Loosening prevention device

Abstract

The present invention relates to loosening prevention device configured in the following manner: when a bolt unit and a nut unit made of a polymer resin material are coupled to each other to form a thread structure fastening unit, the nut unit having an engaging step receiving unit corresponding to an engaging step of the bolt unit in the thread structure fastening unit slides past an engaging step sliding unit of the bolt unit while rotating in the forward direction; the engaging step remains seated, positioned, and fastened in the engaging step receiving unit; and if an external force having a predetermined magnitude is applied in the reverse rotation direction, an engaging step receiving unit resistance surface of the nut unit moves past an engaging step resistance surface of the bolt unit, thereby unfastening the thread structure fastening unit.

Description

anti-loosening device

[0001] The present invention relates to a release prevention device.

[0002] Specifically, the present invention is an invention for fundamentally preventing the bolt and nut from being separated due to vibration or various external environments when a pipe or various fittings have a bolt and a nut and the bolt and nut are fastened to each other by a screw structure or the like.

[0003] In our daily lives, pipes and various fittings are widely used, and there are various accessories that connect them.

[0004] The most commonly used fittings are L-shaped or T-shaped fittings, which connect pipes or tubes together in an L or T-shape, and in the case of union couplings and bushings, they connect pipes or tubes of the same or different diameters in a straight line without bending them.

[0005] These accessories can be called fittings, which are usually used to connect pipes or tubes with a threaded structure consisting of a bolt and a nut.

[0006] However, pipes, tubes, and fittings with screw threads often become loose or loosen / separate over time due to continuous vibration or some external force, causing the screw threads to rotate in the opposite direction instead of the forward direction.

[0007] In order to prevent the bolt and nut from becoming loose or being released / separated, there are methods such as applying a very strong force when fastening with a screw structure so that it does not become loose or be released / separated easily, or adding a fixed pin structure to prevent reverse rotation itself, but there are many cases where it is difficult to release the fastening again.

[0008] Furthermore, when using a screw structure joint, if both the pipe / tube and fittings are made of metal, there is a higher possibility that the joint strength will weaken and reverse rotation will occur due to continuous vibration or external force, causing the fittings to become loosened / separated.

[0009] If the fastening is not released again, it can be joined by welding or other methods, so there are inherent problems with screw fastening.

[0010] The present invention was invented with the purpose of preventing the pipes or fittings from being easily released / separated by continuous vibration or external force when the pipes or fittings are made of polymer resin material rather than metal material and such component structures are fastened through a screw structure joint.

[0011] Looking at the prior art document 1 invention related to the background art, this invention relates to a mechanism in which a locking block protrusion is formed, and although it has a function of preventing the nut from loosening due to vibration, the first locking block protrusion and the second locking block protrusion must have a symmetrical shape and meet exactly to be fastened, and further, since the height of the locking protrusion is low, when the nut rotates and is fastened due to the characteristics of the screw joint structure, if the first locking block protrusion and the second locking block protrusion do not exactly match, only about one locking protrusion is slightly half-hooked, resulting in incomplete fastening, and thus, there is a disadvantage in that the nut is easily loosened due to vibration of the liquid supply motor, etc.

[0012] Background literature

[0013] (Document 1) Patent Registration No. 10-1384508

[0014] The present invention aims to solve the problems of the current technology by preventing reverse rotation from occurring in the screw-structured joint when a part having a screw-structure on one side is screw-connected with a part having a screw-structure on the other side to form a screw-structured joint, thereby preventing the screw-structured joint from becoming loose or the parts from being released / separated from each other.

[0015] Furthermore, the present invention aims to provide a screw structure fastening part that is not permanently maintained in a fastened state and cannot be released / separated, but rather, when a certain reverse rotation force is applied, the reverse rotation prevention structure is released so that the connected parts can be separated from each other.

[0016] Furthermore, the present invention aims to permanently maintain the function of the screw thread structure fastening part by replacing a crushed or broken reverse rotation prevention catch with a washer-type module, so that the screw thread structure fastening part does not remain permanently fastened and cannot be separated, but rather, when a certain reverse rotation force is applied, the reverse rotation prevention structure is released so that the connected parts can be separated from each other.

[0017] In order to achieve the above object, the present invention configures a loosening prevention device, wherein when a bolt part and a nut part made of a polymer resin material are combined with each other to form a threaded structure fastening part, the nut part having a catch jaw receiving part slides over the catch jaw sliding part of the bolt part while rotating in a forward direction, and the catch jaw is positioned and fastened in the catch jaw receiving part, and when an external force of a certain size is applied in a reverse rotation direction, the catch jaw resistance surface of the bolt part passes over the catch jaw receiving part resistance surface of the nut part, and the fastening state of the threaded structure fastening part is released.

[0018] Various configurations and modifications of the present invention are described in detail through the following examples, which are specific contents for carrying out the invention.

[0019] The present invention has the functions and effects described in the purpose of the invention by adopting the above configuration.

[0020] The various functions and effects of the present invention are described in detail through the examples described below.

[0021] Figures 1 to 4 illustrate an anti-loosening device of one embodiment of the present invention.

[0022] Figures 5 to 7 illustrate the screw structure fastening portion of an anti-loosening device of any one of the embodiments of the present invention.

[0023] FIGS. 8 to 12 illustrate some of the side views of the bolt portion and nut portion of one embodiment of the present invention.

[0024] Figures 13 and 14 illustrate the arrangement of a catch formed in a bolt portion of one of the embodiments of the present invention.

[0025] Figure 15 shows a side view and a plan view of a catch formed in a bolt portion of one embodiment of the present invention.

