JP2006026916A - Insert for screwing suspension bolt and insert attaching operation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insert for screwing a suspension bolt not obstructing the passage of a worker held to a vertical posture even if brought to a contact or stepped-on state and developing flame barrier action or a smokeproof effect to be enhanced in fireproofness. <P>SOLUTION: The insert 3 is composed of an inner member 1 and an outer member 2. The former is equipped with a shaft body 9 having a screw hole 4 formed thereto to extend up and down and the cap-shaped head 10 formed to the upper part of the shaft body while the latter is equipped with the pull-off preventing flange-like stopper 14 upwardly formed from the neck part 13 facing to the edge part of a drilled hole and the locking leg 16 capable of being expanded by the slit 15 downwardly formed from the neck part 13 in an up and down direction. The cap-shaped head 10 has a size covering the flange-like stopper 14 to seat a peripheral edge 12 on the deck plate surface provided to the periphery of the drilled hole 11 when the inner member 1 is struck from above by the outer member 2 and a taper 17 protruded outward when pushed rearward by the shaft body 9 progressing inside is formed to the inner surface of the locking leg 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a suspension bolt screwing insert and an insert mounting operation method. More specifically, the present invention relates to an insert used to suspend a required object when a suspended ceiling structure or the like is constructed on a ceiling plate material such as a deck plate, and the like. It relates to a method of attaching the insert.

  The deck plate is a corrugated plate made of steel with several ridges that keep a constant cross-sectional shape, with the ridge horizontal ridges and the valley horizontal ridges repeating through the inclined web ridges. For example, when a large number of steel beams are arranged on a steel beam and concrete is placed on the upper surface thereof, a composite floor board of a building is formed.

  As shown in FIG. 6, a ceiling structure is constructed on the lower surface of the composite slab deck plate 5 that forms a composite floor plate 22 in combination with the placed concrete 21. An insert 23 is attached to the deck plate, and a method for realizing a suspended ceiling structure through the insert has been around for a long time.

  An example of the insert is described in JP-A-4-148903. This is because the insert 23 is fixed to either the ridge horizontal ridge 6 or the valley horizontal ridge 7, and the internal thread engraved inside the cylinder body opens downward, and the upper end of the suspension bolt 20 Are screwed on. A field edge receiver 25 is attached to the lower end of the suspension bolt via a suspension fitting 24, a field edge 26 is fixed to the field edge receiver via a clip or the like, and a ceiling board (not shown) is attached to the lower edge of the field bolt. It is done.

  At the lower end portion of the cylinder body, a collar portion 27 that is seated on the plate is provided. The insert 23 is disposed so as to face the perforation 11 formed in the horizontal ridge of the peak, and the upright posture is maintained by engaging a jig corresponding to the suspension bolt 20 with the female screw portion from below the deck plate 5. . When concrete is placed on the top surface of the deck plate in this state, the insert is embedded in an upright state. The concrete 21 holds the entire insert, and the cylinder body and the buttock bite into the concrete to promote integration. If the jig is removed and the deck plate is looked up, the female thread portion can be seen through the perforation 11, and a suspension bolt can be screwed onto it.

  Thus, when the insert is positioned only on the upper side of the perforation, a bar-shaped jig that holds the posture from below is required. In Utility Model Registration No. 2584902, an insert that does not require a jig is proposed by inserting a part of a cylindrical portion into a perforation. This has a hook at the bottom of the cylindrical portion and a locking tongue piece that can be elastically deformed immediately below. When the cylinder is pushed into the perforation from above, the hook stops when it reaches the top surface of the deck plate, but the locking tongue that has passed through the perforation is restored and the deck plate is sandwiched between the hook and the tongue.

  This insert also has another ridge at the upper end of the cylindrical part, so that the upper heel engages with the concrete only after hitting the concrete on the deck plate, so that the vertical posture of the insert is firmly held It has become. In other words, in a state before placing concrete, the deck plate is in a state of being scattered only by sandwiching the deck plate. Therefore, in order to increase the hold by concrete, it is preferable that the cylindrical portion is long. In other words, sandwiching the deck plate between the hook and tongue only has the implications of temporarily attaching the insert.

  By the way, because the deck plate is also a scaffold for construction work, workers often walk. Reinforcement reinforcing bars may be built on the deck plate before the concrete is placed, and it is avoided that workers inadvertently pinch and kick the set inserts. Absent. This is because, in order to achieve the posture maintenance with the concrete that has been touched on, but has been placed, the dimensions protruding on the deck plate are secured.

