JPS5944142B2 - Saruto hook and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a swivel hook having components that are rotatable relative to each other, and in particular in such a way that the axial connections between those components are completely free to rotate relative to each other. This article concerns a method of manufacturing a rotating hook.

The rotating hook manufactured by the manufacturing method of the present invention includes first and second structural members assembled so as to be axially connected therebetween.

This first member 20 has first and second members facing and separated from each other.
having a frustoconically shaped first hole 27 extending between the faces thereof and having a first diameter at said first face and a diameter less than the first diameter at said second face; There is.

The second member, which serves as the hook portion of the rotating hook, has a truncated conical protrusion that fits into the truncated conical hole of the first member.

The extension on the protrusion of the second member has a maximum diameter at the minimum diameter end of the frustoconical section that is less than the minimum diameter end of the frustoconical bore.

This configuration allows the protrusion to move relative to the frustoconical bore, so that the extension extends parallel to the axial line at the end of the frustoconical bore, thereby supporting the frustoconical bearing. Appropriate gaps are provided on the 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 frustoconical hole of the first member as part of the mold by die-casting the protrusion of the second member, as described below, By moving the protruding truncated conical hole in the direction of its larger diameter, a mutually rotatable connection can be created with the truncated conical part.

A method of making a swivel hook of the present invention includes the steps of: forming a first member 20; opposing third and fourth surfaces separated by a distance substantially less than the distance between the first and second surfaces; and,
a fifth surface opposite to the fourth surface; a second hole 44 extending between the third and fourth surfaces; and a fifth surface extending between the fourth and fifth surfaces. 3, and the second hole 44 has a maximum diameter smaller than the diameter of the first hole 27 at the second surface of the first member 20, that is, the diameter of the small diameter end. However, the third hole 45 has a minimum diameter larger than the diameter of the small diameter end.

preparing a mold for the second member 21;
The second surface of the member 20 is brought into contact with the third surface of the mold, the first and second holes 27.44 are aligned, and the first member 20 is formed into a second member 21. combining said mold for use as part of a mold for;
The material set in the first, second and third holes 27, 44, 45 is poured to form the second member 21, whereby a truncated conical joint is formed between the first and second members. removing the mold from the first and second members 20.21; and removing the mold from the second surface to free the truncated conical joint. The second member 21 is moved relative to the first member 20 in the direction from the direction toward the first surface.

In short, according to one aspect of the invention, in order to make said member rotatable relative to the first and second axes, the first member is first formed with a truncated conical 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 comprising a protruding bearing surface has an extension having a maximum diameter smaller than the minimum diameter end of the frustoconical bearing surface.

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 such that this extension moves in the direction of the larger end of the trapezoidal foramen of 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.

FIG. 1 shows an example of a rotating hook manufactured by the manufacturing method of the present invention, which is constructed from two single 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 a hook around such material,
The rotating hook can be designed decoratively to emphasize the appearance of the rotating hook.

To use the swivel hook of FIG. 1, a yoke member 20 is provided which is connected to a suitable mounting member such that the hook member 21 is pivoted to any angular position for hanging objects.

If desired, the yoke member 20 is provided with a hole (not shown) passing vertically through the top of the yoke member for attaching a hook by other means.

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, ordinary die-casting or plastic molding techniques can be used to create free shaft rotation. cannot be used for

As will be clear from the following text, the swivel hook manufactured by the manufacturing method of the invention, in addition to having a joint that allows free rotation of other objects, is particularly directed to the configuration of the hook member.

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 (Marin).

Figures 2-4 more clearly depict the circumferential hook of Figure 1.

FIG. 2 is a plan view of the assembled hook after the yoke 20 and hook member 21 are die cast or molded, and FIGS. 3 and 4 are enlarged plan views of the yoke member 20 and hook member 21, respectively. It's a diagram.

In Figures 1 and 2, the yoke member is comprised of a U half 23 forming the upper part of the swivel hook, the ends of the U half 23 being joined by a bridge 24 across it.

This bridge 24 is at least near the frustoconical hole 27,
It has generally planar upper and lower surfaces 25 and 26, with a frustoconical hole 27 passing through the bridge 24 between the upper and lower surfaces 25, 26.

Further, this truncated conical hole 27 forms a truncated conical bearing surface,
It 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 3 having the same taper as the frustoconical hole 27 of the yoke member and having substantially the same axial length.
0 is set.

The cylindrical portion 31 is a coplanar 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 portion 31 has a diameter of 0.571 cm (0.225 inches) and the small diameter end of the protrusion 30 has a diameter of 0.596 cm.
It has a diameter of frL (0,235 inches).

