JP4879594B2 - Underwater equipment attachment / detachment device and underwater equipment lifting / lowering operation device using the same - Google Patents

Description

  The present invention relates to an attachment / detachment device for attaching / detaching an underwater device used underwater to / from a lifting device and a lifting / lowering operation device for an underwater device using the same.

  Conventionally, when installing underwater equipment such as an underwater mixer in a sewage tank, a chain is attached to each underwater equipment, and during installation, the underwater equipment is suspended in the sewage tank using this chain. During maintenance and inspection of underwater equipment, the underwater equipment is lifted from the sewage tank by a chain. And generally, when using an underwater apparatus, it uses it in the state which engaged the upper end part of the chain | strand with the tank upper part.

  However, when the upper end of the chain is engaged, the slack of the chain may become excessive. In that case, the chain is caught in the moving part (rotating part) of the underwater device, and the underwater device is damaged. And may cause chain breakage.

  Further, during long-term use, the water chains are swung by the water flow and rubbed with each other, and the devices and the chains and the chain rings are rubbed together, resulting in damage to the devices and wear and cutting of the chains.

  Furthermore, since it is necessary to attach a chain to each device, it is necessary to prepare a large number of chains in a large-scale treatment plant that handles a large number of units. I can't.

In order to avoid these problems, for example, as shown in Patent Document 1 and Patent Document 2, etc., an attachment / detachment device that can be attached to and detached from the underwater device is attached to a lifting device such as a hoisting machine for hanging the underwater device. There has been proposed an apparatus in which an elevating device and an underwater device can be attached and detached underwater without using a chain.
German Patent Publication No. 2849877 JP-A-9-170599

  However, in the above-mentioned conventional Patent Documents 1 and 2, not only the number of parts is large, but also the lifting device and the underwater device are attached and detached with a complicated operation by using a spring device, etc. There were problems in terms of operational reliability and operational stability.

  The present invention has been made in view of the above points, and an object of the present invention is to improve the structure of the attaching / detaching device provided in the lifting device, so that the lifting device and the underwater device can be attached / detached with a simple operation with a small number of parts. The purpose is to reduce the number of parts and to improve the operational reliability and operational stability.

  In order to achieve the above object, according to the present invention, a hook body having two engaging portions for installation and lifting is provided so as to be swingable about a horizontal axis as an attachment / detachment device provided in an elevating device. When installing the underwater device, the underwater device is suspended and moved downward by the installation engagement portion.When the underwater device is installed, the hook body is rotated by its own weight to engage the installation engagement portion with the underwater device. On the other hand, when the underwater device is lifted, the hook body is moved downward, and the hook body is rotated against its own weight by the contact between the lifting engagement portion and the underwater device, so that the underwater device is moved to the lifting engagement portion. After that, the hook body was rotated by its own weight so that the lifting engaging portion and the underwater device were engaged.

  Specifically, the invention of claim 1 is directed to an attachment / detachment device for attaching / detaching an underwater device that is suspended by an elevation device and moves up and down between water and water.

  The attachment / detachment device includes a frame that is suspended from the lifting device and a hook body that is swingably supported by the frame with a horizontal rotation axis. The hook body includes a first engaging portion that is engaged with a suspension portion of the underwater device when the underwater device is lifted by the lifting device, and a case where the underwater device is detached from the lifting device and installed in the water. A second engagement portion that is engaged with the suspension portion, and in a no-load state, the first engagement portion is on an extension line that connects the pivot axis of the hook body and the center of gravity of the hook body. It is set so that it is in a no-load posture in which the second engaging portion is positioned and shifted in phase in the swing direction with respect to the first engaging portion.

  Further, when the hook body is moved down in the above-mentioned no-load posture, the hook body is rotated by contact with the suspension section of the underwater device at the installation position, and the suspension section is engaged with the first engagement section. A first guide portion that guides the underwater device to be engaged, and when the hanging portion of the underwater device engages with the second engagement portion and moves downward, the underwater device is rotated to a no-load posture at the installation position. The engagement between the suspension part and the second engagement part is released.

  According to the above configuration, when the underwater device is submerged and installed, the underwater device is engaged with the second engagement portion of the hook body in the detachable device at the hanging portion. In this state, since the suspension load of the underwater device is applied to the second engagement portion of the hook body, the second engagement portion is positioned at or immediately below the pivot axis of the hook body from the unloaded posture. Rotate to change. In this state, the underwater device descends from the water position by the lowering operation of the lifting device and sinks into the water. When the underwater device reaches the installation position and the descent stops, and only the hook body (detachment device) is relatively lowered, the hook body does not move in the direction in which the second engagement portion is disengaged from the suspended portion of the underwater device. Rotates to load posture. As a result, the engagement between the second engaging portion and the hanging portion of the underwater device is released, and the underwater device is separated from the lifting device. Thereafter, the lifting / lowering device lifts the detachable device onto the water in an unloaded state.

  On the other hand, when the underwater device in the water is engaged with the attachment / detachment device and pulled up onto the water, the attachment / detachment device is placed in an unloaded state, and the hook body is placed in an unloaded posture so that the attachment / detachment device is submerged in the lowering operation. The descending hook body comes into contact with the suspended portion of the underwater equipment in the first guide portion, and the hook body is pushed by the contact between the first guide portion and the suspended portion, and rotates from the no-load posture. Then, the suspension part is guided so as to engage with the first engagement part. When the hanging part is completely engaged with the first engaging part by further lowering of the hook body, the guide restriction is removed by the hanging part, and the hook body rotates in the reverse direction by its own weight and returns to the no-load posture. . Thereafter, the lifting / lowering device is lifted and the detaching device and the underwater device engaged with the first engaging portion of the hook body by the hanging portion are pulled up on the water.

  Accordingly, since the underwater device is installed or pulled up without using the chain in this way, damage to the device, chain wear and cut, and cost increase when the chain is used are not caused.

  In addition, as described above, simply by lifting and lowering the attachment / detachment device, the underwater device is automatically disengaged from the second engagement portion of the hook body to separate the underwater device from the attachment / detachment device, or the hook body. Since the underwater device can be connected to the attachment / detachment device by engaging the suspension portion of the underwater device with the first engagement portion, the operation reliability of the attachment / detachment device can be removed by attaching / detaching the lifting device and the underwater device with a simple operation. Performance and operational stability can be improved. Moreover, since the underwater device can be attached and detached with only one hook body, the number of parts can be reduced.

