JPS6065937A - Slender connecting chain link - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elongated chain link, particularly for ships, or a chain link connecting two chains to each other.

The connecting links should not have much lower tensile strength and fatigue than the links common to the six chains. The articulating links must also have substantially the same shape and dimensions as the common link so that the linked chains pass through the same holes and are wound on the same winch drum as the six chains. Articulating links must be easy to assemble and disassemble, even under adverse environmental conditions.

Many different articulating links have already been proposed and described in patent publications. The links are divided into one or two groups. That is, they have an entrance for two chain end links in the middle of one side (Ic type 1 link) and also have two main parts that are identical in shape and dimensions and can be locked to each other by a locking means. made of parts.

The present invention relates to linking links belonging to the latter group. A typical example of a known articulating link of this type is described, for example, in German patent specification no. Attachments on each side (in the direction of the transverse axis of the links) relative to the central part are connected with the apex parts defining loops that accommodate the end links of the chain. The link is divided into two identical halves along complementary circumferential contact surfaces. The two identical halves are made up of one half of the central portion (divided approximately along said horizontal axis) and the remaining half of the link. That is, ° about 6 at one vertex
/4 and about 174 at the other vertex.

The two link halves are held together by locking means constituted by a bolt extending diagonally through the central portion, and two cylindrical shapes projecting one from each said contact surface of one of the link halves. They are held together by co-operative engagement means constituted by stamps and housed in cylindrical recesses in the corresponding contact surfaces of the other link halves.

In all chain links, there is always a risk of deformations occurring even in the direction transverse to the transverse axis. The part of the link in which the recesses are arranged is not sufficiently fixed against outward bending, and in particular the presence of the recesses results in a significant local reduction of a significant portion of the link cross-sectional area at each location. do. The recess forms a blind hole that can be easily filled by the foreign body arrest preparation assembly, and it is also somewhat expensive to make an integral cylindrical stamp that projects from the surrounding surface. The circumferential contact surface consists of two parts, each extending from a point of origin at the outer circumference of the link to an end point at the inner circumference of one of the loops. Both the origin and destination are on the same side of the link's vertical axis,
The horizontal axis is divided into two. The starting point is placed adjacent to the apex of the link, that is, the location where the horizontal axis intersects the outer circumference.

However, this is also the point where the link is exposed to the greatest shear forces during use.

Another articulating link of said second group is described in German Patent Specification No. 1197291. Each contact surface has the shape of a row of saw teeth. The origin and destination are on different sides of the longitudinal axis of the link. At both points of origin, relatively elongated wedge-shaped ears are formed which bend and considerably increase the longitudinal dimension of the link when extreme longitudinal stresses are applied.

It is an object of the present invention to provide an articulated chain link having an effective area for interengaging the contact surface portions in order to increase the resistance against tensile and deforming stresses.

Another object of the invention is to provide an articulated chain link having a particularly increased resistance to deformation in both directions of the longitudinal axis at the location of the origin of the two contact surfaces.

In FIGS. 1 to 6, the elongated connecting chain link 10
0 is two vertices z1 and the horizontal axis X- passing through the vertices,
It has an outer circumferential surface C formed by a vertical axis Y-Y, which divides the horizontal axis into two at a point V. The link consists of a central portion 101 divided into two parts by the vertical axis Y-Y and having a predetermined length N along the horizontal axis XX. two vertex parts 101,1
03'b are mutually central portions 101 along the horizontal axis XX.
combine. The central portion 101 occupies the position in the articulating link 100 that is generally occupied by the central stud in the chain link, if a stud is provided. Each apex portion 103A, 103'b has a central portion 10
1 and the loops 103, 106/ are integrally defined and accommodate the respective end links of the two chains joined by another chain link 111, 112, and more precisely by an articulating link. Each loop 105.10 da is the inner circumferential surface 1
03g, 103'α.

The articulating link 100 is assembled from two main link parts 10.10' which are identical in shape and dimensions.

Each is made up of one of the apex portions 103AX103'b and a portion of the central portion 101 surrounded by a limiting surface. The two main link parts 10.10' press against each other along a first contact or assembly surface B and a second assembly surface y. In embodiment 100, a pair of bolts 104.1
Since there are no further elements outside of the locking means defined by 041, each main link part 10.10F realizes a full half of the entire link 100, and the limiter has two main parts. define another surface of direct contact between the

The second contact surface y has a complementary shape to the first contact surface B. That is, it has the same shape as the first one, but reversed in the direction of said two axes, so that it has a sharp shape, especially when the protrusion is formed along the second contact surface y. is formed along the first contact surface B. The same is true vice versa. As will be readily apparent upon examination of the drawings, in an assembled articulation link, a first contact surface of one main link portion presses against a second contact surface of a second main link portion. The same is true vice versa.

