JP2019142717A - hook - Google Patents

Abstract

To provide a hook that has high effect of preventing a rope from coming off due to a puzzle-ring phenomenon.SOLUTION: The hook according to one embodiment of the invention has a base end part, a tip part, and a hook-shaped part curved in a U-shape from the base end part to the tip part, which comprises: a latch one end of which is supported on the base end part turnably and the other end of which approaches the tip part and opens and closes an opening part of the hook-shaped part; and a lock member arranged between the latch and the base end part. The lock member inhibits turning of the latch in a state where the other end of the latch is in proximity to the tip part. Preferably, the lock member includes a member for releasing the inhibition of the turning. Preferably, the latch has at least a top surface and a pair of side surfaces, and the top surface of the other end of teh latch and the pair of side surfaces of the latch cover the tip part in a state where the other end of the latch is proximity to the tip part. Preferably, the other end of the latch does not protrude from the outside of the tip part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hook.

  As a hook for a crane or the like, there is known a hook that is rotatably supported by a proximal end portion of a hook and that has a stopper that is urged so that a distal end thereof is pressed against an inner edge on a distal end side of the hook body.

  However, even when a hook having such a locking mechanism is used, the rope passing through the hook sag and the portion extending from the hook is folded back to the upper side of the locking mechanism. May cause the rope to push open the hook and come off the hook. Rope detachment due to such a mechanism is generally called “wisdom wheel phenomenon” or “back slip phenomenon” and is recognized as a dangerous event that can cause a serious accident. More specifically, when a part of a suspended load is landed, the eye of the sling wire rope twists and moves to the upper side of the hook detachment, causing an accident that pushes down the detachment and falls off. Yes.

  In order to prevent the rope from coming off due to such a wisdom ring phenomenon, for example, in Japanese Patent Laid-Open No. 2001-253679, it is pivotally supported coaxially with a detachment prevention (main detachment prevention), and is attached to the tip of the hook body or the outer edge of the tip part. There has been proposed a hook provided with a disengagement prevention tool (sub-disengagement stop) that abuts by its own weight or spring force.

JP 2001-253679 A

  In the hook described in the above publication, since the tip of the detachment prevention device protrudes outside the tip of the hook, the rope lifts the protruding portion of the detachment prevention device and pushes the detachment prevention device to open the main prevention device. The rope may enter and the rope may come off the hook. That is, the hook described in the above publication cannot completely prevent the rope from coming off due to the wisdom ring phenomenon.

  In view of the above inconveniences, an object of the present invention is to provide a hook that is highly effective in preventing the rope from coming off due to the wisdom ring phenomenon.

  One aspect of the present invention made to solve the above problems is a hook having a base end portion, a tip end portion, and a hook-like portion that curves in a U shape from the base end portion to the tip end portion. One end of which is rotatably supported by the base end portion, the other end is close to the tip end portion, and a stopper that opens and closes the opening of the bowl-shaped portion, and between the stopper and the base end portion. A locking member disposed, and the locking member prevents rotation of the locking member in a state where the other end of the locking member is close to the tip.

  The hook is provided with a stopper and a locking member. When the other end of the locking member comes close to the tip of the hook, the locking member stops the rotation of the locking member. Therefore, since the wire rope outside the hook is prevented from entering the hook, the wisdom ring phenomenon can be prevented.

  The lock member may include a member that releases the rotation restraint. Since the release member can be easily turned by the releasing member, a sling wire rope or the like hung inside the hook can be easily removed from the hook.

  The detachment stop has at least a top surface and a pair of side surfaces, and the top surface and the pair of side surfaces at the other end of the detachment cover the tip portion in a state where the other end of the detachment stop is close to the tip portion. Good. The strength against the lateral load of the detent can be improved by covering the tip with the other end in the state where the other end of the detent is close to the tip of the hook.

  It is preferable that the other end of the stopper does not protrude from the outside of the tip portion. Since the other end of the stopper does not protrude from the outside of the tip of the hook, it is possible to prevent the wire rope outside the hook from lifting the other end of the stopper. Can be prevented.

  The other end of the detachment stopper may have a recess that engages with the inner surface of the tip. Since the other end of the stopper has a recess that engages with the inner surface of the hook tip, the strength against the lateral load of the stopper can be further improved.

