JP2017040413A - Grate bar pressing jig, pressing method and side wall replacing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grate bar pressing jig, a pressing method and a side wall replacing method carrying out under application of the grate bar pressing jig at a Dwight-Lloyd sintering machine in which the grate bar can be prevented from being dropped from a pallet bogie with a side wall being removed.SOLUTION: This invention relates to a grate bar pressing jig used at a pallet bogie for a Dwight-Lloyd sintering machine comprising: a ketazine engaging part engaged with a ketazine to which a side wall of the pallet bogie is attached; and a nonskid part oppositely facing an outer surface of the grate bar, which is the nearest to the ketazine, of a plurality of grate bars.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a jig and a pressing method for a great bar that can prevent the dropping of a great bar from a pallet truck with a side wall removed in a Dwight-Lloyd type sintering machine, and a method for holding a great bar. The present invention relates to a sidewall replacement method performed using a tool.

  In a Dwight-Lloyd type sintering machine (hereinafter, sometimes simply referred to as “sintering machine”), sintering raw materials are placed on endless moving pallet trucks connected in large numbers to perform sintering. Is called.

  The Dwight-Lloyd sintering machine will be described with reference to FIG. In the sintering machine, the pallet carriage 1 moves on a traveling rail (not shown) formed in an endless shape. In FIG. 6, the pallet carriage 1 moves on the upper side of the traveling rail from the left to the right in the figure. The sintered raw material is charged into the moving pallet truck 1 by the hopper 13, and the sintered raw material is ignited by the ignition furnace 12. The pallet truck 1 that has been evacuated and emptied turns upside down and moves from right to left in the figure.

  Next, an example of a pallet truck (hereinafter sometimes simply referred to as “cart”) used in the sintering machine is shown in FIGS. 1 and 2. FIG. 1 shows a schematic plan view of the pallet carriage, and FIG. FIG. 2 (a) shows the pallet truck 1 with the sidewall 5 attached thereto, and FIG. 2 (b) shows the pallet truck 1 with the sidewall 5 removed. As shown in FIG. 1, the traveling direction of the pallet truck 1 is X, the direction perpendicular to the traveling direction X (the lateral direction of the pallet truck) is Y, and as shown in FIG. A vertical direction Z is assumed. In FIG. 1, illustration of the side wall and the great bar pressing member is omitted.

  As shown in FIG. 2 (a), a wheel 11 that engages a running rail of the sintering machine is provided at the lower part of the pallet carriage 1, and the cross section has an inverted L-shape at the upper part of the pallet carriage 1. A digit 2 is provided. As shown in FIG. 1, the digits 2 are provided on the left and right of the upper surface of the pallet carriage 1 in parallel with the traveling direction X of the pallet carriage 1. By attaching the sidewalls 5 on the digits 2 via bolts or the like, side walls are formed on the left and right sides of the pallet carriage 1, respectively.

  Further, as shown in FIG. 1, a plurality of rails 3 are provided at intervals in a direction perpendicular to the digits 2. A plurality of great bars 4 are provided in the advancing direction X (three in the example of FIG. 1) and a plurality of rows in the lateral direction Y so as to extend between the adjacent rails 3. Although not shown, an insulation piece for heat insulation protection may be provided on the upper surface of the rail 3.

  The great bar 4 is installed by being fitted to the rail 3 in an enamel form (see FIG. 3A, details will be described later). The position of the great bar 4 is fixed in the traveling direction X and the vertical direction Z by the fitting with the rail 3. On the other hand, the great bar 4 can move in the lateral direction Y (hereinafter sometimes referred to as “side slip”). This is to facilitate removal from the pallet carriage 1 when the great bar 4 is replaced. The removal of the great bar 4 is performed at a notch 3e provided at the end of the rail 3 in the lateral direction Y.

  Conventionally, the position of the great bar 4 in the lateral direction Y is fixed using the sidewall 5. For example, Patent Documents 1 to 4 each disclose a technique of fixing the lateral position of the great bar 4 by using a specially shaped bolt or jig provided on the sidewall.