Both contacts 10B1y are the starting point Js on the outer circumferential surface C of link 1[]0, and the inner circumferential edge 1 of each loop 103.106-.
The end point B1% in 06 extends between the bird. Each contact surface is made up of several parts. That is, the parts are angled relative to each other so that two adjacent parts have different orientations with respect to said axis.

The bolts 104 and 104' constituting the locking means have a horizontal axis X
- passing through the central portion 101 transversely (exactly at right angles in the illustrated embodiment) with respect to the threaded hole 104'A;
(Fig. 2). The bolt has a head 104'B provided with a hexagonal hole for a corresponding key.

The starting point B,, B', and the ending point Horse, Bird of each contact surface B, ]Ill'' are located on the same side of the vertical axis Y-Y, i.e. between this axis and the same vertex 2. The starting point B1, Atsushi is the final point BI
, are closer to the vertical axis than birds.

The starting point B,, B'', is as close as possible to the vertical axis <N/4 (6th
(Fig. 10), and even if the distance is at most N/2, the end point N (Fig. 10) is not very far apart from the vertical axis.

In the following description and claims, a
, I terminal (to) “, b, + to proximal (to) I , a
, *Outer (K)'', tL, and ``Inner o (K)1'' are used in the following meanings, respectively. That is, α, further away from vertex 2 of each main link component, b,
'4 horizontal axis approaching reconnaissance point 2 of each main link part! −
'It is used to mean further away from X, d, closer to the horizontal axis X-X.

The first contact surface B starts at an origin B1 and has a first surface portion or component surface 20 extending inwardly in the direction of the longitudinal axis relative to the inner end 20α by a predetermined distance 1 mdC (FIG. 6). From this inner end 20a to the distal end 21 in the direction of the horizontal axis X-X
The first retaining portion 21 protrudes up to 4. two parts 2
0.21 is the same surface portion 20 on the second contact surface B'
．． together define the limits of a first recess 41 for accommodating a first ear 41/ formed by 21. Hollow 41
are outwardly open, and the ears 41' are outwardly limited by the outer circumferential surface C. In order for the ear 41/ to be strong enough to resist the longitudinal outward deformation stress at the point of origin (the articulating link must be at about 2/3 of the link's nominal isthmus tension before tensioning) The distance d between the recess 41 and the ear 41' is the thickness of the link C ( 6).

Regarding the end point B on the inner circumferential surface 103α, the end point portion 25 extends outwardly therefrom in the direction of the longitudinal axis, and between this end point portion and the first retaining portion 21 there is provided a composite intermediate portion 22, A second retaining portion 23 and a connecting portion 24 are provided.

Composite intermediate section 22 consists of at least two, and in the embodiment of FIGS. 1 through 6, four subsections. The first sub-portion 22' is the distal end 21d of the first retaining portion.
starting at and extending longitudinally inwardly a predetermined distance therefrom. The two parts 21, 22 (or more precisely 22) together define a second ear 42'. Together with the first ear 41' on the other main link part, the second ear 42 Both directions (double arrows Q1Q in Figure 10 have starting points B, Bt
, the stresses are opposed in the region of .

The second retaining portion 26 extends between an outer end and an inner end in the direction of the longitudinal axis and is connected at the inner end to the fourth sub-portion 2γ and defines a sixth ear 43'. The second and third sub-portions 22'', 22' constitute additional recesses 45 for additional ears 45 on the other main link parts in the embodiments of FIGS. 1 to 6. It is formed like this.

An articulation portion 24 extends distally in the direction of the transverse axis from the outer end of the second retention portion 23 between the proximal and distal ends. It joins the terminal portion 25 at its outer end. In this way, a second kink 42 is obtained which has an articulating part 24 as a bottom restriction, a terminal part 25 as a distal lateral restriction and a second retaining part 2.5 as a proximal lateral restriction. The second corner 42 has two arrows P (the first
A fourth ear 44' is provided for receiving a fourth ear 44' in another main link part which faces lateral traction stresses in the direction of Figure 0).

Further means for counteracting lateral traction stresses are on the one hand the above-mentioned additional ears 45 and on the other hand the steps AI provided in the limiting surface A.

Chain links are approximately 45 mm from the horizontal axis measured from the center of each loop.
undergoes maximum shear stress at an angular distance of ″.

These positions are indicated in FIG. 3 by radii R1, R1. Starting point B1, IN, not Bakashi but ending point B,,
Birds are also present at a safe distance from these positions. Inner peripheral surfaces 106α, 103/(Z are straight and obtuse angles α, U of 100 to 104@, for example, with respect to the end point 25
It is formed at the end points B, , W, so as to extend . This p
1 in the direction perpendicular to the radius R, the link 111.11
Each loop 10'5.1 large enough to allow the introduction of 2
A passage G is provided at 06'.

