JP2020125888A - Lifting device - Google Patents

Abstract

To provide a lifting device easy in assembling, having high safety to separation of a wire and the like, and capable of stabilizing an attitude in a state that a suction grille is suspended by the wire.SOLUTION: A lifting device includes: a pair of winding drums 12 mounted at a main body side of an air conditioner; a pair of wires 20 respectively connected to the winding drum 12 at one end to be wound, and connected to a connection member 25 at the other end to be connected; a connection metal fitting 30 suspended by the wires 20 and supporting a suction grille; a pair of pulleys 40 respectively rotatably supported by a pair of parallel pulley shafts 41 disposed on the connection metal fitting 30 to hang the wires 20; and a stopper portion 33 fixed to the connection metal fitting 30 between the pair of pulleys 40, and kept into contact with the connection member 25 to restrict movement of the wire 20. Thus the suction grille is suspended by two short wires 20, and productivity of the lifting device 2 can be improved while securing safety by suppressing separation of the wires 20 and inclination of the suction grille.SELECTED DRAWING: Figure 4

Description

The present invention relates to an elevating device that is provided in an indoor unit or the like of an air conditioner installed on a ceiling and that moves up and down a suction grill of the indoor unit or the like.

Indoor air suction chambers for duct type air conditioning systems, indoor air suction chambers for ventilation systems, indoor units for refrigerant piping type air conditioning systems, such as ceiling embedded type that is embedded in the ceiling or ceiling suspended type that is suspended from the ceiling. Etc. Conventionally, in this type of indoor unit or the like, there is known an indoor unit or the like in which a suction grill or a panel in which a filter is arranged is hung by a wire or the like and is vertically movable.

For example, Patent Document 1 discloses an elevating device that elevates and lowers a suction grill of an air conditioner installed above a room. The elevating device of the document is constructed by a pair of take-up drums provided on the main body side of the air conditioner, one end of which is connected to one take-up drum and the other end of which is connected to the other take-up drum. It has a wire to be wound up and a connecting fitting that is suspended by the wire and connected to the suction grill. With such a configuration, in the lifting device, the suction grill is pulled by the wire wound around the pair of take-up drums to move up and down.

Further, the connection fitting of the document is provided with a pair of pulleys around which a wire is wound. With such a configuration, the wire is movably supported by the pulley having a small rolling resistance, so that the suction grill easily moves relative to the wire and easily returns to the horizontal state even when slightly tilted. This stabilizes the posture of the suction grill and keeps the suction grill substantially horizontal.

Still further, the lifting device of the same document has a pair of stopper portions in which wires are inserted between a pair of pulleys, and a pair of retaining members that are fixed to the wires between the pair of stopper portions and cannot pass through the stopper portions. Have. With such a configuration, the inclination of the suction grill is regulated by the contact of the retaining member with the stopper portion, and the suction grill easily returns to the substantially horizontal state.

JP, 2017-161136, A

According to the above-mentioned conventional technique, the inclination of the suction grill can be regulated, and the suction grill can be raised and lowered substantially horizontally. However, the above-mentioned conventional technique has a point to be improved from the viewpoint of improving the productivity of the lifting device while maintaining the safe lifting performance for suppressing the inclination of the suction grill.

Specifically, in the configuration in which the suction grill is suspended by one continuous wire as in the above-described conventional technique, a long wire is required, and it is not easy to produce the wire and assemble it to the lifting device. .. Therefore, it has been desired to improve the productivity of the wire while ensuring the safety of lifting and lowering, and to easily assemble the wire into the lifting device.

Further, in the conventional lifting device, when the suction grill is pulled out to the longest position of the wire such as near the floor surface and the winding drum is locked, even if the wire is pulled, the winding drum is unlocked. There was a problem that it could not be done. Therefore, when the lock cannot be released in this way, it is necessary for the worker to remove the case of the take-up drum and manually rotate the clutch mechanism to release the lock. It was

The present invention has been made in view of the above circumstances, and an object thereof is easy assembly, high safety against detachment of a wire, and a state in which a suction grill is hung on the wire. An object of the present invention is to provide an elevating device capable of suppressing the inclination of the suction grill and stabilizing its posture.

