JP2592968Y2 - Mounting equipment for steel cable connecting sockets of cranes - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for attaching a steel cable connecting socket of a crane for detachably connecting a steel cable terminal to the pulley housing for hanging a hook block through a steel cable in a pulley housing at the end of a boom.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a steel cable connecting socket D is fixed to a terminal of a steel cable C for suspending a hook block F in a pulley storage section A at the tip of a telescopic boom B, as shown in FIG. The upper ends of a pair of arms E protruding upward from both upper sides of D are detachably pinned P to a bracket attached to the outer plate of the pulley storage section A, so that a hook block or a hook hanging rope according to the load is provided. Since the number can be increased or decreased, the height difference between the pulley support shaft G at the end of the boom and the steel cable connecting portion to the socket D becomes large as shown by H, and the lift of the suspended load decreases accordingly. Will be.

In order to avoid this, the arm E of the steel cable connecting socket D is detachably pinned to an appropriate position on the side surface of the pulley housing A, and the guide of the steel cable connected to the socket is connected to the pulley housing A.
When the hook is mounted at the hook block hanging position on the side surface of the pulley, the distance between the steel cable guide and the end pulley in the adjacent pulley storage section A increases, and the torsion of the hook block with respect to the pulley storage section increases. Became the actual Kaihei 3-82
As in the hook block storage device described in the prior art of Japanese Patent No. 389, it is difficult to retract and store the hook block at the lower end of the pulley storage portion A of the horizontal boom by winding up the steel cable C with the winding drum device. In addition, the hook block F is attached to the lower surface of the hook block storage pendulum member K which is eccentrically attached to the pulley storage portion A and eccentrically from the pulley support shaft G.
When the hook block is retracted along the lower surface of the boom by winding the steel cable C after the top surface of the pendulum is brought into abutment engagement, the length of the pendulum member K is shortened as shown in FIG. It becomes impossible to increase the lifting height of the suspended load as much as possible and to reduce the disorder of the storage position of the hook block. Further, when lifting a long steel material or load, the hook block may be twisted with respect to the pulley storage portion as the load is lifted.

[0004]

The problem to be solved is that a steel cable end is easily attached to and detached from the pulley storage portion at the end of the boom so that the distance between the steel cable connecting socket and the pulley adjacent thereto is reduced. It is difficult to make the hook block small enough to prevent the hook block from being twisted with respect to the pulley storage portion, and to shorten the entire length of the steel cable connecting socket to increase the lifting lift.

[0005]

According to the present invention, a seat plate (3) is provided at the outer end of a cylindrical boss (2) rotatably passing through an outer plate (1a) at the end of a boom on a side of a pulley storage portion. And an arc-shaped groove portion (5) in which an engagement piece (4) fixed inside the outer plate is engaged with an outer periphery of a cylindrical boss portion in which the seat plate is in contact with the outer plate. And a notched portion (6) of the cylindrical boss portion which can be inserted and removed with respect to the outer plate with the engagement piece, are connected in a different angular phase, and the engagement piece is engaged with the arc-shaped groove portion. A cylindrical boss having detachably provided seat plate attaching means to the outer plate which matches the angular phase of the portion, and one of a pair of right and left trunnions (8) fixed to a steel cable connecting socket (7) attached to the outer plate. A trunnion receiver (9), into which the other trunnion fits when fitted in the part, is located in the pulley storage part, adjacent to the terminal pulley. Mounted so that, the most important feature that the distance between the receiving outer plate and trunnion is made larger than the distance between the free ends of the two trunnion. The seat plate is formed in a rectangular or elliptical shape, and when the engaging piece matches the cutout portion of the cylindrical boss portion, a part of the seat plate protrudes outside the outer plate contour of the pulley storage portion, and It is preferable to indicate that the boss portion and the seat plate are not fixed to the outer plate, and the height of the trunnion-attached steel cable connecting socket should be as small as possible.

