JP2018159459A - Insert nut and screw receiving structure of member to be attached - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insert nut capable of quickly and accurately guiding a tip of a screw body into an opening at low load only with simple slide operation, without directly watching the opening of a screw hole, upon screwing the screw body into the screw hole, and a screw receiving structure of a member to be attached.SOLUTION: An insert nut 1 includes: a cylinder shaft part 11 on an inner wall of which a female screw 111 is ditched; and a flange part 12 that has a funnel-like slope part 122 over a predetermined axial length, the slope part connected to the inside of the cylinder shaft part 11 and whose inner diameter gradually extends outward on an opposite side to the cylinder axis shaft 11, and whose tip 30 is guided into the cylinder shaft part 11 by sliding, on the slope part 122, the tip 30 of a screw body 3 on which a male screw is ditched. At least a part of the slope part 122 is formed into a spherical shape projecting toward the cylinder shaft part 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an insert nut and a screw receiving structure for a member to be attached. Specifically, when screw parts (hereinafter referred to as “screw bodies”) in which a male thread is engraved on part or all of the shaft portion, such as bolts, are screwed into the screw holes, the openings of the screw holes The present invention relates to an insert nut and a screw receiving structure for a member to be attached, which can guide the tip of a screw body to an opening portion quickly and accurately with a simple sliding operation without directly viewing.

  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 and fixed to a screw hole formed in the nut. In particular, it is widely used in the field of woodwork furniture, and as such a nut, an insert nut as described in Patent Document 1 has been proposed. The structure of this insert nut is shown in FIG.

  The insert nut 9 shown in FIG. 12 is formed at a cylindrical shaft portion 91 in which a female screw 911 is engraved on a part of an inner peripheral surface to form a screw hole, and at one end portion of the cylindrical shaft portion 91, and has a surface 921. Is a disc-shaped flange portion 92 that is flush with the surface 991 of the adherend 99 and a tube made of synthetic resin attached to the cylindrical shaft portion 91, and is separate from the cylindrical shaft portion 91 and the flange portion 92. And a locking portion 93 provided with a plurality of retaining projections 931 on the surface portion.

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

JP 2010-7771 A

  By the way, in the insert nut 9 described above, an opening portion 912 of a screw hole is formed at the approximate center in the plan view of the flange portion 92. In this opening portion 912, an edge portion of an inner end (hereinafter referred to as the inner shaft portion 91) is connected. , 912a and an outer edge portion (hereinafter referred to as “outer edge”) 912b that is opened outward 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 portion 912 is also small. Therefore, coupled with the flush structure of the flange portion 92, it is difficult to grasp the position of the opening portion 912 by hand. In order to screw the screw body into the portion 912, it is necessary to accurately grasp the position of the opening 912 by visual observation. In particular, when the insert nut 9 is disposed at a position where it cannot be directly seen, such as the back surface of the plate material that is lower than the user's eye level, the user may sink into the lower side of the plate material to open the opening. It is necessary to visually grasp the position of 912, which takes time and leads to a reduction in work efficiency and an increase in work load of the screw body mounting work.

  Further, the back side, which is an invisible part, is often not subjected to end face processing such as deburring or chamfering, and there is a risk of hurting hands by burrs or sharp parts during groping.

  In addition, whether the tip of the screw body cannot be accurately guided into the opening 912, whether the mounting operation is performed visually or by hand, the screw body is greatly misaligned with respect to the axis of the cylindrical shaft portion 91. May be inserted into the opening 912 in a state, and each screw thread may be damaged due to excessive 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 cylindrical shaft portion is insufficient. And may fall off during use.

  The present invention has been devised in view of the above points. When the screw body is screwed into the screw hole, the screw body can be screwed by a simple sliding operation without directly viewing the opening of the screw hole. It is an object of the present invention to provide an insert nut capable of guiding a tip of a body into an opening quickly and accurately with a low load, and a screw receiving structure for a member to be attached.

