JP2020046097A - Pallet truck and sintering machine - Google Patents

Abstract

To reduce air leakage between the edge face of a pallet truck and the edge face of an adjacent pallet truck.SOLUTION: A pallet truck 10 comprises: a pallet frame 2; a pair of side plates 1 disposed at both the edges in the width direction of the pallet frame 2; and a seal bar 4 inserted into a recessed part 2b formed at the lower face of the pallet frame 2 and elongating in the carrying direction of the pallet truck. In at least one of edge faces 1a and 2a of both the edge faces in the carrying direction of the pallet truck, a groove 5 is formed from an upper edge 1u of each side plate 1 to the vicinity of the seal bar of the pallet frame 2. The groove 5 is inserted with a seal member 3 projected from the edge face of the pallet truck and contacted with the edge face of the adjacent pallet truck.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sintering machine having a plurality of pallet trucks arranged adjacent to each other on an endless track, and a pallet truck.

  The sintering machine has a plurality of pallet trucks arranged on an endless track. The pallets are adjacent to each other and form a continuous conveyor. Raw materials for sintering are loaded and transported on a plurality of continuous pallets. During transportation, fuel such as coke breeze in the loaded raw material is ignited. Under the plurality of pallets on which the raw materials are loaded, a group of wind boxes for generating a plurality of continuous negative pressures are arranged. The group of wind boxes is connected to an induced exhaust fan. After ignition, the iron ore is heated and partially melted to form sintered ore by burning the coke breeze in the raw material.

  In the sintering machine, a plurality of pallet trucks loaded with raw materials are subjected to, for example, a sintering machine driven sprocket, which exerts a pushing force toward an ore discharging portion. Due to this force, a plurality of pallet trucks may move at an accelerated speed, and a gap between the pallets may be generated. Dust particles are trapped at the moment a gap is created. Thereafter, the calcination proceeds without leaving the gaps between the pallets without the pallet end faces being in close contact with each other. The gap causes air leakage. Leakage is air that is drawn into the wind box without contributing to the combustion of the firing reaction. Leakage does not pass through the loaded raw material layer, but reaches the wind box, for example, between pallet trucks, between pallet trucks and the wind box, or through a gap between the side plate and the raw material layer. If there is a large amount of air leakage, the power of the induced exhaust fan is increased, and the productivity is significantly reduced. For this reason, many proposals have been made regarding the air leakage reduction technology.

  One such technique is to provide a seal structure for attaching a seal plate to a gap between the side plates in a range of the side plates. For example, Japanese Unexamined Utility Model Publication No. 61-034099 (Patent Document 1) (Japanese Unexamined Utility Model Publication No. 63-40782) discloses a configuration in which a sheet plate is inserted into a concave groove on the front end surface of a sidewall. This sheet plate has a long hole inclined downward toward the front. The sheet plate is supported by a support pin penetrating the elongated hole so as to protrude from the groove. When a gap is formed between adjacent sidewalls, the sheet plate protrudes from the concave groove and closes the gap by its own weight.

  Japanese Unexamined Utility Model Publication No. 59-186797 (Patent Document 2) discloses that the gap between the end faces of a pallet frame and a pallet side frame and the end faces of another pallet frame and the pallet side frame adjacent thereto is hermetically closed. A seal mechanism including a seal plate and a press fitting is disclosed.

  Japanese Utility Model Laid-Open Publication No. Sho 61-038497 (Patent Document 3) discloses a spring mechanism that presses a seal plate toward a side wall adjacent to the seal plate seat of the side wall.

  Japanese Patent Application Laid-Open No. Hei 9-14856 (Patent Document 4) discloses that a pin or a bolt of a seal plate and a pin or a bolt of a side wall are connected by a connecting member so that an end surface of the seal plate is connected to an end surface of the side wall. It is disclosed to be configured to be crimped so as to be able to move in parallel.

  In Japanese Utility Model Laid-Open Publication No. Sho 62-130398 (Patent Document 5), a tubular seal body is inserted into a vertical groove formed by attaching a presser foot to a side plate with a bolt in a cutout step on an end surface of a side plate of a pallet. Is disclosed. A portion of the tubular seal protrudes from the groove and comes into close contact with the side plate of another adjacent pallet. The tubular seal body is formed of a thin tubular body having a coil spring inserted therein.

JP-A-61-034099 JP-A-59-186797 Japanese Utility Model Laid-Open No. 61-038497 JP-A-9-14856 Japanese Utility Model Publication No. 62-130398

  For example, when a seal plate that seals between side plates as in Japanese Utility Model Application Laid-Open No. 61-034099 (Patent Document 1) is used, the seal plate is a rigid body such as a casting. The seal plate contacts the adjacent pallet by its own weight. Therefore, the contact state may be deteriorated or the seal plate may not reach the lowermost end due to slight biting of dust or poor movement of the pin supporting the seal plate. In this case, a gap remains. A similar phenomenon may occur even in the configuration disclosed in Japanese Patent Application Laid-Open No. Hei 9-14856 (Patent Document 4).

  In the case of Japanese Unexamined Utility Model Publication No. 59-186797 (Patent Literature 2), the seal plate is fixed to the pressing fitting by bolts. The pressing hardware is also fixed to the side plate with bolts. In this configuration, the position error is large. For this reason, it is difficult to reliably seal because the sealing plate is too protruded or retracted. Further, if the seal plate is plastically deformed due to the bite of dust or the like, thereafter, the gap between the pallets is expanded by the deformed shield plate. Further, since the seal plate is divided into the side plate region and the frame region, it is not possible to prevent the leakage at the division position. In addition, there is a gap between the seal member and the seal bar on the lower surface of the pallet frame, and air leakage occurs.

  Japanese Utility Model Laid-Open No. 61-038497 (Patent Document 3) discloses that when a pallet truck is displaced relative to an adjacent pallet truck in a direction perpendicular to the transport direction, that is, when the pallet truck is meandering, a seal plate is formed. There is a risk that the pallet truck will not abut easily on the end face of the adjacent pallet truck, but rather will hit it.

  In the configuration disclosed in Japanese Utility Model Laid-Open Publication No. Sho 62-130398 (Patent Document 5), a holding member for holding the seal member is attached to the side plate by a bolt. Therefore, the bolt may be loosened by the driving force of the sintering machine. In addition, the bolts may be broken if the hardware fastened by the bolts sandwiches dust. Also, this configuration does not seal the entire pallet end face.

