JP4674243B2 - Fastening device between two components and fastening method thereof - Google Patents

Description

  The present invention relates to a fastening device and a fastening method between components in an injection molded product or the like, and more specifically, a fastening device that fastens cross-sectional raised portions such as screws provided on the components by frictional engagement with each other. And a fastening method.

  Conventionally, in various containers, a screw is generally used as a fastening method in the technical field of fixing two constituent members that fasten a lid to the container. However, recently, there has been a demand for more stable fastening and multi-functionality.

  In general, the screw type fastening method differs depending on the purpose of use, but the lead angle of the screw to be fastened is mainly used. When this method is employed for a container lid or the like, the inner ceiling surface of the lid and the mouth flat surface of the container are fastened by screws having a constant lead angle. In manufacturing such containers and lids, for example, when releasing a product from a core of an injection mold, the core is rotated to eject the product, so that the die can be easily removed. A screw having a constant lead angle is used.

  In addition, as a method of fastening two members using two types of screws having different lead angles, there is a fastening method as described in Patent Document 1, but each member has a different lead angle depending on each type of lead angle. The moving speed is made different.

Further, as described in Patent Document 2, as a bolt and nut fastening tool, a left screw groove and a right screw groove having different lead angles are formed on one bolt, and the lead angle of each bolt is changed. Some are provided with separate nuts having threads threaded into the thread grooves.
JP 2002-34650 A Japanese Utility Model Publication No. 5-1010

  In such a conventional fastening device, when a screw is used as the fixing means, the lead angle of the screw is generally constant. Therefore, since the fastening force is obtained by elastic deformation and frictional force of the male screw and the female screw regardless of the material, a large rotational moment is required to obtain a strong fastening force. Therefore, there is a problem that the fastening force is influenced by the strength of the tightening rotation force of the lid such as the container, and the lid is easily loosened.

  In particular, the tightening rotational force of the lid is the frictional force between the lid internal ceiling surface and the container mouth plane because the rotational force applied after the inner ceiling surface of the lid and the container mouth plane contact each other contributes to the fastening force. The large loss of the lid rotational force increases the variation in fastening force.

  In addition, fixing with a screw having one type of lead angle always requires a stopper at the end, as in the relationship between bolts and nuts, containers and lids. Limited. Therefore, bolts and nuts as described in the above cited reference 2 are considered, but they require very special processing, and their materials are also required to be strong. Therefore, the processing is difficult.

  In addition, as a fastening device using screws having different lead angles, there is a fastening device using screws as described in the above cited reference 1, but two types of screws having different lead angles are arranged in parallel. The convenience of handling was improved by the difference in speed when moving, and it was not intended for fastening itself.

  The present invention has been made in view of the problems as described above, and an object thereof is to provide a fastening device and a fastening method capable of performing fastening between two constituent members by one operation without providing a special mechanism. And

  The present invention also provides an elastic deformation of the male screw and the female screw by using a screw using at least two kinds of angles as the lead angle of the screw in the case of using the screw among the means for fixing the two. An object of the present invention is to provide a fastening device and a fastening method between two constituent members that can stabilize a fastening force by obtaining a fastening force only by a frictional force and that can be fastened at an arbitrary place.

  The fastening device between two component members according to the present invention has one component member provided with a cross-sectional ridge portion having a predetermined lead angle on the outer periphery, and a lead angle equal to the cross-section ridge portion of the one component member. It consists of the other structural member which provided the cross-sectional raised part in the inner periphery. Another cross-section ridge having a lead angle different from the lead angle of the cross-section ridge is provided on either the outer periphery of one component or the inner circumference of the other component. In both constituent members, the cross-section ridges having the same lead angle are screw-coupled to each other, while any cross-section ridge having a predetermined lead angle is the same as the cross-section ridge and lead angle having the same lead angle. One component member and the other component member are pressure-bonded by being screwed and moved while being pressed between the protruding portions having different cross-sections, and the two component members are fixed together and sealed. It becomes a state.

