WO2023079624A1

WO2023079624A1 - Shutter opening/closing device

Info

Publication number: WO2023079624A1
Application number: PCT/JP2021/040579
Authority: WO
Inventors: 雄一郎森
Original assignee: 株式会社ハイテム
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2023-05-11
Also published as: CN118215629A

Abstract

A shutter opening/closing device (1) comprises: a pair of side surface plates (11); a shutter (20) provided between the pair of side surface plates (11); a pair of shutter support mechanisms (30) that attach the shutter (20) to the pair of side surface plates (11); and a linear body (40) for moving the shutter (20). The shutter support mechanism (30) includes: a long hole (31) that penetrates the side surface plates (11) and is long in the vertical direction; a movable shaft (32) that is rotatably and slidably inserted in the long hole (31) and integrally turns with the shutter (20); an arm (33) that extends out from the movable shaft (32) and has a linear body attachment part (33a) at the tip; and a coil spring (34) having an upper end attached to a site different than the movable shaft (32) of the arm (33), and a lower end attached to the side surface plate (11), the coil spring energizing the movable shaft (32) downward through the arm (33). The linear body (40) is attached to the linear attachment part (33a) from above.

Description

shutter opener

The present invention relates to a shutter opening/closing device that opens and closes the space above the conveying path in the wall opening through which the bar conveyor passes.

Many poultry farms use bar conveyors to transport eggs. Some bar conveyors pass through openings provided in the walls of facilities. This opening is preferably closed when no eggs are being conveyed by the bar conveyor. In particular, in the case of openings in walls that separate the inside and outside of a building, there is a high possibility that foreign objects such as dust and small animals may enter the building through the openings, so it is highly necessary to close the openings. .

Therefore, the applicant of the present application has proposed a shutter opening/closing device 100 that can easily close the space above the conveying path in the bar conveyor 120 as shown in FIG. 7 (see Patent Document 1). A detailed description of the structure disclosed in Japanese Patent Application Laid-Open No. 2002-200000 describes a pair of side plates 101 each having a pair of shutter supports 103 supporting a shutter 102 . Each shutter support 103 has a first arm 105 whose base end is pivotally supported on the side plate 101 by a first fixed shaft 104, an upper end fixed to the tip of the first arm 105, and a lower end fixed to the first fixed shaft. A coil spring 106 fixed to the side plate 101 below 104 and a second arm 108 having an upper end pivotally supported by a first pin 107 near the center of the first arm 105 and having an elongated hole 108h in the longitudinal direction. , a third arm 110 whose upper end is pivotally supported by a second pin 109 between the first fixed shaft 104 and the first pin 107 of the first arm 105, and a third arm 110 whose one end is supported by a third pin 111. , the other end is slidably supported in the long hole 108h by a fourth pin 112, and the middle is supported by the side plate 101 by a second fixed shaft 113. 114 and. And the shutter 102 is attached to the second arm 108 .

As shown in FIG. 7A, the shutter opening/closing device 100 of Patent Document 1 is attached to the second arm 108 when the shutter 102 closes the space above the conveying path (closed state). The lower end of the shutter 102 interferes with the stopped bar 121 . The tip of the first arm 105 is biased downward by a coil spring 106 . Therefore, the shutter 102 is pressed against the bar 121 from above via the second arm 108 by the biasing force of the coil spring 106, and the closed state is stably maintained.

When the bar 121 moves downstream due to the operation of the bar conveyor 120, the lower end of the shutter 102 is pushed by the bar 121 and moves downstream. As a result, the second arm 108 to which the shutter 102 is attached rotates around the first pin 107 (rotates clockwise in the drawing). As the bar 121 moves downstream, when the lower end of the shutter 102 separates from the bar 121, the shutter 102 cannot be pressed against the bar 121. Therefore, the biasing force of the coil spring 106 causes the first arm 105 to move. The tip rotates around the first fixed shaft 104 at once so as to move downward.

As a result, the third arm 110 descends as the second pin 109 attached to the first arm 105 descends, and the fourth arm 114 rotates around the second fixed shaft 113 via the third pin 111. do. As a result, the second arm 108 rotates upward around the first pin 107 while sliding the fourth pin 112 along the long hole 108h in a direction approaching the first pin 107 . Accordingly, the shutter 102 rotates around the first pin 107 together with the second arm 108, and the space above the transport path is opened (open state) (see FIG. 7B).

