JPH05310029A - Air passage changeover device - Google Patents

Abstract

PURPOSE:To prevent effectively a situation in which a wire falls into the state of being wound out of order at a process in which the wire is wound up to a pulley. CONSTITUTION:A first pulley 21 possesses integrally a drum portion 25 that winds up a wire 23, and a pair of flange portions 26, 27 that prevent the wire 23 from coming off. The axial size of the drum portion 25 is made to be a size in which the wire 23 can be wound up more than plural times in the state of being marshaled. At the flange portion 26 on one side, a thick portion 29 which possesses a wire guide portion 29a that bulges out to the drum portion 25 side with a predetermined size (a size equivalent to the semicircle of the drum portion 25) extending to the opposite direction from the winding start end of the wire 23, is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air passage switching device in which the opening of an air passage portion is changed in accordance with the movement of a film member. The present invention relates to an air passage switching device configured to connect a pulley to each winding shaft and to hang a wire between each pulley in order to rotate a pair of connected winding shafts in a synchronized state.

[0002]

2. Description of the Related Art In recent years, in an air passage switching device provided in an air conditioner for an automobile, a blower mode switching damper, an air mix damper and the like are film dampers using a film member made of a flexible material such as a plastic film. It is considered that such a structure simplifies the structure and reduces the overall weight and size.

In this type of air passage switching device, in order to move the film damper in the forward and reverse directions, both ends of the film damper are connected to different winding shafts, respectively. In order to rotate the pulleys in synchronization with each other, a pulley is connected to each winding shaft, and a wire is stretched between these pulleys. The pulley used in this case includes a drum portion having a width dimension capable of being wound in a state in which the wires are aligned a plurality of times or more, and a pair of wires integrally provided on both sides of the drum portion for preventing the wires from coming off. Is usually provided.

[0004]

In the case of using the simple pulley as described above, there is a possibility that the wire may be in a so-called irregular winding state while being wound on the drum portion of the pulley. When such a winding condition occurs,
The newly wound wire may bite between the already wound wires, which may cause a noise such as an abnormal noise or a hindrance of rotation of the pulley and movement of the film damper. In order to deal with such a problem, it has been considered to form a spiral groove on the surface of the drum portion in which the winding wire is sequentially accommodated. However, a pulley provided with such a spiral groove has a complicated shape. Therefore, the manufacturing cost will rise sharply.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent a situation in which a wire is randomly wound during winding a wire around a pulley without complicating the shape of the pulley. An object is to provide an air passage switching device that can be effectively prevented.

[0006]

In order to achieve the above object, the present invention provides a film-like member which changes the opening of an air passage portion in response to movement in a state of facing the air passage portion.
A pair of take-up shafts connected to both ends of the membranous member so as to selectively move the membranous member in forward and reverse directions according to the rotation of the film-shaped member, and a pair of take-up shafts respectively connected to the respective take-up shafts. A pulley, a wire wound between the pulleys to rotate the respective winding shafts in a synchronized state, and a driving unit that rotationally drives at least one of the winding shafts to move the film-shaped member. In the air passage switching device consisting of
The pulley is configured to include a drum portion for winding the wire, and a pair of flange portions integrally provided on both sides of the drum portion for preventing the wire from coming off, and a shaft of the drum portion. The directional dimension is set to a dimension that allows the wire to be wound in a state in which the wires are aligned a plurality of times or more, and the wire guide portion bulging toward the drum side is provided on one of the flange portions opposite to the winding start end of the wire. The thick portion is formed to have a predetermined dimension in the direction.

Further, in the air passage switching device having the above-mentioned film-shaped member, the pair of winding shafts, the pair of pulleys, the wire and the driving means, the pulley is provided with a drum portion for winding the wire, and With a structure that includes a pair of flanges that are integrally provided on both sides of the drum to prevent the wires from coming off, and set the axial dimension of the drum to be approximately equal to the diameter of the wire. In addition, the rising dimension of the flange portion may be set to be a multiple of the diameter dimension of the wire or more.

