JP5809488B2 - Lance operation assist device - Google Patents

Description

  The present invention relates to a lance operation assisting device that is used for repair work in which an operator operates the lance by supporting the lance at a single tiltable position.

  When repairing the furnace wall of the coke oven by spraying the thermal spray material, the lance that sprays the thermal spray material is supported at one point in a tiltable manner, and the lance is built in from the repair work that is manually operated by tilting the lance. There are various types of repair work using a repair device that automatically moves the lance up, down, left and right. The lance itself can be expanded or contracted, and the difference in structure or configuration such as single tube to triple tube, etc., but in all cases, the lance itself has a total length of several meters (the one that expands and contracts is in an expanded state). An injection nozzle is provided. Such a long lance is used so that most of the lance body is inserted into the coke oven from the tip end from which the injection nozzle protrudes, and the sprayed material and reaction gas supplied from the base end are blown out from the injection nozzle. Is done.

  In the repair device disclosed in Patent Document 1, a support mechanism (9) is provided on a moving base (8) mounted on a carriage (7) moving on a work floor (101), and a lance body (base tube) is provided on the supporting mechanism. 1) and a tilting mechanism (11) for tilting (tilting) the lance body so that it can be raised and lowered. The lance is a telescopic type in which the first-stage lance (2) to the third lance (4) and the lance head (5) enter and exit from the lance body. The injection nozzle (nozzle 21) is provided in the lance head. The tilting mechanism is an electric cylinder or a hydraulic cylinder. The tube is fixed to the moving base, and the tip of the rod that expands and contracts upward from the tube is pivotally attached to the rear of the fulcrum of the rod body (Patent Documents 1 and [ [FIG. 1]).

JP 2001-181641 A

  Since the repair device disclosed in Patent Document 1 tilts the lance with the tilting mechanism and can adjust the height of the injection nozzle provided at the tip (lance head), the operation of the lance that adjusts the height of the injection nozzle. It does not require the labor of an operator. In this way, it seems preferable to automate the operation of the lance more and more, but as the automation proceeds, the repair device becomes inevitably larger and more expensive, which makes it difficult to introduce it into various coke ovens. Come. In addition, it is desired that the operator can finely adjust the height of the injection nozzle by finely controlling the tilt angle of the lance. From now on, the repair work which an operator operates by supporting one point of the lance in a tiltable manner is preferred and used.

  In the repair work that supports the lance at one point in a tiltable manner, the fulcrum is given as a dedicated support tool placed on the work platform or as a handrail for an aerial work platform. In any case, the fulcrum provided to the lance is provided so as to be biased toward the base end portion from the relationship of inserting most of the lance main body into the coke oven from the distal end portion. For this reason, the moment from the said front-end | tip part to a fulcrum becomes large, and there exists a problem that the effort which tilts an operator's lance becomes large. In this respect, if the lance is short or a single tube, the moment will not increase so much, but if the lance becomes long, or if a double tube or triple tube considering cooling is used, the worker due to the moment Cannot be ignored.

  If the moment increases due to the lance becoming long, double pipe or triple pipe, it becomes difficult to bring the injection nozzle provided at the tip of the lance closer to the target furnace wall and stop it properly. There arises a problem that the advantage of finely adjusting the height of the nozzle is impaired. In addition, if you try to operate the lance finely against the moment, the lance will fluctuate in an attempt to forcibly suppress the excessive tilt of the lance, or the tip to the fulcrum will vibrate, allowing stable operation of the lance. This also causes a problem that the advantage of finely adjusting the height of the injection nozzle is impaired.

  As described above, in the repair work in which the operator operates the lance while supporting the lance so that the lance can be tilted, the moment applied to the lance causes various problems. Considering the current situation where the lance must be long, the moment itself cannot be eliminated. Therefore, in order to solve the problems caused by the long lance moment, the lance is supported at one point so that the lance can be tilted and the operator operates the lance to assist the operation of the lance. When lifting between the fulcrum of the lance to lower it, the momentum applied to the lance is reduced, and when pushing down between the lance of the lance to lift the tip of the lance, In order to develop a lance operation assisting device that can compensate for the force required to push down, we examined it.

