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KR-20260066241-A - Auto-locking crane hook

KR20260066241AKR 20260066241 AKR20260066241 AKR 20260066241AKR-20260066241-A

Abstract

The present invention relates to an automatic locking crane hook. The locking lever comprises a lever body having a lever hole formed to pass through the hook end of the hook body and a locking rod formed to be inserted into or separated from the locking groove of the hook body, and a pair of lever connecting parts that are inserted into the hook hinge axes of the hook body through elongated holes and supported to be rotatable and linearly movable. An elastic member for linear movement is deformed to generate a restoring force when the locking lever moves linearly outward along the length of the elongated holes. An elastic member for rotation is deformed to generate a restoring force when the locking lever rotates to a position that opens the entrance of the hook body. A support block is supported to be rotatable and vertically movable relative to the shaft of the hook body. An elastic member for the support block applies a downward elastic force to the support block.

Inventors

  • 임용태
  • 임승환
  • 임채연

Assignees

  • 임용태
  • 임승환
  • 임채연

Dates

Publication Date
20260512
Application Date
20241104

Claims (8)

  1. A hook body extending downward in a bent shape from the upper end of the hook to form a fitting space, having an entrance formed between the extended hook end and the upper end of the hook, having a locking groove formed on the outer side of the hook end, having hook hinge shafts formed protruding horizontally from the left and right sides of the upper end of the hook, and having a shaft extending upward from the upper end of the hook; A locking lever comprising: a lever body having a lever hole formed to pass through the hook end and a locking rod formed around the outer periphery of the lever hole that is fitted into or separated from the locking groove; and a pair of lever connecting parts extending from the lever body spaced apart from each other and fitted into the hook hinge axes through elongated holes to be supported so as to be rotatable and linearly movable; A linear movement elastic member mounted on the above hook body and locking lever, which deforms to generate a restoring force when the locking lever moves linearly outward along the longitudinal direction of the above slots; A rotatable elastic member mounted on the above-mentioned hook body and locking lever, which deforms to generate a restoring force when the locking lever rotates to a position that opens the entrance of the above-mentioned hook body; A support block that inserts the shaft into a hollow through a lower opening and supports it so as to be rotatable and vertically movable relative to the shaft; and An elastic member for a support block, mounted between the support block and the shaft to apply a downward elastic force to the support block, and maintaining the position of the locking lever by pressing the lever connecting portions against the bottom of the support block when the locking lever is maintained in a state of linear outward movement and rotates to reach an open position; Automatic locking crane hook including
  2. In paragraph 1, A latch groove formed on the inner side of the above hook end, and A lever hinge shaft installed on the lever body across the lever hole in the left-right direction, and A latch that is fitted onto the lever hinge shaft and is fitted into or separated from the latch groove as it rotates within the lever hole, and An automatic locking crane hook characterized by including an elastic member for a latch mounted between the latch and the lever body, which deforms to generate a restoring force when the latch is separated from the latch groove.
  3. In paragraph 1, The above-mentioned rotary elastic member is composed of a pair of torsion springs whose first ends are connected to each other, and An automatic locking crane hook characterized in that the torsion springs surround the hook hinge shafts, the first ends connected to each other are supported at the upper end of the hook, the second ends are inserted into and supported in spring guide grooves formed on the inner side of the lever connections, and move under the guidance of the spring guide grooves according to the linear movement of the lever connections.
  4. In paragraph 3, An automatic locking crane hook characterized in that the lever connecting parts are formed in a protruding shape having the spring guide grooves, and in the release position, the protruding parts contact and are restrained against the lower surface of the support block.
  5. In paragraph 1, Balls arranged along the outer surface of the shaft, and A ball seating groove for a support block formed along the hollow inner surface of the support block to partially seat the balls, and It includes a ball seating groove for the shaft formed along the outer surface of the shaft to partially seat the balls, and An automatic locking crane hook characterized in that either the ball seating groove for the support block or the ball seating groove for the shaft has a width that is vertically longer than the diameter of the ball, thereby guiding the lifting of the balls by the lifting of the hook body.
  6. In paragraph 1, The elastic member for the support block above is composed of a plurality of compression springs, and The above compression springs are received in spring mounting grooves formed on the inner circumference of the support block, and their lower ends are supported on the bottom of the spring mounting grooves; A support ring that supports the upper ends of the compression springs while wrapping around the shaft, and An automatic locking crane hook characterized by including a snap ring that is fitted into a ring mounting groove formed along the outer surface of the shaft and positioned on the upper side of the support ring to restrict the upward movement of the support ring.
  7. In paragraph 1, The elastic member for the support block above is made of a disc spring, and The above-described disc spring comprises a spring base into which the shaft is inserted in a hollow, and an elastic deformation part that is formed in a shape extending downwardly in a radial direction from the outer surface of the spring base and is received in a spring mounting groove formed on the inner surface of the support block, with its lower end supported at the bottom of the spring mounting groove; An automatic locking crane hook characterized by including a snap ring that is fitted into a ring mounting groove formed along the outer surface of the shaft and positioned on the upper side of the spring base to restrict the upward movement of the spring base.
  8. In paragraph 6 or 7, The above support block is, A block body having a hollow formed to insert the upper portion of the shaft through a lower opening, and an expansion groove formed in the lower portion extending radially from the hollow, and A plug having a hollow formed for inserting the lower portion of the shaft, an upper portion inserted into the expansion groove, a lower portion extended to surround the lower portion of the block body, and a spring mounting groove formed on the upper inner surface, and An automatic locking crane hook characterized by including a sealing member mounted between the lower portion of the block body and the lower portion of the plug.

