JP3226664U - Insert nut and screw receiving structure for mounted members - Google Patents

Abstract

PROBLEM TO BE SOLVED: To insert a screw body into a screw hole by a simple sliding operation without directly visually observing the opening portion of the screw hole and to quickly and accurately bring the tip of the screw body into the opening portion with a low load. Provided is an insert nut that can be guided, and a screw receiving structure for a member to be attached. An insert nut (1) is connected to a cylinder shaft portion (11) having an internal thread (111) formed on an inner wall thereof, and has a funnel shape that is connected to the inside of the cylinder shaft portion and has an inner diameter that expands outward on the side opposite to the cylinder shaft portion. And a flange portion 12 which has a slanting surface portion 122 over a predetermined axial length and which guides the slidable surface portion of the threaded body in which the male screw is engraved to the slidable surface portion into the cylindrical shaft portion. .. At least a part of the inclined surface portion is formed into a spherical surface convex toward the cylinder shaft portion. [Selection diagram] Figure 1

Description

The present invention relates to an insert nut and a screw receiving structure for a member to be attached. Specifically, when a threaded part (hereinafter referred to as “screw body”), such as a bolt, having a male screw engraved on a part or all of the shaft portion is screwed into the screw hole, the opening of this screw hole The present invention relates to an insert nut that can quickly and accurately guide the tip of a screw body to the inside of an opening with a low load and a screw receiving structure of a member to be attached by a simple sliding operation without directly observing.

Conventionally, there is a screw receiving structure in which a nut is embedded in a hole formed in a base material, and a screw body is screwed into a screw hole formed in the nut to be fixed. In particular, it is widely adopted in the field of woodworking furniture, and as such a nut, an insert nut as described in Patent Document 1 is proposed. The structure of this insert nut is shown in FIG.

The insert nut 9 shown in FIG. 12 has a cylindrical shaft portion 91 in which a female screw 911 is engraved in a part of the inner peripheral surface to form a screw hole, and one end portion of the cylindrical shaft portion 91. Is a disc-shaped flange portion 92 that is flush with the surface 991 of the object to be attached 99, and a synthetic resin tube-shaped object that is attached to the cylinder shaft portion 91, and is different from the cylinder shaft portion 91 and the flange portion 92. The body is provided with a locking portion 93 in which a plurality of retaining projections 931 are provided on the surface portion.

By attaching the insert nut 9 having such a structure to the hole formed in the object to be attached 99 such as a plate material, the object to be attached 99 has a threaded hole, and the screw body can be screwed. It will be possible. In this case, the flange portion 92 that abuts the surface 991 of the object to be attached 99 has a flush structure in which the surface 921 is located on substantially the same plane as the surface 991 of the object to be attached 99.

JP, 2010-7777, A

By the way, in the insert nut 9 described above, an opening 912 of a screw hole is formed substantially in the center of the flange portion 92 in a plan view. In the opening 912, an edge portion of an inner end connected to the inside of the cylinder shaft portion 91 (hereinafter , “Inner edge”) 912a and an outer edge portion of the outer end (hereinafter, referred to as “outer edge”) 912b are formed at substantially the same position. Moreover, the opening diameter of the outer edge 912b is substantially the same as the outer diameter of the shaft portion of the screw body to be screwed.

For this reason, when the outer diameter of the screw body is small, the opening 912 is also small. Therefore, in combination with the flush structure of the flange 92, it is difficult to grasp the position of the opening 912 by hand, and the opening of the insert nut 9 is difficult. In order to screw the screw body into the portion 912, it is necessary to visually grasp the position of the opening 912 accurately. In particular, when the insert nut 9 is arranged at a position where it cannot be seen directly, such as the back surface of the plate material located at a position lower than the line of sight of the user, the user may go under the plate material to open the opening. Since it is necessary to visually recognize the position of 912, it takes a lot of time and labor, and the work efficiency of the work for attaching the screw body is reduced and the work load is increased.

Further, the back surface side, which is an invisible portion, is often not subjected to end surface treatment such as deburring or chamfering, and there is a risk of scratching the hand with burrs or sharp portions when groping.

In addition, when the tip of the screw body cannot be accurately guided to the inside of the opening 912 regardless of whether the mounting work is performed visually or by groping, the screw body is largely decentered from the axial center of the tubular shaft portion 91. It may be inserted into the opening 912 in this state, and each screw thread may be damaged by unreasonable screw insertion, or the screwed state between the male screw on the outer peripheral surface of the screw body and the female screw in the cylinder shaft part is insufficient. There is a risk of falling off during use.

The present invention has been made in view of the above points, and when the screw body is screwed into the screw hole, the screw is operated by a simple sliding operation without directly observing the opening of the screw hole. An object of the present invention is to provide an insert nut that can guide the tip of a body into the opening portion quickly and accurately with a low load, and a screw receiving structure for a mounted member.

In order to achieve the above object, the insert nut of the present invention has a cylindrical shaft portion having an internal thread engraved on the inner wall and an inner diameter that is connected to the inside of the cylindrical shaft portion and is outward toward the side opposite to the cylindrical shaft portion. A flange part that has an expanding funnel-shaped slope part over a specified axial length, and slides the tip of a screw body with a male screw engraved on the slope part to guide the tip into the cylinder shaft part. With.

