JP2002310121A - Set machine screw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a set machine screw for facilitating screw-in to a member when fastening an adjacent member by the machine screw, and capable of firmly fixing the members while drawing the respective members. SOLUTION: This set machine screw 10 joins and fixes a plurality of mutual adjacent members 12 and 13. A first screw part 14 is arranged in a part being a machine screw shaft part 10a, and biting in a machine screw tip side member 13. A second screw part 15 having a screw pitch P2 (<P1) smaller than the first screw part is arranged in a part biting in a machine screw base end side member 12. Two strips of kerfs 16a and 16b for facilitating the screw-in to the machine screw members 12 and 13 are arranged in the axial direction on a tip side outer peripheral surface of the shaft part 10a of the set machine screw 10. These kerfs are arranged so that mutual end parts overlap in the circumferential direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing screw used for fixing a plurality of adjacent members in a joined state.

[0002]

2. Description of the Related Art For example, a fixing screw as shown in FIG. 7 has been generally used as a member for joining and arranging a pair of panels and the like so as to form a right angle. That is, one panel 31 is arranged at right angles to the other panel 32, and in this state, the screws 33 are screwed into the other panel 32 from the one panel 31 to join the two panels 31, 32 together. ing.

[0003]

However, in the above-mentioned conventional screwing method, the screw 33 in which the screw portion 33a is continuously formed from the distal end portion to the vicinity of the proximal end portion is used. Met. Therefore, when the screw 33 is screwed from one panel 31 to the other panel 32, no pulling force acts between the panels 31 and 32. Therefore, the work must be performed while pressing the panel 31, and the workability is not always good.

For example, Japanese Unexamined Utility Model Publication No. 63-141316 discloses a tap bolt having a threaded portion at a distal end and a proximal end for fixing a panel to a wall surface. However, only the cap nut is screwed into the screw portion at the base end. Therefore, the tap bolt alone cannot exert a pulling force on the panel.

Further, Japanese Utility Model Laid-Open No. 6-8808 discloses a bolt having a triangular screw portion and a wood screw portion at a distal end portion and a proximal end portion, respectively. However, this bolt is only for screwing the nut into the triangular thread portion, and unless the nut is used, the pulling force cannot be applied only by the bolt.

For this reason, in consideration of the above points, it is necessary to take measures to apply a pulling force to the member when the stop screw is screwed in joining and fixing members such as a panel. In this case,
It is also desired to ensure that the stop screw can be easily screwed into the member.

The present invention has been made in view of such circumstances, and when screwing an adjacent member, the screw can be easily screwed into the member, and the members are firmly fixed while drawing the members. The purpose is to provide a stop screw that can be used.

[0008]

In order to meet such an object, a stop screw according to the present invention (the invention according to claim 1) is a stop screw for joining and fixing a plurality of adjacent members. A first screw portion is provided in a portion of the stop screw that bites into a member on the tip side of the screw, and a portion that bites into a member on the proximal end side of the screw is screwed more than the first screw portion. A second thread portion having a small pitch is provided, and at least two cut grooves are provided along the axial direction on the outer peripheral surface of the stop screw on the tip end side of the stopper screw. It is characterized by being arranged so as to overlap in the circumferential direction.

Further, according to the first aspect of the present invention, there is provided a stop screw according to the first aspect of the present invention, wherein
And the screw portion is formed on the shaft portion at an interval.

The stop screw according to the present invention (the invention according to claim 3) is the first stop screw according to claim 1 or claim 2.
From the tip of the screw shaft part to the middle part,
The second screw portion is formed on the base end side of the screw shaft portion.

According to a third aspect of the present invention, in the stop screw according to the third aspect of the present invention, at least two cut grooves are formed at the tip end side of the screw shaft portion to form a first screw portion. It is characterized by being formed so as to extend over the portion.

According to the first, second, third or fourth aspect of the present invention, the stop screw according to the present invention (the fifth aspect of the present invention) comprises a first screw portion and a second screw portion. The thickness of the screw shaft portion between them is substantially equal to or smaller than the diameter of the valley of both threaded portions.

