JP5709273B2 - Embedded nuts, laminated parts and chairs using them - Google Patents

Description

    The present invention relates to an embedded nut that is embedded and integrated in a part, and parts and industrial products using the embedded nut, and particularly, manufactures and provides embedded nuts and parts and products using the embedded nut. In addition to the fields to be provided, materials and machinery, parts and materials necessary for transportation, storage, assembly and installation, and materials necessary for such materials, machinery and parts, such as wood, stone, etc. , The field of providing various fibers, plastics, various metal materials, etc., the field of electronic components incorporated in them, the field of control-related equipment that integrates them, the field of various measuring instruments, the field of power machines that move the equipment and instruments, Fields generally referred to as industrial machinery, such as the electric power and energy sources that make up the energy, and the oil field, as well as those facilities and equipment Fields related to experimentation, research, display, sales, import / export of these, generals, and results of their use, equipment for making them, collection and transportation of garbage debris generated by operation of equipment, etc. In addition to the related fields, the recycling field that efficiently recycles garbage waste, and the new fields that cannot be envisaged at the present time, there are no unrelated technical fields.

(Points of interest)
Molded plywood used for furniture, etc. is manufactured by laminating thin wooden boards (single board) with an adhesive and molding them into various shapes using a jig. It can be processed into a thinner (thin) shape than solid wood and has a feature that can realize a more delicate design compared to conventional products. For example, it is made of molded plywood. The chair is molded into a curved shape with the seating surface and back integrated, and a plurality of embedded nuts are embedded under the seating surface, and the flanges on the legs are screwed or bolted using each embedded nut. It is known as a general structure that it is tightened and joined by such means as a general structure, but a typical embedded nut rotates during the assembly process when the screw or bolt is tightened. Embedding objects to be embedded If you use a molded plywood chair and receive an excessive load from the chair seat plate or legs, etc. In addition, an external load such as a punching direction, a removal direction, or a tilting direction is applied in parallel to the embedded nut axis, a strong concentrated load is applied to a part of the chair seat plate, and a step due to the embedded corner of the embedded nut Convex deformation may cause the appearance of the top surface of the seating plate, or the embedded nut may rattle or tilt, leading to deformation or breakage of the seating plate. It was done.

(Conventional technology)
Reflecting this situation, proposals that can be used to overcome this situation are not unheard of.
For example, as typified by what is proposed in the following Patent Document 1 (1), a metal plate formed by drilling screw holes in place of nuts at a plurality of locations is used as a synthetic resin under the seat cushion of the chair. Various products such as those that are attached to the upper surface of the seat shell and that can be connected to the bases of the elbow rest that are attached to the left and right sides of the lower surface of the seat shell, as shown in Patent Documents 1 (2) to 1 (9) Various embedded nuts that can be embedded in the wall thickness, etc., and various products such as Patent Documents 1 (10) to 1 (13) can be easily driven and integrated with certainty. There are various types of driven nuts.

    However, as shown in Patent Document 1 (1), when a screw hole is drilled in a metal plate and replaced with an embedded nut, the metal plate is placed within the wall thickness of a chair or other furniture. Furniture and other items that require a delicate design made of molded plywood that must be integrated into one piece have properties such as weight and strength of wood and metal, thermal conductivity, thermal expansion coefficient, and adhesiveness. There is a difficulty in making integration of greatly different materials very difficult, and Patent Documents 1 (2), 1 (4), 1 (5), 1 (7), 1 (9) to 1 ( The embedded nuts and drive-in nuts such as 12) improve the workability of the embedded and drive-in, and can be efficiently integrated. However, after completing the embedded or driven-in into the product, the nut shaft center Driving direction, withdrawing direction, and Re a large external force direction is applied, products wearing or inviting crocodile deformation or damage, or Kitashi a change in mounting attitude of the nut itself, had the disadvantage of easily or worse by dropping loose.

Moreover, in what is shown by patent document 1 (3) and 1 (13), during the bolt fastening operation | work which fits securely in a product thickness, it prevents that it rotates carelessly, It has the advantage that the efficiency and good product rate can be increased, but in both cases, the base end where the deep part of the product wall thickness is embedded in the arm is narrow in the area of the seat surface, and if a large external force is applied, the nut There is a risk that the mounting posture of the device itself may be changed, and in the worst case, it may be loosened and fall off. Further, as disclosed in Patent Documents 1 (6) and 1 (8), the inner depth of the product thickness When the base end embedded in the crocodile or the end of the crocodile opposite to the one where the screw or bolt is screwed has a part that increases the flange-like fixing force, and a large external force is applied However, the flange-shaped seating surface can disperse and absorb external force and is durable. Although the advantage of making it higher can be obtained, in cases such as cases that are embedded in thin walls such as furniture with delicate design, the flange-shaped part deforms the thin wall part of furniture. It left a big problem of causing a situation where it was broken or damaged.
(1) JP-A-7-246127 (2) JP-A-11-351223 (3) JP-A-2001-280325 (4) JP-A-2003-139119 (5) JP-A-2004-28147 (6) Japanese Unexamined Patent Publication No. 2004-58591 (7) Japanese Unexamined Patent Publication No. 2009-30810 (8) Japanese Unexamined Utility Model Publication No. 5-53555 (9) Japanese Unexamined Utility Model Publication No. 6-84013 (10) Japanese Patent Application Laid-Open No. 5-21139 (11) JP-A-8-49716 (12) JP-A-2002-257108 (13) JP-A-2003-90319

(Awareness of problems)
As described above, most of the various embedded nuts and driving nuts that have been proposed so far have been aimed at improving embedding and driving workability. It is assumed that it is a robust part with dimensions and strength. For example, it is embedded in the wall thickness dimension of thin parts and thin parts for high-end furniture where delicate design is important. Embedded nuts that can ensure high durability have not existed so far, and therefore, in the thickness direction of thin plate-like parts, especially for furniture made of molded plywood that achieves high strength, which is thin, light and high This is also true for embedded nuts that are not penetrated, but are embedded so that the nuts are exposed only on the back surface and the nuts are exposed. In such a situation, we have been working on the development and manufacture of more sophisticated furniture for many years, and as we continue to study for it every day, it has been carefully designed. The need to urgently improve the various embedded nuts and driving nuts, etc., to enable the manufacture of furniture that can be manufactured accurately and efficiently, and to realize products with excellent durability. It has come to be.

