Ventilation structure

Abstract

A ventilation structure that causes natural ventilation by opening a ventilation opening (3) penetrating a wall (2) of a poultry house (1) as a livestock house during a power outage, the ventilation structure comprising: a ventilation door (4) that openably closes the ventilation opening (3) to open to the outside of the poultry house (1); an opening / closing arm (5) that extends from the ventilation door (4) into the poultry house (1); a first pulley (6) rotatably attached to the wall (2); a second pulley (7) attached to the first pulley (6); a first wire (8) that is attached at one end to the first pulley (6), wound at the middle part around the first pulley (6), and attached at the other end to the ventilation door (4); and a second wire (9) that is attached at one end to the second pulley (7) and attached at the other end to the tip of the opening / closing arm (5), wherein where the first pulley (6) is rotated in the direction in which the first wire (8) is fed, the second wire (9) is wound on the second pulley (7) and the ventilation door (4) opens the ventilation opening (3).

Description

Technical Field

[0001] The present invention relates to a ventilation structure for opening a ventilation port of a livestock house during a power outage to allow natural ventilation.

Background Art

[0002] In a chicken house of a large-scale chicken farm, forced ventilation is performed by a ventilation fan to adjust the environment inside the chicken house. When the supply of commercial power to such a chicken house stops (power outage), the ventilation fan stops, making it impossible to ventilate the inside of the chicken house. As a result, there is a problem that the inside of the chicken house becomes oxygen-deficient or the temperature inside the chicken house rises, causing damage to the chickens. In response to this problem, the applicant of the present application has proposed a ventilation structure capable of opening the ventilation port for natural ventilation during a power outage (for example, Patent Documents 1 and 2).

[0003] The technology of Patent Document 1 closes the ventilation port with a curtain pulled up by a rope, and locks the other end of the rope to a locking member magnetically attached to an electromagnet. When the locking member separates from the electromagnet demagnetized by a power outage, the locking of the other end of the rope to the locking member is released, the curtain drops, and the ventilation port is opened.

[0004] The technology of Patent Document 2 biases a ventilation door that closes the ventilation port in the opening direction, and inserts a key member into a latch that fixes the ventilation door to the ventilation port so that the ventilation door cannot be opened. This key member is connected by a wire to a weight whose fall is prevented by an electromagnet. When the weight drops due to demagnetization of the electromagnet caused by a power outage, the key member is pulled by the wire and removed from the latch, so that the ventilation door opens and the ventilation port is opened.

[0005] However, in the technologies of Patent Documents 1 and 2, it is necessary to continuously supply power to the electromagnet at all times during normal operation, which increases the running cost of the chicken coop. Further, in the technologies of Patent Documents 1 and 2, when closing the ventilation opening after the power outage is restored, it is necessary to pull the rope to lock it to the locking member, or to close the ventilation door against the biasing force and then insert the key member into the latch, which takes time for the restoration work.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] Therefore, in view of the above circumstances, an object of the present invention is to provide a ventilation structure that can reduce the maintenance cost during normal operation, can open the ventilation opening of the livestock shed during a power outage, and can easily close the ventilation opening after the power outage is restored.

Means for Solving the Problems

[0008] In order to solve the above problems, the ventilation structure according to the present invention is a ventilation structure that penetrates the wall of the livestock shed and opens the ventilation opening during a power outage to allow natural ventilation, a ventilation door having a first side rotatably attached to the ventilation opening so as to open to the outside of the livestock shed and closing the ventilation opening so as to be openable and closable, and an opening / closing arm extending into the livestock shed from a portion of the ventilation door near the first side, a first pulley rotatably attached to the inside of the livestock shed on the wall body, a second pulley attached to the first pulley, One end is attached to the first pulley, the middle part is wound around the first pulley, and from a direction intersecting the opening surface of the ventilation port, the other end is attached to a part on the ventilation door on the side opposite to the first side with respect to the opening and closing arm, and the first wire that pulls the ventilation door in the direction of the livestock barn, One end is attached to the second pulley, and the other end is a second wire attached to the tip of the opening and closing arm from the direction of the second side opposite to the first side at the ventilation port comprising When the first pulley is rotated in the direction in which the first wire is fed out from the first pulley, the second wire is wound around the second pulley 、The tip of the opening / closing arm is pulled by the second wire in the direction of the second side, causing the ventilation door to hinge-rotate in the opening direction and opening the ventilation port」 characterized by

