Feed tank lid opening-closing device

Abstract

To provide a lid opening-closing device that can improve workability for workers to supply feed.SOLUTION: A lid opening-closing device 1 according to the present invention is a lid opening and closing device for a feed tank, which is equipped with a hinged lid 6 that opens and closes between an open lid position in a supine position and a closed lid position in a supine position and is provided with an opening position 8b located at the top of the feed tank, and with the hinged lid 6 suspended by a rope-like member extending from a hanging arm, the hinged lid 6 is opened from the closed lid position that closes the opening position 8b to an open lid position that is at the same height as the opening position or at a lower height than the opening position.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lid opening and closing device for a feed tank, and more particularly to a lid opening and closing device provided on a feed tank. [Background technology]

[0002] Patent Documents 1 and 2 disclose a lid opening / closing device used for a feed tank, which discloses that an operator can open and close the lid of a feed-introducing opening provided at the top of the feed tank without climbing to the top of the feed tank. Also, in a conventional facility for raising livestock such as a ranch, when the lid of the top opening of the feed tank is open, a supply section (boom) of a feed supply vehicle, so-called a bulk vehicle, extends to above the feed-introducing opening, and feed is supplied from the feed supply vehicle into the feed tank. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication No. 63-171392 [Patent Document 2] Publication No. 3237694 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the lid of the feed inlet opening in Patent Document 1 and Patent Document 2 is configured to open perpendicularly to the feed inlet opening. Therefore, when refilling the feed tank with contents, there is a risk that the boom of the bulk vehicle will interfere with the lid, limiting the approach method and position of the boom to the feed inlet opening, resulting in a problem of reduced work efficiency. In addition, if the interference causes damage to the lid of the feed inlet opening or damage to the boom of the bulk vehicle, there is a concern that debris caused by the damage will get into the feed tank, causing quality problems such as the quality of the contents, such as feed, not being maintained. The inventors of the present invention therefore conducted extensive research to determine whether it would be possible to avoid interference between the boom of the bulk vehicle and the lid when refilling the tank contents, and thereby to avoid damage to the lid of the feed insertion opening or damage to the bulk vehicle boom, by opening the lid of the feed insertion opening so that it is approximately horizontal with the opening, or to a height lower than the opening.

[0005] Therefore, the present invention has been made to solve the problems required in the prior art described above, and aims to provide a lid opening and closing device for a feed tank that can open a hinged lid to an open lid position in a supine position where it is less likely to interfere with the boom, which is the supply part of a feed supply vehicle that supplies feed to the opening at the top of the feed tank. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one embodiment of the present invention is a lid opening and closing device for a feed tank, in which a hinged lid that opens and closes between an open lid position in a supine position and a closed lid position in a supine position is attached to the feed tank with a feed input opening located at the top of the feed tank, and is characterized in that, when the hinged lid is suspended by a cord-like member extending from a hanging arm, the hinged lid opens from the closed lid position in the supine position that closes the feed input opening to the open lid position in the supine position that is at the same height as the feed input opening or at a lower height than the feed input opening. According to one embodiment of the present invention configured as described above, the hinged lid is hung by the rope-like member extending from the support with the hanging arm, and is opened from the closed position that closes the feed input opening to the supine open position that is at the same height as the feed input opening or lower than the feed input opening. Therefore, an operator can open the hinged lid to the supine open position that is less likely to interfere with the feed arm, i.e., the boom, of a feed supply vehicle that supplies feed to the feed input opening at the top of the feed tank. This improves the operability of the feed supply operation by the operator.

[0007] In order to solve the above-mentioned problems, one embodiment of the present invention is characterized in that the lid opening and closing device for the feed tank is at least composed of a support with a hanging arm having a columnar member provided on the side of the feed tank and a hanging arm extending laterally from the upper part of the columnar member, and a rope-like member extending from the lower part of the feed tank to the hinged lid via the hanging arm, the support with the hanging arm protruding upward above the feed inlet opening position at the top of the feed tank and being rotatable around a central axis extending in the vertical direction of the support with the hanging arm, and when the hinged lid is suspended by the rope-like member extending from the hanging arm, the hinged lid is opened from a closed lid position in the supine state that closes the feed inlet opening position to an open lid position in the supine state that is at the same height as the feed inlet opening position or at a lower height than the feed inlet opening position. According to one embodiment of the present invention configured as described above, the hinged lid is opened from a closed position that closes the feed input opening to an open position in the supine state that is at the same height as the feed input opening or a position lower than the feed input opening while the hinged lid is suspended by the rope-like member extending from the support with the hanging arm. This allows an operator to operate the rope-like member from below the feed tank and open the hinged lid from a closed position that closes the feed input opening to an open position in the supine state that is at the same height as the feed input opening or a position lower than the feed input opening while the hinged lid is suspended by the rope-like member extending from the support with the hanging arm. Therefore, by operating the hinged lid from below the feed tank, the worker can open the lid to the supine open position where it is unlikely to interfere with the feed supply arm, i.e., the boom, of the feed supply vehicle that supplies feed to the feed input opening at the top of the feed tank, thereby improving the operability of the feed supply work by the worker.