  A method of fixing the great bar 4 using a conventionally known sidewall 5 will be described with reference to the drawings. As shown in FIG. 1, the end great bar 4 a is arranged at the upper end of the notch 3 e in the rail 3 at the end in the lateral direction Y closest to the digit 2. Although not shown, the end great bar 4a may have a shape different from that of the other great bars 4 so that it can be easily fixed by the great bar pressing member 6. For example, the upper surface of the end great bar 4a may have a groove that can be fitted to the head of the great bar pressing member 6. In this case, the head of the great bar presser member 6 is fitted into the groove on the upper surface of the end great bar 4a, and the end of the great bar presser member 6 in which the thread is engraved as shown in FIG. The wall 5 is inserted into a through hole and inserted outward, and the grate bar pressing member 6 is fixed to the outside of the sidewall 5 with a nut or the like. The great bar pressing member 6 prevents the entire great bar 4 from sliding.

  Sintering is performed by charging a sintering raw material into a space formed by the sidewall 5 and the great bar 4. When the sintering machine is renewed, the sidewalls 5 are replaced and updated. Specifically, in order to cope with increased production of sintered ore, the existing sidewall 5 is replaced with a taller (longer) sidewall or a thicker (thick) sidewall. Or may be replaced.

  When the side wall 5 is replaced, the existing side wall is removed from the pallet carriage 1 and a new side wall is attached. As described above, the lateral position of the great bar 4 is fixed using the sidewall 5. If the sidewall 5 is removed from the pallet carriage 1 for replacement, the great bar 4 is unfixed in the lateral direction Y. Therefore, there is a possibility that the great bar 4 slips and falls off the pallet truck due to vibrations or the like during the sidewall replacement work, leading to a serious accident. In addition, when it is necessary to move the pallet truck during the replacement work of the sidewall, there is a similar possibility when the truck is moved.

  Conventionally, when the sidewall 5 is replaced, the replacement work is performed after the pallet truck 1 is stopped. In the sintering machine, the replacement work of the sidewall 5 can be performed in an area where there is no incidental equipment or the like around the rail and a sufficient space can be secured like the replacement work area V shown in FIG. Limited. When the side wall 5 is replaced, the great bar pressing member 6 is removed from the pallet truck, the existing side wall 5 is removed, and a new side wall 5 is attached in order.

  When replacing the side wall 5, the pallet truck 1 from which the existing side wall 5 has been removed cannot prevent the great bar 4 from slipping and falling off as described above, and is dangerous to move on the running rail. There is a problem that involves.

  Further, when the sidewall 5 is replaced with a long and thick member, it is necessary to renew the ignition furnace 12 and the hopper 13 so as not to interfere with the new sidewall 5. Conventionally, after renewal work of incidental facilities such as the ignition furnace 12 and the hopper 13, replacement work of the sidewall 5 in the pallet cart 1 is performed. In this case, the side wall 5 before replacement hinders the renewal work, and it is difficult to perform efficient work.

  Conventionally, there is no known method for preventing the side bar 5 from slipping or falling off with the side wall 5 removed from the pallet truck 1.

JP 2009-168399 A Japanese Patent Laid-Open No. 11-101579 JP-A-11-325741 No. 62-38226

  In the conventional side wall replacement method, when the side wall is replaced with a long and thick member, the renewal work such as the ignition furnace and the hopper and the replacement work of the side wall 5 cannot be performed at the same time. The construction period will be longer. Thereby, operation | movement of a sintering machine must be stopped over a long period of time, and there exists a problem that productivity of a factory will fall.

  In addition, the conventional sidewall replacement method also has a problem that it does not meet the needs of moving the pallet truck with the sidewall removed during the construction of the sintering machine.

