JP4325338B2 - Air passage opening and closing device - Google Patents

Description

  The present invention relates to an air passage opening and closing device that opens and closes an air passage using a membrane member that forms a film door, and particularly relates to a fixing structure between an end portion of the membrane member and a take-up shaft. It is suitable for use in an apparatus.

  Conventionally, as an air passage opening and closing device in a vehicle air conditioner, a flat surface extending in the axial direction is formed on a part of the outer peripheral surface of a winding shaft that winds up a film-like member, and the flat surface and the winding shaft are There is known a structure in which the end of the film-like member is fixed to a winding shaft by sandwiching the end of the film-like member with a separate pressing member (see, for example, Patent Document 1).

As another conventional apparatus, a recess is formed on the outer peripheral surface of the take-up shaft, and a projection is formed in the recess, while an attachment piece having an attachment hole is formed at the end of the film member. A structure is known in which the end of the film-like member is fixed to the recess of the take-up shaft by inserting the attachment hole of the attachment piece into the protrusion of the take-up shaft and then caulking the protrusion. For example, see Patent Document 2).
Japanese Patent Laid-Open No. 10-230732 JP 2000-168340 A

  By the way, according to the former prior art, there is a problem that a separate part called a pressing member is specially required for fixing the membrane member and the winding shaft, and the cost increases due to an increase in the number of parts and the number of assembling steps. is there.

  In addition, according to the latter prior art, it takes time to heat caulk the protrusion of the winding shaft itself, and in addition to this, special equipment for heat caulking is required, which also increases the cost.

  In view of the above, the present invention has an object to make it possible to fix the end of the film-like member and the take-up shaft very easily without requiring separate parts.

In order to achieve the above object, in the first aspect of the present invention, the film-like member (16a) is air-wound by winding and rewinding the film-like member (16a) with the take-up shaft (17, 18). In the air passage opening and closing device for opening and closing the passages (14a, 15),
The winding shaft (17, 18) is provided with an axially extending slit groove (20) into which the end portion (24) of the film-like member (16a) can be inserted, and is associated with the slit groove (20). A pawl (21) is provided,
On the other hand, the end (24) of the membrane member (16a) is provided with a locking hole (25) that can be fitted into the locking claw (21),
By inserting the end (24) of the membrane member (16a) into the slit groove (20), the locking claw (21) and the locking hole (25) are fitted and locked. It is characterized by having made it.

  According to this, the membrane member (16a) can be fixed only by an extremely simple operation of inserting the end (24) of the membrane member (16a) into the slit groove (20) of the winding shaft (17, 18). You can finish the work. Therefore, compared with the prior arts of Patent Documents 1 and 2, a separate pressing member and heat caulking work can be eliminated, and the cost for fixing the film-like member (16a) can be greatly reduced.

Further, in the invention according to claim 1, wherein the slit groove (20), said film member slit portion having a predetermined height (H1) whose ends (24) are inserted in (16a) (20a 20b),
The height (H2) of the locking claw portion (21) is larger than the height (H1) of the slit-shaped portions (20a, 20b),
Furthermore, a gap portion (20c) higher than the height (H1) of the locking claw portion (21) is formed around the portion where the locking claw portion (21) is arranged.

  According to this, when inserting the end part (24) of the film-like member (16a) into the slit groove (20), the film-like part is formed on the tip part of the locking claw part (21) by the gap part (20c). Since the deformation space of the member (16a) can be secured, the end portion (24) of the film-like member (16a) is bent on the front end portion of the locking claw portion (21) and smoothly moved to the back side of the slit groove (20). Then, the locking hole (25) of the end (24) of the membrane member (16a) can be fitted and locked to the locking claw (21).

  On the other hand, once the locking hole (25) of the end (24) is once fitted and locked to the locking claw (21), the locking hole (25) is disengaged from the locking claw (21). Even if it tries, the wall surface of a slit-shaped part (20a, 20b) will hold | suppress an edge part (24), and will prevent detachment | leave of an edge part (24). For this reason, it is possible to reliably prevent the phenomenon that the end portion (24) naturally comes off from the locking claw portion (21).

In the invention according to claim 2, disposed in the air passage switching device according to claim 1, the left and right sides along the axial direction of the slit portion (20a, 20b) the winding shaft (17, 18) In addition, the engaging claw portion (21) and the gap portion (20c) are arranged between the slit-shaped portions (20a, 20b) on both the left and right sides.

