JP2020100961A - Bolt support unit - Google Patents

Abstract

To provide a bolt support unit capable of improving installation workability of a fastener to a bolt, improving installation accuracy, and increasing load bearing capacity.SOLUTION: A bolt support unit 1 includes a bolt 3 having a first male screw part 3a, and a fastener 5 fixed to the bolt 3. The fastener 5 has: an opening/closing sleeve 20 having a body 21 which can be opened and closed in a circumferential direction of the bolt 3, a first female screw part 22 formed on an inner peripheral surface of the body 21, and a connecting surface 23 formed on an outer peripheral surface of the body 21, and capable of engaging the first female screw part 22 with the first male screw part 3a from an intersecting direction X intersecting a screwing direction Y with respect to the first male screw part 3a by closing the body 21 from an opened state; and a fixing member 10 having a fixed inner peripheral surface 11 having a diameter larger than that of the bolt 3, and engaging the first female screw part 22 with the first male screw part 3a to fix the opening/closing sleeve 20 to the bolt 3 by connecting the fixed inner peripheral surface 11 to the connecting surface 23 with the body 21 closed.SELECTED DRAWING: Figure 3

Description

The present invention relates to a bolt supporting unit, and more particularly to a bolt supporting unit having a stopper fixed to a bolt.

For example, in order to attach a field rim to a building foundation in a room such as light weather, it is necessary to provide a hanger for supporting the ceiling frame. For that purpose, a suspension bolt equipped with a hanger is fixed to the ceiling. However, the suspension bolt may be long, for example, about 2 m. Therefore, the worker must rotate the nut for fixing the hanger to the suspension bolt repeatedly and screw the nut to the fixed position of the hanger, which deteriorates the workability of the construction.

Therefore, in Patent Document 1, the tip of the suspension bolt is formed into a conical shape so that the suspension bolt can be easily screwed into the nut. Further, as a hanger stopper for the suspension bolt, a mode is disclosed in which the suspension bolt is sandwiched between a base portion having a screw groove and a clip portion.

Utility model registration No. 3084062

In Patent Document 1, the weight of the object suspended on the hanger is applied to the engaging portion between the base portion and the clip portion before being applied to the suspension bolt. Therefore, the engaging portion of the stopper is required to have a withstand load capable of withstanding the weight of the object suspended on the hanger. However, since the engaging portion is formed by sandwiching the clip portion with the base portion, a large load bearing capacity cannot be expected for the bolt support unit.

Therefore, it is possible to increase the withstand load of the bolt support unit by using a so-called double nut for the stopper. In this case, a support member such as a hanger is vertically sandwiched by two nuts and fixed to the bolt. Further, by adjusting the fastening position of each nut, it is possible to adjust the position of the support member with respect to the bolt, the height of protrusion of the bolt from the support member, and the centering.

However, since the worker has to repeatedly rotate the two nuts to the fixing position of the bolt to the support member while screwing the nut, the workability of installing the bolt is still deteriorated.
In addition, the support member must be fixed to the bolt or the bolt must be fixed to the support member by the simultaneous work of tightening the support member with the double nut while adjusting the height of the bolt by screwing the double nut. .. Therefore, the burden on the operator is increased, the position of the support member with respect to the bolt, the protruding height and the centering of the bolt from the support member are likely to vary, and the installation accuracy of the bolt support unit may be reduced.

The present invention has been made in view of the above problems, and an object thereof is to provide a bolt support unit capable of improving the installation workability of a stopper for a bolt, improving the installation accuracy, and increasing the withstand load. To do.