In addition, the shutter opening/closing device 100 of Patent Document 1 has a pair of side plates 101 attached to the lower ends thereof, and a pair of support members 115 extending upward from the side plates 101 and a pair of support members 115 extending upward from the side plates 101 . A beam 116 connecting the upper ends of the beams 116, a pulley 117 attached to the center and one end of the beam 116, and a connecting arm (illustrated are omitted) and a wire 118 fastened to the center of the connecting arm (see FIG. 7(a)). The wire 118 extends upward from the connecting arm, is wound around a pulley 117 at the center of the beam 116, and then is wound around a pulley at the end of the beam 116 and extends downward. A grip (not shown) is attached to the .

When the open state is changed to the closed state, when the grip attached to the lower end of the wire 118 is grasped and pulled downward, the tip of the first arm 105 moves upward via the wire 118 and the connecting arm. rotates around the first fixed shaft 104 . As a result, an operation opposite to that described above is performed, and a closed state is obtained in which the lower end of the shutter 102 is inserted between the adjacent bars 121 . Thus, according to the technique disclosed in Patent Document 1, it is possible to easily close the space above the conveying path in the bar conveyor 120 .

By the way, in the technique of Patent Document 1, in the first arm 105 to which the coil spring 106 is fixed at the tip, the first pin 107 is placed near the center between the tip and the first fixed shaft 104, and the first pin 107 and the Since the second pin 109 is provided between the one fixed shaft 104 and the first pin 107 and the second pin 109 according to the principle of leverage, a strong force twice or more than the biasing force of the coil spring 106 acts on the first pin 107 and the second pin 109. The force causes the shutter 102 to open. Further, in the technique of Patent Document 1, the shutter 102 is rotated by a link mechanism composed of the first arm 105, the second arm 108, the third arm 110, and the fourth arm 114. FIG. For this reason, in order to change the shutter 102 from the open state to the closed state, it is necessary to apply a force considerably stronger than the urging force of the coil spring 106, and there is a possibility that the closed state cannot be achieved depending on the operator.

Japanese Patent No. 6472542

Therefore, in view of the above circumstances, it is an object of the present invention to provide a shutter opening/closing device that can be easily closed with a relatively weak force.

In order to solve the above problems, the shutter opening/closing device according to the present invention includes:
"A pair of side plates,
a shutter provided between the pair of side plates;
a pair of shutter support mechanisms that respectively attach the shutters to the pair of side plates;
a linear body for moving the shutter by the pair of shutter support mechanisms;
Each of the shutter support mechanisms includes:
a long hole penetrating through the side plate and elongated in the vertical direction;
a movable shaft rotatably and slidably inserted through the elongated hole, fixed to a side edge of the shutter, and rotating integrally with the shutter;
an arm extending from the movable shaft along the side plate and having a linear body mounting portion at a distal end remote from the movable shaft;
An upper end of the arm is attached to a portion between the movable shaft and the linear body attachment portion, and a lower end is attached to a portion of the side plate below the elongated hole. a coil spring biasing the movable shaft downward through
The linear bodies are attached to the pair of linear body mounting portions from above, respectively."
It is characterized by

Below, the state in which the lower end of the shutter is inserted between two adjacent bars in the bar conveyor, that is, the state in which the lower end of the shutter interferes with the bar and the space above the conveying path is closed by the shutter is called a "closed state", and the state in which the shutter is separated from the bar and the space above the transport path is released is called an "open state".

In this configuration, when the shutter is in the closed state, the movable shaft is positioned at the lower end of the long hole due to the biasing force of the coil spring via the arm. Since the upper end of the coil spring is attached to a portion between the tip of the arm and the movable shaft, a force acts to rotate the movable shaft in a direction in which the tip of the arm moves downward. At this time, since the lower end of the shutter that rotates integrally with respect to the movable shaft is inserted between the two bars, even if the shutter attempts to rotate about the movable shaft, the bar on the downstream side in the conveying direction will not move. rotation is prevented by abutting on the For this reason, the closed state is stably maintained.

On the other hand, in the operation from the closed state to the open state, when the bar on the conveying path moves downstream due to the operation of the bar conveyor, the biasing force of the coil spring acts on the shutter via the arm to rotate it. Therefore, the shutter rotates around the movable shaft so that the lower end moves downstream as the bar moves. When the bar moves further downstream and the lower end of the shutter separates from the bar, the urging force of the coil spring rotates the arm so that the tip moves downward, and the movable shaft moves the lower end of the shutter upward. It rotates around and becomes an open state.

