JP2010132175A - Interior air discharge casing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To integrally form an interior air discharge casing to be installed in a cabin, of synthetic resin, so that the casing can be inexpensively manufactured and easily installed in the cabin. <P>SOLUTION: The interior air discharge casing is integrally formed of synthetic resin, in a state that a ceiling wall, a pair of opposite first side walls, and a pair of opposite second side walls expand, wherein: the pair of first side walls extends and projects so that they can bend to be vertically suspended downward from the ceiling wall via a pair of first connecting bend portions from opposite outside edges of the ceiling wall; the pair of second side walls extends and projects so that they can bend to be vertically suspended downward from the ceiling wall via a pair of second connecting bend portions from the other opposite outside edges of the ceiling wall; and the ceiling wall, the pair of opposite first side walls, and the pair of opposite second side walls are configured to be able to be assembled into a three-dimensional shape from their expanded state. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an inside air discharge case installed in a cabin of a work machine.

  2. Description of the Related Art Conventionally, an inside air discharge case that is installed in a cabin of a work machine such as a tractor includes a pair of first side walls that face a top wall and a pair of second side walls that face each other, and an inside air at a lower end portion. A discharge port is provided, an inside air intake window is provided on the first side wall, and a closing plate constituted by a rubber plate or the like is provided on the inner surface side of the first side wall so as to close the inside air intake window of the first side wall from the inside. When the internal pressure in the cabin rises due to the external air introduction operation of the air conditioner, the internal plate is pushed inward by the internal pressure, the internal air intake window opens, and the air in the cabin is introduced from the internal air intake window Then, there is one that is sent out from the inside air outlet to the outside of the cabin (for example, Patent Document 1).

  Moreover, as shown in FIG. 11, as a conventional room air discharge case 71 improved from the room air discharge case, a pair of first side walls 73 facing the top wall 72 and a pair of second side walls 74 facing each other are provided. An inside air discharge port 75 is provided at the lower end portion, the pair of first side walls 73 are inclined so as to be spaced apart from each other as they go upward, and an inside air intake window 77 is provided on the pair of first side walls 73, A closing plate 78 made of a rubber plate or the like is provided on the inner surface side of each first side wall 73 so as to close the inside air intake window 77 of each first side wall 73 from the inside, and the upper end portion of this closing plate 78 is the first side wall. 73 is supported by the upper end portion on the inner surface side of 73 and is pushed by the internal air pressure in the cabin, and the lower side of the closing plate 78 swings inwardly from the inner surface of the first side wall 73 to open the inside air intake window 77. Air intake in the cabin 7 and sent out from the inside air outlet 75 to the outside of the cabin (although there is no known literature, the applicant actually puts this in the inside air discharging case installed in the cabin of the tractor. It was implemented in such a configuration). The inside air discharge case 71 is formed by inclining the pair of first side walls 73 so as to expand upward, and when the atmospheric pressure in the cabin that has become high pressure returns to its original state, the inside air discharge case 71 makes good use of the weight of the closing plate 78. The inside air intake window 77 can be reliably closed with 78.

And these conventional inside air discharge cases were formed by press-molding a sheet metal.
JP 2001-158221 A

Therefore, since the conventional inside air discharge case is formed by press-molding a sheet metal, it is necessary to press-mold the sheet metal by a press device after cutting the sheet metal into a predetermined shape, which is cumbersome and expensive to manufacture.
Therefore, it is conceivable that the inside air discharge case is integrally formed of synthetic resin so that the inside air discharge case can be manufactured easily and inexpensively with synthetic resin. In the case where the pair of second side walls opposed to the first side wall are integrally formed of a synthetic resin while maintaining a three-dimensional shape, the pair of first side walls are inclined so as to be spaced apart from each other as they go upward. Since it is connected to both side edges of the ceiling wall, the punching die cannot be removed from the molded product after molding, and it is practically difficult to integrally mold the inside air discharge case with a synthetic resin.

  The present invention has been made in view of the above-mentioned problems, and the interior air discharge case installed in the cabin is integrally formed of synthetic resin so that it can be easily and inexpensively manufactured and easily installed in the cabin. Is.

