JP2008185076A - Bolt connecting nut and anchor construction method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bolt connecting nut used when connecting a coupling bolt such as a hanging bolt and a connecting bolt to an anchor bolt, and an anchor construction method in an electric construction, air conditioner construction, duct construction, and supply and drain water construction, with which the direction of the nut can be easily identified even at a dim site, even when the amount of a bolt screwed into the bolt connecting nut is different for each bolt or when a specification such as a screw diameter or a pitch is different for each bolt. <P>SOLUTION: In the bolt connecting nut 1, bolts are screwed into both ends of the substantially cylindrical nut having a female screw hole 11 thereinside for connection. Through-holes 12a and 12b are provided at one end and the other end of the nut 1, penetrating from each of ends to predetermined length positions in the axial direction and a right-angle direction of the nut 1, and the diameters of each of the through-holes 12a, 12b are made different from each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bolt connecting nut used when connecting a connecting bolt such as a suspension bolt or a connecting bolt to an anchor bolt in electrical work, air conditioning work, duct work, water supply / drainage work, etc., and an anchor construction method using the same. .

  Conventionally, when installing cables or steel pipes on the ceiling or wall surface of buildings or structures, for example, in electrical work, air conditioning work, duct work, water supply / drainage work, etc. It is common to attach and support the cable, steel pipe, etc. via a connecting bolt such as a bolt, and the anchor bolt and the connecting bolt are usually connected by a dedicated bolt connecting nut for connecting the bolts together. I am doing so.

  However, the bolt connecting nut as described above is usually formed in a cylindrical shape and is configured to screw the bolt from one end side and the other end side in the axial direction of the cylindrical nut. The screwed state cannot be seen from the outside. For this reason, in Patent Document 1 below, by screwing each bolt screwed into the nut by providing a through-hole penetrating in the direction perpendicular to the axial direction of the nut in the vicinity of both ends of the bolt connecting nut as described above. It has been proposed to make the state visible from the outside.

  However, since the thing of the said patent document 1 is the structure which provided the through-hole of the same diameter in the fixed length position from each end surface in the both ends of a cylindrical nut, the screw diameter of each said bolt, screw pitch, etc. This is convenient when there is no restriction on the screwing amount to the nut, but the screwing amount of the bolt to the nut is different for each bolt and the screwing amount is regulated by the through hole. When the standards such as the screw diameter and the screw pitch of the bolts are different, there is a problem that it is difficult to identify from the outside whether each bolt should be screwed in from which side.

  Therefore, in Patent Document 1, in order to eliminate the above-described problems, a label indicating the standard and size of the female screw hole for each bolt, the mounting direction to the anchor bolt, and the like is attached to the side surface of the nut. However, it is cumbersome and cumbersome to stick the labels as described above to the nuts one by one, which may increase the manufacturing cost. In addition, the display contents described on the labels as described above are difficult to see in a dimly lit site, and there are many cases where identification is difficult.

JP 2000-87926 A

  The present invention has been proposed in view of the above-described problems, and the screwing amount of the bolt with respect to the bolt connecting nut is varied for each bolt to regulate the screwing amount with the through hole, or the screw diameter of each bolt. Provided is a bolt connection nut and an anchor construction method using the same, which can be easily identified even in dimly lit sites, even if standards such as pitch and pitch are different, from which side of the nut should be screwed in. For the purpose.

  In order to achieve the above object, a bolt connecting nut and an anchor construction method using the same according to the present invention are configured as follows. That is, the bolt connection nut according to the present invention is a bolt connection nut in which a bolt is screwed into and connected to both ends of a substantially cylindrical nut having a female screw hole inward, and one end side and the other end side of the nut are connected to each other. In addition, a through-hole penetrating in a direction perpendicular to the axial direction of the nut is provided at a predetermined length from each end portion, and the diameter of each through-hole is made different. The length positions of the through holes from the end portions may be different from each other, and the diameters of the female screw holes for screwing the bolts into the both end portions of the nut may be different from each other.

  Further, the anchor construction method according to the present invention is the above bolt connection after the bolt type anchor is installed in the anchor insertion hole by screwing one end of the bolt connection nut into the anchor bolt of the clamp type anchor. The connecting bolt is screwed into the other end of the nut and connected, and the direction of the nut when the bolt connecting nut is screwed into the anchor bolt is identified by the arrangement state of the through holes having different diameters. It is characterized by.

  Further, it is preferable that the anchor bolt and the connecting bolt are screwed into the bolt connection nut in a visible state from the through hole, and the anchor bolt is screwed in the bolt connecting nut from the through hole. Thus, it may be possible to determine whether or not a minimum screw-in amount necessary for constructing the tightening anchor is secured. Further, the colors of the anchor bolt and the connecting bolt may be different from each other.