  With the other end of the locking stopper in proximity to the distal end and the other end of the locking stopper in proximity to the leading edge, the locking mechanism is fixed to the base end by penetrating the locking stopper. Further, it is preferable to further include a penetration pin that can prevent the rotation. In this way, by further including a penetration pin that can prevent the rotation of the locking mechanism by penetrating the locking mechanism, even if a malfunction occurs in the locking member, the locking mechanism prevents the locking mechanism from rotating. Stopping it can prevent the wisdom ring phenomenon.

  It is good for the said detent | stop to be comprised so that accommodation of the said penetration pin is possible. In this way, by configuring the above-mentioned stopper so that the through pin can be accommodated, it is possible to prevent the through pin from obstructing the work using the hook when the lock member functions normally, and the above When a malfunction occurs in the lock member, the wisdom ring phenomenon can be prevented from occurring by quickly taking out and using the penetrating pin. Therefore, the working efficiency of the hook can be increased.

  As described above, the hook according to one embodiment of the present invention is highly effective in preventing the rope from coming off due to the wisdom ring phenomenon.

It is a typical side view showing a hook of one embodiment of the present invention. It is a typical rear view which shows the back surface of the come-off prevention of FIG. It is typical sectional drawing which shows the AA cross section of FIG. It is a typical side view which shows the state by which the lock member was arrange | positioned at the come-off prevention of FIG. It is a typical bottom view which shows the lower surface of the come-off prevention in which the locking member of FIG. 4 is arrange | positioned. It is the schematic which shows the state before the locking member of FIG. It is the schematic which shows the state after the locking member of FIG. It is a typical side view which shows the hook which concerns on embodiment different from FIG. It is a typical perspective view which shows the state which penetrated the penetration pin to the base of the hook of FIG. It is a typical front view which shows the state which penetrated the penetration pin to the base of the hook of FIG. It is a typical back view which shows the state which accommodated the penetration pin in the stopper with the hook of FIG. It is typical sectional drawing which shows the BB cross section of FIG.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

[hook]
As shown in FIGS. 1 and 2, a hook 1 according to an embodiment of the present invention includes a base end portion 2 connected to a tip end of an arm constituting a work attachment of a construction machine, and the base end portion 2. And a distal end portion 4 integrally formed on the side opposite to the base end portion 2 of the flange-shaped portion 3. Specifically, the base end 2 is connected to the tip of a wire rope or the like that is fed out from a winch provided in a crane or the like. The hook-shaped portion 3 is curved in a U shape from the base end portion 2 to the tip end portion 4 so that the tip end portion 4 faces the base end portion 2 side, and forms a portion for hanging a sling wire rope, a hanging ring, etc. An opening of the hook 1 is formed between the distal end portion 4 and the proximal end portion 2. The tip 4 is tapered toward the end. In FIG. 1, the distal end portion 4 increases the distance from the proximal end portion 2 toward the end, but the end of the distal end portion 4 may be formed substantially perpendicular to the proximal end portion 2, You may form so that the distance from the base end part 2 may be reduced.

  The hook 1 includes a stopper 5 that opens and closes the opening, and a base 11 that is disposed at the base end 2 of the hook 1. The hook 1 has a rib 7 including a through hole through which the base pin 6 is inserted in the base end portion 2.

<Release stop>
One end of the stopper 5 is rotatably supported by the base end portion 2, and the other end is close to the distal end portion 4, and opens and closes the opening of the bowl-shaped portion 3. In this embodiment, the stopper 5 has a top surface 8 and a pair of side surfaces 9, and has a through-hole through which the stopper shaft 10 is inserted at one end of the pair of side surfaces 9.

  In the present embodiment, the stopper 5 is rotatably supported by the base end portion 2 via the base 11. Specifically, the base 11 has a through hole through which the base pin 6 is inserted, and the base 11 is inserted into the through hole provided in the through hole and the rib 7 of the hook 1 so that the base 11 is hooked 1. It is arrange | positioned at the base end part 2. The base 11 further has a through-hole through which the detachment rotating shaft 10 is inserted at the upper end portion. The anti-rotation shaft 10 is inserted through a through hole provided on one end side of the pair of side surfaces 9 of the anti-lock 5 and a through hole through which the anti-rotation shaft 10 of the base 11 is inserted. It is supported rotatably. As described above, when the locking shaft 10 is positioned above the base pin 6, the tilt of the locking 5 is increased when the locking 5 is attached to the base end 2 of the hook 1. Can do. Specifically, the gradient from one end to the other end of the locking stopper 5 becomes tight, and the wire rope outside the hook 1 can be prevented from getting on (locking to) the locking stopper 5.

