JP4083945B2 - Sliding door device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sliding door device, for example, a sliding door device used in an air conditioning unit of an automobile.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a vehicle air conditioning unit in which a cooling heat exchanger, a heating heat exchanger, and a blower are integrated, arranged at the rear in the engine room and in the center in the vehicle width direction at the front of the vehicle interior. As such an air conditioning unit for a vehicle, one disclosed in Japanese Patent Application Laid-Open No. 11-254942 is known.
[0003]
In this vehicle air conditioning unit, air blown from the blower is passed through a cooling heat exchanger, and air distribution is controlled by an air mix door. In this air mix door, the ratio of the amount of air that passes the air cooled by the cooling heat exchanger directly to the bypass passage and the amount of air that passes the air cooled by the cooling heat exchanger to the heating heat exchanger side Is controlling. The air that has passed through the heat exchanger for heating is recombined and mixed in the air mix chamber together with the air that has been heated and sent to the bypass passage, and is mixed and harmonized to a predetermined blowing temperature. The air that has been harmonized here rises along the wall surface of the unit case on the passenger compartment side, and then blows into the passenger compartment from the vent outlet, defroster outlet, or foot outlet, which are indoor outlets. Yes.
[0004]
The air mix door is a slide door that is slidable laterally with respect to the guide rail, and is curved and formed so as to bulge toward the downstream side of the cold air that has passed through the cooling heat exchanger. By using such a slide door, the air mix door can be made compact, and the air that has passed through the cooling heat exchanger can be smoothly circulated to the bypass passage side or to the heating heat exchanger. Therefore, there is an advantage of reducing the ventilation resistance.
[0005]
[Problems to be solved by the invention]
In the above-described vehicle air conditioning unit, in combination with the demand for compactness, there is a demand for improving the assembling property of each component. In particular, air mix doors composed of sliding doors must be able to smoothly move relative to the guide rail and sliding doors, and must be able to smoothly transmit the sliding drive force. In addition to the characteristics, it is necessary to be able to perform a reliable slide operation. Such a situation is not limited to the vehicle air conditioning unit, and the same applies to various devices that require a sliding door.
[0006]
Therefore, the present invention has been made in view of such circumstances, and an object thereof is to provide a sliding door device capable of a smooth sliding operation.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, a frame in which an opening is formed, and a slide pin that is disposed along one side surface of the frame and slides along a slide guide groove formed in the frame are projected. A sliding door device comprising a sliding plate,
Rack teeth are formed on the slide plate, and by rotating and driving a gear meshing with the rack teeth, the slide plate moves relative to the frame, and the slit is orthogonal to the height direction of the rack teeth. It is formed in the direction.
[0010]
Therefore, in the invention according to claim 1 , since the slit is formed in the slide pin in a direction orthogonal to the height direction of the rack teeth, the rack teeth are increased in the height direction depending on the meshing state of the gear and the rack teeth. Even when the slide pin moves, the slide pin can bend in the height direction of the rack teeth, so that the meshing between the gear and the rack teeth can be suppressed, and the tooth portion can be prevented from being damaged.
[0011]
請 Motomeko 2 the described invention, a sliding door device according to claim 1 or claim 2, characterized in that said frame and said slide pin is formed of different materials to reduce the frictional resistance with each other .
[0012]
Therefore, in the invention described in claim 2 , since the frame in which the slide guide groove is formed and the slide pin of the slide plate are formed of different materials that reduce frictional resistance, the slide pin is caught on the inner wall of the slide guide groove. Can be prevented, and smooth sliding operation is enabled. Further, the strength of the slide pin that comes into contact with the inner wall of the slide guide groove can be increased by selecting a material.
[0013]
【The invention's effect】
According to the first aspect of the invention, when an excessive force is applied to the slide pin toward the inner wall side of the slide guide groove, the contact pressure between the slide pin and the slide guide groove inner wall is reduced by bending the slide pin. Since the increase in frictional resistance can be suppressed by reducing, it is possible to smoothly slide the slide plate with respect to the frame, and there is an effect of preventing the generation of abnormal noise and the like.