Since the insert nut is provided with the above-mentioned cylinder shaft portion, the screw body inserted through the inclined surface portion formed on the flange portion has a male screw on the outer peripheral surface thereof and a female screw inside the cylinder shaft portion screwed together. However, it can be detachably attached to the insert nut. The mounting structure is not particularly limited.

Here, the cylindrical shaft portion may have a locking structure formed on the outer peripheral surface. In this case, when the tubular shaft portion is inserted into the hole of the mounted member, a locking force such as a frictional force is generated between the locking structure and the inner wall of the hole, which causes the insert nut to fall off the mounted member. It is possible to prevent the cylindrical shaft portion from idling with respect to the inner wall of the hole.

The "locking structure" is, for example, a mode in which a plurality of difficult-to-deform projections are provided, a plurality of elastically deformable projections, and the outline of the tip of the projection is set to be larger than the inner diameter line of the hole of the mounted member. As described above, when the cylindrical shaft portion is inserted into the hole to be inserted, the locking structure causes friction with the inner wall of the hole, as in the tapered shape in which the base end side is larger in diameter than the front end side. The structure is not particularly limited as long as the cylindrical shaft portion can be prevented from idling with respect to the inner wall of the hole by generating a locking force such as force. Therefore, it can be locked in the hole by inserting or the like. In this case, the outer peripheral surface of the cylinder shaft portion may have a straight cylinder shape without any locking structure portion.

Further, the flange portion is provided with a funnel-shaped inclined surface portion which is connected to the inside of the cylindrical shaft portion and whose inner diameter expands outward on the side opposite to the cylindrical shaft portion over a predetermined axial length. It is possible to secure a sliding surface of a size large enough to pass the tip of the screw body between the outer edge and the inner edge. Moreover, it is possible to reliably prevent the tip of the screw body from sliding at a steep angle and colliding with the inside of the cylinder shaft portion, or being locked in a part where the diameter is enlarged in the middle of the sliding surface. The tip of the screw body can be slid smoothly on the inclined surface portion toward the inside of the cylinder shaft portion and can be accurately guided.

In addition, in the flange portion, by sliding the tip of the screw body having the male screw engraved on the inclined surface portion so that the tip is guided into the cylindrical shaft portion, the user grips the screw body, Insert the tip of the screw into the above-mentioned sliding surface using the outer edge of the bevel as a guide, and then slide the tip of the screw body through the inner edge of the bevel to find the inside of the cylinder shaft. Can be reliably led to.

With the above configuration, it is not necessary to visually check the position of the opening of the insert nut when screwing the screw body into the screw hole of the insert nut attached to the member to be attached. It is possible to improve efficiency and reduce the work load. Further, even when groping, it is possible to prevent the user's hand from coming into direct contact with the back surface side of the member to which the insert nut is attached, etc., and there is no risk of the hand being injured by burrs or sharp parts. In addition, it is possible to move the tip of the screw body along the above-mentioned sliding surface with good accuracy and gradually move it into the cylinder shaft portion, thereby suppressing the misalignment of the screw body with respect to the shaft center of the cylinder shaft portion. It is possible to reliably prevent damage to the screw threads and dropping of the screw body during use.

The "slope" is a shape in which the inner diameter gradually increases from the inner edge to the outer edge, conversely, a shape in which the inner diameter gradually decreases from the outer edge to the inner edge. It is not particularly limited as long as it is, for example, the shape of the slope portion may be a spherical surface convex toward the cylinder shaft portion side, which will be described later, or one end of the cylinder shaft portion on the slope surface portion side. It may be in the shape of a pyramid having a vertex. Further, the sliding surface described above is formed from the outer end edge to the inner end edge of the inner surface of the sloped portion having such a shape, which is large enough to pass the tip of the screw body.

Further, when at least a part of the inclined surface portion is formed in a spherical surface convex toward the cylinder shaft portion, the screw body that has entered the inclined surface portion is in a state of being inclined with respect to the axis of the cylinder shaft portion. Also, the inclination state is corrected to some extent (hereinafter, referred to as “inclination correction action”) while passing through the spherical region of the slope portion, and the screw body can be smoothly screwed into the screw hole. The convex spherical surface portion of the slope may be a partial region of the slope or the entire region.

In addition, in the slope portion, a gentle slope area is formed in a region from the outer edge of the slope portion to the middle portion in the axial direction, and a gentle slope area is formed in the region of the slope portion from the middle portion in the axial direction to the inner edge. When a steep slope area with a larger inclination angle than the slope area is provided, the tip of the screw body that has slid on the surface of the mounted member first enters the gentle slope area and slides gently while Part of the screw body that has been guided in a rough direction toward the section and then slid on the gentle slope area and reached the side edge on the cylinder shaft side, while being suddenly dropped into the steep slope area, Will be guided in the exact direction towards.

Thus, the tip of the screw body can be gradually directed toward the cylinder shaft portion while passing from the gentle slope area to the steep slope area, and can be guided even more accurately into the cylinder shaft portion. Moreover, while passing through the steep slope area, the above-described inclination correcting action is further promoted, the shaft center of the screw body and the cylinder shaft portion can be substantially aligned, and the male screw on the outer peripheral surface of the screw body and the cylinder shaft portion It is possible to reliably normalize the screwed state between the female screws and more smoothly screw the screw body into the screw hole.

