JPH10281131A - Screw member - Google Patents

Abstract

(57) [Problem] To provide a screw member having good mountability to a member to be mounted. SOLUTION: In a screw member 30 (50) inserted and fixed in a mounting hole 22B (23A) of a member to be mounted, mounting portions 31, 32 (5) are provided on the outer peripheral side of the screw member 30 (50).
1, 52), and the mounting portions 31, 32 (51, 52).
Are provided at a plurality of positions on the outer surface in the screw axis direction, and the protrusions 38 (5, 5) of the mounting portions 31, 32 (51, 52) are provided.
8) is pressed into the mounting hole 22B (23A) of the member to be mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw member suitable for connecting components of a handle of a cleaning tool.

[0002]

2. Description of the Related Art Conventionally, as a screw member for connecting components of a handle of a cleaning tool, for example, the following male screw member and female screw member formed of plastic are used.

[0003] The male screw member is formed by mounting a bolt in a mold so as to insert the bolt into a plastic mounting portion to form the mounting portion.

[0004] The female screw member is formed by inserting a core screw into a mold so that the plastic mounting portion is provided with a female screw.

[0005] To attach the male screw member and the female screw member to the member to be mounted, the mounting portions of the screw members are inserted into the mounting holes of the member to be mounted, and the outer peripheral portion of the mounting hole of the member to be mounted is mounted. By caulking, the mounting portions of these screw members can be fixed.

[0006]

However, the prior art has the following problems. The screw member is fixed to the mounting member by caulking. If the caulking is too strong, the mounting portion of the screw member is cracked. If the caulking is too weak, the mounting portion of the screw member may fall off the mounting member. There is. That is, the attachment property of the screw member to the attached member is poor.

[0007] In forming the male screw member, it is difficult to improve the positioning accuracy of the bolt which is disposed in the mold and is insert-molded, and there is a possibility that the male screw portion may have dimensional abnormality.

[0008] If the removal of the molded product from the mold during the molding of the female screw member is unsuccessful, the core screw is re-inserted into the molded product, and there is a possibility that the screw may be crushed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a screw member which can be easily attached to a member to be attached.

[0010] Another object of the present invention is to prevent a male screw portion from being dimensionally abnormal when forming a male screw member.

Another object of the present invention is to prevent the female screw portion from being crushed when the female screw member is formed.

[0012]

According to a first aspect of the present invention, in a screw member to be inserted and fixed in a mounting hole of a member to be mounted, a mounting portion is provided on an outer peripheral side of the screw member. Protrusions are provided at a plurality of positions in the screw axis direction on the outer surface of the protruding portion, and the rising angle of the rising surface on the opposite side to the screw axis direction of the protrusion is larger than the rising angle of the rising surface on the tip side in the screw axis direction of the protrusion. The mounting portion is set gently, and the protrusion of the mounting portion is pressed into the mounting hole of the member to be mounted.

According to a second aspect of the present invention, in the first aspect of the present invention, the outer diameter of the protrusion provided on the outer surface of the mounting portion of the screw member is larger than the inner diameter of the mounting hole of the member to be mounted. The outer diameter of a valley between adjacent projections is set to be smaller than the inner diameter of a mounting hole of a member to be mounted.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the screw member further comprises a pair of half mounting portions and a bolt, and both the half mounting portions are heads of the bolt. It is provided with a bolt holding portion for holding the portion side so as to be integrally connectable.

According to a fourth aspect of the present invention, in the third aspect of the present invention, further, the half mounting portion of the screw member is engaged with the bolt holding portion with the square head of the bolt, and the bolt is connected to the bolt. It is provided with a square detent part for detent.

According to a fifth aspect of the present invention, in the first or second aspect of the present invention, the screw member comprises a pair of half mounting portions, and both half mounting portions have female screw portions. And can be integrally connected.

The present invention described in claim 6 provides the invention according to claims 1 to 5
Further, in the present invention according to any one of the first to third aspects, a temporary fixing rib which can be temporarily fixed to a mounting hole of a member to be mounted is provided on a side opposite to a tip end of the mounting portion of the screw member in a screw axis direction from a protruding portion. It is made to become.