To change from the open state to the closed state, pull the linear body. Specifically, the linear body is attached to the linear body mounting portion of the arm from above. Therefore, when the linear body is pulled against the urging force of the coil spring, the movable shaft rotates in the direction in which the tip of the arm moves upward. The shutter, which rotates integrally with the rotation of the movable shaft, rotates so that its lower end faces downward. After that, when the lower end of the shutter comes into contact with the bar, the rotation of the shutter is blocked. When the linear body is further pulled in this state, the movable shaft slides upward in the elongated hole via the arm. Along with this upward sliding, the portion of the lower end of the shutter that is in contact with the bar moves, and the shutter rotates around the movable shaft along with this movement. Then, when the movable shaft slides further upward and the lower end of the shutter separates from the bar, the shutter rotates further and stabilizes in a substantially vertical state.

When the linear body is returned in this state, the biasing force of the coil spring causes the movable shaft to slide downward in the long hole, and the shutter moves downward together with the movable shaft. This inserts the lower end of the shutter between the two bars. When the lower end of the shutter is pressed against the bar, or when the movable shaft slides to the lower end of the long hole, the movable shaft cannot be slid any further downward, but the movable shaft can rotate. The movable shaft rotates so as to move downward. The rotation of the movable shaft causes the shutter to rotate so that the lower end moves upward, and the lower end abuts the bar on the downstream side, restricting the rotation of the shutter and closing the shutter.

Thus, according to this configuration, since the upper end of the coil spring is attached to the arm fixed to the shutter through the movable shaft, the shutter is urged to the open state with substantially the same urging force as the urging force of the coil spring. ing. When the shutter is to be closed, the linear body attached to the linear body mounting portion of the arm is lifted up. It becomes possible. In other words, it is not necessary to apply a force considerably stronger than the urging force of the coil spring as in the conventional art. As a result, it is possible to easily close the door with a relatively weak force, and even a weak operator can reliably bring the door closed.

As described above, according to the present invention, it is possible to provide a shutter opening/closing device that can be easily closed with a relatively weak force.

1A is a perspective view showing a closed state of a shutter opening/closing device according to an embodiment of the present invention, and FIG. 1B is a perspective view showing an open state of the shutter opening/closing device in FIG. It is sectional drawing of the state of Fig.1 (a). It is sectional drawing of the state of FIG.1(b). (a) is a cross-sectional view showing a state in which the shutter is rotating from an open state to a closed state, and (b) is a state in which the shutter is further rotated and raised from the state of (a). FIG. 4C is a cross-sectional view showing a closed state by lowering the shutter from the state of FIG. FIG. 2 is an explanatory view showing a cross section of a range of movement of a bar that can bring the shutter opening/closing device of FIG. 1 into a closed state; 2 is a cross-sectional view showing a state in which an electric closing mechanism is attached to the shutter opening/closing device of FIG. 1; FIG. It is explanatory drawing which shows typically the closed state of the conventional shutter opening/closing apparatus, (b) is explanatory drawing which shows typically the open state of the conventional shutter opening/closing apparatus in (a).

A shutter opening/closing device 1, which is a specific embodiment of the present invention, will be described below with reference to FIGS. 1 to 5. FIG. The shutter opening/closing device 1 is a device for opening and closing a space 66 above a conveying path 64 in a bar conveyor 60 passing through an opening 71 in a wall 70 . Here, the shutter opening/closing device 1 is attached to a bar conveyor 60 used in a poultry farming facility, and the case where the object to be conveyed by the bar conveyor 60 is an egg E is exemplified, but the place of use is limited to the poultry farming facility. However, the transported object is not limited to the egg E.

First, the bar conveyor 60 will be explained. The bar conveyor 60 includes a pair of conveyor frames 61 that are long in the conveying direction, a pair of endless chains 62 wound around a pair of sprockets (not shown) between the pair of conveyor frames 61, and a pair of endless chains. 62 and a number of bars 63 bridged at regular intervals. A large number of bars 63 move as the pair of endless chains 62 move in the same direction at the same speed. Then, on the circulating bar conveyor 60, a large number of bars 63 move in the direction (arrow A direction in the figure) from the sprockets that revolve from bottom to top toward the sprockets that revolve from top to bottom. A transport path 64 is formed on which the egg E is placed and transported. On the other hand, a return path 65 is formed by a large number of bars 63 that move in the opposite direction (illustration, arrow B direction). The bar conveyor 60 shown in this embodiment is of a horizontally installed type. Note that FIG. 1 shows only a portion of the long bar conveyor 60 near the wall 70 . In addition, hereinafter, the terms "upstream" and "downstream" refer to upstream and downstream in the conveying path 64, respectively, unless otherwise specified.