[0009] By the way, in the technology of Patent Document 2, in order for the key member to smoothly come out of the latch during a power outage, a gap is required between the key member and the latch. Therefore, even when the ventilation door is closed, a gap is formed between the ventilation door and the ventilation port. Further, in the technology of Patent Document 2, while fixing the ventilation door so as not to open at the latch part by inserting the key member, the ventilation door is biased in the opening direction, so the ventilation door is likely to bend, and the gap between the ventilation door and the ventilation port may be promoted by the bending of the ventilation door. And if there is a gap between the ventilation port and the ventilation door, light and wind may enter the livestock barn even when the ventilation door is closed, and the environment in the livestock barn may be damaged.

[0010] According to this configuration, during normal times when commercial power is supplied, since the ventilation door that closes the ventilation port of the livestock barn is pulled inward of the livestock barn by the first wire, the ventilation door is pressed against the ventilation port, so it is possible to eliminate the gap between the ventilation door and the ventilation port, making it difficult for light and wind to enter the livestock barn from the ventilation port, and the environment in the livestock barn will not be damaged. Also, during normal times, by preventing the first pulley from rotating, the ventilation door will not open, so there is no need to continuously supply power to the electromagnet as in the prior art, and an increase in the running cost of the livestock barn can be suppressed.

[0011] And when the supply of commercial power stops (in the event of a power outage), if the first pulley is rotated in the direction in which the first wire is paid out, the pulling of the ventilation door inward into the livestock barn by the first wire is loosened, and the ventilation door can be opened. At this time, since the second pulley rotates together with the first pulley, the second wire is wound around the second pulley. Then, the tip of the opening / closing arm is pulled by the second wire in the direction of the second side opposite to the first side to which the ventilation door is rotatably attached by the hinge, and the ventilation door hinges open in the opening direction. As a result, the ventilation door can be opened to open the ventilation opening, so natural ventilation of the livestock barn can be performed through the ventilation opening, preventing the livestock barn from becoming oxygen-deficient or the temperature inside the livestock barn from rising and damaging the livestock.

[0012] After that, when the supply of commercial power resumes and the power outage is restored, if the first pulley is rotated in the direction of winding up the first wire, opposite to the above, the second pulley rotates in the direction of paying out the second wire, and the pulling of the opening / closing arm by the second wire in the opening direction of the ventilation door is loosened, and the ventilation door can be closed. At this time, since the first wire is wound around the first pulley, the ventilation door is pulled by the first wire in the closing direction, and the ventilation opening can be closed. As a result, it is possible to return to the normal state and make the restoration work after a power outage easier. Also, since the ventilation opening can be easily opened and closed by simply rotating the first pulley in the desired direction, regular inspection is easy.

[0013] In addition, the ventilation structure according to the present invention, in addition to the above configuration, "a motor for rotating the first pulley, and a storage battery capable of supplying power to the motor during a power outage" may be further provided.

[0014] According to this configuration, since the motor is rotated by the power of the storage battery during a power outage, the ventilation door can be opened and the ventilation opening can be released even during a power outage. Further, since the first pulley is rotated by the motor to open the ventilation door, it is possible to provide an opening / closing switch for rotating the motor at a position easily reachable by hand, and the first pulley can be provided at a position where it does not interfere with the livestock shed (for example, a high position). Furthermore, since it is only necessary to supply power from the storage battery to the motor until the ventilation door opens during a power outage, a smaller-capacity storage battery can be used compared to the case of continuously supplying power to the ventilation fan during a power outage, and an increase in the cost associated with the ventilation structure can be suppressed.