  As a result, the locking claw portion (21) located at the axially central portion is fitted and locked in the locking hole (25), and the film is formed in the slit-shaped portions (20a, 20b) on both the left and right sides in the axial direction. The left and right sides of the end (24) of the member (16a) can be held. Therefore, the end portion (24) of the membrane member (16a) can be held and fixed in a balanced manner with respect to the axial direction.

As in the embodiment described in claim 3, in the air passage switching device according to claim 2, central opening located between the air gap, the left and right sides of the slit portion (20a, 20b) (20c ), The gap can be easily formed with a simple opening shape.

According to a fourth aspect of the present invention, in the air passage opening and closing device according to any one of the first to third aspects, a tip end portion of the locking claw portion (21) is more than the root portion of the slit groove (20). The latching claw portion (21) is inclined so as to be located on the back side.

  According to this, when the end portion (24) of the membrane member (16a) is inserted into the slit groove (20), the locking claw portion (21) is inclined toward the back side of the slit groove (20). Therefore, the latching claw part (21) can be easily overcome while the film-like member (16a) is bent.

  On the other hand, even when a tension force (force in the direction of arrow E in FIG. 5C) is applied to prevent the film-like member (16a) from loosening in the use state after the fixing work of the film-like member (16a) is completed. Since the inclination direction of the locking claw portion (21) is opposite to the tension force, it is ensured that the film-like member (16a) comes out of the locking claw portion (21) by the tension force of the locking stopper. Can be prevented.

According to a fifth aspect of the present invention, in the air passage opening and closing device according to any one of the first to fourth aspects, the locking claw portion (21) has a width dimension of a root portion rather than a width dimension of a tip portion. It is characterized in that it is formed in a larger trapezoidal shape.

  According to this, by setting the width dimension of the trapezoidal tip of the locking claw part (21) to be a predetermined amount smaller than the width dimension of the locking hole (25), the slit groove (20 of the membrane member (16a)) ) When inserted into the locking hole (25), the locking hole (25) can be easily fitted to the tip of the locking claw (21).

  On the other hand, the width dimension of the trapezoidal base part of the locking claw part (21) is set to be approximately the same as the width dimension of the locking hole (25), so that the film-like member (16a) is wound up. It can be accurately positioned and fixed with respect to the axial direction of the shaft (17, 18).

According to a sixth aspect of the present invention, in the air passage opening and closing device according to any one of the first to fifth aspects, the end portion is divided into a plurality of portions in the axial direction of the winding shaft (17, 18). A split end portion (24), and a groove (23) is formed between the plurality of split end portions (24),
On the other hand, the winding shaft (17, 18) is provided with a plurality of slit grooves (20) and a plurality of locking claws (21) corresponding to the plurality of divided ends (24),
Further, a cylindrical portion (22) is formed on the winding shaft (17, 18) corresponding to the groove (23) between the plurality of divided end portions (24),
The cylindrical portion (22) is fitted with a groove (23) between the plurality of divided end portions (24).

  According to this, at the start of insertion of the film-like member (16a) into the slit groove (20), the film is formed by fitting the groove (23) between the plurality of divided end parts (24) and the cylindrical part (22). The insertion operation of the membrane member (16a) can be started by simply determining the axial position of the member (16a). For this reason, the insertion operation of the film-like member (16a) can be easily performed.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, the first embodiment will be described with reference to FIGS. In the present embodiment, the present invention is applied to an air passage opening and closing device in an air conditioning unit 10 of a vehicle air conditioner.

  The air conditioning unit 10 shown in FIG. 1 is disposed at a substantially central portion in the vehicle left-right (width) direction of the inside of an instrument panel (not shown) at the front of the vehicle interior. In addition, the front and rear, and the up and down arrows in FIG. 1 indicate the vehicle mounting direction.

  The air conditioning unit 10 has an air conditioning case 11 made of resin that constitutes an air passage that blows air toward the vehicle interior. An air inlet space 12 is formed in a portion of the air conditioning case 11 that is closest to the front of the vehicle. Air blown from a blower unit (not shown) flows into the air inlet space 12.

  As is well known, this blower unit has an inside / outside air switching box for switching between outside air (vehicle interior air) and inside air (vehicle interior air) and a centrifugal electric blower. It blows toward the air inlet space 12 with an electric blower.

