Steel cleaning equipment

Abstract

To provide a steel material washing device capable of efficiently washing a large number of steel materials such as sheet piles together. [Solution] The steel cleaning device 1 of the present invention comprises a cleaning machine 10 that sprays cleaning water for cleaning steel materials 50, and a relative movement means for moving the cleaning machine 10 to any coordinate position, and the cleaning machine 10 comprises one or more oscillating nozzles 30 that spray cleaning water while oscillating in an arc-shaped trajectory within a plane that intersects with the surface of the steel material 50 to be cleaned, and one or more counterweights that oscillate in a direction opposite to the oscillating nozzle 30, and these are arranged so that the inertial force of either one is not eccentric relative to the inertial force of the other in the direction of the oscillation axis, and the other oscillating fulcrum axis is arranged on the opposite side of one of these oscillating fulcrum axes across a line connecting the swing turn points of the pivot axes of the oscillating levers.

Description

[Technical Field]

[0001] The present invention relates to a steel material cleaning device capable of cleaning steel materials used to construct soil cement column walls, retaining walls, etc. [Background technology]

[0002] For example, in earth retaining and root excavation work, when constructing the underground portion of a structure, steel materials such as sheet piles are used to construct soil cement column walls or retaining walls to secure the holes formed by excavating the ground so that they do not collapse.

[0003] After that, once the underground structure has stabilized, the steel materials used to construct the soil cement column walls, earth retaining walls, etc. are extracted, cleaned, and reused at another site. Conventionally, cleaning has been done by hand, which is a very time-consuming task, so there is a need for a technology to efficiently clean such steel materials. Examples of technologies for cleaning steel materials include the inventions described in Patent Documents 1 to 3.

[0004] Patent Document 1 discloses a tube bundle cleaning device that sprays high-pressure water from a nozzle onto a tube bundle removed from a heat exchanger to clean it. This tube bundle cleaning device has an arm support movably mounted on a guide rail extending in the longitudinal direction above the tube bundle. A first arm extends obliquely downward from the arm support toward one side of the tube bundle, and a second arm extends obliquely downward toward the other end face. A base is movably mounted on each arm, and a nozzle is attached to each base.

[0005] High-pressure water is sprayed from each nozzle while the arm support is moved along the guide rail, and the position of each base is moved at a predetermined pitch along each arm, so that the entire tube bundle can be washed with high-pressure water from two directions.

[0006] Furthermore, Patent Document 2 discloses a technology for making smaller and lighter pressurized water spray guns used to clean pipe-shaped or plate-shaped temporary equipment for construction scaffolding with pressurized water. The pressurized water spray gun includes a device main body supported on a support via a swivel mechanism and swivelable within a predetermined swivel angle range around a swivel axis, a plurality of rod-shaped nozzle heads supported in parallel on the device main body so as to be rotatable around a plurality of rotation axes parallel to the swivel axis and having pressurized water flow paths formed therein, a plurality of spray nozzles formed in the longitudinal direction of the rod-shaped nozzle heads, a rotation and water supply mechanism that rotates the plurality of rod-shaped nozzle heads and supplies pressurized water to the flow paths of the plurality of rod-shaped nozzle heads, and fixing means that fixes the rotation of the device main body within the swivel angle range, and the total length of the rod-shaped nozzle heads when arranged in a straight line is equivalent to the width of the widest type of temporary equipment.

[0007] Patent Document 3 also discloses a steel plate cleaning device for steel plates such as sheet piles, which includes a steel plate placement section, a cleaning nozzle that sprays cleaning water in a direction along a first direction of the placement surface of the steel plate placement section and toward the placement surface, a cleaning nozzle horizontal section that moves the cleaning nozzle in a second direction that intersects with the direction along the first direction of the placement surface of the steel plate placement section, a cleaning nozzle vertical section that moves the cleaning nozzle horizontal section along the first direction of the placement surface of the steel plate placement section, and a control section that controls the operation of the cleaning nozzle vertical section and the cleaning nozzle horizontal section, and in which the control section controls the repetition of the horizontal movement of the cleaning nozzle along the second direction and the vertical movement in the first direction that moves it a distance shorter than the length of the placement surface.

[0008] The above-mentioned cleaning device is said to be able to enhance the cleaning effect by oscillating multiple cleaning nozzles arranged in parallel, and to make it easier to rinse the cleaning water off the steel plate being cleaned by controlling the phase of the outlets of the multiple cleaning nozzles so that they move back and forth out of sync. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Publication No. 2013-029232 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-107171 [Patent Document 3] Patent No. 6792594 Summary of the Invention [Problem to be solved by the invention]

[0010] The cleaning device described in Patent Document 1 is a device that cleans each tube bundle removed from a heat exchanger, while the device described in Patent Document 2 is intended for temporary equipment used in construction scaffolding and is not designed to clean a large number of generally long steel materials such as sheet piles at once.