  In order to achieve the above object, the insert nut of the present invention has a cylindrical shaft portion in which an internal thread is engraved on the inner wall, an inner diameter that is connected to the inside of the cylindrical shaft portion and outwards on the opposite side of the cylindrical shaft portion. A flange having a funnel-shaped inclined surface extending over a predetermined length in the axial direction, and sliding the tip of a screw body in which a male screw is engraved on the inclined surface to guide the tip into the cylindrical shaft A part.

  The insert nut is provided with the above-described cylindrical shaft portion, so that the screw body inserted through the slope portion formed in the flange portion is screwed into the male screw on the outer peripheral surface and the female screw in the cylindrical shaft portion. And can be detachably attached to the insert nut. The mounting configuration 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 cylindrical 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, thereby causing the insert nut to fall off the mounted member. Or the cylindrical shaft portion can be prevented from idling with respect to the inner wall of the hole.

  As this “locking structure”, for example, a mode in which a plurality of hardly deformable projections are provided, a plurality of projections that are elastically deformed, and the outer contour line of the tip of the projection is set larger than the inner diameter line of the hole of the attached member When the cylindrical shaft portion is inserted into the hole to be inserted, the locking structure is rubbed with the inner wall of the hole, as in the case where the proximal end side is larger in diameter than the distal end side. The structure is not particularly limited as long as it can prevent the cylindrical shaft from slipping with respect to the inner wall of the hole by generating a locking force such as a force, and therefore can be locked in the hole by insertion or the like. If so, the outer peripheral surface of the cylindrical shaft portion may have a straight cylindrical shape that does not particularly provide the locking structure portion.

  Further, the slope portion has a funnel-like slope portion extending in a predetermined axial direction along the flange portion, which is connected to the inside of the tubular shaft portion and whose inner diameter increases toward the outer side opposite to the tubular shaft portion. It is possible to secure a sliding surface having a size large enough to run the tip of the screw body between the outer end edge and the inner end 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 cylindrical shaft portion or being locked to a portion whose diameter has been enlarged in the middle of the sliding surface. The tip of the screw body can be accurately guided by sliding smoothly on the slope portion toward the inside of the cylindrical shaft portion.

  In addition, in the flange portion, the user grips the screw body by guiding the tip to the inside of the cylindrical shaft portion by sliding the tip of the screw body engraved with the male screw on the slope portion, Slide the tip of the screw body into the aforementioned sliding surface using the outer edge of the slope as a guide, and then slide the tip of the screw body through the inner edge of the slope into the cylinder shaft. Can lead to sure.

  With the configuration as described above, when the screw body is screwed into the screw hole of the insert nut attached to the member to be attached, there is no need to visually check the position of the opening of the insert nut, and the screw body is attached. Efficiency can be improved and workload can be reduced. Furthermore, even when groping, it is possible to prevent the user's hand from directly contacting the back side of the member to which the insert nut is attached, and there is no risk of hurting the hand with burrs or sharp parts. In addition, the tip of the screw body can be gradually moved accurately into the cylindrical shaft portion so as to be along the aforementioned sliding surface, and the misalignment of the screw body with respect to the axial center of the cylindrical shaft portion can be suppressed, It is possible to reliably prevent screw threads from being damaged and the screw body from falling off during use.

  A “slope” is a shape in which the inner diameter gradually increases from the inner edge toward the outer edge, or conversely, a shape in which the inner diameter gradually decreases from the outer edge to the inner edge. If it is, it will not specifically limit, for example, the shape of a slope part may be a spherical shape convex toward the cylinder axis part side, as will be described later, or one end of the cylinder axis part on the slope part side. It may be a pyramidal surface with the head apex. And the above-mentioned sliding surface of sufficient size is formed from the outer end edge to the inner end edge on the inner surface of the slope portion having such a shape so that the front end of the screw body can be along.

