Ventilation structure

Abstract

A ventilation structure that opens a ventilation port (3) that penetrates a wall (2) of a chicken house (1) as a livestock house to ventilate naturally when power is off, includes a ventilation door (4) that closes the ventilation port (3) in an openable and closable manner to the outside of the chicken house (1); an opening and closing arm (5) that extends from the ventilation door (4) to the inside of the chicken house (1); a first pulley (6) that is rotatably installed to the wall (2); a second pulley (7) that is installed to the first pulley (6); a first string (8) that is installed to one end of the first pulley (6), is wound halfway around the first pulley (6), and is installed to the other end of the ventilation door (4); and a second string (9) that is installed to one end of the second pulley (7) and is installed to the other end of the front end of the opening and closing arm (5), and if the first pulley (6) is rotated in a direction in which the first string (8) is released, the second string (9) is wound around the second pulley (7), and thus the ventilation door (4) opens the ventilation port (3).

Description

TECHNICAL FIELD

[0001] The present application relates to a ventilation structure for opening a ventilation port of a livestock house to perform natural ventilation at the time of power failure. BACKGROUND

[0002] In a chicken house of a large-scale chicken raising facility, ventilation is forcibly performed using a ventilation fan in order to adjust the environment in the chicken house. In such a chicken house, if the supply of commercial power is stopped (power failure), the ventilation fan stops, so that ventilation in the chicken house cannot be performed, and there is a problem that the inside of the chicken house becomes an oxygen-deficient state or the temperature in the chicken house rises, causing damage to poultry. In view of this problem, the applicant of the present application has proposed a ventilation structure capable of opening a ventilation port to perform natural ventilation at the time of power failure (for example, Patent Documents 1 and 2).

[0003] In the technology of Patent Document 1, a curtain is used to close a ventilation port, and the other end side of the rope is latched to a latching member that is magnetically attracted by an electromagnet. And if the latching member is released from the electromagnet that is demagnetized due to power failure, the latching of the other end side of the rope from the latching member is released, and the curtain falls to open the ventilation port.

[0004] In the technology of Patent Document 2, a ventilation door that closes a ventilation port is forced in the opening direction, and a key member is inserted into a latch that fixes the ventilation door to the ventilation port, thereby preventing the ventilation door from opening. This key member is connected to a hammer that is prevented from falling by an electromagnet by a string. And the hammer falls due to the demagnetization of the electromagnet caused by power failure, and the key member is pulled by the string to fall from the latch, whereby the ventilation door opens to open the ventilation port.

[0005] However, in the technologies of Patent Documents 1 and 2, it is necessary to continuously supply power to the electromagnet at all times in the normal state, and the operating cost of the chicken house increases. In addition, in the technologies of Patent Documents 1 and 2, when closing the ventilation port after power failure is repaired, it is necessary to pull the rope to be latched to the latching member, or it is desired to insert the key member into the latch after closing the ventilation door against the force, and the repair work is troublesome.

[0006] PRIOR ART DOCUMENTS

[0007] PATENT DOCUMENTS

[0008] Patent Document 1: Japanese Patent No. 3420438

[0009] Patent Document 2: Japanese Patent No. 3626911 SUMMARY

[0010] PROBLEMS TO BE SOLVED BY THE INVENTION

[0011] Accordingly, the present application has been made to solve the above problems, and an object of the present application is to provide a ventilation structure capable of reducing maintenance costs in a normal state, opening a ventilation port of a livestock house during a power failure, and easily closing the ventilation port after a power failure is repaired.

[0012] Means for solving the problem

[0013] To solve the above problem, the ventilation structure of the present application is characterized in that,

[0014] "A ventilation structure that opens a ventilation port of a wall of a livestock house to naturally ventilate during a power failure, wherein

[0015] The ventilation structure includes a ventilation door, an opening and closing arm, a first pulley, a second pulley, a first string, and a second string,

[0016] a first edge of the ventilation door is hingedly rotatably installed with respect to the ventilation port to open the ventilation door outside the livestock house and to open and close the ventilation port,

[0017] the opening and closing arm extends from a portion near the first edge of the ventilation door to the inside of the livestock house,

[0018] the first pulley is rotatably installed on the inside of the wall of the livestock house,

[0019] the second pulley is installed on the first pulley,

[0020] one end of the first string is installed on the first pulley, is wound around the first pulley in the middle, and the other end of the string is installed on a portion of the ventilation door opposite the first edge with respect to the opening and closing arm from a direction intersecting an opening surface of the ventilation port, the first string pulling the ventilation door in the direction of the inside of the livestock house,

[0021] one end of the second string is installed on the second pulley, and the other end is installed on the front end of the opening and closing arm from a direction of a second edge opposite the first edge of the ventilation port,

[0022] if the first pulley is rotated in a direction in which the first string is released from the first pulley, the second string is wound around the second pulley, and the ventilation door opens the ventilation port".