  It is preferable that the other end of the stopper 5 does not protrude from the outer side (outer edge) of the tip portion 4 of the hook 1. Specifically, the stopper 5 is arranged so that the other end of the stopper 5 and the apex of the tip 4 of the hook 1 coincide with each other, or the other end of the stopper 5 is the tip of the hook 1. It is arranged in the vicinity of the apex of the portion 4 and close to the inside (inner edge) of the tip portion 4. By arranging in this way, it is possible to prevent the wire rope outside the hook 1 from lifting the tip of the other end side of the stopper 5.

  It is preferable that the top surface 8 and the other ends of the pair of side surfaces 9 cover the tip portion 4 of the hook 1 with the other end of the stopper 5 being close to the tip portion 4. By forming the pair of side surfaces 9 so as to cover the tip 4 of the hook 1 on the other end side of the stopper 5, the strength against the lateral load of the stopper 5 can be improved, and the outside of the hook 1 can be improved. It is possible to more effectively prevent the wire rope from entering the hook 1.

  Since the other end of the stopper 5 is close to the tip 4 of the hook 1, it is preferable to have a recess 12 for engaging with the tip 4. By engaging the recess 12 with the tip 4 of the hook 1, the strength against the lateral load of the stopper 5 can be further improved. Note that “proximity” is intended to be in a state of being slightly separated from the distal end portion 4 although it is preferable that the other end of the stopper 5 is in contact with the distal end portion 4 of the hook 1.

  As shown in FIG. 2, the locking member 5 is formed on the back surface of the top surface 8, that is, on the surface facing the base end 2 side of the hook 1 when the locking plate 5 is attached to the hook 1. Has a plate 14 for disposing. The plate 14 may be formed integrally with the stopper 5, or may be formed separately and may be joined by a known method such as welding or a bolt. As shown in FIG. 3, the plate 14 has an inclined surface so that a part thereof is substantially horizontal toward the base end portion 2 of the hook 1. The plate 14 is not limited to the plate shape as in the present embodiment, but can be configured to be disposed on the stopper 5 and to be able to mount the lock member 13. For example, the plate 14 has a rectangular parallelepiped shape or a triangular pyramid shape. A three-dimensional shape can also be used.

  The hook 1 opens the hook 1 by rotating the other end of the stopper 5 above the tip 4 of the hook 1, and a slinging wire rope, a hanging ring or the like enters the opening 1 and hangs inside the hook 1. be able to.

<Base>
The base 11 is attached to the rib 7 of the hook 1 and supports the detachment stopper 5 in a rotatable manner. The base 11 has an arm 15 that engages with the lock member 13. The arm 15 may be formed integrally with the base 11 or may be formed separately and joined by a known method such as welding or a bolt. The arm 15 is a substantially U-shaped rod-shaped member having an upper portion and a lower portion that are substantially horizontal and a central portion that is substantially vertical. The lock member 13 engages with the central portion (vertical portion). The lock member 13 and the arm 15 are preferably in an appropriate positional relationship when engaged. In this embodiment, when the other end of the stopper 5 comes close to the tip 4 of the hook 1 of the hook 1, the lock member 13 disposed on the inclined portion of the plate 14 becomes substantially horizontal, and the vertical portion of the arm 15 The lock member 13 and the arm 15 are disposed so as to engage with each other. The upper and lower ends of the arm 15 are preferably close to the proximal end 2 of the hook 1. If the upper and lower ends of the arm 15 are not close to the base end 2 of the hook 1, the wire rope outside the hook 1 is caught between the end and the base 2 and the arm 15 is deformed or damaged. There is a risk that.

<Lock member>
The lock member 13 is disposed between the stopper 5 and the base end 2, and prevents the stopper 5 from rotating in a state where the other end of the stopper 5 is close to the distal end 4. More specifically, the lock member 13 is disposed on the back surface of the top surface 8 of the stopper 5. When the other end of the stopper 5 comes close to the tip 4 of the hook 1, the lock member 13 engages with the arm 15 of the base 11 and stops the rotation of the stopper 5.