  As described above, reducing the leakage in the sintering machine has been a conventional problem, but improvement of the seal structure is desired. Therefore, an object of the present invention is to provide a pallet truck and a sintering machine that can reduce the leakage of air between the end surface of the pallet truck and the end surface of an adjacent pallet truck by a configuration different from the conventional one. I do.

  The pallet truck in one embodiment of the present invention is a pallet truck of a sintering machine having a plurality of pallet trucks arranged adjacent to each other on an endless track. The pallet truck, a pallet frame, a pair of side plates disposed at both ends in the width direction of the pallet frame, and a seal bar that is inserted into a recess formed on the lower surface of the pallet frame and extends in the transport direction of the pallet truck. Is provided. A groove is formed on at least one end face of the pallet truck in the transport direction from the upper end of the side plate to the vicinity of the seal bar of the pallet frame. The pallet truck includes a seal member inserted into the groove and partially projecting from an end surface of the pallet truck.

  According to the present disclosure, it is possible to reduce the air leakage between the end surface of the pallet truck and the end surface of the adjacent pallet truck.

FIG. 1 is a diagram of the pallet truck according to the present embodiment as viewed from a transport direction. FIG. 2 is a side view of two adjacent pallet trucks. FIG. 3 is an enlarged view of a portion including the groove of FIG. FIG. 4 is a view showing a modification of the shape of the groove 5. FIG. 5 is a diagram in which the upper end of the side plate is viewed from above. FIG. 6 is a view showing a modified example of the groove and the seal member. FIG. 7 is a view showing a modification of the groove and the seal member. FIG. 8 is a sectional view showing a modification of the pallet truck. FIG. 9 is a view showing a modification of the pallet truck. FIG. 10 is a side view of the pallet truck shown in FIG. 9 as viewed from the width direction. FIG. 11 is a diagram illustrating an example of the arrangement of the groove and the seal member. FIG. 12 is a view showing a modification of the arrangement of the groove and the seal member. FIG. 13 is a view showing a modification of the arrangement of the groove and the seal member.

  In a sintering machine, a plurality of wind boxes having a continuous negative pressure (for example, approximately −1600 mmAq) are arranged under a pallet truck loaded with raw materials for sintering. The seal bar provided at the lower end of the pallet truck moves while being in contact with the wear bar (slide bed) located at the upper end of the wind box. Thereby, the space of the wind box below the pallet truck is isolated from the atmosphere. The amount of air leakage in the gap between the adjacent pallet trucks above the seal bar is affected by, for example, the unevenness of the pallet end surface, the adhesion, or the uniformity of the pushing force of the pallet truck. It can be said that the smaller the acceleration movement of the pallet truck, the higher the pressing force of the pallet truck is.

  The end faces of the adjacent pallet trucks exist by the number of pallet trucks. For this reason, even if the gap between the end faces is very small, when the number of pallet trucks is large (for example, 100 to 200 pallets), the opening becomes considerable. The inventors have studied a structure for improving the adhesion between the end face of the pallet truck and the end face of the adjacent pallet truck and reducing the air leakage.

  Conventionally, from the viewpoint of measures for sealing the side plate, which has been mainly proposed, a configuration in which the part from the upper end of the side plate to the seal bar at the lower end of the pallet frame is integrally sealed was examined from a different viewpoint. As a result of the study, the following embodiment has been conceived.

(Configuration 1)
The pallet truck in the embodiment of the present invention is a pallet truck of a sintering machine having a plurality of pallet trucks arranged adjacent to each other on an endless track. The pallet truck, a pallet frame, a pair of side plates disposed at both ends in the width direction of the pallet frame, and a seal bar that is inserted into a recess formed on the lower surface of the pallet frame and extends in the transport direction of the pallet truck. Is provided. A groove is formed on at least one end face in the transport direction of the pallet truck from the upper end of the side plate to the vicinity of the seal bar of the pallet frame. The pallet truck includes a seal member inserted into the groove and protruding from an end surface of the pallet truck.

  According to the above configuration 1, the seal member is located from the upper end of the side plate to the vicinity of the seal bar of the pallet frame, between the end face of the pallet cart and the end face of the adjacent pallet cart. Thereby, the end face of the side plate and the end face of the pallet frame can be integrally sealed. Therefore, the sealing performance between the end face of the pallet cart and the end face of the adjacent pallet cart can be improved. As a result, it is possible to reduce the air leakage between the end surface of the pallet truck and the end surface of the adjacent pallet truck with a configuration different from the conventional one.

  The groove is formed from the upper end of the side plate to the vicinity of the seal bar of the pallet frame. That is, the groove is formed so as to reach the inside of the pallet frame from the upper end of the side plate, and further approach the seal bar. Thereby, the end of the seal member is arranged near the seal bar. Therefore, the sealing performance between the end face of the pallet cart and the end face of the adjacent pallet cart can be further improved. As an example of the groove reaching the vicinity of the seal bar, for example, the shortest distance between the groove and the seal bar can be set to 20 mm or less. It is preferable that the shortest distance between the groove and the seal bar is 5 mm or less. The groove may reach a lower end of the pallet frame or a seal bar. The shortest distance between the groove and the seal bar is the distance between the groove and the portion where the seal bar comes closest.

(Configuration 2)
In the pallet truck having the above configuration 1, the seal member may be configured to be detachable from the groove. Thereby, the arrangement of the seal member with respect to each groove can be flexibly changed in consideration of the hermeticity between the pallet trucks, the ease with which dust accumulates in the grooves, and the like.

(Configuration 3)
In the pallet truck of the above configuration 1 or 2, the cross-sectional shape of the groove may be a shape in which the width of the inside of the groove is wider than the width of the opening of the groove. That is, the cross-sectional shape of the groove may be a shape in which the edge at the end face of the groove is narrowed from the inside of the groove. This makes it easier to hold the seal member in the groove with a part of the seal member protruding from the opening of the groove. Further, the seal member can be easily detached from the groove. For example, disposing the seal member in the groove so that a part of the seal member protrudes from the opening of the groove and stops the entire seal member from jumping out of the groove by contacting the edge of the groove opening with the seal member. Can be. The cross-sectional shape of the groove may be the same from the upper end of the side plate to the vicinity of the seal bar of the pallet frame.