In order to achieve the above object, a bolt having a first male screw portion and a stopper fixed to the bolt are provided, and the stopper is formed on a main body that can be opened and closed in the circumferential direction of the bolt, and an inner peripheral surface of the main body. A first female screw portion having a coupling surface formed on the outer peripheral surface of the main body, and by closing the main body from the open state, the first female screw portion is moved from the crossing direction intersecting the screw advancing direction to the first male screw portion to 1 has an opening/closing sleeve engageable with the male screw portion and a fixed inner peripheral surface having a diameter larger than that of the bolt, and by coupling the fixed inner peripheral surface to the coupling surface in a state where the main body is closed, the first female screw portion is And a fixing member that engages with the first male screw portion and fixes the opening/closing sleeve to the bolt.

Preferably, the support further includes a support member having an insertion hole through which the bolt is inserted, and the stopper fixes the support member by sandwiching the support member between the opening/closing sleeve and the fixing member in a state where the bolt is inserted into the insertion hole.
Preferably, the insertion hole has an engaging portion to be engaged with the first male screw portion at an opening edge thereof.
Preferably, the fixing member has a second female screw portion on a fixed inner peripheral surface thereof, and the opening/closing sleeve has a second male screw portion capable of being screwed with the second female screw portion in a state where the main body is closed on the coupling surface.

Preferably, the first female threaded portion has the same thread pitch as the first male threaded portion.
Preferably, the main body is composed of a pair of halves divided in the circumferential direction of the bolt.
Preferably, each half body has a circumferential end surface facing each other in the closed state of the main body, and a fitting portion for fitting the end surfaces to each other in the closed state of the main body.
Preferably, the main body has a connecting portion that connects the respective halves so as to be openable and closable in the circumferential direction.

According to the bolt support unit of the present invention, it is possible to improve the workability of installing the stopper on the bolt, improve the installation accuracy, and increase the withstand load.

It is a perspective view showing the state where the bolt support unit concerning a 1st embodiment of the present invention suspended the ceiling frame. It is a perspective view which expanded the bolt support unit. (A): It is the assembly view which looked at the bolt support unit of FIG. 2 from the side, (b): The top view of a nut, (c): The bottom view of an opening/closing sleeve. (A)-(c): It is explanatory drawing of the procedure of installing the bolt support unit of FIG. It is a side view of the bolt support unit containing the hanger which is a modification of FIG. It is the state where the main body of the opening/closing sleeve which is a modification of FIG. 2 is opened, (a): a top view, (b): an inside view. It is a perspective view showing a state where a bolt support unit concerning a 2nd embodiment of the present invention fixed a bolt to a support plate. FIG. 8A is an assembly view of the bolt support unit of FIG. 7 viewed from the side, FIG. 8B is a top view of the cap, and FIG. 8C is a bottom view of the opening/closing sleeve. (A)-(c): It is explanatory drawing of the procedure of installing the bolt support unit of FIG. It is a side view of the cover which is a modification of a fixed member. It is a side view of a cap which is a modification of a fixed member.

Hereinafter, a bolt support unit according to each embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 shows a perspective view of a state in which a bolt support unit 1 suspends a ceiling frame 2. The ceiling frame 2 is provided below a building base such as an eaves ceiling not shown, and a ceiling panel not shown is arranged. The ceiling frame 2 is supported on a building base by a plurality of bolt support units 1.

FIG. 2 shows an enlarged perspective view of the bolt support unit 1. The bolt support unit 1 includes a long bolt 3 of, for example, about 2 m extending from a building base, a hanger (support member) 4 on which the ceiling frame 2 is suspended, and a stopper 5 for fixing the hanger 4 to the bolt 3. It has and. The hanger 4 has a bent shape, and has a hook 6 for suspending the ceiling frame 2 and a fixing portion 7 fixed to the bolt 3.

The stopper 5 is composed of a nut (fixing member) 10 and an opening/closing sleeve 20. The fixing portion 7 of the hanger 4 is fixed to the bolt 3 by being sandwiched by the nut 10 arranged on the upper side of the fixing portion 7 and the opening/closing sleeve 20 arranged on the lower side of the fixing portion 7.

