JP7086782B2 - Bolt shaft fixture - Google Patents

Description

The present invention relates to a bolt shaft attachment that allows one end of a bolt shaft to be supported at an arbitrary angle with respect to a structure, and in particular, prevents runout of a spatially arranged object and fixes it to the structure. It concerns the bolt shaft fixtures used to do this.

A structure disclosed in Patent Document 1 is known as a structure in which the upper end portion of a hanging bolt is fixedly supported on the ceiling surface of a building. In this fixed support structure, a pair of half-split nut bodies having a two-split structure are inserted and arranged inside the fixture body, and the tip of the hanging bolt is inserted in the expanded state of the pair of half-split nut bodies. When the hanging bolt is pulled with the male threaded portion of the hanging bolt and the female threaded portion of the pair of half-split nut bodies locked, the pair of half-split nut bodies are formed into an inverted cone on the main body. The suspension bolt is screwed to the pair of half-split nut bodies without rotating a large number of them by being guided by the surface and moving downward and approaching.

However, in the above structure, since the half-split nut body is always regulated to rotate together, the bolt shaft is applicable when removing another nut or the like screwed to the lower end of the screwed bolt shaft. If it rotates together with another nut or the like, the upper end of the bolt shaft may loosen or come off.

Japanese Unexamined Patent Publication No. 2017-129238

The first object of the present invention is to regulate the co-rotation of the nut member so that the bolt shaft can be screw-rotated, and to allow the co-rotation of the nut member without loosening the screwing to the nut member. The second problem is to make it possible to incline and rotate the bolt shaft in any direction, and the second problem is to prevent the object to be spatially arranged by using multiple bolt shafts to prevent runout and to the structure. It is the provision of bolt shaft fixtures used for fixed placement.

The invention according to claim 1 for solving the above problems has an inner member having a nut portion into which a bolt shaft is screwed, and an opening into which the bolt shaft is inserted, so that the inner member cannot be pulled out. A nut member composed of an outer member having a storage space for movably accommodating the back side and the front side of the opening, and a nut member.
It consists of a fixing means for fixing the nut member to the structure.
The inner member is
By locating it on the back side of the opening in the accommodation space, it engages with the outer member and prevents the inner member from co-rotating due to the screw rotation of the bolt shaft.
By locating the inner member on the front side of the opening in the accommodation space, the engagement is released and the inner member and the bolt shaft can rotate together in the accommodation space. It is characterized by that.

According to the invention of claim 1, when the inner member is inserted from the opening of the outer member and the inner member is moved to the inner side of the opening, the inner member engages with the outer member and is described above. The co-rotation of the inner member due to the screw rotation of the bolt shaft (the relative rotation of the bolt and the nut while they are screwed together) is prevented.

Further, by pulling the bolt shaft with respect to the outer member while the inner member is screwed to the tip of the bolt shaft, the inner member is arranged on the front side of the opening in the accommodation space of the outer member. Then, the inner member is disengaged from the outer member, and the inner member and the bolt shaft can rotate together in the accommodation space.

According to a second aspect of the present invention, in the first aspect of the present invention, the inner member is engaged with the inner member at the back side of the opening in the accommodation space of the outer member, and the inner member is rotated by screwing the bolt shaft. The inner member is provided with a restricting portion for preventing co-rotation, and the inner member is disengaged from the restricting portion by locating the inner member on the front side of the opening in the accommodation space. There is.

According to the invention of claim 2, when the inner member accommodated in the accommodation space of the outer member is moved to the inner side of the opening, the inner member rotates together with the inner member provided in the inner side of the accommodation space. By engaging with the regulating portion to be regulated, the bolt shaft can be screwed and rotated with respect to the nut portion of the inner member without the inner member rotating together, and the inner member is screwed to the tip portion of the bolt shaft. Will be combined. Further, by locating the inner member on the front side of the opening in the accommodation space, the inner member is disengaged from the restricting portion and can rotate together with the bolt shaft.

The invention of claim 3 is the invention of claim 1 or 2, with respect to the reference arrangement position which is the arrangement position with respect to the outer member at the time of screw rotation of the bolt shaft in the co-rotation state. It is characterized by being able to be tilted in all directions.

