Adhesive applicator and machine screw set using the same

Abstract

To reduce a worker's burden to fasten a machine screw to a loosened screw hole securely.SOLUTION: An adhesive applicator 50 for applying an adhesive 30 to a thread part N of a machine screw 10 has an applicator main unit 20 provided with one or more through holes H for housing the adhesive 30 therein and inserting the thread part N of the machine screw 10 thereinto to cause the adhesive 30 to adhere to the thread part N. The through hole H is provided so as to prevent a head part T of the machine screw 10 from protruding from the applicator main unit 20 and entering the inside of the through hole H. Further, the through hole H has: a thread part arrangement part Ha for arranging the thread part N of the machine screw 10 at the one opening end side; and an adhesive leaking part Hb for leaking the extra adhesive 30 at the other opening end side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an adhesive applicator and a screw set using the same, and more particularly to an adhesive applicator for applying adhesive to screws and a screw set using the same. [Background technology]

[0002] At construction sites, when fastening wooden frames and other structures with screws, it is common for workers to fail to install the screws, also known as wood screws, and have to try again several times. When this happens, the screw hole formed in the wooden object to be attached becomes loose relative to the screw's threads, so workers apply adhesive to the screw's threads and then screw the screw into the screw hole to install it.

[0003] For example, Patent Document 1 discloses a bolt as a self-locking fastener, in which the threads are coated with an adhesive made of a polymer binder in which capsules containing a curable resin are dispersed. Patent Document 1 also describes that with this bolt, the capsules are broken by shear force, and the curable resin released from the capsules mixes with the curing agent contained in the polymer binder, causing the curable resin to harden. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 54-1737 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the adhesive disclosed in Patent Document 1 is applied to the threads of a screw and the screw is attached to a loosened screw hole in the object to be attached, the capsules are difficult to break due to insufficient shear force, and there is a risk that the adhesive will not harden sufficiently. Also, manually applying adhesive to the threads of a screw at the construction site is a burden for the worker and can lead to uneven application or forgetting to apply the adhesive, so there is room for improvement from the worker's perspective as well.

[0006] The present invention has been made in consideration of the above points, and its object is to reduce the burden on the worker and to reliably fasten a screw into a loosened screw hole. [Means for solving the problem]

[0007] In order to achieve the above object, the adhesive applicator of the present invention is an adhesive applicator for applying adhesive to the threaded portion of a screw, and has an applicator body that stores the adhesive inside and has one or more through holes formed therein for inserting the threaded portion of the screw and adhering the adhesive to the threaded portion, and the through holes are arranged so that the head of the screw does not protrude from the applicator body and enter the through hole, and is characterized in that it has a thread portion placement section on one open end side for placing the threaded portion of the screw, and an adhesive leakage section on the other open end side for leaking out any excess adhesive.

[0008] According to the above configuration, adhesive can be applied to the screw threads by storing adhesive inside one or more through holes formed in the applicator body and inserting the screw threads into them. Furthermore, the through holes formed in the applicator body are designed so that the screw heads do not protrude from the applicator body and enter the through holes, thereby preventing adhesive from adhering to the screw heads, which can interfere with screw fastening. This eliminates the need for an operator to apply adhesive to the screw threads each time. Therefore, by simply attaching a screw with adhesive applied to its threads to a loosened screw hole in an object, the operator's burden can be reduced and the screw can be securely fastened to the loosened screw hole. Furthermore, the through holes formed in the applicator body have a thread placement portion at one open end for accommodating the screw threads and an adhesive leakage portion at the other open end for allowing excess adhesive to leak out. This prevents adhesive from overflowing from one open end of the through hole, further preventing adhesive from adhering to the screw heads, which can interfere with screw fastening.

[0009] The through hole may have a circular cross-sectional shape, the diameter of the screw portion arranging portion may be smaller than the diameter of the head of the screw and larger than the diameter of the screw portion of the screw, and the diameter of the adhesive leakage portion may be smaller than the diameter of the screw portion arranging portion.