  Of course, if the worker disturbs the tempered state of the insert, it must be reworked. On the contrary, when installing the insert after the bar arrangement, the reinforcing bar becomes an obstacle and the work load is large. In order to eliminate the former disadvantage, there are inserts that automatically return to the upright position even if the worker falls down by applying a coil spring to the cylindrical part, but it cannot be denied that it is expensive. The installation work is also complicated and complicated.

  In any case, since it is intended to be used in the case of a synthetic floor board in which concrete is placed on the deck plate, it is intended to solidify the posture of the insert by solidifying the concrete. On the other hand, an example of using a deck plate without hitting concrete has recently been seen. In this case as well, a hole may be made in the plate, and an insert may be attached to support the ceiling board, and various pipes / wiring may be supported.

In the case of this outer heat insulating metal roof foundation method, if the insert has the above structure and shape, the posture cannot be stabilized because there is no concrete. Not only that, there are also fire protection problems. That is, since the flame propagates from the slight gap remaining in the perforations provided in the deck plate, the smoke leaks, and there is no obstruction such as concrete, it is difficult to ensure the fire prevention surface.
Japanese Patent Laid-Open No. 4-148903 Utility Model Registration No. 2584902

  The present invention has been made in view of the above problems, and its purpose is not to hinder the walking of workers when a metal plate is used as a deck plate for a synthetic floor board, even if it is touched or stepped on. Suspension bolts that do not break the vertical posture and that can be applied to metal roof foundation deck plates where concrete is not placed to enhance the fire resistance by exhibiting a flameproof and smokeproof effect. It is to provide a screw-inserting insert and a method of attaching the same.

  In the present invention, in order to suspend a required object under a metal plate having a continuous constant corrugated cross section and extending in the longitudinal direction, the object is suspended in a screw hole that is fixed to a perforation provided in the metal plate and opens downward. It is applied to the insert for ceiling plates in which the upper end of the bolt is screwed. Referring to FIG. 1, the feature is that an inner member 1 including a shaft cylinder 9 in which a screw hole 4 is formed and extending vertically and a shade head 10 formed on the upper part thereof, and a perforation 11 (FIG. 5). (See (b) of Fig. 5)), a flange-shaped stopper 14 for preventing a hole from being removed and a slit 15 formed downward from the neck 13 and extending vertically. The outer member 2 includes a locking leg 16 that can be crotch. When the inner member 1 is struck into the outer member 2 from above, the cap head 10 is sized so as to cover the hook-shaped stopper 14 and the peripheral edge 12 is seated on the deck plate surface around the perforations 11 (see FIG. )), And the inner surface of the locking leg 16 is formed with a taper 17 that protrudes outward when it is pushed back by the shaft barrel 9 that has entered.

  As shown in FIG. 1 (b), the invention of the insert mounting operation method includes an inner member 1 including a shaft cylinder 9 in which a screw hole 4 is formed and extending vertically, and a cap-shaped head 10 formed on the upper portion thereof. An outer provided with a hook-shaped stopper 14 formed on the upper side from the neck portion 13 facing the perforation edge and a locking leg 16 formed on the lower side of the neck portion 13 and capable of expanding by a slit 15 entering in the vertical direction. The outer leg 2 is fitted to the metal plate 5 by passing the locking leg 16 through the perforation 11 in a state where the lower end of the shaft barrel 9 is fitted to the neck 13 while being overlapped with the member 2 (see FIG. 5C). reference). By simply hitting the cap-shaped head 10 of the inner member 1, the inner member 1 is fastened to the locking leg 16 and expanded to fix the insert 3 to the metal plate 5. Further, the cap-shaped head 10 has a hook-shaped stopper. 14, while the peripheral edge 12 is covered with the metal plate surface around the perforation 11 (see FIG. 4B).

  According to the present invention, when the inner member is struck into the outer member from above, the cap-shaped head covers the hook-shaped stopper and the peripheral edge is seated on the plate surface around the perforation. It is a low one with only a cap head. When it is applied to a deck plate for a synthetic floor board, even if a bar arrangementr moves on and off the deck, it will not trip over it and will not disturb its posture even if it steps on it.

  Even when applied to a metal roof foundation deck plate where concrete is not placed, such as an outer heat insulating metal roof foundation method, the cap head is in a state of covering the perforations, thus preventing the passage of flames and smoke and providing high fire resistance It becomes an insert. Even if the outer member is made of a flammable material and disappears, the insert continues to sit on the plate with the weight of the suspension, and the perforation is still kept closed by the cap head.