  Further, when one component member is a container body and the other component member is a lid, the cross-sectional ridges having the same lead angle are screwed together in both component members, while a predetermined lead angle is set. One of the ridges having a cross-section is screwed between the cross-section ridge having the same lead angle and the cross-section ridge having a different lead angle while being press-fitted and frictionally engaged. The mouth of the main body is crimped to the ceiling inner wall of the lid and is in a sealed state.

  Furthermore, at the time of friction engagement, the cross-sectional ridges of one component member having the same lead angle and the cross-section ridges of the other component member may be engaged in a surface contact state.

  In the fastening method between two constituent members according to the present invention, the cross-sectional ridges having the same lead angle in both constituent members are screwed together, and the cross-sectional ridges having a predetermined lead angle are different from the lead angles. The other cross-sectional raised portions are frictionally engaged with each other, and the one component member and the other component member are pressure-bonded to fix both the component members together to form a sealed state.

  In the fastening device between two constituent members having the above-described configuration, one constituent member includes at least two cross-sectional ridges having a predetermined lead angle, and the other constituent member has a predetermined position with respect to the one constituent member. At least one cross-sectional bulge that is held in engagement with and opposite the cross-sectional ridge of one component and that has a lead angle different from the lead angle of the cross-sectional ridge of one component When the two structural members are moved relative to each other, the cross-sectional raised portions are engaged with each other after being moved by a distance facing each other, and further moved while being engaged. However, it is possible to hold the state by frictional engagement more strongly and to fix both components together. At that time, if the engagement location is arbitrarily set to the optimal location, the fastening state of both components according to the application can be obtained.

  Further, the constituent members in the fastening device are an open end portion in a cylindrical container such as a bottle and a lid for closing the open end portion, and a cross-sectional bulge in which the cross-sectional ridge portion is formed on the outer periphery of the open end portion , And a ridge-like section formed on the inner periphery of the lid, so that the lid can be mounted by screwing into the open end of the container. Since the lead angle is different from the cross-section raised portion of the inner wall of the cover and the lid, the threads are engaged after moving each other, and by further continuing the screwing work, friction engagement is performed, Once in a fixed state, the lid can be fastened to the open end of the container.

The fastening device between two component members of the present invention comprises a first cross-sectional raised portion and a second cross-sectional raised portion having a first lead angle different from the lead angle of the first cross-sectional raised portion. One component member provided on one of the outer periphery and the inner periphery;
The second lead angle different from the first lead angle, the third cross-sectional ridge-shaped portion, the other constituent member provided on the other of the outer periphery and the inner periphery,
In both the constituent members, the second lead angle surface of the third cross-sectional raised portion and the first lead angle surface of the second cross-sectional raised portion are in contact with each other, 3 ridges of the cross section are screwed and frictionally engaged while being press-fitted between the first ridges of the first cross section and the second ridges of the second cross section. The other component member is pressure-bonded, and both the component members are fixed together and are in a sealed state.

The fastening device between two component members of the present invention comprises a first cross-sectional raised portion and a second cross-sectional raised portion having a first lead angle different from the lead angle of the first cross-sectional raised portion. One component member provided on one of the outer periphery and the inner periphery;
The second lead angle different from the first lead angle, the third cross-sectional ridge-shaped portion, the other constituent member provided on the other of the outer periphery and the inner periphery,
In both the constituent members, the second lead angle surface of the third cross-sectional raised portion and the first lead angle surface of the second cross-sectional raised portion are in contact with each other, The three cross-sectional ridges are screwed in while being press-fitted between the first cross-section ridges and the second cross-section ridges, and are frictionally engaged so that both components are fixed together. Is done.

The fastening method between two component members of the present invention includes a first cross-sectional raised portion and a second cross-sectional raised portion having a first lead angle different from the lead angle of the first cross-sectional raised portion. One component provided on one of the outer periphery and the inner periphery, and the other configuration provided with a third cross-sectional raised portion having a second lead angle different from the first lead angle on the other of the outer periphery and the inner periphery Fasten the parts, and
In both the constituent members, the second lead angle surface of the third cross-sectional raised portion and the first lead angle surface of the second cross-sectional raised portion are brought into contact with each other, and the third The cross-sectional ridges are screwed and moved while being press-fitted between the first cross-section ridges and the second cross-section ridges, and both components are fixed together. .

