JP2019052688A - Chain sling and metal fittings therefor - Google Patents

Abstract

To provide metal fittings to which a link chain is surely coupled, while ensuring downsizing of the link chain, and a chain sling comprising the metal fittings.SOLUTION: A chain sling 1 comprises a link chain 2 and an upper metal fitting 3. The upper metal fitting 3 includes a first receiving recess 31 which receives a one-side first link 11, and an insertion recess 32 through which a one-side second link 12 is inserted. The first receiving recess 31 receives the one-side first link 11 in such a manner that parallel parts 47 of the one-side first link 11 are arranged side by side in a lateral direction. The insertion recess 32 is wider than a line diameter of the one-side second link 12 and narrower than an outer surface width of the one-side first link 11 in such a manner that the insertion of the one-side second link 12 is allowed and the insertion of the one-side first link 11 is regulated. The first receiving recess 31 includes an insertion recess partitioning part 36 which is continued to the insertion recess 32, and a first skirt part 37 which locks the one-side first link 11 to an edge of the insertion recess partitioning part 36.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a chain sling and its metal fitting.

  Conventionally, a chain sling including a link chain, a metal fitting that accommodates a link positioned at an end of the link chain, and a pin that is inserted into the link is known.

  For example, there has been proposed a chain sling including an H-shaped bracket having a groove, a chain coupled to the H-shaped bracket, and a locking pin that pivotally attaches a link located at an end of the chain into the groove of the H-shaped bracket (for example, , See Patent Document 1).

JP 2000-46123 A

  In recent years, there is a demand for downsizing each of a plurality of links constituting a chain.

  However, if each of the plurality of links in Patent Document 1 is miniaturized, the wire diameter of the link is reduced, and the inner surface width of the link (chain) (specifically, the distance between two parallel portions parallel to each other in the link). ) Becomes narrower (shorter). Then, since the locking pin needs to be inserted into the chain, it is necessary to set the outer diameter to be equal to or smaller than the inner surface width of the chain. If it does so, the mechanical strength of a locking pin will fall. On the other hand, the chain is long and heavy in the first place even if a plurality of links are reduced in size, the locking pin is damaged due to the weight of the chain, and as a result, the metal fitting cannot reliably connect the chain. There is a bug.

  The present invention provides a metal fitting to which such a link chain is securely coupled while ensuring miniaturization of the link chain, and a chain sling provided with them.

  The present invention (1) is a chain sling including a link chain including a first link, a second link coupled to the first link, and a metal fitting to which the link chain is coupled. A first receiving recess that receives the first link, and an insertion recess that is continuous with the first receiving recess and into which the second link is inserted. The first receiving recess is a depth of the first receiving recess. The first link is received so that the parallel portions of the first link are aligned in a direction perpendicular to the vertical direction, and the insertion recess has the longitudinal direction of the first link received in the first receiving recess. So that the insertion of the second link that intersects the first link when projected in the direction is allowed, and the insertion of the first link is restricted, so that it is wider than the wire diameter of the second link, And the first re- A chain that is narrower than the outer surface width of the groove, and wherein the first receiving recess includes an opening that is continuous with the insertion recess and a locking portion that locks the first link at an edge of the opening. Includes sling.

  In this chain sling, the insertion recess is wider than the wire diameter of the second link so that the insertion of the second link is allowed and the insertion of the first link is restricted, and the outer surface width of the first link. The first receiving recess is narrower and includes an opening that is continuous with the insertion recess and a locking portion that locks the first link at the edge of the opening. Therefore, the first link is received in the first receiving recess so that the parallel portions thereof are aligned, and the insertion in the insertion recess is restricted, while at the edge of the opening continuous to the insertion recess, the locking portion Locked.

  On the other hand, the second link is allowed to be inserted through the insertion recess.

  Therefore, the link chain is securely coupled to the metal fitting by locking the first link to the locking portion while receiving the first link and the second link in the opening and the insertion recess.

  Therefore, even if the first link is small, the locking pin is not inserted into the small first link as in Patent Document 1, but can be locked by the locking portion.

  As a result, it is possible to reliably connect the link chain including the first link with the metal fitting while reducing the size of the first link.

  This invention (2) is provided with the 1st control part which controls the movement of the said depth direction of the said 1st link received in the said 1st receiving recessed part, and the metal fitting is described in (1). Includes chain sling.

  In this chain sling, since the movement of the first link in the depth direction can be restricted by the first restricting portion, the first link is securely coupled by the metal fitting.

  In the present invention (3), the link chain includes a third link connected to the second link, and the metal fitting includes a second receiving recess that is continuous with the insertion recess and receives the third link, The second receiving recess receives the third link so that parallel portions of the third link are aligned in a direction orthogonal to the depth direction of the second receiving recess. (1) Or the chain sling as described in (2) is included.

  In this chain sling, the third link is received by the second receiving recess. Therefore, the link chain is more reliably coupled by the metal fitting.

  This invention (4) is provided with the 2nd control part which controls the movement of the said 3rd link of the said 3rd link currently received by the said 2nd receiving recessed part in the said depth direction, (3). Includes chain sling.

  In this chain sling, the movement of the third link in the depth direction can be restricted by the second restricting portion.

