JPS6112128B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a swivel hook having components that are rotatable relative to each other, and in particular to a swivel hook in which the axial connections between the components allow complete free rotation relative to each other. It is related to.

According to the invention, such a swivel hook includes first and second components assembled such that they are axially connected. The attachment means for this hook has a frustoconical hole extending therethrough, and the second member forming the hook portion of the swivel hook has a frustoconical hole adapted to fit into the frustoconical hole of the first member. It has a trapezoidal protrusion. The extension on the protrusion of the second member has a maximum diameter at the minimum diameter end of the frustoconical portion that is smaller than the minimum diameter end of the frustoconical bore. This arrangement is such that the protrusion is movable relative to the frustoconical hole, so that the extension extends parallel to the axial line at the end of the frustoconical hole, thereby Appropriate gaps are provided on the bearing surface to allow free movement between each member. In other words, since the extension part exists in the protrusion of the second member, after forming the protrusion of the second member by die-casting using the frustoconical hole of the first member as part of the mold as described later, By moving the protrusion in the direction of the larger diameter of the truncated conical hole, a mutually rotatable joint can be created in the truncated conical part.

Furthermore, according to the invention, in order to make said member capable of relative rotation in the first and second axes, the first member is first formed with a truncated conical bearing surface, and then the first member is formed with a frustoconical bearing surface; The second member is cast using the bearing surface of the first member as a mold while the bearing surface of the second member is formed. The second member whose bearing surface forms a protrusion includes an extension having a maximum diameter that is smaller than the minimum diameter end of the frustoconical bearing surface. By thus having the maximum diameter of the extension portion smaller than the minimum diameter of the frustoconical projection and thus having an inward step at the boundary between the frustoconical projection and the extension portion,
This has the advantage of being easier to manufacture and resulting in cheaper products. That is, in manufacturing, the extension part is formed by a mold that combines two semi-cylindrical molds, but when combining the semi-cylindrical molds, some misalignment is inevitable.
As a result, the cylinder made from that mold will be slightly shifted in the center, making it look like it is not aligned. This deviation is equivalent to an increase in the maximum diameter of the extension. Therefore, if the extension part does not have a small diameter as described above, if you try to insert the extension part into the truncated conical hole, it will get stuck on the edge of the small diameter end of the truncated conical hole and will not be able to enter, or even if it does, there will be a lot of friction. Free rotation of the hook becomes difficult. Since the extension part of the present invention has a small diameter as described above, the above deviation can be absorbed by the step formed by the difference between the diameter of the extension part and the diameter of the small diameter end of the truncated conical projection. I can do it. Therefore, it is possible to manufacture a product with no problem even if the precision of the mold is slightly compromised, so that manufacturing costs can be reduced. The extension also has an axial length that is substantially shorter than the axial length of the frustoconical bearing surface. These members move axially relative to each other, whereby this extension moves in the direction of the larger end of the frustoconical hole in the first member, so that there is no axial connection between the two members. Become free.

In order to provide a clearer understanding of the invention, the invention will now be described in more detail with reference to the accompanying drawings.

Referring to FIG. 1, a swivel hook according to one embodiment of the invention is constructed from two unitary members. That is, each single member is a yoke member 20 and a hook member 21 pivotally attached to the yoke. The material of this hook member is, for example, die-cast metal or molded plastic material. By forming the swivel of such material, the swivel can be designed decoratively and its appearance can be emphasized. To use the swivel hook of FIG. 1, a yoke member 20 is provided which is connected to a suitable mounting member so that the hook member 21 can be pivoted to any angular position for suspending an object. If desired, yoke member 20
a hole (not shown) passing vertically through the top of this yoke member for attaching a hook by other means;
is provided. For example, if it is desired to hook a cord, thread the cord through such a hole and tie a knot at the lowest position that locks the yoke member in the desired position.

It is necessary that the hook member 21 can freely rotate relative to the yoke member 20. If the bearing surfaces of both parts are undesirably loose, complex, and time consuming in the process of forming the hook part, conventional die-casting or plastic molding techniques can be used to create free shaft rotation. I can't.

As will be apparent from the following text, the invention is particularly directed to the construction of a hook member, in addition to having a joint that allows free rotation of other objects. Also therein, a second member is cast and molded using the bearing surface of the first member, which is used as a mold for the bearing surface of the second member. Such techniques are shown, for example, in US Pat. No. 2,818,494 (Morin).