  In the air conditioning case 11, an evaporator 13 is disposed substantially vertically at a portion immediately after the air inlet space 12. As is well known, the evaporator 13 is a cooling heat exchanger that absorbs the latent heat of evaporation of the low-pressure refrigerant in the refrigeration cycle from the blown air to cool the blown air.

  And the heater core 14 is arrange | positioned at predetermined intervals on the air flow downstream side (vehicle rear side) of the evaporator 13. Here, the heater core 14 is inclined so that the upper part is positioned closer to the evaporator 13 (the vehicle front side) than the lower part. The heater core 14 is a heating heat exchanger that heats the cold air that has passed through the evaporator 13, and high-temperature hot water (engine cooling water) flows from a vehicle engine (not shown) into the heater core 14. Heat.

  As is well known, the evaporator 13 and the heater core 14 have a heat exchanging core portion composed of a flat tube through which refrigerant or hot water passes and a corrugated fin joined to the flat tube, and between the flat tubes of the heat exchanging core portion. Air passes through the gap.

  A cold air bypass passage 15 is formed above the heater core 14 in the air conditioning case 11. In this cold air bypass passage 15, the cold air after passing through the evaporator 13 flows by bypassing the heater core 14.

  In the air conditioning case 11, an air mix door 16 is disposed between the evaporator 13 and the heater core 14. The air mix door 16 is a film door, and is constituted by a flexible film-like member 16a.

  This film-like member 16a moves the cold air bypass passage 15 and the air passage 14a on the heater core 14 side in the vertical direction to adjust the opening degree of both the passages 14a and 15. Thereby, the temperature of the air which blows off into a vehicle interior is adjusted by adjusting the air volume ratio of cold air and warm air.

  Here, the air mix door 16 will be described more specifically. The film-like member 16a is formed into a long rectangular shape with a thin film-like resin material having excellent flexibility and strength like polyethylene resin. Then, the longitudinal direction of the film-like member 16a is directed in the vertical direction, and one end portion (upper end portion) of the film-like member 16a in the longitudinal direction is fixed to the first winding shaft 17, and the other in the longitudinal direction of the film-like member 16a. An end (lower end) is fixed to the second winding shaft 18.

  In addition, an opening 16b for allowing air to pass therethrough is formed in the middle of the membrane member 16a in the longitudinal direction (door movement direction). The opening 16b is preferably formed by being divided into a plurality of portions in the width direction of the film-like member 16a (perpendicular to the plane of FIG. 1) in order to ensure the strength of the film-like member 16a.

  In FIG. 1, the formation range of the opening 16b is indicated by a broken line, the opening 16b fully opens the air passage 14a on the heater core 14 side, and the film portion of the film-like member 16a fully closes the cold air bypass passage 15. The state which carries out, ie, the maximum heating state, is illustrated.

  The first take-up shaft 17 is disposed in the upper part of the cold air bypass passage 15 so as to extend in the left-right direction of the vehicle (the direction perpendicular to the plane of FIG. 1). Further, the second winding shaft 18 is disposed so as to extend in the left-right direction of the vehicle at the lower portion on the upstream side of the heater core 14. The first and second winding shafts 17 and 18 are rotatably supported by the air conditioning case 11, respectively.

  The operation mechanism of the air mix door 16 (film-like member 16a) will be described more specifically. One of the first and second winding shafts 17 and 18, for example, the first winding shaft 17 and the step motor or the like. Is connected to an actuator (not shown), and the first winding shaft 17 is rotationally driven in both forward and reverse directions by this actuator.

  Then, since the rotation of the first winding shaft 17 is also transmitted to the second winding shaft 18 via a rotation transmission mechanism (not shown), the second winding shaft 18 is positively linked with the first winding shaft 17. It rotates in both reverse directions. Thereby, the film-like member 16a can be wound and unwound with respect to the first and second winding shafts 17 and 18.

  In the air conditioning case 11, a plurality of blowout openings (not shown) are formed on the downstream side of the air flow of the heater core 14 and the cold air bypass passage 15 to blow out air toward a plurality of portions in the vehicle interior. Specifically, the blowout opening is a defroster opening, a face opening, a foot opening, or the like, and the air whose temperature is adjusted by the air mix door 16 is blown into the vehicle interior through these openings. .

  Next, a fixing structure between the end of the film-like member 16a and the first and second winding shafts 17 and 18 will be described in detail with reference to FIGS. FIG. 2 shows the first and second winding shafts 17 and 18, and FIG. 3 shows the end of the film-like member 16 a fixed to the first and second winding shafts 17 and 18. A slit groove 20 is formed in the first and second winding shafts 17 and 18 so as to extend in the axial direction. The slit groove 20 is formed in a plurality of locations along the axial direction, and in four locations in the illustrated example.