Effects of the Invention

[0015] As described above, according to the present invention, it is possible to provide a ventilation structure that can reduce the maintenance cost during normal times, can open the ventilation opening of the livestock shed during a power outage, and can easily close the ventilation opening after the power outage is restored.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0017] A ventilation structure according to a specific embodiment of the present invention will be described below with reference to Figures 1 and 2. In this embodiment, the ventilation structure is used in a poultry house 1, which serves as a livestock house. The ventilation structure of this embodiment opens ventilation openings 3 penetrating a wall 2 of the poultry house 1 to allow natural ventilation during a power outage when commercial power supply is stopped. Note that Figure 1 does not show wall panel 2c of wall 2, which will be described later. In the following description, the horizontal direction along wall 2 will be referred to as the lateral direction.

[0018] The ventilation structure of this embodiment comprises a ventilation door 4 whose lower edge is hingedly rotatably attached to a ventilation opening 3 so as to open to the outside of the chicken coop 1, an opening / closing arm 5 extending into the chicken coop 1 from a position near the lower edge of the ventilation door 4, a first pulley 6 rotatably attached to the inside of the chicken coop 1 on the wall 2, and a second pulley 7 attached to the first pulley 6.

[0019] The ventilation structure also includes a first wire 8 having one end attached to the first pulley 6 and the other end attached to the ventilation door 4, a second wire 9 having one end attached to the second pulley 7 and the other end attached to the tip of the opening / closing arm 5, a motor 10 for rotating the first pulley 6, and a storage battery (not shown) capable of supplying power to the motor 10 in the event of a power outage.

[0020] Furthermore, the ventilation structure includes a first tension wire 11 having one end attached to the middle of the first wire 8, a first weight 12 attached to the other end of the first tension wire 11 and applying tension to the first wire 8, a second tension wire 13 having one end attached to the middle of the second wire 9, and a second weight 14 attached to the other end of the second tension wire 13 and applying tension to the second wire 9.

[0021] The wall body 2 of the chicken coop 1 includes a plurality of vertical members 2a extending in the vertical direction and spaced apart in the horizontal direction, a plurality of horizontal members 2b extending in the horizontal direction to connect the vertical members 2a and spaced apart in the vertical direction, and a flat wall panel 2c attached to the horizontal members 2b. The wall panel 2c is attached to the outer surface side of the chicken coop 1.

[0022] The ventilation opening 3 is formed by a horizontally long rectangular frame body 20. The frame body 20 is attached to the grid-like part surrounded by two vertical members 2a and two horizontal members 2b in the wall body 2. The frame body 20 includes a pair of side frames 20a extending vertically, an upper frame 20b connecting the upper ends of the pair of side frames 20a, and a lower frame 20c connecting the lower ends of the pair of side frames 20a. This frame body 20 has a flange portion 20d protruding into the frame and provided over the entire circumference of the inner peripheral surface. A packing 21 made of an elastic material is attached to the surface of the flange portion 20d facing outward of the chicken coop 1 (see Fig. 2(d)).

[0023] The ventilation door 4 is formed in a flat plate shape. The ventilation door 4 is arranged outside the chicken coop 1 with respect to the flange portion 20d within the frame of the frame body 20. The lower side of the ventilation door 4 is attached to the lower frame 20c by a plurality of hinges 22 such that the upper side rotates outward of the chicken coop 1 by the hinge to open. When the ventilation door 4 is in an upright state, the inner side surface 4a facing the inside of the chicken coop 1 abuts against the packing 21 attached to the flange portion 20d of the frame body 20. In this way, the ventilation door 4 can open and close the ventilation opening 3.

[0024] On the inner surface 4a of the ventilation door 4 inside the building, a first wire attachment portion 23 to which the other end of the first wire 8 is attached and the above-described opening and closing arm 5 to which the other end of the second wire 9 is attached are attached. The first wire attachment portion 23 is attached near the center in the vertical direction near both ends in the horizontal direction on the inner surface 4a of the ventilation door 4 inside the building. The opening and closing arm 5 is attached near the lower side at the center in the horizontal direction on the inner surface 4a of the ventilation door 4 inside the building. In other words, the first wire attachment portion 23 is attached on the side opposite to the lower side of the ventilation door 4 to which the hinge 22 is attached with respect to the opening and closing arm 5. At the tip of the opening and closing arm 5, a second wire attachment portion 24 composed of an eyebolt having an annular head is attached, and the other end of the second wire 9 is attached to this second wire attachment portion 24.