What was developed as a result of the study was constructed by connecting the lower end of the cylinder that protrudes the rod upward from the tube to the anchor that the operator steps on the work scaffold and is connected in a posture by a connecting member, The cylinder is provided with an engaging portion on the rod that engages at least from above with the lance, a regulator is provided at the front supply / discharge port of the front chamber above the tube, and the front supply / discharge port is connected to the front chamber via the regulator. It is a lance operation assisting device that supplies and discharges the pressure medium and naturally supplies and discharges the pressurized medium to and from the rear supply / discharge port of the rear chamber below the tube. The work platform means a platform on which the operator who operates the lance stands, and it is sufficient if there is a plane on which the operator can stably step on the anchor. For example, a work floor facing a coke oven kiln or an aerial work platform is there.

  The lance operation assisting device of the present invention realizes the reduction of the lance's momentum and the compensation of the force when the lance is tilted by a rod of a cylinder that is extended or retracted by a regulator automatically supplying and discharging a pressurized medium. The lance operation assisting device is an engaging portion provided on a rod that is fixed on the work scaffold by an operator stepping on the anchor and that extends or retracts upward from a cylinder that is supported in a posture with respect to the anchor. Is engaged with the lance from above at least between the fulcrum and the base end (including the base end, hereinafter the same). The engaging portion may be constituted by a clamp that holds the lance as long as it does not prevent the lance from tilting. The operator may stand between the fulcrum and the cylinder, or may stand near the base end from the cylinder, that is, with the cylinder sandwiched between the fulcrum.

  As the cylinder, either a hydraulic cylinder or a pneumatic cylinder can be used regardless of the pressurized medium. However, since air (compressed air) is supplied as a pressurized medium in factories or the like, a pneumatic cylinder (air cylinder) is used. Is preferred. The hydraulic cylinder is a pressurized medium for both supply and discharge. For example, the air cylinder supplies and discharges compressed air that pushes the piston to and from the front chamber, and supplies and discharges atmospheric air (unpressurized air) to and from the rear chamber. From this point on, regarding the air cylinder, the atmosphere supplied to and discharged from the rear chamber (unpressurized air) is also regarded as a kind of the pressurized medium of the present invention. In addition to being provided directly at the pre-feed / discharge port of the tube, the regulator may be interposed in the supply path of the pressurized medium connected to the pre-feed / discharge port. Natural supply / discharge means that the rear supply / discharge port of the rear chamber of the tube is opened, and the pressurized medium can freely flow in and out. The cylinder changes its posture (inclination in the vertical plane or horizontal plane) with respect to the anchor by the action of the connecting member while extending or shortening the rod according to the tilt of the lance.

  The connecting member is one of flexible members (wires, belts, etc.) or bending members (chains, shackles, universal joints, etc.) that can change the posture of the tubes with respect to the anchors. One or a combination. The engaging portion is a connecting member that allows the lance and the rod to be detachably attached. The engaging portion may be provided in the middle of the rod, but is usually provided at the tip of the rod and may be engaged at least with the lifting lance from above. In addition, a clamp that holds the lance may be used as long as the tilt of the lance is not prevented.

  The anchor is a part that prevents the cylinder from floating through the connecting member when the anchor is placed on the work scaffold and is stepped by the worker. It doesn't matter. From this, when the heat resistance is required, the anchor used in the present invention is, of course, composed of a metal plate or a metal pipe, but when the heat resistance is not so much required (the work floor and the high place work platform are not so much). It may be a resin plate, a resin pipe, a wooden flat plate or a bar. Further, as will be described later, as long as the anchor is composed of two members, a metal plate or metal pipe or a resin plate or resin pipe having heat resistance may be assembled.

  The operator sets a set pressure in the regulator that supplies and discharges the pressurized medium, and starts repair work. The set pressure of the regulator is the pressure of the supply destination (secondary side) with respect to the supply side (primary side) of the pressurized medium, and corresponds to the pressure of the pressurized medium in the front chamber of the cylinder in the present invention. That is, when the pressure of the pressurized medium in the front chamber of the cylinder exceeds the set pressure, the pressurized medium in the front chamber is discharged through the regulator, and conversely, when the pressure of the pressurized medium in the front chamber falls below the set pressure, A pressurized medium is supplied to the front chamber. Accordingly, the cylinder expands and contracts the rod so that the pressure of the pressurized medium in the front chamber becomes the set pressure, and suppresses the lance posture change exceeding the expansion and contraction of the rod.