[0010] According to the above configuration, the diameter of the threaded portion of the through hole is smaller than the diameter of the screw head and larger than the diameter of the screw thread, so that when the screw thread is positioned inside the through hole, the screw head does not protrude from the applicator body and does not enter the through hole specifically. Also, because the diameter of the adhesive leakage portion is smaller than the diameter of the threaded portion, the amount of adhesive overflowing at the other open end of the through hole can be reduced.

[0011] One open end of the through hole may be provided so as to be closed by the head of the screw or a cover member that presses the head of the screw.

[0012] According to the above configuration, one opening end of the through hole formed in the applicator body is configured to be blocked by the head of the screw or a cover member that presses down on the head of the screw, so that the adhesive can be sealed on the side of one opening end of the through hole.

[0013] The other open end of the through hole may be provided so as to be closed by a tape member or a cover member.

[0014] According to the above configuration, the other open end of the through hole formed in the applicator body is closed with the tape member or cover member, so that the adhesive can be sealed not only at one open end of the through hole but also at the other open end of the through hole. This makes it possible to carry the adhesive applicator to the construction site with the threaded portion of the screw and adhesive housed inside the through hole formed in the applicator body, and also prevents the adhesive from hardening, allowing the screw to be used immediately when needed.

[0015] In addition, the screw set according to the present invention may include the adhesive applicator described above, a screw having a threaded portion inserted into the through hole, and adhesive contained inside the through hole.

[0016] According to the above configuration, the threaded portion of the screw is inserted into a through hole formed in the applicator body of the adhesive applicator, and adhesive is contained therein.Therefore, by removing the screw from the screw set and attaching the screw with adhesive applied to the threaded portion to the loosened screw hole in the object to be attached, the burden on the worker can be reduced and the screw can be securely fastened into the loosened screw hole. [Effects of the Invention]

[0017] According to the present invention, one or more through holes are formed in the applicator body to accommodate adhesive inside and to insert the threaded portion of a screw so that the adhesive can be attached to the threaded portion, and the through holes are provided to prevent the head of the screw from protruding from the applicator body and entering the interior, thereby reducing the burden on the worker and enabling the screw to be securely fastened into a loose screw hole. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a cross-sectional view of an adhesive applicator according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing a part of a process for manufacturing a screw set using the adhesive applicator according to the first embodiment of the present invention. [Figure 3] FIG. 3 is a perspective view showing a part of the process of manufacturing a screw set following FIG. 2. [Figure 4] FIG. 4 is a perspective view showing a part of the process of manufacturing a screw set following FIG. 3. [Figure 5] FIG. 5 is a perspective view showing a part of the process of manufacturing a screw set following FIG. 4. [Figure 6] FIG. 6 is a perspective view showing a part of the process of manufacturing a screw set following FIG. 5. [Figure 7] FIG. 2 is a perspective view of a modified example of the adhesive applicator according to the first embodiment of the present invention. [Figure 8] FIG. 10 is a perspective view of an adhesive applicator according to a second embodiment of the present invention. [Figure 9] 9 is a cross-sectional view of the adhesive applicator taken along line IX-IX in FIG. 8. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the following embodiments.

[0020] First Embodiment Figures 1 to 7 show a first embodiment of an adhesive applicator and a screw set using the same according to the present invention. Here, Figure 1 is a cross-sectional view of an adhesive applicator 50 of this embodiment. Also, Figures 2, 3, 4, 5 and 6 are perspective views successively showing part of the process of manufacturing a screw set S using the adhesive applicator 50. Also, Figure 7 is a perspective view of an adhesive applicator 50a, which is an example of a modified version of the adhesive applicator 50.

