Conveyance device

Abstract

To effectively suppress diffusion of acid mists or fumes even with a simple structure.SOLUTION: A hood 6 having an internal space Ain capable of storing a part of a coiled wire 90 including a hook 4 is fixed to a crane girder 2a. Since the hood 6 can be moved integrally with a crane body, there is no need to provide an opening for passing a crane body 2 in the hood 6. Thus, leakage of acid mists or fumes out of the hood 6 can be satisfactorily prevented, and diffusion of the acid mists or fumes can be effectively suppressed. Since it is only necessary to install the hood 6 in the crane body 2, a structure is simple.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a conveying device that travels along a traveling rail disposed above a pickling treatment tank and conveys a coiled wire rod to the pickling treatment tank.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2000-96275 (Patent Document 1) describes a processing facility that conveys a coiled wire rod suspended from a hook of a conveying device such as a crane above a pickling tank in which acid liquid is stored, and immerses the coiled wire rod in the acid liquid while it is suspended from the hook to remove scale generated on the surface of the coiled wire rod.

[0003] In this processing facility, a hood fixed to the pickling tank or the building itself covers the space above the pickling tank, and acid mist and fumes generated during pickling treatment are sucked and removed through a duct, thereby suppressing the diffusion of acid mist and fumes in the building.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the processing facility described in the above-mentioned publication, since the hood is fixed to the pickling tank or the building itself, it is necessary to provide an opening through which a conveying device such as a crane passes in the hood itself. Therefore, there is still room for improvement in terms of preventing the diffusion of acid mist and fumes. Further, when a hood is installed later as an environmental measure in a processing facility including a pickling tank already installed in a building, it is necessary to install the hood in a limited space, which not only makes the installation work difficult, but also the installation of the hood itself may be difficult.

[0006] The present invention has been made in view of the above, and an object thereof is to provide a technique capable of effectively suppressing the diffusion of acid mist and fumes while having a simple configuration.

Means for Solving the Problems

[0007] The conveying device of the present invention has adopted the following means in order to achieve the above object.

[0008] According to a preferred form of the conveying device according to the present invention, a conveying device is configured to travel along a traveling rail disposed above the pickling treatment tank and convey the coiled wire rod to the pickling treatment tank. The conveying device includes a hook, a crane body, and a hood. The hook can suspend the coiled wire rod. The crane body suspends and supports the hook in a vertically movable manner. Further, the crane body is disposed on the traveling rail so as to be able to travel on the traveling rail. And the hood has an internal space having a size that includes the projection of the coiled wire rod on the virtual projection plane when the conveying device is viewed from one side in the vertical direction. Further, the hood is supported by the crane body so that at least a part thereof is disposed between the hook and the crane body. Here, the "crane body" in the present invention typically corresponds to a crane girder and a saddle. Also, the "at least a part" in the present invention typically corresponds to the roof (ceiling) portion of the hood.

[0009] According to the present invention, since the hood is supported by the crane body, the hood can move integrally with the crane body. As a result, there is no need to provide an opening for passing the crane body through the hood, so that it is possible to preferably prevent acid mist and fumes generated due to pickling treatment of the coiled wire from leaking outside the hood. As a result, the diffusion of acid mist and fumes can be effectively suppressed. In addition, since the hood is only installed on the crane body, a structure for effectively suppressing the diffusion of acid mist and fumes can be easily realized. In addition, when the coiled wire is suspended from the hook, the hood does not get in the way, so the workability does not decrease.

[0010] According to a further aspect of the conveying device according to the present invention, the internal space has a size capable of accommodating at least the hook.

[0011] According to this aspect, since acid mist and fumes generated due to pickling treatment of the coiled wire can be accommodated in the internal space, the diffusion of acid mist and fumes can be more effectively suppressed.

[0012] According to a further aspect of the conveying device according to the present invention, the internal space further includes a suction fan capable of sucking air. And the suction fan is integrated with the hood.

[0013] According to this aspect, since the acid mist and fumes accommodated in the internal space can be sucked, a situation where the acid mist and fumes cannot be completely accommodated in the internal space can be avoided.

[0014] According to a further aspect of the conveying device according to the present invention in an aspect provided with a suction part, the suction part further includes a duct having an opening at a position facing the suction fan, and a processing part connected to the duct.

