JP2015197159A - Screw-hole-provided screw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw-hole-provided screw that has an additional function which can fasten a fastening object by a sub screw which is screwed into a screw hole formed in a main screw, and is hard to give a main screw the influence by the operation of tightening/loosening the sub screw.SOLUTION: A screw-hole-provided screw 1 includes an engagement part 11 for screw rotation in a screw head 10, and a screw hole 12 formed in the screw head 10. The screw hole 12 is formed eccentrically from the central axis of the screw.

Description

The present invention relates to a screw with a screw hole provided with a screw hole in a screw head. In particular, the present invention relates to a screw with a screw hole having an additional function capable of fastening a fastener by a secondary screw screwed into a screw hole formed in the main screw when the screw with a screw hole is a main screw.

Conventionally, as a screw with a screw hole provided with a screw hole at the head of the screw, for example, one disclosed in Patent Document 1 is disclosed. This screw with a screw hole is a screw with a screw hole used for fixing a connector for connecting a cord for connecting with an external device in an electronic device. (Fig. 6)

The screw with a screw hole is formed with a cross groove 15 that can be engaged with a cruciform driver at the open end portion of the screw hole 14 of the head 13, and the screw with a cruciform screw is operated by the screw driver. Can do. By providing the axis of the screw and the center of the cross groove on the same axis, the screw with a screw hole can be operated with a cross-shaped screwdriver.

As a result, even if it is necessary to operate both the screw with a screw hole and the screw with a cross groove at the same time and in the same process in the assembly line of the equipment, a box-type driver is unnecessary and the driver needs to be replaced. Instead, each screw can be attached with the same driver, and the work efficiency is improved.

On the other hand, as a screw having an additional function, as shown in Patent Document 2, there is one in which a fitting portion that is further fitted to a work tool that rotates the screw portion is formed at a tip portion of the screw. (Fig. 7)

This screw can be rotated by fitting a cross-shaped driver, for example, into a fitting portion provided at the tip of the screw. The positional relationship between the screw shaft and the fitting portion is the same as that of the screw with screw hole shown in Patent Document 1, and the screw shaft and the center of the fitting portion are provided on the same axis to fit the cross-shaped driver. It is possible to rotate the screw.

Japanese Patent Laid-Open No. 10-288213 (FIG. 1) Japanese Utility Model Publication No. 3-123110 (FIGS. 9 to 12)

The screw described above is useful as an additional function to the screw,
When the auxiliary screw to be screwed into the main screw is screwed / removed, a force is directly applied in the rotation direction of the main screw, which may affect the tightening state.

For example, when the auxiliary screw is screwed into the main screw, a force that is tightened to the main screw side is applied in conjunction with the screwing of the auxiliary screw. This increases the tightening force on the main screw side. On the other hand, when removing the auxiliary screw, a force in the direction of removing is applied to the main screw side in conjunction with the removal of the auxiliary screw. Thereby, it is assumed that the tightening force on the main screw side becomes small.

The screw hole diameter of the secondary screw is naturally smaller than the diameter of the main screw, so the applied torque is relatively small, but especially when the tightening torque of the screw is specified. There is a concern about the influence on the tightening state of the main screw.

Then, this invention is made | formed in view of the said subject, Comprising: It is a screw with a screw hole provided with the additional function which can fasten a fastening thing with the subscrew screwed in the screw hole formed in the main screw, An object of the present invention is to provide a screw with a screw hole in which the influence of the tightening operation / removal operation on the auxiliary screw side hardly affects the main screw side.

The screw with a screw hole according to the present invention is configured to solve the above-described problem, and has a screw rotation engaging portion on the screw head,
A screw with a screw hole in which a screw hole is formed in the screw head,
The screw hole may be formed so as to be deviated from the axial center of the screw.

According to such a configuration, it is possible to form a screw hole while avoiding a screw rotation engaging portion (for example, a cross groove that can be engaged with a cross-shaped driver) provided at the center of the screw shaft. Thereby, a fastening thing can be fastened, without competing with the said engaging part. Also, since the screw hole is formed by deviating from the screw shaft center, it is difficult to directly transmit the rotational force of the screw screwed into the screw hole, and the influence of the tightening / removal operation of the screw screwed into the screw hole is affected by the screw hole screw. It is possible to provide a screw with a screw hole that is difficult to reach to the side.