  Further, when at least a part of the inclined surface portion is formed in a spherical shape convex toward the cylindrical shaft portion, the screw body entering the inclined surface portion is in a state of being inclined with respect to the axial center of the cylindrical shaft portion. However, the inclination state is corrected to some extent while passing through the spherical area of the inclined surface portion (hereinafter referred to as “inclination correcting action”), and the screw body can be smoothly screwed into the screw hole. In addition, the part formed in the convex spherical shape by the slope part may be a partial area of the slope part, or the whole area.

  In addition, the slope portion is formed in an area from the outer edge of the slope portion to the middle portion in the axial direction, and in a region from the middle portion in the axial direction to the inner edge of the slope portion. 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 initially enters the gentle slope area and slides gently, The tip of the screw body that has been guided in the general direction toward the part and then slid on the gentle slope area and reached the side edge on the cylindrical shaft side is suddenly dropped into the steep slope area, Guided in the exact direction towards.

  Thereby, while passing the front-end | tip of a screw body from a gentle slope area to a steep slope area, it can orient | assign to the direction of a cylinder shaft part gradually, and can guide | invade with a sufficient precision further into the cylinder axis part. In addition, while passing through the steep slope region, the above-described inclination correction action is further promoted, and the axial center of the screw body and the cylindrical shaft portion can be substantially matched. The screwed state between the female screws can be reliably normalized, and the screw body can be screwed more smoothly into the screw hole.

  In addition to the gentle slope area and the steep slope area, the slope part is composed of a three-stage structure including a slope having an intermediate angle between the gentle slope area and the steep slope area, as described later, or a multi-stage structure of four or more stages. It may be.

  Further, a first gentle slope connected to the outer edge of the slope portion and introducing the tip of the screw body into the slope portion is formed in the gentle slope area, and an inclination angle is smaller than the first gentle slope, and the tip of the screw body When a second gentle slope is provided that gently moves the slope to the steep slope area, 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. With this drop as a guide, the user can securely insert the tip of the screw body into the slope from the outer edge, 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 edge of the slope portion is set to be not less than 3 times and not more than 10 times 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-like slope portion. .

  Specifically, if the maximum inner diameter of the outer edge of the slope portion is less than three times the maximum inner diameter of the cylindrical shaft portion, the slope portion is the same size as a normal screw hole. Since it becomes difficult to put the end of the screw body into the sliding surface with the end edge as a guideline, it is not easy to reach the end of the screw body to the cylindrical shaft portion. On the other hand, if the maximum inner diameter of the outer edge of the slope portion exceeds 10 times the maximum inner diameter of the cylindrical shaft portion, the curvature and inclination angle are large enough to smoothly guide the tip of the screw body to the cylindrical shaft portion. It is necessary to increase the thickness of the flange part remarkably, and such a thick and large insert nut looks bad and easily interferes with other components of the mounted member. The insert nut is not preferable because it may hinder the structural design of the instrument used.

  In order to achieve the above-described object, the screw receiving structure for a member to be attached according to the present invention is connected to the female screw part provided on the member to be attached to which the screw body engraved with the male screw is attached, and the female screw part. A funnel-shaped slope having an inner diameter that expands toward the outer side opposite to the female thread, has a predetermined axial length. By sliding the tip of the screw body on the slope, the tip And a guide portion that guides the inside of the female screw portion.

  Then, the screw receiving structure of the attached member includes the above-described female screw portion, so that the screw body inserted through the slope portion formed in the guide portion has a male screw and a female screw portion on the outer peripheral surface thereof. The female screw can be screwed and attached to the attached member in a detachable manner.

  Furthermore, the guide portion has a funnel-shaped slope portion that is connected to the inside of the female screw portion and has an inner diameter that increases toward the outer side opposite to the female screw portion. It is possible to secure a sliding surface having a size large enough to run the tip of the screw body between the outer end edge and the inner end 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 to a portion whose diameter has been enlarged in the middle of the sliding surface. The tip of the screw body can be accurately guided by sliding smoothly on the slope portion toward the inside of the female screw portion.