[0008] In one embodiment of the present invention, it is preferable that the device further includes a support section that supports the pillar with the hanging arm so that it can be moved in the vertical direction, and the support section is formed so that the pillar with the hanging arm can be positioned at the upper position where the upper end of the pillar with the hanging arm is above the top of the feed tank, and at the lower position where the upper end of the pillar with the hanging arm is below the top of the feed tank. According to one embodiment of the present invention configured as described above, the support with the hanging arm is supported by the support part so as to be movable in the vertical direction, and the support with the hanging arm can be positioned at an upper position where the upper end of the support with the hanging arm is above the top of the feed tank, and at a lower position where the upper end of the support with the hanging arm is below the top of the feed tank. This allows the hinged lid to be hung from above the hinged lid when opening and closing it, and when feeding feed to the feed input opening at the top of the feed tank, the support with the hanging arm can be positioned at a lower position below the top, making it less likely that the support with the hanging arm will interfere with the feed arm of the feed feeding vehicle. This can further improve the operability of the feed feeding work by the operator.

[0009] In one embodiment of the present invention, it is preferable that the device further comprises a weight side rope-like member extending from the rope-like member mounting portion of the support with the hanging arm, a pulley for the weight side rope-like member that is provided above the rope-like member mounting portion and on which the weight side rope-like member is hung, and a weight portion to which the weight side rope-like member is attached. According to one embodiment of the present invention configured as described above, the support further includes a weight-side rope-like member extending from the rope-like member attachment portion of the support with hanging arms, and a weight portion to which the weight-side rope-like member is attached. With this, when the support with hanging arms moves downward, the weight portion applies an upward force to the support with hanging arms, and when the support with hanging arms moves upward, the weight portion applies an upward force to the support with hanging arms to assist the support with hanging arms. Therefore, when the support with hanging arms moves downward, the risk of the support with hanging arms falling and injuring the feet of the worker can be reduced, and when the support with hanging arms moves upward, the force with which the worker lifts the support with hanging arms can be reduced, thereby reducing the workload of the worker. Therefore, the operability of the worker in raising and lowering the support with hanging arms can be improved.

[0010] In one embodiment of the present invention, the weight of the support with the hanging arm is preferably greater than the weight of the weight portion, and the weight of the weight portion is preferably greater than 70% of the weight of the support with the hanging arm. According to one embodiment of the present invention configured as described above, the weight of the hanging arm support is heavier than the weight of the weight portion, and the weight of the weight portion is heavier than 70% of the weight of the hanging arm support, which can reduce the risk of the hanging arm support falling and injuring the worker's feet when the hanging arm support moves downward, and can reduce the force that the worker needs to lift the hanging arm support when the hanging arm support moves upward, thereby reducing the worker's workload. In addition, according to the feed tank with lid opening and closing device of one embodiment of the present invention, the support column constituting the support part of the lid opening and closing device is fixed and supported by the support leg attached to the side of the lower part of the tank body of the feed tank. This allows the lid opening and closing device to be stably attached to the feed tank, so that the operator can perform a reliable and safe feed supplying operation. Effect of the Invention

[0011] According to the present invention, the workability of the feed supplying work by the worker can be improved. [Brief description of the drawings]

[0012] [Figure 1] 1 is a perspective view of a lid opening and closing system provided with a lid opening and closing device for a feed tank according to one embodiment of the present invention. FIG. [Diagram 2] FIG. 2 is a top view of a lid opening and closing system provided with a lid opening and closing device for a feed tank according to one embodiment of the present invention. [Diagram 3] 3 is a partially enlarged perspective view showing the vicinity of a winch and a stopper portion indicated by III in FIG. 1; FIG. [Figure 4] 1 is a side view of a lid opening and closing system provided with a lid opening and closing device for a feed tank according to one embodiment of the present invention. FIG. [Diagram 5] 1 is a side view showing a state in which the lid is being opened by the feed tank lid opening and closing device according to one embodiment of the present invention. FIG. [Figure 6] 1 is a side view showing a state in which the lid is opened to an open lid position by the feed tank lid opening and closing device according to one embodiment of the present invention. FIG. [Figure 7] 1 is a top view showing a state in which the lid is opened to the open lid position by the feed tank lid opening and closing device according to one embodiment of the present invention. FIG. [Figure 8] A figure showing the state in which the lid has been opened to the open position by the feed tank lid opening and closing device according to one embodiment of the present invention, and the state in which the columnar member and the hanging arm have been lowered to the lowered position. [Figure 9] 9 is a diagram showing how feed is supplied to a feed tank from a feed supply vehicle using a supply arm when the columnar member and the hanging arm in FIG. 8 are lowered to their lowered positions. FIG. [Figure 10] 1 is a diagram showing a state in which the lid has been opened to the open position by the feed tank lid opening / closing device according to one embodiment of the present invention, and the columnar member and the hanging arm have been raised to the raised position. FIG. [Figure 11] 1 is a side view showing a state in which the lid is being closed by the feed tank lid opening and closing device according to one embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Next, a lid opening / closing system provided with a lid opening / closing device according to one embodiment of the present invention will be described with reference to the accompanying drawings. The disclosed embodiments have been described by way of example only, and it will be apparent to those skilled in the art that many variations, modifications and substitutions may be made within the spirit and scope of the invention. Therefore, the present invention is not limited to the disclosed embodiment, and various modifications and changes can be made in the form and details without departing from the scope of the claims. Fig. 1 is a perspective view of a lid opening / closing system provided with a feed tank lid opening / closing device according to one embodiment of the present invention. Fig. 2 is a top view of the lid opening / closing system provided with a feed tank lid opening / closing device according to one embodiment of the present invention. Fig. 3 is a partially enlarged perspective view showing an enlarged view of the vicinity of the winch and stopper portion indicated by III in Fig. 1. Fig. 4 is a side view of the lid opening / closing system provided with a feed tank lid opening / closing device according to one embodiment of the present invention. In Fig. 4, the lid opening direction is indicated by arrow D1, and the lid closing direction is indicated by arrow D2.