  The groove in the side plate may be formed by hollowing out the side plate which is an integral body. That is, all the inner surfaces of the grooves in the side plate may be surfaces of the side plate formed integrally. This eliminates the need for a holding member, a fastening member, and the like for holding the seal member. From the same viewpoint, the groove in the pallet frame may be formed by hollowing out a pallet frame, which is an integral body. That is, all the inner surfaces of the grooves in the pallet frame may be surfaces of the pallet frame formed integrally.

(Configuration 4)
In the pallet truck having the above configuration 3, the cross-sectional shape of the seal member may be a shape including a concave portion. In this case, the seal member includes the elastic member, is urged by the elastic member so as to be pushed out of the groove, and the recess is stopped from being pushed out due to the protrusion on the inner surface of the groove. It can be configured to be inserted in a state. With this configuration, since the elastic member pushes the seal member in a direction protruding from the groove, the force by which the seal member pushes the end face of the adjacent pallet truck increases. Therefore, the sealing performance of the sealing member is improved. When foreign matter is caught between the seal member and the end face of the adjacent pallet truck, the portion of the seal member that is caught retracts into the groove. Thereby, it is possible to reduce the air leakage due to the foreign matter being caught. In addition, in the portion where the seal member is retracted, dust particles that have entered the groove can be easily discharged from the groove.

  In the above configuration 4, the groove may have a shape that is inclined in the direction of the air leakage as the depth increases. That is, the groove may be shaped so as to be inclined toward the inside of the pallet truck as it becomes deeper. This makes it easier for dust entering the groove to be discharged.

  Further, in the above configuration 4, the protrusion on the inner surface of the groove may be provided on a part of the groove in the vertical direction. Thus, the protrusion provided on a part of the groove in the up-down direction comes into contact with the seal member to hold the seal member. At a portion where the protrusion of the groove is not provided, a space is formed between the groove and the seal member. Dust can be discharged from this space. Therefore, dust entering the groove is more easily discharged.

  Further, in the above-described configuration 4, in the contour of the cross section of the seal member, the contour on the side opposite to the concave portion can be linear. That is, the surface of the seal member may include a flat surface and a concave surface opposite to the flat surface. Further, the inner surface of the groove may include a flat portion and a protruding portion facing the flat surface and projecting toward the flat surface. In this case, the seal member is pushed by the male member, and the seal member is arranged in the groove in a state where the seal member flat surface contacts the groove flat surface and the seal member concave surface contacts the protrusion of the groove. Is done. Thereby, the sealing performance by the sealing member is further improved, and the dust that has entered the groove is easily discharged.

(Configuration 5)
In any one of the constitutions 1 to 4, the seal member may be integrally formed from an upper end of the side plate to a position near a seal bar of the pallet frame. That is, the seal member may have a continuous shape from the upper end of the end face of the side plate to the vicinity of the seal bar on the end face of the pallet frame. Thereby, the sealing performance of the sealing member can be improved. The seal member may be a seal member divided at the boundary between the side plate of the pallet and the pallet frame. In this case, the divided seal members may be arranged in the groove in contact with each other. This makes it possible to provide a seal member that is substantially continuous from the upper end of the side plate to the vicinity of the seal bar.

(Configuration 6)
In the pallet truck according to any one of the above-described configurations 1 to 5, the lower end of the groove may be located inside the upper end of the groove in the width direction. Thereby, the lower end of the groove can be brought closer to the seal bar. By bringing the lower end of the groove closer to the seal bar, the gap between the seal member and the seal bar is reduced, and the air leakage is reduced. For example, at least a part of the groove may be skewed so that the distance from the seal bar in the width direction of the pallet decreases as going downward.

(Configuration 7)
In any one of the pallet trucks of the above-described configurations 1 to 6, the groove may be connected to an opening penetrating outside the side plate or the pallet frame. As a result, dust entering the groove is discharged through the opening.

(Configuration 8)
In the pallet truck according to any one of the above configurations 1 to 7, the side plate may be attached to the pallet frame as a member separate from the pallet frame. In this case, a packing extending in the transport direction may be provided between the side plate and the pallet frame. Thereby, when the side plate is deformed by the heat of sintering and a gap is generated between the side plate and the pallet frame, it is possible to prevent air leakage from the gap by the packing.

(Configuration 9)
The pallet truck of any of the above configurations 1 to 8 may include a pair of the grooves formed on both of the pair of side plates on at least one of both end surfaces in the transport direction. The seal member may be inserted into both of the pair of grooves. By providing the groove and the seal member on both of the pair of side plates of the pallet truck, it is possible to effectively prevent air leakage from both ends in the width direction of the end surface of the pallet truck.

(Configuration 10)
In the pallet truck according to the ninth aspect, the pair of grooves may be formed on both one end face and the other end face of both end faces in the transport direction. Thereby, it is possible to provide the seal mechanism both before and after in the transport direction of the pallet truck.

(Configuration 11)
In the pallet truck of the above configuration 9 or 10, the pair of grooves may be formed at positions symmetrical with respect to a virtual plane at the center in the width direction of the pallet truck. That is, the pair of grooves may be formed at positions symmetrical in the width direction. This facilitates the formation of the groove in the manufacturing process of the pallet truck.

(Configuration 12)
In the pallet truck according to any one of the above-described configurations 1 to 10, the groove on the one end surface and the groove on the other end surface are formed at positions that are asymmetric with respect to a virtual plane at the center in the width direction, and are formed in a vertical direction. It may be formed at a symmetrical position. Thereby, in the sintering, the positions of the grooves can be shifted in the width direction on the opposing end faces of the pallet trucks adjacent to each other. Further, by making the positions of the grooves point-symmetrical, even when the pallet truck is used with the transport direction reversed, the arrangement of the grooves on the end faces with respect to the adjacent pallet trucks can be made the same.

  As described above, the pallet truck may have the groove on both one end surface and the other end surface in the transport direction. In this case, the groove on the one end face and the groove on the other end face of the pallet truck may be displaced in the width direction of the pallet truck regardless of point symmetry. Thereby, for example, in the sintering machine, the position of the groove on the end surface of the pallet truck and the position of the groove on the end surface of the pallet truck adjacent to the pallet truck can be shifted.