  In addition, in the guide portion, the user grips the screw body by sliding the tip of the screw body on the slope portion and guiding the tip into the female screw portion, and the tip of the slope portion is The tip of the screw body can be surely guided into the female screw portion through the inner end edge of the inclined surface portion by sliding it by putting it in the aforementioned sliding surface with the outer end edge as a guide and sliding it. .

  With the configuration as described above, when the screw body is screwed into the screw hole of the female screw portion, there is no need to visually confirm the position of the opening portion of the screw hole, and the work efficiency of the screw body mounting work can be improved and The load can be reduced. Furthermore, even when groping, the user's hand can be prevented from coming into direct contact with the back side of the mounted member provided with the screw receiving structure, and there is no risk of hurting the hand with burrs or sharp parts. . In addition, the tip of the screw body can be gradually moved to the inside of the female screw portion so as to be along the aforementioned sliding surface, and the misalignment of the screw body with respect to the axial center of the female screw portion can be suppressed. It is possible to reliably prevent screw threads from being damaged and the screw body from falling off during use.

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

  Further, when the female screw portion is formed by directly engraving the female screw in a predetermined hole of the attached member, the above-described procurement and insertion and fixing work of the cylindrical body engraved with the female screw are performed. It becomes unnecessary, and the configuration of the female screw portion can be simplified. When the member to be attached is a synthetic resin or the like, a female screw can be engraved in the hole using a tap or the like.

  The screw nut structure of the insert nut and the member to be attached according to the present invention is a screw body that is simply sliding operation without directly viewing the opening of the screw hole when the screw body is screwed into the screw hole. The tip can be quickly and accurately guided to the inside of the opening with a low load.

It is the perspective view which showed 1st Embodiment of this invention and looked at the insert nut from the bottom face side. It is a side view of the insert nut shown in FIG. It is AA arrow sectional drawing of FIG. It is a bottom view of the insert nut shown in FIG. FIG. 2 is a longitudinal sectional view illustrating a state in which an opening is searched for by a tip of a bolt in a member to which the insert nut illustrated in FIG. 1 is inserted. It is a longitudinal cross-sectional view explanatory drawing which shows the state in which the volt | bolt was screwed 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. The 2nd Embodiment of the present invention is shown and it is a longitudinal section of an insert nut. It is perspective explanatory drawing which showed 3rd Embodiment of this invention and looked at the screw receiving structure of the to-be-attached member from the bottom face side. FIG. 10 is a longitudinal sectional view illustrating a state in which the opening is searched for by the tip of the bolt in the screw receiving structure of the mounted member illustrated in FIG. 9. It is a longitudinal cross-sectional view which shows the modification 4 which is a modification of the screw receiving structure of the to-be-attached member of this invention. The insert nut of patent document 1 is shown, (a) is a front view, (b) is a longitudinal cross-sectional schematic diagram, (c) is the longitudinal section of the state which inserted the insert nut in the hole formed in the board | plate material of a to-be-attached thing. FIG.

  The embodiment of the present invention will be described in more detail with reference to FIGS. In addition, the code | symbol in each figure is attached | subjected within the range which reduces complexity and makes it easy to understand.

[First Embodiment]
The insert nut 1 will be described with reference to FIGS.
The insert nut 1 is made of synthetic resin and includes a cylindrical shaft portion 11 and a flange portion 12 and is integrally formed. 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 cylindrical shaft portion 11 is fixed, and is used to mean the upward surface of FIGS. 1 to 3. Is a surface located on the “opposite side to the cylindrical shaft portion” described above, and is used to mean a downward surface of FIGS. 1 to 3.

  The cylindrical shaft portion 11 is a cylindrical body having both ends open, a distal end side is a free end, and a proximal end side is fixed to the flange portion 12, and a 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 this Embodiment, although the latching structure part 112 is what is called a bamboo shoot shape with an unevenness | corrugation in a longitudinal direction, it is not limited to this, As mentioned above, the latching structure part of various aspects is included. It can be adopted.

