JP3787065B2 - Transporter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a load transporter that uses a drive unit such as a hydraulic cylinder or an air cylinder as a drive source and lifts and lowers a load through a transport unit such as a wire, a belt, or an arm.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a load carrier transporter that uses hydraulic pressure or air as a drive source and transports a load such as a person or an object via a belt, an arm, or the like is known. When there is a sudden load change due to dropping of a load during transportation, the load carrier has a certain load, such as a hook, cage, gondola, etc. Safety measures have been taken to prevent the (locking) member from jumping due to inertial motion.
[0003]
As one of the typical examples, there is a measure of “suppressing the belt ascending speed by attaching an oil damper to a hydraulic cylinder for raising and lowering the belt”. This countermeasure will be described with reference to FIG. 9. For example, when the load 100 is dropped from the lifting tool 101 due to some trouble, the equilibrium state in which the cylinder 102 is kept with the load is broken. Due to this, the belt 103 engaged with the cylinder 102 tends to rise rapidly, but since the oil damper is attached to the cylinder 102, the ascending speed of the belt 103 is suppressed by the action of the oil damper and jumps. Is prevented.
[0004]
[Problems to be solved by the invention]
However, the one using the oil damper has a problem that the operating force by the oil damper always becomes a resistance even in a normal raising / lowering operation, and the operability during raising / lowering is deteriorated. There is also a problem that the number of processed parts is large and the cost is high.
[0005]
For this reason, in order to eliminate such problems, when the belt that lifts the load rises at a speed higher than desired, the hook disposed on the rotor that rotates following the belt protrudes by the centrifugal force and protrudes to the belt itself. There has been proposed a mechanism for preventing jumping of a load carrier that suppresses the belt ascending speed by applying braking (Japanese Patent Laid-Open No. 2000-7287). However, this jumping prevention mechanism also requires a complicated mechanism for braking the belt itself, and a heavy load on the belt during braking may require measures to improve wear resistance and durability. .
In addition to these, there are some which detect that the load has fallen from the suspension by a limit switch etc. and prevent jumping, but it is difficult to stop instantaneously due to signal delay, valve operation delay, etc. There is a problem.
[0006]
In addition, in a conventional transporter in which a speed controller is arranged in a hydraulic circuit of a driving means (cylinder) for transporting a load, there is a problem that operability is poor in normal cargo handling work. The configuration of this hydraulic circuit will be described with reference to FIG. 10. In the figure, 121 is a cylinder for raising and lowering a load, 122 is a pilot regulator, 123 is a speed controller, 124 is a load sensor, and 125 is a hydraulic source. In this circuit, the pilot hydraulic pressure is applied to the pilot regulator 122 via the speed controller 123 based on the information detected by the load sensor, the hydraulic pressure from the hydraulic source is supplied to the cylinder 121 via the pilot regulator 122, and the load is moved up and down. I try to let them. However, in such a circuit, since a speed controller having a throttle is arranged in a circuit for sending pilot pressure, there is a problem that operability is poor at the time of carrying a normal load due to the action of the throttle.
[0007]
Accordingly, the present invention provides a transporter that lifts and lowers a load, wherein the transporter locks a load, a transport unit that lifts and transports the locking unit, and a drive unit that moves the transport unit up and down. And a component force reducing means that is connected to the transporting means at a connecting portion and reduces a component force of a load change caused by the connecting portion based on a predetermined condition due to a load change, and the load means is raised by the driving means. When the load falls from the locking means due to some trouble and a sudden load change occurs on the transportation means, the reduction means does not act on the transportation means itself when reducing the load change. It is an object of the present invention to provide a transporter that can prevent the jumping of the locking means due to inertial motion by distributing the load change by the portion and reducing the distributed component force, and to solve the above problems.
It is another object of the present invention to provide a transporter with good operability by omitting the speed controller in the hydraulic circuit.