The present invention according to claim 7 provides the invention according to claims 1 to 6
In the present invention according to any one of the first to third aspects, the attached member may be a constituent member of a handle of a cleaning tool.

According to the first aspect of the present invention, the following operations are provided. By press-fitting the protrusion provided on the mounting portion of the screw member into the mounting hole of the mounted member, the screw member can be mounted without caulking. At this time, protrusions were provided only at a plurality of positions in the screw axis direction on the outer surface of the mounting portion of the screw member, and the protrusions were press-fitted into the mounting holes of the member to be mounted, so that they were in contact with the mounting portion of the screw member. The contact area with the mounting hole of the member to be mounted can be made small, and the insertion resistance can be made small, or the insertion resistance can be made small by bending deformation of the projection itself during insertion. Also,
Since the rising angle of the rising surface on the side opposite to the screw shaft of the projection, that is, on the side of the insertion advancing direction into the mounting hole, has been made relatively gentle, it is possible to press-fit the mounting hole relatively smoothly, so that the mounting portion does not crack. Can be Further, since the rising angle of the rising surface on the tip side in the screw axis direction of the protrusion, that is, the drawing direction side from the mounting hole, is relatively large, the pull-out resistance strength is increased and the protrusion can be securely fixed.

According to the present invention, the following effects are obtained. The outer diameter of the protrusion provided on the outer surface of the mounting portion of the screw member is larger than the inner diameter of the mounting hole of the mounted member, and the outer diameter of the valley between adjacent protrusions is smaller than the inner diameter of the mounting hole of the mounted member. Since it is set, the protrusion provided on the mounting portion of the screw member can be securely pressed into the mounting hole of the mounted member.

According to the third aspect of the present invention, the following operations are provided. Since the male screw member holds the bolt between the bolt holding portions of the pair of half mounting portions, insert molding of the bolt is not required, and dimensional abnormality of the male screw portion can be prevented.

According to the present invention, there is provided the following operation. Since the half mounting portion of the male screw member is provided with the detent portion for the bolt, the bolt can be easily held in the half mounting portion in the detented state.

According to the fifth aspect of the present invention, the following operations are provided. Since the female screw member forms the female screw portion by the pair of half mounting portions, the core screw is not required, and the crushability of the female screw portion can be prevented.

According to the present invention, there is provided the following operation. Since temporary fixing ribs are provided on the mounting portions of the male screw member and the female screw member, when these screw members are mounted in the mounting holes of the member to be mounted, first, the temporary fixing ribs of the mounting portions are used to temporarily mount the mounting holes. The mounting workability can be improved by stopping and then press-fitting the protrusion of the mounting portion into the mounting hole.

According to the present invention, the following effects are obtained. By attaching the male screw member or the female screw member to the component member of the handle of the cleaning tool, the screw connection structure of the component member of the handle of the cleaning tool can be improved.

[0026]

FIG. 1 is a schematic view showing a cleaning tool to which the present invention is applied, FIG. 2 is a schematic view showing a grip of a handle of the cleaning tool, and FIG. 3 is a schematic view showing a connecting pipe of the handle of the cleaning tool. FIG. 4
Is a schematic view showing a connection portion between the grip and the connection pipe, FIG. 5 is a schematic diagram showing a connection portion between the connection pipe and the connection pipe, FIG. 6 is a schematic diagram showing an attachment portion of the male screw member, and FIG. FIG. 8 is a schematic view showing a state in which a bolt is assembled into a mounting portion of a member, FIG. 8 is a schematic diagram showing a bolt, FIG. 9 is a schematic view showing an assembled state of a male screw member, and FIG. FIG.