  The slit groove 20 is formed with slit-shaped portions 20a and 20b having a predetermined height H1 shown in FIG. 2 (f) on both the left and right sides in the axial direction, and a central opening between the left and right slit-shaped portions 20a and 20b. Part 20c is formed. The central opening 20c has a shape that directly opens the slit groove 20 on the radially outer side of the first and second winding shafts 17 and 18.

  As shown in FIG. 2F, the slit-shaped portions 20a and 20b of the slit groove 20 are formed in a straight groove shape from the outer peripheral surface of the shaft with the predetermined height H1. Here, the slit groove 20 is formed in parallel with the straight line b at a position shifted from the straight line b passing through the axial center a. Since the slit-shaped portions 20a and 20b are for inserting the end portions of the film-shaped member 16a, the height H1 of the slit-shaped portions 20a and 20b is made a predetermined amount larger than the plate thickness of the film-shaped member 16a.

  And the latching claw part 21 is formed in the slit groove | channel 20 in the formation part of the center opening part 20c. The locking claw portion 21 protrudes upward from the bottom surface portion of the slit groove 20 in a trapezoidal shape (see FIG. 2B), that is, a shape in which the width of the root portion is larger than the width of the tip. And the latching claw part 21 is inclined (refer FIG.2 (d)) so that the front-end | tip part of this latching claw part 21 may be located in the back | inner side of the slit groove 20 rather than a root part.

  Moreover, the height H2 of the latching claw part 21 is made higher by a predetermined amount than the height H1 of the slit-shaped parts 20a, 20b. Then, as shown in FIG. 2 (d), the central opening 20 c forms a gap higher than the height H 2 of the locking claw 21 around the portion where the locking claw 21 is disposed.

  A cylindrical portion 22 is formed between the four slit grooves 20 in the axial direction of the first and second winding shafts 17 and 18. A rectangular groove 23 is formed at a portion of the end of the film-like member 16a facing the cylindrical portion 22. The width dimension W1 of the groove 23 is larger than the width dimension (axial dimension) W2 of the cylindrical portion 22 by a predetermined amount so that the groove 23 can be fitted into the cylindrical portion 22.

  Since the groove 23 is formed in three places within the width dimension of the film member 16 a, the end of the film member 16 a is divided into four divided ends 24. The width dimension of the film-like member 16a is slightly smaller than the axial dimension of the first and second winding shafts 17 and 18, as shown in FIG. In the four divided end portions 24, rectangular locking holes 25 are respectively formed at portions of the first and second winding shafts 17 and 18 facing the four locking claws 21.

  In order to engage and lock the locking claw portion 21 in the locking hole 25, the width dimension of the distal end portion of the locking claw portion 21 is made a predetermined amount smaller than the width dimension W3 of the locking hole 25. The width of the base portion of the pawl 21 is set to be approximately the same as the width W3 of the locking hole 25.

  In this embodiment, the first and second winding shafts 17 and 18 are made of resin, and the shape of the slit groove 20 having the locking claw portion 21 is integrated with the first and second winding shafts 17 and 18 by resin molding. Can be formed.

  Next, the fixing operation of the end portion of the film-like member 16a and the first and second winding shafts 17 and 18 according to the present embodiment will be specifically described. First, the divided end portion 24 of the film-like member 16a. Is inserted into the slit groove 20 of the first and second winding shafts 17 and 18 as shown by the arrow D in FIGS. 4 (a) and 5 (a).

  At this time, the groove 23 of the film-like member 16a is fitted into the cylindrical portion 22 of the first and second take-up shafts 17 and 18, whereby the film-like member 16a with respect to the first and second take-up shafts 17 and 18 is obtained. The position in the axial direction can be easily determined. Therefore, the insertion of the film-like member 16a into the slit groove 20 can be easily started.

  Then, when the insertion of the membrane member 16a is advanced, the distal end portion of the divided end portion 24 of the membrane member 16a hits the trapezoidal locking claw portion 21. Here, the trapezoidal locking claw portion 21 is inclined toward the back side of the slit groove 20 (the right side in FIG. 2D), and a central opening is formed around the locking claw portion 21. Since the gap part higher than the latching claw part 21 is formed by 20c, as shown in FIGS. 4 (b) and 5 (b), the split end part 24 of the film-like member 16a is latched while being bent upward. The claw portion 21 can be easily climbed over.