  The lock member 13 preferably includes a member that releases the restraining of the rotation of the stopper 5. That is, it is preferable to have a member for releasing the engagement between the lock member 13 and the arm 15, and this makes it easy to turn the stopper 5, so that a sling wire rope hung inside the hook 1 or the like Can be easily removed from the hook 1.

  In this embodiment, as shown in FIGS. 4 and 5, the lock member 13 is disposed on the plate 14 of the stopper 5, and includes a rotation member 16, a release member 17, and a pair of holding members 18. The pair of holding members 18 sandwich the rotating member 16 and the release member 17 in a rotatable manner. The rotating member 16, the releasing member 17, and the pair of holding members 18 are disposed on the plate 14 by a known joining means such as a bolt. In addition, the lock member 13 may be arrange | positioned at the lower surface of the plate 14 like FIG. 4, and may be arrange | positioned at the upper surface. Moreover, the structure which makes the holding member 18 one and the holding member 18 hold | maintains the rotation member 16 and the cancellation | release member 17 from one side may be sufficient.

  A state where the lock member 13 stops the rotation of the stopper 5 will be described below. FIG. 6 shows a state in which the other end of the stopper 5 is separated from the distal end portion 4 of the hook 1, and the lock member 13 and the arm 15 are separated from each other. The rotation member 16 and the release member 17 have a recess that holds the arm 15 on one side thereof. The release member 17 has a projecting portion 19 on the side facing the one side having the recess. In a state where the lock member 13 and the arm 15 are separated from each other, the rotating member 16 and the release member 17 are urged by known urging means such as a spring so that the respective concave portions are directed to the arm 15. Good.

  When the other end of the stopper 5 comes close to the tip 4 of the hook 1, the arm 15 enters the recess of the rotating member 16 and presses the recess to rotate the rotating member 16. The rotating member 16 rotates and presses the release member 17 to rotate in the direction opposite to the rotating direction of the rotating member 16. Where the respective recesses of the rotation member 16 and the release member 17 surround the arm 15, the rotation of the rotation member 16 and the release member 17 is stopped, the lock member 13 and the arm 15 are engaged, and the rotation prevention 5 is rotated. Is stopped.

  As shown in FIG. 7, the release prevention 5 is released by pressing the protruding portion 19 of the release member 17 in the direction opposite to the rotation direction when the lock member 13 and the arm 15 are engaged. The recesses of the rotating member 16 and the releasing member 17 are made to rotate by releasing the arm 15. Known means such as a ratchet mechanism can be used to stop and release the rotation of the rotation member 16 and the release member 17.

<Advantages>
Since the hook 1 has a lock member 13 that stops the rotation of the stopper 5 when the other end of the stopper 5 comes close to the tip 4 of the hook 1, the wire rope outside the hook 1 is prevented from falling off. 5 can be rotated to open the hook 1 and prevent entry into the hook 1. Therefore, the wisdom ring phenomenon can be effectively prevented. Further, since the restraining of the rotation of the stopper 5 can be easily released, the rope hung on the hook 1 can be easily removed.

  Further, since the hook 1 is provided with the stopper 5 and the lock member 13 on the base 11, if the stopper 5 and the lock member 13 are attached to the base 11 in advance, the base 11 is connected to the base end of the hook 1. The hook 1 can be completed by attaching to 2. For this reason, the hook 1 can be assembled relatively easily. In addition, the hook 1 can be obtained by mounting a base 11 on which the stopper 5 and the lock member 13 are arranged in place of the stopper provided on the existing hook.

[Second Embodiment]
Hereinafter, the second embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

  A hook 20 shown in FIG. 8 is a hook having a proximal end portion 2, a distal end portion 4, and a hook-shaped portion 3 that curves in a U shape from the proximal end portion 2 to the distal end portion 4. The proximal end portion 2, the distal end portion 4 and the hook-like portion 3 are the same as the hook 1 shown in FIG.

