JPH01133892A - Winding device with vacuum sucker - Google Patents

Abstract

PURPOSE: To improve operability and reduce vacuum loss by arranging a vacuum suction device near an suction cup, by sucking, hoisting, and lowering a hoisted article by up and down action of a movable grip, and by releasing the suction by the next up and down action. CONSTITUTION: A vacuum suction device 10 generates vacuum by an ejector effect, by arranging a vacuum generator 30 between suction cups 13 and by jetting compressed air supplied through an air tube 19. The vacuum suction device 10 drops and lands on a hoisted article when a movable grip 21 is operated down, then, is sucked to it with the suction cups 13 by an action of the vacuum generator 30 by an action of a limit switch 31, and rises by a grip's up-operation and moves to a given position with a trolley. Next, the vacuum suction device 10 drops by the down operation, releases the suction after detection of the landing by the limit switch 31, and then rises away from the hoisted article by the up operation. Thus, operability is improved and the vacuum generator can be miniaturized with reduced vacuum loss.

Description

[Detailed Description of the Invention] [Industrial Application] The present invention includes a vacuum suction device for vacuum suctioning an object,
The present invention relates to a hoisting device equipped with a vacuum suction device that allows a worker to hoist and lower an object as if he were lifting it himself.

[Prior art]

Conventionally, in a hoisting device in which a hook for suspending a load is attached to the end of a hoisting chain and the hoisting chain is hoisted and lowered by forward and reverse rotation of a drive motor, the operator has to lift and lower the hoisted object himself. An example of an electric chain hoist that can be hoisted up and down with the feeling of hoisting is the ``Electric Chain Hoist Operating Device'' previously filed by the present applicant (Japanese Patent Application No. 62-225).
No. 948). The operating device includes a grip that is slidably fitted to the end of the hoisting/uploading chain and a cylindrical body attached to the load hanging hook, and a vertical movement detector that detects the vertical movement of the grip. It is configured so that it can be hoisted up and down by moving up and down. Therefore, this operating device has the feature that the operator can lift and lower the hoisted object as if he or she were lifting and lowering the hoisted object.

[Problem that the invention seeks to solve]

However, in the operating device for an electric chain hoist having the above configuration, in order to lift an object, a hanging device such as a rope is attached to the object, the hook at the end of the chain is hung on the hanging device, and then the grip is operated to lift the object. Because of the hoisting and lowering process, not only is the work involved in hoisting objects cumbersome, but there is also the problem that it is difficult to hoist objects that are unsuitable for attaching hanging tools such as ropes, such as cardboard boxes. Ta.

The present invention has been made in view of the above-mentioned problems, and is equipped with a vacuum suction device having a suction cup to remove objects from hanging tools such as ropes by a simple operation of raising and lowering a movable grip. To provide a hoisting device with a vacuum suction device that allows an operator to easily transport an object that is unsuitable for hanging with a vacuum suction device as if he were lifting it up and lowering it himself.

[Means for solving problems]

In order to solve the above problems, the present invention provides a suction cup that is attached directly or indirectly to the lower end of a hoisting chain or rope and that adsorbs to the surface of a suspended object, and a suction cup that is located near the suction power tab. A vacuum suction device has a vacuum generating device that makes the inside of the cup a vacuum or non-vacuum, and a drive motor is rotated forward or reverse by operating an operation switch located on the top of the vacuum suction device that commands vertical movement. The present invention is characterized by comprising an operation control means for hoisting and lowering the chain or rope, making the hoisting operation and the hoisting operation one cycle, and repeating suction and non-suction of the vacuum suction device every other cycle.

Further, the vacuum suction device is characterized in that a plurality of suction cups are attached to the frame at intervals, and a vacuum generator is disposed between the suction force/knob.

