JPH0740677U - Mounting device for steel rope connecting socket of crane - Google Patents

Abstract

(57) [Abstract] [Purpose] A steel rope terminal is pivoted easily in the pulley storage part at the end of the boom, and the distance between the rotating surface of the steel rope terminal and the adjacent pulley is made small to prevent the hook block from being twisted. At the same time, the lifting load is increased. [Structure] An engaging piece fixed to the inside of the outer plate on the outer periphery of a cylindrical boss portion 2 penetrating the outer plate 1a of the pulley storage part and detachably fixing the seat plate 3 to the outer plate with bolts 20 or the like. 4, an arcuate groove portion 5 which engages with and a notch portion of the cylindrical boss portion with respect to the outer plate with the engaging piece that can be inserted and removed are connected in series so as to change the angular phase, and a trunnion receiver 9 adjacent to the terminal pulley 15. Cooperatively, both side trunnions 8 fixed to the steel rope connecting socket 7
By removing the cylindrical boss portion 2 supporting both ends of the socket from the outer plate, the socket 7 can be removed from the pulley storage portion. The seat plate 3 has an elongated shape, and when the engagement piece 4 and the notch portion match each other, a part of the seat plate projects outside the contour of the outer plate 1a to indicate that the seat plate is not fixed. Good to do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting device for a steel rope connecting socket of a crane for suspending a hook block in a pulley storing portion at the end of a boom via a steel rope, and detachably connecting a steel rope terminal to the pulley storing portion.

[0002]

[Prior art]

 Conventionally, such a device has a steel rope connecting socket D fixed to the end of the steel rope C for suspending the hook block F in the pulley storage portion A at the tip of the telescopic boom B as shown in FIG. By pinning the upper ends of the pair of arms E projecting upward to the bracket attached to the outer plate of the pulley storage part A in a detachable manner, the number of hook blocks and hook hooks can be increased or decreased depending on the load. Since the height difference between the pulley support shaft G at the end of the boom and the connecting portion of the steel rope to the socket D is increased to H, the suspended load is reduced accordingly. Become.

In order to avoid this, the arm E of the steel rope 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 rope connected to the socket is attached to the side surface of the pulley housing A. When the hook block is attached to the suspended position, the distance between the steel rope guide and the end pulley in the pulley housing A adjacent to the steel rope guide becomes large, and the twist of the hook block with respect to the pulley housing increases. As in the case of the hook block storage device described in the conventional technique of Japanese Utility Model Laid-Open No. 3-82389, the hook block is collided with the lower end of the pulley storage portion A of the horizontal boom by winding the steel rope C by the winding drum device. When it is difficult to store the pendulum member, or when the pendulum member K for storing the hook block that is eccentrically attached to the pulley housing portion A is eccentrically attached to the pulley housing portion A, the top surface of the hook block F is attached to the lower surface. When the hook block is stowed along the bottom surface of the boom by winding the steel rope C after the contact engagement, the length of the pendulum member K is shortened as shown in FIG. It will not be possible to increase as much as possible or reduce the deviation of the storage position of the hook block. Also, when a long steel material or a load is lifted, the hook block may be twisted with respect to the pulley storage portion as the load is lifted.

[0004]

[Problems to be solved by the device]

 The problem to be solved is to attach a steel rope end to the pulley storage portion at the end of the boom so that the steel rope terminal can be easily attached and detached, and the gap between the steel rope connection socket and the pulley adjacent to the steel rope connection socket can be prevented from twisting the hook block to the pulley storage portion. It is difficult to reduce the length as much as possible and to shorten the length of the entire steel cord connecting socket to increase the lifting load.

[0005]

[Means for Solving the Problems]