[0006]

1 to 5 show an embodiment of the present invention.
3 is an enlarged cross-sectional view taken along line XX of FIG. 3, and FIG.
It is a Y sectional view. As shown in FIG. 3, the telescopic boom cylinder 10 includes three boom cylinders.
The gooseneck-shaped pulley storage part 12 welded to the tip of
A pair of left and right outer plates 1a and 1b are integrally connected and fixed to each other by a connecting plate 1c, and two pulleys 14 and 15 are respectively rotated only on a pulley support shaft 13 suspended in the pulley storage portion. As shown in FIG. 4, the steel cable 16 which is freely supported and is fed out from the bobbin device on the crane swivel of the self-propelled crane is connected to the pulley 14, the pulley 18 of the hook block F, the pulley 15, and the pulley 19 of the hook block F in this order. As shown in FIG. 1, one of the two side trunnions 8 of the steel cable connecting socket 7 fitted to the steel cable terminal is fitted into the cylindrical boss portion 2 mounted on the outer plate 1a, and the other trunnion 8 Is the pulley storage unit 1
The hook block F is suspended and supported in the trunnion receiver 9 which is fixed adjacent to the end pulley 15 in the inside.

The cylindrical boss portion 2 to which the rectangular or elliptical seat plate 3 is fixed is a strip-shaped member welded to the inside of the outer plate when the seat plate is in contact with the outer plate 1a. After concavely forming an arc-shaped groove portion 5 with which the mating piece 4 is engaged on the outer periphery, a pair of upper and lower parallel surfaces contacting the groove bottom of the arc-shaped groove portion 5 are cut to the inner end of the cylindrical boss portion 2. , The parallel surface of the outer plate 1a
Notch 6 of cylindrical boss 2 that can be inserted and removed
(See FIG. 2). Therefore, the arc-shaped groove portion 5
The notch 6 and the notch 6 are connected to the outer periphery of the cylindrical boss 2 with a different angle phase of 90 degrees.

The means for attaching the seat plate to the outer plate 1a includes a pair of upper and lower bolts for connecting the outer plate 1a and the seat plate 3 in the angular phase of the cylindrical boss portion in which the engaging piece 4 is engaged with the arc-shaped groove portion 5. When the engaging piece 4 is engaged with the arc-shaped groove portion 5, the seat plate 3 is connected to the outer plate 1a as shown in FIG. 3 or FIG.
When the engagement piece 4 is aligned with the notch 6, the part of the seat plate 3 is partially removed as shown by a chain line T in FIG.
The projection protrudes out of the outline of a so that the seat plate and the cylindrical boss portion 2 are not fixed to the outer plate 1a so that it can be easily visually recognized even from a remote position.

FIG. 5 shows a side view of the steel cable connecting socket 7, in which a straight steel cable portion 16a which starts to transmit a load to the socket 7 is arranged perpendicularly to a curved surface of the steel cable along a tightening wedge 21 thereof. As shown in FIG. 1, the distance between the outer plate 1a and the trunnion receiver 9 is larger than the distance between the free ends of the two trunnions 8, 8 at the intersection with the center line 0 of the pair of right and left trunnions 8 welded near the upper end. doing. For this reason, when the cylindrical boss portion 2 is removed from the outer plate 1a and one of the trunnions 8 of the steel cable connecting socket 7 is in a free state, the other trunnion can be inserted into and removed from the trunnion receiver 9.

The hook block F shown in the drawing has pulleys 18 and 19 disposed on a single pulley shaft 24 inserted between a pair of left and right inner and outer plates 22 and 23 forming a pulley support frame 17 between the respective inner and outer plates. Are pivotally supported, and both end shaft portions 25a of the hook support member 25 are rotatably supported between the lower portions of the left and right inner plates 22, 22, and the vertical shaft portion 26a of the hook 26 is attached to the hook support member. A nut 27 attached to the upper end of the vertical shaft portion is rotatably supported via a thrust bearing.