  As is clear from the above description, the fastening device provided with the cross-sectional raised portions having various lead angles according to the present invention can be fastened with a small rotational force and can stably obtain the fastening force. For example, the quality of the fastening device can be improved.

  Moreover, since the other structural member can be fastened to an arbitrary place with respect to one structural member, it can be made versatile and the application range can be expanded by fastening with a simple method.

  Hereinafter, an embodiment of a fastening device according to the present invention will be described with reference to the drawings. In the embodiment of the present invention, an open end portion of a container as provided as an injection molded product and a lid screwed on the container will be described, but the cross-sectional ridges having different lead angles are engaged. If it is a fastening device by a thing, it will not be limited to this.

  FIGS. 1 and 2 show the case where cross-sectional raised portions 12, 14, 16, 18 and 22, 24, 26, 28 are provided on one component member 10 and the other component member 20 in a case where the application is not specified. The fastening device is shown. Both the constituent members 10 and 20 are made of an elastic material such as a resin. FIG. 1A shows a state in which both the constituent members 10 and 20 are detached, and FIG. FIG. 1C shows a state in which the cross-sectional ridges are moved to a state where they are engaged with each other, and FIG. Shows the state. As described above, the two structural members 10 and 20 are held at positions where they can move a predetermined distance from each other and can be separated from each other. In that case, the cross-sectional ridges 12, 14, and 22, 24 of both components 10, 20 are engaged with the cross-section ridges 14, 18 having a 18.5 ° lead angle of one component 10. The lead angle of the cross-section ridges 24, 28 in the component member 20 is 20 °, and the other cross-section ridges 12, 16 are cross-section ridges 22, 24, 26, 28 of one component member 20. And having the same lead angle of 20 °.

  As shown in FIG. 1 (B), the two constituent members 10 and 20 are separated from the disengaged state of FIG. 1 (A), and the cross-sectional raised portions 12, 14, 16, and 18 and the cross-sectional raised portions 22, 24, 26, 28 are slid to each other in the lead angle direction, are positioned in an engaged state, are held in a predetermined positional relationship, and can be brought into a fastening state as shown in FIG. It is composed of. Then, the cross-sectional ridges 12, 22 and 16, 26 having the same lead angle are engaged until both the constituent members 10, 20 are assembled and mounted and the cross-sectional ridges 14, 24 having different lead angles are engaged with each other. Is slid and moved. Further, the two ridges 14 and 24 having different lead angles are held so that the constituent members 10 and 20 maintain a predetermined positional relationship by the sliding relationship between the ridges 12 and 22 having the same lead angle. Therefore, the two structural members 10 and 20 are fastened at the positions as shown in the sectional view of FIG. Can be fixed.

  In this fastened state, the cross-sectional ridges 22 and 26 of the other component member 20 slide along the cross-section ridges 12 and 16 of one component member 10 to move the two component members 10 and 20 to each other. When the ridges 14, 18 and 24, 28 having different lead angles are engaged and slid, the ridges 24, 28 of the other component member 20 are of the lead angle of one component 10. The small cross-section ridges 14 and 18 can enter while being elastically deformed with each other, and can be strongly pressed against each other to be brought into a fastening state by friction engagement. As shown in FIG. 2 which is a cross-sectional view taken along the line II-II in FIG. 1C, the engagement state by the elastic deformation of the cross-section raised portions 14, 18 and 24, 28 is shown in FIG. In C), the deformed portions 14 ', 24' and 18 ', 28' indicated by bold lines are shown to show the deformation, and the fastening state can be achieved.