A technical means of the present invention for solving this technical problem is an inside air discharge case installed in a cabin of a work machine, and a pair of second side walls opposed to a pair of first side walls opposed to a top wall. And a pair of first side walls are inclined so as to be spaced apart from each other as they go upward, and a pair of first side walls is provided with an inside air intake window, A closing plate is provided on the inner surface side of each first side wall so as to close the inside air intake window of each first side wall from the inside, and the upper end portion of the closing plate is supported by the upper end portion on the inner surface side of the first side wall, The inside of the cabin is introduced through the inside air intake window by opening the inside air intake window by pushing the lower side of the closing plate inwardly from the inner surface of the first side wall. Inside air discharge case to be sent out of the cabin from the outlet Oite,
The pair of first side walls opposed to the top wall and the pair of second side walls opposed to each other are formed integrally with the synthetic resin, and the pair of first side walls are paired with the first pair of first edges from the opposite outer edges of the top wall. The pair of second side walls are extended and protruded so as to be bent downward from the top wall via the connecting bent portion, and the pair of second side walls are connected to the other opposing outer edges of the top wall via the pair of first connecting bent portions. It is extended and protruded so that it can be bent in a state where it hangs downward from the top wall, and a pair of first side walls facing the top wall and a pair of second side walls facing the top wall can be assembled into a three-dimensional shape from the deployed state It is in the point.

Further, according to another technical means of the present invention, the closing plate is made of a rubber plate having flexibility or elasticity, and a support pin is integrally formed at the upper end portion on the inner surface side of the first side wall, A pair of pressing pieces are integrally formed corresponding to each of the support pins, and the pair of first side walls are formed with respect to the top wall in a state where the upper end portion of the closing plate is externally held by the support pins through the attachment holes. When it is folded and combined so as to hang down, the upper end portions of the blocking plates on both sides of the corresponding support pins are pressed against the first side wall by each pair of pressing pieces.
Further, according to another technical means of the present invention, a pair of sandwiching pieces for sandwiching the outer edge of the second side wall is integrally formed at both ends of the pair of first side walls, and a pair of facing the top wall is formed. When the pair of second side walls opposed to the first side wall are assembled in a three-dimensional shape from the expanded state, the assembled state is held by holding the outer edge of the second side wall with the pair of holding pieces. It is in the point.

  According to another technical means of the present invention, a locking hole is provided in one of the lower part of the sandwiching piece of the first side wall and the lower part of the outer end edge part of the second side wall, and the engagement protrusion is provided in the other. When the outer edge of the second side wall is clamped by the pair of clamping pieces, the outer edge of the second side wall is not detached from the pair of clamping pieces and engages with the locking hole. The projecting piece is configured to be detachably engaged.

  According to the present invention, the pair of first side walls opposed to the top wall and the pair of second side walls opposed to each other are formed integrally with the synthetic resin in a developed state, and the pair of first side walls are outside the top wall facing each other. The pair of second side walls are extended and protruded so as to be bent downward from the top wall through the pair of first connection bent portions, and the pair of second side walls are paired with the first pair of second outer side edges from the other opposite outer edge of the top wall. A pair of first side walls opposed to the top wall and a pair of second side walls opposed to the top wall are extended and projected so as to be bent in a state of hanging downward from the top wall via the one connection bending portion. Since it can be assembled into a shape, it can be easily removed when the inside air discharge case is integrally molded with synthetic resin, and the inside air discharge case installed in the cabin can be easily and cheaply made with synthetic resin. Can be manufactured. Further, since the molding is performed in the unfolded state, the mold structure for molding the inside air discharge case is simplified, the mold size can be reduced, and also from this point, the inside air discharge case can be manufactured at low cost. . Further, after the inside air discharge case is put in the cabin in a deployed state, the inside air discharge case can be assembled and installed in a three-dimensional shape in the cabin, and the installation work of the inside air discharge case becomes simple and convenient.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 9 and 10, reference numeral 1 denotes a tractor, and a traveling vehicle body 4 is configured by connecting an engine 2, a transmission case 3, and the like. The tractor 1 is a two-shaft four-wheel drive type having a front wheel 6 and a rear wheel 7, and a cabin 11 is mounted between the left and right rear wheel fenders 10 so as to cover the driver's seat 8 and the control device 9 at the rear part of the traveling vehicle body 4. ing.
The cabin 11 is detachably mounted on the traveling vehicle body 4 via a cushion material. The cabin frame 13 is fixed to the traveling vehicle body 4, the ceiling member 14 is provided on the cabin frame 13, and the left and right rear sides. A skeleton is formed by the member that connects the wheel fender 10 and attaches the driver's seat 8 and the floor sheet 15.