[0026] Figures 16 to 18 illustrate the screw structure fastening portion of an anti-loosening device of any one of the embodiments of the present invention.

[0027] Fig. 19 shows the appearance of a washer-type module according to one embodiment of the present invention.

[0028] FIG. 20 and FIG. 21 illustrate the screw structure fastening portion of an anti-loosening device including a washer-type module, which is one of the embodiments of the present invention.

[0029] Fig. 22 shows the appearance of a washer-type module according to one embodiment of the present invention.

[0030] Figures 23 to 28 illustrate the appearance of a washer-type module according to one embodiment of the present invention.

[0031] Figures 29 to 32 illustrate the screw structure fastening portion of an anti-loosening device including a washer-type module, which is one of the embodiments of the present invention.

[0032] Figures 33 to 42 show photographs of actual molded products related to embodiments of the present invention.

[0033] <Explanation of symbols>

[0034] 100: Anti-loosening device

[0035] 200: Bolt Department

[0036] 201: Jaw 202: Pipe 203: Floor

[0037] 211: Sliding jaw 212: Sliding jaw resistance surface 213: Upper end of the sliding jaw

[0038] 300: Nut part

[0039] 301: Receiving area for the catch 302: Other pipe

[0040] 312: Resistance surface of the catch jaw receiving section

[0041] 400: Screw-in structure fastener

[0042] 500: Washer-type module

[0043] 501: Hook 502: Module fixing hook 503: Module fixing hook receiving portion

[0044] 504: Elastic leg 505: Washer-type module bottom surface

[0045] 506: Upper ring 507: Lower ring 508: Bottom surface of lower ring

[0046] 511: Hook resistance surface 512: Hook resistance surface 513: Hook upper end

[0047] Hereinafter, the present invention will be described in detail through examples. The purpose, features, and advantages of the present invention will be readily understood through the following examples.

[0048] The present invention is not limited to the embodiments disclosed herein and may be embodied in other forms.

[0049] The embodiments disclosed herein are provided to ensure that the spirit of the present invention can be sufficiently conveyed to a person skilled in the art to which the present invention pertains, and should be understood to include all transformations, equivalents, or substitutes included in the technical spirit and technical scope of the present invention.

[0050] Therefore, the present invention should not be limited to the following examples, and it should be understood that all transformations included in the technical spirit and technical scope of the present invention are included.

[0051] That is, a person having ordinary knowledge in the technical field to which the present invention pertains may modify or change the present invention in various ways by adding, changing, deleting or adding components, etc., within the scope that does not depart from the spirit of the present invention described in the claims, and this is also included within the scope of the rights of the present invention.

[0052] Furthermore, the scope of patent rights regarding the method for producing the product described in the embodiments of the present invention is not limited to the case where the product produced by the method is implemented.

[0053] The present invention can be modified in various ways and has various embodiments, and specific embodiments are illustrated in the drawings and described in detail.

[0054] The sizes of elements in the drawings or the relative sizes between elements may be somewhat exaggerated for a clearer understanding of the present invention. Furthermore, the shapes of elements depicted in the drawings may vary somewhat due to variations in the manufacturing process, etc.

[0055] Therefore, the embodiments disclosed in this specification should not be limited to the shapes shown in the drawings unless specifically stated otherwise, and should be understood to include a certain degree of modification.

[0056] Meanwhile, the various embodiments of the present invention may be combined with any other embodiments unless explicitly indicated otherwise. Any feature indicated as being particularly preferred or advantageous may be combined with any other feature or features indicated as being preferred or advantageous.

[0057] That is, the various aspects, features, embodiments or implementations of the present invention may be used alone or in various combinations.

[0058] It should be understood that the terminology used in this specification is for the purpose of describing specific embodiments only and is not intended to limit the scope of the claims. All technical and scientific terms used herein, unless otherwise specified, have the same meaning as commonly understood by one of ordinary skill in the art. The singular expression "a" includes the plural expression unless the context clearly indicates otherwise.

[0059] In describing the present invention, if it is determined that a detailed description of related prior art (known art) may obscure the gist of the present invention, the detailed description is omitted.

[0060] Below, one embodiment of the present invention is described.

[0061] The anti-loosening device (100) of the present invention is an invention to fundamentally prevent the bolt portion (200) and the nut portion (300) from being separated due to vibration or various external environments when the bolt portion (200) and the nut portion (300) are fastened to each other by a screw structure or the like.

[0062] In the description of the present invention, the following definitions of the invention components are specifically provided. However, these are not absolute expressions and are only valid in the description of the present invention. Components of the invention not specifically defined in the present invention should be interpreted and understood with the meanings used in the art by a person skilled in the art.

[0063] In the present invention, the meanings of pipe / tube and pipe are not significantly different, so unless there are special circumstances, the term 'tube' is used uniformly.

[0064] In the present invention, the fittings have various shapes and structures, so the description of the present invention includes all fittings used in the art.

[0065] In the present invention, a bolt portion and a nut portion are connected to each other by a screw thread structure or the like, and are referred to as a 'screw thread structure fastening portion (400)'. This screw thread structure fastening portion should be understood as a special expression in the present invention including all pipes and fittings.

[0066] The purpose of the present invention is to prevent reverse rotation from occurring in the screw structure fastening portion when a part having a screw structure on one side is screw-connected with a part having a screw structure on the other side to form a screw structure fastening portion (400), thereby preventing the screw structure fastening portion from becoming loose or the parts from being separated from each other.