  When lowering the tip of the lance, the operator lifts the lance from the fulcrum to the base end. Since the cylinder has the engaging portion engaged with the lance at least from above, the rod is pulled up by the lance to raise the piston and compress the pressurized medium in the front chamber. When the pressurized medium in the front chamber thus compressed exceeds the set pressure of the regulator, it is discharged from the front chamber through the regulator. At the same time, the pressurized medium flows into the rear chamber, but the inflow of the pressurized medium into the rear chamber does not particularly hinder the piston from rising. However, the discharge of the pressurized medium from the front chamber becomes a resistance when the piston moves up. Thus, the discharge of the pressurized medium from the anterior chamber through the regulator becomes a resistance against the rise of the lance, and the momentum applied to the lance is reduced when it is lifted from the fulcrum of the lance to the base end portion.

  “The discharge of the pressurized medium becomes a resistance to the rise of the lance” means that the extension of the rod is delayed as compared with the rise of the lance that pulls up the rod. In this way, when the extension of the rod is delayed compared to the raising of the lance, the connecting member connecting the cylinder and the anchor remains in tension, preventing the anchor that is stepped on by the operator from being lifted along the lance. it can. At this time, the load applied to the anchor is not the force that lifts the lance but the force that opposes the moment proportional to the length from the tip of the lance to the fulcrum, and the operator steps on the anchor before operating the lance. As long as the lance can be supported stably, the anchor can be pressed down with just the force that the operator steps on.

  When raising the tip of the lance, the operator pushes down between the base end from the fulcrum of the lance. If the engaging portion is only engaged with the lance from above, the load that the base end portion was trying to pull up the rod from the fulcrum of the lance is reduced, so the rod is shortened according to the reduction in the load. The piston is lowered to expand the pressurized medium in the front chamber. If the engaging part holds the lance, the rod is shortened together with the base end part from the fulcrum of the lance, the piston is lowered, and the pressurized medium in the front chamber is expanded. When the expanded pressure medium in the front chamber falls below the set pressure of the regulator, a new pressure medium is supplied from an external supply source through the regulator. At the same time, the pressurized medium flows out from the rear chamber, but the outflow from the rear chamber of the pressurized medium does not particularly disturb the lowering of the piston. The inflow of the pressurized medium into the front chamber becomes a force that promotes the lowering of the piston. Thus, the pressurized medium flowing into the anterior chamber through the regulator helps the rod to contract and compensates for the force required to push down between the lance fulcrum and the proximal end.

  When the rod is shortened by pushing down from the lance fulcrum to the base end, the pressure medium is supplied to the front chamber to forcibly push down the piston, so the rod shrinks without delaying the lance descent. . In this way, when the rod contraction follows without delaying the pushing of the lance, the connecting member connecting the cylinder and the anchor remains in tension, and the engaging portion is released from the lance and the base end portion from the lance fulcrum. There is no possibility of damaging the function of supplementing the necessary force when pushing down the gap. At this time, the load applied to the anchor is not the force that lifts the lance but the force that opposes the moment proportional to the length from the tip of the lance to the fulcrum, and the operator steps on the anchor before operating the lance. As long as the lance can be supported stably, the anchor can be pressed down with just the force that the operator steps on.

  As long as the anchor can be placed on a work scaffold and stepped on by an operator, and the cylinder can be fixed in a freely positionable manner via the connecting member, the anchor or the structure may be used. However, the anchor intersects the main body plate and the main body plate. When the auxiliary part is integrated, an operator who opens the body diagonally with respect to the lance may step on the main part with the right foot and step on the auxiliary part with the left foot according to the natural opening of the foot. it can. Further, if the anchor unit is integrated with the auxiliary part orthogonal to the main body part at the end of the main body part, the main body part is lifted upward with the auxiliary part as an axis, and the auxiliary part is slid and lifted. The part can be swung horizontally, that is, the direction of the anchor can be easily changed.