  The flange portion 12 has a hollow disk shape in a plan view, and the base end side of the tube shaft portion 11 is fixed to the flat upper surface thereof so as to be orthogonal to the axis of the tube shaft portion 11 (see FIG. 2). ), The fixing position of the base end side of the cylindrical shaft portion 11 and the flange portion 12 is substantially the center in a plan view of the flange portion 12. Furthermore, an inclined surface portion 122 connected to the inside of the cylindrical shaft portion 11 is formed in the opening portion 121 on the bottom surface side of the flange portion 12. A chamfering process is also applied to the corner portion of the flange portion 12 where the upper surface and the outer peripheral side surface intersect.

  The inclined surface portion 122 has a funnel shape in which an inner diameter increases toward an outer side (downward in the present embodiment) 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 region 123 and a steep slope region 124, and the maximum inner diameter 130 of the outer edge 120 of the slope portion 122 is about five times the maximum inner diameter 131 of the cylindrical shaft portion 11. Is set.

  Of these, the gentle slope region 123 is formed in a region from the outer edge 120 in the slope portion 122 to the inner peripheral corner portion 128 in the middle in the axial direction, and is formed in a convex spherical shape toward the cylindrical shaft portion 11. Has been.

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

(Work)
With reference to FIG. 1 thru | or FIG. 6 (especially FIG. 5, FIG. 6), the effect of the insert nut 1 is demonstrated.

<Attaching the Insert Nut 1 to the Mounted Member 2>
The insert nut 1 is inserted into a columnar hole 21 formed in the plate-shaped attached member 2. Since the inner diameter of the hole 21 is slightly smaller than the outer diameter of the cylindrical shaft portion 11, the cylindrical shaft portion 11 inserted into the hole 21 is held by the aforementioned locking structure portion 112. A locking force is generated between the inner wall of the hole 21, and the insert nut 1 can be prevented from falling off 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 counterbore portion 22 into which the flange portion 12 can be fitted on the surface side, and the entire flange portion 12 can be fitted into the counterbore portion 22. Yes.

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

  Note that the hole formed in the attached member 2 may be an embodiment without the spot facing portion 22. In this case, the omission of the counterbore portion 22 facilitates the processing of the attached member, and the flange portion 12 protrudes from the surface 23 of the attached member 2, so the screw body 3 sliding on the surface 23. When the tip 30 of the insert nut 1 comes close to the insertion position of the insert nut 1, it comes into contact with the outer peripheral side edge of the flange portion 12, and the user can grasp the approximate position of the opening 121 by the hand feeling received by this contact.

<Attaching the screw body 3 to the insert nut 1>
If the user reaches the insertion position of the insert nut 1 while the user slides 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 region 123. .

  As described above, the gentle slope area 123 is a spherical surface convex toward the cylindrical shaft portion 11 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 passing through a gentle spherical surface of the slope region 123, the inclined state of the screw body 3 is corrected to some extent by the inclination correcting action, and the tip 30 of the screw body 3 is directed toward the cylindrical shaft portion 11. Guided in the general direction.

  The tip 30 of the screw body 3 that slides on the gentle slope region 123 and reaches the side edge on the cylindrical shaft portion 11 side, in this embodiment, the inner peripheral corner portion 128 is dropped into the steep slope region 124. In this way, it is guided in an accurate direction toward the cylindrical shaft portion 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 cylindrical shaft portion 11 can be made substantially coincident.

  In this way, the tip 30 of the screw body 3 can be gradually directed in the direction of the cylindrical shaft portion 11 while passing from the gentle slope region 123 to the steep slope region 124, and reliably slips into the cylindrical shaft portion 11. Can be made.

  Further, as shown in FIGS. 5 and 6, the operation during this time is performed by directly observing the position of the opening 121 even when the insert nut 1 is attached to the back side of the attached member 2. Instead, the tip 30 of the screw body 3 is slid against the inclined surface portion 122 of the flange portion 12 with the outer edge 120 as a guide, and the tip 30 of the screw body 3 is moved into the cylinder shaft portion 11 by groping. Therefore, the screw body 3 can be quickly attached with a low load.