In addition to the gentle slope area and the steep slope area, the configuration of the slope portion includes three steps including a slope having an intermediate angle between the gentle slope area and the steep slope area, and a plurality of steps of four steps or more. May be

Also, in the gentle slope area, a first gentle slope that is connected to the outer edge of the slope portion and introduces the tip of the screw body into the slope portion, and an inclination angle smaller than that of the first gentle slope, and the tip of the screw body is formed. If a second gentle slope that gently moves the slope to the steep slope area is provided, the first gentle slope having a larger inclination angle than the second gentle slope causes a drop between the outer edge of the slope and the second gentle slope. Can be set to a large value, and with this drop as a guide, the user can reliably insert the tip of the screw body from the outer edge into the slope part, further improving the work efficiency of the screw body installation work. And work load can be reduced.

Further, when the maximum inner diameter of the outer end edge of the inclined surface portion is set to 3 times or more and 10 times or less of the maximum inner diameter of the cylindrical shaft portion, the guide operation of the tip of the screw body is suitably performed by the funnel-shaped inclined surface portion. ..

Specifically, if the maximum inner diameter of the outer edge of the sloped portion is less than three times the maximum inner diameter of the cylinder shaft portion, the sloped portion is the same size as a normal screw hole. It is difficult to insert the end edge into the sliding surface using it as a guide, and it is not easy to reach the tip of the screw body to the cylindrical shaft portion, which is not preferable. On the other hand, if the maximum inner diameter of the outer edge of the bevel exceeds 10 times the maximum inner diameter of the cylinder shaft, the curvature and inclination angle are large enough to smoothly guide the tip of the screw body to the cylinder shaft. It is necessary to increase the thickness of the flange significantly in order to ensure that the insert nut with such a thick and large diameter looks unattractive and easily interferes with other components such as the mounted member. Since the insert nut may hinder the structural design of the device in which it is used, it is not preferable.

In order to achieve the above object, the screw receiving structure of the mounted member according to the present invention has a female screw portion provided on the mounted member to which a screw body having a male screw is attached, and a female screw portion connected to the inside of the female screw portion. It has a funnel-shaped sloped surface whose inner diameter expands outward on the side opposite to the threaded part over a predetermined axial length.By sliding the tip of the screw body on the sloped part, And a guide portion that leads into the female screw portion.

Further, since the screw receiving structure of the mounted member includes the above-mentioned female screw portion, the screw body inserted through the inclined surface portion formed in the guide portion has a male screw on the outer peripheral surface and a female screw portion inside the female screw portion. It can be detachably attached to a member to be attached by being screwed with a female screw.

Further, by providing the guide portion with a funnel-shaped slope portion which is connected to the inside of the female screw portion and whose inner diameter expands outward on the side opposite to the female screw portion over a predetermined axial length, the slope portion is formed. It is possible to secure a sliding surface of a size large enough to pass the tip of the screw body between the outer edge and the inner edge. In addition, it is possible to reliably prevent the tip of the screw body from sliding at a steep angle and colliding with the inside of the female screw portion or being locked in a part where the diameter is enlarged in the middle of the sliding surface. The tip of the screw body can be slid smoothly on the inclined surface portion toward the inside of the female screw portion and can be accurately guided.

In addition, in the guide portion, the user grasps the screw body by sliding the tip of the screw body onto the slope portion so that the tip is guided into the female screw portion, and the tip is attached to the slope portion. It is possible to guide the tip of the screw body through the inner end edge of the sloped surface into the female thread portion by inserting the outer end edge as a guide into the sliding surface and then sliding it. ..

With the above configuration, it is not necessary to visually check the position of the opening of the screw hole when inserting the screw body into the screw hole of the female screw part, improving the work efficiency of the screw body installation work and work. The load can be reduced. Further, even when groping, it is possible to prevent the user's hand from coming into direct contact with the back surface side of the mounted member provided with the screw receiving structure, etc., and there is no risk of the hand being injured by burrs or sharp parts. .. In addition, the tip of the threaded body can be gradually and accurately moved into the female threaded portion along the sliding surface described above, and the misalignment of the threaded body with respect to the axial center of the female threaded portion can be suppressed. It is possible to reliably prevent damage to the screw threads and dropping of the screw body during use.

Further, when the female screw portion has a cylindrical body which is inserted and fixed in a predetermined hole of the mounted member and has an internal thread engraved on the inner wall thereof, the female member is not affected by the material of the mounted member. A threaded portion can be provided. For example, if the member to be attached is wood or stone such as plywood, it is generally difficult to engrave female threads directly on the inner wall of the hole, but a tubular body engraved with female threads is inserted and fixed. By doing so, the female screw portion can be provided even on the attached member such as wood.

Further, when the female screw portion is formed by directly engraving the female screw in the predetermined hole of the mounted member, it is necessary to procure and insert and fix the tubular body having the female screw engraved therein. It becomes unnecessary, and the structure of the female screw portion can be simplified. If the member to be attached is synthetic resin or the like, a female screw can be engraved in the hole by using a tap or the like.

The insert nut according to the present invention and the screw receiving structure for the member to be attached are such that when the screw body is screwed into the screw hole, the screw body can be simply slid without the need to directly observe the opening of the screw hole. It is possible to quickly and accurately guide the tip of the to the inside of the opening with a low load.

