JPS63101509A - Crown machine screw for special lining of flooring board - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a head screw used for tightening steel members and/or wooden members, and more specifically, it is used for finishing floor work such as gymnasiums, and in particular for floor work. This item relates to a brain screw used in a special method of installing flooring boards as materials.

[Conventional technology]

Traditionally, floor construction for gymnasiums and other facilities involves constructing a prepared floor base on a concrete slab, fixing wooden or steel joists to the base assembly, placing plywood or other material as an underlayment on top of the joists, and placing flooring boards on top of that. It is common to stretch the material, sand it, and finish it with urethane resin paint. There are two methods for installing flooring boards as a finishing material in this flooring work: normal and special.

The special flooring board tension method is suitable for gymnasiums, martial arts clubs,
It is generally applied to large floors such as sports centers that have high requirements for strength, elasticity, smoothness, etc. In this special method, the flooring board is glued to the underlayment board stretched over the joists, and the joists, underlayment board, and flooring board are held together using hidden nails and head nails or screws. The outline of the process for the special flooring board installation method in which steel joists are fixed to a steel floor subassembly is as follows with reference to Figures 3 and 4.

■ Connect the Ohiki Steel 15 and the Joist Steel 10 with a steel plate screw (not shown)
Fix it firmly with and finish the base assembly. ■Place the underlay board (saved board) 1) on the joist 10 using flooring screws (not shown). ■Place the flooring boards 12 on top of the underlayment board 1) from the center of the room to both sides. ■Underlay board 1
), apply an adhesive 16 such as vinyl acetate emulsion, and drive hidden nails 17 into the underlayment board 1). ■Wooden dowel (
Make a hole for one-day use of buried wood) or synthetic resin dowels. ■
Drive a head nail or head screw 19 through the empty hole. ■Fill the hole with a wooden dowel or synthetic resin dowel 18 coated with adhesive.

■Cut off the unnecessary parts of the wooden dowels or synthetic resin dowels 18 that protrude above the flooring board 12 using a circular saw or the like to the extent that they can be sanded in the next step. ■ Sand the flooring board 12. 0 Paint the top of the flooring board 12 with polyurethane resin or the like.

■Draw coat lines, etc. ■Completed.

In the above process, the underlayment board 1) stretched over the joist 10 may be plywood, particle board, or sawn board, but it is preferable to select plywood, particle board, and sawn board in this order. Furthermore, in the case of the rope having a root size of M, the hidden nails 17 are driven between the joists, avoiding the position of the joists 10.

In this special method of bonding the flooring board to the underlayment board and fastening it with hidden nails and head nails or screws, holes for dowels about half the thickness of the flooring board are drilled, In a series of operations, such as driving in a dowel or screw, filling the hole with a wooden dowel or synthetic resin dowel, and cutting off the unnecessary part of the dowel that protrudes from the flooring board, the king of flooring boards, underlayment boards, and joists can be used as a dowel. Alternatively, the number of holes required for integration with the head screws will vary somewhat depending on the width and thickness of the flooring board and underlayment board to be cut, but it will be 40 to 50 holes per floor area IM. For example, this can be used in gymnasiums such as general elementary, junior high, and high schools (
Considering the floor area (500 to 600 rf), the number of abandoned holes is 20,000 to 30,000, so this construction method requires a great deal of skill and labor due to the large number of holes. .

However, in a gym where the floor is the lifeblood of a gymnasium, it must be resilient enough to withstand the intense action of various sports and sufficiently absorb strong shocks, and must be made so that athletes will not be at risk of injury due to falls or impacts. It must also have excellent safety, and in that sense, the above construction methods should not be used to cut corners in order to save time and effort. (drill a hole in the aluminum hole. (b) Drive a nail or screw into the hole. (C) Fill the hole with a wooden dowel or synthetic resin dowel. (d) Sand the filled dowel in the next process. It is long-awaited to shorten the four steps of la1 to (dl) by cutting as much as possible with a circular saw, etc., but the reality is that no such shortening method has yet been devised. Currently, floor construction continues to take a lot of time and effort through these four steps.

Therefore, it is an object of the present invention to provide a novel head screw that can shorten the above four steps in the special flooring board tensioning method.