[0008]
[Problems to be solved by the invention]
For this reason, the technical solution means adopted by the present invention is:
In the transporter that transports a load, the transporter includes a locking unit that locks the load, a transporting unit that lifts and transports the locking unit, and a drive unit that moves the transporting unit up and down. It is connected by a connecting part fixed to the driving means and connected to the conveying means by the connecting part. A transporter comprising: a component force reducing unit that reduces a component force of a load change caused by the connecting portion based on a predetermined condition due to a load change.
The transporting means is a belt-like body or a string-like body, and the component force reducing means is provided with a mechanism for stopping the withdrawal of the belt-like body or the string-like body.
The transporting device is characterized in that the driving means is a cylinder operated by hydraulic pressure or pneumatic pressure.
Further, the mechanism for stopping the drawing includes a drum that winds the band-like body or string-like body by elastic means, and rapid rotation of the drum when the belt-like body or string-like body is fed out against the urging force of the elastic means A transporter characterized by comprising locking means that spreads in the outer diameter direction sometimes due to centrifugal force and stops the rotation of the drum.
In addition, the transport machine causes the pilot pressure from the auto balance device provided in the transport means to act on the pilot regulator via the flow control valve, and the hydraulic pressure from the hydraulic pressure source moves up and down the transport means via the pilot regulator. It is a transporter characterized in that it is provided with a hydraulic circuit that feeds and moves a load to drive means for movement.
[0009]
Embodiment
1 is a side view and a plan view of a load carrier according to the first embodiment. FIG. 2 is a hydraulic circuit diagram of the load carrier. 3 is an enlarged side view of the component force reducing mechanism, FIG. 4 is a cross-sectional view of the belt drawing device in the component force reducing mechanism, and FIG. 5 is a front view of the belt drawing device. This load carrying machine uses a belt as a carrying means for raising and lowering the load, and the component force reducing mechanism pulls out the belt-like body or string-like body, and the withdrawal is stopped when the speed exceeds a predetermined drawing speed. A seat belt type is used.
[0010]
In FIG. 1, reference numeral 1 denotes a guide rail constituting a load carrier, and a load lifting device 3 is attached to the guide rail 1 via a roller 2 so as to be movable along the guide rail 1. In addition, as shown in FIG. 6, it can also be set as the format with which the load lifting device 3 was provided in the arm attached to the base.
The load lifting device 3 includes a main body 4, a driving means (hereinafter referred to as a hydraulic cylinder) 5 that is disposed in the main body 4 and moves the load W up and down, and a locking means that locks the load (in this example, a lifting tool). 11. A transport means (in the present example, a belt, hereinafter referred to as a lifting belt) 9 is provided for lifting and lowering the locking means 11, and the piston rod 6 of the hydraulic cylinder 5 has a main body at its tip. 4 is provided with a connecting portion 8 (consisting of a bracket having guide rollers 7 in this example, hereinafter referred to as a belt mounting bracket) 8 guided by the inner wall, and the lifting belt 9 for lifting the load W on the belt mounting bracket 8. One end is fixed. The belt 9 hangs downward via a pulley 10 provided at the end of the main body 4, and a suspension for suspending a load W via an autobalance device ATB at the lower end of the lifting belt 9. A tool 11 is attached. The auto balance device ATB is connected to the hydraulic cylinder 5 by a hydraulic circuit described later.
[0011]
The circuit configuration of the hydraulic cylinder 5 will be described with reference to FIG.
In the figure, a circuit connected to the hydraulic cylinder 5 is connected to a hydraulic power source 59 via a pilot valve 51 and a pilot regulator 52, and a speed controller 55 is connected to the pilot regulator 52 in parallel. In addition, a logic element 53 is connected to the pilot regulator 52, a hydraulic pressure source 59 is connected to the logic element 53 via a regulator 54, and a hydraulic pressure source 59 is connected via a flow control valve 56 and a pilot regulator 57. ing. An autobalance cylinder 58 is connected to the pilot regulator 57, and the pilot regulator 57 and the autobalance cylinder 58 constitute an autobalance device ATB.