1 is a perspective view of an insert nut according to a first embodiment of the present invention as viewed from a bottom surface side. It is a side view of the insert nut shown in FIG. FIG. 3 is a sectional view taken along the line AA of FIG. 2. It is a bottom view of the insert nut shown in FIG. FIG. 2 is a longitudinal cross-sectional view explanatory view showing a state in which a tip of a bolt is used to search for an opening in a member to which the insert nut shown in FIG. 1 is inserted and fitted. It is a longitudinal cross-sectional explanatory drawing which shows the state in which the bolt was screw-inserted in the to-be-attached member which inserted and inserted the insert nut shown in FIG. The modification of the insert nut of this invention is shown, (a) is modification 1, (b) is modification 2, (c) is modification 3. FIG. 6 is a vertical sectional view of the insert nut according to the second embodiment of the present invention. It is a perspective explanatory view which shows a 3rd embodiment of the present invention, and looked at the screw receiving structure of a member to be attached from the bottom side. FIG. 10 is a vertical cross-sectional explanatory view showing a state in which the opening is searched by the tip of a bolt in the screw receiving structure of the attached member shown in FIG. 9. It is a longitudinal section showing modification 4 which is a modification of a screw receiving structure of an attached member of the present invention. The insert nut of patent document 1 is shown, (a) is a front view, (b) is a vertical cross-sectional schematic diagram, (c) is a longitudinal section of the state which inserted the insert nut into the hole formed in the plate material of to-be-attached object. FIG.

An embodiment of the present invention will be described in more detail with reference to FIGS. It should be noted that the reference numerals in each drawing are attached within a range that reduces complexity and facilitates understanding.

[First Embodiment]
The insert nut 1 will be described with reference to FIGS. 1 to 6.
The insert nut 1 is made of synthetic resin, includes a cylinder shaft portion 11 and a flange portion 12, and is integrally molded. Each part will be described in detail below. For the sake of explanation, the “upper surface” of the flange portion 12 is a portion to which the tubular shaft portion 11 is fixed, and is used as the upward surface of FIGS. 1 to 3, and is referred to as the “bottom surface” of the flange portion 12. Is a surface located on the “opposite side of the cylinder shaft portion” and is used as a downward surface of FIGS. 1 to 3.

The cylinder shaft portion 11 is a cylinder body having both ends open, a free end on the front end side, and a flange 12 on the base end side. The female screw 111 is engraved on the inner wall while the outer peripheral surface is locked. A structure portion 112 is provided (see FIG. 3). In addition, in the present embodiment, the locking structure 112 has a so-called bamboo-shaped shape in which irregularities are continuous in the longitudinal direction, but the invention is not limited to this, and as described above, the locking structure of various modes can be used. Can be adopted.

The flange portion 12 has a hollow disk shape in plan view, and the base end side of the cylinder shaft portion 11 is fixed to the flat upper surface of the flange portion 12 so as to be orthogonal to the axis of the cylinder shaft portion 11 (see FIG. 2 ). ), the fixing position between the base end side of the cylindrical shaft portion 11 and the flange portion 12 is substantially the center of the flange portion 12 in plan view. Further, an inclined surface portion 122 connected to the inside of the cylinder shaft portion 11 is formed in the opening portion 121 on the bottom surface side of the flange portion 12. The corners of the flange 12 where the upper surface and the outer peripheral side surface intersect each other are also chamfered.

The inclined surface portion 122 has a funnel shape in which the inner diameter expands outward (downward in the present embodiment) on the side opposite to the cylindrical shaft portion 11, and is formed over a predetermined axial length. Further, the slope portion 122 is provided with a gentle slope area 123 and a steep slope area 124, and the maximum inner diameter 130 of the outer edge 120 of the slope portion 122 is about 5 times the maximum inner diameter 131 of the cylinder shaft portion 11. It is set.

Of these, the gentle slope area 123 is formed in a region from the outer edge portion 120 of the slope portion 122 to the inner peripheral corner portion 128 in the axially intermediate portion, and is formed into a spherical surface convex toward the cylindrical shaft portion 11. Has been done.

The steep slope region 124 is formed in a region from the inner peripheral corner portion 128 to the inner end edge 127, has a conical surface shape that is convex toward the cylinder shaft portion 11, and has a steeper angle than the gentle slope region 123. Are formed (see FIGS. 1 and 3).

(Work)
The effect of the insert nut 1 will be described with reference to FIGS. 1 to 6 (particularly FIGS. 5 and 6).

<Mounting the insert nut 1 on the mounted member 2>
The insert nut 1 is inserted into the columnar hole 21 formed in the plate-shaped member 2 to be attached. Since the inner diameter of the hole 21 is formed to be slightly smaller than the outer diameter of the cylinder shaft portion 11, the cylinder shaft portion 11 inserted into the hole 21 is prevented by the locking structure portion 112. A locking force is generated between the insert nut 1 and the inner wall of the hole 21, so that the insert nut 1 can be prevented from dropping from the mounted member 2 and the cylindrical shaft portion 11 can be prevented from idling with respect to the inner wall of the hole 21.

Here, in the present embodiment, the hole 21 is provided with a spot facing portion 22 into which the flange portion 12 can be fitted on the front surface side, and the entire flange portion 12 can be fitted into the spot facing portion 22. There is.

