Conveyor for poultry farming facility and method of use thereof

Abstract

Provided is a conveyor (1) for conveying an object to be conveyed from a first space to a second space which are partitioned by a wall in a poultry facility, the object being conveyed via an opening that is provided in the wall. A conveyor frame (10) of the conveyor (1) is installed on a plurality of rollers (20). The rotation of a freely rotatable long screw shaft (41), which is supported such that the axial direction thereof is parallel to the conveyance direction of the conveyor (1), is transmitted to the conveyor frame (10) by way of a nut (42) and a nut fixing portion (43), thereby moving the entire conveyor frame (10), which supports a conveyance route constituent member, in the forward and backward directions.

Description

[Technical field]

[0001] The present invention relates to a conveyor for transporting chicken droppings and eggs in a poultry farm, and a method for using the conveyor. [Background technology]

[0002] In large poultry farms, various conveyors are used, such as belt conveyors for transporting the waste (chicken manure) of caged birds, plate conveyors for transporting and drying the manure, and bar conveyors for transporting eggs produced by caged birds. These conveyors are sometimes arranged so that the transport path formed by the conveyor passes through multiple spaces partitioned by walls. In other words, the transport path of the conveyor may be used so as to pass through openings provided in the walls.

[0003] In such a case, it is desirable that the opening is not open when the conveyor is not in use. In particular, in the case of an opening provided in a wall separating the interior space from the exterior space of a building, there is a high possibility that foreign objects such as dust or small animals may enter the building through the opening.

[0004] Therefore, the applicant has already proposed a shutter device that can open and close the space above the conveying path at an opening provided in a wall when a bar conveyor passes through the opening (see Patent Document 1). This closes the space above the conveying path at the opening by inserting a shutter between two adjacent bars of the bar conveyor. In other words, the shutter device of Patent Document 1 is dedicated to bar conveyors.

[0005] However, as described above, the conveyor used in a poultry farming facility in which the conveying path passes through an opening in a wall is not limited to a bar conveyor. Therefore, there has been a demand for a conveyor that can prevent foreign objects or small animals from entering through an opening in a wall, regardless of the type of conveyor. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6472542 Summary of the Invention [Problem to be solved by the invention]

[0007] In view of the above-mentioned circumstances, the present invention has an object to provide a conveyor that can prevent foreign objects and small animals from entering through an opening in a wall in a poultry farming facility, regardless of the type of conveyor used so that the transport path passes through the opening, and a method of using the conveyor. [Means for solving the problem]

[0008] In order to solve the above problems, the conveyor for a poultry farm according to the present invention comprises: "A conveyor for conveying an object from a first space to a second space partitioned by a wall in a poultry farm through an opening in the wall, a conveyor frame supporting the conveying components; A plurality of rollers on which a conveyor frame is mounted; A rotatable long screw shaft having a male screw formed on its outer peripheral surface and supported so that its axial direction is parallel to the conveying direction of the conveyor; a nut having a female thread that is screwed into the male thread; a nut fixing portion to which the nut is fixed and which is fixed to the conveyor frame; a tool locking portion for locking a tool that rotates the long screw shaft; Equipped with One end of the long threaded shaft has an unthreaded portion without a male thread, and a recess is formed in the unthreaded portion, and a key is fitted into the recess so as to protrude from the outer circumferential surface of the unthreaded portion. the tool locking portion has a through hole through which the unthreaded portion is inserted, and a slit that opens to an inner circumferential surface of the through hole and penetrates the tool locking portion, a portion of the key protruding from the recess is inserted into the slit, so that when the tool locking portion is rotated, the long threaded shaft rotates integrally therewith; When the long screw shaft is rotated while the roller is free to rotate, the nut, whose rotation is restricted by the nut fixing portion, moves in the axial direction of the long screw shaft, and the force moving the nut is transmitted to the conveyor frame via the nut fixing portion, causing the conveyor frame to move in the forward and backward directions.