[0021] As shown in FIGS. 1 and 6, the adhesive applicator 50 includes a rectangular parallelepiped applicator body 20 and a tape member 21a attached to the bottom surface of the applicator body 20, and is configured to apply adhesive 30 to the threaded portion N of a screw 10. The screw 10 is also called a wood screw and is made of a metal material such as iron or stainless steel. As shown in FIG. 1, the screw 10 includes a head T having a generally truncated cone shape with a cross-shaped groove formed on the upper surface, and a generally cylindrical threaded portion N having a pointed tip and a spiral groove formed on the circumferential surface, which is continuous with the head T. The adhesive 30 is made of a one-component adhesive, such as an emulsion-type (drying type) adhesive such as a polyvinyl acetate-based or acrylic-based adhesive, or a polyurethane-based reactive (moisture-curing) adhesive.

[0022] The applicator body 20 is made of, for example, an organic resin material such as polyethylene or a metal material such as aluminum, and has low or no air permeability, thereby preventing the adhesive 30 from drying out or hardening to the extent that it can be stored under normal conditions after opening. The applicator body 20 is also provided with a plurality of through-holes H, each having a circular cross-sectional shape, as shown in FIGS. 1 and 6. While the present embodiment illustrates an adhesive applicator 50 having an applicator body 20 formed in a rectangular parallelepiped shape, the adhesive applicator 50a may also be provided with an applicator body 20a having a corrugated curved side, as shown in FIG. 7. Here, as shown in FIG. 7, the adhesive applicator 50a includes an applicator body 20a (corresponding to the applicator body 20) formed with a plurality of cylindrical bodies connected horizontally in the above-described shape, and a tape member 21b (corresponding to the tape member 21a) provided on the bottom surface of the applicator body 20a. The adhesive 30 is configured to be applied to the threaded portion N of the screw 10 through the through-hole H formed in each cylindrical body. As shown in FIG. 7, the adhesive applicator 50a can be separated along the groove C formed at the connecting portion of the cylindrical body as needed (see the two-dot chain line in the figure), so that the required number of pieces can be separated and brought to the work site, making the work easier.

[0023] As shown in FIG. 1, the through hole H is configured to accommodate adhesive 30 therein and to receive the threaded portion N of the screw 10 so that the adhesive 30 adheres to the threaded portion N. Furthermore, as shown in FIG. 1, the through hole H has a threaded portion placement portion Ha for placing the threaded portion N of the screw 10 therein and an adhesive leakage portion Hb for allowing any remaining adhesive 30 to leak out. Here, as shown in FIG. 1, the diameter of the through hole H is smaller than the diameter Da of the head T of the screw 10 but larger than the diameter of the threaded portion N of the screw 10, so that the head T of the screw 10 does not protrude from the applicator body 20 and enter its interior. Furthermore, as shown in FIG. 1, the diameter Dc of the adhesive leakage portion Hb is smaller than the diameter Db of the threaded portion placement portion Ha. 1, the edge of one opening end of through-hole H (upper in the drawing) is formed into a shape that fits the side surface (circumferential surface) of the truncated cone of head T of screw 10, and is arranged to be closed by head T of screw 10. The other opening end of through-hole H (lower in the drawing) is arranged to be closed by tape member 21a affixed to the bottom surface of applicator body 20, as shown in FIGS.

[0024] The tape member 21a is made of, for example, a polyvinyl chloride adhesive tape. Although the present embodiment illustrates a configuration in which the other open end of the through-hole H is blocked with the tape member 21a, the other open end of the through-hole H may be blocked by welding the applicator body 20, or by hardening the bottom portion of the adhesive 30 contained in the adhesive leaking portion Hb, for example.

[0025] Here, the screw set S using the adhesive applicator 50 includes the adhesive applicator 50 having the above-described configuration, screws 10 having threaded portions N inserted into each through hole H, and adhesive 30 contained inside each through hole H, as shown in Figure 1.

[0026] Next, a method for manufacturing the screw set S of this embodiment will be described.

[0027] First, as shown in FIG. 2, adhesive 30 is filled into each of the through holes H formed in applicator body 20.

[0028] Next, as shown in Figure 3, the threaded portion N of the screw 10 is inserted into each through hole H, and as shown in Figure 4, the remaining adhesive 30 is allowed to leak out from the other open end side (lower in the figure) of each through hole H.