That is, in the state where the insert nut 1 is inserted into the hole 21, the slope portion 122 of the bottom surface of the flange portion 12 is recessed inward from the surface 23 of the mounting member 2, so that the screw body is attached to the surface 23 of the mounted member 2. When the tip 30 of the screw body 3 is applied and slid, the tip 30 of the screw body 3 enters into the inclined surface portion 122.

Note that the holes formed in the mounted member 2 may be in a mode without the counterbore 22. In this case, by omitting the spot facing portion 22, the attached member can be easily processed, and since the flange portion 12 projects from the surface 23 of the attached member 2, the screw body 3 sliding on the surface 23 is formed. When the tip 30 comes close to the insertion position of the insert nut 1, the tip 30 contacts the outer peripheral edge of the flange portion 12, and the user can grasp the approximate position of the opening 121 by the feel of the hand received by this contact.

<Installation of the screw body 3 on the insert nut 1>
When the user reaches the insertion position of the insert nut 1 while sliding the tip 30 of the screw body 3 on the surface 23 of the mounted member 2, the tip 30 of the screw body 3 first enters the gentle slope area 123. ..

The gentle slope area 123 has a spherical surface convex toward the cylinder shaft portion 11 as described above and is more gently inclined than the steep slope area 124. Therefore, when a force is applied to the tip 30 of the screw body 3, While sliding on the gentle spherical surface of the slope area 123, the inclined state of the screw body 3 is corrected to some extent by the inclination correcting action, and the tip end 30 of the screw body 3 moves toward the cylinder shaft portion 11. Guided in the general direction.

Then, the tip 30 of the screw body 3 that has slid along such a gentle slope area 123 and has reached the side edge on the cylinder shaft portion 11 side, in the present embodiment, the inner peripheral corner portion 128, is dropped into the steep slope area 124. In this way, it is guided in the correct direction toward the cylinder shaft 11. In addition, while passing through the steep slope area 124, the inclination correcting action is further promoted, and the axial centers of the screw body 3 and the cylinder shaft portion 11 can be substantially aligned with each other.

In this way, the tip end 30 of the screw body 3 can be gradually directed toward the cylinder shaft portion 11 while passing from the gentle slope area 123 to the steep slope area 124, and can be surely slipped into the cylinder shaft portion 11. It can be done.

Further, in the work during this period, as shown in FIGS. 5 and 6, even when the insert nut 1 is attached to the rear surface side of the attached member 2, the position of the opening 121 is directly visually inspected. Without touching the tip end 30 of the screw body 3 against the slant surface portion 122 of the flange portion 12 using the outer edge 120 as a guide, and sliding the tip end 30 of the screw body 3 inside the cylindrical shaft portion 11 by groping. Since it can be reliably guided up to, the work of attaching the screw body 3 can be quickly performed with a low load.

In addition, in the beveled surface portion 122 of the present embodiment, the maximum inner diameter 130 of the outer end edge 120 is about 5 times the maximum inner diameter 131 of the cylinder shaft portion 11, so compared with the size of the maximum inner diameter of a normal screw hole, The size of the member to be mounted 2 is large enough to be found by direct groping without direct visual inspection, and the size is appropriate, the appearance is well organized, and the size does not interfere with other components of the member 2 to be mounted. Does not interfere with structural design.

In this way, the screw body 3 screwed into the cylindrical shaft portion 11 from the opening 121 is rotated in the screwing direction (generally, the clockwise direction) so that the screw body 3 has a male thread. The screw body 3 can be detachably attached to the insert nut 1 by being screwed with the female screw 111 in the cylindrical shaft portion 11.

The insert nut 1 may be mounted not only on the back surface side of the mounted member 2 but also on the front surface side of the mounted member 2 or the like which is directly visible. In this case, it is possible to use it as a universal design, which is suitable for elderly elderly people who have difficulty in handling.

[Modification 1, Modification 2, Modification 3]
The insert nuts 1a, 1b, 1c shown in FIG. 7 are modified examples of the shape of the flange portion 12 of the insert nut 1 shown in FIG.

(Modification 1: Insert nut 1a)
The insert nut 1a has a triangular outer shape in the axial direction of the flange portion 12a, and the slope portion 122a has a gentle slope area 123a formed of a funnel-shaped triangular pyramid surface having the axial center of the cylinder shaft portion 11 as its apex. And a steep slope area 124a formed in a conical shape like the steep slope area 124 described above. Since the cylindrical shaft portion 11 has the same structure as the insert nut 1, the description thereof will be omitted.

As a result, the insert nut 1a exerts a decorative effect different from that of the insert nut 1, and in addition, for example, a triangular counterbore portion in which the flange portion 12a is just fitted is provided around the hole formed in the mounted member 2. In the case where the flange portion 12a is engaged with the corner portion of the counterbore portion, the disc-shaped flange portion 12 is inserted into the columnar hole 21. It is possible to reliably prevent the cylindrical shaft portion 11 from idling. In addition, since the other effects of the insert nut 1a are substantially the same as the structure of the insert nut 1,
The description is omitted.