[0014]
Further, since the slide pin can bend in the height direction of the rack teeth, it is possible to suppress the meshing between the gear and the rack teeth, and there is an effect of suppressing breakage of the tooth portion.
[0015]
According to the second aspect of the present invention, since the frame in which the slide guide groove is formed and the slide pin of the slide plate are formed of different materials that reduce frictional resistance, the slide pin is caught on the inner wall of the slide guide groove. Can be prevented, and a smooth slide operation can be performed. Further, the strength of the slide pin that comes into contact with the inner wall of the slide guide groove can be increased by selecting a material, which has the effect of improving the durability of the slide door device.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the details of the sliding door device according to the present invention will be described with reference to embodiments shown in the drawings. The sliding door device according to the present invention can be applied to places requiring various gate functions. In the present embodiment, this sliding door device will be described as applied to a vehicle air conditioning unit. Prior to the description of the configuration of the sliding door device of the present embodiment, the configuration of a vehicle air conditioning unit to which the sliding door device is applied will be described.
[0017]
In FIG. 1, the code | symbol 1 has shown the air conditioning unit for vehicles, and the code | symbol 2 has shown the unit case.
[0018]
The unit case 2 has a shape that can be separated left and right by a fastening screw or the like. 2 is a perspective view showing a half part of the unit case 2 separated into left and right, and FIG. 3 is a perspective view showing the external appearance of the vehicle air conditioning unit 1 as a whole. Inside the unit case 2, a blower 3 as a main component, an air conditioning passage 6 for guiding and guiding the air sent out from the blower 3 toward upper open ports 4 and 5 described later, and this A cooling heat exchanger (evaporator) 7 and a heating heat exchanger (heat core) 8 disposed in the air conditioning passage 6, and a cooling heat exchanger 7 disposed on the downstream side of the cooling heat exchanger 7. The sliding door device 9 through which air that has passed through the air passes without exception, the open / close door 10 disposed downstream of the cooling heat exchanger 7 and the heating heat exchanger 8, and the final portion of the air conditioning passage 6. The open / close door 11 is provided.
[0019]
The blower 3 is disposed in an arcuate housing 12 provided above the unit case 2 and is rotationally driven by a drive motor (not shown).
[0020]
The housing 12 is formed with an intake port 13 for taking air into the housing 12 and a blower port 15 by the rotation of the blower 3.
[0021]
The air conditioning passage 6 communicates with the air blowing port 15 of the housing 12 and guides the air that has been blown down from the air blowing port 15 to the engine room 16 and the descending passage 6A that guides the air that descends along the vehicle compartment 14 side. It consists of a U-turn passage 6B as a lower passage for making a U-turn, and a rising passage 6C for guiding the air that has been U-turned in the U-turn passage 6B toward the upper open ports 4 and 5.
[0022]
The descending passage 6A of the air conditioning passage 6 is formed so as to be surrounded by the case wall surface 2A of the unit case 2 on the passenger compartment side and the left and right side walls 17 and 17 (shown in FIGS. 2 and 3) of the unit case 2. . The U-turn passage 6 </ b> B is formed so as to be surrounded by the case bottom wall surface 2 </ b> B of the unit case 2 and the left and right side walls 17, 17. The ascending passage 6C is formed so as to be surrounded by the case wall surface 2C of the unit case 2 on the engine room 16 side, the left and right side walls 17 and 17, and the back surface of the housing 12 formed in an arc shape.
[0023]
The cooling heat exchanger 7 and the heating heat exchanger 8 are disposed in the descending passage 6A and the U-turn passage 6B of the air conditioning passage 6, and the cooling heat exchanger 7 is heated upstream and downstream thereof. Heat exchangers 8 are provided respectively.