The cleaning tool 10 shown in FIG. 1 has a cleaning sheet holding plate 13 provided at an end of a handle 11 via a joint portion 12 such as a cruciform joint, and the cleaning sheet wound around a foam bottom 14 of the holding plate 13. Can be engaged with the sheet engaging portions 15 provided at the four corners of the upper surface of the holding plate 13. The user can clean the cleaning sheet holding plate 13 by rotating the cleaning sheet holding plate 13 freely back and forth and left and right with respect to the handle 11 due to the presence of the joint portion 12.

The handle 11 includes a grip 21 and a connecting pipe 2
2, 23, 24 and a joint rod 25, and these components can be connected by a male screw member 30 and a female screw member 50. That is, in FIG.
Male screw member 30 and connecting pipe 22 provided at the lower end of
Female screw member 50 provided at the upper end of the connecting pipe 22, the male screw member 30 provided at the lower end of the connecting pipe 22 and the female screw member 50 provided at the upper end of the connecting pipe 23, and provided at the lower end of the connecting pipe 23. The male screw member 30 and the female screw member 50 provided at the upper end of the connecting pipe 24, the male screw member 30 provided at the lower end of the connecting pipe 24 and the female screw member provided at the upper end of the joint rod 25 Each of the 50 can be screwed.

That is, the male screw member 30 is pressed into the mounting hole 21A provided at the lower end of the grip 21 (FIG. 2).
A female screw member 50 is press-fitted into a mounting hole 22A provided at an upper end of the connecting pipe 22, and a male screw member 30 is press-fitted into a mounting hole 22B provided at a lower end of the connecting pipe 22 (FIG. 3). A female screw member 50 is press-fitted into a mounting hole 23A provided at an upper end of the connection pipe 23, and a male screw member 30 is press-fitted into a mounting hole 23B (not shown) provided at a lower end of the connection pipe 23. Is done. In addition, connecting pipe 24
A female screw member 50 is press-fitted into a mounting hole 24 (not shown) provided at the upper end of the connecting pipe 24, and a male screw member 30 is press-fitted into a mounting hole 24B (not shown) provided at the lower end of the connection pipe 24. You. Also, a mounting hole 25 provided at the upper end of the joint rod 25 is provided.
A (not shown) is press-fitted with a female screw member 50. Then, the male screw member 30 press-fitted into the grip 21 and the female screw member 50 press-fitted into the connecting pipe 22 are screwed as shown in FIG. The female screw member 50 press-fitted into the connecting pipe 23 is screwed together with the female screw member 50 press-fitted into the connecting pipe 23 as shown in FIG. Are screwed together, the male screw member 30 press-fitted into the connecting pipe 24 and the female screw member 50 press-fitted into the joint rod 25 are screwed together, and the entire handle 11 is joined.

Hereinafter, the male screw member 30 and the female screw member 5
Each of 0 will be described. (Male screw member 30) (FIGS. 6 to 9) The male screw member 30 is composed of a pair of half mounting portions 31, 32 (FIG. 6) and a bolt 41 (FIG. 8) (FIG. 9). .
The attachment portions 31 and 32 are formed from plastics such as nylon and joined by hinges 33. Mounting part 3
1 and 32 can be opened and closed to each other via a hinge 33 so as to be integrally connected to each other, and a positioning convex portion 34A and a positioning concave portion 34B for positioning lock in a closed position.
Are provided on the respective half surfaces of the mounting portions 31 and 32 (FIG. 6).

Then, the mounting portion 31 of the male screw member 30,
32 is provided with each of concave bolt holding portions 35A and 35B for holding the head 41A and the neck 41B of the bolt 41 on their half surfaces (FIG. 7), and the head side of the bolt 41 in the closed state is provided. The male screw portion 41C is made to protrude by being pinched (FIG. 9). Here, the male screw member 30
The mounting portions 31 and 32 are provided with rectangular detent portions 36 for engaging the rectangular head 41A of the bolt 41 on the bolt holding portions 35A and 35B to prevent the bolt 41 from rotating (FIGS. 7 and 9).