[0014] As shown in FIG. 1, in one embodiment of the present invention, a lid opening and closing device 1 for a feed tank is provided in a lid opening and closing system 2. The lid opening and closing system 2 includes a feed tank 4 and a lid opening and closing device 1 provided in the feed tank 4.

[0015] The feed tank 4 is a large tank that is large enough that a worker can use a ladder to climb up to the lid from the ground in order to open or close the lid 6 of the feed tank 4. The feed tank 4 is a tank for storing livestock feed, for example, granular compound feed. As shown in Fig. 4, the feed tank 4 is formed so that the height H from the ground G to the top lid 6 (the lid in the closed position) is 3 to 10 m, for example 3 to 7 m. Such a large feed tank 4 is mainly placed outdoors.

[0016] As shown in FIG. 1, the feed tank 4 comprises a hollow tank body 8, a lid 6 provided at an opening portion 8b (see FIG. 5) of the top 8a of the tank body 8, and support legs 10 that support the tank body 8. Although a ladder for the feed tank 4 is not shown in the figure, it may be pre-installed in the feed tank 4, or an optional ladder may be prepared and used when necessary.

[0017] The tank body 8 is formed in a cylindrical shape so as to be capable of storing feed therein. The tank body 8 is made of resin such as fiber reinforced plastic (FRP). The top 8a of the tank body 8 is formed in a conical shape, and a circular opening portion 8b (see FIG. 5) is formed in the center of the top 8a. The opening portion 8b of the tank body 8 can be an opening portion for feeding feed (opening portion for feeding feed). The tank body 8 is formed at its bottom with a discharge port portion 8c for discharging feed.

[0018] The lid 6 is formed so as to cover an opening portion 8b of a top portion 8a of the tank body 8. The lid 6 is formed as a hinged lid that opens and closes between an open lid position in the supine position (see FIG. 6) and a closed lid position in the supine position (see FIG. 4). The lid 6 functions, for example, as a feed introduction opening lid that covers an opening for introducing feed. In relation to the opening portion 8b, the lid 6 is opened from a closed position where the opening portion 8b is closed to an open position where the opening portion 8b is opened. The lid 6 is formed in a roughly circular shape, and is formed to be slightly larger than the circular opening portion 8b (see FIG. 4). The lid 6 is formed in a dome shape, and is formed so that the height of the center portion is higher than the height of the edge portion (see FIG. 4). The lid 6 is formed of a metal such as iron. The lid 6 has a weight within a range of approximately 3 kg to 7 kg, for example, 4.5 kg.

[0019] The lid 6 is a hinged lid formed to be rotatable around a hinge portion 12. The hinge portion 12 of the lid 6 has a hinge structure. The lid 6 is formed to be rotatable around the direction in which the hinge portion 12 extends, i.e., the direction in which the rotation center axis A of the hinge portion 12 extends (the rotation center axis A is shown by a dashed line in Figs. 1, 2, and 5). The rotation center axis A of the hinge portion 12 extends generally horizontally, and extends toward the side of the tank body 8. When viewed from above, the hinge portion 12 is positioned at a position offset from the center C of the tank body 8 (center C is shown imaginarily in Figure 2) and is positioned outside and near the opening position 8b.

[0020] The support legs 10 are attached to the sides of the lower part of the tank body 8. The support legs 10 are formed of rod-shaped members extending from the ground G to the sides of the tank body 8. The support legs 10 are installed on the ground, and are configured so that the three support legs support the weight of the tank body 8. The number and shape of the support legs 10 may be changed.

[0021] The feed tank lid opening / closing device 1 is a device for opening and closing a hinged lid 6. The feed tank lid opening / closing device 1 is provided on the side of the feed tank 4 and comprises a pillar 14 with a hanging arm, a support part 16 which is a support member supporting the pillar 14 with the hanging arm, a first rope 18 which is a cord-like member, and a winch 20 which winds up the first rope 18.

[0022] The suspension arm support 14 forms an overhead pole for guiding the first rope 18 . Therefore, the suspension arm-equipped support 14 functions as a guide pole that guides the first rope 18. At the upper position, the suspension arm-equipped support 14 extends like a crane from the side of the tank body 8 to the upper center of the tank body 8 (above the opening portion 8b).

[0023] The suspension arm support 14 is disposed on the side of the tank body 8 of the feed tank 4, and is vertically installed so as to intersect with an extension line of the rotation center axis A of the hinge part 12 of the lid 6. In other words, the suspension arm support 14 is vertically installed on the side of the tank body 8 of the feed tank 4 and rearward of the hinge part 12 of the lid 6, that is, at a rear position away from the opening part 8b of the lid 6. The support pole 14 with hanging arms includes a columnar member 22 extending vertically together with a hanging arm 24 extending laterally from the upper portion of the columnar member 22 toward the side. The columnar member 22 is a straight rod-like member that extends in the vertical direction. The suspension arm-equipped support 14 is also provided so as to be rotatable about a central axis B (see FIG. 4) extending in the vertical direction. The central axis B is the central axis in the longitudinal direction of the columnar member 22. The central axis B is indicated by a dashed line in FIGS. 4 and 5.