[0013] According to the present invention, when the adjacent member is screwed, the presence of the two cut grooves provided in the outer peripheral surface on the tip end side of the screw shaft portion in the axial direction so as to be displaced in the axial direction allows the stop screw to be formed. Since the bite into the member on the distal end side and the member on the base end side becomes easy and the sliding friction surface with these members becomes small, the shaft tip of the stop screw can be easily screwed into the member. be able to. Such an advantage is apparent from the fact that the above-described kerf plays a role of sending out chips generated when screwing the screw into the screwing member toward the base end side of the keeper screw along the axial direction.

Further, according to the present invention, when the first screw portion is screwed into the member on the screw tip side and the second screw portion is screwed into the member on the screw base end side, pitches are formed in these screw portions. Due to the difference, a pulling force acts on both members in a direction approaching each other. That is, since the first threaded portion on the distal end has a larger thread pitch than the second threaded portion on the proximal end, the amount of bite per rotation of the screw is large. Therefore, the member on the screw tip side exerts a greater pulling force by the screw than the member on the screw base end side. For this reason, between the adjacent members, a force acts in a direction to bring them closer,
The two members can be easily joined together and firmly fixed. In addition, it is possible to improve the assembling accuracy of the structure thus assembled.

Such an advantage can be achieved more reliably by providing an interval between the two screw portions. This is because the first and second screw portions are independently screwed into the adjacent members, so that a strong pulling force can be reliably generated in each of the first and second screw portions.

Further, by making the screw shaft portion between the first and second screw portions substantially equal to or smaller than the diameter of the roots of the two screw portions, the screw shaft portion is located on the base end side. The member can easily enter the member on the tip side from the member, and the fixing operation with the screw can be easily performed.

[0017]

1 to 4 show a first embodiment of a stop screw according to the present invention. In these drawings, a stop screw 10 is used for a structure 1 such as a building.
1, for example, a panel 12 as two members,
13 are used when connecting and fixing.

As shown in FIG. 2, the structure 11 in this embodiment is configured such that the panel 12 as one member has a substantially right angle so as to form a T-shape with the end surface of the panel 13 as the other member. And in this state, one panel 1
It is assembled by screwing the stop screw 10 from 2 into the other panel 13.

A head portion 10b is formed at the base end of the shaft portion 10a of the stop screw 10, and a first screw portion 14 serving as a wood screw is formed at a portion from the front end to the middle portion of the shaft portion 10a.
However, a second screw portion 15 which is also a wood screw is formed in the base end portion. First screw portion 1 of the screw 10
4 and the second screw portion 15 are formed with a predetermined interval therebetween.

Here, the pitch P2 of the second threaded portion 15 on the intermediate side is larger than the pitch P1 of the first threaded portion 14 on the tip side.
Is formed to be small. When the screw 10 is screwed into both panels 12 and 13, the first screw portion 14 cuts into the panel 13 on the screw tip side, and the second screw portion 15 cuts into the panel 12 on the screw base end side. It has become. Also, the shaft portion 1 between the two screw portions 14 and 15
The thickness of Oa is substantially equal to the diameter of the valleys of the two screw portions 14 and 15.

Further, two cut grooves 16 (16a, 16b) are double-cut on the outer peripheral surface on the distal end side of the shaft portion 10a of the stop screw 10 in a state where the first screw portion 14 is partially applied from the distal end portion. It is formed along the axial direction by performing processing and the like. These cut grooves 16 (16a, 16b)
The ends are arranged so as to overlap in the circumferential direction.

The two cut grooves 16 (16a, 1)
According to 6b), it is easy to bite into the member 12 on the distal end side of the stop screw 10 and further to the member 13 on the base end side, and the sliding friction surface with each member 12, 13 is reduced. The tip of the shaft portion 10a of the ten
3 can be screwed very easily.
As described above, screwing can be easily performed by the cut groove 16 (16a, 16b) because
It can be easily understood that b) plays a role of sending out chips generated at the time of screwing into the members 12 and 13 to be screwed to the base end side of the locking screw 10 along the axial direction.

Here, the two cut grooves 16 (16)
1a and 16b) may be formed in the outer peripheral surface on the distal end side of the stop screw 10 by a spiral groove slightly inclined with respect to the axis as shown in FIG. This allows
When the stop screw 10 is screwed in, it can be properly bitten.