An elevating device of the present invention is an elevating device that is provided in an air conditioner installed above a room to elevate and lower a suction grill of the air conditioner, and includes a pair of devices provided on a main body side of the air conditioner. A take-up drum, a pair of wires having one end connected to the take-up drum and wound up, and the other end connected to a connecting member, and a connecting fitting for suspending the wire to support the suction grille. A pair of pulleys each rotatably supported by a pair of parallel shafts provided on the connecting fitting and on which the wire is hung, and fixed to the connecting fitting between the pair of pulleys and contacting the connecting member. And a stopper portion that contacts and limits the movement of the wire.

According to the lifting device of the present invention, the pair of winding drums provided on the main body side of the air conditioner, the pair of one end connected to the winding drum and wound up, and the other end connected to the connecting member to be connected. Wire and a connecting fitting that is hung by the wire and supports the suction grill. With such a configuration, since the suction grill is suspended by the two wires connected by the connecting member, it is possible to use a short wire without using a long wire unlike the above-described conventional technique. Therefore, the productivity of the wire is improved.

Furthermore, the lifting device of the present invention has a pair of pulleys, each of which is rotatably supported by a pair of parallel shafts provided on the connection fitting and on which a wire is wound. With such a configuration, the suction grille is likely to move relative to the wire and easily return to a horizontal state even if slightly inclined. This stabilizes the posture of the suction grill and keeps the suction grill substantially horizontal.

Furthermore, the lifting device of the present invention has a stopper portion that is fixed to the connecting fitting between the pair of pulleys and contacts the connecting member to limit the movement of the wire. With such a configuration, it is possible to prevent the suction grill from being largely inclined by one stopper portion, and the suction grill can easily return to a substantially horizontal state. Therefore, it is possible to facilitate the work of attaching the stopper portion while ensuring the safety of suppressing the inclination of the suction grill.

Further, even if one wire is cut for some reason, the other wire that is not cut is connected to the connecting member whose movement is restricted by the stopper portion and can support the suction grill. Maintained in a state. Therefore, even if one wire is cut, the other wire can prevent the suction grill from falling.

Further, according to the lifting device of the present invention, there is a cover member that is attached to the connection fitting and covers the connecting member between the pair of pulleys and the wire, and the connecting member has a stopper hole through which the stopper portion is inserted. However, the connection fitting and the cover member may be fixed by a stopper portion inserted through the stopper hole. With such a structure, the inclination of the suction grille can be suppressed and the connection fitting and the cover member can be fixed by assembling one stopper portion. Therefore, a lifting device that is easy to assemble and has excellent safety can be obtained.

Further, according to the lifting device of the present invention, the wire has a ring portion that is folded back, crimped and fixed by the sleeve, and hooked to the pin portion provided on the connection fitting, and the wire has an end near the sleeve. A knot may be formed on the part side. Accordingly, even when the wire is strongly pulled due to a large impact or the like, it is possible to prevent the knot from coming into contact with the end portion of the sleeve and sliding the wire inside the sleeve to be pulled out.

Further, according to the lifting device of the present invention, the wire may be formed such that the length of one wire wound around the winding drum is longer than that of the other wire. As a result, for example, even when the suction grill is pulled down to the vicinity of the floor surface and one wire is pulled out to the longest position and the winding drum cannot be unlocked, the other wire is pulled. With this, the winding drum can be rotated to release the lock. That is, the work of removing the case of the winding drum and manually rotating the clutch mechanism is not required, and the unlocking work becomes easier than the conventional lifting device.

Further, according to the lifting device of the present invention, the connection fitting is fixed to the upper surface of the grill supporting member that supports the suction grill, and the grill supporting member is located outside both ends of the shaft of the pulley and below the peripheral surface of the shaft. The high side surface portion may be formed. With this configuration, the side surface portion can prevent the shaft of the pulley from coming off. Therefore, it is possible to prevent the pulley from coming off and enhance the safety of the lifting device without making the assembling work of the lifting device difficult.