  According to the bolt connecting nut and the anchor construction method using the same according to the present invention, the direction of any one of the through holes having different diameters, for example, the direction having the small diameter through hole is determined as the screwing direction to the anchor bolt. If this is the case, the nut method can be known only by visually discriminating the sizes of the through-holes having different diameters or by groping in a dark spot. As a result, for example, when the screwing amount suitable for the anchor bolt is indicated at the position of the through hole, or when the diameter and screw standard of the bolt and female screw hole to be screwed into both ends of the nut are different, the connection is made properly without misuse. It becomes possible to do. Also, confirmation after connection is easy.

  Hereinafter, the nut for bolt connection and the anchor construction method using the same according to the present invention will be specifically described based on the embodiments shown in the drawings.

  FIG. 1 shows an embodiment of a bolt connecting nut according to the present invention. A bolt connecting nut 1 of this embodiment is formed in a cylindrical shape having an outer peripheral surface having a hexagonal shape, like a normal hexagon nut, A female screw hole 11 is formed inside the cylindrical nut 1, and in the case shown in the figure, the female screw holes 11 having the same diameter and the same pitch are provided continuously over substantially the entire length of the inner peripheral surface of the cylindrical nut 1. It is a thing.

  In the present invention, through-holes 12a and 12b penetrating in a direction perpendicular to the axial direction of the nut 1 are provided on one end side and the other end side of the nut 1 at predetermined length positions from the respective end portions. The diameters of the through holes 12a and 12b are different from each other. In the present embodiment, through holes 12a and 12b are provided at different positions from both ends of the nut 1, and in the case of the figure, the axial length of the nut 1 from the end 1a on one end side of the nut 1 is reduced. The through hole 12a is provided at a length of about 1/4, and the through hole 12b is provided at a length of about 1/2 of the axial length of the nut 1 from the end 1b on the other end side of the nut 1. Each is provided. In the present embodiment, the diameter of the through hole 12b is larger than the diameter of the through hole 12a. In the case of the figure, the diameter of the through hole 12b is about 1.5 times the diameter of the through hole 12a. ing.

  FIG. 2 shows an example of an anchor construction structure in which an anchor is constructed using the above-described bolt connection nut 1. In particular, in the case of the figure, the bolt connection nut 1 is used as a tightening nut for the tightening anchor 2. While being used, the connecting bolt 3 is connected to the anchor bolt 21 of the clamped anchor 2 via the bolt connecting nut 1. Cables, steel pipes, and other various articles are attached to the opposite side of the connecting bolt 3 from the anchor bolt 21 but are not shown in the figure. In the figure, h is an anchor insertion hole formed in the wall surface W or the like on which the anchor is to be constructed, and 4 is a washer interposed between the wall surface W and the bolt connecting nut 1 as required.

  As shown in FIG. 3, the tightening anchor 2 includes an anchor bolt 21 having a male screw 21a on one end side, and a substantially cylindrical expansion provided on an end 21b of the anchor bolt 21 opposite to the male screw 21a. And an open sleeve 22. The expansion sleeve 22 is fitted and held in a narrow diameter portion 21c formed in the end portion 21b, and the one end 22a side of the expansion sleeve 22 is expanded by a taper portion 21t provided on one end side of the small diameter portion 21c. The sleeve 22 is opened, and a slit 22 s is provided on one end 22 a side of the sleeve 22.

  When the bolt-connecting nut 1 is screwed into the male screw 21b of the anchor bolt 21 in a state where the tightening anchor 2 is inserted into the anchor insertion hole h, the anchor 22 is in contact with the inner surface of the hole h. Only the bolt main body 21 is pulled toward the nut 1, whereby the tapered portion 21 t enters the expanding sleeve 22, and the one end 22 a side of the sleeve 22 is expanded, and the tip portion is the inner surface of the anchor insertion hole h. In this configuration, the anchor bolt 21 is caught and locked.

  Next, an example of a procedure for constructing the anchor construction structure as described above will be described with reference to FIGS. 4 and 5. First, as shown in FIG. 4 (a), an anchor insertion hole h is formed by a drill D or the like in a building, a structure or other wall surface W or the like on which an anchor is to be constructed. Next, air is blown or sucked into the insertion hole h via an air supply hose H or the like as shown in FIG. 4B to remove the cutting powder f remaining in the insertion hole h. Then, the anchor 2 is inserted into the anchor insertion hole h as shown in FIG. 4C, and the expanding sleeve 22 is brought into close contact with the inner surface of the insertion hole h. After the washer 4 is fitted, the bolt connecting nut 1 is screwed.