The cabin frame 13 includes a pair of left and right front and rear columns 17 and 18 and a pair of left and right intermediate columns 19. The upper and lower portions of the cabin frame 13 are an upper horizontal member 21, an upper rear member 22, a lower horizontal member 23, and a lower rear member 24, respectively. Etc. are appropriately connected. The left and right intermediate struts 19 are supported by a door 25 made of glass on the entire surface so as to be rotatable about a vertical axis via a hinge, and are formed between the front strut 17 and the intermediate strut 19. The mouth is openable and closable. A windshield is provided between the left and right front columns 17, a side glass 27 is provided between the intermediate column 19 and the rear column 18, and a rear glass 28 that can be opened and closed is provided between the left and right rear columns 18.

The ceiling member 14 is formed by aligning the outer roof and the inner roof in the middle. The air conditioner 30 is arranged inside the ceiling member 14, and air from the air conditioner 30 is supplied to the inner roof facing the interior of the cabin 11. A large number of air outlets are blown out.
In FIG. 10, the floor seat 15 is inclined so as to rise rearward from the rear end of the horizontal wall portion 31 and the horizontal wall portion 31 covering the upper part of the hydraulic device for raising and lowering the work implement (not shown) at the rear upper part of the traveling vehicle body 4. The driver's seat 8 is supported on the upper side of the horizontal wall portion 31 via a support tool 34, and a communication port 36 is formed in the horizontal wall portion 31 on the rear side of the support tool 34. An inside air discharge case 37 is installed on the floor sheet 15 so as to cover the communication port 36.

1 to 5, the inside air discharge case 37 includes a pair of first side walls 41 facing the top wall 39 and a pair of second side walls 42 facing each other, and the inside air discharge port 43 is provided at the lower end. .
The ceiling wall 39 of the inside air discharge case 37 is formed in a rectangular plate shape, the pair of first side walls 41 are formed in a rectangular plate shape, and the pair of second side walls 42 are formed in a trapezoidal plate shape with a lower width on the lower side. ing. The pair of first side walls 41 are inclined so as to be spaced apart from each other as they go upward. Inside air intake windows 44 are provided on the pair of first side walls 41, and the inside air intake windows 44 of each first side wall 41 are provided. A closing plate (rubber flap) 45 is provided on the inner surface side of each first side wall 41 so as to close the inner side from the inner side, and the upper end portion of the closing plate 45 is supported by the upper end portion on the inner surface side of the first side wall 41.

  A pair of mounting flanges 46 project integrally outward from the lower ends of the pair of second side walls 42, and a connecting rib 50 that connects the mounting flange 46 and the lower ends of the second side walls 42 is connected to the mounting flange 46. A pair is provided integrally. The mounting flange 46 is fastened and fixed to the horizontal wall portion 31 of the floor sheet 15 of the cabin 11 with a fastener 47 such as a bolt, so that the communication port 36 of the horizontal wall portion 31 and the inside air discharge port 43 of the inside air discharge case 37 are connected. The inside air discharge case 37 is installed and fixed to the horizontal wall portion 31 so as to coincide with each other, the pair of first side walls 41 of the inside air discharge case 37 are arranged at the front and rear, and the pair of second side walls 42 are arranged at the left and right. .

When the internal pressure of the cabin 11 is increased by the outside air introduction operation of the air conditioner 30, the closing plate 45 is pushed inward in the front-rear direction by the internal pressure of the cabin 11, and the lower side of the closing plate 45 is the first side wall 41. By swinging inward from the inner surface, the inside air intake window 44 is opened, the air in the cabin 11 is introduced from the inside air intake window 44, and is sent out from the inside air discharge port 43 and the communication port 36 to the outside of the cabin 11. Is configured to do.
As shown in FIG. 6, the pair of first side walls 41 facing the top wall 39 of the inside air discharge case 37 and the pair of second side walls 42 facing each other are unfolded and formed integrally with a synthetic resin. The first side wall 41 is extended and protruded so as to be bent from the opposite outer edge of the top wall 39 via the pair of first connecting bent portions 48 so as to hang downward from the top wall 39, and the pair of second side walls 42. Is extended and protruded from the other opposing outer edge of the top wall 39 through a pair of second connecting bent portions 49 so as to be bent downward from the top wall 39, and the top wall 39 and the pair of second connecting bent portions 49. The 1 side wall 41 and a pair of 2nd side wall 42 are comprised so that a three-dimensional shape can be assembled from an expansion | deployment state. As shown in FIG. 8, the first connecting bent portion 48 is formed thinner than the top wall 39 and the first side wall 41, and connects the top wall 39 and the pair of first side walls 41 so as to be bendable. Yes. Similarly to the case of the first connecting bent portion 48, the second connecting bent portion 49 is formed thinner than the top wall 39 and the second side wall 42, and the top wall 39 and the pair of second side walls 42 Are connected so that they can be bent.