FIG. 3 shows (a) an assembly view of the bolt support unit 1 viewed from the side, (b) a top view of the nut 10, and (c) a bottom view of the opening/closing sleeve 20. It should be noted that, since the assembly drawing is bilaterally symmetric when viewed in the drawings, a part of the left side from the center line is shown in a cross section for the sake of description, and the assembly drawings shown below are also the same.

The bolt 3 has a first male screw portion 3a over the entire area in the axial direction, for example. The opening/closing sleeve 20 has a main body 21 that can be opened and closed in the circumferential direction of the bolt 3, a first female screw portion 22 formed on, for example, the entire inner peripheral surface of the main body 21, and a coupling surface 23 formed on the outer peripheral surface of the main body 21. doing. By closing the main body 21 from the open state, the first female threaded portion 22 can be engaged with the first male threaded portion 3a in the intersecting direction X that intersects the screwing direction Y with respect to the first male threaded portion 3a.

The nut 10 has a fixed inner peripheral surface 11 having an inner diameter di larger than the diameter Db of the bolt 3, and by connecting the fixed inner peripheral surface 11 to the connecting surface 23 in a state where the main body 21 is closed, The first female screw portion 22 is engaged with the first male screw portion 3 a to fix the opening/closing sleeve 20 to the bolt 3.
The fixing portion 7 of the hanger 4 has an insertion hole 7a into which the bolt 3 is inserted. The fixing portion 7 is sandwiched between the opening/closing sleeve 20 and the nut 10 with the bolt 3 inserted in the insertion hole 7 a.

The opening/closing sleeve 20 has a second male screw portion 24 on the coupling surface 23. The nut 10 has a second female screw portion 12 on the fixed inner peripheral surface 11. Then, with the main body 21 closed, the second female screw portion 12 of the nut 10 can be screwed into the second male screw portion 24 of the opening/closing sleeve 20. Further, the main body 21 is formed with a large-diameter portion 25 having a diameter larger than that of the joining surface 23 continuously from the joining surface 23. The large diameter portion 25 has a hexagonal prism shape.

The hole diameter dh of the insertion hole 7a is larger than the diameter Db of the bolt 3 and the outer diameter Dc of the coupling surface 23, but smaller than the outer diameter De of the large diameter portion 25. Further, the screw pitch of the first female screw portion 22 is formed to be the same as that of the first male screw portion 3 a of the bolt 3. The main body 21 is composed of a pair of half-divided bodies 26 and 27 divided in the circumferential direction of the bolt 3.

A concave portion (fitting portion) 26a and a convex portion (fitting portion) 26b are formed on both end surfaces in the circumferential direction of the half-split body 26, respectively. A concave portion (fitting portion) 27a and a convex portion (fitting portion) 27b are formed on both end surfaces in the circumferential direction of the half-split body 27, respectively. The recess 26a can be fitted to the protrusion 27b, and the recess 27a can be fitted to the protrusion 26b in a state in which both circumferential end surfaces of the half halves 26, 27 are opposed to each other.

Hereinafter, the construction procedure for installing the bolt support unit 1 will be described with reference to FIGS. First, as shown in FIG. 4A, at the fixing position of the opening/closing sleeve 20 on the bolt 3, the bolt 3 is sandwiched by the half-split bodies 26 and 27 from the crossing direction X. That is, from the state in which the main body 21 is opened, in other words, the half-divided bodies 26 and 27 are divided, to the state in which the main body 21 is closed, in other words, the half-divided bodies 26 and 27 are combined and integrated. The halves 26 and 27 are joined firmly by fitting the concave portion 26a into the convex portion 27b and the concave portion 27a into the convex portion 26b.

Next, as shown in FIG. 4B, the fixing portion 7 of the hanger 4 is inserted from the upper end of the bolt 3. As described above, the insertion hole 7a of the hanger 4 has a larger diameter than the coupling surface 23 of the opening/closing sleeve 20 and a smaller diameter than the large diameter portion 25. Therefore, the fixed portion 7 of the hanger 4 quickly reaches the front of the large diameter portion 25 of the opening/closing sleeve 20 by being dropped due to its own weight, and is locked to the coupling surface 23.