  In the invention of claim 2, a balance weight is provided for allowing the frame to be suspended in a horizontal state in the load-free posture of the hook body. Thus, the first engaging portion of the hook body is stably positioned on the extension line connecting the pivot axis of the hook body and the center of gravity of the hook body, The disengagement operation can be performed stably.

  According to a third aspect of the present invention, the frame is guided so as to come into contact with the hanging portion of the underwater device when the hook body moves down in a no-load posture and to bring the hanging portion into contact with the first guide portion. A second guide part is provided to face the first guide part.

  Thus, when the suspended portion of the underwater device is engaged with the first engaging portion of the hook body, the positions of the suspended portion of the underwater device and the first guide portion of the hook body are in contact with each other. Even if the horizontal direction is shifted to such an extent that it does not, the suspended portion comes into contact with the second guide portion on the frame side, and by this contact, the suspended portion is guided so as to contact the first guide portion. Thus, the suspended portion can be smoothly engaged with the first engaging portion, and the engagement between the suspended portion and the first engaging portion of the hook body can be performed more reliably. Moreover, it can also be controlled by a 2nd guide part that a suspending part remove | deviates from the 1st engaging part of a hook body by the unexpected impact etc. at the time of pulling up of underwater equipment.

  According to a fourth aspect of the present invention, the frame is supported by a guide member that guides the underwater equipment to be raised and lowered. By this, using the guide member which raises / lowers the underwater device, the attachment / detachment device can be moved up and down stably and smoothly by the guide member. In addition, since the attachment / detachment device is guided by the guide member for the underwater device, the attachment / detachment device can be easily positioned with respect to the hanging portion when the underwater device is installed.

  According to a fifth aspect of the present invention, in the apparatus for attaching / detaching an underwater device according to the fourth aspect, the frame is cantilevered so as to be movable up and down by one guide member, and a horizontal displacement amount around the guide member of the hook body is the first. One guide portion is made smaller than the horizontal length.

  In this way, even if there is a gap for the up-and-down movement between the frame and the guide member, and the backlash around the guide member of the frame is generated by the gap, the first guide part is used as the hanging part of the device. It can be made to contact reliably and the engagement operation of a 1st engaging part and a hanging part can be performed reliably.

  In the invention of claim 6, the underwater device is an underwater pump, an underwater aerator, or an underwater mixer. As a result, an optimum underwater device in which the effects of the present invention are effectively exhibited can be obtained.

  According to a seventh aspect of the present invention, there is provided a device for raising and lowering an underwater device including the attachment / detachment device for the underwater device according to any one of the first to sixth aspects. Thus, an ascending / descending operation device for an underwater device capable of achieving the same effect as that of the first aspect can be obtained.

  As described above, according to the first and seventh aspects of the present invention, as an attachment / detachment device for attaching / detaching the underwater device to / from the lifting device, the frame suspended from the lifting device and the horizontal pivot axis in the frame. And a hook body supported so as to be swingable. The hook body lifts and lowers the underwater device with a first engagement portion that is engaged with a suspension portion of the underwater device when the underwater device is lifted by the lifting device. A second engaging portion that is engaged with the hanging portion when being detached from the apparatus and installed in the water, and the first engaging portion is the pivot axis of the hook body in a no-load state. Is set on the extension line connecting the center of gravity of the hook body and the second engagement portion so as to be in an unloaded posture in which the phase is changed in the swing direction with respect to the first engagement portion. , Contact with the suspended part of underwater equipment when moving down in its unloaded posture A first guide portion is provided for guiding the hook body to be engaged with the first engagement portion by rotating the hook body, and the suspension portion of the underwater device is engaged with the second engagement portion and lowered. When the device is moved, the hook body is rotated to the no-load posture at the installation position of the underwater device so that the engagement between the hanging portion and the second engaging portion is released. Accordingly, the underwater device hanging portion is automatically disengaged from the second engagement portion of the hook body to separate the underwater device from the attachment / detachment device, or the underwater device suspension is suspended from the first engagement portion of the hook body. The underwater device can be connected to the attachment / detachment device by engaging the lowering part, and while reducing the number of parts, the lifting device and the underwater device can be attached / detached with a simple operation to ensure the operational reliability and stability of the attachment / detachment device. It is possible to improve the performance.

  According to the invention of claim 2, by providing the balance weight for allowing the frame to be suspended in the horizontal state in the load-free posture of the hook body, the first engaging portion of the hook body is rotated by the hook body. It can be stably positioned on the extension line connecting the shaft center and the center of gravity of the hook body, and the engagement operation and the engagement release operation by the rotation of the hook body can be stably performed.

  According to the invention of claim 3, by providing the frame with the second guide portion that guides the suspension portion of the underwater equipment so as to contact the first guide portion, the first engagement between the suspension portion and the hook body. Engagement with the joint portion can be performed more reliably, and the second guide portion can restrict the suspension of the hanging portion from the first engagement portion of the hook body when the underwater device is pulled up.

  According to the fourth aspect of the present invention, the frame is supported by the guide member for raising and lowering the underwater device so as to be movable up and down, so that the attachment and detachment device can be stabilized using the guide member for raising and lowering the underwater device. Thus, the detachable device can be easily positioned with respect to the suspended portion of the underwater device.

  According to the invention of claim 5, the frame is cantilevered so as to be able to move up and down on one guide member, and the horizontal displacement around the guide member of the hook body is larger than the horizontal length of the first guide portion. By reducing the size, even if there is a backlash around the guide member of the frame, the first guide portion is securely brought into contact with the suspension portion of the device, and the engagement operation between the first engagement portion and the suspension portion is ensured. Can be done.

  According to the sixth aspect of the present invention, since the underwater device is an underwater pump, an underwater aerator, or an underwater mixer, an optimum underwater device in which the effect of the present invention is effectively exhibited can be obtained.

  Hereinafter, the best embodiment of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or its application.

