JP2018017360A - Rotary joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary joint enabling a possibility of more free development in design to be attained and a total design giving more emotional feeling inclusive of function or performance aspects that match to preferences or needs of purchasing groups can be easily attained.SOLUTION: This invention comprises a pair of semi-spheres 2A having several lever fixing holes 4 at a partial arc surface 6 along an axis line in a radial direction and a fixing ring 3A set among these pairs of bottom surfaces 7 and buried in relative rotatable manner with respect to each of the semi-spheres 2A while a virtual center line S passing through a center of the bottom surfaces 7 and a center line S1 is coincided to each other. A relative rotating attitude of both semi-spheres 2A can be freely changed over 360 degrees and a protruding direction of the lever 5 can be easily and freely changed only by rotating the semi-spheres 2A and additionally as the lever 5 is fitted by a proper selection of several lever fixing holes 4, thus it is possible to attain a product showing various versatile designs.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotary joint, mainly a rack, a table, a bench, furniture such as a chair, or a rotary joint used for a structure such as a jungle gym.

  Conventionally, taking furniture, such as a chair, for example, a leg member, a backrest, a square member or a plate member forming a seating surface, and directly joining the end surfaces with screws, nails, an adhesive, or a joint. (See Patent Documents 1 and 2 and FIG. 9). As for the table, the ends of the leg members, the penetrating holes, the braces, and the like are directly joined to the top plate using screws, nails, an adhesive, and a joint (see Patent Document 3).

  Therefore, whether it is a chair, furniture such as a table, or other structures, the shape and dimensions of the constituent members are determined in advance, and the finished product is only a single design. In order to make a different design, it is necessary to measure the size of each component according to the design and obtain the component, and then assemble the component. The component used in one design can be configured into another design. In general, it cannot be diverted to a member.

  By the way, when thinking about manufacturing in recent years, every product is inorganic, from general mass production type product development that does not feel its characteristics, to multi-product low-volume production, so-called value-added product development, product development environment and production The environment is changing dramatically. In the development of mass-produced products, which has been the mainstream so far, development cost, production cost, and price are important factors, and as an adverse effect of the OEM-type production form, superiority in global competitiveness cannot be maintained. It was also difficult to differentiate. In addition, the fact that goods are available at low prices and abundantly, and there are few inconveniences to goods, gives buyers some sense of joy. On the other hand, however, in recent years, the current situation is that there are many cases of negative consumption, especially that even if a product is purchased and a product is purchased, it is newly purchased because it is damaged. Under such circumstances, there is also a phenomenon in which products that are attractive, highly useful and excellent in design cause new demand. This phenomenon is considered to be a proof that there is a strong demand for total design that gives more excitement, including functions and performance aspects that match the preferences and needs of the buyers. .

JP 07-213370 A Utility Model Registration No. 3071105 JP 2000-325148 A JP 2007-1000048 A2

The present inventor examines the current state of manufacturing with the above-mentioned conventional technology in various ways, and includes the functions and performance aspects that match the preferences and needs of the purchasing layer that have been particularly demanded in recent years. Resin ball joints have been proposed and widely used to connect string materials in a three-dimensional truss structure when searching for the possibility of more flexible development of the design based on the desire for total design that will impress you. I came up with the fact that it was realized (see Patent Document 4 above). The primary reason for using a ball joint as a contact point for a three-dimensional truss structure is to reduce weight and improve workability when manufacturing the truss structure. By incorporating this idea into furniture and other structures, I thought that the possibility of design development could be opened up, and I simply adopted a ball joint as a contact point of the chair on a trial basis. The used ball joint is a resin sphere that is substantially the same as that shown in Patent Document 4 and has a plurality of holes for connecting the flanges around it. A chair was experimentally manufactured using the ball joint of the resin sphere. As a result, we were able to obtain a variety of designs compared to the previous ones, and at first we were convinced, but we found the following problems. In other words, even if considering the size of the sphere, the number of holes for connecting the brazing material provided around the sphere is limited to 3 to 4, and the connecting direction of the brazing material is newly fixed. I found out. As a result, even though it was a variation, the present inventors were not yet satisfied.