[0067] In the present invention, a part having a screw thread structure on one side is represented as a bolt portion (200) in the description of the invention of the embodiment, and a part having a screw thread structure on the other side is represented as a nut portion (300) in the description of the invention of the embodiment. However, these represent one form of an embodiment of the present invention, and since the screw thread structure is not necessarily a unique structure that only the bolt portion and the nut portion have, the bolt portion and the nut portion as parts having a screw thread structure are considered as an example as an embodiment of the present invention, and the present invention should be understood with this in mind.

[0068] Therefore, the technical idea principle of the present invention can be applied to parts having various screw thread structures other than the structures of the bolt and nut portions illustrated in the description or drawings of the present invention, and the same operation and effect can be exhibited, and the embodiments of the present invention should be understood in consideration of this.

[0069] The purpose of the present invention is not to permanently maintain a screw-structured fastening state and not to separate, but to release the anti-reverse rotation structure when a certain reverse rotation force is applied so that the parts of the fastening part that are connected can be separated from each other.

[0070] The constant reverse rotation force described above varies depending on the size and shape of the screw structure fastening part, but when continuous vibration is applied to the part or a force greater than the external force generally applied is applied, the reverse rotation prevention structure is released due to the characteristics of the polymer resin material, and the parts are separated from each other, and when the parts are reconnected, the reverse rotation prevention structure can be created, so that the purpose and effect of the present invention are again achieved.

[0071] Therefore, the bolt and nut parts of the screw structure fastening part according to the present invention are characterized in that they use polymer resin material rather than metal material.

[0072] The polymer resin material used in the present invention may be any material that functions as a pipe or fitting, and it is preferable that it have a certain durability and processing properties.

[0073] Furthermore, if the substance flowing through the pipe or fitting is a toxic chemical substance, chemical resistance is also required. If the pipe is one through which toxic chemicals flow, it is preferable to use a fluorine-based resin. In order to ensure durability, processability, and chemical resistance, the present invention is characterized by using polytetrafluoroethylene resin or perfluoroalkoxy resin.

[0074] The present invention comprises a loosening prevention device (100) as shown in FIGS. 1 to 9, etc., wherein when a bolt portion (200) and a nut portion (300) made of a polymer resin material are coupled to each other to form a threaded structure fastening portion (400), the nut portion (300) having a catch-jaw receiving portion (301) in the threaded structure fastening portion (400) slides over the catch-jaw sliding portion (211) of the bolt portion while rotating in a forward direction, so that the catch-jaw (201) is seated and positioned on the catch-jaw receiving portion (301) and is fastened, and when an external force of a certain size is applied in a reverse rotation direction, the catch-jaw resistance surface (212) of the bolt portion is passed over the catch-jaw receiving portion resistance surface (312) of the nut portion, thereby releasing the fastening state of the threaded structure fastening portion.

[0075] In the present invention, the catching jaw receiving portion resistance surface (312) of the nut portion does not exceed the catching jaw resistance surface (212) of the bolt portion of the screw thread structure fastening portion until a certain size of external force is applied, due to continuous vibration or a force less than a certain size of external force, so that the screw thread structure fastening portion of the present invention has the effect and function of not being easily released.

[0076] As described above, the screw thread structure fastening part of the present invention is released when a certain amount of external force is applied to the fastening state. However, in reality, once the screw thread structure fastening part is fastened, the fastening state is not frequently released. Therefore, it is important that the screw thread structure fastening part is not easily released due to continuous vibration or continuous weak external force.

[0077] If a screw thread fastening part is to be released due to a certain situation, an external force of a certain size is applied to release the screw thread fastening part. In this process, the resistance surface (312) of the catch jaw receiving part of the nut part may pass over the resistance surface (212) of the catch jaw of the bolt part, causing the upper end (213) of the catch jaw of the bolt part to bend. However, due to the nature of the polymer resin material, unlike metal materials, it has elastic properties, so it does not easily get crushed or broken, but only slightly distorts its shape due to the elastic action and then returns to its original shape. Only a degree of deformation occurs.

[0078] Furthermore, depending on the type of polymer resin material, if the elasticity is good, the upper end of the catch (213) does not easily become crushed or broken, and thus, when releasing and re-releasing the fastening according to the present invention, there is no problem at all, and further, even if released again, it has the same elasticity, so there is an advantage in that the screw structure fastening part of the present invention can be maintained semi-permanently.

[0079] In the present invention, the structure of the catch jaw or the structure of the catch jaw receiving portion can be designed in various ways, but it is preferable to have a structure and form that is easily fastened when rotating forward, has resistance when rotating backward, and when an external force of a certain size is applied in the direction of rotating backward, the resistance surface of the catch jaw passes over the resistance surface of the catch jaw receiving portion, thereby releasing the fastening state of the screw-structure fastening portion.

[0080] That is, the advantage of the present invention is that the technical principle structure of the present invention can be applied to all screw-type structural fastening parts.

[0081] Therefore, if the structure of the catch receiving portion resistance surface (312) corresponding to the catch receiving portion resistance surface (212) is provided, the function and effect of the present invention are generated, and thus, for example, the present invention is not limited to the example of the form as in (a) of FIG. 10, and even if the catch receiving portion (301) is configured in the form as in (b) of FIG. 10, the effect according to the purpose of the present invention is generated.

[0082] Accordingly, among the various embodiments of the present invention, the catch receiving portion can be designed in various ways, such as in (a) or (b) of FIG. 10, depending on the production method or convenience / efficiency. Therefore, the present invention should be understood with the understanding that the description or drawing of the present invention is only an example.

[0083] In the combination of parts having a screw thread structure, there is a structure that is fastened by rotating clockwise and a structure that is fastened by rotating counterclockwise, so the direction of forward rotation can be interpreted in various ways depending on the screw thread structure. However, in the description of the present invention, forward rotation refers to a case where two parts in a screw thread structure rotate in the direction in which they are fastened due to screw thread connection, and reverse rotation refers to a case where they rotate in the direction in which the screw thread connection of two parts is released.