In the invention of claim 3, the arrangement position of the bolt shaft with respect to the outer member at the time of screw rotation of the inner member of the bolt shaft with respect to the nut portion is defined as a reference arrangement position. In a state where the inner member is disengaged from the restricting portion of the outer member and the inner member is arranged on the front side of the opening in the accommodation space of the outer member, the bolt shaft is placed with respect to the reference arrangement position. Therefore, it can be tilted in all directions (innumerable radial directions of the bolt shaft at the reference placement position).

Therefore, according to the third aspect of the present invention, the nut member is fixed to the structure, and the inner member is disengaged from the outer member on the front side of the accommodation space of the outer member constituting the nut member. In the arranged state, the bolt shaft can be inclined and arranged in all directions with respect to the reference arrangement position. Therefore, the bolt shaft is spatially arranged and tilted by an optimum angle at an optimum position along the circumferential direction with respect to the outer member in relation to an object that requires runout prevention. The other end of the bolt shaft can be connected to the object to prevent the object from swinging.

The invention of claim 4 is the invention of any one of claims 1 to 3, wherein the inner member moves from a position where the inner member is engaged with the outer member by its own weight to a position where the engagement is released. It is characterized by having an engagement maintaining means for preventing the swelling.

According to the invention of claim 4, at the initial stage of screwing the bolt shaft to the inner member, the inner member is engaged with the outer member by the engagement maintaining means, so that the bolt is bolted to the inner member. The operation of screwing (screw rotation) of the bolt shaft to the inner member can be reliably performed without the operation of pushing the shaft into engagement.

The invention of claim 5 is characterized in that, in any of the inventions of claims 1 to 4, the fixing means is provided on the outer member and includes a fixing portion capable of fixing the outer member to a structure. There is.

In the invention of claim 5, since the outer member is provided with a fixing portion as a fixing means for fixing the nut member to the structure, the nut member is directly fixed to the structure via the fixing portion. Therefore, the number of parts as a bolt shaft mounting tool is reduced.

The invention of claim 6 is the invention of any one of claims 1 to 4, wherein the fixing means has a fixing portion that can be fixed to a structure, and is composed of a base member that is separate from the outer member. The nut member is characterized by having an assembly portion to be assembled to the assembly portion provided on the base member.

According to the sixth aspect of the present invention, the fixing means for fixing the nut member to the structure is composed of a base member separate from the outer member, and after fixing the base member to the structure, the base member By assembling the assembling portion of the nut member to the assembling portion, the nut member is assembled to the base member.

The invention of claim 7 is the invention of claim 6, wherein the base member has an accommodating space in which the nut member can be accommodated, and the nut member is pushed into the accommodating space from an opening. , It is characterized by being able to be assembled.

According to the invention of claim 7, after fixing the base member to the structure, the nut member is accommodated in the accommodation space of the base member by pushing the nut member through the opening of the base member. Since it is assembled to the base member, the nut member is screwed into the tip of the bolt shaft, the bolt shaft is held by hand, and the nut member at the tip is pushed into the base member for assembly. Therefore, the nut member can be easily assembled to the base member.

According to the present invention, when the inner member accommodated in the accommodation space of the outer member is moved to the inner side of the opening, the inner member is engaged with the outer member, so that the inner member rotates together. The bolt shaft can be screwed and rotated with respect to the nut portion of the inner member, and the inner member is screwed to the tip portion of the bolt shaft. In this state, by pulling the bolt shaft with respect to the outer member, the inner member is arranged on the front side of the opening in the accommodation space of the outer member, and the inner member engages with the outer member. When released, the inner member screwed to one end of the bolt shaft can rotate together with the bolt shaft in the accommodation space of the outer member.