As shown in FIGS. 4, 5, and 6, the closing plate 45 is configured separately from the top wall 39, the first side wall 41, and the second side wall 42 by a rubber plate having flexibility or elasticity. A pair of mounting pieces 54 in the width direction protrude upward from the upper end of the blocking plate 45, and mounting holes 53 are formed in the mounting pieces 54.
In FIG. 1 to FIG. 6, support pins 51 are integrally formed on the upper end portions on the inner surface side of the pair of first side walls 41, and the support pins 51 are provided on both side ends of the upper end portions of the first side walls 41. . A pair of pressing pieces 52 are integrally formed on the top wall 39 corresponding to each support pin 51, and the upper end portion (attachment piece 54) of the closing plate 45 is externally fitted and held on the support pin 51 through the attachment hole 53. Thus, when the pair of first side walls 41 are bent and combined with the top wall 39 so as to hang down, the upper ends of the blocking plates 45 on both sides of the support pins 51 corresponding to the pair of pressing pieces 52 are first. It is configured to press against the side wall 41.

  A pair of sandwiching pieces 55 and 56 (an outer sandwiching piece 55 and an inner sandwiching piece 56) that sandwich the outer edge of the second side wall 42 are integrally formed on both side ends of the pair of first side walls 41. A reinforcing rib 59 that connects the lower ends of the inner clamping pieces 56 is integrally formed. When the top wall 39, the pair of first side walls 41, and the pair of second side walls 42 are assembled in a three-dimensional shape from the expanded state (the pair of first side walls 41 and the pair of second side walls 42 with respect to the top wall 39). And the pair of outer sandwiching pieces 55 and inner sandwiching pieces 56 sandwich the outer edge of the second side wall 42 to maintain the assembled state. ing. Further, by sandwiching the outer edge of the second side wall 42 with the pair of clamping pieces 55 and 56, the pair of first side walls 41 and the pair of second side walls 42 are combined in an airtight state. Yes.

As shown also in FIG. 7, a locking hole 57 is provided in the lower part of the outer sandwiching piece 55 of the first side wall 41 so as to penetrate inside and outside, and the locking hole is formed in the lower part of the outer edge of the second side wall 42. 57 is provided, and when the outer end edge portion of the second side wall 42 is clamped by the pair of clamping pieces 55, 56, the second side wall 42 extends from the pair of clamping pieces 55, 56. The engaging protrusions 58 are configured to be detachably engaged with the locking holes 57 so that the outer end edge portions of the engaging protrusions 57 are not detached.
According to the embodiment, since the pair of first side walls 41 facing the top wall 39 of the inside air discharge case 37 and the pair of second side walls 42 facing each other are unfolded, they are integrally formed of synthetic resin. In addition, when the inside air discharge case 37 is integrally formed, it can be easily removed, and the inside air discharge case 37 installed in the cabin 11 can be easily and inexpensively manufactured with synthetic resin. In addition, the mold structure for molding the inside air discharge case 37 can be simplified and the mold size can be reduced. From this point, the inside air discharge case 37 can be manufactured at low cost.

The pair of first side walls 41 are extended and protruded so as to be bent from the opposing outer edges of the top wall 39 through the pair of first connecting bent portions 48 so as to hang downward from the top wall 39. Since the second side wall 42 of the top wall 39 extends and protrudes from the other opposing outer edge of the top wall 39 through a pair of second connecting bent portions 49 so as to be bent downward from the top wall 39. After the top wall 39, the pair of first side walls 41, and the pair of second side walls 42 are integrally formed, the three-dimensional shape can be easily assembled from the expanded state by manual work or the like.
Also, when the pair of first side walls 41 are folded and combined with the top wall 39 in a state where the upper end of the closing plate 45 is externally held by the support pins 51 via the mounting holes 53. The upper ends of the closing plates 45 on both sides of the corresponding support pins 51 can be pressed against the first side wall 41 by each pair of pressing pieces 52, and a clip or the like for attaching the closing plate 45 to the first side wall 41 is unnecessary. Thus, the closing plate 45 can be easily incorporated into the inner surfaces of the pair of first side walls 41, and the mounting operation of the closing plate 45 can be easily and reliably performed.

