JP4023742B2 - Nut holder and nut with nut holder - Google Patents

Description

The present invention can be used in combination with a normal standard nut, or in combination with a normal standard nut to achieve one-side work, prevent co-rotation during tightening, or prevent loosening after tightening. A nut holder that can achieve one or two or more at the same time, and in particular, with regard to locking after tightening, a nut holder that can automatically realize double nut tightening by a normal tightening operation. And a nut with a nut holder.

  There are many cases where the nut cannot be held directly or via a tool such as a wrench in the bolting operation that requires the nut, depending on the assembly state of the mechanical device or structure that is the work target. As a work method in such a case, before assembling a machine or a structure, a simple means for adhering the nut to a place where the nut is required or a strong means such as welding the nut is used in advance. A method of fixing the nut is adopted.

  The method of fixing the nut in advance to the required location is a considerable amount of work in advance when the number of nuts to be fixed is large, particularly when a means for firmly fixing the nut is employed. It is necessary that the location for fixing the nut is completely determined, and accurate design work is a prerequisite. Therefore, in the field of civil engineering and construction, where it is often necessary to respond flexibly depending on the situation at the site, it may be difficult to adopt, and it may be necessary to change the design of mechanical devices and structures, or to tighten bolts that occur afterwards. There is a problem that cannot be accepted. On the other hand, when a simple means is used to fix the nut, when the nut rotates together, a very inconvenient situation in which the bolt cannot be tightened or pulled out occurs. Such a situation frequently occurs even when a bolt that has been tightened normally is loosened later due to deformation of the bolted material.

  It is known that double nut tightening is extremely effective for preventing the nut from loosening. Double nut tightening is a construction method in which a pair of nuts screwed into the same bolt are relatively rotated by rotating relative to each other in a direction approaching each other, thereby making it impossible to rotate the nut relative to the bolt. Since it is a complicated work content in which each is turned with a spanner, it cannot be carried out by one-side work from the bolt side.

As a conventional technique that seems to deal with any of the nut fixing problem, the co-rotation problem, and the subsequent loosening problem at a place where the nut cannot be held by a spanner or the like, for example, there is the following.
Japanese Utility Model Publication No. 60-75713 Japanese Utility Model Publication No. 62-24116 JP-A-7-63211

  Patent Document 1 discloses a cap nut. This cap nut has a configuration in which a metal nut is inserted inside a cap nut body made of hard synthetic rubber or the like, the opening side facing the bolted material is enlarged, and a ring packing is provided in this portion. . A large gap is set between the ring packing and the nut, and when tightening the bolt, the nut does not directly contact the material to be bolted, and the tightening pressure by bolt tightening is a bag made of hard synthetic rubber, etc. Received by the nut body. Therefore, the maximum tightening torque for this cap nut is limited to buckling of the non-metallic cap nut body or dropout of the nut due to deformation of the cap nut body, and the tightening torque is as large as that applied to a normal nut. There is a problem that it is difficult to add.

  Patent Document 2 discloses a nut having a silicon ring attached to one nut end face. The silicon ring in this nut is attached so as to be partially embedded in an annular groove formed on the end face of the nut, and it is considered that it is possible to effectively prevent co-rotation without being displaced. However, there is no fixing function for the bolted material, and it is necessary to hold the nut directly or indirectly until the time when the silicon ring exerts a predetermined frictional engagement force against the bolted material. It is difficult to tighten by only one side work. Also, the possibility of welding to the bolted material by providing a silicon ring is lost.