Further, the insertion hole 7 a of the hanger 4 is positioned on the coupling surface 23. As a result, even if the concave portion 26a is not yet fitted to the convex portion 27b and the concave portion 27a is not yet fitted to the convex portion 26b, separation of the half-split bodies 26, 27 installed in the bolt 3 is It is preferably prevented by the hanger 4.

Next, as shown in FIG. 4C, the nut 10 is inserted from the upper end of the bolt 3. As described above, since the fixed inner peripheral surface 11 of the nut 10 has a diameter larger than that of the bolt 3, the nut 10 quickly reaches the front of the coupling surface 23 of the opening/closing sleeve 20 by falling due to its own weight. Then, with the main body 21 closed, the second female screw portion 12 of the nut 10 is screwed into the second male screw portion 24 of the coupling surface 23 of the opening/closing sleeve 20.

The screwing distance at this time is the length of the coupling surface 23 in the axial direction Y, which is extremely shorter than the length of the long bolt 3, so that the screwing operation is completed in a short time. As a result, the hanger 4 is sandwiched between the nut 10 and the large diameter portion 25 of the opening/closing sleeve 20, and the installation of the bolt support unit 1 is completed.

As described above, in the bolt support unit 1 of the present embodiment, the first female threaded portion 22 of the opening/closing sleeve 20 is engaged with the first male threaded portion 3a of the bolt 3 in the cross direction X, and the opening/closing sleeve 20 is pushed by one touch. Can be installed in. That is, the first female screw portion 22 of the opening/closing sleeve 20 does not have to be screwed in the screwing direction Y while being repeatedly rotated with respect to the first male screw portion 3a of the long bolt 3. Therefore, the workability of the construction for installing the bolt support unit 1 is improved. Specifically, the work can be greatly simplified and the work time can be greatly shortened.

Further, the stopper 5 fixes the first female screw portion 22 of the opening/closing sleeve 20 by engaging the first male screw portion 3 a of the bolt 3 with the fixing member which is the nut 10. As a result, the position of the hanger 4 with respect to the bolt 3, the protruding height and the centering of the bolt 3 from the hanger 4 are less likely to vary, and the installation accuracy of the bolt support unit 1 can be improved. Further, the hanger 4 can be firmly fixed to the bolt 3 as compared with the case where the engaging portion such as a clip provided on the stopper is simply engaged with the bolt 3, and the load bearing capacity of the bolt support unit 1 is increased. Can be planned.

The fixing portion 7 of the hanger 4 is sandwiched between the opening/closing sleeve 20 and the nut 10 with the bolt 3 inserted in the insertion hole 7a. Thereby, the hanger 4 can be firmly fixed to the bolt 3 not only by the engaging force of the opening/closing sleeve 20 with the bolt 3 but also by the clamping force between the opening/closing sleeve 20 and the nut 10. Therefore, the withstand load of the bolt support unit 1 can be further increased.

Since the first female threaded portion 22 of the opening/closing sleeve 20 has the same thread pitch as the first male threaded portion 3a of the bolt 3, the first female threaded portion 22 of the opening/closing sleeve 20 is moved in the crossing direction X from the first male threaded portion of the bolt 3. The part 3a can be fitted and engaged without displacement. Therefore, the hanger 4 can be firmly fixed by the bolt 3, and the load bearing capacity of the bolt support unit 1 can be further increased.

FIG. 5 shows a side view of a bolt support unit 1 including a hanger 4 which is a modified example of FIG. In this side view, a part of the left side from the center line is shown in cross section. In this embodiment, the engaging portion 7b that is engaged with the first male screw portion 3a of the bolt 3 is formed at the opening edge of the insertion hole 7a of the fixing portion 7 of the hanger 4. The locking portion 7b is an annular inclined piece that is inclined and protrudes upward at the opening edge of the insertion hole 7a.

