JP6609203B2 - lift device - Google Patents

Description

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

  In general, as an indoor air suction chamber of a duct type air conditioning system, an indoor air suction chamber of a ventilator, an indoor unit of a refrigerant pipe type air conditioning system, etc., there are a ceiling embedded type embedded in the ceiling or a ceiling suspended type suspended from the ceiling. is there. 2. Description of the Related Art Conventionally, in this type of indoor unit or the like, a suction grill or a panel on which a filter is disposed is suspended by a wire or the like so as to be movable up and down.

  For example, a ceiling-embedded air conditioner disclosed in Patent Document 1 includes a lifting mechanism unit having a lifting motor driven by a lifting motor on a unit body embedded in the ceiling. It has. A suction grill is detachably provided on the ceiling panel provided in the unit main body, and the suction grill is supported by a lifting mechanism unit so as to be lifted and lowered via a suspension wire.

  In the ceiling-embedded air conditioner of the same document, the suspension wires respectively fed from the take-up pulleys are slidably inserted into the suspension wire guide means, and the respective end portions can be detachably attached to each other by a one-touch type connection fitting. Connected to Since the suspension wire is slidably guided by the suspension wire guide means, the suction grille can be securely stored in the ceiling panel even if there is a difference in the winding length of the left and right suspension wires.

  Further, for example, Patent Document 2 discloses a ceiling-embedded air conditioner in which a center panel and a filter are integrated and can be moved up and down with respect to a decorative panel of a main body by a plurality of hanging ropes. Yes. The suspension rope of this document is slidably supported in contact with the rope receiving surface of a rope guide installed on the center panel, and the tips of the suspension ropes are detachably connected via springs. By extending the spring, the center panel is corrected to a horizontal state and stored in the decorative panel.

  Further, for example, in Patent Document 3, in a ceiling-embedded air conditioner having a mechanism for raising and lowering the suction grill, through holes are formed through the front and back surfaces of the suction grill, and are inserted through the through holes, respectively. It is described that the ends of the hanging straps are connected by a coupling tool. The connector has a diameter larger than the hole diameter of the through hole, so that even if one hanging string is cut, the suction grill can be supported by the remaining one hanging string.

JP 2000-161767 A JP 2002-61876 A JP 2004-150716 A

  In the above-described prior art, the suction grill or the like is provided so as to be movable with respect to a wire or the like that suspends the suction grill or the like. Therefore, even if there is a difference in the winding length between both ends of the wire, the suction grill moves with respect to the wire. Therefore, in the state where the suction grill is closed, the suction grill is corrected and becomes horizontal. .

  However, since the suction grille is movable with respect to the wire, there is a problem in that the suction grille moves with respect to the wire and is largely inclined in a state where the wire is drawn out and the suction grille is suspended. .

  In particular, in the configuration in which the wire for suspending the suction grille is slidably supported in contact with the guide means provided on the suction grille, the frictional resistance between the wire and the guide means etc. is relatively large, so it is inclined once. The suction grill is difficult to return to the horizontal state and tends to remain tilted.

  When the suction grill is wound up in a state where the suction grill is greatly inclined as described above, the suction grill becomes difficult to enter a predetermined storage position of the air conditioner body. In addition, if the suction grille is greatly inclined, there is a risk that a filter attached to the suction grille may be displaced, detached, or dropped, so it is not preferable that the suction grille is greatly inclined.

  In the above-described prior art, the ends of the wires and the like that suspend the suction grill and the like are connected to each other by a connector or the like. For this reason, it is not easy to connect the wire or the like to the connecting tool, and there is a problem that the wire or the like is disconnected from the connecting tool or the like if the connection is inappropriate.