It is an exploded perspective view of the inner member A and the outer member E constituting the nut member N. (A) and (b) are perspective views of the outer member main body E ₁ of the outer member E as viewed from different directions. (A) and (b) are cross-sectional views taken along the line U1 _- U1 and U2 _- U2 of _FIG . ₂ (a). (A) and (b) are perspective views of the regulating portion forming body E ₂ constituting the outer member E, respectively, viewed from different directions. (A) and (b) are cross _- sectional views taken along the line X1 _- X1 and line X2 _- X2 of _FIG . 4 (a). It is sectional drawing which shows the assembly structure by the engagement of the outer member main body E ₁ which constitutes the outer member E, and the regulation part forming body E ₂ . (A) is a plan view of the inner member A, and (b) and (c) are perspective views of the inner member A viewed from different directions. (A) is a cross-sectional view of a position where both portions of the restricting portion engaging groove 2 and the meat stealing portion 4 of the inner member A are broken, and (b) is a position where both portions are not broken. It is a cross-sectional view of. (A) is a cross-sectional view of a position where the regulating portion 25 of the inner member A is fitted in the regulating portion engaging groove 2 of the outer member E, and (b) is a cross-sectional view taken along the line YY of (a). It is a figure. It is a perspective view of the separated state of a nut member N and a base member V. (A) and (b) are cross-sectional views of Z ₁ -Z ₁ line and Z ₂ -Z ₂ line of FIG. 10, respectively. In (a) and (b), the bolt shaft B is screw-rotated with respect to the inner member A by preventing the inner member A from rotating together, and the screw rotation becomes impossible. (C) is a cross-sectional view of the bolt shaft B in a state where the inner member A screwed to the tip thereof can rotate together with the bolt shaft B. It is a perspective view which shows the state which presses and assembles the nut member N with respect to the base member V fixed to the wall surface Wa of a concrete ceiling wall W. It is also a cross-sectional view. It is sectional drawing of the state in which the nut member N is assembled with respect to the base member V. It is a perspective view of a similar state. It is a front view of the state in which the object K spatially arranged by using the bolt shaft attachment S according to the present invention is prevented from swinging and fixed.

Hereinafter, the present invention will be described in more detail with reference to examples. As shown in FIGS. 11 to 15, the bolt shaft attachment S of the present invention comprises a base member V fixed to the concrete ceiling wall W and a nut member N into which the tip of the bolt shaft B is screwed. Become. As shown in FIGS. 1 and 11, the nut member N is composed of a spherical inner member A and an outer member E that houses the inner member A inside, and further, the outer member E is an outer member. After accommodating the inner member A in the accommodating space 14 of the main body E ₁ and the outer member main body E ₁ , the outer member main body E ₁ is closed with the second opening 16 of the outer member main body E ₁ closed. It consists of a regulatory unit forming body E ₂ that is integrally assembled. The restricting portion forming body E ₂ prevents co-rotation with the inner member A accommodated in the accommodation space 14 of the outer member main body E ₁ and enables the screw rotation of the bolt shaft B with respect to the inner member A. It is a member for forming the regulation portion 25. The base member V, the inner member A, the outer member main body E ₁ and the regulation portion forming body E ₂ are all formed by injection molding of resin. One end of the bolt shaft in the present invention is fixedly supported by a structure in order to prevent the object from swinging, and a typical example thereof is a "cutting bolt (long screw)" having a relatively long length. Is.

As shown in FIGS. 1, 7, and 8, the inner member A constituting the nut member N has a spherical shape as a whole, and has a diameter of about half the diameter of the sphere in only one place of the whole. By forming a female screw on the inner peripheral surface of the screw hole having the bolt shaft B, a non-penetrating nut portion 1 in which the tip end portion of the bolt shaft B is screwed is formed. The axial center C ₁ of the nut portion 1 passes through the center C ₀ of the spherical inner member A, and is a portion of the portion obtained by bisecting the sphere on a plane perpendicular to the axial center C ₁ of the nut portion 1. In the hemispherical portion where the non-penetrating portion of the nut portion 1 exists, a large number (12 in the example) of the restricting portion engaging grooves 2 having a right-angled cross section and a predetermined width are circumferentially oriented. It is formed at equal intervals along the line. As shown in FIG. 8A, when the sphere is broken through the axial center C ₁ of the nut portion 1 and at the portion where the restricting portion engagement groove 2 is broken, the sphere is located at the center C ₀ of the sphere. A large number of restricting portion engaging grooves 2 are formed with respect to the sphere so that the right-angled portion of the restricting portion engaging groove 2 having a right-angled triangle shape exists in the nearest portion. Further, the spherical surface portion arranged on the outer peripheral surface of the formed end portion of the nut portion 1 and surrounded by a large number of restricting portion engaging grooves 2 is an annular contact described later formed on the regulating portion forming body E ₂ . The contact spherical surface 3 abuts on the portion 26. It should be noted that the hemisphere in which a large number of restricting portion engaging grooves 2 are formed and another hemisphere also have a large number of vacant spaces having a symmetrical shape with the restricting portion engaging grooves 2. The large number of vacant spaces prevents the position of the center of gravity of the entire sphere from being significantly unevenly distributed from the center C ₀ of the sphere, in order to improve the arrangement balance of the spherical inner member A in the accommodation space 14 of the outer member E. The meat stealing part 4 of the above is shown.