[0024] As will be described later, the columnar member 22 of the suspension arm-attached support 14 is capable of moving up and down within the guide portion 32a. Therefore, the suspension arm-attached support 14 is configured to be movable in the vertical direction. The columnar member 22 has a length corresponding to the height from the ground G (see FIG. 4) to the opening portion 8b of the tank body 8. For example, the length of the columnar member 22 is within a range of 3 m to 7 m. 4, the columnar member 22 is formed so that, in the raised position, its upper end 22a is located above the lid and its lower end 22b is located below about 1.5 m. For example, the columnar member 22 is located in the raised position when the lid 6 is suspended, etc. 8, the pillar-shaped member 22 is formed so that, in the lowered position, its upper end 22a is positioned at the same level as or lower than the lid 6, and its lower end 22b is positioned on the ground G. As shown in FIG. 9, for example, the pillar members 22 are in the lowered position when feed is introduced into the opening portion 8b. In this manner, the columnar member 22 is formed to have a length that is approximately the same as the distance from the lid 6 of the feed tank 4 to the ground G or shorter than that distance. The columnar member 22 and the hanging arm 24 are made of stainless steel. The weight of the column with hanging arm 14 is within a range of 5 kg to 12 kg, for example 5 kg.

[0025] As described below, the columnar member 22 of the column with a hanging arm 14 can rotate within the guide portion 32a. The columnar member 22 of the column with a hanging arm 14 is placed rotatably on the plane of the stopper 38. In this manner, the columnar member 22 is not fixed in the rotation direction around the central axis B. Therefore, the suspension arm support 14 is rotatable about a central axis B (see Figure 4) extending in the vertical direction of the suspension arm support 14 when it receives a force from a manual rotation operation or the force of the first rope 18. Therefore, as the winch 20 winds up or lets out the first rope 18, which is a cord-like member, the hanging arm 24 is rotated, and the position of the hanging arm 24 with respect to the lid 6 is moved relatively. The support 14 with the hanging arm is configured so that its orientation can be changed, for example, so that when the lid 6 is in the closed position, the hanging arm 24 faces toward the closed position, and when the lid 6 is in the open position, the hanging arm 24 faces toward the open position.

[0026] 3, the columnar member 22 of the suspension arm-attached support 14 is disposed on a stopper portion 34, which will be described later. A lower lever 22c, which is an operating lever, is formed on the lower end of the columnar member 22. The lower lever 22c extends laterally from the lower end 22b of the columnar member 22. The lower lever 22c is formed as an operating part with which an operator operates the support pole 14 with a hanging arm, and enables the operator to easily raise and lower the lower lever 22c and the support pole 14 with a hanging arm while holding the lower lever 22c.

[0027] 1, the columnar member 22 is further provided with a middle lever 22d, which is an additional operating lever, at a position between 1 m and 1.5 mm above the lower end 22b. Since the columnar member 22 is provided with the middle lever 22d, even when the columnar member 22 is in the lowered position, the worker can easily lift the columnar member 22 by gripping the middle lever 22d without bending down to the ground.

[0028] The hanging arm 24 extends from the upper end of the columnar member 22 toward the inside of the tank body 8. The hanging arm 24 forms a beam member 24a that extends generally horizontally. Furthermore, the hanging arm 24 includes an inclined portion 24b that connects the middle portion of the beam member 24a and the columnar member 22 at an angle. The structure of the hanging arm 24 may be other structure, for example, formed only by the beam member 24a, or may be, for example, a combination of the beam member 24a and other reinforcing structures.

[0029] As shown in Figure 1, the support portion 16 includes a support pillar 30 extending vertically from the ground G (see Figure 4) to near the shoulder portion 8d of the tank body 8, a support pillar guide portion 32 extending horizontally from the support pillar 30, and a stopper portion 34 extending horizontally from the support pillar 30.

[0030] The support column 30 forms a fixed column extending from the ground G so as to support the suspension arm-equipped column 14. The support column 30 is formed, for example, of a pole such as a circular tube. The support column 30 forms a column with a larger diameter than the columnar member 22 in order to support the suspension arm-equipped column 14 and the like. The support column 30 is made of, for example, a metal such as iron, etc. The support column 30 is connected and fixed to the support leg 10 by a connector 33 (see Figs. 1 and 3). Therefore, the support pole 30 is not only placed on the ground G, but also supported by the support leg 10 and stably fixed.

[0031] 3, the support pole guide part 32 is a connecting member having both ends formed in an annular shape and a middle part formed in a flat plate shape. The proximal end of the support pole guide part 32 is fixed to the support pole 30. The distal end of the support pole guide part 32 forms a ring-shaped guide part 32a. Therefore, with the columnar member 22 of the column with hanging arms 14 supported within the guide portion 32a, the columnar member 22 can move up and down between an upper position and a lower position. Also, the columnar member 22 can rotate within the guide portion 32a. Therefore, the column with hanging arms 14 is provided rotatable about the central axis B. As shown in FIG. 1, the support pole guide parts 32 are provided in three places, but the number and positions of the support pole guide parts 32 can be changed arbitrarily.

[0032] As shown in FIG. 8, the stopper portion 34 includes a stopper guide 36 that is bifurcated midway, and a stopper 38 that covers the upper side of the stopper guide 36 and is slidable in the longitudinal direction.

[0033] The stopper guide 36 is branched into a fork shape at the middle portion. The two guides of the stopper guide 36 are each formed in a flat plate shape and extend parallel to each other. As shown in FIG. 8, the width between the two guides of the stopper guide 36 is wider than the width of the columnar member 22 . Therefore, the post 22 can move between the two guides with the stopper 38 removed or with the stopper 38 shifted to an extent that allows the post 22 to pass.

