JPH045767Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] This invention relates to wood screws.

[Prior Art] Conventionally, adhesives, wood screws, and other means such as welding have been used to join two objects together. Various types of wood screws have been used for joining with wood screws, including round wood screws, countersunk wood screws, and round wood screws. Furthermore, there are wood screws with a flange integrated into the head so that the flange acts as a washer, and a washer with a funnel-shaped center part to fit the head and prevent it from coming off. There is one in which the peripheral edge of the washer is bent downward and bit into the surface of the adhered material to prevent the peripheral edge of the washer from standing up and to prevent loosening of the screw to maintain the tightened state.
(Refer to Publication No. 10834 and Publication No. 1983-30761).

[Problems to be solved by the invention] However, when attaching a hinge using the above-mentioned conventional wood screws, the wood screws a used are countersunk wood screws or round countersunk wood screws, as shown in FIGS. 5 and 6. The through holes f drilled in each of the wing pieces d of the hinge c require rough machining to correspond to the tapered neck area, and when the hinge is installed in an exposed part to the outside, This had the disadvantage that the precision of the planing process had to be increased, making the manufacture of the hinge complicated and raising the price.

Furthermore, as shown in Figure 7, if round wood screws are used to attach hinge c and the round wood screws comply with JIS standards, it is not necessary to flatten the hinge c, but the head If the height H of the part is large and the hinge is used in the same way as when using the above-mentioned countersunk wood screw or round countersunk wood screw, the heads b of the wood screws a may come into contact with each other, and the outer diameter dimension D of the shaft tube e If, for example, the roof or key cover of an upright piano is attached via this hinge, there will be a large gap between the hinges and the opening/closing condition and appearance of the hinge (particularly if the outer diameter If the dimension D is large, the gap becomes large, which is a serious problem for pianos.Also, when attaching the wing piece d, it becomes necessary to cut deeply into the plate side.

In addition, if the above-mentioned round plank wood screw is 2.4 x 10 (nominal diameter x length JIS), the head protrusion dimension K is 0.6 mm.
It is. Also, if the round wood screw is 2.4 x 10, the head height H is 1.8 mm, and the hinge blade thickness t is 1.0 mm, the outer diameter D of the shaft cylinder must be 5.6 mm or more. It must be done. Furthermore, when using a truss machine screw with a screw designation of M2.5, the head height must be 1.5 mm and the outer diameter of the hinge shaft cylinder must be 5.0 mm or more.

This invention was devised in consideration of the above-mentioned disadvantages of the conventional screws, and aims to provide a wood screw that eliminates the need for smoothing the hinge and has a small head height.

[Means for Solving the Problems] This invention, which was made to achieve the above-mentioned object, is such that each wing of the hinge that opens and closes with the pin shaft inside is arranged so that the diameter of the pin shaft when the hinge is closed is A wood screw for fixing the wings of the hinge to an adherend by allowing them to face each other closely at a smaller interval, the head height being smaller than half of the spacing between the wings when the hinge is closed, and the outer periphery of the back surface. A head having a flat surface that presses the wing to the side of the hinge to which the wing is attached is provided in the vicinity, and a thick wall portion that is connected to the back surface of the head and has a length that is longer than at least a thickness corresponding to the thickness of the wing of the hinge. and a cross hole bored from the upper surface of the head to a position extending from a position where the head and the underneck are connected to the underneck side.

[Function] In this invention, a thick part is provided under the neck corresponding to the thickness of the wing piece to reinforce the under neck, reduce the height of the head, and insert a thick part into the through hole of the wing piece of the hinge. This method does not require any smooth machining, and the protrusion of the wood screw head from the wing piece is made smaller.

[Example] Next, this invention will be explained in detail based on the example shown in FIGS. 1 to 4.

In the figure, 1 is a wood screw. The lower neck of the wood screw 1 has a thick wall portion 4 that tapers toward the threaded portion 3 at a portion corresponding to the inner periphery of the through hole h drilled in the wing piece g of the hinge. The maximum outer diameter of the thick portion 4 is set to be equal to or smaller than the inner diameter of the through hole h of the blade g. Further, on the outer periphery of the back surface of the head 2 of the wood screw 1, there remains a flat surface 20 that comes into pressure contact with the surface of the wing piece g. Furthermore, the head height dimension H is set to be smaller than half of the spacing between the opposing wings when the hinge is closed. and,
The cross recess 21 is drilled to reach the thick part 4, but since the thick part 4 expands into a tapered shape and reinforces the lower part of the neck, the lower part of the neck does not break when tightening the screw. There is no such thing.