(Configuration 13)
The sintering machine according to the embodiment of the present invention is a sintering machine having a plurality of pallet trucks arranged adjacent to each other on an endless track. Each of the plurality of pallet trucks is inserted into a pallet frame, a pair of side plates arranged at both ends in the width direction of the pallet frame, and a concave portion formed on the lower surface of the pallet frame, and in a transport direction of the pallet truck. An extending seal bar is provided. In each of the pairs of the adjacent pallet trucks, at least one pallet truck has a groove formed at an end surface adjacent to the other pallet truck from the upper end of the side plate to the vicinity of the seal bar of the pallet frame. You. At least one of the plurality of pallet trucks includes a seal member inserted into the groove and protruding from an end surface of the pallet truck. In a state where the pair of pallet trucks is loaded with and transported the raw material, the seal member protruding from the end surface of the one pallet truck comes into contact with the end surface of the other pallet truck.

  According to the sintering machine of the above configuration 13, between the end face of one pallet cart and the end face of the other pallet cart of the pair of adjacent pallet carts, The seal member is located near the seal bar of the pallet frame. Therefore, it is possible to reduce the air leakage between the end surface of the pallet truck and the end surface of the adjacent pallet truck by a configuration different from the conventional one.

(Configuration 14)
In the sintering machine having the above-described configuration 13, in each of the pair of pallet trucks, the one pallet truck has a pair of the grooves formed on both of the pair of side plates at an end face on a front side in a transport direction, and the pair of the pallet trucks, The seal member inserted into both of the grooves. Accordingly, when one pallet truck is a pallet truck disposed behind the pair of pallet trucks in the transport direction, a sealing structure for sealing both ends in the width direction is provided on the front end surface of the one pallet truck. Can be provided.

(Configuration 15)
In the sintering machine having the above-described configuration 13 or 14, in each of the pair of pallet trucks, the other pallet truck is provided at an end surface on a side adjacent to the one pallet truck, the one of the pair of side plates. The pallet truck may have the groove on a side plate adjacent to the side plate having the groove. In this case, the groove of the pallet of the one pallet truck and the groove of the other pallet truck are displaced in the width direction, and the groove of the pallet of the one pallet truck, A sealing material may be inserted into at least one of the grooves of one pallet truck. That is, the position of the groove on the end surface of one pallet truck of a pair of adjacent pallet trucks and the position of the groove on the end surface of the other pallet truck facing this end surface can be shifted in the width direction. Thereby, interference between the seal member of the groove of one pallet truck and the groove or seal member of the other pallet truck can be avoided.

  In the sintering machine having the above-described configuration 13 or 14, each of the plurality of pallet trucks may have the groove on one end surface of both end surfaces in the transport direction, and may not have the groove on the other end surface. Good. Thus, by providing the groove and the seal member only on one end surface of each of the plurality of pallet trucks in the transport direction, it is possible to seal between the plurality of pallet trucks. Each of the plurality of pallet trucks has a groove on each of both end surfaces in the transport direction, a seal member is inserted into a groove on one end surface of the both end surfaces, and a seal member is inserted into a groove on the other end surface. It is good also as a structure which does not do.

  In this specification, in the pallet truck, the direction in which the raw material for sintering is loaded is up, and the opposite direction is down. The transfer direction is a direction in which the pallet truck is transferred on the track. The width direction is a direction orthogonal to the transport direction and the vertical direction.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts have the same reference characters allotted, and description thereof will not be repeated.

(Embodiment 1)
The sintering machine in the present embodiment includes a plurality of pallet trucks arranged adjacent to each other on an endless track. FIG. 1 is a diagram of the pallet truck according to the present embodiment as viewed from a transport direction. The x-axis of the rectangular coordinate system shown in FIG. 1 is the width direction, the y-axis is the transport direction, and the z-axis is the vertical direction. The pallet truck 10 includes a pallet frame 2, a pair of side plates 1 disposed at both ends in the width direction of the pallet frame 2, and a plurality of great bars 8 disposed on the pallet frame 2 between the pair of side plates 1. . The plurality of great bars 8 constitute a grate. The pair of side plates 1 is attached to the upper surface of the pallet frame 2. The pair of side plates 1 extend upward from the pallet frame 2. A pair of wheels 7 are rotatably attached to the pallet frame 2. The axles 7a of the pair of wheels 7 extend in the width direction of the pallet frame 2. Raw materials for sintering are loaded on a grate. That is, the raw material for sintering is stored in the space surrounded by the grate of the plurality of great bars 8 and the pair of side plates 1.

  The wheels 7 roll on rails 11 extending in the transport direction. Inside the rail 11, a pair of wearers 13 extending in the transport direction and a pair of wearer supports 12 (wearer support portions) each supporting the pair of wearers 13 are arranged. On the lower surface of the pallet frame 2, two concave portions 2b extending in the transport direction are formed. The two concave portions 2b are separated from each other in the width direction. A pair of seal bars 4 extending in the transport direction are inserted into each of the two concave portions 2b. Each of the pair of seal bars 4 is attached to the pallet frame 2 in a vertically movable state. When the pallet truck 10 loads and conveys the raw material, the seal bar 4 moves relative to the wear bar 13 in the conveyance direction with the lower surface of the seal bar 4 in contact with the upper surface of the wear bar 13.

  Below the pallet cart 10, a plurality of wind boxes (not shown) are arranged. The plurality of wind boxes are arranged in the transport direction, that is, in the y direction. The space below the great bar 8 of the pallet truck and between the pair of seal bars 4, the pair of wear bars 13, and the pair of wear bar supports 12 is connected to the space in the wind box. The gas in the wind box is sucked by an induced exhaust fan (not shown). Negative pressure is generated in the wind box. That is, the space surrounded by the great bar 8, the pair of seal bars 4, the pair of wear bars 13, the pair of wear bar supports 12, and the wind box has a negative pressure.