 According to the present invention, a seat plate (3) is fixed to the outer end of a cylindrical boss portion (2) that rotatably penetrates the outer plate (1a) on the side of the pulley storage portion at the tip of the boom, and the seat plate is attached. An arcuate groove portion (5) with which an engaging piece (4) fixed to the inside of the outer plate engages with the outer circumference of a cylindrical boss portion that is in contact with the outer plate, and an outer plate with the engaging piece. And a notch portion (6) of the cylindrical boss portion that can be inserted and removed with respect to each other with different angular phases, and the engaging piece is aligned in the angular phase of the cylindrical boss portion that is engaged with the arcuate groove portion. A seat plate attachment means is detachably attached to the outer plate, and when one of the pair of left and right trunnions (8) fixed to the steel rope connecting socket (7) is fitted into the cylindrical boss part attached to the outer plate, the other Install the trunnion receiver (9) to which the trunnion of The most important feature that the distance between the receiving trunnion was greater than the distance between the free ends of the two trunnion and. The seat plate has a rectangular or elliptical shape, and when the engaging piece fits into the cutout portion of the cylindrical boss, a part of the seat plate protrudes outside the outline of the outer wall of the pulley housing. It is preferable that the cylindrical boss portion and the seat plate are configured so as to indicate that they are not fixed to the outer plate, and the height of the trunnion-attached steel rope connecting socket should be as small as possible.

[0006]

【Example】

 1 to 5 show an embodiment of the present invention, FIG. 1 is an enlarged sectional view taken along line XX of FIG. 3, and FIG. 2 is a sectional view taken along line YY of FIG. As shown in FIG. 3, a telescopic-shaped telescopic boom 10 composed of three boom barrels has a goose-neck-shaped pulley storage portion 12 welded to the tip of a boom barrel 11 and includes a pair of left and right outer plates 1a and 1b. The two plates 14 and 15 are rotatably supported by the pulley support shaft 13 which is horizontally connected in the pulley storage unit by connecting plates 1c. As shown in FIG. 4, the steel rope 16 unwound from the hoisting device on the crane swivel is sequentially passed through the pulley 14, the hook block F pulley 18, the pulley 15, and the hook block F pulley 19 to the steel terminal. The attached steel rope connecting socket 7 has one of the trunnions 8 on both sides thereof fitted into the cylindrical boss portion 2 attached to the outer plate 1a as shown in FIG. 1, and the other trunnion 8 inside the pulley accommodating portion 12. In the end pulley 15 Fitted to Toranio emissions received 9 which is fixed in contact to drop carriage suspending the Futsukuburotsuku F.

The cylindrical boss portion 2 to which the rectangular or elliptical seat plate 3 is fixed is a strip-shaped engagement member that is welded to the inside of the outer plate 1a when the seat plate is in contact with the outer plate 1a. After forming an arcuate groove portion 5 with which the joint piece 4 engages on the outer periphery, a pair of upper and lower parallel surfaces contacting the groove bottom of the arcuate groove portion 5 are cut to the inner end of the cylindrical boss portion 2. Then, the parallel surface is formed in the notch portion 6 (see FIG. 2) in which the cylindrical boss portion 2 can be inserted / removed with respect to the outer plate 1a with the engaging piece. For this reason, the arcuate groove portion 5 and the notch portion 6 are continuously provided on the outer periphery of the cylindrical boss portion 2 with different angular phases of 90 degrees.

The means for attaching the seat plate to the outer plate 1a is such that the outer plate 1a and the seat plate 3 are paired up and down in the angular phase of the cylindrical boss portion in which the engagement piece 4 is engaged with the arcuate groove portion 5. When the engaging piece 4 is engaged with the arcuate groove portion 5, the seat plate 3 fits within the contour of the outer plate 1a as shown in FIG. 3 or 2. When the engaging piece 4 is aligned with the cutout portion 6, a part of the seat plate 3 projects outside the contour of the outer plate 1a as shown by a chain line T in FIG. The fact that the portion 2 is not fixed to the outer plate 1a is easily visible even from a distant position.

FIG. 5 shows a side view of the steel rope connecting socket 7. The straight steel rope portion 16a which starts to transmit a load to the socket 7 is arranged in a direction orthogonal to the curved plane of the steel rope along the tightening wedge 21 thereof. As shown in Fig. 1, the distance between the outer plate 1a and the trunnion receiver 9 intersects with the center line 0 of the pair of left and right trunnions 8 welded near the upper ends of the trunnions 8 and 8 as shown in Fig. 1. Making it big. For this reason, when the cylindrical boss portion 2 is pulled out from the outer plate 1a and one trunnion 8 of the steel rope connecting socket 7 is set in a free state, the other trunnion can be inserted into and removed from the trunnion receiver 9.