  One end of the hook 20 is rotatably supported by the base end portion 2, the other end is close to the tip end portion 4, and a stopper 5 that opens and closes the opening of the bowl-shaped portion 3, the stopper 5 and the base end And a locking member 13 disposed between the portions 2. The lock member 13 stops the rotation of the stopper 5 in a state where the other end of the stopper 5 is close to the tip 4.

  In addition, the hook 20 includes a base 11 disposed at the proximal end portion 2 of the hook 20, and the stopper 5 and the base 11 are viewed in a side view with the other end of the stopper 5 being close to the tip portion 4. The overlapping portion has a through hole 21 that penetrates the stopper 5 and the base 11.

  Since the stopper 5, the base 11, and the lock member 13 are the same as the hook 1 shown in FIG. 1 except for the above-described through hole 21, the same reference numerals are given and detailed description is omitted.

<Penetration pin>
As shown in FIGS. 9 and 10, the hook 20 is inserted into a through hole 21 (see FIG. 8) that penetrates the stopper 5 and the base 11 with the other end of the stopper 5 being close to the tip 4. The through pin 22 is provided. Since the base 11 is attached and fixed to the rib 7 of the hook 20, the stopper 5 can be fixed by inserting the through pin 22 into the through hole 21. That is, the penetration pin 22 fixes the detachment stopper 5 to the base end portion 2 by penetrating the detachment prevention 5 in a state where the other end of the detachment prevention 5 is close to the distal end portion 4, and can prevent the rotation. .

  The shape of the through pin 22 is not particularly limited, but may be, for example, a cylindrical shape that can be inserted into the through hole 21. As for penetration pin 22, it is preferred that the front-end | tip part becomes thin as it approaches the front-end | tip so that it may be easy to insert in penetration hole 21.

  Moreover, it is preferable that the hook 20 has a retaining spring 23 that prevents the penetration pin 22 from falling off, as shown in FIGS. 9 and 10. One end of the retaining spring 23 is fixed to the base end portion of the penetrating pin 22, is formed in a loop shape on the one end side, and is biased so that the other end is separated from the tip end of the penetrating pin 22. Further, the other end side of the retaining spring 23 is formed in a U-shape, and is configured such that the U-shaped opening can be engaged with the tip of the penetrating pin 22.

  When the rotation of the stopper 5 is restrained by the through pin 22, after the through pin 22 is inserted into the through hole 21 with the U-shaped opening of the retaining spring 23 being detached from the through pin 22, The U-shaped opening of the stop spring 23 is engaged with the tip of the penetrating pin 22. By engaging the U-shaped opening of the retaining spring 23 with the tip of the through pin 22 in this way, it is possible to prevent the through pin 22 from being detached from the through hole 21.

  Also, when releasing the rotation restraint of the stopper 5 by the through pin 22, the engagement of the U-shaped opening of the retaining spring 23 with the tip of the through pin 22 is released contrary to the above procedure. After that, the through pin 22 may be extracted from the through hole 21.

  Although this penetration pin 22 can also be used simultaneously with the locking member 13, it is not used when the locking member 13 is functioning normally from the viewpoint of work efficiency, and when a malfunction occurs in the locking member 13. It is preferably used as a means for stopping the rotation of the stopper 5. In this case, as long as the lock member 13 functions normally, the through pin 22 is removed from the through hole 21.

  In order to store the through pin 22 removed from the through hole 21 in this manner, the stopper 5 may be configured to be able to store the through pin 22. By configuring the stopper 5 so that the through pin 22 can be housed in this way, it is possible to prevent the through pin 22 from becoming an obstacle to work using the hook 20 when the lock member 13 functions normally. In addition, when a malfunction occurs in the lock member 13, the occurrence of the wisdom ring phenomenon can be suppressed by quickly taking out and using the through pin 22 for use. Therefore, the working efficiency by the hook 20 can be increased. Similarly, the stopper 5 may be configured so that the retaining spring 23 can be stored.

  The configuration that enables the penetration pin 22 to be housed in the stopper 5 is not particularly limited. For example, as shown in FIGS. 11 and 12, a gap is provided between the top surface 8 of the stopper 5 and the plate 14. The structure which accommodates by inserting the penetration pin 22 in a space | gap can be mentioned.