When the nut 10 is screwed on the coupling surface 23 of the opening/closing sleeve 20 and comes close to the large diameter portion 25, the locking portion 7b bites into the valley of the first male screw portion 3a of the bolt 3 and is locked, and the hanger 4 has a locking function. Is realized. Therefore, the hanger 4 is more firmly fixed to the bolt 3, and the withstand load of the bolt support unit 1 is further increased.

FIG. 6 shows (a) a top view and (b) an inner view of the opening/closing sleeve 20 as a modified example of FIG. 1 with the main body 21 opened. In this embodiment, the main body 21 of the opening/closing sleeve 20 has a connecting portion 21a that connects the respective half-split bodies 26 and 27 so as to be openable and closable in the circumferential direction. The connecting portion 21a is formed of, for example, a thin portion that connects the large diameter portions 25 of the half-split bodies 26 and 27.

By having the connecting portion 21a, as shown in FIG. 6A, the main body 21 can be opened and closed in the direction of the arrow in a state where the half-split bodies 26 and 27 are connected. This prevents the halves 26, 27 from being lost due to separation, and further improves workability in installing the bolt support unit 1.

<Second Embodiment>
FIG. 7 is a perspective view showing a state in which the bolt support unit 1 according to the second embodiment of the present invention fixes the bolt 3 to the support plate (support member) 30. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof may be omitted. In forming a reinforced concrete foundation in a building, a bolt support unit 1 supports a bolt 3 which is an anchor bolt to be embedded in the lower part of the foundation before placing concrete. The bolt 3 is positioned and held at an arbitrary position between the pair of molds 31 for forming a foundation before pouring concrete.

The bolt support unit 1 of the present embodiment includes a bolt 3, a stopper 5, and a support plate 30. The support plate 30 is bridged over a pair of molds 31 and fixed to the upper surface 31 a of the mold 31 with bolts 32 or the like. It is also possible to perform another double plate construction in which another support plate (not shown) is fixed to the upper surface 31a of the form 31 and the support plate 30 is fixed to the upper surface of this support plate.

The stopper 5 of the present embodiment includes a cap (fixing member) 40 and an opening/closing sleeve 50 similar to that of the first embodiment. The support plate 30 is clamped by the cap 40 arranged on the upper side of the support plate 30 and the opening/closing sleeve 50 arranged on the lower side of the support plate 30, and fixed to the bolt 3.

FIG. 8 shows (a) an assembly view of the bolt support unit 1 viewed from the side, (b) a top view of the cap 40, and (c) a bottom view of the opening/closing sleeve 50. It should be noted that, since the assembly drawing is bilaterally symmetric when viewed in the drawings, a part of the left side from the center line is shown in a cross section for the sake of description, and the assembly drawings shown below are also the same.

The bolt 3 has a first male screw portion 3a at least in the installation range of the support plate 30 in the axial direction. The opening/closing sleeve 50 has a main body 21 that can be opened and closed in the circumferential direction of the bolt 3, a first female screw portion 22 formed on the inner peripheral surface of the main body 21, and a coupling surface 23 formed on the outer peripheral surface of the main body 21. .. By closing the main body 21 from the open state, the first female threaded portion 22 can be engaged with the first male threaded portion 3a in the intersecting direction X that intersects the screwing direction Y with respect to the first male threaded portion 3a.

The cap 40 has a cylindrical shape with a bottom and is made of, for example, resin and has flexibility, and the cap 40 has a fixed inner circumferential surface 11 having an inner diameter di larger than the diameter Db of the bolt 3. Have. By coupling the fixed inner peripheral surface 11 to the coupling surface 23 in the state where the main body 21 is closed, the first female screw portion 22 is engaged with the first male screw portion 3 a and the opening/closing sleeve 50 is fixed to the bolt 3.