It is a perspective view of an air conditioner provided with a lifting device according to an embodiment of the present invention. It is an exploded perspective view of an air conditioner concerning an embodiment of the present invention. It is a perspective view of the suction grille which concerns on embodiment of this invention. It is a figure which shows schematic structure of the raising/lowering apparatus which concerns on embodiment of this invention, FIG.4(A) is a partial cross section front view, FIG.4(B) is a top view of a connection metal fitting vicinity. It is a top view which shows schematic structure of the connection member vicinity of the raising/lowering apparatus which concerns on embodiment of this invention. It is an exploded perspective view showing a schematic structure of a connecting metal fitting near a connecting member of a lifting device concerning an embodiment of the present invention. It is a figure which shows schematic structure of the pulley vicinity of the raising/lowering apparatus which concerns on embodiment of this invention, FIG.7(A) is the sectional view on the AA line shown in FIG.4(B), FIG.7(B) is a disassembled perspective view. Is. 9A and 9B are views showing the attachment of the connection fittings of the lifting device according to the embodiment of the present invention, FIG. 8A is a perspective view showing a state where the connection fittings are placed on the grill support member, and FIG. 8A is an enlarged perspective view of the vicinity of the B portion shown in FIG. 8A, FIG. 8C is an enlarged perspective view of the vicinity of the B portion showing the attachment of the fall prevention member, and FIG. 8D is an enlarged view of the vicinity of the B portion showing the attachment of the nut. It is a perspective view. It is a side sectional view showing attachment of a connecting metal fitting of a lifting device concerning an embodiment of the present invention.

Hereinafter, a lifting device according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of an air conditioner 1 including an elevating device 2 according to an embodiment of the present invention as seen obliquely from below, and shows a state in which a suction grill 5 provided so as to be elevatable is pulled out.

As shown in FIG. 1, an air conditioner 1 is an indoor unit of a duct type air conditioning system used for ventilation, heating, cooling, and the like in a room, and is an indoor air suction device that takes in indoor air into an air conditioner. .. In addition to the air conditioner 1 which is an indoor air suction device, the air conditioner according to the present embodiment connects not-shown air blowing devices, heat exchangers, blowers, branch chambers, dampers, and each device to flow air. It has a duct, etc. The air conditioner using the lifting device 2 of the present embodiment may be a ventilator for performing only ventilation, a refrigerant piping type air conditioner, or the like.

The suction chamber 3, which is the main body of the air conditioner 1, is embedded in the ceiling or the like, and has a suction port 9 that opens to the indoor side and a duct connection portion to which a duct or the like (not shown) is connected. The suction port 9 is an opening for taking in air from the room, and the suction port 9 is provided with a suction grill 5 that is openable and closable in a substantially lattice shape. The suction grill 5 is made of, for example, an integrally molded product of synthetic resin, an extruded material such as aluminum or a sheet metal processed material such as a steel plate.

The duct connecting portion of the suction chamber 3 has a substantially circular through hole and a substantially cylindrical connecting portion continuous from the peripheral edge thereof, and the above-mentioned duct or the like is connected to the connecting portion. The air in the room taken into the suction chamber 3 is sent to another device (not shown) via a duct or the like.

The hoisting device 10 of the lifting device 2 is disposed on the main body side of the air conditioner 1 that is embedded in the ceiling or the like. The suction grill 5 of the air conditioner 1 is suspended from the main body side of the air conditioner 1 by a wire 20 connected to the hoisting device 10, and is configured to be movable up and down. The air conditioner 1 may be a ceiling suspension type that is suspended from the ceiling or the like and installed in the upper part of the room.

FIG. 2 is an exploded perspective view of the air conditioner 1, and is a perspective view of the suction chamber 3 and the frame 47 as viewed obliquely from below and the intake grill 5 as viewed obliquely from above.
As shown in FIG. 2, the suction chamber 3 has a substantially box-like shape in which an opening serving as a suction port 9 is formed, and the suction port 9 faces the indoor side, that is, faces downward. It is arranged inside or near the ceiling.

A substantially rectangular frame-shaped frame 47 is attached to the suction port 9 of the suction chamber 3. A base plate 48 is provided substantially in the center of the frame 47 so as to extend across a pair of opposite sides of the frame 47. Then, the hoisting device 10 of the elevating device 2 is attached above the base plate 48.

A pair of wires 20 are connected to the hoisting device 10 so that they can be pulled out and hoisted up, and a connection fitting 30 is suspended by the wires 20. The connection fitting 30 is detachably fixed to the grill support member 50 that supports the suction grill 5, whereby the suction grill 5 is connected to the wire 20 through the connection fitting 30 and is suspended by the wire 20. It

The frame 47 may be provided with a magnet 49 that attracts and holds the suction grill 5 or its supporting member by magnetic force. As a result, the work of storing the suction grill 5 is facilitated, and the suction grill 5 can be stored accurately at a predetermined storage position with a small gap or the like in close contact.