(Object of invention)
Therefore, the present invention can be efficiently incorporated into a thin-walled target part and the like, and after being embedded in the target object, it does not rotate unintentionally due to screw and bolt screwing work and rotational external force. In addition to being able to be fixed securely, even if a large external force such as the punching direction, withdrawal direction, or tilting direction of the nut axis is applied, the embedded object can be reliably deformed or damaged, and the nut mounting posture can be tilted or dropped. As a result of deciding whether it would be possible to develop a new embedded nut technology that can be prevented easily, we started its development and research very quickly, and as a result of repeating trial and error over many years and numerous trial manufactures and experiments, this time finally new The present invention succeeded in realizing an embedded nut having a new structure, a laminated part having a new structure and a chair having a new structure using the nut, and the following is a representative example of the present invention shown in the drawings. With examples, it is assumed that detailing its construction.

(Structure of the invention)
As will be clearly understood from the embodiments representing the present invention shown in the drawings, the embedded nut of the present invention basically comprises the following configuration.
That is, a flange-like outer end surface is 90 ° or other than the screw screw hole axial center at the base end where the cylindrical nut body with a predetermined diameter screw screw hole is embedded. A flat end face fixing collar that crosses at any one of the predetermined inclination angles is provided, and around the screw screw hole shaft center of the identification wearing collar, around every predetermined angle unit of 180 ° or less In order to achieve a balanced arrangement, two or more hooking wings with an expanded diameter of 120% to 150% are provided to the other parts around the circumference of the wearing heel part, and the fixing heel part and each hooking wing part are provided. In addition to the non-rotating rod, the fixing collar of each non-rotating rod and the hooking wings are opposite to the outer end surface of the ring-shaped inner end surface facing the nut body. While the centripetal wall thickness dimension is embedded and thickened within the depth dimension, the centripetal is stepped toward the wrinkle, or Can be said to be an embedded nut that is gradually thinned to have any cross-sectional contour shape in a stepless manner, and to become a step elimination surface set so that the outer peripheral wall thickness is the thinnest of less than 1 mm. .

Furthermore , a flange-shaped outer end surface is 90 ° with respect to the screw screw hole axis or other than that at the base end where the cylindrical nut body with a predetermined diameter screw screw hole is embedded. A flat end surface fixing hook part that crosses at any one of the predetermined inclination angles is provided, and a long diameter is provided so that a balanced arrangement is provided every 180 ° around the screw screw hole axis center of the identification wearing hook part. An ellipse plate that is provided with two anchoring wings that are 120% to 150% extended relative to the minor axis dimension of the other part of the circumference of the wearing collar that is identified. Or an oblong disc-shaped anti-rotation rod, and the fixing rod of the anti-rotation rod and the hooking wings on the opposite side of the outer end surface to the nut body The ring-shaped inner end face that faces the centripetal wall is thickened within the embedding depth dimension, while the centrifuge is toward the wrinkle It is composed of a stepped surface that is gradually thinned to have a quadratic curved cross-sectional outline shape with a larger radius of curvature, and the outer peripheral wall thickness is set to be the thinnest of less than 1 mm. Embedded nuts are also included .

(Related invention 1)
In relation to the above-described embedded nut, the present invention also includes a laminated part using the same.
That is, it is composed of a plate-like body for surface mounting, and the back surface of the back surface plate portion is provided with a front surface plate portion that is an object to be embedded by integrating the bonding surface of the back surface plate portion in a laminated manner on the back surface. The outer end surface of the embedment nut detent hook, which forms the basis of the present invention, is joined to one or a plurality of appropriate places on the wrinkle joint surface via an adhesive, and is laminated and integrated with the front mounting plate portion. In each case, a back plate portion in which embedded holes corresponding to the contour shapes of the inner peripheral surface and the outer peripheral edge of the ring collar-like inner end surface of the embedded locking nut and the outer peripheral edge of each embedded nut, In each embedding hole, the nut body of each embedding nut and the inner end surface of the ring collar and the outer peripheral edge of the anti-rotation rod are joined together with an adhesive, and other than the location where each embedding nut is installed The bonding surfaces of the front panel part and the back panel part of the In the total thickness of the integrated front and back plate parts and back plate parts, the locking rods for each embedded nut, and at least the base end of the nut body within a predetermined range, This is a laminated part using the embedded nut which forms the basis of the present invention and is integrated into a close contact / embedded shape.

    If this laminated part is shown in a different expression, the basis of the present invention is applied to one or a plurality of appropriate places on the joint surface where the back surface of the laminated laminate formed by laminating and integrating a plurality of plate-like materials is the same. A nut body of each embedded nut at a place corresponding to each embedded nut in the case where the outer end surface of the embedded nut rotation-preventing hook is joined via an adhesive and is laminated and integrated on the same laminated laminate, and Each embedded hole has a backside laminated plate made by laminating and integrating a plurality of plate-like materials, each of which has an embedded hole that matches the contour shape of the ring-shaped inner end face and outer peripheral edge of the locking rod. Each embedding nut body and the inner end face and outer peripheral edge of the ring collar of the same non-rotating hook are joined together with an adhesive, and the outer layers other than the place where each embedding nut is installed Adhesives are also applied between the joint surfaces of the plate and the back laminate. Are integrated in close contact and laminated form, and within the total wall thickness of the integrated front and back laminates, the locking nuts for each embedded nut and at least the base end of the nut body are within a predetermined range. Is a laminated part using the embedded nut that forms the basis of the present invention.