Reference numeral 28 denotes a pair of front and rear gripping claws capable of pinching the nut 27 at the lower end thereof.
A boss portion is provided above and projecting from the boss portion, and the boss portion is pivotally connected between the left and right inner plates 22, 22 by a shaft 29, and the facing surfaces of the front and rear gripping claws above the boss portion are always inclined upward. A spring 30, which is formed on the surface 28a and opens and biases between the lower ends of the gripping claws, is attached to the boss. For this reason, each gripping claw 28 rotates around the shaft 29 until it comes into contact with the stopper 31 attached to the pulley support frame 17 when no external force is applied, so that the hook vertical shaft portion 26a can be turned.

When the telescopic boom 10 is horizontal, the upper ends of both sides of the front U-shaped pendulum member 32 for storing the hook block are pivoted by pins 33 at a position below and in front of the pulley support shaft 13. And the inclined surface 28 of the front and rear gripping claws.
a and 28a are fixed to the lower surface of the pendulum member 32 so that the top surfaces of the left and right outer plates 23 and 23 of the pulley support frame are raised by winding up the hook block F in FIG.
As shown in FIG.
The nut 27 is clamped and fixed at the lower end of the front and rear gripping claws with the inclined surfaces 28a, 28a pushed open by the projections.
6 is configured to be fixed to the pulley support frame 17.

The cross section of the projection 34 on the lower surface of the pendulum member is formed in a rectangular shape, and the projection 34 is held between the inclined surfaces 28a, 28a above the front and rear gripping claws irrespective of the swing of the hook block F to be wound back and forth and left and right. A frame-shaped guide member 35 having an inverted truncated quadrangular pyramid-shaped inclined guide wall that can be introduced into the inner periphery is fixed between the upper portions of the left and right outer plates 23, 23, and the upper ends of the left and right outer plates are formed by the pendulum member 32. The projection 34 is configured to fit into the lower end opening 35a of the frame-shaped guide member 35 when the lower surface abuts and engages with the lower surface.

For this reason, the hook block F wound up to the position shown by the solid line in FIG. 3 and fixedly supporting the hook 26 on the pulley support frame 17 is integrally connected to the pendulum member 32. As a result, the pendulum member and the hook block rotate about the pin 33 to the storage position S shown by a chain line in FIG. 3, and when the self-propelled crane to which the drum of the winding machine is fixed travels, the pulley support frame 17 and the Hook 2
This eliminates the possibility that the vibrator 6 will hang and vibrate to obstruct the driver's view.

In order to replace the hook block F with a single pulley-shaped hook block or the like during the cargo handling operation, when the steel cable connecting socket 7 is removed from the pulley storage section 12, the weight of the socket 7 and the steel cable connected thereto is applied to the outer plate 1a. While being supported by the cylindrical boss portion 2 and the trunnion receiver 9 inserted through the
Then, by rotating the seat plate to the position T shown by a chain line in FIG. 2 with respect to the outer plate 1a, the notch 6 of the cylindrical boss portion 2 is engaged with the outer plate-side engaging piece. 4, the space between the outer plate and the trunnion receiver 9 is greater than the distance between the free ends of the trunnions 8, 8 on both sides of the socket 7. From the trunnion receiver 9, the steel cable connecting socket 7 can be removed.

On the other hand, when the socket 7 is mounted on the pulley accommodating portion 12, one trunnion 8 of the socket is inserted into a trunnion receiver 9, and the other trunnion 8 is fitted into the cylindrical boss portion 2. As described above, the cylindrical boss portion is inserted into the outer plate 1a at an angular phase at which the notch portion 6 matches the engagement piece 4, and then a portion of the engagement piece is engaged with the arc-shaped groove portion 5. The seat plate 3 is slightly rotated to support the weight of the socket or the like with the cylindrical boss portion and the trunnion receiver. Then, the bolt insertion hole of the outer plate is matched with the bolt insertion hole of the seat plate, and the two are bolted. Join at 20.