In this hydraulic circuit, the hydraulic pressure generated in the autobalance cylinder 58 acts on the pilot regulator 57, and the hydraulic pressure from the hydraulic source 59 acts on the logic element 53 via the flow control valve 56 and is output from the logic element 53. The hydraulic pressure (this hydraulic pressure is equal to the output hydraulic pressure of the flow control valve 56) acts on the pilot regulator 52, and the hydraulic pressure from the hydraulic source 59 acts via the speed controller 55, and the pilot valve 51 opens the flow path. The hydraulic pressure of the same pressure is supplied from the hydraulic source 59 to the hydraulic cylinder 5 to raise the load. In this circuit, since the throttle (the conventional speed controller 123) in the circuit for supplying the pilot pressure to the pilot regulator 52 is eliminated, the operability is improved.
[0012]
In FIG. 3, a bracket 13 for attaching component force reducing means 12 (hereinafter referred to as a belt drawing device) capable of pulling out a belt-like body or a string-like body is provided at the end of the main body 4 described above. The belt drawing device 12 is attached to the bracket 13 and the end of the belt 14 of the belt drawing device 12 is fixed to the belt mounting bracket 8 described above. Thus, by arranging the belt drawing device 12 in substantially the same direction as the operation direction of the hydraulic cylinder 5, the component force of the changing load can be directly reduced, so that the stop responsiveness is improved.
In FIG. 4, the belt drawing device 12 includes a belt take-up drum 17 that is rotatably supported by a main body 17 via a bearing 15. A spring spring that is an elastic member is provided at one end (not shown) of the drum 17. The drum 17 is attached with a biasing force in the direction of winding the belt 14 by the biasing force of the spring spring. It is obvious that other springs, rubber, resin, and the like that perform the same function can be replaced without the spring spring.
[0013]
As shown in FIG. 4, a disc-shaped fixing plate 18 that rotates integrally with the drum 17 is attached to the end of the drum 17 on the opposite side of the spring spring of the belt drawing device 12. A hook 19 that constitutes a locking means is swingably attached around a bolt 20, and a guide plate 21 is fixed to the outside of the hook 19. That is, the hook 19 is disposed in a gap formed between the fixed plate 18 and the guide plate 21 and is swingably attached by the bolt 20. One end of a coil spring 22 that urges the hook 19 toward the center is attached to the hook 19 (see FIG. 5), and the other end of the coil spring 22 is fixed to an urging force adjusting screw 23. The urging force adjusting screw 23 is screwed into a bracket 24 attached to the fixed plate 18, and the urging force adjusting screw 23 is rotated to adjust the urging force of the coil spring 22 by moving the screw in the axial direction. The operating point of the prevention mechanism can be changed. In this example, as a result of performing tests and evaluations from the viewpoint of achieving both an operational feeling and a jumping prevention mechanism, the operation speed during transfer when the balancer (loader transporter) is 250 to 375 Kg type is 250 to 300 mm / sec. The operation speed when transferring with a balancer of 75 to 150 kg type is 300 to 400 mm / sec, and the operation speed when transferring with a balancer of 40 to 60 kg type is 500 to 600 mm / sec. When the weight is 120 g, it is 1.62 N / mm for the 250 to 375 kg type, 1.82 N / mm for the 75 to 150 kg type, 2.02 N / mm for the 40 to 60 kg type, and 250 when the weight of the hook is 250 g. Up to 375Kg type 1.18N / mm, 75-150Kg type 1.38N / mm, 40-60Kg type 1.62N / mm, to and is found to be optimal.
[0014]
The belt drawing device 12 includes a case 25 that also serves as a hook locking member, and a plurality of grooves 26 that engage with the hook 19 are formed on the inner peripheral surface corresponding to the hook 19.
In this belt drawing device 12, when the belt is pulled, the drum 17 rotates while bending a spring spring (not shown), and the belt is drawn out. When the belt drawing speed increases, the hook 19 moves toward the outer periphery while extending the coil spring 22 by centrifugal force. When the centrifugal force further increases, the hook 19 finally engages with the groove 26 formed in the case 25. Thus, the belt drawing is stopped.
[0015]
The operation of the load carrier transporter having the above configuration will be described.
In FIG. 1, the piston rod 6 of the hydraulic cylinder 5 is extended rightward in the figure before the start of cargo handling, and the lifting belt 9 attached to the belt mounting bracket 8 also moves downward, and the lifting belt The load W can be attached to the hanger 11 provided at the lower end of 9. In this state, the belt 14 of the belt drawing device 12 attached to the belt attachment bracket 8 is also in an initial state where it is wound around the drum 17 by the action of the spring.
[0016]
A load W is applied to the hanger 11, and the autobalance device ATB is operated to lock the hanger 11 to the load and raise it. At this time, the hydraulic pressure generated in the autobalance cylinder 58 acts on the pilot regulator 57, and the hydraulic pressure from the hydraulic source 60 acts on the logic element 53 via the flow control valve 56, and the hydraulic pressure output from the logic element 53 (this The hydraulic pressure is equal to the output hydraulic pressure of the flow control valve 58) acting on the pilot regulator 52, and the hydraulic pressure from the hydraulic pressure source 59 acts via the speed controller 55, and the hydraulic pressure source 59 via the pilot valve 51 is opened. To supply the hydraulic cylinder 5 with the same pressure. The piston rod 6 is moved to the left in the figure by the operation of the hydraulic cylinder 5, the lifting belt 9 is raised, and the load W is lifted. At the same time, the belt 14 of the belt pulling device 12 is fed out while bending the mainspring. At this time, centrifugal force acts on the hook 19 attached to the drum 17, but the rotation speed of the drum 17 is slow, and therefore the hook 19 can freely rotate without engaging the groove 26 of the case 25. It is in a state.
[0017]
When the load W is detached from the lifting tool 11 for some reason, the weight of the load W is lost, and the equilibrium state in which the load W is lifted and kept is broken, so that the piston rod 6 is caused by the force lifting the load W. It moves at a speed higher than a predetermined speed, and the moving speed of the lifting belt 9 and the belt 14 of the belt drawing device 12 is also increased. As a result, the rotational speed of the drum 17 of the belt drawing device 12 increases, the centrifugal force acting on the hook 19 increases, the hook 19 moves against the urging force of the coil spring 22, and the groove of the case 25 26, the pulling out of the belt 14 is stopped, whereby the movement of the piston rod 6 and the lifting belt 9 is also stopped. Thus, when the rotational speed of the drum 17 of the belt drawing device 12 becomes higher than a predetermined speed, the drawing of the belt 14 is stopped, and the movement of the lifting belt 9 is also stopped to prevent jumping. As described above, the predetermined speed is 250 to 300 mm / sec for the 250 to 375 kg type, 300 to 400 mm / sec for the 75 to 150 kg type, and 500 to 600 mm / sec for the 40 to 60 kg type.
[0018]
The belt pulling device 12 is restored to the initial state when the belt 14 is loosened, the belt 14 is wound around the drum 17 by the urging force of a spring spring (not shown), and the hook 19 is grooved by the movement of the belt 14 at this time. The belt pulling device returns to the initial state by the action of the spring spring. Further, when the piston rod 6 is moved to the left in FIG. 1 and the hook 19 of the drawer device is operated by the force lifting the load W, the belt of the drawer device is operated by an operation from an operation panel (not shown). 14 is loosened to return to the initial state.
[0019]
In the first embodiment, the description has been given of the use of the belt as the locking means for lifting the load and the pull-out means capable of pulling out the belt-like body or the string-like body. Needless to say, the present invention can also be applied to a material using a material that can be pulled out and wound up, such as a string-like body.
[0020]
Next, a second embodiment of the present invention will be described with reference to FIGS.