[0009] The "conveying direction" is the direction in which the transported object moves, and is synonymous with the "forward direction." The direction opposite to the forward direction is the "rearward direction," and the forward direction and the rearward direction are collectively referred to as the "forward / rearward direction."

[0010] The type of conveyor to which the present invention is applied is not particularly limited, and may be a belt conveyor, a chain conveyor, a roller conveyor, or a screw conveyor. In the case of a belt conveyor, the main components of the conveying path are a pair of pulleys, an endless belt wound around the pair of pulleys, and a drive mechanism for driving the circulation of the endless belt. In the case of a chain conveyor, the main components of the conveying path are two endless chains that are wound around a pair of sprockets and circulate, a conveyed object holder such as a bar, plate, or bucket supported by the two endless chains, and a drive mechanism for driving the circulation of the endless chains.

[0011] In the case of a roller conveyor, the main components of the transport path are free rollers arranged in a row in the transport direction and rotated by the weight of the transported objects, or rollers arranged in a row in the transport direction and rotated by a drive mechanism. In the case of a screw conveyor, the main components of the transport path are a screw that revolves in a spiral shape and extends in the transport direction, and a drive mechanism that drives the rotation of the screw.

[0012] The male thread of the long screw shaft and the female thread of the nut may be screwed together by direct contact, or the male thread and the female thread may be screwed together via a ball. The cross-sectional shape of the "thread" in the male thread and the female thread is not particularly limited, and may be trapezoidal, square, rectangular, or triangular.

[0013] The conveyor of this configuration can move the entire conveyor frame supporting the transport path component in the forward and backward directions by the simple operation of rotating the long screw shaft. That is, the nut whose female thread is screwed into the male thread of the long screw shaft is fixed to the nut fixing part, and the nut fixing part is fixed to the conveyor frame. Therefore, when the long screw shaft is rotated, the nut moves in the axial direction of the long screw shaft without rotating. The axial direction of the long screw shaft is parallel to the transport direction. Therefore, the force that moves the nut is transmitted to the conveyor frame via the nut fixing part, and a force that moves the nut in the forward and backward directions acts on the conveyor frame.

[0014] The conveyor frame supporting the transport path components is extremely heavy, but the conveyor frame is placed on multiple rollers, and because these rollers are freely rotatable, when a force is applied to move the conveyor frame in the forward and backward directions, the force can move the heavy conveyor frame in the forward and backward directions.

[0015] The conveyor of the present invention, which can move the entire conveyor frame in the forward and backward directions, transports objects from the first space to the second space with the transport path passing through an opening provided in the wall dividing the first space and the second space, and can pull the entire conveyor into the first space when the conveyor is not in use. Therefore, regardless of the type of conveyor, the opening in the wall can be completely closed when not in use, and it is possible to reliably prevent foreign objects or small animals from entering from one of the first space and the second space to the other through the opening.

[0016] In addition to the above configuration, the conveyor for a poultry farm according to the present invention has the following features: "Each of the rollers has a uniform diameter portion on which the conveyor frame is placed, and has an expanding diameter portion whose diameter gradually increases outside the uniform diameter portion in the left-right direction perpendicular to the front-rear direction."

[0017] In this configuration, when the conveyor frame is moved in the forward and backward directions, the movement direction of the conveyor frame placed on the roller's uniform diameter portion is prevented from shifting to the left or right due to the presence of the enlarged diameter portion. This prevents the conveyor frame from meandering and allows it to move correctly in the forward and backward directions.

