KR19980034986A - Hoist device - Google Patents

Abstract

The present invention relates to a hoist device configured to rigidly engage a screw hole on an outer surface of a dripping member as a die. The hoist device includes a short engagement stud having a screw shank suspended from an annular shoulder of the body portion of the stud, and a base member having a body portion for supporting the short engagement stud and freely rotating engagement with the stud when the stud is fixed to the dripping member. And a hoist ring pivotally connected to the base member.

Description

Hoist device

FIELD OF THE INVENTION The present invention relates to the field of lifting or lifting relatively heavy loads, and more particularly to hoist devices that connect to heavy loads that can be lifted by cranes or assembly machines.

Andrew's patents 3,297,293, 4,431,352, 4,592,686, royal patents 4,570,978, and Sui's 4,641,986 are incorporated herein by reference. All these patents relate to a hoist device comprising a U-clevis that is pivoted 180 ° and secured to the dripping member for supporting the structure by the pivoting device, in which the stud is attached to the dripping member or support structure in a particular manner. And clamps the bushing between the stud and the member. The U-shaped ring is rotated around the bushing in the support ring, ie drip bearing ring. These conventional machines with fixed eye bolts, pivotally connected eye bolts are well known in the art and are incorporated herein by reference so that these structures do not have to be repeated. Eye bolts, which are either high precision or pivoted, are not very expensive, but do not provide a pivotal connection state and the variety of conventional techniques cited herein by reference.

The present invention relates to a hoist device that can be used to lift heavy loads or objects, such as dies, vehicles, internal combustion engines, etc. As will be described in detail with respect to the device, the present invention has a much broader use, including containers, airplanes It can be used for a variety of applications where it is necessary to secure the ring to a structure that lifts or secures a structure, such as an instrument, a boat, or the like.

The most inexpensive hoist device of the kind aimed at in the present invention is a standard eye bolt, which is a ring casting with an accessory shank threaded to be received in a threaded bore formed on a member to be lifted or pulled up. . At that time, a mechanical hoist having a hook wire is used to lift the device by applying a hook through the eye bolt and operating the hoist device. Eye bolts are not expensive and are used in most mass production applications such as automobiles, welders, generators, combustion engines, and the like. Such utility products are equipped with eye bolts, as a result of which the utility products can be pulled up and moved to a desired position. The difficulty is that this eye bolt cannot compensate for lifting forces that do not actually match the shank axis on the eye bolt. Thus, it is made relatively heavy to compensate for the lack of versatility of the eye bolt.

Many hoist devices have been developed for many years to allow the ring connected to the hook of the hoist to pivot and rotate for the purpose of automatically adjusting the placement of the ring against the force exerted by the hoist during the lifting process. Such devices are disclosed in the patents cited by reference and all are quite expensive. In addition, these devices have disadvantages. Such conventional devices cannot be easily disassembled and tested in the field. Also, when assembled differently these devices react and work differently. Thus, such devices cannot be easily tested after use or reassembly, nor can they continue to operate. The cause of this drawback is due to the complexity of the structure required to achieve the rotational operation. These devices also use U-shaped rings that are weaker than the continuous ring of eye bolts.

U-shaped rings have been used in structures required to achieve swing operation in conventional devices. Swivel actuation is achieved by a stud that clamps the ring against the bushing. The bushing forms a track or tool such that the support ring pivots around the bolt. When using such a structure, the only way in which the ring can be mounted to a traversable support ring is to use a U-shaped ring structure. Such structures are too expensive and cannot be decomposed or tested in the field. The weight and cross section of the U ring shall be such that the U ring cannot be pulled away from the swing ring mechanism. This conventional hoist ring is expensive, complex, disassembled or reassembled and tested because it has to allow the ring to rotate and to move or pivot around the U-ring. There were related problems.

The present invention relates to improvements in the field of hoist devices as described above. According to this refinement, the hoist device of the present invention has the advantage of an eye bolt or pivot ring, and the hoist device pivots in full circle about the axis of the stud on which the hoist device mounts the hoist device onto the dripping member. It has the advantage of making it possible. Thus, the present invention overcomes the difficulties of stationary rings or other pivot rings without incurring the resulting costs associated with other efforts to provide both pivot and pivot hoist rings.