[0024]
The cooling heat exchanger 7 includes a refrigerant pipe through which a refrigerant flows and a large number of fins (all not shown). The cooling heat exchanger 7 is supported by upper and lower support brackets 18 and 18 provided in the unit case 2 as shown in FIG.
[0025]
The cooling heat exchanger 7 communicates with a compressor, a condenser, and an expansion valve (not shown), and the refrigerant discharged from the compressor passes through the condenser and the expansion valve, and serves as an evaporator. 7 constitutes a refrigeration cycle returning to the compressor again.
[0026]
As shown in FIG. 1, the heating heat exchanger 8 is located below a straight line connecting the lower end portion of the air blowing region of the cooling heat exchanger 7 and the pivot shaft 10 </ b> A of the open / close door 10, and is substantially horizontal. It arrange | positions so that it may take a proper attitude | position, and is supported by the support brackets 19 and 19 before and behind. More specifically, the heating heat exchanger 8 is located below a straight line connecting the upper end of the slide plate 21 and the pivot shaft 10A of the open / close door 10 when the slide door device 9 described later is in the full cool mode. Is arranged. The posture angle of the heat exchanger 8 for heating is desirably an angle where the upstream side rises about 10 degrees from the substantially horizontal direction. By adopting such an attitude, the cooling heat exchanger 7 and the heating heat exchanger 8 have a substantially horizontal T-shaped layout structure as shown in FIG. The shape is suppressed.
[0027]
The heating heat exchanger 8 is configured such that heated water heated by an engine (not shown) flows, and heat is exchanged and heated when air passes through the heat exchanger body. It has become.
[0028]
Next, the configuration of the sliding door device 9 according to the present embodiment will be described with reference to FIGS. As shown in FIG. 5, the slide door device 9 includes a frame 20 made of substantially rectangular polypropylene (PP), a slide plate 21 slidable on the frame 20, a drive shaft 22, and the drive shaft 22. Rotation driving means (not shown) for driving.
[0029]
As shown in FIG. 4, the frame 20 includes a pair of frame side plate portions 23 and 23 formed by arcs and strings shaped like a circle cut by a string. The frame side plate portions 23 and 23 have a width. They are disposed opposite to each other in the direction w. A bearing opening 23 </ b> A is formed in the center of each frame side plate portion 23. A pair of substantially arc-shaped slide guide grooves (cam grooves) 23B and 23B are formed along the arc-shaped edges on the mutually opposing surfaces of the frame side plate portions 23 and 23, respectively. The pair of slide guide grooves 23 </ b> B and 23 </ b> B are formed along the arcuate edges as described above, and are separated at the center of the frame side plate portion 23. Furthermore, slide pin insertion grooves 23C, 23C that are parallel to each other across the bearing opening 23A and communicate with the slide guide grooves 23B, 23B are formed on the opposing surfaces of the frame side plates 23, 23, respectively. ing. The slide pin insertion groove 23 </ b> C inserts a slide pin 29 of the slide plate 21, which will be described later, and moves laterally along the slide guide groove 23 </ b> B so that the slide plate 21 overlaps the curved inner surface of the frame 20. Makes it possible to attach to. The slide pin 29 is made of polyacetal (POM).
[0030]
The distance dimension between these frame side plate portions 23 and 23 is set to be substantially the same as the width dimension of the air passage region of the cooling heat exchanger 7. The opposite ends of the frame side plates 23 and 23 are connected by frame lateral frame portions 24 and 24, respectively. In addition, guide plate portions 25 and 25 are formed along the arc-shaped edge portions of the frame side plate portions 23 and 23 so as to extend from the edge portions toward the opposite inner side with a predetermined width. Further, the central portions in the width direction w of the frame lateral frame portions 24, 24 are connected by a central guide plate portion 26 that is curved similarly to the guide plate portion 25. Further, the central portions of the guide plate portions 25, 25 and the central guide plate portion 26 in the vertical direction h (indicated by arrows in FIG. 4) are connected by a reinforcing horizontal plate portion 27. As a result, the curved opening surface surrounded by the frame horizontal frame portions 24 and 24 and the guide plate portions 25 and 25 is divided into a cross shape by the central guide plate portion 26 and the reinforcing horizontal plate portion 27. Thus, two upper openings 28A, 28A located on the upper side of the frame 20 and two lower openings 28B, 28B located on the lower side of the frame 20 are formed.