(Embodiment 1)
4 and 5 show an elevating device A for underwater equipment according to an embodiment of the present invention. 1 is a sewage tank in which sewage is stored, 2 is a tank bottom of the sewage tank 1, and 3 is a base installed so as to protrude horizontally above the surface of the sewage in the sewage tank 1, Between the base 3 and the tank bottom 2, a columnar guide member 6 made of, for example, a rectangular tube extending in the vertical vertical direction is erected. The upper end portion of the guide member 6 is attached and fixed to the front end side surface of the base 3 at the rear surface (left side surface in the figure), and the lower end portion is fixedly attached to the receiving base 4 installed on the upper surface of the tank bottom 2. This guide member 6 constitutes an installation means for installing an underwater mixer 10 to be described later, and a stopper 7 extending horizontally to the front side (right side in the drawing) and a rear oblique side are disposed near the tank bottom 2. A supporting leg 8 extending downward is integrally projected, and a lower end portion of the supporting leg 8 is fixed to the tank bottom 2 on the rear side of the cradle 4. The supporting leg 8 reinforces the standing state of the guide member 6. is doing.

  An underwater mixer 10 as an underwater device is supported on the guide member 6 so as to be movable up and down. The underwater mixer 10 is built into the motor housing 11 and the motor housing 11, and an output shaft (not shown) whose front end portion penetrates the motor housing 11 in a liquid-tight manner and projects in the horizontal direction toward the front side of the motor housing 11. And an impeller 12 (propeller) attached to the front end of the output shaft of the motor so as to rotate together. The impeller 12 is rotated by the electric motor to flow horizontally in the sewage in the sewage tank 1. And stir the sewage. Note that a power cable (not shown) of the electric motor penetrates the motor housing 11 in a liquid-tight manner and extends to the outside.

  A slide portion 13 extending in the vertical direction is integrally attached to the rear end portion of the motor housing 11. The slide portion 13 has a substantially U-shaped cross section and is externally fitted to the guide member 6 from the front side. The upper and lower end portions of the slide portion 13 protrude rearward, and rollers (not shown) are rotatably supported between the upper and lower protruding portions, respectively, with horizontal and horizontal axis centers. The underwater mixer 10 can be moved up and down by the guide member 6 by sliding the roller along the guide member 6, and the underwater mixer 10 is seated on the stopper 7 at the lower end installation position (installation position). I try to install it.

  In addition, a hanging portion 14 is integrally projected from the upper portion of the motor housing 11. The hanging portion 14 is formed, for example, by bending a rod member into a substantially inverted V shape, and is along a vertical plane in the front-rear direction with the intermediate bent portion positioned at the upper end and both ends positioned at the lower end. The lower end portions (both end portions) of the motor housing 11 are fixedly attached to the upper portion of the motor housing 11 in a state where they are arranged in the front-rear direction.

  A support column 17 is erected on the base 3, and a suspension arm 18 is attached to the upper end of the support column 17 so that the tip of the support column 17 is positioned almost directly above the underwater mixer 10 at the installation position. A hoisting machine 19 as a lifting device that lifts and lowers the submerged mixer 10 along the guide member 6 is suspended from the tip of the suspension arm 18. Although not shown, the winder 19 rotates the winding drum (winding sprocket) by a built-in drive motor and winds the winding chain 20 around the winding drum or feeds it from the winding drum, which will be described later. The underwater mixer 10 is moved up and down via the attachment / detachment device 24. When the winding machine 19 is wound up and the winding chain 20 is wound around the take-up drum, the attachment / detachment device 24 (underwater mixer 10) is raised. When the winding chain 20 is fed out from the winding drum by the feeding operation, the attachment / detachment device 24 (underwater mixer 10) is lowered.

  An attachment / detachment device 24 according to an embodiment of the present invention is attached to the lower end portion of the winding chain 20. This attachment / detachment device 24 is for attaching / detaching the underwater mixer 10 that is suspended by the winding machine 19 by the winding chain 20 and moves up and down between the water and the water to / from the winding chain 20 (winding machine 19). As shown in detail in FIG. 3, the hoist 19 has a frame 25 that is suspended by the hoisting chain 20. The frame 25 includes a frame main body 26 having a U-shaped cross section that is open on the lower side and extends in the front-rear direction. Eye bolts 27 are provided at the front end (right end in FIG. 2) and rear end of the upper surface of the frame main body 26, respectively. It is fixed. Each eyebolt 27 is connected to the lower ends of the chains 28, 28 having the same length, and the upper ends of both the chains 28, 28 are connected to one connecting ring 29. The lower ends are connected, and an isosceles triangle is formed by the chains 28, 28 and the frame body 26 between the eyebolts 27, 27, and the connecting ring 29 at the upper end is positioned directly above the hook body 34 to be described later. It is supposed to be located in.

  A slide portion 31 is integrally attached to the rear end portion of the frame body 26 via a connecting portion 30. As shown in FIGS. 2 and 3, the slide portion 31 is formed by bending a bar member into a U-shape, and the guide member 6 that guides the submerged mixer 10 up and down leaves the center portion of the rear surface. It is mated. That is, the frame 25 is cantilevered and supported by the single guide member 6 by the slide portion 31 at the rear end, and the detachable device 24 is guided by sliding the slide portion 31 along the guide member 6. The member 6 is supported so as to be movable up and down.

  A pair of front and rear brackets 32 and 32 extending downward are provided at a central portion on the lower surface of the frame main body 26 (may be a substantially central portion on the front and rear) with a gap therebetween, and a hook body 34 is provided between the brackets 32 and 32. It is supported so as to be swingable through a pin 33 having a horizontal longitudinal axis. In other words, the hook body 34 swings with respect to the frame 25 in a horizontal vertical plane perpendicular to the vertical vertical plane along the hanging portion 14 of the underwater mixer 10 with a horizontal longitudinal axis of rotation. Supported as possible.

  The hook body 34 is formed by processing, for example, a thick plate material. As shown in FIG. 1, when the underwater mixer 10 is lifted by the hoisting machine 19, the first body is engaged with the hanging portion 14 of the underwater mixer 10. It is located on the right side (right side in FIG. 1) of the joint portion 35 and the first engagement portion 35 and is engaged with the suspension portion 14 when the underwater mixer 10 is detached from the hoist 19 and installed in the water. A second engaging portion 36, a balance portion 37, and a first guide portion 38.