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

  The lifting device of the present invention is a lifting device that is provided in an air conditioner installed above a room and moves up and down a suction grill of the air conditioner, and a pair of windings provided on the main body side of the air conditioner. A take-up drum, one end of which is connected to one of the take-up drums and the other end of which is connected to the other take-up drum and wound up by the take-up drum, and the suction grille suspended by the wires A connection fitting connected to the connection fitting, a pair of pulleys rotatably supported on a pair of parallel shafts provided on the connection fitting, and the connection fitting between the pair of pulleys. A pair of stopper portions formed so that the wire between the pair of pulleys is movably inserted in the extending direction; and the wire between the pair of stopper portions is fixed to the wire. Has a pair of retaining members which can not pass through the Tsu path portion, the inclination of the suction grille by the retaining member is brought into contact with the stopper portion, characterized in that it is regulated.

  According to the lifting device of the present invention, a pair of winding drums provided on the main body side of the air conditioner, one end is connected to one of the winding drums, and the other end is connected to the other winding drum. A wire wound up by the winding drum, and a connection fitting suspended from the wire and connected to the suction grille. Thus, in the present invention, the suction grill is suspended by a single continuous wire, rather than a configuration in which two wires are connected by a connector or the like as in the prior art described above. Therefore, it is not necessary to connect a wire and a coupling tool, the assembly of the lifting device is easy, and the connection between the lifting device and the suction grill is also easy. Moreover, since there is no connection part of a wire, a connection tool, etc., there is no fear that a wire will remove | deviate from such a connection part.

  Furthermore, the lifting device of the present invention has a pair of pulleys that are rotatably supported by a pair of parallel shafts provided on the connection fitting and on which the wire is wound. In such a configuration, the rolling resistance of the pulley that movably supports the wire is smaller than the sliding resistance of the guide means that slidably supports the wire as in the prior art. Therefore, the suction grille is easy to move relative to the wire, and even if it is slightly tilted, it is easy to return to the horizontal state. Thereby, the attitude | position of a suction grill is stabilized and a suction grill is kept substantially horizontal.

  Still further, the lifting device of the present invention is a pair of stopper portions formed in the connection fitting between the pair of pulleys, through which the wire between the pair of pulleys is movably inserted in the extending direction. And a pair of retaining members that are fixed to the wire between the pair of stopper portions and cannot pass through the stopper portion, and the suction grille is inclined by the contact of the retaining members with the stopper portion. Be regulated. Accordingly, the suction grill is prevented from being largely inclined, and the suction grill is easily returned to a substantially horizontal state.

  In addition, even if the wire is cut for some reason, the retaining member fixed to the uncut end portion of the wire cannot pass through the stopper member, so the uncut end The suction grille can be supported by the wire on the part side. Therefore, the suction grill can be prevented from falling even when the wire is broken.

  Further, according to the lifting device of the present invention, it has a pair of guide rollers that are arranged adjacent to each other in parallel with the pulley and are rotatably supported by the connection fitting, and are wound around the pulley. The wire is sandwiched between the pulley and the guide roller. Accordingly, the wire can be easily moved with respect to the suction grille, and the wire is prevented from being detached from the pulley, and the safety against disconnection of the wire and the like is enhanced while suppressing the inclination of the suction grille.

  According to the lifting device of the present invention, an elastic member sandwiched between the stopper portion and the retaining member may be interposed between the stopper portion and the retaining member. As a result, when the retaining member fixed to the wire with the suction grille tilted approaches the stopper portion, the force that pulls the stopper portion and the retaining member apart by the restoring force of the stopper member and the elastic member compressed by the retaining member. Act. As a result, the suction grille can easily return to the original substantially horizontal state, and the posture of the suction grille is stabilized.

  According to the lifting device of the present invention, the connection fitting may be detachably attached to the grill. Thereby, the connection work of the lifting device and the suction grille can be easily performed without performing the wire connection work or the like. That is, the suction grill can be easily attached to the lifting device by attaching the connection fitting to which the wire is connected in advance to the suction grill or its support fitting.