(Related invention 2)
In relation to the above-described laminated parts, the present invention includes a chair using them.
That is, the outer end surface of the embedded nut detent hook, which forms the basis of the present invention, is bonded to one or a plurality of appropriate positions on the back surface of the chair seat surface and / or the back plate portion of the chair back surface. At the place corresponding to each embedded nut when it is joined via the agent and laminated / integrated on the same mounting plate part, the nut main body of each embedded nut, and the ring-shaped inner end surface and outer peripheral edge of the same locking stopper The seat surface for the chair and / or the back plate of the back for the chair, each of which has an embedded hole that matches the contour shape, and the nut body of each embedded nut and the anti-rotation rod for each embedded hole, respectively. The ring-shaped inner end face and the outer peripheral edge are joined together in an adhesive manner via an adhesive, and the joint surfaces of the front plate part and the back plate part other than the location where each embedded nut is disposed are also bonded to each other. Are integrated in close contact / stacked form, and the integrated cover Within the total wall thickness of the head portion and the back plate portion, each embedded nut detent and at least the base end of the nut main body are integrated in a close contact / embedded state, and the chair seat plate and / or A chair frame and / or chair legs are connected with male screws through embedded nuts embedded and integrated in the seat plate and / or back plate. The chair using the laminated part using the embedded nut, which forms the basis of the present invention.

    When the above-mentioned chair included in the present invention is shown as a more specific one, one or a plurality of appropriate places on the joint surface where the back surface of the chair laminate and / or the back surface of the chair laminate on the back surface of the chair is a trap. In addition, each embedded nut is attached to each corresponding place when the outer end surface of the locking nut of the embedded nut, which forms the basis of the present invention, is joined via an adhesive and laminated / integrated on the same outer laminate. A back surface laminate of the seat surface for the chair and / or the back surface of the chair, each of which is provided with an embedding hole that matches the contour shape of the ring-shaped inner end surface and the outer peripheral edge of the lock body In each embedding hole, the nut body of each embedding nut, and the inner peripheral surface of the ring collar-like outer periphery and the outer peripheral edge of the coping stopper are joined in a fitting manner via an adhesive, and other than the location where each embedding nut is installed. The joint surfaces of the front laminate and back laminate , Integrated in an adhesive and laminated form via an adhesive, and within the total wall thickness of the integrated front and back laminates, a detent for each embedded nut, and at least the base end of the nut body A predetermined range of glue is integrated into a close contact / embedded shape to form a seat plate for a chair and / or a back plate for a chair, and the chair is inserted through each embedded nut embedded and integrated in the seat plate and / or the back plate. This is a chair using laminated parts using embedded nuts that form the basis of the present invention, wherein the frame and / or the legs of the chair are connected by male screws.

    As described above, according to the embedded nut of the present invention, unlike the conventional ones, the nut main body detent hook is embedded with the embedded nut from the characteristic features as described above. When embedded in the thickness, the fixing area is greatly increased, the frictional force is greatly increased, and the nut body rotates inadvertently during the assembly operation of screwing the male screw into the screw threading hole of the nut body. In addition, the external force input through the nut body can be dispersed more widely within the wall thickness of the object to be embedded, so that the durability is greatly increased. In addition, the centripetal part integrated with the base end of the nut body of the anti-rotation rod has the highest elastic strength of the brace root. The elastic strength of the outer periphery This is the lowest anti-rotation rod, and the centripetal point is set so that the elastic strength gradually decreases as it goes from the root of the bracelet to the outer periphery of the fold. When embedded, if an external load such as the punching direction, withdrawal direction, or tilting direction of the nut body axis is applied, a larger load is applied from the base of the non-rotating rod to the thickness of the object to be embedded. Dispersed and transmitted over a wide area, the transmission load to the outside gradually decreases as the centrifugal head goes to the trap, and the centrifugal force of the anti-rotation rod disperses and transmits only the weakest load from the outer periphery of the trap, It is possible to reliably prevent deformation and breakage of the object to be embedded and the inclination and dropout of the mounting posture of the nut body, and achieve excellent durability and reliability compared to conventional embedded nuts. Features Obtained.

    In addition, the embedded nut, which is formed by extending each retaining wing from the anchor body for locking the base end of the nut body, further expands the fixing area, and the external force input through the nut body is used to increase the thickness of the object to be embedded. 2 or more of the retaining wings extended from the fixing flange of the nut body base end detent can be inserted into the screw threaded hole of the nut body. When an external force is applied to rotate the nut body around its axis during assembly work for screwing in or using an embedded object, the rotational force is applied to the thickness of the embedded object. It can be transmitted and dispersed more reliably, and can achieve much higher durability.

    The diameter dimension is identified with respect to the other part around the wearing collar part, so that the circumference is arranged around the screw screw hole shaft center of the fixing part for rotation prevention and around the predetermined angle unit of 180 ° or less. When two or more retaining wings with 120% to 150% expansion are provided, each of the retaining wings at two or more places on the non-rotating rod when embedded in the wall thickness of the object to be embedded However, the external force in the direction around the axis of the nut body can be distributed in a balanced manner so that a remarkably high resistance force can be generated, and the short diameter of the fixing collar and the length of each retaining blade When the ratio to the diameter is 150% or less and an external force is applied in the direction of the fall, the amount of the retaining blade (long diameter) of the nut body falls into the hook and the amount of fall into the fixing collar (short diameter) It is set so as not to cause a big difference between the two, and it has excellent durability. It can be as.

    The ring-shaped inner end surface facing the nut body, which is opposite to the outer end surface of the locking rod, increases the thickness of the centripetal wall, while the thickness gradually decreases toward the centrifugal wall. The embedded nut, which is set to have the outermost peripheral wall thickness as the thinnest and serves as a step elimination surface, makes it possible to manufacture the entire embedded nut from the same and homogeneous material. The resin material can be injection molded homogeneously, or the metal material can be cast, machined, or forged. Such a characteristic shape exhibits a great effect that the thickness dimension of the embedded object can be set to be extremely thin.