  Specifically, when the hook body 34 is in a no-load posture, which will be described later, the first engagement portion 35 moves upward from the pin 33 that is the pivot axis of the hook body 34 and then moves upward on the left side. It is formed in a hook shape that is curved. On the other hand, the second engaging portion 36 is formed in a hook shape that curves from the pin 33 to the right side (right side in FIG. 1) obliquely downward and then curved upward on the left side. That is, any of the engaging portions 35 and 36 has a hook shape that can be engaged with the hanging portion 14 of the underwater mixer 10, and each inside (portion where the hanging portion 14 enters) is on the pin 33 side (rotation axis). The suspended portion accommodation position of the first engagement portion 35 and the suspension portion accommodation position of the second engagement portion 36 are the same as the suspension portion accommodation position of the second engagement portion 36. 1 is shifted by a predetermined phase angle θ in the counterclockwise direction in FIG.

  Further, the balance portion 37 extends from the pin 33 to the left side (left side in FIG. 1), that is, obliquely downward toward the first engagement portion 35 on the opposite side to the second engagement portion 36, and this balance portion. The weight of 37 is set to be equal to that of the second engaging portion 36, and in the no-load state where the underwater mixer 10 is not engaged by the first or second engaging portion 35, 36, the hook body 34 is The first engaging portion 35 (specifically, the suspended portion accommodation position) is on an extension line connecting the rotation axis (pin 33) of the hook body 34 and the center of gravity of the hook body 34 (in other words, the rotation of the hook body 34). The second engagement portion 36 is set to be in a no-load posture that is located at a position that is shifted by an angle θ in the swing direction with respect to the first engagement portion 35. Yes.

  Further, the first engaging portion 35 is formed with an extension portion 35a extending from the tip portion to the diagonally lower right side opposite to the tip portion, and the extension portion 35a and the tip portion of the first engagement portion 35 are formed. The first guide portion 38 is configured. The first guide portion 38 has a guide surface 39 having, for example, an intermediate convex arc shape extending over the outer surface of the distal end portion of the first engaging portion 35 or the outer surface of the extension portion 35a, and the hook body 34 is lowered in the above-described unloaded posture. When moved, the hook body 34 is pivoted counterclockwise in FIG. 1 by hanging the upper end of the suspension 14 of the submerged mixer 10 against the guide surface 39 of the first guide 38. The part 14 is guided to be engaged with the first engaging part 35.

  Then, when the hook body 34 is moved downward by engaging the suspending portion 14 of the submersible mixer 10 with the second engaging portion 36, the hook body 34 is rotated to an unloaded posture at the installation position of the submersible mixer 10. The lower portion 14 and the second engaging portion 36 are configured to be disengaged.

  Further, as shown in FIG. 6, the hook body 34 rotates around the guide member 6 by a gap for sliding between the slide portion 31 of the frame 25 and the guide member 6 to which the slide portion 31 is externally fitted. The amount of displacement a is set to be smaller (a <b) than the horizontal length b of the guide surface 39 of the first guide portion 38.

  Further, a balance weight 41 is attached and fixed to the front end portion of the lower surface of the frame body 26 so that the frame 25 can be suspended in a horizontal state with no load of the hook body 34.

[Operation of Embodiment 1]
Next, the operation of the above embodiment will be described. First, when the underwater mixer 10 that is in the water of the sewage tank 1 and is supported on the stopper 7 of the guide member 6 is engaged with the attachment / detachment device 24 for maintenance and inspection, etc., is pulled up to the water outside the sewage tank 1. Will be described with reference to FIG.

  The winding machine 19 is in a state where the winding chain 20 is wound around the winding drum, and the hook body 34 of the attachment / detachment device 24 attached to the lower end of the winding machine 19 is set to an unloaded posture in which no load is applied. Is fed out to feed out the winding chain 20 from the winding drum. As a result, as shown in FIG. 4, the attachment / detachment device 24 moves down along the guide member 6 by its own weight and sinks into the sewage tank 1.

  As shown in FIG. 7A, when the attaching / detaching device 24 descending approaches the upper end of the hanging portion 14 of the underwater mixer 10 on the stopper 7 and the attaching / detaching device 24 further descends, as shown in FIG. 7B. The guide surface 39 of the first guide portion 38 of the hook body 34 comes into contact with the upper end portion of the hanging portion 14. Since the guide surface 39 of the first guide portion 38 is an arcuate convex surface inclined upward toward the left side, the hook body 34 is pushed from the suspension portion 14 by further downward movement of the attachment / detachment device 24. As shown in FIG. 7C, the hook body 34 rotates in the same direction around the pin 33 from the unloaded posture. Simultaneously with this rotation, the suspension part 14 slides upward on the guide surface 39 of the first guide part 38. When the hook body 34 is rotated while descending in this way, the attachment / detachment device 24 reaches, for example, the lower end position, and the upper end portion of the hanging portion 14 passes the tip of the first engagement portion 35, FIG. ), The hook body 34 is released from the moment by the suspending portion 14, and rotates in the clockwise direction in the reverse view of the above rotation due to its own weight to return to the no-load position.

  In this state, when the winding machine 19 is reversely wound up and the winding chain 20 is wound around the winding drum and the detaching device 24 is pulled up, the hanging portion 14 is suspended in the first engaging portion 35. Enters the part receiving position and is engaged. Thereafter, when the winding operation of the hoisting machine 19 is continued, the attaching / detaching device 24 rises, and the underwater mixer 10 engaged with the attaching / detaching device 24 also rises from the stopper 7 along the guide member 6. The attaching / detaching device 24 and the underwater mixer 10 are pulled up on the water surface at the rising end position. The pulled-up underwater mixer 10 may be separated from the attachment / detachment device 24 on the base 3, for example, and removed from the hoisting machine 19, and inspected.

