JP4384112B2 - Air-ventilation facility air vent drop prevention device - Google Patents

Description

  In the present invention, a longitudinal air-conditioning ventilation control air outlet (air outlet, air inlet, etc.) attached to a ceiling board in a building is dropped due to a failure during installation or vibration such as an earthquake. The present invention relates to an apparatus for preventing the above-described problem.

  As shown in FIGS. 10 and 11, the conventional line-type air control opening is attached to an elongated groove-like opening provided in the ceiling board 10. It is structured to be attached to the side plate 17 of the neck portion which is a lower portion of the air restriction chamber box 16 suspended from the floor slab 12 via the suspension bolts 14. In the conventional attachment method, the neck portion side plate 17 of the air restriction chamber box 16 extending in the longitudinal direction is folded inward to form a neck turning portion 18, and a substantially trapezoidal anchor is formed on the neck turning portion 18. The plate 22 is seated, and the line-type air inlet main body 20 is suspended from the anchor plate 22 using a fastening screw 24 or the like.

  However, in the above-described structure, the anchor plate 22 is attached to the ceiling board 10 while being detached from the neck turnover portion 18 during construction for attaching the air restriction main body 20, or when subjected to earthquake vibration. In addition, the anchor plate 22 may be completely removed from the neck return portion 18, and the air restriction body 20 may be dropped from the groove of the ceiling board 10 into the lower room.

  Therefore, as a safety measure, a method is adopted in which the L-shaped metal fitting 26 is screwed to the inside of the air restriction chamber box 16, a fall prevention wire 28 is attached, and the other end is wound around the anchor plate 22.

When the effective size exceeds 2000 mm, the line-type air intake is divided by the manufacturer's standard, and the number of units (integer) obtained by dividing the air intake by 2000 is connected and installed. That is, the number N of connected units is calculated by rounding up if there are decimal places, where N = apparatus dimension ÷ 2000 and instrument dimension (mm).
As shown in FIG. 11, when the air restriction chamber box 16 has a length of 8 m, four air restriction ports 20 having a length of 2 m are connected in series. The connecting portion 19 is formed by connecting the seals by insertion and looks like one air-control opening on the appearance after mounting, but from the viewpoint of preventing the drop-off, the fall-prevention wire 28 is at least in front and back of each air-control opening body 20 If it is not installed in two places, it will hang down from the ceiling board when the air vent body falls, so 8 places are required in total. On the other hand, one anchor plate 22 is provided at both ends in the longitudinal direction when the air restriction body 20 is less than 1000 mm long, one at each longitudinal end and one at the center when the length is 1000 mm or more. The standard is used.

  However, the operation of attaching a predetermined number of the L-shaped metal fittings 26 and the fall prevention wires 28 is troublesome and takes a long time, resulting in an increase in operation cost. In addition, after the work, it is necessary to check whether the wire is correctly installed from the view A in FIG. The work of checking the installation status of the fall prevention wire is difficult to check from the floor because it is viewed from a narrow gap in the air vent body, and it is difficult to check from the floor. In addition to this, it takes a lot of time to move and install the scaffolding and the like, resulting in a further increase in cost.

Japanese Utility Model Laid-Open No. 61-1113815 “Equipment / Equipment Fall Prevention Clip” shows a method of using a chain-type hanging tool to prevent a lighting fixture or the like from dropping from the system ceiling. Since a chain is required, troublesome installation work and confirmation work are required.

A first object of the present invention is to provide an apparatus for preventing a line-type air conditioning ventilating air vent installed on a ceiling board from dropping and dropping due to a malfunction during installation or vibration such as an earthquake. There is.
The second object of the present invention is to reduce the work cost by not requiring an extra step for mounting and checking the fall prevention device.
The third object of the present invention is to secure work safety by not requiring dangerous work at high places for installation and confirmation of the fall prevention device.