  The end surface of the pallet truck 10 in the transport direction includes the end surface 1a of the side plate 1 and the end surface 2a of the pallet frame 2. The front end face of the pallet cart 10 faces the end face of the adjacent pallet cart (not shown) in the transport direction. On the end face of the pallet truck 10, the groove 5 is continuously formed from the upper end 1u of the end face 1a of the side plate 1 to the inside of the end face 2a of the pallet frame 2. As an example, the groove 5 extends from the upper end 1 u of the end surface 1 a of the side plate 1 to the vicinity of the seal bar 4 on the end surface 2 a of the pallet frame 2. The seal member 3 is inserted into the groove 5. The seal member 3 protrudes from the end surface of the pallet truck and contacts an end surface of an adjacent pallet truck (not shown). The seal member 3 is arranged from the upper end to the lower end of the groove 5, that is, over the entire groove 5. The sealing member 3 continuous from the vicinity of the seal bar 4 on the end surface of the pallet truck 10 to the upper end 1u of the side plate 1 comes into contact with the end surface of the adjacent pallet truck. Thereby, the air sucked into the wind box located below the pallet truck from between the pallet truck 10 and the adjacent pallet truck can be shut off.

  FIG. 2 is a side view of two adjacent pallet trucks 10A and 10B viewed from the side (outside in the width direction). As shown in FIG. 2, a gap S between the front end surfaces 1a and 2a of the pallet truck 10A and the rear end surfaces 1a and 2a of the adjacent pallet truck 10B is inserted into the groove 5 of the pallet truck 10A. Blocked by 3. Thereby, it is possible to prevent a leak from the gap S.

<Details of groove configuration>
FIG. 3 is an enlarged view of a portion including the groove 5 of FIG. As shown in FIG. 3, the groove 5 is formed to extend obliquely toward the inside of the pallet truck 10 as it goes downward from the upper end 1 u of the side plate 1. The distance in the width direction between the groove 5 and the seal bar 4 decreases as going downward. The lower end 5d of the groove 5 is located inward in the width direction from the upper end 5u of the groove 5. The distance between the groove 5 and the seal bar 4 in the width direction is the smallest at the lower end 5 d of the groove 5. The lower end 5 d of the groove 5 is located inside the end face 2 a of the pallet frame 2. As a specific example, the lower end 5 d of the groove 5 is located near the seal bar 4. That is, the lower end 5d of the groove 5 is located near the edge (corner) of the opening of the recess 2b. The lower end 5d of the groove 5 is located below the upper end 2bu of the recess 2b of the pallet frame 2 into which the seal bar 4 is inserted. The groove 5 in the pallet frame 2 extends obliquely from the upper end of the pallet frame 2 toward the edge (corner) of the concave portion 2b. The shortest distance between the groove 5 and the seal bar 4 can be, for example, 20 mm, preferably 50 mm or less. As an example, the distance T1 in the width direction between the lower end of the groove 5 and the concave portion 2b into which the seal bar 4 is inserted can be set within 20 mm, preferably within 50 mm. The lower end 5d of the groove may reach the lower end of the pallet frame 2 or the seal bar.

  Although not shown, a seal sheet attached to the wearer support 12 and in contact with the pallet frame 2 near the seal bar 4 may be provided. The seal sheet is attached to, for example, the wear bar support 12, and is provided so as to be in contact with a horizontal surface on the lower surface of the pallet truck 10 outside the seal bar 4 in the width direction. When a seal sheet is provided, the lower end of the groove 5 can be arranged near the position where the seal sheet contacts the pallet frame 2. For example, the distance between the seal sheet and the lower end of the groove 5 may be 20 mm or less, preferably 5 mm or less. The lower end of the groove may reach the lower end of the pallet frame 2 or the seal bar. Such a form is also an example of a form in which the lower end of the groove 5 is arranged near the seal bar 4.

  In the example shown in FIG. 3, the groove 5 does not reach the lower surface of the pallet frame 2. That is, the groove 5 does not penetrate the pallet frame 2. As a modification, the groove 5 may reach the lower surface of the pallet frame 2 and pass through the pallet frame 2.

  As shown in FIG. 3, the groove 5 is continuous from the upper end 1 u of the side plate 1 to the vicinity of the seal bar 4 at the lower part of the pallet frame 2, and the side plate 1 and the pallet are inserted by inserting the seal member 3 into the groove 5. The end face of the frame 2 can be integrally sealed. Therefore, the sealing performance of the end surfaces of the side plate 1 and the pallet frame 2 can be improved. Further, since the sealing member 3 is inserted into the groove 5, a fastening member or a holding metal for supporting the sealing member is not required. Therefore, it is difficult for air leakage due to biting of dust and displacement of the seal member to occur.

  In the example shown in FIG. 3, one seal member 3 is arranged so as to fill the entire groove 5, that is, from the upper end 1 u of the side plate 1 to the vicinity of the seal bar 4 of the pallet frame 2. On the other hand, a plurality of seal members 3 may be arranged continuously in a groove 5 from the upper end 1 u of the side plate 1 to the vicinity of the seal bar 4 of the pallet frame 2. The groove 5 shown in FIG. 3 extends from the upper end 1 u of the side plate 1 to the vicinity of the seal bar 4 on the end surface of the pallet truck 10 in the transport direction, not linearly but slightly curvedly.

  FIG. 4 is a view showing a modification of the shape of the groove 5. In the example illustrated in FIG. 4, the groove 5 is formed to extend linearly on the end surface of the pallet truck 10 in the transport direction. Specifically, the groove 5 extends linearly from the upper end 1u of the side plate 1 to the lower end of the side plate 1 (the boundary between the side plate 1 and the pallet frame 2), and furthermore, the upper end of the pallet frame 2 (the side plate 1 and the pallet frame 2). From the boundary) to the vicinity of the seal bar 4. The extending direction of the groove 5U on the end surface 1a of the side plate 1 and the extending direction of the groove 5D on the end surface of the pallet frame 2 may not be parallel. In the example shown in FIG. 4, the inclination in the width direction of the groove 5D on the end surface of the pallet frame 2 is larger than the inclination in the width direction of the groove 5U on the end surface 1a of the side plate 1. The groove 5U on the end surface 1a of the side plate 1 and the groove 5D on the end surface of the pallet frame 2 are connected to each other at the boundary between the side plate 1 and the pallet frame 2. The boundary between the side plate 1 and the pallet frame 2 is a connection point between these grooves 5U and 5D.