This second embodiment is characterized in that an arm is used as a conveying means for lifting a load, and a known seat belt is used as a component reducing means (belt drawing device), as shown in the figure. A lifting tool 31 for lifting the load W is provided on a support member 33 that is swingably provided at the tip of an arm 32. The arm 32 is provided on the side plate 41 so as to be swingable up and down by the lifting means of the hydraulic cylinder 34, the side plate 41 is rotatably attached to the support column 35, and the side plate 41 is further above the arm 32. A belt pull-out device 36 that can pull out the band-like body or the string-like body by the movement of is attached to the main body. An end of a belt 37 is connected to the arm 32 by a pin 38. In this figure, a known seat belt unit (for example, as described in Japanese Patent No. 2625296) is used as the drawer device 36. In the figure, 39 is an auxiliary arm that forms a parallel link with the arm 32, and 40 is a balancer.
[0021]
Here, the basic configuration of the belt pulling device 36 using the seat belt unit described in the above-mentioned Japanese Patent No. 2625296 will be briefly described with reference to the drawings. It is a disassembled perspective view. The belt pulling device 36 has the same belt pulling mechanism as the seat belt disclosed in the above publication, and the cover 147 has a different shape.
[0022]
The belt drawing device 36 includes a frame 112, and a pair of leg portions 113 and 114 extend in parallel with each other from both sides of the frame 112. A winding shaft 120 is pivotally supported by these leg portions 113 and 114, and one end portion of the belt 37 is locked to the winding shaft 120.
The other end portion of the winding shaft 120 protrudes to the outside of the leg portion 114, and a bifurcated portion 120A is formed on the protruding portion. Around the bifurcated portion 120A, lock plates 124 and 125 that constitute locking means are arranged. Each of the lock plates 124 and 125 has a substantially C shape in which a substantially U-shaped notch recess 126 is formed at the center, and the bifurcated portion 120 </ b> A is located in the notch recess 126. The notch recess 126 has a width that is slightly larger than the width of the forked portion 120 </ b> A, and the lock plates 124 and 125 can rotate relative to the take-up shaft 120 by a predetermined angle.
[0023]
Claw portions 128 and 130 are formed at one end portions of the lock plates 124 and 125, respectively, and the lock teeth of the internal gear wheel 132 that is fixed to the leg portion 114 and constitutes a lock means together with the lock plates 124 and 125. Opposite. Further, a pair of pins 134 and 136 project from the lock plates 124 and 125, respectively. Each pin 134, 136 is inserted into a long hole 140 formed in the lock ring 138, and a tip portion thereof protrudes outward from the long hole 140. The lock ring 138 is pivotally supported by a small-diameter shaft portion 120 </ b> B that protrudes from the shaft center portion of the winding shaft 120, and is rotatable relative to the winding shaft 120.
[0024]
Ratchet teeth 138A are formed on the outer peripheral surface of the lock wheel 138, and a rotor 144 is fixed to the tip of the small diameter shaft portion 120B after protruding from the lock wheel 138. For this reason, the rotor 144 always rotates integrally with the winding shaft 120. An inertia mass body 170 is integrally fixed to a surface of the lock wheel 138 opposite to the lock plates 124 and 125. The inertia mass body 170 is made of metal and formed in a ring shape, and two pairs of protrusions 172 and protrusions 174 are formed on the inner peripheral wall. The protrusion 172 and the protrusion 174 correspond to the forked portion 120A of the winding shaft 120, and the forked portion 120A is located between the protrusion 172 and the protrusion 174. The protrusions 172 and 174 can be engaged with the forked portion 120A, and restrict the movement of the forked portion 120A. In other words, the winding shaft 120 and the inertial mass body 170 (that is, the lock ring 138) can rotate relative to each other within a range in which the forked portion 120A can move between the projection 172 and the projection 174, and the forked portion 120A projects. In the state engaged with the projections 172 and 174, the rotational force of the winding shaft 120 is transmitted to the inertial mass body 170 via the projections 172 and 174.