Figures 2-4 more clearly describe the rotary hook of Figure 1 in accordance with the present invention. Figure 2 shows yoke 2
0 is a plan view of the assembled hook after die-casting or molding the hook member 21 and the hook member 21;
3 and 4 are enlarged plan views of the yoke member 20 and the hook member 21, respectively. In Figures 1 and 2, the yoke member consists of a U-shaped member 23 forming the upper part of the swivel hook, the ends of which are joined by a bridge 24 across the U-shaped member. This bridge 24 has a generally flat upper surface 25 and a lower surface 2, at least in the vicinity of the frustoconical bore 27.
6, the frustoconical hole 27 passes through the bridge 24 between the upper surface 25 and the lower surface 26. Also,
This truncated conical hole 27 forms a truncated conical bearing surface,
The U-shaped member 23 has a small diameter end directed toward the U-shaped member 23. For example, the taper angle of the frustoconical hole 27 is about 5 degrees, but this is not a limiting feature of the invention.

As illustrated in FIGS. 2 and 4, the hook member 21 has an upwardly extending frustoconical projection 30 having the same taper as the frustoconical hole 27 of the yoke member and having substantially the same axial length. is provided. The cylindrical portion 31 is a coaxial extension from the small diameter end of the upper end of the protrusion 30 and has a diameter smaller than the diameter of the small diameter end of the protrusion 30 . As an example, the cylindrical part 31 is 0.571
cm (0.225 inch), and the small diameter end of protrusion 30 has a diameter of 0.596 cm (0.235 inch). Furthermore, the axial length of the cylindrical portion 31 is substantially shorter than the axial length of the truncated conical portion 31. For example, in one embodiment of the invention, the cylindrical portion 31 has an axial length of 1.09 cm (0.43 inches) and the frustoconical portion 30 has an axial length of 0.533 cm (0.21 inches).
, which is equal to the axial length of the truncated conical hole 27 of the yoke member. The enlarged part 32 is provided at the upper end of the cylindrical part 31, and the enlarged part 32 has an outer diameter larger than the diameter of the small diameter end of the truncated conical part 30. Furthermore, a lower surface 33 of the enlarged portion 32 facing the hook member 21
is preferably flat to engage the upper surface 25 of the bridge 24 of the yoke member. Furthermore, the portion 34 of the hook member 21 proximate the protrusion 30 has a diameter at least as large as the large diameter end of the frustoconical hole 27. On the other hand, in the above example, part 3
1 is described as being cylindrical, but this part does not need to have a cylindrical cross section, but only needs to have a large enough cross section to withstand the load placed on this hook, and its maximum diameter is a truncated cone. Hole 2
It is clear that it is sufficient that the diameter is smaller than the small diameter end of No.7.

FIG. 5 illustrates a simplified casting technique for forming the sling hooks of FIGS. 1-4. This drawing shows one mold member 35 of a set of movable molds, which mold member 35 has a first cavity 36 formed to form a yoke member.
and a second yoke member in the form of a yoke member adjacent the cavity 38 forming the hook member in the relative position shown in FIG.
It has 37 blank spaces. To provide means for forming the frustoconical hole 27 in the mold, a tapered pin 39 extends through a portion of the cavity corresponding to the frustoconical hole in the yoke member. The mold member also includes a cavity 40 forming a gate.

During the first casting, the frustoconical hole 27 is inserted into the bridge 2.
The yoke member 4 is also die-cast at the front and fitted into the cavity 37. Then Zamak
A suitable die cast member, such as No. 3 zinc alloy, is poured into the mold through aperture 41 in a conventional manner such that it flows through cavity 40 around core rod 42 to cavities 36 and 38. Ru. Therefore,
The next yoke member is formed in the cavity 36 and the hook member is formed in the cavity 38 by passing through the frustoconical hole 27 of the first yoke member (not shown) previously set in the cavity 37. be done. The pin 39 is then withdrawn axially and the mold is opened.
The core rod 42 replaces the yoke downward in its axial direction, and the yoke formed in the cavity 36 is replaced with the cavity 3.
Set to 7.