  The present invention has been completed in view of the above problems, and a great bar pressing jig and a pressing method capable of preventing the dropping of the great bar from the pallet truck with the side wall removed. Provided is a method for exchanging sidewalls using a great bar holding jig.

Means of the present invention are as follows.
(1) A jig for holding a great bar used in a pallet cart of a Dwight-Lloyd-type sintering machine, a digit engaging portion that engages with a digit to which a sidewall is attached in the pallet cart, and a plurality of great bars And a non-slip portion facing the outer surface of the great bar closest to the digit.
(2) Great bar holding jig used in a pallet cart of a Dwight-Lloyd-type sintering machine, and a rail engaging portion that engages two rails provided at intervals in the pallet cart, and the rail And a bar-shaped member that is bridged between the rail engaging portions while having a pressing force of.
(3) Great bar holding jig used in a pallet carriage of a Dwight-Lloyd-type sintering machine, including a great bar closest to the digit and bundling a plurality of great bars arranged in the lateral direction A holding bar for a great bar, comprising:
(4) The side wall is removed from the pallet truck of the Dwight-Lloyd-type sintering machine, and the pallet truck with the side wall removed, the Great Bar described in any one of (1) to (3) above A method for holding a great bar, comprising attaching a holding jig.
(5) A sidewall replacement method comprising replacing a sidewall of a pallet truck of a Dwight-Lloyd type sintering machine according to the following procedures (i) to (vi).
(I) Stop the moving pallet truck in the Dwight-Lloyd sintering machine.
(Ii) Of the pallet trucks located in the replacement work area of the Dwight-Lloyd-type sintering machine, the sidewall is removed from the pallet trucks to be exchanged.
(Iii) The grab bar holding jig described in any one of (1) to (3) above is attached to each of both end portions of all pallet trucks from which the side walls have been removed. Wear one or more in between.
(Iv) The pallet truck is moved, and the operations (i) to (iii) are repeated for all the pallet trucks whose sidewalls are to be replaced.
(V) When the pallet truck attached with the holding jig for the great bar reaches the replacement work area, the pallet truck is stopped, and the great bar holding jig is removed from the pallet truck in the exchange work area. After mounting, move the pallet truck.
(Vi) Repeat step (v) for the number of pallet trucks whose side walls are to be replaced.

  When the great bar holding jig in (1) is used for a pallet truck with the side wall removed, the slip bar prevents the great bar from slipping, and the digit engaging part prevents the great bar holding jig from moving. The position is fixed. As a result, the great bar is prevented from sliding off and falling off the pallet truck through the notch at the end of the rail.

  When the jig for holding the great bar in (2) is used for a pallet truck with the side wall removed, the outer surface of the great bar is caught with the rail engaging portion, so that the great bar is not cut into the rail. Reaching the part is prevented. Therefore, the great bar is prevented from falling off the pallet carriage through the notch portion of the rail.

  When the jig for holding a great bar in (3) is used for a pallet carriage with the side wall removed, a plurality of great bars are bundled together by a bundling member. If a bundle of a plurality of great bars is not applied with a large force, it cannot slide to the side. By arranging such a bundle at the lateral end, a side slip of the entire great bar is prevented. Also, even if the bundle of great bars slides sideways and the great bar at the lateral end temporarily reaches the notch of the rail, the lateral length of the notch is usually equal to the width of one end great bar. Since they are equivalent, the bundle of great bars is prevented from falling off through the notch.

  According to the method for holding a great bar of the present invention, even if the pallet truck with the side wall removed on the rail is moved on the running rail, the great bar slides sideways and falls off the pallet truck due to vibration during movement. Is prevented.