  This invention (5) contains the chain sling as described in any one of (1)-(4) whose wire diameter of the said link chain is less than 5 mm.

  In this chain sling, since the link chain has a wire diameter of less than 5 mm, the link chain link can be reduced in size.

  The present invention (6) is a chain sling metal fitting to which a link chain comprising a first link and a second link connected to the first link is coupled, wherein the metal fitting attaches the first link. A first receiving recess for receiving, and an insertion recess that is continuous with the first receiving recess and through which the second link is inserted, wherein the first receiving recess is orthogonal to the depth direction of the first receiving recess. The width in the direction orthogonal to the depth direction is equal to or greater than the outer surface width of the first link so that the first link can be received so that the parallel portions of the first link are aligned in the direction of The insertion recess is allowed to pass through the second link that intersects the first link when the first link received in the first receiving recess is projected in the longitudinal direction; and The insertion of the first link The first receiving recess is wider than the wire diameter of the second link and narrower than the outer surface width of the first link, and the first receiving recess includes an opening continuous with the insertion recess, and the opening. A chain sling fitting including a locking portion for locking the first link at the edge of the first link.

  In this chain sling fitting, the insertion recess is wider than the wire diameter of the second link so that insertion of the second link is allowed and insertion of the first link is restricted, and The first receiving recess is narrower than the outer surface width, and includes an opening that is continuous with the insertion recess and a locking portion that locks the first link at the edge of the opening. Therefore, the first link is received in the first receiving recess so that the parallel portions thereof are aligned, and the insertion in the insertion recess is restricted, while at the edge of the opening continuous to the insertion recess, the locking portion Locked.

  On the other hand, the second link is allowed to be inserted through the insertion recess.

  Therefore, the link chain is securely coupled to the metal fitting by locking the first link to the locking portion while receiving the first link and the second link in the opening and the insertion recess.

  Therefore, even if the first link is small, the locking pin is not inserted into the small first link as in Patent Document 1, but can be locked by the locking portion.

  As a result, even if the first link is small, the link chain including the first link can be securely coupled by the metal fitting.

  According to the chain sling and the metal fitting thereof of the present invention, the link chain including the first link can be reliably coupled by the metal fitting while reducing the size of the first link.

1A to 1C show an embodiment of a chain sling according to the present invention. FIG. 1A is a front view, FIG. 1B is a rear view, and FIG. 1C is a right side view. 2 shows an enlarged perspective view of the upper metal fitting shown in FIG. 1 as viewed from one side in the front vertical direction. FIG. 3 is a front view of the upper metal fitting and the link chain shown in FIG. In FIG. 3, a plurality of pins are omitted in order to clearly show the relative positions of the upper metal fitting and the link chain. 4A and 4B are side cross-sectional views of the upper metal fitting and the link chain shown in FIG. 3, and FIG. 4A is a cross-sectional view taken along line AA in FIG. 3, and FIG. 4B is a line BB in FIG. FIG. 5C to 5F are plan sectional views of the upper metal fitting and the link chain shown in FIG. 3. FIG. 5C is a sectional view taken along the line CC in FIG. 3, and FIG. 5D is a line DD in FIG. 5E is a cross-sectional view taken along the line EE of FIG. 3, and FIG. 5F is a cross-sectional view taken along the line FF of FIG. FIG. 6 is an enlarged perspective view of the upper metal fitting shown in FIG. 2 in which the link chain is not yet joined. 7A and 7B are the upper metal fittings shown in FIG. 6, FIG. 7A shows a front view, and FIG. 7B shows a right side view. 8A and 8B are the upper metal fittings shown in FIG. 6, FIG. 8A shows a rear view, and FIG. 8B shows a left side view. 9A and 9B are the upper metal fittings shown in FIG. 6, FIG. 9A is a plan view, and FIG. 9B is a bottom view. 10A and 10B are lower metal fittings in the chain sling shown in FIG. 1. FIG. 10A is a front view, and FIG. 10B is a right side view. 11A and 11B are lower metal fittings in the chain sling shown in FIG. 1, FIG. 11A is a rear view, and FIG. 11B is a left side view. 12A and 12B are lower metal fittings in the chain sling shown in FIG. 1, and FIG. 12A is a plan view and FIG. 12B is a bottom view. FIG. 13 shows a front view of a modification of the chain sling shown in FIG. 14A and 14B are upper brackets of the chain sling shown in FIG. 13, and FIG. 14A shows a front view and FIG. 14B shows a right side view. 15A and 15B are upper metal fittings of the chain sling shown in FIG. 13, FIG. 15A shows a rear view, and FIG. 15B shows a left side view. 16A and 16B are upper metal fittings of the chain sling shown in FIG. 13, FIG. 16A is a plan view, and FIG. 16B is a bottom view.

<One Embodiment>
As shown in FIGS. 1A to 1C, the chain sling 1 includes a link chain 2 and an upper metal fitting 3 and a lower metal fitting 4 as an example of a metal fitting to which the link chain 2 is coupled.