[0034] The stopper 38 is formed so that both ends of the flat plate hang down. The stopper 38 is formed so as to cover the upper parts of the two guides of the stopper guide 36. The stopper 38 is slidable in the longitudinal direction along the upper and outer surfaces of the two guides. The stopper 38 is formed so that the width of the stopper 38 is larger than the width of the columnar member 22 when viewed from above. The stopper 38 is formed with a thickness and strength sufficient to support the load of the support column 14 with the hanging arm when the columnar member 22 is placed on its upper surface. Therefore, the stopper 38 forms a support base on the stopper guide 36 that supports the load of the suspension arm-attached column 14 . The stopper 38 is detachable from the stopper guide 36. When the stopper 38 is detached from the stopper guide 36, the columnar member 22 moves downward between the stopper guides 36 and is lowered to the ground.

[0035] The winch 20 is fixed to a support column 30. The winch 20 is a hand-operated winch. The winch 20 is connected to the first rope 18 and transmits the rotational force of the rotating handle 21 to a rotating drum via a built-in gear device, forming a mechanism for winding the first rope 18 around the drum to wind up the first rope 18 or for letting out the first rope 18 from the drum. Therefore, the winch 20 is configured to be capable of rotating in both forward and reverse directions, and forms a letting-out mechanism and a winding mechanism for the first rope 18. The winch 20 has a locking function that prevents the first rope 18 from being automatically unwound by the weight of the lid 6 attached to the end of the first rope 18. Therefore, when the first rope 18 is let out, the first rope 18 is let out while operating a lock function release mechanism (not shown) that releases the lock function of the winch 20.

[0036] The first rope 18 extends from a winch 20 provided at the bottom of the feed tank 4 through a hanging arm 24 at the top of the hanging arm-equipped support 14 to the lid 6. On the side of the tank body 8, the first rope 18 extends vertically from the winch 20 toward a first pulley 40, which will be described later. The first rope 18 has flexibility. The first rope 18 can be changed to a cord-like member such as a string, a cable, a wire, a belt, or a chain.

[0037] 1, a first pulley 40 is provided on the upper part of the support column 30. The first pulley 40 guides the first rope 18 extending vertically from the winch 20. The first pulley 40 includes a first mounting base 40a fixed to the support column 30, and a first pulley 40b rotatably supported on the side of the first mounting base 40a. The first rope 18 is changed in direction along the first pulley 40b above the first pulley 40b toward the inside of the tank body 8. The position and number of the first pulleys 40 can be changed as desired according to the manner in which the first rope 18 is guided. The first rope 18 extends from the first pulley 40 toward the second pulley 42.

[0038] The suspension arm 24 of the suspension-arm support 14 is further provided with a second pulley 42 and a third pulley 44. The second pulley 42 is provided on a portion of the hanging arm 24 on the support pillar side (proximal end side), for example, on the inclined portion 24b. The second pulley 42 includes a second mounting base 42a fixed to the hanging arm 24, and a second pulley 42b rotatably supported below the second mounting base 42a. The second pulley 42 has a second pulley 42b provided below a second mounting base 42a, and the first rope 18 is guided along the upper side of the second pulley 42b. The first rope 18 extends from the second pulley 42 toward the third pulley 44.

[0039] The third pulley 44 is provided on the hanging arm 24 at a portion on the distal end side as viewed from the support column 30. The third pulley 44 includes a third mounting base 44a fixed to the hanging arm 24, and a third pulley 44b rotatably supported on the side of the third mounting base 44a. The third pulley 44 has a third pulley 44b provided below the third mounting base 44a, and the first rope 18 is guided along the upper side of the third pulley 44b. The first rope 18 extends from the third pulley 44 toward the lid 6, folding back downward.

[0040] As shown in FIG. 1, the lid opening / closing device 1 further includes a second rope mounting portion 46 provided on the column-shaped member 22 of the support 14 with a hanging arm, a pulley 48 for a second rope provided above the second rope mounting portion 46, a second rope 50 which is a weight-side cord-like member extending from the second rope mounting portion 46 via the pulley 48 for the second rope, and a weight portion 52 to which the second rope 50 is attached.

[0041] The second rope attachment portion 46 forms a structure for attaching the second rope 50. The second rope attachment portion 46 constitutes a cord-like member attachment portion. The second rope attachment portion 46 is fixed to the columnar member 22, extends laterally from the columnar member 22, and forms a loop portion at the distal end. The second rope 50 is attached to this loop portion.

[0042] The second rope pulley 48 is provided on the support pillar 30 as a pulley for a weight-side cord-like member. The second rope pulley 48 extends in a different direction from the first pulley 40 and the support pillar guide part 32 described above, for example, in a direction that is 90 degrees different from the first pulley 40 and the support pillar guide part 32. The second rope pulley 48 includes a second rope pulley mounting base 48a fixed to the support post 30, and a second rope pulley pulley 48b rotatably supported on the side of the second rope pulley mounting base 48a.

[0043] The second rope 50 extends from the second rope attachment portion 46 , passes through the second rope pulley 48 , and then turns back downward again, and extends to the weight portion 52 . The second rope 50 is a cord-like member. The second rope 50 has flexibility. The second rope can be changed to a cord-like member such as a string, a cable, a wire, a belt, or a chain.

[0044] The weight portion 52 is formed in a cylindrical shape. The weight portion 52 is guided by a weight guide portion 54 extending laterally from the support column 30. The weight portion 52 is movable up and down inside the weight guide portion 54. The weight portion 52 has a predetermined weight, for example, within a range of 3 kg to 10 kg. The weight of the support column 14 with the hanging arm is greater than the weight of the weight portion 52 . The weight of the weight portion 52 is heavier than 70% and lighter than 100% of the weight of the support column 14 with hanging arms.