FIG. 1 is a schematic plan view of a pallet truck. 2A and 2B are schematic cross-sectional views taken along the line DD 'in FIG. 1, in which FIG. 2A shows a state where a sidewall is attached, and FIG. 2B shows a state where the sidewall is removed. FIG. 3 is an explanatory view showing an example of a holding bar for a great bar according to the present invention, (a) is a side view seen from the direction of arrow A in FIG. 1, and (b) is a plan view of (a). (C) is a schematic side view seen from the direction of arrow B in (b). FIG. 4 is an explanatory view showing another example of the holding jig for the great bar of the present invention, (a) is a side view seen from the direction of arrow A in FIG. 1, and (b) is a view of (a). It is a top view, (c) is the EE 'cross section schematic of (b). FIG. 5 is an explanatory view showing another example of the holding jig for the great bar of the present invention, wherein (a) is a side view seen from the direction of arrow A in FIG. 1, and (b) is a plan view of (a). (C) is an FF ′ cross-sectional schematic diagram of (b), and (d) is a GG ′ cross-sectional schematic diagram of (b). FIG. 6 is a schematic view of a Dwight-Lloyd type sintering machine.

  Hereinafter, the present invention will be specifically described.

  The holding bar holding jig of the present invention is used in a Dwight-Lloyd type sintering machine. In the Dwight-Lloyd type sintering machine, an endless moving pallet truck connected in large numbers is used. A rail is attached to the upper part of the pallet truck, a great bar is attached to the upper part of the rail, and sidewalls are provided on the upper surfaces of the digits on both sides of the upper part of the pallet truck.

  As shown in FIG. 1, the pallet carriage 1 has digits 2 on the upper left and right. During operation of the sintering machine, the side wall 5 is attached to the digit 2. The digit 2 is provided with a plurality of rails 3 a, 3 b, 3 c, and 3 d (collectively referred to as “rails 3”) at intervals in the lateral direction. The great bars 4 are arranged. Further, an end great bar 4a is provided at a position closest to the digit 2 in order to prevent the great bar 4 from slipping. The end great bar 4a may have a shape different from that of a normal great bar.

  As shown in FIG. 2A, during the operation of the sintering machine, the great bar pressing member 6 is provided so as to penetrate the sidewall 5 and press the upper surface of the end great bar 4a. The great bar pressing member 6 prevents the end great bar 4a from falling off from the lateral end of the rail 3, and prevents the great bar 4 from slipping. In the drawing, a gap is provided between the great bars 4 adjacent in the lateral direction Y, but they may be arranged without providing a gap.

  As shown in FIG. 3A, the great bar 4 includes an upper claw portion 4b and a lower claw portion 4c, and the side surface shape is formed in a π-shape. A rail 3 is provided on the top of the digit 2 of the pallet carriage 1. The rail 3 forms a substantially T shape in a side view. The great bar 4 is fitted to the rail 3 by the upper claw portion 4b and the lower claw portion 4c, and is provided between the rails 3. The upper claw portion 4b may be extended to the vicinity of the center of the rail 3, and the lower claw portion 4c may be anchored to the rail 3 so as not to come off. Although not shown, the end great bar 4a has a shape in side view that can be fitted to the rail 3 by an upper claw portion and a lower claw portion, similarly to the great bar 4.

  As shown in FIG. 2B, when the sidewall 5 is removed from the pallet carriage 1, the upper surface of the digit 2 is exposed. In this state, the end great bar 4a easily falls off from the lateral end portion of the rail, and the side slide of the great bar 4 cannot be prevented. Note that a stepped portion that is lower than the surroundings may be provided on the inside of the upper surface of the digit 2.

  As shown in FIG. 1, a notch 3 e is provided at a part of the end of the rail 3 in the lateral direction Y. The end great bar 4a and the great bar 4 are removed through the notch 3e. The lateral length of the notch 3e is substantially equal to the width of the end great bar 4a. During operation of the sintering machine, as shown in FIG. 1, the end great bar 4 is arranged at the position of the notch 3e. Further, as shown in FIG. 2A, the great bar pressing member 6 penetrating the sidewall 5 presses the upper surface of the end great bar 4a, thereby preventing the great bar 4 from slipping and falling off.