  Thereby, the membranous member 16a can be inserted until the distal end portion of the split end portion 24 of the membranous member 16a hits the rear end portions of the slit-shaped portions 20a and 20b of the slit groove 20. And when the front-end | tip part of the division | segmentation edge part 24 of the film-like member 16a hits the back | inner side edge part of the slit groove | channel 20, the locking hole 25 of the film-like member 16a is located on the front-end | tip part of the locking claw part 21. Since the opening position of the locking hole 25 is set in advance, the distal end portion of the locking claw portion 21 is inserted into the locking hole 25.

  At this time, the locking claw portion 21 is formed in a trapezoidal shape, and the width dimension of the distal end portion of the locking claw portion 21 is made smaller than the width dimension W3 of the locking hole 25 by a predetermined amount. Can be easily inserted into the locking hole 25.

  Then, the divided end portion 24 of the film-like member 16a that has been bent upward by the pressing force of the locking claw 21 returns to the original flat plate state by its own elastic restoring force, and the locking claw 21 The locking hole 25 is fitted and locked to the root portion of the. Here, the width dimension of the trapezoidal root part of the locking claw part 21 is larger than the width dimension of the trapezoidal tip part, and the width dimension of the trapezoidal root part of the locking claw part 21 is set to the locking hole 25. The width dimension W3 is set to approximately the same size. Therefore, as shown in FIGS. 4C and 5C, the locking hole 25 portion of the membrane member 16 a can be accurately positioned at the trapezoidal root portion of the locking claw portion 21.

  According to this embodiment, the fixing operation of the film-like member 16a can be completed only by an extremely simple operation of inserting the end portion of the film-like member 16a into the slit groove 20 of the first and second winding shafts 17 and 18. . Therefore, compared with the prior arts of Patent Documents 1 and 2, a separate pressing member and heat caulking work can be eliminated, and the cost for the fixing structure of the film-like member 16a can be greatly reduced.

  In addition, since the latching claw portion 21 is inclined toward the back side of the slit groove 20, when the membrane member 16a is inserted, the latching claw portion 21 can be easily climbed while the membrane member 16a is bent.

  On the other hand, after the fixing operation is completed, in other words, in the usage state of the film member 16a, a tension force (force in the direction of arrow E in FIG. 5C) acts on the film member 16a to prevent loosening. Since the inclination direction of the locking claw portion 21 is opposite to the tension force, the film-like member 16a can be reliably prevented from coming out of the locking claw portion 21 with the tension force for preventing the loosening.

  Moreover, since the height H2 of the locking claw portion 21 is made higher than the height H1 of the slit-shaped portions 20a, 20b of the slit groove 20, the locking hole 25 of the divided end portion 24 is on the slit groove 20 side. Once the engaging claw portion 21 is fitted and locked, the wall surfaces of the slit-shaped portions 20a and 20b are separated from each other even if the locking hole 25 of the split end portion 24 is about to come off from the locking claw portion 21. The part 24 is pressed to prevent the split end part 24 from coming off. For this reason, it can prevent reliably that the division | segmentation edge part 24 remove | deviates from the latching claw part 21 naturally.

(Second Embodiment)
In the first embodiment, the film-shaped member 16a is wound and rewound by rotating the winding shafts 17 and 18, and the film-shaped member 16a having the opening 16b moves on the air passages 14a and 15. However, in the second embodiment, one end of the membrane member is fixed to the fixing portion on the case side, and the membrane member is moved. A film-like member from the fixed portion is provided by fixing the end portion to the winding shaft and providing a mechanism for moving the winding shaft on the air passage while rotating the winding shaft itself. The present invention relates to a type that changes the length and opens and closes the air passage, that is, a winding shaft moving system.

  6 and 7 show the second embodiment, and one air passage 15 is opened in the air conditioning case 11. Specifically, the air passage 15 is, for example, the cold air bypass passage 15 described above. Of course, the air passage 15 may be the air passage 14a on the heater core 14 side.

  A plurality of grids 26 are provided integrally with the air conditioning case 11 on the opening end face on the upstream side of the air passage 15. The plurality of lattices 26 prevent the film-like member 16a from being bent toward the leeward side by wind pressure, and extend in parallel to the moving direction F of the winding shaft 17.