According to the present invention, there is provided a hoist device that is firmly coupled to the threaded bore on the outer surface of the dripping member as a die. The hoist device of the present invention includes a load engaging stud having a force supporting head, a cylindrical body portion having a lower annular bearing shoulder, and a thread shank portion suspended from the annular shoulder of the body portion. In some examples, the body portion is formed from a stock that is polygonal in cross section. The term cylindrical is intended as a general description of the preferred embodiment. In this way, the studs with the upper head are screwed onto the dripping member. The stud of the present invention has a body portion with a central passage through the base member and the shank portion of the stud is threaded through the central passage into the dripping member bore until the lower bearing shoulder of the stud is pulled against the outer surface of the dripping member. This is used together with the base member which enables pivotal engagement of the base member and the stud when the support stud is fixed to the dripping member. According to this engagement, the base member is captured between the head of the stud and the dripping member. The stud has a stop which controls the movement of the stud member into the screw bore of the dripping member. A stop or shoulder on the stud is used to place the shank portion of the stud under tension by rotating the stud in a threaded motion. The central passage of the base member is sufficient to capture the upper annular shoulder and load support head of the stud for transferring force from the base member to the support head of the stud when the base member is pulled out of the dripping host during lifting or hoist operation. It has a recess.

As mentioned above, the present invention does not use a bushing that is compressed such that the stud is placed under tension. Such concepts are commonly applied in prior art swing hoist rings. In the prior art, the clamp bushing is not rotatable, but the base member is freely rotated relative to the stud. The U-ring engages the bushing in a rotatable manner with respect to the bushing. This is a completely different structure from the present invention in that the base member is rotated about its central passageway captured between the head of the support stud and the lifting member. According to the invention, the hoist ring has a lower generally cylindrical connection portion and an upper bite portion connected to the body portion of the base member which is rotatable with respect to the stud. A support member having substantially the same contour as the lower base member is firmly fixed to the base member so as to rotate on the stud. By providing a slot in one of these members between the body portion of the upper support member and the body portion of the lower base member, the cylindrical connection of the hoist ring can be captured in a pivot assembly having the support member and the base member. This assembly is relatively simple and allows both pivoting of the entire assembly and pivoting of the hoist ring. Combining the pivoting motion with the pivoting motion eliminates the need for a U-shaped ring configuration required in the prior art.

According to another feature of the invention, the two body parts of the support member and the base member are generally cylindrical. The slot used in the present invention will be in one of the members. The slot is preferably in the support member; However, it may be in the base member. Regardless of the position of the slot, the continuous ring has a lower cylindrical connection extending between the two rotating members, the base member and the support member, so that both the eye bolt and the complex and expensive multi-directional hoist arrangements available so far Benefits can be obtained.

According to another feature of the invention, the hoist ring is forged steel; However, it may be cast iron, or it may be formed by bending a long bar into a continuous shape and welding the end portions thereof. In practice, the steel is 4140 steel; However, various kinds of steels such as low carbon steels can be employed to practice the present invention.

According to another feature of the invention, various couplings may be provided for firmly fixing or connecting the base member and the ring support member which rotate together. In practice, it is preferred that the fastener is a plurality of bolts extending from one member to another; However, the two members may be welded together, or a pin may be installed through the side of one member for a permanently coupled hoist device that does not need to be disassembled.

According to another feature of the invention, the length of the load bearing head of the stud and the inner recess for preventing the head from being detached are determined so that the head can be moved in the recess even after the support member is in place. . In this way, the two joined members are free to rotate relative to the head of the stud. In a similar manner, the lower shoulder of the middle part of the stud which rotates against the outer surface of the dripping member extends outward from the lower side of the base member of the hoist device. Since this extended length is greater than the difference in height between the recess and the head of the base member, under no circumstances will the pivoting base member engage with the outer surface of the dripping member being raised or lifted. Of course, this is a preferred form of engagement of the device, and the device will still rotate even if there is a certain amount of frictional action. Such operation is undesirable and mechanically prevented according to one feature of the invention.

It is a primary object of the present invention to provide a hoist device that combines the advantages of an eye bolt with the advantages of both swing and pivot operation.

It is an object of the present invention to provide a hoist device as described above, which is relatively inexpensive, employs a continuous ring instead of a U-shaped ring, and can be disassembled and tested after use.

Another object of the present invention is to provide a hoist device as described above, which can be tested by nondestructive inspection. These and other objects and advantages will be apparent from the following description. These and other objects and advantages will become apparent to those skilled in the art upon reading the following description, taken in conjunction with the accompanying drawings.

1 is an exploded view of a preferred embodiment of the present invention.

2 is a partial cross-sectional side view of a preferred embodiment of the present invention.