As shown in FIGS. 1 to 5, the outer member E closes the outer member main body E ₁ and the second opening 16 into which the spherical inner member A is inserted, and accommodates the outer member E. It is composed of a regulating portion forming body E ₂ for forming the regulating portion 25 inside the 14. The outer member main body E ₁ is formed by a pair of plate-shaped elastic pieces 12 facing each other in a cantilevered support shape on the facing portion of the outer peripheral portion of the small diameter portion 11a of the step short cylindrical portion 11. An assembly claw 13 is formed on the outer side of the 12 over the entire length of the elastic piece 12 in the width direction. As shown in FIG. 3A, the elastic pieces 12 are gradually spaced from the base end portion to the tip end portion (free end portion) with respect to the axial center C ₂ of the step short cylindrical portion 11. It is formed so as to be wide. The space inside the stepped short cylindrical portion 11 is a penetrating accommodation space 14 for accommodating the inner member A, and the opening on the tip end side of the elastic piece 12 in the accommodation space 14 is the bolt shaft. The opening on the opposite side is the first opening 15 into which B is inserted, and the opening on the opposite side is the second opening 16 into which the inner member A is inserted. The accommodation space 14 is formed in a hollow step columnar shape, and the inner diameter on the side of the first opening 15 corresponds to the diameter D of the inner member A, contrary to the step state of the step short cylindrical portion 11. At the same time, the inner diameter on the side of the second opening 16 is formed to be larger than the diameter D of the inner member A.

Further, as shown in FIG. 3, the inner peripheral surface of the portion of the accommodation space 14 connected to the first opening 15 is the inner surface thereof in order to prevent the inner member A from coming out of the first opening 15. With the divided spherical surface contact surface 14a on which the divided spherical surface of the member A (the outer peripheral spherical surface of the disk-shaped divided sphere divided by different divided surfaces perpendicular to the specific center line passing through the center of the sphere) can be closely attached over the entire circumference. It has become. The portion of the large-diameter portion 11b of the stepped short cylindrical portion 11 connected to the divided spherical contact surface 14a of the accommodation space 14 is a chamfered surface 17.

A pair of assembling claws 27 of the restricting portion forming body E ₂ are engaged with the base end portion of the pair of elastic pieces 12 in the large diameter portion 11b of the stepped short cylindrical portion 11 in an inserted state, and the outer member main body E is engaged. An assembly hole 18 for assembling the regulation portion forming body E ₂ is formed with respect to ₁ . Further, the inner surface of the base end portion of the elastic piece 12 in the outer member main body E ₁ and the surface connected to the assembly hole 18 is for assembling the restricting portion forming body E ₂ to the outer member main body E ₁ . At that time, the assembling claw 27 described later is brought into contact with the elastic piece 23 to facilitate the elastic deformation of the elastic piece 23 described later, and the elastic deformation auxiliary inclined surface 19 is provided. The lower end portion of the elastic piece 12 is arranged so as to sandwich the engaged plate portion 34 of the base member V with the assembling claw 13 in a state where the nut member N is assembled to the base member V. After the unlocking plate 20 is provided and the nut member N is assembled to the base member V, a force in a direction close to each other is applied to each unlocking plate 20 to put the pair of elastic pieces 12 inside. To release the lock between the locked plate portion 34 of the base member V and the assembly claw 13 of the outer member main body E ₁ constituting the nut member N, the base member V and the nut member N are formed. Disassemble the assembly.

Further, the restricting portion forming body E ₂ that closes the second opening 16 after accommodating the inner member A in the accommodating space 14 of the outer member main body E ₁ through the second opening 16 is in charge of the regulating portion of the inner member A. In addition to the original function of forming a restricting portion 25 that is inserted into and engaged with the joint groove 2 to prevent co-rotation of the inner member A when the bolt shaft B is screwed with respect to the nut portion 1 of the inner member A. It also has a function as a lid, and as shown in FIGS. 1, 4 to 6 and 9, a pair of arc wall portions 22 face each other on the outer peripheral edge portion of the back surface of the lid plate portion 21. The pair of elastic pieces 23 are formed so as to face each other along a direction orthogonal to the facing direction of the pair of arc wall portions 22. The central portion of the pair of arc wall portions 22 along the arc direction of the opposing inner peripheral surfaces, and the portion from the tip portion to the central portion along the direction perpendicular to the lid plate portion 21 is the accommodation space 14. In order to make it possible to arrange a part of the spherical inner member A arranged at the inner end of the spherical surface without interfering with each other, spherical recesses 24 corresponding to a part of the spherical surface of the spherical inner member A are formed. In each spherical recess 24, two protrusions that are inserted and engaged with two restricting portion engaging grooves 2 formed adjacent to each other among a large number of restricting portion engaging grooves 2 formed in the inner member A. Each of the regulated portions 25 is formed (see FIG. 9).