[0025] In the present embodiment, as shown in FIG. 2, the distance from the hinge center of the hinge 22 to the tip (second wire attachment portion 24) of the opening and closing arm 5 is configured to be shorter than the distance from the hinge center of the hinge 22 to the first wire attachment portion 23.

[0026] The motor 10 is attached to a portion above in the vertical direction and outward in the horizontal direction from the ventilation opening 3 in the wall body 2. This motor 10 is attached with its rotation shaft 10a directed in the horizontal direction. A first pulley 6 is attached to this rotation shaft 10a. The motor 10 of the present embodiment uses one that is difficult to rotate from the side of the first pulley 6 such as a gear motor or a motor with a brake.

[0027] The motor 10 is connected to commercial power and a storage battery (not shown) charged by the commercial power, and by operating an opening and closing switch (not shown), the first pulley 6 and the second pulley 7 can be rotated forward (the direction in which the first wire 8 wound around the first pulley 6 is paid out) or reversely.

[0028] Since the first pulley 6 is attached to the rotating shaft 10a of the motor 10, its axis is oriented in the lateral direction. A second pulley 7 is attached to the surface of the first pulley 6 on the side opposite to the motor 10. The second pulley 7 is attached to the first pulley 6 in a state where its center is eccentric with respect to the rotating shaft 10a.

[0029] In the present embodiment, the diameter of the second pulley 7 is smaller than the diameter of the first pulley 6. Further, as shown in Fig. 2(a), the second pulley 7 is eccentrically attached to the side of the portion where the first wire 8 is drawn out from the first pulley 6 with respect to the center of the first pulley 6 during normal times when commercial power is supplied. One end of the second wire 9 attached to the second pulley 7 is attached to a portion on the side opposite to the portion where the first wire 8 is drawn out from the first pulley 6 with respect to the center of the second pulley 7 during normal times.

[0030] One end of the first wire 8 is attached to the first pulley 6, the middle part is wound around the first pulley 6, and the other end is attached to the ventilation door 4 (first wire attachment part 23) from a direction intersecting the opening surface of the ventilation port 3. As shown in Fig. 2(a), the first wire 8 is wound around the first pulley 6 about one turn. Although detailed illustration is omitted, the first wire 8 branches into two from the middle of the way to the other end, and each other end is attached to two first wire attachment parts 23 attached to the ventilation door 4.

[0031] The first wire 8 extends downward from the first pulley 6 and is wound around a first guide pulley 25 provided at the same height as the upper frame 20b of the frame body 20, so as to extend laterally upward toward the ventilation port 3. The first guide pulley 25 is attached to a mounting member 26 protruding into the chicken coop 1 from the vertical member 2a.

[0032] Incidentally, as shown in Fig. 1, in the frame body 20, three horizontal guide inner members 27a, 27b, and 27c are attached to the upper frame 20b at intervals in the horizontal direction. The horizontal guide inner member 27a is attached to the horizontal end portion close to the first guide pulley 25 at both horizontal ends of the upper frame 20b. The horizontal guide inner member 27b is attached to the horizontal end portion far from the first guide pulley 25 at both horizontal ends of the upper frame 20b. The horizontal guide inner member 27c is attached to the horizontal center of the upper frame 20b. These horizontal guide inner members 27a, 27b, and 27c are eye bolts and are attached with the axial center of the annular portion facing the horizontal direction. Further, the horizontal guide inner members 27a, 27b, and 27c are attached to the attachment members 28 protruding from the upper frame 20b into the chicken coop 1 at their respective portions.

[0033] Also, a paddle member 29 extending horizontally is attached to the frame body 20 so as to connect the pair of side frames 20a to each other at the vertical center inside the chicken coop 1. Vertical guide inner members 30 each composed of an eye bolt with the axial center of the annular portion facing vertically are attached to the portions directly below the three horizontal guide inner members 27a, 27b, and 27c on the paddle member 29.

