JP2015068357A - Nut raw material for manufacturing synthetic resin nut - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin nut of which manufacturing is easily carried out.SOLUTION: A nut 100 of this preferred embodiment is manufactured by assembling nut raw material 200. The nut raw material 200 has a shape in which the nut 100 being used is halved and first and second nut-halves 202, 204 are connected by an integral molding hinge 206. The first nut halve 202 has two supporting columns 208 and a claw 210 positioned at the upper end of each of the supporting columns. In regard to this claw 210, the second nut halve 204 is formed with a hole 212 for receiving the claw 210. When the first nut halve 202 and the second nut halve 204 are overlapped to each other, the claw 210 is engaged with a step 212a.

Description

  The present invention relates to a nut material for making a synthetic resin nut.

  As a fastening means, a combination of bolts and nuts is used in various fields. For example, Patent Documents 1 to 3 disclose the installation of an outdoor unit in an air conditioning system. As can be seen from these Patent Documents 1 to 3, many bolts and nuts are used to install the outdoor unit. . The outdoor unit once installed at a predetermined position is used as it is for a long time.

  Bolts and nuts are made of synthetic resin in addition to metal. In actual use, a combination of a metal bolt and a metal nut, or a combination of a synthetic resin bolt and a synthetic resin nut is generally used. A combination with a nut or a combination of a synthetic resin bolt and a metal nut may be used.

  Synthetic resin nut materials include: vinyl chloride (PVC) synthetic resin, polyphenylene sulfide (PPS) synthetic resin, polypropylene (PP) synthetic resin, polyimide synthetic resin, polytetrafluoroethylene (PTFE) synthetic resin, polyether ether ketone (PEEK) synthetic resin and the like can be exemplified.

  Synthetic resin nuts are generally manufactured by injection molding using a core. Patent Document 4 proposes a method for manufacturing a nut made of a synthetic resin that is screwed onto a screw shaft of a feed screw device. Specifically, a core having a male screw on the outer peripheral surface is prepared, and after the core is placed in a mold, a molten synthetic resin is filled in the mold and an annular molded body is injection molded. And when taking out an annular molded object from a metal mold | die, it removes, rotating a core. As a result, an annular molded body having a threaded portion on the inner peripheral surface, that is, a synthetic resin nut is completed.

JP 2004-125195 A JP 2005-140357 A JP 2010-196989 A JP 2000-74172 A

  In the production of synthetic resin nuts, it is necessary to form a thread on the inner peripheral surface rather than simply forming an annular molded body having a through hole. In addition, a process of removing the core after forming the molded body is necessary. This all increases costs.

  An object of the present invention is to provide a synthetic resin nut that is easy to manufacture.

  A further object of the present invention is to provide a synthetic resin nut that can be manufactured without a core having a male screw.

According to the present invention, such a technical problem is
It is a nut material for making a nut made of synthetic resin,
First and second nut halves obtained by dividing the nut into two along the axis of the screw hole of the nut;
An integrally formed hinge for connecting the first and second nut halves;
A fixing means for locking the first and second nut halves so that they cannot be separated from each other in a state where the first and second nut halves are overlapped around the integrally formed hinge. This is achieved by providing a nut material made of synthetic resin.

  That is, according to the present invention, since the nut material has a form in which the nut is halved, the nut material does not have a hollow screw hole that penetrates the nut. Therefore, a core is not required when molding the nut material. And a nut can be made by bending a nut material around an integrally formed hinge. Therefore, a synthetic resin nut can be manufactured without a core having a male screw.

It is a perspective view of the synthetic resin nut of the Example at the time of use. It is a perspective view of the nut raw material of the unfolded state immediately after injection molding. It is a figure for demonstrating the state in the middle of making a nut material by bending a nut raw material. (A) is a plan view of the nut material in the unfolded state (immediately after molding), (b) is a right side view, (c) is a left side view, ) Is an end view, (E) is a rear view of the nut blank 200, and (F) is a cross-sectional view taken along the line A-A added to the plan view (A). It is a figure for demonstrating the modification of 1st Example. It is a figure for demonstrating 2nd Example.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First Example (FIGS. 1 to 4) :
1 to 4 show a synthetic resin nut of the first embodiment. FIG. 1 is a perspective view of the nut 100 after being assembled, that is, in use. FIG. 2 is a perspective view of the nut material 200 immediately after molding. FIG. 3 is a diagram for explaining a state in the middle of making the nut 100 in use by bending the nut material 200. FIG. 4 is a view showing each surface of the nut blank 200.

  With reference to FIG. 1, the form of the nut 100 at the time of use has a flat rectangular external shape outline, and has the screw hole 102 in the center part. Of course, the outer contour of the nut 100 is arbitrary, but it may be non-circular such as a polygon or an ellipse in plan view. Reference numeral 104 in FIG. 1 indicates a thread.