It is a perspective view of the air conditioner provided with the raising / lowering apparatus which concerns on embodiment of this invention. It is a disassembled perspective view of the air conditioner which concerns on embodiment of this invention. It is a perspective view of a suction grill concerning an embodiment of the present invention. It is a figure which shows schematic structure of the raising / lowering apparatus which concerns on embodiment of this invention, (A) is a partial cross section front view, (B) is a top view of a connection bracket vicinity. It is an enlarged view which shows the pulley vicinity of the raising / lowering apparatus which concerns on embodiment of this invention, (A) is the sectional view on the AA line shown to FIG. 4 (B), (B) is a perspective view. It is a figure which shows attachment of the connection metal fitting of the raising / lowering apparatus which concerns on embodiment of this invention, (A) is a perspective view which shows the state which mounted the connection metal fitting in the grille support member, (B) is B shown to (A). FIG. 4C is an enlarged perspective view of the vicinity of the portion B, FIG. 5C is an enlarged perspective view of the vicinity of the portion B showing attachment of the fall prevention member, and FIG.

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 equipped with 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 movable up and down is pulled out.

  As shown in FIG. 1, the air conditioner 1 is an indoor unit of a duct type air conditioning system used for indoor ventilation, heating, cooling, and the like, and is an indoor air suction device that takes indoor air into the air conditioner. . The air conditioner according to the present embodiment connects an air blowing device, a heat exchanger, a blower, a branch chamber, a damper, and each device (not shown) in addition to the air conditioner 1 that is an indoor air suction device to flow air. It has a duct etc. In addition, as an air conditioning apparatus using the raising / lowering apparatus 2 of this embodiment, the ventilation apparatus which performs only ventilation, a refrigerant | coolant piping type air conditioning apparatus, etc. may be sufficient.

  The suction chamber 3 serving as the main body of the air conditioner 1 is embedded in the interior of the ceiling or the like, and has a suction port 36 that opens indoors and a duct connection portion to which a duct or the like (not shown) is connected. The suction port 36 is an opening for taking in air from the room, and the suction grill 5 having a substantially lattice shape or the like is provided in the suction port 36 so as to be freely opened and closed. 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-described duct and the like are connected to the connecting portion. The indoor air taken into the suction chamber 3 is sent to another device (not shown) via a duct or the like.

  A hoisting device 10 of the lifting device 2 is disposed on the main body side of the air conditioner 1 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 suspended type that is suspended from a ceiling or the like and installed at 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 37 as viewed from obliquely below, and the suction grille 5 as viewed from obliquely 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 36 is formed, and the suction port 36 faces the indoor side, that is, faces downward. Arranged in or near the ceiling or the like.

  A frame 37 having a substantially rectangular frame shape is attached to the suction port 36 of the suction chamber 3. A base plate 38 is provided at substantially the center of the frame 37 so as to straddle a pair of opposite sides of the frame 37. Then, the hoisting device 10 of the lifting device 2 is attached above the base plate 38.

  A wire 20 is connected to the hoisting device 10 so that it can be pulled out and wound up, and the connection fitting 30 is suspended by the wire 20. The connection fitting 30 is detachably fixed to the grill support member 40 that supports the suction grill 5, whereby the suction grill 5 is connected to the wire 20 via the connection fitting 30 and is suspended by the wire 20. The

  The frame 37 may be provided with a magnet 39 that attracts and holds the suction grill 5 or its support member by magnetic force. As a result, the storage work of the suction grille 5 is facilitated, and the suction grille 5 can be stored in close contact with a predetermined storage position accurately with a small gap or the like.

  FIG. 3 is a perspective view of the suction grille 5 as viewed obliquely from above. As shown in FIG. 3, a filter 45 is detachably attached to the suction grill 5. Specifically, the suction grill 5 or a support member thereof is provided with a pair of rails 43 that removably support the filter 45, and the filter 45 is inserted along the rail 43. In addition, the rail 43 is comprised from sheet metal processing materials, such as extrusion materials, such as aluminum, and a steel plate, for example.