[0011] The cleaning device described in Patent Document 3 is intended for steel plates such as sheet piles, and is designed to clean many long steel plates at once. However, because the two cleaning nozzles are moved vertically and horizontally while oscillating out of phase with each other, the support mechanism for the cleaning nozzles is subjected to uneven loads, making it difficult to maintain stability.

[0012] Furthermore, with only a swinging nozzle, the height distance from the object to be cleaned fluctuates, resulting in uneven cleaning results and an unstable cleaning finish. The device is difficult to stabilize due to the reaction caused by the uneven swing load, which can easily lead to problems such as damage to the device. An excessively large support structure is required to stabilize the device.

[0013] Furthermore, after cleaning one side of the steel plate, all of the steel plates must be turned over in order to clean the other side. This means that the cleaning operation must be temporarily stopped while the steel plates are being turned over, resulting in poor work efficiency.

[0014] 8 is an embodiment in which the swing nozzle 30 and the counterweight 40 are each provided at only one location on one side. In this configuration, the eccentric relationship between the swing nozzle and the counterweight can cause torsional load within the plane, which can increase the load on the support structure and lead to mechanical problems.

[0015] The present invention was made in light of the above-mentioned background and aims to provide a steel material cleaning device capable of efficiently cleaning steel materials such as sheet piles used in construction of soil cement column walls, earth retaining walls, etc., with a rational configuration that does not require excessively large support structures and has a structure that is more robust against mechanical troubles. [Means for solving the problem]

[0016] The steel cleaning device of the present invention is a steel cleaning device comprising a cleaning machine that sprays cleaning water for cleaning steel materials, and a relative movement means that moves the relative position of the steel material and the cleaning machine to any position, wherein the cleaning machine comprises one or more oscillating nozzles that oscillate while spraying cleaning water toward the surface of the steel material to be cleaned, and one or more counterweights that oscillate in a direction opposite to the oscillating nozzle, and are arranged so that the inertial force of either the oscillating nozzle or the counterweight is not eccentric relative to the inertial force of the other in the direction of the oscillating axis.

[0017] By arranging the oscillating nozzle and the counterweight so that the inertial force of either one is not eccentric relative to the inertial force of the other in the axial direction of the oscillation, it is possible to solve the torsional load that occurs in the device, protect the entire structure of the steel cleaning device that supports the oscillating nozzle from the impact of the recoil, and configure the steel cleaning device with a rational structure.

[0018] Another form of the steel cleaning apparatus of the present invention is a steel cleaning apparatus comprising a cleaning machine that sprays cleaning water for cleaning steel materials, and relative movement means that moves the relative position of the steel material and the cleaning machine to any position, wherein the cleaning machine comprises one or more oscillating nozzles that oscillate while spraying cleaning water toward the surface of the steel material to be cleaned, and one or more counterweights that oscillate in a direction opposite to the oscillating nozzle, and the other oscillating fulcrum axis is located on the opposite side of the oscillating fulcrum axis of either the oscillating nozzle or the counterweight, across a line connecting turning points of the oscillation at predetermined points radially away from the oscillating fulcrum axis.

[0019] By arranging the other fulcrum axis on the opposite side of a predetermined point radially away from the fulcrum axis of either the oscillating nozzle or the counterweight, for example, across a line connecting the front and rear turning points of the trajectory of the swing of the center point of the axis that pivots the oscillating lever and the oscillating link, the reaction forces of the inertial forces of the oscillating nozzle and the counterweight act in the same direction relative to the radial direction of the drive shaft, thereby preventing the generation of a torsional load that tends to rotate the drive shaft radially within a plane.

[0020] Furthermore, the reaction force acting on the drive shaft and the reaction force acting on each swing fulcrum shaft are offset, thereby suppressing the reaction of the entire device support structure.

[0021] Yet another form of the steel cleaning apparatus of the present invention is a steel cleaning apparatus comprising a cleaning machine that sprays cleaning water for cleaning steel materials, and relative movement means for moving the relative position of the steel material and the cleaning machine to any position, wherein the cleaning machine comprises one or more oscillating nozzles that oscillate while spraying cleaning water toward the surface of the steel material to be cleaned, and one or more counterweights that oscillate in a direction opposite to the oscillating nozzle relative to the oscillating nozzle, and the nozzle oscillating fulcrum axis and counterweight oscillating fulcrum axis, which are the fulcrums for the oscillation of the oscillating nozzle and the counterweight, respectively, are connected to the oscillating drive shaft, which is driven to rotate by a oscillating drive motor, by a link mechanism via a nozzle drive rotating arm and a counterweight drive rotating arm that are arranged on either side of the oscillating drive motor.