This mold is provided with a removable insert, for example to make a U-shaped member of a yoke member with a central hole for mounting a swivel hook. In this case, the pin 39 is provided in an axial extension extending through the U-section, so that this central hole is also made in the yoke in a die-casting process.

Since the cavity 36 with this pin 39 is formed to create a yoke member as described in connection with FIG. 2, a frustoconical hole is created through the bridge of the yoke member. Cavity 36 is formed to create a yoke member inserted into cavity 37, the frustoconical hole of which serves as a mold for the frustoconical projection of the hook member. The mold member 38 has a cylindrical cavity 44 corresponding to the cylindrical portion of the protrusion of the hook member, and an enlarged cavity 45 for forming the enlarged end of this cylindrical portion integrally with the cylindrical portion. In the device shown in FIG. 5, it can be seen that the cylindrical portion is moved from the truncated conical surface of the yoke member toward the U-shaped member of the yoke member, as shown in FIG. In the position immediately after the complete swivel hook is removed from the mold, the axial connections do not rotate freely relative to each other. Accordingly, as shown in FIG. 6, the hook members 20 and 21 are moved relative to each other so that the cylindrical portion of the frustoconical projection is located within the frustoconical hole. In other words, in FIG. 3, hook member 21 is moved from face 25 to face 26 of yoke member 20. By this measure, the frustoconical bearing surfaces of the two members are slightly separated, allowing free rotation between them, which is satisfactory for the swivel hook.

Of course, it is clear that the method described above for die-casting this swivel hook can also be applied to molding a plastic swivel hook. In the device of the present invention, it has been found that an offset of up to 0.125 mm (0.005 inch) between the axis of the cylindrical projection and the axis of the frustoconical hole does not preclude creating a completely free connection.

In another embodiment of the invention, as shown in FIGS. 7-9, the swivel hook is specifically adapted to be mounted on a ceiling without the use of locking means such as screws.
This device consists of a plate 50 that is attached to the ceiling and a rotary hook 51 that can be attached to and removed from the plate 50.

Looking at FIG. 8, the plate 50 is circular;
It has an upper surface 52 that is in close contact with the ceiling. A central hole 53 passes through this plate so that it can be attached to the ceiling with conventional fastening means such as screws. Furthermore, this plate has an upper surface 52
It has guides in the form of a pair of parallel downwardly extending protrusions 54 on either side of a plane 55 parallel to . The opposing faces of this protrusion 54 are oblique so that they are spaced apart closer to the plane 55 than at the bottom of the protrusion in order to form a guide. For example, the slope of opposing surface 56 is angled from plate 50 at 30 degrees relative to the vertical. Furthermore, this opposing surface 5
6 do not run exactly parallel, but are closer at one end than at the other. Therefore,
When the engagement piece is inserted into the guide formed by the protrusion 54 of the plane 55, this engagement piece is fixed in the desired position. Furthermore, although apertures 57 are provided in the plane 55, they may, if desired, extend completely through the plate 50 to simplify its manufacture. Also, as can be seen in the drawings, the mounting hole 53 passes through the plane 55.

Referring to FIG. 9, the swivel hook is formed from a hook member 60 and a mounting yoke member 61.
The mounting yoke member has a lower bridge 62 having a frustoconical hole therethrough, and a hook member 60 extends upwardly formed in the same manner as described in FIGS. With the protrusion 63, a rotational connection is provided between the yoke member 61 and the hook member 60 in the same manner as in the previous procedure. The upper part of this yoke member 61 is formed to fit the guide of the plate 50. Therefore, this yoke member
5 and an upper plane 64 bounded on both sides by inclined surfaces 65 made to match the configuration of the opposing surface 56. Furthermore, a projection 66 is provided on the plane 64, which projection engages in the aperture 57 when the swivel hook 51 is mounted on the plate 0.

