JP5867697B2 - Steel plate hanger - Google Patents

Description

  The present invention relates to a hanging tool used when lifting a steel sheet vertically, and more particularly to a hanging tool suitable for safely shifting a horizontally placed steel sheet to a vertically suspended state.

  In order to perform heat treatment such as quenching on a steel plate, it is necessary to rapidly cool the steel plate by immersing it in a vertical water tank after heating it to about 900 ° C. in a heating furnace. In order to put the steel plate heated to this high temperature into the water tank, conventionally, by forming notches on both sides of one end in the longitudinal direction of the steel plate, a hanging portion protruding laterally on both sides of the end is formed. However, a heat-resistant hanging tool such as a chain is hooked on the suspended portion of the horizontally placed steel plate and lifted by an overhead crane to shift the steel plate to a vertically suspended state.

JP 2007-217175 A JP 2004-090061 A JP 2004-017074 A

  However, in the conventional lifting method using a chain, since the chain is hooked on a suspended portion of a high-temperature steel plate, a person must approach the steel plate and manually operate the chain, and there is a risk of burns. Moreover, the weight of the chain for hanging the heavy steel plate may be 100 kg or more, and it has been forced to perform considerable heavy work to hang this manually. Furthermore, the steel plate lifted by the chain is likely to cause a load swing when shifted to the vertically suspended state, and there is a risk of falling off the chain. Even when a C hook is used instead of a chain, the same problem may occur.

  On the other hand, as conventional hangers, hangers for lifting long objects (Patent Document 1), suspenders for reversing sand molds (Patent Document 2), and suspenders for continuous casting dummy bar heads (Patent Document) 3) is also known, but none of these are suitable for safely shifting a horizontally placed steel plate to a vertically suspended state.

  Therefore, an object of the present invention is to provide a hanging tool suitable for safely shifting a horizontally placed steel plate to a vertically suspended state.

In order to solve the above problems, the present invention provides a hanging tool used when vertically lifting a steel plate,
A suspended beam suspended horizontally by a crane hook and extending horizontally;
Two arms supported horizontally by the suspension beam;
An arm moving mechanism that horizontally moves the two arms in opposite directions to open and close their distance;
With
The two arms have suspension holes that respectively engage with suspension portions formed on both sides of one end portion in the longitudinal direction of the steel plate.

  In such a steel sheet hanger according to the present invention, two arms supported by a hanging beam suspended horizontally by a crane so as to be horizontally movable are moved in a direction approaching each other by an arm moving mechanism. The distance between the arms until the suspension holes provided in the two arms are inserted from the inside on both sides of the longitudinal end of the horizontally placed steel plate and engage with the suspension portions respectively. When the suspension beam is raised by a crane in this state, the longitudinal ends of the steel plate are lifted while the suspension portions on both sides of the longitudinal end of the steel plate rotate within the suspension holes of the two arms. Therefore, the steel plate is shifted to a vertically suspended state, and heat treatment of the steel plate by immersion in a vertical water tank becomes possible. At that time, since the two arms are maintained in a state in which the interval is closed by the arm moving mechanism, the suspension portions on both sides of the longitudinal ends of the steel plates do not come out of the suspension holes of the two arms.

  And when the heat treatment is completed, after returning the steel plate to the horizontal position in the reverse procedure to the above, by moving the two arms in the direction away from each other by the arm moving mechanism, and opening the interval between those arms, The suspension holes provided in the two arms are separated from the suspension portions on both sides of one end portion in the longitudinal direction of the horizontally placed steel plate.

  Therefore, according to the steel plate hanging tool of the present invention, the arm moving mechanism can be remotely operated, so that the steel plate can be lifted without approaching by a person, so that the risk of burns to the operator can be eliminated. When the steel plate is raised, the suspension part of the steel plate rotates in the suspension hole of the arm, so that there is no risk of swinging of the steel plate. It is possible to shift to a vertically suspended state.

Moreover , in this invention, the shape of the said suspension hole is circular . If the arm's suspension hole is square, when the steel plate is thick, etc., when the steel plate is raised, the suspension part turns and catches on the corner part of the suspension hole, and it does not rotate smoothly and can not be caused To do. However, in the present invention, since the suspension hole of the arm is circular , the suspension part smoothly rotates in the suspension hole even when the steel plate is thick. Since the surrounding arm dimensions can be minimized evenly, the notch for forming the suspension on both sides of the longitudinal end of the steel sheet can be made smaller, and material loss due to the notch is reduced. be able to.