  A commercially available bolt (not shown) is screwed into the screw hole 102 of the nut 100. In other words, the diameter of the screw hole 102 and the thread 104 are designed to fit commercially available bolts. The target bolt may be made of metal or synthetic resin.

  The nut 100 made of synthetic resin is made by assembling the nut material 200 shown in FIG. The nut material 200 will be described with reference to FIG. 2. The nut material 200 has a shape obtained by halving the nut 100 in use. That is, the nut material 200 has a shape in which the nut 100 is divided in half by a plane passing through the axis of the screw hole 102 and the nut 100 is opened.

  Reference numeral 202 in FIG. 2 indicates one first nut half, and 204 indicates the other second nut half. The first and second nut halves 202 and 204 are connected by a living hinge 206.

  With reference to FIG. 3, the nut 100 made of synthetic resin can be assembled by bending the nut material 200 in the direction in which the first and second nut halves 202 and 204 are brought close to each other around the integrally formed hinge 206.

  In the nut 100 after the nut material 200 is assembled, the opposing surfaces 202a and 204a where the first and second nut halves 202 and 204 overlap each other are flat, and two opposing surfaces 202a and 204a are formed over the entire surface. Is designed to abut.

  2 and 3, the opposing surface 202a of the first nut half 202 includes two struts 208 protruding from the opposing surface 202a and claws 210 positioned at the upper ends of the respective struts. The two claws 210 are arranged on the left and right sides of the screw hole 102. A plurality of pairs of claws 210 may be provided in the longitudinal direction of the first nut half 202 (in the axial direction of the screw hole 102).

  As an element related to the claw 210 of the first nut half 202, a hole 212 for receiving the claw 210 is formed in the facing surface 204 a of the second nut half 204. Of course, the nail receiving holes 212 are arranged on the left and right sides of the screw hole 102.

  4, (a) is a plan view of the nut material 200 in an unfolded state (immediately after molding). (B) is a right side view. (C) is a left side view. (D) is an end view. (E) is a rear view of the nut blank 200. FIG. (F) is sectional drawing along the AA line added to the top view.

  As best understood from FIG. 4F, the claw receiving hole 212 has a stepped portion 212a to which the claw 210 can be locked, and an inclined surface 212b for guiding the claw 210 to the stepped portion 212a. .

  The nut 100 in use as described with reference to FIG. 1 can be made by assembling the nut material described with reference to FIGS. Specifically, the first nut is formed by bending the molded nut material 200 in a direction in which the first and second nut halves 202 and 204 are brought closer to each other around the integrally molded hinge 206. The claw 210 of the half 202 enters the claw receiving hole 212 of the second nut half 204. In the process in which the claw 210 enters the claw receiving hole 212, the claw 210 comes into contact with the inclined surface 212b. In the process in which the claw 210 is guided while coming into contact with the inclined surface 212b and proceeds into the claw receiving hole 212, the support column 208 is bent and deformed by elastic deformation.

  When the first and second nut halves 202 and 204 overlap each other, the claw 210 is released from the inclined surface 212b, and along with this release, the claw 210 is elastically restored to the original posture. It will be in the state latched by the step part 212a. As a result, the first and second nut halves 202 and 204 of the nut blank 200 are locked so as not to be separated from each other in a state where they overlap each other. With this lock, the state of the nut 100 can be maintained while preventing the claw 210 from coming out of the claw receiving hole 212.

  Referring again to FIG. 1, it is preferable to provide a height difference Δh between the surface 202 b of the first nut half 202 and the surface 204 b of the second nut half 204. Here, the claw 210 enters the surface 202b, 204b of the first and second nut halves 202, 204 on the opposite side to the above-described integrally formed hinge 206, that is, the claw receiving hole 212. Refers to the surface adjacent to the stepped portion 212a with which is engaged. The second nut half 204 provided with the claw receiving hole 212 is relatively higher than the first nut half 202 provided with the claw 210. By making the second nut half 204 thicker than the first nut half 202, the thickness of the second nut half 204 in the vicinity of the step portion 212 a can be increased. Thereby, the rigidity of the step part 212a with which the nail | claw 210 is latched can be improved.

  In other words, this means that the thickness of the first nut half 202 is made as thin as possible, thereby reducing the amount of resin corresponding to the height difference Δh that is thinner than that of the second nut half 204. There is an advantage that you can. This means that manufacturing costs can be reduced.

  The nut material 200 includes a half tube-shaped groove 220 that forms the screw hole 102 of the nut 100, and a half screw-shaped thread 222 that forms the thread of the nut 100 is formed in the groove 220. Since the groove 220 and the screw thread 222 are exposed to the outside, injection molding can be performed without using a core. Thereby, the manufacturing cost of a synthetic resin nut can be reduced.