[0018] Next, the method of using the conveyor for a poultry farm according to the present invention is as follows: "A conveyor frame supporting a conveying component; A plurality of rollers on which a conveyor frame is mounted; A rotatable long screw shaft having a male screw formed on its outer peripheral surface and supported so that its axial direction is parallel to the conveying direction of the conveyor; a nut having a female thread that is screwed into the male thread; a nut fixing portion to which the nut is fixed and which is fixed to the conveyor frame; a tool locking portion for locking a tool that rotates the long screw shaft; A conveyor having and One end of the long threaded shaft has an unthreaded portion without a male thread, and a recess is formed in the unthreaded portion, and a key is fitted into the recess so as to protrude from the outer circumferential surface of the unthreaded portion. the tool locking portion has a through hole through which the unthreaded portion is inserted, and a slit that opens to an inner circumferential surface of the through hole and penetrates the tool locking portion, a portion of the key protruding from the recess is inserted into the slit, so that when the tool engaging portion is rotated, the long screw shaft rotates integrally therewith. of, In the poultry farming facility, the device is placed in a first space separated from a second space by a wall, The long screw shaft is rotated in a state in which the roller is freely rotatable, the nut, the rotation of which is restricted by the nut fixing portion, is moved in the axial direction of the long screw shaft, and the force for moving the nut is transmitted to the conveyor frame via the nut fixing portion, thereby moving the conveyor frame in the front-rear direction, When the conveyor is to convey an object, a force for moving the object in a forward direction in the front-rear direction is transmitted to the conveyor frame, and a vicinity of an end of the conveyor is caused to enter the second space through an opening formed through the wall, When the conveyor is not in use, a force for moving the conveyor in a rearward direction in the front-rear direction is transmitted to the conveyor frame to pull the vicinity of the end of the conveyor from the second space into the first space, "Closing said opening."

[0019] This is the use of the conveyor for poultry farming described above. Effect of the Invention

[0020] As described above, according to the present invention, it is possible to provide a conveyor that can prevent foreign objects and small animals from entering through an opening in a wall of a poultry farming facility, regardless of the type of conveyor used so that the transport path passes through an opening in the wall, and a method of using the conveyor. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view of a conveyor according to one embodiment of the present invention. [Diagram 2] FIG. 2(A) is a perspective view of a roller support portion in the conveyor of FIG. 1, and FIG. 2(B) is a plan view thereof. [Diagram 3] 3(A) and 3(B) are diagrams for explaining the movement of the conveyor in FIG. 1 in the forward and backward directions. [Figure 4] FIG. 4 is a cross-sectional view of the conveyor of FIG. 1 taken along line XX. [Diagram 5] FIG. 5(A) is a perspective view of the end of a long threaded shaft provided with a tool locking portion, FIG. 5(B) is an exploded perspective view of the same portion, and FIG. 5(C) is an exploded cross-sectional view of the same portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, a specific embodiment of the present invention, a conveyor 1 for a poultry farm and a method of using the same, will be described with reference to the drawings. Here, a case in which the conveyor 1 is a belt conveyor will be described as an example.

[0023] The conveyor 1 includes a conveyor frame 10, a transport path component supported by the conveyor frame 10, rollers 20 on which the conveyor frame 10 is placed, a roller support portion 30 that supports the rollers 20 so as to be freely rotatable, and a feed device 40 that transmits a force to the conveyor frame 10 to move it in the forward and backward directions.

[0024] The conveyor frame 10 includes two side frames 11 spaced apart in the left-right direction, and a horizontal connecting member 12 that connects these side frames 11. Here, the "left-right direction" refers to a horizontal direction perpendicular to the front-rear direction.

[0025] Each side frame 11 includes a long upper bar 11a and a long lower bar 11b extending in the conveying direction, and a plurality of vertical connecting members 11c connecting the upper bar 11a and the lower bar 11b. The horizontal connecting members 12 connect the lower bar 11b of the left side frame 11 to the lower bar 11b of the right side frame 11 at a plurality of points.