[0084] The drawings according to the present invention depict the rotation direction of the bolt or nut as clockwise rotation, and furthermore, it is necessary to understand the description of the present invention taking into account that in the art, this clockwise rotation direction is usually regarded as clockwise rotation.

[0085] In the present invention, when releasing a screw structure fastening part, an external force of a certain size is applied. However, the size of this force varies depending on the material of the polymer resin or the size and shape of the catch, and therefore cannot be determined at a certain level.

[0086] However, the minimum force is the force that prevents the catch resistance surface (212) from passing over the catch receiving portion resistance surface (312) due to continuous vibration, and when an external force greater than this minimum force is applied, the catch receiving portion (301) and the catch (201) move apart due to the reverse rotation of the screw structure, as can be seen in FIG. 7, and the force that can release the fastening state of the screw structure fastening portion (400) becomes the release-capable external force.

[0087] Referring to Fig. 4, which shows one embodiment of the present invention, an example is shown in which a bolt portion and a nut portion in a one-piece tube structure have a screw-type fastening portion.

[0088] If the fitting has an L-shaped pipe structure, the threaded joints will be in two places instead of one; if it has a T-shaped pipe structure, the threaded joints will be in three places instead of one; and if it has a cross-shaped pipe structure, the threaded joints will be in four places instead of one.

[0089] In the present invention, the catch (201) must basically form a catch resistance surface (212), and thus may have a structure and shape as shown in FIGS. 1 to 3.

[0090] In the present invention, the catch (201) can be formed in a structure and shape in which the catch resistance surface (212) is perpendicular to the bottom surface (203) of the bolt portion (200), as can be seen in Fig. 11, which shows a side cut portion of the catch.

[0091] However, it is not necessary for the catch resistance surface to be formed vertically on the floor surface, and since it is sufficient for the catch resistance surface to perform the catch function of the catch, it may form an angle of about 5 to 10 degrees left and right in the vertical structure, so when the catch resistance surface is viewed from the side as in Fig. 11, the angle (A1) formed by the catch resistance surface (212) line and the floor surface (203) line may be formed between 80 to 100 degrees.

[0092] Next, a catch (201) is formed with a catch sliding portion (211), which is a portion that slides when fastened in a forward rotation, together with a catch resistance surface (212). The structure of the catch sliding portion (211) can be seen in Fig. 12, etc.

[0093] In the present invention, the catch sliding portion (211) can be formed in a structure in which the catch sliding portion (211) has an acute angle (A2) of less than 90 degrees on the bottom surface (203) of the bolt portion, as can be seen in FIGS. 11 and 12, which show the side cut portion of the catch sliding portion.

[0094] In the present invention, the angle (A2) formed by the bottom surface of the bolt portion and the sliding portion of the catch can be set to a value ranging from 40 degrees to 60 degrees, and since the sliding function of the catch during the screw structure fastening process does not interfere with the function of the present invention, an angle of less than 40 degrees or more than 60 degrees can be provided in some cases.

[0095] As can be seen in Fig. 1 and the like, if there is one or more catches in the bolt portion of the screw structure fastening member according to the present invention, the function and effect according to the present invention can be exhibited.

[0096] If the number of catches is too large, the fastening itself may not be possible, and some catches and catch receiving portions may not be accurately combined. Therefore, in the present invention, it is preferable to configure it in the range of 1 to 8, and further, it is more preferable to configure it in the range of 1 to 4.

[0097] If the number of catches is one, the position thereof does not matter much, but as can be seen in FIGS. 1 to 3, 13 and 14, when the bolt section is viewed from above, in the case of two catches, the two catches face each other at an angle of 180 degrees with respect to the origin, in the case of three catches, at an angle of 120 degrees, in the case of four catches, at an angle of 90 degrees, and further, in the case of five to eight catches, at an angle that is evenly divided into equal angles.

[0098] However, it is not limited to arranging them at an angle that is divided equally at a constant angle as above, and in some cases, they may be arranged by pushing them to one side or arranged unevenly. Therefore, in the present invention, the evenly divided arrangement is only one example.

[0099] The nut portion of the screw thread structure fastening part according to the present invention must have a corresponding catch receiving portion in proportion to the size of the catch, as can be seen in FIGS. 1 to 10, etc., and since the fastening is completed only when the catch receiving portion is received while the bolt portion and the nut portion rotate in the screw thread structure fastening part, it may be difficult to accurately seat the catch receiving portion in the catch receiving portion no matter how precisely the screw thread structure of the bolt portion or nut portion is processed or injection-molded, so it is preferable to form 30 to 60 catch receiving portions taking into account a slight gap.

[0100] As described above, it is preferable to form the number of catches of 1 to 8 and the number of catch receiving portions of 30 to 60. However, since the size and structure of the screw-structure fastening portion may vary, it is to be noted in advance that the description of the present invention is merely an example of an embodiment. Accordingly, the implementation of the present invention is not limited to the above number.

[0101] The size of the catch according to the present invention may vary depending on the size of the pipe or fitting and the size of the screw structure fastening portion, but it is preferable to design it not to be too large considering the characteristics of the polymer resin material.

[0102] If the size of the catch is too large, not only will the fastening itself be difficult, but there is also a risk that it may be impossible to release the fastening or that too much force may be required to release the fastening.

[0103] If the size of the catch is too small, it is easy to fasten, but there is a disadvantage that it can be easily released by continuous vibration or weak external force.