  The link chain 2 includes a plurality of links 5. Such a link chain 2 is not particularly limited, and is defined by, for example, JIS B 8812 (2004), JIS B 8816 (2004), and the like. Specifically, in the link chain 2, adjacent links 5 are connected to each other. The link chain 2 includes one side first link 11, one side second link 12, one side third link 13, and one side fourth link 14 located at one end portion in order toward the other side in the vertical direction. Further, the link chain 2 has the other side first link 15, the other side second link 16, the other side third link 17, and the other side fourth link 18 positioned at the other side end portion in order in the vertical direction one side. Prepare. Further, the link chain 2 includes an infinite number of links 5 between the first side fourth link 14 and the other side fourth link 18. In the link chain 2, the one side first link 11, the one side second link 12, the one side third link 13, the one side fourth link 14, the other side fourth link 18, the other side third link 17, the other side first link. The two links 16 and the first link 15 on the other side are arranged in order from one side to the other side.

  In the link chain 2, the two links 5 adjacent to each other (close to each other) are coupled to the upper metal fitting 3 and the lower metal fitting 4 (so-called link chain 2 is in tension), and the vertical direction (tension direction). Are orthogonal to each other. Each of the plurality of links 5 includes two parallel portions 47, two longitudinal ends of the two parallel portions 47, and two connecting portions 48 that connect the other longitudinal ends. When the link chain 2 is in tension, the adjacent connecting portions 48 come into contact with each other on the inner surface.

  As shown in FIG. 2 and FIG. 3, the wire diameter d of the link chain 2 is, for example, less than 13 mm, preferably less than 5 mm, and 1 mm or more. If the wire diameter d of the link chain 2 is less than the above upper limit, the link chain can be reduced in size. Moreover, the inner surface width a of the link chain 2 is, for example, less than 19.5 mm, preferably less than 7.5 mm, and not less than 1.25 mm. The outer surface width b of the link chain 2 is a value obtained by adding the double value of the wire diameter d and the inner surface width a, for example, less than 45.5 mm, for example, 3.25 mm or more.

  The upper metal fitting 3 is a locking metal fitting for locking the first link 11 on one side while receiving the first link 11, the second link 12 and the third link 13. The upper metal fitting 3 has a substantially rectangular plate shape that has a predetermined thickness, extends long in the vertical direction, and extends short in the horizontal direction (direction perpendicular to the thickness direction and the vertical direction). The upper metal fitting 3 is, for example, a master link, and includes a link portion 6 and an accommodation locking portion 7. As shown in FIGS. 1A and 1C, the upper metal fitting 3 further includes a plurality of pins 49.

  As shown in FIG. 3, the link part 6 is located in the vertical direction one side (upper side in FIG. 1A-FIG. 1C) part in the upper metal fitting 3. FIG. The link part 6 has an annular shape when viewed from the front. Specifically, the link part 6 has the through-hole 22 which penetrates the thickness direction. The through hole 22 is a long long hole along the vertical direction.

  The housing locking part 7 is located on the other side in the longitudinal direction with respect to the link part 6. The housing locking portion 7 is continuous with the other longitudinal end portion of the link portion 6. As shown in FIG. 2 and FIG. 3, the housing locking portion 7 has a predetermined flat, substantially flat box (or substantially flat plate) shape having a predetermined thickness and extending long in the vertical direction and short in the horizontal direction. Have. The accommodation locking portion 7 includes an upper wall 8, a rear wall 9, and two lateral walls 10 in succession.

  The upper wall 8 is continuous with the other longitudinal end of the link portion 6 and is located at the one end in the longitudinal direction of the housing locking portion 7. The upper wall 8 has a substantially flat plate shape extending in the lateral direction. Note that the lower surface of the central portion in the lateral direction of the front portion of the upper wall 8 has a substantially semicircular arc shape in plan view corresponding to one connecting portion 48 of the first side link 11 described later. The center of the arc on the lower surface of the upper wall 8 is located on the other side in the longitudinal direction with respect to the lower surface.

  The rear wall 9 has a substantially plate shape extending from the rear side (one side in the thickness direction) of the upper wall 8 toward the other side in the vertical direction (lower side in FIG. 3). As shown in FIG. 4A, the upper wall 8 and the rear wall 9 thereby have a substantially L shape in sectional view.

  As shown in FIGS. 4A and 7A, the rear wall 9 has a first notch 27 and a second notch 28.

  The first cutout portion 27 has a shape in which a front side portion (one side portion in the thickness direction) of the rear wall 9 is cut from the other side in the vertical direction to the middle on the one side in the vertical direction (before the one end portion in the vertical direction). The first cutout portion 27 has a cross-sectional shape corresponding to the outer shape of one parallel portion 47 in the second link 12 and one connecting portion 48 continuous thereto. Specifically, the first cutout portion 27 has an arc portion 53 and a straight portion 54 continuously.

  As shown in FIG. 4A, the arc portion 53 has a 1/4 arc surface having a substantially arc-shaped side sectional view that is open toward the front side and the other side in the longitudinal direction when viewed in cross section. The rear portion of the one connecting portion 48 in the one-side second link 12 is fitted into the arc portion 53. Therefore, the circular arc part 53 becomes the 3rd control part 55 which controls that the one side 2nd link 12 moves to the vertical direction one side.