Further, the above-described two cut grooves 16 (16)
a, 16b) are, as shown in FIGS. 1 (A) and 1 (B), a tip side and a subsequent cut formed along the axial direction in a state where the ends are arranged so as to overlap in the circumferential direction. The grooves 16a and 16b are formed at positions shifted in the circumferential direction. However, the present invention is not limited to this, and these two cut grooves 16a and 16b may be continuously formed at substantially the same position in the circumferential direction. In short, two (or more) cut grooves 16 (16a, 16b) are arranged on the outer peripheral surface on the distal end side of the set screw 10 such that their ends overlap in the circumferential direction. , May be formed along the axial direction.

When assembling the pair of panels 12 and 13 at right angles by using such a set screw 10, as shown in FIG. 3, the set screw 10 is screwed from one panel 12 to the other panel 13. Then, the first screw portion 14 of the screw 10
Bites into the panel 13 on the screw distal end side, and the second screw portion 15 bites into the panel 12 on the screw proximal end side. At this time, the pitch P1 of the first screw portion 14 is
Since the pitch P2 is larger than the pitch P2 of 5, the panel 13 on the screw distal end side is drawn to the panel 12 on the screw proximal end side.

At this time, the shaft 1 between the two screw portions 14 and 15
Since the diameter of Oa is approximately the same thickness as the valleys of both screw portions 14 and 15, the shaft portion 10a can easily enter from one panel 12 into the other panel 13.

Thereafter, as shown in FIG.
When the head 10b abuts on the surface of one of the panels, one of the panels 12 is pressed against the other panel 13 by an operator acting on the head 10b via a fastening jig such as a driver. Can be For this reason, in addition to the pulling force based on the pitch difference between the first screw portion 14 and the second screw portion 15, an external force acting in a direction to narrow the gap between the panels 12 and 13 acts, and the screw tip ends. Side panel 13
Is strongly drawn to the panel 12 on the screw base end side.

Therefore, even if one of the panels 12 is curved and deformed and a gap is formed between the joining surfaces of the panels 12 and 13, the gap is compressed and reduced, and the panels 12 and 13 are shown in FIG. As shown in FIG. Therefore, as shown in FIG. 2, the assembling accuracy of the adjacent panels 12 and 13 screwed is good, and a highly rigid structure 11 can be obtained, and the workability thereof is good.

FIG. 5 shows a second embodiment of the present invention. In FIG. 5, the same or corresponding parts as those described in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description is omitted.

In the second embodiment, as shown in FIG. 5, a panel 18 as one member is screwed to an end surface of a panel 19 as another member so as to form a substantially L-shape. Thereby, the structure 17 is assembled. Also, in the second embodiment, similarly to the first embodiment, the screw 10 having the first screw portion 14 and the second screw portion 15 having different pitches is used.

In the second embodiment, as in the case of the above-described first embodiment, panels 18 and 19 are provided.
When the screws are screwed, the fixing screws 10 can be screwed in easily to firmly fix both panels 18 and 19,
It is possible to obtain a highly rigid structure 17 having good assembling accuracy.

FIG. 6 shows a third embodiment of the present invention. In this figure, the same or corresponding parts as those in the first and second embodiments described above are denoted by the same reference numerals and detailed description is given. Description is omitted.

In the third embodiment, as shown in FIG. 6, the panels 21 and 22 as a pair of members are arranged so as to form a plane, and the panels 21 and 22 are arranged.
The structure 20 is assembled by screwing the joint ends 22 together.

In this case, in this embodiment,
A screw 10 having substantially the same configuration as that of the first embodiment is screwed obliquely from one panel 21 side to the other panel 22 side, and viewed from the other panel 22 side to one panel 21 side. Similarly, by screwing diagonally,
The two panels 21 and 22 are joined and fixed.

Therefore, also in the third embodiment, the screws 10 are used to fix the panels 21 and 22 in the same manner as in the first and second embodiments described above.
Can be easily screwed into the panels 21 and 22, and a force can be obtained that draws the opposite ends of the panels 21 and 22 in the direction of approaching each other. For this reason, both panels 21 and 22 can be firmly fixed, and a highly rigid structure 20 with good assembling accuracy can be obtained.

The present invention is not limited to the structure described in each of the above embodiments, and it goes without saying that the shape, structure, etc. of each part can be appropriately modified or changed. For example, in each of the above-described embodiments, the first screw 1
Although the interval between the fourth screw portion 15 and the second screw portion 15 is provided, the second screw portion 15 may be formed closely without providing this interval.