[0104] In the present invention, if the catch of the screw structure fastening part has a structure as shown in (a) of Fig. 15 when viewed from the side and (b) of Fig. 15 when viewed from above, considering that it is made of a polymer resin material, it is preferable that the height (H) of the catch, i.e., the height of the catch resistance surface (212), is 1 to 10 mm, the width (W) of the catch is preferably 1 to 10 mm, and the length (L) of the catch is preferably 1 to 10 mm.

[0105] Furthermore, in order to complete the screw structure fastening part by performing forward and reverse rotation with a force that is not too great in the present invention, it may be preferable that the maximum height (H) of the catch is 1 to 5 mm.

[0106] The height, width and length of the above-mentioned catch can be formed smaller or larger depending on the size of the bolt or nut portion, so the structure or shape of the present invention is not limited to these numerical values.

[0107] A pipe or fitting having the shape or form of a screw thread structure fastening part as described above can be manufactured through injection molding. However, the screw thread structure fastening part of the pipe or fitting according to the present invention does not necessarily have to be manufactured through injection molding, and can be manufactured through various polymer resin molding techniques.

[0108] In the present invention, a corresponding catch receiving portion is formed on the nut portion side in proportion to the size of the catch that can accommodate the catch of the bolt portion. The shape of the catch receiving portion can be formed in the same shape and structure depending on the shape and structure of the catch, and can be formed in a constant shape and structure regardless of the shape and structure of the catch.

[0109] If the catch catch receiving portion has the same shape and structure as the catch catch as can be seen in (a) of Fig. 10, a gap of 0.1 to 0.5 mm or more can be formed between the catch catch and the catch catch receiving portion so that the catch catch can be easily accommodated in the catch catch receiving portion.

[0110] Even if the catch receiving portion is formed in a D-shape in cross-section and structure as in (b) of Fig. 10, the catch can be easily accommodated and settled in the catch receiving portion.

[0111] The clearance formed between the above-described catch and catch receiving portion can provide a clearance of 0.1 to 0.5 mm or more between the catch resistance surface (212) and the catch receiving portion resistance surface (312) even when the catch receiving portion is formed in the shape of the letter D with the cross-sectional shape and structure described above.

[0112] Looking at Figures 16 to 18, an example is shown of a bolt portion having two catches formed thereon being combined with a nut portion.

[0113] Fig. 16 shows that two catches (201) are formed in a direction facing each other on a bolt portion (200) coupled with a pipe (202), and Fig. 17 shows that a nut portion (300) coupled with a pipe (302) and a bolt portion (200) coupled with a pipe (202) are coupled to each other to form a screw thread structure fastening portion (400), and Fig. 18 shows a cross-section of Fig. 17.

[0114] Below, another embodiment of the present invention is described.

[0115] By configuring the anti-loosening device (100) in the same manner as the previously described embodiment and forming the screw structure fastening portion (400), a structure can be created in which the bolt portion (200) and the nut portion (300) are combined and have the effect of being released when a certain force is applied.

[0116] However, since the requirements in industrial sites are always changing, there may be cases where it is not necessarily desirable to form a catch (201) of the type shown in FIGS. 1 to 3 in the bolt portion (200).

[0117] That is, in the embodiment form described above, it is assumed that a screw thread structure fastening part is easily formed and released when a certain force is applied in the field, but depending on the situation, there may be cases where a screw thread structure fastening part having a normal bolt part and nut part without a catch (201) is desired.

[0118] In this case, the catch jaw of the bolt part and the catch jaw receiving part of the nut part are both unnecessary configurations, resulting in a configuration that is not required in the field.

[0119] In addition, if a loosening prevention device is configured in an industrial field to form a screw structure fastening part and a constant force is applied to frequently perform fastening and releasing, if a polymer resin with a low elastic modulus is used, the upper end (213) of the catch step may be worn or crushed due to the characteristics of the polymer resin, and if this catch step end is worn or crushed due to the frequent repetition of fastening and releasing, the height (H) of the catch step resistance surface (212) may be lowered, and the screw structure fastening part may be released when not desired due to continuous vibration, etc., and as a result, the loosening prevention device may not function.

[0120] In cases like the above, the entire bolt section must be replaced to maintain the loosening prevention function of the present invention, so this replacement work is not only cumbersome but also requires an enormous amount of cost and time.

[0121] In addition, in chemical plants, it is often impossible to stop the entire process system, and for the above reasons, replacing all bolts and other parts with new ones would cause significant disruption to the operation of the entire process system of the chemical plant.

[0122] Therefore, the present invention is characterized in that, when a screw thread structure fastening part (400) is formed by forming a loosening prevention device (100) and frequently performing fastening and releasing by applying a constant force, and the upper end of the catch plate (213) is worn and crushed, thereby lowering the height of the catch plate resistance surface (212), only the part of the bottom surface (203) of the bolt part (200) where the catch plate (201) is formed is replaced entirely with a new one, thereby maintaining the original function and effect of the present invention described above.

[0123] In order to achieve the above purpose and effect, as shown in FIGS. 19 to 21, a washer-type module (500) including a catch (501), a module catch fixing portion (502), and a module catch receiving portion (503) is formed, and a screw-structure fastening portion (400) that connects a bolt portion (200) and a nut portion (300) is formed through the washer-type module, which is another feature of the present invention.

[0124] The material of the washer-type module according to the embodiment of the present invention is preferably a polymer resin material such as a bolt portion and a nut portion, but is not necessarily limited thereto, and a different type of material from the polymer resin of the bolt portion and the nut portion may be used in consideration of the molding structure.