[0029] Finally, as shown in FIG. 5, the long tape member 21 is attached to the bottom surface of the applicator body 20, and then the long tape member 21 is cut out to form the tape member 21a as shown in FIG.

[0030] In this manner, the screw set S of this embodiment can be manufactured.

[0031] In this embodiment, the applicator body 20 is exemplified as being made of an organic resin material or a metal material (with low or no breathability), but if the period between the manufacture of the screw set S and the use of the screw 10 is relatively short, the applicator body 20 may be made of a wood material (with breathability) or the like.

[0032] As described above, with the adhesive applicator 50 of this embodiment and the screw set S using the same, adhesive 30 can be placed inside a plurality of through holes H formed in the applicator body 20 and the threaded portion N of a screw 10 can be inserted thereinto, thereby applying adhesive 30 to the threaded portion N of the screw 10. Moreover, the diameter of each through hole H is smaller than the diameter Da of the head T of the screw 10 but larger than the diameter of the threaded portion N of the screw 10. This prevents the head T of the screw 10 from protruding from the applicator body 20 and entering the through hole H, thereby preventing adhesive from adhering to the head T of the screw 10, which can interfere with screw fastening. This eliminates the need for an operator to apply adhesive 30 to the threaded portion N of the screw 10 each time. Therefore, by removing the screw 10 from the screw set S and applying adhesive 30 to the threaded portion N, the screw 10 can be installed into a loosened screw hole in an object, thereby reducing the burden on the operator and ensuring reliable screw fastening in a loosened screw hole.

[0033] Furthermore, with the adhesive applicator 50 of this embodiment and the screw set S using it, each through hole H has a threaded portion arrangement portion Ha at one open end where the threaded portion N of the screw 10 is arranged, and an adhesive leakage portion Hb at the other open end for allowing any remaining adhesive 30 to leak out, so it is possible to prevent the adhesive 30 from overflowing at one open end of each through hole H, and further prevent the adhesive from adhering to the head T of the screw 10, which could interfere with screw fastening, etc. Furthermore, because the diameter of the adhesive leakage portion Hb is smaller than the diameter of the threaded portion arrangement portion Ha, it is possible to reduce the amount of adhesive 30 that overflows at the other open end of each through hole H.

[0034] Furthermore, with the adhesive applicator 50 of this embodiment and the screw set S using it, one open end of each through hole H is arranged to be blocked by the head T of the screw 10, and the other open end of each through hole H is arranged to be blocked by the tape member 21a, so that the adhesive 30 can be sealed at both open end sides of each through hole H. This makes it possible to carry the adhesive applicator 50 to a construction site with the threaded portion N of the screw 10 and the adhesive 30 housed inside the through hole H formed in the applicator body 20, and also makes it possible to suppress hardening of the adhesive 30, so that the screw 10 can be used immediately when needed.

[0035] Second Embodiment Figures 8 and 9 show a second embodiment of an adhesive applicator and a screw set using the same according to the present invention. Here, Figure 8 is a perspective view of adhesive applicator 50b of this embodiment. Also, Figure 9 is a cross-sectional view of adhesive applicator 50b taken along line IX-IX in Figure 8. In the following embodiment, the same parts as those in Figures 1 to 7 are designated by the same reference numerals, and detailed description thereof will be omitted.

[0036] In the first embodiment described above, an adhesive applicator 50 (50a) having multiple through holes H formed in the applicator body 20 (20a) was exemplified, whereas in this embodiment, an adhesive applicator 50b having one through hole H formed in the applicator body 20b is exemplified.