[0017]

According to the present invention, as described above, the cylindrical boss portion inserted into the outer plate of the pulley storage portion at the end of the boom is rotated forward and backward at a constant angle by the seat plate at the outer end of the cylindrical boss portion. The cylindrical boss can be inserted into or removed from the plate, and can be prevented from being inserted into or removed from the plate. Since the trunnion is configured to be detachably supported at both ends, the distance between the steel cable connecting socket and the end pulley adjacent thereto is reduced while the steel cable connecting socket is easily pivoted in the pulley storage portion. do it,
The twisting of the hook block suspended from the pulley storage portion can be prevented, and the lift of the suspended load can be increased as much as possible.

In a state where the cylindrical boss portion can be freely inserted and removed with respect to the outer plate, a part of the seat plate protrudes out of the contour of the outer plate. If it is configured to fit within the contour of the board, if the cylindrical boss and the seat plate are not fixed to the outer plate, they can be easily visually recognized from a remote position, and there is a risk of forgetting to fix the seat plate. Has no effect.

Further, if the straight steel cable portion which starts transmitting the load to the steel cable connecting socket intersects with the center line of both side trunnions fixed near the upper end of the socket,
Reduce the protrusion length of the pulley storage section from the bottom of the boom,
This has the effect of further increasing the lift of the suspended load.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view (X-
X sectional view).

FIG. 2 is a sectional view taken along line YY of FIG.

FIG. 3 is a side view of the embodiment of the present invention.

FIG. 4 is a front view of FIG. 3 showing a hang-up state;

FIG. 5 is a side view of a steel cable connecting socket portion.

FIG. 6 is a side view of a conventional device.

[Explanation of symbols]

 1a Outer plate of pulley storage portion 2 Cylindrical boss portion 3 Seat plate 4 Engagement piece 5 Arc-shaped groove portion 6 Notch portion 7 Steel cable connection socket 8 Trunnion 9 Trunnion receiver 12 Pulley storage portion 16a Steel cable for load transmission to steel cable connection socket Part 20 bolt 21 tightening wedge

Claims (3)

(57) [Scope of request for utility model registration] An outer plate (1) on the side of the pulley storage portion at the end of the boom.
a) A seat plate (3) is fixed to an outer end of a cylindrical boss portion (2) rotatably penetrating through a), and an outer periphery of the cylindrical boss portion in which the seat plate is brought into contact with the outer plate, An arc-shaped groove portion (5) in which an engaging piece (4) fixed to the inside of the outer plate is engaged, and a detachable notch (6) of a cylindrical boss portion with respect to the outer plate with the engaging piece are angled. It is provided in a detachable manner with a seat plate attaching means to the outer plate, which is consecutively provided with a different phase, and wherein the engaging pieces match in an angular phase of the cylindrical boss portion engaged with the arc-shaped groove portion,
A trunnion receiver (9) to which the other trunnion fits when the minus side of the pair of right and left trunnions (8) fixed to the steel cable connecting socket (7) is fitted into the cylindrical boss portion attached to the outer plate is housed in the pulley. An installation device for a steel cable connecting socket of a crane, wherein the device is mounted adjacent to a terminal pulley and a distance between the outer plate and the trunnion receiver is larger than a distance between free ends of the two trunnions. 2. The seat plate of the cylindrical boss portion is formed in a rectangular or elliptical shape, and when the engaging piece on the outer plate side of the pulley storage portion matches the cutout portion of the cylindrical boss portion, When the engagement piece engages with the arc-shaped groove portion of the cylindrical boss portion, the seat plate fits within the outer plate contour of the pulley storage portion. 2. A mounting apparatus for a steel cable connecting socket of a crane according to claim 1, wherein 3. The trunnion is located near the upper end of the steel cable connecting socket such that a straight steel cable portion that starts transmitting a load to the steel cable connecting socket crosses the trunnion center line. Item 6. A mounting device for a steel cable connecting socket of a crane according to Item 1 or 2.