  Next, the socket T1 of a manual tool T such as a wrench is engaged with the end of the bolt connecting nut 1 screwed into the anchor bolt 21 on the opposite side to the anchor bolt 21 as shown in FIG. The nut 1 is rotated in a predetermined screwing direction. Then, the expansion sleeve 22 of the anchor 2 is in a state of almost stopping at the position when inserted into the anchor insertion hole h with little frictional movement with the anchor insertion hole h in the circumferential direction and the axial direction. On the other hand, the anchor bolt 21 hardly moves in the circumferential direction due to the frictional force with the anchor insertion hole h or the expansion sleeve 22 and gradually moves in the direction of the nut 1 by the rotation of the bolt connecting nut 1. Then, it is drawn into the nut 1 as shown in FIG.

  Accordingly, the tapered portion 21t provided on one end side of the narrow diameter portion 21a of the anchor bolt 21 gradually enters the expanding sleeve 22, and one end 22a of the expanding sleeve 22 is shown in FIG. The tip end part bites into the inner surface of the anchor insertion hole h, and the anchor bolt 21 is retained and locked. Then, when the anchor bolt 21 is securely retained and locked, the manual tool T is removed from the nut 1.

  In this embodiment, the anchor bolt 21 is screwed into the bolt connecting nut 1 so that the screwed state can be seen from the through hole 12a, and thereby the tightening anchor 2 is constructed. It is also possible to determine whether or not the minimum screwing amount necessary for the above is ensured. In particular, in the case shown in the drawing, the washer 4 is fitted to the anchor bolt 21 of the tightening anchor 2 and the bolt connecting nut 1 is screwed to secure the minimum screwing amount necessary for constructing the tightening anchor 2. When the expansion sleeve 22 is expanded beyond a predetermined reference value, the tip screw portion 21a of the anchor bolt 21 appears over the entire opening of the through hole 12a. It can be seen that a limited screw-in amount is secured and the expansion sleeve 22 has expanded beyond a predetermined reference value. If necessary, the nut 1 is further screwed in and the expansion sleeve 22 is opened, so that the inner surface of the anchor insertion hole h can be prevented from coming off with an appropriate strength.

  When the bolt-connecting nut 1 is screwed into the anchor bolt 21 of the clamp-type anchor 2 as described above and the clamp-type anchor 2 is secured to a predetermined position in the anchor insertion hole h, the bolt-connect A connecting bolt 3 is screwed into the other end of the nut 1 as shown in FIG. 5C, and the connecting bolt 3 is connected to the connecting bolt from at least the other through-hole 12b formed in the nut 1. It is only necessary to screw in until the tip of 3 can be seen, so that the screwed state of the connecting bolt 3 can be easily confirmed.

  In the above embodiment, the connecting bolt 3 is simply connected to the anchor bolt 21 of the tightening anchor 2 via the washer 4 and the bolt connecting nut 1, but for example, as shown in FIG. And as shown in (b), various panels, strips, etc. between the wall surface W etc. which constructed the anchor 2 and the washer 4 or between the wall surface W etc. and the bolt connection nut 1 with the washer 4 omitted. It is also possible to perform construction with the plate-like object P in between. Further, both of the two through holes 12a and 12b, for example, the large-diameter through hole 12b, the tip portions of both the bolts 21 and 4 are positioned, and the both through holes 12b. It is also possible to identify the screwed state of the bolts 2.

  Moreover, although the said embodiment formed the internal thread hole 11 formed in the inner side of the nut 1 for bolt connection at the same diameter and the same pitch over the full length of the said internal peripheral surface, When bolts having different standards are connected, female screw holes 11a and 11b having different diameters, pitches, or standards can be formed at both ends of the inner hole of the nut 1 as shown in FIG.

  Further, when the bolt connection nut 1 is screwed into the anchor bolt 21 of the tightening anchor 2 as described above, conventionally, a tightening torque of the nut 1 is generally made constant using a manual tool such as a wrench, particularly a torque wrench. Thus, the screwing amount of the nut 1 with respect to the anchor bolt 21 is managed, but in the present invention, the through hole 12a (12b) as described above is provided so that the through hole 12a enters the nut 1. The amount of screwing of the nut 1 into the anchor bolt 21 and the construction state of the tightening anchor 2 can be known only by looking at the state of the anchor bolt 21 entering.

  Therefore, as a means for rotating the nut 1, it is not always necessary to use a torque wrench as described above. For example, a manual tool such as a normal wrench or a spanner or various electric tools can be used. is there. In the case of using an electric power tool, for example, as shown in FIG. 8, if the shank S of the electric power tool (not shown) is engaged with the bolt connecting nut 1 via the adapter A as shown in the figure, it is rotated. Good.