  The filter 45 is, for example, an air filter having a substantially rectangular filter frame 46 bent from a steel rod or the like and a synthetic fiber nonwoven fabric stretched between the filter frames 46. By attaching the filter 45 to the suction grill 5, it is possible to prevent dust and the like from being sucked into the air conditioner 1 by attaching dust and the like to the surface of the filter 45.

  As described above, the filter 45 is detachably attached to the suction grill 5 configured to be movable up and down. Thereby, the suction grill 5 can be pulled down from the air conditioner 1 installed in the vicinity of the ceiling, and the filter 45 can be easily removed for cleaning, replacement, or the like.

  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 in the vicinity of the connection fitting 30. FIG. In FIG. 4A, the vicinity of the connection fitting 30 represents a cross section taken along line AA shown in FIG.

  As shown in FIG. 4A, the hoisting device 10 of the elevating device 2 is disposed inside the case 17 above the base plate 38 and is connected to the pair of winding drums 12 and the winding 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 that is rotatably supported by a support member 15 and a support member 16. In addition, the support members 15 and 16 are members formed by bending a substantially L shape or the like from a steel plate or the like, for example.

  The winding drum 12 winds the wire 20, and the spring mechanism 13 is a driving unit that rotates the winding drum 12 to wind the wire 20. The spring mechanism 13 is, for example, a constant load spring composed of a leaf spring or the like in which upper and lower ends are fixedly wound around an upper winding shaft and a lower winding shaft. Note that an electric motor or the like may be employed as the driving means for rotating the winding drum 12.

  A clutch mechanism 14 is connected to the drive shaft 11 to restrict the rotation of the winding drum 12 in the winding direction with the wire 20 being pulled out. By providing the clutch mechanism 14, the suction grille 5 (see FIG. 1) can be lowered and the filter 45 (see FIG. 3) can be replaced, and other inspection work can be easily performed. it can. In the state where the winding rotation of the winding drum 12 is restricted by the clutch mechanism 14, the restriction of the clutch mechanism 14 is released by further pulling out the wire 20. Thereby, winding of the wire 20 by the winding drum 12 is permitted.

  A wire 20 is connected to the winding drum 12. Specifically, the wire 20 has one end connected to one winding drum 12A and the other end connected to the other winding drum 12B. Then, as shown in FIGS. 4A and 4B, the wire 20 is wound around a pair of pulleys 25 that are rotatably provided on the connection fitting 30, whereby the connection fitting 30 is suspended by the wire 20. Will be lowered.

  As described above, in the present invention, the suction grill 5 is suspended by a single continuous wire 20 instead of a configuration in which two wires are connected by a connector or the like as in the prior art. Therefore, it is not necessary to connect a wire and a coupling tool or the like as in the prior art, the assembling of the lifting device 2 is easy, and the lifting device 2 and the suction grill 5 are also easily connected. Moreover, since there is no connection part of a wire and a connection tool etc. like a prior art, there is no fear that the wire 20 will remove | deviate from such a connection part.

  In addition, as the wire 20, the string-like body which consists of a high strength polyarylate fiber, a polyamide fiber, etc. is used, for example. By using a high-strength polyarylate fiber as the wire 20, the diameter of the wire 20 can be kept small while ensuring a predetermined load resistance. Thereby, the difference of the winding length by the change of the winding diameter in right and left winding drum 12A, 12B etc. can be restrained small.

  It is also possible to use a plurality of wires 20 in parallel. By doing so, even if one wire 20 is cut for some reason, the suction grill 5 can be supported by the remaining wire 20. Even when a plurality of wires 20 are used, each wire 20 has one end connected to one winding drum 12A and the other end connected to the other winding drum 12B. That is, each wire 20 is continuous from one winding drum 12A to the other winding drum 12B without a connecting portion or the like provided in the middle.