  According to the insert mounting operation method, simply hitting the cap-shaped head with a hammer or the like, the outer member is pushed into the perforation, the locking leg is expanded by entering the inner member, and the periphery of the cap-shaped head is placed on the top surface of the deck plate. Can be seated. Inserts can be fixed and held in a single operation without placing concrete on a metal roof foundation deck plate.

  The suspension bolt screwing insert and the insert mounting operation method according to the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an outer surface and a cross section of an insert 3 composed of an inner member 1 and an outer member 2. The inner member 1 is shown in FIGS. 2 (a) to (d), and the outer member 2 is shown in FIGS. Details of each are shown in d). In order to suspend a ceiling base or the like, the suspension bolt is fixed to a perforation formed in the deck plate as described later, and a suspension bolt can be screwed into a screw hole 4 that opens downward.

  Although the deck plate 5 has been described in the description of FIG. 6, the deck plate 5 has a constant corrugated cross section that is continuous so that the ridge horizontal ridge 6 and the valley horizontal ridge 7 repeat through the inclined web ridge 8. Extending in the longitudinal direction. If concrete is placed after reinforcing reinforcement is placed on this, a composite floor board structure is obtained, and if not placed, an outer heat insulating metal roof base is formed. As described above, the deck plate is widely used for both the wet method and the dry method, and the insert according to the present invention can be applied to both.

  Referring to FIG. 2, the inner member 1 includes a shaft cylinder 9 in which a screw hole 4 is formed and extends vertically, and a shade head 10 formed on the upper portion thereof. As described later, when the inner member 1 is struck into the outer member 2 from above as shown in FIG. 4, the ridge-shaped head or the valley-shaped horizontal ridge 7 of the deck plate 5 is formed as shown in FIG. And has a hanging edge 12 seated on the peripheral surface of the perforation 11 provided on the surface. This inner member 1 is a metal product in principle and has hardness and strength that does not deform even when hit by a hammer.

  FIG. 3 shows the outer member 2, which can be expanded by a collar-shaped stopper 14 for preventing a hole from being removed from the neck 13 facing the perforation edge, and a slit 15 that is formed below the neck and enters the vertical direction. And the latching leg 16 thus formed. As shown in FIG. 4, this is inserted into the perforation 11 from above. The inner surface of the locking leg 16 is formed with a taper 17 (see also (d) of FIG. 3) that projects the locking leg outward when it is pushed back by the shaft barrel 9 that has entered. The hook-shaped stopper 14 is given a smaller diameter than the cap-shaped head 10 and has a diameter and a thickness so that the cap-shaped head is completely covered (see FIG. 4B).

  Since the inner member 1 needs to be able to expand the locking leg 16 (see FIG. 4A), the outer member 2 is made of a material that can be deformed to some extent. Generally, a plastic material can be used, and nylon 66 is sufficient. A soft metal such as aluminum or lead may be used. The former may disappear in the event of a fire, but since the fire protection by the cap-shaped head 10 is performed as described later, the material selection range of the inner member is widened.

  When the inner member 1 described above is struck into the outer member 2 from above, as shown in FIG. 4B, the cap head 10 covers the hook-shaped stopper 14 and the peripheral edge 12 is around the perforation 11. Since the seat is seated on the deck plate surface, only the shade head 10 can be seen on the top surface of the insert plate itself. The cap head may be sufficient to cover the hook-shaped stopper 14 and can be, for example, 3 to 5 mm high. Since it can be made low in this way, when applied to the wet method deck plate, the worker who arranges the reinforcing material hardly trips and the posture is not disturbed even if it is stepped on.

  Even if it is applied to a deck plate as an outer heat insulating metal roof base where concrete is not placed, and it is made of a flammable material to increase the degree of deformation of the outer member 2, it is burned by fire and voids are created. Even if it occurs, the cap head 10 on which the weight of the suspended object still acts keeps the perforations 11 closed. The passage of flames and smoke is blocked, making the insert excellent in fire resistance.

  Next, the procedure for applying the insert 3 to the deck plate 5 and performing the mounting operation will be described. First, as shown in FIG. 5A, a hole having a desired diameter is formed by a drill or the like 18 in order to form the perforations 11 in the deck plate 5. Since it is sufficient that the neck portion 13 of the outer member 2 can be inserted into this hole, the diameter is naturally smaller than that of the hook-shaped stopper 14 as shown in FIG. For example, it is 15 millimeters, which is slightly larger than the outer diameter of the locking leg 16 in the free state. The deck plate 5 has a thickness of about 1.5 mm.