[0025]
A torsion coil spring 143 is disposed between the rotor 144 and the lock wheel 138. The coil portion of the torsion coil spring 143 is externally fitted to the boss portion 139 of the lock wheel 138, and one end is locked to the lock wheel 138 and the other end is locked to the rotor 144. As a result, the lock ring 138 is urged and rotated in the belt drawing direction (the direction of arrow B in FIG. 1) by the urging force of the torsion coil spring 143. Therefore, the lock ring 138 accommodates the pins 134 and 136 of the lock plates 124 and 125 in one end portion of the long hole 140 by the biasing force of the torsion coil spring 143, and separates the claw portions 128 and 130 from the internal gear wheel 132. ing. The seat belt, which is detected by acceleration by adjusting the biasing force of the torsion coil spring 143, is the best means for preventing a sudden movement due to jumping, and the acceleration at the time of locking the seat belt is performed. Was found to be optimal at 0.37G.
A cover 147 is fixed to the outside of the leg portion 114 outside the lock wheel 138.
[0026]
In the belt withdrawing apparatus having the above configuration, when the belt is withdrawn suddenly and the take-up shaft 120 rapidly rotates in the belt withdrawing direction, the rapid belt take-up direction rotational force of the take-up shaft 120 is inertial via the protrusion 172. The lock ring 138 that directly acts on the mass body 170 and to which the inertial mass body 170 is fixed causes relative rotation (rotation delay) with respect to the winding shaft 120. As a result, as described above, the pins 134 and 136 of the lock plates 124 and 125 are guided by the long holes 140, the claw portions 128 and 130 are engaged with the internal gear wheel 132, and the winding shaft 120 rotates in the belt drawing direction. Be blocked. As a result, the belt 137 is prevented from being pulled out and the load is prevented from jumping.
[0027]
As described above, also in the second embodiment, as in the first embodiment, when the load is detached from the lifting tool for some reason, the weight of the load W is lost, and the equilibrium state in which the load W is lifted and maintained is maintained. Since the arm 32 is broken, the arm 32 is raised at a speed higher than a predetermined value by the elevating means, and the belt 37 is pulled out at a speed higher than a predetermined value. However, when the rotational speed of the drum of the belt pulling device 36 is increased, the belt 37 is pulled out. As a result, the ascending of the arm 32 is stopped and the jumping is prevented. In the second embodiment, the belt pull-out device 36 is disposed on the lower side with respect to the arm 32. However, the belt pull-out device 36 may be disposed on the upper side with respect to the arm. The device 36 is arranged on the weight 40 side of the arm 32.
[0028]
As mentioned above, although embodiment which concerns on this invention was described, in a component force reduction mechanism, if a component force is reduced by the winding apparatus, the load to an opposite direction, etc., it will not be limited to this. The above-described drawer device as a component force reducing mechanism capable of pulling out the belt-like body or string-like body may be disposed anywhere as long as the belt-like body or string-like body can be pulled out as the load is raised. In addition, the position where the belt-like body or string-like body constituting the drawer device is attached to the locking means can be attached to various positions as long as the belt-like body or the string-like body can be pulled out. Further, the drive means for raising and lowering the load is not limited to the hydraulic cylinder, and it is natural that a hydraulic cylinder or other belt winding device can be adopted. Further, as described in the second embodiment, it is also possible to use a commercially available vehicle seatbelt that can stop the belt pulling out when the speed exceeds a predetermined value, as described in the second embodiment. Further, in the above-described embodiment, the belt pulling-out type has been described as an example of the component force reducing mechanism, but various belts such as wires and ropes and string-like bodies can be smoothly drawn and wound instead of the belt. Materials can also be used.
Furthermore, the present invention can be implemented in various other forms without departing from the spirit or main features of the present invention, and thus the above-described embodiments are merely illustrative in all respects and are limitedly interpreted. should not be done.