Further, the axial length of the cylindrical portion 31 is substantially shorter than the axial length of the truncated conical portion 30.

For example, in one embodiment of the invention, the cylindrical portion 31 is 0.10
With an axial length of 9 cmC0,043 inches), the truncated conical part 30
has an axial length of 0.21 inches (0.533 cm), which is equal to the axial length of the frustoconical hole 27 in the yoke member.

The enlarged part 32 is provided at the upper end of the cylindrical part 31 , and has an outer diameter larger than the diameter of the small diameter end of the truncated conical part 30 . 33 is the upper surface 25 of the bridge 24 of the yoke member.
It is preferable that it be flat to engage with.

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, although in the above example part 31 is described as being cylindrical, 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 it is clear that its maximum diameter should be smaller than the small diameter end of the truncated conical hole 27.

FIG. 5 illustrates a simplified casting technique for forming the round 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 first cavity 36 shown in FIG. It has a second cavity 37 in the form of a yoke member adjacent to the cavity 38 forming the hook member in a relative position.

In order to provide the mold with means for forming the frustoconical hole 27,
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 initial casting, the yoke member with the frustoconical hole 27 in the bridge 24 is previously die cast and the cavity 3
Set to 7.

Thereafter, a suitable material, such as Zamak A3 zinc alloy, is inserted into the aperture 4 such that it flows through the cavity 40 around the core rod 42 to the cavity 36° 38 in the conventional manner.
1 into the mold.

Accordingly, 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.

After the material poured into each cavity has hardened, the pin 39 is withdrawn axially and the mold is opened.

The portion of the hardened infusion member formed around the core rod 42 can then slide along the surface of the core rod 42 so that the entire hardened infusion member integrally formed with that portion can be slid along the core rod 42. By moving it downward, the portion of the yoke formed in the space 36 is set in the space 37.

Since the cavity 36 using 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 part 38 has a cylindrical cavity 44 corresponding to the cylindrical part of the protrusion of the hook member, and an enlarged cavity 45 for forming the enlarged end of this cylindrical part integrally with the cylindrical part.

In the device shown in FIG. 5, as shown in FIG. 2, this cylindrical portion is moved from the truncated conical surface of the yoke member in the direction in which the U-shaped portion of the yoke member is attached.

In the position immediately after the complete rotation hook is removed from the mold, the axial connections do not rotate freely relative to each other.

As shown in FIG.
and 21 are moved relatively.

In other words, the hook member 21 is the yoke member 2 in FIG.
0 from the plane 25 to the plane 26.

By this measure, the frustoconical bearing surfaces of the two members are slightly separated, allowing free axial rotation between them, which is satisfactory for the swivel hook.

Of course, it is clear that the method described above for forming this swivel hook by die-casting can also be applied to molding a swivel hook from plastic.

In the device of the present invention, it has been found that an offset of up to 0.125W111L (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. Ta.

As shown in FIGS. 7 to 9, in another example of a swivel hook according to the manufacturing method of the present invention, the swivel hook is particularly adapted to be mounted on a ceiling without using any locking means such as screws. There is.

This device consists of a plate 50 that is attached to the ceiling, and a rotating hook 51 that can be attached to and detached from the plate 50.

Referring to FIG. 8, the plate 50 is circular and 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 guides in the form of a pair of downwardly extending parallel projections 54 on either side of a plane 55 parallel to the upper surface 52.

Since the opposing faces of this protrusion 54 are oblique, they are spaced closer to the plane 55 than at the bottom of the protrusion in order to form a guide.

for example. The slope of the opposing surface 56 is 30 degrees from the plate 50 with respect to the vertical line.

Furthermore, the opposing surfaces 56 do not extend exactly parallel, but are closer at one end than at the other end.

Therefore, when the engaging piece is inserted into the guide formed by the protrusion 54 of the plane 55, this retaining 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 rotating 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 also has a hook member 60.
has an upwardly extending protrusion 63 formed in the same manner as described in FIGS. is provided in between.

The upper part of this yoke member 61 is formed in a 5-5 shape to fit the guide of the plate 50.

This yoke member thus has an upper planar surface 64 bounded on both sides by inclined surfaces 65 made to match the configuration of the planar surface 55 and the opposing surface 56 of the plate 50.

Furthermore, a protrusion 66 is provided in the plane 64, which protrusion 66 is arranged in the aperture 5 when the swivel hook 51 is mounted on the plate 50.
7.