[0023] However, in the technology of Patent Document 2, in order to smoothly pull out the key member from the latch member at the time of power failure, a gap is required between the key member and the latch member, and therefore a gap is formed between the air door and the air port even in a state where the air door is closed. In addition, in the technology of Patent Document 2, since the air door is fixed not to open at the position of the latch member by the insertion of the key member, and a force is applied to the air door in the opening direction, the air door is easily bent, and therefore there is a possibility that the gap between the air door and the air port increases due to the bending of the air door. Further, if a gap exists between the air port and the air door, light and wind enter the livestock house even in a state where the air door is closed, and therefore there is a possibility that the environment in the livestock house is damaged.

[0024] According to the present structure, at the time of normal state where commercial power is supplied, since the air door that closes the air port of the livestock house is pulled to the inside of the livestock house by the first string, the air door presses the air port, and therefore it is possible to eliminate the gap between the air door and the air port, light and wind hardly enter the livestock house from the air port, and the environment in the livestock house is not damaged. In addition, at the time of normal state, by preventing the rotation of the first pulley, the air door does not open, and therefore it is not necessary to continuously supply power to the electromagnet as in the prior art, and it is possible to suppress the increase in the operating cost of the livestock house.

[0025] Further, in the case where the supply of commercial power is stopped (at the time of power failure), if the first pulley is rotated in the direction of paying out the first string, the pulling of the first string to the inside of the livestock house with respect to the air door is relaxed, and therefore the air door can be opened. At this time, since the second pulley is rotated together with the first pulley, the second string is wound around the second pulley. Further, the leading end of the opening and closing arm is pulled by the second string in the direction of the second edge opposite to the first edge to which the air door is rotatably attached, and the air door is hinge-rotated in the opening direction. Thus, the air door can be opened to open the air port, and therefore it is possible to naturally ventilate the livestock house through the air port, and it is possible to prevent the livestock house from becoming an oxygen-deficient state or the temperature in the livestock house from rising to damage the livestock.

[0026] After that, in the case where the supply of commercial power is started again and the power failure is repaired, if the first pulley is rotated in the direction opposite to the winding of the first string as described above, the second pulley is rotated in the direction of paying out the second string, and the pulling of the second string in the direction of opening of the air door via the opening and closing arm is relaxed, and therefore it is possible to close the air door. At this time, since the first string is wound around the first pulley, the air door is pulled in the closing direction by the first string, and therefore it is possible to close the air port. Thus, it is possible to return to the state at the time of normal, and it is possible to make the repair work after the power failure easy. In addition, since the air port can be opened and closed simply by rotating the first pulley in the desired direction, it is easy to perform periodic inspection.

[0027] Further, the ventilation structure of the present application can be characterized in that the ventilation structure further comprises a motor that rotates the first pulley and a storage battery that supplies power to the motor during a power failure.

[0028] According to the present structure, the motor is rotated using the power of the storage battery during a power failure, so the ventilation door can be opened and the ventilation port can be opened even during a power failure. Further, since the first pulley is rotated by the motor to open the ventilation door, the on-off switch for rotating the motor can be disposed at a position that is easy for a person to reach, and the first pulley can be disposed at a position (for example, a high position) that does not interfere with the livestock house. Moreover, since power can be supplied from the storage battery to the motor only during the period before the ventilation door is opened during a power failure, a smaller capacity storage battery can be used compared to a storage battery that supplies power to the ventilation fan during a power failure, and the increase in cost associated with the ventilation structure can be suppressed.