    The major axis is identified so that the non-rotating collar is in a balanced arrangement every 180 ° around the screw threaded hole shaft center of the fixing collar. 120% to 150% of the minor axis dimension around the worn collar Two extended wings are provided, and the fixing hook and each wing are made up of a pair of wings with an opening angle of 180 ° to prevent rotation of the nut body. The action can be maximized, and the ring-shaped inner end face is thickened within the depth of the centripetal embedding wall thickness, while the radius of curvature increases toward the centrifuge wall. The outer circumferential edge of the ring-shaped inner end face is assumed to be a step-resolving surface that is gradually thinned to have a quadratic curved cross-sectional outline shape and the outer peripheral wall thickness dimension is set to be the thinnest of less than 1 mm. From the nut to the base of the nut body is realized with a curved surface, Unnecessary stress concentration can be eliminated, and the durability can be dramatically increased. In addition, it has excellent durability and aesthetics without causing unnecessary steps or irregularities in the embedded part of the object to be embedded. As a result, the reliability can be further improved.

    In addition, when the washer that is used to join parts made from different materials is integrated with the tip of the nut body, the tip of the nut body is protected from concentrated input of external loads and transmitted to the entire nut body. -It becomes possible to disperse, and the mounting strength and durability of the male screw in the screw screw hole can be greatly increased.

    An embedded nut of the present invention is embedded between a front plate part and a back plate part, and a laminated component that is an object to be embedded so as to be joined in a laminated form is provided with an embedded nut between two plate members to be laminated. The embedded nuts of this invention are applied to a material such as solid wood that is embedded in a solid material and has a similar appearance to that of an embedded nut embedded in a solid material. By incorporating it, the conventional embedded nut can not be used to obtain the desired durability and can be used for thin parts and thin parts that could not be put to practical use. It becomes very useful for the manufacture and use of delicate furniture, etc., and the embedded nut of the present invention is embedded between the front laminate and the back laminate and bonded in a laminated manner. These laminated parts can secure higher strength than solid wood materials, and if the same level of strength is ensured, it is possible to realize thinner and thinner products, and more delicate and excellent design. It has the feature that it is effective for the manufacture of furniture and other items.

    And the chair using the embedded nut and laminated part of this invention is a chair with respect to the seat surface and / or the back of the chair as a laminated part in which the embedded nut is embedded between the front plate part and the back plate part. It is possible to provide a chair that is more delicate and durable than before by using two solid wood boards, etc. A big effect will be demonstrated.

    In addition, the chair frame and / or the chair legs are integrated with the chair seat and / or chair back as a laminated part in which the embedded nut of the present invention is embedded between the outer laminate and the back laminate. The chair can be made into a molded assembly made by laminating a plurality of single plates, which is much more durable than the one using the above-mentioned two solid wood boards. Since the chair can be made thinner, thinner and more delicate with sufficient durability, it has a more significant advantage. Become.

In implementing the present invention having the above-described configuration, the best or desirable mode will be described.
The nut body can be drilled with a screw screw hole, or has an inner wall of the screw screw hole, so that screws and bolts can be screwed from the tip, and an anti-rotation rod can be integrated at the base end And has a cylindrical body with a screw threaded hole with a predetermined diameter, and the base end thereof is either 90 ° or other predetermined angle of inclination with respect to the screw threaded hole axis. On the other hand, it must be formed by integrating a non-rotating hook having a flat end surface fixing hook that crosses at one side, and is made of metal or synthetic resin having sufficient and uniform elastic strength When incorporating into wood, laminated timber, molded plywood, etc., it is desirable to consider the balance of strength and make it made of synthetic resin such as polyacetal or vinyl chloride, as shown in the examples described later. .

    The screw threaded hole of the nut body shares the function of screwing and tightening the target screw or bolt, and should be a screw hole of a predetermined nominal diameter and a predetermined nominal length. As a result, the internal thread can be machined, and it can be a cylindrical hole with an inner diameter that is smaller than the outer diameter of the target male screw, slightly larger than the valley diameter of the male screw, and sufficiently smaller than the peak diameter. More specifically, any one of a through screw hole, a threaded through hole, a blind screw hole, and a threaded blind hole that penetrates the nut body can be used.

    Non-rotating rods prevent rotation of the nut body when it is screwed, tightened, unscrewed, or removed using a screwdriver or screw with a screwdriver at the base end of the nut body when embedded in the object to be embedded It is possible to share the function that can prevent punching, withdrawal, falling, etc. of the nut body due to external force, and the flange-shaped outer end surface is at the base end where the nut body is embedded, A centripetal point integrated with the base end of the nut body is provided with a fixing end portion having a flat end surface that crosses at 90 ° or any other predetermined inclination angle with respect to the screw thread hole axial center. The elastic strength of the root part of the buckle is the highest among the anti-rotation coffins, and the elastic strength of the centrifugal outer periphery of the anti-rotation coffin is the lowest among the anti-rotation coffins, and the centripetal force is From the root of the brace toward the outer periphery of the centrifuge It must be set so that the elastic strength gradually decreases, and the diameter dimension is set to be more than the other part around the identified wearing heel part so as to be balanced around the screw threaded hole axis center of the identified wearing heel part. When two or more extended retaining blades are provided and the embedded nut is embedded in an object to be embedded, each retaining blade can more reliably prevent the nut body from rotating due to external input. In addition, when a load in the falling direction is applied to the nut body, more load is transmitted to the outside from the base part of the locking rod, and the transmission load to the outside is gradually reduced toward the centrifugal trap. It should be possible to transmit only the weakest load to the outside from the outer peripheral edge of the locking rod, and as shown in the examples described later, it is made of the same material as the nut body and integrated. It shall be formed into Although it is desirable, the base part of the locking rod is made of a different material and the outer peripheral edge is made of different materials, and can be integrated with the base end of the nut body. It can be said that the overall shape is preferably one of a plane perfect circle shape, a plane elliptical plate shape, or an oblong plate shape, but it can be of various shapes such as a plane rectangular shape, a rhombus shape, and a bowl shape. There is no problem.