[0015] According to this embodiment, acid mist and fumes sucked by the suction fan can be fed to the treatment unit through the duct. Thereby, the acid mist and fumes can be discharged in a harmless state by the treatment unit.

[0016] According to a further aspect of the conveying device according to the present invention in an aspect provided with a suction unit, it further includes a supply unit capable of supplying air to the internal space. The supply unit has a supply fan. And the supply fan is integrated with the hood.

[0017] According to this embodiment, the exhaust of the internal space can be performed more efficiently.

[0018] According to a further aspect of the conveying device according to the present invention in an aspect provided with a suction unit and a supply unit, it further includes a sensor capable of detecting that the conveying device has reached above the pickling treatment tank, and a control unit capable of controlling the suction fan and / or the supply fan. And when the sensor detects that the conveying device has reached above the pickling treatment tank, the control unit controls at least the suction fan so that at least the suction fan operates.

[0019] According to this embodiment, since at least the suction fan operates immediately before pickling the coiled wire, the diffusion of acid mist and fumes generated due to pickling the coiled wire can be effectively suppressed.

[0020] According to a further aspect of the conveying device according to the present invention in an aspect provided with a control unit, the control unit controls the suction fan and the supply fan so that the air discharge amount by the suction fan is equal to or greater than the air supply amount by the supply fan.

[0021] According to this embodiment, the exhaust of the internal space can be performed even more efficiently.

[0022] According to a further aspect of the conveying device according to the present invention, the crane body has a guide unit for guiding the lifting and lowering of the hook.

[0023] According to this embodiment, since the lifting of the hook can be guided, when the hook is lifted or lowered, especially when the hook is lifted, the hook in a state where the coiled wire is suspended can be smoothly accommodated in the internal space of the hood. Further, when the crane body travels on the traveling rail, the sway (runaway) of the hook can be suppressed.

Effects of the Invention

[0024] According to the present invention, although the configuration is simple, the diffusion of acid mist and fumes can be effectively suppressed.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0026] Next, the best mode for carrying out the present invention will be described using examples.

Examples

[0027] As shown in FIG. 1, the transfer device 1 according to the embodiment of the present invention is configured as a ceiling crane that travels on a pair of traveling rails 80, 80 disposed above a plurality of processing facilities such as a pickling treatment tank 70, and conveys the coiled wire 90 above the pickling treatment tank 70. The transfer device 1 The conveying device 1 includes a crane body 2, a hook 4 supported in a suspended manner by the crane body 2, a hood 6 disposed between the crane body 2 and the hook 4 so as to cover the hook 4, and a control device 50 that controls the entire conveying device 1. A pair of traveling rails 80, 80 are installed on the upper portions of a plurality of pairs of columns 82, 82 erected in a building where the processing equipment is disposed. In the present embodiment, the pair of traveling rails 80, 80 extend in a direction perpendicular to the plane of FIG. 1, and the conveying device 1 travels in a direction perpendicular to the plane of FIG. 1. Further, a gantry 72 is disposed in the vicinity of the pickling treatment tank 70 around the pickling treatment tank 70, and the hook 4 lowered by the gantry 72 is supported. In other words, it can be said that the gantry 72 functions as a mounting table for the hook 4. In the present embodiment, the "crane" is defined as a mechanical device that uses power to lift a load and horizontally transport it, and preferably includes a hoist that can move horizontally.

[0028] As shown in FIG. 1, the crane body 2 includes a long crane girder 2a spanned between a pair of traveling rails 80, 80, saddles 2b, 2b integrally formed with the crane girder 2a at both longitudinal ends of the crane girder 2a, a winding device 2c disposed on the crane girder 2a, and a pair of guide rods 2d, 2d. The saddles 2b, 2b have wheels (not shown) that engage with the traveling rails 80, 80. By rolling the wheels on the traveling rails 80, 80, the crane body 2 can travel on the traveling rails 80, 80. The winding device 2c includes a winding motor M (see FIG. 2), a drum Dr (see FIG. 2) that winds the winding wire W, and a lifting tool Lg (see FIGS. 1 and 2) integrated with the tip of the winding wire W. The lifting tool Lg engages with a support beam 4a of the hook 4 described later. Thereby, the crane body 2 raises and lowers the hook 4 in a state of supporting the hook 4 in a suspended manner. The pair of guide rods 2d, 2d are vertically provided downward from the lower end surface of the crane girder 2a. The guide rods 2d, 2d guide the raising and lowering of the hook 4. The pair of guide rods 2d, 2d is an example of an implementation configuration corresponding to the "guide portion" in the present invention.