[0008]

In the air passage switching device according to the first aspect of the present invention, the wire wound around the drum portion of the pulley has a winding start portion along the wire guide portion of the thick portion of the flange portion while the center of the drum portion is being wound. It will be orbited while being guided in the direction. Therefore, the newly wound wire does not overlap the winding start portion of the already wound wire as described above, and is guided by the already wound wire instead of the guide by the wire guide section described above. Become so. As a result, the winding wires are wound around the drum portion in an aligned state, thereby preventing the wire from being randomly wound.

In the air passage switching device according to the second aspect, the axial dimension of the drum portion of the pulley, that is, the dimension between the pair of flange portions is set to be substantially equal to the diameter of the wire, and the flange portion is also used. Since the rising dimension of the wire is set to be a multiple of the diameter of the wire or more, the wire wound around the drum portion is stacked and wound while being aligned in the radial direction of the drum portion. In other words, in this case, the wires are positively wound in an aligned state, which prevents the wires from being randomly wound.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to an automobile air conditioner will be described below with reference to FIGS.

In FIG. 4 showing a schematic cross-sectional structure of an automobile air conditioner, a defroster outlet 3 is formed at the most downstream side of a duct 2 having a blower 1 at the most upstream side, and this outlet is also provided. A face outlet 4 and a foot outlet 5 are formed on both sides of 3. The outlets 3 to 5 are
The defroster outlet 3 is provided to blow out the conditioned air toward the windshield, and the face outlet 4 is provided to blow out the conditioned air toward the upper body of the occupant. The foot outlet 5 is provided to blow out the conditioned air to the feet of the occupant.

Inside the duct 2, an evaporator 6 for cooling air is arranged at a portion near the blower 1, and a heater core 7 is arranged at a portion downstream of the evaporator 6 and at a bottom portion side of the duct 2. In this case, the heater core 7
Is provided in a form orthogonal to the evaporator 6,
As a result, in the duct 2, the air mix ventilation passage 8 and the bypass ventilation passage 9 (each corresponding to the air passage portion of the present invention) divided by the heater core 7 are formed.

The air mix ventilation passage 8 is located on the upstream side of the heater core 7, and the air passing therethrough is heated by passing through the heater core 7 to become warm air. Also,
The bypass ventilation passage 9 is provided to allow the air cooled by the evaporator 6 to flow without passing through the heater core 7.

Air mix ventilation passage 8 in duct 2
The take-up shafts 10 and 11 are rotatably supported at the positions facing the lower end and the upper end of the bypass ventilation passage 9, respectively. The winding shafts 10 and 11 are connected to both ends of a film damper 12 for air mix, which corresponds to the film-shaped member in the present invention.
The film damper 12 can be selectively moved in the forward and reverse directions according to the forward and reverse rotations of 0 and 11. It should be noted that one winding shaft 10 is directly rotated by a motor 13 (corresponding to the driving means in the present invention) having a speed reduction mechanism,
The other winding shaft 11 is rotated by the motor 13 via a pulley and a wire (not shown).

The film damper 12 is made of, for example, a flexible polyethylene resin, and the film take-up shaft 10,
It is provided so as to correspond to both the air mix ventilation passage 8 and the bypass ventilation passage 9 by being bridged between 11 and to be in contact with the end face of the heater core 7 on the evaporator 6 side.

Although not shown, an opening is formed at a predetermined position of the film damper 12, and this opening is
By selectively facing one or both of the air mix ventilation passage 8 and the bypass ventilation passage 9 according to the movement of the film damper 12, the opening degree of the ventilation passages 8 and 9 is changed. Therefore, the ratio of the amount of air blown through the air mix air passage 8 and the amount of air blown through the bypass air passage 9 can be arbitrarily adjusted according to such a change in the opening degree. In addition, the winding shaft 1 in the duct 2
A plate-shaped damper 14 for bypassing the cold air is provided at an upper portion of the plate 1. The plate-shaped damper 14 is rotated to a position indicated by a chain double-dashed line in the figure at the time of maximum cooling, and the evaporator 6 is rotated.
The cooling air is guided to the defroster outlet 3 and the face outlet 4 sides.