  In addition, in the slope portion 122 of the present embodiment, the maximum inner diameter 130 of the outer edge 120 is about five times the maximum inner diameter 131 of the cylindrical shaft portion 11, so compared with the size of the maximum inner diameter of a normal screw hole, It is a size that can be found by hand search without direct visual inspection, is suitable in size, has a good appearance, and does not interfere with other components of the mounted member 2. 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 male screw of the screw body 3 The female screw 111 in the cylindrical shaft portion 11 is screwed and the screw body 3 can be detachably attached to the insert nut 1.

  Note that the insert nut 1 may be attached not only at a location such as the back surface side of the attached member 2 but also at a directly visible location such as the surface side of the attached member 2. In this case, it can be used as a universal design that can be suitably used by elderly people who are handicapped.

[Modification 1, Modification 2, Modification 3]
Insert nuts 1a, 1b, and 1c shown in FIG. 7 are modifications 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 inclined surface portion 122a is a gentle inclined surface region 123a composed of a funnel-shaped triangular pyramid surface having the axial center of the cylindrical shaft portion 11 as a head vertex. And a steep slope area 124a formed in a conical surface like the steep slope area 124 described above. In addition, about the cylinder shaft part 11, since it is the same structure as the insert nut 1, description is abbreviate | omitted.

  As a result, the insert nut 1a has a decorative effect different from that of the insert nut 1. In addition, for example, a triangular counterbore portion in which the flange portion 12a just fits is provided around the hole formed in the attached member 2. When 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 as compared with the inner wall of the hole. It is possible to reliably prevent the cylindrical shaft portion 11 from idling. In addition, since the effect of the other insert nut 1a is a structure substantially the same as the insert nut 1, description is abbreviate | omitted.

(Modification 2: Insert nut 1b)
The insert nut 1b has a quadrangular outer shape in the axial direction of the flange portion 12b, and the inclined surface portion 122b is a gentle inclined surface region 123b composed of a funnel-shaped quadrangular pyramid surface having the axial center of the cylindrical shaft portion 11 as a head vertex. And a steep slope area 124b formed in a conical shape like the steep slope area 124 described above. In addition, about the cylinder shaft part 11, since it is the same structure as the insert nut 1, description is abbreviate | omitted.

  As a result, the insert nut 1b has a decorative effect different from that of the insert nut 1 or the like, and in addition, for example, a square counterbore portion in which the flange portion 12b just fits is provided around the hole formed in the attached member 2. In the case where the flange portion 12b is engaged with the corner portion of the counterbore portion, the disc-shaped flange portion 12 is inserted into the columnar hole 21 as compared with the inner wall of the hole. Thus, it is possible to reliably prevent the cylindrical shaft portion 11 from idling. In addition, since the effect of the other insert nut 1b is a structure substantially the same as the insert nut 1 grade | etc., Description is abbreviate | 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 inclined surface portion 122c is a gentle inclined surface area formed of a funnel-shaped hexagonal pyramid surface having the axial center of the cylindrical shaft portion 11 as a head vertex. 123c and a steep slope area 124c formed in a conical shape like the steep slope area 124 described above. In addition, about the cylinder shaft part 11, since it is the same structure as the insert nut 1, description is abbreviate | omitted.

  As a result, the insert nut 1c has 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 just fits is provided around the hole formed in the attached member 2. In the case where the flange portion 12c is engaged with the corner portion of the counterbore portion, the disk-like flange portion 12 is inserted into the columnar hole 21 as compared with the inner wall of the hole. In contrast, the cylindrical shaft portion 11 can be reliably prevented from idling. In addition, since the effect of the other insert nut 1c is a structure substantially the same as the insert nut 1 grade | etc., Description is abbreviate | omitted.

[Second Embodiment]
Next, an 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 a description thereof will be 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 portion 122d. Among these, the first gentle slope 125 is connected to the outer end edge 120d of the slope portion 122d, and is provided at an angle at which the tip 30 of the screw body 3 can be easily introduced into the slope portion 122d. Specifically, by providing the first gentle slope 125 having a larger inclination angle than the second gentle slope 126, the drop between the outer edge 120d of the slope portion 122d and the second gentle slope 126 is set large.