[0029] As shown in FIGS. 1 and 2, the hook 4 has a long support beam 4a and a substantially hook-shaped hanging portion 4b integrally provided on the support beam 4a, and a coiled wire 90 is suspended from the hanging portion 4b. The support beam 4a has a pair of guide holes (not shown) through which the guide rods 2d, 2d can be inserted at both longitudinal ends. The hanging portion 4b has a protruding portion 4c that protrudes upward (upward in FIG. 1) at the tip in the extending direction (front side, right side in FIG. 1), and is configured such that the suspended coiled wire 90 does not fall out from the tip of the hanging portion 4b.

[0030] As shown in FIGS. 1 and 2, the hood 6 is supported (fixed) by the crane gantry 2a with at least a part (roof part or ceiling part) disposed between the hook 4 and the crane gantry 2a. Thereby, when the crane body 2 travels on the traveling rails 80, 80, the hood 6 can move integrally with the crane body 2. The hood 6 has an internal space Ain capable of accommodating the hook 4 and a part of the coiled wire 90 suspended from the hook 4. As shown in FIG. 3, the internal space Ain has a size that can include the coiled wire 90 inside the projection area on the virtual projection plane when the conveying device 1 is viewed from above in the vertical direction. Note that it is desirable that the internal space Ain has a size that can include the pickling treatment tank 70 inside the projection area on the virtual projection plane when the conveying device 1 is viewed from above in the vertical direction. Further, as shown in FIG. 1, the hood 6 has an exhaust fan 6a and a blower 6b. The exhaust fan 6a sends out the air in the internal space Ain (see FIGS. 2 and 3) of the hood 6 to the outside of the hood 6. The air discharged to the outside of the hood 6 by the exhaust fan 6a is sent to the scrubber 86 through the exhaust duct 84 as shown in FIG. 1. Note that the inlet opening of the exhaust duct 84 is disposed at a position facing the exhaust fan 6a. The blower 6b is disposed at substantially the same height position as the height of the support beam 4a (specifically, the height of the lower surface of the support beam 4a) when the hook 4 rises to the ascending end (the position where the hook 4 suspending the coiled wire 90 by the crane body 2 is movable), and supplies air into the internal space Ain. Thus, since the hood 6 has the exhaust fan 6a and the blower 6b, a certain air flow from the blower 6b to the exhaust fan 6a can be formed in the internal space Ain (so-called push-pull induction), and the internal space Ain can be induced well. Further, the drying of the hook 4, which is wetted or has water droplets attached thereto due to acid mist, fumes, etc., particularly the support beam 4a, can be realized by the air from the blower 6b. Note that the hood 6 has an opening 6c for inserting the hoisting wire W through the roof top (see FIG. 2). The exhaust fan 6a corresponds to the "suction fan" in the present invention, and the blower 6b is an example of an implementation configuration corresponding to the "supply fan" in the present invention.In addition, the exhaust fan 6a, the exhaust duct 84, and the scrubber 86 are an example of an implementation configuration corresponding to the "suction unit" in the present invention.

[0031] The control device 50 is configured as a microprocessor centered on a CPU, and in addition to the CPU, it includes a ROM that stores a processing program, a RAM that temporarily stores data, and an input / output port (not shown). To the control device 50, a reach signal from a sensor 52 capable of detecting that the crane body 2 has reached the pickling treatment position (the position above the pickling treatment tank 70), the rotation speed from a rotation speed sensor (not shown) that detects the rotation speed of the fans of the exhaust fan 6a and the blower 6b, the lifting position from a sensor (not shown) capable of detecting the position of the hook 4, etc. are input via an input port (not shown). Further, from the control device 50, a control signal to the crane body 2, a control signal to the hoisting motor M, a control signal to the exhaust fan 6a and the blower 6b, etc. are output via an output port (not shown). The control device 50 is an example of an implementation configuration corresponding to the "control unit" in the present invention.

