JP3205880U - Movable nut - Google Patents

Abstract

Provided is a movable nut that can be easily fastened even with the last fastening bolt when a heavy object is fixed to a gantry with a plurality of fastening bolts, thereby improving workability. A female screw hole 11b into which a male screw shaft portion 4a of a fastening bolt 4 is screwed is formed, and a nut body 11 provided with a corner portion on the outside is attached to a mount 3 by welding. A through hole 12a1 having a diameter larger than the diameter of the female screw hole 11b of the nut body 11 is formed, and the nut body 11 is movable and accommodated at least in the horizontal direction, and when the nut body 11 is rotated, A nut body housing frame 12 that prevents the corner portion from hitting the inner surface and preventing rotation with the fastening bolt 4 is provided. [Selection] Figure 8

Description

  The present invention relates to a movable nut used when a heavy load such as a power receiving facility such as a cubicle, a power distribution facility, an electrical facility, a communication facility, or an electric device is fixed to a gantry with a plurality of fastening bolts.

  When fixing heavy loads such as power receiving equipment such as cubicles, power distribution equipment, electrical equipment, communication equipment, electrical equipment, etc. to the floor of concrete, etc., usually concrete, asphalt, etc. via a gantry with a certain height It is necessary to fix firmly to the floor.

  Therefore, for example, Patent Document 1 discloses a channel base as a gantry for installing a heavy object such as a self-supporting switchboard on the floor surface.

  The channel base as a pedestal has an installation part on the floor and a distribution equipment panel main body inside a skirt formed of a steel plate material of a predetermined thickness so as to substantially follow the lower peripheral edge of the distribution equipment panel main body. A mounting member having a mounting part is provided, and a square nut is welded to the mounting part of the mounting member, improving workability and torque when attaching the channel base to the power distribution equipment panel body The strength can be further increased (see, for example, [0014] to [0019] of Patent Document 1 and FIG. 3).

JP 2001-128318 A

  However, in the background art described in Patent Document 1, since a nut is pre-welded to a channel base as a pedestal, when a heavy object such as a self-supporting switchboard is fixed to the pedestal with a large number of bolts and nuts, If the bolts are inserted and tightened in sequence, the bolts on the heavy-weight side will have errors in drilling (dimensions error) and the mounting error during nut welding on the gantry side. There is a problem that the bolt hole on the heavy object side and the position of the nut of the gantry do not match and the bolt may not be fastened.

  Therefore, the present invention has been made paying attention to such a problem, and when fixing a heavy object to a gantry with a plurality of fastening bolts, the last fastening bolt can be easily fastened. An object of the present invention is to provide a movable nut capable of improving the performance.

In order to solve the above-mentioned problems, a movable nut according to the present invention includes a nut body in which a female screw hole into which a male screw shaft portion of a fastening bolt is screwed is formed and a corner portion is provided on the outside, and a pedestal And a through hole having a diameter larger than the diameter of the female screw hole of the nut body is formed, the nut body is movably accommodated at least in the horizontal direction, and the nut body is accommodated. A first feature is that it includes a nut body housing frame that prevents rotation with the fastening bolt when a corner portion of the nut is rotated.
Further, in the movable nut according to the present invention, the nut body has a quadrangular shape in plan view, the nut body housing portion includes a bottom plate portion in which a through hole for the fastening bolt is formed, and three sides of the bottom plate portion 3 side plate portions that are bent in the same direction and welded to the frame, and the bottom plate portion is the remaining one side of the three sides provided with the three side plate portions. Is a pin hole into which a drop-off prevention pin for preventing the nut body housed in the nut body housing portion from dropping is inserted into the projecting portion. The second feature is that is formed.

In the movable nut of the present invention, a female screw hole into which a male screw shaft portion of a fastening bolt is screwed is formed, and a nut body provided with a corner portion on the outside is welded and attached to a frame. A through hole with a diameter larger than the diameter of the female screw hole of the body is formed, the nut body is movable and accommodated at least in the horizontal direction, and when the nut body is rotated, the corner portion hits the inner side surface and is fastened A nut body housing frame for preventing rotation with the bolt.
Therefore, if the nut body housing frame of the movable nut according to the present invention is welded in advance to the through hole of the gantry, the nut body moves to the front, rear, left and right following the tip of the fastening bolt within the nut body housing frame, In addition, since it does not rotate with the fastening bolt, even if there is a drilling error (dimension error) in the bolt hole on the heavy load side or an installation error when welding the nut body housing frame to the mount, these errors are reduced. Can be absorbed.
As a result, even when the last fastening bolt is fastened when fixing heavy loads such as power receiving equipment such as cubicles, power distribution equipment, electrical equipment, communication equipment, electrical equipment, etc. to the gantry with multiple fastening bolts Since the nut body that is freely movable within the nut body housing frame can absorb the error and can be easily fastened, workability can be improved.