(Modification 2: Insert nut 1b)
The insert nut 1b has a quadrangular outer shape of the flange portion 12b as viewed in the axial direction, and the slant surface portion 122b is a gentle slant surface area 123b including a funnel-shaped quadrangular pyramid surface having the axial center of the cylindrical shaft portion 11 as its apex. And a steep slope area 124b formed in a conical shape like the steep slope area 124 described above. Since the cylindrical shaft portion 11 has the same structure as the insert nut 1, the description thereof will be omitted.

As a result, the insert nut 1b has a decorative effect different from that of the insert nut 1 and the like, and in addition, for example, around the hole formed in the mounted member 2, a square counterbore portion in which the flange portion 12b is just fitted is provided. In this case, the corner of the flange 12b engages with the corner of the counterbore to insert the disc-shaped flange 12 into the columnar hole 21. It is possible to reliably prevent the cylindrical shaft portion 11 from idling. It should be noted that the other operation effects of the insert nut 1b are substantially the same as the structure of the insert nut 1 and the like, and thus the description thereof will be omitted.

(Modification 3: Insert nut 1c)
The insert nut 1c has a hexagonal outer shape as viewed in the axial direction of the flange portion 12c, and the slant surface portion 122c has a gentle slanted surface region including a funnel-shaped hexagonal pyramid surface having the axial center of the tubular shaft portion 11 as its apex. 123c and a steep slope area 124c formed in a conical shape like the steep slope area 124 described above. Since the cylindrical shaft portion 11 has the same structure as the insert nut 1, the description thereof will be omitted.

As a result, the insert nut 1c exerts a decorative effect different from that of the insert nut 1 and the like, and in addition, for example, a hexagonal counterbore portion in which the flange portion 12c is just fitted is provided around the hole formed in the mounted member 2. In the case where the disc-shaped flange portion 12c is inserted into the columnar hole 21, the corner portion of the flange portion 12c engages with the corner portion of the counterbore portion. On the other hand, it is possible to reliably prevent the cylindrical shaft portion 11 from idling. It should be noted that the other operation effects of the insert nut 1c are substantially the same as the structure of the insert nut 1 and the like, and thus the description thereof will be omitted.

[Second Embodiment]
Next, the insert nut 1d shown in FIG. 8 is another embodiment of the insert nut 1 shown in FIG. The insert nut 1d is different from the insert nut 1 shown in FIG. 1 and the like only in the shape of the flange portion, and the cylindrical shaft portion 11 has the same structure as the insert nut 1 and therefore the description thereof is omitted.

In the flange portion 12d of the insert nut 1d, a first gentle slope 125 and a second gentle slope 126 are provided in a gentle slope area 123d provided in the slope 122d. Of these, the first gentle slope 125 is connected to the outer edge 120d of the slope 122d, and is provided at an angle such that the tip 30 of the screw body 3 can be easily introduced into the slope 122d. Specifically, by providing the first gentle slope 125 having a larger inclination angle than the second gentle slope 126, the head between the outer edge 120d of the slope 122d and the second gentle slope 126 is set to be large.

Thereby, the user confirms that the tip 30 of the screw body 3 has entered the gentle slope area 123d from the outer area of the outer end edge 120d of the slope portion 122d by the feel of the hand received from this drop. The tip 30 of the body 3 can be surely put in the slope 122d, and then the second gentle slope 126 having a smaller inclination angle than the first gentle slope 125 can be slid more gently. The tip end 30 of the screw body 3 can be guided into the cylindrical shaft portion 11 with higher accuracy.

[Third Embodiment]
The screw receiving structure 4 for the mounted member shown in FIGS. 9 and 10 is another embodiment to which the technical idea of the present invention is applied.

The screw receiving structure 4 of the mounted member includes a mounted member 40, a female screw portion 41 formed on the mounted member 40, and a guide portion that slides the tip 30 of the screw body 3 into the female screw portion 41. And 42. Each part will be described in detail below. In the description, the “back surface” of the mounted member 40 is used to mean the downward surface in FIGS. 9 and 10.

The mounted member 40 is a wooden plywood. The attached member 40 is not limited to this, and may be, for example, a synthetic resin plate or the like.

The female screw portion 41 is configured by inserting a cylindrical insert nut 410 into a hole 401 formed in the mounted member 40. The insert nut 410 has a female screw 411 formed on the inner wall thereof and a locking structure 412 provided on the outer peripheral surface thereof.

Further, an inclined surface portion 420 connected to the inside of the female screw portion 41 is formed in the opening portion 421 on the back surface 402 side of the mounted member 40.

The inclined surface portion 420 has a funnel shape whose inner diameter increases outward (downward in this embodiment) on the side opposite to the female screw portion 41, and is formed over a predetermined axial length. Further, the slope portion 420 is provided with a gentle slope area 423 and a steep slope area 424, and the maximum inner diameter 430 of the outer edge 422 of the slope portion 420 is set to about 5 times the maximum inner diameter 431 of the insert nut 410. Has been done.

Of these, the gentle slope area 423 is formed in the area from the outer edge portion 422 of the slope portion 420 to the inner peripheral corner portion 428 in the middle in the axial direction, and is formed into a spherical surface convex toward the female screw portion 41. Has been done.

The steep slope area 424 is formed in a region from the inner peripheral corner portion 428 to the inner end edge 425, has a conical surface shape convex toward the female screw portion 41, and has a steeper angle than the gentle slope surface area 423. Is formed (see FIGS. 9 and 10).