  The straight portion 54 has a substantially straight shape in front view extending from the other longitudinal end of the arc portion 53 toward the other longitudinal side. As shown in FIGS. 5D and 5E, the straight portion 54 has a 1/2 arc surface (semi-arc surface) that faces the front side and has a substantially 1/2 (semi-) arc shape in a plan view. One parallel portion 47 of the second link 12 on one side is fitted to the straight portion 54. Therefore, the straight part 54 becomes the 4th control part 56 which controls that the one side 2nd link 12 moves (rotates) to a horizontal direction.

  As shown in FIGS. 7A and 8A, the second cutout portion 28 has a shape that is cut out so as to penetrate through the other end portion in the longitudinal direction of the rear wall 9 in a substantially triangular shape in the thickness direction. 4A, the second cutout portion 28 allows rotation (turning) to the rear side of the one-side fourth link 14.

  As shown in FIGS. 5C to 7A, each of the two lateral walls 10 has a substantially plate shape extending from both lateral ends of the rear wall 9 toward the front side. The lateral wall 10 integrally includes an outer wall 20 and a protruding wall 21.

  The outer wall 20 is provided on each of the two lateral walls 10. Each of the two outer walls 20 is located on the laterally outer side of each of the two lateral walls 10. The two outer walls 20 are spaced apart from each other in the lateral direction. Each of the two outer walls 20 has a substantially flat plate shape that extends straight from both lateral ends of the front portion of the upper wall 8 to the other longitudinal side.

  As shown in FIGS. 6 and 7A, each of the two protruding walls 21 has a shape that protrudes in a substantially mountain shape from the center in the vertical direction of each of the two outer walls 20 and from the vicinity in the vertical direction toward the inner side in the horizontal direction. Have That is, each of the two protruding walls 21 is located on the inner side in the lateral direction of the two outer walls 20. Each of the two protruding walls 21 includes an insertion recess partition portion 36 and a first skirt portion 37 and a second skirt portion 38 that are located on both sides in the longitudinal direction of the insertion recess partition portion 36.

  The insertion recess partition portion 36 has a substantially rectangular box shape in front view that bulges from the center in the vertical direction of the outer wall 20 toward the inner side in the lateral direction (the direction in which the two insertion recess partition portions 36 are close to each other). Each of the two insertion recessed part partition parts 36 has an opposing surface which opposes a horizontal direction. The opposing surface of the insertion recessed part partitioning part 36 partitions the front side (thickness direction one side) of the insertion recessed part 32 mentioned later. The facing surface of the insertion recess partitioning portion 36 is located at the same position as both lateral edges of the first cutout portion 27 in a front view. That is, the distance L between the opposing surfaces of the two insertion recess partitioning portions 36 is the same length as the width of the first cutout portion 27.

  The first skirt 37 has a substantially right triangle shape in front view extending from one edge in the longitudinal direction of the insertion recess partitioning portion 36 toward one side in the longitudinal direction and the cross-sectional area gradually decreases toward the one side in the longitudinal direction. Have. The first skirt portion 37 is an example of a locking portion that connects the longitudinal other side edge of the inner surface of the longitudinal one side portion of the outer wall 20 and the longitudinal one side edge of the opposing surface of the insertion recess partitioning portion 36. As a first inner peripheral surface 59. The first inner peripheral surfaces 59 of the two first skirt portions 37 have a shape (substantially ¼ arc shape) corresponding to the outer shape of the halved portion of the connecting portions 48 of the plurality of links 5 in a front view.

  The second skirt 38 has a substantially right triangle shape in front view extending from the other edge in the longitudinal direction of the insertion recess partitioning part 36 toward the other side in the longitudinal direction and the cross-sectional area gradually decreases toward the other side in the longitudinal direction. Have. The second hem 38 is a second inner peripheral surface that connects the vertical one side edge of the inner surface of the vertical other side portion of the outer wall 20 and the vertical other side edge of the opposing surface of the insertion recess partition 36. 62. The second inner peripheral surfaces 62 of the two second skirt portions 38 have a shape (substantially ¼ arc shape) corresponding to the outer shape of the halved portion of the connecting portions 48 of the plurality of links 5 in a front view.

  Further, as shown in FIGS. 7B and 8B, each of the two lateral walls 10 has a first pin hole 24 and a second pin hole 25 that are spaced apart in the vertical direction.

  As shown in FIG. 5C, the two first pin holes 24 are located in front of the first link 11 on the one side when projected in the lateral direction. As shown in FIG. 5F, the two second pin holes 25 are located in front of the one-side third link 13 when projected in the lateral direction.

  As shown in FIGS. 2, 4A, and 4B, each of the plurality of pins 49 has a substantially cylindrical shape (specifically, a substantially C shape in cross-sectional view) having a slit 57 along the axial direction. The plurality of pins 49 include a first pin 51 as an example of a first restricting portion and a second pin 52 as an example of a second restricting portion.

  The first pin 51 has an outer diameter corresponding to the inner diameter of the two first pin holes 24. The first pin 51 is inserted into the two first pin holes 24 and is disposed on the front side of the first link 11 that will be described in detail later. When the first pin 51 is inserted into the first pin hole 24, the first pin 51 is radially outward based on a slight reduction in diameter so that the width of the slit 57 is narrowed or partially eliminated. The first pin hole 24 is fixed by the heading pressure.