  Accordingly, the user confirms that the tip 30 of the screw body 3 enters the gentle slope region 123d from the outer region of the outer end edge 120d of the sloped portion 122d by the hand feeling received from the head. The tip 30 of the body 3 can be surely put into the sloped part 122d, and then the second gentle slope 126 having a smaller inclination angle than the first gentle slope 125 is slid more gently, The tip 30 of the screw body 3 can be guided into the cylindrical shaft portion 11 with higher accuracy.

[Third Embodiment]
9 and 10 is another embodiment to which the technical concept according to 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. 42. Each part will be described in detail below. For the sake of explanation, the “back surface” of the mounted member 40 is used to mean the downward surface in FIGS. 9 and 10.

  The attached member 40 is a wooden plywood. In addition, the to-be-attached member 40 is not limited to this, For example, a synthetic resin board etc. may be sufficient.

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

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

  The inclined surface portion 420 has a funnel shape whose inner diameter increases toward the outer side (downward in this embodiment) 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 region 423 and a steep slope region 424, and the maximum inner diameter 430 of the outer end edge 422 of the slope portion 420 is set to about five times the maximum inner diameter 431 of the insert nut 410. Has been.

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

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

(Work)
With reference to FIG. 9, FIG. 10, the effect of the screw receiving structure 4 of the to-be-attached member 40 is demonstrated.
When the tip 30 of the screw body 3 is applied to the back side 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 a spherical shape similar to the above-mentioned gentle slope area 123 and is inclined more gently 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 inclined. While passing through the gentle 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 30 of the screw body 3 is in a general direction toward the female screw portion 41. Led.

  Then, the side edge on the female screw part 41 side, that is, the tip 30 of the screw body 3 that has reached the inner peripheral corner part 428 in this embodiment is dropped into the steep slope area 424. In this way, it is guided in an accurate 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 matched.

  Thus, 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. The internal thread portion 41 can be slid reliably.

  Further, the work during this time can be performed by groping the tip 30 of the screw body 3 against the inclined surface 420 with the outer edge 422 as a guide without directly observing the position of the opening 421. Since the tip 30 of the screw body 3 can be reliably guided to the inside of the female screw portion 41, the mounting operation 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 end edge 422 is about five times the maximum inner diameter 431 of the insert nut 410. Compared with the size, it is a size that can be found by hand search without direct visual inspection, the size is appropriate and the appearance is well organized, and it does not interfere with other components of the mounted member 40, This does not hinder the structural design of the mounted member 40.

  Thus, the screw body 3 screwed into the insert nut 410 from the opening 421 is rotated in the screwing direction, whereby the male screw of the screw body 3 and the female screw 411 in the insert nut 410 are screwed. In addition, the screw body 3 can be detachably attached to the insert nut 410 of the attached member 40.

  Note that the insert nut 410 may be attached not only at a position such as the back surface side of the attached member 40 but also at a directly visible place such as the surface side of the attached member 40. In this case, it can be used as a universal design.

[Modification 4]
11 is a modified example of the shape of the female screw portion 41 of the screw receiving structure 4 of the attached 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 to slide into the female screw portion 41a. The guide part 42 to guide is provided. In addition, about parts other than the internal thread part 41a, since it is the same structure as the screw receiving structure 4 of a to-be-attached member, description is abbreviate | omitted.

  In the screw receiving structure 4a, the female screw portion 41a is formed by directly engraving the female screw 411 in the hole 401a of the attached member 40a. Thus, the configuration of the female screw portion 41a can be simplified. Thereby, in addition to the effect of the screw receiving structure 4 of a to-be-attached member mentioned above, the work efficiency at the time of providing the screw receiving structure 4a of a to-be-attached member in the to-be-attached member 40a can be aimed at.

  As described above, the insert nut to which the present invention is applied and the screw receiving structure of the member to be attached are easily slid even when the screw body is screwed into the screw hole without directly viewing the opening of the screw hole. Only by a moving operation, the tip of the screw body can be quickly and accurately guided into the opening with a low load.

  The terms and expressions used in the present specification and claims are for illustrative purposes only, and are not intended to be limiting in any way. The features described in the present specification and claims and their terms There is no intention of excluding some equivalent terms and expressions. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention. The words such as “first” and “second” do not mean grade or importance, but are used to distinguish one element from another.

1, 1a, 1b, 1c, 1d Insert nut 11 Cylinder shaft part 111 Female screw 112 Locking structure part 12, 12a, 12b, 12c, 12d Flange part 120, 120a, 120b, 120c, 120d Outer edge 121 Opening part 122 122a, 122b, 122c, 122d Slope portion 123, 123a, 123b, 123c, 123d Slow slope region 124, 124a, 124b, 124c, 124d Steep slope region 125 First gentle slope 126 Second gentle slope 127 Inner edge 128 Inner circumference Corner portion 130 Maximum inner diameter between outer end edges 131 Maximum inner diameter of cylindrical shaft portion 2 Mounted member 21 Hole 22 Counterbore portion 23 Mounted member surface 3 Screw body 30 Tip 4, 4a Screw receiving structure 40 of mounted member 40a Mounted member 401, 401a Hole 402 Back side surface 403 Outer edge 41, 41a Female screw part 410 Insert nut 411 Female screw 412 Locking structure part 42 Guide part 420 Slope part 421 Opening part 422 Outer edge 423 Slow slope area 424 Steep slope area 425 Inner edge 428 Inner peripheral corner 430 Between outer edges Maximum inner diameter 431 Maximum inner diameter of insert nut 9 Insert nut 91 Cylindrical shaft portion 911 Female screw 912 Opening portion 912a Inner end edge 912b Outer end edge 92 Flange portion 921 Surface 93 Locking portion 931 Detaching projection 99 Attachment object 991 Surface

Claims (8)

A cylindrical shaft part in which an internal thread is engraved on the inner wall;
It has a funnel-shaped slope portion extending in a predetermined axial direction and connected to the inside of the cylindrical shaft portion and having an inner diameter that increases toward the outer side opposite to the cylindrical shaft portion. An insert nut comprising: a flange portion that guides the tip of the engraved screw body into the cylindrical shaft portion by sliding the tip of the screw body. The slope portion is
The insert nut according to claim 1, wherein at least a part is formed in a spherical shape that is convex toward the cylindrical shaft portion. In the slope part,
A gentle slope area formed in a region from the outer edge of the slope portion to the middle in the axial direction;
The insert nut according to claim 1, wherein a steep slope region is formed in a region from an intermediate portion in the axial direction of the slope portion to an inner edge, and a steep slope region having a larger slope angle than the gentle slope region. In the gentle slope area,
A first gentle slope connected to the outer edge of the slope portion and introducing the tip of the screw body into the slope portion;
4. The insert nut according to claim 3, further comprising a second gentle slope that is formed with an inclination angle smaller than that of 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 is
The insert nut according to claim 1, 2, 3, or 4, which is set to be not less than 3 times and not more than 10 times the maximum inner diameter of the cylindrical shaft portion. A female screw portion provided on a member to be attached to which a screw body engraved with a male screw is attached;
A funnel-shaped inclined surface portion that extends into the female screw portion and has an inner diameter that increases toward the outer side opposite to the female screw portion has a predetermined axial length, and the screw body is provided on the inclined surface portion. And a guide portion for guiding the tip to the inside of the female screw portion by sliding the tip of the screw. The female thread portion is
The screw receiving structure for a member to be attached according to claim 6, further comprising a cylindrical body that is inserted and fixed in a predetermined hole of the member to be attached and has an internal thread formed on an inner wall. The female thread portion is
The screw receiving structure for a member to be attached according to claim 6, wherein a female screw is directly engraved in a predetermined hole of the member to be attached.

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