  Next, the inner member 1 including the shaft cylinder 9 and the cap-shaped head 10 is overlaid on the outer member 2 including the hook-shaped stopper 14 and the locking leg 16 (see also FIG. 1B). The locking leg 16 is passed through the perforation 11 in a state where the lower end portion is fitted to the inner surface of the neck portion 13, and the outer member 2 is fitted to the deck plate 5. As shown in FIG. 5C, when the cap head 10 of the inner member 1 is struck with the hammer 19, the shaft barrel 9 of the inner member is tightly attached to the locking leg 16 and expanded, as shown in FIG. The insert 3 is fixed to the deck plate 5. At the same time, as shown in FIG. 4 (b), the cap head 10 covers the saddle-shaped stopper 14, and the hanging edge 12 is seated on the surface around the perforation. After the insert 3 is fixed to the deck plate 5, the suspension bolt 20 may be screwed in as shown in FIG.

  Since this operation is performed in a series, an increase in work load and time can be avoided. In other words, since the insert is fixed without placing concrete, the insert is mounted in a single process, whether the deck plate is used as an outer heat insulating metal roof base or as a synthetic floor board. As a result, the operation is unbelievably simple with the inserts that have been adopted. Moreover, although there was no insert that can be used in combination with the outer heat insulating metal roof base, the present invention realized an insert that can be used for both purposes.

  As described above in detail, according to the suspension bolt screwing insert of the present invention, the protrusion on the upper surface of the metal plate is suppressed as much as possible, preventing the worker from walking or conversely being damaged by the worker. You do n’t have to. The fire prevention function is improved and the workability is improved, resulting in an unparalleled insert.

The suspension bolt screwing insert which concerns on this invention is shown, (a) is a front view, (b) is the BB arrow directional cross-sectional view in (a). The single inner member is shown, (a) is a top view, (b) is a front view, (c) is a bottom view, and (d) is a cross-sectional view. The single member of an outer member is shown, (a) is a top view, (b) is a front view, (c) is a bottom view, and (d) is a sectional view. The inner member is struck into the outer member, (a) is an external view, and (b) is a cross-sectional view. Process drawing which shows the procedure which attaches insert to a deck plate. A three-dimensional view of a structure in which an example of a conventional insert is mounted on a deck plate and the ceiling base is suspended.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Inner member, 2 ... Outer member, 3 ... Insert, 4 ... Screw hole, 5 ... Deck plate (metal plate), 9 ... Shaft cylinder, 10 ... Shade head, 11 ... Perforation, 12 ... Hanging edge (periphery) , 13 ... neck, 14 ... hook-shaped stopper, 15 ... slit, 16 ... locking leg, 17 ... taper, 20 ... suspension bolt.

Claims (2)

In order to suspend a required object under a metal plate having a continuous constant corrugated cross section and extending in the longitudinal direction, the upper end of a suspension bolt is fixed to a perforation provided in the metal plate and opened downward. In the ceiling plate insert to which the part is screwed,
An inner member provided with a shaft cylinder in which the screw hole is formed and extending vertically, and a cap-shaped head formed on the upper part;
A hook-shaped stopper inserted into the perforation from above and formed upward from the neck facing the perforation edge, and a latch that can be expanded by a slit formed downward from the neck and entering the vertical direction. An outer member with a leg,
When the inner member is struck into the outer member from above, the shade head covers the hook-shaped stopper and the periphery is sized to sit on the deck plate surface around the perforation,
The suspension bolt screwing insert characterized in that a taper is formed on the inner surface of the locking leg so as to protrude outward when it comes into contact with the shaft barrel that has entered. In order to suspend a required object under a metal plate that has a continuous constant corrugated cross section and extends in the longitudinal direction, an insert for screwing the upper end of a suspension bolt into a screw hole that opens downward is attached to the metal plate. In the method of attaching to the drilled holes provided,
An inner member having a shaft cylinder in which the screw hole is formed and extending in the vertical direction and a cap-shaped head formed on the shaft cylinder is formed from a collar-shaped stopper for preventing a hole from being removed from the neck facing the perforation edge and the neck. It is overlapped with the outer member provided with a locking leg which is formed below and can be expanded by a slit entering in the up-down direction, and the locking leg is passed through the perforation with the lower end of the shaft barrel fitted to the neck. Fit the member on the metal plate,
By simply hitting the inner member's cap head, the inner member is fastened to the locking leg and expanded to fix the insert to the metal plate. A mounting operation method for a hanging bolt screwing insert, characterized by being seated on a metal plate surface around a perforation.

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