Further, the vacuum suction device is attached to the lower end of a chain or rope for hoisting and lowering with a cylinder interposed therebetween, and the operation control means includes a movable grip that moves up and down on the outer periphery of the cylinder, and Further, the operation control means includes a landing detector that detects landing of the vacuum suction device from loosening of the hoisting and lifting chain or rope, and a movable grip. The device is equipped with a hoisting and hoisting detector that detects the vertical movement of the hoisting device, and by the operation of the landing detector and the hoisting and hoisting detector, the hoisting operation and hoisting operation are made into one cycle, and the suction and non-adsorption of the vacuum suction device are performed every other cycle. It is characterized by being configured to repeat adsorption.

[Effect]

By configuring the hoisting device with a vacuum suction device as described above, by moving the operating switch or movable grip on the top of the vacuum suction device up and down, the operator can transport the object to be lifted as if he were lifting it himself. In addition, since the vacuum suction device can perform adsorption and non-adsorption only by operating the movable grip, the operation of lifting and lowering the object to be lifted becomes extremely easy.

Furthermore, since the vacuum generator is placed near the suction cup and the compressor is installed separately, vacuum loss is reduced and the vacuum generator including the vacuum generator can be downsized.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1(a) is a front view of a hoisting device with a vacuum suction device according to the present invention, and FIG. 1(b) is a side view thereof. In the figure, 10 is a vacuum suction device, and the vacuum suction device 1
Reference numeral 0 denotes a vacuum generating device in which a suction cup 13 for adhering to the surface of a suspended object is provided at a predetermined position of a frame body 11, and a vacuum generator is housed between the suction cups 13 to make the suction cup 13 into a vacuum or non-vacuum. 30 is installed. It has a structure in which an air tube 12 is connected to the suction cup 13. The leading end of a cylindrical body 14 is fixed to the frame 11, and a cylindrical bracket 15 is fixed to the rear end of the cylindrical body 14.

On the other hand, the bracket 1 is attached to the tip of the chain 16 for winding up and down.
A piston member 17 is attached which slides into the piston 5 . The piston member 17 is provided with a flange 17 at a predetermined interval vertically.
a and 17b are formed, and the upper part of the bracket 15 is slidably fitted between the flanges 17a and 17b of the piston member 17 with a spring 18 interposed therebetween. The upper end of the hoisting/up-down chain 16 is engaged with a hoisting/up-down sprocket (not shown), and the hoisting/up-down chain 16 is moved up and down by the forward and reverse rotation of the sprocket. Further, a limit switch 31, which will be described in detail later, is provided inside the bracket 15 and is operated by moving the piston member 17 up and down.

An air tube 19 and a signal cable 20 are spirally provided around the outer periphery of the winding/up/down chain 16, and the air tube 19 and signal cable 20 are wound in a double spiral. In addition, the air tube 19 and the signal cable 20
is in communication with a solenoid valve of a vacuum generator, which will be described later, and which is housed in the vacuum generator 30.

A movable grip 21 that slides up and down by a predetermined dimension is provided on the outer periphery of the cylinder 14, and a fixed grip 22 fixed to the cylinder 14 is provided at the lower part of the movable grip 21.

In addition, in the figure, 23 is an electrical component box section that houses various electrical components of the hoisting device, 24 is a reducer section, 25 is a motor section, 2
Reference numeral 6 designates a hanging hook for hanging the present hoisting device from a ceiling or a trolley, and 27 designates a chain storage portion for storing the hoisting and lowering chain 16.

In the hoisting device with a vacuum suction device configured as described above, as the movable grip 21 moves up and down, the hoisting/up/down chain 16 moves up and down as will be described in detail later, and when the movable grip 21 is lowered, the vacuum suction When the device 10 descends and lands on the lifted object, the hoisting and lowering chain 16 loosens.
The limit switch 31 is actuated to detect landing, and as will be described in detail later, a vacuum is generated and the suction cup 13 is suctioned onto the lifted object. When the movable grip 21 is raised in this state, the hoisting/up-down chain 16 is hoisted up and the vacuum suction device 10 is raised. After rising to a predetermined position, a trolley (not shown) is moved sideways to move the vacuum suction device 10, which has suctioned the object to be lifted, to a predetermined position.

In this state, when the movable grip 21 is lowered, the vacuum suction lid device 1
0 falls, and when the limit switch 31 detects landing, the vacuum in the suction cup 13 is released, as described above. In this state, when the movable grip 21 is raised, the vacuum suction device 10
separates from the lifted object.

The fixed grip 22 is used when positioning the suction cup 13 of the vacuum suction device 10 at a suction position of an object to be lifted and placing the suction cup 13 thereon.

The specific configuration and operation of the control device that performs the above operations will be described below.

FIG. 2 is a diagram showing the system configuration of the vacuum suction device 10. As shown in the figure, a vacuum generator 51, a filter 52, a branch pipe 53, and a solenoid valve 54 are housed inside the vacuum generator 30. The solenoid valve 54 is a solenoid valve that turns on and off compressed air sent to the vacuum generator 51 through the air tube 19, and the air tube 12 communicating with the suction cup 13 is connected to the branch pipe 53.

The principle of vacuum generation by the vacuum generator 51 is that, as shown in FIG.
2 is a vacuum generator that generates a vacuum.

By providing the vacuum generator 51 as described above between the suction cups 13, that is, in the vicinity of the suction cups 13, the distance from the vacuum generator 51 to the suction cups 13 is shortened, so there is less loss, and the compressor The capacity of the 29 equivalent volume equipment can be reduced, and the overall balance of the hoisting device is improved compared to attaching the vacuum generator 30 to the main body of the hoisting device together with the reducer section 24, motor section 25, etc.

Figure 4 shows the cylindrical body 1 on which the movable grip 21 slides.
FIG. 4 is a cross-sectional view showing the inside of No. As shown, the cylinder 1
A limit switch 32 for detecting the upward movement of the movable grip 21 and a limit switch 33 for detecting the downward movement of the movable grip 21 are provided at predetermined positions inside the movable grip 4 . Further, an operating member 34 for operating the limit switches 32 and 33 is fixed to the inner wall of the movable grip 21. Note that 35 is a torsion spring for always biasing the movable grip 21 to a neutral position, that is, a neutral position (position shown in the figure) where the operating member 34 does not operate the limit switches 32 and 33.

FIG. 5 is a circuit diagram showing an operation control circuit for suctioning and hoisting up and down the hoisting device with vacuum suction device, and FIG. 6 is a timing chart for explaining the operation. In the figure, numbers 31-1, 31-2, and 3-3 are the contacts of the limit switch 31, and 31-1 is the contact point of the vacuum suction device 10.
31-2 is the vacuum suction device 10, which turns off when it lands on the ground.
A contact point 31-3 turns ON and OFF every time the vacuum suction device 10 lands. That is, the contacts 31-2 and 31-3 are so-called alternate type contacts that alternately repeat ON and OFF. Further, 32a is a limit switch 32 that is activated by the upward movement of the movable grip 21.
3, which is a contact that turns on when the movable grip 21 moves upward.
3a is a contact point of a limit switch 33 which is activated by the downward movement of the movable grip 21, that is, a contact point which is turned ON by the downward movement of the movable grip 21. Further, 36 is an electromagnetic switch for lowering, 37 is an electromagnetic switch for driving the vacuum generator, 38 is an electromagnetic switch for lowering,
SW is a vacuum switch that turns on when the vacuum reaches a set value.

In the operation control circuit having the above configuration, the vacuum suction device 1
0 is in the landing state, and the contact 31 of the limit switch 31
-2 is in the ON state, the contact 31-3 is in the OFF state, and the electromagnetic switch 37 for driving the vacuum generator is in the operating state. In this state, when the movable grip 21 is moved upward, the limit switch 32 is activated and its contact 32a is turned to the
When set to N, the hoisting electromagnetic switch 38 operates, the motor rotates forward, and the hoisting chain 16 is hoisted. As a result, the vacuum suction device 10 rises while adsorbing the object to be lifted,
The contact 31-1 of the limit switch 31 is turned on. When the hoisting device is moved and the movable grip 21 is lowered at a predetermined position, the contact 33a of the limit switch 33 is turned ON, the lowering electromagnetic switch 36 is activated, and the motor is reversed to lower the hoisting and lowering chain 16. . As a result, the vacuum suction bag =
12- When the platform 10 descends and lands, the contact 31-1 of the limit switch 31 is turned OFF, the lowering electromagnetic switch 36 is inactivated, the motor is stopped, and the lowering of the hoisting and lowering chain 16 is stopped.

When the vacuum suction device 10 lands, the limit switch 31
Contrary to the above, the contact 31-2 is turned OFF, and the contact 31-2 is turned OFF.
-3 is in ON state. As a result, the electromagnetic switch 37 for driving the vacuum generator becomes inoperable, and the adsorption of the suction cup 13 is released, resulting in a non-adsorption state. In this state, when the movable grip 21 is moved upward, the limit switch 32 is activated and its contact 32a'I! : Turn on. As a result, the lowering electromagnetic switch 38 is activated, the motor rotates forward, and the lowering and lowering chain 16 is hoisted. As a result, the vacuum suction device 10 rises without suctioning the object to be lifted, and the contact 31-1 of the limit switch 31 is turned ON. When the hoisting device is moved and the movable grip 21 is moved downward, the limit switch 33 is activated.
The contact 33a is turned ON, the lowering electromagnetic switch 36 is activated, the motor is reversed, and the lowering and lowering chain 16 is lowered. When the vacuum suction device 10 descends and lands, the contact 31-1 of the limit switch 31 is turned OFF, the lowering electromagnetic switch 36 becomes inactive, the motor stops, and the lowering of the hoisting and lowering chain 16 is stopped.

When the vacuum suction device 100 lands, the limit switch 31
Contact 31-2 turns ON again, and contact 31-3 turns OFF.
It becomes F state. As a result, the electromagnetic switch 37 for driving the vacuum generator is activated again, and the same operation as described above can be performed.

FIG. 7 is a circuit diagram showing another operation control circuit for suctioning, hoisting and lowering of the hoisting device with vacuum suction device, and FIG. 8 is a timing chart for explaining the operation.

In the figure, 31-4 is a contact point of the limit switch 31, which turns on when the vacuum suction device 10 lands;
Reference numeral 1-5 is a contact point of the limit switch 31, which is turned off upon landing. Reference numeral 39 denotes a ratchet relay, which is activated every time the contact 31-1 is turned on, and is activated so that the contact 39a is alternately turned ON and OFF for each winding/up-down operation. 40 is a vacuum generating solenoid, which is activated every time the contact 39a is turned on.

In the operation control circuit having the above configuration, the vacuum suction device 10
is in the landing state, and the contact 31- of the limit switch 31
4 is ON+, contact 39a of ratchet relay 39 is O
It is assumed that the vacuum generating solenoid 40 is in an operating state in the N state. When the movable grip 21 is moved upward in this state, the contact 32a of the limit switch 32 is turned on, and the hoisting electromagnetic switch 38 is turned on. As a result, the motor rotates normally, the hoisting and lowering chain 16 is hoisted, and the suction cup 13 of the vacuum suction device 10 rises while adsorbing the object to be lifted.

When the hoisting device is moved to a predetermined position and the movable grip 21 is moved down, the limit switch 33 is activated and its contact 3 is activated.
3a is turned on, the lowering electromagnetic switch 36 is turned on, the motor is reversely rotated, the lowering and lowering chain 16 is lowered, and the vacuum suction device 10 is lowered. When the vacuum suction device 10 lands on the ground, the limit switch 31 is activated, turning on the contact 31-4 and turning off the contact 31-5. When the contact 31-5 is turned OFF, the lowering electromagnetic switch 36 becomes inoperable, and the lowering of the lowering and lowering chain 16 is stopped. Further, when the contact 31-4 is turned on, the ratchet relay 39 is activated and opens the contact 39a. As a result, the vacuum generation solenoid 40 becomes inoperative, the suction cup 13 is released from suction, and becomes a non-suction state.

When the movable grip 21 is moved upward in this state, the limit switch 32 is activated and its contact 32a is turned ON. As a result, the hoisting electromagnetic switch 38 is activated, the motor rotates forward, the hoisting/up/down chain 16 is hoisted, and the vacuum suction device 10
lifts without attracting the lifted object. When the hoisting device is moved to a predetermined position and the movable grip 21 is moved downward, the limit switch 33 is activated and its contact 33a is turned ON.
Then, the lowering electromagnetic switch 36 is turned on, the lowering chain 16 is lowered, and the vacuum suction device 10 is lowered. When the vacuum suction device 10 lands, the limit switch 31
operates and turns on the contact 31-4, and the contact 3
1-5 is turned OFF. When the contact 31-5 is turned OFF, the lowering electromagnetic switch 36 becomes inoperable, and the lowering of the lowering and lowering chain 16 is stopped. Also, O of contact 31-4
Due to N, the ratchet relay 39 is activated, and its contact 3
Close 9a. As a result, the vacuum generation solenoid 40 operates, and the suction cup 13 enters the suction state. As described above, even when the ratchet relay 39 is used in place of the alternate type contacts 31-2 and 31-3 shown in FIG. 5, the operation is similar to that of the operation control circuit shown in FIG.

In the above embodiment, a so-called electric chain hoist having a chain 16 for hoisting and lowering is used as an example of the hoisting device, but the hoisting device according to the present invention is not limited to this, and for example, Of course, a so-called electric hoist equipped with a wire rope may also be used.

Further, in the above embodiment, the operation control means is configured to operate the limit switch 32 and the limit switch 33 by vertical movement of the movable grip 21, but the operation control means is not limited to this. not,
For example, as shown in FIG. 9, the bracket 15 and the vacuum suction device 1
A member 72 is attached to the frame 11 of No. 0 and has a fixed grip 71 formed on the side thereof, and a hoisting pushbutton switch 73 and a hoisting pushbutton switch 74 are provided on the side of the member. It may be configured such that the push-up push button switch 73 or the hoist-down push button switch 74 can be operated at the same time as the handle is held.

Further, the operation control circuit is not limited to the circuit configuration shown in FIG. 5 and FIG.
It is operated by the vertical movement of a movable grip located at the top of the 0, and in response to the vertical movement, the drive motor is rotated in the forward or reverse direction to raise and lower the chain or rope for hoisting and lowering, and also to perform the hoisting and lowering operations. If it is an operation control means that repeats adsorption and non-adsorption of the vacuum suction device every other cycle, the specific circuit configuration thereof may be a relay circuit as shown in FIGS. 5 and 7, or a transistor circuit. An electronic circuit configuration such as the above may also be used.

〔Effect of the invention〕

As explained above, according to the present invention, the following excellent effects can be obtained.

■It is operated by operating the operation switch or moving the movable grip up and down, and in response to this up and down movement, the drive motor is rotated forward or reverse to raise and lower the hoisting chain or rope, and also performs the hoisting and lowering operations. 1 cycle, 1
Since it is equipped with an operation control means that repeats adsorption and non-adsorption of the vacuum adsorption device every cycle, the object to be lifted is adsorbed, lifted, and lowered in one cycle of the up and down operation of the operation switch or the up and down movement of the movable grip, A hoist with a vacuum suction device that is extremely easy to operate, the lifted object can be unadsorbed and the vacuum suction device can be raised and lowered with one cycle of the next up/down operation of the operation switch or the up/down movement of the movable grip. A device is obtained.

(2) Since the vacuum generator is placed near the suction cup and the compressor is installed separately, there is less vacuum loss and the vacuum generator including the vacuum generator can be made smaller.

■Since the vacuum generator is arranged in parallel between the suction cups, the vertical dimension between the cargo and the operating section can be set short, making it easier to operate the operating section.

[Brief explanation of the drawing]

FIG. 1(a) is a front view of a hoisting device with a vacuum suction device according to the present invention, FIG. 1(b) is a side view thereof, FIG. 2 is a diagram showing the system configuration of the vacuum suction device, and FIG. Figure 4 is a cross-sectional view showing the inside of the cylindrical body of the portion on which the movable grip slides, and Figure 5 is a diagram for explaining the principle of vacuum generation of the vacuum generator.
The figure is a circuit diagram showing the operation control circuit for suctioning, hoisting and lowering of the hoisting device equipped with this vacuum suction device, FIG. 6 is a timing chart for explaining its operation, and FIG. FIG. 8 is a circuit diagram showing another operation control circuit for suctioning and hoisting and lowering the upper device, FIG. 8 is a timing chart for explaining its operation, and FIG. 9 is a diagram showing another example of the operation means. In the figure, 10... vacuum suction device, 11... frame body,
12...Air tube, 13...Suction cup,
14...Cylinder body, 15...Bracket, 16...
... Chain for winding and lowering, 17 ... Piston member, 1
8...Spring, 19...Air tube, 2
0...Signal cable, 21...Movable grip,
22...Fixed grip, 23...Electrical component box section, 24...Reducer section, 25...Motor section,
26...Hook for hanging, 27...Chain storage section, 28...Air tube, 29...Compressor, 30...Vacuum generator, 31...Limit switch , 32, 33... limit switch, 3
5... Coil spring, 36... Electromagnetic switch for lowering, 37... Electromagnetic switch for driving vacuum generator, 38...
... Electromagnetic switch for hoisting, 39 ... Ratchet relay, 40 ... Solenoid for vacuum generation.

Claims (4)

[Claims] (1) A suction cup that is attached directly or indirectly to the lower end of the hoisting chain or rope and that attaches to the surface of the suspended object, and a suction cup that is located near the suction cup and creates a vacuum or non-vacuum inside the suction cup. A vacuum suction device having a vacuum generating device and an operation switch located on the top of the vacuum suction device that commands vertical movement are operated to rotate the drive motor forward or reverse to hoist and lower the hoisting chain or rope. A hoisting device with a vacuum suction device, characterized in that the hoisting device includes an operation control means that makes the hoisting operation and the hoisting down operation one cycle, and repeats adsorption and non-adsorption of the vacuum suction device every other cycle. (2) The vacuum suction device is characterized in that a plurality of the suction cups are attached to a frame at intervals, and the vacuum generating device is arranged in parallel between the suction cups. A hoisting device with a vacuum suction device according to claim (1). (3) The vacuum suction device is attached to the lower end of the hoisting and lifting chain or rope with a cylinder interposed therebetween, and the operation control means is provided with a movable grip on the outer periphery of the cylinder that moves up and down, The hoisting device with a vacuum suction device according to claim 1 or 2, wherein the operation switch is operated by vertical movement of the grip. (4) The operation control means includes a landing detector that detects landing of the vacuum suction device based on loosening of a chain or rope for hoisting and lifting, and a hoisting/up-down detector that detects vertical movement of the movable grip; Due to the operation of the detector and winding/up/down detector,
The vacuum suction according to claim (3), characterized in that the hoisting operation and the unwinding operation are one cycle, and the suction and non-suction of the vacuum suction device are repeated every other cycle. Hoisting device with device.