On the other hand, in the duct 2 at the position facing the blower 1 side end of the face outlet 4 and the position facing the heater core 7 side end of the foot outlet 5 respectively.
The winding shafts 15 and 16 are rotatably supported. Also,
The guide roller shaft 1 is provided at each of the intermediate position between the defroster outlet 3 and the face outlet 4 and the intermediate position between the defroster outlet 3 and the foot outlet 5 in the duct 2.
7, 18 are rotatably supported with a predetermined gap between them and the duct 2. On the winding shafts 15 and 16,
Both ends of the film damper 19 for switching the blowing mode corresponding to the film-like member in the present invention are connected, and the film damper 19 is selectively moved in the forward and reverse directions according to the forward and reverse rotations of the winding shafts 15 and 16. Can be moved to.

The film damper 19 is made of, for example, a flexible polyethylene resin and has the winding shaft 15,
It is provided so as to be movable in a state of facing the defroster outlet 3, the face outlet 4, and the foot outlet 5 by being hung across the space between the guide roller shafts 17 and 18 and the duct 2. ing.

As shown in FIG. 3, the film damper 19 has a plurality of first openings 19a selectively opposed to the face outlet 4, a defroster outlet 3 and a foot outlet 5 selectively. The plurality of second openings 19b facing each other are formed in a state of being separated from each other with a predetermined dimension in the moving direction of the film damper 19. As a result, the first opening 19a is selectively opposed to the face outlet 4 according to the movement of the film damper 19, and the second opening 19b is provided to one or both of the defroster outlet 3 and the foot outlet 5. By selectively opposing them, the openings of the outlets 3 to 5 can be changed, and a plurality of types of air blowing modes can be obtained according to such changes in the openings.

The blower mode is the DEF mode in which air is blown only from the defroster outlet 3 and the defroster outlet 3
And FOOT / DE that blows from both the foot outlet 5
F mode, FOOT that blows air only from the foot outlet 15
There are five modes: a BI-LEVEL mode in which air is blown from both the face air outlet 14 and the foot air outlet 15, and a FACE mode in which air is blown only from the face air outlet 14.

FIG. 3 is an exploded perspective view schematically showing the main part of FIG. 4 with a part of the main parts omitted in order to facilitate understanding of the part related to the gist of the present invention. In the following, description will be made also with reference to FIG.

That is, the winding shaft 15 is connected at its one end to a motor 20 (corresponding to driving means in the present invention) having a speed reducing mechanism built therein, and at the other end thereof, the first pulley 21 is in a non-rotating state. It is connected. In addition, the winding shaft 16 has the first
A second pulley 22 is connected to the end on the same side as the pulley 21 in a non-rotating state, and a wire 23 is stretched between these pulleys 21 and 22. In this case, the winding direction of the wire 23 around the first pulley 21 and the second pulley 22 is the winding shaft 15 corresponding to each pulley 21 and 22.
And 16 are set so as to be opposite to the winding direction of the film damper 19.

Therefore, when the winding shaft 15 and the first pulley 21 are rotated in the direction of arrow A in FIG. 3 by the motor 20, the film damper 19 is wound around the winding shaft 15 and is wound up. The shaft 16 and the second pulley 22 are also rotated in the direction of arrow A, and accordingly, the second pulley 22 is rotated.
Will wind up the wire 23 sent out from the first pulley 21. On the contrary, the winding shaft 1 is driven by the motor 20.
5 and the first pulley 21 are rotated in the direction opposite to the arrow A, the second pulley 22 and the winding shaft 16 are moved in the opposite direction to the arrow A in response to the wire 23 being wound around the first pulley 21. Then, the film damper 19 is wound around the winding shaft 16. As a result,
By rotating the motor 20 forward and backward, the film damper 19 can be reciprocated in forward and backward directions.

As shown in FIG. 3, the film damper 1
A row of through holes 19c is provided at the edge of 9 along the moving direction, and this row of through holes 19c is provided to the photo interrupter 2
4 (see FIG. 4) or other detecting means is used to detect the moving position of the film damper, and the moving position of the film damper 19 is controlled based on such detection information. Is supposed to do.