  On the other hand, FIG. 8 demonstrates the case where the submerged mixer 10 after the said inspection is reinstalled in the water of the sewage tank 1, or the case where the new submerged mixer 10 is installed in the sewage tank 1 first. With respect to the detachable device 24 suspended from the hoisting chain 20 of the hoisting machine 19 on the water, this time using the second engaging portion 36 instead of the first engaging portion 35 of the hook body 34, The submerged mixer 10 is engaged with the second engaging portion 36 by the suspension portion 14. At that time, for example, the hook body 34 is manually rotated in FIG. 8 (FIG. 1) in the clockwise direction to change the second engaging portion 36 from the no-load posture so as to be positioned on the lower side. After inserting the suspension part 14 of the submerged mixer 10 into the joint part 36, the winding machine 19 is wound up to raise the attachment / detachment device 24 once, and as shown in FIG. The upper end portion of the hanging portion 14 is engaged with the joint portion 36. In this state, the suspension load of the underwater mixer 10 is applied to the second engagement portion 36 of the hook body 34, so that the hook body 34 is in the unloaded posture and the second engagement portion 36 is pivoted about the rotation axis of the hook body 34. The pin 33 is held in a state of being rotated and changed so as to be located directly under or near the pin.

  In this state, the hoisting machine 19 is unwound and the attaching / detaching device 24 descends along the guide member 6, and as shown in FIG. 5, the underwater mixer 10 engaged with the second engaging portion 36 of the hook body 34. Also descends from the water position along the guide member 6 and sinks into the water.

  Then, when the submersible mixer 10 moves to the installation position on the stopper 7 of the guide member 6 and the lowering stops, only the attaching / detaching device 24 is lowered by the continuous feeding operation of the hoist 19, as shown in FIG. Furthermore, the upper end portion of the hanging portion 14 of the submerged mixer 10 moves relatively to the tip side (upper side) of the second engaging portion 36 of the hook body 34 and is displaced in a direction away from the second engaging portion 36. When the hanging part 14 rises beyond the tip of the second engaging part 36 by further lowering of the hook body 34, the second engaging part 36 is detached from the hanging part 14 as shown in FIG. Thereafter, the detaching device 24 is lifted by the winding operation of the winder 19, and as a result, as shown in FIG. 8 (d), the hook body 34 is rotated counterclockwise in FIG. Returning to the load posture, the engagement between the second engaging portion 36 and the hanging portion 14 is completely released, and the underwater mixer 10 is separated from the attachment / detachment device 24. Thereafter, the take-up operation of the winder 19 raises the detachable device 24 in an unloaded state and pulls it up on the water. Thus, the installation of the underwater mixer 10 in water is completed.

[Effects of Embodiment 1]
Therefore, in this embodiment, since the chain is connected to the underwater mixer 10 and the submersible mixer 10 is not installed or pulled up using the chain, damage to the underwater mixer 10 when using the chain, There is no wear, cutting, or cost increase.

  Further, as described above, the suspension portion 14 of the underwater mixer 10 is engaged with the second engagement portion 36 of the hook body 34 in the attachment / detachment device 24 connected to the lower end portion of the winding chain 20 in the winding machine 19. Then, by simply lowering the attachment / detachment device 24 together with the underwater mixer 10 by the operation of the hoisting machine 19, the underwater mixer 10 is automatically suspended from the second engaging portion 36 of the hook body 34 at the installation position of the underwater mixer 10. The underwater mixer 10 can be separated by disengaging the lowering portion 14 to separate the underwater mixer 10 from the attachment / detachment device 24. On the other hand, simply by lowering the unloading attachment / detachment device 24 into the water, the suspension portion 14 of the underwater mixer 10 at the installation position is automatically engaged with the first engagement portion 35 of the hook body 34. The underwater mixer 10 can be connected to the detachable device 24 and then lifted. For this reason, the winder 19 and the underwater mixer 10 can be attached and detached with a simple operation, and the operation reliability and operation stability of the attachment / detachment device 24 can be improved. Moreover, since the underwater mixer 10 can be attached and detached with only one hook body 34, the number of parts can be reduced.

  Further, since the frame 25 of the attachment / detachment device 24 is supported by the slide portion 31 on the guide member 6 that guides the submersible mixer 10 up and down, using the guide member 6 that guides the submersible mixer 10 up and down, The guide member 6 can raise and lower the attachment / detachment device 24 stably and smoothly. Moreover, since the attachment / detachment device 24 is guided by the guide member 6 of the underwater mixer 10, the positioning of the first engagement portion 35 and the like of the attachment / detachment device 24 with respect to the hanging portion 14 is performed when the underwater mixer 10 is installed. Can be easily performed.

  The hook body 34 is horizontally horizontally moved around the guide member 6 by a gap for sliding between the slide portion 31 of the frame 25 in the attachment / detachment device 24 and the guide member 6 to which the slide portion 31 is externally fitted. Since the displacement amount “a” of the backlash that is displaced in the direction is smaller than the horizontal length “b” of the guide surface 39 that is the length of the first guide portion 38 in the guide direction, the gap between the frame 25 and the guide member 6 Even if there is a backlash around the guide member 6 of the frame 25, the guide surface 39 of the first guide portion 38 of the hook body 34 contacts the upper end portion of the suspension portion 14 as shown in FIG. When contacting, the 1st guide part 38 can be made to contact reliably with the suspension part 14 of the submerged mixer 10, and the engagement operation of the 1st engagement part 35 and the suspension part 14 can be performed reliably. .

  Further, since the balance weight 41 for attaching the frame 25 to the horizontal state in a state where the hook body 34 is not loaded is attached and fixed to the front end portion of the lower surface of the frame body 26 in the attachment / detachment device 24, the hook body 34, the first engaging portion 35 of the hook body 34 can be stably positioned on an extension line connecting the rotation axis of the hook body 34 and the center of gravity of the hook body 34. The disengagement operation can be performed stably.

  In this embodiment, the underwater mixer 10 is placed and installed on the stopper 7 of the guide member 6, but can also be placed on the tank bottom 2 and installed.

(Embodiment 2)
9 and 10 show a second embodiment of the present invention (in the following embodiments, the same parts as those in FIGS. 1 to 8 are denoted by the same reference numerals and detailed description thereof is omitted), and are attached / detached. The frame 25 of the device 24 is provided with a further guide part.