[0022] Furthermore, in the steel cleaning equipment of the present invention, a steel material placement section is provided in which a plurality of the steel materials are laid out, and the relative movement means is a horizontal movement means consisting of a lateral movement means for reciprocating the cleaning machine in a direction perpendicular to the longitudinal direction of the steel materials, and a vertical movement means for moving the cleaning machine in the longitudinal direction of the steel materials, and the cleaning machine preferably comprises one or more fixed nozzles that spray cleaning water toward the surfaces to be cleaned of the steel materials laid out in the steel material placement section, and one or more oscillating nozzles that spray cleaning water while oscillating in an arc-shaped trajectory within a plane in a direction intersecting the surfaces to be cleaned.

[0023] The horizontal movement means is used to move the cleaning machine to any horizontal coordinate position in the steel material installation area, and allows cleaning while moving in a direction along the longitudinal direction of the steel material or in a direction intersecting the longitudinal direction. Because the horizontal movement means is provided, there is no need to move the steel material until cleaning is complete.

[0024] The cleaning machine is equipped with one or more fixed nozzles, which allow cleaning of the steel materials laid out in the steel material placement area while maintaining a constant height relative to the surface to be cleaned. In addition to the fixed nozzles, it is also equipped with one or more oscillating nozzles, which allow cleaning by oscillating in an arc-shaped trajectory within a plane that intersects with the surface of the steel materials to be cleaned.

[0025] In addition to the oscillating nozzle, it is equipped with a fixed nozzle that maintains a constant height relative to the steel material (object to be cleaned) during cleaning, so that the cleaning water sprayed from the oscillating nozzle generates a flow of cleaning water, while the cleaning water from the fixed nozzle can be used to clean locally. This allows it to handle a wide range of stubborn stains and provides stable cleaning performance.

[0026] The steel material placement section is not particularly limited in terms of specifications or shape, but for example, it may have a mesh structure so that the washing water used to wash the steel material flows downward.

[0027] In the steel material cleaning apparatus of the present invention, the cleaning machine may be provided with a cleaning machine height adjustment means for adjusting the height in the up-down direction relative to the relative movement means.

[0028] By providing the washer with a washer height adjustment means for adjusting the vertical height relative to the horizontal movement means, it can easily accommodate different sizes of steel materials. Also, by providing an actuator to the washer height adjustment means, for example, if steel materials are laid out in a steel material installation area at a slope for drainage, it can be automatically controlled to accommodate changes in the height of the slope, and by maintaining a constant nozzle height relative to the steel materials, it can provide stable cleaning performance.

[0029] The cleaning machine may also be provided with a rotating means for rotating the entire cleaning machine around an axis. By providing the cleaning machine with a rotating means, the cleaning direction can be easily changed, for example, the cleaning direction relative to the steel materials laid out in the steel material placement section can be changed without moving the steel materials. [Effects of the Invention]

[0030] The steel material cleaning apparatus of the present invention has the above-mentioned configuration and provides the following effects.

[0031] (1) By arranging the axial positioning relationship of the oscillating nozzle and the counterweight, which are the oscillating bodies, in a balanced manner so that the inertial force of either oscillating body relative to the inertial force of the other oscillating body is not eccentric in the axial positioning, the occurrence of torsional loads within a plane can be avoided, and efficient cleaning of steel materials can be performed using the oscillating nozzle without the need for an excessively large support structure.

[0032] (2) By optimizing the positional relationship between the axes of the oscillating nozzle and counterweight and the lever, the torsional load that was generated around the vertical axis of the machine core is eliminated, reducing the burden on the oscillating mechanism parts such as the motor and the support structure, and achieving high durability with a more rational structure.

[0033] (3) The arrangement in which the swing drive motor is sandwiched between the nozzle drive rotating arm and the counterweight drive rotating arm allows for a simplification of the structure by reducing the number of components such as the drive transmission parts of the swing drive mechanism, which not only provides cost benefits but also improves the durability of the structure by reducing the number of components, which in turn reduces the causes of mechanical trouble.Furthermore, the simplified structure makes it easier to ensure the sealing of the swing drive mechanism, thereby improving durability in the washing area, which can be adversely affected by the atmosphere in the washing area being deteriorated by the scattering of washing water and muddy dirt.

[0034] (4) It is preferable that the steel material to be cleaned is installed with a slope that is higher on the upstream side and lower on the downstream side, with the direction of the cleaning water flowing determined, and the oscillating nozzle oscillates at a certain angle from the upstream side to the downstream side to generate a flow of cleaning water for cleaning, thereby enabling efficient cleaning work while washing away dirt that has peeled off from the surface of the steel material to be cleaned downstream with the cleaning water.

[0035] (5) A steel material placement section is provided where multiple steel materials can be laid out, and the laid-out steel materials are cleaned with a swinging nozzle while the cleaning machine is moved by a horizontal movement means in the longitudinal direction of the steel materials and in a direction perpendicular to the longitudinal direction, thereby enabling efficient cleaning of multiple steel materials at once.