Now, the specific structure of the first pulley 21 will be described below with reference to FIGS. 1 and 2. Since the second pulley 22 has a shape that is symmetrical with the first pulley 21, its description is omitted.

In FIGS. 2A, 2B and 2C, the first
The respective states of the pulley 21 as viewed from the top, front, and bottom are shown. In FIG. 2, the first pulley 21 includes a drum portion 25 for winding the wire 23 and a pair of flange portions 26, 27 integrally provided on both sides of the drum portion 25 for preventing the wire 23 from coming off. It is configured with and. In this case, the axial dimension d of the drum portion 25 is set to a dimension that allows the wire 23 to be wound in a state in which the wires 23 are aligned a plurality of times or more.

In addition, a slit 28 for holding the winding start end of the wire 23 is formed in the one flange portion 26.
The wire guide portion 29a is formed so as to extend from the outer peripheral portion of the flange portion 26 to the drum portion 25, and the wire guide portion 29a bulging toward the drum portion 25 side (the other flange portion 27 side) is opposite to the winding start end of the wire 23. A thick portion 29 having a predetermined dimension in this direction (a dimension corresponding to a half circumference of the drum portion 25 in this embodiment) is formed.

In FIG. 1, the wire 2 is attached to the first pulley 21.
A state in which 3 is wound several times is schematically shown.
As can be understood from FIG. 1, the wire 23 in which the winding start end is held by the slit 28 is wound on the drum portion 25 of the first pulley 21, and the winding start portion of the wire 23 is the flange portion 26. While being guided along the wire guide portion 29a formed in the thick-walled portion 29 toward the center of the drum portion 25, it is circulated.

Therefore, the wire 23 newly wound up
Does not overlap the already wound wire 23 as described above, and is guided by the already wound wire 23 instead of the guide by the wire guide portion 29a as described above. As a result, the winding wires 23 are sequentially wound around the drum portion 25 in an aligned state, thereby preventing the wire 25 from being randomly wound. Therefore, the newly wound wire 23 does not bite between the already wound wires 23, and abnormal noise may occur, or the rotation of the pulleys 21 and 22 and the movement of the film damper 29 may be hindered. It will disappear. Moreover, in order to sequentially wind the wire 23 around the drum portion 25 in this manner, the flange portion 26
Since it suffices to provide the thick-walled portion 29 on the surface of the drum portion 25, there is no need to provide a spiral groove on the surface of the drum portion 25 unlike the conventional configuration, and there is no fear that the shapes of the first pulley 21 and the second pulley 22 become complicated. It is a thing.

The film damper 12 for air mix
The pulleys (not shown) provided on the winding shafts 10 and 11 corresponding to the above are also configured in the same shape as the first pulley 21.

A second embodiment of the present invention is shown in FIGS. 5 and 6, and only the portions different from the first embodiment will be described below.

That is, in this embodiment, the winding shafts 15 and 16 are
The pulley 30 having the shape shown in FIGS. 5 and 6 is connected to each end of the above, and the wire 23 is stretched between the pulleys 30. The pulley 30 includes a drum portion 31 for winding the wire 23, and a pair of flange portions 32, 33 integrally provided on both sides of the drum portion 31 for preventing the wire 23 from coming off. Is becoming In this case, the axial dimension e of the drum portion 31 (that is, the flange portion 3
(Between 2 and 33) to be substantially equal to the diameter of the wire 23 (specifically, to be slightly increased).
In addition to the setting, the rising dimension f of the flange portions 32 and 33 is set to be a multiple of the diameter of the wire or more.

According to this embodiment having such a structure,
The wire 23 wound around the drum portion 31 is
In the state of being aligned in the radial direction of No. 1, they are stacked and wound. That is, in this case, the wires 23 are positively wound in an aligned state in an overlapping manner, which prevents the wire 23 from being in a randomly wound state, and
The same effect as that of the embodiment can be obtained.