  That is, conventionally, since the top wall 72, the pair of first side walls 73, and the pair of second side walls 74 of the inside air discharge case 71 are formed by press forming a sheet metal, the top wall 72 and the pair of first side walls 71 are formed. After the side wall 73 and the pair of second side walls 74 are assembled into a three-dimensional shape by press molding, the closing plate 78 is inserted into the narrow inside air discharge case 71 from the inside air discharge port 75, and the upper end portion of the closing plate 78 is supported by a support pin or the like. Need to be fixed to the upper ends of the pair of first side walls 73, and the mounting of the closing plate 78 is very troublesome. However, in the embodiment of the present application, as described above, the top wall 72 and the pair of first side walls When the side wall 73 and the pair of second side walls 74 are easily assembled from the developed state into a three-dimensional shape, the closing plate 78 can be easily and reliably attached.

Further, when the top wall 39, the pair of first side walls 41, and the pair of second side walls 42 are assembled from the developed state into a three-dimensional shape, the outer edge of the second side wall 42 is formed by the pair of clamping pieces 55, 56. For sandwiching, the pair of first side walls 41 and the pair of second side walls 42 are simply connected to each other, so that the top wall 39, the pair of first side walls 41, and the pair of second side walls 42 are securely formed in a three-dimensional shape. It can be held and is convenient. Further, by sandwiching the outer end edge portion of the second side wall 42 with the pair of sandwiching pieces 55 and 56, the end portions of the pair of first side walls 41 and the pair of second side walls 42 can be covered over a wide range. In addition, the airtightness of the two can be improved, a sponge for securing the airtightness is unnecessary, and a fixing member for connecting and fixing the pair of first side walls 41 and the pair of second side walls 42 is also unnecessary. .

  Further, when the top wall 39, the pair of first side walls 41, and the pair of second side walls 42 are assembled from the developed state into a three-dimensional shape, the outer edge of the second side wall 42 is formed by the pair of clamping pieces 55, 56. At the same time as holding and assembling, the engaging protrusions 58 are detachably engaged with the locking holes 57 so that the outer edge of the second side wall 42 is detached from the pair of holding pieces 55 and 56. The top wall 39, the first side wall 41, and the second side wall 42 can be reliably held in a three-dimensional shape, and the assembling of the top wall 39, the first side wall 41, and the second side wall 42 is very At the same time, the assembly state of the three-dimensional shape can be firmly held.

  In the embodiment, the locking hole 57 is provided in the lower part of the outer clamping piece 55 of the first side wall 41, and the engagement corresponding to the locking hole 57 is performed in the lower part of the outer edge of the second side wall 42. Instead of this, a locking hole 57 is provided in the lower part of the inner clamping piece 56 of the first side wall 41, and the locking hole 57 is provided in the lower part of the outer edge of the second side wall 42. When the outer end edge portion of the second side wall 42 is sandwiched between the pair of sandwiching pieces 55 and 56, the outer end edge of the second side wall 42 is formed from the pair of sandwiching pieces 55 and 56. The engaging protrusions 58 may be configured to be detachably engaged with the locking holes 57 so that the portions do not come off. Also, a locking hole 57 is provided at the lower part of the outer edge of the second side wall 42, and an engagement corresponding to the locking hole 57 is provided at the lower part of the outer holding piece 55 or the lower part of the inner holding piece 56 of the first side wall 41. When the projecting piece 58 is provided and the outer end edge portion of the second side wall 42 is sandwiched between the pair of sandwiching pieces 55 and 56, the outer end edge portion of the second side wall 42 does not come off from the pair of sandwiching pieces 55 and 56. In this manner, the engaging protrusions 58 may be detachably engaged with the locking holes 57. Furthermore, a locking hole 57 is provided in each of the lower portion of the outer sandwiching piece 55 and the lower portion of the inner sandwiching piece 56 of the first side wall 41, and the engagement corresponding to each locking hole 57 is formed in the lower portion of the outer edge portion of the second side wall 42. When the outer end edge of the second side wall 42 is sandwiched between the pair of sandwiching pieces 55 and 56, the outer end edge of the second side wall 42 is detached from the pair of sandwiching pieces 55 and 56. The engaging protrusions 58 may be detachably engaged with the locking holes 57 so that the locking holes 57 are not engaged with each other, or the locking holes 57 are formed below the outer edge of the second side wall 42. An engagement protrusion 58 corresponding to the locking hole 57 is provided at the lower part of the outer sandwiching piece 55 and the lower part of the inner sandwiching piece 56 of the first side wall 41, and the second sidewall 42 is formed by the pair of sandwiching pieces 55, 56. When the outer end edge portion of the second side wall 42 is clamped, the locking hole 5 prevents the outer end edge portion of the second side wall 42 from coming off from the pair of holding pieces 55 and 56. Engaging protrusion 58 may be configured to engage freely disengage the.