The support plate 30 has an insertion hole 30a through which the bolt 3 is inserted, and the bolt 3 is fixed to the support plate 30 by being sandwiched between the opening/closing sleeve 50 and the cap 40 while being inserted into the insertion hole 30a. Further, the opening/closing sleeve 50 has the second male screw portion 24 on the coupling surface 23, and the cap 40 has the second female screw portion 12 on the fixed inner peripheral surface 11.

Then, with the main body 21 closed, the cap 40 can be inserted from the upper end (tip) of the bolt 3, and the second female screw portion 12 of the cap 40 can be screwed into the second male screw portion 24 of the opening/closing sleeve 20. Further, the main body 21 is formed with a large-diameter portion 25 having a diameter larger than that of the joining surface 23 continuously from the joining surface 23. The large diameter portion 25 has a cylindrical shape. The first female screw portion 22 is formed in a region other than the large diameter portion 25 of the inner peripheral surface of the main body 21, and the coupling surface 23 is a region other than the large diameter portion 25 of the outer peripheral surface of the main body 21 and has a large diameter. It is formed in a region near the portion 25.

The hole diameter dh of the insertion hole 30a is larger than the diameter Db of the bolt 3 and the maximum outer diameter Dc of the coupling surface 23, but smaller than the outer diameter De of the large diameter portion 25. The screw pitch of the first female screw portion 22 is formed to be the same as that of the first male screw portion 3 a of the bolt 3. The main body 21 is composed of a pair of half-split bodies 26 and 27 divided in the circumferential direction of the bolt 3.

A concave portion (fitting portion) 26a and a convex portion (fitting portion) 26b are formed on both end surfaces in the circumferential direction of the half-split body 26, respectively. A concave portion (fitting portion) 27a and a convex portion (fitting portion) 27b are formed on both end surfaces in the circumferential direction of the half-split body 27, respectively. The recess 26a can be fitted to the protrusion 27b, and the recess 27a can be fitted to the protrusion 26b in a state in which both circumferential end surfaces of the half halves 26, 27 are opposed to each other.

Hereinafter, a construction procedure for installing the bolt support unit 1 will be described with reference to FIGS. First, as shown in FIG. 8A, at the fixing position of the opening/closing sleeve 50 on the bolt 3, the bolt 3 is sandwiched by the half-split bodies 26 and 27 from the crossing direction X. That is, from the state where the main body 21 is opened, in other words, the half-divided bodies 26 and 27 are divided, to the state where the main body 21 is closed, in other words, the half-divided bodies 26 and 27 are combined and integrated.

The halves 26 and 27 are joined firmly by fitting the concave portion 26a into the convex portion 27b and the concave portion 27a into the convex portion 26b. Further, in FIG. 8A, by presetting the fixing position of the opening/closing sleeve 50 with respect to the bolt 3, the protruding length of the bolt 3 protruding above the support plate 30 is defined.

That is, before fixing the bolt 3 to the support plate 30 by the stopper 5 in the construction of FIGS. 8B and 8C described later, the height of protrusion of the bolt 3 from the support plate 30 must be adjusted in advance. Is possible. Therefore, the burden on the operator is reduced, the protrusion height and the centering of the bolt 3 from the support plate 30 are less likely to vary, and the stopper 5 and the installation accuracy of the bolt 3 are improved.

Next, as shown in FIG. 8B, the insertion hole 30a of the support plate 30 is inserted from the upper end of the bolt 3 to which the opening/closing sleeve 50 is attached. When the insertion hole 30a is positioned on the coupling surface 23, even if the concave portion 26a is not yet fitted to the convex portion 27b and the concave portion 27a is not yet fitted to the convex portion 26b, the half of the bolt 3 installed The separation of the split bodies 26, 27 is preferably prevented by the support plate 30.