[Means for solving problems]

The object is a head screw for tightening a steel member and/or a wooden member, the head of the head screw being removable for screwing the threaded portion of the head screw into the steel member and/or the wooden member. This is achieved by a screw for special tensioning of flooring boards, which is characterized by having a screw-in member attached thereto.

The brain top screw of the present invention is characterized in that a removable screwing member is attached to the head of the brain top screw, and it can be driven directly from the top of the flooring board without making a hole for a dowel to attach the flooring board, underlayment board, or joist. After they are fastened together and driven in, there is no need to use a circular saw to cut out the screw-in members that protrude above the flat surface of the flooring board, and it is only necessary to sand the floor surface to make it smooth.

There are various materials for the screwing member to be attached to the head of the head screw of the present invention, such as synthetic resin, wood, and steel, but synthetic resin is most preferable in consideration of the process of driving the head screw and sanding.

If it is a synthetic resin, it can be set to have sufficient strength so that the screw-in part will not be damaged or come off when driving, and the screw-in part can be easily removed by sanding, and it can be made in any color depending on the purpose. This is because it can be easily colored. Of course, depending on how the floor will be used after completion, wood or steel may be more desirable.
There is no particular limitation, and a preferred material may be used.

Further, the shape of the screwing member may be any shape, but considering that it will be screwed in with an electric screwdriver or the like, a hexagonal shape, which is commonly used, is most convenient (preferably).

Furthermore, if a raised part is provided near the tip of the head screw for making a hole in the wooden component, chips from the wooden component will not get stuck in the threaded part due to the hole, so the chips will prevent the head screw from becoming steel. It does not become difficult to screw into manufactured parts.

Note that the phrase "bakahole" used in the present invention means a hole having a diameter larger than the outer diameter of the thread of the threaded portion and smaller than the diameter of the head.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the head screw for special tensioning of flooring boards of the present invention will be explained based on examples.

Figure 1 +al, mountain) shows one embodiment. As mentioned above, the head screw 1 of the present invention is characterized by a cylindrical head 2, that is, the cylindrical head 2 has a screw 1 that can be screwed into a steel member or a wooden member using an electric screwdriver or the like. A screwing member 3 is provided. In this embodiment, the screwing member 3 has a commonly used hexagonal shape, and the head 2 is made of synthetic resin. The threaded portion of the head screw 1 has a head 2 having a screwing member 3.
A plurality of protrusions 4 are formed to prevent the screw from coming off the threaded portion when screwed in, and the head 2 is provided so as to cover the protrusions 4. The shape, number, and pitch of the threads 5 of the threaded portion may be determined depending on the use of the head screw l.
A groove 6 is formed at the tip for easy screwing into a steel member, and a raised portion 7 is formed above 416. This raised portion 7 is a hole in the wooden member that has a diameter larger than the outer diameter of the screw thread 5 and smaller than the diameter of the head 2 when the wooden member and steel member are tightened together using the flooring board special tension method. When the screw is opened, wood chips get stuck in the groove 6 of the tip and the valley of the screw thread 5, and the tip for cutting the steel member does not do its job, and the head screw 1 does not cut properly into the steel member.
This is provided to solve the problem of not being screwed in. When the raised portion 7 reaches the steel member after making a hollow hole in the wooden member, it is immediately separated from the threaded portion by the steel member. Incidentally, when the head screw 1 is used for a method other than the special flooring board tensioning method, for example, when screwed into only a steel member or a wooden member, the raised portion 7 is not necessary. Furthermore, the threaded part is provided with a blade 8 for penetrating the steel or wooden part up to the head 2.

The head screw 1 having such a structure is used for floor construction of gymnasiums and the like as described above, and is particularly suitable for a special tension construction method in which steel joists are used and flooring boards are stretched as a finishing material. Below, the steps of the special flooring board tensioning method using this brain top screw 1 will be briefly described with reference to FIG. 2.