Further, a part of the spherical contact spherical surface 3 of the inner member A arranged at the inner end of the accommodation space 14 is brought into contact with the central portion of the back surface of the lid plate portion 21 of the regulation portion forming body E ₂ . Therefore, an annular contact portion 26 for determining the position of the inner end of the inner member A is formed so as to project. Since the inner member A abuts on the annular end surface of the annular contact portion 26, the contact spherical portion 26a of the spherical inner member A on the annular end surface is chamfered so as to be a part of the spherical surface. The lower end of the outer surface of the pair of elastic pieces 23 is inserted and engaged from the inside into each assembly hole 18 formed so as to face the small diameter portion 11a of the stepped short cylindrical portion ₁₁ of the outer member main body E1. An assembly claw 27 to be in a state is formed. As shown in FIG. 6, the outer member main body E ₁ is engaged with each assembly claw 27 of the regulation portion forming body E ₂ in the inserted state into each assembly hole 18 of the outer member main body E ₁ . And the regulation portion forming body E ₂ are integrally assembled, and the second opening 16 of the outer member main body E ₁ is covered with the regulation portion forming body E ₂ . In FIG. 6, A (1) and A (2) are inner members A at the inner end and the front end of the accommodation space 14 formed by the outer member main body E ₁ and the restricting portion forming body E ₂ , respectively. Indicates the state in which is placed. In addition, in FIG. 1, 10 shows a large number of meat stealing grooves provided in the large diameter portion 11b of the outer member main body E ₁ in the stepped surface with the small diameter portion 11a in the axial direction, and is shown in FIG. , 28 indicate a pair of meat stealing grooves provided by opening on the upper surface of the lid plate portion 21 in the portion of the pair of arc wall portions 22 of the regulation portion forming body E ₂ .

As shown in FIGS. 10 and 11, the base member V is a tapered cylinder whose outer diameter is slightly smaller on the side of the nut member insertion opening 31 into which the nut member N is inserted than on the side of the fixing plate portion 32. The outer peripheral wall portion 33 is provided, and the locked plate portion 34 for inserting and locking the assembling claw 13 of the nut member N is formed in the facing portion on the outer peripheral surface of the outer peripheral wall portion 33. The flat wall-shaped outer wall portion 35 has a larger inclination angle than the outer peripheral wall portion 33, and protrudes outward from the outer peripheral wall portion 33, and is formed over the entire height of the outer peripheral wall portion 33. A flat wall-shaped inner wall portion 37a is also formed inside the outer wall portion 35 via the meat stealing space portion 36, and the outer wall portion 35 and the inner wall portion 37a are in the width direction (periphery of the outer peripheral wall portion 33). It is connected by connecting wall portions 38 at both ends of the direction). Therefore, each of the inner wall portions 37a arranged to face each other is arranged in parallel with the axial center C ₃ of the nail insertion hole 45 described later. The end of each inner wall portion 37a on the side of the nut member insertion opening 31 is missing, and the assembly claw insertion opening 41 for inserting the assembly claw 13 of the nut member N into the meat stealing space portion 36. It has become. The assembly claw insertion opening 41 communicates with the lower end portion of the meat stealing space portion 36.

A cylindrical inner peripheral wall portion 37b is provided on the inside of the outer peripheral wall portion 33 except for each inner wall portion 37a via a meat stealing space portion 42. The inner peripheral wall portion 37b is formed only between the fixing plate portion 32 and the intermediate portion in the height direction of the outer peripheral wall portion 33, and the inner end portion of the inner peripheral wall portion 37b and the inner circumference of the outer peripheral wall portion 33. The surface is connected at right angles via the stepped wall portion 43. The space formed by the inner wall portion 37a and the inner peripheral wall portion 37b of the base member V and the outer peripheral wall portion 33 connected to the inner peripheral wall portion 37b is a storage space 44 for the nut member N.