Figure 3 is a plan view slightly cut off the preferred embodiment of the present invention.

4 is a side view of a hoist ring used in accordance with the present invention.

5 is a schematic representation of the operating characteristics made possible by carrying out a preferred embodiment of the present invention.

Fig. 6 is a cross sectional view with dimensions of the base member and the load bearing studs used in the present invention.

7 is a view similar to FIG. 2 showing a variant of the invention;

8 is a cross-sectional view of a variant of the invention illustrated in FIG.

9 is a plan view of the present invention shown in FIG.

10 is a side elevation view of a load bearing stud used in the preferred embodiment of the present invention.

FIG. 11 is a side view of the torque control tool used with the stud shown in FIG. 10. FIG.

FIG. 12 is an operational view, in cross section, of an embodiment of the present invention using the tool shown in FIG. 11 to control the torque applied to the load bearing stud shown in FIG. 10; FIG.

Figure 13 is a side elevation view of another embodiment of the present invention.

14 is a sectional view taken along line 14-14 of FIG.

15 is a cross-sectional view of another embodiment of the present invention.

Figure 16 is a partially cut away side view of a further device for connecting the support member and the base member of the illustrated embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10: hoist device

12: no dropping

20: stud

22: head

24: main body

26: shank

38,44: recess

40: base part

42: central passage

34,46: shoulder

50: bolt hole

52: bolts

60: ring

72: slot

74,80 bore

100: tool

It will now be described with reference to the drawings showing preferred embodiments of the invention, which is not intended to limit the invention. 1-4 illustrate a hoist device 10 for connection to the dripping member 12 illustrated in FIG. 2. The dripping member 12 has a threaded bore 14 and an upper surface 16 made of a substantially flat shape for illustration purposes. The hoist support stud 20 includes a cylindrical upper head 22 and a cylindrical body 24 extending below the upper head 22 and terminating at the threaded lower shank 26. The diameters of the head, the cylindrical body portion, and the threaded shank gradually decrease as illustrated in FIG. The stud 20 is a load bearing member that must absorb both shear and tensile stress during operation of the hoist device 10. The upper surface 30 of the stud is formed with a lower support surface 32 which rotates towards the surface 16 when the stud 20 is in the load bearing position. The lower surface of the head 22 defines a downward facing load bearing shoulder 34 which represents the entirety of the bottom surface or the annulus of the cylindrical surface 26 of the head 22. As shown, a recess 38 is formed between the shank 26 of the stud 20 and the body portion 24 so that the shank 26 can be appropriately threaded. The head 22 and body portion 24 are separated by recesses 39 similar to the above.

In order to provide the swing mechanism according to the preferred embodiment of the present invention, the cylindrical base portion 40 is rotatably mounted to the stud 20 already penetrated through the central passage 42 in the member 40. The central passage is formed with an upper recess 44 for receiving the head 22 and an upper shoulder 46 which meshes with the shoulder 34 of the head 22.

Since the combination has a load transfer structure, the shoulders 46 engage the lower shoulders 34 of the head 22 when the member 40 is pushed upwards so that the studs may ride on the member 40. Provides strong The size of the central passage shown in FIG. 6 is associated with the size of the stud 20 such that the member 40 pivots around the assembled stud 20.

The base member includes a plurality of reverse sink bolt holes 50 for the bolts. While the illustrated embodiment employs a number of fastening bolts, two or four bolts may be used to assemble the hoist device 10 as shown in another embodiment of the present invention.

The hoist continuous ring 60 is provided through a suitable process to have the upper ring portion 62 and the linear cylindrical connection portion 64. In a preferred embodiment, hoist ring 60 consists of a continuous forged steel component. It may consist of a cast iron component or it may consist of forming a single piece of steel into a suitable shape and welding them together. According to the present invention, the hoist ring is composed of a continuous ring unlike the U-shaped ring shown in the prior art, so that even if the lifting hook enters the wrong angle during the lifting operation while maintaining its strength and tissue, the transfer separation is performed. Do not happen.

According to the present invention, the cylindrical port member 70, which substantially matches the shape of the base member 40, has a slot 72 for receiving the cylindrical portion 64 of the ring 60 between the base member and the support member 70. ) Is provided. A plurality of threaded bores 74 cavities with the bolt holes 50 such that the cylindrical portions of the members are clamped to each other by bolts 52 in such a way that a hoist ring 70 is received between the members 40, 70. Works. These members are rotated equally about the stud 20, while the hoist ring 60 can be swung about 180 °.