[0032] Next, the operation of the conveying device 1 configured in this way, particularly the operation when pickling the coiled wire 90, will be described. When the pickling treatment program for the coiled wire 90 is executed, the CPU of the control device 50 first drives and controls the crane body 2 so that the hook 4 suspending the coiled wire 90 reaches above the pickling treatment tank 70, and determines whether a reach signal from the sensor 52 is received. Here, since a pair of guide holes (not shown) of the support beam 4a are inserted with guide rods 2d, 2d, it is possible to preferably suppress the swinging movement of the hook 4 while the hook 4 suspending the coiled wire 90 reaches above the pickling treatment tank 70. Thereby, it is possible to prevent the hook 4 and the coiled wire 90 from contacting the hood 6.

[0033] Subsequently, when the arrival signal from the sensor 52 is received, that is, when the coiled wire 90 reaches above the pickling treatment tank 70 by the suspension hook 4, the exhaust fan 6a is operated, and the hoisting motor M is driven and controlled so that the hook 4 descends to immerse the coiled wire 90 in the acid solution in the pickling treatment tank 70. Since the descent of the hook 4 is guided by the guide rods 2d, 2d, the hook 4 can be smoothly and surely lowered into the pickling treatment tank 70.

[0034] Then, as shown in FIGS. 4 and 5, when the hook 4 is lowered until the coiled wire 90 is immersed in the acid solution in the pickling treatment tank 70, the CPU of the control device 50 stops the hoisting motor M. In this way, by immersing the coiled wire 90 in the acid solution in the pickling treatment tank 70, scale and the like generated on the surface of the coiled wire 90 are removed. At this time, due to the pickling of the coiled wire 90, acid mist and fumes are generated. However, since the space above the pickling treatment tank 70 is covered by the hood 6, the generated acid mist and fumes can be accommodated in the internal space Ain of the hood 6. Here, since the exhaust fan 6a is operating, the acid mist and fumes accommodated in the internal space Ain can be sent outside the hood 6, specifically, to the scrubber 86 via the exhaust duct 84. Thereby, it is possible to effectively prevent the acid mist and fumes from leaking outside the hood 6. Also, when the hook 4 suspending the coiled wire 90 reaches above the pickling treatment tank 70, that is, from immediately before pickling the coiled wire 90, the exhaust fan 6a is operated, so that the diffusion of the acid mist and fumes outside the hood 6 can be effectively suppressed. Since the hood 6 only has an opening 6c for inserting the wire W, compared with the conventional structure having an opening for passing the crane body 2, the leakage of the acid mist and fumes outside the hood 6 can be effectively suppressed. Also, since the hood 6 is only installed on the crane body 2, the suppression of the diffusion of the acid mist and fumes can be realized with a simple configuration.

[0035] When the pickling process of the coiled wire 90 is completed in this way, the CPU of the control device 50 drives and controls the hoisting motor M so that the hook 4 rises, and operates the blower 6b. Here, it is desirable to control the exhaust fan 6a and the blower 6b so that the rotational speed of the fan of the exhaust fan 6a is faster than the rotational speed of the fan of the blower 6b, that is, so that the amount of exhaust air by the exhaust fan 6a is larger than the amount of supply air by the blower 6b. By operating the blower 6b in this way, an air flow from the blower 6b side to the exhaust fan 6a side is formed in the internal space Ain, so that the acid mist and fumes contained in the internal space Ain can be effectively sent to the scrubber 86 via the exhaust duct 84. Thereby, it is possible to better prevent the acid mist and fumes from leaking out of the hood 6. In addition, in order to control the exhaust fan 6a and the blower 6b so that the amount of exhaust air by the exhaust fan 6a is larger than the amount of supply air by the blower 6b, so-called push-pull ventilation can be realized well. Also, since the hook 4, particularly the support beam 4a, which is wet or has water droplets attached due to acid mist, fumes, etc., can be dried by the air sent from the blower 6b, rust and corrosion of the hook 4 including the support beam 4a can be prevented well.

[0036] Note that since the ascent of the hook 4 is guided by the guide rods 2d, 2d, the hook 4 can be smoothly and surely raised out of the pickling tank 70. Then, when the hook 4 has risen to the rising end (the position where the hook 4 that has suspended the coiled wire 90 by the crane body 2 can be moved), the CPU of the control device 50 stops the hoisting motor M and stops the exhaust fan 6a and the blower 6b. Finally, the CPU of the control device 50 drives and controls the crane body 2 to move the coiled wire 90 to the next processing step and ends the pickling process.