  The second pin 52 has an outer diameter corresponding to the inner diameter of the two second pin holes 25. The second pin 52 is inserted into the two second pins 52 and is disposed on the front side of the one-side third link 13 described in detail later. When the second pin 52 is inserted into the second pin hole 25, the second pin 52 is radially outward based on a slight reduction in diameter so that the width of the slit 57 is narrowed or partially eliminated. It is fixed to the second pin hole 25 by the heading pressure.

  As shown in FIGS. 4A to 5F and FIG. 7A, in the housing locking portion 7, the upper wall 8, the two outer walls 20, the two first skirt portions 37, and the rear wall 9 are the upper wall 8, A first receiving recess 31 is formed which is recessed from the front surface of the outer wall 20 and the first skirt portion 37 toward the rear side. Further, the two insertion recess partitioning portions 36 and the first cutout portion 27 of the rear wall 9 are recessed from the front surface of the insertion recess partitioning portion 36 toward the rear side, and are also recessed from the front surface of the rear wall 9. Form. Further, the two second skirts 38, the two outer walls 20, and the rear wall 9 form a second receiving recess 33 that is recessed from the front surface of the outer wall 20 and the second skirt 38 toward the rear side.

  The first receiving recess 31 has a predetermined depth D1 and a predetermined lateral length W1. The insertion recess 32 has a predetermined depth D2 and a predetermined lateral length L. The second receiving recess 33 has a predetermined depth D3 and a predetermined lateral length W2.

  Further, in the first receiving recess 31, the lower surface of the central portion in the lateral direction of the upper wall 8, the inner surfaces of the two outer walls 20 on the one side in the vertical direction from the first skirt 37, and the first of the two first skirts 37. The inner peripheral surface 59 forms the first peripheral surface 34. The first peripheral surface 34 has a substantially C-shape in front view opened toward the other side in the longitudinal direction, and has a surface continuous in the circumferential direction. The first peripheral surface 34 is disposed (placed) on the front surface of one side portion in the vertical direction of the rear wall 9 in the first receiving recess 31 so that the two parallel portions 47 in the first link 11 are arranged in the horizontal direction. Sometimes, it has the same shape as the outer shape of the first link 11. The first peripheral surface 34 and the front surface of one longitudinal side portion of the rear wall 9 partition a first opening 26 as an example of an opening. The edge of the first opening 26 corresponds to the first skirt 37. The first opening 26 opens to the front side and communicates with an insertion recess 32 described below.

  The lateral length W1 of the first receiving recess 31 is equal to or larger than the outer surface width b of the first side first link 11 so that the first side link 11 can be received side by side with the two parallel portions 47 in the lateral direction. It is.

  In the first receiving recess 31, the front surface of the rear wall 9 has the rear end edge of the first link 11 on one side, the two parallel portions 47 arranged in the horizontal direction, and the two connecting portions 48 in the vertical direction. It has a surface on which it can be placed while being aligned, and specifically has a flat surface along the vertical and horizontal directions.

  In the insertion recess 32, the opposing surfaces of the two insertion recess partition portions 36 and the semicircular arc surface of the straight portion 54 in the first cutout portion 27 form an insertion peripheral surface 39 continuous in the thickness direction. The insertion peripheral surface 39 partitions the insertion recess 32. The insertion recess 32 is continuous with the first receiving recess 31. The insertion recess 32 communicates with the other side portion of the first opening 26 in the longitudinal direction.

  The width (lateral length) of the insertion recess 32 (distance between the opposing surfaces of the two insertion recess partition portions 36) L is larger than the wire diameter d of the one-side second link 12 and the one-side first link 11. It is narrower than the outer surface width b. Further, the depth D2 of the insertion recess 32 is deeper than the outer surface width b of the one-side second link 12.

  In the second receiving recess 33, the second inner peripheral surface 62 of the two second skirt portions 38 and the inner surface of the two outer walls 20 on the other side in the vertical direction from the second skirt portion 38 form the second peripheral surface 35. To do. The second peripheral surface 35 has a substantially U-shape in a front view opened toward the other side in the vertical direction (however, a U-shape in which one end in the vertical direction is missing). The second peripheral surface 35 is disposed (mounted) on the front surface of the other side portion in the vertical direction of the rear wall 9 in the second receiving recess 33 so that the two parallel portions 47 in the third link 13 are aligned in the horizontal direction when viewed from the front. The outer shape of the third link 13 is the same. The second peripheral surface 35 and the front surface of the other side portion in the longitudinal direction of the rear wall 9 partition the second opening 29. The second opening 29 communicates with the other side portion in the longitudinal direction of the insertion recess 32. As a result, the second opening 29 communicates with the first opening 26 via the insertion recess 32.

  The lateral length W2 of the second receiving recess 33 is equal to or greater than the outer surface width b of the one-side third link 13 so that the one-side third link 13 can be received side by side in the two parallel portions 47. It is.

  Further, in the second receiving recess 33, the front surface of the rear wall 9 has the rear end edge of the third link 13 on the one side, the two parallel portions 47 arranged in the horizontal direction, and the two connecting portions 48 in the vertical direction. It has a surface on which it can be placed while being aligned, and specifically has a flat surface along the vertical and horizontal directions.

  And the upper metal fitting 3 accommodates the one side first link 11, the one side second link 12 and the one side third link 13 of the link chain 2, and is further inserted into the first pin 51 and the second pin 52. Has been.