The shutter opening/closing device 1 includes an apparatus main body 10 attached to a bar conveyor 60, a shutter 20 arranged inside the apparatus main body 10, a shutter support mechanism 30 attaching the shutter 20 to the apparatus main body 10, and a shutter support mechanism. and a linear body 40 for moving the shutter 20 by 30 .

The device main body 10 includes a pair of side plates 11, a top plate 12 connecting the upper edges of the pair of side plates 11, a lower wall plate 13 connecting the bottoms of the pair of side plates 11, and a top plate. and a middle wall plate 14 provided to connect the pair of side plates 11 between 12 and the lower wall plate 13 .

The apparatus main body 10 also includes a pair of mounting members 15 mounted on the top plate 12, a pair of upper guide members 16 mounted on each of the pair of mounting members 15, and lower portions of the pair of side plates 11. A pair of lower guide members 17 respectively attached, a pair of lateral plates 18 respectively attached to the pair of side plates 11 and an upper plate 19 attached to the top plate 12 are further provided.

The pair of side plates 11 are formed such that their vertical dimensions are longer than the vertical dimensions of the conveyor frame 61 . The pair of side plates 11 are arranged on the outer side surfaces of the pair of conveyor frames 61 in a state in which the respective upper end sides protrude upward from the conveyor frame 61 and the respective lower end sides protrude downward from the conveyor frame 61 . Mounted individually.

The top plate 12 is a rectangular flat plate elongated in the direction in which the pair of side plates 11 are separated from each other. The top plate 12 has two long sides bent downward. An upper wall plate 12 a having a crank-shaped cross section is attached to the lower surface of the top plate 12 .

The lower wall plate 13 is formed in a C-channel shape with a downwardly open cross section. The lower wall plate 13 is attached to the pair of side plates 11 under the bar conveyor 60, and a part of the upper surface protrudes between the pair of conveyor frames 61 from below. In this embodiment, the lower wall plate 13 is formed so as to be separable into two at the center in the conveying direction.

The inner wall plate 14 has an inverted L-shaped cross section and is attached to the side plate 11 so as to sandwich the conveyor frame 61 . The inner wall plate 14 is attached so that the L-shaped horizontally extending portion is positioned within a closable range L of the shutter 20, which will be described later.

The pair of mounting members 15 corresponds to the part where the side plate 11 is extended upward near the edge of the top plate 12 on the upstream side in the transport direction. The upper guide member 16 has an annular portion 16a. The upper guide member 16 is attached to the mounting member 15 so that the central axis of the annular portion 16a is oriented vertically, and the central axis of the upper guide member 16 extends over an arm 33, which will be described later. The lower guide member 17 has an annular portion 17a. The lower guide member 17 is attached to the lower corner (here, the lower corner on the downstream side in the conveying direction) of the side plate 11 with the central axis of the annular portion 17a directed in the vertical direction. The annular portion 16a and the annular portion 17a are so-called eyebolt heads.

The pair of horizontal plates 18 are flat plates extending outward in a direction perpendicular to the side plates 11 and also extending upward from the side plates 11 . The pair of horizontal plates 18 are attached so as to match the edges of the side plates 11 on the upstream side in the conveying direction. The upper plate 19 is attached to the top plate 12 and the pair of horizontal plates 18 so as to connect portions of the pair of horizontal plates 18 that extend upward from the side plates 11 .

The shutter 20 is flat. The shutter 20 has a lower end curved in a U shape toward the downstream side in the transport direction. The curved U-shape (semi-arcuate shape) at the lower end of the shutter 20 has a diameter larger than the distance between two adjacent bars 63 . As a result, the lower end of the shutter 20 does not pass through between the bars 63 from above and drop downward. In this embodiment, the U-shaped lower end of the shutter 20 has a polygonal shape, but it may have a smooth semicircular shape. The upper end of the shutter 20 is bent at a right angle toward the downstream side in the transport direction. The shutter 20 has a pair of shaft fixing pieces 20a extending from near the upper end of both sides in the opposite direction (upstream side in the transport direction) to the curved direction at the lower end. A movable shaft 32, which will be described later, is fixed to the shaft fixing piece 20a.

The shutter support mechanism 30 is provided on each of the pair of side plates 11 . That is, there is a pair of shutter support mechanisms 30 . The shutter support mechanism 30 includes an elongated hole 31 penetrating the side plate 11 and elongated in the vertical direction, a movable shaft 32 rotatably and slidably inserted through the elongated hole 31 , and a shaft extending from the movable shaft 32 to the side plate 11 . and a coil spring 34 that biases the movable shaft 32 downward via the arm 33 .