[0037] As described above, according to the conveying device 1 according to the embodiment of the present invention, the hood 6 having an internal space Ain capable of accommodating the hook 4 and a part of the coiled wire 90 suspended from the hook 4 is fixed to the crane girder 2a in a state where its roof portion (ceiling portion) is disposed between the hook 4 and the crane girder 2a. Therefore, the hood 6 can be moved integrally with the crane body. As a result, since there is no need to provide an opening for passing the crane body 2 through the hood 6, it is possible to satisfactorily prevent acid mist and fumes generated due to pickling the coiled wire 90 from leaking outside the hood 6. As a result, the diffusion of acid mist and fumes can be effectively suppressed. Further, since the hood 6 is only installed on the crane body 2, a structure for effectively suppressing the diffusion of acid mist and fumes can be easily realized. In addition, when the coiled wire 90 is suspended from the hook 4, the hood 6 does not get in the way, so the workability does not deteriorate.

[0038] Further, according to the conveying device 1 according to the embodiment of the present invention, since the hood 6 has an exhaust fan 6a and a blower 6b, the acid mist and fumes accommodated in the internal space Ain can be satisfactorily discharged outside the hood 6. Note that the exhaust fan 6a and the blower 6b are operated so that the rotational speed of the fan of the exhaust fan 6a is higher than the rotational speed of the fan of the blower 6b, that is, the amount of exhaust air by the exhaust fan 6a is larger than the amount of supply air by the blower 6b. Therefore, the exhaust of the internal space Ain can be performed more efficiently. Further, the acid mist and fumes discharged by the exhaust fan 6a are sent to the scrubber 86 via the exhaust duct 84, so that they can be discharged in a harmless state.

[0039] Furthermore, according to the conveying device 1 according to the embodiment of the present invention, since the hook 4 is guided by the guide rods 2d, 2d to move up and down, when the hook 4 moves up and down, particularly when the hook 4 is lifted, the hook 4 with the coiled wire 90 suspended therefrom can be smoothly accommodated in the internal space Ain of the hood 6. In addition, when the crane body 2 travels on the traveling rails 80, 80, the guide rods 2d, 2d can suppress the sway (runaway) of the hook 4.

[0040] In this embodiment, the exhaust fan 6a and the blower 6b are configured to operate such that the amount of discharged air by the exhaust fan 6a is larger than the amount of supplied air by the blower 6b, but it is not limited thereto. The exhaust fan 6a and the blower 6b may be configured to operate such that the amount of discharged air by the exhaust fan 6a is the same as the amount of supplied air by the blower 6b.

[0041] In this embodiment, a configuration having a pair of guide rods 2d, 2d is adopted, but it is not limited thereto. For example, a configuration having three or more guide rods 2d may be used, or a configuration not having the guide rod 2d may be used.

[0042] In this embodiment, the internal space Ain is sized to accommodate the hook 4 and a part of the coiled wire 90 suspended from the hook 4, but it is not limited thereto. The internal space Ain may be sized to accommodate the entire hook 4 and the coiled wire 90 suspended from the hook 4. Alternatively, the internal space Ain may be sized to accommodate only a part of the hook 4.

[0043] In this embodiment, a configuration having the exhaust fan 6a and the blower 6b is adopted, but it is not limited thereto. For example, a configuration having only the exhaust fan 6a may be used, or a configuration not having both the exhaust fan 6a and the blower 6b may be used.

[0044] In this embodiment, when the sensor 52 detects that the conveying device 1 has reached above the pickling tank 70, the exhaust fan 6a is operated, but it is not limited thereto. For example, when the coiled wire 90 is immersed in the pickling tank 70, the exhaust fan 6a may be operated, or when the hook 4 is descending, the exhaust fan 6a may be operated.

[0045] In this embodiment, a configuration is adopted such that the exhaust fan 6a operates before the blower 6b, but it is not limited thereto. For example, a configuration may be adopted such that the exhaust fan 6a and the blower 6b operate simultaneously.

[0046] This embodiment shows an example of a mode for implementing the present invention. Therefore, the present invention is not limited to the configuration of this embodiment.