Next, as shown in FIG. 8C, the cap 40 is inserted from the upper end of the bolt 3. As described above, since the fixed inner peripheral surface 11 of the cap 40 has a larger diameter than the bolt 3, the cap 40 quickly reaches the front of the coupling surface 23 of the opening/closing sleeve 50 by being dropped due to its own weight. Then, with the main body 21 closed, the second female screw portion 12 of the cap 40 is screwed onto the second male screw portion 24 of the coupling surface 23 of the opening/closing sleeve 50.

The mounting work of the opening/closing sleeve 50 and the cap 40 is completed in a shorter time than when the anchor bolt is installed by the double nut, and the support plate 30 is sandwiched between the cap 40 and the large diameter portion 25 of the opening/closing sleeve 50. The installation of the bolt support unit 1 is completed.

As described above, in the bolt support unit 1 of the present embodiment, the first female screw portion 22 of the opening/closing sleeve 50 is engaged with the first male screw portion 3a of the bolt 3 from the crossing direction X, and the opening/closing sleeve 50 is pushed with one touch. Can be installed in That is, the double nut may not be screwed in the screwing direction Y while being repeatedly rotated with respect to the first male screw portion 3a of the bolt 3. Therefore, the workability of the construction for installing the bolt support unit 1 is improved. Specifically, the work can be greatly simplified and the work time can be greatly shortened.

In addition, the stopper 5 fixes the first female screw portion 22 of the opening/closing sleeve 50 by engaging the first male screw portion 3 a of the bolt 3 with the fixing member that is the cap 40. Thereby, while adjusting the height of the bolt 3 by screwing the double nut, the height of the anchor bolt is adjusted unlike the case where the support plate 30 is fastened by sandwiching the support plate 30 with the double nut and fixing the bolt 3 to the support plate 30. Can be done in advance. Therefore, the burden on the operator is reduced, the protrusion height and the centering of the bolt 3 from the support plate 30 are less likely to vary, and the installation accuracy of the bolt 3 is improved.

The support plate 30 is sandwiched between the opening/closing sleeve 50 and the cap 40 with the bolt 3 inserted in the insertion hole 4a. Accordingly, not only the engaging force of the opening/closing sleeve 50 with respect to the bolt 3 but also the clamping force between the opening/closing sleeve 50 and the cap 40 allows the bolt 3 to be more firmly fixed to the support plate 30. Therefore, it is possible to prevent the bolt 3 from tilting with respect to the support plate 30 due to the concrete flowing in during concrete pouring, the vertical standing of the bolt 3 can be maintained, and the installation accuracy of the bolt 3 is further improved.

Further, since the first female threaded portion 22 of the opening/closing sleeve 50 has the same pitch as the first male threaded portion 3a of the bolt 3, the first female threaded portion 22 of the opening/closing sleeve 50 is moved from the crossing direction X to the first male threaded portion of the bolt 3. 3a can be matched and engaged without displacement. Therefore, the bolt 3 can be more firmly fixed to the support plate 30. Therefore, tilting of the bolt 3 with respect to the support plate 30 at the time of pouring concrete can be more effectively prevented, the vertical standing of the bolt 3 can be effectively maintained, and the installation accuracy of the bolt 3 can be improved. Further improve.

Further, by covering the upper ends of the bolts 3 with the cap 40, concrete does not adhere to the upper ends of the bolts 3 when pouring the concrete, and it is possible to effectively prevent the bolts 3 from becoming dirty or rusted.

Although the description of each embodiment of the present invention has been completed, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, the bolt support unit 1 described in each of the above-described embodiments has various applications other than the above-mentioned applications as long as the bolt 3 supports the object to be supported or the bolt 3 is supported by the object to be supported. Applicable.

Further, if the opening/closing sleeves 20 and 50 can be fixed to the bolts 3 by engaging the first female screw portions 22 of the opening/closing sleeves 20 and 50 with the first male screw portions 3a of the bolts 3, the nut 10 and the cap 40 can be fixed. Alternatively, another fixing member may be used. For example, a cylindrical cover may be used as the fixing member. Further, instead of the hanger 4 and the support plate 30, another support member may be used.