In each of the above embodiments, a pair of winding shafts 1 is used.
Each of 0, 11 and 15, 16 is connected to the motor 13 or 20.
However, for example, the wire (not shown) that is wound between the winding shafts 10 and 11 and the wire 23 that is wound between the winding shafts 15 and 16 are fed by using a motor. Both of the winding shafts 10, 11 and 15, 16 may be indirectly rotationally driven by being driven and driven by the device.

In addition, the present invention is not limited to each of the above-described embodiments, and is not limited to, for example, an automobile air conditioner, but can be widely applied to general devices having a function of adjusting the opening of an air passage. The present invention can be variously modified and implemented without departing from the gist thereof.

[0036]

As is apparent from the above description, according to the present invention, the flange portion for preventing the wire detachment of the pulley is formed with a thick portion, or the dimensions of the drum portion and the flange portion of the pulley are predetermined. By adopting a configuration in which the wire is simply set to, it is possible to effectively prevent the situation in which the wire becomes irregularly wound in the process of winding the wire around the pulley without complicating the shape of the pulley. Is played.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a main part of a first embodiment of the present invention.

FIG. 2 shows the structure of a pulley, (a) is a top view,
(B) is a front view, (c) is a bottom view

FIG. 3 is an exploded perspective view schematically showing a main part with a part thereof omitted.

FIG. 4 is a cross-sectional view showing a schematic structure of an automobile air conditioner.

FIG. 5 is a vertical cross-sectional view of a main part showing a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of the same main part.

[Explanation of symbols]

In the figure, 2 is a duct, 8 is an air mix ventilation passage (air passage portion), 9 is a bypass ventilation passage (air passage portion), 10, 11
Is a take-up shaft, 12 is a film damper (membrane member), 13 is a motor (driving unit), 15 and 16 are take-up shafts, 19 is a film damper (membrane member), 20 is a motor (driving unit),
21 is a first pulley, 22 is a second pulley, 23 is a wire,
Reference numeral 25 is a drum portion, 26 and 27 are flange portions, 28 is a slit (holding portion), 29 is a thick portion, 29a is a wire guide portion, 30 is a pulley, 31 is a drum portion, and 32 and 33 are flange portions.

Claims (2)

[Claims] 1. A film-like member that changes the opening of the air passage part in response to movement in a state of facing the air passage part, and the film which is connected to both ends of the film-like member according to the rotation of itself. A pair of winding shafts for selectively moving the member in the forward and reverse directions, and a pair of pulleys respectively connected to these winding shafts,
Air passage switching provided with a wire that is stretched between these pulleys to rotate the respective take-up shafts in a synchronized state, and a drive unit that rotationally drives at least one of the take-up shafts to move the film-shaped member. In the device, after the pulley is configured to include a drum portion for winding the wire, and a pair of flange portions integrally provided on both sides of the drum portion for preventing detachment of the wire, The axial dimension of the drum portion is set to a dimension that allows the wire to be wound in a state where the wires are aligned a plurality of times or more, and one of the flange portions has a wire guide portion that bulges toward the drum portion. An air passage switching device, wherein a thick wall portion having a predetermined size is formed in a direction opposite to a winding start end of the wire. 2. A film-like member for changing the opening of the air passage part in response to movement in a state of facing the air passage part, and the film which is connected to both ends of the film-like member according to the rotation of itself. A pair of winding shafts for selectively moving the member in the forward and reverse directions, and a pair of pulleys respectively connected to these winding shafts,
Air passage switching provided with a wire that is stretched between these pulleys to rotate the respective take-up shafts in a synchronized state, and a drive unit that rotationally drives at least one of the take-up shafts to move the film-shaped member. In the device, after the pulley is configured to include a drum portion for winding the wire, and a pair of flange portions integrally provided on both sides of the drum portion for preventing detachment of the wire, The axial dimension of the drum portion is set to be substantially equal to the diameter dimension of the wire, and the rising dimension of the flange portion is set to be a multiple of the diameter dimension of the wire or more. Aisle switching device.