  Patent Document 3 discloses a locking nut for preventing loosening. This loosening prevention seal nut is formed by integrally forming a bowl-shaped seal portion around the opening of a cap nut-shaped resin member and inserting a metal nut therein. In addition, on the back side of the metal nut, a screwless bag hole corresponding to the inner diameter of the screw hole of the metal nut is formed in a manner communicating with the screw hole of the metal nut, and the tip of the bolt that has passed through the metal nut in use The part advances while engraving a screw in the screwless bag hole, and can be screwed into both the metal nut and the resin member. Since there is no screw in the unthreaded bag hole, the required tightening torque when tightening the first bolt is extremely large, so it is considered that if the resin member is not held strongly, it will rotate together It is done. Therefore, it is impossible to tighten in one side operation. Further, as described in the same document, the loosening prevention effect for the bolt is caused by friction between the resin member and the bolt, and is not due to the double nut tightening between the metal nut and the resin member. In order to realize double nut tightening, it is necessary that the two nuts rotate relative to each other in the approaching direction. In the above configuration, both cannot rotate relative to each other.

  As shown in the above-mentioned document, in the conventional nut intended to achieve one-side work, prevent co-rotation during tightening, or prevent loosening after tightening, the nut itself is a finished product having a special configuration. Therefore, there is a problem that normal-standard nuts that are abundant in size and easily available cannot be used. It is an object of the present invention to realize any one of the above objects, or two or more at the same time by using a combination with a normal standard nut or using a combination with a normal standard nut. In particular, an object of the present invention is to provide a nut holder and a nut with a nut holder that can automatically realize double nut tightening by a normal tightening operation with respect to locking prevention after tightening.

In order to achieve this object, a nut holder according to claim 1 of the present invention is provided with a stepped hole formed integrally with a nut loading hole for loading a nut and a bolt hole for penetrating the bolt in a stepped portion. And a fixing screw plate with a screw hole for fixing to the end face of the bush member on the bolt hole side. The bush member is made of an elastic material, and the depth of the nut loading hole is the depth of the nut to be loaded. The dimension is set so as to exceed the thickness, and a bolt to be screwed in from the nut loading hole side is screwed into both the nut loaded with a part of the bush member interposed therebetween and the screw hole of the fixed screw plate.

  By setting the depth of the nut loading hole to exceed the thickness of the loaded nut, when the nut is loaded into the nut loading hole and the end surface of the bushing member on the nut loading hole side is pressed against a predetermined location of the bolted material The end face of the bush member elastically adheres to the bolted material without being obstructed by the thickness of the loaded nut, and generates a predetermined friction according to the elastic material forming the bush member. Next, when the bolt is inserted from the opposite side of the bolted material, the nut is pressed against the bolt and pressed against the inner surface of the nut loading hole formed in the stepped state, and the bolt is screwed into the loaded nut. Match. Further, the bolt advances in the bolt hole and is screwed into the screw hole of the fixed screw plate fixed to the end surface on the bolt hole side. Therefore, in this state, a part of the bush member is sandwiched between the fixed screw plate and the nut. If the bolt tightening operation is continued as it is, the fixing screw plate and the nut move to the bolted material side while a part of the bush member is sandwiched, and the nut is pressed against the bolted material. At this time, the bolt tightening operation is completed by tightening the bolt with a predetermined tightening torque. Here, assuming that the nut rotates together while the predetermined tightening torque for the bolt is not achieved, only the fixed screw plate moves to the bolted material side even though the nut does not move to the bolted material side. A part of the bush member sandwiched between the two is compressed. As a result, the compressed bush member strongly presses the nut against the bolted material, and further rotation is suppressed. That is, it is possible to increase the force for stopping the common rotation as the nut rotates together. Also, once the nut is tightened, it is elastically pressed by the fixing screw plate through a part of the sandwiched bush member, and if the nut rotates in the loosening direction, the part of the sandwiched bush member must be further compressed. Therefore, a strong locking action is demonstrated.

  The nut holder according to claim 2 of the present invention is set to a range in which the diameter of the nut loading hole exceeds the diameter of the inscribed circle inscribed in the hexagonal outer shape of the nut to be loaded and is smaller than the diameter of the circumscribed circle inscribed in the hexagonal outer shape. It is characterized by doing.

  By setting the diameter of the nut loading hole within this range, it is possible to easily load the nut using the elastic deformation of the bush member, to maintain the posture of the loaded nut by the elastic recovery force of the bush member, and to load the nut holder. Simple handling as a single member integrated with the nut is realized.