Modification of the first embodiment (FIG. 5) :
FIG. 5 shows a nut material 300 according to a modification of the first embodiment described above. In FIG. 5, the same reference numerals are assigned to the same elements as those of the nut material 200 of the first embodiment described above. The nut material 300 of this modification has a slit 302 that halves the width of each column 208 and the claw 210 at the upper end thereof. The slit 302 forms a claw 304 whose width is approximately half that of the claw 210 of the first embodiment described above.

  That is, the nut material 300 of the modified example has a total of four columns 306 and claws 304 at the upper end thereof. Then, the two claws 304 </ b> A and 304 </ b> B that face each other with the slit 302 interposed therebetween are inserted into one claw receiving hole 212.

  As described above, by adopting a configuration in which the pair of claws 304A and 304B positioned with the narrow slit 302 interposed therebetween is inserted into one claw receiving hole 212, a pair of support columns 306A facing each other with the slit 302 interposed therebetween. , 306B can be designed to be small. This has the following advantages. That is, when the nut material 300 is bent by the integrally formed hinge 206 to form the nut 100, the claw 304 enters the claw receiving hole 212. At that time, each column 306 is flexibly deformed (elastically deformed). Since the column 306 has a narrow shape, the column 306 of the nut material 300 according to this modification is easily bent and deformed as compared with the wide column 208 (first embodiment). Thereby, the nut material 300 can be bent by the integrally formed hinge 206 to form the nut 100, and the operation can be performed smoothly.

  In the nut material 300 of this modified example, as described above, the pair of claws 304A and 304B are received in one claw receiving hole 212. The total width of the two claws 304A and 304B is substantially the same as the width of each claw 210 described in the first embodiment. Therefore, the two claws 304A and 304B can exhibit the same locking function as the claws 210 described in the first embodiment in cooperation with each other. Of course, the width of each claw 304 may be further reduced so that three or more claws 304 are inserted into one claw receiving hole 212.

Second Example (FIG. 6) :
FIG. 6 shows a nut blank 400 of the second embodiment. FIG. 6 shows a state in which the nut 402 is formed by folding the integrally formed hinge 206 of the nut material 400 and overlapping the first and second nut halves 202 and 204 with each other. In the description of the second embodiment with reference to FIG. 6, the same reference numerals are given to the same elements as those of the nut material 200 of the first embodiment described above.

  The nut material 400 of the second embodiment has a column 404 constituting a part of the rectangular outer contour and a claw 406 at the tip thereof. The stepped portion 408 that engages with the claw 406 is exposed to the outside of the second nut half 204. That is, in the nut material 200 of the first embodiment, the step portion 212a is formed in the claw receiving hole 212, but this claw receiving hole 212 does not exist in the nut material 400 of the second embodiment.

  The nut materials 200, 300, and 400 of the first embodiment, the modified example, and the second embodiment described above are used for installing an outdoor unit of an air conditioning system that is left in a state after being bolted once. Needless to say, the application is not limited to outdoor units.

100 Nut made from the nut material of the first embodiment 102 Screw hole 104 Screw thread 200 Nut material of the first embodiment 202 First nut half 202a Opposing surface of the first nut half 202b Surface of the first nut half 204 Second nut half 204a Opposing surface 204b of second nut half 204b Surface of second nut half 206 Integrated molding hinge 208 Post (fixing means)
210 Claw (fixing means)
212 Claw receiving hole 212a Stepped portion 212b Guide inclined surface 220 Nut half groove (half tube)
222 Thread of nut half 300 Nut material of modification of first embodiment 400 Nut material of second embodiment

Claims (5)

It is a nut material for making a nut made of synthetic resin,
First and second nut halves obtained by dividing the nut into two along the axis of the screw hole of the nut;
An integrally formed hinge for connecting the first and second nut halves;
A fixing means for locking the first and second nut halves so that they cannot be separated from each other in a state where the first and second nut halves are overlapped around the integrally formed hinge. Synthetic resin nut material. The fixing means has first and second opposing surfaces that abut the first and second nut halves when the nut halves overlap each other;
The struts formed on one of the first and second opposing surfaces and projecting from the one opposing surface and the claw located on the upper end of the strut, and the other opposing surface and the claw And the fixing means is constituted by a step portion that can be locked,
The nut material according to claim 1, wherein the claw is locked to the step portion when the integrally formed hinge is bent and the first and second nut halves are overlapped with each other. A nail receiving hole for receiving the nail is formed on the other facing surface,
The nut material according to claim 2, wherein the step is formed in the claw receiving hole.   The nut material according to claim 3, further comprising an inclined surface that is formed in the nail receiving hole and abuts on the nail when the nail enters the nail receiving hole.   The nut material according to claim 3 or 4, wherein a plurality of nails are inserted into one nail receiving hole.

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