  The one side first link 11 is received in the first receiving recess 31 so that the two parallel portions 47 are arranged in the horizontal direction. Specifically, the first receiving recesses of the one side first links 11 are arranged such that the parallel portions 47 are arranged in the lateral direction and the rear end edges of the one side first links 11 are in contact with the front surface of the rear wall 9. 31 is fitted (accommodated). The outer surface of the one side first link 11 faces the first circumferential surface 34. In particular, the outer surface of the connecting portion 48 located on the other side in the longitudinal direction of the first link 11 on one side is locked by the first inner peripheral surface 59 of the first skirt portion 37. On the other hand, the outer surface of the connecting portion 48 located on one side in the longitudinal direction of the first link 11 on one side is locked by the lower surface of the upper wall 8. Further, the one-side first link 11 is sandwiched between the front surface of the rear wall 9 and the first pin 51 in the thickness direction.

  Since the first side link 11 is fitted in the first receiving recess 31 and is locked by the first inner peripheral surface 59 of the first skirt 37, the insertion into the insertion recess 32 is restricted.

  As shown in FIGS. 2 and 3, the one-side second link 12 is inserted through the insertion recess 32. That is, the insertion recess 32 allows the one-side second link 12 to be inserted. Specifically, as shown in FIG. 4A, the connecting portion 48 on one side in the longitudinal direction of the one side second link 12 and the connecting portion 48 on the other side in the longitudinal direction of the one side first link 11 are in contact ( That is, in the state where the one-side second link 12 and the one-side first link 11 are tensioned), the one-side second link 12 is inserted through the insertion recess 32. As shown in FIGS. 5D and 5E, the rear portion of the one-side second link 12 is fitted in the first cutout portion 27. On the other hand, the front portion of the one-side second link 12 is located between the opposing surfaces of the two insertion recess partitioning portions 36 (insertion recesses 32 partitioned by).

  As shown in FIGS. 3 and 5F, the one-side third link 13 is received in the second receiving recess 33 so that the two parallel portions 47 are arranged in the horizontal direction. Specifically, the one side third link 13 is arranged so that the two parallel parts 47 are arranged in the horizontal direction and the rear end edge of the one side third link 13 is in contact with the front surface of the rear wall 9. It fits in (accommodates) the receiving recess 33. The outer surface of the one side third link 13 faces the second peripheral surface 35. In particular, the connecting portion 48 located on one side in the longitudinal direction of the one side third link 13 is locked to the second inner peripheral surface 62 of the second skirt portion 38. That is, the movement of the one side third link 13 to the one side in the vertical direction is restricted by the second inner peripheral surface 62 of the second skirt 38. On the other hand, as shown in FIG. 1B, the connecting portion 48 located on the other side in the longitudinal direction of the one side third link 13 is exposed to the rear side from the longitudinal direction other side edge of the rear wall 9 (second notch portion 28). To do. The one-side third link 13 is sandwiched between the front surface of the rear wall 9 and the second pin 52 in the thickness direction.

  The one-side fourth link 14 is connected to the one-side third link 13, but is not fixed to the accommodation locking portion 7. Specifically, as shown by the phantom lines and arrows in FIG. 4A, rotation (rotation) in the front-rear direction is allowed.

  In order for the upper metal fitting 3 to accommodate the one side first link 11, the one side second link 12 and the one side third link 13, for example, the one side first link 11, the one side second link 12 and the one side first link A state in which the three links 13 are in tension (for example, the one side first link 11, the one side second link 12, and the one side third link 13 are arranged so that the one side first link 11 becomes the other end in the vertical direction. First, the one parallel portion 47 in the one-side second link 12 is inserted into the insertion recess 32. Next, the one side first link 11 and the one side third link 13 are accommodated (fitted) in the first receiving recess 31 and the second receiving recess 33, respectively, and the other parallel portion of the one side second link 12 is inserted. 47 is inserted into the insertion recess 32. Subsequently, the rear end edges of the first side first link 11 and the first side third link 13 are connected to the rear wall so that the two parallel portions 47 of the first side first link 11 and the first side third link 13 are aligned. 9 is brought into contact with the front surface.

  Thereafter, the first pin 51 is inserted from one first pin hole 24, and subsequently passed through the front side of the one side first link 11, and then inserted into the other first pin hole 24. At the same time, the second pin 52 is inserted from the one second pin hole 25, and subsequently passed through the front side of the one side third link 13, and then inserted into the other second pin hole 25.

  In the link chain 2 and the upper metal fitting 3, the one-side first link 11 is locked to the first inner peripheral surface 59 of the first skirt 37. Therefore, the movement of the one side first link 11 to the other side in the vertical direction is restricted.

  The one side third link 13 is locked to the second inner peripheral surface 62 of the second skirt 38. Therefore, the movement of the one side third link 13 to one side in the vertical direction is restricted.

  In addition, since the one-side second link 12 is in tension with respect to the one-side first link 11 and the one-side third link 13, movement in the vertical direction is restricted.

  Further, the first pin 51 and the second pin 52 restrict the movement of the one-side first link 11 and the one-side third link 13 to the front side. In addition, since the one-side second link 12 is in tension with respect to the one-side first link 11 and the one-side third link 13, the movement on the front side is also restricted.