  The nut holder according to claim 3 of the present invention is characterized in that the bush member has a tapered outer shape in which the bush member opens from the end surface on the bolt hole side toward the end surface on the nut loading hole side.

  Since the area of the end face on the nut loading hole side that abuts against the bolted material during use can be increased, it is easy to ensure the frictional force necessary to prevent the bush member itself from rotating together. In addition, when an adhesive is applied to the end surface on the nut loading hole side, a larger bonding area can be secured.

  The nut holder according to claim 4 of the present invention is characterized in that an adhesive layer made of a pressure sensitive adhesive coated with release paper is formed on the end face of the bush member on the nut loading hole side.

  The nut holder according to the present invention can fix the nut to an arbitrary portion of the bolted material by a simple operation of loading the nut into the nut loading hole, removing the release paper, and pressing it against the bolted material. .

  The nut holder according to claim 5 of the present invention is characterized in that the elastic material forming the bush member is a rubber-based elastic material.

  The rubber-based elastic material has a large friction coefficient, effectively preventing the bush member itself from co-rotating, and also has high chemical resistance, so it can be tightened for a long time even in an environment where machine oil adheres. Can be maintained.

  The nut with a nut holder according to claim 6 of the present invention is formed by previously loading a nut into the nut loading hole of the nut holder according to any one of claims 1 to 5.

  Such a nut with a nut holder does not require the work of combining the nut holder and the nut at the time of use, so that a quick bolting operation can be realized.

According to the present invention , it is possible to perform a bolt tightening operation by loading a normal standard nut into the nut loading hole, and when a bolt tightening operation is performed by loading the nut into the nut holder, a part of the bush member The bolt is screwed into both the nut and the screw hole of the fixed screw plate , and the nut and the screw are temporarily rotated together to rotate the nut and the fixed screw plate relative to each other. Therefore, the double nut tightening can be completed only by a simple screwing operation on the bolt.

  In addition, a nut holder having an adhesive layer made of a pressure-sensitive adhesive on the end face on the nut loading hole side can easily fix the loaded nut to any part of the bolted material, so one side only from the bolt side It is very easy to respond to work requests.

  The nut with a nut holder according to the present invention in which the nut loading hole of the nut holder is loaded in advance does not require the work of combining the nut holder and the nut, and can be handled as a single component like a single nut. Therefore, even when a large number of bolting operations are required, the operation can be efficiently performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. A nut holder 10A according to the present invention includes a bush member 11 and a fixing screw plate 12 (FIGS. 1A and 1B). The bush member 11 is, for example, an elastic plastic material such as soft polypropylene, soft polyethylene, polyvinyl chloride, polybutadiene, polyether ether ketone, or a rubber-based elastic material having a high friction coefficient such as neoprene rubber or nitrile rubber, or These foam materials are integrally formed. On the other hand, the fixed screw plate 12 is formed by punching a metal plate, a plate made of steel or synthetic resin into a disc shape, and providing a screw hole B3 at the center.

  The bush member 11 has a frustoconical outer shape, and a stepped hole B is formed at the center thereof. In the stepped hole B, a relatively large-diameter nut loading hole B1 for loading the nut N1 and a relatively small-diameter bolt hole B2 for passing a bolt that fits the nut N1 form a step 11D. Are continuous. The nut loading hole B1 opens on one end surface a of the bush member 11, and the bolt hole B2 opens on the other end surface b. Therefore, both the end surface a on the nut loading hole B1 side and the end surface b on the bolt hole B2 side have a ring shape. The fixing screw plate 12 is fixed by adhering to the end surface b on the bolt hole B2 side.