  When the penetrating pin 22 is housed in the stopper 5, the penetrating pin 22 is fixed between the pair of side surfaces 9 of the stopper 5 by the biasing force of the stopper spring 23, so that the penetrating pin 22 slides down from the stopper 5. 11 and 12, as shown in FIGS. 11 and 12, a fall prevention plate 24 is provided on the other end side (the side where the concave portion 12 is provided) of the stopper 5, and the tip of the penetrating pin 22 is dropped. The contact with the prevention plate 24 may prevent the through pin 22 from slipping off from the stopper 5.

<Advantages>
The hook 20 is further provided with a through pin 22 that can stop the rotation of the stopper 5 by penetrating the stopper 5, so that even if a malfunction occurs in the lock member 13, the stopper 5 prevents the stopper 5 from coming off. By restraining the rotation of the wisdom, it is possible to suppress the occurrence of the wisdom ring phenomenon.

[Other Embodiments]
The said embodiment does not limit the structure of this invention. Therefore, in the above-described embodiment, the components of each part of the above-described embodiment can be omitted, replaced, or added based on the description and common general knowledge of the present specification, and they are all interpreted as belonging to the scope of the present invention. Should.

  The hook is not limited to the one attached to the wire rope of the crane, and may be used as a lifting tool for other lifting devices such as one attached to the tip of the load of the chain block.

  The hook may be a so-called double hook that has two hook-shaped portions and a distal end portion in the opposite direction from the base end portion and is formed in a W shape when viewed from the side, and either one of the two hooks. Alternatively, the above-described stopper and lock member may be attached to both.

  In the present embodiment, the base pin fixed the base to the rib of the hook, and the anti-spinning rotation shaft has been described as being rotatably supported by the base of the anti-slip, but one shaft (axis) is It is also possible to adopt a configuration in which the base is fixed and the stopper is supported.

  In the present embodiment, the description has been given of the configuration in which the detachment stop has the lock member and the base has the arm, but the detachment stop may have the arm and the base may have the lock member.

  In the present embodiment, the configuration in which the locking member and the arm prevent the rotation of the locking mechanism has been described. However, at the same time as the other end of the locking mechanism approaches the tip of the hook, the locking mechanism can be prevented from rotating. Any lock mechanism that can be used is not limited to this.

  In the present embodiment, the case where the stopper is provided with the top surface and the pair of side surfaces has been described, but the structure of the stopper is not limited to this. For example, the stopper may have a back surface in addition to the top surface and the pair of side surfaces, or the stopper may be a solid bar.

  The present invention can be particularly suitably used as a crane suspension.

DESCRIPTION OF SYMBOLS 1 Hook 2 Base end part 3 Cage-like part 4 Tip part 5 Detachment 6 Base pin 7 Rib 8 Top surface 9 Side surface 10 Detachment rotation shaft 11 Base 12 Recess 13 Lock member 14 Plate 15 Arm 16 Rotation member 17 Release member 18 Holding Member 19 Protruding portion 20 Hook 21 Through hole 22 Through pin 23 Retaining spring 24 Fall prevention plate

Claims (7)

A proximal end;
The tip,
A hook that has a U-shaped curve from the base end to the tip,
One end is pivotally supported by the base end, the other end is close to the tip, and a stopper that opens and closes the opening of the bowl-shaped portion;
A locking member disposed between the stopper and the base end,
The hook which the said locking member stops rotation of the said locking stopper in the state in which the other end of the locking mechanism adjoins the said front-end | tip part.   The hook according to claim 1, wherein the lock member includes a member that releases the restraining of the rotation.   The detachment stop has at least a top surface and a pair of side surfaces, and the top surface and the pair of side surfaces at the other end of the detachment cover the tip portion in a state where the other end of the detachment stop is close to the tip portion. The hook according to claim 1 or claim 2.   The hook according to claim 1, 2 or 3, wherein the other end of the stopper is not protruded from the outside of the tip portion.   The hook according to any one of claims 1 to 4, wherein the other end of the stopper has a recess that engages with an inner surface of the tip.   The penetration pin further comprising a penetration pin for fixing the release stopper to the base end portion by penetrating the release stopper and preventing the rotation of the release stopper in a state where the other end of the release stopper is close to the distal end portion. The hook according to any one of claims 1 to 5.   The hook according to claim 6, wherein the stopper is configured to be able to store the penetrating pin.

Images