To use this plate 50, it is fixed to the ceiling, for example by screws, and by sliding the matching underside of the plate 50 over the top side of the yoke member 61 until the projections 66 engage the apertures 57. , a rotating hook is attached to the plate 50.

Engagement of protrusion 66 with aperture 57 is used to lock hook 51 in place.

Furthermore, the non-parallel retaining portions of the edges of the projections 54 and the corresponding non-parallel retaining portions of the surfaces 65 of the rotating hooks 51,
It is used for fixing the hook 51 around the plate 50.

This swivel hook 51 is thus immobilized relative to the plate 50 by two means: the matching guide means and the upper part of the yoke member 61 and the projection 66 and the aperture 57.

The swivel hooks shown in Figures 7-9 are particularly suitable for suspending items such as flower pots from the ceiling, although it is obvious that they have other applications as well.

This plate 50 is made of die-cast metal, similar to the above-mentioned rotating hook 51, but is molded with a plastic member.

Also, the wraparound hook according to FIGS. 7-9 can be made with a desired decorative structure, thereby making it convenient for use in locations where purely utilitarian hooks would be inappropriate.

Still other examples of rotating hooks manufactured by the manufacturing method of the present 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.

Additionally, the swivel hook of FIGS. 10-12 includes a yoke member 71 having a central frustoconical hole forming a bearing surface for the protrusion of the hook member 70.

Both ends of this yoke member 71 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 a hook around this hole.

The axial connection of yoke members 71 and 73 may also be made by casting techniques, in which case one of the members, for example yoke member 73, has a frustoconical projection 75 that is engaged in a frustoconical hole in yoke member 71. It is equipped with

The swivel hooks of Figures 10-12 have several advantages.

That is, as mentioned above, the rotating 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. (i.e. tilted) so that the fastening screw can be inserted into the fastening hole 74 without any difficulty.

Furthermore, the rotating hooks shown in FIGS. 10-12 are provided with a flexible connection 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 circumferential hook is formed in a two-step process, with a first step of creating the hook member 70 and yoke member 73, and then a second step of creating the central yoke member 71.

The central yoke member 71 uses the bearing surfaces of the hook member 70 and the yoke member 73 as corresponding bearing 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
3 and the corresponding mold of the bearing surface of the hook member 70.

Furthermore, in yet another example of the rotating hook manufactured by the manufacturing method of the present invention, as shown in FIGS. 13 to 15, a yoke member 80 is provided with a fixing screw 81 fixed to the center portion thereof.

The bridge member 82 is pivotally attached between both ends of the yoke member 80, and has a protrusion 83, for example, having a cylindrical cross section and extending to both ends of the yoke member 80 forming an axial connection.

The round 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.

Bridge member 82 has a central frustoconical bore with a bearing surface for the frustoconical protrusion of hook member 85 .

In addition, since the hooks shown in Figures 13 to 15 can freely rotate, they can be conveniently fixed to the ceiling as shown in Fig. 13, or conveniently fixed to the wall as shown in Fig. 14. Ru.

The swivel hooks of Figures 13-15 are made by the same die casting or molding techniques used to make the swivel hooks of Figures 10-12.

For example, bridge member 82 is first cast or molded, then yoke member 80 and hook member 85 are cast or molded simultaneously, 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, hook member 85 and yoke member 80 may be first cast together, and then bridge member 82 may be cast 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 Figures 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 is because an auxiliary tool such as a screwdriver is not required to drive the screw 81 into the mounting surface, making it easier to attach the rotating hook.

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 consists of a lower hook member 90 and an upper hook member 91, and these hook members are rotatable together at the shaft coupling portion 92.

The relative rotation axes of these hook members 90 and 91 are connected to the connecting portion 9
2 intersects the hook portion of member 90.91.

As a result, the force acting on the shaft coupling part due to the load of these hook-like members is 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 hooked portion of member 91 is substantially greater than the diameter of the hooked portion of lower member 90 by about three times.

This wraparound hook is particularly useful when hanging items where it is inappropriate or undesirable to provide suitable hanging fixtures.

For example, as shown in FIG. 16, the wrap hook is used to hang 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, ordinary hooks, cord rings, and the like.

In the example of a swivel hook manufactured by the manufacturing method of the present invention shown in FIGS. 18-20, the swivel hook 95 is provided as an end fixed to one end of a wood or plastic rod 96 for the Cheno bracket. ing.