Description

Auto-locking crane hook The present invention relates to a crane hook, and more specifically, to a crane hook connected to a chain of a hoist block equipped in a crane and used for transporting heavy objects. Generally, stationary cranes are installed and operated at various construction and industrial sites to transport equipment necessary for work to target locations, while mobile cranes are used in places where installing stationary cranes is difficult. These cranes are equipped with a hoist block. A crane hook used for transporting heavy loads is connected to the chain of the hoist block. A crane hook has a slot in the hook body to attach a wire rope or towing hook connected to a heavy load. A locking lever is installed in the hook body to open and close the entrance of the slot. The locking lever locks to the hook body while keeping the entrance of the slot closed to prevent the wire rope or towing hook from detaching from the slot during the transport of the heavy load. According to conventional crane hooks, a user manually inserts a wire rope or towing hook into the insertion space of the hook body and operates the locking lever. However, depending on the volume and height of the heavy load or the working environment, if the wire rope or towing hook above the load is located out of reach or inaccessible to the user, the user may be unable to operate the crane hook by hand. Countermeasures for this are required. FIG. 1 is a perspective view of an automatic locking crane hook according to one embodiment of the present invention. Figure 2 is a perspective view showing a portion of Figure 1. FIG. 3 is a perspective view showing the area in FIG. 1 where a latch is mounted on the locking lever. FIG. 4 is a perspective view showing the state in which the locking lever has moved to the open position. Figure 5 is a longitudinal section of Figure 4. FIG. 6 is a perspective view showing the state before the locking lever is released from the support block and reaches the closed position. FIG. 7 is a perspective view showing the state in which the locking lever is locked in the closed position. FIG. 8 is a perspective view showing an elastic member for a support block of another example mounted within the support block. The present invention will be described in detail below with reference to the attached drawings. Here, the same reference numerals are used for identical components, and repetitive descriptions and detailed descriptions of known functions and components that could unnecessarily obscure the essence of the invention are omitted. The embodiments of the present invention are provided to more fully explain the invention to those with average knowledge in the art. Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clearer explanation. FIG. 1 is a perspective view of an automatic locking crane hook according to an embodiment of the present invention. FIG. 2 is a perspective view showing a portion of FIG. 1. FIG. 3 is a perspective view showing an area in FIG. 1 where a latch is mounted on the locking lever. FIG. 4 is a perspective view showing the state in which the locking lever has moved to an open position. FIG. 5 is a longitudinal cross-sectional view of FIG. 4. FIG. 6 is a perspective view showing the state before the locking lever is released from the support block and reaches the closed position. FIG. 7 is a perspective view showing the state in which the locking lever is locked in the closed position. Referring to FIGS. 1 to 7, an automatic locking crane hook (100) according to one embodiment of the present invention comprises a hook body (110), a locking lever (120), an elastic member for linear movement (130), an elastic member for rotation (140), a support block (150), and an elastic member for the support block (160). The hook body (110) extends downward in a bent shape from the upper part of the hook (111) to form a fitting space. An opening is formed between the extended hook end (112) and the upper part of the hook (111) of the hook body (110). The hook body (110) may be formed in a roughly C-shape. The hook body (110) can be hung by inserting a wire rope or a towing hook connected to a heavy object into the fitting space through the opening. A locking groove (113) is formed on the outer side of the hook end (112) of the hook body (110). The locking groove (113) is formed to allow the locking rod (123) of the locking lever (120) to be inserted. The locking groove (113) may be formed with the left and right sides open. Hook body (110) has hook hinge shafts (114) formed that protrude horizontally from the left and right sides of the hook upper portion (111). The hook hinge shafts (114) are formed so as to be inserted into the elongated holes (127) of the lever connecting portions (126). A shaft (115) extends upward from the hook upper portion (111) of the hook body (110). The locking lever (120) comprises a lever body (121) and a pair of lever connectin