The illustrated hook block F has one pulley shaft 24 inserted through a pair of left and right inner and outer plates 22 and 23 forming the pulley support frame 17, and a pulley 18, which is disposed between the inner and outer plates, respectively. 19 is rotatably supported, and both end shaft portions 25a of the hook supporting member 25 are rotatably supported between the lower portions of the left and right inner plates 22, 22, and the hook supporting member 25 has a vertical shaft of a hook 26. The portion 26a is rotatably supported by a nut 27 attached to the upper end of the vertical shaft portion via a thrust bearing.

Reference numeral 28 denotes a pair of front and rear gripping pawls capable of pinching the nut 27 at its lower end. Both gripping pawls 28, 28 are provided with boss portions projecting opposite to each other above the pulley shaft 24, and the boss portions are left. A shaft 29 is pivotally mounted between the right inner plates 22 and 22, and the facing surfaces of the front and rear gripping claws above the boss portion are always formed as inclined faces 28a that open upward, and the lower ends of both gripping claws are opened. An urging spring 30 is attached to the boss. Therefore, each gripping claw 28 rotates about the shaft 29 until it comes into contact with the stopper 31 attached to the pulley supporting frame 17 side when no external force is applied, and the vertical shaft portion 26a of the hook is rotatable.

Further, when the telescopic boom 10 is in the horizontal position, in the pulley storage portion 12 at the front lower part of the pulley support shaft 13, both upper ends of both sides of a pendulum member 32 for storing a front U-shaped hook block are pivoted by pins 33, respectively. A protrusion 34 capable of pushing and opening the inclined surfaces 28a of the front and rear gripping claws is projectingly fixed to the lower surface of the pendulum member 32, and by winding up the hook block F, the left and right outer plates 23, 23 of the pulley support frame, When the top surface of 23 is brought into contact with the lower surface of the pendulum member 32 as shown in FIG. 4, the projections press and open the inclined surfaces 28a, 28a. The nut 27 is clamped and fixed by the lower ends of the front and rear gripping claws. Accordingly, the hook 26 is configured to be fixed to the pulley support frame 17.

The protrusion 34 on the lower surface of the pendulum member has a rectangular cross-sectional outer shape so that the protrusion 34 can be gripped by the inclined surfaces 28a, 28a of the front and rear gripping claws regardless of the front-back or left-right swing of the hook block F to be wound up. A frame-shaped guide member 35 having an inclined guide wall of an inverted truncated quadrangular pyramid shape which can be introduced in between is fixed between the upper parts of the left and right outer plates 23, 23, and the upper ends of the left and right outer plates are pendulum members. The projection 34 is configured to fit into the lower end opening 35 a of the frame-shaped guide member 35 when the lower surface of the 32 is brought into contact with and engaged with.

Therefore, the hook block F, which is wound up to the position shown by the solid line in FIG. 3 and fixedly supports the hook 26 on the pulley support frame 17, is integrally connected to the pendulum member 32. As a result of the winding, the pendulum member and the hook block rotate about the pin 33 to the storage position S shown by the chain line in FIG. 3, and when the self-propelled crane in which the drum of the winding drum device is fixed is traveling, This eliminates the possibility that the frame 17 and the hook 26 may hang down and vibrate to impede the driver's view.

In order to replace the hook block F with a single pulley type hook block during loading and unloading work, when the steel rope connecting socket 7 is removed from the pulley storage portion 12, the weight of the socket 7 and the steel rope connected to the socket 7 is removed from the outer panel. The mounting bolt 20 of the seat plate 3 is removed while supporting the cylindrical boss portion 2 and the trunnion receiver 9 which are inserted in the la plate 1a, and then the seat plate is rotated to the position T shown by the chain line in FIG. 2 with respect to the outer plate 1a. By doing so, the cutout portion 6 of the cylindrical boss portion 2 is made to coincide with the engaging piece 4 on the outer plate side, and the cylindrical boss portion with a seat plate is pulled out from the outer plate 1a. Since the space between the trunnion 8 and the free ends of the trunnions 8 on both sides of the socket 7 is larger than that of the socket 7, the steel rope connecting socket 7 can be removed from the trunnion receiver 9.

On the contrary, when the socket 7 is attached to the pulley housing 12, one trunnion 8 of the socket is inserted into the trunnion receiver 9 and the other trunnion 8 is fitted in the cylindrical boss 2. As described above, the cylindrical boss portion is inserted into the outer plate 1a at an angular phase in which the cutout portion 6 matches the engaging piece 4, and then a part of the engaging piece engages with the arcuate groove portion 5. The seat plate 3 is slightly rotated so that the weight of the socket or the like is supported by the cylindrical boss portion and the trunnion receiver. Then, the bolt insertion holes of the seat plate are aligned with the bolt screw holes of the outer plate, and the two are bolted together. Join at 20.