A nail insertion hole 45 is formed through the axial center position of the cylindrical inner peripheral wall portion 37b in the fixed plate portion 32, and a gas combustion type nailing machine (gas combustion type nailing machine) is formed on the back surface of the fixed plate portion 32. (Not shown), when the base member V is fixed by using one nail G, the sleeve 46 through which the nail G is inserted is formed concentrically with the nail insertion hole 45. A plurality of rib pieces 47 are formed on the outer periphery of the sleeve 46 over the entire height along the circumferential direction, and a regulation wall 48 is provided on the outside of each rib piece 47 on the back surface of the fixing plate portion 32. When the nail G is driven into the concrete ceiling wall W by a gas combustion type nailing machine, the sleeve 46 and each rib piece 47 become a crushed lump 51 (see FIG. 14) and become the regulation wall. It is housed inside 48. In FIG. 12, 49 is for holding the base member V with respect to the concrete ceiling wall W so as not to shift laterally before fixing the base member V to the concrete ceiling wall W with one nail G. A plurality of slip-preventing protrusions formed so as to project from the upper surface of the fixing plate portion 32 are shown.

Next, a method of preventing runout and spatially arranging the object K by using the bolt shaft attachment S described above will be described. First, as shown in FIG. 6, the inner member A is accommodated and arranged in the accommodation space 14 of the outer member E to form the nut member N. That is, after the spherical inner member A is accommodated and arranged in the internal accommodation space 14 through the second opening 16 of the outer member main body E ₁ , a restricting portion is formed in the second opening 16 of the outer member main body E ₁ . When the body E ₂ is arranged and pressed as it is, each assembly claw 27 formed on the outside of the lower end portion of the pair of elastic pieces 23 of the restricting portion forming body E ₂ is elastically deformed by the outer member main body E ₁ . By being guided to the auxiliary inclined surface 19, each elastic piece 23 is elastically deformed inward, and when it reaches each assembly hole 18, each elastic piece 23 is restored to its original shape, and the regulation portion forming body E When each assembly piece 27 of ₂ is inserted and engaged with each assembly hole 18 of the outer member main body E ₁ , the second opening 16 of the outer member main body E ₁ is covered with the restricting portion forming body E ₂ . Will be done. In this state, as shown in FIG. 6, the spherical inner member A housed and arranged in the housing space 14 of the outer member E has reference numeral A (1) with respect to the first opening 15 of the outer member E. It is movable between the rear end shown and the front end indicated by reference numeral A (2).

Here, in order to enable the bolt shaft B to be screwed to the nut portion 1 of the inner member A constituting the nut member N by the screw rotation of the bolt shaft B, as shown in FIG. The inner member A is arranged at the inner end A (1), and the contact spherical surface 3 of the inner member A is in contact with the contact spherical portion 26a of the annular contact portion 26 of the restricting portion forming body E ₂ . , The restricting portion 25 formed in the restricting portion forming body E ₂ is inserted into the specific regulating portion engaging groove 2 among the many restricting portion engaging grooves 2 of the inner member A to maintain the engaged state. Therefore, it is necessary to arrange the axial center C ₁ of the nut portion 1 of the inner member A perpendicularly to the lid plate portion 21 of the restricting portion forming body E ₂ . As a means for maintaining the above-mentioned engaged state, the dimensions of the inner member A are such that the regulated portion 25 of the regulated portion forming body E ₂ is inserted and engaged with the regulated portion engaging groove 2 in the press-fitted state. A method of designing the above, or a method of maintaining the insertion engagement state of the regulation portion 25 of the regulation portion forming body E ₂ with respect to the regulation portion engagement groove 2 of the inner member A by an adhesive, double-sided tape, or the like. ..

Then, as shown in FIG. 12A, the inner member A is arranged at the inner end A (1) of the accommodation space 14 of the outer member E, and the inner member A is moved by the screw rotation of the bolt shaft. The bolt shaft B is inserted into the accommodation space 14 from the first opening 15 of the outer member E without rotating together, and the tip end portion of the bolt shaft B is screwed into the nut portion 1 of the inner member A. , The bolt shaft B is screw-rotated with respect to the inner member A. As shown in FIG. 12B, when the bolt shaft B is screwed into all the female threaded portions of the nut portion 1 by the screw rotation of the bolt shaft B, the screw rotation of the bolt shaft B is impossible. Will be. In this state, when the bolt shaft B is pulled with respect to the nut member N, the inner member A moves in the accommodation space 14 until it comes into contact with the split spherical contact surface 14a in the accommodation space 14 of the outer member E. As shown in FIG. 12 (c), each regulating portion 25 of the regulating portion forming body E ₂ is relatively disengaged from the regulating portion engaging groove 2 of the inner member A, and the bolt is concerned. The inner member A screwed to the tip end portion of the shaft B can rotate together with respect to the bolt shaft B. In FIG. 12, the lower end portion of the elastic piece 12 of the outer member main body E ₁ that appears on the back surface of the bolt shaft B is not shown.

