Connector for safety device connection

Abstract

This invention prevents unintentional disconnection of the connection caused by a safety device connector. The safety device connector of one embodiment includes: a frame formed in an open curve with its ends facing each other, having an opening for inserting a safety device; and a gate provided to block the opening and supported by one end of the frame, which closes the opening when it abuts against the other end, and opens the opening when the abutment against the other end is released. The frame has a ridge on the side opposite to the opening. Among the frame portions continuous to each end of the ridge, a first portion continuous to the end of the frame on the gate support side is formed in a straight line or has a small curvature to allow suspension of a strap. Among the frame portions, a second portion located on the opposite side of the first portion, continuous to the end of the ridge on the opening side, has a large curvature to suppress movement of the shaft member.

Description

Technical Field

[0001] The invention relates to a connector for connecting a safety device. Prior Art

[0002] Safety device connectors are connecting components, similar to carabiners, with a portion that can be opened and closed, allowing other components to be suspended. Examples include carabiners. In one example, these connectors are used as the connecting portion of lifelines used in aerial work. Other examples include ropes used to hang mountaineering equipment (such as climbing ropes) or for dock loading and unloading operations.

[0003] As mentioned above, connectors are used in various applications. Connectors are configured to suit their intended use.

[0004] For example, a connector typically includes a frame with a C-shaped opening. A gate (opening and closing member) base is connected to one end of the connector frame's opening. The gate pivots about the base. The gate is designed to switch between a closed and an open state by pivoting. However, depending on the item connected to the connector, some require easy removal, while others require it not. Thus, in conventional designs that change the connector's opening and closing state by changing the position of the gate's tip relative to the frame, an elastic body is provided on the gate. The elastic body applies a force toward the inside of the frame. When a user opens the gate, they must resist the force applied by the elastic body to rotate the gate. Among such connectors, a connector with a guide portion has been proposed (see Patent Document 1 below). The guide portion is a portion of the gate that is extended by bending toward the inside of the frame. In other words, the gate is extended by a predetermined length compared to conventional designs. The user can open the gate by hooking a portion of the connected item onto the extended portion of the gate's tip. That is, the user can open the gate with one action. The connector prioritizes ease of opening over maintaining the gate's closed state. [Prior art literature] [Patent Document]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 10-220456 Summary of the Invention

[0006] [Problems to be solved by the invention] Connectors used to connect safety devices must prevent the connection from being accidentally released. Simply providing a locking mechanism for the rotation of a brake may not be sufficient. For example, connectors may be used to connect a lifeline to a body restraint. Examples include connecting a lanyard to a full harness, a lifeline to a life harness, or a climbing rope to a climbing harness. Accidental release of these connections can lead to accidents.

[0007] Both the lifeline-side connection and the body restraint-side connection are subject to relative movement due to the movement of the installer or other various reasons. The connector is sometimes stretched on one side by the lifeline and on the other side by the body restraint, so tensile strength is required to prevent damage. Furthermore, the connector structure has different tensile strength and durability depending on the direction of stretching. Therefore, if a tensile load is applied in a direction where it is difficult to ensure the strength of the connector, there is a risk of damage to the connector itself. Furthermore, there are cases where the lifeline-side connection or the body restraint-side connection is a flat fiber member or strip. In this case, there is also a risk that the widthwise ends of the connection may fray or break due to friction or the like. In other words, there is a risk that the connection may be lost if the connector's connected object is damaged, even if the connector itself is not damaged.

[0008] The present invention is made in view of the above-mentioned problems, and its object is to prevent the connection state of a connector for connection with a safety device from being accidentally released.