The hoist mechanism 10 has the advantage that the hoisting device of the continuous ring type as well as the above-described turning operation that only the hoisting device of the U-shaped ring type can have. The present invention does not apply a bushing between the stud 20 and the surface 16. Of course, such bushings may be employed in certain configurations that still benefit from the advantages of the present invention, but the fixed cylindrical surface of the studs will be replaced by the fixed surface of the clamped bushing.

In practice, a socket is provided at the top 30 of the head 22 for use of an Allen wrench, a mechanism for assembling and connecting the stud 20 into the threaded bore 14 of the dripping member 12.

According to another aspect of the invention, the socket may be replaced by a radially extending passage, illustrated as a bore 80 through the head 22. In order to assemble and connect the stud 20 into the bore 14, the members 40 and 42 which receive the stud 20, the recess 44 and the cylindrical connection 64 in the slot 72 are bolted. And assembled by 52. The assembly thus formed may be transported for the hoist mechanism 10 to be used elsewhere. In the configuration, a long rod or tool is pushed through the hole 82 of the base member 40. The stud 20 is pivoted in the recess 44 until the passage, ie the bore 80, is aligned with the hole 82. Then, the appropriate length of tool extends through the head 22 of the stud 20 so that the stud can be rotated to the proper position as illustrated in FIG. 2. 4 illustrates the overall operational features of the preferred embodiment of the present invention.

An essential aspect of the invention is that the stud 20 and the connecting portion 64 of the lifting ring 60 are received by the members 40 and 70 and then the ring is rotated by the members 40 and 70. The configuration for allowing 60 to rotate is illustrated as well including the configuration for allowing the ring 60 to pivot.

Referring to FIG. 6, aspects of the present invention configured to have a predetermined dimension are illustrated. These dimensions are clearly shown through the description of the present invention; The dimension a shown in FIG. 6 indicates the length of the portion 24 of the stud 20 extending from the base member 40 when the head 22 is at the lowest position of the recess 44. In that state, the dimension b represents the gap between the top of the member 40 and the top of the head 22. In practice, dimension a represents a value significantly greater than dimension b. In this form, the two members 40 and 70 which are fixed to each other are selected to take the lowest degree, while the lower surface of the member 40 is a surface while the dripping member 12 is connected to the stud 20. Will not mesh with (16). The dimension c represents the height of the recess 44. This dimension is greater than the height d of the head 22. Seen from this relative relationship to the height of the recess and the height of the head. After the flat lower surface of the support member 70 is clamped toward the flat upper surface of the base member 40, the head is not coupled to the recess 44. In the last aspect of the dimension, the body portion 24 forms an effective length e which extends from the lower portion of the head 22 to the supporting lower shoulder 32 of the stud 20. Dimension e represents the length of the outer extension of part (24) as shown by dimension a. These dimensions are provided to illustrate a preferred embodiment of the present invention, whereby the present invention can be manufactured to maintain free rotational motion.

Referring now to FIGS. 7-9, a variation of the preferred embodiment is illustrated, where the bolt 52 extends from the upper support member 70 ′ to the lower base body 40 ′. In other respects, the embodiment shown in Figures 7-9 is the same as the preferred embodiment illustrated in Figures 1-4.

Hoist device 10 'works in the same way. In this variant, the bolt is exposed by the use of the hoist unit 10 '. As mentioned above, the socket may be used to screw the stud 20 into the threaded hole of the dripping member 12. This structure is illustrated as socket 90 in FIG. If such a device is used, then the embodiment of FIGS. 7-9 is simplified in the field. The member 40 'is assembled on the stud 20, which is torqued to its proper position. Thereafter, the ring 60 is assembled into the slot 74 'and then the cylindrical body portion of the support member 70' is assembled on the assembly member 40 'by bolts 52 as best shown in FIG. do.

According to another aspect of the invention, the hoist device 10 ′ is assembled by extending the elongated tool 100 through the passage of the hole 82 and the bore 80 of the head 22. Such a device is illustrated in FIGS. 10-12. The long tool may actually be a screwdriver or other similar device. By aligning the bore 80 with the hole 82 in the base member, the long tool penetrates the head of the stud 20 so that the stud is adapted between the lower shoulder 44 and the top surface of the rod. Torque can be applied to its proper position by force.