  When the side wall 5 is replaced, the great bar pressing member 6 is first removed, and then the existing side wall 5 is removed from the digit 2 of the pallet carriage 1. By removing the great bar pressing member 6 and the sidewalls 5, the end great bar 4a can be easily detached from the rail 3. Specifically, after removing the great bar pressing member 6 and the sidewall 5, the lower claw at one end in the longitudinal direction of the end great bar 4a is engaged with the rail 3 in the notch 3e, The lower claw portion is not engaged with the rail 3. In this state, the end great bar 4a is removed from the pallet truck 1 by lifting the end great bar 4a upward. After the end great bar 4a is removed, the great bar 4 remaining on the pallet truck 1 can easily slide sideways. The great bar 4 can be slid to the notch 3e, and the great bar 4 can be removed from the pallet truck 1 in the same manner as described above.

  All the great bars 4 can be removed from the rails 3 by providing the notch portions 3e in at least one of the two adjacent rails 3 into which one great bar 4 is fitted. Specifically, in the example of FIG. 1, the great bar 4 that spans between the rail 3 a and the rail 3 b is removed through a notch 3 e on the rail 3 a side of the rail 3 b, and between the rail 3 b and the rail 3 c. The great bar 4 to be passed is removed through the notch 3e on the rail 3c side of the rail 3b, and the great bar 4 to be passed between the rail 3c and the rail 3d is notched provided on the rail 3d side of the rail 3c. It is removed through part 3e.

  Next, the holding jig for the great bar of the present invention will be described.

The great bar pressing jig 41 shown in FIG. 3 is engaged with the digit 2 and its position is fixed. As shown in FIG. 3C, the holding jig 41 of the great bar has a digit engaging portion 41a whose side shape is L-shaped. The digit engaging portion 41 a is in contact with the upper surface of the digit 2 on the inner side and is opposed to the outer surface of the digit 2. The great bar holding jig 41 is used in the pallet truck after the side wall 5 and the end great bar 4a are removed. Accordingly, the end great bar 4a is not shown in FIGS. 3 (a) to 3 (c).
Further, if necessary, several great bars 4 may be removed from the pallet truck 1 before the mounting of the great bar pressing jig 41.

  The holding jig 41 for the great bar has a non-slip portion 41b. As shown in FIG. 3C, the anti-slip portion 41 b is provided at the inner step portion of the great bar presser portion 2, and the great bar 4 located closest to the digit 2 on the end surface (opposing surface) in the lateral direction B. Opposite to the outer surface. When the great bar 4 slides to the end in the lateral direction Y, the opposing surface of the anti-slip portion 41b prevents the great bar 4 from slipping, so that the great bar 4 at the lateral end passes through the notch 3e. This prevents the rail 3 from falling off. Further, the non-slip portion 41b is integrated with the digit engaging portion 41a and has a function of mechanically supporting the digit engaging portion 41a so as not to be pushed outward.

  The great bar pressing jig 41 may include a bolt 41c. As shown in FIG. 3C, the bolt 41 c passes through a bolt hole provided in a part of the carriage engaging portion 41 a and a gap provided in a part of the digit 2 and reaches the inside of the digit 2. . This prevents the great bar holding jig 41 from being displaced particularly in the vertical direction Z, and the position of the great bar holding jig 41 can be more firmly fixed. Note that an insertion member such as a pin can be used instead of the bolt 41c.

  Next, another aspect of the present invention will be described. The great bar pressing jig 51 shown in FIG. 4A has rail engaging portions 51a at both ends and engages with two rails 3 provided at intervals. The great bar holding jig 51 is used in the pallet truck after the side wall 5 and the end great bar 4a are removed. Accordingly, the end great bar 4a is not shown in FIGS. 4 (a) to 4 (c). Further, if necessary, several great bars 4 may be removed from the pallet truck 1 before the mounting of the great bar pressing jig 51.