As described above, the nut member N attached to the tip of the bolt shaft B in a screwed state is integrally assembled with the base member V previously fixed to the wall surface Wa of the concrete ceiling wall W. The base member V is fixed to the concrete ceiling wall W by one nail G. That is, one nail inserted into the sleeve 46 by the impact force generated by the gas combustion of the gas combustion type nailing machine in a state where the fixing plate portion 32 of the base member V is in close contact with the wall surface Wa of the concrete ceiling wall W. When G is placed on the concrete ceiling wall W, the nail G is fitted by rapidly expanding the concrete ceiling wall, which is the base material, to the surroundings, and is driven by the reaction force of the base material to return to its original state. By tightening the periphery of the nail G, the nail G is fixed to the base material with a large tightening force.

Then, as shown in FIGS. 13 and 14, the bolt shaft B to which the nut member N is attached to the tip portion is held by the operator directly under the base member V fixed to the concrete ceiling wall W. When the nut member N at the tip portion is pressed toward the accommodation space 44 of the base member V, the inner member A abuts on the plurality of regulating portions 25 provided on the outer member E inside the nut member N. The outer member E constituting the nut member N is pressed against the accommodation space 44 of the base member V. Each assembly claw 13 of the outer member E slides on the inclined inner end surface 34a of the base member V, so that the pair of elastic pieces 12 of the outer member E are slightly elastically deformed inward, and then the base member V is subjected to the elastic deformation. It is inserted into the lower end of the meat stealing space 36 through the assembly claw insertion opening 41, locked to each locked plate 34 of the base member V, and as shown in FIG. 15, with respect to the base member V. The nut member N is integrally assembled. At the time of the above assembly, each of the unlocking plates 20 of the outer member E abuts on the lower end surface of each locked plate portion 34 of the base member V, so that the nut is provided with respect to the accommodation space 44 of the base member V. The member N is prevented from being excessively inserted.

In the above embodiment, the nut member N is previously attached to the tip of the bolt shaft B at the operator's hand, the lower end side of the bolt shaft B is held by hand, and the tip of the bolt shaft B is held. The nut member N attached to the bolt is simply pushed into the accommodation space 44 of the base member V fixed to the concrete ceiling wall W, that is, the bolt shaft B is not screwed and rotated, and the bolt is bolted to the concrete ceiling wall W. Since the shaft B can be suspended, there is an advantage that the bolt shaft B can be easily suspended.

When the nut member N is assembled to the base member V as described above, as shown in FIGS. 15 and 16, the outer member of the bolt shaft B at the time of screw rotation of the inner member A with respect to the nut portion 1 When the arrangement position with respect to E is defined as the reference arrangement position [arrangement position indicated by B (0) in FIG. 15], the spherical inner member A with respect to the divided spherical contact surface 14a of the accommodation space 14 of the outer member E. Since the bolt shaft B can be arranged in any direction, the bolt shaft B can be arranged at an angle in all directions with respect to the reference arrangement position. The bolt shaft B can be tilted up to a maximum tilt angle (θ) at which the base end portion connected to the inner member _A abuts on the chamfered surface 17 of the outer member main body E1.

Therefore, as shown in FIG. 17, a plurality of bolt shafts B arranged at the inclined arrangement position and the reference arrangement position with respect to the outer member E are mounted on a concrete ceiling by using the bolt shaft attachment S according to the present invention. By suspending the bolt shaft B in combination from the wall W and connecting the inclined lower end portion or the lower end portion of the bolt shaft B to the object K, the spatially arranged object K can be fixedly arranged by preventing the object K from swinging. Two bolt shafts B and B'arranged on the same axis at the inclined arrangement position and having a reverse screw relationship with each other are connected to the connecting body 61 to form a turnbuckle 62. Note that, in FIG. 17, reference numeral 63 denotes a bracket attached to the object K in order to connect the inclined end portions of the bolt shaft B'constituting the turnbuckle 62.