  That is, in this embodiment, the pair of front and rear brackets 32, 32 attached to the frame body 26 are extended downward, and the extended portions are substantially oblique so as to face the left side (the left side in FIG. 9) downward. The second guide portion 43 is formed so as to face the guide surface 39 of the first guide portion 38 of the hook body 34 in the front-rear direction by the notch portion, and the hook body 34 is in an unloaded posture. The second guide portion 43 is brought into contact with the suspension portion 14 of the submerged mixer 10 when the second guide portion 43 is moved downward, so that the suspension portion 14 is guided so as to contact the first guide portion 38. Other configurations are the same as those of the first embodiment.

[Operation of Embodiment 2]
In the second embodiment, the case where the underwater mixer 10 that is in the water of the sewage tank 1 and is supported on the stopper 7 of the guide member 6 is pulled up to the water outside the sewage tank 1 for maintenance and inspection will be described with reference to FIG. To do.

  After the winding machine 19 is in a state where the winding chain 20 is wound up and the hook body 34 of the attaching / detaching device 24 attached to the lower end of the winding machine 19 is not loaded, the winding machine 19 is fed out. When the winding chain 20 is unwound from the winding drum, the attachment / detachment device 24 moves downward along the guide member 6 due to its own weight and sinks into the sewage tank 1 underwater.

  Then, as shown in FIG. 10 (a), the detaching device 24 that descends approaches the upper end portion of the hanging portion 14 of the underwater mixer 10 on the stopper 7, but the upper end portion of the hanging portion 14 of the underwater mixer 10 and the hook If the positions of the first guide portion 38 of the body 34 and the guide surface 39 are greatly displaced in the horizontal left and right directions so that they do not contact each other, the contact between the suspended portion 14 and the first guide portion 38 is not changed. It becomes difficult.

  However, if the second guide portion 43 is provided on the brackets 32, 32 of the frame 25 so as to face the first guide portion 38 as in this embodiment, when the attachment / detachment device 24 is further lowered, FIG. As shown in (b), the suspension part 14 abuts on the second guide part 43 on the frame 25 side, and the frame 25 of the attachment / detachment device 24 is suspended on the guide surface 39 of the first guide part 38 along with this abutment. Guided to the left side of FIG. At this time, since the frame 25 has a backlash that can swing relative to the guide member 6, the frame 25 is guided by swinging around the guide member 6. Thereafter, the same movement as in the first embodiment is performed, and with the lowering movement of the attachment / detachment device 24, the contact between the guide surface 39 of the first guide portion 38 of the hook body 34 and the upper end portion of the hanging portion 14, The hook body 34 is pushed from the suspending portion 14 and receives a moment in the counterclockwise direction. As shown in FIG. 10C, the hook body 34 rotates in the same direction around the pin 33 from the no-load posture. At the same time, the hanging part 14 slides upward on the guide surface 39 of the first guide part 38. Then, when the upper end portion of the hanging portion 14 passes the tip of the first engaging portion 35, the hook body 34 is released from the moment from the hanging portion 14, and is rotated clockwise in a view opposite to the above rotation by its own weight. Rotate in the direction and return to the no-load position. Thereafter, when the hoisting machine 19 is wound up and the attachment / detachment device 24 is pulled up, the hanging part 14 enters the hanging part accommodation position in the first engaging part 35 as shown in FIG. As the winding machine 19 continues the winding operation, the attaching / detaching device 24 rises, and the underwater mixer 10 also rises from the stopper 7 along the guide member 6, and at the rising end position of the attaching / detaching device 24, the attaching / detaching device 24. And the underwater mixer 10 are pulled up on the water surface.

  In addition, since it is the same as that of the said Embodiment 1 at the time of installation of the underwater mixer 10, the description is abbreviate | omitted.

[Effects of Second Embodiment]
Therefore, this embodiment can provide the same effects as those of the first embodiment. Further, even when the underwater mixer 10 is lifted, even if the hanging portion 14 and the first guide portion 38 of the hook body 34 of the attaching / detaching device 24 are displaced so as not to contact each other, the hanging portion 14 can be smoothly moved. It can be made to engage with the 1st engaging part 35, and engagement with the hanging part 14 and the 1st engaging part 35 of the hook body 34 can be performed still more reliably.

  Further, since the brackets 32, 32 of the frame 25 of the attachment / detachment device 24 are extended downward to form the second guide portion 43, even if an unexpected impact or the like is applied to the underwater mixer 10 during lifting, the second guide The portion 43 can restrict the suspension portion 14 of the submerged mixer 10 from being disengaged from the first engagement portion 35 of the hook body 34.

  In this embodiment, when the attachment / detachment device 24 moves downward when the submersible mixer 10 is lifted, when the suspension portion 14 of the submersible mixer 10 contacts the second guide portion 43 on the lowering frame 25 side, the frame 25 is moved. The suspension member 14 is rotated by a backlash with respect to the guide member 6 and guided so that the suspension portion 14 comes into contact with the guide surface 39 of the first guide portion 38. 11 is provided so as to be swingable in the left-right direction in FIG. 10, and the suspension part 14 is guided relative to the attachment / detachment device 24 by contact with the second guide part 43. Also good.

(Embodiment 3)
11 to 13 show Embodiment 3 of the present invention. In each of the above-described embodiments, the underwater equipment is the underwater mixer 10, whereas the underwater aerator is applied.

  That is, in this embodiment, a pair of front and rear guide members 6, 6 made of a circular pipe are erected at a constant interval, and the lower ends of both guide members 6, 6 are fixed to the tank bottom 2. The air supply stand 50 is a circular pipe extending horizontally in the front-rear direction. A discharge pipe 51 protruding upward is connected to the upper surface of the central portion of the air supply stand 50, and an air supply port 52 is opened at the upper end of the discharge pipe 51. The guide members 6, 6, the air supply stand 50, and the discharge pipe 51 constitute an air supply pipe that communicates with each other. When aeration of the sewage tank 1, air is supplied by supplying air from one or both of the guide members 6, 6. The air is discharged from the mouth 52 into the water.

  An underwater aerator 53 is supported between the pair of front and rear guide members 6 and 6 so as to be movable up and down. The underwater aerator 53 includes a motor housing 11 having a built-in motor (not shown) having an output shaft protruding downward, and a substantially cylindrical casing that is connected to the lower end portion of the motor housing 11 and is opened up and down. 54, and an impeller (not shown) having a vertical axis of rotation that is rotationally driven by a motor is disposed in the casing 54, and sewage is disposed in the casing 54 by the rotation of the impeller by the motor. The water flow that is sucked in from the upper side and discharged to the lower side is generated, and the sewage in the sewage tank 1 is stirred by this water flow, or bubbles are added to the discharge water flow by the discharge of air from the air supply port 52 to I try to aerate.