To use this plate 50, this plate 50 is fixed to the ceiling, for example by screws, and
plate 50 until protrusion 66 engages aperture 57.
The swivel hook is attached to plate 50 by sliding the top surface of yoke member 61 with the mating bottom surface of yoke member 61 . Engagement of protrusion 66 with aperture 57 is used to rotate hook 51 into position. Furthermore, the non-parallel engaging portions of the edges of the protrusions 54 and the corresponding rotating hooks 5
The non-parallel engaging portions on the first surface 65 are used to secure the hook 51 around the plate 50. Therefore, this rotary hook 51 has two means:
That is, by means of the matching guide means and the upper part of the yoke member 61, and by the protrusion 66 and the aperture 57, the plate 50
be made to remain motionless against

The swivel hooks shown in Figures 7-9 are particularly suitable for suspending items such as flower pots from the ceiling, although other applications are obvious. This plate 50 is similar to the aforementioned rotary hook 51,
It can be die-cast from metal or molded from plastic. Also, the swivel hooks according to FIGS. 7-9 can be made with a desired decorative structure, thereby making them convenient for use in locations where purely utilitarian hooks would not be suitable.

Other embodiments of swivel hooks according to the invention are shown in FIGS. 10-12. This swivel hook has a hook member 70 made in the same manner as the swivel hook described in FIGS. 1-6. Furthermore, the first
The swivel hook of FIGS. 0-12 includes a yoke member 71 having a central frustoconical hole forming a bearing surface for the protrusion of the hook member 70. This yoke member 7
1 are separately pivoted to both ends of a yoke member 73, and a center hole 74 is provided in the yoke member 73 for fixing this rotating hook. The axial connection of yoke members 71 and 73 is also made by casting techniques, in which case one of these members, for example yoke member 73, has a frustoconical projection that is engaged in a frustoconical hole in yoke member 71. It has 75.

The rotary hook of Figures 10-12 has several advantages. That is, as mentioned above, the swivel hook is fixed by means of a screw passing through the hole 74 of the yoke member 73, and for this fixation, the yoke member 71 is pivoted so as not to be aligned with the center of the yoke member 73. (that is, tilted) so that the fastening screw can be inserted into the fastening hole 74 without any difficulty. Furthermore, the swivel hooks shown in FIGS. 10-12 are provided with a swivel configuration, so that they can be fixed to the ceiling as shown in FIG. 10, or to a vertical surface as shown in FIG. It is also fixed.

The swivel hooks of Figures 10-12 may be made by die casting metal or by molding a suitable plastic. By way of example, this swivel hook is formed in a two-step process consisting of a first step of making the hook member 70 and yoke member 73, and a second step of making the center yoke member 71. The bearing surfaces of the hook member 70 and the yoke member 73 are used as surfaces. Alternatively, the central yoke member 71 may be die cast or molded first, and then the yoke member 73 or hook member 70 may be die cast or molded at the same time. Thereby, the bearing surface of the yoke member 71 is connected to the yoke member 73 and the hook member 7.
0 corresponding bearing surface casting.

Additionally, in another embodiment of the swivel hook according to the invention, as shown in FIGS. 13-15, the yoke member 80 includes a securing screw 81 secured to its central portion. The bridge member 82 is the yoke member 80
and has, for example, a cylindrical cross section,
It has protrusions 83 extending at both ends of the yoke member 80 forming an axial connection. The swivel hook of FIGS. 13-15 also includes a hook member 85 formed in the same manner as the hook member of the embodiment of the invention described in FIGS. 1-6. The bridge member 82 has a central frustoconical bore with a bearing surface for the frustoconical projection of the hook member 85. Also, 13th to 1st
The hook shown in Figure 5 can rotate freely, so the first
It is conveniently fixed to the ceiling as shown in FIG. 3, and also conveniently fixed to the wall as shown in FIG.

The rotating hooks in Figures 13 to 15 are
Made by the same die-casting or molding techniques used to make the hooks in the figure. For example, bridge member 82 is first cast or molded, then yoke member 80 and hook member 85 are simultaneously cast or molded, and a bearing surface mold is used to cast yoke member 80 and hook member 85. The bearing surface of the bridge member 82 is utilized. Alternatively, of course, the hook member 85 and yoke member 80 may be first cast together and then the bridge member 82 as described above. The screws 81 may also be die cast as an integral part of the yoke member 80 or constructed by threading into a solid member into which the yoke member 80 is cast. As seen in FIGS. 13-15, the yoke member 80 has an airfoil or airfoil nut-like function so that the user can apply torque to the yoke member 80 with his or her fingers. This makes it easier to attach the rotating hook because an auxiliary tool such as a screwdriver is not required to drive the screw 81 into a certain surface.