[0036] (6) The cleaning machine used in the steel cleaning equipment can efficiently clean a large number of steel pieces laid out evenly by combining a fixed nozzle and a swinging nozzle.

[0037] (7) In addition to the oscillating nozzle, the unit is equipped with a fixed nozzle that maintains a constant height relative to the steel material during cleaning. This allows for a unidirectional flow of cleaning water while also being able to deal with a wide range of issues, including localized, stubborn dirt, resulting in stable cleaning performance.

[0038] (8) By providing a means for adjusting the height of the washer, it can be easily adapted to steel products of various sizes and can also be adapted to the inclination of the direction of the flow of the washing water on the steel products. [Brief explanation of the drawings]

[0039] [Figure 1] 1 shows the operation of the oscillating nozzle and counterweight in one embodiment of the steel cleaning device of the present invention, where (a) and (b) are a plan view and a side view showing the limit turning point, (c) is a side view when the oscillating nozzle moves downward, (d) and (e) are a plan view and a side view showing the limit turning point, and (f) is a side view when the oscillating nozzle moves forward. [Figure 2] This is an enlarged plan view of FIG. 1(a) illustrating the direction in which the force acts. [Figure 3] FIG. 2 shows an embodiment different from that shown in FIG. 1, and is a plan view showing a case where one swing nozzle is used. [Figure 4] This shows the operation of the swing nozzle and counterweight in an embodiment different from that shown in Figure 1, where (a) and (b) are a plan view and a side view showing the starting limit turning point, (c) is a side view when the swing nozzle moves downward, (d) and (e) are a plan view and a side view showing the ending limit turning point, and (f) is a side view when the swing nozzle moves forward. [Figure 5] 5A and 5B show a cleaning machine 10 in the case where a fixed nozzle is provided in the steel material cleaning device of the embodiment of FIG. 4, where (a) is a side view and (b) is a front view. [Figure 6] 1 is a plan view showing the overall structure of a steel material cleaning apparatus according to the present invention. [Figure 7] FIG. 7 is a front view of the embodiment of FIG. 6. [Figure 8] FIG. 10 is a plan view showing an embodiment in which a torsional load is generated. DETAILED DESCRIPTION OF THE INVENTION

[0040] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the following embodiments.

[0041] Figure 1 shows one embodiment of the steel cleaning device 1 of the present invention, showing the operation of the swing nozzle 30 and counterweight 40, where (a) and (b) are a plan view and a side view showing the starting turning point, (c) is a side view of the swing nozzle moving downward, (d) and (e) are a plan view and a side view showing the ending turning point, and (f) is a side view of the swing nozzle moving forward. Figure 2 is an enlarged plan view of Figure 1(a).

[0042] The thin arrows in the figure indicate the direction of operation of the steel material cleaning device 1 of the present invention. The black arrows indicate the direction of the force generated by the inertial force of the swinging nozzle 30 only in the horizontal direction, and the white arrows indicate the direction of the force generated by the inertial force of the counterweight 40 only in the horizontal direction.

[0043] 1(a) and (b) show the starting turning point, where the swing nozzle 30 is raised to its forwardmost position and the counterweight 40 is at its rearmost position. The nozzle swing link 31 and counterweight swing link 41 are horizontal, sandwiching the swing drive shaft 17 and swing drive motor 16, and in the side view of (b), the nozzle swing link 31 and counterweight swing link 41 are aligned in a straight line. The nozzle swing lever 33 is provided above the nozzle swing link 31, and the counterweight swing lever 43 is provided above the counterweight swing link 41.

[0044] 1(c) shows the second stage in which the swing nozzle 30 moves slightly backward and the counterweight 40 moves slightly forward. At this time, the rotation of the swing drive shaft 17 causes one end of the nozzle swing link 31 to move downward, which in turn pulls down the nozzle swing lever 33 connected to it, causing the nozzle swing arm 32 to swing backward.

[0045] In addition, the front side of the counterweight swing link 41 rises slightly, the lower end of the counterweight swing lever 43 moves slightly forward, and in conjunction with this, the counterweight swing arm 42 swings forward, causing the counterweight 40 to move forward.

[0046] 1(d) and (e) show the third stage, which is the turning point at which the swing nozzle 30 is lowered to the rear and the counterweight 40 is at its most forward position. As the swing drive shaft 17 has rotated from the state shown in FIG. 1(c), the nozzle swing link 31 and counterweight swing link 41 are horizontal, sandwiching the swing drive shaft 17 and swing drive motor 16, and in the side view shown in (e), the nozzle swing link 31 and counterweight swing link 41 are in a straight line.

[0047] When the swing drive shaft 17 rotates and the nozzle swing link 31 becomes horizontal, the lower part of the nozzle swing lever 33 moves backward, causing the nozzle swing arm 32 to move backward with the nozzle swing fulcrum shaft 34 as a fulcrum.