[0026] The conveyor frame 10 supports the conveying path component between the left and right side frames 11 above the horizontal connecting member 12. In this embodiment, the conveying path component mainly includes a pair of pulleys, an endless belt wound around the pair of pulleys, and a drive mechanism for driving the circulation of the endless belt (all of which are omitted in the figure). One of the pair of pulleys is rotatably supported by the conveyor frame 10 near the front end, and the other pulley is rotatably supported by the conveyor frame 10 near the rear end. In addition, the conveyor 1 includes, as the conveying path component, a carrier roller 68 that supports the upper belt that conveys the conveyed object in the circulating endless belt, and a return roller 69 that supports the lower (return side) belt. Both the carrier roller 68 and the return roller 69 are rotatably supported between the left and right side frames 11 via the vertical connecting member 11c. In FIG. 1, in order to clearly show the rollers 20, some of the return rollers 69 are omitted from the figure.

[0027] The rollers 20 are used as free rollers, and each conveyor 1 is provided with multiple pairs of rollers 20, one on the left and one on the right. Each roller 20 in this embodiment has a uniform diameter portion 21 with a uniform diameter, and an expanded diameter portion 22 connected to the uniform diameter portion 21 and with a gradually increasing diameter.

[0028] The roller support parts 30 are parts that support pairs of rollers 20 on the left and right, and each conveyor 1 has the same number of roller support parts 30 as there are pairs of rollers 20. Each roller support part 30 has a base part 31 and a roller fixing part 32. There are two base parts 31, which are elongated rod-shaped members, each extending in the left-right direction and placed on the installation surface 91 so that the two are spaced apart in the conveying direction. The distance separating the two base parts 31 is set to be slightly larger than the diameter of the expanded diameter part 22 of the roller 20.

[0029] Each roller support part 30 has two roller fixing parts 32 corresponding to the number of rollers 20. Each roller fixing part 32 has a bridge part 32a that spans two base parts 31 that are spaced apart, and a rotating shaft support part 32b that extends into the space between the two base parts 31. The bridge part 32a is a flat plate with a rectangular hole part 32h penetrating therethrough, and both ends of the bridge part 32a are fixed to the base part 31 while being placed on the upper surface of the base part 31. In the bridge part 32a, flat rotating shaft support parts 32b extend downward from a pair of sides parallel to the conveying direction among the periphery of the hole part 32h. The roller 20 is disposed between these two rotating shaft support parts 32b, and both ends of the rotating shaft 20p of the roller 20 are rotatably attached to the rotating shaft support parts 32b so that the direction of the rotating shaft 20p of the roller 20 is the left-right direction.

[0030] In addition, roller 20 is attached to rotating shaft support portion 32b at a height such that there is a gap h between its lower end and the supporting surface, and the upper portions of constant diameter portion 21 and enlarged diameter portion 22 are exposed above hole portion 32h (see Figure 4).

[0031] Of the portion of the roller 20 exposed above the hole 32h, the lower bar 11b of the conveyor frame 10 is placed on the same diameter portion 21. Therefore, the fixed positions of the left and right rollers 20 in one roller support part 30 relative to the base part 31 by the roller fixing part 32 are adjusted so that they are separated by the distance between the left and right side frames 11. In addition, the left and right rollers 20 are fixed in such a manner that the same diameter portion 21 faces inward in the left-right direction and the enlarged diameter portion 22 faces outward.

[0032] The feed device 40 includes a long screw shaft 41, a nut 42, a nut fixing portion 43, a tool locking portion 45, and a screw base portion 47. The screw base portion 47 supports the long screw shaft 41 so that its height from the installation surface 91 is higher than the upper end of the roller 20. In this embodiment, the screw base portion 47 is supported on the installation surface 91 via one of the roller support portions 30. Specifically, the screw base portion 47 has a flat bottom surface portion 47a and a pair of support pieces 47b standing upward from both ends of the bottom surface portion 47a. The bottom surface portion 47a is bridged across the two base portions 31 at a position that does not interfere with the portion of the roller 20 exposed upward from the hole portion 32h.

[0033] The long threaded shaft 41 has a male thread 41a formed on the outer circumferential surface of the shaft, and both ends of the shaft are fixed to the support pieces 47b via bearings 47c, so that the shaft direction is parallel to the conveying direction and the long threaded shaft 41 is rotatably supported between the pair of support pieces 47b. One end of the long threaded shaft 41 extends outward beyond the bearing 47c, and a tool locking portion 45 is provided there.