In order to solve the above-described problems, the present invention provides an apparatus for preventing a line-type air conditioning vent for air conditioning ventilation equipment attached to a ceiling board from dropping from the ceiling board and falling off . In this device, a neck return portion is formed by folding back so that the lower end of the side plate of the air restriction chamber box extending in the longitudinal direction forms an acute angle toward the inside, and an anchor plate is placed on the neck return portion. The line-type air restriction body is suspended from the anchor plate by using a screw or the like, and at least one pair of spring arms extends from the center or near the side of the anchor plate to the left and right, and the spring arm Each tip of the spring is normally pressed to the inside of the side plate by the spring force, and each tip of the spring arm is bent downward to form an acute angle to form a hook. when the mold system air port main body is dropped and so the hook is hooked to the neck return part, thereby line-type air conditioner Care facilities for the system outlet port is adapted to be prevented from falling off to fall from the ceiling board.

  According to the present invention, even if the air restriction port main body falls due to vibration or the like, the spring mouth main body is prevented from falling from the ceiling by the respective tips of the spring arms being caught by the neck return portion of the chamber box. It will be possible to maintain sufficient safety.

  Since the attachment of the fall prevention device according to the present invention is performed at the same time as the attachment work of the air restriction port body and is completed at the same time, the attachment work process of the L-shaped metal fitting 26 before the attachment of the air restriction body is not required. Therefore, it is possible to significantly reduce the work cost.

  In addition, the installation of the fall prevention device according to the present invention is completed at the same time as the installation of the air vent main body on the ceiling, and therefore, it is not necessary to perform a dangerous high place work for confirming the installation status of the fall prevention device. Thus, the safety of the work can be achieved, and at the same time, the cost related to the confirmation required conventionally can be reduced.

  1 and 2 show a main part of a fall prevention device according to a preferred embodiment of the present invention, and FIG. 1 shows that a spring arm 42 formed of a wire-like torsion coil spring extends from the vicinity of the center of the anchor plate 32 to the left and right. FIG. 2 shows an embodiment in which a spring arm 52 made of a strip-shaped leaf spring extends from the vicinity of the side of the anchor plate 32 to the upper left and right.

  1A is a plan view of the fall prevention device, FIG. 1B is a front view, FIG. 1C is a side view, and FIG. 1D shows the shape of the template when the anchor plate is pressed.

  In the embodiment of FIG. 1, the anchor plate 32 is punched out of a thin plate in the shape of FIG. 1D, and its bearing bracket portion 36 is bent from the dotted portion 34 so that it is vertically upward as shown in FIG. 1B. A bolt 40 is inserted into the central hole 38 of the bracket portion 36, and a central hole portion of a spring arm 42 made of a wire-like torsion coil spring is inserted on the threaded portion of the bolt 40, and a nut 46 is inserted via a round washer 44. It can be tightened with.

  Each tip of the spring arm 42 is bent downward to form a hook 43, and the spring force is always pressed to the inside of the neck portion side plate 17 (FIG. 10). Further, since the hook 43 of the spring arm 42 is bent downward, it is hooked to the neck return portion 18 (FIG. 10) when the line type air inlet main body falls.

  The fall prevention device of FIG. 1 is configured as described above, so that even if the air-control opening body falls due to vibration or the like, the hook 43 of the spring arm 42 slips along the inner wall of the neck portion side plate 17 while the neck It will be caught by the return part 18 and it will stop, it can prevent that the air-control opening main body falls from a ceiling, and sufficient safety | security is maintained.

  Since the installation of the fall prevention device according to the present invention is performed at the same time as the installation work of the air restriction body, no extra installation work steps before and after attaching the air restriction body are required as in the prior art. Can be greatly reduced.

  In addition, since the installation of the fall prevention device according to the present invention is performed at the same time as the installation work of the air vent main body on the ceiling, it is completed at the same time, so a dangerous work at the height for checking the installation status of the fall prevention device is required. As a result, it is possible to further increase the safety of the work, and at the same time, it is possible to reduce the cost related to the confirmation that is conventionally required.