  For example, the connection fitting 30 is bent from a steel plate or the like, has a substantially U-shaped cross section, and extends substantially parallel to the drive shaft 11. The pulley 25 described above is provided in the vicinity of both ends of the connection fitting 30 so that both ends of the wire 20 are substantially parallel when the connection fitting 30 is suspended. That is, the arrangement interval between the pair of winding drums 12 and the arrangement interval between the pair of pulleys 25 are substantially equal. Thereby, the tension acting on the wire 20 can be minimized, the wire 20 can be prevented from being detached from the winding drum, and the load of the suction grill 5 can be suitably supported.

  Further, as shown in FIG. 4B, in the vicinity of both ends of the connection fitting 30, when the connection fitting 30 is fixed to the grill support member 40 (see FIG. 2), a thread portion 41 described later of the grill support member 40 will be described. A fixing hole 34 to be fitted into (see FIG. 6) is formed.

FIG. 5A is a cross-sectional view taken along the line AA shown in FIG. 4B, and shows the vicinity of the pulley 25 of the lifting device 2 in an enlarged manner. FIG. 5B is an enlarged perspective view showing the vicinity of the pulley 25.
As shown in FIGS. 5A and 5B, the pulley 25 is provided in the vicinity of both ends of the connection fitting 30 and is rotatably supported by a pair of pulley shafts 26 parallel to each other. The pulley shaft 26 is supported by a support piece 33 that is bent from the connection fitting 30. The support piece 33 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.

  As described above, the wire 20 is wound around the pair of pulleys 25. Thereby, the wire 20 becomes movable with respect to the connection fitting 30. In other words, the connection fitting 30 is suspended so as to be movable with respect to the wire 20. Thereby, even if a difference in winding length occurs between both ends of the wire 20, the connection fitting 30 connected to the suction grill 5 (see FIG. 1) moves relative to the wire 20, and the suction grill 5 is inclined. Is fixed.

  In particular, in this embodiment, the connection fitting 30 is suspended via the rotatable pulley 25. Therefore, the rolling resistance of the pulley 25 that movably supports the wire 20 is smaller than the sliding resistance of the guide means that slidably supports the wire as in the prior art. Therefore, the suction grill 5 is easy to move relative to the wire 20, and even if it is slightly inclined, it is easy to return to the horizontal state. Thereby, the posture of the suction grill 5 is stabilized, and the suction grill 5 is kept substantially horizontal not only in the state of being housed in the suction chamber 3 but also in the state of being pulled out and suspended.

  Further, the connection fitting 30 between the pair of pulleys 25 is formed with a pair of stopper portions 31 into which the wire 20 between the pair of pulleys 25 is movably inserted in the extending direction. The stopper portion 31 may be integrally bent from the connection fitting 30 or may be separately bent from a steel plate or the like into a substantially L shape or the like and joined to the connection fitting 30 by welding or the like.

  The stopper portion 31 is formed with a through-hole 32 that is a hole or a notch through which the wire 20 is inserted, and a substantially cylindrical guide sleeve 35 formed of synthetic resin or the like is fitted into the through-hole 32. Then, the wire 20 is movably inserted into the guide sleeve 35. By inserting the wire 20 into the through hole 32 of the stopper portion 31 via the guide sleeve 35, damage to the wire 20 due to friction between the stopper portion 31 of the wire 20 and the wire 20 can be prevented.

  A pair of retaining members 22 having a shape that cannot pass through the stopper portion 31 are fixed to the wire 20 between the pair of stopper portions 31. The retaining member 22 is, for example, a substantially cylindrical member made of aluminum or the like. After the wire 20 is inserted through the inner diameter portion thereof, the retaining member 22 is crushed and fixed to the wire 20 by caulking or the like. The retaining member 22 only needs to be configured so that the portion where the retaining member 22 of the wire 20 is fixed cannot pass through the stopper portion 31. In addition to the above example, the retaining member 22 may be a member fixed to the wire 20 with a screw or the like. good.