Further, in the above embodiment, as a means for preventing co-rotation of the bolt shaft B with respect to the inner member A at the time of screw rotation, a plurality of restrictions which are engaging portions formed on the inner side of the accommodation space 14 of the outer member E. The portion 25 is composed of a large number of restricting portion engaging grooves 2 provided in the inner member A, which is an engaged portion to which the engaging portion is engaged, and the co-rotation preventing means is provided. The combination is not limited to the combination of the regulation portion 25 and the regulation portion engagement groove 2 described above. As other means for preventing co-rotation, a short-angle cylinder portion (engaged portion) formed in the inner member and a short-angle hole portion (engaged portion) into which the short-angle cylinder portion is inserted in an engaged state. It may be a combination of.

In the above embodiment, in order to fix the nut member N to the concrete ceiling wall W which is a structure, a base member V separate from the nut member N is used, but the outer member constituting the nut member N is used. A fixing portion that can be fixed to the concrete ceiling wall W may be directly formed on the outer member main body E ₁ of E, and the fixing portion may be fixed to the concrete ceiling wall W.

Further, in the above embodiment, the bolt shaft B is screw-rotated with respect to the inner member A constituting the nut member N at the operator's hand, and the nut member N is attached to the tip of the bolt shaft B. In this state, simply by holding the lower end of the bolt shaft B and pushing the nut member N at the tip of the bolt shaft B into the accommodation space 44 of the base member V previously fixed to the concrete ceiling wall W, the concrete ceiling The bolt shaft B is suspended from the wall W, and the work of suspending the bolt shaft B is easy. However, a nut member fixed to the concrete ceiling wall W like the conventional suspension of a bolt shaft. The bolt shaft B may be screw-rotated with respect to the inner member A constituting N to suspend the bolt shaft B with respect to the concrete ceiling wall W.

A: Inner member B: Bolt shaft E: Outer member E ₁ : Outer member body E ₂ : Regulatory part forming body N: Nut member S: Bolt shaft fixture V: Base member W: Concrete ceiling wall (structure)
1: Nut part 2: Restriction part engaging groove 14: Housing space for outer member 15: First opening (opening) of outer member
25: Control part of outer member 31: Nut member insertion opening (opening) of base member
44: Storage space for base member

Claims (7)

It has an inner member having a nut portion into which the bolt shaft is screwed, and an opening into which the bolt shaft is inserted, and the inner member can be moved to the back side and the front side of the opening portion without coming off. An outer member having a storage space to be accommodated in, a nut member composed of, and
It consists of a fixing means for fixing the nut member to the structure.
The inner member is
By locating it on the back side of the opening in the accommodation space, it engages with the outer member and prevents the inner member from co-rotating due to the screw rotation of the bolt shaft.
By locating the inner member on the front side of the opening in the accommodation space, the engagement is released and the inner member and the bolt shaft can rotate together in the accommodation space. Bolt shaft fixture characterized by that. On the inner side of the opening in the accommodation space of the outer member, a regulating portion is provided which engages with the inner member to prevent the inner member from co-rotating due to the screw rotation of the bolt shaft. The bolt shaft attachment according to claim 1, wherein the inner member is disengaged from the restricting portion by locating the member on the front side of the opening in the accommodation space. Claim 1 is characterized in that, in the co-rotation state, the bolt shaft can be tilted in all directions with respect to a reference placement position which is a placement position with respect to the outer member when the bolt shaft is screwed. Or the bolt shaft attachment according to 2. The inner member is characterized by having an engagement maintaining means for preventing the inner member from moving from a position where the inner member is engaged with the outer member to a position where the engagement is released due to its own weight. The bolt shaft attachment according to any one of claims 1 to 3. The bolt shaft attachment according to any one of claims 1 to 4, wherein the fixing means is provided on the outer member and includes a fixing portion capable of fixing the outer member to a structure. The fixing means has a fixing portion that can be fixed to the structure, and is composed of a base member that is separate from the outer member, and the nut member is attached to an assembled portion provided on the base member. The bolt shaft attachment according to any one of claims 1 to 4, wherein the bolt shaft attachment has an assembly portion to be assembled. 6. The base member has an accommodating space inside which the nut member can be accommodated, and can be assembled by pushing the nut member into the accommodating space from an opening. Bolt shaft fixture as described in.

Images