  In the embodiment of FIG. 2, a substantially concave spring arm 52 made of a strip-like plate spring is fixed on the anchor plate 32 by a fixing tool 54 such as a screw or a rivet. Further, each tip of the spring arm 52 is bent downward to form a hook 53, and when the line-type air inlet main body falls, the spring arm 52 is hooked to the neck return portion 18 (FIG. 10). Therefore, when the spring arm 52 is fixed on the anchor plate 32, the spring arm 52 extends from the vicinity of the side of the anchor plate 32 to the left and right upward.

  The fall prevention device of FIG. 2 is configured as described above, so that even if the air restriction body falls due to vibration or the like, the hook 53 of the spring arm 52 slides along the inner wall of the neck portion side plate 17 while the neck It will be caught by the return part 18 and it will stop, it can prevent that the air-control opening main body falls from a ceiling, and sufficient safety | security is maintained.

  FIG. 3 shows a process of attaching the fall prevention device shown in FIG. 1 to the neck portion side plate 17 of the air restriction chamber box 16. Since the spring arm 42 does not enter the neck portion side plate 17 when it is freely opened by the spring force, it is pushed up in the direction of the arrow B after being pinched by a hand to form a state 42a, and the hand is released and set. To do.

  FIG. 4 shows a state where the fall prevention device shown in FIG. 3 is set at a predetermined position in the neck portion side plate 17 of the air restriction chamber box 16. In this state, the hook 43 of the spring arm 42 is always pressed against the inside of the neck portion side plate 17 in the normal state by the spring expansion reaction force.

  FIG. 5 shows a state in which the air restriction body 20 is dropped from a predetermined position in the neck portion side plate 17 of the chamber box 16 due to vibration such as an earthquake. Since the fall prevention device according to the present invention is configured as described above, the hook 43 of the spring arm 42 slides along the inner wall of the neck portion side plate 17 while the air-control mouth body falls. Eventually, the hook 43 is caught by the neck return portion 18 and stopped, so that the air vent main body is prevented from falling from the ceiling, and safety can be maintained.

  FIG. 6 shows a process of attaching the fall prevention device shown in FIG. 2 to the neck portion side plate 17 of the air restriction chamber box 16. The spring arm 52 does not enter the side plate 17 of the neck portion when the spring arm 52 is freely opened by the spring force. To do.

  FIG. 7 shows a state in which the fall prevention device shown in FIG. 6 is set at a predetermined position in the neck portion side plate 17 of the air restriction chamber box 16. In this state, the hook 53 of the spring arm 52 is normally pressed against the inside of the neck portion side plate 17 by the spring extension reaction force.

  FIG. 8 shows a state where the air restriction body 20 is dropped from a predetermined position in the neck portion side plate 17 of the chamber box 16 due to vibration such as an earthquake. Since the fall prevention device according to the present invention is configured as described above, the hook 53 of the spring arm 52 slides along the inner wall of the neck portion side plate 17 while the air-control mouth body falls. Eventually, the hook 53 is caught by the neck return portion 18 and stopped, so that the air vent main body can be prevented from falling from the ceiling, and safety can be maintained.

  FIG. 9 shows a main part of a fall prevention device according to a third embodiment of the present invention, and is an example in which a spring arm is constituted by a pair of strip-like movable arms 61 and 62 and a torsion coil spring 65. 9A is a plan view of the fall prevention device, FIG. 9B is a front view, FIG. 9C is a side view, FIG. 9D is a shape of a template when the anchor plate is pressed, and FIG. 9E is a bolt nut on the anchor plate. FIG. 9F is a perspective view showing a state in which the fall prevention device is fastened with bolts and nuts onto the anchor plate.

  In the embodiment of FIG. 9, the anchor plate 32 is punched out of a thin plate in the shape of FIG. 9D, and its bearing bracket portions 66, 66 are bent from the dotted line portion 64, respectively, so that they are vertically upward as shown in FIG. 9B. . 9E, a bolt 60 is inserted into the center hole 38 of the bracket portion 66, and an arm 62, a wire-like torsion coil spring 65, and an arm 61 are arranged in this order on the threaded portion of the bolt 60. Each hole portion is inserted and tightened with a nut 68.

