JPS63106294A - Overhead travelling crane - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to an overhead crane, and more particularly to an overhead crane installed on a ship.

Conventional technology and its problems Overhead cranes installed in ship holds are suspended from a single point using hoists, chain blocks, etc. For this reason, the lifting equipment and the lifted object to be transported swing due to the rocking of the hull, making it difficult to carry out the work of transporting the object.

An object of the present invention is to provide an overhead crane that solves the above problems.

Means for Solving the Problems In the overhead crane according to the present invention, the upper end of a vertically extendable stabilizer to which the lifting equipment is connected to the lower end is connected to a trolley equipped with a hoisting device having a lifting equipment. It is characterized by

Embodiment FIGS. 1 and 2 show a schematic configuration of an overhead crane installed in a hangar inside a ship.

In the following description, the front refers to the right side of FIG. 1, and the rear refers to the left side of the same figure. The overhead crane is stored
l! In (1), work such as transferring the transported object (-) placed on the hand truck (DA) onto the automatic traveling truck (DB) is performed.

Five vertical rails (2) are provided on the lower surface of the ceiling of the hangar (1) at intervals in the left-right direction and extending in the front-rear direction. These vertical rails (2) support girders (3) that are rectangular in shape when viewed from the plane guided by the vertical rails (2). A pair of left and right sliding winches (4) connected to each other are attached to the upper end of the front wall of the hangar (1). These winches (4) are driven by a drive motor (5). Furthermore, a pair of left and right pulleys (6) are attached to the rear end of the lower surface of the ceiling of the hangar (1). One end of the wire (7) that is hung on the left winch (4) passes through the left pulley (6) and is fixed to the left side of the rear end of the girder (3), and the other end of the wire (7) is attached to the girder (3). 3) is fixed on the left side of the front end. One end of the wire (7) hung on the right winch (4) is
It is fixed to the right side of the rear end of the girder (3) via the right pulley (6), and the other end of the wire (7) is fixed to the right side of the front end of the girder (3). Therefore, the drive motor (5
) by driving the girder (3) onto the vertical rail (
2) can be moved in the front-back direction.

The girder (3) consists of five saddles (8) attached to each vertical rail (2), a pair of front and rear horizontal rails (9) supported by these saddles (8) and extending in the left and right direction, and a pair of horizontal rails (9) on both sides. 1 to lorry (10) arranged between the rails (9) and guided by the horizontal rail (9), a trolley running winch (11) attached to the leftmost saddle (8), and a winch (11). ) and a pulley (13) attached to the rightmost saddle (8).
).

One end of the wire (14) hung on the winch (11) is fixed to the right side of the trolley (10) via the pulley (13), and the other end of the wire (14) is fixed to the left side of the trolley (10). ing. Therefore, by operating the drive motor (12), the trolley (10) can be moved in the left-right direction along the horizontal rail (9).

The trolley (10) is equipped with a bunt graph stabilizer 1a (
30), a hanging device (70), etc. are supported.

Figures 3 to 8 show the trolley (10) and stabilizer (3).
0), details of the hanging tool (70), etc. Trolley (
10) has a case shape with an open bottom, and a case (18) with a built-in hydraulic circuit is attached to both sides. In FIG. 3, the case (18) is omitted. Trolley (
A winch (21) for lowering the sling with a winding prevention device (not shown) is attached to the lower surface of the earthen wall 10), and a hydraulic cylinder (22) for raising and lowering the stabilizer.
is installed. A bottle insertion hole (23) is provided at the lower rear end of both left and right walls of the trolley (10).

Moreover, a bottle guide hole (24) elongated in the front-rear direction is formed at the lower front end of the left and right side walls of the trolley (10).

The stabilizer (30) includes a bottom plate (31) and a bottom plate (31).
) and a pair of left and right bunt graph mechanisms (32) that connect the trolley (10). At the rear end of the bottom plate (31),
A bottle insertion hole (33) extending in the left-right direction is formed. A bottle guide hole (34) is formed at the front end of the bottom plate (31), extending in the left-right direction and having an elongated cross section in the front-rear direction.