[0029]
【The invention's effect】
As described above in detail, according to the present invention, when the pulling speed of the band or string constituting the component force reducing mechanism exceeds a predetermined value, a device that can stop the pulling of the band or string is loaded. A jumping prevention mechanism can be easily configured by attaching to interlocking means for lifting an object, and a jumping mechanism can be easily applied to a load carrier currently in use that could not be equipped so far. Will be able to apply. In addition, a commercially available seat belt device can be used as a component force reducing mechanism instead of a special pull-out device, and the device can be handled as one component, so that the cost can be reduced. Sufficient response to momentary motion is possible with the component force reduction mechanism, and the jumping distance can be kept at a safe distance (20% of the results of tests and evaluations compared to the conventional lock distance, the jumping distance is reduced to 25%) In the hydraulic circuit, it is not necessary to provide a speed controller in the circuit for supplying pilot pressure to the pilot regulator, so that excellent operability can be obtained. .
[Brief description of the drawings]
FIG. 1 is a side view and a plan view of a load carrier according to a first embodiment.
FIG. 2 is a hydraulic circuit diagram of a load carrier.
FIG. 3 is an enlarged side view of a component force reducing mechanism.
FIG. 4 is a cross-sectional view of a belt drawing device in a component force reducing mechanism.
FIG. 5 is a front view of the belt drawing device of FIG. 4;
FIG. 6 is a side view of a load carrier transporter equipped with a component force reducing mechanism according to a second embodiment.
7 is an enlarged side view of the main part of FIG. 6. FIG.
FIG. 8 is an exploded perspective view of a belt pulling device using a known seat belt unit constituting a component force reducing mechanism.
FIG. 9 is a perspective view of a load carrier transporter equipped with a conventional jumping prevention mechanism.
FIG. 10 is a hydraulic circuit diagram of the load carrier.
[Explanation of symbols]
1 Guide rail
2 Roller
3 Load lifting device
4 Body
5 Drive means (hydraulic cylinder)
6 Piston rod
7 Guide roller
8 Connecting part (Mounting bracket)
9 Transportation means (lifting belt)
10 pulley
11 Locking means (suspender)
12 Component force reducing means (belt drawing device)
13 Bracket
14 Belt
15 Bearing
17 drums
18 Fixed plate
19 Hook
20 volts
21 Guide plate
22 Spring
23 Biasing force adjusting screw
24 Bracket
25 cases
26 Groove
31 Suspension
32 arms
33 Support member
34 Drive means (hydraulic cylinder)
35 Support pillar
36 Component force reduction mechanism (belt drawing device)
37 belt
38 pins
51 Pilot valve
52 Pilot regulator
53 logic elements
54 Regulator
55 Speed controller
56 Flow control valve
57 Pilot regulator
58 Cylinder for auto balance
59 Hydraulic source

Claims (5)

In the transporter that transports a load, the transporter includes a locking unit that locks the load, a transport unit that lifts and transports the locking unit, a drive unit that moves the transport unit up and down, and the drive unit. And a component force reducing means that is connected to the conveying means by the connecting portion and reduces the component force of the load change caused by the connecting portion based on a predetermined condition due to a load change. A transport machine characterized by. The transporter according to claim 1, wherein the transporting means is a belt-like body or a string-like body, and the component force reducing means is provided with a mechanism for stopping the withdrawal of the belt-like body or the strap-like body. The transporter according to claim 1 or 2, wherein the driving means is a cylinder that operates by hydraulic pressure or pneumatic pressure. The mechanism for stopping the drawing includes a drum that winds the band-like body or string-like body by elastic means, and a centrifugal force when the drum or the string-like body is fed out against the biasing force of the elastic means when the drum rotates rapidly. 3. The transporter according to claim 2, further comprising a lock unit that spreads in the outer diameter direction by force and stops the rotation of the drum. The transporter causes a pilot pressure from an auto balance device provided in the transport means to act on a pilot regulator via a flow control valve, and causes the hydraulic pressure from a hydraulic source to move up and down via the pilot regulator. The transporter according to any one of claims 1 to 4, further comprising a hydraulic circuit that supplies the driving means to lift and lower the load.

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