  As described above, when the stopper portion 31 is provided and the retaining member 22 is attached to the wire 20, the retaining member 22 contacts the guide sleeve 35 of the stopper portion 31 when the suction grill 5 is largely inclined. Thereby, the inclination of the suction grille 5 is regulated and the suction grille 5 is prevented from being greatly inclined. Moreover, since the suction grille 5 does not largely tilt, the suction grille 5 tends to return to a substantially horizontal state.

  Even if the wire 20 is cut for some reason, the retaining member 22 fixed to the uncut end portion of the wire 20 cannot pass through the stopper portion 31, so that The suction grille 5 can be supported by the end-side wire 20 that is not provided. Therefore, the suction grill 5 can be prevented from dropping even when the wire 20 is broken.

  As described above, when a plurality of wires 20 are used in parallel, the safety against the fall of the suction grill 5 is further enhanced. When using a plurality of wires 20, the plurality of wires 20 may be bundled and the retaining member 22 may be fixed to the bundled wires 20.

  Here, the distance L1 between the end portion of the retaining member 22 shown in FIG. 5A and the end portion of the guide sleeve 35 opposed to the end portion is appropriately set according to the difference in the winding length at both ends of the wire 20. The Specifically, the distance L1 is set to be larger than ½ of the assumed difference in the winding length of the wire 20. If the distance L1 is smaller than ½ of the difference in the winding length of the wire 20, the movement of the retaining member 22 is limited by the stopper portion, and the difference in the winding length of the wire 20 cannot be absorbed, and the suction grill 5 Cannot be returned horizontally.

  On the other hand, if the distance L1 between the retaining member 22 and the guide sleeve 35 is too large, a large inclination of the suction grill 5 is allowed, which is not preferable. Considering the above, for example, for a lifting distance of 2 m, the distance L1 between the retaining member 22 and the guide sleeve 35 is set to 5 to 100 mm, preferably 10 to 50 mm.

  In addition to the function of regulating the inclination of the suction grille 5 and the function of preventing the suction grille 5 from falling, the stopper portion 31 guides the wire 20 and the wire 20 comes off the pulley 25. It has a function to prevent the wire from coming off. Thereby, disconnection of the wire 20 is suppressed, and safety and reliability are improved.

  Here, in order for the stopper portion 31 to exhibit the function of preventing wire detachment, the stopper portion 31 needs to be provided in the vicinity of the pulley 25. That is, the stopper portion 31 is provided in the vicinity of the pulley 25 in the vicinity of both ends of the connection fitting 30. The stopper portion 31 is provided as close to the pulley 25 as the stopper portion 31 or the guide sleeve 35 does not interfere with the pulley 25. Specifically, the distance between the stopper portion 31 or the guide sleeve 35 and the pulley 25 is 1 ~ 15mm is good. With such a configuration, detachment of the wire 20 is suppressed.

  Further, the lifting device 2 has a pair of guide rollers 27 arranged adjacent to the pulley 25 around the guide pin 28 parallel to the pulley shaft 26 on the outer side of the pulley 25, that is, on both ends of the connection fitting 30. The guide roller 27 is rotatably supported by guide pins 28 attached to the support piece 33 of the connection fitting 30.

  With such a configuration, the wire 20 wound around the pulley 25 is sandwiched between the pulley 25 and the guide roller 27. As a result, the wire 20 can be easily moved with respect to the suction grille 5 and the wire 20 is prevented from being detached from the pulley 25. Therefore, the safety | security with respect to disconnection etc. of the wire 20 is improved, suppressing the inclination of the suction grille 5.

  Here, it is preferable that the guide pin 28 serving as the shaft of the guide roller 27 and the pulley shaft 26 serving as the shaft of the pulley 25 are set to substantially the same height. Thereby, the movement resistance of the wire 20 does not increase, and the wire 20 can be prevented from coming off.