Each vantograph mechanism (32) has a first link (36) whose front end is pivotally connected to the end of a bin (35) whose both ends are inserted into both bin guide holes (24) of the trolley (10). , the rear end is pivotally attached to the end of the bottle (37), both ends of which are inserted into the both bottle insertion holes (23) of the trolley (10), and the central length thereof is the length of the first link (36). A bottle (3
8), the rear end of which is pivotally connected to the rear end of the first link (36) by a bottle (40), and a bottle guide hole (34) in the bottom plate (31). A third link (42) whose front end is pivotally attached to the end of the bottle (41) inserted into the bottle (
The front end portion is pivotally connected to the third link (43) by a bottle (44), and the center portion thereof is pivotally connected to the center portion of the third link (42) by a bottle (44), and is inserted into the bottle insertion hole (33) of the bottom plate (31). and a fourth link (46) whose rear end is pivotally connected to the end of the bin (45). Trolley (10
) is inserted into the bottle guide hole (24) of the bottle (35).
The rod (2) of the hydraulic cylinder (22)
The tips of 2a) are connected via a connecting member (47). Therefore, the rod (22) of the hydraulic cylinder (22)
By advancing and retracting a), the stabilizer (30) can be extended and contracted, that is, raised and lowered.

The hanging device (70) is attached to the stabilizer (3).
The male body (52) of the coupling device (50) is removably connected to Connected to wire (48).

The coupling device (50) is connected to the bottom plate (3) of the stabilizer (30).
1), a short cylindrical female body (51) that is penetrated and fixed, and a substantially conical shape that is connected to the lower end of the wire (48) extending from the winch (21) and that can be fitted into the female body (51) from below. It is provided with a shaped male body (52) and a mechanism for detachably connecting the male body (52) to the female body (51).

A temple flange (53) is formed at the lower end of the male body (52) and comes into contact with the lower surface of the female body (51). Approximately at the center of the height of the male body (52), there is an annular groove (54) having an arc-shaped bottom edge in cross section.
) is formed. The female body (51) is fitted into the outer cylinder (55) and the lower half of the outer cylinder (55), and is connected to the male body (5
2) consists of an inner cylinder (56) into which the lower half part fits almost snugly and has a tapered inner circumferential surface; Inner cylinder (56)
Vertical grooves (57) extending in the radial direction are formed at positions 180 degrees apart from each other in the circumferential direction on the upper surface. The outer cylinder (55) is provided with longitudinal holes (58) that are continuous with the respective vertical grooves (57). The side wall of each vertical groove (57) of the inner cylinder (56) has an inner end arranged in the vertical groove (57) and an outer end extending outward of the outer cylinder (55) through the hole (58). The inner end of the lever (59) is pivotally connected to the pin (60).

A cam (59a) that can be injected into the annular shape 14 (54) of the male body (52) when the male body (52) is inserted is integrally formed at the inner end of the lever (59). . A lower end of a coil spring (61) whose upper end is fixed to the inner peripheral surface of the upper part of the outer cylinder (55) is fixed at a position closer to the outer end of the pivot point of the lever (59). This spring (61) biases the lever (59) in a direction of rotation that causes the cam (59a) to fit into the annular groove (54).

By fitting the cam (59a) into the annular groove (54), the male body (52) is connected to the female body (51), thereby connecting the hanger (10) to the stabilizer (30).

When the outer end of the lever (59) is pushed down against the biasing force of the spring (61), the cam (59a) separates from the annular groove (54) of the male body (52) and engages the male body (52). Female body (51)
The connection with is canceled.

The hanger (70) includes a vibrator (71) extending in the front-rear direction and an engagement device mounting body (71) protruding downward from the vibrator (71).
72), a pair of front and rear engagement devices (73) attached to the front and rear ends of the engagement device attachment body (72), and a front and rear pair of engagement devices (73) attached to the front and rear ends of the vibrator (71). A pair of stable support devices (74) are provided.