  Even when the anchor is composed of a single member, or as described above, it is composed of two members, the main body part and the auxiliary part, the lower surface facing the work scaffold of each member is a flat surface, and the opposite upper surface is A convex surface is desirable. The worker needs to keep stepping on the loaded anchor during the repair work. The lower surface of the anchor, which is a flat surface, allows the anchor to be stably placed on the work scaffold. In addition, the upper surface of the anchor that is a convex surface can be pressed by, for example, an operator touching the heel or toe to the work platform and tilting the foot around the heel or toe, or pressing the entire foot so that the arch is straddling This makes it easier for the operator to step on the anchor for a long time. If the upper surface of the anchor is a convex surface, it may have a step or may be a smooth surface as a whole.

  The lance operation assisting device of the present invention works by supporting the lance at a single point in a tiltable manner by automatically feeding and discharging a pressurized medium by a regulator to a front chamber of a cylinder which is fixed in a position to be fixed to the work scaffold by an anchor. When a person performs repair work to operate the lance, the momentum applied to the lance is lifted from the fulcrum to lower the tip, and the distance from the fulcrum to the base is pushed down to raise the tip. Compensating for the force required to push down the lance, the labor of the operator who operates the lance is greatly reduced. In addition, since the cylinder always engages the engagement portion of the rod with the lance at least from above, it is possible to suppress the lifting between the fulcrum of the lance and the base end due to the moment, and the operator can tilt the lance finely. This brings about an effect that makes the operation easier.

  The anchor that fixes the position of the cylinder in a posture-free manner is configured by intersecting the main body part and the auxiliary part that connect the connecting member, thereby increasing the number of parts that the operator can step on and increasing the degree of freedom in the posture of the worker who steps on the anchor. For example, it is possible to allow the operator to take a posture that facilitates the tilting operation of the lance. In addition, the anchor has a flat bottom surface and a convex top surface, so that the anchor can be stably placed on the work scaffold and can be easily stepped on by the operator, reducing the burden on the operator who steps on the anchor. From this, if the lower surface of the main body and the auxiliary portion is a flat surface and the upper surface is a convex surface, it becomes possible to stably step on the anchor for a long time regardless of the posture of the operator.

It is a perspective view showing the structure of the lance operation assistance apparatus based on this invention. It is a perspective view showing the use condition which has arrange | positioned the lance operation assistance apparatus of this example near the base end part from the operator. It is a side view showing the state where it was assisted by the lance auxiliary device of this example, and the lance was made horizontal. It is a side view showing the state where it was assisted by the lance auxiliary device of this example, and the tip part of the lance was lowered. It is a side view showing the state where it was assisted by the lance auxiliary device of this example, and the tip part of the lance was raised. It is a perspective view showing the use condition which has arrange | positioned the lance operation assistance apparatus of this example near the fulcrum from the operator. It is a perspective view showing the use condition which steps on only an auxiliary pipe and makes an anchor turn horizontally.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. As shown in FIG. 1, for example, the lance operation assisting device 1 of the present invention is provided with a tube side ring 235 provided at the lower end portion of a tube 23 of an air cylinder (cylinder) 2 from which a rod 21 protrudes. The anchor side ring 311 provided on the anchor 3 that the operator 5 steps on and puts it on a shackle (connecting member) 4 so as to be freely positioned. The shackle 4 has degrees of freedom with respect to the tube side ring 235 and the anchor side ring 311, respectively, and ensures 2 degrees of freedom as a whole. Since the air cylinder 2 does not change its posture with respect to the anchor 3 so much, two degrees of freedom with the shackle 4 is sufficient for the anchor 3.

  The anchor 3 has a T-shape in plan view in which a long main body pipe 31 and a short auxiliary pipe 32 are orthogonal to each other. The main body pipe 31 crushes the metal pipe and gradually changes the upper surface from the open end portion toward the connection end portion with the auxiliary pipe 32 while making the open end portion a flat surface in which the upper surface and the lower surface are in close contact with each other. It is a deformed cross section in which the upper surface of the connecting end portion is inflated and the upper surface is a curved surface (convex surface) of the metal pipe as it is, and the lower surface is a flat surface. Further, the auxiliary pipe 32 has a cross-section of a semi-cylindrical shape in which the metal pipe is crushed, the upper surface is a curved surface (convex surface) as it is, and the lower surface is a flat surface. The shackle 4 is connected to an anchor side ring 311 provided on the upper surface of the open end of the main body pipe 32.