  A pair of front and rear slide portions 13 and 13 are provided on the outer peripheral surface of the casing 54 so as to face each other in the diametrical direction, and the distal end portions of the slide portions 13 and 13 are externally fitted to the guide members 6 and 6. The underwater aerator 53 is moved up and down by being guided by the guide members 6 and 6, and the underwater aerator 53 is placed on the tank bottom 2 at the lowered end position. In addition, a hanging portion 14 projects from the upper portion of the motor housing 11 of the underwater aerator 53.

  On the other hand, the attachment / detachment device 24 is also provided with U-shaped slide portions 31, 31 at both front and rear ends of the frame 25, the front slide portion 31 is the front guide member 6, and the rear slide portion 31 is the rear side. The guide member 6 is slidably fitted outside the guide member 6, and the attachment / detachment device 24 is supported by the front and rear guide members 6, 6 and moves up and down. Since the frame 25 is thus supported by the guide members 6 and 6 on both the front and rear sides, the balance weight 41 is not provided on the frame 25 in this embodiment.

  One eyebolt 27 is attached to the upper surface of the frame main body 26 at the front and rear center positions, and the lower end of the winding chain 20 of the winding machine 19 is connected to the eyebolt 27. Other configurations are the same as those of the first embodiment.

  Therefore, in this embodiment, when the underwater aerator 53 in the installation position is pulled up from the water by the hoisting machine 19, the hook body 34 approaches the underwater aerator 53 by the downward movement of the attachment / detachment device 24, as shown in FIG. When the first guide portion 38 of the hook body 34 comes into contact with the hanging portion 14 of the underwater aerator 53, the hook body 34 rotates and the first engaging portion 35 automatically engages with the hanging portion 14. Thereafter, the underwater aerator 53 is pulled up by the lifting of the attaching / detaching device 24. On the other hand, when the underwater aerator 53 is installed in the water, as shown in FIG. 12, the underwater aerator 53 is lowered with the hanging portion 14 of the underwater aerator 53 engaged with the second engaging portion 36 of the hook body 34 in the attachment / detachment device 24. Then, the suspended portion 14 is automatically detached from the second engagement portion 36 at the installation position, the underwater aerator 53 is separated from the attachment / detachment device 24, and then the attachment / detachment device 24 is raised. Therefore, this embodiment can achieve the same effects as those of the first embodiment.

(Embodiment 4)
14 to 16 show a fourth embodiment, which is applied to a submersible pump. In this embodiment, the guide member 6 is composed of a pair of left and right circular guide pillars 6 a and 6 a that are erected at a short distance from each other. Fixed to the bottom 2. The connection 60 includes a discharge pipe portion 61 whose front side (right side in FIGS. 14 and 15) has a horizontal front opening and a rear side outlet which opens upward, and is integrally formed below the discharge pipe portion 61. The outlet of the discharge pipe part 61 is connected to a pipe (not shown), and an engagement cam 63 is provided on the upper part of the inlet end (front end) of the discharge pipe part 61. Further, the lower end portions of the guide pillars 6 a and 6 a are integrally coupled to the upper entrance side (front side) of the discharge pipe portion 61, and both guide pillars 6 a and 6 a are fixedly supported by a connection 60.

  An underwater pump 65 as an underwater device is supported in a cantilevered manner between the pair of left and right guide columns 6a, 6a. The submersible pump 65 includes a motor housing 11 having a built-in motor (not shown) having an output shaft protruding downward, a suction port 66a that is connected to a lower end portion of the motor housing 11 and opens downward, and a rear port. And a substantially cylindrical pump casing 66 having a discharge port 66b that opens to the side. A flange 67 is formed around the discharge port 66 b of the pump casing 66. In addition, a bracket 68 that curves in a substantially inverted U-shape is provided on the upper surface of the discharge port 66b so as to be directed upward and rearward and then downward. A stop cam 69 is formed, and when the submersible pump 65 is moved downward to the installation position near the tank bottom 2 by the slide portion 13 described later, the engagement cam 69 is engaged with the engagement cam of the discharge pipe portion 61 of the connection 60. 63 is engaged from above so that the engagement cam 63 is sandwiched between the locking cam 69 and the flange 67, so that the discharge port 66 b of the pump casing 66 and the discharge pipe portion 61 inlet of the connection 60 are connected. The connection is liquid-tight.

  An impeller (not shown) that is rotationally driven by a motor is disposed in the pump casing 66, and sewage is sucked into the pump casing 66 from the suction port 66a by the rotation of the impeller by the motor. The discharge is discharged to the outlet 66b, and this discharge flow is supplied to the discharge pipe portion 61 of the connection 60 to the inlet, and is sent to the pipe through the discharge pipe portion 61.

  A slide part 13 projects from the upper end of the rear end of the bracket 68 of the pump casing 66 so as to be positioned between the two guide pillars 6a, 6a. (Guide pillars 6a, 6a) are lifted and lowered while being cantilevered. In addition, a hanging part 14 is projected from the upper part of the motor housing 11 of the submersible pump 65.