[0034] Then, the first wire 8 guided in the horizontal direction by the first guide pulley 25 branches into two, and each passes through the horizontal guide inner member 27a. One bends downward from the horizontal guide inner member 27a. The other first wire 8 passes through the horizontal guide inner member 27c and the horizontal guide inner member 27b and bends downward from the horizontal guide inner member 27b. Each of the first wires 8 bent downward from the horizontal guide inner member 27a and the horizontal guide inner member 27b passes through the vertical guide inner member 30 directly below it and then bends outward of the chicken coop 1 and is attached to the first wire attachment portion 23 of the ventilation door 4. Thereby, the first wire 8 is attached to the ventilation door 4 from a direction intersecting the opening surface of the ventilation port 3. Incidentally, slits through which the first wire 8 and the second wire 9 pass are formed in the paddle member 29.

[0035] The second wire 9 has one end attached to the second pulley 7 and the other end attached to the tip of the opening / closing arm 5 (second wire attachment portion 24) from the direction of the upper side of the ventilation opening 3. Specifically, the second wire 9 extends downward from the second pulley 7, is wound around the guide pulley 31, and then is wound around the second guide pulley 32 provided between the first guide pulley 25 and the wall body 2, thereby extending horizontally upward toward the ventilation opening 3 (see FIG. 1). The guide pulley 31 is attached to the attachment member 33 protruding from the vertical member 2a into the chicken coop 1. The second guide pulley 32 is attached to the attachment member 26.

[0036] Then, the second wire 9 passes through the horizontal guide member 27a and the horizontal guide member 27c, bends downward from the horizontal guide member 27c, and further passes through the vertical guide member 30 at the horizontal center and is attached to the tip of the opening / closing arm 5 (second wire attachment portion 24). Thereby, the second wire 9 is attached to the tip of the opening / closing arm 5 from the direction of the upper side opposite to the lower side at the ventilation opening 3.

[0037] One end of the first tension wire 11 is attached to the first wire 8 via a rod bar such as an oil-tempered wire, and extends outward in the horizontal direction from the ventilation opening 3 along the upper frame 20b of the frame body 20. Then, the first tension wire 11 extends downward by being wound around the first tension pulley 34 provided at the same height as the upper frame 20b outside the frame body 20 in the horizontal direction, and suspends the first weight 12 attached to the other end. The first tension pulley 34 is attached to the attachment member 35 protruding from the vertical member 2a into the chicken coop 1. Although detailed illustration is omitted, one end of the above rod bar is attached to the first wire 8 at a portion between the horizontal guide member 27a and the first guide pulley 25, extends horizontally therefrom through the three horizontal guide members 27a, 27b, 27c, and the other end is attached to the first tension wire 11 at a portion between the horizontal guide member 27b and the first tension pulley 34.

[0038] Similar to the first tension wire 11, one end of the second tension wire 13 is attached to the second wire 9 via a rod bar, and it extends outward in the lateral direction from the ventilation opening 3 along the upper frame 20b of the frame body 20. Then, the second tension wire 13 extends downward by being wound around a second tension pulley 36 provided between the first tension pulley 34 and the wall body 2, and suspends a second weight 14 attached to the other end. The second tension pulley 36 is attached to a mounting member 35.

[0039] Incidentally, the length that is fed out or wound up by the rotation of the first pulley 6 in the first wire 8, and the length that is wound up or fed out by the rotation of the second pulley 7 in the second wire 9 can be set according to the respective diameters of the first pulley 6 and the second pulley 7. On the other hand, the length to be fed out (the length of forward and backward movement) required to open and close the ventilation door 4 in the first wire 8 can be set according to the opening and closing angle of the ventilation door 4 and the respective positional relationships between the vertical guide member 30, the hinge center of the ventilation door 4, and the first wire attachment portion 23, in a state seen from the lateral direction. Also, the length of forward and backward movement required to open and close the ventilation door 4 in the second wire 9 can be set according to the opening and closing angle of the ventilation door 4 and the respective positional relationships between the vertical guide member 30, the hinge center of the ventilation door 4, and the second wire attachment portion 24, in a state seen from the lateral direction. And in this embodiment, based on the above relationships, the respective diameters of the first pulley 6 and the second pulley 7, the respective positions of the first wire attachment portion 23 and the second wire attachment portion 24, etc. are set.