The mounting portions 31, 3 of the male screw member 30 are provided.
2 is a mounting hole 21 for a grip 21, a connecting pipe 22, and the like.
At the front end of the cylindrical outer surface to be inserted into A, 22B, etc., a flange 37 for positioning the insertion end into the mounting holes 21A, 22B, etc. is provided, and a bolt neck cover 37A is overhanged at the front end of the flange 37. doing.

The mounting portions 31, 3 of the male screw member 30
2 has protrusions 38 at a plurality of positions in the screw axis direction of the male screw member 30 on the cylindrical outer surface following the flange 37. Each protrusion 38 may be a ring-shaped protrusion that does not spirally connect to each other, or may be a spiral protrusion that spirally connects to each other. The protruding portion 38 of the male screw member 30 sets the rising angle θb of the rising surface 38B on the tip side opposite to the screw axis direction to be gentler than the rising angle θa of the rising surface 38A on the tip side in the screw axis direction. 21, connecting pipe 22
Are press-fitted into the mounting holes 21A, 22B and the like. At this time,
The outer diameter of the protrusion 38 of the mounting portions 31 and 32 is
For example, when the diameter is about 14 mm with respect to the inner diameter of 22B or the like, the diameter can be increased by about 0.5 to 0.1 mm to enable the above-described press-fitting. In addition, the adjacent protrusions 38, 3 of the mounting portions 31, 32,
The outer diameter of the valley between 8 is set smaller than the inner diameter of the mounting holes 21A and 22B.

The mounting portions 31, 3 of the male screw member 30 are also provided.
2 is a mounting hole 21A for a grip 21, a connecting pipe 22, etc., on the side opposite to the screw axis direction from the projection 38 on the cylindrical outer surface;
In the process of assembling to the mounting holes 21A, 22B, etc.
A temporary fixing rib 39 that can be temporarily fixed to B or the like is provided.

(Female Screw Member 50) (FIG. 10) The female screw member 50 includes a pair of half mounting portions 51 and 52. The attachment portions 51 and 52 are molded bodies made of plastic such as nylon and joined by hinges 53. The mounting portions 51 and 52 can be opened and closed to each other via a hinge 53 so as to be integrally connected to each other. The positioning convex portion 54 and the positioning concave portion 54B for positioning lock in the closed position are respectively attached to the mounting portion 51 and the mounting portion. 52 are provided on each half surface (FIG. 10).

The mounting portion 51 of the female screw member 50,
52 is provided with a female screw portion 55 on a half surface thereof, and forms a female screw portion 55 into which the male screw portion 41C of the bolt 41 of the male screw member 30 can be screwed in the closed state. ing.

The mounting portions 51, 5 of the female screw member 50
2 is provided with a flange 56 for positioning the insertion end into the mounting hole 22A or the like at the tip of the cylindrical outer surface inserted into the mounting hole 22A or the like of the connecting pipe 22 or the like, and the male screw member 30 described above. A guide hole 57 for receiving the bolt neck cover 37A is provided on the inner diameter side of the flange 56.

The mounting portions 51, 5 of the female screw member 50
2 has projections 58 at a plurality of positions in the screw axial direction on the cylindrical outer surface following the flange 56. Each of the protrusions 58 may be a ring-shaped protrusion that is not spirally connected to each other, or may be a spiral-shaped protrusion that is spirally connected to each other. The protruding portion 58 of the female screw member 50 sets the rising angle θb of the rising surface 58B on the tip side in the screw axis direction to be gentle compared to the rising angle θa of the rising surface 58A on the tip side in the screw axis direction,
It is press-fitted into the mounting hole 22 or the like of the connecting pipe 22 or the like. At this time, the outer diameter of the protrusion 58 of the mounting portions 51 and 52 is
For example, when the diameter is about 14 mm with respect to the inner diameter of A or the like, the above-described press-fitting is made possible by increasing the diameter by about 0.5 to 0.1 mm. The outer diameter of the valley between the adjacent protrusions 58, 58 of the mounting portions 51, 52 is set smaller than the inner diameter of the mounting hole 22A or the like.