In the attachment / detachment device 24, a slide portion 31 that is supported and slid between the guide pillars 6 a and 6 a is integrally attached to the rear end portion of the frame body 26. The slide portion 31 is a plate-like member in which semicircular guide recesses 31a and 31a into which the guide columns 6a and 6a can be fitted respectively on the left and right side edge portions, and slides between the guide columns 6a and 6a. By inserting the portion 31 with the guide column 6a fitted in each guide groove 31a, the slide portion 31 is slid between the guide columns 6a and 6a, and the frame 25 is moved up and down by the guide member 6. I support it as possible. In this embodiment, as in the first embodiment, the frame 25 of the attachment / detachment device 24 is cantilevered by one guide member 6 so as to be lifted and lowered. One eyebolt 27 is attached to the front and rear center positions on the upper surface of the frame body 26, and the lower end portion of the winding chain 20 of the winding machine 19 is connected to the eyebolt 27. Other configurations of the attachment / detachment device 24 are the same as those of the first embodiment. ,
Therefore, in this embodiment, when the submersible pump 65 at the installation position is pulled up from the water by the hoisting machine 19, the hook body 34 approaches the submersible pump 65 by the downward movement of the attachment / detachment device 24, as shown in FIG. When the first guide portion 38 of the hook body 34 comes into contact with the suspension portion 14 of the submersible pump 65, the hook body 34 rotates and the first engagement portion 35 automatically engages with the suspension portion 14. Thereafter, the submersible pump 65 is pulled up by the lifting of the attaching / detaching device 24. On the other hand, when the submersible pump 65 is installed in the water, as shown in FIG. 15, the submerged pump 65 is engaged with the second engaging portion 36 of the hook body 34 in the attaching / detaching device 24 and lowered. The suspension unit 14 is automatically detached from the second engagement portion 36 at the installation position, and the submersible pump 65 is separated from the attachment / detachment device 24. Thereafter, the attachment / detachment device 24 is raised.

  When the submersible pump 65 moves downward to the installation position near the tank bottom 2 during the installation, the locking cam 69 of the pump casing 66 is locked to the engagement cam 63 of the discharge pipe portion 61 of the connection 60 from above. The engagement cam 63 is engaged between the cam 69 and the flange 67 so that the discharge port 66b of the pump casing 66 and the discharge pipe portion 61 of the connection 60 are connected in a liquid-tight manner. . Therefore, this embodiment can achieve the same effects as those of the first embodiment.

(Other embodiments)
In the above-described embodiment, the underwater device is the underwater mixer 10, the underwater aerator 53, and the underwater pump 65, but the present invention is naturally applicable to other underwater devices.

  Moreover, although each said embodiment has demonstrated the case of the underwater apparatus used by being sunk in the sewage tank 1, if it is an underwater apparatus used in water, such as water tanks and ponds other than the sewage tank 1, this is this. The invention can be applied.

  In the present invention, when the underwater device is lifted from the water and installed in the water, the lifting device can be automatically attached to and detached from the underwater device with a simple structure, so it is extremely useful and industrially applicable. High nature.

FIG. 1 is an enlarged front view of an attachment / detachment device according to Embodiment 1 of the present invention. FIG. 2 is an enlarged side view of the attachment / detachment device. FIG. 3 is an enlarged plan view of the attachment / detachment device. FIG. 4 is a side view showing a state in which the attaching / detaching device approaches the underwater device for lifting in the lifting / lowering operation device for the underwater device according to Embodiment 1 of the present invention. FIG. 5 is a side view showing a state where the detachable device lifts the underwater device and installs it in the installation position. FIG. 6 is a plan view showing a horizontal swing state of the frame of the attachment / detachment device. FIG. 7 is a diagram illustrating the operation of the hook body when the underwater mixer is lifted. FIG. 8 is a diagram illustrating the operation of the hook body when the underwater mixer is installed. FIG. 9 is a view corresponding to FIG. FIG. 10 is a view corresponding to FIG. FIG. 11 is a view corresponding to FIG. FIG. 12 is a view corresponding to FIG. FIG. 13 is a view corresponding to FIG. FIG. 14 is a view corresponding to FIG. FIG. 15 is a view corresponding to FIG. FIG. 16 is a view corresponding to FIG.

Explanation of symbols

A Lifting operation device 1 Sewage tank 6 Guide member 10 Underwater mixer (underwater equipment)
14 Hanging part 19 Winding machine (lifting device)
24 Detachable device 25 Frame a Displacement 31 Slide portion 32 Bracket 33 Pin 34 Hook body 35 First engagement portion 36 Second engagement portion θ Phase angle 37 Balance portion 38 First guide portion 39 Guide surface b Horizontal length in the horizontal direction 41 Balance weight 43 Second guide part 53 Underwater aerator (underwater equipment)
65 Submersible pump (submersible equipment)

Claims (7)

An attachment / detachment device for attaching / detaching an underwater device that is suspended by an elevating device and moves up and down between water and water,
A frame suspended from the lifting device;
A hook body supported by the frame so as to be swingable with a horizontal rotation axis;
The hook body is suspended when the underwater device is lifted by the lifting device and is engaged with the hanging portion of the underwater device and when the underwater device is detached from the lifting device and installed in the water. A second engagement portion that is engaged with the portion, and in a no-load state, the first engagement portion is located on an extension line that connects the pivot axis of the hook body and the center of gravity of the hook body. And the second engagement portion is set to be in a no-load posture with a phase shifted in the swing direction with respect to the first engagement portion,
When the hook body is moved downward in the unloaded posture, the hook body is rotated by contact with the hanging part of the underwater device at the installation position to engage the hanging part with the first engaging part. A first guide portion that guides the underwater device to move to a no-load posture when the underwater device is moved downward by engaging the second engaging portion. A device for attaching and detaching an underwater device, characterized in that the engagement between the hanging portion and the second engaging portion is released. The underwater device attachment / detachment device according to claim 1,
A device for attaching and detaching an underwater device, comprising a balance weight for allowing the frame to be suspended in a horizontal state in a load-free posture of the hook body. In the attachment or detachment apparatus of the underwater apparatus of Claim 1 or 2,
A second guide portion that guides the frame so as to abut against the suspension portion of the underwater device when the hook body descends in a no-load posture and to abut the suspension portion against the first guide portion. A device for attaching and detaching an underwater device, wherein the device is provided so as to face a portion. The underwater device attachment / detachment device according to claim 1,
The underwater device attaching / detaching device, wherein the frame is supported by a guide member that guides the underwater device to be raised and lowered. In the attachment or detachment apparatus of the underwater apparatus of Claim 4,
The frame is cantilevered so as to be movable up and down by one guide member,
A device for attaching and detaching an underwater device, wherein a horizontal displacement amount of the hook body around the guide member is smaller than a horizontal length of the first guide portion. In the attachment or detachment apparatus of the underwater apparatus of any one of Claims 1-5,
A submersible device attaching / detaching device, wherein the submersible device is a submersible pump, a submersible aerator, or a submersible mixer.   An ascending / descending operation device for an underwater device, comprising the underwater device attachment / detachment device according to any one of claims 1 to 6.

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