[0034] The tool locking portion 45 is a polygonal columnar portion that locks a tool for rotating the long screw shaft 41. Here, the case where the tool locking portion 45 is a hexagonal columnar portion is illustrated. As a configuration for rotating the tool locking portion integrally with the long screw shaft, it is conceivable to provide a female thread in the tool locking portion, fasten the female thread to the male thread of the long screw shaft, and then fix the tool locking portion to the long screw shaft. However, in that case, by repeatedly applying torque to the tool locking portion to rotate the long screw shaft, the male thread of the long screw shaft and the female thread of the tool locking portion may be crushed, and it may become impossible to remove the tool locking portion from the long screw shaft. It is desirable that the tool locking portion be replaceable in order to maintain a good engagement state with the tool.

[0035] Therefore, in this embodiment, the following configuration is adopted to rotate the tool locking portion 45 integrally with the long threaded shaft 41. That is, the end of the long threaded shaft 41 on the side where the tool locking portion 45 is attached is an unthreaded portion 41b without a male thread, and a recess 41r is formed in this portion. The key 44 is fitted into the recess 41r so as to protrude from the outer circumferential surface of the unthreaded portion 41b. Meanwhile, the tool locking portion 45 has a through hole 45h for inserting the unthreaded portion 41b, and a slit 45s parallel to the through hole 45h. The slit 45s penetrates the tool locking portion 45 while opening on the inner circumferential surface of the through hole 45h. The width of the slit 45s is slightly larger than the width of the key 44, and the depth of the slit 45s is set to be slightly larger than the height at which the key 44 protrudes from the outer circumferential surface of the unthreaded portion 41b. With this configuration, when the unthreaded portion 41b is inserted into the through-hole 45h with the key 44 fitted into the recess 41r, the protruding portion of the key 44 is inserted into the slit 45s. In other words, a part of the key 44 is fitted into the recess 41r of the long threaded portion 41, and the remaining part is inserted into the slit 45s of the tool locking portion 45. As a result, when the tool locking portion 45 is rotated with a tool, the long threaded shaft 41 rotates integrally therewith.

[0036] The tool locking portion 45 has a female threaded hole 45f that is perpendicular to the axial direction, has one end that opens to the outer circumferential surface, and the other end that communicates with a through hole 45h. A set screw 46 is inserted into this female threaded hole 45f, and the tip of the set screw 46 presses the non-threaded portion 41b inserted into the through hole 45h, thereby preventing rattling between the long threaded portion 41 and the tool locking portion 45 that are integrated via the key 44. Note that, although the set screw 46 shown here has a hexagonal hole 46e at the end and is advanced and retreated with a hexagonal wrench, a set screw with a slot can also be used.

[0037] The female thread of the nut 42 is adapted to be screwed onto the male thread 41a of the long threaded shaft 41. The nut 42 is screwed onto the long threaded shaft 41 between the pair of support pieces 47b. The nut 42 also has a flange portion 42f at one end.

[0038] The nut fixing portion 43 is flat, and the long screw shaft 41 passes through between one of the support pieces 47b and the nut 42. The nut 42 is fixed to the nut fixing portion 43 with the flange portion 42f overlapping the nut fixing portion 43. An end portion of the nut fixing portion 43 is fixed to one of the vertical connecting portions 11c of the side frame 11. In other words, the nut 42 is fixed to the nut fixing portion 43, and the nut fixing portion 43 is fixed to the conveyor frame 10.

[0039] The conveyor 1 having the above-described configuration can be used in a very novel manner in which the conveyor frame 10, which is an extremely heavy configuration supporting the transport path constituent members, is slid as a whole relative to the installation surface 91.