[0029] Effects of the Invention

[0030] As described above, according to the present application, a ventilation structure can be provided that can reduce the maintenance cost during a normal state, can open the ventilation port of a livestock house during a power failure, and can easily close the ventilation port after a power failure is repaired. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 (a) is a perspective view of a main part during a normal state when a chicken house using a ventilation structure according to an embodiment of the present application is supplied with commercial power, Figure 1 (b) is a perspective view of a main part during a state when a power failure occurs due to the supply of commercial power being stopped from the normal state of (a). Figure 1 (a) is a perspective view of a main part during a normal state when a chicken house using a ventilation structure according to an embodiment of the present application is supplied with commercial power,

[0032] Figure 2 (a) is a perspective view of a main part during a normal state when a chicken house using a ventilation structure according to an embodiment of the present application is supplied with commercial power, Figure 1 (a) is a perspective view of a main part during a normal state when a chicken house using a ventilation structure according to an embodiment of the present application is supplied with commercial power, Figure 2 (b) is a perspective view of a main part during a state when a power failure occurs due to the supply of commercial power being stopped from the normal state of (a). Figure 2 (a) is a perspective view of a main part during a normal state when a chicken house using a ventilation structure according to an embodiment of the present application is supplied with commercial power, Figure 2 (c) is an enlarged view of a part of the first pulley and the second pulley in (b), Figure 2 (b) is a perspective view of a main part during a state when a power failure occurs due to the supply of commercial power being stopped from the normal state of (a). Figure 2 (d) is an enlarged view of the vicinity of the lower edge of the ventilation door in (b). Figure 2 (b) is a perspective view of a main part during a state when a power failure occurs due to the supply of commercial power being stopped from the normal state of (a).

[0033] Figure 3 (a) is a perspective view of a main part during a normal state when a chicken house using a ventilation structure according to an embodiment of the present application is supplied with commercial power, Figure 2 (a) is a perspective view of a main part during a normal state when a chicken house using a ventilation structure according to an embodiment of the present application is supplied with commercial power, Figure 3 (b) is a perspective view of a main part during a state when a power failure occurs due to the supply of commercial power being stopped from the normal state of (a).Figure 3 (a) is an illustration of the state where the normal state changes to the state when the power is off and the ventilation valve is open. Detailed Implementation

[0034] The following uses Figure 1 and Figure 2 The ventilation structure, as a specific embodiment of the present invention, will be described. In this embodiment, the ventilation structure is used in a chicken house 1, which serves as a livestock house. The ventilation structure of this embodiment is designed to allow natural ventilation by opening the ventilation openings 3 that penetrate the wall 2 of the chicken house 1 during a power outage when the supply of commercial electricity is interrupted. Furthermore, in Figure 1 In this text, the wall panel 2c, which will be described later, is omitted. Hereinafter, the horizontal direction along the wall 2 will be referred to as the transverse direction.

[0035] The ventilation structure of this embodiment includes a ventilation door 4, an opening and closing arm 5, a first pulley 6 and a second pulley 7. The lower edge of the ventilation door 4 can be hinged and rotatably mounted relative to the ventilation port 3 so as to open outward of the chicken house 1. The opening and closing arm 5 extends into the chicken house 1 from a portion near the lower edge of the ventilation door 4. The first pulley 6 can be rotatably mounted on the inner side of the chicken house 1 of the wall 2. The second pulley 7 is mounted on the first pulley 6.

[0036] In addition, the ventilation structure also includes a first rope 8, a second rope 9, a motor 10 and a battery (not shown). One end of the first rope 8 is mounted on the first pulley 6 and the other end is mounted on the ventilation valve 4. One end of the second rope 9 is mounted on the second pulley 7 and the other end is mounted on the front end of the opening and closing arm 5. The motor 10 is used to rotate the first pulley 6. The battery can supply power to the motor 10 when there is a power outage.

[0037] In addition, the ventilation structure includes a first tensioning rope 11, a first hammer 12, a second tensioning rope 13, and a second hammer 14. One end of the first tensioning rope 11 is installed in the middle of the first rope 8, and the first hammer 12 is installed in the other end of the first tensioning rope 11 and applies tension to the first rope 8. One end of the second tensioning rope 13 is installed in the middle of the second rope 9, and the second hammer 14 is installed in the other end of the second tensioning rope 13 and applies tension to the second rope 9.

[0038] The walls 2 of the chicken coop 1 are composed of multiple longitudinal members 2a, multiple transverse members 2b, and flat wall panels 2c. The longitudinal members 2a extend vertically and are spaced apart laterally. The transverse members 2b extend laterally and are spaced apart vertically to connect the longitudinal members 2a to each other. The flat wall panels 2c are installed on the transverse members 2b. The wall panels 2c are installed on the outer side of the chicken coop 1.