[0045] Next, the operation of opening and closing the lid 6 by the lid opening and closing device 1 of the lid opening and closing system 2 will be described with reference to Figs.

[0046] First, as shown in FIG. 4, before the start of work, the lid 6 is in the closed position, and the opening portion 8b of the tank body 8 is closed by the lid 6. The support pillar 14 with the hanging arm of the cover opening / closing device 1 is in the raised position, and the pillar-shaped member 22 and the hanging arm 24 are also in the raised position. Therefore, the pillar-shaped member 22 is disposed on the stopper portion 34. The upper end 22a of the pillar-shaped member 22 is located at a height higher than the height of the lid 6. The pillar-shaped member 22 is located on the side of the hinge portion 12. The hanging arm 24 is located above the opening portion 8b. FIG. 4 shows a side view of the hanging arm 24 seen from the side of the hinge part 12. The hanging arm 24 shown in FIG. 4 is located in the initial position. When the first rope 18 is tensioned to such an extent that it does not sag, the tip of the hanging arm 24 extends in the direction in which the first rope 18 extends toward the handle part 6b of the lid 6, as seen from the side of the hinge part 12, toward the handle part side of the lid 6 (closed position side) beyond the hinge part 12. Note that the initial position of the hanging arm 24 is as shown in FIG. 4, but since the hanging arm 24 can rotate around the central axis B as described later, when the tension of the first rope 18 is somewhat weakened, the tip of the hanging arm 24 may be located above the hinge part 12 as shown in FIG. 2.

[0047] The first rope 18 extends upward from the winch 20 via a first pulley 40 (see FIG. 1). The first rope 18 extends from the first pulley 40 via a second pulley 42 to a third pulley 44 of the hanging arm 24. The first rope 18 reaches its highest point at the pulley of the third pulley 44 , turns back downward, and is connected to the handle portion 6 b of the lid 6 . The winch 20 is not being rotated, and the winch 20 is in a state in which the payout of the first rope 18 is locked so that the first rope 18 is not paid out.

[0048] The pillar-shaped member 22 is disposed on the stopper portion 34, and the second rope 50 extends from the second rope attachment portion 46 through the second rope pulley 48 to the weight portion 52. The weight portion 52 is located on the ground G and is stably disposed.

[0049] An operator, for example a driver of a feed supply vehicle transporting feed, opens and closes the lid 6 to pour feed into the tank body 8. When the column 14 with the hanging arm is in the lowered position, the worker raises the column 14 with the hanging arm to the raised position and places it on the stopper portion 34.

[0050] Next, the worker rotates the winch 20 in the winding direction to wind up the first rope 18. As shown in Fig. 4, at the start of winding, the lid 6 is in the closed position. As the first rope 18 is wound up, the handle portion 6b (first rope attachment portion) of the lid 6 is pulled up toward the third pulley 44 of the hanging arm 24, and the lid 6 is gradually opened. At this time, the lid 6 is in a state of being suspended by the first rope 18 extending from the suspension arm 24.

[0051] As shown in FIG. 5, as the winch 20 is wound up, the lid 6 is gradually opened, and the lid 6 can be opened further to the opening side than above the hinge portion 12. At this time, the pillar-shaped member 22 is located at a rear position on the side of the hinge portion 12 and away from the opening portion 8b of the lid 6. Since the pillar-shaped member 22 is placed on the plane of the stopper 38, it can be rotated by a manual rotation operation or by its own rotation receiving the force of the first rope 18. Therefore, the pillar-shaped member 22 itself is rotated in response to the winding of the winch 20, and the hanging arm 24 connected to the pillar-shaped member 22 is also rotated in the same manner. The hanging arm 24 is rotated further toward the opening side (lid open position side) than above the hinge portion 12. The pillar-shaped member 22 of the hanging arm 24 may be rotated about the central axis B by a manual or electric rotation operation. In this way, the lid 6 is pulled up by the first rope 18 toward the hanging arm 24, and is opened further to the opening side than the top of the hinge part 12. After the lid 6 is opened further to the opening side than the top of the hinge part 12, the lid 6 can move further to the opening side due to its own weight. Therefore, the worker stops the operation of winding the winch 20, reverses the rotation direction of the winch 20, and then uses the mechanism to let out the first rope 18.

[0052] Next, the worker rotates the winch 20 in the payout direction to pay out the first rope 18. Thus, the lid 6 is gradually opened. The lid 6 is suspended by the first rope 18 extending from the suspension arm 24. At this time, the first rope 18 applies an upward force (a pulling force) to the lid 6, preventing the lid 6 from dropping toward the tank body 8 and colliding with it. Therefore, the lid 6 is lowered toward the tank body 8 at a gentle speed, preventing the lid 6 from colliding with the tank body 8 and preventing the tank body 8 from being damaged.

[0053] As shown in Figures 6 and 7, the first rope 18 is further fed by the winch 20, and the lid 6 is opened to an open position at the same height as the opening position 8b or at a lower height than the opening position 8b. In this embodiment, the lid 6 is stopped in the open position while in contact with the upper surface of the tank body 8, but a seat or the like may be formed on the upper surface of the tank body 8 and the lid 6 may be seated on the seat. Also, the lid 6 may be stopped in the open lid position by stopping the winch 20 without contacting the tank body 8. With the lid 6 in the open position, the worker stops the rotation of the winch 20.