In addition, a configuration in which a plurality of the screw holes are formed point-symmetrically with respect to the axial center of the screw with a screw hole can be employed.

According to such a configuration, a plurality of fasteners can be fastened by screws screwed into the screw holes. In addition, since it is formed point-symmetrically with respect to the axial center of the screw with screw hole, there is no directionality when forming the screw hole, and the mass productivity of the screw with screw hole can be improved.

As described above, according to the present invention, a screw hole screw having an additional function capable of fastening a fastening object by a sub screw screwed into a screw hole formed in the main screw can be tightened on the sub screw side. It is possible to provide the influence of the removal operation on the main screw side with difficulty.

The perspective view of the screw with a screw hole which shows 1st Embodiment is shown. The perspective view of the state which attached the subscrew to the screw with a screw hole of a 1st embodiment is shown. The screw with a screw hole of a 1st embodiment and a top view and a side view in the state where a subscrew was attached to this screw with a screw hole are shown. The screw with a screw hole which shows 2nd Embodiment, and the top view of the state which attached the subscrew to this screw with a screw hole are shown. The top view of the screw with a screw hole which shows 3rd Embodiment is shown. The screw with a screw hole in a prior art example is shown. The screw in a prior art example is shown.

Hereinafter, the present invention will be described with reference to embodiments.
(Embodiment 1)
First, the external configuration of the screw 1 with a screw hole according to the present embodiment will be described with reference to FIGS. 1 to 3. The screw 1 with a screw hole according to the present embodiment has a general pan-screw-like appearance. Further, the screw 1 with a screw hole is defined as “main screw 1”, and the screw 2 screwed into the screw hole of the screw 1 with screw hole is defined as “sub screw 2”.

A screw with a screw hole (main screw) 1 according to the first embodiment includes a pan-shaped screw head 10 and a screw portion 13 extending from a central portion of the screw head 10.

The screw head 10 has an engaging portion 11 for one rotation of the screw with a screw hole. The engaging part 11 forms a cross groove so that the cross driver can engage. In addition to the cross-shaped driver, a single groove may be formed so that a minus driver can be engaged.

Further, the screw head 10 has a screw hole 12 in addition to the engaging portion 11. The screw hole 12 is formed at a position deviated from the axial center of the screw. In this embodiment, as shown in FIG. 3C, the groove direction of the cross groove that is the engaging portion 11 is set. When considered as the x-axis direction and the y-axis direction, the center of the screw hole 12 is formed in a direction of approximately 45 degrees.

As shown in FIG. 3A, the screw hole 12 is formed at an angle from the surface side of the screw head 10 toward the main screw shaft.

FIGS. 2 and 3B and 3D show views in which the auxiliary screw 2 is screwed into the screw hole 12 of the main screw 1.

Since the screw hole 12 is formed at a position deviated from the axial center of the main screw 1, it does not compete with the screw rotation engaging portion 11 when the auxiliary screw 2 is mounted. When tightening / removing the sub-screw 2, a constant force in the tightening direction / force in the removal direction is applied to the main screw 1, but the sub-screw 2 is deviated from the axial center of the main screw 1. The rotational force when operating is not directly transmitted to the main screw side, and the influence of the tightening operation / removal operation on the sub screw side can be made difficult to the main screw side.

When a crimp terminal is used as the fastener, the crimp terminal can be connected to the screw head 10 by inserting the auxiliary screw 2 into the crimp terminal in advance and screwing it into the screw hole 12.

(Embodiment 2)
Next, the second embodiment will be described with reference to FIGS. The screw 1 with a screw hole according to the second embodiment has a general upset machine screw-like appearance. Similarly to the first embodiment, the screw 1 with a screw hole is defined as “main screw 1”, and the screw 2 screwed into the screw hole of the screw 1 with screw hole is defined as “sub screw 2”.

A screw with a screw hole (main screw) 1 according to the second embodiment includes a cylindrical screw head 10 and a screw portion 13 extending from a central portion of the screw head 10.