[0039] The ventilation vent 3 is formed by a horizontally elongated rectangular frame 20. The frame 20 is installed in the square section of the wall 2 surrounded by two longitudinal members 2a and two transverse members 2b. The frame 20 consists of a pair of vertically extending side frames 20a, an upper frame 20b connecting the upper ends of the pair of side frames 20a to each other, and a lower frame 20c connecting the lower ends of the pair of side frames 20a to each other. The frame 20 has a flange 20d that protrudes inward and is provided throughout the entire inner circumference. A gasket 21 made of elastic material is installed on the surface of the flange 20d facing outward from the chicken coop 1 (see reference). Figure 2 (d)).

[0040] The ventilation door 4 is flat. It is positioned on the outer side of the chicken coop 1, closer to the flange 20d within the frame 20. The lower side of the ventilation door 4 is mounted on the lower frame 20c using multiple hinges 22, allowing its upper edge to open rotatably towards the outside of the chicken coop 1. When the ventilation door 4 is in an upright position, its inner side 4a facing the inside of the chicken coop 1 abuts against a washer 21 mounted on the flange 20d of the frame 20. This allows the ventilation opening 3 to open and close.

[0041] The opening / closing arm 5, on the inner side 4a of the vent valve 4, has a first rope mounting part 23 attached to the other end of the first rope 8 and a second rope 9 attached to the other end. The first rope mounting part 23 is installed near the two ends of the inner side 4a of the vent valve 4 in the lateral direction, and near the center in the vertical direction. The opening / closing arm 5 is installed near the lower edge of the inner side 4a of the vent valve 4 in the lateral direction. In other words, the first rope mounting part 23 is installed on the opposite side of the lower edge of the vent valve 4, on which the hinge 22 is installed, relative to the opening / closing arm 5. A second rope mounting part 24 is installed at the front end of the opening / closing arm 5. The second rope mounting part 24 is composed of a lifting eye bolt with an annular head, and the other end of the second rope 9 is installed on the second rope mounting part 24.

[0042] In this embodiment, such as Figure 2 As shown, the distance from the hinge center of the hinge 22 to the front end of the opening / closing arm 5 (second rope mounting part 24) is configured to be shorter than the distance from the hinge center of the hinge 22 to the first rope mounting part 23.

[0043] The motor 10 is mounted on the wall 2 at a position that is laterally outer and vertically upper than the ventilation port 3. The motor 10 is mounted with its rotation axis 10a facing laterally. A first pulley 6 is mounted on this rotation axis 10a. The motor 10 in this embodiment is a geared motor or a motor with a brake, which is difficult to rotate from the side of the first pulley 6.

[0044] Commercial power is connected to the motor 10, and a storage battery (not shown) charged by the commercial power is connected to the motor 10. By operating an on-off switch (not shown), the first pulley 6 and the second pulley 7 can be rotated in a forward direction (a direction in which the first cord 8 wound around the first pulley 6 is paid out) or in a reverse direction.

[0045] The first pulley 6 is mounted on a rotating shaft 10a of the motor 10, and the axis of the rotating shaft 10a is directed in the lateral direction. The second pulley 7 is mounted on the first pulley 6 on the side opposite the motor 10 of the first pulley 6. The second pulley 7 is mounted on the first pulley 6 in a state in which the center of the second pulley 7 is eccentric with respect to the rotating shaft 10a.

[0046] In the present embodiment, the diameter of the second pulley 7 is smaller than the diameter of the first pulley 6. In addition, as shown in Figure 2 As shown in (a), the second pulley 7 is mounted eccentrically with respect to the center of the first pulley 6 toward the side from which the first cord 8 is paid out from the first pulley 6 in a normal state in which commercial power is supplied. In addition, one end of the second cord 9 mounted on the second pulley 7 is mounted on the side opposite the side from which the first cord 8 is paid out from the first pulley 6 with respect to the center of the second pulley 7 in the normal state.

[0047] One end of the first cord 8 is mounted on the first pulley 6, is wound around the first pulley 6 halfway, and the other end is mounted on the air door 4 (first cord mounting portion 23) from a direction intersecting the opening surface of the air vent 3. As shown in Figure 2 As shown in (a), the first cord 8 is wound around the first pulley 6 once or so. Although detailed illustration is omitted, the first cord 8 is branched into two branches from halfway toward the other end, and the other ends of the two branches are mounted on two first cord mounting portions 23 mounted on the air door 4.

[0048] The first cord 8 extends downward from the first pulley 6, is wound around a first guide pulley 25 provided at the same height as the upper frame 20b of the frame 20, and extends in the lateral direction toward the upper side of the air vent 3. In addition, the first guide pulley 25 is mounted on a mounting member 26 protruding into the henhouse 1 from the vertical member 2a.