FIG. 3 is a perspective view of the suction grill 5 seen from diagonally above. As shown in FIG. 3, a filter 55 is detachably attached to the suction grill 5. Specifically, the suction grill 5 or a supporting member thereof is provided with a pair of rails 54 that removably support the filter 55, and the filter 55 is inserted along the rails 54. The rail 54 is made of, for example, an extruded material such as aluminum or a sheet metal processed material such as a steel plate.

The filter 55 is, for example, an air filter having a substantially rectangular filter frame 56 formed by bending a steel rod and the like, and a synthetic fiber nonwoven fabric stretched between the filter frames 56. By attaching the filter 55 to the suction grille 5, dust or the like can be attached to the surface of the filter 55 to prevent the dust or the like from being sucked into the air conditioner 1.

As described above, the filter 55 is detachably attached to the suction grill 5 configured to be movable up and down. As a result, the suction grill 5 can be pulled down from the air conditioner 1 installed near the ceiling, and the filter 55 can be easily removed for cleaning and replacement.

FIG. 4A is a partial cross-sectional front view showing a schematic configuration of the lifting device 2, and FIG. 4B is a plan view showing a schematic configuration near the connection fitting 30. In addition, in FIG. 4(A), the vicinity of the connection fitting 30 shows a cross section taken along the line AA shown in FIG. 4(B).

As shown in FIG. 4A, the hoisting device 10 of the lifting device 2 is disposed inside the case 17 above the base plate 48, and is connected to the pair of take-up drums 12 and the take-up drum 12. And a spring mechanism 13. The pair of winding drums 12 and the spring mechanism 13 are connected by a drive shaft 11 rotatably supported by a support member 15 and a support member 16. The support members 15 and 16 are, for example, members formed by bending a steel plate or the like into a substantially L shape.

The winding drum 12 winds up the wire 20, and the spring mechanism 13 is a drive unit that rotates the winding drum 12 to wind up the wire 20. The spring mechanism 13 is, for example, a constant force spring or the like that is composed of a leaf spring or the like whose upper and lower ends are rotatably fixed to an upper winding shaft and a lower winding shaft and wound. An electric motor or the like may be adopted as the drive means for rotating the winding drum 12.

A clutch mechanism 14 that restricts rotation of the winding drum 12 in the winding direction with the wire 20 being pulled out is connected to the drive shaft 11. By providing the clutch mechanism 14, the suction grill 5 (see FIG. 1) can be stopped in a lowered state, and replacement work of the filter 55 (see FIG. 3) and other inspection work can be easily performed. it can. When the winding rotation of the take-up drum 12 is restricted by the clutch mechanism 14, the wire 20 is further pulled out to release the restriction of the clutch mechanism 14. As a result, the winding of the wire 20 by the winding drum 12 is allowed.

A pair of wires 20 are connected to the winding drum 12. Specifically, one end of one wire 20A is connected to one winding drum 12A, and one end of the other wire 20B is connected to the other winding drum 12B. The other end of each of the one wire 20A and the other wire 20B, that is, the lower end side thereof, is connected to the connecting member 25.

The wire 20 may be formed such that one wire 20A is wound around the winding drum 12A longer than the other wire 20B. On the contrary, the wire 20B may be formed to be longer than the wire 20A.

With such a configuration using the pair of wires 20A and 20B having different lengths, for example, the suction grill 5 is pulled down to the vicinity of the floor surface, and one wire 20A or wire 20B is pulled out to the longest position to take up the winding drum 12. Even if the lock cannot be released, the other drum 20A or wire 20B can be pulled to rotate the winding drum 12 to release the lock. That is, the work of removing the case 17 of the take-up drum 12 and manually rotating the clutch mechanism 14 for unlocking is unnecessary, and the unlocking work becomes easier as compared with the conventional lifting device. ..

As shown in FIGS. 4A and 4B, the pair of wires 20 connected by the connecting member 25 is wound around a pair of pulleys 40 rotatably provided on the connection fitting 30. As a result, the connection fitting 30 is suspended by the pair of wires 20.