  Therefore, as a result of various examinations of new facts found in the process of the above-described trial manufacture, the present invention does not fix the direction of the brazing material protruding from the joint by adding means for changing the connecting direction of the brazing material to the sphere. It is possible to make the design more variable, and the possibility of more flexible development of the design can be obtained, and it is a total that gives more excitement, including functions and performance aspects that match the tastes and needs of the buyers. We have been able to provide a rotary joint that is easy to obtain a design, so we propose it here.

  Therefore, the object of the present invention is to create a total design that gives more excitement, including functional and performance aspects that match the preferences and needs of the purchaser, and the possibility of more free development of the design is obtained. The object is to provide an easily obtainable rotary joint.

  In order to achieve the above object, in the rotary joint of the present invention, a pair of joint constituent members each having a plurality of saddle member fixing holes are relatively rotatably connected (claim 1).

  From another point of view, the rotary joint according to the present invention includes a pair of joint constituent members each having a plurality of saddle fixing holes via a rotating element provided between the bottom surfaces on which the saddle fixing holes are not provided. And are relatively rotatably connected (claim 2).

  Furthermore, from another viewpoint, the rotary joint according to the present invention spans a pair of hemispheres provided with a plurality of saddle fixing holes having axial lines along the radial direction on the surface portion, and straddles between the pair of bottom surfaces, and A virtual center line passing through the center of the bottom surface and a fixing ring embedded so as to be rotatable relative to the respective hemispheres by matching the center line (claim 5).

  In the invention which concerns on Claims 1-5 of this invention, by making a pair of joint structural member mutually rotatable, the connection direction of a saddle member can be changed freely, and the direction of the saddle member which protrudes from a joint is changed. It is not fixed, it can be made variable, so that the design can be developed more freely, and a total design that gives more excitement, including functions and performance aspects that match the tastes and needs of the buyers, etc. An easy rotary joint is obtained. It is particularly suitable as a material for obtaining a truss structure.

That is, in the rotary joint according to the first to fifth aspects of the present invention, the pair of joint constituent members can be freely rotated, and preferably can be rotated with each other by using a rotating element (Claim 2). By adopting the method of fitting the brazing material into the brazing material fixing hole of the joint component, it is possible to easily change and adjust the protruding direction and arrangement of the brazing material and easily obtain a product that matches the target design Can be done. In other words, it is completely different from the conventional method in which only a fixed design can be obtained by a fixed connection, and the arrangement of the lumber is easy to change freely, and it can be used for furniture such as chairs, tables, racks, and even jungle. It will be possible to develop freely in structures such as gyms, allowing more freedom of design, and more inspiring, including functional and performance aspects that match the tastes and needs of the buyers. We can provide rotary joints that make it easy to obtain a total design. In particular, it is very easy to change or modify the design of the furniture and structures that can easily employ a truss structure.

In the above configuration, according to the present invention, it is desirable that the joint component is any one of a semicircular shape, a parabolic shape, and a polyhedron.
This is because a rotary joint having the most suitable design can be obtained depending on the product to be manufactured.

  According to a fourth aspect of the present invention, the rotating element is either a fixed ring provided with a locking claw on the upper and lower sides of the annular ring body or a protrusion having a large-diameter neck, and is formed in the engaging recess of the joint constituent member. In any case, the joint component is forcibly fitted only for rotation, so that it is possible to obtain a firm connection with a simple structure.

  Further, in the invention according to claim 5, a pair of hemispheres provided with a plurality of anchorage fixing holes having axial lines along the radial direction on the surface portion, and straddling between the pair of bottom surfaces, and the center of the bottom surface Since the virtual center line passing through the center line and the center line are matched and the fixing ring is forcibly fitted so as to be rotatable relative to each hemisphere, the pair of hemispheres The simple combination of the ball-shaped joint and the timber makes it an ideal structure for application to furniture or other structures, and at the same time, the adaptability to design diversity can be greatly improved. Unlike conventional products that connect components in a fixed manner, there is a possibility of more flexible development of the design, including functions and performance aspects that match the preferences and needs of the buyers, Total design that gives you more excitement Emissions can provide easy rotation joints give.