  A rod-like member 51b is stretched between the rail engaging portion 51a and the rail engaging portion 51a. The bar-shaped member 51b may be a member having sufficient strength, and for example, a bar steel is used. The rod-shaped member 51 b applies a sufficient pressing force to the rail 3 so that the rail engaging portion 51 a is displaced in the lateral direction Y and does not come off the rail 3. An adjustment member 51c may be provided on a part of the rod-shaped member 51b so as to adjust the pressing force. By preventing the displacement of the bar-shaped member 51b in the lateral direction Y, even when the side wall is removed, the claw portion of the great bar 4 located at the end in the lateral direction Y reaches the notch 3e of the rail 3, The great bar 4 is prevented from falling off the rail 3. As such a great bar pressing jig 51, for example, a turnbuckle can be used. 4B is a plan view of FIG. 4A, and FIG. 4C is a cross-sectional view taken along line EE ′ of FIG. 4B.

  In addition, as long as it can fix between two rails, the shape of the rail engaging part 51a is not restrict | limited in particular. For example, the rail engaging portion 51a may be formed in a rectangular shape in a side view, and one side of the rectangle may be bridged between the rails 3 in the form of a tension bar by pressing the side surface of the rail 3.

  Next, another aspect of the present invention will be described. As shown in FIGS. 5C and 5D, in the great bar pressing jig 61, a channel 61a having a U-shaped cross section is used as a binding member. The channel 61a includes two flanges 61b and a web 61c provided between the flanges 61b. The inner method H between the flanges 61 b in the channel 61 a has a length that allows the plurality of great bars 4 to be bundled in the lateral direction B. The channel 61a is provided so as to sandwich a plurality (three in FIG. 5) of the great bars 4 by two flanges 61b. The number of great bars to be bundled can be adjusted as appropriate so that the length in the lateral direction Y of the bundle of great bars formed by the binding member is longer than the length in the lateral direction Y of the notch 3e. The bundle of the great bars 4 formed by the bundling member may or may not include the end great bars 4a. 5A is a side view showing a state in which the holding jig 61 for the great bar is attached, and FIG. 5B is a plan view of FIG. 5A.

  When the great bar holding jig 61 is mounted, the great bar 4 at the end portion in the lateral direction Y must slide sideways as a bundle of two or more. Usually, the length in the lateral direction B of the notch 3e in the rail 3 corresponds to the width of almost one end great bar 4a, so that even if two or more great bars 4 slide sideways, the length from the notch 3e. The great bar 4 is prevented from falling off. Therefore, by using the holding jig 61 for the great bar, it is possible to prevent the great bar 4 from dropping from the pallet carriage 1 even when there is no sidewall 5.

  The holding bar 61 for the great bar may include a fixing bolt 61d. In the example shown in FIG. 5 (c), a screw hole is provided in a part of the flange 61b, and the fixing bolt 61d inserted through the screw hole has a side surface of the great bar 4 at the end in the lateral direction Y at its tip. Press. Further, in the example shown in FIG. 5D, the front end portion of the fixing bolt 61d inserted through the screw hole of the flange 61b contacts the lower surface of the great bar 4 at the lateral Y end portion. By providing the fixing bolt 61d, it is possible to more reliably prevent the channel 61a from being detached from the surface of the great bar 4.

  The bundling member used for the holding bar for the great bar is not limited to the above example. For example, a plurality of great bars can be bound by winding a wire as a binding member around the outer peripheral surfaces of the plurality of great bars.

  One or more of the great bar pressing jigs of the present invention are provided between the rails. For example, as shown in FIGS. 4 (a) and 5 (a), in an example in which one pallet truck has four rails 3a to 3d, the holding jigs for the great bar are respectively provided at both end portions of the pallet truck. More than one is provided. In addition, in one pallet truck, a plurality of types of the above-mentioned great bar pressing jigs 41, 51, and 61 may be used in combination.

  Next, the sidewall replacement method of the present invention will be described with reference to FIG.