(Work)
The operation and effect of the screw receiving structure 4 of the mounted member 40 will be described with reference to FIGS. 9 and 10.
When the tip 30 of the screw body 3 is applied to the back surface 402 and slid to reach the region where the guide portion 42 is provided, the tip 30 of the screw body 3 first enters the gentle slope area 423.

The gentle slope area 423 has the same spherical shape as the gentle slope area 123 described above and is more gently inclined than the steep slope area 424. Therefore, when a force is applied to the tip 30 of the screw body 3, the gentle slope area 423 is formed. While passing along the gradual spherical surface of 423, the inclination state of the screw body 3 is corrected to some extent by the inclination correcting action, and the tip end 30 of the screw body 3 moves in a general direction toward the female screw portion 41. Be guided.

Then, the tip end 30 of the screw body 3 that has slid along such a gentle slope area 423 and has reached the side edge on the female screw portion 41 side, in the present embodiment, the inner peripheral corner portion 428, is dropped into the steep slope area 424. In this way, it is guided in the correct direction toward the female screw portion 41. In addition, while passing through the steep slope area 424, the inclination correcting action is further promoted, and the axial centers of the screw body 3 and the insert nut 410 can be substantially aligned with each other.

In this way, as in the case of the insert nut 1 described above, the tip 30 of the screw body 3 can be gradually directed toward the female screw portion 41 while passing from the gentle slope area 423 to the steep slope area 424. It can be surely slid into the female screw portion 41.

Further, in the work during this period, the front end 30 of the screw body 3 is slid by applying the outer end edge 422 to the slanted surface portion 420 as a guide without directly observing the position of the opening portion 421, and is groped. Since the tip end 30 of the screw body 3 can be reliably guided into the female screw portion 41, the mounting work of the screw body 3 can be performed quickly and easily.

In addition, in the slope portion 420 of the guide portion 42 of the present embodiment, the maximum inner diameter 430 of the outer edge 422 is about 5 times the maximum inner diameter 431 of the insert nut 410, so Compared with the size, it is a size that can be found by hand groping without direct visual inspection, the size is appropriate, the appearance is well organized, and the size does not interfere with other components such as the mounted member 40. It does not hinder the structural design of the mounted member 40.

In this way, the screw body 3 screwed into the insert nut 410 from the opening 421 is rotated in the screwing direction so that the male screw of the screw body 3 and the female screw 411 of the insert nut 410 are screwed together. In this case, the screw body 3 can be detachably attached to the insert nut 410 of the attached member 40.

It should be noted that the insert nut 410 may be attached not only on the back surface side of the mounted member 40, but also on the front surface side of the mounted member 40 or the like where it can be seen directly. In this case, it can be used as a universal design.

[Modification 4]
The screw receiving structure 4a of the mounted member shown in FIG. 11 is a modification of the shape of the female screw portion 41 of the screw receiving structure 4 of the mounted member shown in FIGS. 9 and 10.

The screw receiving structure 4a of the mounted member includes a mounted member 40a made of synthetic resin, a female screw portion 41a formed on the mounted member 40a, and a tip of the screw body 3 slidable to reach the inside of the female screw portion 41a. And a guide portion 42 for guiding. The portions other than the female screw portion 41a have the same structure as the screw receiving structure 4 of the mounted member, and thus the description thereof will be omitted.

In the screw receiving structure 4a, since the female screw portion 41a is formed by directly engraving the female screw 411 in the hole 401a of the mounted member 40a, it is unnecessary to procure the insert nut 410 and insert and fix the work described above. Therefore, the structure of the female screw portion 41a can be simplified. As a result, in addition to the above-described function and effect of the screw receiving structure 4 for the mounted member, it is possible to improve the work efficiency when the screw receiving structure 4a for the mounted member is provided on the mounted member 40a and suppress the manufacturing cost.

As described above, the insert nut to which the present invention is applied and the screw receiving structure of the mounted member can be easily slid without directly observing the opening of the screw hole when the screw body is screwed into the screw hole. It is possible to quickly and accurately guide the tip of the screw body to the inside of the opening with a low load only by a dynamic operation.

The terms and expressions used in the present specification and the claims for utility model registration are for explanation purposes only, and are not limiting in any way. There is no intention to exclude terms or expressions that are equivalent to the features described or parts thereof. Needless to say, various modifications are possible within the scope of the technical idea of the present invention.

1, 1a, 1b, 1c, 1d Insert nut 11 Cylindrical shaft portion 111 Female screw 112 Locking structure portion 12, 12a, 12b, 12c, 12d Flange portion 120, 120a, 120b, 120c, 120d Outer edge 121 Opening 122 , 122a, 122b, 122c, 122d slope portion 123, 123a, 123b, 123c, 123d gentle slope area 124, 124a, 124b, 124c, 124d steep slope area 125 first gentle slope 126 second gentle slope 127 inner end edge 128 inner circumference Corner part 130 Maximum inner diameter between outer end edges 131 Maximum inner diameter of cylinder shaft part 2 Attached member 21 Hole 22 Counterbore part 23 Attached member surface 3 Screw body 30 Tip 4, 4a Screw receiving structure of attached member 40, 40a Attached member 401, 401a Hole 402 Backside surface 403 Outer edge 41, 41a Female screw portion 410 Insert nut 411 Female screw 412 Locking structure portion 42 Guide portion 420 Slope portion 421 Opening portion 422 Outer edge 423 Slow slope area 424 Steep slope area 425 Inner edge 428 Inner corner 430 Maximum inner diameter between outer edges 431 Maximum inner diameter of insert nut 9 Insert nut 91 Cylindrical shaft portion 911 Female screw 912 Opening 912a Inner edge 912b Outer edge 92 Flange section 921 surface 93 locking portion 931 retaining protrusion 99 object to be attached 991 surface