[0048] At the same time, the counterweight swing link 41 also becomes horizontal, and the lower part of the counterweight swing lever 43 is pushed forward with the counterweight swing fulcrum shaft 44 as the fulcrum, causing the counterweight swing arm 42 to swing forward and the counterweight 40 to move forward.

[0049] 1(f) shows the fourth stage, in which the swing nozzle 30 is raised slightly forward and the counterweight 40 is lowered slightly backward. At this time, due to the rotation of the swing drive shaft 17, one end of the nozzle swing link 31 on the swing drive shaft 17 side is lowered, the lower part of the nozzle swing lever 33 connected to the other end of the nozzle swing link 31 is pulled down forward, and the nozzle swing arm 32 swings forward.

[0050] Furthermore, one end of the counterweight swing link 41 on the swing drive shaft 17 side is raised, and the other end of the counterweight swing link 41 connected to the counterweight swing lever 43 is pushed slightly downward and rearward, causing the lower end of the counterweight swing lever 43 to move slightly rearward, and in conjunction with this, the counterweight swing arm 42 swings rearward, causing the counterweight 40 to move rearward. The structure repeats the above first to fourth stages.

[0051] In the state shown in Figures 1(a) and 1(b), the offset relationship of the loads acting on each axis is (a1 + a2) - (b1 + b2), and (A) - (B) in the front-to-back direction, suppressing recoil. The swing nozzle 30 and the counterweight 40 are arranged so that the inertial force of the other is not eccentric in the swing axis direction relative to the inertial force of the other, preventing the occurrence of torsional loads due to the eccentric relationship between the swing nozzle 30 and the counterweight 40 as shown in Figure 8.

[0052] In the embodiment of FIG. 1, as shown in FIG. 2, when the state is as shown in FIG. 1(a)(b) (or as shown in FIG. 1(d)(e)), an AB load occurs within a plane, causing a torsional load around the vertical axis at the center of the oscillating drive shaft 17, which is a cause of torsional load generation that will be solved in an embodiment different from FIG. 1 shown in FIG. 4 described later.

[0053] 3 shows an embodiment different from that shown in FIG. 1, and is a plan view showing a case where one swing nozzle 30 is used. In the case of FIG. 3, one swing nozzle 30 is provided in the front, and a counterweight swing fulcrum shaft 44 is provided behind the swing drive motor 16, so that two counterweights 40 are provided.

[0054] In the steel cleaning equipment 1 of the present invention, the oscillating nozzles 30 and counterweights 40 (oscillating bodies) arranged on each oscillating shaft are configured so that the inertial forces of the left and right oscillating bodies are equal across the center of the maximum span of the oscillating body on the oscillating shaft (the center of the equipment in this figure), thereby avoiding the occurrence of torsional loads within a plane and reducing the burden on the structure. Also, as shown in Figure 3, the positional relationship between the oscillating nozzles 30 and counterweights 40 may be reversed, and multiple oscillating nozzles 30 and counterweights 40 may be arranged as long as left and right balance is maintained.

[0055] 4 shows an embodiment of the steel material cleaning apparatus 1 of the present invention that is different from that shown in FIG. 1, and illustrates the operation of the swing nozzle 30 and the counterweight 40. (a) and (b) are a plan view and a side view showing the limit turning point, (c) is a side view when the swing nozzle 30 has moved downward, (d) and (e) are a plan view and a side view showing the limit turning point, and (f) is a side view when the swing nozzle 30 has moved forward.

[0056] As in Fig. 1, the thin arrows in Fig. 4 indicate the direction of operation of the steel material cleaning apparatus 1 of the present invention. Furthermore, the black arrows indicate the direction of the force generated by the inertial force of the swinging nozzle 30 only in the horizontal direction, and the white arrows indicate the direction of the force generated by the inertial force of the counterweight 40 only in the horizontal direction.

[0057] 4(a) and (b) show the starting turning point, where the swing nozzle 30 is raised to the most forward position and the counterweight 40 is at the most rearward position. The nozzle swing link 31 and counterweight swing link 41 are horizontal, sandwiching the swing drive shaft 17 and swing drive motor 16, and in the side view of (b), the nozzle swing link 31 and counterweight swing link 41 are in a straight line.

[0058] At this time, as shown by the black arrow A and the white arrow B in Figure 4(a), the AB loads act in the same direction backward, eliminating the torsional load caused by the AB loads shown in Figure 2. In addition, the offset relationship of the loads generated on each axis is (a1 + a2 + b1 + b2) - (A + B), which prevents the generation of torsional loads on a plane and suppresses reaction to the device support structure.