[0040] Specifically, when the tool locking portion 45 is rotated using a tool such as a wrench, the long threaded shaft 41 rotates integrally with the tool locking portion 45. The female thread of the nut 42 is screwed into the male thread 41a of the long threaded shaft 41, but since the nut 42 is fixed to the nut fixing portion 43, which is fixed to the conveyor frame 10, the nut 42 does not rotate but moves in the axial direction of the long threaded shaft 41 as the long threaded shaft 41 rotates. At that time, the force that moves the nut 42 in the axial direction is transmitted to the conveyor frame 10 via the nut fixing portion 43.

[0041] The conveyor frame 10 is placed on a plurality of rollers 20, and the rollers 20 are supported rotatably at a height with a gap h between them and the installation surface 91. The direction of the rotation axis 20p of the rollers 20 is the left-right direction. In other words, the relative rolling direction of the rollers 20 with respect to the conveyor frame 10 is the front-rear direction. Therefore, the force transmitted from the nut 42 to the conveyor frame 10 via the nut fixing part 43 causes the conveyor frame 10 to move in the front-rear direction while rotating the rollers 20. When the long screw shaft 41 is rotated forward, the conveyor frame 10 moves forward, and when the long screw shaft 41 is rotated backward, the conveyor frame 10 moves backward.

[0042] Therefore, when the first space S1 and the second space S2 are partitioned by a wall 92, and an object is conveyed by the conveyor 1 from the first space S1 to the second space S2 through an opening 92h provided through the wall 92, the conveyor frame 10 of the conveyor 1 disposed in the first space S1 can be moved forward to pass the vicinity of the front end of the conveyor 1 through the opening 92h and enter the second space S2, as shown in Fig. 3(A). This allows the object conveyed in the first space S1 by the conveyor 1 to be transferred to another conveyor in the adjacent second space S2 and further conveyed, or the object conveyed in the first space S1 by the conveyor 1 to be discharged from the conveyor 1 in the adjacent second space S2 and introduced into a collection container.

[0043] On the other hand, when the conveyor 1 is not in use, the conveyor frame 10 is moved backward to pull the entire conveyor 1 into the first space S1 as shown in Fig. 3(B). The opening 92h can be completely closed by the door 93. This makes it possible to prevent foreign objects or small animals from entering from one of the first space S1 and the second space S2 to the other through the opening 92h.

[0044] In particular, when the first space S1 is an internal space of a building and the second space S2 is an external space, if the opening 92h were left open even when the conveyor 1 was not in use, there would be a high risk of foreign objects or small animals entering the internal space from the external space through the opening 92h, and the problems that would arise as a result would be serious. Therefore, there is a great advantage in being able to keep the opening 92h closed when the conveyor 1 is not in use.

[0045] As described above, according to the conveyor 1 of this embodiment, by the simple operation of rotating the long screw shaft 41, the entire conveyor frame 10 supporting the transport path constituent members can be moved in the front-rear direction.

[0046] In addition, since the conveyor frame 10 is placed on a plurality of rotatable rollers 20, resistance is small when a force is applied to move the conveyor frame 10 in the forward and backward directions. Therefore, even if the torque to rotate the long screw shaft 41 is small due to a manual tool, it is possible to move the conveyor frame 10, which is an extremely heavy structure that supports the transport path component members.

[0047] In addition, the conveyor frame 10 is placed on the same diameter portion 21 of each of the rollers 20, and the rollers 20 have enlarged diameter portions 22 whose diameter gradually increases outside the same diameter portions 21 in the left-right direction. Therefore, when the conveyor frame 10 is moved in the front-rear direction, the presence of the enlarged diameter portions 22 prevents the moving direction from shifting left and right. This prevents the conveyor frame 10 from meandering and allows it to move correctly in the front-rear direction.

[0048] The present invention has been described above with reference to 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 spirit of the present invention.

[0049] For example, in the above embodiment, the screw fixing part 47 that rotatably supports the long screw shaft 41 is supported on the installation surface 91 via one of the roller supports 30. However, the present invention is not limited to this, and the screw fixing part may be directly supported on the installation surface.