The elongated hole 31 is formed near the upper end of the side plate 11 on the upstream side with respect to the center in the conveying direction. One end of the movable shaft 32 is fixed inside the pair of side plates 11 to shaft fixing pieces 20a provided on the sides of the shutter 20 so as not to rotate relative to each other, and the other end is long. It protrudes outside the side plate 11 through the hole 31 . That is, the shutter 20 rotates around the axis of the movable shaft 32 together with the movable shaft 32 . A disk-shaped closing plate 35 that can close the long hole 31 is inserted through the movable shaft 32 so as to be in contact with the outer surface of the side plate 11 . The closing plate 35 slides up and down together with the movable shaft 32 while keeping the long hole 31 closed to prevent foreign objects and small animals from entering the building through the long hole 31 .

The arm 33 is fixed so as to rotate integrally with a portion of the movable shaft 32 that protrudes outward from the side plate 11 . The arm 33 extends from the movable shaft 32 to the upstream side in the conveying direction, and is provided with a linear body attachment portion 33a at the distal end far from the movable shaft 32 . The arm 33 is fixed so that the line extending from the movable shaft 32 side to the tip extends obliquely upward at an angle of about 30 degrees with respect to the horizontal when the shutter 20 is vertical.

The coil spring 34 has an upper end attached to a portion of the arm 33 between the movable shaft 32 and the linear body attachment portion 33a, and a lower end attached to a portion of the side plate 11 below the elongated hole 31. . In addition to urging the movable shaft 32 downward via the arm 33, the coil spring 34 has its upper end attached to a portion of the arm 33 upstream of the movable shaft 32 in the conveying direction. The lower end of the shutter 20 biases the shutter 20 to rotate in a direction (clockwise direction in FIG. 2 and the like) in which the lower end of the shutter 20 moves upward on the downstream side of the transport direction from the movable shaft 32 . The length of the coil spring 34 is set so that the lower end thereof is located between the conveying path 64 and the return path 65 of the bar conveyor 60 in the open state. When a stopper is provided to prevent the shutter 20 from rotating upward from the open state, the length of the coil spring 34 is made shorter than the above, and the shutter 20 is brought into contact with the stopper by its urging force. The open state may be maintained.

One end of the linear body 40 passes through one annular portion 16a of the pair of upper guide members 16 and is attached to the linear body mounting portion 33a of the lower arm 33 from above. is attached to the linear body attachment portion 33a of the lower arm 33 from above through the annular portion 16a of the other upper guide member 16. As shown in FIG. That is, the pair of arms 33 are connected by one linear body 40 passing above the top plate 12 . Therefore, when the center of the linear body 40 is pulled, the pair of arms 33 can be pulled upward. As the linear body 40, a cord, a rope, and a wire can be exemplified.

By the way, when the bar conveyor 60 is installed at a high position, if the linear body 40 passes above the top plate 12, it becomes difficult to pull the linear body 40. Therefore, the linear body 40 may pass under the lower wall plate 13 as indicated by the chain double-dashed line in FIG. 1(b). The linear body 40 of this example extends upward through the annular portion 17a of the lower guide member 17 from below, and then passes through the annular portion 16a of the upper guide member 16 from above to the linear body mounting portion 33a of the arm 33. installed. A grip 41 for pulling the linear body 40 is provided at the center of the linear body 40 . Accordingly, when the grip 41 is gripped and pulled, the pair of arms 33 can be pulled upward via the lower guide member 17 and the upper guide member 16 . Therefore, when applied to the bar conveyor 60 installed at a high position, since the grip 41 for pulling the linear body 40 is provided below the bar conveyor 60, the linear body 40 can be easily pulled.

The shutter opening/closing device 1 of this embodiment is attached to the bar conveyor 60 by attaching the pair of side plates 11 to the outer side surfaces of the pair of conveyor frames 61 . The shutter opening/closing device 1 is attached to the bar conveyor 60 in a state in which the lower wall plate 13, the pair of horizontal plates 18, and the upper plate 19 of the device main body 10 are in contact with the wall 70, so that the opening 71 around the bar conveyor 60 is closed. can be closed. The pair of horizontal plate 18 and upper plate 19 may be fixed to the wall 70 with screws after they are brought into contact with the wall 70 .

When the shutter opening/closing device 1 is attached to the bar conveyor 60, the space 66 above the conveying path 64 is surrounded by the pair of side plates 11 and top plate 12, and the space 66 can be opened and closed by the shutter 20. can be done. When the shutter opening/closing device 1 is attached to the bar conveyor 60, the space below the return path 65 is closed by the lower wall plate 13, and the space between the conveying path 64 and the return path 65 is an intermediate wall. It is closed by plate 14 .