[0059] In a configuration in which the load directions of the black arrow A and the white arrow B act in opposite directions at the front and rear, the torsional load generated around the vertical axis at the center of the oscillating drive shaft 17 increases as the distance between the black arrow A and the white arrow B, i.e., the distance between the nozzle drive rotating arm and the counterweight drive rotating arm, increases, and the load on the support structure increases.

[0060] By configuring the load directions of the black arrow A and the white arrow B to act in the same direction at the front and back so as to prevent the generation of torsional load, the device can be configured more rationally without problems caused by torsional load even if the swing drive motor 16 is placed between the nozzle drive rotating arm and the counterweight drive rotating arm and the spacing between the rotating arms is widened.

[0061] 4(c) shows the second stage in which the swing nozzle 30 moves slightly backward and the counterweight 40 moves slightly forward. At this time, the rotation of the swing drive shaft 17 causes one end of the nozzle swing link 31 to rise, which in turn pulls up the nozzle swing lever 33 connected to it, causing the nozzle swing arm 32 to swing backward.

[0062] In addition, the counterweight swing link 41 is pushed slightly forward, causing the lower end of the counterweight swing lever 43 to move slightly forward, and in conjunction with this, the counterweight swing arm 42 swings forward, causing the counterweight 40 to move forward.

[0063] 4(d) and (e) show the third stage, which is the turning point of the inclination limit, where the swing nozzle 30 is at the rearmost position and the counterweight 40 is at the forwardmost position. As a result of the swing drive shaft 17 rotating from the state shown in FIG. 4(c), the nozzle swing link 31 and the counterweight swing link 41 are horizontal, sandwiching the swing drive shaft 17 and the swing drive motor 16, and in the side view shown in (e), the nozzle swing link 31 and the counterweight swing link 41 are in a straight line.

[0064] When the swing drive shaft 17 rotates and the nozzle swing link 31 becomes horizontal, the upper part of the nozzle swing lever 33 moves forward, causing the nozzle swing arm 32 to move backward with the nozzle swing fulcrum shaft 34 as a fulcrum.

[0065] At the same time, the counterweight swing link 41 also becomes horizontal, and the counterweight swing lever 43 is pushed forward with the counterweight swing fulcrum shaft 44 as the fulcrum, causing the counterweight swing arm 42 to swing forward and the counterweight 40 to move forward.

[0066] 4(f) shows the fourth stage in which the swing nozzle 30 is raised slightly forward and the counterweight 40 is lowered slightly backward. At this time, the rotation of the swing drive shaft 17 pushes the nozzle swing link 31 backward, and the upper part of the nozzle swing lever 33 connected to it is pushed backward, causing the nozzle swing arm 32 to swing forward.

[0067] Furthermore, the portion of the counterweight swing link 41 connected to the counterweight swing lever 43 is pushed slightly downward and rearward, causing the lower end of the counterweight swing lever 43 to move slightly rearward, and in conjunction with this, the counterweight swing arm 42 swings rearward, causing the counterweight 40 to move rearward. The above first to fourth stages are repeated.

[0068] In the embodiment shown in Figure 4, the swing nozzle 30 and the counterweight 40 are arranged so that the inertial force of either one is not eccentric in the swing axis direction relative to the inertial force of the other. Furthermore, with respect to the swing fulcrum axis of either one of the swing nozzle 30 and the counterweight 40, the other swing fulcrum axis is arranged at an arbitrary point radially away from the swing fulcrum axis, for example, on the opposite side of a line connecting the front and rear turning points of the swing locus of the center point of the axis pivoting the swing lever and the swing link. This ensures that the reaction forces of the inertial forces of the swing nozzle 30 and the counterweight 40 act in the same direction relative to the radial direction of the drive shaft, preventing the generation of a torsional load that would rotate the drive shaft radially within a plane. Furthermore, the reaction forces acting on the drive shaft and the reaction forces acting on each swing fulcrum axis are offset, suppressing the reaction of the entire support structure of the steel cleaning apparatus.

[0069] FIG. 5 shows an embodiment of the cleaner 10 in which the fixed nozzle 20 is provided in the embodiment of FIG. 4, where (a) is a side view and (b) is a front view.

[0070] A swivel device 14 and a swivel motor 15 are provided below the lateral movement means 6, making it possible to easily rotate the orientation of the washer 10. A lifting device 11 is provided below the swivel device 14, and is equipped with a lifting handle 12 that allows the washer 10 to be manually raised and lowered. By providing the lifting device 11 to the washer 10, it can accommodate steel materials of various sizes.

[0071] Two fixed nozzles 20 are provided at the outermost position at the bottom of the washer 10. The fixed nozzles 20 can clean steel materials at a fixed angle. Two oscillating nozzles 30 are provided inside the fixed nozzles 20. In addition to the oscillating nozzles 30, the fixed nozzles 20, which clean steel materials while maintaining a constant height, generate a unidirectional flow of cleaning water, and can handle a wide range of stains, including those that are localized and stubborn, resulting in stable cleaning performance.