  The ends of the arms 61 and 62 are bent downward to form a hook 63, and are normally pressed against the inner side of the neck portion side plate 17 by receiving the spring force of the torsion coil spring 65. Further, since the hooks 63 of the arms 61 and 62 are bent downward, the hooks are hooked on the neck return portion 18 when the line-type air inlet body is dropped.

  The fall prevention device of FIG. 9 is configured as described above, so that each hook 63 of the arms 61 and 62 is slipping along the inner wall of the neck portion side plate 17 even if the air restriction port body falls due to vibration or the like. Thus, the neck return portion 18 is caught and stopped, so that the air vent main body can be prevented from falling from the ceiling, and sufficient safety can be maintained.

  As described above in detail, according to the air ventilating equipment air vent vent fall prevention device according to the present invention, even if the air vent main body falls due to vibration or the like, the spring arm acts as a stopper, and each tip By catching on the neck return portion of the chamber box, it is possible to prevent the air restriction port main body from falling from the ceiling, and sufficient safety is maintained. Since the installation of the fall prevention device according to the present invention is performed at the same time as the installation work of the air restriction body, no extra installation work steps before and after attaching the air restriction body are required as in the prior art. Can be greatly reduced. Since the installation of the fall prevention device according to the present invention is performed at the same time as the installation of the air-control opening body on the ceiling and is completed at the same time, dangerous installation work for installation and confirmation of the fall prevention device is not required. Therefore, the technical value of the work is extremely remarkable.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic showing the 1st Example of the fall prevention apparatus by this invention. The schematic sectional drawing showing the 2nd Example of the fall prevention apparatus by this invention. The schematic sectional drawing showing the process of attaching the fall prevention apparatus of 1st Example to the air-control opening chamber box. The schematic sectional drawing showing the state which attached the fall prevention apparatus of 1st Example to the air-control opening chamber box. The schematic sectional drawing showing the operation state of the fall prevention apparatus of 1st Example. The schematic sectional drawing showing the process of attaching the fall prevention apparatus of 2nd Example to the air-control opening chamber box. The schematic sectional drawing showing the state which attached the fall prevention apparatus of 2nd Example to the air-control opening chamber box. The schematic sectional drawing showing the operation state of the fall prevention apparatus of 2nd Example. Schematic showing the 3rd Example of the fall prevention apparatus by this invention. The schematic sectional drawing showing the attachment state of the conventional fall prevention wire. The schematic sectional drawing showing the attachment position of the conventional fall prevention wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Ceiling board 16 Air vent chamber box 17 Neck part side plate 18 Neck return part 20 Line type air vent main body 22, 32 Anchor plate 42 Spring arm 43 Hook 52 Spring arm 53 Hook 61, 62 Movable arm 63 Hook

Claims (2)

A device that prevents the air-conditioning ventilator installed on the ceiling board from falling off the ceiling board and falling off ,
The neck return portion is formed by folding the lower end of the side plate of the air vent chamber box extending in the longitudinal direction so as to form an acute angle toward the inside,
An anchor plate is placed on this neck turnover,
The line-type air inlet body is suspended from this anchor plate using screws,
At least one pair of spring arms extends from the center or side of the anchor plate to the upper left and right,
Each tip of the spring arm is normally pressed against the inside of the side plate by its spring force.
Furthermore, each tip of the spring arm is bent downward to form an acute angle to form a hook, and when the line type air inlet body falls, the hook is hooked to the neck return portion,
This prevents the air-conditioning ventilating equipment air-conditioning ventilator from falling off the ceiling board and falling off the ceiling-type air- ventilating equipment air- venting ventilating equipment.   The fall prevention device according to claim 1, wherein the spring arm is formed of a wire-like torsion coil spring, a band plate-like plate spring, or a combination of a torsion coil spring and a band plate-like movable arm.

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