JP2002127735A - Pipe fixing structure of air-conditioning unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe fixing structure of an air-conditioning unit excellent in fitting properties at a low cost. SOLUTION: In a pipe fixing structure for mounting pipes 4, 5 introduced to the outside from within the unit case 2 of an air-conditioning unit 1 on a mounting arm 6, and engaging a pipe fixing arm 21 with the mounting arm 6, an engaging hole 13 is formed at the tip end of the mounting arm 6, a rotational shaft hole 16 is formed at the base side of the mounting arm 6, a rotational shaft 22 installed rotatably in the rotational shaft hole 16 is projectingly provided toward the lateral side at an end of the pipe fixing arm 21, and a lock piece 23 which is inserted into the engaging hole 13 to be locked is formed at the end of the pipe fixing arm 21. Thus, components for fastening such as screws can be omitted, and the pipes can be easily fixed only by the rotational movement of the pipe fixing arm 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pipe fixing structure for an air conditioning unit.

[0002]

2. Description of the Related Art Conventionally, in an air conditioner unit, a cooling heat exchanger, a heating heat exchanger, various doors for controlling an air flow, and the like are housed in a unit case. A pair of hot water pipes is connected to the heat exchanger for heating so that hot water circulates. These hot water pipes are led out of the unit case and connected to a heating means side for supplying hot water. In an in-vehicle air conditioning unit, a hot water pipe is guided to the engine room through an instrument panel, and water heated by the engine flows through the hot water panel. In order to hold these hot water pipes in the unit case, a method of holding the hot water pipe on the outside of the unit case from the left or right or up and down with a pair of pipe fixing parts and screwing the pipe fixing parts together with screws is used. Is being done.

[0003] In technical fields other than the air conditioning unit, a structure for fixing a long member is disclosed in Japanese Utility Model Application Laid-Open Publication No.
A cable holding structure described in Japanese Patent No. 12877 is known. This cable holding structure holds a cable by engaging a holding arm integrally formed with the base member with the base member.

[0004]

However, in the above-mentioned air conditioning unit, a screw such as a screw is required separately, and it is difficult to reduce the cost due to the cost required for the screw and the large number of assembly steps. Was. Further, in the above-described cable holding structure, since the holding arm is integrally formed with the base member and is engaged by elastic deformation of the holding arm, the structure of the base member is complicated, and the formation of the base member is complicated. Was difficult.

Accordingly, an object of the present invention is to provide a pipe fixing structure of an air conditioning unit which is low in cost and has good assembling properties.

[0006]

According to the first aspect of the present invention,
On the outer surface of the unit case of the air-conditioning unit, a mounting arm for mounting a pipe led out from the inside of the unit case to the outside is projected, and the pipe is mounted in a state where the pipe is mounted on the mounting arm. A pipe fixing structure for an air conditioning unit for engaging a fixed arm with the mounting arm, wherein an engaging hole is formed at a tip portion of the mounting arm and a base side of the mounting arm. A rotating shaft hole is provided,
A rotating shaft rotatably fitted to the rotating shaft hole is provided at one end of the pipe fixing arm so as to protrude laterally, and is inserted into the engaging hole at the other end of the pipe fixing arm. It is characterized in that a locking piece to be engaged is formed.

According to the first aspect of the present invention, by placing the pipe led out of the unit case on the mounting arm, the load on the pipe can be suppressed. Further, the pipe fixing arm can be rotated by inserting the rotation axis of the pipe fixing arm into the rotation shaft hole provided on the base side of the mounting arm. While the pipe is placed on the mounting arm, the pipe is clamped between the pipe fixing arm and the mounting arm, and the lock piece of the pipe fixing arm is engaged with the engagement hole of the mounting arm to make the pipe. Can be fixed. Therefore, the pipe can be fixed to the unit case only by inserting the rotation shaft of the pipe fixing arm into the rotation shaft hole and rotating the pipe fixing arm.