It is a front view which shows the usage example of the movable nut of embodiment which concerns on this invention. (A), (b) is an expanded sectional view of A part and B part in Drawing 1, respectively. (A)-(c) respectively is the top view of the welding fixed frame which comprises the movable nut of embodiment which concerns on this invention, a front view, and a left view. (A), (b) is the top view and front view of a nut body which respectively comprise the movable nut of embodiment which concerns on this invention. (A)-(c) respectively is the top view of the securing part which comprises the fall-off prevention pin of the movable nut of embodiment which concerns on this invention, a front view, and the front view of a pin part. (A), (b) is sectional drawing which shows the procedure at the time of attaching a nut body with respect to the fixing frame for welding of embodiment welded to the mount frame, respectively. (A), (b) is sectional drawing which shows the procedure until it fastens so that a nut body may be attached by attaching a fall prevention pin, after attaching a nut body to the welding fixing frame of embodiment welded to the mount frame, respectively. . (A), (b) It is sectional drawing which shows the state after passing through a connecting bolt, aligning the bolt hole of a heavy article with the movable nut of embodiment which was welded to the mount frame, respectively. (A)-(c) is a top view which shows the relationship between the bolt hole provided in the fixed frame for welding which comprises the movable nut of embodiment which concerns on this invention, and the nut hole of a nut body, respectively. It is sectional drawing which shows the state which match | combined the bolt hole of the heavy article with the movable nut of embodiment welded to the mount frame, and was completely screwed through the connection bolt. (A)-(c) is a top view which shows the state which the nut body accommodated in the fixed frame for welding which comprises the movable nut of embodiment which concerns on this invention, respectively does not circulate with a connection bolt.

  Hereinafter, embodiments of the movable nut according to the present invention will be described in detail with reference to the accompanying drawings. The embodiment described below is merely an example of the present invention including its dimensions and the like, and the present invention is not limited to the following embodiment, and can be appropriately changed within the scope of the technical idea of the present invention. is there.

<Configuration of Movable Nut 1 of Embodiment>
The movable nut 1 according to the embodiment has a certain height when a heavy load 2 such as a power receiving facility such as a cubicle, a power distribution facility, an electrical facility, a communication facility, or an electric device is fixed to a floor G such as concrete. 3 is firmly fixed to the floor G such as concrete or asphalt.

  The movable nut 1 according to the embodiment includes a nut body 11, a nut body housing frame 12, and a drop-off prevention pin 13, as shown in FIGS.

  As shown in FIG. 3 and the like, the nut body 11 is a square quadrangle having a side length L1 and a diagonal length L2 in plan view, and has four corner portions 11a. In the center, a female screw hole 11b into which the male screw shaft portion of the fastening bolt is screwed is formed. The diameter of the female screw hole 11b is R1.

  The nut body accommodating frame 12 is welded to the gantry 3 and accommodates the nut body 11 so as to be movable at least in the horizontal direction. When the nut body 11 is rotated, the corner portion 11a hits the inner side surface and rotates around the bolt. 3 side plate portions 12b, 12c, and 12d that are bent in the same direction from three sides of the bottom plate portion 12a and the bottom plate portion 12a in which the through holes 12a1 are formed, and whose tip portions are welded to the mount 3. And have. The side plate portions 12b, 12c, and 12d can be freely moved so that the nut body 11 is accommodated in the gap between the gantry 3 and the bottom plate portion 12a of the nut body housing frame 12 welded to the back side of the gantry 3. Thus, at least the thickness of the nut body 11 is set.

  The bottom plate portion 12a is a protruding portion 12a2 that protrudes beyond the side plate portions 12b, 12c, and 12d on both sides by extending the remaining one side of the three sides provided with the three side plate portions 12b, 12c, and 12d without being bent. In the protruding portion 12a2, a pin hole 12a3 into which a drop prevention pin 13 for preventing the nut body 11 housed in the nut body housing portion 12 from being dropped is formed.