[0072] The swing nozzle 30 is provided at the tip of a nozzle swing arm 32, and the nozzle swing arm 32 and a nozzle swing lever 33 are connected via a nozzle swing fulcrum shaft 34. The upper end of the nozzle swing lever 33 is connected to one end of a nozzle swing link 31, and the other end of the nozzle swing link 31 is connected to a nozzle drive rotation arm 35 which is rotated by a swing drive motor 16 via a swing drive shaft 17.

[0073] The counterweight 40 is provided at the tip of a counterweight swing arm 42, and the counterweight swing arm 42 and a counterweight swing lever 43 are connected via a counterweight swing fulcrum shaft 44. The lower end of the counterweight swing lever 43 is connected to one end of a counterweight swing link 41, and the other end of the counterweight swing link 41 is connected to a counterweight drive rotation arm 45 which is rotated by a swing drive motor 16 via a swing drive shaft 17.

[0074] The rotational drive of the nozzle drive rotating arm 35 and the counterweight drive rotating arm 45 may be achieved by directly connecting the swing drive motor 16 to the swing drive shaft 17, or the drive may be transmitted by connecting the swing drive shaft 17 and the swing drive motor 16 via a chain or gears.

[0075] In the embodiment shown in each drawing, a hollow shaft type swing drive motor 16 is arranged between the nozzle drive rotation arm 35 and the counterweight drive rotation arm 45, and the swing drive shaft 17 is inserted and directly connected to the swing drive motor 16 to rotate the nozzle drive rotation arm 35 and the counterweight drive rotation arm 45.

[0076] By directly driving the swing drive shaft 17 with the swing drive motor 16, the drive mechanism can be simplified, the effort required to adjust the chain tension and the risk of damage or wear to the device components due to the reaction of the operation or a harsh environment with cleaning water or muddy dirt can be reduced, and the robustness of the device can be improved with a more rational configuration.

[0077] The nozzle swing link 31 and the counterweight swing link 41 are each connected to a swing drive shaft 17 that rotates the swing nozzle 30 and the counterweight 40 using a single swing drive motor 16, and convert the rotational motion of the swing drive shaft 17 into reciprocating motion, causing the swing nozzle 30 and the counterweight 40 to swing back and forth in opposite directions along the cleaning direction.

[0078] The relative positions of the fulcrum of the swinging of the swing nozzle 30 and counterweight 40, the center of rotation of the swing drive shaft 17, and the respective connecting fulcrums of the nozzle swing link 31 and counterweight swing link 41 are configured so that the timing of the forward and backward turns (forward and backward limits) of the reciprocating motion of the swing nozzle 30 and counterweight 40 is the same, thereby making it possible to cancel out the recoil generated by the swinging.

[0079] The oscillating nozzle 30 is provided with a counterweight 40 that oscillates in a direction opposite to that of the oscillating nozzle 30, so that the force generated by the inertial force of the oscillating nozzle 30 and the force generated by the inertial force of the counterweight 40 are cancelled out. Therefore, the counterweight 40 oscillates in a direction opposite to that of the oscillating nozzle 30, canceling out the recoil of the oscillating nozzle 30 and protecting the steel cleaning equipment 1 from the impact of the recoil.

[0080] FIG. 6 is a plan view showing the overall structure of a steel cleaning apparatus 1 of the present invention, and FIG. 7 is a front view. A plurality of steel materials 50 (objects to be cleaned) are arranged in parallel in a steel material placement section 51. A portal frame 2 is formed as one of the horizontal movement means of the cleaning machine 10. The portal frame 2 includes support columns 3 on both sides of the steel material placement section 51 and beam members 4 installed between the support columns 3. A vertical movement means 5 is provided below the support columns 3. The vertical movement means 5 is placed on rail members 5b installed on both sides of the steel material placement section along the longitudinal direction of the steel materials, with a length exceeding the length of the steel materials 50 arranged in the steel material placement section 51, via running rollers (not shown) driven by a vertical movement motor 5a provided in the vertical movement means 5, and moves the portal frame 2 in a direction perpendicular to the beam members 4.

[0081] Furthermore, a lateral movement means 6 is placed on the beam members 4 of the portal frame 2 via traveling rollers 6b, and a cleaning machine 10 is suspended from the lateral movement means 6. The lateral movement means 6 is provided with a lateral movement motor 6a that drives a sprocket 6d that engages with a chain rack 6c fixed to the beam members 4 along the movement direction of the lateral movement means 6 over a length that exceeds the movement range of the lateral movement means 6, and moves the cleaning machine 10 along the beam members 4.

[0082] The washer 10 is equipped with a swinging nozzle 30 and a fixed nozzle 20. The swinging nozzle 30 swings at a fixed angle to generate a flow of cleaning water, while the fixed nozzle 20 performs cleaning while maintaining a constant height relative to the steel material 50, making it possible to deal with a wide range of stains, including localized and stubborn dirt, and to perform efficient cleaning.