  In the configuration shown in FIG. 4, separate seal members can be inserted into the grooves 5U and 5D, respectively. That is, the seal member 3 arranged in the groove 5U of the side plate 1 and the seal member 3 arranged in the groove 5D of the pallet frame 2 may be separated from each other.

<Configuration example of groove and seal member>
FIG. 5 is a view of the upper end 1u of the side plate 1 as viewed from above. The seal member 3 is inserted into the groove 5. The cross-sectional shape of the groove 5 is such that the maximum width inside the groove 5 is wider than the width of the opening of the groove 5. In the example shown in FIG. 5, the cross-sectional shape of the groove 5 is an arc shape. The cross-sectional shape of the groove 5 is the same from the upper end 1 u of the side plate 1 to the vicinity of the seal bar 4. The groove 5 is provided at the upper end 1 u of the side plate 1 in a region including the center in the width direction of the side plate 1.

  The seal member 3 is housed in the groove 5. The seal member 3 is continuous from the upper end 1 u of the side plate 1 to the vicinity of the seal bar 4. The cross-sectional shape of the seal member 3 is the same from the upper end 1 u of the side plate 1 to the vicinity of the seal bar 4. Part of the seal member 3 protrudes from the groove 5 and protrudes from the end surface 1 a of the side plate 1. Since the opening of the groove is narrower than the inside, the seal member 3 is stopped so as not to go outside the groove by hanging over the edge of the opening of the groove. This prevents the seal member 3 from protruding from the groove 5 more than necessary or falling off. The cross section of the seal member 3 is circular. For this reason, when the seal member 3 comes into contact with the end face of the adjacent pallet truck, pinching is less likely to occur.

  The seal member 3 has a columnar elastic member 31 and a metal plate 32 wound around a side surface of the elastic member 31. The metal plate 32 has a cylindrical shape and is partially missing in the circumferential direction. Thereby, the cross-sectional shape of the seal member 3 is easily elastically deformed. Therefore, the followability with respect to the end surface of the adjacent pallet truck with which the seal member 3 contacts is improved. The metal plate 32 protrudes from the opening of the groove 5 and contacts the end face of the adjacent pallet truck. The metal plate 32 is an example of a contact member. The elastic member 31 can be, for example, a heat-resistant material. The elastic member 31 may be, for example, a packing. The metal plate 32 can be, for example, a heat-resistant iron plate. As a modification, the seal member 3 may be an integrated member made of a material that can be deformed flexibly such as heat-resistant rubber. The seal member 3 may be, for example, a cylindrical and flexible structure. That is, the seal member 3 can have a structure that can be pushed into the groove 5. Thereby, even if the distance between the two end faces of the pallet trucks adjacent to each other changes, or if the two end faces are shifted in the width direction, the sealing function can be maintained. Further, it is possible to prevent a gap from being created between the seal member and the pallet truck. Further, the seal member 3 can be made detachable from the groove 5.

  FIG. 6 is a view showing a modified example of the groove 5 and the seal member 3. FIG. 6 is a diagram of the upper end 1u of the side plate 1 as viewed from above. The cross-sectional shape of the groove 5 is such that the maximum width inside the groove 5 is wider than the width of the opening of the groove 5. The seal member 3 includes a contact member 33 protruding from the opening of the groove 5 and contacting an end face of an adjacent pallet truck, and an elastic member 34 disposed between the contact member 33 and the groove 5. The contour of the cross section of the contact member 33 includes a curved portion and a straight portion. The contact member 33 is arranged so that a part of the curved portion protrudes from the groove 5 and the linear portion contacts the elastic member 34. The contact member 33 is inserted into the groove 5 while being urged by the elastic member 34 so as to be pushed out of the groove 5 and stopped from being pushed out in relation to the inner surface of the opening of the groove 5. The contact member 33 contacts the end surface 1a of the adjacent pallet truck while being pressed by the elastic member 34. Thereby, the space between the end face 1a of the pallet cart 10A and the end face 1a of the adjacent pallet cart 10B is sealed. When the seal member 3 bites a foreign substance, the bite portion of the seal member 3 retracts into the groove. Therefore, the followability of the seal member 3 to the end face of the adjacent pallet truck is improved. Further, dust particles that have entered the groove 5 are easily discharged. In the example shown in FIG. 6 as well, the seal member 3 is detachable from the groove 5.

  FIG. 7 is a view showing a modification of the groove 5 and the seal member 3. FIG. 7 is a view of the upper end 1u of the side plate 1 as viewed from above. The cross-sectional shape of the groove 5 is such that the maximum width inside the groove 5 is wider than the width of the opening of the groove 5. The seal member 3 includes a contact member 33 protruding from the opening of the groove 5 and contacting an end face of an adjacent pallet truck, and an elastic member 34 disposed between the contact member 33 and the groove 5. The groove 5 shown in FIG. 7 is inclined in the direction in which the air leaks (the direction of arrow F). That is, as the groove 5 becomes deeper, the groove 5 is inclined toward the inside of the pallet truck. In addition, the groove 5 may include a protrusion 5 a that holds the seal member 3 at a plurality of positions in the vertical direction (that is, the height direction or the z direction) of the side plate 1. Thereby, the space between the groove 5 and the seal member 3 can be increased in a range other than the portion of the protrusion 5 a that holds the seal member 3. Dust that has entered the groove 5 can be discharged from this space.

  The inner surface of the groove 5 is a portion of a flat surface 5b inclined toward the inside of the pallet truck as it becomes deeper, and a surface opposite to the flat surface 5b, and a projection 5a protruding toward the flat surface 5b. Including the part. Since the flat surface 5b of the groove 5 comes into contact with the seal member 3, it is preferable that the surface is smoothed.