  The air cylinder 2 is provided with a regulator 24 at a front supply / exhaust port 231 (shown at a connection position of the regulator 24 in FIG. 1) of the front chamber 232 of the tube 23 (see FIG. 3 below). Compressed air (pressurized medium) Ap or air An is supplied / exhausted from the supply / exhaust port 231 to the front chamber 232, and the rear supply / exhaust port 233 of the rear chamber 234 of the tube 23 (shown at the indicated position of the lead wire in FIG. 1) And the air An is naturally supplied / exhausted from the atmosphere to the rear chamber 234 through the rear supply / exhaust port 233. The shackle 4 is connected to a tube side ring 235 provided at the lower end of the tube 23.

  The rod 21 is provided with a hook (engagement portion) 22 at the distal end portion for engaging the roller 221 having a circumferential groove having a concave cross section with the lance 6 from above. The hook 22 may be engaged with the lance 6 at least from above, so that the roller 221 may not be provided. However, as will be described later, when the space between the fulcrum 62 of the lance 6 and the base end 63 is lifted (see FIG. 4 below) or pushed down (see FIG. 5 below), the hook 22 is engaged with the lance 6. Therefore, it is preferable that the circular roller 221 that smoothly engages the circumferential groove with the lance 6 that makes the movement of the hook 22 smooth and that always tilts is engaged with the lance.

  The regulator 24 has an outlet (secondary side port) connected to the pre-supply / discharge port 231 of the tube 23 serving as a supply destination (secondary side), and a medium supply hose 25 for compressed air Ap serving as the supply side (primary side). Is connected to the inlet (primary port). The regulator 24 includes a setting knob 241 for adjusting the pressure of the compressed air Ap supplied to the front chamber 232 of the tube 23, and a pressure gauge 242 for displaying the pressure. As a result, the operator 5 turns the setting knob 241 while watching the pressure gauge 242 so that the lance 6 supported while engaging the hook 22 is stabilized in a specific posture (normally in a horizontal state). adjust. For example, in the case of a lance 6 with a double pipe specification in which the length from the tip 61 to the fulcrum 62 is 6 m, the set pressure of the regulator 24 is 0.15 MPa to 0.2 MPa.

  As shown in FIG. 2, the lance operation assisting device 1 has a base end from a fulcrum 62 of the lance 6 provided by the support tool 71, for example, with respect to the lance 6 supported at one point by the support tool 71 placed on the work scaffold 7. Arranged between the parts 63. The anchor 3 is a working scaffold in which the main pipe 31 with the open end connecting the air cylinder 2 facing the base end 63 of the lance 6 is substantially parallel to the lance 6 and the auxiliary pipe 32 is oriented to intersect the lance 6. Put on 7. The orientation of the main body pipe 31 and the auxiliary pipe 32 is arbitrary and can be set by the operator 5 according to his / her preference.

  The operator 5 steps on the auxiliary pipe 32 with the toes of the right foot 53, steps on the main body pipe 31 with the toes of the left foot, and has the right hand 51 and the left hand 52 between the fulcrum 62 and the base end portion 63 of the lance 6. The main body pipe 31 constituting the anchor 3 has its cross-sectional shape gradually changed from the open end toward the connection end, but the lower surface is a flat surface and the upper surface is a convex surface. The auxiliary pipe 32 has the same cross section at both ends, the lower surface is a flat surface, and the upper surface is a convex surface. Accordingly, the anchor 3 can be stably placed with the lower surfaces of the main body pipe 31 and the auxiliary pipe 32 in contact with the work scaffold 7. Further, the operator 5 can step on the upper surfaces of the main body pipe 31 and the auxiliary pipe 32 by grounding the heel on the work scaffold 7 and stepping on the right foot 53 and the left foot 54 with the heel as an axis.