In the embodiments of FIGS. 1 to 6, the entire surface portion extending in the direction of one axis was exactly parallel to each axis. In FIG. 4, such surface portions are 90' apart from each other.
``Example 1 in which the angles β, γ, and δ are large or small
00' is shown.

In this case, at least some inside corners within the corner are acute angles. At least one of these two surface portions is not always exactly parallel with respect to each axis, but approximately 15°
The angle is stretched. Restrictions Doujin parts subtend acute angles to each other - angles of up to 15° with respect to each axis. As a result, 1 extending in the direction of the ' axis is herein referred to as 1 with respect to each axis.
It is incorrect in the sense of 1 which extends the angle of ~15@.

The embodiment 1001 in FIG. This is different from Example 100.

FIG. 5 shows another modification of the main components of the chain link according to the invention. A sufficiently large passage σ is obtained by the side portions 22' of the intermediate portion 22, despite the increased dimensions R1, K, which extend significantly obliquely, i.e. subtending an angle of more than 15° with respect to the transverse axis.

In FIGS. 6 and 7, another embodiment 100N is shown made of two main link parts, which is a variation of the link part of FIG. The end portion 25 is composite and its outer portion 25' is contoured somewhat distally with respect to the inner portion 25', so that another additional contour 46 is obtained. This depression 43 is the second depression 42
is connected adjacent to and accommodates another additional ear 46/ on another main link part. With this additional recess 46,
Another ear 471 is also formed at the end, similar to the first ear 41/ at the origin in birds. The two ears 4da, 47' oppose each other in both directions of the vertical axis (double arrow QQ1 in FIG. 6) within the region of end point stress.

The thickness of the apex portions 101A, 103/A increases along the horizontal axis X-X toward adjacent parts of the central portion from a minimum value e to a maximum value E closer to the central portion, so that the apex portion increases in E. It essentially adopts the shape of a crane hook, which has great strength. Between position E and the adjacent end of restriction surface A, inner circumferential surfaces 106α, 103'! Part 103α
α, 103/αα is straight for better access to each loop.

In order to obtain a good fit of the two main parts 10.10', i.e. with their respective contact surfaces abutting each other along their entire length, and in order to increase the fatigue strength of the link, At least some of the inner corners obtained in the recess when the two surface portions meet at an angle of 90° or somewhat less are provided with a longer radius between each outer corner such as the corresponding ears 22A, 25A. 2213.23B (Fig. 7), which has a cylindrical surface with a small free space between these outer sides (
(Fig. 9).

Said inner corner is a very critical location in this type of link and it is therefore preferable to give the relief groove a surface with increased resistance, for example by hardening. However, it is preferred that the following steps are adopted according to the present invention. At the beginning of the production of the link part, a stock is used which has additional material U in each inner corner beyond its desired final shape. A hole is drilled into the excess material with a radius smaller than that of the relief groove. The hole is drilled to the desired radius (e.g. 5am) using a chip-free separation method.
will be expanded to. The expansion may be achieved, for example, by driving with a possible tapered shank of the one or the pedestal. This causes the material at the periphery of the hole to spread out in the area U'
is also compressed. In doing so, the unnecessary peripheral portion U' of excess material is removed.

Another solution to the problem of sufficient passage G is shown in Figures 8 to 10.
Embodiment 100/l, 100" in FIG.
0,10/ are somewhat shorter in the part constituting the central part, and that the third link member, i.e. the interpolation member 10B, is limited by the limiting surfaces A1, A1 complementary to those of the main link part. Two main parts 10° 10 similar to those of Figs. 6 and 7, except for the difference that they are inserted between the two main link parts.
It is assembled from '. Two unthreaded holes for locking holes 104, 104/ are provided in the interposer 10B. The chain links 111, 112 (FIG. 1) are guided into the loops 103, 103F before the interposer 10B is placed in place.

The embodiment 100 of FIG. 10 is a modification of the embodiment of FIG. 1 in which an interpolation component 10B was provided. This link 1
The top view of one major part 10 of the 00 differs from the top view of FIG. 3 only in that the full-limit dowel rests the blade under the transverse axis.

Both main link parts 10, 10' are single parts during manufacture, and the two parts in an inverse relationship constitute the two main link parts of one assembled link.