The other end of this rod 96 is an extension 98 of the wall bracket 99.
Die-cast or molded part 9 rotated in a vertical hole of
It is attached to 7.

The chino 100 extends from the rotating hook 95 to another wall bracket 101 provided above the bracket 99.

This swivel hook 95 has a fixing member 102 with a socket for receiving the end of the rod 96.

The end 103 of the swivel hook remote from the rod 96 is generally T-shaped for receiving the lower end of the chino 100.

A hook member 104 extends downwardly from the fixation member 102 and connects the coupling 10 formed in the manner of axial coupling previously described.
It is pivoted to 5.

As a result, hook member 104 is rotated about a vertical axis to the desired orientation.

In the apparatus of FIGS. 18-20, the mounting bracket 99
It is desirable that the molded member 97 be arranged so that the rod 96 can be fixed 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 molded member 97 is bifurcated, with a polygonal bridge 107 perpendicular to the slot formed in this bifurcated end. It extends to

The aperture in the extension 98 has the same number of sides as the sides of the polygonal bridge, and the bridge 107 passes through this aperture.

The sides of this bridge 107 are tapered downward,
The length of this bridge is greater than the thickness of extension 98.

As a result, when member 97 is at 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 this rod relative to the wall, the smallest end of this bridge allows the rod to be rotated relative to the wall within its hole.

Therefore, when the opening and the bridge are polygonal, the 19th
The figures show different fixing positions of the rod 96.

In order to prevent undesired rotation of the rod 96, the chino 100 is connected to the rotating hook 95 at a point farther from the wall than the axis of rotation of the hook 104.

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 cut area in the aperture of the extension 98.

The method according to the broad scope of the invention may be used with other objects such as cable eyes and threaded bolts, as well as with many other shapes 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, the truncated conical hole of the yoke member is used as a part of the mold, and the protrusion of the hook member is formed by die-casting, and furthermore, it is easy to create a revolving hook that can rotate both members. can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a first example of the rotating hook manufactured by the manufacturing method of the present invention, FIG. 2 is a plan view of the hook of FIG. 1, and FIGS. FIG. 5 is an enlarged detailed view of a part of the hook shown in FIG. 5, and FIG. A simple diagram of the final shape of the hook in Figure 1, No. 7~
FIG. 9 is a perspective view of a second example of a rotating hook manufactured by the manufacturing method of the present invention, FIGS. 10 to 12 are views showing a third example of a rotating hook manufactured by the present invention, and FIG. ~
FIG. 15 is a diagram showing a fourth example of a rotating hook manufactured according to the present invention, FIG. 16 is a side view of yet another hook, and FIG. 17 is a modified view of the rotating hook of FIG. 16. 18
．． 19 is a side view and a plan view of yet another rotating hook, and FIG. 20 is a front view of the rotating hook of FIGS. 18 and 19. 20... Yoke member, 21... Hook member, 23.
...U-shaped member, 24...bridge, 27...truncated conical hole, 30...protrusion, 31...cylindrical part, 33...
Enlarged portion, 35...mold member, 36. 37. 38.
40... Blank space, 39... Tapered pin, 41.
...Open hole, 42...Core rod.

Claims (1)

[Scope of Claims] 1. A rotating device having a first member and a second member rotatably coupled, at least one of the first member and the second member being formed as a hook portion. In a method of making a hook, the hook extends between oppositely spaced first and second surfaces, has a first diameter at the first surface, and has a first diameter smaller than the first diameter at the second surface. forming the first member with a frustoconically shaped first hole having a small diameter; and an opposing third member spaced apart by a distance substantially less than the distance between the first and second surfaces. and a fourth surface, a fifth surface opposite to the fourth surface, a second hole extending between the third and fourth surfaces, and a second hole extending between the fourth and fifth surfaces. a third aperture extending between the second aperture and the second aperture, the second aperture having a maximum diameter less than the diameter of the first aperture at the second surface of the first member; The third hole has a minimum diameter that is greater than the diameter of the first hole at the second surface. providing a mold for a second member; abutting a second side of the first member against a third side of the mold and aligning the first and second holes; 1st
combining said member with said mold for use as part of a mold for forming a second member; pouring material set into the second and third holes to form a second member, thereby forming a frustoconically shaped joint between the first and second members; removing the mold from the first and second members;
and moving a second member relative to the first member in a direction from the surface toward the first surface. 2. In the step of forming the first member described in @, molding is performed by die-casting, and in the step of pouring the setting material as described in @, the die-casting material is press-fitted into the first, second and third holes. A manufacturing method according to claim 1.