JP3324457B2 - Air conditioner outdoor unit protection fence - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection fence for an outdoor unit that can be easily mounted on an air conditioner outdoor unit and that can be opened and closed.

[0002]

2. Description of the Related Art An air conditioner such as a cooling and heating unit includes an outdoor unit for exchanging heat of a refrigerant by condensation or the like, in addition to an indoor unit for circulating cool air or warm air inside a room. The outdoor unit is arranged along an outer wall such as a veranda, a balcony, or the like, and is covered with a fence for contact with foreign matter and protection from rainwater. Conventional stainless steel protection fences for outdoor units are often made of all stainless steel from the viewpoint of corrosion resistance. For example, as shown in FIG. 1, a wire mesh 2 is fixed to a four-sided frame 1 integrally welded with a stainless steel profile. And is fixedly arranged in the outdoor unit installation space A via the mounting frame 3.

The mounting frame 3 has a nut 4b, into which a mounting bolt 4a is screwed, fixed to the vicinity of the upper end, and a bracket 5 to which a nut (not shown) is welded to the back surface is fixed to the vicinity of the lower end. The mounting frame 3 includes a nut 6b and a hole anchor 6a embedded in a side wall that defines the outdoor unit installation space A.
Is fixed to the side wall by screwing. A bolt hole 4c into which the mounting bolt 4a is inserted is formed in the four-sided frame 1 near the upper end of the side frame. An oval hole 7b into which a fixing bolt 7a is inserted is formed at a position corresponding to the bolt hole 7c provided in the bracket 5 of the mounting frame 3 near the lower end on the front side of the side frame. Also, the elliptical hole 7
A notch 8 is formed on the side of the square frame 1 at the same height as b.

When attaching a protective fence to an outdoor unit disposed in the outdoor unit installation space A, the bolt holes 4c of the four-sided frame 1 are aligned with the nuts 4b of the mounting frame 3, and the mounting bolts 4a are inserted into the bolt holes 4c. Into the nut 4b. Thus, the four-sided frame 1 having the upper portion fixed is rotated substantially vertically, and the elliptical hole 7b and the bolt hole 7c are aligned with the fingertip inserted from the notch 8. Next, the fixing bolt 7a is inserted into the elliptical hole 7b and the bolt hole 7c,
It is screwed into a nut (not shown) welded to the back side of the bracket 5.

[0005]

The protection fence made of all stainless steel is heavy, and a burden is imposed on handling and mounting work. Further, when the outdoor unit is inspected by removing the protective fence, it is necessary to remove all the bolts 4a, 4a, 7a, 7a on the upper, lower, left and right sides, and further remove the mounting frame 3. Therefore, the replacement work is troublesome and is not suitable for on-site work. Furthermore, since the lower part of the four-sided frame 1 is fixed to the mounting frame 3 in which the vicinity of the upper end is fixed and the lower end is free, the four-sided frame 1 is mounted in an unstable state. Moreover, as shown in FIG. 2, the wire mesh 2 is fixed to the frame 1a of the four-sided frame 1 by welding 9, so that
When the wire mesh 2 was damaged, only the wire mesh 2 could not be replaced on site. The present invention has been devised in order to solve such a problem. In addition to forming a frame from an extruded aluminum material having excellent lightness, a wire mesh is detachably incorporated, and a protective fence is provided so as to be openable and closable. Accordingly, it is an object of the present invention to provide a protective fence that is easy to handle and attach, is opened by a rotating operation, and facilitates inspection of an outdoor unit.

[0006]

SUMMARY OF THE INVENTION In order to attain the object, the protection fence for an outdoor unit of an air conditioner outdoor according to the present invention is an aluminum extrusion having an L-shaped cross section formed by integrally molding or combining a hollow front portion and a hollow side portion. Up and down and left and right frames that are made of shaped material and form a rectangular frame, a net that is stretched in a rectangular internal space defined by each frame, and edges of four sides of the net are An L-shape in which an upper piece is fixed to a pressing bracket for pressing the rear surface to fix the net body and an anchor embedded in the ceiling wall of the outdoor unit installation space, and a bolt insertion hole is formed in a vertical piece orthogonal to the upper piece. A mounting bracket, a bolt having a sliding portion disposed in a bolt insertion hole of the mounting bracket, a bolt having a tip fixed to a receiving portion provided near an upper portion of the left and right frames, and embedded in a side wall of the outdoor unit installation space. The side piece is fixed to the anchor A back plate forming a bolt accommodating space is fixed to the back piece orthogonal to the side piece, and an elongated hole extending in the horizontal direction is formed in the back piece and the back plate. Equipped with a fixing bolt inserted into a bolt insertion hole formed to penetrate in the depth direction of the left and right frames, and a nut that can move horizontally along the long hole of the fixing bracket and into which the shaft of the fixing bolt is screwed. It is characterized by having.