  The above-described fastening device between two component members according to an embodiment of the present invention includes, as an actual example, a screw-type container lid 1 in an injection-molded product as shown in FIGS. The container of the injection-molded product that is closed using the lid 1 is formed on the inner part of the lid body 2 as shown in the development view of FIG. Screws 3a and 3b having lead angles are formed. The lid 1 is fastened to the container body 5 by the screws 3a and 3b.

  FIG. 4 is a developed view showing the screw part 3 of the lid 1 of the container shown in FIG. It has screws 3a and 3b having one type of lead angle. In the screw portion 3, female screws 3 a and 3 b having a lead angle of 20 degrees are arranged on the lid body 2. The female screws 3a and 3b are usually provided by being arranged 4 to 8 on the circumference.

  FIG. 6 is a development view of the screw portion 4 having two types of male screws 41 and 42 having different lead angles according to the present invention. This screw portion 4 is shown in a plan view of the mouth portion of the container main body 5 in FIG. 7, a sectional view in the axial direction of the container main body 5 in FIG. 8, and a sectional view taken at right angles to the lead direction of the male screw 41. As described above, the male screw 42 having a lead angle of 18.5 degrees, which is slightly different from the male screw 41 having a lead angle of 20 degrees, is arranged on the container lid main body 5. These male screws 41 and 42 are usually arranged in the circumference of 4 to 8 pieces. The male screws 42 having different lead angles are generally preferably arranged alternately when a large number of male screws 42 are provided. Therefore, an even number of 4-8 or more screws may be provided depending on the application.

  Further, the angle difference between the two types of lead angles may be about 1 to 2 degrees, but outside this range may be adopted depending on the application. Although not shown in FIGS. 3 to 9, both the male screw side of the container and the female screw side of the lid, etc. are the same in the lead angle and the number of screw threads except for the screw having a different lead angle on the male screw side. Things are provided.

  The relationship between the container and the lid as described above will be described with reference to FIGS. 10 to 14 in the embodiment of the lid having a circular cross section and the mouth of the container. In this case, the same reference numerals are given to the parts equivalent to those shown in FIGS.

  As shown in FIG. 10, at the mouth portion of the cylindrical container body 5 made of an elastic material such as resin, a screw portion 4 consisting of a plurality of male screws 41, 42 is formed on the outer peripheral wall, and these screws are Every other male screw 41 having a lead angle difference of 1-2 ° with respect to each other is provided. The crown-shaped lid 1 is covered with the mouth of the container body 5 so that the inner peripheral wall has the same number of female threads 42 as the male thread 42 on the container body 5 side and the same lead angle, and a plurality of female screws. 3a and 3b are formed.

  From the state in which the lid 1 is detached from the container body 5 as shown in FIG. 10, until the female screw 3a of the lid 1 is engaged with the male screw 41 having a small lead angle as shown in FIG. Screwed. At this time, the female screw 3 a of the lid 1 slides along the screw surface with respect to the male screw 42 of the container body 5, and this engagement is maintained while maintaining the positional relationship between the lid 1 and the container body 5. The state can be maintained. The state immediately before this engaged state is shown in FIG. 13 which is a cross-sectional view taken along line XIII-XIII in FIG. However, on the entrance side of the female screw 3a, the slope portion of the male screw 42 is already in a sliding relationship, and the end portion of the slope portion of the male screw 41 is in a position immediately before the engagement.

  When the lid 1 is further screwed in, as shown in FIG. 12, the female screw 3a of the lid 1 is engaged with the end portion of the inclined surface of the male screw 41 having a small lead angle of the container body 5, and then bent or press-fitted and deformed. As shown by the oblique lines in FIG. 12, while being elastically deformed, the screwing movement by rotation is continued until it is crimped to the mouth of the container body 5 while being deformed, and the lid 1 and the container body 5 are sealed. Thus, frictional engagement is obtained. The engagement state at that time is as shown in FIG. 14 which is a cross-sectional view taken along line XIV-XIV in FIG. 12, and one inclined surface portion of the female screw 3 a of the lid 1 is formed by the male screw 41 of the container body 5. The state is obtained by press-fitting into the slope. Further, as shown in FIG. 14, the other inclined surface portion of the female screw 3a is engaged with the inclined surface portion of the adjacent male screw 42 in the surface contact state because the lead angle is the same. In such a press-fit state between the screws, a strong pressure-bonded state is obtained, and the lid 1 and the container body 5 can be fastened. At that time, the inner wall of the ceiling of the lid 1 can be crimped to the mouth of the container body 5 by screwing, so that strong sealing can be provided when sealing is necessary.