In the present invention, a radial bearing is provided in the suspension hole . Since the radial bearing is provided in the suspension hole of the arm, even if the steel plate is thick, the suspension part always rotates smoothly by the radial bearing in the suspension hole, so that the steel plate can be raised more easily. In addition, wear and deformation of the inner peripheral surface of the suspension hole due to the rotation of the suspension portion can be prevented.

(A), (b) is the top view and front view which show one Embodiment of the hanging tool for steel plates of this invention. It is a side view which shows the hanging tool for steel plates of the said embodiment. It is sectional drawing which expands and shows the peripheral part of the suspension hole of the arm of the hanging tool for steel plates of the said embodiment. It is explanatory drawing which shows the state which lifted the steel plate with the hanging tool for steel plates of the said embodiment, and was made to transfer to a vertically suspended state.

  1 (a) and 1 (b) are a plan view and a front view showing an embodiment of a steel sheet hanger according to the present invention, and FIG. 2 is a side view showing a steel sheet hanger according to the above embodiment. In the figure, reference numeral 1 denotes an unillustrated overhead crane hook.

  The steel plate suspension according to this embodiment includes a suspension beam 2 that is suspended by two hooks 1 of the above-described overhead crane and extends horizontally, and a central portion of the suspension beam 2 that is perpendicular to the suspension beam 2 and horizontally. A guide beam 3 fixedly supported so as to extend, two arms 4 supported so as to be horizontally movable along the guide beam 3, and the two arms 4 are moved in opposite directions to each other. And an arm moving mechanism 5 for opening and closing the interval.

  Here, the suspension beam 2 has two hook pins 2a respectively engaged with the two hooks 1 of the overhead crane so as to be movable in the direction in which the suspension beam 2 extends. As a result, the lever pin 2b can be engaged with the hook pin 2a and horizontally moved manually to move the hook pin 2a, thereby appropriately adjusting the distance between the two hook pins 2a.

  The guide beam 3 has two U-shaped guide rails 3a on both sides thereof, while the two arms 4 are mainly formed of thick plates, and the guide beams 3 are respectively formed on the upper ends thereof. Two wheels 4a are provided on both sides with 3 interposed therebetween. By fitting these wheels 4a into the guide rail 3a, the two arms 4 are respectively supported by the guide beam 3, and when these wheels 4a run in the guide rail 3a, the two arms 4 are Each can move horizontally along the guide beam 3 between an outer position indicated by a solid line in the drawing and an inner position indicated by a virtual line in the drawing.

The arm moving mechanism 5 includes two racks 5 a provided along the guide beam 3 on the upper end surfaces of the two arms 4, and two pinions 5 b meshing with the two racks 5 a of the two arms 4. Have two drive shafts 5c at both ends, and two motors 5d with speed reducers that respectively drive the drive shafts 5c in a chain. The two motors 5d respectively drive the drive shaft 5c in a chain to rotate the pinions 5b at both ends, and these pinions 5b move the rack 5a along the guide beam 3, whereby the two arms 4 become guide rails. Under the guidance of 3a, they move horizontally in opposite directions.

Each of the two arms 4 has a circular suspension hole 4b at its lower portion, and FIG. 3 is an enlarged cross-sectional view of the periphery of the suspension hole 4b. As shown in the figure, the suspension hole 4b is defined by two high-strength rings 4d fixed to each other so as to sandwich the thick plate inside a through hole 4c formed in the thick plate. 2, the suspension hole 4b is formed by providing a U-shaped notch C on both sides of one end in the longitudinal direction of the steel sheet S (the upper end in the figure), as shown in FIG. It has an inner diameter that can be engaged with H. Further, the two high-strength rings 4d serve to prevent wear or deformation of the inner peripheral surface of the suspension hole 4b due to the rotation of the suspension portion H when the steel plate S is raised. A radial bearing (not shown) is provided in the suspension hole 4b.

  When the steel plate S is lifted by the steel plate hanger of this embodiment, first, the hanger is moved by an overhead crane, and both ends of one end in the longitudinal direction of the steel plate S heated to a high temperature are placed horizontally. The two arms 4 are positioned close to both outer sides of the side suspension portion H. Next, the arm moving mechanism 5 is remotely operated, for example, wirelessly to move the two arms 4 in the closing direction, which is the approaching direction of each other, and the steel sheet S is suspended from the inside into the circular hanging hole 4b of the arm 4. Insert part H. When the suspended portion H is accommodated in the suspension hole 4b of the arm 4, the steel plate S is lifted together with the suspension tool by the overhead crane.