For large size protective fences,
It is also possible to extend a reinforcement frame in the middle part. The reinforcing frame is formed of an extruded aluminum member having a T-shaped cross section consisting of a hollow front portion and a hollow rear portion, and the left and right edges of the net are formed between the rear surface of the hollow front portion and the pressing piece of the pressing fitting. It is pinched. The pressing metal fitting for fixing the mesh body includes a pressing piece facing the rear surface of the hollow front part of the frame, and a mounting piece that stands obliquely from the pressing piece so as to approach the side surface of the hollow side part or the hollow rear part, A plurality of screw insertion holes for inserting screws to be screwed into the inner side surface of the hollow side portion of the upper, lower, left and right frames or the side surface of the hollow rear portion of the reinforcing frame are formed at appropriate intervals along the longitudinal direction of the mounting piece. .

The stepped bolt for mounting the upper part of the protective fence to the ceiling wall of the outdoor unit installation space is provided with a screw part screwed into the receiving nut, a sliding part housed in the bolt insertion hole, and a vertical piece of the mounting bracket. And the sliding portion is rotatable in the bolt insertion hole in a state where the screw portion is screwed into the receiving nut. Instead of the stepped bolt, a bolt fixed to the left and right frames by a retaining ring can be used. In this case, the bolt is a grooved shaft portion that is inserted into the receiving portion of the left and right frames through the bolt insertion hole of the mounting bracket, a large diameter portion facing the vertical piece of the mounting bracket from the outside, and a tip of the grooved shaft portion. A retaining ring has a groove formed in the vicinity and is fitted into a groove facing the inside of the left and right frames from the receiving portion. The lower part of the protective fence, whose upper part is attached to the ceiling wall of the outdoor unit installation space, is fixed by a fixing bracket in a positional relationship according to the shape of the outdoor unit installation space. The fixing bracket is sandwiched between the back piece and the back plate, and accommodates a nut having a base having a diameter larger than the height of the long hole in the bolt housing space, and a shaft portion facing the back side from the long hole is formed. Standing from the base.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A protection fence for an outdoor unit according to the present invention is provided in an outdoor unit installation space A where an outdoor unit B is arranged as shown in FIG. The protective fence consists of upper and lower frames 10, 20 and left and right frames 30, 4
0 and a rectangular shape having an area corresponding to the front surface of the outdoor unit B. In a large-area protection fence, a reinforcing frame 50 may be extended as needed between the upper frame 10 and the lower frame 20. Each frame 1
Nos. 0 to 50 are made of extruded aluminum hollow members excellent in light weight, corrosion resistance, durability and strength. Each frame 10
A net body is attached to the internal space defined by ５０50. As the net, a net made of a synthetic resin such as the wire net 60, a perforated plate, a punched metal, a lattice, or the like can be used, but the wire net 60 is represented in the following description. As shown in FIG. 4, the upper and lower frames 10, 20 are integrally formed with hollow front portions 11, 21, which cover the front surface of the edge of the wire mesh 60, and hollow side portions 12, 22, which form the upper and lower surfaces of the protective fence.
Screw pockets 13, 14, 23, 24 are formed inside the hollow. Individually extruded hollow front portions 11,2
The upper and lower frames 10 and 20 may be formed by combining the first and hollow side portions 12 and 22.