It is an exploded sectional view of the rotation joint concerning this invention. The hemisphere of the rotary joint which concerns on this invention is shown, (A) is a top view, (B) is a front view. It is an expanded sectional view of the principal part which shows the connection structure of a fixing ring and a hemisphere. It is sectional drawing of the rotation jointant which shows the state which attached the saddle material. It is explanatory drawing of an effect | action, (A) is a front view which shows the action posture which made the protrusion direction of each saddle material the same in the upper and lower hemispheres, (B) rotates one side 180 degrees from the action posture of (A). It is a front view which shows the action attitude | position which orient | assigned the protrusion direction of the eaves to a different direction. The case where it applies to a chair is shown, (A) is a perspective view of a deck chair, (B) is a perspective view of what is called a chair provided with a backrest. It is whole sectional drawing which shows the modification of a fixing ring. It is sectional drawing of the ball join provided with the protrusion which is a modification of a rotation element. It is a perspective view which shows the chair of a conventional structure.

Hereinafter, 1st Embodiment of the rotation joint which concerns on this invention is described based on description of FIGS.
As shown in FIGS. 1 to 5, a resin ball joint 1 </ b> A, which is an example of the rotary joint 1, includes a hemisphere 2 </ b> A as a pair of joint components 2 and a pair of hemispheres 2 </ b> A rotatably connected to each other. It comprises a fixing ring 3A as an example of the moving element 3 and a saddle member fixing hole 4 integrally formed in a radial direction in the arc portion of the hemisphere 2A. As shown by an imaginary line in FIG. 4, the saddle member 5 is fitted in the radial member fixing hole 4 with the small-diameter portion 5 </ b> A at the distal end thereof fitted in the radial direction.

As shown in FIGS. 1 to 4, the hemisphere 2 </ b> A has a shape obtained by dividing a sphere into two parts. Each of the partial arc surfaces (semi-circular portions) 6 is provided with four saddle fixing holes 4 in the illustrated example. Further, the bottom surface 7 on the opposite side of the partial arc surface 6 is formed flat, and a concave portion 8 is formed at a position slightly inward from the outer peripheral edge 7A. A hole for mounting the fixing ring 3A is formed. As shown in FIG. 1, a locking step portion 9 that protrudes toward the center side of the concave portion 8 is integrally projected from the peripheral wall 8 </ b> A of the concave portion 8 toward the back from the opening edge 8 </ b> B.

  In addition, as shown in FIG. 2, there are three saddle fixing holes 4 at the top 6A of the partial arc surface 6 and at three intervals at equal intervals in the circumferential direction of the intermediate portion of the vertical dimension of the partial arc surface 6. Four are drilled to a predetermined depth along the radial direction. That is, in plan view, it is provided so that the mouths of the other three anchor fixing holes 4 are located at the apexes of the equilateral triangle with the anchor fixing hole 4 at the top 6A as the center. The saddle member fixing hole 4 is formed on a solid inner surface, and is configured such that the small diameter portion 5A at the tip of the saddle member 5 is simply inserted.

  More specifically, the configuration of the hemisphere 2A is 50 mm in diameter, 25 mm from the bottom surface 7 to the top portion 6A, 6 mm in diameter of the anchoring material fixing hole 4, and 15 mm in depth.

  The hemisphere 2A having the above configuration is obtained by injection molding using hard silicone as a material.

  Next, as shown in FIGS. 1, 3, and 4, the fixing ring 3 </ b> A as an example of the rotating element 3 has a predetermined width in the vertical direction, and a main body portion 10 formed on the ring and an inner periphery of the main body portion 10. It is composed of an inward flange body 11 for extending the strength from the middle of the upper and lower sides of the surface 10A so as to integrally extend inward. Further, locking claws 12 are integrally provided at both upper and lower ends of the main body portion 10. The latching claws 12 are shown in a form in which the lower end of the main body portion 10 is bulged sequentially toward the middle and outward from the upper and lower apexes of the main body portion 10, and finally the lower end is constricted. Such a locking step 13 is formed.