The swivel hooks of FIGS. 16 and 17 are different from the swivel hooks previously described. That is, in the above-mentioned configuration, the rotary hook is composed of a lower hook member 90 and an upper hook member 91, and these hook members are rotatable together by a shaft coupling portion 92. The relative rotation axis of these hook members 90 and 91 is the member 9 in the farthest range from the coupling portion 92.
It intersects with the hook part of 0.91. As a result, the forces acting on the shaft coupling due to the loads of these hook-like members are applied in the axial direction through this shaft coupling member 92. The axial coupling 92 of this embodiment of the invention is made in the same manner and in the same manner as the swivel hook previously described.

As shown in FIG. 16, the diameter of the hook-like portion of member 91 is substantially greater than the diameter of the hook-like portion of lower member 90 by about three times. This swivel hook is particularly useful when hanging items in locations where suitable hanging fixtures are inappropriate or undesirable. For example, as shown in FIG. 16, the swivel hook is used to suspend objects from cylindrical members such as pipes or other structural members such as beams, gutters, etc. In the apparatus of FIG. 17, the two hook-like members are of substantially the same diameter so that objects can be suspended from small structural members, conventional hooks, rope rings, and the like.

In the embodiment of the invention shown in FIGS. 18-20, a swivel hook 95 is provided as an end fixed to one end of a wood or plastic rod 96 for the chain bracket. The other end of the rod 96 is attached to a die cast or molded member 97 which is rotated in a vertical hole in an extension 98 of a wall bracket 99. Chain 100 has rotating hook 95
It extends from the wall bracket 99 to another wall bracket 101 provided above the bracket 99. The swivel hook 95 has a fixing member 102 having a socket for receiving the end of the rod 96. The end 103 of the swivel remote from the rod 96 is generally T-shaped for receiving the lower end of the chain 100. A hook member 104 extends downwardly from the fixing member 102 and is pivotally attached to a coupling portion 105 formed by the previously described axial coupling method. As a result, hook member 104 is rotated about a vertical axis to the desired orientation.

In the apparatus of FIGS. 18-20, mounting bracket 99 and mold member 97 are preferably arranged so that rod 96 can be secured to the wall at any angular position. For this purpose,
The extension 98 of the bracket 99 has a polygonal hole and the end 106 of the mold member 97 is bifurcated with a polygonal bridge 107 extending vertically into a slot formed in the bifurcated end. The aperture in the extension 98 has the same number of sides as the barbs of the polygonal bridge, through which the bridge 107 passes. The sides of this bridge 107 are tapered downwardly, and the length of this bridge is greater than the thickness of extension 98. As a result, when member 97 is in its lowest position, the aperture in extension 98 prevents rotation of the rod relative to the wall. However, since the angular position of the rod 96 is changed by lifting the rod against the wall, the smallest end of the bridge allows the rod to be rotated relative to the wall within its hole. Therefore, when the aperture and bridge are polygonal, FIG. 19 shows different fixing positions of the rod 96. In order to prevent undesired rotation of this rod 96, the chain 100 is attached to a hook 104.
It is connected to a rotating hook 95 at a point farther away from the wall than the rotation axis of the rotating shaft. As a result, when an object is suspended from the hook 104, the moment exerts a downward force on the member 97 so as to force the bridge 107 into a large cutting area in the aperture of the extension 98.

Devices according to the broad scope of the invention may be used on other objects such as cable eyes and threaded bolts, as well as many other types of objects. Additionally, suspension devices such as those of FIGS. 7-9 may be used with suspension devices such as quarter-turn stops.

As described above, according to the present invention, it is easy to create a revolving hook that can be used in a part of the mold for the truncated conical hole of the yoke member, the protrusion of the hook member can be formed by die-casting, and that both members can be rotated relative to each other. can be obtained.

[Brief explanation of the drawing]

1 is a perspective view of a rotating hook according to a first embodiment of the present invention, FIG. 2 is a plan view of the hook of FIG. 1,
Figures 3 and 4 are enlarged detailed views of parts of the hooks in Figures 1 and 2, Figures 5 and 6 are simplified views of the final form of the hooks in Figure 1, and Figures 7 to 9 are A perspective view of a rotating hook according to a second embodiment of the present invention, FIGS. 10 to 12 are views showing a third embodiment of a rotating hook according to the present invention, and FIGS. FIG. 16 is a side view of still another hook of the present invention, FIG. 17 is a modified view of the rotary hook of FIG. 16, and FIGS. Still another side view and top view of the swivel hook, FIG. 20 is a front view of the swivel hook of FIGS. 18 and 19. 20... Yoke member, 21... Hook member, 2
3... U-shaped member, 24... Bridge, 27... truncated conical hole, 30... Projection, 31... Cylindrical part, 33
... Enlarged part, 35 ... Mold member, 36, 37, 3
8, 40... Blank space, 39... Tapered pin, 4
1... open hole, 42... core rod.