As shown in FIG. 5, the left and right frames 30, 40 have hollow front portions 31, 41 for covering the front surface of the edge of the wire mesh 60, and hollow side portions 32, 42 for forming the side surfaces of the protective fence.
Is integrally molded. As the left and right frames 30 and 40, a combination of individually hollow front portions 31 and 41 and hollow side portions 32 and 42 which are extruded can be used.
Screw holes (not shown) are formed at appropriate locations on the hollow side portions 32 and 42. Screw 33 inserted in screw hole
(FIG. 8) is the screw pocket 1 of the upper and lower frames 10 and 20.
The left and right frames 30 and 40 are connected to the upper and lower frames 10 and 20 by being screwed into 3, 14, 23 and 24. The reinforcing frame 50 also has a hollow front portion 51 covering the front surface of the edge of the wire mesh 60 and a hollow rear portion 52 for fixing the edge of the wire mesh 60, which are integrally formed or combined in a T-shape.
Screw pockets 53 and 54 are provided on the inner surface side of the hollow front part 51, and screws inserted through screw holes (not shown) formed at appropriate locations of the upper and lower frames 10 and 20 are screw pockets. When screwing into the 53 and 54, the reinforcing frame 50 is integrated with the upper and lower frames 10 and 20.

The wire mesh 60 stretched in the inner space defined by the frames 10 to 50 has hollow edges 11, 21, 31, 41, 51 at the respective edges by pressing metal fittings 70, 70.
Is pressed and fixed to the rear surface. The press fitting 70 is made of an extruded aluminum material and has a press piece 71 as shown in FIG.
And a mounting piece 72 that rises obliquely from above. The angle θ between the distal end of the pressing piece 71 and the mounting piece 72 is set to an obtuse angle (preferably 90 degrees <θ ≦ 120 degrees). The tip of the mounting piece 72 may be a biting portion 73 that is slightly inclined as necessary. The press fitting 70 is
It has a length corresponding to each side of the internal space defined by the frames 10 to 50, and has screw holes 74, 74 at appropriate intervals.
・ ・ Is formed. The base of the pressing piece 71 is preferably a rib 76 which is slightly thicker for reinforcement. Screw holes 74 into which the screws 75 are inserted and screw receiving holes (not shown) provided in the hollow side portions 12, 22, 32, 42 and the hollow rear portion 52 are hollow front portions 11 and 12, respectively.
The pressing pieces 71 are inclined so as to approach the rear faces of the hollow front portions 11, 21, 31, 41, 51 so that the pressing force of the pressing pieces 71 against the rear faces of the pressing pieces 71, 31, 41, 51 increases toward the distal end side of the pressing pieces 71. It is preferable to drill.

A method of fixing the upper edge portion 61 of the wire net 60 to the upper frame 10 will be described with reference to FIG. The upper edge 61 is applied to the rear surface of the hollow front portion 11, and the pressing piece 71 of the pressing fitting 70 is overlapped on the upper edge 61. Then, when the screw 75 inserted into the screw insertion hole 74 is screwed into the side wall of the hollow side portion 12, the mounting piece 72 is elastically deformed toward the side wall side of the hollow side portion 12 starting from the biting piece 73. Here, since the angle θ between the mounting piece 72 and the pressing piece 71 is an obtuse angle, the pressing piece 71 causes the upper edge portion 61 of the wire mesh 60 to move to the rear surface of the hollow front portion 11 due to the elasticity of the mounting piece 72. Press As a result, the upper edge portion 61 of the wire mesh 60 is elastically held between the pressing piece 71 and the rear surface of the hollow front portion 11. Similarly, the lower edge, the left edge, and the right edge of the wire mesh 60 are also pressed by the press fitting 70 to the rear surface of the hollow front portion 21 of the lower frame 20, the rear surface of the hollow front portion 31 of the left frame 30, and the hollow portion of the right frame 40. It is pressed and fixed to the rear surface of the front part 41, respectively. Moreover, in the one provided with the reinforcing frame 50,
The right and left edges of the wire gauze 60 are resiliently held between the rear surface of the hollow front part 61 and the pressing piece 71 by the same pressing metal fitting 70.

In this manner, four sides of each frame 10 to 10
The wire mesh 60 is firmly attached to the frames 10 to 50 because the wire mesh 60 is elastically pressed against the wire 50 and the elastic repulsive force of the wire mesh 60 itself also acts. Wire mesh 60 from frame 10-50
When removing the wire mesh 60, the wire mesh 60 can be easily separated from the frames 10 to 50 by loosening the screw 75 and removing the pressing metal fitting 70. The protection fence in which the wire mesh 60 is mounted on the frames 10 to 50 is mounted on a concrete wall which divides the outdoor unit installation space A with the mounting bracket 80. The mounting bracket 80 is L-shaped, and an upper piece 82 is screwed to an anchor 81 embedded in a concrete ceiling wall C as shown in FIG. The vertical piece 83 orthogonal to the upper piece 82 has a bolt insertion hole 84 near the lower part. A stepped bolt 85 is inserted into the bolt insertion hole 84.