  In the example of FIG. 6, the pallet carriage 1 travels from the left to the right in the drawing on the upper side of the traveling rail. Ancillary facilities such as a floor hopper 13B, a raw material hopper 13A, and an ignition furnace 12 are provided in the upstream part of the rail, and in the downstream part, the ore that takes out the sintered ore and turns the pallet truck up and down. Ancillary facilities such as section 15 are provided. The heavy machinery and the like can access the pallet carriage 1 only in the exchange work area V without these incidental facilities. In the exchange work area V, the pallet truck 1 is positioned above the traveling rail, and there is no obstacle around the surrounding equipment, and there is sufficient space for performing the work of removing and attaching the sidewalls in the pallet truck 1. It can be secured.

Replace the side wall according to the following procedure.
(I) The pallet truck is stopped so that the pallet truck to be replaced with the side wall is located in the replacement work area V.
(Ii) Of the pallet trucks that are stopped in the replacement work area V, the sidewall is removed from the pallet truck that is the target of the replacement work. Note that the number of pallet trucks to be replaced may be one or a plurality of pallet trucks that are stopped in the replacement work area V. When removing the side wall, the great bar holding member is removed, and if necessary, the end great bar and several great bars are removed from the pallet truck.
(Iii) One or more of the above-mentioned great bar holding jigs (hereinafter sometimes simply referred to as “holding jigs”) are attached to the rails on both side ends of all the pallet trucks from which the side walls have been removed. Install so that it is located between the rail and the rail. By attaching the pressing jig, it is possible to prevent the great bar from falling off the rail.
(Iv) The pallet truck is moved, and the operations (i) to (iii) are repeated for all the pallet trucks whose sidewalls are to be replaced. After the procedures (i) to (iv), the pallet truck 1 with the holding jig attached is moved sequentially from the replacement work area V to the downstream side, and the pallet truck 1 before the sidewall replacement is replaced from the upstream side. Move to work area V. When the predetermined number of pallet trucks 1 before the sidewall replacement has moved to the replacement work area V, the pallet truck 1 is stopped, and among the pallet trucks 1 that have newly moved to the replacement work area V, the sidewalls are replaced. In the replacement work area V, the side wall is removed and the holding jig is attached.
(V) Removal of the holding jig and attachment of a new sidewall to the pallet carriage 1 are performed on the sintering machine. These operations are performed in the replacement work area V. Specifically, the pallet carriage 1 is stopped when the pallet carriage 1 provided with a predetermined number of pressing jigs is positioned in the replacement work area V. Next, with respect to all of the pallet carriages 1 to which the pressing jigs located in the replacement work area V are attached, the pressing jigs are removed and new sidewalls are attached. When a new sidewall is attached, a great bar, an end great bar, and a great bar holding member are attached as necessary. Further, the same operation is performed on the pallet carriage 1 provided with the holding jig, which has moved the pallet carriage 1 and newly flows from the upstream to the replacement work area V. By repeating these operations, new sidewalls can be attached to all of the pallet carts 1 to which the pressing jigs in the sintering machine are attached.

  When the side wall is replaced, it is common to perform repair work on the auxiliary equipment of the sintering machine. For example, when replacing the side wall with a longer and thicker member in order to increase the production capacity of the sintering machine, refurbishment of the hopper 13 and the ignition furnace 12 etc. is performed so as to correspond to the new side wall. There is a need to do.

  In (ii) and (iii) above, in the pallet carriage 1 with the side wall removed and the great bar pressing jig attached, an operator can get on the upper surface of the great bar as a scaffold. An operator can get on the great bar of the pallet truck 1 and perform work on the raw material hopper 13A, the floor hopper 13B, the ignition furnace 12, and the like. As a result, in the sidewall replacement method of the present invention, the sidewall replacement work and the incidental equipment work can proceed simultaneously, and the work period of the renewal work for the sintering machine can be shortened. Specifically, in the sidewall replacement method of the present invention, the worker can perform the construction work of the incidental equipment using the great bar as a scaffold, and the steps of attaching the scaffold and performing the scaffold dismantling for the construction work of the incidental equipment are performed. It can be omitted, and the construction period of incidental facilities can be shortened.