  As shown in FIGS. 1A to 1C, the lower metal fitting 4 is, for example, a hook, and closes between a flange portion 40 having a substantially C shape in front view and a free end portion and a base end portion of the flange portion 40. It is provided with a closing plate 41 that can be provided and an accommodation locking portion 7.

  The housing locking portion 7 is located at one side portion in the vertical direction of the lower metal fitting 4. The housing locking portion 7 is continuous with the proximal end portion of the flange portion 40. The housing locking portion 7 has the same configuration in the upper metal fitting 3 and houses the other side first link 15, the other side second link 16 and the other side third link 17. The upper metal fitting 3 is the same as the aspect which accommodates the one side first link 11, the one side second link 12 and the one side third link 13.

  Thereby, in the chain sling 1, both end portions of the link chain 2 are coupled to the upper metal fitting 3 and the lower metal fitting 4.

  And in this chain sling 1, the insertion recessed part 32 is the line | wire of the one side 2nd link 12 so that insertion of the 1st side 2nd link 12 is permitted, and insertion of the 1st side 1st link 11 is controlled. The first receiving recess 31 is wider than the diameter d and narrower than the outer surface width b of the first link 11 on the one side, and the first receiving recess 31 is continuous with the insertion recess 32 and on one side of the first skirt 37. And a first inner peripheral surface 59 for locking the first link 11. For this reason, the first first link 11 is received in the first receiving recess 31 so that the parallel portions 47 thereof are aligned, and the insertion in the insertion recess 32 is restricted, while the first receiving recess 31 continuing to the insertion recess 32. The first hem 37 is locked by the first inner peripheral surface 59.

  On the other hand, the one-side second link 12 is allowed to be inserted through the insertion recess 32.

  Therefore, the one side first link 11 is locked to the first inner peripheral surface 59 while receiving the one side first link 11 and the one side second link 12 in the first opening 26 and the insertion recess 32. Thus, the link chain 2 is securely coupled to the upper metal fitting 3.

  Therefore, even if the one side first link 11 is small, it can be locked by the first inner peripheral surface 59 of the first skirt portion 37.

  As a result, the link chain 2 including the one side first link 11 can be reliably coupled by the upper metal fitting 3 while downsizing the one side first link 11.

  The lower metal fitting 4, the other side first link 15, the other side second link 16, and the other side third link 17 are the upper metal fitting 3, the one side first link 11, and the one side second link 12. And the same operation effect as one side 3rd link 13 can be produced. This also applies to the following effects.

  Further, in this chain sling 1, the movement in the depth direction (thickness direction) of the one side first link 11 can be restricted by the first pin 51, so that the one side first link 11 is securely coupled by the upper metal fitting 3. Is done.

  Furthermore, in this chain sling 1, the one-side third link 13 is received by the second receiving recess 33. Therefore, the chain sling 1 is more reliably coupled by the upper metal fitting 3.

  Furthermore, in the chain sling 1, movement of the one-side third link 13 in the depth direction (thickness direction) can be restricted by the second pin 52.

  In the chain sling 1, if the wire diameter d of the link chain is less than 5 mm, the link chain link can be reduced in size.

  The above-described chain sling 1 is used for, for example, a hanging tool, a ball rack, and the like, and in particular, is used in various fields as a chain sling 1 including a miniaturized link chain 2.

  The chain sling 1 includes a link chain 2 and an upper metal fitting 3 and a lower metal fitting 4. For example, only the upper metal fitting 3 or only the lower metal fitting 4 is provided as a metal fitting (component) for the chain sling 1. You can also In this case, the upper metal fitting 3 for the chain sling 1 or the lower metal fitting 4 for the chain sling 1 is not yet coupled to the link chain 2 and is an industrially usable metal fitting, It can be distributed alone.

  In the upper metal fitting 3 of the chain sling 1, the insertion recess 32 allows the one-side second link 12 to be inserted and restricts the one-side first link 11 from being inserted. The first receiving recess 31 includes a first opening 26 continuous with the insertion recess 32, and a first opening 26 that is wider than the outer diameter b of the first link 11. And a first skirt portion 37 for locking the one-side first link 11 to the edge portion. Therefore, the first link 11 on one side is received in the first receiving recess 31 so that the parallel portions 47 thereof are aligned, and insertion in the insertion recess 32 is restricted, while the first opening 26 continuous to the insertion recess 32. The first hem 37 is locked by the first inner peripheral surface 59.

  On the other hand, the one-side second link 12 is allowed to be inserted through the insertion recess 32.

  Therefore, the one side first link 11 can be locked to the first inner peripheral surface 59 while receiving the one side first link 11 and the one side second link 12 in the first opening 26 and the insertion recess 32. Thus, the chain sling 1 is securely coupled to the upper metal fitting 3.

  Therefore, even if the one side first link 11 is small, the locking pin is not inserted into the small one side first link 11 as in Patent Document 1, but by the first inner peripheral surface 59. Can be locked.

  As a result, even if the one-side first link 11 is small, the link chain 2 including the one-side first link 11 can be reliably coupled by the upper metal fitting 3.

  The lower metal fitting 4 has the same effects as the upper metal fitting 3 described above.