In this way, in the lifting device 2, since the suction grill 5 is suspended by the two wires 20A and 20B connected by the connecting member 25, it is not necessary to use one long wire unlike the prior art. Short wires 20 can be used. As a result, the wire 20 has high productivity and is easy to handle and assemble during transportation, so that the productivity of the lifting device 2 is improved.

As the wire 20, for example, a cord-shaped body made of high-strength polyarylate fiber or polyamide fiber may be used. By using the high-strength polyarylate fiber as the wire 20, the diameter of the wire 20 can be suppressed to be small while ensuring a predetermined withstand load. As a result, the difference in the winding length due to the change in the winding diameter of the left and right winding drums 12A and 12B can be reduced.

It is also possible to use a plurality of wires 20 in parallel. For example, the wires 20A and 20B may be formed by bundling a plurality of wires 20. By doing so, even if one wire 20 is cut for some reason, the remaining wire 20 can support the suction grill 5 and the safety against falling of the suction grill 5 is further enhanced.

The connection fitting 30 is formed by bending a steel plate, for example, has a substantially U-shaped cross section, and extends substantially parallel to the drive shaft 11. The above-mentioned pulley 40 is provided in the vicinity of both ends of the connection fitting 30 so that one ends of the wires 20A and 20B are substantially parallel when the connection fitting 30 is suspended. That is, the arrangement interval of the pair of winding drums 12 and the arrangement interval of the pair of pulleys 40 are substantially equal. This makes it possible to minimize the tension applied by arranging the wire 20 substantially vertically, prevent the wire 20 from coming off the winding drum, and appropriately support the load of the suction grill 5.

Further, as shown in FIG. 4B, screw portions 53 of the grill support member 50, which will be described later, are provided in the vicinity of both ends of the connection fixture 30 when the connection fixture 30 is fixed to the grill support member 50 (see FIG. 2). A fixing hole 32 that is fitted into the fixing hole 32 (see FIG. 8) is formed.

FIG. 5 is a plan view showing a schematic configuration in the vicinity of the connecting member 25. FIG. 6 is an exploded perspective view showing a schematic configuration of the connecting fitting 30 near the connecting member 25.
As shown in FIGS. 5 and 6, the pair of wires 20</b>A and 20</b>B are connected by the connecting member 25. Specifically, the connecting member 25 is formed in a substantially U-shaped cross section, and a pair of pin portions 28 are inserted substantially parallel to and supported by a support hole 26 formed in the side surface portion. The wire 20 is supported by the ring portion 21 formed at the end thereof being hooked on the pin portion 28 inserted into the support hole 26 of the side surface portion of the connecting member 25.

The connecting member 25 connecting the pair of wires 20 is formed with a stopper hole 27 into which a stopper portion 33 is inserted near the center of the bottom surface thereof. A substantially steel rod-shaped stopper portion 33 that is inserted into the stopper hole 27 of the connecting member 25 is formed in the connection fitting 30 near the center of the bottom surface thereof.

When the suction grill 5 (see FIG. 2) tilts and the connecting member 25 that connects the wire 20 moves by a predetermined distance, the end of the stopper hole 27 of the connecting member 25 contacts the stopper portion 33. This limits the movement of the connecting member 25. Therefore, the movement of the wire 20 is restricted, and the inclination of the suction grill 5 is suppressed.

As described above, in the lifting device 2, the single stopper portion 33 fixed to the connection fitting 30 prevents the suction grill 5 from being largely tilted, and the suction grill 5 is likely to return to the substantially horizontal state. Therefore, the attachment work of the stopper portion 33 can be easily performed, and the safety of suppressing the inclination of the suction grill 5 can be ensured.

Even if one of the wires 20A or 20B is cut for some reason, the other uncut wire 20 is connected to the connecting member 25 whose movement is restricted by the stopper portion 33. And the suction grill 5 is maintained in a state of being supported. Therefore, even if one of the wires 20A or 20B is cut, the other wire 20 can prevent the suction grill 5 from dropping.

Further, as described above, the ring portion 21 that is hooked by the pin portion 28 supported by the connection fitting 30 is formed near the end portion of the wire 20. The ring portion 21 is formed in a substantially annular shape so that the vicinity of the end portion of the wire 20 is folded back, and the vicinity of the end portion of the wire 20 on which the ring portion 21 is formed is inserted into the sleeve 23 and fixed by caulking. There is. That is, the vicinity of the end of the wire 20 is inserted into the sleeve 23, folded back to form the ring portion 21, inserted into the sleeve 23 again, and crimped by the sleeve 23.