The stepped bolt 85 has a head 85d on a shaft portion including a screw portion 85a, a sliding portion 85b, and a step portion 85c. A receiving nut 86 is fixed to the left and right frames 30 and 40 from the inside of the hollow portion at a position facing the bolt insertion hole 84 in a mounted state. Receiving nut 8
6 has a depth in which the screw portion 85a of the stepped bolt 85 is screwed and accommodated. When mounting the protective fence, the bolt insertion hole 84 of the mounting bracket 80 fixed to the ceiling wall C is aligned with the receiving nut 86, and a washer 87 is interposed between the mounting bracket 80 and the left and right frames 30 and 40. Then, the stepped bolt 85 is inserted into the bolt insertion hole 84, and the screw portion 85 a is received and screwed into the nut 86.
When the screw portion 85a is completely screwed into the receiving nut 86, the sliding portion 85b is located in the bolt insertion hole 84 as shown in FIG. Accordingly, the left and right frames 30 and 40 fixed to the mounting bracket 80 can be rotated by a bolt angle about the axis of the stepped bolt 85, and can be opened and closed as shown in FIG.

A mounting bracket 80 for opening and closing the protective fence.
As a means for attaching the bolts, a bolt provided with a grooved shaft as shown in FIG. 10 can be used in place of the stepped bolt 85. The bolt 88 has a groove 8 at the tip end 88a.
8b, and has a grooved shaft 88e in which a large diameter portion 88d larger than the bolt insertion hole 84 of the mounting bracket 80 is formed on the head 88c side. The overall length of the grooved shaft 88e is determined by the mounting bracket 80 and the left and right frames 30, 4
The groove 88b is inserted into the right and left frames 30, 4
0 is set inside. Large diameter part 88
The length of the grooved shaft 88e from d to the groove 88b is designed to be longer than the bolt insertion hole 84 formed in the vertical piece 83 of the mounting bracket 80. The bolt 88 is a stepped bolt 8
Similarly to 5, after the bolt is inserted through the bolt insertion hole 84 of the mounting bracket 80 into the receiving hole 89 of the left and right frames 30, 40, the retaining ring 88f is inserted into the groove 88b. In the inserted state, the peripheral surface of the grooved shaft 88e faces the inner peripheral surface of the bolt insertion hole 84 formed in the vertical piece 83 of the mounting bracket 80, and the left and right frames 30, 40 are rotatably connected to the mounting bracket 80. You.

The lower part of each side of the protective fence is provided with a fixing bracket 90.
Is fixed to the side wall D made of concrete. Fixture 90
Has an L shape, and as shown in FIG.
Is fixed. The back piece 93 orthogonal to the side piece 92 is shown in FIG.
The back plate 93a is fixed by welding or the like as shown in FIG. The back plate 93 a has a slightly raised central portion in the vertical direction, and forms a bolt housing space 93 b extending horizontally with the back piece 93. An elongated hole 93c extending in the horizontal direction is formed in the back piece 93 and the back plate 93a. Bolt accommodation space 93
b has a base 94a larger than the height of the elongated hole 93c, and a shaft 94b having a female screw formed on the inner peripheral surface rises from the base 94a and faces the inner side from the elongated hole 93c. In. Thereby, the nut 94 can move along the elongated hole 93c with the base 94a sandwiched between the back piece 93 and the back plate 93a.

Near the lower ends of the left and right frames 30, 40,
A bolt insertion hole 95 extending from the front to the back is formed (FIG. 11). The fixing bolt 96 inserted into the bolt insertion hole 95 has a shaft portion 96a longer than the depth of the left and right frames 30, 40, is inserted into the bolt insertion hole 95 with a washer 97 interposed, and is formed at the tip of the shaft portion 96a. The external thread is screwed into the nut 94. When the upper part of the protective fence is mounted on the ceiling wall C via the mounting bracket 80, the left and right frames 3 may be displaced due to misalignment at the time of building the house.
In many cases, 0 and 40 are not parallel to the side wall D. Therefore, if the screwing destination of the fixing bolt 96 is fixed,
The tip of the shaft of the fixing bolt 96 inserted through the left and right frames 30, 40 may not coincide with the receiving nut. In this regard, in the mounting structure according to the present invention, since the nut 94 is movable along the elongated hole 93c, the displacement is absorbed by the movement of the nut 94. That is, the left and right frames 3 of the protective fence whose upper side is attached to the ceiling wall C
The nut 94 is moved along the elongated hole 93c so that the nut 94 matches the position of the bolt insertion hole 95 formed near the lower ends of 0 and 40. In this state, the fixing bolt 96 is inserted into the bolt insertion hole 95, and the tip of the shaft portion 96a is screwed into the nut 94, thereby absorbing the displacement and fixing the lower portion of the protective fence to the side wall D.