The mounting portions 51, 5 of the female screw member 50
2 is a temporary fixing rib which can be temporarily fixed to the connection hole 22A or the like in the process of assembling to the attachment hole 22A or the like of the connection pipe 22 or the like on the side opposite to the screw axis direction from the protrusion 58 of the cylindrical outer surface. 59 (not shown).

Accordingly, the male screw member 30 and the male screw member 50 are used as follows. (1) The mounting portions 31 and 32 of the male screw member 30 are opened, and the head 41A and the neck 41B of the bolt 41 are incorporated into the bolt holding portions 35A and 35B of the mounting portions 31 and 32, and the head 41A of the bolt 41 is assembled. Is engaged with the rectangular rotation preventing portions 36 of the bolt holding portions 35A and 35B. After this, the male screw member 3
The mounting portions 31 and 32 are closed, and the positioning is locked by the positioning protrusions 34A and the positioning recesses 34B.

The male screw member 30 is press-fitted into the mounting holes 21A and 22B of the grip 21, the connecting pipe 22, and the like. The insertion end of the male screw member 30 into the mounting hole 21A of the grip 21 is located at a position where the flange 37 of the male screw member 30 abuts the insertion end positioning step 21B of the grip 21. The insertion end of the male screw member 30 into the attachment hole 22 </ b> B of the connection pipe 22 is located at a position where the flange 37 of the male screw member 30 abuts against the end face of the connection pipe 22.

(2) Mounting portions 51 and 52 of female screw member 50
Is closed, and the positioning is locked by the positioning projection 54A and the positioning recess 54B.

The female screw member 50 is pressed into the mounting hole 22A of the connecting pipe 22 or the like. Mounting hole 22 of connecting pipe 22
A, the insertion end of the female screw member 50 is
Of the connecting pipe 22 abuts on the end face of the connecting pipe 22.

(3) Male screw member 30 provided in mounting hole 21A of grip 21, female screw member 50 provided in mounting hole 22A of connecting pipe 22, mounting hole 22B of connecting pipe 22
Male screw member 30 provided in the mounting hole 23A of the connecting pipe 23, the male screw member 30 provided in the mounting hole 23B of the connecting pipe 23, and the connecting pipe 24.
The female screw member 50 provided in the mounting hole 24A of the connecting pipe 24, the male screw member 30 provided in the mounting hole 24B of the connecting pipe 24, and the female screw member 50 provided in the mounting hole 25A of the joint rod 25 are screwed respectively. , Constituting the entire handle 11.

When the male screw member 30 is press-fitted into the mounting hole 21A of the grip 21, the distal end surface of the grip 21 is projected so as to form a pipe cover 21C (FIG. 2C). Thereby, the mounting hole 2 of the grip 21
When the female screw member 50 provided in the mounting hole 22A of the connecting pipe 22 is screwed into the male screw member 30 provided in 1A (FIG. 4), the end of the connecting pipe 22 fits into the pipe cover 21C of the grip 21. And as a result, the pipe cover 21C
The presence of the overlap margin L prevents the shaft 21 from eccentrically moving between the grip 21 and the connecting pipe 22, and prevents the male screw member 30 from being pressed into the mounting hole 21 </ b> A of the grip 21.
This is useful for extending the overall life of the handle 11 when the grip 21 is made of a plastic having a low strength, while the connecting pipe 22 and the like are made of a metal pipe having a high strength.