It is a front view of the inside air discharge case which shows one Embodiment of this invention. It is a side view of the inside air discharge case. It is a bottom view of the inside air discharge case. FIG. 3 is a view taken in the direction of arrow A in FIG. 2. It is a BB sectional view taken on the line of FIG. It is an expanded view of the inside air discharge case. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is a side view of the whole tractor. It is side surface sectional drawing of the rear part of the tractor. It is a perspective view of the inside air discharge case which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tractor 11 Cabin 37 Inside air discharge case 39 Top wall 41 1st side wall 42 2nd side wall 43 Inside air discharge port 44 Inside air intake window 45 Closure board 48 1st connection bending part 49 2nd connection bending part 51 Support pin 52 Pressing piece 53 Mounting hole 55 Outer clamping piece 56 Inner clamping piece 57 Locking piece 58 Engaging protrusion

Claims (4)

An inside air discharge case (37) installed in the cabin (11) of the work machine, and a pair of second side walls (42) facing a pair of first side walls (41) facing the top wall (39). And a pair of first side walls (41) are inclined so as to be spaced apart from each other as they go upward, and the pair of first side walls (41). The internal air intake window (44) is provided on the inner side of each first side wall (41) so as to close the internal air intake window (44) of each first side wall (41) from the inside. Provided, the upper end portion of the closing plate (45) is supported by the upper end portion on the inner surface side of the first side wall (41), and the lower side of the closing plate (45) is first pressed by the internal pressure in the cabin (11). The inside air intake window (44) is opened by swinging inward from the inner surface of the side wall (41). By introducing air in the cabin (11) from the inside air intake insertion window (44), the inside air discharge casing which is adapted to deliver from the inside air outlet (43) to the outside of the cabin (11),
A pair of first side walls (41) opposed to the top wall (39) and a pair of second side walls (42) opposed to each other are formed integrally with synthetic resin, and the pair of first side walls (41) are Extending and projecting from the opposing outer edges of the top wall (39) via the pair of first connecting bent portions (48) so as to be bent downward from the top wall (39), the pair of second walls The side wall (42) extends from the other opposing outer edge of the top wall (39) through a pair of first connecting bent portions (48) so as to be bent downward from the top wall (39). The pair of first side walls (41) that protrudes and faces the top wall (39) and the pair of second side walls (42) that face each other are configured to be assembled into a three-dimensional shape from the developed state. Inside air discharge case.   The closing plate (45) is formed of a rubber plate, and a support pin (51) is integrally formed at the upper end portion on the inner surface side of the first side wall (41), and each support pin (51) is formed on the top wall (39). A pair of pressing pieces (52) are integrally formed corresponding to the top wall (51), with the upper end of the closing plate (45) being fitted and held on the support pin (51) via the mounting hole (53). 39) When the pair of first side walls (41) are folded so as to hang down and combined with each other, the closing plates (45) on both sides of the support pins (51) corresponding to each pair of pressing pieces (52) The inside air discharge case according to claim 1, wherein the upper end portion of the inside air is pressed against the first side wall (41).   A pair of clamping pieces (55, 56) that clamp the outer end edge of the second side wall (42) are integrally formed at both ends of the pair of first side walls (41), and face the top wall (39). When the pair of first side walls (41) and the pair of second side walls (42) facing each other are assembled into a three-dimensional shape from the deployed state, the pair of clamping pieces (55, 56) The inside air discharge case according to claim 1 or 2, characterized in that the outer end edge portion is sandwiched to hold the assembled state.   A locking hole (57) is provided in one of the lower part of the sandwiching piece of the first side wall (41) and the lower part of the outer edge of the second side wall (42), and the engaging protrusion (58) is provided on the other side. ) And the pair of sandwiching pieces (55, 56) sandwich the outer edge of the second side wall (42) from the pair of sandwiching pieces (55, 56) to the second sidewall (42). The inside air according to claim 3, wherein the engaging protrusion (58) is detachably engaged with the locking hole (57) so that the outer end edge portion does not come off. Discharge case.

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