Next, the opening/closing operation of the shutter 20 in the shutter opening/closing device 1 of this embodiment will be described. In this embodiment, when the shutter 20 is closed, the movable shaft 32 is positioned near the lower end of the long hole 31 by the biasing force of the coil spring 34 via the arm 33, as shown in FIG. Since the upper end of the coil spring 34 is attached to a portion between the tip of the arm 33 and the movable shaft 32, the force to rotate the movable shaft 32 in the direction in which the tip of the arm 33 moves downward is generated. working. At this time, since the lower end of the shutter 20, which rotates integrally with the movable shaft 32, is inserted between the two bars 63, even if the shutter 20 tries to rotate around the movable shaft 32, it will not move in the conveying direction. The rotation is prevented by abutting against a bar 63 on the downstream side of the . For this reason, the closed state is stably maintained.

On the other hand, when the bar 63 on the conveying path 64 moves downstream due to the operation of the bar conveyor 60, the shutter 20 is moved around the movable shaft 32 by the biasing force of the coil spring 34 via the arm 33. As the bar 63 moves, the shutter 20 rotates about the movable shaft 32 so that the lower end moves downstream. When the bar 63 moves further downstream and the lower end of the shutter 20 separates from the bar 63, the biasing force of the coil spring 64 rotates the arm 33 so that the tip moves downward, and the lower end of the shutter 20 moves upward. It rotates about the movable shaft 32 so as to go to the open state (see FIG. 3).

When switching from the open state to the closed state, the operator pulls the linear body 40 by hand. More specifically, both ends of the linear body 40 are attached from above to the linear body mounting portions 33a of the arms 33 provided outside the pair of side plates 11, respectively. Therefore, when the center of the linear body 40 is pulled against the biasing force of the coil spring 34, the movable shaft 32 rotates in the direction in which the tip of each arm 33 moves upward. The shutter 20, which rotates integrally with the rotation of the movable shaft 32, rotates so that its lower end faces downward (see FIG. 4A).

After that, when the lower end of the shutter 20 contacts the bar 63, the rotation of the shutter 20 is blocked. When the linear body 40 is further pulled in this state, the movable shaft 32 slides upward in the elongated hole 31 via the arm 33 (see FIG. 4B). Along with this upward sliding, the portion of the lower end of the shutter 20 that is in contact with the bar 63 moves, and the shutter 20 rotates around the movable shaft 32 along with this movement. Then, when the movable shaft 32 slides further upward and the lower end of the shutter 20 separates from the bar 63, the shutter 20 rotates further and stabilizes in a substantially vertical state.

When the linear body 40 is returned (released) in this state, the biasing force of the coil spring 34 causes the movable shaft 32 to slide downward in the elongated hole 31 and the shutter 20 moves downward together with the movable shaft 32 . Thereby, the lower end of the shutter 20 is inserted between the two bars 63 (see FIG. 4(c)). When the lower end of the shutter 20 is pressed against the bar 63 or when the movable shaft 32 slides to the lower end of the elongated hole 31, the movable shaft 32 cannot be slid further downward, but can rotate. The force causes the movable shaft 32 to rotate so that the tip of the arm 33 moves downward. The rotation of the movable shaft 32 rotates the shutter 20 so that the lower end moves upward, and the lower end abuts the bar 63 on the downstream side to restrict the rotation of the shutter 20 and close the shutter 20 .

As described above, the shutter 20 is urged by the coil spring 34 to rotate toward the open state. Rotation to the open state is restricted while they are in contact with each other. In this embodiment, as shown in FIG. 5, the closable range L where the lower end of the shutter 20 contacts the bar 63 is set to be at least twice the distance between the adjacent bars 63. . Therefore, the shutter 20 can be closed at any timing when the bar conveyor 60 is stopped. In other words, there is no need to adjust the timing of stopping the bar conveyor 60 in order to close the space 66 above the conveying path 64, and the closed state can be ensured.

In the above embodiment, the bar conveyor 60 penetrating the wall 70 has the shutter opening/closing device 1 attached to the downstream side of the wall 70 in the conveying direction. The shutter opening/closing device 1 may be attached on the upstream side in the direction. In this case, a pair of horizontal plate 18 and upper plate 19 are attached so as to match the edges of the side plate 11 and top plate 12 on the downstream side in the conveying direction. Also, the lower guide member 17 is attached to the lower corner of the side plate 11 on the upstream side in the transport direction. As a result, for example, when the bar conveyor 60 penetrates the building of the poultry farm, the shutter opening and closing devices 1 provided on both the entrance side and the exit side of the building in the bar conveyor 60 can be installed inside the building. can be provided.