According to a second aspect of the present invention, a mounting arm for mounting a pipe extending from the inside of the unit case to the outside is protruded from an outer surface of the unit case of the air conditioner unit. A pipe fixing structure of an air conditioning unit that engages a pipe fixing arm with the mounting arm in a state where the pipe is mounted on the arm, wherein a lock piece is formed at a distal end of the mounting arm. A rotation shaft hole is provided on the base side of the mounting arm, and a rotation shaft rotatably fitted to the rotation shaft hole is protruded toward one side at one end of the pipe fixing arm. In addition, an engagement hole into which the lock piece is inserted and engaged is formed at the other end of the pipe fixing arm.

According to the second aspect of the present invention, by placing the pipe led out of the unit case on the mounting arm, it is possible to suppress the load on the pipe. Further, the pipe fixing arm can be rotated by inserting the rotation axis of the pipe fixing arm into the rotation shaft hole provided on the base side of the mounting arm. While the pipe is placed on the mounting arm, the pipe is clamped between the pipe fixing arm and the mounting arm, and the lock piece of the mounting arm is engaged with the engagement hole of the pipe fixing arm, thereby forming the pipe. Can be fixed. Therefore, the pipe can be fixed to the unit case only by inserting the rotation shaft of the pipe fixing arm into the rotation shaft hole and rotating the pipe fixing arm.

According to a third aspect of the present invention, there is provided a pipe fixing structure for an air conditioning unit according to the first or second aspect, wherein a rotation axis of the pipe fixing arm is perpendicular to the lock piece. It is characterized by being provided in.

The invention according to claim 3 having such a configuration is as follows.
The same operation and effect as those of the first and second aspects are obtained, and the rotation axis is orthogonal to the lock piece, so that the lock piece is provided on the inner wall of the engagement hole when the rotation shaft comes off from the rotation shaft hole. Contact is prevented.

According to a fourth aspect of the present invention, in the pipe fixing structure for an air conditioning unit according to the first or second aspect, the lock piece has resilience,
An engagement protrusion projecting outward is formed at the distal end, and an engagement guide slope and the engagement protrusion that guide the engagement protrusion while the lock piece is urged in the engagement hole. It is characterized in that an engaging step to be engaged is formed.

Therefore, according to the fourth aspect of the present invention, in addition to the effects of the first and second aspects of the present invention,
The engaging protrusion on the pipe fixing arm side slides on the engaging guide slope formed in the engaging hole on the mounting arm side to apply an urging force to the lock piece, and the engaging protrusion is formed on the engaging step. When it reaches, the engaging projection engages with the engaging step by the repulsive force of the lock piece. Therefore, the pipe can be easily and reliably fixed only by rotating the pipe fixing arm around the rotation axis.

Further, the invention according to claim 5 is the invention according to claim 1.
It is a pipe fixing structure of the air conditioning unit according to any one of claims 3 to 3, wherein a surface of the placing arm and the pipe fixing arm that abuts on the pipe,
A curved concave portion is formed along the outer peripheral surface of the pipe.

Therefore, according to the fifth aspect of the present invention, in addition to the effects of the first to third aspects of the present invention, by disposing the pipe in the curved concave portion of the mounting arm and the pipe fixing arm, It has the effect of preventing lateral displacement and vibration of the pipe.

[0016]

As is apparent from the above description, according to the first and second aspects of the present invention, the operation of inserting the rotary shaft of the pipe fixing arm into the rotary shaft hole and rotating the pipe fixing arm are performed. Since the pipe can be fixed to the unit case only by the operation of moving, the operation cost can be reduced. Further, since screws such as screws are not required as fixing means, cost reduction can be achieved.

According to the third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, the rotation shaft can be reliably prevented from coming out of the rotation shaft hole.

According to the fourth aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, the pipe fixing arm can be easily rotated only by rotating the pipe fixing arm around the rotation axis. There is an effect that the pipe can be securely fixed.