Then, a knot 22 for stopping and knotting the wire 20 is formed on the end side of the wire 20 fixed to the sleeve 23. This prevents the knot 22 from coming into contact with the end of the sleeve 23 and slipping the wire 20 inside the sleeve 23 even when the wire 20 is strongly pulled due to a large impact or the like. be able to.

Referring to FIG. 6, the connecting member 30 to which the connecting member 25 and the wire 20 are attached is a cover member having a substantially U-shaped cross section formed by bending a steel plate or the like so as to cover the connecting member 25 and the wire 20. 38 is attached.

Specifically, a sleeve 34 formed of a steel pipe or the like is fitted into the stopper portion 33 provided on the connection fitting 30. Then, the connecting member 25 is attached so that the stopper portion 33 is inserted into the stopper hole 27. Next, the cover member 38 is attached so that the stopper portion 33 fits into the support hole 39 formed substantially in the center of the upper surface portion of the cover member 38, and the cover member 38 is fixed by the nut 35.

Thus, the connecting member 25 is formed with the stopper hole 27 through which the stopper portion 33 is inserted, and the connection fitting 30 and the cover member 38 are fixed by the stopper portion 33 inserted through the stopper hole 27. .. With such a configuration, the inclination of the suction grill 5 can be suppressed and the connection fitting 30 and the cover member 38 can be fixed by assembling one stopper portion 33. Therefore, the lifting device 2 that is easy to assemble and has excellent safety can be obtained.

FIG. 7A is a cross-sectional view taken along the line AA shown in FIG. 4B and shows the vicinity of the pulley 40 of the lifting device 2 in an enlarged manner. FIG. 7B is an exploded perspective view showing the vicinity of the pulley 40 in an enlarged manner.
As shown in FIGS. 7A and 7B, the pair of pulleys 40 are provided in the vicinity of both ends of the connection fitting 30, and are rotatably supported by the pair of pulley shafts 41 that are parallel to each other. The pulley shaft 41 is supported by supporting pieces 31 formed by bending from both side portions of the connection fitting 30.

Specifically, for example, a spacer 37 formed by bending a steel plate or the like and having a substantially U-shaped cross section is attached to the connection fitting 30. The spacer 37 is placed inside the support piece 31 such that both side surface portions thereof are substantially parallel to the support piece 31 of the connection fitting 30 with the bottom surface portion at the center facing down. The pulley shaft 41 is inserted through the support hole formed in the support piece 31, the support hole formed in the spacer 37, and the support hole of the pulley 40, and the spacer 42 is fitted in the vicinity of the end and stopped by the retaining ring 43. Has been.
The support piece 31 may be formed integrally with the connection fitting 30, or may be formed as a member separate from the connection fitting 30 and then joined to the connection fitting 30 by welding or the like.

Then, as described above, the wire 20 is wound around the pair of pulleys 40. Thereby, the wire 20 becomes movable with respect to the connection fitting 30. In other words, the connection fitting 30 is movably suspended with respect to the wire 20. As a result, even if there is a difference in the winding length on both ends of the wire 20, the connecting fitting 30 connected to the suction grill 5 (see FIG. 1) moves relative to the wire 20 and the inclination of the suction grill 5 is increased. Is fixed.

In particular, in this embodiment, the connection fitting 30 is suspended via the rotatable pulley 40. Therefore, the rolling resistance of the pulley 40 that movably supports the wire 20 is smaller than the sliding resistance of the guide means or the like that slidably supports the wire as in the prior art. Therefore, the suction grill 5 easily moves relative to the wire 20 and easily returns to the horizontal state even if it is slightly inclined. As a result, the posture of the suction grill 5 is stabilized, and the suction grill 5 is substantially horizontal not only when it is stored in the suction chamber 3 (see FIG. 1) but also when it is pulled down and hung. To be kept.

The elevating device 2 also has a pair of guide rollers 44 arranged adjacent to the pulley 40 on the outer side of the pulley 40, that is, on both end sides of the connection fitting 30, with a guide pin 45 parallel to the pulley shaft 41 as an axis. The guide roller 44 is rotatably supported by a guide pin 45 that is inserted into a support hole formed in the spacer 37.