Claims (1)

[Scope of Claims] 1. A hook member having a frustoconical projection having a small diameter end, a maximum diameter smaller than the small diameter end of the frustoconical projection, and an axial length substantially shorter than an axial length of the frustoconical projection. an extension portion extending to a small diameter end of the frustoconical projection; and an enlarged portion provided at a free end of the extension portion and having a diameter larger than the diameter of the small diameter end of the frustum cone projection; a frustoconical hole having a length approximately equal to the length of the frustoconical projection of the hook member and having a diameter dimension approximately equal to that of the frustoconical projection so that the frustoconical projection fits when inserted; A rotating hook, characterized in that it has: a mounting means for the hook comprising a member having the following features: 2. The attachment means having the truncated conical hole comprises a bridge fixedly extending between the ends of the U-shaped attachment member, and the truncated conical hole passes through the bridge. range 1
Rotary hook as described in section. 3. The mounting means includes a first U-shaped yoke member;
The first U-shaped yoke member has a frustoconical hole penetrating through the center thereof, and a second U-shaped mounting yoke member, and the end portion of the first U-shaped yoke member is connected to the second U-shaped yoke member. The second U-shaped mounting yoke member is pivoted to each end thereof, and a mounting hole is provided in the center hole of the second U-shaped mounting yoke member. Around the corner. 4. The mounting means includes a bridge member, the frustoconical hole passing through the bridge member, and a U-shaped mounting yoke member, and an end of the bridge member is connected to an end of the U-shaped mounting yoke member. 2. A rotary hook according to claim 1, wherein the rotary hook is pivoted on the swivel hook. 5. The mounting means further includes a fixing screw fixedly fixed to the center of the U-shaped yoke member and extending on the side opposite to the pivoting axis of the bridge member, and the U-shaped yoke member has an airfoil shape. 2. The rotary hook according to claim 1, wherein the rotary hook has a shape and is used as a screwdriver for screwing the screw into a device surface. 6. The attachment means comprises a plate having a first surface suitable for attachment to the attachment surface, an attachment hole extending through and through the center of the plate, and an attachment hole extending laterally to the first surface. a pair of protrusions defining a guide groove, the mounting yoke member having an end shaped to fit within the guide groove, and the frustoconical hole passing through the mounting yoke member. A rotating hook according to claim 1, characterized in that: 7. The mounting means includes a hook-like member, and the axis of the protrusion intersects the hook-like member and the hook member at a portion farthest from the mutual axial joint of the hook member and the hook-like member. A rotating hook according to claim 1, characterized in that: 8. The rotating hook according to claim 7, wherein the hook-like member has a larger diameter than the hook member. 9. The swivel hook of claim 8, wherein said hook-like member has substantially the same diameter as said hook member. 10 said swivel hook attachment means including means for receiving a horizontal rod and means for connecting said attachment means to a chain, said hook member including means for connecting said means for receiving a rod and said chain; 2. A swivel hook for use with a chain bracket as claimed in claim 1, characterized in that it is pivoted to said mounting means at a point between said swivels. 11. The mounting means includes a rod having one end for mounting a hook member mounting portion, a means for mounting the other end of the rod on a wall, and a portion between the hook member mounting portion and the wall at an upper point of the mounting means. Claim 10, characterized in that it includes an extending chain.
Swivel hook for using the chain described in section. 12. The means for attaching the rod to the wall includes a wall bracket having a polygonal hole, and a mounting portion at the other end of the rod having a tapered polygonal member passing through the polygonal hole, thereby: in one vertical portion of the installation of the rod, the rod is held in a fixed angular position with respect to the wall;
12. A swivel hook with a bracket as claimed in claim 11, characterized in that in other positions said rod makes an angular rotation with respect to said corner.