[0049] However, as shown in Figure 1As shown, three lateral guide members 27a, 27b, 27c are installed on the frame 20 at the upper frame 20b in the lateral direction. The lateral guide member 27a is installed at the lateral end of the lateral both end portions of the upper frame 20b near the first guide pulley 25. The lateral guide member 27b is installed at the lateral end of the lateral both end portions of the upper frame 20b away from the first guide pulley 25. The lateral guide member 27c is installed at the lateral center of the upper frame 20b. These lateral guide members 27a, 27b, 27c are eye bolts with the axis of the eye directed laterally. Further, the lateral guide members 27a, 27b, 27c are installed at the respective portions on the installation member 28 protruding from the upper frame 20b into the henhouse 1.

[0050] Further, a rod member 29 is installed on the frame 20, which extends in the lateral direction at the upper and lower direction center inside the henhouse 1 in a manner to link the pair of side frames 20a to each other. A vertical guide member 30 is installed at the portion directly below each of the three lateral guide members 27a, 27b, 27c of the rod member 29, which is composed of an eye bolt with the axis of the eye directed upward and downward.

[0051] Further, the first cord 8 guided laterally by the first guide pulley 25 is branched into two after passing through the lateral guide member 27a, one of which is bent downward from the lateral guide member 27a. The other of the first cord 8 is bent downward after passing through the lateral guide member 27c, the lateral guide member 27b, and the lateral guide member 27b. The first cord 8 bent downward from the lateral guide member 27a, the lateral guide member 27b, respectively, after passing through the vertical guide member 30 directly below each of them, is bent toward the outside of the henhouse 1 and installed on the first cord installation portion 23 of the ventilation door 4. Thus, the first cord 8 is installed on the ventilation door 4 from the direction intersecting the opening surface of the ventilation port 3. Further, a slit is formed in the rod member 29 through which the first cord 8 and the second cord 9 pass.

[0052] One end of the second cord 9 is installed on the second pulley 7, and the other end is installed on the front end of the opening and closing arm 5 (second cord installation portion 24) from the direction of the upper edge of the ventilation port 3. Specifically, the second cord 9 extends downward from the second pulley 7, is wound around the guide pulley 31, and is wound around the second guide pulley 32 provided between the first guide pulley 25 and the wall 2, so that the second cord 9 extends in the lateral direction toward the upper side of the ventilation port 3 (see FIG. 2). Figure 1 The guide pulley 31 is installed on the installation member 33 protruding from the vertical member 2a into the henhouse 1. The second guide pulley 32 is installed on the installation member 26.

[0053] Further, the second cord 9 is bent downward from the horizontal guide member 27c by the horizontal guide members 27a and 27c, and is further installed at the front end (second cord installation portion 24) of the opening and closing arm 5 by the horizontal central longitudinal guide member 30. Thus, the second cord 9 is installed at the front end of the opening and closing arm 5 from the direction of the upper edge of the opposite side of the lower edge of the air exchange port 3.

[0054] One end of the first tensioning cord 11 is installed on the first cord 8 via a rod bar like an oil tempering wire, and extends laterally outward of the air exchange port 3 along the upper frame 20b of the frame 20. Further, the first tensioning cord 11 extends downward by being wound around the first tensioning pulley 34 provided at the same height as the upper frame 20b laterally outward of the frame 20, and suspends the first hammer 12 installed at the other end of the first tensioning cord 11. The first tensioning pulley 34 is installed on the installation member 35 protruding into the henhouse 1 from the longitudinal member 2a. Further, although detailed illustration is omitted, one end of the rod bar is installed on the first cord 8 at a position between the horizontal guide member 27a and the first guide pulley 25, extends laterally from there and passes through three horizontal guide members 27a, 27b, 27c, and the other end of the rod bar is installed on the first tensioning cord 11 at a position between the horizontal guide member 27b and the first tensioning pulley 34.

[0055] The second tensioning cord 13, like the first tensioning cord 11, has one end installed on the second cord 9 via a rod bar, and extends laterally outward of the air exchange port 3 along the upper frame 20b of the frame 20. Further, the second tensioning cord 13 extends downward by being wound around the second tensioning pulley 36 provided between the first tensioning pulley 34 and the wall 2, and suspends the second hammer 14 installed at the other end of the second tensioning cord 13. The second tensioning pulley 36 is installed on the installation member 35.