According to the invention described in claim 5, claims 1 to 5
In addition to the effect of the invention described in claim 3, by arranging the pipe in the curved concave portion of the mounting arm and the pipe fixing arm, there is an effect of preventing the pipe from laterally displacing and vibrating.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a pipe fixing structure of an air conditioning unit according to the present invention will be described below based on an embodiment shown in the drawings. In this embodiment, the present invention is applied to a vehicle-mounted air conditioning unit.

FIG. 1 is an exploded perspective view showing an air conditioning unit 1 having a pipe fixing structure according to the present embodiment.
In the air conditioning unit 1, a unit case 2 as a housing accommodates a cooling heat exchanger (not shown), a heating heat exchanger 3, various doors for controlling an air flow (not shown), and the like. ing.

A pair of hot water pipes 4 and 5 are connected to the side of the heating heat exchanger 3. These hot water pipes 4,
5 is led out from one side wall 2A in the vehicle width direction of the unit case 2 and bent in an L-shape toward the engine room side, penetrates an instrument panel (not shown), and is connected to the engine side. ing.

On the front side of the side wall 2A of the unit case 2 in the vehicle front-rear direction, a mounting arm for mounting the pair of hot water pipes 4 and 5 at a height approximately equal to that of the heating heat exchanger 3. 6 protrudes toward the side. The mounting arm 6 has a pipe mounting surface 7 for mounting the hot water pipes 4 and 5 on an upper surface of a portion protruding to the side of the unit case 2.
have. The pipe mounting surface 7 is formed with curved concave portions 8, 8 on which a pair of hot water pipes 4, 5 are mounted, respectively, and the pipe peripheral surfaces contact.

Also, as shown in FIG.
An engagement portion 10 located below the pipe mounting surface 7 via the step 9 is provided on the distal end side of the pipe mounting surface 7 in FIG. The engaging portion 10 has an engaging hole 13 penetrating vertically from the upper surface 11 to the lower surface 12. An engagement step 14 is formed on the front side of the inner surface of the engagement hole 13. Above the engagement step portion 14 is an engagement guide slope 14A for guiding an engagement protrusion 23A of the lock piece 23 described later.

Further, a step 15 is formed above a portion of the mounting arm 6 on the unit case 2 side. The step portion 15 is formed with a pivot shaft hole 16 that opens to the front side of the vehicle. The base 17 of the mounting arm 6 including the step 15 is formed integrally with the unit case 2. In addition, the code | symbol 18 in a figure is the base 17
Are reinforcing ribs formed integrally with the side and bottom surfaces of the unit case 2 and the outer side surface of the unit case 2. The mounting arm 6 is provided with a gap 19 over substantially the entirety of the grid-shaped rib 1.
9 is formed so as to surround it to reduce the weight without impairing the rigidity.

Next, the structure of the pipe fixing arm 21 will be described with reference to FIGS. 1, 3 and 4. FIG. FIG. 3 is a plan view of the pipe fixing arm 21 as viewed from the outside, and FIG.
Is a side view of the pipe fixing arm 21.

The pipe fixing arm 21 has a rotating shaft 22 protruding laterally at one end. The rotating shaft 22 is fitted in the rotating shaft hole 16 formed in the mounting arm 6 described above.

At the other end of the pipe fixing arm 21, a lock piece 23 having resilience protruding in the rotation direction is provided. An engagement projection 23 </ b> A projects outward from the distal end of the lock piece 23.

Further, between the one end and the other end of the pipe fixing arm 21, the surface on the side where the lock piece 23 protrudes is provided with a curved concave portion 24A which abuts on the peripheral surface of the hot water pipes 4, 5, respectively. 24B are formed. Note that the curved concave portion 24A that is drawn out of the heating heat exchanger 3 and covers the hot water pipe 4 having a longer distance to the mounting arm 6 depends on the length of the hot water pipe 4 to the mounting arm 6. It has a long groove length. On the other hand, the curved concave portion 24B which is drawn out of the heating heat exchanger 3 and covers the hot water pipe 5 having a shorter distance to the mounting arm 6 has a length corresponding to the length of the hot water pipe 5 to the mounting arm 6. It is set to a short groove length.