  In addition, in the sidewall replacement method of the present invention, when the work is performed on the pallet truck with the sidewalls attached, the parts of the sintering machine that cannot be maintained due to the presence of the sidewalls can be easily obtained. Maintenance will be possible. Furthermore, even when the pallet truck 1 moves to the lower part of the traveling rail and the pallet truck is turned upside down, the great bar is slid by the great bar holding jig and the great bar is dropped through the rail cutout. Therefore, it is not necessary to perform a curing for safety under the sintering machine, and the on-site safety can be improved.

  Side wall replacement work was performed on the pallet carriage 1 of the sintering machine shown in FIG. The target sintering machine was provided with 148 pallet trucks 1 in total. Further, the number of pallet trucks 1 located in the exchange work area V where the side wall can be removed and attached and the holding jig for the great bar can be attached and removed was 22. By using the great bar holding jig of the present invention, the construction period could be shortened by about 37% compared to the conventional method.

DESCRIPTION OF SYMBOLS 1 Pallet cart 2 Digits 3, 3a, 3b, 3c, 3d Rail 3e Notch part 4 Great bar 4a End grate bar 4b Upper claw part 4c Lower claw part 5 Side wall 6 Great bar holding member 11 Wheel 12 Ignition furnace 12A Secondary furnace 12B Primary furnace 13 Hopper 13A Raw material hopper 13B Bedding hopper 15 Excavation parts 41, 51, 61 Great bar holding jig 41a Digit engagement part 41b Non-slip part 41c Bolt 51a Rail engagement part 51b Rod-like member 51c Adjustment member 61a Channel 61b Flange 61c Web 61d Fixing bolt X Traveling direction Y Lateral direction Z Vertical direction H Internal method

Claims (5)

A holding bar for a great bar used in a pallet truck of a Dwight-Lloyd sintering machine,
A digit engaging portion that engages a digit to which a sidewall is attached in the pallet cart;
A non-slip portion that faces the outer surface of the great bar closest to the digit among the plurality of great bars;
A holding bar for a great bar, comprising: A holding bar for a great bar used in a pallet truck of a Dwight-Lloyd sintering machine,
A rail engaging portion that engages with two rails provided at intervals in the pallet carriage;
A rod-like member that is bridged between the rail engaging portions while having a pressing force on the rail;
A holding bar for a great bar, comprising: A holding bar for a great bar used in a pallet truck of a Dwight-Lloyd sintering machine,
A great bar holding jig comprising a bundling member including a great bar closest to a digit and bundling a plurality of laterally arranged great bars. Remove the sidewall from the pallet truck of the Dwight Lloyd type sintering machine,
4. A method for holding a great bar, comprising: attaching a jig for holding a great bar according to any one of claims 1 to 3 to a pallet truck from which a side wall has been removed. A side wall replacement method comprising replacing a side wall of a pallet truck of a Dwight-Lloyd-type sintering machine according to the following procedures (i) to (vi).
(I) Stop the moving pallet truck in the Dwight-Lloyd sintering machine.
(Ii) Of the pallet trucks located in the replacement work area of the Dwight-Lloyd-type sintering machine, the sidewall is removed from the pallet trucks to be exchanged.
(Iii) The grab bar holding jig according to any one of claims 1 to 3 is provided between the rails between each side end of each pallet truck from which the side walls have been removed. Wear one or more.
(Iv) The pallet truck is moved, and the operations (i) to (iii) are repeated for all the pallet trucks whose sidewalls are to be replaced.
(V) When the pallet truck attached with the holding jig for the great bar reaches the replacement work area, the pallet truck is stopped, and the great bar holding jig is removed from the pallet truck in the exchange work area. After mounting, move the pallet truck.
(Vi) Repeat step (v) for the number of pallet trucks whose side walls are to be replaced.

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