With such a configuration, the wire 20 wound around the pulley 40 is sandwiched between the pulley 40 and the guide roller 44. This prevents the wire 20 from coming off the pulley 40 while the wire 20 can easily move with respect to the suction grill 5. Therefore, the safety against the detachment of the wire 20 is enhanced while suppressing the inclination of the suction grill 5.

Here, it is preferable that the guide pin 45 that serves as the shaft of the guide roller 44 and the pulley shaft 41 that serves as the shaft of the pulley 40 be set at substantially the same height. Accordingly, the movement resistance of the wire 20 does not increase, and the wire 20 can be prevented from coming off.

The pulley 40 and the guide roller 44 are preferably made of synthetic resin or the like, and particularly preferably made of synthetic resin material such as polyacetal having excellent self-lubricating property. This facilitates the movement of the connecting fitting 30 with respect to the wire 20 and enhances the function of correcting the inclination of the suction grill 5.

Next, a configuration for attaching the connecting fitting 30 of the lifting device 2 to the suction grill 5 and an attaching operation will be described in detail.
8A is a perspective view showing a state in which the connecting fitting 30 of the lifting device 2 is placed on the grill support member 50, and FIG. 8B is an enlarged view of the vicinity of the B portion shown in FIG. 8A. It is a perspective view. FIG. 8C is an enlarged perspective view of the vicinity of the B portion showing the attachment of the fall prevention member 57, and FIG. 8D is an enlarged perspective view of the vicinity of the B portion showing the attachment of the nut 59.

When the lifting device 2 is shipped as a product, parts such as the pulley 40 and the wire 20 are assembled in advance to the connection fitting 30. Further, the grill support member 50 is also assembled in advance to the suction grill 5 (see FIG. 2). Therefore, the work of attaching the suction grill 5 to the lifting device 2 described here is mainly performed at the site where the air conditioner 1 is installed.

As shown in FIGS. 8A and 8B, in order to connect the suction grill 5 to the elevating device 2, first, the connection fitting 30 is placed on the grill support member 50 supporting the suction grill 5. It At that time, the screw portion 53 protruding upward from the upper surface of the grill support member 50 is inserted into the fixing holes 32 formed near both ends of the connection fitting 30. Accordingly, the connection fitting 30 can be easily positioned and the connection fitting 30 can be arranged at a predetermined position.

Next, as shown in FIG. 8C, the fall prevention members 57 are attached near both ends of the connection fitting 30 placed on the grill support member 50. Specifically, the fall prevention member 57 is made of a steel plate or the like bent in a substantially U shape, and is attached such that the connection fitting 30 and the grill support member 50 are sandwiched from the penetrating portion 52 formed in the grill support member 50. To be done. The grill support member 50 is also a sheet metal part formed by bending a steel plate or the like, and has the penetrating portion 52 penetrating from the upper surface to the lower surface so that the fall prevention member 57 can be mounted as described above.

By attaching the drop-preventing member 57, the lower surface of the U-shaped bent upper piece of the drop-preventing member 57 abuts the upper surface of the connection fitting 30, and the lower piece of the drop-preventing member 57 bent in the U-shape. The upper surface of the grill abuts on the lower surface of the grill support member 50. As a result, the grill support member 50 is temporarily fixed to the connection fitting 30, and the connection fitting 30 can lift the grill support member 50 and the suction grill 5 connected thereto.

In addition, a cutout portion 58 into which the screw portion 53 is inserted is formed in the upper piece of the drop-out prevention member 57. When the fall prevention member 57 is attached, the screw portion 53 of the grill support member 50 is inserted into the cutout portion 58 of the fall prevention member 57. This facilitates the positioning of the fall prevention member 57.

Next, as shown in FIG. 8D, a nut 59 for fixing is screwed onto the screw portion 53 from above the fall prevention member 57, and the connection fitting 30 is supported on the grill by fastening the screw portion 53 and the nut 59. It is fixed to the member 50.