As described above, according to the shutter opening/closing device 1 of the present embodiment, since the upper end of the coil spring 34 is attached to the arm 33 fixed to the shutter 20 via the movable shaft 32, the shutter 20 is attached to the coil spring 34. It is biased to the open state with approximately the same force as the force. When the shutter 20 is closed, since the linear body 40 attached to the linear body mounting portion 33a of the arm 33 is lifted, a slightly stronger force than the biasing force of the coil spring 34 is applied. It can be lifted by itself. In other words, it is not necessary to apply a force considerably stronger than the urging force of the coil spring 34 as in the conventional art. As a result, it is possible to easily close the door with a relatively weak force, and even an operator with weak force can reliably close the door.

Further, the upper end of the coil spring 34 is attached to the arm 33 fixed to the shutter 20 to rotate the shutter 20, and the first arm 105 to the fourth arm 114 are arranged to rotate the shutter 102 as in the conventional art. Compared to the shutter opening/closing device 100 that requires a plurality of arms, the number of parts is small, so the cost of the shutter opening/closing device 1 can be reduced.

By the way, the conventional shutter opening/closing device 100 opens and closes the shutter 102 by means of a link mechanism with a plurality of arms of the first arm 105 to the fourth arm 114. Therefore, when it is used for the bar conveyor 120 with different inclination angles, the inclination It was necessary to change the length of each arm according to the angle, and it was not possible to divert the parts. On the other hand, in the shutter opening/closing device 1 of the present embodiment, the shutter 20 is opened and closed by the long hole 31 and the arm 33 fixed to the movable shaft 32. It can be used for bar conveyors 60 with different angles. That is, it can be used for the horizontal installation type bar conveyor 60 and the inclined installation type bar conveyor, and can flexibly cope with changes in the construction environment.

In addition, the conventional shutter opening/closing device 100 has two pulleys 117 attached to beams 116 provided above the pair of side plates 101, and a wire 118 wound around the pulleys 117 to close the shutter 102. Since the shutter opening/closing device 100 is designed to be rotated outward, the size of the shutter opening/closing device 100 is large, and a large space for installation is required. Moreover, the conventional shutter opening/closing device 100 was attached to the wall of the poultry farm. For these reasons, the conventional shutter opening/closing device 100 sometimes interferes with the ceiling, beams, etc. of the poultry farming facility and cannot be installed. On the other hand, the shutter opening/closing device 1 of the present embodiment does not have the strut member 115 extending above the side plate 101 or the side plate 101 provided above the side plate 101 like the conventional shutter opening/closing device 100 . Since the beam member 116 and the pulley 117 are not provided, the size is smaller than that of the conventional shutter opening/closing device 100 . Since the shutter opening/closing device 1 of this embodiment is mounted on the bar conveyor 60, it can be mounted in a narrow space regardless of the mounting position.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to the above embodiments, and various improvements and design changes are possible without departing from the scope of the present invention. is.

For example, in the above embodiment, an operator manually pulls the linear body 40 to bring it into the closed state. However, the present invention is not limited to this. An electric closing mechanism 50 for pulling may be provided. The electric closing mechanism 50 includes a rotating plate 51 provided above the top plate 12 with the rotation axis directed in the direction in which the pair of side plates 11 are separated, a motor 52 for rotating the rotating plate 51, A bracket 53 that supports a rotating plate 51 and a motor 52 and is attached to the apparatus main body 10 , a first rotating shaft 54 attached to the bracket 53 above the rotating plate 51 , and a first rotating shaft 54 A first arm 55 whose proximal end is pivotally supported by and whose distal end extends upstream in the conveying direction, a second rotating shaft 56 attached to the distal end of the first arm 55, a second rotation a second arm 57 pivotally supported by a driving shaft 56; a spring 58 biasing a base end portion of the second arm 57 near the second rotation shaft 56 toward the first rotation shaft 54; a third arm 59 connecting the proximal end of the first arm 55 opposite to the distal end of the first rotating shaft 54 and the eccentric shaft 51a eccentric from the center of rotation of the rotating plate 51; I have. In the electric closing mechanism 50 , the central portion of the linear body 40 is attached to the tip of the second arm 57 .