[0040] Next, the ventilation method of the chicken coop 1 during a power outage by the ventilation structure of this embodiment will be described. In normal times when commercial power is supplied, as shown in FIGS. 1(a) and 2(a), the ventilation door 4 closes the ventilation opening 3 that penetrates the wall 2 of the chicken coop 1. In this state, the motor 10 stops while pulling the ventilation door 4 into the chicken coop 1 via the first wire 8 wound around the first pulley 6. That is, the ventilation door 4 is pressed against the packing 21 attached to the flange portion 20d of the frame body 20 forming the ventilation opening 3. Thereby, there is no gap between the ventilation opening 3 and the ventilation door 4, and light and wind do not enter the chicken coop 1 from the ventilation opening 3.

[0041] In this normal time, for example, as shown in FIG. 2, the first wire 8 is wound around the first pulley 6 in the clockwise direction, and the first wire 8 is fed out from the upper end side of the first pulley 6. On the other hand, in the second pulley 7, the second wire 9 is attached to and fed out from the lower end side thereof, and the second wire 9 is not wound. Therefore, when the motor 10 rotates the first pulley 6 in the clockwise direction (forward rotation), the first wire 8 is fed out from the first pulley 6 and the second wire 9 is wound around the second pulley 7.

[0042] Also, in normal times, as described above, since the first wire 8 pulls the ventilation door 4 into the chicken coop 1, there is no slack in the first wire 8. On the other hand, in the second wire 9, tension is applied by the second weight 14 to the portion on the second pulley 7 side rather than the portion where the second tension wire 13 is attached, so there is slack in the portion on the remaining opening and closing arm 5 side.

[0043] When the supply of commercial power stops (during a power outage), if an opening / closing switch (not shown) is opened, the motor 10 rotates forward so that the first wire 8 is drawn out from the first pulley 6 using the battery (not shown) as power. When the first pulley 6 and the second pulley 7 are rotated by the forward rotation of this motor 10, the force that pulls the ventilation door 4 into the chicken coop 1 by the first wire 8 slackens as the first wire 8 is drawn out from the first pulley 6. At the same time, the second wire 9 is wound around the second pulley 7, and the opening / closing arm 5 is pulled by the second wire 9 toward the vertical guide member 30 side.

[0044] Since this ventilation door 4 is closed in an upright state, even if the first wire 8 slackens, the ventilation door 4 does not immediately hinge-rotate in the opening direction. Then, as the tip of the opening / closing arm 5 is pulled by the second wire 9, it hinge-rotates 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 though they are driven by the same motor 10, the speed at which the second wire 9 is pulled by the second pulley 7 becomes slower than the speed at which the first wire 8 is drawn out and slackened by the first pulley 6. Also, in the second wire 9, as described above, since there is slack in the part on the opening / closing arm 5 side, even when winding by the second pulley 7 starts, the opening / closing arm 5 is not immediately pulled, and the timing of pulling the opening / closing arm 5 is delayed and shifted with respect to the start of drawing out the first wire 8. For these reasons, the force to open the ventilation door 4 by the second wire 9 is not obstructed by the first wire 8, and the ventilation door 4 is not damaged.

[0045] When the ventilation door 4 hinge-rotates from the vertical state to an angle of 60 degrees, the rotation of the motor 10 stops. As a result, the ventilation opening 3 is in an open state, and natural ventilation of the inside of the chicken coop 1 can be performed through the ventilation opening 3.

[0046] After that, when the supply of commercial power is resumed, if the switch is closed as a recovery operation, the motor 10 will reverse due to the commercial power, and by operating in the opposite manner to the above, the ventilation door 4 will hinge-rotate in the closing direction. Then, when the ventilation door 4 closes the ventilation opening 3, the rotation of the motor 10 stops and returns to the normal state. At this time, with the ventilation door 4 being pulled into the chicken coop 1 by the first wire 8, the motor 10 stops.