According to one aspect of the invention, the tool 100 has an operating end 102 and a handle or handle end 104. Adjacent end 102 is a concave region 110 having a cross section determined by the torque to be applied to stud 20 during assembly. The tool 100 is hardened to destroy the region 110 when suitable torque is applied to the stud 20. This concept is illustrated in FIG. 12. By using this concept, the device for securing the two cylindrical members 40, 70 together enables to apply the preferred embodiment illustrated in FIGS. 1-4. The bolt may extend from the bottom member 40 to the top member 70. In summary, when using the passage 80, a long tool is used to assemble the stud 20.

According to one aspect of the present invention, the torque response tool 100 shown in FIG. 11 has certain advantages because the tool applies a consistent torque to the stud 20. If it is desired to prevent separation of the studs 20, an epoxy resin is deposited in the bore 80 of the head 22 to prevent another use of the long tool. This precaution is not a preferred aspect of the present invention.

According to another aspect of the invention, the bolts 52 can be replaced by using threaded surfaces on the upper ring support member and the base member. In this aspect of the invention, the base member may have a female threaded portion, while the upper support member may have a male threaded portion. A hoist device using this concept is illustrated in FIGS. 13 and 14. The base member 120 includes a cylindrical recess 122 with a relatively large diameter female threaded portion 124 and a flat top surface 126. The upper support member 130 has a downwardly extending cylindrical member with an externally extending male screw portion 132. These threads interact with threaded portion 124 to assemble members 120 and 130. The bottom surface 134 of the member 130 clamps against the surface 126 by rotating the hoist ring 60 in the slot 136. The slot 124 is quite deep in the vertical direction so that the hoist ring 60 can move when the hoist ring 60 is prevented from escaping between the members and on the inside of the flat surfaces 136, 134. .

In FIG. 15, the base member 150 has an upper protrusion 152 having an externally threaded portion 154 on an upper surface 156 of the member 150. In this embodiment, the lower base member 150 includes a slot 158 necessary to prevent the ring 60 from detaching. The upper support member 160 includes a cylindrical recess 152 with an inwardly extending female thread 164 that terminates at the lower flat surface 166. This flat surface interacts with the surface 152 over that portion of the slot 158 that prevents detachment of the portion 64 of the ring 60. Such a device can utilize the threads of the support member and the base member, but this thread is reversed from the structure shown in FIGS. 13 and 14. As can be appreciated, this reversal causes the slot for the ring 60 to be positioned on the other member.

Another variant of the preferred embodiment is illustrated in FIG. 16, where the base member and the support member are permanently welded together. In this embodiment, the base member 170 is a weld seam 172 extending in the circumferential direction of the support member 180 with a slot 182 for preventing the separation of the ring 60 between the two assembled members. It is fixed by). Using this aspect of the invention, the hoist device is permanently assembled and requires the use of the bore 80 in the hole 82 and the stud 20 as described above.

In another variant of the preferred embodiment, the base member and the support member, not shown, are permanently fixed together by a pin. Such a modification can best be envisioned with reference to FIGS. 13 and 15. In this variant, the pin bores are drilled into the sides of the members 13 and 130 of the guide 13 or 150 and 160 of FIG. 15 so that the pins can be inserted through the pin bores to secure the two members together. Can be. In this embodiment, screwing in the members may be lost. Two or more pins are used to hold the member together and are preferably positioned generally symmetrically with respect to the side of the member.

The present invention has been described with respect to preferred embodiments and alternatives. Many modifications and variations of the disclosed embodiments will come to mind to one skilled in the art upon reading and understanding the detailed description of the invention. All such variations and modifications may be considered to include them as long as they fall within the scope of the present invention.

Accordingly, the invention has been limited and claimed in the following claims.

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Claims (25)

A hoist device that is firmly coupled to a threaded hole on an outer surface of a dripping member, A load engaging stud having a force bearing head, a cylindrical body having a lower annular bearing shoulder and a threaded shank extending from the annular shoulder of the body; A base member having a body having a central through passage, the stud being screwed into the hole of the dripping member through the central passage until the support shoulder is drawn out with respect to the outer surface of the dripping member. When the fixed member is fixed to the dripping member, the base member can be freely pivoted to the stud, the main body of the base member having an upper recess for capturing the drip support head; Such a base member having an upper annular shoulder for transferring force from said base member to said support head when said base member is pulled out of said dripping member; A hoist ring member having an upper bight portion and a lower generally cylindrical connection portion; A hoist ring support member having a main body; Means for firmly mounting the support member to the base member while allowing the base member to pivot around the stud; Formed between the main body portion of the support member and the base member in one of the members so as to capture the connecting portion of the hoist ring between the base member and the support member, within which the hoist ring pivots. Slot to enable Hoist device comprising a. The hoist device of claim 1, wherein the body portions are generally cylindrical. The hoist device according to claim 1, wherein the slot is in the support member. The hoist device according to claim 1, wherein said slot is in said base member. The hoist device according to claim 1, wherein the hoist ring is forged steel. The hoist device according to claim 1, wherein the hoist ring is cast iron. The hoist device according to claim 1, wherein the hoist ring is formed from an elongated bar which is shaped and welded to the ring. The hoist device according to claim 1, wherein the fixing means is a separate bolt. 9. The hoist device according to claim 8, wherein the bolt extends from the base member and is screwed to the support member. 9. The hoist device according to claim 8, wherein the bolt extends from the support member and is screwed to the base member. 2. The fastening means of claim 1 wherein said securing means comprises a female threaded portion on one of said members and a mating male threaded portion on another of said members, whereby said members rotate by one relative to the other. Hoist device, characterized in that fixed. The hoist device according to claim 1, wherein the fixing means comprises a welded joint extending in the circumferential direction between the base member and the support member. The height of the load bearing head of claim 1, wherein the upper recess is greater than the height of the load bearing head by a first given range such that the head freely rotates in the recess when the support member is secured to the base member. Hoist device, characterized in that it has a higher height. The hoist device according to claim 1, wherein the lower support extends below the base member by a second given range when the annular shoulder is engaged with the force supporting head. 14. The hoist device according to claim 13, wherein the lower support extends below the base member by a second given range when the upper annular shoulder is engaged with the force supporting head. 16. The hoist apparatus according to claim 15, wherein said second given range is greater than said first given range. The hoist device according to claim 1, wherein the stud has a tool drive in the force supporting head. 18. The hoist device according to claim 17, wherein the tool drive has a socket recess on top of the head. 18. The tool drive of claim 17 wherein the tool drive extends radially over the shank through the stud and access opening coincident with the tool path when the base and the stud are at a given relative angular position. Wherein the long tool extends into the tool passage through the opening to rotate the stud and the base member in unison until the lower shoulder engages with the surface of the dripping member. Device. 20. An elongated tool for use in a hoist device as claimed in claim 19, comprising a necked down portion between a first end extending into the tool passageway and a second end for manual rotation, wherein the concave portion is A tool associated with a range of torque to be applied to the stud when the stud is assembled to the dripping member. A hoist device for firmly attaching to a screw hole on an outer surface of a dripping member, A load engaging stud to be screwed into the hole and base member, the load engaging stud having a pivot engaging portion pivotably coupled to the stud and adapted to rotate over a complete circle around the stud; The stud has a head having an outer cylindrical surface of a first diameter and a predetermined height and a lower annular surface, a second diameter extending from the annular surface and smaller than the first annular surface and smaller than the first diameter. An intermediate cylindrical shank having a predetermined height and a threaded shank having a third diameter extending from the intermediate cylindrical shank and smaller than the second diameter; The base member has an intermediate through opening for receiving the stud, the central opening having an upper recess for rotating the head and a lower recess for rotating the intermediate shank, The length is longer than the height of the head, and the length of the lower recess is shorter than the height of the intermediate shank, whereby the shank is on the dripping member with the lower surface of the intermediate shank facing the dripping member. Screwing into a hole in the base member causes the base member to rotate about the shank; The hoist device also, A hoist ring having a generally cylindrical lower connection; A hoist ring support member having a body portion; Means for firmly mounting the support member to the base member while allowing the base member to pivot around the stud; Slot means located in one of the members to capture the connection of the hoist ring between the base member and the support member and to allow the hoist ring to pivot in the slot Hoist device comprising a. 22. The hoist device according to claim 21, wherein said body portion is generally cylindrical. 22. The hoist device according to claim 21, wherein said stud has a tool drive on said force support head. 24. The tool drive of claim 23 wherein the tool drive includes a tool passage extending radially over the shank through the stud and an access opening coinciding with the tool passage when the base member and the stud are at a given relative angular position. And a long tool extends into the tool passage through the opening to rotate the stud and the base member in unison until the lower shoulder engages the surface of the dripping member. . A long tool for use in a hoist device as claimed in claim 24, comprising a necked down portion between a first end extending into the tool passageway and a second end for manual rotation, the narrowed portion being A tool associated with a predetermined range and torque to be applied to the stud when the stud is assembled to the dripping member.