  The outer diameter of the locking claw 12 provided on the fixing ring 3A is formed to be slightly longer than the inner diameter of the locking step 9 when provided in the concave portion 8 of the hemisphere 2A. In this case, the vertical virtual center line S of the hemisphere 2A and the vertical virtual center line S1 of the fixed ring 3A are aligned on the same axis, and then fitted only freely by forced fitting. The fixing ring 3A is also obtained by injection molding using hard silicone as a material.

  Accordingly, the locking ring 13A of the locking claw 12 and the locking step 9 of the recess 8 of the hemisphere 2A are fitted into the recess 8 of the hemisphere 2A. When they are engaged with each other, they act so as to connect the fixing ring 3A to the hemispherical body 2A only in relative rotation. Further, the engagement between the locking claw 12 and the locking step portion 9 is such that the locking claw 12 is firmly engaged with the locking step portion 9 and cannot be easily detached once engaged. The above dimensions are set.

  In the ball joint 1A according to the present invention, first, the hemispheres 2A are strongly pressed toward each other with the bottom surface 7 of each of the pair of hemispheres 2A facing each other and the fixing ring 3A sandwiched therebetween. Then, using the elastic deformation of the main body portion 10 of the fixing ring 3A, the fixing ring 3A is forcibly fitted into each of the recesses 8. By this fitting, the pair of hemispheres 2A are fitted to the fixing ring 3A only in relative rotation. That is, a ball joint 1A is obtained in which a pair of hemispheres 2A are connected to each other so as to be rotatable.

Next, the small diameter portion 5A at the tip of the brazing material 5 is fitted into each of the brazing material fixing holes 4, and the other end of the brazing material 5 is also fitted into the brazing material fixing hole 4 of another ball joint 1A. Are different from each other as shown in FIG. For example, from the posture shown in (A) of the figure, one hemisphere 2A is rotated 180 degrees with respect to the other as shown in (B) of the figure. Since the relative rotational postures of the two hemispheres 2A can be freely changed by 360 degrees, various forms of truss structure 19 (see FIG. 6) as an example can be easily obtained. In other words, the overhanging direction of the saddle material 5 can be freely changed by simply rotating the hemisphere 2A, and the saddle material 5 can be appropriately selected by fitting a plurality of saddle material fixing holes 4 together. A variety of designs can be obtained. In this way, the truss structure 19 of your choice is constructed in sequence, and finally a variety of designs such as deck chairs or so-called chairs, shown as examples in FIGS. 6A and 6B, are shown. Go make products. The eaves member 5 is, for example, a headboard 5B, a backrest 5C, a seat frame 5D, a front leg 5E, a rear leg 5F, and further, a through 5G and a horizontal beam 5H.

  The chair assembled in this manner is provided in the ball joint 1A composed of a pair of hemispheres 2A, a fixing ring 3A as a rotating element 3 that allows relative rotation of the pair of hemispheres 2A, and the hemisphere 2A. It is composed of a plurality of brazing material fixing holes 4, and by inserting the brazing material 5 into the brazing material fixing hole 4 of the hemisphere 2A, and by simply changing the relative posture of the hemisphere 2A as appropriate, The chair design is easy to arrange, easy to develop, easy to process, and inexpensive.

  Next, the structure shown in FIG. 7 shows a modification of the fixing ring 3A. In this modification, U-shaped cutouts 14 are provided at equal intervals in the circumferential direction across the inward flange 11 of the main body portion 10. Although twelve of each are provided, the arrangement is different in phase so as to be staggered vertically as shown in FIG. The notch 14 works so that the deformation of the main body portion 10 of the fixing ring 3A becomes easier, and the fitting of the hemisphere 2A into the recess 8 can be performed more easily. The reason why the phases are different in the circumferential direction at the top and bottom is also to maintain strength.

  Further, the structure shown in FIG. 8 shows a structure that is substituted for the fixing ring 3A as the rotating element 3, and is integrally formed from the center of the bottom surface 7 of one hemispherical body 2A, with a large-diameter neck at the tip. A projection 16 having an arrow shape (mushroom type) having a cross section 15 is provided, and a fitting recess 18 having a step 17 for receiving the large diameter neck 15 is provided at the center of the bottom surface of the other hemisphere 2A. It is configured. In a manner of fitting the neck into the body of the kokeshi doll, the large-diameter neck portion 15 of the protrusion 16 is pushed into the back of the step portion 17 of the insertion recess 18 so as to be able to rotate only freely. The hemispheres 2A are joined together only in relative rotation. Since the protrusion 16 can be integrally processed with one hemisphere 2A, manufacturing is easy, the number of parts can be reduced by one, and it can provide more economically.

