JPH0717685A - Duct setting hoist device - Google Patents

Abstract

PURPOSE:To execute quickly and easily setting up a duct by utilizing a duct supporting bar suspended to a structure and a receiving angle stopped to this duct supporting bar, and lifting a duct lifter by a drive motor. CONSTITUTION:When a duct A is set up by utilizing a duct supporting bar 1 suspended to a structure and a receiving angle 7 stopped to this duct supporting bar, each lifting frame 10, 10 of a duct lifter 9 is tightened to both end sides of the receiving angle 7. A wire hoisting mechanism part 19 is fastened to the center of the receiving angle 7. Next after mounting fixed pulley parts 3 on the respective duct supporting bars 1, the duct A to be set up is mounted one the lifting frames 10, 10, and an operating switch is operated to drive a hoist drum 23 rotated in a winding direction. When the duct lifter 9 is lifted to the duct supporting bar 1, by screwing a nut to a screw part of the duct supporting bars 1, 1 from a lower surface side of the receiving angle 7 to support it, the duct A can be arranged under a ceiling slab 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct installation hoisting device suitable for use in suspending ducts for air conditioning, exhaust, etc. in structures such as buildings and underpasses.

[0002]

2. Description of the Related Art Generally, ducts for air conditioning, exhaust, etc. are made of long rectangular or round tubular bodies, and a plurality of pairs of duct support rods are vertically installed at a predetermined interval on a ceiling of a structure. Then, the receiving angles are attached to these duct support rods to support the ducts so that they are arranged under the ceiling.

Conventionally, the work of suspending the duct from the ceiling is performed by lifting the duct to the vicinity of the ceiling by a plurality of workers or lift cars.

[0004]

However, among the above-mentioned conventional techniques, the method of lifting by an operator is inefficient, labor costs increase, and it is difficult to install a heavy duct or a long duct. It has the drawback of being difficult. Further, there is a problem that the lift car cannot be used in a place where the footing is poor such as a stage.

The present invention has been made in view of the above-mentioned drawbacks and problems of the prior art, and utilizes a duct support rod vertically installed on a structure for installing a duct and a receiving angle attached to the duct support rod. Focusing on (1), the present invention provides a duct installation hoisting device that allows one worker to easily and quickly perform the duct installation work.

[0006]

Means for Solving the Problems The means of the present invention constructed to solve the above-mentioned problems is to attach / detach to / from a support rod which is vertically erected at a predetermined interval on a structure, each of which is a combination of left and right. It has a pair of left and right fixed pulley parts that are freely attached and detached, and a duct lifter that is suspended up and down on the constant pulley part through a hoisting wire, and the duct lifter is attached to the pair of duct support rods. Left and right lifting frames detachably provided on both longitudinal ends of a duct support member to which both longitudinal ends are attached, and left and right movable sheave portions provided on the lifting frames and the left and right. And a wire hoisting mechanism portion having a hoisting drum that is removably provided on the duct supporting member and is driven by a drive motor. The left and right lifting frames The left and right intermediate portions connected to the both ends are respectively wound around the left constant pulley portion to the left movable pulley portion and from the right constant pulley portion to the right movable pulley portion, and the middle portion is The wire winding mechanism is wound around the winding drum.

[0007]

The pair of left and right fixed pulley parts are firmly attached to the pair of duct support rods that are vertically provided from the structure. The hoisting wire wound between each constant pulley section and the duct lifter is wound up by rotationally driving the hoisting drum of the wire hoisting mechanism section. A duct to be installed is placed on the duct lifter, and the duct is lifted to the position of the duct support rod as the duct lifter rises.

After the duct supporting member is attached to the duct supporting rod to support the duct, the lifting frame and the wire hoisting mechanism are removed from the duct supporting member, and the hoisting drum is reversely rotated to lower the duct lifter. Finally, remove each fixed pulley unit from the duct support rod.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. In the figure, reference numerals 1 and 1 denote a pair of left and right duct support rods, each of which is a rod body having a threaded portion engraved on its outer peripheral surface. The pair of duct support rods 1 and 1 are oriented in the arrangement direction of the duct A. The ceiling slab 2 is vertically provided at predetermined intervals.

Reference numerals 3 and 3 denote a pair of left and right constant pulley portions that constitute a duct installation hoisting device together with a duct lifter 9 described later. As shown in FIGS. 1 to 5, each constant pulley unit 3 includes a vehicle body 4 and a pair of constant pulleys 5 and 5 pivotally supported by the vehicle body 4.
The support rod holding body 6 is attached to the outer surface of the vehicle body 4. One side of the support rod holding body 6 is fixed to the vehicle body 4, the other side is pin-connected to the vehicle body 4 to be rotatable, and support rod fitting concave grooves 6A1 and 6B1 are vertically formed on the abutting surface. It is composed of a pair of holding pieces 6A, 6B, and a tightening screw 6C for fastening the holding pieces 6A, 6B so that they can be contacted and separated.