[0054] Next, the worker removes the stopper from the stopper guide , as shown in FIG. This allows the columnar member 22 to descend while passing between the stopper guides 36. As the columnar member 22 descends, the second rope 50 is pulled toward the columnar member 22, and the second rope 50 causes the weight portion 52 to rise. When the columnar member 22 descends, the force of the weight portion 52 acts in a direction to pull up the columnar member 22 . This allows the speed at which the columnar member 22 descends to be slower than the speed at which the columnar member 22 freely falls, and also increases safety when the columnar member 22 descends.

[0055] As shown in FIG. 9, the columnar member 22 and the suspending arm 24 are lowered to the lowered position, and the suspending arm 24 is rotated to a position where the suspending arm 24 does not interfere with the opening portion 8b of the tank body 8 when viewed from above. Since the pillar-shaped member 22 and the hanging arm 24 are rotatable about the central axis B, the hanging arm 24 can be moved to a position where it is less likely to interfere with the introduction of feed into the opening portion 8b. After the columnar member 22 and the hanging arm 24 are lowered to the lowered position, the operator extends the supply part 60 extending from the feed supply cart that supplies feed to the feed tank 4 to directly above the opening part 8b. Since the pillar member 22 and the hanging arm 24 are lowered to the lowered position, the feed supply part 60 of the feed supply cart can be easily extended to the vicinity of the opening portion 8b without interfering with the pillar member 22 and the hanging arm 24. Therefore, the efficiency of the feed input operation by the worker can be improved. The feed supply unit 60 is, for example, a feed arm consisting of a boom extending from a feed supply vehicle.

[0056] Next, the feed is poured from the feeder 60 through the opening 8b into the tank body 8. After the feed has been poured in, the feeder 60 is removed from the opening 8b. The worker raises the columnar member 22 and the hanging arm 24 from the lowered position to the raised position. The worker operates the lower lever 22c to raise the lower end 22b of the columnar member 22 to a height higher than the stopper guide 36, and then attaches the stopper portion 34 to the stopper guide 36, and positions the columnar member 22 on the stopper portion 34. Thus, the post 22 and the suspension arm 24 are placed in the raised position.

[0057] Next, the worker rotates the winch 20 in the winding direction to wind up the first rope 18. As shown in Fig. 10, at the start of winding, the lid 6 is in the open position. As the first rope 18 is wound up, the handle portion 6b of the lid 6 is pulled up toward the third pulley 44 of the hanging arm 24, and the lid 6 is gradually closed. At this time, the lid 6 is in a state of being suspended by the first rope 18 extending from the suspension arm 24.

[0058] As shown in FIG. 11, as the winch 20 winds up, the lid 6 is gradually closed, and the tip 6a of the lid 6 can be closed further than above the hinge portion 12 (toward the opening portion 8b than the hinge portion 12). At this time, the pillar-shaped member 22 is located to the side of the hinge portion 12 and is rotatable, so that as the winch 20 winds up, the pillar-shaped member 22 itself rotates, and the hanging arm 24 connected to the pillar-shaped member 22 also rotates in the same manner. Therefore, the hanging arm 24 is rotated toward the opening portion 8b side from the upper side of the hinge portion 12. The columnar member 22 of the hanging arm 24 may be rotated about the central axis B by a manual or electric rotating operation. In this way, the lid 6 is pulled up by the first rope 18 toward the hanging arm 24 and closed up to the opening position 8b side from above the hinge part 12. After the tip part 6a (and the handle part 6b) of the lid 6 is pulled up to the opening position 8b side from above the hinge part 12, the lid 6 can move further toward the closing side due to its own weight. Therefore, the worker stops the operation of winding the winch 20, reverses the rotation direction of the winch 20, and then uses the mechanism to let out the first rope 18.

[0059] Next, the worker rotates the winch 20 in the direction to let out the first rope 18. Thus, the lid 6 is gradually closed. The lid 6 is in a state of being suspended by the first rope 18 extending from the suspension arm 24. At this time, the first rope 18 applies an upward force (pulling force) to the lid 6, preventing the lid 6 from dropping forcefully toward the opening portion 8b of the tank body 8 and colliding with it. Therefore, the lid 6 is lowered at a gentle speed toward the opening portion 8b of the tank body 8, preventing the lid 6 from colliding with the opening portion 8b of the tank body 8 and preventing damage to the tank body 8.

[0060] As shown in FIG. 4, the first rope 18 is further fed by the winch 20, and the lid 6 is closed to the closed position at the opening portion 8b. With the lid 6 in the closed position, the worker stops the rotation of the winch 20.

[0061] According to one embodiment of the present invention configured as described above, the lid 6 can be opened from a closed position where the opening portion 8b is closed to a supine open position at the same height as the opening portion 8b or lower than the opening portion 8b while the lid 6 is suspended by the first rope 18 extending from the support 14 with the hanging arm. Therefore, the worker can open the lid 6 to the supine open position where it is unlikely to interfere with the feed arm, i.e., the boom, of the feed supply vehicle that supplies feed to the opening portion 8b at the top of the feed tank 4. This improves the operability of the feed supply operation by the worker.