  In the modification shown by the imaginary line in FIG. 8, the protrusion 16 is not processed integrally with one hemisphere 2A, but also for this one hemisphere 2A, similarly to the other hemisphere 2A. Also, a means can be employed in which the engaging claw 12 is provided on the other of the protrusions 16 to form an independent and separate protrusion 16, and the fitting recess 18 and the stepped portion 17 are also provided on one hemisphere 2A to be joined by forced fitting. .

  Further, in the above embodiment, the ball joint 1A is shown as the joint 1. However, the rotary joint according to the present invention is not necessarily limited to the ball joint 1A composed of the pair of hemispheres 2A, and a pair of joint constituent members 2 is necessary. If it is relatively rotatable, it achieves the intended purpose, not shown, but for example, a triangular pyramid, a cube, a rectangular parallelepiped, a semi-elliptical shape whose cross-sectional shape is represented by a parabola, a pentagon, It may be a polyhedron such as a hexagon and can be applied to any shape.

  In addition to the hard silicone described above, an appropriate synthetic resin material or a metal such as an aluminum alloy can be used as the material constituting the joint as necessary.

  Further, in the above embodiment, the example in which the joint fixing member 2 is provided in the joint component member 2 along the radial direction is shown in the radial direction, but the radial direction is not necessarily limited to this radial direction. If necessary, it is configured in a hole that can protrude in the vertical direction, the horizontal direction, and directions with various angles.

  Moreover, although the form shown above showed the case where it applied to a chair, applicable products are not restricted to a chair, for example, furniture, such as a desk leg and a reel, a rack and a bench, and structures, such as a jungle gym Needless to say, it can also be applied.

  Each of the embodiments described above is not necessarily limited to the structure shown in the drawings, and the individual structures and shapes shown can be combined with each other or used without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 ... Rotating joint 1A ... Ball joint 2 ... Joint component 2A ... Hemisphere 3 ... Rotating element 3A ... Fixing ring 4 ... Saddle material fixing hole 5 ... Saddle material 5A ... Small diameter part 5B ... Kasagi 5C ... Backrest 5D ... Seat Frame 5E ... Front leg 5F ... Rear leg 5G ... Through 5H ... Horizontal beam 6 ... Partial arc surface 6A ... Top 7 ... Bottom 7A ... Outer surface 8 ... Recessed 8A ... Peripheral wall 8B ... Opening edge 9 ... Locking step 10 ... Body part DESCRIPTION OF SYMBOLS 10A ... Inner peripheral surface 11 ... Inward flange 12 ... Locking claw 13 ... Locking step part 14 ... Notch 15 ... Large diameter neck part 16 ... Projection body 17 ... Step part 18 ... Insertion recessed part 19 ... Truss structure S ... Vertical virtual Center line S1 ... Vertical virtual center line

Claims (5)

  A rotary joint in which a pair of joint constituent members each having a plurality of anchoring material fixing holes are connected so as to be relatively rotatable.   Rotation in which a pair of joint constituent members having a plurality of brazing material fixing holes are rotatably connected to each other via a turning element provided between the bottom surfaces on the side where no brazing material fixing holes are provided. Joint.   The rotary joint according to claim 1, wherein the joint component is one of a semicircular shape, a parabolic shape, and a polyhedron.   The rotating element is either a fixed ring provided with a locking claw on the upper and lower sides of the annular ring body or a projection body having a large-diameter neck portion, and is fitted into the engaging concave portion of the joint constituent member by force fitting so as to be rotatable only. The rotary joint according to claim 1.   A pair of hemispheres provided with a plurality of anchorage fixing holes that have radial axes along the surface in the surface portion, and a virtual center line that crosses between the pair of bottom surfaces and passes through the center of the bottom surface matches the center line And a fixed ring embedded so as to be rotatable relative to each hemisphere.