As described above, the protective fence according to the present invention can be configured such that the upper and lower parts are the mounting bracket 80 and the fixing bracket 90 while absorbing the deviation of the building by easy on-site work.
And installed in the outdoor unit installation space A. For maintenance and inspection of the outdoor unit B, the fixing bolt 96 is removed from the front side. Thereby, the protection fence can be turned around the upper part as shown by the arrow in FIG. 3, and the outdoor unit B is opened in the turning state. Therefore, maintenance and maintenance of the outdoor unit B is performed without removing the protection fence itself.
You can check. When the wire mesh 60 is damaged, the wire mesh 60 is taken out from the frames 10 to 50 by releasing the engagement with the attachment metal fittings 80, removing the protective fence, loosening the screws 75 and removing the pressing metal fittings 70. Therefore,
The wire mesh is replaced with a new wire mesh 60, and the new wire mesh is fixed to the rear surfaces of the frames 10 to 50 with the press fitting 70.

[0019]

As described above, in the outdoor unit protection fence of the present invention, the net is removably attached to the rectangular frame formed by the upper, lower, left and right frames, so that the outdoor unit installation space is reduced. The upper part of the rectangular frame is rotatably connected to a mounting bracket fixed to an anchor embedded in the ceiling wall. Therefore, in maintenance and inspection of the outdoor unit, the outdoor unit installation space is opened only by turning upward without removing the protection fence, thereby facilitating the maintenance and inspection work. The rectangular frame is fixed by moving the nut to the position corresponding to the bolt insertion hole along the long hole and screwing the fixing bolt inserted into the left and right frames into the nut to absorb the displacement of the outdoor unit installation space Is done. Therefore, even if there is some deviation between the ceiling wall and the side wall of the outdoor unit installation space, the protection fence can be attached in a stable positional relationship. Further, the mesh body that is easily damaged by contact with foreign matter or the like can be separated from the frame by removing the pressing metal, so that the replacement work of the mesh body becomes easy. In addition, since the upper, lower, left and right frames, which are the main components, are made of extruded aluminum with excellent lightness, the entire protective fence is lighter, and the work load for installation and replacement on site is reduced. .

[Brief description of the drawings]

Fig. 1 Conventional stainless steel protective fence

Figure 2: Wire mesh welded to the stainless steel protective fence frame

FIG. 3 shows a protective fence that can be opened and closed according to the invention.

FIG. 4 is a side sectional view of a protective fence equipped with a wire mesh.

FIG. 5 is a cross-sectional plan view of a protective fence equipped with a wire mesh.

FIG. 6 is a press fitting for pressing a wire mesh against a frame.

FIG. 7 is a wire mesh having an upper edge portion sandwiched between a press fitting and an upper frame.

FIG. 8 is a partially exploded view of a mounting structure for connecting a protective fence to a mounting bracket so as to be openable and closable.

FIG. 9 is a partial front view of the protective fence attached to the mounting bracket so as to be openable and closable.

FIG. 10 is a perspective view of a bolt for fixing the protective fence to the mounting bracket so as to be openable and closable, and a partial cross-sectional view showing the mounting state;

FIG. 11 is a partial plan cross-sectional view of a protective fence having a lower portion fixed to a side wall of an outdoor unit installation space via a fixing bracket.

FIG. 12 is a perspective view of the fixing bracket viewed from the back side.