[0056] Then, the length of the first cord 8 unwound or wound by rotation of the first pulley 6, and the length of the second cord 9 unwound or wound by rotation of the second pulley 7 can be set according to the diameters of the first pulley 6 and the second pulley 7, respectively. On the other hand, the length of the first cord 8 unwound (advance and retreat length) for opening and closing the air door 4 in the state observed from the lateral direction can be set according to the opening and closing angle of the air door 4, and the positional relationship of the hinge center of the air door 4 and the vertical guide member 30 with the first cord mounting portion 23, respectively. In addition, the advance and retreat length of the second cord 9 for opening and closing the air door 4 in the state observed from the lateral direction can be set according to the opening and closing angle of the air door 4, and the positional relationship of the hinge center of the air door 4 and the vertical guide member 30 with the second cord mounting portion 24, respectively. Also, in the present embodiment, the diameters of the first pulley 6 and the second pulley 7, the positions of the first cord mounting portion 23 and the second cord mounting portion 24, and the like are set based on the above relationships.

[0057] Next, the ventilation method of the henhouse 1 at the time of power failure in the ventilation structure of the present embodiment will be described. The ventilation structure in the normal state when commercial power is supplied is as shown in Figure 1 (a) and Figure 2 (a), the air door 4 closes the ventilation port 3 that penetrates the wall 2 of the henhouse 1. In this state, the motor 10 is stopped in a state where the first cord 8 wound around the first pulley 6 pulls the air door 4 into the henhouse 1. In other words, the air door 4 is pressed against the gasket 21 mounted on the flange portion 20d of the frame 20 that forms the ventilation port 3. Thus, there is no gap between the ventilation port 3 and the air door 4, and light and wind do not enter the henhouse 1 from the ventilation port 3.

[0058] In this normal state, for example, as shown in Figure 2 , the first cord 8 is wound clockwise around the first pulley 6, and the first cord 8 is unwound from the upper end side of the first pulley 6. On the other hand, in the second pulley 7, the second cord 9 is mounted and unwound from the lower end side, and the second cord 9 is not wound. Therefore, if the first pulley 6 is rotated in the clockwise direction (forward rotation) by the motor 10, the first cord 8 is unwound from the first pulley 6, and the second cord 9 is wound around the second pulley 7.

[0059] In addition, in the normal state, as described above, since the first cord 8 pulls the air door 4 into the henhouse 1, the first cord 8 does not slacken. On the other hand, on the second cord 9, since a tension is applied by the second hammer 14 at a position closer to the second pulley 7 side than the position where the second tension cord 13 is mounted, there is slack at the position on the opening and closing arm 5 side.

[0060] Further, in the case where the supply of commercial power is stopped (in the case of a power failure), if an opening operation is performed on the on-off switch (not shown), the motor 10 is rotated forward as electric power from a battery (not shown), and the first rope 8 is paid out from the first pulley 6. If the first pulley 6 and the second pulley 7 are rotated by the forward rotation of the motor 10, the first rope 8 is paid out from the first pulley 6, and thus the force with which the first rope 8 pulls the air door 4 into the chicken coop 1 is relaxed. At the same time, the second rope 9 is wound around the second pulley 7, and the on-off arm 5 is pulled by the second rope 9 toward the longitudinal guide member 30.

[0061] Since the air door 4 is closed in the upright state, even if the first rope 8 is relaxed, the air door 4 does not immediately hinge in the opening direction. Further, the front end of the on-off arm 5 is pulled by the second rope 9, and thus hinges in the opening direction. At this time, by making the diameter of the second pulley 7 smaller than the diameter of the first pulley 6, even if the same motor 10 is used, the second pulley 7 pulls the second rope 9 at a slower speed than the speed at which the first pulley 6 relaxes the first rope 8 by paying it out. In addition, as described above, in the second rope 9, slack is present in the portion on the on-off arm 5 side, and thus even if winding by the second pulley 7 is started, the on-off arm 5 is not immediately pulled, and the timing at which the on-off arm 5 is pulled is delayed with respect to the start of the paying out of the first rope 8. Therefore, the first rope 8 does not interfere with the force with which the air door 4 is to be opened by the second rope 9, and the air door 4 is not damaged.

[0062] Further, if the air door 4 is hinged from the vertical state to an angle of 60 degrees, the rotation of the motor 10 is stopped. Thus, the air vent 3 becomes an open state, and the inside of the chicken coop 1 can be ventilated naturally through the air vent 3.