  The pulley 25 and the guide roller 27 are preferably formed from, for example, a synthetic resin or the like, and in particular, formed from a synthetic resin material having excellent self-lubricating properties such as polyacetal. Thereby, the movement of the connection fitting 30 with respect to the wire 20 is facilitated, and the function of correcting the inclination of the suction grill 5 is enhanced.

  Further, a spring 23 as an elastic member sandwiched between the stopper portion 31 and the retaining member 22 is interposed between the stopper portion 31 and the retaining member 22. The spring 23 is a coil spring, and the wire 20 is inserted through the winding center side of the spring 23.

  By providing the spring 25 in this manner, when the retaining member 22 fixed to the wire 20 is inclined and the suction grill 5 is inclined, the stopper portion 31 or the guide sleeve 35 and the retaining member 22 As a result, the spring 23 is compressed. And the force which pulls apart the stopper part 31 and the retaining member 22 acts with the restoring force of the compressed spring 23. FIG. As a result, the suction grille 5 can easily return to the original substantially horizontal state, and the posture of the suction grille 5 is stabilized.

  As the elastic member, in addition to the spring 25 described above, various shaped springs made of various elastic materials can be employed. The configuration using the coiled spring 25 is excellent in that it is possible to insert the wire 20 through the spring 25 and hold the spring 25, so that it is not necessary to separately provide a member or the like for holding the elastic member. .

Next, a configuration for attaching the connection fitting 30 of the lifting device 2 to the suction grill 5 and an attachment operation will be described in detail.
6A is a perspective view showing a state in which the connection fitting 30 of the lifting device 2 is placed on the grill support member 40, and FIG. 6B is an enlarged view of the vicinity of the portion B shown in FIG. 6A. It is a perspective view. FIG. 6C is an enlarged perspective view in the vicinity of part B showing attachment of the fall prevention member 48, and FIG. 6D is an enlarged perspective view in the vicinity of part B showing attachment of the nut 50. FIG.

  When the lifting device 2 is shipped as a product, components such as the pulley 25 and the wire 20 are assembled in advance with respect to the connection fitting 30. The grill support member 40 is also assembled in advance with respect to the suction grill 5 (see FIG. 2). Therefore, the operation | work which attaches the suction grill 5 to the raising / lowering apparatus 2 demonstrated here is mainly performed in the field where the air conditioner 1 is installed.

  As shown in FIGS. 6A and 6B, in order to connect the suction grill 5 to the lifting device 2, first, the connection fitting 30 is placed on the grill support member 40 that supports the suction grill 5. The At that time, the threaded portion 41 protruding upward from the upper surface of the grill support member 40 is inserted into the fixing holes 34 formed in the vicinity of both ends of the connection fitting 30. Thereby, positioning of the connection metal fitting 30 can be performed easily, and the connection metal fitting 30 can be arranged at a predetermined position.

  Next, as shown in FIG. 6C, drop-off prevention members 48 are attached in the vicinity of both end portions of the connection fitting 30 placed on the grill support member 40. Specifically, the drop-off prevention member 48 is made of a steel plate or the like bent in a substantially U shape, and is mounted so as to sandwich the connection fitting 30 and the grill support member 40 from the through portion 42 formed in the grill support member 40. Is done. The grill support member 40 is also a sheet metal part formed by bending from a steel plate or the like, and a through portion 42 penetrating from the upper surface to the lower surface is formed so that the drop-off preventing member 48 can be mounted as described above.

  When the drop-off prevention member 48 is attached, the lower surface of the upper piece bent into the U shape of the drop-off prevention member 48 comes into contact with the upper surface of the connection fitting 30, and the lower piece bent into the U-shape of the drop-off prevention member 48. Is in contact with the lower surface of the grill support member 40. Accordingly, the grill support member 40 is temporarily fixed to the connection fitting 30, and the connection support 30 can lift the grill support member 40 and the suction grill 5 connected thereto.