    The fixing collar holds the embedded nut nut body so that it does not come out of the embedded object when the embedded nut is embedded in the wall thickness of the embedded object, and the external force applied to the nut body Is a nut that is capable of efficiently transmitting and dispersing to the object to be embedded and becomes a part or all of the non-rotating rod, so that it can be joined to the joint surface of the surface plate of the object to be embedded. A flat end surface that is continuous with the base end surface of the main body, and the outer end surface of the flange shape intersects at 90 ° or any other predetermined inclination angle with respect to the screw screw hole axis. In addition, it is desirable that the latching wing portion, which is in a balanced arrangement around the screw screw hole axial center, is provided so as to expand in the centrifugal direction, and the latching wing portion is a function of the fixing hook portion. Embedded and embedded in the object to be embedded. The nut nut has the function of preventing the main body of the nut from being inadvertently rotated by an external force, and the diameter dimension is identified from each of two or more that are in a balanced arrangement around the screw screw hole axis. More specifically, the diameter dimension is identified and worn from two or more locations that are in a balanced arrangement around the screw screw hole axial center and around a predetermined angle unit of 180 ° or less. It is desirable to expand 120% to 150% with respect to the other parts around the collar part, and as shown in the embodiments described later, the arrangement is balanced every 180 ° around the screw screw hole axis. From two locations, the major axis dimension can be extended by 120% to 150% with respect to the minor axis dimension of the other part around the identification wearing heel part.

    It is the surface opposite to the outer end surface that coincides with the base end of the nut body of the rotation prevention hook. It is possible to give the function of gradually decreasing the elastic strength, for example, while the ring-shaped inner end surface thickens the centripetal wall thickness while the thickness gradually decreases toward the centrifugal wall. It can be a step elimination surface set to make the peripheral wall thickness the thinnest.In this case, while the centripetal thickness is within the embedded depth, the wall thickness is increased. Gradually thinned to have either a stepped or stepless cross-sectional contour as the centrifuge goes to the side, and the outer peripheral wall thickness dimension was set to be the thinnest of less than 1 mm. It is desirable to have a contoured surface with a reverse staircase shape or a straight inclined line shape. In addition, as shown in the examples to be described later, the centripetal thickness is thickened within a range that fits within the embedding depth dimension, while the radius of curvature increases toward the centrifugal trap. For example, a catenary curve or parabola as seen on a bridge pier with a half of the peak, or a part of the curve, or a cross-sectional contour shape of a quadratic curve such as a similar curve The outer wall thickness should be set so as to be thinner and less than 1 mm.

    In addition, the tip of the nut body can be provided with a washer capable of imparting desired properties such as rigidity and elasticity as appropriate according to the mounting parts such as screws and bolts. It is possible to provide a metal washer for reinforcement, or to provide a washer made of synthetic resin for the purpose of anti-slip, anti-vibration, noise reduction, sound insulation, etc. It can be formed by chemical molding.

The embedding object is an embedding nut assembling object, and a front plate part made of a plate member for the front cover and a back plate part as a plate body whose back surface can be integrated and bonded in a laminated manner to the face joint surface. It can be made of solid wood, bamboo, metal, synthetic resin, etc., or laminated wood, molded plywood, composite material, etc. Various functions such as decoration and finishing are possible, and the back surface is used as a joint surface with the back plate, and the outer end surface of each embedded nut detent is a joint surface that can be closely contacted without gaps. It is possible to make a surfaced laminated plate made of molded plywood or laminated material, and the back plate part can be integrated with the back side of the surfaced plate part in a laminated manner, Each embedded nut on the joint surface is laminated and integrated with the cover plate At the corresponding location, at least the base end of each embedded nut nut main body and the contour shape of the ring-shaped inner end surface (or step elimination surface) opposite to the outer end surface of the same locking stopper and the outer peripheral edge Matching embedding holes must be perforated, respectively, and can be a back laminated board made of molded plywood or laminated wood. The embedding object is a furniture part or a building part. It can be made into various articles such as joinery, home appliances, and crafts. For example, as shown in the examples described later, a chair seat surface formed by laminating and integrating a plurality of single plates and / or It can be the back for a chair.
In the following, the structure of the present invention will be described in detail together with an embodiment representative of the present invention shown in the drawings.

The drawings show some typical embodiments embodying the technical idea of the embedded nut of the present invention, a laminated part using the embedded nut, and a chair.
It is a perspective view which shows an embedding nut. It is a front view which shows an embedding nut. It is a bottom view which shows an embedding nut. It is a side view which shows an embedding nut. It is a top view which shows an embedding nut. It is a front view which cut and shows the embedding nut integrated in a chair. It is a front view which cut and shows the embedding nut incorporated in the chair. It is a bottom view which shows the embedding nut integrated in the chair. It is a perspective view which shows a chair. It is a perspective view which shows the attachment state of a chair leg part. It is a bottom view which shows the embedding nut which made the rotation prevention collar the plane ellipse shape. It is a perspective view which shows the embedding nut which made the rotation prevention collar the plane ellipse shape. It is a front view which cut and shows the embedded nut embedded so that it might sink to the front-end | tip of a nut main body.

    In the case shown in FIG. 1 to FIG. 5, the outer end surface 31 is at 90 ° with respect to the axis C of the screw screw hole 20 at the base end 21 of the nut body 2 having the screw screw hole 20 formed therein. The fixing collar 4 is provided in a cross shape, and two or more retaining wings 5 and 5 are set to be expanded so as to be balanced around the screw screw hole 20 axis C of the identification wearing collar 4. In addition, the anti-rotation rod 3 including the fixing hook portion 4 and the retaining blade portions 5 and 5 is used, and the anti-rotation rod 3 has an elastic strength of the base portion 30 and the anti-rotation rod 3. The anti-rotation claw 3 has the lowest elastic strength of the outer periphery 31 of the anti-rotation rod 3 and the centripetal force from the root 30 of the anti-rotation rod 3 and the outer periphery of the centrifuge A typical example of the embedded nut of the present invention is such that the elastic strength gradually decreases toward 31. It is an example.

    As can be clearly seen from these drawings, the embedded nut 1 of the present invention is a single polyacetal resin molded product as a whole, and has a cylindrical nut body 2 having an outer diameter D of 15 mm and an overall length L of 25 mm. A screw threaded hole 20 having a nominal diameter (predetermined inner diameter) M of 5 mm is concentrically penetrating in the center of the base, and a flat flange-like shape is formed on the base end 21 where the nut body 2 is embedded in a cylindrical appearance. The outer end surface 40 is integrally provided with a fixing end portion 4 having a flat end surface that is crossed at a predetermined angle A90 ° with respect to the axial center C of the screw screw hole 20. The two retaining wings 5 and 5 are expanded in the centrifugal direction so that they are arranged in a balanced manner every 180 ° around the screw screw hole 20 axis C. The major axis dimension LD of these retaining wings 5 and 5 is 40 mm. 1 for the short dimension SD (30 mm) of the other periphery around the fixing collar 4 An elliptical plate-shaped anti-rotation rod comprising the fixing rod 4 and the retaining blades 5 and 5 and expanded at a rate of 133% within a range of 20% to 150%. 3, and the fixing collar 4 and the retaining blades 5, 5 of the anti-rotation collar 3 are the opposite surfaces of the outer end surface 40 and face the nut body 2. The end face 32 is thickened with a wall thickness T1 of the centripetal wrinkle (base portion 30) as 5.5 mm which fits in a depth of embedding in the embedding object 8 to be described later, while the centrifuge moves toward the wrinkle. The stepped surface 6 is gradually reduced in thickness so as to have a quadratic cross-sectional contour shape with a large curvature radius, and the thickness T2 of the outer peripheral edge 31 is set to be the thinnest of 0.5 mm. is there.

The example shown in FIGS. 6 to 10 shows a laminated part 8 using the embedded nut 1 of the present invention shown in FIGS. 1 to 5 of the first embodiment and a chair 9 using the same. The laminated part 8 having a seating surface 90 for 9 and a back surface 91 integrated therewith is laminated and integrated with a plurality of thin wooden single plates so that the seating surface 90 for the chair 9 and the back surface 91 are connected by a continuous curved surface. In addition, on the surface 83 exposed on the outer side of the outer surface after completion, a beautiful veneer veneer is attached, and the surface layering made of molded plywood is formed by pressure molding and bonding under high temperature conditions A plate 81 and an object 80 to be embedded comprising a back laminated plate 84 made of molded plywood manufactured in the same process, which can be bonded in a laminated manner to the joining surface 82 on which the back surface of the front mounting surface 83 becomes a trap. The seating surface of the cover laminate 81 One embedded nut 1, 1,... Of the present invention is arranged on each of the four balanced points on the joint surface 82 in the range opposite to 0, and the surface laminated board 81 seat. Each embedded nut 1, 1,... On the surface 90 joining surface 82... Each embedded nut 1 in each corresponding embedded nut 1, 1,. , 1, ... and nuts 2, 2,. .., A total of four embedding holes 86, 86,.
Each of the embedded nuts 1, 1,..., The nut body 2, 2,. After the molding, it can be integrated through an adhesive or a fitting mechanism (both not shown).

    Further, as shown in FIGS. 11 and 12, the embedded nut 1 can have an oblong shape in the planar shape of the locking hook 3, and although not shown, It is possible to replace the non-rotating hook 3 having only the flat perfect fixing hook 4 without providing the retaining blades 5, 5,.

    As shown in the two-dot chain line rectangular section of FIG. 6, the joint surface 85 of the back surface laminate 84 of the embedding object 80 is known, and the embedding holes 86, 86,. As shown by the arrows, each of the four embedded nuts 1, 1,... Is connected to each of the nut bodies 2, 2 through a thermosetting resin adhesive (not shown). ............ Fittings near the base ends 21, 21, ... and the step elimination surfaces 6, 6,... , And the embedded nuts 1, 1,..., The outer end surfaces 40, 40,... Of the non-rotating hooks (the fixing hook 4 and the hooking blades 5, 5) 3, 3,. , And the embedded nuts 1, 1... Over the entire surface of the joining surface 85 of the back laminated plate 84 other than the locations where the nuts are disposed, using a thermosetting resin adhesive (not shown). Then, the cover laminate 81 and the back laminate 84 are integrated and bonded under high temperature conditions while being joined and integrated in a laminated manner over the entire surface 82 of the cover laminate 81. In the total thickness of the embedding object 80 made of, the anti-rotation eaves 3, 3,... Consisting of the fixing eaves 4 of the embedding nuts 1, 1,. .. And the base end 21 of the nut body 2, 2,...

    As shown in FIGS. 6 to 10, a total of four pieces embedded in the thickness of the seat surface 90 for the chair 9 integrated with the back surface 91 for the chair 9 of the object 80 to be embedded, which is the laminated component 8. .., Embedded nuts 1, 1,..., Integrated with the washer 7, are provided at four locations provided in the squares of the upper rectangular frame of the chair leg F as shown in FIG. 6. The plate-shaped receiving seats R, R,... Are joined via the hard rubber annular buffer B, and the screws S with washers are inserted through the mounting holes H, H,. As shown in FIG. 7 and FIG. 8, S,... Are screwed together and fixed firmly and firmly fixed and integrated to complete the chair 9.

    Further, as shown in FIG. 13, the thickness of the back surface laminate 84 of the embedding object 80 that is the laminated component 8 exceeds the total length L (shown in FIG. 2) of the embedding nut 1, and 3 and the nut body 2 are not limited to the vicinity of the base end 21 but are embedded in the thickness of the surface laminate 81 and the back laminate 84 so that the nut body 2 tip 22 is also submerged. It can be either flush with the bottom surface of the back laminate 84 or submerged.

(Operation / Effect of Example 1)
As shown in FIGS. 6 to 8, the embedded nut 1 of the present invention having the above-described configuration is a process of attaching the leg portion F to the lower surface of the chair 9 seat surface 90 as the embedded object 80 that is the laminated component 8. During the operation of screwing and tightening the male screws S, S,... To the respective embedded nuts 1, 1,..., In the direction indicated by the solid line arrow in FIG. , A rotational force centered on the axis C (shown in FIG. 2) is applied, but each embedded nut 1, 1,... As shown in FIG. 7 and FIG. 8, the retaining blade portions 5 and 5 that are expanded with an opening angle of are closely attached between the joint surfaces of the embedding object 80 (laminate component 8) the cover laminate 81 and the back laminate 84. The nut body 2 is coupled to generate a large frictional force. From being rotated in the axis C direction around it can be made reliably be prevented.

    Further, as shown in FIGS. 7 to 10, the embedded nuts 1, 1,... Embedded in the thickness of the seat surface 90 of the completed chair 9 are the seat surface 90 and the chair leg F. When receiving an external force input from, a force to drive, a force to pull out and / or a force to tilt the axis C is generated in a direction (axial direction) parallel to the axis C shown in FIG. However, each of the embedded nuts 1, 1,..., The non-rotating hook 3, and the stepped surface 6 has a unique quadratic curved vertical cross-sectional contour shape that integrates the base end 21 of the nut body 2 with the root. The elastic strength of the portion 30 is the highest among the anti-rotation rods 3, the elastic strength of the centrifugal outer periphery 31 of the anti-rotation rod 3 is the lowest among the anti-rotation rods 3, and 40 mm so that the elastic strength gradually decreases as the centripetal point moves from the root portion 30 toward the outer peripheral edge 31 of the centrifuge. Since the thickness dimension of each part is set to change smoothly in the range of 0.5 mm, more load is transmitted from the base part 30 of the locking rod 3 to the thickness dimension range of the seating surface 90. However, the more the centrifugal force of the anti-rotation rod 3 is directed toward the hook, the more elastically deformed so as to gradually reduce the transmission load within the thickness range of the seating surface 90, and the centrifugal lock of the anti-rotation rod 3 is Only the weakest load can be transmitted / dispersed from the peripheral edge 31, and even when an excessive external force is applied to the embedded nuts 1, 1,. There is an effect that it is possible to surely prevent the ring-shaped swell deformation, cracking, breakage, and the like caused by the outer peripheral edge 31 of the barb 3.

    As shown in FIGS. 6 and 7, when the washer 7 is attached to the front end surface 22 of the embedded nut 1 and the nut body 2, the external force input through the chair leg F receiving seat R is applied to the end of the nut body 2. It is possible to prevent deformation and breakage by concentrating on a part of the surface 22, and receiving the entire external force input in a uniform and distributed manner on the entire front end surface 22 of the nut body 2. It can be efficiently transmitted to the anti-rotation rod 3 so as to be a bending stress or a compressive stress to 2, and can be dispersed and absorbed in a wide range of the seating surface 90 of the object 80 embedded in the laminated part 8. Benefits are gained.

    Further, as shown in FIGS. 6 and 7, the chair 9 in which the annular cushioning body B is interposed between the lower surface of the back surface laminated plate 84 of the laminated component 8 and the chair leg F receiving seat R as shown in FIGS. Since most of the load applied to the seating surface 90 is transmitted to the chair leg F via the annular buffer B and the receiving seat R, and the impact force can also be buffered, the external force applied to the embedded nut 1 In addition to the economic effect of significantly reducing the amount of the material and making it extremely durable, it is extremely advantageous in terms of safety in use.

(Conclusion)
As described above, the embedded nut, the laminated part and the chair using the same according to the present invention can achieve the intended purpose evenly by the new configuration, and are easy to manufacture, and the conventional embedded nut. Compared to furniture and other technologies that use sushi, the durability can be greatly increased, ensuring strength equal to or higher than that of conventional products, and can be made thinner and thinner to realize products with more delicate designs. In addition to being light and inexpensive, it can be made much more economical, and in addition, the workability of molding and assembly can be greatly improved. In spite of excellent design, it has not been possible to solve the problems in manufacturing technology, and the industrial design industry and furniture manufacturing industry that had to give up practical use, as well as more sophisticated furniture and conventional products. General households and companies that want to offer other industrial products, and various industrial products manufacturing industry, joinery industry, construction industry, etc. who want to quickly deliver new products with excellent design to such general households and companies, It is highly evaluated in various sales industries and is expected to be widely used and spread.

1 Embedded nut 2 Nut body
20 Same screw threaded hole
M Nominal diameter of screw screw hole (predetermined inner diameter)
21 The base end of the nut body
C Same axis of screw screw hole (nut body)
D Same nut outer diameter
L Total length of nut body
22 Same tip (tip face)
3 Non-rotating cage
30 Same root part
T1 thickness at the base part
31 Same outer periphery
T2 Same outer peripheral wall thickness
32 Same ring-shaped inner end face 4 Fixing collar
40 Same outer end face
A Angle with respect to the same axis C
SD Same short dimension 5 Hanging blade
LD Same major axis dimension 6 Step-resolving surface 7 Washer 8 Laminated component
80 Same embedded object
81 The same laminated board (front plate part)
82 Joint surface
83 Same surface
84 Same as above Laminated board (back plate)
85 Joint surface
86 Embedded hole S Male screw 9 Chair
90 Seat for chair
91 Same as above Back for chair F Leg for chair (and / or frame for chair)
R receiving seat H mounting hole B annular buffer

Claims (8)

A flange-shaped outer end surface is 90 ° or other predetermined inclination with respect to the screw screw hole shaft center at the base end where the embedded cylindrical nut body with a screw screw hole having a predetermined diameter is formed. Provided with a flat end surface fixing collar that crosses at any one of the angles, and is balanced around the screw threaded hole axis of the identification wearing collar and around a predetermined angle unit of 180 ° or less In order to be arranged, two or more hanging wings with a diameter dimension of 120% or 150% expanded from the circumference around the other part of the identified wearing heel part are provided. In addition to the locking rod, the ring-shaped inner end surface facing the nut body is the opposite surface of the fixing hook portion of each non-rotating rod and the hooking wing portion, and facing the nut body. While the thickness of the wall thickness is increased within the embedding depth, the radius of curvature increases as the centrifuge moves toward the wall. An embedded nut characterized in that it becomes a step-resolving surface that is gradually thinned so as to have a quadratic curved cross-sectional contour shape and the outer peripheral wall thickness is set to be the thinnest of less than 1 mm.     A flange-shaped outer end surface is 90 ° or other predetermined inclination with respect to the screw screw hole shaft center at the base end where the embedded cylindrical nut body with a screw screw hole having a predetermined diameter is formed. A flat end face fixing hook part that crosses at any one of the angles is provided, and the major axis dimension is identified so as to be balanced every 180 ° around the screw screw hole axis center of the identification wearing hook part Two hanging wings extended from 120% to 150% of the short diameter of the other part around the wearing heel part are provided, and are composed of a fixing heel part and each hanging wing part. One of the disk-shaped non-rotating hooks, and the fixing hooks of the non-rotating hooks and the hooking wings on the surface opposite to the outer end surface and facing the nut body The saddle-shaped inner end face is thickened within the depth of the centripetal burial wall, while the curvature increases toward the centrifugal wing. It is characterized in that it is gradually reduced in thickness so as to have a quadratic curved cross-sectional contour shape with a large radius, and becomes a step elimination surface set so that the outer peripheral wall thickness is the thinnest of less than 1 mm. Embedded nut. The embedded nut according to any one of claims 1 and 2 , wherein the nut main body and the locking hook are made of a synthetic resin molded product as a whole. Nut body, the tip portion of the opposite I to the proximal end that integrates detent brim, was made by integrating the washer serving as a junction with another material made parts claims 1 3 The embedded nut according to any one of claims. It consists of a plate-like body for the surface mounting, and the back surface of the back surface plate portion is provided with a front surface plate portion that is an object to be embedded by integrating the bonding surface of the back surface plate portion into a laminated shape on the back surface. 5. The outer end face of the embedded nut detent according to any one of claims 1 to 4 is joined to one or a plurality of appropriate places on the face via an adhesive, and is laminated and integrated with the outer plate part. The back plate has holes that match the contours of the nut body of each embedded nut and the ring-shaped inner end surface and the outer peripheral edge of each locking nut at the location corresponding to each embedded nut. In each embedded hole, the nut body of each embedded nut, and the ring-shaped inner end surface and outer peripheral edge of the locking rod are joined to each other through an adhesive, and each embedded nut is disposed. The bonding surfaces of the surface plate part and the back plate part other than the part are also bonded via an adhesive. Integrate closely and laminated, and within the total wall thickness of the integrated front and back plate parts, the locking rod for each embedded nut, and at least the base end of the nut body within a predetermined range, A laminated part using the embedded nut according to any one of claims 1 to 4 , wherein the laminated nut is integrally formed in an intimate and embedded state. The embedded nut detents according to any one of claims 1 to 4 , respectively, at one or a plurality of appropriate positions on the joint surface where the back surface of the surface laminated plate formed by laminating and integrating a plurality of plate-shaped materials When attaching the outer end surface of each embedded nut with an adhesive and laminating / integrating the same outer laminated plate, the nut body of each embedded nut and the ring of the same locking stopper Nut body of each embedding nut in each embedding hole, each of the embedding holes is made by laminating and integrating a plurality of plate-like materials, each having an embedding hole that matches the contour shape of the inner end face and outer peripheral edge In addition, the ring-shaped inner end face and the outer peripheral edge of the anti-rotation heel are joined to each other in a fitting manner via an adhesive, and each of the front laminated board and the back laminated board other than the place where each embedded nut is disposed The joint surfaces are also integrated in a close-contact / stacked manner via an adhesive. Within the total thickness of the integrated front and back laminates, the detents for each embedded nut and the at least the base end of the nut body are integrated in a tightly and embedded manner. A laminated part using the embedded nut according to any one of claims 1 to 4 . 5. The outer end face of the embedded nut detent rod according to claim 1 , at one or a plurality of appropriate positions on the back surface of the chair mounting surface and / or the back plate of the chair back surface. In addition, when joining via an adhesive and laminating and integrating with the same mounting plate part, the nut body of each embedded nut and the ring-shaped inner end surface of the same locking stopper For the seat body for chairs and / or the back plate of the back for chairs, each of which has an embedding hole that matches the contour shape with the outer peripheral edge, the nut body of each embedding nut and the anti-rotation for each embedding hole Join the ring-like inner end surface and outer peripheral edge of the ridge in a fitting manner via an adhesive, and also bond the joint surfaces of the front plate part and back plate part other than each embedded nut installation location Integrated into a close-contact / stacked form via an agent, and the integrated table Within the total wall thickness of the plate portion and the back plate portion, each embedded nut detent and a predetermined range of at least the base end of the nut body are integrated into a close contact and embedded shape, Or a chair back plate and a chair frame and / or a chair leg connected by male screws via embedded nuts embedded and integrated in the seat plate and / or back plate. The chair using the laminated component according to claim 5 . The locking nut for the embedded nut according to any one of claims 1 to 4 , respectively, at one or a plurality of appropriate positions on the joint surface where the back surface of the cover laminate on the chair seat surface and / or the back surface of the chair is a trap. When the outer end surface is joined via an adhesive and laminated / integrated with the same outer laminated plate, the nut body of each embedded nut and the ring-shaped inner end surface of the locking rod The seating surface for the chair and / or the back laminated plate on the back for the chair, each of which has an embedding hole that matches the contour shape with the outer peripheral edge, the nut body of each embedding nut in each embedding hole, and the same locking rod The ring-shaped inner end face and the outer peripheral edge are joined to each other in a fitting manner via an adhesive, and the joint surfaces of the surface laminated board and the back laminated board other than the place where each embedded nut is disposed are also adhesive. Are integrated in close contact / stacked form, and the integrated table Within the total thickness of the laminated plate and the back laminated plate, a locking rod for each embedded nut, and at least the base end of the nut main body is integrated in a close contact / embedded state, The chair frame and / or the chair leg are connected with male screws through embedded nuts embedded and integrated with the seat plate and / or the back plate. A chair using the laminated part according to claim 6 .

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