[0063] After the supply of commercial power is started again, as a repair operation, if a closing operation is performed on the on-off switch, the motor 10 is reversed by commercial power, and by performing the reverse of the above-described operation, the air door 4 is hinged in the closing direction. Further, if the air door 4 closes the air vent 3, the rotation of the motor 10 is stopped, and the state at the time of normality is restored. At this time, in the state where the air door 4 is pulled into the chicken coop 1 by the first rope 8, the motor 10 is stopped.

[0064] In the present embodiment, since the first rope 8 and the second rope 9 are given tension by the first hammer 12 and the second hammer 14, when the first rope 8 and the second rope 9 are paid out by the forward / reverse rotation of the motor 10, the first rope 8 and the second rope 9 do not slacken, and the first rope 8 and the second rope 9 do not come off the first guide pulley 25 and the second guide pulley 32.

[0065] Further, the air door 4 can also automatically switch to the battery power when the supply of commercial power is stopped and the power is cut off, and the motor 10 is rotated forward, the air door 4 is automatically opened. Further, when the supply of commercial power is started again from the time of power cut, the power can be automatically switched to the commercial power, and the motor 10 is reversed, the air door 4 is automatically closed.

[0066] As described above, according to the air exchange structure of the present embodiment, in the normal state when the commercial power is supplied, the air door 4 closing the air exchange hole 3 of the henhouse 1 is pulled by the first rope 8 to the inside of the henhouse 1, so the air door 4 is pressed to the air exchange hole 3, thereby the gap between the air door 4 and the air exchange hole 3 can be eliminated, light and wind can not easily enter the henhouse 1 from the air exchange hole 3, and the environment in the henhouse 1 is not destroyed.

[0067] Further, in the normal state, the motor 10 is used to make the first pulley 6 not rotate, and the air door 4 will not be opened, so it is not necessary to continuously supply power to the electromagnet as in the prior art, and the increase of the operating cost of the henhouse 1 can be inhibited.

[0068] Further, in the case where the supply of commercial power is stopped, if the motor 10 is rotated in the direction of releasing the first rope 8 from the first pulley 6 (forward rotation), the pulling of the first rope 8 to the inside of the henhouse 1 relative to the air door 4 is released, so the air door 4 can be opened. At this time, since the second pulley 7 rotates together with the first pulley 6, the second rope 9 is wound on the second pulley 7. Then, the front end of the opening and closing arm 5 is pulled by the second rope 9 in the direction of the upper edge opposite to the lower edge of the air exchange hole 3, so the air door 4 is hinged and rotated in the direction of opening. Thus, since the air exchange hole 3 is opened due to the opening of the air door 4, the henhouse 1 can be naturally ventilated through the air exchange hole 3, and the henhouse 1 can be prevented from becoming an oxygen-deficient state or the temperature in the henhouse 1 rising to cause damage to the poultry.

[0069] Further, even if the air door 4 is difficult to open due to aging or the like, since the opening and closing arm 5 is pulled by the force of the motor 10 through the second rope 9 to hinge and rotate the air door 4, the air door 4 can be reliably opened.

[0070] Further, in the case where the supply of commercial power is stopped, if the motor 10 is rotated in the direction of releasing the first rope 8 from the first pulley 6 (forward rotation), the pulling of the first rope 8 to the inside of the henhouse 1 relative to the air door 4 is released, so the air door 4 can be opened. At this time, since the second pulley 7 rotates together with the first pulley 6, the second rope 9 is wound on the second pulley 7. Then, the front end of the opening and closing arm 5 is pulled by the second rope 9 in the direction of the upper edge opposite to the lower edge of the air exchange hole 3, so the air door 4 is hinged and rotated in the direction of opening. Thus, since the air exchange hole 3 is opened due to the opening of the air door 4, the henhouse 1 can be naturally ventilated through the air exchange hole 3, and the henhouse 1 can be prevented from becoming an oxygen-deficient state or the temperature in the henhouse 1 rising to cause damage to the poultry.

[0071] Furthermore, since the air inlet 3 is designed to be horizontally elongated, the ventilation efficiency is better compared to the case of a longitudinally elongated design. In addition, since the air inlet 3 can be easily opened and closed simply by rotating the motor 10 in the desired direction, regular inspections are easy to perform.