[0047] In this embodiment, since the first weight 12 and the second weight 14 apply tension to the first wire 8 and the second wire 9, when the first wire 8 and the second wire 9 are paid out by the forward and reverse rotations of the motor 10, the first wire 8 and the second wire 9 do not slacken, and the first wire 8 and the second wire 9 do not come off the first guide pulley 25 and the second guide pulley 32.

[0048] Note that when the supply of commercial power stops and a power outage occurs, the ventilation door 4 may automatically switch the power to the storage battery and the motor 10 may rotate forward so that the ventilation door 4 automatically opens. Also, when the supply of commercial power resumes after a power outage, the power may automatically switch to commercial power and the motor 10 may reverse so that the ventilation door 4 automatically closes.

[0049] Thus, according to the ventilation structure of this embodiment, in normal times when commercial power is supplied, since the ventilation door 4 that closes the ventilation opening 3 of the chicken coop 1 is pulled into the chicken coop 1 by the first wire 8, the ventilation door 4 is pressed against the ventilation opening 3, so it is possible to eliminate the gap between them, making it difficult for light and wind to enter the chicken coop 1 from the ventilation opening 3, and the environment inside the chicken coop 1 will not be damaged.

[0050] Also, in normal times, the first pulley 6 is not rotated by the motor 10, and since the ventilation door 4 does not open, there is no need to continuously supply power to the electromagnet as in the prior art, and an increase in the running cost of the chicken coop 1 can be suppressed.

[0051] Also, when the supply of commercial power stops, if the motor 10 is rotated (forward) in the direction in which the first wire 8 is paid out from the first pulley 6, the tension of the first wire 8 pulling the ventilation door 4 inward of the chicken coop 1 is loosened, and the ventilation door 4 can be opened. At this time, since the second pulley 7 rotates together with the first pulley 6, the second wire 9 is wound around the second pulley 7. Then, the tip of the opening and closing arm 5 is pulled by the second wire 9 in the direction of the upper side opposite to the lower side of the ventilation opening 3, and the ventilation door 4 rotates in the opening direction about the hinge. As a result, the ventilation door 4 can be opened to open the ventilation opening 3, so that natural ventilation can be performed inside the chicken coop 1 through the ventilation opening 3, and it is possible to prevent the inside of the chicken coop 1 from being in an oxygen-deficient state or the temperature inside the chicken coop 1 from rising and damaging the chickens.

[0052] Also, even if the ventilation door 4 becomes difficult to open due to aging or the like, since the motor 10 pulls the opening and closing arm 5 via the second wire 9 to rotate the ventilation door 4 about the hinge, the ventilation door 4 can be surely opened.

[0053] Furthermore, when the supply of commercial power resumes and the power outage is restored, if the motor 10 is reversed, the second pulley 7 rotates in the direction in which the second wire 9 is paid out, and the tension of the second wire 9 pulling the ventilation door 4 via the opening and closing arm 5 in the opening direction is loosened, and the ventilation door 4 can be closed. At this time, since the first wire 8 is wound around the first pulley 6, the ventilation door 4 is pulled by the first wire 8 in the closing direction, and the ventilation opening 3 can be closed. As a result, the normal state can be restored, and the restoration work after the power outage can be made easier.

[0054] Also, since the ventilation opening 3 is horizontally long, the ventilation efficiency is good compared to the case where it is vertically long. Also, since the ventilation opening 3 can be easily opened and closed only by rotating the motor 10 in a desired direction, regular inspection is easy.

[0055] Furthermore, since it is equipped with a storage battery that supplies power during a power outage, the ventilation door 4 can be opened by the motor 10 even during a power outage to open the ventilation opening 3. Also, since the first pulley 6 is rotated by the motor 10 to open the ventilation door 4, it becomes possible to provide an opening / closing switch for rotating the motor 10 at a position within easy reach of the hand, and the first pulley 6 etc. can be provided at a position (for example, a high position) that does not interfere with raising chickens. Furthermore, since it is only necessary to supply power from the storage battery to the motor 10 until the ventilation door 4 opens during a power outage, compared to the storage battery in the case of continuously supplying power to the ventilation fan during a power outage, a smaller-capacity storage battery can be used to handle the situation, and an increase in the cost associated with the ventilation structure can be suppressed.