Claims (8)

A cylinder shaft part with an internal thread engraved on the inner wall,
When viewed in the axial direction from the cylinder shaft portion, the external shape is a circular or rectangular plate shape, and the base of the cylinder shaft portion is formed so that the axis of the cylinder shaft portion is orthogonal to the flat upper surface portion. With a flange portion to which the end side is fixed,
The flange portion is
A funnel-shaped slope portion, which is connected to the inside of the cylindrical shaft portion and whose inner diameter expands outward on the side opposite to the cylindrical shaft portion, is formed over a predetermined axial length on the back side of the upper surface portion. In the portion, by sliding the tip of a screw body engraved with a male screw, and having a bottom portion that guides the tip into the cylindrical shaft portion,
Formed into a size capable of being fitted into a counterbore portion provided on a peripheral edge of an insertion hole of the cylindrical shaft portion formed on the mounted member,
The slope portion is
The maximum inner diameter of the outer edge is set to 3 times or more and 10 times or less of the maximum inner diameter of the cylinder shaft portion,
At least a portion is formed in a spherical surface convex toward the cylindrical shaft portion,
A gentle slope area formed in an area from the outer edge of the slope portion to the intermediate portion in the axial direction, and a gentle slope area formed in the area of the slope portion from the intermediate portion in the axial direction to the inner edge, A steep slope area with a large inclination angle is also provided,
In the gentle slope area, a first gentle slope that is connected to an outer edge of the slope section and introduces the tip of the screw body into the slope section, and an inclination angle smaller than that of the first gentle slope are formed. An insert nut provided with a second gentle slope that gently moves the tip of the screw body to a steep slope area. A cylinder shaft part with an internal thread engraved on the inner wall,
When viewed in the axial direction from the cylinder shaft portion, the external shape is a circular or rectangular plate shape, and the base of the cylinder shaft portion is formed so that the axis of the cylinder shaft portion is orthogonal to the flat upper surface portion. With a flange portion to which the end side is fixed,
The flange portion has a funnel-shaped inclined surface portion, which is connected to the inside of the cylindrical shaft portion and whose inner diameter expands outward on the opposite side of the cylindrical shaft portion, over a predetermined axial length on the back side of the upper surface portion. And a bottom surface portion that guides the tip into the cylindrical shaft portion by sliding the tip of a screw body in which a male screw is engraved on the inclined surface portion,
At least a portion of the inclined surface portion is formed into a spherical surface convex toward the cylindrical shaft portion. On the slope,
A gentle slope area formed in the area from the outer edge to the middle portion in the axial direction of the slope portion;
The insert nut according to claim 2, wherein the insert nut is formed in a region from an intermediate portion in the axial direction to the inner end edge of the slope portion and has a steep slope area having a larger inclination angle than the gentle slope area. In the gentle slope area,
A first gentle slope that is connected to the outer edge of the slope and introduces the tip of the screw body into the slope.
The insert nut according to claim 3, further comprising: a second gentle slope that is formed to have a smaller inclination angle than the first gentle slope and that gently moves the tip of the screw body to a steep slope area. The maximum inner diameter of the outer edge of the slope portion,
The insert nut according to claim 2, 3 or 4, which is set to 3 times or more and 10 times or less of a maximum inner diameter of the cylindrical shaft portion. The said flange part is formed in the size which can be fitted in the counterbore part provided in the periphery of the insertion hole of the said cylinder shaft part formed in the to-be-attached member. Alternatively, the insert nut according to claim 5. A cylindrical shaft portion having an internal thread engraved on the inner wall and a hollow disk or square plate shape in a plan view, and the base end side of the cylindrical shaft portion is formed so that the axis of the cylindrical shaft portion is orthogonal to each other. A fixed flat upper surface portion, and a funnel-shaped inclined surface portion that is located opposite to the upper surface, is connected to the inside of the cylinder shaft portion, and has an inner diameter that expands outward toward the side opposite to the cylinder shaft portion, A flange portion including a bottom surface portion that has a predetermined axial length and slides the tip of a screw body having a male screw engraved on the inclined surface portion to guide the tip into the cylindrical shaft portion. Having, the slope portion, at least a part, is formed in a spherical surface convex toward the cylindrical shaft portion, and an insert nut,
A surface to which the insert nut is attached, and a member to be attached, which is formed on the surface and has a diameter slightly smaller than the outer shape of the cylinder shaft portion and which has a hole into which the cylinder shaft portion is inserted;
The screw receiving structure for the mounted member. The attached member has a spot facing portion formed on the surface and the periphery of the hole.
The screw receiving structure for the mounted member according to claim 7, wherein the insert nut is provided with a size such that the entire flange portion can be fitted into the counterbore portion.