  Moreover, although the said embodiment demonstrated as an example the case where it constructs on the wall surface W etc. of a building or a structure, for example, the anchor insertion hole h of the up-down direction is formed in the ceiling surface of a building or a structure, This is also applied to the case where a fastening anchor 2 similar to the above is constructed and a connecting bolt 3 such as a suspension bolt is connected to the anchor bolt 21 of the anchor 2 via a bolt connecting nut 1 similar to the above. it can. Furthermore, the present invention is not limited to the above-described tightening type anchors, and can also be applied when connecting anchor bolts and connecting bolts of other various anchors, and other various bolts. You may have a male screw only in the edge part to connect.

  Furthermore, if the color of the bolt connected to both ends of the bolt connecting nut 1 is changed, visual construction management can be further facilitated. For example, by forming the anchor bolt 21 of the tightening anchor 2 in silver (silver) with unichrome (glossy chromate) or the like, and forming the connecting bolt 3 in gold (gold) with chromate (colored chromate) or the like, If the male screw of the silver of the anchor bolt 21 and the golden male screw of the connecting bolt appear from the two through holes 12a and 12b, respectively, the screwed state of the anchor bolt 21 and the connecting bolt 3 should be clearly and easily and quickly confirmed. Is possible.

  In addition, the above two types of electrogalvanized plating of UNIQLO and Chromate have almost the same corrosion resistance, and the characteristics of plating are the same only by the difference in the color pigments. On the other hand, there is no concern about a phenomenon in which one side has a negative potential to generate a very small amount of current and corrosion occurs due to the electrolytic action of the current.

  According to the bolt connecting nut and the anchor construction method using the same according to the present invention configured as described above, one of the through holes 12a and 12b having different diameters, for example, the small diameter through hole side is connected to one bolt. For example, if it is determined for an anchor bolt, the method of the nut can be known only by visually discriminating the sizes of the through holes having different diameters or by groping in a dim place. As a result, even when the types, standards, shapes, or screwing amounts of bolts connected to both ends of the nut are different, the nut and each bolt should be well connected with a predetermined connection direction and an appropriate screwing amount. Therefore, the present invention can be applied effectively not only to various anchor bolts but also to bolt connecting nuts for connecting various bolts, anchor bolt construction methods using the nuts, and the like.

(A) is a top view which shows one Embodiment of the nut for bolt connection by this invention, (b) is the side view, (c) is cc sectional drawing in (a), (d) is in (c) dd sectional drawing, (e) is ee sectional drawing in (c). The front view of the state which constructed the anchor using the said nut for bolt connection. The exploded front view of a figure. (A)-(d) is explanatory drawing of the front | former stage which shows an example of the construction process of an anchor. (A)-(d) is latter explanatory drawing which shows an example of the construction process of an anchor. (A) And (b) is explanatory drawing which shows the other example of the construction process of an anchor. Sectional drawing which shows other embodiment of the nut for bolt connection by this invention. Explanatory drawing in the case of nut tightening with an electric tool.

Explanation of symbols

1 Nut for bolt connection 11, 11a, 11b Female thread hole 12a, 12b Through hole
2 Clamping Anchor 21 Anchor Bolt 21a Male Thread 21b Small Diameter 22 Expanding Sleeve 22a End 22s Slit 3 Connection Bolt 4 Washer W Worked Section h Anchor Insertion Hole

Claims (6)

  A bolt connecting nut that is screwed into and connected to both ends of a substantially cylindrical nut having a female screw hole on the inside thereof, and is positioned at a predetermined length from each end of the nut on one end side and the other end side. A nut for connecting a bolt, wherein a through-hole penetrating in a direction perpendicular to the axial direction of the nut is provided in the nut, and the diameter of each through-hole is made different.   The bolt connecting nut according to claim 1, wherein the length positions of the through holes from the end portions are different from each other.   The nut for bolt connection according to claim 1 or 2, wherein the diameters of the female screw holes for screwing the bolts into both ends of the nut are different from each other.   The bolt connection nut is installed in the anchor insertion hole by screwing one end of the bolt connection nut according to any one of claims 1 to 3 into an anchor bolt of the clamp anchor. A connecting bolt is screwed into the other end of the bolt and connected to the anchor bolt, and the direction of the nut when the bolt connecting nut is screwed into the anchor bolt is identified by the arrangement of the through holes having different diameters. Characteristic anchor construction method.   By visually observing the screwed state of the anchor bolt with respect to the bolt connecting nut from the through hole, it can be determined whether or not the minimum screwing amount necessary for constructing the tightening anchor is secured. The anchor construction method according to claim 4, which is configured as follows.   The anchor construction method according to claim 4 or 5, wherein the anchor bolt and the connecting bolt have different colors.

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