[Brief explanation of drawings]

FIG. 1 is a plan view of a first embodiment of a chain link according to the invention. FIG. 2 is an exploded perspective view of the link shown in FIG. 1. FIG. 3 is a plan view of one of the two main parts of the link of FIGS. 1 and 2; FIG. FIG. 4 is a plan view of the second embodiment. 5 is a plan view of one of the two main link parts of the link of FIG. 4; FIG. FIG. 6 is a plan view of the sixth embodiment. FIG. 7 is a plan view of one of the two main link parts of the link of FIG. 6; FIG. 8 is a plan view of the fourth embodiment. Figure 9 is the 8th
FIG. 3 is an exploded perspective view of the links in the figure. FIG. 10 is a plan view of the fifth embodiment. 100...Slender connecting slot 101...Central portion 10
3...Loop 103α00. Inner peripheral surface 103A...
Apex part 104... Bolt 10... Link part 111. 112... Another chain link B1... Starting point B,... End point Patent applicant Kokumsu Industri Akcheborag agent Patent attorney Sumiko Shimosaka

Claims (1)

[Claims] (1) Two vertices, a horizontal axis that passes through the vertices, and a horizontal axis that is
An elongated connecting chain link having an outer peripheral surface having a dividing vertical axis, the link having a central portion divided into two parts by the vertical axis and having a predetermined length along the horizontal axis; two apex portions joining said central portions and defining two loops accommodating further chain links and each having an inner circumferential surface, said connecting chain links being surrounded by two said central portions; Parts and parts,
The two main bearing parts abut each other along a first contact surface and a second contact surface having a complementary shape to the first contact surface, and the first and second contact surfaces a locking member traverses said central portion and comprises several portions extending between a starting point on an outer circumferential surface and an end point on an inner circumferential surface of one of said loops and oriented in different directions with respect to said two axes; all parts of the connecting chain link are releasably held together with respect to the horizontal axis, and the starting and ending points of each of the contact surfaces are on the same side of the longitudinal axis and the starting point and also close to the ending point. an elongated connecting chain link arranged such that the first contact surface comprises: (a) a first part opening extending from said starting point inwardly in the direction of the longitudinal axis by a predetermined distance to the inner end; projecting from said first part to the end in the direction of the horizontal axis at the inner end and separate from said first part; a first retaining portion defining the confines of a first recess for receiving a first ear of the primary link component; c) a termination portion extending outwardly in the direction of the longitudinal axis from said termination point; and an inner end and an outer end thereof; a second retaining portion extending in the direction of the longitudinal axis between said first retaining portions and said end point portion; a proximal end in the direction of the horizontal axis from an outer end of said second retaining portion; a second recess projecting in the direction and defining, together with said second retaining portion, one side limit of a second recess for receiving a bottom limit and a second ear of another main link part; to an articulating portion defined by an outer part of the end portion, extending between the first and second retaining portions and opposing longitudinal stresses with the first retaining portion;
(2) a composite intermediate portion defining a sixth ear cooperating with the ear and at the same time defining a fourth ear cooperating with the second ear in opposing transverse stress with the second retaining portion; said outer part in a proximal direction with respect to the receiving part of said terminal part such that said outer part is connected to a second recess made adjacent to the Q1 additional recess in the body and accommodating a sixth ear of another main link part. and the sixth ear is formed between the additional recess and the inner circumferential surface, such that the sixth ear and the seventh ear oppose longitudinal stresses in the region of the end position. Links according to claim 1, characterized in that they are collaborative. (3) The link according to claim (1), wherein at least a distal part of the inner circumferential surface is straight. (4) A separate interpolation part is provided in the central portion between the two main link parts and is bounded by a plane defined by the central limit plane of the two main link parts, thereby providing access to the loop of each main link part. Link according to claim 1, characterized in that access is facilitated during assembly. (5) A link according to claim 1, characterized in that the surface portion extending in one direction of said axis forms an angle of 0 to 15 degrees with respect to said axis. (6) At least two surface portions within the recess meet inter-internally at an angle of 90@ or close to so as to accommodate the 7m corresponding corner of the recess without stress. The link according to claim (1), characterized in that a clearance groove is provided at one location. (force) A clearance groove is created by additional material provided in the corresponding location of the main link part, a hole with a first diameter is drilled therein, and then a second, larger diameter is drilled by a chip-free separation method. 6. A link according to claim 6, wherein the link is enlarged and any residual material that adds to the final shape is removed. (8) The end portion is straight and The link according to claim 1, wherein the link is a non-synthetic body. (9) The first connecting portion extends inward from the end to the inner end of the first securing portion. a first sub-portion extending in the direction of the longitudinal axis; and a second sub-portion connecting the inner end of the first connecting portion to the inner end of the second retaining portion. A link according to claim 1, characterized in that the second sub-portion has a shoulder bent at its distal end forming an indentation between the sixth and fourth ears. The link according to claim (9). (11) The link according to claim (9), characterized in that the side portion is straight. (c) The predetermined distance is The link according to claim 1, characterized in that it is at least 1/4 of the thickness of the link along the horizontal axis.
Claim (1) characterized in that the horizontal axis increases from a minimum value to a maximum value at a point close to the central portion so as to adopt a shape comparable to the shape of the hook.
Links listed in section.