  The surface of the contact member 33 includes a flat portion and a concave surface on the opposite side of the flat surface, that is, on the back side. In the example shown in FIG. 7, the concave surface of the contact member 33 has a gourd-shaped uneven shape. The elastic member 34 is attached to a plane portion of the contact member 33. The elastic member 34 is a spring plate including a flat plate portion and a curved plate portion. The flat portion of the elastic member 34 is fixed to the plane of the contact member 33. The surface of the sealing member 3 includes a flat surface and a concave surface on the opposite side of the flat surface. The plane of the seal member 3 comes into contact with the plane 5b of the groove 5, and the concave surface of the seal member 3 comes into contact with the projection 5a of the groove 5. An elastic member 34 is arranged inside the groove 5 between the contact member 33 and the inner surface of the groove 5. The elastic member 34 pushes the contact member 33 in a direction to push it out of the groove 5. With this configuration, a force is applied to the seal member 3 to push it out of the groove 5, and the seal member 3 is brought into contact with the end face of the adjacent pallet truck. Thereby, the space between the end face 1a of the pallet cart 10A and the end face 1a of the adjacent pallet cart 10B is sealed. When the seal member 3 bites a foreign substance, the bite portion of the seal member 3 retracts into the groove. Thereby, the followability of the seal member 3 to the end face of the adjacent pallet truck is improved. Further, dust particles that have entered the groove 5 are easily discharged. Also in the example shown in FIG. 7, the seal member 3 is detachable from the groove 5.

<Example of packing between side plate and pallet frame>
FIG. 8 is a sectional view showing a modification of the pallet truck. FIG. 8 shows a part of a cross section of the pallet truck in a plane perpendicular to the transport direction. In the example shown in FIG. 8, the side plate 1 is attached to the pallet frame 2 as a member different from the pallet frame 2. A packing 6 is provided between the side plate 1 and the pallet frame 2. The packing 6 extends in the transport direction. The packing 6 can be provided continuously from the front end face to the rear end face of the pallet truck, for example. On at least one of the side plate 1 and the pallet frame 2, a groove extending in the transport direction for accommodating the packing 6 may be formed. In the example shown in FIG. 8, a step 1c is provided on the contact surface of the side plate 1 with the pallet frame 2. A step 2c is also provided on the contact surface of the pallet frame 2 with the side plate 1. These steps 1c, 2c fit each other. As a result, even if the side plate 1 is deformed by the heat of the raw material and a gap is formed between the side plate 1 and the pallet frame 2, the gap is shielded by the packing 6 and the mating surfaces of the steps 1c and 2c, thereby preventing air leakage. Can be prevented. It is preferable that the position of the packing 6 on the end surface in the transport direction does not overlap with the groove 5.

<Example of groove opening>
FIG. 9 is a view showing a modification of the pallet truck. FIG. 9 is a view of the pallet truck viewed from the transport direction. FIG. 10 is a side view of the pallet truck shown in FIG. 9 as viewed from the width direction. In the example shown in FIGS. 9 and 10, the groove 5 is connected to the opening 1 b penetrating outside the side plate 1. The opening 1 b is a recess formed on the end face of the side plate 1. The opening 1 b extends from the groove 5 to the outer surface of the side plate 1. The dust that has entered the groove 5 is discharged out of the groove 5 through the opening 1b. The opening 1b connecting the groove and the outer surface may be provided in the pallet frame 2. Further, a plurality of openings 1b may be provided for one groove 5.

  The present invention is not limited to the above embodiment. For example, in the example shown in FIG. 14, in each of the plurality of pallet trucks, grooves are provided on both the front end face and the rear end face. On the other hand, in each of the plurality of pallet trucks, a configuration may be employed in which a groove is provided on one of the front end face and the rear end face, and the other is not provided with a groove.

  FIG. 11 is a diagram showing an example of the arrangement of grooves and seal members in a plurality of pallet trucks on which raw materials are loaded and conveyed. In the example shown in FIG. 11, each of the plurality of pallet trucks 10 </ b> A to 10 </ b> C has a pair of grooves 5 and 5 on the front end face, and no groove is provided on the rear end face. A pair of grooves 5, 5 on the front end face of each pallet truck are provided on both the pair of side walls 1. That is, on the front end face of the pallet truck, one groove 5 is formed on one side wall 1 and one groove 5 is formed on the other side wall 1. The sealing members 3 are inserted into the pair of grooves 5 on the front end face, respectively. The sealing members 3, 3 of each pallet truck protrude from the grooves 5, 5, and contact the rear end face of the adjacent front pallet truck. In the example shown in FIG. 11, the position of the front end face in the width direction of the groove 5 is the same for all of the plurality of pallet trucks 10A to 10C. In each pallet truck, the pair of grooves 5, 5 on the front end face are formed at positions symmetrical with respect to the virtual plane CF at the center in the width direction.

  As a modified example of the configuration shown in FIG. 11, each of the plurality of pallet trucks 10A to 10C may not have a groove on the front end face, and may have a pair of grooves 5, 5 on the rear end face. . Further, a pair of grooves 5, 5 may be arranged asymmetrically with respect to the center surface in the width direction on the front end surface or the rear end surface of each pallet truck. Further, a pair of grooves 5 may be provided on both the front end face and the rear end face of each pallet truck. In this case, the raw materials are put on the pallet truck in a state where the sealing members 3 and 3 are inserted into both of the pair of grooves 5 and 5 on the front end face and the sealing members are not inserted into any of the grooves 5 and 5 on the rear end face. It can be loaded and transported.

  FIG. 12 is a view showing a modification of the arrangement of the grooves and the seal members in the plurality of pallet trucks. In the example shown in FIG. 12, each of the plurality of pallet trucks 10A to 10C has one groove 5 on the front end face and one groove on the rear end face. On the front end face of each pallet truck, a groove 5 is provided on one of the left and right, and no groove is provided on the other of the left and right. On the rear end face of each pallet truck, a groove 5 is provided on the other of the left and right, and no groove is provided on one of the left and right. The sealing members 3 are inserted into the grooves 5 on the front end face and the rear end face, respectively. The groove 5 on the front end face is formed on one side plate (the right side plate in the example of FIG. 12) of the pair of side plates, and the groove 5 on the rear end face is formed on the other side plate (the left side plate in the example of FIG. 12). ). Note that the number of grooves on each end face is not limited to the above example. For example, at least one of the front end face and the rear end face may be provided with three or more grooves. In the example shown in FIG. 12, in each pallet truck, the groove on one end face in the transport direction and the groove on the other end face are formed at positions asymmetrical with respect to the virtual plane at the center in the width direction and have a point as viewed from above and below. It is formed in a symmetrical position.