  The nut body housing frame 12 is formed with a through hole 12a1 having a diameter R2 that is larger than the diameter R1 of the female screw hole 11b of the nut body 11 and substantially the same as the inner diameter of the through hole 3a1 provided in the top plate 3a of the mount 3. In addition, the nut body 11 is accommodated so as to be movable at least in the horizontal direction, and when the nut body 11 is rotated, the corner portion 11a hits the inner surface to prevent the rotation with the bolt. That is, the distance L3 between the inner side surfaces of the side plate portion 12b and the side plate portion 12d of the nut body housing frame 12 is larger than the length L1 of one side diagonal line of the square nut body 11 and the length of the diagonal line of the nut body 11 It is formed smaller than the length L2.

  As shown in FIGS. 5A to 5C, the drop-off prevention pin 13 includes a drop-off prevention pin body 13a and a drop-off prevention engagement body 13b, and the shaft portion 13a1 of the drop-off prevention pin body 13a is dropped off. When inserted and inserted through the insertion hole 13b1 of the prevention engagement body 13b, the four engagement portions 13b2 of the drop-off prevention engagement body 13b are configured to spread by the tip of the shaft portion 13a1.

<Installation of Movable Nut 1 and Fixing Method of Heavy Object by Movable Nut 1>

  Next, the installation of the movable nut 1 of the embodiment and a method for fixing a heavy object using the movable nut 1 will be described.

  First, as shown in FIG. 6A, a through hole 3a1 provided in the top plate 3a of the gantry 3 and a through plate formed in the bottom plate portion 12a of the nut body housing frame 12 constituting the movable nut 1 of the embodiment. The upper end portions of the side plate portions 12b, 12c and 12d of the nut body housing frame 12 constituting the movable nut 1 of the embodiment are welded and attached to the back side of the top plate 3a of the gantry 3 while aligning the positions of the holes 12a1. 6-8, the code | symbol 6 is a welding part.

  Next, as shown in FIG. 6 (b), the nut body is formed in the gap between the back side of the top plate 3 a of the gantry 3 and the bottom plate portion 12 a of the nut body housing frame 12 welded to the back side of the top plate 3 a of the gantry 3. 11, and then, as shown in FIG. 7 (a), the drop prevention engagement body 13 b and the fall prevention pin body 13 a are inserted into the pin hole 12 a 3 of the protruding portion 12 a 2 of the bottom plate portion 12 a in this order, and the fall prevention pin is inserted. 13 is fitted so that the nut body 11 does not fall off from the gap between the back side of the top plate 3a of the gantry 3 and the bottom plate portion 12a of the nut body housing frame 12 as shown in FIG.

  Next, as shown in FIG. 8A, the top of the gantry 3 is aligned with the bolt holes 2 a 1 such as the flange portion 2 a below the heavy object 2 and the positions of the through holes 3 a 1 provided in the top plate 3 a of the gantry 3. The heavy load 2 is placed on the plate 3a, and the fastening bolt 4 is inserted into the bolt hole 2a1 such as the flange portion 2a below the heavy load 2 via the washer 5a and the spring washer 5b, for example.

  Then, even if the female screw hole 11b of the nut body 11 and the tip of the male screw shaft portion 4a of the fastening bolt 4 are misaligned as shown in FIG. As shown in c), etc., the nut body accommodating frame 12 is accommodated so as to be freely movable within a range surrounded by the side plate portions 12b, 12c, 12d of the nut body accommodating frame 12 and the drop-off preventing pin 13. Therefore, as shown in FIG. 8B, the fastening bolt 4 is connected to the nut body via the bolt hole 2a1 such as the flange portion 2a below the heavy load 2 and the through hole 3a1 of the top plate 3a of the mount 3. 11 can be inserted into the female screw hole 11b and screwed together, and finally fastened as shown in FIG.

  Further, even if the tip of the male screw shaft portion 4a of the fastening bolt 4 is screwed into the female screw hole 11b of the nut body 11 and rotated, the distance between the side plate portion 12b of the nut body housing frame 12 and the inner side surface of the side plate portion 12d. Since L3 is configured to be larger than the length L1 of one side diagonal line of the square nut body 11 and smaller than the length L2 of the diagonal line of the nut body 11, it is shown in FIGS. 11 (a) to 11 (c). In this manner, the corner 11a of the nut body 11 can be brought into contact with the inner surface of the side plate portions 12b to 12d of the nut body housing frame 12 to prevent rotation with the fastening bolt 4.