A bracket (75) projecting upward is provided at the center of the length of the vibrator (71). Engagement device mounting body (7
2) consists of a pair of left and right plates (17) arranged at intervals. The engagement device 73) is provided between both plates (77),
A hook (79) is pivotally connected to both plates (77) by a pin (78) and can be engaged with a lifting eye (■) provided on an object to be transported. The end is a board (7
7) and a coil spring (8o) that biases the hook (79) in the release direction, and a shaft portion (83) pivotally connected to both plates (77) between both plates (77). and a cam (8) for controlling the locking and releasing of the hook (79) υ).
2), on the outside of one plate (77), -a is at an eccentric position on the end surface of the shaft of the cam (82), and the other end is on the plate (77).
a coil spring (83) for holding the cam (82) in a position for locking the hook (79) and a position for releasing the hook (79); The lever (84) is connected to the end of the shaft (81) on the outside of the plate (77).

By rotating the lever (84) in the direction of the arrow in FIG. 7, the hook (79) can be placed in the release position, and from the release position, the lever (84) can be rotated in the opposite direction to the arrow. By Hook (79)
can be placed in the locked position.

The stable support device @ (74) consists of a pair of left and right support arms (85) extending diagonally downward from both sides of the vibrator (71) and arranged in the shape of a letter when viewed from the front, and the tips of both support arms (85). A pair of left and right threaded rods (87) whose upper parts are screwed together with female threaded members (86) attached to each other and which are arranged in reverse when viewed from the front; and a cushioning material (88) that is brought into contact with the conveyed member.

The tilt angle adjustment device (90) includes a pair of left and right cranks (91) that extend forward from the lower surface of the male body (52) and whose rear ends are pivoted to both sides of the bracket (75), and both cranks (91). The front ends of the two cranks (9
1), and a vertical screw hole (92) formed in the center of the length of the connecting member (92).
3) is provided with a threaded rod (95) whose intermediate length is screwed together and whose lower end is connected to the front end of the pipe (71) via a ball joint (94).

An operating handle (96) is provided at the upper end of the threaded rod (95). By rotating the handle (96), the tilt angle of the hanger (70) is adjusted.

FIG. 9 shows a hydraulic circuit for driving the winch for lifting the hoist (21) and the hydraulic cylinder for lowering the stabilizer fR (22). The winch (21) has deceleration 1 (
It is driven by a hydraulic motor (102) connected to the winch (21) via a winch (21).

The hydraulic motor (102) has a 4-point, 3-position switching valve (10
3) via the hydraulic pump (104) and tank (10
51. The pump (104) is driven by an electric motor (10G), and its discharge port is connected to the oil pipe (104).
07) to the boat (P) of the switching valve (103). The boat (R) of the switching valve (103) is connected to the tank (105) via an oil pipe (108). The boat (A) of the switching valve (103) is an oil pipe (109)
It is connected to the forward rotation (for hoist lifting) pressure oil supply port of the hydraulic motor (102) through the boat (
B) is a hydraulic motor (103) via an oil pipe (110).
Connected to the oil supply port for reversing (lowering the lifting equipment).

The oil pipe (109) is provided with a counter balance valve (111) to prevent the hanging device (70) from descending rapidly.

A check valve (112) is connected between both ends of the valve (111) to allow pressure oil to pass only in the direction from the switching valve (103) toward the normal rotation pressure oil supply port of the hydraulic motor (102).

When the switching valve (103) is switched from the neutral position to the switching position U, pressure oil from the pump (104) flows into the switching valve (10
3) to the normal rotation oil supply port of the hydraulic motor (102), the hydraulic motor (102) rotates in the normal direction, and the winch (21) raises the hanging tool (7o). When the switching valve (103) is switched from the neutral position to the switching position, pressure oil from the pump (104) flows into the switching valve (103).
The oil is sent to the reversing oil supply port of the hydraulic motor (102) through the
21), the hanging tool (70) is lowered.