  Note that a cutout portion 49 into which the screw portion 41 is inserted is formed in the upper piece of the dropout prevention member 48. When attaching the drop-off prevention member 48, the screw portion 41 of the grill support member 40 is inserted into the notch 49 of the drop-off prevention member 48. This facilitates the positioning of the dropout prevention member 48.

  Next, as shown in FIG. 6D, a fixing nut 50 is screwed onto the screw portion 41 from above the drop-off preventing member 48, and the connection fitting 30 is supported by the grill by fastening the screw portion 41 and the nut 50. It is fixed to the member 40.

  As described above, in the lifting device 2 according to the present embodiment, the connection work between the lifting device 2 and the suction grill 5 can be easily performed without performing the connection 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 connection fitting 30 pre-connected to the wire 20 to the grill support member 40 that supports the suction grill 5, It can be easily attached to the lifting device 2.

  The first advantage of providing the drop-off prevention member 48 as described above is that the drop-off prevention member 48 can prevent the suction grill 5 from dropping even if the nut 50 is removed for some reason.

  The second advantage of the provision of the drop-off prevention member 48 is that the suction grill 5 can be easily attached. That is, in the method of connecting a wire to a connector or the like as in the prior art, since both hands are used for connecting the wire, the work of lifting and supporting the suction grill by only one operator and connecting the wire is not necessary. It was difficult. In the lifting device 2 according to the present embodiment, by using the drop-off prevention member 48, the suction grill 5 can be attached by only one operator.

  Specifically, the operator can support the suction grille 5 with one hand and place the fitting 30 on the grill support member 40 with the other hand, and then attach the drop-off prevention member 48 with the other hand. it can. Then, even if the one hand supporting the suction grille 5 is released, the suction grille 5 does not fall, so the nut 50 can be tightened using both hands.

  The present invention is not limited to the above embodiment. For example, in the above description, the configuration in which the suction grill 5 is lifted at two locations in the center of the suction grill 5 using the lifting device 2 having the pair of winding drums 12 has been described. 12 may be provided. That is, it is also possible to employ a configuration in which the suction grille 5 is suspended at two places on the opposite side of the suction grille 5 for a total of four places. In addition, the present invention can be variously modified without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Lifting device 3 Suction chamber 5 Suction grill 10 Hoisting device 12, 12A, 12B Winding drum 13 Spring mechanism 14 Clutch mechanism 20 Wire 22 Pull-out member 23 Spring 25 Pulley 27 Guide roller 30 Connecting bracket 31 Stopper part 35 Guide sleeve 37 Frame 38 Base plate 40 Grill support member 45 Filter 48 Fall prevention member

Claims (4)

A lifting device that is provided in an air conditioner installed above a room and raises and lowers a suction grill of the air conditioner,
A pair of winding drums provided on the main body side of the air conditioner;
A wire having one end connected to one of the winding drums and the other end connected to the other winding drum and being wound up by the winding drum;
A connection fitting that is suspended by the wire and connected to the suction grille,
A pair of pulleys that are rotatably supported on a pair of parallel shafts provided on the connection fitting and on which the wire is wound;
A pair of stoppers formed on the connection fitting between the pair of pulleys, the wire between the pair of pulleys being movably inserted in the extending direction;
A pair of retaining members that are fixed to the wire between the pair of stopper portions and cannot pass through the stopper portion;
The elevating device according to claim 1, wherein the suction grille is restricted from inclining when the retaining member abuts against the stopper portion. A pair of guide rollers that are arranged adjacent to each other with the shaft parallel to the pulley and are rotatably supported by the connection fitting,
The lifting device according to claim 1, wherein the wire wound around the pulley is sandwiched between the pulley and the guide roller.   The elevating device according to claim 1 or 2, wherein an elastic member sandwiched between the stopper portion and the retaining member is interposed between the stopper portion and the retaining member.   The lifting device according to any one of claims 1 to 3, wherein the connection fitting is detachably attached to the suction grille.

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