  And the fixing | fixed part 27 which fixes the one end part of the film-like member 16a to the air-conditioning case 11 is arrange | positioned at the peripheral part (namely, opening part outer side) of the opening end surface of the upstream of the air path 15. Specifically, the fixing portion 27 is constituted by a rivet-like member or the like that is fixed to the air conditioning case 11 through an attachment hole near one end of the membrane member 16a.

  The other end of the film-like member 16a is fixed to the take-up shaft 17, and is taken up by the take-up shaft 17 or unwound (sent out) from the take-up shaft 17. The take-up shaft 17 is arranged inside the air conditioning case 11 so as to be able to move while rotating in the direction of arrow F on the open end surface of the air passage 15.

  For this purpose, spur gears 28a and 28b are provided in the vicinity of both ends of the winding shaft 17, and the air conditioning case 11 has a linear shape extending in the direction of arrow F along the peripheral edge of the opening end surface of the air passage 15. A gear (not shown) is provided, and the gears 28a and 28b of the winding shaft 17 are engaged with the linear gear on the air conditioning case 11 side.

  A worm wheel 28c of the worm gear mechanism is provided adjacent to the gear 28a at one axial end of the winding shaft 17.

  On the other hand, an actuator 29 such as a step motor is disposed outside the air conditioning case 11, and a drive shaft 30 that is rotationally driven by the actuator 29 is rotatably supported by a bearing hole 31 on the wall surface of the air conditioning case 11. The drive shaft 30 and the take-up shaft 17 are arranged so as to intersect orthogonally at the periphery of the opening of the air passage 15.

  A worm 32 of a worm gear mechanism is formed in a portion of the drive shaft 30 located in the air conditioning case 11. The worm 32 is formed in a screw shape on the outer peripheral surface of the drive shaft 30, and the worm 32 is formed over the entire length of the movement range of the winding shaft 17 in the arrow F direction in the axial direction of the drive shaft 30. ing. The worm 32 and the worm wheel 28c of the winding shaft 17 are engaged with each other.

  In the second embodiment, when the drive shaft 30 rotates, the winding shaft 17 moves in the direction of arrow F in FIGS. 5 and 6 while rotating through the meshing portion between the worm 32 and the worm wheel 28c. The movement of the winding shaft 17 causes the other end side of the film-like member 16a to be wound and sent out, and the length of the film-like member 16a from the fixed portion 27 changes to open and close the opening of the air passage 15. it can.

  In FIG. 6, the film-shaped member 16 a is wound up to the take-up shaft 17 to the maximum by moving the take-up shaft 17 to the lowest end position in the arrow F direction (position closest to the fixed portion 27). Shows the state.

  6 shows a state in which the length of the film-like member from the fixing portion 27 is the minimum value and the air passage 15 is fully opened. An arrow G indicates conditioned air flowing through the fully opened air passage 15 to the downstream side.

  On the other hand, FIG. 7 shows a state in which the take-up shaft 17 has moved to an intermediate portion in the direction of arrow F and about half of the film-like member 16a has been sent out from the take-up shaft 17. In the illustrated state of FIG. 6, the opening degree of the air passage 15 is about half.

  As described above, in the second embodiment, when the winding shaft 17 moves while rotating on the opening portion of the air passage 15, the length of the film-like member from the fixing portion 27 changes, and the air passage 15 is moved. Can be opened and closed. Therefore, there is an advantage that no sliding friction occurs between the film-like member 16a and the surface of the air conditioning case 11.

  According to the second embodiment, the take-up shaft 17 is moved on the air passage 15 by moving while the take-up shaft 17 is rotated, but the end of the film-like member 16a and the take-up shaft 17 As for the fixing structure, the same structure as that of the first embodiment can be adopted.

  The mechanism for moving the take-up shaft 17 while rotating it is not limited to the worm gear mechanism, and can be configured using a geared belt or the like and can be variously modified.

(Other embodiments)
In the above-described embodiment, the case where an actuator composed of a servo motor is used as a driving unit for the film-like member 16a has been described. However, manual operation such as a dial and a lever provided in the air conditioning control panel and manually operated by an occupant. The operation mechanism may be connected to the winding shafts 17 and 18 via an appropriate connection mechanism, and the film-like member 16a may be driven by this manual operation mechanism.