Further, in this embodiment, the hot water pipe 4
Is laid out on the high temperature side and the hot water pipe 5 is laid out on the low temperature side. Even if the occupant's legs touch the pipe, the pipe fixing arm 21 serves as a cover for covering the hot water pipes 4 and 5, thus protecting the occupant. And the pipe itself can be protected.

As shown in FIGS. 3 and 4, the pipe fixing arm 21 has an arm plate 25 integrally formed on one side in the width direction, so that the rigidity of the entire pipe fixing arm 21 is increased. The surface of the mounting arm 6 on the instrument panel side and the surface of the arm plate 25 are installed in a flat shape, and the air conditioning unit is attached to the instrument panel via grommets and seal packing. Further, as shown in FIGS. 3 and 4, a plurality of reinforcing ribs 26 are appropriately formed on the outer surface of the pipe fixing arm 21.

The structure for fixing the pipe of the air conditioner unit according to the present embodiment has been described above. Next, FIGS.
The procedure for assembling the pipe fixing arm 21 and the mounting arm 6 to fix the hot water pipes 4 and 5 will be described.

First, as shown in FIG.
The hot water pipes 4 and 5 are mounted on the pipe mounting surface 7 of. At this time, the lower portions of the peripheral surfaces of the hot water pipes 4 and 5 come into contact with the curved concave portions 8 and 8 shown in FIG.

Next, the rotating shaft 22 of the pipe fixing arm 21
Is inserted into the rotation shaft hole 16 of the mounting arm 6 and the pipe fixing arm 21 is rotated with the rotation shaft 22 as a fulcrum, and the mounting arm 6 and the pipe fixing arm 21 are rotated as shown by a dashed line in FIG. Then, the hot water pipes 4 and 5 are sandwiched.

Finally, the lock piece 23 of the pipe fixing arm 21 is inserted into the engaging hole 13 of the mounting arm 6. Then, the engagement protrusion 23A at the tip of the lock piece 23 slides on the engagement guide slope 14A of the engagement hole 13 and moves downward.
At this time, the lock piece 23 is bent while being urged inward (toward the rotation shaft) by the engagement guide slope 14A. When the engagement projection 23A reaches the engagement step 14, the engagement projection 2
3A, due to the repulsive force of the lock piece 23, the engaging projection 23A engages with the engaging step 14 as shown by a solid line in FIG.

As described above, in the pipe fixing structure of the air conditioning unit according to the present embodiment, the pipe fixing operation becomes extremely simple. Further, in the present embodiment, since the mounting arm 6 and the pipe fixing arm 21 do not need to be fixed with screws such as screws, it is possible to omit the screw cost and the operation cost required for screw fixing.

Although the embodiment has been described above, the present invention is not limited to this, and various changes accompanying the gist of the configuration are possible. For example, in the above embodiment, the hot water pipes 4 and 5 of the air conditioning unit are set to be fixed. However, the present invention can be applied to the case where other various pipes are fixed.

In the above-described embodiment, the lock piece 23 protrudes from the pipe fixing arm 21. Alternatively, the lock piece 23 may protrude from the mounting arm 6 so that the lock piece stands.
In the embodiment, the mounting arm 6 is formed integrally with the case, but may be attached to the case as a separate structure.

Further, in the above-described embodiment, the curved concave portion 8 is formed on the upper surface of the mounting arm 6. However, the curved concave portion 8 may be omitted by disposing a buffer member on the upper surface. Thus, the curved concave portion 8 may be omitted. In that case, by designing / managing the curved concave portions 24A and 24B of the pipe fixing arm 21 based on the diameter (φ) of the hot water pipe,
Prevents rattling of the pipe.

In the above-described embodiment, the rotary shaft hole 1
Although 6 is provided on the base 17 of the mounting arm 6, it may be provided directly on the unit case 2.