[0050] Furthermore, when the conveyor frame 10 is moved in the forward / backward direction, the rollers 20 on which the conveyor frame 10 is placed must be freely rotatable. However, when the conveyor frame 10 is not moved in the forward / backward direction, i.e., when the conveyor 1 is transporting an object, the rotation of the rollers 20 may be restricted by a stopper.

Claims

1. A conveyor for conveying an object from a first space to a second space partitioned by a wall in a poultry farm through an opening provided in the wall, a conveyor frame supporting the conveying components; A plurality of rollers on which a conveyor frame is mounted; A rotatable long screw shaft having a male screw formed on its outer peripheral surface and supported so that its axial direction is parallel to the conveying direction of the conveyor; a nut having a female thread that is screwed into the male thread; a nut fixing portion to which the nut is fixed and which is fixed to the conveyor frame; and a tool locking portion for locking a tool that rotates the long screw shaft. One end of the long threaded shaft has an unthreaded portion without a male thread, and a recess is formed in the unthreaded portion, and a key is fitted into the recess so as to protrude from the outer circumferential surface of the unthreaded portion. the tool locking portion has a through hole through which the unthreaded portion is inserted, and a slit that opens to an inner circumferential surface of the through hole and penetrates the tool locking portion, a portion of the key protruding from the recess is inserted into the slit, so that when the tool locking portion is rotated, the long threaded shaft rotates integrally therewith; When the long screw shaft is rotated in a state in which the roller is freely rotatable, the nut, whose rotation is restricted by the nut fixing portion, moves in the axial direction of the long screw shaft, and the force moving the nut is transmitted to the conveyor frame via the nut fixing portion, causing the conveyor frame to move in the front-rear direction. A conveyor for a poultry farming facility.

2. The plurality of rollers each have a uniform diameter portion on which the conveyor frame is placed, and each roller has an expanding diameter portion whose diameter gradually increases outward from the uniform diameter portion in a left-right direction perpendicular to the front-rear direction.

2. A conveyor for a poultry farm according to claim 1.

3. a conveyor frame supporting the conveying components; A plurality of rollers on which a conveyor frame is mounted; A rotatable long screw shaft having a male screw formed on its outer peripheral surface and supported so that its axial direction is parallel to the conveying direction of the conveyor; a nut having a female thread that is screwed into the male thread; a nut fixing portion to which the nut is fixed and which is fixed to the conveyor frame; a tool locking portion for locking a tool that rotates the long screw shaft, One end of the long threaded shaft has an unthreaded portion without a male thread, and a recess is formed in the unthreaded portion, and a key is fitted into the recess so as to protrude from the outer circumferential surface of the unthreaded portion. the tool locking portion has a through hole through which the unthreaded portion is inserted, and a slit that opens to an inner circumferential surface of the through hole and penetrates the tool locking portion, A conveyor characterized in that a portion of the key protruding from the recess is inserted into the slit, so that when the tool engaging portion is rotated, the long screw shaft rotates integrally therewith. In the poultry farming facility, the device is placed in a first space separated from a second space by a wall, The long screw shaft is rotated in a state in which the roller is freely rotatable, the nut, the rotation of which is restricted by the nut fixing portion, is moved in the axial direction of the long screw shaft, and the force for moving the nut is transmitted to the conveyor frame via the nut fixing portion, thereby moving the conveyor frame in the front-rear direction, When the conveyor is to convey an object, a force for moving the object in a forward direction in the front-rear direction is transmitted to the conveyor frame, and a vicinity of an end of the conveyor is caused to enter the second space through an opening formed through the wall, When the conveyor is not in use, a force for moving the conveyor in a rearward direction in the front-rear direction is transmitted to the conveyor frame to pull the vicinity of the end of the conveyor from the second space into the first space; Closing the opening A method for using a conveyor for a poultry farm.

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