As described above, in the lifting device 2 according to the present embodiment, it is possible to easily perform the connecting work between the lifting device 2 and the suction grill 5 without performing the connecting work of the wire 20 or the like in the field. That is, by pulling out the wire 20 from the hoisting device 10 (see FIG. 4) and attaching the connecting metal fitting 30 previously connected to the wire 20 to the grill support member 50 supporting the suction grill 5, the suction grill 5 is fixed. It can be easily attached to the lifting device 2.

Since the fall prevention member 57 is provided, the work of attaching the suction grill 5 is easy in the lifting device 2, so that it is possible for only one operator to attach the suction grill 5. Specifically, the operator supports the suction grill 5 with one hand, mounts the connection fitting 30 on the grill support member 50 with the other hand, and then attaches the fall prevention member 57 with the other hand. it can. Then, after that, even if the one hand supporting the suction grill 5 is released, the suction grill 5 does not drop, so that the nut 59 can be tightened using both hands.

FIG. 9 is a side sectional view showing the outline of the attachment of the connecting fitting 30 of the lifting device 2.
As shown in FIG. 9, the connection fitting 30 is fixed to the upper surface of the grill support member 50 that supports the suction grill 5. The grille supporting member 50 has side surface portions 51 formed outside the both ends of the pulley shaft 41 of the pulley 40 and higher than the lower portion of the peripheral surface of the pulley shaft 41.

That is, the height L1 of the side surface portion 51 of the grill supporting member 50 is higher than the height L2 from the upper surface of the bottom surface portion of the grill supporting member 50 to the lower peripheral surface of the pulley shaft 41. With such a configuration, the side surface 51 of the grille supporting member 50 can prevent the pulley shaft 41 of the pulley 40 from coming off. Therefore, the pulley 4 can be prevented from coming off and the safety of the lifting device 2 can be enhanced without making the assembling work of the lifting device 2 difficult.

The present invention is not limited to the above embodiment. For example, in the above description, a configuration has been described in which the lifting device 2 having the pair of winding drums 12 is used to lift the suction grill 5 at two locations in the central portion of the suction grill 5, but yet another pair of winding drums. Twelve may be provided. That is, it is also possible to adopt a configuration in which the suction grilles 5 are lifted at two locations in the vicinity of the opposite sides of the suction grilles 5, a total of four locations. In addition, the present invention can be modified in various ways without departing from the scope of the present invention.

1 Air Conditioner 2 Lifting Device 3 Suction Chamber 5 Suction Grill 10 Hoisting Devices 12, 12A, 12B Winding Drum 13 Spring Mechanism 14 Clutch Mechanism 20 Wire 21 Ring Part 22 Knot 23 Sleeve 25 Coupling Member 26 Support Hole 27 Stopper Hole 28 Pin portion 30 Connection fitting 33 Stopper portion 40 Pulley 44 Guide roller 47 Frame 48 Base plate 50 Grill support member 55 Filter 51 Side surface portion 57 Fall-out prevention member

Claims (5)

An elevating device that is installed in an air conditioner installed above a room to elevate and lower a suction grill of the air conditioner,
A pair of winding drums provided on the main body side of the air conditioner,
A pair of wires, one end of which is connected to the winding drum and wound up, and the other end of which is connected to and connected to a connecting member;
A connection fitting that is suspended by the wire and supports the suction grill,
A pair of pulleys, each of which is rotatably supported by a pair of parallel shafts provided on the connection fitting and on which the wire is hung,
An elevating device, comprising: a stopper portion fixed to the connecting fitting between the pair of pulleys and abutting against the connecting member to limit movement of the wire. A cover member attached to the connection fitting to cover the connecting member and the wire between the pair of pulleys,
The connecting member has a stopper hole through which the stopper portion is inserted,
The lifting device according to claim 1, wherein the connection fitting and the cover member are fixed by the stopper portion that is inserted into the stopper hole. The wire has a ring portion that is folded back, crimped and fixed by a sleeve, and hooked to a pin portion provided on the connection fitting,
The lifting device according to claim 2, wherein the wire is formed with a knot on the end side near the sleeve. The wire is formed so that the length of one of the wires wound around the winding drum is longer than that of the other wire. The lifting device according to item 1. The connection fitting is fixed to an upper surface of a grill support member that supports the suction grill,
The side surface portion of the grill supporting member, which is higher than the lower portion of the peripheral surface of the shaft, is formed outside both ends of the shaft of the pulley. Lifting device described.

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