  Such a lid 1, container 5, etc. can be obtained by injection molding. However, in the injection molding die for that purpose, the screw part 3 of the lid 1 is the core side. It can be processed with a processing machine. Since the mold for the container 5 is a mold such as blow molding, a split mold is used, so that the product can be easily processed in the same manner. In addition, the eject after molding can easily take out the product to break the mold, and therefore can be easily released.

  As described above, when the container and the lid screw are engaged and rotated, since the screws having different lead angles are provided, the fastening is started with a slight rotation. Since the fastening principle is wedge-shaped fastening, all the rotational forces of the lid become fastening forces, and stable fastening is possible.

  Further, since the fastening is made by elastic deformation and frictional force between the male screw and the female screw, the male screw can be made into a rod shape, and the female screw side made into a ring shape, for example, can be fastened at any place.

  In the above embodiment, the lid of the container has been described as an example. However, in the case where the fastening as described above is required, it is also applied to various industrial appliances such as home appliances, OA equipment, cameras, and automobiles. It is applicable and is not limited to general household products.

  Moreover, although the cross-sectional raised portion, that is, the lead angle of the screw has been described in the case of having two types of lead angles, the one provided with the cross-sectional raised portion having any number of types of lead angles should be applied. Is possible.

1 shows a fastening device for two component members according to an embodiment of the present invention, (A) is a plan view showing a disengaged state, (B) is a plan view showing an engaged state in the middle of both component members, and FIG. ) Is a plan view in which both constituent members are in a fastened state. FIG. 2 is a side view taken along line II-II in FIG. Sectional drawing of the lid | cover of the screw-type containers which are the injection molded products by other embodiment of this invention. Explanatory drawing of the screw part of the injection molded product of FIG. Sectional drawing of the screw part of FIG. The front expanded view of the container opening part of the injection molded product by other embodiment of this invention. FIG. 7 is a partial plan view of the container mouth portion of FIG. 6. FIG. 7 is a partial cross-sectional view along the central axis of the container mouth portion of FIG. 6. Sectional drawing orthogonal to the longitudinal direction of the external screw in the container opening part of FIG. The perspective view of the container opening part and its cover of the injection molded product by other embodiment of this invention. The perspective view which shows the lid | cover which is going to be mounted | worn with the container opening part of FIG. The perspective view which shows the state with which the lid | cover was mounted | worn and fastened to the container opening part of FIG. Sectional drawing along line XIII-XIII of the step which a lid | cover is going to mount | wear with the container opening part of FIG. Sectional drawing along line XIV-XIV of the state in which the lid | cover of the container mouth part was fastened.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Injection-molded lid product 2 Lid main body 3 Screw part 4 Screw part 5 Container main body 10 One structural member 12, 16 Cross-sectional ridge-shaped part 14, 18 Cross-sectional ridge-shaped part with different lead angles 20 Other component member 22, 24 , 26, 28 Cross-section raised portion 41, 42 Male screw 14 ', 24' Deformed portion 18 ', 28' Deformed portion 3a, 3b Female screw

Claims (8)