[0017]

[Effect of device]

 As described above, according to the present invention, the cylindrical boss portion inserted into the outer plate of the pulley storage portion at the tip of the boom is rotated by the seat plate at the outer end in the forward and reverse directions by a constant angle, whereby the cylindrical boss for the outer plate is rotated. The tubular boss and the trunnion receiver fixed in the pulley housing allow both side trunnions of the steel rope connecting socket to be attached and detached. Since the structure for supporting both ends is provided, the steel rope connecting socket is pivotally mounted in the pulley storage portion with ease so that the space between the steel rope connecting socket and the terminal pulley adjacent thereto can be reduced (M in FIG. 1). It is possible to prevent twisting of the hook block that is lifted up to the pulley storage section, and to increase the lifting load as much as possible.

Further, when the cylindrical boss portion is freely inserted into and removed from the outer plate, a part of the seat plate projects out of the contour of the outer plate, and when the cylindrical boss portion is not inserted and removed, the seat plate is outside the outer plate. If it is configured so that it fits within the contour of the plate, if the cylindrical boss or seat plate is not fixed to the outer plate, it can be easily visually recognized from a distance and there is a risk of forgetting to fix the seat plate. There is no effect.

Further, if the linear steel rope portion which starts transmitting the load to the steel rope connecting socket crosses the center line of both trunnions fixed near the upper end portion of the socket, the pulley storage portion from the lower surface of the boom can be accommodated. The effect of being able to further increase the lifting height of the suspended load by reducing the projecting length of.

[Brief description of drawings]

1 is a cross-sectional plan view of an essential part of the present invention-embodiment (X- in FIG. 3);
It is an X sectional view).

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

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

FIG. 4 is a front view of FIG. 3 showing a hooked state.

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

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

[Explanation of symbols]

 1a Outer plate of pulley storage part 2 Cylindrical boss part 3 Seat plate 4 Engaging piece 5 Arc groove part 6 Notch part 7 Steel rope connecting socket 8 Trunnion 9 Trunnion receiver 12 Pulley storage part 16a Steel rope for load transmission to steel string connecting socket Part 20 Bolt 21 Tightening wedge

Claims (3)

[Scope of utility model registration request] 1. An outer plate (1) on the side of the pulley storage section at the end of the boom.
a) a seat plate (3) is fixed to the outer end of a cylindrical boss part (2) that rotatably penetrates the outer peripheral surface of the cylindrical boss part in which the seat plate is brought into contact with the outer plate, An angle is formed between an arcuate groove portion (5) with which an engaging piece (4) fixed to the inside of the outer plate engages and a notch (6) with which the cylindrical boss portion can be inserted into and removed from the outer plate with the engaging piece. Seat plate attachment means is detachably provided to the outer plate, which are consecutively provided in different phases, and in which the engagement piece matches the angular phase of the cylindrical boss portion engaged with the arcuate groove portion,
Further, the trunnion receiver (9) into which the other trunnion fits when the minus one of the pair of left and right trunnions (8) fixed to the steel rope connecting socket (7) is fitted in the cylindrical boss portion attached to the outer plate is accommodated in the pulley. A device for mounting a steel rope connecting socket of a crane, characterized in that the device is mounted in a part so as to be adjacent to the terminal pulley thereof, and the distance between the outer plate and the trunnion receiver is larger than the distance between the free ends of the both trunnions. 2. The seat plate of the cylindrical boss portion is formed into a rectangular shape or an elliptical shape, and when the engaging piece on the outer plate side of the pulley housing portion is aligned with the cutout portion of the cylindrical boss portion, the seat plate of the seat plate is formed. When a part of the seat protrudes out of the outer plate contour of the pulley housing and the engaging piece engages with the arcuate groove of the cylindrical boss, the seat plate fits within the outer plate contour of the pulley housing. The steel rope connecting socket mounting device for a crane according to claim 1, wherein 3. The trunnion is located near the upper end of the steel rope connecting socket so that the straight steel rope portion that starts to transmit a load to the steel rope connecting socket intersects the trunnion center line. Item 1. An attachment device for a steel rope connecting socket of a crane according to item 1 or 2.