The screw head 10 has an engaging portion 11 for screw rotation with a screw hole. The engaging part 11 forms a cross groove so that the cross driver can engage. In addition to the cross-shaped driver, a single groove may be formed so that a minus driver can be engaged.

Further, the screw head 10 has a screw hole 12 in addition to the engaging portion 11. The screw hole 12 is formed at a position deviated from the axial center of the screw. In this embodiment, as shown in FIG. 4C, the groove direction of the cross groove that is the engaging portion 11 is set. When considered as the x-axis direction and the y-axis direction, the center of the screw hole 12 is formed in a direction of approximately 45 degrees.

As shown in FIG. 4B, the screw hole 12 is formed from the surface side of the screw head 10 in parallel with the main screw axis in the screw extending direction.

FIGS. 4B and 4D show views in which the sub screw 2 is screwed into the screw hole 12 of the main screw 1.
The screw head 10 and the screw head of the auxiliary screw 2 are mounted in parallel.

Also in this embodiment, since the screw hole 12 is formed at a position deviated from the axial center of the main screw 1, it does not compete with the screw rotation engaging portion 11 when the auxiliary screw 2 is mounted. When tightening / removing the sub-screw 2, a constant force in the tightening direction / force in the removal direction is applied to the main screw 1, but the sub-screw 2 is deviated from the axial center of the main screw 1. The rotational force when operating is not directly transmitted to the main screw side, and the influence of the tightening operation / removal operation on the sub screw side can be made difficult to the main screw side.

When a crimp terminal is used as the fastener, the crimp terminal can be connected to the screw head 10 by inserting the auxiliary screw 2 into the crimp terminal in advance and screwing it into the screw hole 12.

(Embodiment 3)
Next, a third embodiment will be described with reference to FIG. FIG. 5 shows the screw head 10 side of the screw 1 with the screw hole. The screw with a screw hole according to the third embodiment is different from the above-described embodiment in the number of screw holes 12 and the formation position thereof.

As shown in FIG. 5, four screw holes 12a to 12d are formed at positions rotated by 45 degrees with respect to the screw shaft center indicated by the intersection of the x axis and the y axis in the drawing. These screw holes 12 are formed in point symmetry.

Also in this embodiment, since the screw hole 12 is formed at a position deviated from the axial center of the main screw 1, it does not compete with the screw rotation engaging portion 11 when the auxiliary screw 2 is mounted. When tightening / removing the sub-screw 2, a constant force in the tightening direction / force in the removal direction is applied to the main screw 1, but the sub-screw 2 is deviated from the axial center of the main screw 1. The rotational force when operating is not directly transmitted to the main screw side, and the influence of the tightening operation / removal operation on the sub screw side can be made difficult to the main screw side.

When a crimp terminal is used as the fastener, the crimp terminal can be connected to the screw head 10 by inserting the auxiliary screw 2 into the crimp terminal in advance and screwing it into the screw hole 12.

In addition, a plurality of fasteners can be fastened. In addition, since it is formed point-symmetrically with respect to the axial center of the screw with screw hole, there is no directionality when forming the screw hole, and the mass productivity of the screw with screw hole can be improved.

In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

For example, in the embodiment, a general pan head screw or an upset head screw is shown, but in addition to this, a screw head such as a hexagon bolt type screw, a truss screw, a screw whose head is a truncated cone or the like is used. It is applicable if it has screws.

Moreover, you may change the diameter direction of the screw head 10 about the position which forms the screw hole 12, according to the magnitude | size of a screw hole.

Further, in FIG. 5, the distance from the center of the main screw and the diameter of the screw hole of each screw hole (12 a to 12 d) may be different.

Thereby, the screw from which the diameter of a subscrew differs can be used for a fastening.

DESCRIPTION OF SYMBOLS 1 Screw with screw 10 Screw head 11 Screw rotation engaging part 12 Screw hole 13 Screw part

Claims (2)

While having a screw rotation engagement portion on the screw head,
A screw with a screw hole in which a screw hole is formed in the screw head,
A screw with a screw hole, wherein the screw hole is formed by deviating from the axial center of the screw.
2. The screw with a screw hole according to claim 1, wherein a plurality of the screw holes are formed point-symmetrically with respect to an axial center of the screw.

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