<Modification>
In the following modifications, members and processes similar to those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. Moreover, each modification can be combined suitably. Furthermore, each modification can produce the same effects as those of the embodiment, unless otherwise specified.

  In one embodiment, each of the upper metal fitting 3 and the lower metal fitting 4 includes the first opening 26 and the insertion recess 32. However, although not shown, only one of the upper metal fitting 3 and the lower metal fitting 4 can include the first opening 26 and the insertion recess 32.

  In one embodiment, the upper metal fitting 3 is a master link and the lower metal fitting 4 is a hook. However, for example, although not shown, both the upper metal fitting 3 and the lower metal fitting 4 can be used as master links or hooks.

  In one embodiment, as shown in FIG. 1A, each of the first opening portion 26, the first cutout portion 27, and the second opening portion 29 is provided in the accommodation locking portion 7. However, the number is not particularly limited. Each of the first opening 26, the first notch 27, and the second opening 29 may be, for example, a plurality, specifically, two as shown in FIGS. 13 to 16B. Also good.

  The chain sling 1 includes one upper metal fitting 3, two link chains 2, and two lower metal fittings 4.

  In the accommodation locking portion 7 of the upper metal fitting 3, the two first openings 26 are arranged adjacent to each other at an interval in the lateral direction.

  The first link 11 on one side of each of the two link chains 2 is received in each of the two first openings 26. The second link 12 on one side of each of the two link chains 2 passes through each of the two insertion recesses 32. Further, the respective one side third links 13 of the two link chains 2 are received in the two second openings 29.

  In this chain sling 1, two lower fittings 4 are connected to one upper fitting 3 via two link chains 2.

  In one embodiment, the first pin 51 and / or the second pin 52 as an example of the first restricting portion and the second restricting portion are moved to the front side of the one side first link 11 and / or the one side third link 13. Although not illustrated, for example, a lid having a plate shape extending in the vertical direction and the horizontal direction can be provided so as to cover the first opening 26 and / or the second opening 29. The lid may be separate from the housing locking portion 7 or may be integral.

  In one embodiment, the protruding wall 21 includes a first skirt portion 37, an insertion recess partition portion 36, and a second skirt portion 38. However, the protruding wall 21 only needs to include the first skirt portion 37 having the first inner peripheral surface 59. Although not shown, for example, the protruding wall 21 not including the second skirt portion 38, and the second The protruding wall 21 that does not include the skirt 38 and the insertion recess partition 36 may be used.

DESCRIPTION OF SYMBOLS 1 Chain sling 2 Link chain 3 Upper metal fitting 4 Lower metal fitting 11 One side 1st link 12 One side 2nd link 13 One side 3rd link 26 1st opening part 29 2nd opening part 31 1st receiving recessed part 32 Insertion recessed part 33 1st 2 receiving recess 38 second skirt 47 parallel part 51 first pin 52 second pin 62 second inner peripheral surface b outer surface width d wire diameter

Claims (6)

A chain sling comprising a first link, a link chain comprising a second link coupled to the first link, and a metal fitting to which the link chain is coupled,
The metal fitting includes a first receiving recess that receives the first link, and an insertion recess that is continuous with the first receiving recess and into which the second link is inserted.
The first receiving recess receives the first link such that parallel portions of the first link are aligned in a direction perpendicular to the depth direction of the first receiving recess,
The insertion recess allows insertion of the second link that intersects the first link when the first link received in the first receiving recess is projected in the longitudinal direction thereof, and In order to restrict insertion of the first link, it is wider than the wire diameter of the second link and narrower than the outer surface width of the first link,
The chain sling, wherein the first receiving recess includes an opening that is continuous with the insertion recess, and a locking portion that locks the first link at an edge of the opening.   2. The chain sling according to claim 1, wherein the metal fitting includes a first restricting portion that restricts movement of the first link received in the first receiving recess in the depth direction. . The link chain includes a third link connected to the second link;
The metal fitting includes a second receiving recess that is continuous with the insertion recess and receives the third link,
The said 2nd receiving recessed part receives the said 3rd link so that the parallel part of the said 3rd link may be located in a direction orthogonal to the depth direction of the said 2nd receiving recessed part. Or the chain sling of 2.   4. The chain sling according to claim 3, wherein the metal fitting includes a second restricting portion that restricts the movement of the third link received in the second receiving recess in the depth direction. 5. .   The chain sling according to any one of claims 1 to 4, wherein a wire diameter of the link chain is less than 5 mm. A chain sling fitting to which a link chain comprising a first link and a second link coupled to the first link is coupled,
The metal fitting includes a first receiving recess that receives the first link, and an insertion recess that is continuous with the first receiving recess and into which the second link is inserted.
The depth of the first receiving recess is such that the first link can be received such that parallel portions of the first link are aligned in a direction perpendicular to the depth direction of the first receiving recess. The width in the direction orthogonal to the direction is equal to or greater than the outer surface width of the first link;
The insertion recess allows insertion of the second link that intersects the first link when the first link received in the first receiving recess is projected in the longitudinal direction thereof, and In order to restrict insertion of the first link, it is wider than the wire diameter of the second link and narrower than the outer surface width of the first link,
The chain sling bracket, wherein the first receiving recess includes an opening continuous with the insertion recess, and a locking portion that locks the first link at an edge of the opening. .

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