[0037] 8 and 9, adhesive applicator 50b comprises a plurality of applicator bodies 20b each mounted on a cylinder, tape member 21c provided on the bottom surface of each applicator body 20b, cover member 22 provided on the top of each applicator body 20b, and connecting band 25 provided to connect the plurality of applicator bodies 20b, and is configured to apply adhesive 30 to the threaded portion N of screw 10. Furthermore, adhesive applicator 50b can be brought to a work site in a more compact state than that of the first embodiment, and is configured so that it can be separated into individual applicator bodies 20b by cutting the connecting portion of connecting band 25 as needed, so that the required number can be separated even when working at height, allowing for safer and more reliable work.

[0038] The applicator body 20b is made of, for example, an organic resin material such as polyethylene or a metal material such as aluminum. The applicator body 20b is provided with a through hole H having a circular cross section, as shown in FIG. 9 . As in the first embodiment, the through hole H is configured to accommodate adhesive 30 therein and to receive the threaded portion N of the screw 10 so that the adhesive 30 adheres to the threaded portion N. As in the first embodiment, the through hole H also has a threaded portion placement portion Ha for placing the threaded portion N of the screw 10 and an adhesive leakage portion Hb for allowing excess adhesive 30 to leak to the outside, as shown in FIG. 9 . The edge of one opening end (upper in the drawing) of the through hole H is shaped to fit the side surface (circumferential surface) of the truncated cone of the head T of the screw 10, as shown in FIG. 9 , and is configured to be closed by the head T of the screw 10 and a cover member 22 that holds the head T of the screw 10. 8 and 9, the other open end of through hole H (lower in the figure) is configured to be closed by tape member 21c attached to the bottom surface of applicator body 20b. Note that, although the present embodiment illustrates a configuration in which one open end of through hole H is closed by head T of screw 10 and cover member 22 that presses down head T of screw 10, one open end of through hole H may be closed only by cover member 22 that presses down head T of screw 10.

[0039] Tape member 21c is made of, for example, an adhesive tape made of polyvinyl chloride. Although the present embodiment illustrates a configuration in which the other open end of through-hole H is blocked with tape member 21c, the other open end of through-hole H may be blocked by welding applicator body 20b, by hardening the bottom portion of adhesive 30 contained in adhesive leaking portion Hb, or by a cover member having a structure similar to cover member 22.

[0040] Cover member 22 is made of, for example, an organic resin material such as polyethylene, or a metal material such as aluminum. As shown in Fig. 9, cover member 22 is cylindrical with an upper surface so as to cover the top of columnar applicator body 20b. A convex portion is provided on the inner peripheral surface of cover member 22, and is adapted to fit into a concave portion provided on the outer peripheral surface of applicator body 20b.

[0041] The connecting band 25 is made of, for example, an adhesive tape made of polyvinyl chloride.

[0042] Here, the screw set S using the adhesive applicator 50b comprises the adhesive applicator 50b having the above-described configuration, a screw 10 having a threaded portion N inserted into each through hole H, and adhesive 30 contained inside each through hole H, as shown in Figures 8 and 9.

[0043] The screw set S of this embodiment can be manufactured, as in the first embodiment, by filling the through-hole H of each applicator body 20b with adhesive 30, then inserting the threaded portion N of a screw 10 into each through-hole H to allow any excess adhesive 30 to leak out, and then attaching a tape member 21c to the bottom surface of each applicator body 20, covering the top of each applicator body 20b with a cover member 22, and connecting the multiple applicator bodies 20b with connecting bands 25.

[0044] In this embodiment, the applicator body 20b and cover member 22 are exemplified as being made of an organic resin material or a metal material (which has low breathability or is not breathable), but if the period between the manufacture of the screw set S and the use of the screw 10 is relatively short, the applicator body 20b and cover member 22 may be made of a (breathable) wood material or the like.