The hydraulic cylinder (22) has a 4-bottom 3-position switching valve (11).
3) via the hydraulic pump (114) and tank (10
5). The pump (114) is a pump (
104), it is driven by an electric motor (106). The discharge port of the pump (114) is an oil pipe (115)
It is connected to the boat (P) of the switching valve (113) via. The boat (R) of the switching valve (113) is connected to the oil pipe (11
6) to the tank (105). The boat (A) of the switching valve (113) is connected to the piston head side oil chamber (2) of the hydraulic cylinder (22) via the oil pipe (117).
2h), and the boat (8) of the switching valve (113) is connected to the piston rod side oil chamber (22r) of the hydraulic cylinder (22) via an oil pipe (118). In the switching valve (113), when it is in its neutral position, the boats (A), (B) and (R) are connected to each other.

The oil pipe (117) is equipped with a counterbalance valve (119) to prevent the stabilizer (30) from descending rapidly.
) is provided. A check valve (120) that allows pressure oil to pass only in the direction toward the oil chamber (22h) through the switching valve (113) is connected between both ends of the counterbalance valve (119). Also, oil pipes (117) and (118)
are 4 through bypass pipes (1210122) respectively.
It is connected to a two-position switching valve (123). The boat (P) of the switching valve (123) is connected to the tank (105) via the oil pipe (124), and the boat (R) is connected to the oil pipe (
125) to an oil pipe (124). The other ends of the bypass pipes (121) and (122), one end of which is connected to the oil pipes (117) and (118), respectively, are
They are connected to the boats (A) and (B) of the switching valve (123), respectively. When the switching valve (123) is switched to the operating position, the oil chambers (22h) and (22r) are communicated with each other.

When the switching valve (123) is in the inoperative position and the switching valve (113) is in the neutral position, the counter balance valve (11
9), the hydraulic cylinder (22) is locked. When the switching valve (123) is in the non-operating position, the switching valve (123)
13) is switched to the switching position, the pump (114)
) from the selector valve (113) and check valve (120).
) to the oil chamber (22h), so the rod (2
2a) advances and the stabilizer (30,) rises.

When the switching valve (123) is in the non-operating position, the switching valve (
When the pump (113) is switched to the switching position, the pump (113) is switched to the switching position.
Pressure oil from the oil chamber (2) passes through the switching valve (113).
2h), the rod (22a) retracts and the stabilizer (30) descends.

In order to transfer the object on the manual dolly (DA) onto the automatic traveling dolly (08) using the above-mentioned overhead crane, first, the stabilizer (30
) to which the hanging device (70) is connected. Winch for girder travel (
4) and the trolley traveling winch (11) to move the girder (3) and the trolley (10), and move the trolley (
10) is positioned directly above the object (edge) to be lifted. Operate the switching valve (i23) and switch the switching valve (12).
3) to the operating position.

As a result, the stabilizer lifting hydraulic cylinder (22)
Both oil chambers (22h) and (22r) are connected to each other.

The switching valve (103) is switched to the switching position and the winch (21) for lowering the hanging shell is driven to lower the hanging tool (70) onto the object to be transported (-). At this time, the stabilizer (30) to which the hanging device (70) is connected has both oil chambers (22h) (22r) of the hydraulic cylinder (22) in communication with each other, so the stabilizer (30) ,
Due to the weight of the connecting device (50) and the hanging tool (70), it descends as the hanging tool (70) descends.

After lowering the hanging device (70) to the top of the transported object (14), the male body (52) and the female body (51) are connected by pushing down the lever (59) of the coupling device @ (50). Let it be canceled. Thereby, the hanger (10) becomes rotatable. Adjust the rotational angle position of the hanger (70) so that both hooks (79) are at a position where they can be respectively locked on both daylight eyes (I), and also adjust the handle (96) of the tilt angle adjustment device (90). The inclination angle of the hanging tool (70) is adjusted by operation. Then, by operating the lever (84), both hooks (79) are respectively engaged with both upper eyes (1). In addition, by adjusting the protruding length of each threaded rod (87) of the stable support device 5 (74), the cushioning material (88) fixed to each threaded rod (87) is brought into contact with the transported object (-). Let them come into contact with you.