[0072] Furthermore, since it is equipped with a battery that supplies power during power outages, the ventilation opening 3 can be opened by using the motor 10 to open the ventilation valve 4 even during a power outage. Additionally, since the ventilation valve 4 is opened by rotating the first pulley 6 using the motor 10, the switch that rotates the motor 10 can be placed in an easily accessible position, and the first pulley 6 and other components can be placed in a position that does not obstruct chicken raising (e.g., a high position). Moreover, during the period from power outage until the ventilation valve 4 opens, power can be supplied to the motor 10 from the battery. Therefore, compared to a battery that continuously supplies power to the ventilation fan during a power outage, a smaller capacity battery can be used, thus reducing the increase in costs associated with the ventilation system.

[0073] The present invention has been described above with reference to preferred embodiments, but the present invention is not limited to the above embodiments. Various improvements and design changes can be made without departing from the spirit of the present invention.

[0074] For example, in the above embodiment, although a vent valve 4 is shown with its lower edge mounted so that it can be hinged and rotated, it is not limited to this, such as Figure 3 As shown, the upper edge can also be fitted with a vent valve 4 that can be hinged and rotated. Figure 3 The upper edge of the ventilation door 4 shown is mounted on the upper frame 20b of the frame 20 using multiple hinges 22, so that the lower edge of the ventilation door 4 can be opened by rotating outward hinge towards the chicken house 1. Figure 3 The implementation method is relative to Figure 2 The implementation method is reversed, and the same reference numerals are used for the same structures as described above, with descriptions omitted. The ventilation structure in this embodiment can achieve the same effect as described above.

[0075] In addition, the above embodiment shows a structure in which a motor 10 is used to open and close a ventilation valve 4 (ventilation port 3), but it is not limited to this. Multiple ventilation ports 3 (ventilation valves 4) can be arranged in a horizontal direction and connected by a first rope 8 and a second rope 9, and multiple ventilation valves 4 can be opened and closed by a motor 10.

[0076] In addition, the above embodiment shows a structure in which the first pulley 6 and the second pulley 7 are rotated by the motor 10 to open and close the ventilator 4, but it is not limited to this. The first pulley 6 and the second pulley 7 can also be rotated manually to open and close the ventilator 4.

[0077] Further, in the above-described embodiment, a structure in which the center of the second pulley 7 is eccentric with respect to the center of the first pulley 6 is shown, but is not limited thereto, and the center of the second pulley 7 can be coaxial with the center of the first pulley 6. Further, in the above-described embodiment, a structure in which if the first pulley 6 is rotated in a direction in which the first cord 8 is paid out, the second cord 9 is wound on the second pulley 7 while the first cord 8 is paid out is shown, but is not limited thereto, and the second cord 9 can be wound after the second cord 9 is paid out a little from the second pulley 7.

[0078] Further, in the above-described embodiment, a structure in which the diameter of the second pulley 7 is smaller than the diameter of the first pulley 6 is shown, but is not limited thereto, and the diameter of the first pulley 6 can be the same as the diameter of the second pulley 7.

[0079] Further, in the above-described embodiment, the chicken house 1 is shown as a livestock house in which the air exchange structure of the present application is used, but is not limited thereto, and can be used in a cow house, a pig house, a horse house, or the like.

Claims

1. A ventilation structure that allows natural ventilation by opening ventilation openings in the walls of the livestock shed during a power outage, characterized in that... The ventilation structure includes a ventilation valve, an opening and closing arm, a first pulley, a second pulley, a first rope, and a second rope. The first side of the ventilation door is hinged and rotatably mounted relative to the ventilation opening, so that the ventilation door can be opened to the outside of the livestock shed, and the ventilation opening can be opened and closed. The opening and closing arm extends from the first side near the ventilation door into the livestock shed. The first pulley is rotatably mounted on the inside of the livestock shed wall. The second pulley is mounted on the first pulley. One end of the first rope is mounted on the first pulley, and is wound around the first pulley midway through its length. The other end of the first rope is mounted on the ventilation door at a position opposite to the opening side of the opening arm, in a direction intersecting the opening surface of the ventilation port. The first rope pulls the ventilation door towards the inside of the livestock shed. One end of the second rope is mounted on the second pulley, and the other end is mounted on the front end of the opening / closing arm from the direction of the second side opposite to the first side of the ventilation port. If the first pulley is rotated in the direction from which the first rope is released from the first pulley, the second rope is wound around the second pulley and pulled towards the second side by the second rope through the front end of the opening and closing arm. The vent valve hinges to rotate in the opening direction and opens the vent.

2. The ventilation structure as described in claim 1, characterized in that, The ventilation system also includes a motor and a battery. The motor causes the first pulley to rotate. The battery can supply power to the motor during a power outage.

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