[0031]
The slide plate 21 is a rectangular plate that is curved similarly to the degree of curvature of the curved opening surface of the frame 20 described above, and is arranged inside the curved opening surface of the frame 20. Further, slide pins 29 projecting outward in the width direction w are integrally formed at both upper and lower ends of both side edges in the width direction w of the slide plate 21. Each slide pin 29 is easily bent to reduce frictional resistance so that noise is not generated due to frictional resistance when sliding on the inner wall of the slide guide groove 23B of the frame side plate portion 23. A slit 29A for this purpose is formed. The slits 29A are formed in a direction orthogonal to the height direction of the rack teeth 30 described later. For this reason, when a gear portion 32F, which will be described later, meshes with the rack teeth 30 and rotates, even if the slide pin 29 is pressed toward the inner wall of the slide guide groove 23B, it bends, so the reaction force received from the inner wall is reduced. As a result, the frictional resistance can be reduced.
[0032]
In addition, rack teeth 30 are engraved along the side edges on the curved inner side surfaces of both side edges in the width direction w of the slide plate 21. A gear defining rib 42 is provided along the vertical direction h at an inner position in the width direction w of the row of rack teeth 30 on the slide plate 21. In addition, a positioning notch 42A used for alignment between a rotating cylinder 32 and a bearing opening 23A, which will be described later, is formed at the center of the gear defining rib 42. The dimension of the slide plate 21 in the width direction w is set substantially the same as the distance between the pair of frame side plate portions 23 and 23 of the frame 20. The dimension of the slide plate 21 in the vertical direction h is set slightly longer than half of the guide plate portion 25 of the frame 20, and when the slide plate 21 is attached to the frame 20, the pair of upper opening portions 28 </ b> A. , 28A and a pair of lower openings 28B, 28B are set so that either one of them can be completely closed or opened.
[0033]
The drive shaft 22 is set to have substantially the same length as the length dimension of the slide plate 21 in the width direction w. At both ends of the drive shaft 22, rotating cylinders 32 each having a gear portion 32F having a pinion gear 31 formed on the outer periphery are mounted. A cylindrical shaft 32A having a diameter smaller than that of the pinion gear 31 is coaxially provided on the outer side of the gear portion 32F of the rotating cylindrical body 32 (in the opposite outer direction when the pair of rotating cylindrical bodies 32 and 32 are opposed to each other). Has been. The cylindrical shaft 32 </ b> A is rotatably supported by a bearing opening 23 </ b> A provided at the center of the frame side plate portion 23 of the frame 20. Further, on the end surface of the cylindrical shaft 32A, a connecting concave groove 32B is formed which is connected to a rotation driving means side (not shown) and is used for transmission of rotational driving force.
[0034]
FIG. 5 is a perspective view showing a state in which the slide door device 9 is configured by assembling the frame 20, the slide plate 21, and the drive shaft 22. FIG. 6 is a cross-sectional view showing a state in which the slide door device 9 is cut along the drive shaft 22 at the center of the frame 20 and the slide plate 21. FIG. 7 is a cross-sectional view taken along the line AA of FIG. 6 and 7 show a state in which the slide plate 21 is positioned at an intermediate position with respect to the frame 20.