After this, the male body (52) is reconnected to the 1i body (51). Then, the switching valve (103) is switched to the switching device U, the winch (21) is driven, and the hanging tool (7o) is raised. At this time, the stabilizer (30) is also attached to the hanging tool (
70) increases with the upper bound of In this way: After lifting the object to be transported (-), use the girder lifting winch (4
) and the winch for lifting and lowering the trolley (11).
8) Position it directly above. Next, the above-mentioned hanging tool (7
0) Using the same operation as when lowering, lower the transported object (formerly) to the top of the automatic traveling trolley (08), and
Perform positioning. Then, the lever (84) is operated to remove the hook (79) from the lifting eye (1). As a result, the object to be transported (the old movement work is completed).

In the above-mentioned overhead crane, the hanging shell (70) is connected to the stabilizer (30) and is raised and lowered together with the stabilizer (30), so that even when the ship is rocking, the lifting gear (70) is attached to the ship. Since it does not swing, the transported object (-
) Transportation work becomes difficult. In addition, a stable support device (
74) prevents the transported object (14) from rolling relative to the hanger (70), making the transporting work even easier.

Further, it is also possible to separate the hanging device (70) from the stabilizer (30) and carry out the work of transporting the transported object (14). In this case, switch the switching valve (113) to switching position U to raise the stabilizer (30) to the upper limit position, then return the switching valve (113) to the neutral position and move the stabilizer (30) to the upper limit position. to lock. Hanging equipment (10
) is raised and lowered by operating the switching valve (103).

When the hanging device (TO) is cut and propagated from the stabilizer (30), the stabilizer (30) can be raised and lowered by operating the switching valve (113). Also,
From the state in which the sling (70) is separated from the stabilizer (30), the sling (70) is attached to the stabilizer (30).
), attach the sling (70) to the winch (21).
The male body (52) may be inserted into the female body (51). In other words, the male body (52) is the female body (51).
When entering from below, the cam (59a) is pushed up by the upper part of the male body (52), and when the groove (54) of the male body (52) is at the height of the cam (59a), the spring is released. (
The cam (59a) is automatically fitted into the groove (54) by the biasing force of the groove (61).

Effects of the Invention In the overhead crane according to the present invention, the upper end of the vertically extendable stabilizer +f, to which the lifting equipment is connected to the lower end, is connected to a trolley equipped with a hoisting device having a lifting equipment, so that Even if an overhead crane is installed in a swinging warehouse, such as a @ warehouse installed inside a structure,
Since the hanger no longer swings relative to the warehouse, it becomes easier to transport objects.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention; FIG. 1 is a plan view of a hangar equipped with an overhead crane, FIG. 2 is a side view of the hangar, and FIG. 3 shows details of the trolley, stabilizer, coupling device and lifting equipment. Figure 4 is an enlarged front view showing details of the trolley, stabilizer, coupling device and hanging equipment;
The figure is an enlarged partially cutaway side view showing details of the coupling device and the hanging device, FIG. 6 is an enlarged partially cutaway front view showing details of the coupling device and the hanging device, and FIG. 7 is the details of the engagement device. FIG. 8 is a partially enlarged side view, FIG. 8 is a sectional view taken along the line ■-■ in FIG. 7, and FIG. 9 is a hydraulic circuit diagram for driving the winch for lifting the hanging shell and the hydraulic cylinder for lifting the stabilizer. (1)...Hangar, (10)...Trolley, (30)
... Stabilizer, (50) ... Connection device, (70
)...Hanging shellfish. that's all

Claims (1)

[Claims] An overhead crane in which the upper end of a vertically extendable stabilizer, the lower end of which is connected to a hoist, is connected to a trolley equipped with a hoisting device having a hoist.