[0056] As described above, the present invention has been described by giving preferred embodiments, but the present invention is not limited to the above embodiments, and various improvements and design changes are possible without departing from the gist of the present invention.

[0057] For example, in the above embodiment, the ventilation door 4 with the lower side rotatably attached by a hinge was shown, but it is not limited to this, and as shown in FIG. 3, the ventilation door 4 with the upper side rotatably attached by a hinge may also be used. The ventilation door 4 shown in FIG. 3 has its upper side attached to the upper frame 20b of the frame body 20 by a plurality of hinges 22 so that the lower side hinges and rotates outward from the chicken coop 1 to open. The embodiment of FIG. 3 is the upside-down version of the embodiment of FIG. 2, and the same components as above are given the same reference numerals and the description is omitted. In the ventilation structure of this embodiment as well, the same operational effects as above can be achieved.

[0058] Also, in the above embodiment, one motor 10 was shown for opening and closing one ventilation door 4 (ventilation opening 3), but it is not limited to this, and a plurality of ventilation openings 3 (ventilation doors 4) may be arranged in a row horizontally, and each ventilation door 4 may be connected by a first wire 8 and a second wire 9 so that a plurality of ventilation doors 4 can be opened and closed by one motor 10.

[0059] In addition, in the above-described embodiment, the motor 10 is shown to rotate the first pulley 6 and the second pulley 7 to open and close the ventilation door 4. However, the present invention is not limited to this, and the first pulley 6 and the second pulley 7 may be manually rotated to open and close the ventilation door 4.

[0060] Furthermore, in the above-described embodiment, the center of the second pulley 7 is shown to be eccentric with respect to the center of the first pulley 6. However, the present invention is not limited to this, and the center of the second pulley 7 may be coaxial with the center of the first pulley 6. Also, in the above-described embodiment, when the first pulley 6 is rotated in the direction in which the first wire 8 is paid out, the first wire 8 is paid out and at the same time the second wire 9 is wound around the second pulley 7. However, the present invention is not limited to this, and the second wire 9 may be paid out short from the second pulley 7 and then wound up.

[0061] In addition, in the above-described embodiment, the diameter of the second pulley 7 is shown to be smaller than the diameter of the first pulley 6. However, the present invention is not limited to this, and the diameters of the first pulley 6 and the second pulley 7 may be the same.

[0062] Also, in the above-described embodiment, the chicken coop 1 is shown as a livestock house using the ventilation structure of the present invention. However, the present invention is not limited to this, and it may be used in a cow shed, a pig shed, a stable, etc.

Claims

1. A ventilation structure that opens a ventilation opening penetrating the wall of a livestock barn during a power outage to allow natural ventilation, A ventilation door having a first side hingedly rotatable with respect to the ventilation opening so as to open to the outside of the livestock barn, and closing the ventilation opening in an openable and closable manner; An opening and closing arm extending into the livestock barn from a portion of the ventilation door close to the first side; A first pulley rotatably attached to the inside of the livestock barn on the wall; A second pulley attached to the first pulley; One end is attached to the first pulley, the middle is wound around the first pulley, and from a direction intersecting the opening surface of the ventilation opening, the other end is attached to a portion of the ventilation door on the side opposite to the first side with respect to the opening and closing arm, and a first wire that pulls the ventilation door in the direction of the livestock barn; One end is attached to the second pulley, and the other end is attached to the tip of the opening and closing arm from the direction of the second side opposite to the first side of the ventilation opening; It is characterized by comprising: When the first pulley is rotated in the direction in which the first wire is paid out from the first pulley, the second wire is wound around the second pulley, and the tip of the opening and closing arm is pulled by the second wire in the direction of the second side, so that the ventilation door hinges and rotates in the opening direction to open the ventilation opening. A ventilation structure characterized by the above.

2. A motor for rotating the first pulley; A storage battery capable of supplying power to the motor during a power outage; The ventilation structure according to claim 1, further comprising the above.

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