  Therefore, according to the movable nut 1 of the embodiment, the nut body 11 moves back and forth and right and left following the tip of the fastening bolt 4 in the nut body housing frame 12 welded in advance to the gantry 3, and the nut body 11. Is formed in a shape that does not rotate with the fastening bolt 4 within the nut body housing frame 12, so that a hole error (dimension error) in the bolt hole 2 a 1 on the heavy object 2 side or the nut body is accommodated in the gantry 3. Even if there is an attachment error or the like at the time of welding the frame 12, these errors can be absorbed.

  As a result, when a heavy load 2 such as a power receiving facility such as a cubicle, a power distribution facility, an electrical facility, a communication facility, or an electric device is fixed to the gantry 3 with a plurality of fastening bolts 4, the last fastening bolt 4 is Even in the case of fastening, the nut body 11 that is freely movable within the nut body housing frame 12 can absorb the error and can be easily fastened, and the workability can be improved.

  In particular, in the movable nut 1 of the embodiment, the nut body accommodating portion 12 includes the three side plate portions 12b, 12c, 12d bent in the same direction from the three sides of the bottom plate portion 12a, and the remaining one side of the bottom plate portion 12a. So that the nut body 11 movable within the nut body housing portion 12 is prevented from falling off by the drop-off prevention pin 13 inserted into the pin hole 12a3 of the protruding portion 12a2 extending from the side plate portions 12b and 12d on both sides. 6 (a), the nut body housing frame 12 is first welded to the back side of the top plate 3a of the gantry 3, and then the back side of the top plate 3a of the gantry 3 as shown in FIG. 6 (b). The nut body 11 is inserted into the gap between the nut body housing frame 12 and the bottom plate portion 12a, and the drop-off prevention pin 13 is fitted into the pin hole 12a3 as shown in FIGS. 7 (a) and 7 (b). 1 is the top 3 of the gantry 3 It can be mounted on the back side.

  Therefore, not only can the number of welded portions of the nut body accommodating portion 12 be reduced and workability can be improved, but the nut body 11 can be prevented from being accidentally welded when the nut body accommodating portion 12 is welded. The movable nut 1 can be attached while ensuring the above.

  In the above embodiment, the nut body 11 is prevented from dropping out of the nut body housing frame 12 by the three side plate portions 12b, 12c, 12d and the dropout prevention pin 13 inserted into the pin hole 12a3 of the protruding portion 12a2. However, the present invention is not limited to this, and the protruding portion 12a2 is also folded in the same manner as the side plate portions 12b, 12c, and 12d so that the nut body 11 that is movable by the four side plate portions is prevented from falling off. But of course.

DESCRIPTION OF SYMBOLS 1 Movable nut 11 Nut body 11a Corner | angular part 11b Female screw hole 12 Nut body accommodating frame 12a Bottom plate part 12a1 Through-hole 12a2 Projection part 12a3 Pin hole 12b, 12c, 12d Side plate part 13 Fall prevention pin 13a Fall prevention pin body 13a1 Shaft part 13b Drop-off prevention engagement body 13b1 Insertion hole 13b2 Engagement part 2 Heavy object 2a Flange part 3 Base 3a Top plate 3a1 Through hole 4 Fastening bolt 4a Male screw shaft part 5a Washer 5b Spring washer 6 Welding part

Claims (2)

A nut body in which a female screw hole into which a male screw shaft portion of a fastening bolt is screwed is formed and a corner portion is provided on the outside,
A through hole having a diameter larger than the diameter of the female screw hole of the nut body is formed by welding to a gantry, and the nut body is movably accommodated at least in a horizontal direction, and the nut body A nut body housing frame that prevents its rotation with the fastening bolt when its corners hit the inner surface when rotating
A movable nut characterized by comprising: The movable nut according to claim 1,
The nut body has a rectangular shape in plan view,
The nut body accommodating portion is
A bottom plate portion in which a through hole of the fastening bolt is formed;
Having three side plate parts that are bent in the same direction from the three sides of the bottom plate part, and their tip parts are welded to the gantry,
The bottom plate portion extends without bending the remaining one side of the three sides provided with the three side plate portions and protrudes from the side plate portions on both sides, and the protruding portion includes the nut body. A movable nut, wherein a pin hole into which a drop prevention pin for preventing the nut body housed in the housing portion from being detached is formed.

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