  The air cylinder 2 engages the roller 221 of the hook 22 with the lance 6 from above between the operator 5 and the base end portion 63 of the lance 6. The lance 6 of this example is provided with a connecting portion (coupler) of a spray material and a reactive gas material supply hose (not shown) at the base end portion 63, and the roller 221 is hooked on the connecting portion, so that the hook 22 is It is possible to prevent the rearward departure from the base end portion 63. Without such a connection, the hook 22 rolls or slides on the lance 6 due to the inclination of the lance 6 and moves back and forth slightly, so that the roller 221 of the hook 22 is engaged sufficiently forward from the base end 63. You can combine them.

  The operator 5 adjusts and sets the set pressure of the regulator 24 before the repair work by the lance 6 is started. The air pressure is set against the moment from the tip 61 to the fulcrum 62 of the lance 6 as shown in FIG. 3 when the operator 5 holds the lance 6 without tilting (see FIG. 2). 2 pulls the rod 21 downward to push down from the fulcrum 62 to the base end 63 so that the horizontal lance 6 is balanced. Since the lance 6 is not inserted into the coke oven at once, but the length of insertion is gradually extended, the set pressure is set so that the lance 6 that gradually extends the insertion length is in a horizontal posture each time. Repeat adjustments and settings to balance.

  When the tip 61 of the lance 6 is lowered, the operator 5 lifts between the fulcrum 62 and the base end 63 of the lance 6 as shown in FIG. 4 (see FIG. 2). When the lance 6 tilts around the fulcrum 62, the tip 61 is greatly lowered. Thus, the operation of lifting the base end portion 63 from the fulcrum 62 of the lance 6 lowers the tip end portion 61. Since the air cylinder 2 engages the roller 221 of the hook 22 with the lance 6 from above, the piston 21 is raised by the rod 21 being pulled up with the lance 6 lifted by the operator 5, and the front chamber 232 The compressed air Ap is further compressed (illustrated by dense cross-hatching in FIG. 4).

  When the compressed air Ap of the compressed front chamber 232 exceeds the set pressure of the regulator 24, the compressed air Ap is discharged from the front chamber 232 through the regulator 24. At the same time, air An flows into the rear chamber 234 from the atmosphere, but the flow of air An into the rear chamber 234 does not particularly hinder the piston 211 from rising. However, the discharge of the compressed air Ap from the front chamber 234 becomes a resistance when the piston 211 rises. Thus, the discharge of the compressed air Ap from the front chamber 234 through the regulator 24 becomes resistance to the rise of the lance 6, and reduces the momentum applied to the lance 6 when lifting between the fulcrum 62 and the base end portion 63 of the lance 6.

  If the extension of the rod 21 is delayed compared to the lifting of the lance 6, the shackle 4 connecting the air cylinder 2 and the anchor 3 remains engaged with both the tube side ring 235 and the anchor side ring 311. It is possible to prevent the anchor 3 stepped on by the worker 5 from being lifted along the lance 6. At this time, the load applied to the anchor 3 is not a force that lifts the lance 6 but a force that opposes a moment proportional to the length from the distal end portion 61 to the fulcrum 62 of the lance 6. If the operator steps on 3 and can stably support the lance 6, the anchor 3 can be pushed by the force of the operator 5 as it is.

  When the front end portion 61 of the lance 6 is raised, as shown in FIG. 5, the operator 5 pushes down between the fulcrum 62 of the lance 6 and the base end portion 63 (see FIG. 2). When the lance 6 is tilted about the fulcrum 62, the tip 61 is greatly raised. Thus, the operation of pushing down the proximal end portion 63 from the fulcrum 62 of the lance 6 raises the distal end portion 61. Since the roller 221 of the hook 22 is engaged with the lance 6 from above, when the load that the base end portion 63 tries to pull up the rod 6 from the fulcrum 62 of the lance 6 decreases, the rod according to the decrease in the load. 21 is shortened, the piston 211 is lowered, and the compressed air Ap in the front chamber 232 is expanded (illustrated by rough cross-hatching in FIG. 5).