Reference numeral 7 is a receiving angle as a duct supporting member,
Support rod insertion holes 8 are provided at both longitudinal ends of the receiving angle 7,
8 is drilled.

Reference numeral 9 denotes a duct lifter suspended up and down by the pair of constant pulley portions 3 and 3 via a winding wire 29 described later. 10 and 10 constitute the duct lifter 9,
A pair of left and right lifting frames detachably attached to both ends of the receiving angle 7 in the longitudinal direction is shown.

Here, each of the lifting frames 10 is provided with a vertically oriented base plate 10A, and a rectangular tubular front side holding body 1 which is provided so as to project inwardly from the base plate 10A and whose upper surface serves as a duct receiving surface.
0B and a rear side clamping plate 10D which is arranged so as to face the front side clamping body 10B and can be moved back and forth by a tightening screw 10C.
And a duct receiving plate 10E projecting inwardly from the substrate 10A. As shown in FIG. 6, both sides of the receiving angle 7 are provided between the front holding body 10B and the rear holding plate 10D. It is designed to sandwich.

Reference numerals 11 and 11 denote the duct A and the duct support rod 1,
Lifting frame 10, 1 to align with 1.
0 shows a pair of left and right guide cylinders provided at 0. Each of the guide cylinders 11 is composed of half-split bodies 11A and 11B, and the inside has a pyramid-shaped guide hole 11C which is tapered downward, and the lower end has an opening 11D through which the duct support rod 1 is inserted. The respective half-split bodies 11A and 11B are fixed pieces 1 fixed to the front side sandwiching body 10B and the duct receiving plate 10E.
It is attached to Nos. 2 and 12 via connecting screws 13 and 13, and is rotatable as shown in FIG.

A wire locking piece 14 is projected on the outer surface of each substrate 10A. A wire guide wheel 15 and a wire guide roller 16 are axially mounted on the inside of each front side holding body 10B, and a receiving angle tightening screw 17 is screwed on the front side.

Further, reference numerals 18 and 18 denote a pair of left and right moving pulley portions constituting the duct lifter 9. Each moving pulley portion 18 is a substantially U-shaped mounting bracket 18A fixed to the outer surface of the base plate 10A, and The moving pulley 18B is axially mounted between the mounting bracket 18A and the substrate 10A.

Reference numeral 19 denotes a wire lift mechanism portion which constitutes the duct lifter 9 and is detachably provided at the center of the receiving angle 7 in the longitudinal direction. The wire hoisting mechanism portion 19 has a mounting screw 20.
Is detachably attached to the receiving angle 7 and has a substantially box-shaped housing 21 having openings 21A, 21A on both side surfaces.
And the reversible electric motor 2 installed in the housing 21.
2 and the hoisting drum 2 provided on the reversible electric motor 22
3 and the housing 2 located on both sides of the hoisting drum 23.
The reversible electric motor 22 is composed of a pair of upper and lower guide rollers 24 and 25 that are axially mounted on the shaft 1. The reversible electric motor 22 has an operation switch 26 having a start / stop button 26A and a forward / reverse switching button 26B and a long length. It is electrically connected via a signal line 27. Further, 28 indicates a power cord.

Reference numeral 29 denotes a hoisting wire for supporting the duct lifter 9 between the pair of duct support rods 1, 1 so as to be able to move up and down. The hoisting wire 29 has wire locking pieces 14, 14 at both ends 29A, 29A. Is locked to. Then, the hoisting wire 29 has two ends 29A, an intermediate portion 29B following the 29A,
29B is wound in order from one fixed pulley 5 to the moving pulley 18B, the other fixed pulley 5, and the wire guide wheel 15, and an intermediate portion 29C is wound around the hoisting drum 23.

The present embodiment is constructed as described above, and its operation will be described below.

First, the lifting frames 10 and 10 of the duct lifter 9 are fastened to both ends of the receiving angle 7.
At this time, the support rod insertion hole 8 of the receiving angle 7 and the guide tube 11
11D and the opening 11D are matched. Further, the wire winding mechanism portion 19 is fastened to the center of the receiving angle 7. Then, with the constant pulley portions 3 and 3 and the duct lifter 9 placed on the floor, the hoisting wire 29 is wound between the constant pulley portion 3 and the duct lifter 9 to be loosened as a whole.

Next, each constant pulley unit 3 is attached to each duct support rod 1. In this mounting work, the tightening screw 6C is loosened to open the holding pieces 6A and 6B of the support rod holding body 6 as shown in the figure, and the duct support rod 1 is held between the two holding pieces 6A and 6B by the tightening screw 6C. It is done by firmly tightening.

Then, one end of the duct A to be installed in the longitudinal direction is placed on the lifting frames 10 and 10, and the operating switch 26 is operated to rotate the hoisting drum 23 in the winding direction. As a result, the hoisting wire 29 is sequentially wound around the hoisting drum 23, and the duct lifter 9 is eventually lifted.