[0062] According to one embodiment of the present invention configured in this manner, with the lid 6 suspended by the first rope 18 extending from the support 14 with a hanging arm, the lid 6 is opened from a closed position in which the opening portion 8b is closed to an open position in a supine state, which is at the same height as the opening portion 8b or lower than the opening portion 8b. This allows an operator to operate the first rope 18 from below the feed tank 4, and with the lid 6 suspended by the first rope 18 extending from the support 14 with a hanging arm, the lid 6 can be opened from a closed position in which the opening position 8b is closed to an open position in a supine position, which is at the same height as the opening position 8b or lower than the opening position 8b. Therefore, by operating from below the feed tank 4, an operator can open the lid to the supine open position which is less likely to interfere with the feed supply section 60 of the feed supply vehicle which supplies feed to the opening position 8b at the top of the feed tank 4. This improves the workability of the worker in supplying feed. In addition, for example, even when the feed tank has a height of several meters, the labor of the workers can be reduced. In addition, for example, the amount of work done by workers outdoors at heights can be reduced, and the safety of workers on rainy or snowy days can be improved.

[0063] Furthermore, according to one embodiment of the present invention, the hanging arm support 14 is supported by the support part 16 so that it can move vertically, and the hanging arm support 14 can be positioned at an upper position where the upper end of the hanging arm support 14 is above the top of the feed tank 4, and at a lower position where the upper end of the hanging arm support 14 is below the top of the feed tank 4. This allows the lid 6 to be hung from above the lid 6 when opening or closing it, and when supplying feed to the opening position 8b at the top of the feed tank 4, the support 14 with the hanging arm can be positioned at a lower position below the top, making it less likely that the support 14 with the hanging arm will interfere with the supply section 60 of the feed supply vehicle. Therefore, the workability of the worker in supplying feed can be further improved.

[0064] Furthermore, according to one embodiment of the present invention, the device further includes a second rope 50 extending from the attachment portion of the first rope 18 of the suspension arm-attached support 14, and a weight portion 52 to which the second rope 50 is attached. As a result, when the support 14 with a hanging arm moves downward, the weight portion 52 applies an upward force to the support 14 with a hanging arm, and when the support 14 with a hanging arm moves upward, the weight portion 52 can act to assist the support 14 with an upward force. Therefore, when the hanging arm column 14 moves downward, the risk of the hanging arm column 14 falling and injuring the worker's feet can be reduced, and when the hanging arm column 14 moves upward, the force with which the worker lifts the hanging arm column 14 can be reduced, thereby reducing the workload of the worker. This improves the ease with which a worker can raise and lower the suspension arm-equipped support 14.

[0065] Furthermore, according to one embodiment of the present invention, the weight of the post with hanging arms 14 is greater than the weight of the weight portion 52, and the weight of the weight portion 52 is greater than 70% of the weight of the post with hanging arms 14. This reduces the risk of the suspension arm column 14 falling and injuring the worker's feet when the suspension arm column 14 moves downward, and reduces the force required by the worker to lift the suspension arm column 14 when the suspension arm column 14 moves upward, thereby reducing the workload of the worker. [Explanation of symbols]

[0066] 1: Lid opening and closing device 4: Feed tank 6: Lid 8a:Top 8b: Opening part 8c: Discharge port 10: Support leg 14: Support with hanging arm 16: Support part 22: Columnar member 22a: Upper end 24: Hanging arm 30: Support pillar 52: Weight section

Claims

1. A lid opening and closing device for a feed tank, comprising: a hinged lid that opens and closes between an open lid position in a supine position and a closed lid position in a dorsal position, the hinged lid being provided at a feed input opening located at the top of the feed tank, the lid opening and closing device being attached to the feed tank; A lid opening and closing device for a feed tank, in which the hinged lid is suspended by a cord-like member extending from a hanging arm, and the hinged lid is opened from a closed lid position in the supine position that closes the feed inlet opening to an open lid position in the supine position that is at the same height as the feed inlet opening or at a lower height than the feed inlet opening.

2. The feed tank lid opening and closing device includes: The feed tank is at least configured with a column-shaped member provided on a side of the feed tank and a hanging arm extending laterally from an upper portion of the column-shaped member, and a rope-shaped member extending from a lower portion of the feed tank to the hinged lid via the hanging arm, The support with the hanging arm is provided so as to be rotatable about a central axis extending in a vertical direction of the support with the hanging arm, the central axis protruding upward from the feed-inlet opening portion of the top of the feed tank, A lid opening and closing device for a feed tank as described in claim 1, wherein, while the hinged lid is suspended by the cord-like member extending from the hanging arm, the hinged lid is opened from a closed lid position in the supine position that closes the feed inlet opening to an open lid position in the supine position that is at the same height as the feed inlet opening or at a lower height than the feed inlet opening.

3. Further, a support part is provided to support the support column with the hanging arm so as to be movable in the up and down direction, A feed tank lid opening and closing device as described in claim 2, wherein the support portion is formed so that it can be positioned at an upper position where the upper end of the suspension arm support is above the top of the feed tank, and at a lower position where the upper end of the suspension arm support is below the top of the feed tank.

4. A lid opening and closing device for a feed tank as described in claim 3, comprising: a weight side rope-like member extending from a rope-like member mounting portion of the support with a hanging arm; a pulley for a weight side rope-like member that is provided above the rope-like member mounting portion and on which the weight side rope-like member is hung; and a weight portion to which the weight side rope-like member is attached.

5. The weight of the support with the hanging arm is greater than the weight of the weight portion, 5. The feed tank lid opening and closing device according to claim 4, wherein the weight of the weight portion is heavier than 70% of the weight of the support column with the hanging arm.

6. A feed tank with a lid opening and closing device, wherein a support column constituting a support part of the feed tank lid opening and closing device described in any one of claims 2 to 4 is fixed and supported by a support leg attached to the side of the lower part of the tank body of the feed tank.

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