Further, the lock piece 2 of the pipe fixing arm 21
3 is designed so that even if the engaging projection 23A is damaged, it can be fixed to the hole 27A provided in the pipe fixing arm 21 and the hole 7B provided in the mounting arm 6 with screws.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a pipe fixing structure of an air conditioning unit according to the present invention.

FIG. 2 is a side view showing a mounting arm in the pipe fixing structure according to the embodiment.

FIG. 3 is a plan view of a pipe fixing arm in the pipe fixing structure of the embodiment.

FIG. 4 is a side view of a pipe fixing arm in the pipe fixing structure of the embodiment.

FIG. 5 is a side view showing the pipe fixing structure of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air conditioning unit 2 Unit case 4, 5 Hot water pipe 6 Mounting arm 7 Pipe mounting surface 8 Curved concave part 10 Engaging part 13 Engaging hole 14 Engaging step 14A Engaging guide slope 16 Rotating shaft hole 21 Pipe fixed Arm 22 Rotating shaft 23 Lock piece 23A Engagement protrusion

Claims (5)

[Claims] 1. A mounting arm (1) for mounting pipes (4, 5) led out from the inside of the unit case (2) to the outside on the outer surface of the unit case (2) of the air conditioning unit (1). 6) is protruded, and a pipe fixing arm (2) is set in a state where the pipes (4, 5) are mounted on the mounting arm (6).
1) A pipe fixing structure of an air conditioning unit (1) for engaging with the mounting arm (6), wherein an engaging hole (13) is formed at a tip end of the mounting arm (6). In addition, a rotation shaft hole (16) is provided on the base side of the mounting arm (6), and the pipe fixing arm (2) is provided.
A rotating shaft (22) rotatably fitted in the rotating shaft hole (16) is provided at one end of 1) so as to protrude laterally, and the other end of the pipe fixing arm (21) is provided at the other end. A pipe fixing structure for an air conditioning unit (1), wherein a lock piece (23) to be inserted into and engaged with an engagement hole (13) is formed. 2. A mounting arm (2) for mounting pipes (4, 5) led out of the unit case (2) to the outside on the outer surface of the unit case (2) of the air conditioning unit (1). 6) is protruded, and a pipe fixing arm (2) is set in a state where the pipes (4, 5) are mounted on the mounting arm (6).
1) A pipe fixing structure of an air conditioning unit (1) that engages with the placing arm (6), wherein a lock piece (23) is formed at a tip end of the placing arm (6). At the same time, a rotation shaft hole (16) is formed on the base side of the mounting arm (6).
Is disposed at one end of the pipe fixing arm (21).
A rotating shaft (22) rotatably fitted in the rotating shaft hole (16) is provided to project sideways, and the lock piece (23) is provided at the other end of the pipe fixing arm (21). A pipe fixing structure for an air conditioning unit (1), wherein an engagement hole (13) to be inserted and engaged is formed. 3. The pipe fixing structure of the air conditioning unit (1) according to claim 1, wherein a rotation shaft (22) of the pipe fixing arm (21) is fixed to the lock piece (23). The pipe fixing structure of the air conditioning unit (1), which is provided in a direction orthogonal to (1). 4. The pipe fixing structure for an air conditioner unit (1) according to claim 1, wherein the lock piece (23) has resilience and protrudes outward at a distal end portion. An engagement protrusion (23A) is formed, and an engagement guide slope (14A) for guiding the engagement protrusion (23A) while the lock piece (23) is urged in the engagement hole (13). ) And an engagement step (14) with which the engagement protrusion (23A) engages, and is formed in the pipe fixing structure of the air conditioning unit (1). 5. The pipe fixing structure of the air conditioning unit (1) according to claim 1, wherein the placing arm (6) and the pipe fixing arm (2) are provided.
A curved concave portion (8, 8) is formed on the surface in contact with the pipe (4, 5) in 1) along the outer peripheral surface of the pipe (4, 5).
24A, 24B) are formed, and the pipe fixing structure of the air-conditioning unit (1) is characterized in that: