JP7177204B2 - Hook engaging device and vacuum lift - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hook engaging device for engaging double hooks for lifting an object, and a vacuum lift equipped with such a hook engaging device.

2. Description of the Related Art Conventionally, there has been known a vacuum lift that transports a transported object to a destination by lifting the transported object with a ceiling crane or the like in a state in which a plurality of suction pads provided on the lower surface adsorb the transported object. A hook engaging device for engaging the double hooks may be attached to the vacuum lift having the above configuration.

The hook engaging device comprises a pair of swing arms that can be opened and closed, as disclosed in Patent Documents 1 to 4, for example. By closing the pair of rotating arms, the double hook is engaged, and by opening the pair of rotating arms, the engagement with the double hook is released.

Japanese Utility Model Laid-Open No. 50-152366 JP-A-09-255273 Japanese Utility Model Laid-Open No. 52-004674 Japanese Utility Model Laid-Open No. 49-084867

However, in the hook engaging device of Patent Document 1, it is necessary to manually attach and detach the pair of rotating arms to and from the double hook, which complicates the attachment and detachment work. Further, the hook engaging devices of Patent Documents 2 to 4 require external power to release the engagement between the double hook and the pair of rotating arms, which makes the configuration complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide a hook engaging device in which a mechanism for attaching and detaching a double hook and a pair of rotating arms is achieved with a simple structure. to provide.

In order to solve the above-mentioned problems, the present invention is a hook engaging device for detachably engaging a double hook, comprising a single support shaft, and each lower end portion being rotatable about the single support shaft. a pair of rotating arms supported by and extending obliquely upward so as to form a first angle in a natural state; A link portion that narrows the angle formed by the first angle to a second angle that is smaller than the first angle, a lock mechanism that locks the pair of rotating arms at the second angle, and the pair of rotating arms. In the state locked at the second angle, a pair of engaging portions with which the two hooks forming the double hook engage, and the double hook moving in a direction to widen the angle formed by the pair of rotating arms. a releasing portion that is pressed to release the lock by the locking mechanism , wherein the pair of rotating arms move from the lower end supported by the support shaft toward the upper end when forming the second angle. It is characterized in that it extends so as to widen the distance between them, and rotates in the direction of widening to the first angle by its own weight when the locking by the locking mechanism is released.

According to the present invention, the attachment/detachment mechanism between the double hook and the pair of rotating arms can be realized with a simple configuration.

It is a schematic diagram of a vacuum lift. It is an assembly perspective view of a hook engaging device. It is a top view of a hook engaging device. It is a schematic diagram of a lock mechanism. It is a figure which shows the state of a hook engaging device in the process to engage a double hook. It is a figure which shows the state of a hook engaging device in the process of cancel|releasing engagement of a double hook.

A vacuum lift 1 according to an embodiment will be described below with reference to the drawings. It should be noted that the embodiments of the present invention described below are merely examples of embodying the present invention, and the scope of the present invention is not limited to the scope of the description of the embodiments. Therefore, the present invention can be implemented by adding various changes to the embodiments.

FIG. 1 is a schematic diagram of a vacuum lift 1. FIG. The vacuum lift 1 is conveyed to a desired position by a crane (not shown) in a state in which the conveyed object is sucked, and by detaching the conveyed object at the position after conveyance, the conveyed object is moved to the desired position. It is a device. A vacuum lift 1 mainly includes a support block 2 and a plurality of suction pads 3a to 3g.

The support block 2 is a long (for example, 10 m or longer) columnar member whose length in the left-right direction is longer than in the up-down direction and in the front-rear direction. A plurality of suction pads 3a to 3g are arranged on the lower surface of the support block 2 at predetermined intervals. Then, with the suction pads 3a to 3g in contact with the surface of the object to be conveyed, the air in the internal space of the suction pads 3a to 3g is sucked by a vacuum pump (not shown). As a result, the suction pads 3a to 3g adhere to the conveyed object.

In this embodiment, as an example of the first direction and the second direction that are perpendicular to each other in the horizontal direction, the first direction is the left-right direction and the second direction is the front-rear direction. It is a relative relationship and is not limited to the above examples.

A hook engagement device 10 is fixed to the support block 2 . More specifically, the support block 2 comprises a bracket 4 for detachably securing the hook engaging device 10 . The bracket 4 protrudes upward from the upper surface of the support block 2 at the center of the support block 2 in the left-right direction. In other words, the bracket 4 is arranged on an imaginary line L passing through the center of gravity position G of the support block 2 and extending in the vertical direction.

The bracket 4 also has a through hole 5 and a pair of support portions 6 and 7 . The through hole 5 penetrates the bracket 4 in the front-rear direction. A support shaft 11 , which will be described later, is inserted through the through hole 5 . The pair of support portions 6 and 7 are arranged on opposite sides in the left-right direction with the through hole 5 interposed therebetween. The pair of support portions 6 and 7 support the pair of rotating arms 12 and 13 so that the angle formed by the pair of rotating arms 12 and 13, which will be described later, becomes the first angle θ1.

The hook engaging device 10 is a device that engages a double hook 8 suspended from an overhead crane (not shown) or the like. The vacuum lift 1 can be lifted by raising the double hook 8 engaged with the hook engaging device 10. - 特許庁The double hook 8 is obtained by arranging two hooks 8a and 8b back to back. That is, the tips of the two hooks 8a and 8b are curved in opposite directions in the left-right direction.

The double hook 8 is attached to the tip of a wire (not shown) suspended from an overhead crane or the like. Also, the double hook 8 descends by letting out the wire and ascends by winding up the wire. Furthermore, the double hook 8 is configured to be rotatable around the wire.

Next, the hook engaging device 10 according to this embodiment will be described with reference to FIGS. 2 to 4. FIG. 2 is an assembled perspective view of the hook engaging device 10. FIG. 3 is a plan view of the hook engaging device 10. FIG. FIG. 4 is a schematic diagram of the lock mechanism 18. As shown in FIG. As shown in FIGS. 2 and 3, the hook engaging device 10 includes a support shaft 11, a pair of rotating arms 12 and 13, a pair of connecting arms (connecting portions) 14 and 15, and a pair of link arms ( Mainly includes link portions 16 and 17 and a lock mechanism 18 .

The support shaft 11 is inserted through the through hole 5 of the bracket 4 and extends in the front-rear direction. Each of the pivot arms 12 and 13 is an elongated component. The lower ends of the rotating arms 12 and 13 are rotatably supported by the support shaft 11 . The rotating arms 12 and 13 extend obliquely upward so as to form a first angle θ1 in a natural state. More specifically, the extending directions of the rotating arms 12 and 13 are symmetrical with respect to a vertical line passing through the support shaft 11 on a virtual plane including the vertical direction and the horizontal direction.

The first angle θ1 is an angle at which the distance between the tips of the rotating arms 12 and 13 is larger than the width of the double hook 8 in the horizontal direction. In other words, the first angle θ1 is an angle at which the double hook 8 can move vertically between the rotating arms 12 and 13 . The first angle θ1 is set to 45° to 60°, for example.

The rotating arm 12 is composed of a first plate 21 and a second plate 22 . Both the first plate 21 and the second plate 22 are long plate-like components. The first plate 21 is composed of a main plate 21a and branch plates 21b. The branch plate 21b extends in a direction crossing the extension direction of the main plate 21a between the lower end and the upper end of the main plate 21a.

The lower ends of the first plate 21 and the second plate 22 are rotatably supported by the support shaft 11 . In addition, the first plate 21 and the second plate 22 are arranged at a predetermined interval in the thickness direction (front-rear direction) of the rotating arm 12 . The interval between the first plate 21 and the second plate 22 is set larger than the thickness of the double hook 8 (dimension in the front-rear direction). The first plate 21 and the second plate 22 extend obliquely upward in parallel. Further, the first plate 21 is arranged such that the branch plate 21b protrudes toward the rotating arm 13 side.

The rotating arm 13 is composed of a first plate 23 including a main plate 23a and a branch plate 23b and a second plate 24, similarly to the rotating arm 12. As shown in FIG. Also, the configuration and arrangement of the first plate 23 and the second plate 24 are the same as those of the first plate 21 and the second plate 22 . The first plate 23 is arranged such that the branch plate 23b protrudes toward the rotating arm 12 side.

However, in the thickness direction of the rotating arms 12 and 13, the first plates 21 and 23 are arranged on the opposite sides, and the second plates 22 and 24 are arranged on the opposite sides. More specifically, the second plate 22, the first plate 23, the first plate 21, and the second plate 24 are attached to the support shaft 11 in this order from the front to the rear. When the hook engaging device 10 is viewed from the side, the branch plate 21b is positioned clockwise downstream of the main plate 21a, and the branch plate 23b is positioned counterclockwise downstream of the main plate 23a. .

The connection arms 14 and 15 have a substantially cylindrical outer shape whose diameter gradually decreases from both ends toward the center. The connecting arm 14 connects upper ends of the first plate 21 and the second plate 22 of the rotating arm 12 . The connecting arm 15 connects upper ends of the first plate 23 and the second plate 24 of the rotating arm 13 .

The connecting arms 14 and 15 function as a pair of engaging portions with which the hooks 8a and 8b forming the double hook 8 are engaged. The connecting arms 14 and 15 are pressed by the double hook 8 that moves in the left-right direction (the direction that widens the angle formed by the rotating arms 12 and 13) and functions as a releasing portion that releases the lock by the locking mechanism 18. FIG. The functions of the engaging portion and the releasing portion will be described later.

The link arms 16, 17 have a cylindrical outer shape. The link arms 16,17 are attached to the first plates 21,23. More specifically, the link arm 16 protrudes toward the second plate 22 from the distal end of the branch plate 21b. Further, the link arm 17 protrudes toward the second plate 24 from the tip of the branch plate 23b. The link arms 16 and 17 are pushed by the double hook 8 that enters from above between the rotating arms 12 and 13 forming the first angle θ1. to a second angle θ2.

The second angle θ2 is an angle at which the distance between the tips of the rotating arms 12 and 13 is smaller than the width of the double hook 8 in the horizontal direction. In other words, the second angle θ2 is an angle at which the double hook 8 cannot move upward from between the rotating arms 12 and 13 . The second angle θ2 is smaller than the first angle θ1. The second angle θ2 is set to 15° to 30°, for example.

The lock mechanism 18 locks the rotating arms 12 and 13 at the second angle θ2. The lock mechanism 18 according to this embodiment is arranged between the first plate 23 and the second plate 22 . Although not shown, the lock mechanism 18 is also arranged between the first plate 21 and the second plate 24 .

The lock mechanism 18 is composed of a concave portion 23c and a ball plunger 30, as shown in FIGS. 2 and 4, for example. The recess 23c is formed in the front surface of the first plate 23 (the surface facing the second plate 22). The ball plunger 30 is housed in a recess provided on the rear surface of the second plate 22 (the surface facing the first plate 23).

The ball plunger 30 is composed of a bottomed cylindrical housing 31 , a ball 32 housed inside the housing 31 , and a coil spring 33 that biases the ball 32 toward the opening of the housing 31 . . A ring portion 34 is provided on the outer edge of the opening of the housing 31 to prevent the ball 32 from jumping out. Since the configuration of the ball plunger 30 is already known, detailed description thereof will be omitted.

Ball plunger 30 does not face first plate 23 when pivot arms 12 and 13 are at first angle θ1, and ball plunger 30 does not face first plate 23 when pivot arms 12 and 13 are at second angle θ2. 23c. As a result, in the process of rotating the rotating arms 12 and 13 from the first angle θ1 to the second angle θ2, the ball 32 is pushed by the front surface of the first plate 23 and is retracted into the housing 31, thereby causing the coil spring to rotate. The urging force of 33 causes it to enter the recess 23c. As a result, the lock mechanism 18 locks the pivot arms 12 and 13 at the second angle θ2. In other words, the lock mechanism 18 prevents the pivot arms 12 and 13 from opening from the second angle θ2 to the first angle θ1 only by their own weight.

Next, movement of the hook engaging device 10 will be described with reference to FIGS. 5 and 6. FIG. FIG. 5 shows the state of the hook engaging device 10 in the process of engaging the double hook 8. FIG. FIG. 6 shows the state of the hook engaging device 10 in the process of disengaging the double hook 8. As shown in FIG.

First, when engaging the double hook 8 with the hook engaging device 10, the operator operates the overhead crane to move the double hook 8 above the rotating arms 12 and 13 forming the first angle θ1. Next, the operator lets out the wire and lowers the double hook 8 as shown in FIG. 5(A). As a result, the double hook 8 enters between the rotating arms 12 and 13 from above.

When the double hook 8 is further lowered from the position shown in FIG. 5A, the lower surface of the double hook 8 presses the link arms 16 and 17 downward. As a result, the rotating arm 12 rotates clockwise about the support shaft 11 , and the rotating arm 13 rotates about the support shaft 11 counterclockwise. As a result, as shown in FIG. 5B, the angle formed by the rotating arms 12 and 13 is narrowed from the first angle θ1 to the second angle θ2. Further, as shown in FIG. 4B, the ball 32 enters the concave portion 23c and the rotating arms 12 and 13 are locked at the second angle θ2.

Next, the operator winds up the wire and raises the double hook 8 . As a result, the double hook 8 is engaged with the connecting arms 14 and 15 as shown in FIG. 5(C). More specifically, the hook 8a engages the connecting arm 14 and the hook 8a engages the connecting arm 15. FIG. At this time, the connecting arms 14 and 15 function as a pair of engaging portions.

Then, the operator winds up the wire to separate the vacuum lift 1 from the ground, moves the overhead crane to move the vacuum lift 1 directly above the desired position, and pays out the wire to move the vacuum lift 1 to the desired position. be grounded. Thereby, the vacuum lift 1 fixed to the hook engaging device 10 can be moved to a desired position.

Further, when releasing the engagement of the double hook 8 with the hook engaging device 10, the operator draws out the wire further to lower the double hook 8. As shown in FIG. As a result, the hooks 8a, 8b are disengaged from the connecting arms 14, 15, and the lower surface of the double hook 8 is positioned above the link arms 16, 17, as shown in FIG. 6A.

Next, the operator operates the overhead crane to move the double hook 8 left and right (in the direction of widening the angle formed by the rotating arms 12 and 13). As a result, the connection arms 14 and 15 are pressed in the left-right direction by the shaft portion of the double hook 8, and the lock by the lock mechanism 18 is released. At this time, the connecting arms 14 and 15 function as releasing parts.

As a result, as shown in FIG. 6(B), the rotating arms 12 and 13 are rotated by their own weights in a direction to widen the angle, and come into contact with the support portions 6 and 7 and stop. The angle formed by the rotating arms 12 and 13 at this time is the first angle θ1. The operator then raises the double hook 8 by winding the wire. As a result, the double hook 8 withdraws upward from between the rotating arms 12 and 13 .

According to the above embodiment, for example, the following operational effects are obtained.

According to the above embodiment, by pressing the link arms 16 and 17 downward with the double hooks 8, the pivot arms 12 and 13 can be narrowed from the first angle θ1 to the second angle θ2. Further, by pressing the connecting arms 14 and 15 in the left-right direction with the double hook 8, the rotating arms 12 and 13 can be widened from the second angle θ2 to the first angle θ1. In this way, the rotating arms 12 and 13 can be opened and closed only by the movement of the double hook 8 without relying on human hands or external power, so the attachment/detachment mechanism between the double hook 8 and the rotating arms 12 and 13 is simple. can be realized with a simple configuration.

Further, according to the above-described embodiment, by configuring the rotating arms 12 and 13 with the first plates 21 and 23 and the second plates 22 and 24 that are spaced apart in the thickness direction, the rotating arms 12 and 13 can be rotated. The entering double hook 8 can be prevented from interfering with the rotating arms 12 and 13. - 特許庁Further, by arranging the first plates 21, 23 and the second plates 22, 24 in opposite directions in the thickness direction of the rotary arms 12, 13, interference between the link arms 16, 17 can be prevented.

Further, according to the above-described embodiment, by configuring the lock mechanism 18 using the well-known ball plunger 30, the rotating arms 12 and 13 can be locked and unlocked with a simple configuration. Further, by providing the connection arms 14 and 15 with the function of connecting the first plate 21 and the second plate 22, the function of the engaging portion, and the function of the releasing portion, the hook can be hooked with a simpler configuration. The engagement device 10 can be realized.

Further, according to the above-described embodiment, by supporting the rotating arms 12 and 13 with the common support shaft 11 (single-axis configuration), compared with the two-axis configuration as in Patent Documents 1 to 4, the configuration can be reduced. You can make it even simpler. Further, in the hook engaging device 10 having a uniaxial configuration, a support shaft 11 is attached to the center of the support block 2 in the left-right direction. Here, what is attached to the overhead crane is not limited to the double hook 8, and may be a single hook. In this case, a single hook can be used simply by attaching a suspension ring to the through hole 5 in place of the support shaft 11, so that it is easy to make changes according to the circumstances of the place of use (for example, factory).

Note that the specific structures of the link portion, the engaging portion, the releasing portion, and the lock mechanism are not limited to the examples described above. Further, the lifting and moving of the double hook 8 is not limited to the overhead crane, and a boom type crane may be used. Furthermore, the object to which the hook engaging device 10 is attached is not limited to the vacuum lift 1 .

DESCRIPTION OF SYMBOLS 1... Vacuum lift 2... Support block 3a, 3b, 3c, 3d, 3e, 3f, 3g... Suction pad 4... Bracket 5... Through hole 6, 7... Support part 8... Double hook 8a, 8b... Hook 10... Hook engagement device 11... Support shaft 12, 13... Rotating arm 14, 15... Connection arm 16, 17... Link arm 18... Lock mechanism 21, 23... First plate , 21a, 23a main plate 21b, 23b branch plate 23c recess 22, 24 second plate 30 ball plunger 31 housing 32 ball 33 coil spring 34 ring portion

Claims (7)

A hook engaging device for detachably engaging a double hook,
a single support shaft;
a pair of rotating arms whose lower ends are rotatably supported by the single support shaft and extend obliquely upward so as to form a first angle in a natural state;
a link portion that is pressed by the double hook that has entered between the pair of rotating arms to narrow the angle formed by the pair of rotating arms from the first angle to a second angle that is smaller than the first angle;
a locking mechanism that locks the pair of rotating arms at the second angle;
a pair of engaging portions with which two hooks constituting the double hook are engaged in a state in which the pair of rotating arms are locked at the second angle;
a release unit that is pressed by the double hook that moves in a direction to widen the angle formed by the pair of rotating arms to release the lock by the lock mechanism ;
The pair of rotating arms are
extending from the lower end supported by the support shaft toward the upper end so that the distance between them widens when forming the second angle;
The hook engaging device, wherein the hook engaging device rotates in the direction of expanding to the first angle due to its own weight when the lock by the locking mechanism is released . A hook engaging device for detachably engaging a double hook,
a support shaft;
a pair of rotating arms whose lower ends are rotatably supported by the support shaft and extend obliquely upward so as to form a first angle in a natural state;
a link portion that is pressed by the double hook that has entered between the pair of rotating arms to narrow the angle formed by the pair of rotating arms from the first angle to a second angle that is smaller than the first angle;
a locking mechanism that locks the pair of rotating arms at the second angle;
a pair of engaging portions with which two hooks forming the double hook are engaged in a state in which the pair of rotating arms are locked at the second angle;
a release unit that is pressed by the double hook that moves in a direction to widen the angle formed by the pair of rotating arms to release the lock by the lock mechanism;
Each of the pair of rotating arms
a first plate including a main plate extending obliquely upward and a branch plate extending in a direction crossing the extension direction of the main plate;
a second plate arranged at a predetermined distance from the first plate in the thickness direction of the rotating arm and extending parallel to the main plate;
A hook engaging device, wherein the link portion protrudes from the distal end portion of the branch plate toward the second plate. 3. The hook engaging device according to claim 2, wherein the first plate and the second plate of each of the pair of rotating arms are arranged on opposite sides in the thickness direction. The locking mechanism is
a recess provided in the first plate of one of the rotating arms;
and a ball plunger that is provided on the second plate of the other rotating arm and enters the recess when the angle formed by the pair of rotating arms narrows to the second angle. 4. The hook engaging device according to claim 3, characterized by: 2. Each of the pair of rotating arms includes a connecting portion that connects upper ends of the first plate and the second plate and functions as the engaging portion and the releasing portion. 5. The hook engaging device according to any one of 1 to 4. a support block;
a plurality of suction pads supported by the lower surface of the support block and in close contact with the surface of the object to be conveyed;
A vacuum lift comprising a hook engaging device according to any one of claims 1 to 5 fixed to said support block. The support block is an elongated member that is long in the first direction out of the first direction and the second direction that are perpendicular to each other in the horizontal direction,
7. The vacuum lift according to claim 6, wherein the support shaft extends in the second direction at the center of the support block in the first direction.

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