[0047] <Appendix> In view of the gist of the above invention, the conveying device according to the present invention can be configured in the following aspects. (Aspect 1) "A conveying device that travels along a traveling rail arranged above the pickling treatment tank and conveys the coiled wire to the pickling treatment tank, a hook capable of suspending the coiled wire, a crane body that is arranged on the traveling rail so as to be able to lift and support the hook up and down and travel on the traveling rail, a hood supported by the crane body so as to have an internal space sized to include the projection of the coiled wire on a virtual projection plane when the conveying device is viewed from one side in the vertical direction, and at least a part of which is arranged between the hook and the crane body, and comprising a conveying device." (Aspect 2) "The internal space has a size capable of accommodating at least the hook The conveying device according to Aspect 1." (Aspect 3) "Further comprising a suction part capable of sucking the air in the internal space, the suction part has a suction fan, the suction fan is integrated with the hood The conveying device according to Aspect 1 or 2." (Aspect 4) "The suction part further comprises a duct having an opening at a position facing the suction fan, and a processing part connected to the duct The conveying device according to Aspect 3." (Aspect 5) "Further comprising a supply part capable of supplying air to the internal space, the supply part has a supply fan, The supply fan is integrated with the hood. The conveying device according to the above-described Aspect 3 or 4. (Aspect 6) “A sensor capable of detecting that the conveying device has reached above the pickling treatment tank, and a control unit capable of controlling the suction fan and / or the supply fan, further comprising: when the sensor detects that the conveying device has reached above the pickling treatment tank, the control unit controls at least the suction fan so that at least the suction fan operates. The conveying device according to the above-described Aspect 5. (Aspect 7) “The control unit controls the suction fan and the supply fan so that the air discharge amount by the suction fan is equal to or greater than the air supply amount by the supply fan. The conveying device according to the above-described Aspect 6. (Aspect 8) “The suspension support portion has a guide portion for guiding the lifting and lowering of the hook. The conveying device according to any one of the above-described Aspects 1 to 7.

Explanation of Reference Numerals

[0048] 1 Conveying device 1 (conveying device) 2 Crane body (crane body) 2a Crane girder 2b Saddle 2c Hoisting device 2d Guide rod (guide portion) 4 Hook (hook) 4a Support beam 4b Hanging portion 4c Protrusion 6 Hood (hood) 6a Exhaust fan (suction portion, suction fan) 6b Blower (supply fan) 6c Opening 50 Control device (control unit) 52 Sensor (sensor) 70 Pickling treatment tank (Pickling treatment tank) 72 Stand 80 Traveling rail (Traveling rail) 82 Column 84 Exhaust duct (Suction part, Duct) 86 Scrubber (Suction part, Treatment part) 90 Coiled wire (Coiled wire) M Hoisting motor W Hoisting wire Lg Sling Dr Drum Ain Internal space (Internal space)

Claims

1. A conveying device that travels along a traveling rail disposed above a pickling treatment tank and conveys a coiled wire rod to the pickling treatment tank, a hook capable of suspending the coiled wire rod, a crane body that suspends and supports the hook so as to be movable up and down and is disposed on the traveling rail so as to be movable along the traveling rail, a hood having an internal space sized to include the projection of the coiled wire rod on a virtual projection plane when the conveying device is viewed from one side in the vertical direction, and at least a part of which is supported by the crane body so as to be disposed between the hook and the crane body, comprising a conveying device.

2. The internal space has a size capable of accommodating at least the hook. The conveying device according to Claim 1.

3. The conveying device further comprises a suction part capable of sucking air in the internal space, the suction part has a suction fan, and the suction fan is integrated with the hood. The conveying device according to Claim 1 or 2.

4. The suction part further comprises a duct having an opening at a position facing the suction fan, and a processing part connected to the duct. The conveying device according to Claim 3.

5. The conveying device further comprises a supply part capable of supplying air to the internal space, the supply part has a supply fan, and the supply fan is integrated with the hood. The conveying device according to Claim 3.

6. a sensor capable of detecting that the conveying device has reached above the pickling treatment tank, a control part capable of controlling the suction fan and / or the supply fan, further comprising when the sensor detects that the conveying device has reached above the pickling treatment tank, the control part controls at least the suction fan so that at least the suction fan operates. The conveying device according to Claim 5.

7. The control part controls the suction fan and the supply fan so that the discharge amount of the air by the suction fan is equal to or greater than the supply amount of the air by the supply fan. The conveying device according to Claim 6.

8. The crane body has a guide part for guiding the lifting and lowering of the hook. The conveying device according to Claim 1 or 2.

Images