[Explanation of symbols]

10: Upper frame 20: Lower frame 11,
1: hollow front part 12, 22: hollow side part 13,
14, 23, 24: Screw pocket 30: Left frame 40: Right frame 31, 4
1: hollow front part 32, 42: hollow side part 50: reinforcing frame 51: hollow front part 52: hollow rear part 53, 54: screw pocket 60: wire netting 61: upper edge part 70: pressing metal fitting 71: pressing piece 72 : Mounting piece
73: biting portion 74: screw insertion hole 75: screw 76: rib 80: mounting bracket 81: anchor 82: upper piece
83: Vertical piece 84: Bolt insertion hole 85: Stepped bolt 85a: Screw part 85b: Sliding part 85c: Step part 85d: Head 86: Receiving nut 87: Washer 88: Bolt 88a: Tip part 88b: Groove 8
8c: head 88d: large diameter portion 88e: grooved shaft 88f: retaining ring 89: receiving hole 90: fixing bracket 91: anchor 92: side piece
93: Back piece 93a: Back plate 93b: Bolt accommodating space 93c: Slot 94: Nut 94a: Base 94b: Shaft 95: Bolt insertion hole 96: Fixing bolt 96a: Shaft 97: Washer A: Outdoor unit installation space B : Outdoor unit C: Ceiling wall
D: Side wall θ: Angle between pressing piece of fixing bracket and mounting piece

──────────────────────────────────────────────────続 き Continued on the front page (56) References Registered utility model 3005143 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 5/00

Claims (6)

(57) [Claims] 1. An upper, lower, left and right frame forming a rectangular frame body, which is made of an extruded aluminum material having an L-shaped cross-section by integrally molding or combining a hollow front portion and a hollow side portion, and is divided by each frame. A mesh body stretched in a rectangular internal space, a metal fitting for pressing the edges of the four sides of the mesh against the rear surface of the front hollow portion to fix the mesh body, and embedded in the ceiling wall of the outdoor unit installation space. An L-shaped mounting bracket having an upper piece fixed to the anchor and a bolt insertion hole formed in a vertical piece orthogonal to the upper piece, and a sliding portion disposed in the bolt insertion hole of the mounting metal; A back plate that has a bolt fixed to a receiving portion provided in the vicinity and a side piece fixed to an anchor embedded in a side wall of the outdoor unit installation space and forms a bolt receiving space in a back piece orthogonal to the side piece. Is fixed, and the elongated hole extending in the horizontal direction is An L-shaped fixing bracket formed on the back plate, a fixing bolt inserted into a bolt insertion hole formed through the left and right frames in the depth direction of the left and right frames near the lower ends of the left and right frames, and a long hole of the fixing bracket. A protective fence for an outdoor unit of an air conditioner, comprising: a nut which can be moved in a horizontal direction and a nut of a fixing bolt is screwed into. 2. A reinforcing frame formed of an extruded aluminum member having a T-shaped cross section and having a hollow front portion and a hollow rear portion is provided between upper and lower frames, and left and right edges of the mesh body are hollow. The protection fence for an outdoor unit of an air conditioner according to claim 1, wherein the protection fence is sandwiched between a rear surface of the front part and a pressing piece of the pressing fitting. 3. The pressing fitting according to claim 1, wherein the pressing piece is opposed to the rear surface of the hollow front portion of the frame and is erected obliquely from the pressing piece so as to approach the side surface of the hollow side portion or the hollow rear portion. A plurality of screw insertion holes for inserting screws screwed into the inner side surface of the hollow side portion of the upper, lower, left and right frames or the side surface of the hollow rear portion of the reinforcing frame are provided at appropriate intervals in the longitudinal direction of the mounting piece. An air conditioner outdoor unit protection fence formed along the road. 4. A bolt inserted into the mounting bracket according to claim 1 is opposed to a screw portion screwed into the receiving nut, a sliding portion accommodated in the bolt insertion hole of the mounting bracket, and a vertical piece of the mounting bracket from outside. A protection fence for an air conditioner outdoor unit that has a stepped portion and a sliding portion is rotatable in the bolt insertion hole with the screw portion screwed into the receiving nut. 5. A bolt inserted into the mounting bracket according to claim 1, wherein the bolt is inserted into a receiving portion of the left and right frame through a bolt insertion hole of the mounting bracket, and the bolt is outside the vertical piece of the mounting bracket. A protective fence for an air conditioner outdoor unit having a large diameter portion facing from the front, a groove formed near the tip of a grooved shaft portion, and a retaining ring fitted into a groove facing the inside of the left and right frames from the receiving portion. 6. The fixing bracket according to claim 1, wherein a nut having a base portion that is sandwiched between the back piece and the back plate and has a larger diameter than the height of the long hole is housed in the bolt housing space. An air conditioner outdoor unit protection fence in which the shaft that faces the back from the hole rises from the base.