[0125] That is, this embodiment of the present invention has a feature of further forming a structure capable of accommodating a washer-type module (500) that does not have a self-catching protrusion (201) on the bolt side and instead includes a catching protrusion (501), thereby fixing the washer-type module by settling it.

[0126] Therefore, the following embodiment of the present invention constitutes a loosening prevention device (100), in which when a bolt part (200) and a nut part (300) made of a polymer resin material are combined with each other to form a screw thread structure fastening part (400), a washer-type module (500) that is inserted and fixed into a module fixing receiving part (503) formed on the bottom surface (203) of the bolt part in the screw thread structure fastening part (400) is fixedly seated, and the nut part (300) having the catching jaw receiving part (301) slides over the catching jaw sliding part (511) of the washer-type module while rotating in a forward direction, so that the catching jaw (501) is seated and positioned on the catching jaw receiving part (301) and fastened, and when an external force of a certain size is applied in a reverse rotation direction, the catching jaw resistance surface (512) of the washer-type module is passed over the catching jaw receiving part resistance surface (312) of the nut part, thereby forming a screw thread structure. It is characterized by the release of the fastening state of the fastening part.

[0127] In general, a washer is a round, thin part that is inserted into a bolt and placed under a nut when connecting a bolt or nut. In the present invention, although the shape is not the same as that of a washer, a structure having a module fixing receiving portion (503) is formed on the bottom surface of the bolt portion, and a module having a module fixing receiving portion (502) is called a washer-type module (500), and is characterized in that it completes the screw structure fastening portion of the loosening prevention device of the present invention.

[0128] As shown in Fig. 19, the washer-shaped module according to the present invention has a catching jaw (501) formed on the washer-shaped module bottom surface (505) of the washer-shaped module, and a module catching fixing part (502) formed in a rectangular shape similar to the structure corresponding to the protrusion in the concavo-convex structure formed under the washer-shaped module is inserted and fixed into a module fixing catching receiving part (503) formed above the bottom surface (203) of the bolt part similar to the structure corresponding to the depression in the concavo-convex structure and seated thereon. The bolt part (200) including the washer-shaped module thus seated and fixed is combined with the nut part (300) to form a screw thread structure fastening part (400) as described above.

[0129] In the present invention, since the module catching fixing part (502) of the washer-shaped module (500) can be fixed to the bolt part even if there is only one, in the present invention, it is characterized in that one or more module catching fixing parts are formed in the washer-shaped module.

[0130] If there is one or more module catching fixing parts of the washer-shaped module described above, the functions and effects of the present invention are exhibited. Therefore, if there is one or more module fixing catching receiving parts (503), the functions and effects of the present invention will occur. However, if there is only one module fixing catching receiving part, it may take time to find and combine the position when there is one module catching fixing part. Therefore, the module fixing catching receiving part is characterized in that it is equal to or more than the number of module catching fixing parts.

[0131] Referring to Figs. 19 to 21 showing one embodiment of the present invention, there are two module catching fixing parts, and there are also two module fixing catching receiving parts. The two module catching fixing parts are formed in a structure facing each other at an angle of 180 degrees at the bottom of the washer-shaped module, and it can be seen that the two module fixing catching receiving parts are formed in a structure facing each other at an angle of 180 degrees above the bottom surface of the bolt part.

[0132] In the present invention, the shape of the module hook fixing portion formed at the bottom of the washer-type module is a square when viewed from the side, and the shape of the module fixing hook receiving portion formed on the bottom surface of the bolt portion is a square when viewed from the side, similar to the shape of the module hook fixing portion. Since the module hook fixing portion and the module fixing hook receiving portion having the same shape are fixed in an insert-coupled structure, when the bolt portion and the nut portion are rotated to be fastened or, especially, released, the washer-type module is fixed at the bolt portion and does not move.

[0133] In the embodiment of the present invention, both the module hook fixing portion and the module hook receiving portion have a square shape and structure when viewed from the side. However, since the function of the module hook fixing portion and the module hook receiving portion is to prevent the washer-type module from moving when the bolt portion and the nut portion are rotated to be fastened or released, it is not necessary to have a square shape and structure when viewed from the side, and can be designed in various ways as long as the function is maintained. Therefore, the description of the present invention or examples in the drawings are only one embodiment.

[0134] As described above, the present invention is characterized in that the bolt portion (200) including a fully replaceable hooking function part is connected to the nut portion (300) by inserting and fixing the module fixing hooking portion (502) of the washer-type module (500) into the module fixing hooking receiving portion (503) formed on the bottom surface (203) of the bolt portion (200).

[0135] In the present invention, if one or more module fixing catches (502) are formed on the washer-type module (500), the effect of the ball invention can be exerted by inserting and fixing them into the module fixing catch receiving portion (503). However, since the support force for insertion and fixation may be weak against the rotation of the bolt portion and the nut portion, it is preferable to form two or more module fixing catches (502) and to form two or more module fixing catch receiving portions (503) at positions where they can be inserted and fixed correspondingly. Examples thereof are illustrated in FIGS. 19 to 32, etc.

[0136] Referring to (a) of Fig. 22, it shows that two catches (501) are formed in the washer-type module (500), and referring to (b) of Fig. 22, it shows that four catches (501) are formed. If there are many catches (501), the screw structure fastening part is not easily released due to vibration, etc., which is desirable, but it may not be desirable because a lot of force is required when releasing.

[0137] However, unlike the embodiment described above, the anti-loosening device including a bolt portion having a washer-type module can form a screw-structure fastening part like new again by replacing the washer-type module with a new one when the upper end (513) of the catch is worn or crushed and loses its function, so it is not a big problem that a lot of force is required to release the screw-structure fastening part, and it may be preferable to form more catches than one in the washer-type module in that it is not easily released due to vibration, etc.

[0138] In the present invention, as explained above, if the number of catches is too large, the fastening itself may not be possible, and some catches (501) and the catch receiving portion (301) may not be accurately combined. Therefore, in the present invention, it is preferable to configure it in the range of 1 to 8, and further, it is more preferable to configure it in the range of 1 to 4, but it is not necessarily limited thereto, and it is also possible to form more than 8.

[0139] Of course, it is desirable to form 30 to 60 catch-jaw receiving portions (301) considering a slight gap as explained above.

[0140] The present invention is characterized in that a catch (501) is formed by inserting and fixing a washer-type module into the bolt portion as described above, and a screw-structure fastening portion is completed by rotationally connecting it with a nut portion. In the embodiment in which the catch (201) described in the previous embodiment is formed on the bottom surface (203) of the bolt portion (200), or in the embodiment in which the catch (501) is formed on the bottom surface (505) of the washer-type module (500), when the bolt portion and the nut portion are rotationally connected and the catch (201, 501) are connected with the catch (301) receiving portion as shown in FIG. 7, if one pair of catch and catch receiving portions is connected, the rotation of the bolt portion and the nut portion may stop, and a phenomenon may occur in which further connection of the catch and catch receiving portions does not easily occur.

[0141] That is, the effect of the anti-loosening device such as the present invention is that the rotation occurs a little more or the rotation is slightly forward or backward, so that the catches are all seated and fixed in the catches receiving portions. However, if only some of the catches are seated in the catches receiving portions and the remaining catches are half-hung or not seated in the catches receiving portions, this phenomenon is undesirable for the effect of the anti-loosening device such as the present invention.

[0142] Accordingly, in the present invention, as can be seen in FIG. 23, when a washer-type module is used, the washer-type module (500) is formed by dividing it into an upper ring (506) and a lower ring (507), and a structure is adopted in which the upper ring and the lower ring are connected by an elastic leg portion (504), so that the elastic leg portion receives a force acting between the upper ring and the lower ring and moves elastically to narrow the gap between the upper ring and the lower ring, and as a result, when the bolt portion and the nut portion are rotated and combined, the effect is generated in which the catch portion is completely seated in the catch portion receiving portion and fixed.

[0143] If the structure as above is adopted, the catch (501) is formed on the washer-shaped module bottom surface (505) of the upper ring (506), and the module fixing catch (502) is formed on the lower edge end of the lower ring (507).

[0144] And in the structure above, the upper ring and the lower ring are connected through elastic bridges (504) formed in an oblique direction of the diagonal structure. As can be seen in Fig. 23, etc., there are four elastic bridges between the upper ring and the lower ring.

[0145] In the present invention, the effect of the present invention is achieved when the number of elastic legs is at least two, but considering the stability and mechanical strength of the washer-type module, it is preferable to form four, and it is also possible to form eight, so the illustration of FIG. 23 and the like is one embodiment of the present invention.

[0146] Referring to (a) of Fig. 24, it shows that two catches (501) are formed in a washer-type module (500) including an elastic leg portion (504), and referring to (b) of Fig. 24, it shows that four catches (501) are formed. If there are many catches (501), the screw structure fastening part is not easily released due to vibration, etc., which is desirable, but it may not be desirable because a lot of force is required when releasing.

[0147] However, since the anti-loosening device including the bolt part having the washer-type module including the elastic leg part described above can form a screw-structure fastening part like new again by replacing the washer-type module with a new one when the upper end (513) of the catch is worn or crushed and loses its function, it is not a big problem that a lot of force is required to release the screw-structure fastening part, and it may be preferable to form more catches than one in the washer-type module in that it is not easily released due to vibration, etc.

[0148] The washer-type module including the elastic leg portion has the effect of allowing the catch to be easily settled and received in the catch receptacle by the elastic action of the elastic leg portion, in addition to the clearance of 0.1 to 0.5 mm or more formed between the catch and the catch receptacle as described above.

[0149] Referring to FIGS. 25 and 26, the overall appearance and side view of a washer-type module (500) having four catches (501) formed therein are shown, and in FIG. 27, etc., the elastic leg portion (504) is a connecting support portion having a diagonal shape made of a polymer resin material of the same material as the washer-type module. As can be seen in FIG. 27 (a), when the elastic leg portion serving as the connecting support portion receives force from the upper ring or the lower ring, it can be seen that it narrowly changes from the original height (H1) to the height after fastening (H2) as can be seen in FIG. 27 (b). Examples of such a fastened and combined appearance are shown in FIGS. 29 to 32.

[0150] Of course, if the catch and the catch receiving portion are accurately combined and fastened, there is no need to further rotate the bolt or nut portion to apply more force to the washer-type module as in (a) of Fig. 27. However, if there is a situation where the bolt or nut portion must be further rotated to ensure accurate fastening, a method of slightly more rotation can be used to ensure accurate combination of the catch and the catch receiving portion.

[0151] Furthermore, when the elastic bridge receives force from the upper ring and the lower ring, force is generated toward the nut part due to the elastic action, so that the catch (501) is further settled and fixed in the catch receiving portion of the nut part, thereby generating a force for fastening and joining.

[0152] In addition, as above, when the catch (501) is secured and fixed in the catch receiving portion of the nut and the fastening is released, the washer-type module may be pushed slightly downward due to the elastic action, thereby causing the fastening to be released.

[0153] The elastic leg portion (504) of the washer-type module as above is symmetrically formed with the same structure and shape, and is formed obliquely in a diagonal shape so that when the upper ring and the lower ring are forced, the gap between the upper ring and the lower ring is elastically narrowed so that the catch and the catch receiving portion are precisely combined to fasten them. As can be seen in FIG. 28, this obliquely formed structure can be formed so that when the upper ring and the lower ring are not forced, the angle (A3) formed by the bottom surface (508) of the lower ring and the elastic leg portion (504) is 140 to 160 degrees, but is not necessarily limited to this angle, and is characterized in that it can be designed in various ways within a range in which the bottom surface of the lower ring and the elastic leg portion are not perpendicular.

[0154] In the embodiment of the present invention, the material of the elastic leg portion is the same as the material of the entire washer-type module, including the upper ring and the lower ring, and further, the material of the washer-type module including the elastic leg portion is preferably the same as the polymer resin material of the bolt portion and the nut portion, but is not necessarily limited thereto, and a different type of material from the polymer resin of the bolt portion and the nut portion may be used in consideration of the molding structure.

[0155] Below, another embodiment of the present invention is described.

[0156] In the present invention, a fitting having a screw-structured fastening portion can be formed by combining a bolt portion and a nut portion as described above, but ultimately, this fitting must be combined with another pipe to complete the overall pipe structure.

[0157] Since the size and shape of the pipes are all different throughout the entire pipe process, it is difficult and undesirable to individually manufacture the size and shape of the fittings to match them.

[0158] Therefore, a method is needed to effectively connect fittings having a threaded structure by combining a bolt and a nut to another pipe. It may be desirable to form a threaded structure at the ends of the bolt and the nut to connect them with the threaded structure of another pipe, but since the sizes of each pipe are all different, this method of connection has limitations.

[0159] Therefore, the present invention is characterized in that a fitting having a threaded structure fastening portion is formed by combining a bolt portion and a nut portion that can be combined with a widely used standard-sized pipe, and the fitting is combined with another pipe made of a polymer resin material by fusion bonding, thereby forming the entire pipe process.

[0160] That is, the present invention is characterized in that the bolt portion and the nut portion are joined by fusion bonding the ends of the bolt portion and the nut portion in a fitting having a screw structure fastening portion by combining the bolt portion and the nut portion with the accessories of the other pipe (202, 302).

[0161] The fusion bonding technology can use a known fusion bonding technology, and the fittings and pipes having a threaded structure fastening part by combining a bolt part and a nut part can be made of the same polymer resin material, or can be made of different polymer resin materials. If the materials are capable of being fusion bonded, they can be bonded to each other using the fusion bonding technology according to the present invention.

[0162] For example, fusion bonding can be performed by setting fittings and pipes having a threaded structure by combining a bolt and a nut portion in a fusion machine (e.g., fixing a clamp), checking the spacing and angle, then advancing a preheated hot plate to heat each part, then advancing the hot plate, and then fusion bonding can be performed.

[0163] Below, another embodiment of the present invention is described.

[0164] Looking at the attached drawings, actual molded products according to certain embodiments of the present invention are shown in FIGS. 33 to 42, and it can be seen that the various embodiments of the present invention described above were not just imaginary designs, but were actually completed through injection molding and fusion bonding techniques.

[0165] Therefore, it goes without saying that a person skilled in the art can easily and variously practice the present invention by referring to the description of the invention described above and the attached drawings.

[0166] The present invention is an invention that can be industrially applied as a loosening prevention device.

Claims

1. In the anti-loosening device (100), A loosening prevention device characterized in that when a bolt portion (200) and a nut portion (300) made of a polymer resin material are combined with each other to form a screw thread structure fastening portion (400), the nut portion (300) having a catch jaw receiving portion (301) slides over the catch jaw sliding portion (211) of the bolt portion (200) while rotating in a forward direction, so that the catch jaw (201) is positioned and fastened to the catch jaw receiving portion (301), and when an external force of a certain size is applied in a reverse rotation direction, the catch jaw resistance surface (212) of the bolt portion is passed over the catch jaw receiving portion resistance surface (312) of the nut portion, so that the fastening state of the screw thread structure fastening portion is released.

2. In the anti-loosening device (100), A loosening prevention device characterized in that when a bolt portion (200) and a nut portion (300) made of a polymer resin material are combined to form a screw thread structure fastening portion (400), a washer-type module (500) is inserted and fixed into a module fixing receiving portion (503) formed on the bottom surface (203) of the bolt portion in the screw thread structure fastening portion (400), and the nut portion (300) having the receiving portion (301) slides over the receiving portion (511) of the washer-type module while rotating in a forward direction, so that the receiving portion (501) is positioned and fastened to the receiving portion (301), and then when an external force of a certain size is applied in a reverse direction, the receiving portion (312) of the receiving portion of the nut portion passes over the receiving portion resistance surface (512) of the receiving portion of the washer-type module, thereby releasing the fastening state of the screw thread structure fastening portion.

3. An anti-loosening device according to any one of claims 1 and 2, characterized in that the polymer resin is either a polytetrafluoroethylene resin or a perfluoroalkoxy resin.

4. A loosening prevention device according to claim 1, characterized in that the number of catches (201) of the bolt portion is formed from 1 to 8.

5. A loosening prevention device characterized in that, in any one of claims 1 and 2, the number of catch-receiving portions of the nut portion is formed in 30 to 60.

6. A loosening prevention device according to claim 2, characterized in that the number of catches (501) of the washer-type module is formed from 1 to 8.

7. A loosening prevention device according to claim 1, characterized in that the height of the catch (201) of the bolt portion is 1 to 10 mm.

8. A loosening prevention device according to claim 2, characterized in that the height of the catch (501) formed in the washer-shaped module is 1 to 10 mm.

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