[0083] When the steel material 50 is a steel sheet pile 50a, for example, it is installed with the concave portion facing up, and after cleaning, the steel sheet pile 50a is turned over so that the convex surface faces up as shown in the figure, and then cleaned again. When cleaning H-shaped steel 50b, first, the steel sheet piles are laid out so that one concave portion faces up, and then after cleaning one side, the H-shaped steel 50b is turned over so that the other concave portion faces up, and then cleaned again. [Explanation of symbols]

[0084] 1...Steel cleaning equipment 2...Gate frame 3…Strut 4...Beam member 5...Vertical movement means 5a...Vertical movement motor 5b...Rail member 6...Lateral movement means 6a...Lateral movement motor 6b...Travel roller 6c...Chain rack 6d…Sprocket 10...Washing machine 11...Lifting device 12...Lifting handle 13...Lift motor 14...Swivel device 15...Slewing motor 16...Oscillating drive motor 17...Oscillating drive shaft 20...Fixed nozzle 30...Swinging nozzle 31...Nozzle swing link 32...Nozzle swing arm 33...Nozzle swing lever 34...Nozzle swing fulcrum axis 35...Nozzle drive rotating arm 40...Counterweight 41...Counterweight swing link 42...Counterweight swing arm 43...Counterweight swing lever 44...Counterweight swing fulcrum axis 45...Counterweight-driven rotating arm 50…Steel material (object to be cleaned) 50a…Steel sheet pile 50b…H-beam steel 51...Steel installation part

Claims

1. A steel material cleaning device comprising a cleaning machine that sprays cleaning water for cleaning steel materials, and relative movement means that moves the relative positions of the steel materials and the cleaning machine to any position, The cleaning machine includes one or more swinging nozzles that spray cleaning water while swinging toward the surface of the steel material to be cleaned, and one or more counterweights that swing in a direction opposite to the swinging nozzle relative to the swinging nozzle, A steel cleaning device characterized in that the oscillating nozzle and the counterweight are arranged in a positional relationship such that the inertial force of either the oscillating nozzle or the counterweight is not eccentric relative to the inertial force of the other in the oscillating axis direction.

2. A steel material cleaning device comprising a cleaning machine that sprays cleaning water for cleaning steel materials, and relative movement means that moves the relative positions of the steel materials and the cleaning machine to any position, The cleaning machine includes one or more swinging nozzles that spray cleaning water while swinging toward the surface of the steel material to be cleaned, and one or more counterweights that swing in a direction opposite to the swinging nozzle relative to the swinging nozzle, A steel cleaning device characterized in that, with respect to each swing fulcrum shaft linked to a swing drive shaft via a swing link and a swing lever, the other swing fulcrum shaft is disposed on the opposite side of the swing fulcrum shaft of either the swing nozzle or the counterweight across a line connecting swing turning points at predetermined points radially away from the swing fulcrum shaft.

3. A steel material cleaning device comprising a cleaning machine that sprays cleaning water for cleaning steel materials, and relative movement means that moves the relative positions of the steel materials and the cleaning machine to any position, The cleaning machine includes one or more swinging nozzles that spray cleaning water while swinging toward the surface of the steel material to be cleaned, and one or more counterweights that swing in a direction opposite to the swinging nozzle relative to the swinging nozzle, a nozzle swing fulcrum shaft and a counterweight swing fulcrum shaft, which are fulcrums for the swinging of the swing nozzle and the counterweight, respectively, are connected to a swing drive shaft, which is driven to rotate by a swing drive motor, by a link mechanism via a nozzle drive rotation arm and a counterweight drive rotation arm, which are arranged to sandwich the swing drive motor.

4. In the steel material cleaning apparatus according to any one of claims 1 to 3, a steel material installation section is provided in which a plurality of the steel materials are laid out, the relative movement means is a horizontal movement means including a lateral movement means for reciprocating the cleaning machine in a direction perpendicular to the longitudinal direction of the steel material, and a vertical movement means for moving the cleaning machine in the longitudinal direction of the steel material, The cleaning machine is a steel cleaning device characterized by comprising one or more fixed nozzles that spray cleaning water toward the surfaces to be cleaned of the steel materials laid out in the steel material installation area, and one or more oscillating nozzles that spray cleaning water while oscillating in an arc-shaped trajectory within a plane in a direction intersecting the surfaces to be cleaned.

5. 4. A steel material cleaning apparatus according to claim 1, wherein the cleaning machine is provided with a cleaning machine height adjustment means for adjusting the height in the up-down direction relative to the relative movement means.

6. 4. The steel material cleaning apparatus according to claim 1, wherein the cleaning machine is provided with a rotating means for rotating the entire cleaning machine around an axis.

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