  The diameter of the bolt hole B2 and the diameter of the nut loading hole B1 in the bush member 11 are determined based on the screw hole B3 of the fixed screw plate 12. That is, the diameter of the bolt hole B2 is set to a diameter capable of loosely fitting a bolt that is properly screwed into the screw hole B3 of the fixed screw plate 12, and the diameter of the nut loading hole B1 is set to the same bolt. The diameter is set such that the nut N1 to be screwed can be loosely inserted. As shown in FIG. 1B, when the nut loading hole B1 has a taper, this requirement is satisfied for the smallest diameter portion of the nut loading hole B1.

  As the nut N1 to be loaded in the nut loading hole B1, JIS standard, ISO standard, and other standard products that are easily available as commercial products are assumed, and the depth D1 of the nut loading hole B1 is the nut N1 of any standard. Is set to a size that exceeds the thickness of the nut N1 to be loaded.

  Next, the usage example of the present embodiment will be described. The nut holder 10A includes an arbitrary bolt M1 that can be screwed into the screw hole B3 of the fixing screw plate 12, and an arbitrary nut N1 that can be screwed into the bolt M1. Are used in combination (FIGS. 2A and 2B). This figure shows an example of use when the other bolted material (child material) M3 is bolted to one bolted material (base material) M2. One bolted base material M2 serves as a place to stop a bolted fastener material M3 to be retrofitted, and through holes H2 and H3 for inserting bolts M1 are prepared.

  The through hole H2 of the bolted base material M2 and the through hole H3 of the bolted base material M3 are matched, and the nut N1 to be used is loaded into the nut loading hole B1 of the nut holder 10A, and the bolted base material M2 Put it on the back side. At this time, alignment is performed so that the screw hole of the nut N1 can be seen through the matched through holes H2 and H3. It should be noted that the nut holder 10A positioned at a predetermined position may be pressed by hand when the bolting operation is possible on both sides, and when the both sides cannot be operated, the nut of the bush member 11 is loaded. A quick-drying adhesive is applied to the end face on the hole B1 side and temporarily fixed at that position. The depth D1 of the nut loading hole B1 in the bush member 11 is set so as to exceed the thickness of the nut N1 to be loaded. The end face a on the nut loading hole B1 side is tightened without being obstructed by the thickness of the nut N1. This is to ensure contact with the base material M2.

  The bolt M1 is inserted through the through hole H3 while rotating from the bolted fastener material M3. The tip of the bolt M1 that has entered the nut holder 10A presses the nut N1 against the step 11D of the stepped hole B, that is, the inner wall surface of the nut loading hole B1. Here, the posture and position of the nut N1 are determined, and the bolt M1 is screwed into the nut N1. Further, the tip of the bolt M1 passes through the bolt hole B2 and is screwed into the screw hole B3 of the fixing screw plate 12. A part g of the bush member 11 around the bolt hole B2 is fixed to the fixing screw plate 12 and the nut N1. (FIG. 2B). The portion g of the bush member 11 is a portion in contact with the fixing screw plate 12, and is a thickness portion when the nut N1 is pressed against the wall surface on the back side of the nut loading hole B1, and this portion also exhibits elastic force. To do.

  Further, when the bolt M1 is tightened, the fixed screw plate 12 and the nut N1 are screw-driven to the bolted base material M2 side with a part g of the bush member 11 being sandwiched therebetween, and the nut N1 is Stops in contact with the fastening base material M2. At this time, the side surface c of the bush member 11 is deformed into a wavy state (deformed inside or deformed outside) and restrains the nut N1.

  In order to achieve a predetermined tightening torque, the bolt M1 is further tightened. Here, if the nut N1 does not rotate together, a predetermined tightening torque can be easily achieved and the bolt tightening operation can be completed. The common rotation of the nut N1 in the bolt tightening operation is a phenomenon that is normally seen. However, in use in combination with the nut holder 10A, the side surface of the deformed bushing member 11 constrains the nut N1, and thus the common rotation. Can be prevented.