  FIG. 13 is a view showing a modified example of the arrangement of the groove 5 and the seal member 3 in a plurality of pallet trucks on which raw materials are loaded and conveyed. In the example shown in FIG. 13, in each of the pallet trucks 10A, 10B, and 10C, the pair of grooves 5, 5 and the pair of seal members 3, 3 on the rear end face are connected to the pair of grooves 5, 5, and the pair on the front end face. Is shifted to the right with respect to the sealing member 3. As described above, in each of the plurality of pallet trucks, the pair of grooves on the front end surface and the pair of grooves on the rear end surface are shifted in the same direction, so that the width direction of the Can be kept from overlapping.

  In the example shown in FIG. 13, in each of the plurality of pallet trucks 10 </ b> A to 10 </ b> C, a pair of grooves 5, 5 on the front end face in the transport direction and a pair of grooves 5, 5 on the rear end face are imaginary planes in the width direction center. It is formed at a position asymmetrical with respect to the CF and at a point symmetrical position when viewed from above and below. In this case, an imaginary axis KJ extending in the vertical direction passing through the center in the width direction and the center in the transport direction of the pallet carts 10A to 10C is a point-symmetric rotation axis. Thus, even if the pallet trucks are replaced or the pallet trucks are used upside down, it is possible to prevent the adjacent pallet trucks from overlapping the widthwise positions of the grooves. In the example shown in FIG. 13, all of the plurality of pallet trucks 10 </ b> A to 10 </ b> C have the same positions of the grooves 5 and 5 on the front end face, and the same positions of the grooves 5 and 5 on the rear end face.

  In the example shown in FIG. 13, in each pallet truck, the pallets are inserted with the sealing members 3 inserted into both the pair of grooves 5, 5 on the front end face and the pair of grooves 5, 5 on the rear end face. Raw materials are loaded and transported on a cart. As a modified example, in each pallet truck, in a state where the sealing members 3 are inserted into both the pair of grooves 5 on the front end face and the sealing member 3 is not inserted into any of the pair of grooves 5 on the rear end face, Raw materials may be loaded and transported on a pallet truck.

  As mentioned above, although one Embodiment of this invention was described, the above-mentioned embodiment is only an illustration for implementing this invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the spirit thereof.

1: Side plate 2: Pallet frame 3: Seal member 4: Seal bar 5: Groove

Claims (15)

A pallet truck of a sintering machine having a plurality of pallet trucks arranged adjacent to each other on an endless track,
A pallet frame,
A pair of side plates arranged at both ends in the width direction of the pallet frame,
A seal bar that is inserted into a recess formed on the lower surface of the pallet frame and extends in the transport direction of the pallet truck;
On at least one end face of both end faces in the transport direction of the pallet truck, a groove formed from the upper end of the side plate to the vicinity of the seal bar of the pallet frame,
A seal member inserted into the groove and partially projecting from an end face of the pallet truck. The pallet truck according to claim 1,
The pallet truck, wherein the seal member is detachable from the groove. The pallet truck according to claim 1 or 2,
A pallet truck, wherein the cross-sectional shape of the groove is a shape in which the inner width of the groove is wider than the width of the opening of the groove. A pallet truck according to claim 3,
The cross-sectional shape of the seal member is a shape including a concave portion,
The seal member includes an elastic member, is urged by the elastic member so as to be pushed out of the groove, and is inserted in a state where the concave portion is stopped from being pushed out due to a protrusion on the inner surface of the groove. The pallet truck according to claim 3, wherein A pallet truck according to any one of claims 1 to 4,
The pallet truck, wherein the seal member is integrally formed from the upper end of the side plate to the vicinity of the seal bar. A pallet truck according to any one of claims 1 to 5,
A pallet truck, wherein a lower end of the groove is located inside the upper end of the groove in the width direction. A pallet truck according to any one of claims 1 to 6,
The pallet truck, wherein the groove is connected to an opening penetrating outside the side plate or the pallet frame. A pallet truck according to any one of claims 1 to 7,
The side plate is attached to the pallet frame as a separate member from the pallet frame,
A pallet truck, wherein a packing extending in the transport direction is provided between the side plate and the pallet frame. A pallet truck according to any one of claims 1 to 8,
A pallet truck comprising a pair of grooves formed on both of the pair of side plates on at least one of both end surfaces in the transport direction, wherein the seal member is inserted into both of the pair of grooves. A pallet truck according to claim 9,
A pallet truck, wherein the pair of grooves is formed on both one end face and the other end face of the both end faces in the transport direction. The pallet cart according to claim 9 or 10,
The pallet truck, wherein the pair of grooves are formed at positions symmetrical with respect to a virtual plane at the center in the width direction of the pallet truck. The pallet truck according to any one of claims 1 to 10,
The groove on the one end surface and the groove on the other end surface are formed at positions that are asymmetric with respect to an imaginary plane at the center in the width direction, and are formed at positions that are point-symmetrical when viewed from above and below. A sintering machine having a plurality of pallet trucks arranged adjacent to each other on an endless track,
Each of the pallet trucks,
A pallet frame,
A pair of side plates arranged at both ends in the width direction of the pallet frame,
A seal bar that is inserted into a recess formed on the lower surface of the pallet frame and extends in the transport direction of the pallet truck.
In each pair of adjacent pallet trucks,
At least one of the pallet trucks,
On the other end surface of the side adjacent to the pallet truck, a groove formed from the upper end of the side plate to the vicinity of the seal bar of the pallet frame,
A seal member inserted into the groove and protruding from an end face of the one pallet truck,
In a state in which the pair of pallet trucks are loaded with and transported raw materials, the seal member protruding from the end surface of the one pallet truck contacts the end surface of the other pallet truck,
Sintering machine. The sintering machine according to claim 13,
The sintering machine, wherein the one pallet truck includes a pair of the grooves formed on both of the pair of side plates and the seal member inserted into both of the pair of grooves on an end surface on a front side in a transport direction. The sintering machine according to claim 13 or 14,
The other pallet truck has the groove on a side plate adjacent to the side plate having the groove of the one pallet truck, of the pair of side plates, on an end surface adjacent to the one pallet truck,
The groove of the pallet of the one pallet truck and the groove of the other pallet truck are shifted in the width direction, and the groove of the pallet of the one pallet truck and the other pallet A sintering machine, wherein a sealing material is inserted into at least one of the grooves of the cart.

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