  Moreover, although the above-mentioned embodiment demonstrated the example which applies this invention to the air mix door 16 in the air conditioning unit 10 of a vehicle air conditioner, this invention is applied to the blowing mode door etc. which open and close the blowing opening part in the air conditioning unit 10. May be applied.

  Furthermore, the present invention is not limited to the air passage opening and closing device in the air conditioning unit 10 of the vehicle air conditioning device, but can be applied to other air passage opening and closing devices for other purposes.

It is principal part sectional drawing of the air conditioning unit of the vehicle air conditioner to which this invention is applied. The winding shaft in 1st Embodiment of this invention is shown, (a) is a top view, (b) is a front view, (c) is a right view, (d) is AA cross section of (b). (E) is a BB cross-sectional view of (b), and (f) is a CC cross-sectional view of (b). It is a top view of the edge part of the film-shaped member in 1st Embodiment of this invention. (A)-(c) is a principal part top view explaining the fixing operation | work of the edge part of the film-shaped member in 1st Embodiment of this invention. (A)-(c) is a principal part perspective view explaining the fixing operation | work of the edge part of the film-shaped member in 1st Embodiment of this invention. It is principal part sectional drawing which shows the film-shaped member operation mechanism in 2nd Embodiment of this invention. It is a typical perspective view of the principal part which shows the film-shaped member operation mechanism in 2nd Embodiment of this invention.

Explanation of symbols

11 ... Air conditioning case, 14a ... Heater core side air passage, 15 ... Cold air bypass passage,
16 ... Air mix door, 16a ... Membrane member, 17, 18 ... Winding shaft,
20 ... slit groove, 21 ... locking claw, 23 ... groove, 24 ... split end, 25 ... locking hole.

Claims (6)

A film-like member (16a) disposed in the air passage (14a, 15);
A winding shaft (17, 18) to which an end (24) of the membrane member (16a) is fixed,
Opening and closing the air passage that opens and closes the air passage (14a, 15) by the film-like member (16a) by winding and rewinding the film-like member (16a) by the winding shaft (17, 18). In the device
The winding shaft (17, 18) is provided with an axially extending slit groove (20) into which the end portion (24) of the film-like member (16a) can be inserted, and is associated with the slit groove (20). A pawl (21) is provided,
The slit groove (20) has a slit-shaped portion (20a, 20b) having a predetermined height (H1) into which the end portion (24) of the film-like member (16a) is inserted,
The height (H2) of the locking claw portion (21) is larger than the height (H1) of the slit-shaped portions (20a, 20b),
Furthermore, a gap portion (20c) higher than the height (H1) of the locking claw portion (21) is formed around the arrangement site of the locking claw portion (21),
On the other hand, the end (24) of the membrane member (16a) is provided with a locking hole (25) that can be fitted into the locking claw (21),
By inserting the end (24) of the membrane member (16a) into the slit groove (20), the locking claw (21) and the locking hole (25) are fitted and locked. An air passage opening and closing device characterized in that it is configured as described above. The slit-shaped portions (20a, 20b) are arranged on the left and right sides along the axial direction of the winding shaft (17, 18), and the locking claws are provided between the slit-shaped portions (20a, 20b) on both the left and right sides. The air passage opening and closing device according to claim 1 , wherein a portion (21) and the gap (20c) are arranged. The air passage opening and closing device according to claim 2 , wherein the gap is formed by a central opening (20c) positioned between the slit-shaped portions (20a, 20b) on both the left and right sides. The said latching claw part (21) was made to incline so that the front-end | tip part of the said latching claw part (21) may be located in the back | inner side of the said slit groove (20) rather than a root part. 4. The air passage opening and closing device according to any one of 3 to 3 . The air according to any one of claims 1 to 4 , wherein the locking claw portion (21) is formed in a trapezoidal shape in which the width dimension of the root portion is larger than the width dimension of the tip portion. Passage opening and closing device. The end portion is a divided end portion (24) divided into a plurality of portions in the axial direction of the winding shaft (17, 18), and a groove (23) is provided between the plurality of divided end portions (24). Forming,
On the other hand, the winding shaft (17, 18) is provided with a plurality of slit grooves (20) and a plurality of locking claws (21) corresponding to the plurality of divided ends (24),
Further, a cylindrical portion (22) is formed on the winding shaft (17, 18) corresponding to the groove (23) between the plurality of divided end portions (24),
The air passage according to any one of claims 1 to 5 , wherein a groove (23) between the plurality of divided end portions (24) is fitted into the cylindrical portion (22). Switchgear.

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