Further, the opening/closing sleeves 20 and 50 have the second male screw portion 24 on the coupling surface 23, and the cap 40 has the second female screw portion 12 on the fixed inner peripheral surface 11. However, the present invention is not limited to this, and the second male screw portion 24 may not be formed on the joint surface 23, and the joint surface 23 may be a flat surface or an inclined surface that tapers in the direction of increasing the diameter toward the large diameter portion 25. good.

In this case, as shown in FIG. 10, the fixing member may be a cylindrical cover 60 in which the fixed inner peripheral surface 11 is a flat surface, or, as shown in FIG. 11, the fixed inner peripheral surface 11 is flat. The cap 70 may be a cylindrical cap with a bottom. Further, the cap 70 may be provided with a slit 71 so that the opening/closing sleeves 20, 50 and the bolt 3 can be easily attached.

Further, a locking portion 7b similar to that in the case of the first embodiment may be provided at the opening edge of the insertion hole 30a of the support plate 30, and the main body 21 of the opening/closing sleeve 50 may be similar to that in the case of the first embodiment. You may provide the connection part 21a.

1 Bolt Support Unit 3 Bolt 3a First Male Thread Part 4 Hanger (Support Member)
5 Stopper 7a Insertion hole 7b Locking part 10 Nut (fixing member)
11 Fixed Inner Circumferential Surface 12 Second Female Threaded Part 20 Opening/Closing Sleeve 21 Main Body 21a Connection Part 22 First Female Threaded Part 23 Coupling Surface 24 Second Male Threaded Part 26 Half Divide 26a Recessed Part (fitting part)
26b Convex part (fitting part)
27 Half body 27a Recessed portion (fitting portion)
27b Convex part (fitting part)
30 Support plate (support member)
40 Cap (fixing member)
50 Opening/closing sleeve 60 Cover (fixing member)
70 Cap (fixing member)

Claims (8)

A bolt having a first male screw portion,
A stopper fixed to the bolt,
The stopper is
A main body that can be opened and closed in the circumferential direction of the bolt, a first female screw portion formed on the inner peripheral surface of the main body, and a coupling surface formed on the outer peripheral surface of the main body, and closing the main body from the open state. An opening/closing sleeve capable of engaging the first female threaded portion with the first male threaded portion from an intersecting direction that intersects the screwing direction with respect to the first male threaded portion,
It has a fixed inner peripheral surface having a diameter larger than that of the bolt, and connects the fixed inner peripheral surface to the connecting surface in a state where the main body is closed, thereby engaging the first female screw portion with the first male screw portion. A bolt support unit having a fixing member that fixes the opening/closing sleeve to the bolt. Further comprising a support member having an insertion hole through which the bolt is inserted,
The bolt support unit according to claim 1, wherein the stopper fixes the support member by sandwiching the support member between the opening/closing sleeve and the fixing member in a state where the bolt is inserted into the insertion hole. The bolt support unit according to claim 2, wherein the insertion hole has an engaging portion that is engaged with the first male screw portion at an opening edge thereof. The fixing member has a second female screw portion on the fixed inner peripheral surface,
The bolt support unit according to any one of claims 1 to 3, wherein the opening/closing sleeve has, on the coupling surface, a second male screw portion to which the second female screw portion can be screwed when the main body is closed. .. The bolt support unit according to any one of claims 1 to 4, wherein the first female threaded portion has the same thread pitch as the first male threaded portion. The bolt support unit according to any one of claims 1 to 5, wherein the main body includes a pair of half-divided bodies divided in the circumferential direction of the bolt. Each half is
End faces in the circumferential direction facing each other in the closed state of the main body,
The bolt support unit according to claim 6, further comprising: a fitting portion that fits the end surfaces to each other when the main body is closed. The said main body is a bolt support unit of Claim 6 or 7 which has a connection part which connects each said half-divided body so that the said circumferential direction can be opened and closed.

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