  However, when the nut N1 rotates in spite of restraint by the side surface c of the bush member 11, only the fixed screw plate 12 fixed to the bush member 11 is driven in a direction approaching the bolted base material M2. Therefore, the fixing screw plate 12 acts so as to press the nut N1 against the bolted base material M2 side through the part g of the sandwiched bushing member 11, and this action becomes stronger as the nut N1 continues to rotate together. It will be. Then, when the force pressing the nut N1 against the bolted base material M2 exceeds the force with which the nut N1 attempts to rotate together, the common rotation is stopped, and a predetermined tightening torque for the bolt M1 can be achieved.

  Next, another embodiment of the nut holder 10A according to the present invention will be described. The diameter A1 of the nut loading hole B1 formed in the bush member 11 may be set in a range that exceeds the diameter of the inscribed circle inscribed in the hexagonal outline of the nut N1 to be loaded and is less than the diameter of the circumscribed circle inscribed in the hexagonal outline. (FIGS. 3A and 3B). The range of the diameter A1 is such that a person using the nut holder 10A can easily load a commercially available nut N1 into the nut loading hole B1, and the loaded nut N1 is directly put into the nut loading hole B1 by frictional force. The dimension range to be retained. Therefore, the convenience in handling the nut holder 10A can be enhanced. Note that the condition that the depth of the nut loading hole B1 exceeds the thickness of the nut N1 to be loaded is maintained in any of the embodiments.

  An adhesive layer 13 made of a pressure sensitive adhesive coated with a release paper 13a can be formed on the end surface a of the bush member 11 constituting the nut holder 10A on the nut loading hole B1 side (FIGS. 3A and 3B). )). The adhesive layer 13 is formed on the entire end surface a on the nut loading hole B1 side having a ring shape. The adhesion mechanism of the pressure-sensitive adhesive is close to adhesion, and after the nut N1 is loaded into the nut loading hole B1, the release paper 13 is removed and the bushing member 11 is pressed against the bolted base material M2. Thus, the nut N1 can be fixed at an arbitrary position of the bolted base material M2, which is very convenient when used for the bolted base material M2 that cannot be operated on both sides (FIG. 4). However, it is necessary to prepare a through hole H2 for passing the bolt M1 in the bolted base material M2.

  The bush member 11 of the nut holder 10A can control the deformation of the side surface c during the bolting operation by changing the cross-sectional shape of the side surface c (FIGS. 5A and 5B). The bush member 11 shown in the figure is formed by forming an annular groove d having a trapezoidal cross section outside the side surface c. When an axial compressive stress is applied, the bush member 11 in this form is deformed without difficulty so that the side surface c bulges inward, and can stably restrain the loaded nut N1 and also deform the side surface c. Therefore, the rotating operation on the bolt M1 in the middle of reaching the predetermined tightening torque can be made light.

  The fixing screw plate 12 can be fixed by means of fitting instead of means for adhering to the end face b of the bush member 11 on the bolt hole B2 side (FIG. 6). A ring groove e corresponding to the thickness of the fixing screw plate 12 is formed around the end surface b on the bolt hole B2 side of the bush member 11, and the outer periphery of the fixing screw plate 12 temporarily places the bush member 11 in the ring groove e. It is inserted by deforming it. Since the bonding work and positioning work of the fixing screw plate 12 with respect to the bush member 11 can be omitted, the cost can be reduced, and a material that does not show affinity for the adhesive is used as the material of the bush member 11. It becomes possible to select.

  A commercially available flange nut N2 can be used as it is fixed to the bush member 11 as the fixing screw plate 12 (FIG. 7). In this case, the flange nut N2 may be fixed to the bush member 11 by fitting the flange f of the flange nut N2 into the ring groove e and fixing the same as in the above embodiment. Since the amount of screwing as the fixing screw plate 12 with respect to the bolt M2 is large, it can sufficiently withstand a bolt tightening operation that requires a strong tightening torque.