Therefore, according to the present embodiment, the following operations are provided. Projection 3 provided on attachment portions 31 and 32 of male screw member 30
8 is a mounting hole 21A for a grip 21, a connecting pipe 22, etc.
The male screw member 30 can be attached without press-fitting by press-fitting into the 22B or the like. At this time, protrusions 38 are provided only at a plurality of positions on the outer surface of the mounting portions 31 and 32 of the male screw member 30 in the screw axis direction, and the protrusions 38 are provided in the mounting holes 21A and 22B of the grip 21, the connection pipe 22, and the like. The male screw member 30 is press-fitted to make contact.
The contact area between the mounting portions 31 and 32 and the mounting holes 21A and 22B of the grip 21, the connecting pipe 22 and the like can be reduced, and the insertion resistance can be reduced, or the insertion resistance can be reduced by bending deformation of the projection 38 itself during insertion. Can be reduced. In addition, the rising angle θb of the rising surface 38B on the side opposite to the screw shaft of the protruding portion 38, that is, on the side of the insertion advance direction into the mounting holes 21A and 22B, is made relatively gentle, so that the mounting holes 21A and 22B are made relatively smoothly.
Etc., so that the mounting portions 31 and 32 can be prevented from cracking. In addition, the rising angle θa of the rising surface 38A on the tip side in the screw axis direction of the protrusion 38, that is, on the drawing direction side from the mounting holes 21A, 22B, etc., is relatively tight. .

The female screw member 50 is mounted without crimping by press-fitting the projections 58 provided on the mounting portions 51 and 52 of the female screw member 50 into the mounting holes 22A and the like of the connecting pipe 22 and the like. it can. At this time, the female screw member 5
The protrusions 58 are provided only at a plurality of positions in the screw axis direction on the outer surfaces of the mounting portions 51 and 52 of the No. 0, and the protrusions 58 are press-fitted into the mounting holes 22A and the like of the connecting pipe 22 and the like, so that
Mounting portions 51 and 52 of female screw member 50 and connecting pipe 22
The contact area with the mounting hole 22A or the like can be made small, and the insertion resistance can be made small, or the insertion resistance can be made small by bending deformation of the projection 58 itself during insertion. In addition, since the rising angle θb of the rising surface 58B on the side opposite to the screw shaft of the protrusion 58, that is, on the side of the insertion advance direction into the mounting hole 22A or the like, is relatively gentle,
Pressing into the mounting hole 22A or the like can be performed relatively smoothly.
1, 52 can be prevented from cracking. Further, the rising angle θ of the rising surface 58A on the tip side in the screw axis direction of the protrusion 58, that is, on the drawing direction side from the mounting hole 22A or the like.
Since “a” is relatively tight, the pull-out resistance strength can be increased and fixed reliably.

In each of the male screw member 30 and the female screw member 50, the outer diameter of the projections 38, 58 of the mounting portions 31, 32, 51, 52 is larger than the inner diameter of the mounting holes 21A, 22B, 22A, etc. Adjacent protrusions 38, 38, 58, 58
Are set smaller than the inner diameters of the mounting holes 21A, 22B, 22A and the like. Therefore, the mounting portions 31, 32,
The projections 38, 58 provided on the mounting holes 21A, 21
Press fitting into 2B, 22A, etc. is possible.

The male screw member 30 comprises a pair of half mounting portions 3
Since the bolts 41 are held between the bolt holding portions 35A and 35B of the first and second bolts, insert molding of the bolts 41 becomes unnecessary, and dimensional abnormality of the male screw portion 41C can be prevented.

The half mounting portions 31, 3 of the male screw member 30
2 is provided with the detent portion 36 for the bolt 41, so that the bolt 41 can be easily held between the half-mounting portions 31 and 32 in a detented state.

The female screw member 50 is formed of a pair of half mounting portions 5.
Since the female screw portion 55 is formed by 1 and 52, the core screw is not required, and the crushability of the female screw portion 55 can be prevented.

Temporarily fixing ribs 39, 59 are attached to the mounting portions 31, 32, 51, 52 of the male screw member 30 and the female screw member 50.
Provided, the screw members 30, 50 are attached to the mounting holes 21A, 22
A, 22B, etc., first, the mounting parts 31, 3
Temporarily fix the mounting holes 21A, 22A, 22B and the like using the temporary fixing ribs 39, 59 of 2, 51, 52, and then the mounting portion 3
By press-fitting the projections 38, 58 of 1, 32, 51, 52 into the mounting holes, the mounting workability can be improved.

By attaching the male screw member 30 or the female screw member 50 to the member of the handle 11 of the cleaning tool 10, the screw connection structure of the member of the handle 11 of the cleaning tool 10 can be improved.

