‧‧谷部

233‧‧‧Pushing Department

30‧‧‧ cone

40‧‧‧First thread

50‧‧‧second thread

60‧‧‧ chip flute

61‧‧‧starting end

62‧‧‧ Terminating end

Claims (9)

A floor screw comprising a screw head, a screw connected to the screw head, and a cone connected to the screw, the screw comprising a first rod segment connected to the screw head, and a cone connected to the cone a second rod segment, a first thread disposed on the first rod segment, a second thread extending from the cone to the second rod segment and disposed in a reverse spiral with the first thread, and an inter a third rod segment between the first rod segment and the second rod segment, wherein: the third rod segment includes a plurality of peaks protruding radially toward the screw, and a plurality of recesses corresponding to each of the peak portions In the valley portion, each of the peaks and each of the valley portions form a non-smooth surface on the third rod segment. The floor screw of claim 1, wherein each of the peaks is a pyramid, each of the valleys being a groove between each of the peaks, and a distance between each of the peaks It is smaller than the pitch of the first thread or the second thread. The floor screw of claim 2, wherein each of the peaks is arranged in a series around the third rod segment, and the adjacent two columns are staggered. The floor screw of claim 1, wherein the third rod segment is a polygonal rod body, each of the peak portions forming a top edge of the polygonal rod body, and each of the valley portions constitutes the multilateral The plane of the rod body. The floor screw of claim 1, wherein a height of each of the peaks is between the second rod segment and the second thread. The floor screw of claim 1, wherein the rod diameter of the third rod segment is slightly larger than the rod diameter of the first rod segment. The floor screw of claim 1, further comprising a chip pocket recessed on the screw, the chip pocket including a starting end at the cone, and a second rod section Termination end. The floor screw of claim 1, wherein the first thread and the second thread are at an angle of 55° to 45° with the screw, and the angle is near a side of the screw head and close to the vertebral body. One side is an asymmetric assignment. The floor screw of claim 1, wherein the third rod segment and the first rod segment and the second rod portion are provided with a pushing portion whose width is tapered toward the third rod portion.