Further, the formation range of the second screw portion 15 is as follows.
The structure is not limited to the structure shown in FIGS.
The second screw portion 15 may be formed to extend also on the head portion 10b of the shaft portion 10a.

Further, a shaft portion 10a between the two screw portions 14 and 15 is provided.
May be formed to be smaller than the diameter of the valleys of the two threaded portions 14 and 15, and the screws 10 may be used for purposes other than screw fixing of the adjacent panel, such as screw fixing of the adjacent square material. It can also be used for

In each of the above-described embodiments, the two cut grooves 16 (16a, 16a, 16a, 16a,
16b) is formed on the outer peripheral surface on the distal end side of the shaft portion 10a of the stop screw 10 along the axial direction with a part of the first screw portion 14 being applied, but the present invention is not limited to this.
In short, at least two cut grooves 16 are formed along the axial direction in a stepwise manner so that the groove ends overlap in the circumferential direction in a state where the screw 10 can be easily screwed. I just need.

[0040]

As described above, according to the stop screw according to the present invention, the first and second screw portions having different screw pitches are provided on the shaft portion of the screw, and the front end side of the screw portion of the screw is provided. On the outer peripheral surface, at least two kerfs are provided along the axial direction for facilitating the screwing operation, and these kerfs are formed so that their ends overlap in the circumferential direction. Therefore, despite the simple structure, various excellent effects listed below are exhibited.

That is, according to the present invention, it is possible to screw the tip of the screw into the member very easily, and it is possible to firmly fix the adjacent member while pulling the member when screwing the adjacent member.

Further, according to the stop screw of the present invention, by forming the first and second screw portions on the shaft portion at intervals, a strong pulling force can be generated between both members. As a result, both members can be more firmly fixed. Furthermore, according to the stop screw according to the present invention, as described above, a plurality of members can be assembled and fixed in an appropriate joint state, and a structure with excellent assembly accuracy can be obtained.

[Brief description of the drawings]

1A and 1B show a first embodiment of a fixing screw according to the present invention, wherein FIG. 1A is a schematic side view, and FIG. 1B is a sectional view taken along line BB.

FIG. 2 is a sectional view of a main part showing a structure assembled with the stopper screw of FIG. 1;

FIG. 3 is a sectional view of an essential part for explaining a screw fixing process of the structure of FIG. 2;

FIG. 4 is a cross-sectional view of a main part showing a state further advanced than FIG. 3 for explaining the screw fixing process of FIG. 2;

FIG. 5 shows a second embodiment of the present invention, and is a cross-sectional view of a principal part showing a modification of the screwed structure.

FIG. 6 shows a third embodiment of the present invention, and is a cross-sectional view of a principal part showing a further modified example of the screwed structure.

FIG. 7 is a cross-sectional view of a main part of a structure assembled using a conventional stopper screw.

[Explanation of symbols]

10 Stop screw, 10a Shaft, 10b Head, 11
Structure, 12, 13 Panel (member), 14 First screw part, 15 Second screw part, 16 (16a, 16b)
Kerf, 17 ... structure, 18, 19 ... panel (member),
20: Structure, 21, 22 ... Panel (member).

Claims (5)

[Claims] 1. A stop screw for joining and fixing a plurality of members adjacent to each other, wherein a first screw portion is provided on a shaft portion of the stop screw that bites into a member on a tip end side of the screw. A second threaded portion having a smaller thread pitch than the first threaded portion is provided in a portion that bites into the member on the screw base end side, and at least two cut grooves are formed on the outer peripheral surface of the shaft end of the stop screw. The cutting screw is provided along the axial direction, and these cut grooves are arranged so that their ends overlap in the circumferential direction. 2. The stop screw according to claim 1, wherein the first screw portion and the second screw portion are formed at intervals on the shaft portion. 3. The screw according to claim 1, wherein the first screw portion is formed from a tip end of the screw shaft portion to the middle portion, and the second screw portion is formed on a base end side of the screw shaft portion. Stop screw characterized by being formed. 4. The stop screw according to claim 3, wherein at least two cut grooves are formed so as to extend over a portion where the first screw portion is formed on a tip end side of the screw shaft portion. Screw. 5. The stop screw according to claim 1, 2, 3, or 4, wherein the thickness of the screw shaft between the first screw portion and the second screw portion is set to be equal to each other. A fixing screw characterized by having a diameter substantially equal to or smaller than the diameter of the thread.