  Thus, the longitudinal ends of the steel sheet S are lifted while the hanging portions H on both sides of the longitudinal ends of the steel sheet S rotate in the suspension holes 4b of the two arms 4, and the steel sheet S is lifted. It shifts to a vertically suspended state. When the steel plate S is in a vertical vertically suspended state, as shown in FIG. 4, the steel plate S is lifted together with the lifting tool by the overhead crane and moved onto the water tank T, and then the steel plate S is lowered together with the lifting tool by the overhead crane. Then, the steel sheet S is immersed in the water tank T to perform a quenching process. At that time, the two arms 4 are maintained in a state in which the distance between the two arms 4 is closed by the friction inside the arm moving mechanism 5 or the brake mechanism added thereto. Does not come out of the suspension holes 4b of the two arms 4.

  And after completion | finish of hardening process, after returning the steel plate S to a horizontal placing state in the reverse procedure to the above, the two arms 4 are moved away from each other by the arm moving mechanism 5, and the arms 4 By opening the interval, the suspension holes 4b provided in the two arms 4 are detached from the suspension portions H on both sides of one end portion in the longitudinal direction of the horizontally placed steel sheet S. Thus, a series of operations is completed.

  Therefore, according to the steel plate suspension of this embodiment, the arm moving mechanism 5 can be remotely operated to lift the steel plate S without approaching a person, thereby eliminating the risk of burns to the operator. Further, when the steel plate S is raised, the suspension portion H of the steel plate S rotates in the suspension hole 4b of the arm 4, so that no load swing occurs, so that the steel plate S is detached from the suspension tool. There is no danger of falling, and the steel sheet S can be safely transferred to the vertically suspended state.

  Moreover, according to the steel plate suspension of this embodiment, since the shape of the suspension hole 4b is circular, not only when the steel plate S is thin as shown by the three-dot chain line in FIG. 2, but also in FIG. Even when it is thick as indicated by the dotted line, the suspension part H smoothly rotates in the suspension hole 4b, so that the steel plate S can be easily raised, and the arm dimensions around the suspension hole 4b are equalized. Therefore, it is possible to reduce the notch portion C for forming the hanging portion H on both sides of the longitudinal end portion of the steel sheet S, and to reduce the material loss due to the notch portion C. it can.

Although the present invention has been described based on the illustrated examples, the present invention is not limited to the above-described examples, and can be appropriately changed within the scope of the claims. For example, in the above-described example, the hanging hole 4b Although a radial bearing is provided in addition to the ring 4d that defines the above , a radial bearing may be provided instead of the ring 4d. By providing radial bearings , even if the steel plate is thick, etc., since the suspension part always rotates smoothly in the suspension hole by the radial bearing, the steel plate can be raised more easily, and the suspension part can be rotated. Accordingly, since the inner race of the bearing rotates, wear and deformation of the inner peripheral surface of the hanging hole can be prevented.

  Thus, according to the steel plate suspension of the present invention, by remotely operating the arm moving mechanism, the steel plate can be lifted without approaching a person, so that the danger of burns to the operator can be eliminated, When raising the steel plate, the suspension part of the steel plate rotates in the suspension hole of the arm, so there is no risk of swinging of the steel plate, so there is no risk of the steel plate coming off the hanging tool and falling safely. It is possible to shift to a suspended state.

DESCRIPTION OF SYMBOLS 1 Hook 2 Hanging beam 2a Hook pin 2b Lever 3 Guide beam 3a Guide rail 4 Arm 4a Wheel 4b Hanging hole 4c Through hole 4d Ring 5 Arm moving mechanism 5a Rack 5b Pinion 5c Drive shaft 5d Electric motor C Notch H Hanging part S Steel plate T Water tank

Claims (1)

In the hanging tool used when lifting the steel plate vertically,
A suspended beam suspended horizontally by a crane and extending horizontally,
Two arms supported horizontally by the suspension beam;
An arm moving mechanism that horizontally moves the two arms in opposite directions to open and close their distance;
With
The two arms have circular suspension holes that respectively engage with suspension portions formed on both sides of one end in the longitudinal direction of the steel plate ,
A steel plate suspension, wherein a radial bearing is provided in the suspension hole .

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