[0035]
As shown in FIGS. 1 and 2, the sliding door device 9 having the above-described configuration is a door formed integrally with support brackets 18 and 18 in the unit case 2 for mounting the cooling heat exchanger 7. It is attached to the support brackets 33 and 33. Since the slide door device 9 in the present embodiment has a compact structure in which the frame 20, the slide plate 21, the drive shaft 22, and the rotary cylinder 32 are assembled as described above, it is easily mounted on the door support brackets 33 and 33. can do. The sliding door device 9 is arranged and mounted so that the curved and protruding side faces the downstream side, and the upper openings 28A and 28A are located on the upper side and the lower openings 28B and 28B are located on the lower side. . In the state where the slide door device 9 is mounted in the unit case 2 in this manner, the rotation transmission connecting portion on the rotation driving means side (not shown) is connected to the connecting groove 32B of the rotating cylinder 32 mounted on the end of the driving shaft 22. Are connected, and the rotating cylinder 32 can be rotated by controlling the rotation driving means.
[0036]
By the way, the upper open ports 4 and 5 are concentrated on the case wall surface 2C on the engine room 16 side and the upper wall surface 2D continuing from the case wall surface 2C. The upper opening 5 provided in the upper wall surface 2D is a vent port, and the upper opening 4 provided in the case wall surface 2C on the engine room 16 side is a defroster port. An open / close door 11 is provided between the upper open ports 4 and 5 to switch and control the upper open ports 4 and 5 alternately.
[0037]
Further, as shown in FIG. 6, a ventilator duct 34 having indoor air outlets 34C, 34L, and 34R on both the left and right sides is connected to the upper opening 5 serving as a vent. As shown in FIG. 1, since the distance from the upper opening 5 to each of the indoor outlets 34C, 34L, 34R, particularly the distance to the indoor outlet 34C, can be relatively long, It is possible to flow air almost uniformly toward the outlets 34C, 34L, 34R. On the other hand, a defroster duct 36 for blowing air toward the windshield 35 is connected to the upper opening 4 serving as a defroster port.
[0038]
Furthermore, in FIG. 1, the code | symbol 37 has shown the foot mouth as a foot blowing channel | path entrance which sends air to a step | base, and the code | symbol 38 has shown the drain pool. The foot opening 37 is controlled to be opened and closed by the opening / closing door 10. The drain reservoir 38 is partitioned by a partition plate 39 and has a structure that is not directly affected by the air passing through the cooling heat exchanger 7. A drain port (not shown) is provided at the bottom of the drain reservoir 38.
[0039]
In the vehicle air conditioning unit 1 configured as described above, the air blown out from the blower 3 passes through the cooling heat exchanger 7 and the heating heat exchanger 8 and is cooled or heated. Mix in the air mix chamber shown at 40 and harmonize. The conditioned air is blown out into the passenger compartment 14 by controlling the opening and closing of the doors 10 and 11.
[0040]
In these series of operations, in the case of ventilator blowing, the conditioned air flows along the rear surface of the arcuate (curved surface) housing 12 when rising along the rising passage 6C on the engine room 16 side, A smooth flow toward the outlets 34C, 34L, 34R is obtained. Moreover, as a result of ensuring a long run-up distance of air to the air outlet 34C for the room, a continuous smooth flow having a low airflow resistance can be created as shown by an arrow a in FIG. Air can be blown out from the air outlets 34C, 34L, 34R substantially evenly.
[0041]
Further, since the opening / closing door 11 is located on the engine room 16 side, there is an advantage that the opening / closing sound transmitted to the vehicle interior 14 is reduced. In addition, as shown in FIG. 1, the vehicle air conditioning unit 1 can be assembled to the steering fixing member 41 in advance using the steering fixing member 41. In this case, since the casing 14 side of the unit case 2 is supported by the steering fixing member 41, the mounting portion of the opening / closing door 11 is far from the supporting point, and the opening / closing door is open even if the unit case 2 near the supporting point is distorted. The influence of the distortion is hardly transmitted to 11, and the smooth operation of the open / close door 11 can be maintained.