In the male screw member 30 (same for 50), the entire area of the portion provided with the protrusion 38 on the outer surface of the male screw member 30 is A, where the protrusion 38 contacts the mounting hole 21A or the like. When the area to be processed is B, B / A is preferably 30 to 70%. If it is less than 30%, the frictional force required to prevent slipping out cannot be secured, and it will not be possible to secure it securely. If it exceeds 70%, the frictional force with the mounting hole will be large, or the bending deformation when inserting the projection itself will be small. Therefore, the insertion resistance cannot be reduced.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design can be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, the present invention is not limited to the screw member for connecting the handle of the cleaning tool, but can be widely used as a general screw member.

[0056]

As described above, according to the present invention, it is possible to obtain a screw member having good mountability to a member to be mounted.

Further, according to the present invention, when forming the male screw member, it is possible to prevent the dimensional abnormality of the male screw portion.

Further, according to the present invention, the crushability of the female screw portion can be prevented when the female screw member is formed.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a cleaning tool to which the present invention is applied.

FIG. 2 is a schematic view showing a grip of a handle of a cleaning tool.

FIG. 3 is a schematic view showing a connecting pipe of a handle of a cleaning tool.

FIG. 4 is a schematic view showing a connection portion between a grip and a connection pipe.

FIG. 5 is a schematic view showing a connecting portion between connecting pipes;

FIG. 6 is a schematic view showing a mounting portion of a male screw member.

FIG. 7 is a schematic view showing a state where a bolt is assembled into a mounting portion of a male screw member.

FIG. 8 is a schematic view showing a bolt.

FIG. 9 is a schematic view showing an assembled state of a male screw member.

FIG. 10 is a schematic view showing a mounting portion of a female screw member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cleaning tool 11 Handle 21 Grip 22-24 Connecting pipe 25 Joint rod 21A, 22A, 22B Mounting hole 30 Male screw member 31, 32 Mounting part 35A, 35B Bolt holding part 36 Detent part 38 Projection 38A, 38B Rising surface 39 Temporary fixing rib 41 Bolt 50 Female screw member 51, 52 Mounting part 55 Female screw part 58 Projection 58A, 58B Rising surface 59 Temporary fixing rib

Claims (7)

[Claims] 1. A screw member inserted into and fixed to a mounting hole of a member to be mounted, wherein a mounting portion is provided on an outer peripheral side of the screw member, and projections are provided at a plurality of positions on an outer surface of the mounting portion in a screw axis direction. The rising angle of the rising surface on the opposite side of the screw axis direction of the protrusion is set gently as compared to the rising angle of the rising surface on the side of the screw axis direction of the protrusion,
A screw member, wherein a protrusion of the mounting portion is press-fitted into a mounting hole of a member to be mounted. 2. An outer diameter of a protrusion provided on an outer surface of a mounting portion of the screw member is larger than an inner diameter of a mounting hole of a member to be mounted, and an outer diameter of a valley between adjacent protrusions is smaller than that of the member to be mounted. 2. The screw member according to claim 1, wherein the screw member is set smaller than the inner diameter of the mounting hole. 3. The screw member comprises a pair of half-mounting portions and a bolt, and both half-mounting portions include a bolt holding portion for holding a head side of the bolt so as to be integrally connectable. Or the screw member according to 2. 4. The screw member according to claim 3, wherein the half-mounting portion of the screw member has a rectangular detent portion on the bolt holding portion for engaging the rectangular head of the bolt to prevent the bolt from rotating. 5. The screw member according to claim 1, wherein said screw member comprises a pair of half-mounting portions, and both half-mounting portions have female screw portions so as to be integrally connectable. 6. A temporary fixing rib which can be temporarily fixed to a mounting hole of a member to be mounted, on a side opposite to a tip end in a screw axis direction from a portion where a protrusion is provided in a mounting portion of the screw member.
6. The screw member according to any one of 5. 7. The screw member according to claim 1, wherein the attached member is a component of a handle of a cleaning tool.