As the floor subassembly, a steel subfloor subassembly is used as in Fig. 3, and the steel joists 1o are fixed to this steel subfloor subassembly, and the three steel joists 10, underlayment board 1), and flooring board 12 are attached. It shall be tightened using a head screw 1 to hold the parts together. Since the steps up to the step of driving the hidden nails 17 into the underlayment board 1) are the same as the conventional steps, the explanation up to that step will be omitted here. Conventionally, the next step is to drill a hole for the dowel, but with the head screw 1 of the present invention, the head screw 1 is placed at the position where the hole would originally be drilled, without drilling the hole, and the driver Tighten the flooring board 12, siding board 1), and joist 10 together using methods such as the following. At this time, a hollow hole with a diameter larger than the outer diameter of the screw thread 5 (and smaller than the diameter of the head 2) is made in the wooden flooring board 12 and underlayment board 1 by the ridge E part 7. This hollow hole prevents wood chips from getting stuck in the groove 6 at the tip or in the valley of the thread 5, which would interfere with thread cutting of the steel joist 10, and furthermore, the raised portion 7
is separated when it reaches the steel joist 10, and the head screw l is finally screwed onto the flooring board 12 until the screwing member 3 protrudes (see FIG. 2).

After that, sanding is performed, and at the same time, the screwing member 3 protruding from the flooring board 12 is removed, and the next resin coating is applied.

In this sanding, since the screwing member 3 is made of synthetic resin, it can be easily cut off by sanding.

In this way, with the brain top screw 1, there is no need to make holes for dowels in the flooring board 12, there is no need to fill the holes with wooden dowels or synthetic resin dowels, and the filled wooden dowels or synthetic resin dowels can be sanded. It has the advantage in terms of the process that it is not necessary to cut it out with a circular saw to a certain extent. That is, the steps from (al to +dl), that is, (
Make an al hole.

(Mountain) Drive the brain top nail or brain top screw through the hole.

(cl. Fill the holes with wooden dowels or synthetic resin dowels.

Use a circular saw to cut out the dowel filled with fdl to the extent that it can be sanded in the next step. These four steps have been shortened to just one step of screwing in the head screw, which is one step from the conventional process.
It only takes 74 to 1/3 of the process, and can significantly reduce construction work and time. In addition, since it is a truly labor-intensive task of simply screwing in the head screw with an electric screwdriver, no special skills are required.Furthermore, since the head of the head screw is made of synthetic resin, it can be used as a dowel in the hole using the conventional process. The brain top screw of the present invention can prevent the wooden dowels from coming off due to shrinkage of the flooring board that occurs when dowels are stuffed. This solves all points at once.

〔Effect of the invention〕

As explained above, the screws for special tensioning of flooring boards of the present invention are ideal for tightening steel members and wooden members, and are particularly suitable for use when performing floor construction in gymnasiums etc. using the special tensioning method for flooring boards. , it is possible to significantly shorten the intermediate steps, and floor construction can be carried out more quickly with less labor (furthermore, without requiring any special skills), making it extremely useful in practice.

[Brief explanation of the drawing]

Fig. 1 (al, mountain) shows an embodiment of the head screw for special tensioning of flooring boards of the present invention, (al is a partially cutaway side view thereof, (b) is a plan view, and Fig. 2 is the same as that shown in Fig. 1. Figure 3 shows the case where the brain top screw shown in Figure 3 is used in the special flooring board tensioning method, and is a schematic cross-sectional view showing the state when the flooring board, underlayment board, and steel joists are tightened together. It is a schematic sectional view showing a conventional example used in the flooring board special tensioning method, showing the state when the flooring board, underlayment board, and steel joists are tightened together, and a partially omitted enlarged sectional view of the fourth steel joist. 1: Head screw 2: Head 3: Screw-in member 4: Protrusion 5: Screw thread 6: Groove 7: Ridge 8: Blade 10: A joist 1): Underlay board 12: Flooring board

Claims (3)

[Claims] (1) A head screw for tightening a steel member and/or a wooden member, the head of the head screw being removable for screwing the threaded portion of the head screw into the steel member and/or the wooden member. A screw for special tensioning of flooring boards, which is characterized by having a screw-in member attached. (2) The head screw for special tensioning of a flooring board according to claim (1), wherein the removable screwing member is made of synthetic resin. (3) Claim (1) or (2), characterized in that a raised portion for making a hole in a wooden member is provided on a portion near the tip of the head screw. Brain top screws for special upholstery of flooring boards.