When the duct lifter 9 rises to the lower end of the duct support rod 1, each guide cylinder 11 starts to fit into the duct support rod 1, and when the duct lifter 9 further rises, the duct support rod 1 penetrates the guide cylinder 11. Further, it is inserted into the support rod insertion holes 8 of the receiving angle 7, and the duct lifter 9 lifts the duct A to a predetermined installation position with respect to the duct support rods 1 and 1. Then, by screwing a nut (not shown) onto the duct supporting rods 1 and 1 from the lower surface side of the receiving angle 7, the duct A is supported by the duct supporting rods 1 and 1 and the receiving angle 7.

After supporting one side of the duct A as described above, the tightening screw 10C is loosened to lift the lifting frame 1
0, 10 loosen the tightening screw 20 and wire winding mechanism 1
9 from the receiving angle 7 respectively, the winding drum 23
Is reversed and the hoisting wire 29 is loosened to lower it to the floor. Next, the tightening screw 6C is loosened to open the holding pieces 6A and 6B, and the constant pulley portions 3 and 3 are removed from the duct support rods 1 and 1.

Thereafter, the constant pulley portions 3 and 3 are attached to the other pair of adjacent duct support rods 1 and 1 as described above, and the other end of the duct A in the longitudinal direction is connected by the duct lifter 9 as described above. And lift it up, duct support rods 1 and 1 and receiving angle 7
The duct A can be disposed below the ceiling slab 2 by being supported by.

It should be noted that the above-mentioned work of arranging the duct A is carried out by simultaneously lifting both ends of the duct A by using two sets of the constant pulley portions 3 and 3 and the duct lifter 9 as shown in FIG. This makes it more efficient.

Further, in this embodiment, the guide cylinders 11 and 11 are provided in the duct lifter 9 to guide the lifting frames 10 and 10 to the duct support rods 1 and 1, so that the lifting frame 10 may slightly move while it is rising. Even if there is shaking, the duct A can be positioned reliably and promptly, and each duct support rod 1 can be reliably inserted into the duct insertion hole 8 of the receiving angle 7.

Further, since the lifting frames 10 and 10 and the wire winding mechanism portion 19 are detachably attached to the receiving angle 7, it can be used as a receiving angle having a length corresponding to the size of the working place. .

[0029]

Since the present invention is constructed as described above in detail, it has the following effects. (1) A plurality of workers are conventionally required because the duct lifter is vertically mounted on the structure for installing the duct and the receiving angle attached to the duct is used to raise the duct lifter by the drive motor. 1 duct installation work
Even a human worker can perform it easily and quickly.

(2) The duct installation work can be easily and safely performed even in a place where the scaffolding is poor such as when the lift car cannot be used.

(3) Since the duct is lifted by using the drive motor and the moving pulley portion, it is possible to easily install a heavy duct or a long duct which has been difficult by human power. .

[Brief description of drawings]

FIG. 1 is a front view of a hoisting device for installing a duct according to an embodiment of the present invention with a part thereof broken away.

FIG. 2 is an external perspective view of a hoisting device for installing a duct.

FIG. 3 is a left side view of a constant pulley section.

FIG. 4 is a plan view of a constant pulley portion.

FIG. 5 is a right side view of the constant pulley portion.

FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG.

FIG. 7 is a left side view of the lifting frame.

FIG. 8 is a plan view of a lifting frame.

FIG. 9 is an external perspective view of a receiving angle.

FIG. 10 is an explanatory diagram showing another usage state of the duct installation hoisting device.

[Explanation of symbols]

 1 Duct Support Rod 3 Constant Pulley Section 7 Receiving Angle 9 Duct Lifter 10 Lifting Frame 18 Moving Pulley Section 19 Wire Hoisting Mechanism Section 22 Reversible Electric Motor 23 Hoisting Drum 29 Hoisting Wire

Claims (1)

[Claims] 1. A pair of left and right fixed sheave parts detachably attached to a support rod composed of a pair of left and right pairs vertically suspended on a structure at a predetermined interval, and a hoisting wire. A duct lifter that is suspended from the pair of constant pulleys so as to be lifted up and down, and the duct lifter is attached to and detached from both ends in the longitudinal direction of a duct support member that is attached to the pair of duct support rods at both longitudinal ends. Freely provided left and right lifting frames, left and right moving sheave portions provided on the lifting frame, and detachably provided between the left and right moving sheave portions on the duct support member. And a wire winding mechanism section having a winding drum that is driven to rotate by a drive motor. The winding wire has both ends locked to the left and right lifting frames, respectively, and continues to the both ends. left,
The middle part on the right is wound from the left constant pulley part to the left moving pulley part and from the right constant pulley part to the right moving pulley part, respectively, and the middle part is wound on the winding drum of the wire winding mechanism part. A duct installation hoisting device configured as described above.