Further, as shown in the second embodiment shown in FIG. 2, a tapered thick wall portion 5 may be provided entirely under the neck without leaving the cylindrical portion on the threaded portion 3 side under the neck. Furthermore, as shown in the third embodiment shown in FIG. 3, if a thick cylindrical wall portion 6 corresponding to the through hole h is provided in the entire area under the neck, the effect of reinforcing the area under the neck is further improved.

[Effects of the invention] As explained above, this invention enables the blades of a hinge that opens and closes with the pin shaft inside to face each other closely at an interval smaller than the diameter of the pin shaft when the hinge is closed. , a wood screw for fixing a wing of a hinge to an object to which it is attached, which has a head height dimension smaller than half of the distance between the opposing wings when the hinge is closed, and which has a head height smaller than half of the distance between the wings when the hinge is closed, and the wing is attached to the object of the hinge near the outer periphery of the back side. a head having a flat surface that presses toward the side; a lower neck that is connected to the back surface of the head and has a thick part longer than at least a length corresponding to the thickness of the wing of the hinge; and a lower neck that extends from the top surface of the head The device is characterized by comprising a cross hole drilled from at least a position where the head and the under-neck are connected to a position extending to the under-neck side.

Therefore, according to this invention, the area under the neck is reinforced by the thick part, so even if the height of the head is reduced and the cross hole is drilled until it reaches the thick part, the area under the neck will not break. The head protrudes from the wing piece of the hinge without the need for a flattening process when using wood screws or round countersunk wood screws where the protruding dimension of the head from the wing piece of the hinge is zero or small. The wing piece can be attached using the wood screw of the present invention, which has a small protruding dimension, and the through hole is hidden by the head of the wood screw, which spoils the appearance of the screw attachment part of the wing piece, and even the entire hinge. There is no.

In addition, since the head height dimension is smaller than half of the distance between the opposing wings when the hinge is closed, if the hinge is used to attach a lid etc. in a rotatable manner and the wings of the hinge face each other, each wing may be The heads of the wood screws that are being fixed no longer touch each other. Furthermore, since the outer diameter of the hinge shaft is the same as that of the hinge that was installed using countersunk screws, and the outer diameter of the hinge shaft that was installed using round wood screws is smaller, This has excellent practical effects, such as being able to use a hinge and reducing the gap between two adherends.

[Brief explanation of drawings]

Fig. 1 is a side view showing the first embodiment of the wood screw according to this invention, Fig. 2 is a side view showing the second embodiment, Fig. 3 is a side view showing the third embodiment, and Fig. 4 is a side view showing the second embodiment. An explanatory diagram showing the mounting state according to the first embodiment, FIGS. 5 to 7 show the conventional example, FIG. 5 is an explanatory diagram showing the mounting state with countersunk wood screws, and FIG. 6 shows the mounting state with round countersunk wood screws. FIG. 7 is an explanatory diagram showing the state of attachment using round wood screws. 1... Wood screw, 2... Head, 3... Screw part,
4, 5, 6... Thick part, g... Wing piece, h... Through hole.

Claims (1)

[Claims for Utility Model Registration] The blades of a hinge that opens and closes with the pin shaft inside can be closely opposed to each other at an interval smaller than the diameter of the pin shaft when the hinge is closed, so that the blades of the hinge can be opened and closed with the pin shaft inside. A wood screw to be fixed to an adherend, which has a head height smaller than half of the distance between the wing pieces when the hinge is closed, and has a flat surface near the outer periphery of the back surface that presses the wing piece toward the adherend side of the hinge. a head part having a neck part connected to the back surface of the head part and having a thick part longer than at least a thickness corresponding to the thickness of the wing of the hinge; A wood screw characterized by comprising: a cross recess drilled from a position connected to the underneck to a position extending to the underneck side.