  When the compressed air Ap in the expanded front chamber 232 falls below the set pressure of the regulator 24, new compressed air Ap is supplied through the regulator 24. At the same time, the air An flows out from the rear chamber 234, but the outflow from the rear chamber 234 of the air An does not particularly hinder the lowering of the piston 211. The inflow of the compressed air Ap into the front chamber 232 serves as a force that prompts the piston 211 to descend. Thus, the compressed air Ap flowing into the front chamber 232 through the regulator 24 helps the rod 21 to contract, and compensates for the force required to push down between the fulcrum 62 and the base end 63 of the lance 6.

  When the rod 6 is shortened by pushing down between the fulcrum 62 of the lance 6 and the base end portion 63, the compressed air Ap is supplied to the front chamber 232 and the piston 211 is forcibly pushed down. The shortening of the rod 21 follows. As described above, when the contraction of the rod 21 follows the lance 6 without being delayed, the shackle 4 connecting the air cylinder 2 and the anchor 3 remains in tension, and there is no possibility that the hook 22 is detached from the lance 6. . At this time, the load applied to the anchor 3 is not a force that lifts the lance 6 but a force that opposes a moment proportional to the length from the distal end portion 61 to the fulcrum 62 of the lance 6. If the operator steps on 3 and can stably support the lance 6, the anchor 3 can be pushed by the force of the operator 5 as it is.

  As shown in FIG. 6, the worker 5 may stand with the air cylinder 2 sandwiched between the worker 5 and the fulcrum 62. In this case, the anchor 3 is placed on the work scaffold 7 in the direction opposite to the above example, that is, in the direction in which the auxiliary pipe 32 is located on the side farther from the fulcrum 62 with the cylinder 2 interposed therebetween. Then, the operator 5 steps on the auxiliary pipe 32 outside the right foot 53, steps on the main body pipe 31 with the heel of the left foot, and has the right hand 51 and the left hand 52 around the lance 6 sandwiching the hook 22. Since the positional relationship of the cylinder 2 with respect to the fulcrum 62 and the base end portion 63 is the same as the above example, the lance 6 can be operated and tilted in the same manner as described above.

  As shown in FIG. 7, the anchor 3 is pivoted horizontally with the main pipe 31 in a lifted position with the left foot 54 attached to the upper surface around the auxiliary pipe 32 pressed by the right foot 53, and the orientation of the anchor 3 is changed. Can be changed. The cylinder 2 cannot be fixed at the lower end of the tube 23 if the pressure of the main pipe 31 by the left foot 54 is loosened or eliminated, and therefore the rod 2 is lifted up without extending the rod 21 even if the lance 6 is lifted. Accordingly, the main pipe 31 can be lifted along with the lance 6 lifted by the operator 5, and the main pipe of the anchor 3 is moved so that the remaining auxiliary pipe 32 is brought into sliding contact with the work scaffold 7 and the neck is lowered to the side. 31 horizontal orientations can be changed.

1 Lance operation assist device 2 Air cylinder
21 Rod
22 hook
23 tubes
231 Precharge outlet
232 Front room
233 Post-charge outlet
234 Back room
24 Regulator
25 Medium supply hose 3 Anchor
31 Body pipe
32 Auxiliary pipe 4 Shackle 5 Worker 6 Lance
61 Tip
62 fulcrum
63 Base end 7 Working scaffold

Claims (3)

The lower end of the cylinder that protrudes the rod upward from the tube is placed on the work scaffold and is connected to the anchor that the operator steps on by a connecting member so as to be freely configured,
The cylinder is provided with an engaging portion on the rod that engages at least from above with the lance, a regulator is provided at the front supply / discharge port of the front chamber above the tube, and the front supply / discharge port is connected to the front chamber via the regulator. A lance operation assisting device that supplies and discharges the pressure medium and naturally supplies and discharges the pressurized medium to and from the rear supply / discharge port of the rear chamber below the tube. The lance operation assisting device according to claim 1, wherein the anchor is configured integrally with a main body portion that connects the connecting members and an auxiliary portion that intersects the main body portion. The lance operation assisting device according to claim 1 or 2, wherein the anchor has a flat lower surface facing the work scaffold and a convex surface on the opposite upper surface.

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