One component member provided with a cross-sectional raised portion having a predetermined lead angle on the outer periphery;
It consists of the other component member provided with a cross-sectional ridge-shaped portion having a lead angle equal to the cross-sectional ridge-shaped portion of this one component member on the inner periphery,
On one of the outer periphery of the one component member or the inner periphery of the other component member, another cross-sectional raised portion having a lead angle different from the lead angle of the cross-sectional raised portion is provided,
In both the components, the cross-sectional ridges having the same lead angle are screw-coupled to each other, while any cross-section ridge having the predetermined lead angle is a cross-sectional ridge having the same lead angle The one component member and the other component member are pressure-bonded by being screwed and moved to be frictionally engaged with each other while being press-fitted between the cross-section ridges having different lead angles, and the two component members are integrated with each other. To be fixed and sealed,
Fastening device between two components characterized by this. The one constituent member is a container body,
The other constituent member is a lid,
In both the components, the cross-sectional ridges having the same lead angle are screw-coupled to each other, while any cross-section ridge having the predetermined lead angle is a cross-sectional ridge having the same lead angle By screwing and moving between the ridges of the cross-section with different lead angles, and by frictional engagement, the mouth of the container body is crimped to the ceiling inner wall of the lid and is in the sealed state. ,
The fastening device between two component members according to claim 1.   The cross-sectional ridge-shaped portion of the one component member having the same lead angle and the cross-sectional ridge-shaped portion of the other component member that have the same lead angle are engaged in a surface contact state during the friction engagement. Or the fastening apparatus between the two structural members of Claim 2. With respect to one component member having a cross-sectional raised portion having a predetermined lead angle and another cross-sectional raised portion having a lead angle different from the cross-sectional raised portion on the outer periphery, the predetermined lead angle is set to A method of fastening the other component member having a cross-sectional ridge having the same lead angle as the cross-sectional ridge having
In each of the structural members, the cross-section ridges having the same lead angle are screwed together, and the cross-section ridge having the predetermined lead angle and the other cross-section ridges having different lead angles rub against each other. Engaging, the one component member and the other component member are pressure-bonded, and the two component members are fixed together and sealed.
A fastening method between two constituent members characterized by the above. One of the first cross-sectional ridge and the second cross-sectional ridge having a first lead angle different from the lead angle of the first cross-sectional ridge is provided on one of the outer periphery and the inner periphery. Components,
The second lead angle different from the first lead angle, the third cross-sectional ridge-shaped portion, the other constituent member provided on the other of the outer periphery and the inner periphery,
In both the constituent members, the second lead angle surface of the third cross-sectional raised portion and the first lead angle surface of the second cross-sectional raised portion are in contact with each other, 3 ridges of the cross section are screwed and frictionally engaged while being press-fitted between the first ridges of the first cross section and the second ridges of the second cross section. The other component member is pressure-bonded, and both the component members are integrally fixed and sealed.
Fastening device between two components characterized by this. One of the first cross-sectional ridge and the second cross-sectional ridge having a first lead angle different from the lead angle of the first cross-sectional ridge is provided on one of the outer periphery and the inner periphery. Components,
The second lead angle different from the first lead angle, the third cross-sectional ridge-shaped portion, the other constituent member provided on the other of the outer periphery and the inner periphery,
In both the constituent members, the second lead angle surface of the third cross-sectional raised portion and the first lead angle surface of the second cross-sectional raised portion are in contact with each other, The three cross-sectional ridges are screwed in while being press-fitted between the first cross-section ridges and the second cross-section ridges, and are frictionally engaged so that both components are fixed together. Being
Fastening device between two components characterized by this. The fastening device between two constituent members according to claim 5 or 6, wherein a difference between the first lead angle and the second lead angle is 1 to 2 °. One component having a first cross-sectional raised portion and a second cross-sectional raised portion having a first lead angle different from the lead angle of the first cross-sectional raised portion on one of the outer periphery and the inner periphery And a fastening method between two constituent members for fastening a third cross-sectional raised portion having a second lead angle different from the first lead angle to the other constituent member provided on the other of the outer periphery and the inner periphery. There,
In both the constituent members, the second lead angle surface of the third cross-sectional raised portion and the first lead angle surface of the second cross-sectional raised portion are brought into contact with each other, and the third The cross-sectional ridges are screwed and moved while being press-fitted between the first cross-section ridges and the second cross-section ridges, and both components are fixed together. thing,
A fastening method between two constituent members characterized by the above.

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