  The nut 20A with a nut holder according to the present invention is formed by loading the nut N1 into the nut loading hole B2 of the nut holder 10A of any one of the above forms or other forms (FIGS. 3A and 3B). Accordingly, the nut 20A with a nut holder can be used to complete the double nut fastening easily by using it as it is in the same manner as a single nut. An adhesive layer 13 is provided on the end surface a of the bush member 11 on the nut loading hole B2 side so that one-side operation can be performed. Further, the nut loading hole B2 is formed as a hexagonal hole that is in close contact with the hexagonal outer shape of the nut N1 to be loaded, and the nut N1 is press-fitted into the nut loading hole B2 with a considerable set pressure. Therefore, it does not fall off easily. In this case, the side surface c of the bush member 11 is difficult to be deformed due to the presence of the nut N1, and therefore the depth D1 of the nut loading hole B2 is set to be slightly larger than the thickness of the nut N1 to be loaded.

  In addition, in the nut 20A with a nut holder, since it is not necessary for the user to load the nut N1, the nut N1 to be loaded does not need to be a commercially available product, and a dedicated one designed on the provider side should be used. it can.

One Embodiment of the nut holder of this invention is shown, (A) is a whole perspective view, (B) is a center longitudinal cross-sectional view. It is operation | movement explanatory drawing in the said one Embodiment, (A) is a center longitudinal cross-sectional view before a deformation | transformation, (B) is a center longitudinal cross-sectional view after a deformation | transformation. The other embodiment of the nut holder of this invention is shown, (A) is a center longitudinal cross-sectional view, (B) is a bottom view. It is use condition explanatory drawing in the said embodiment. The other embodiment of the nut holder of this invention is shown, (A) is the center longitudinal cross-sectional view before a deformation | transformation, (B) is the center longitudinal cross-sectional view after a deformation | transformation. It is a center longitudinal cross-sectional view which shows other embodiment of the nut holder of this invention. It is a center longitudinal cross-sectional view which shows other embodiment of the nut holder of this invention. One Embodiment of a nut with a nut holder of this invention is shown, (A) is a center longitudinal cross-sectional view, (B) is a bottom view.

Explanation of symbols

A1 Diameter of nut loading hole M2 Base material to be bolted (one bolted material to be bolted)
M3 bolted material (the other bolted material)
N1 Nut N2 Flange nut B Stepped hole B1 Bolt hole B2 Nut loading hole B3 Screw hole D1 Nut loading hole depth 10A Nut holder 11 Bush member 12 Fixed screw plate 13 Adhesive layer 13a Release paper a End face b on the nut loading hole side End face c on the bolt hole side Side g Part of bush member 20A Nut with nut holder

Claims (6)

It is a nut holder used when bolting the bolted material with bolts and nuts,
A bush member having a stepped hole formed by integrally forming a nut loading hole to be loaded with a nut and a bolt hole through which the bolt penetrates, and a fixed screw plate with a screw hole to be fixed to an end surface of the bush member on the bolt hole side And
The bush member is formed of an elastic material, and the depth of the nut loading hole is set to a dimension that exceeds the thickness of the nut to be loaded, and a bolt that is loaded from the nut loading hole side with a part of the bush member interposed therebetween is loaded. A nut holder that is screwed into both the screw hole and the screw hole of the fixing screw plate.   2. The nut according to claim 1, wherein a diameter of the nut loading hole is set in a range that exceeds a diameter of an inscribed circle inscribed in a hexagonal outer shape of the nut to be loaded and is smaller than a diameter of a circumscribed circle inscribed in the hexagonal outer shape. holder.   3. The nut holder according to claim 1, wherein the bush member has a tapered outer shape in a direction of expanding from an end surface on the bolt hole side toward an end surface on the nut loading hole side.   The nut holder according to any one of claims 1 to 3, wherein an adhesive layer made of a pressure sensitive adhesive coated with release paper is formed on an end surface of the bush member on the nut loading hole side.   The nut holder according to any one of claims 1 to 4, wherein the elastic material forming the bush member is a rubber-based elastic material. A nut with a nut holder, wherein a nut is loaded into a nut loading hole of the nut holder according to any one of claims 1 to 5 .

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