[0042]
In this embodiment, since the slit 29A is formed in the slide pin 29, when the slide pin 29 slides and moves along the inner wall of the slide guide groove 23B of the frame side plate portion 23, the slide pin 29 is orthogonal to the slide direction. When the stress is applied in the direction, the pin portion sandwiching the slit 29A bends to reduce the frictional resistance, so that the slide pin 29 can smoothly move in the slide guide groove 23B. For this reason, when the slide plate 21 performs the opening / closing operation, it is possible to continuously perform a good operation without generating abnormal noise.
[0043]
Further, since the slit 29A is formed in the slide pin 29 as shown in FIG. 8, when the slide plate 21 moves to the end of the frame 20, the slide pin 29 is moved in the sliding direction of the end portion of the slide guide groove 23B. When a stress pressing in the orthogonal direction is generated, a reaction force in the direction indicated by the thick arrow in FIG. 3 is received. However, the slide pin 29 is bent and the slide pin 29 comes into contact with the inner wall of the slide guide groove 23B with the repulsive force. Can be brought into close contact with the frame 20 without difficulty.
[0044]
As described above, the sliding door device 9 according to the present invention has been described as applied to an air conditioning unit for a vehicle. However, the present invention can be modified in various ways accompanying the gist of the configuration. For example, in the above-described embodiment, the frame 20 and the slide plate 21 constituting the slide door device 9 are curved so as to bulge to the downstream side, but it goes without saying that a flat frame or slide plate may be used. Is possible.
[0045]
In the above-described embodiment, the frame 20 is configured to include four openings, that is, the pair of upper openings 28A and 28A and the pair of lower openings 28B and 28B. However, the number of openings is set as appropriate. Can do. In the above-described embodiment, the guide plate portion 25 and the central guide plate portion 26 are formed on the frame 20, but the present invention is not limited to this.
[0046]
Furthermore, in the above-described embodiment, the frame 20 is formed of polypropylene (PP) and the slide pin 29 is formed of polyacetal (POM). However, the present invention is not limited to this, and the frame 20 and the slide pin 29 are mutually connected. Various materials can be selected as long as the frictional resistance can be reduced.
[0047]
And it goes without saying that the sliding door device 9 according to the present invention can be applied to various devices that require an opening / closing function, such as a blowing introduction device other than the vehicle air conditioning unit 1.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a vehicle air conditioning unit showing an embodiment of a sliding door device according to the present invention.
FIG. 2 is a perspective view showing a half part of a unit case used in the embodiment.
FIG. 3 is a perspective view of a vehicle air conditioning unit to which the sliding door device of the embodiment is applied.
FIG. 4 is an exploded perspective view of the slide door device used in the embodiment.
FIG. 5 is a perspective view of a slide door device used in the embodiment.
FIG. 6 is a cross-sectional view showing a state in which the slide door device of the embodiment is cut at the center in the height direction.
7 is a cross-sectional view taken along the line AA in FIG.
FIG. 8 is an explanatory diagram of a main part of the sliding door device according to the embodiment.
[Explanation of symbols]
9 Slide door device 20 Frame 21 Slide plate 23B Slide guide groove 28A Upper opening 28B Lower opening 29 Slide pin 29A Slit 30 Rack tooth 31 Pinion gear 32F Gear part

Claims (2)

A frame (20) in which openings (28A, 28A, 28B, 28B) are formed, and a slide guide groove (23B) arranged along one side of the frame (20) and formed in the frame (20) A slide door device (9) comprising a slide plate (21) projecting along a slide pin 29 that slides along
Rack teeth (30) are formed on the slide plate (21), and the slide plate (21) is moved relative to the frame (20) by rotationally driving a gear (32F) meshing with the rack teeth (30). The sliding door device (9) is characterized in that the slit (29A) is formed in a direction perpendicular to the height direction of the rack teeth (30) while being relatively moved. A sliding door device (9) according to claim 1,
  The slide door device (9), wherein the frame (20) and the slide pin (29) are formed of different materials that reduce frictional resistance.

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