[0045] As described above, with the adhesive applicator 50b of this embodiment and the screw set S using it, adhesive 30 can be placed inside the through-hole H formed in each applicator body 20b and the threaded portion N of the screw 10 can be inserted thereinto, thereby applying adhesive 30 to the threaded portion N of the screw 10. Moreover, the diameter of each through-hole H is smaller than the diameter Da of the head T of the screw 10 but larger than the diameter of the threaded portion N of the screw 10. This prevents the head T of the screw 10 from protruding from the applicator body 20 and entering the through-hole H, thereby preventing adhesive from adhering to the head T of the screw 10, which could interfere with screw fastening. This eliminates the need for an operator to apply adhesive 30 to the threaded portion N of the screw 10 each time. Therefore, by removing the screw 10 from the screw set S and applying adhesive 30 to the threaded portion N, the screw 10 can be installed into a loosened screw hole in an object, thereby reducing the burden on the operator and ensuring reliable screw fastening in a loosened screw hole.

[0046] Furthermore, with the adhesive applicator 50b of this embodiment and the screw set S using it, each through hole H has a threaded portion arrangement portion Ha at one open end where the threaded portion N of the screw 10 is arranged, and an adhesive leakage portion Hb at the other open end for allowing any remaining adhesive 30 to leak out, so it is possible to prevent the adhesive 30 from overflowing at one open end of each through hole H, and further prevent the adhesive from adhering to the head T of the screw 10, which could interfere with screw fastening, etc. Furthermore, because the diameter of the adhesive leakage portion Hb is smaller than the diameter of the threaded portion arrangement portion Ha, it is possible to reduce the amount of adhesive 30 that overflows at the other open end of each through hole H.

[0047] Furthermore, with the adhesive applicator 50b of this embodiment and the screw set S using it, one open end of each through hole H is arranged to be blocked by the head T of the screw 10 and the cover member 22, and the other open end of each through hole H is arranged to be blocked by the tape member 21c, so that the adhesive 30 can be sealed at both open end sides of each through hole H. This makes it possible to carry the adhesive applicator 50b to the construction site with the threaded portion N of the screw 10 and the adhesive 30 housed inside the through hole H formed in each applicator body 20b, and also makes it possible to suppress hardening of the adhesive 30, so that the screw 10 can be used immediately when needed.

[0048] Other Embodiments In each of the above embodiments, an adhesive applicator having an applicator body in which a through hole having a circular cross section is exemplified, but the present invention can also be applied to adhesive applicators having an applicator body in which a through hole having a cross section of another shape, such as a polygon such as a rectangle or an ellipse, is formed. [Industrial Applicability]

[0049] As described above, the present invention is extremely useful because it can reduce the burden on the worker and reliably fasten screws into loosened screw holes. [Explanation of symbols]

[0050] H through hole Ha Threaded part arrangement Hb adhesive leak N Threaded part S screw set T head 10 bis 20, 20a, 20b Applicator body 21a, 21b, 21c tape members 22 Cover member 30 Adhesive 50, 50a, 50b Adhesive applicator

Claims

1. An adhesive applicator for applying adhesive to the threads of a screw, an applicator body having one or more through holes formed therein for accommodating the adhesive and for inserting the threaded portion of the screw to adhere the adhesive to the threaded portion; The through hole is arranged so that the head of the screw does not protrude from the applicator body and enter the interior of the through hole, and has a threaded portion placement portion on one open end side for placing the threaded portion of the screw, and an adhesive leakage portion on the other open end side for leaking out any excess adhesive.

2. 2. The adhesive applicator according to claim 1, The through hole has a circular cross-sectional shape, The diameter of the threaded portion arrangement portion is smaller than the diameter of the head of the screw and larger than the diameter of the threaded portion of the screw, An adhesive applicator characterized in that the diameter of the adhesive leaking portion is smaller than the diameter of the threaded portion accommodating portion.

3. The adhesive applicator according to claim 1 or 2, An adhesive applicator characterized in that one open end of the through hole is arranged to be closed by the head of the screw or a cover member that presses the head of the screw.

4. 4. The adhesive applicator according to claim 3, The adhesive applicator is characterized in that the other open end of the through hole is provided so as to be closed by a tape member or a cover member.

5. An adhesive applicator according to claim 1 or 2; a screw having a threaded portion inserted into the through hole; and an adhesive contained inside the through hole.

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