In the electric closing mechanism 50, the eccentric shaft 51a is positioned near the top dead center of the rotating plate 51 when the shutter 20 is in the open state. In this state, the base end of the first arm 55 is positioned above the first rotation shaft 54 by the third arm 59 attached to the eccentric shaft 51a, and the tip on the opposite side is first rotated. It is located below the drive shaft 54 and approaches the top plate 12 . Further, the second arm 57 has its tip located above the extension line of the first arm 55 due to the biasing force of the spring 58 . In this closed state, the tip of second arm 57 does not pull linear body 40, and linear body 40 is slack.

When the open state is changed to the closed state, the rotating plate 51 is rotated by the motor 52, and along with the rotation, the eccentric shaft 51a near the top dead center moves downward toward the bottom dead center. The proximal end of the first arm 55 moves downward via the third arm 59 attached to the core shaft 51a. As a result, the first arm 55 rotates around the first rotation shaft 54 in a direction in which the tip moves upward, and the second arm 57 also moves upward together with the tip of the first arm 55 . As the second arm 57 moves upward, the slack in the linear body 40 is reduced, and eventually the linear body 40 is stretched and pulled upward (the two-dot chain line in FIG. 6). ).

As the linear body 40 is pulled by the upward movement of the second arm 57 , the shutter 20 rotates from the open state to the closed state against the biasing force of the coil spring 34 . slide up along the When the rotation of the rotating plate 51 causes the eccentric shaft 51a to cross the bottom dead center and move toward the top dead center, the second arm 57 moves downward by the operation opposite to the above, and the linear body 40 is moved. returned. As a result, the shutter 20 is slid downward by the urging force of the coil spring 34 and then rotated around the movable shaft 32 so that the lower end of the shutter 20 comes into contact with the bar 63 on the downstream side and is closed. After that, when the eccentric shaft 51a reaches near the top dead center, the rotation of the rotating plate 51 by the motor 52 stops. A sensor for detecting the rotational position of the rotary plate 51, the rotational position of the first arm 55, and the like may be provided to stop the rotation of the motor 52. FIG.

By the way, when the linear body 40 is attached to the tip of the first arm 55, the movable shaft 32 comes into contact with the upper end of the long hole 31 while the tip of the first arm 55 is rising, causing the linear body 40 to be stretched. As a result, the linear body 40 prevents the tip of the first arm 55 from rising, and the first arm 55 may be damaged. On the other hand, in the present embodiment, since the linear body 40 is attached to the tip of the second arm 57, if the tip of the first arm 55 is further raised while the linear body 40 is stretched, the second arm 57 rotates around the second rotation shaft 56 against the biasing force of the spring 58 . As a result, the tip of the first arm 55 is allowed to rise, and the first arm 55 is not damaged.

It should be noted that the electric closing mechanism 50 can also be provided below the lower wall plate 13 in a state in which it is turned upside down. Accordingly, even when the linear body 40 passes under the lower wall plate 13 , the linear body 40 can be pulled by the electric closing mechanism 50 .

By providing the electric closing mechanism 50 in this way, it is possible to close the shutter 20 in conjunction with the stoppage of the bar conveyor 60, and the automation of the equipment can be achieved. In addition, if the electric closing mechanism 50 does not operate due to a failure, power failure, or the like, the operator can pull the linear body 40 to close it as described above, and it is possible to respond to emergencies. . In addition, as described above, since the closed state can be achieved with a weaker force than in the conventional art, even a small motor 52 can be used, and an increase in cost can be suppressed.

In the above embodiment, both ends of one linear body 40 are attached to the linear body mounting portions 33a of the pair of arms 33, respectively. The ends of two separate linear bodies 40 may be attached to the linear body mounting portion 33a, and the two linear bodies 40 may be bundled and pulled together.

Claims

a pair of side plates;
a shutter provided between the pair of side plates;
a pair of shutter support mechanisms that respectively attach the shutters to the pair of side plates;
a linear body for moving the shutter by the pair of shutter support mechanisms;
Each of the shutter support mechanisms includes:
a long hole penetrating through the side plate and elongated in the vertical direction;
a movable shaft rotatably and slidably inserted through the elongated hole, fixed to a side edge of the shutter, and rotating integrally with the shutter;
an arm extending from the movable shaft along the side plate and having a linear body mounting portion at a distal end remote from the movable shaft;
An upper end of the arm is attached to a portion between the movable shaft and the linear body attachment portion, and a lower end is attached to a portion of the side plate below the elongated hole. a coil spring biasing the movable shaft downward through
A shutter opening/closing device, wherein the linear bodies are attached to a pair of the linear body mounting portions from above, respectively.