[0009] [Methods to solve the problem] The connector for connecting a safety device in an embodiment includes: a frame formed into an open curved shape with ends facing each other, having an opening between the ends for inserting a connecting portion of the safety device; and a gate arranged in a manner to block the opening and supported by one end of the frame, so that when it abuts with the other end, the opening is closed, and when the abutment with the other end is released, the opening is opened. The frame has a spine on the side opposite to the opening. Among the frame parts continuous with the ends of the spine, the first part continuous with the end of the frame on the gate support side is formed into a straight line or with a small curvature so that the strip can be hung. In each frame portion, a second portion located opposite to the first portion and continuous with the end portion on the opening side of the ridge is formed to have a large curvature to suppress movement of the annular member including the shaft member. In addition, it may also include a protrusion, which protrudes at least toward the inner side of the frame, thereby reducing the area between the opening side and the ridge side opposite to the opening. When one end side of the frame is set to the bottom and the other end side of the frame is set to the top, the protrusion is arranged on the bottom side of the ridge and is formed integrally with the frame. In addition, the gate can also be constructed in the following manner: it is rotatably supported at one end of the frame, and when the one end is rotated as a central closed state, the contact with the other end is released and it becomes an open state. In addition, the protrusion can be formed in a manner that protrudes not only toward the inner side of the frame but also toward the side. In addition, the inclination angle of the lower side of the inclined surface connecting the inner protruding end and the base end of the protrusion can also be 50 degrees or more. In addition, the inclination angle of the upper side of the inclined surface connecting the inner protruding end and the base end of the protrusion may be 40 degrees or less. In addition, it can also be configured as follows: when the gate is rotated and farthest away from one end of the frame, the extension direction of the gate is inclined by more than 10° relative to the first direction corresponding to the direction of the ridge of the frame and the second direction connecting the one end and the other end. A connector for connecting a safety device in another embodiment includes: a frame formed into an open curved shape with ends facing each other, having an opening between the ends for inserting a connecting portion of the safety device; a gate arranged to block the opening and supported by one end of the frame, which closes the opening when in contact with the other end and opens the opening when the contact with the other end is released. The frame has a ridge on the side opposite to the opening, and has a first part that is continuous with the end of the gate support part side of the frame among each frame part continuous with each end of the ridge, and further has a second part that connects the side of the ridge opposite to the first part to the convex part (nose) of the part that abuts the front end of the gate. When the gate rotates and its front end is farthest from the one end of the frame, when viewed on the same plane, the first direction from the ridge toward the gate side and the second direction connecting the one end and the other end are inclined by more than 10 degrees relative to the plane. In addition, the first part is formed into a straight line or has a small curvature so that the strip can be suspended. Among each frame part, the second part is located on the opposite side of the first part and can also be formed with a large curvature to suppress the movement of the annular member including the shaft member. In addition, it may also include a protrusion, which protrudes at least toward the inner side of the frame, thereby reducing the area between the opening side and the ridge side opposite to the opening. When one end side of the frame is set to the bottom and the other end side of the frame is set to the top, the protrusion is arranged on the bottom side of the ridge or near one end, and is formed integrally with the frame.

[0010] [Effects of the Invention] According to the embodiment, the lower side of the frame, located near the gate support portion, is formed into a straight shape or with a shallow curvature to allow the strip to be suspended. On the opposite side, the curvature is formed into a large shape to suppress movement of the annular member including the shaft member. This prevents deterioration of the strip due to friction and other factors on the lower side, and suppresses movement of the annular member suspended on the upper side, thereby preventing tensile loads from being applied in directions that could easily damage the connector. Consequently, the safety device connector can be prevented from being unintentionally disconnected. Simple diagram description

[0011] FIG1 is a schematic front view showing a safety device connecting connector according to a first embodiment. FIG. 2 is a schematic rear view showing the safety device connecting connector according to the first embodiment. FIG. 3 is a schematic right side view showing the safety device connecting connector according to the first embodiment. FIG. 4 is a schematic left side view of the safety device connecting connector according to the first embodiment. FIG. 5 is a schematic plan view showing the safety device coupling connector according to the first embodiment. FIG6 is a schematic bottom view showing the safety device coupling connector according to the first embodiment. FIG. 7 is a schematic perspective view showing an example of the safety device connecting connector according to the first embodiment. 8 is a schematic front view of the safety device connecting connector showing the open state and the closed state of the safety device connecting connector according to the first embodiment. 9 is a schematic rear view of the safety device connecting connector showing the open state and the closed state of the safety device connecting connector according to the first embodiment. FIG. 10 is a schematic diagram showing a usage state of the safety device connecting connector according to the first embodiment. FIG. 11 is a schematic front view showing a safety device connecting connector according to a modified example of the first embodiment. FIG. 12 is a schematic rear view of a safety device connecting connector showing a modified example of the first embodiment. FIG. 13 is a schematic perspective view showing an example of a safety device connecting connector according to a modified example of the first embodiment. 14 is a schematic front view of the safety device connecting connector showing an open state and a closed state of the safety device connecting connector according to a modification of the first embodiment. 15A is a schematic rear view of the safety device connecting connector showing an open state and a closed state of the safety device connecting connector according to a modification of the first embodiment. 15B is a schematic diagram showing a usage state of the safety device connecting connector according to a modification of the first embodiment. FIG. 16 is a schematic front view showing a safety device connecting connector according to a second embodiment. FIG. 17 is a schematic rear view showing a safety device connecting connector according to a second embodiment. FIG. 18 is a schematic right side view showing the safety device connecting connector according to the second embodiment. FIG. 19 is a schematic left side view showing a safety device connecting connector according to a second embodiment. FIG. 20 is a schematic plan view showing a safety device connecting connector according to a second embodiment. FIG. 21 is a schematic bottom view showing a safety device connecting connector according to a second embodiment. FIG. 22 is a schematic perspective view showing an engaged state of the safety device connecting connector according to the second embodiment. 23 is a schematic front view of the safety device connecting connector showing the open state and the closed state of the safety device connecting connector according to the second embodiment. 24 is a schematic rear view of the safety device connecting connector showing the open state and the closed state of the safety device connecting connector according to the second embodiment. 25 is a schematic right side view showing the safety device connecting connector in the open state and the closed state according to the second embodiment. 26 is a schematic left side view of the safety device connecting connector showing the open state and the closed state of the safety device connecting connector according to the second embodiment. 27 is a schematic plan view showing the safety device connecting connector in the open state and the closed state according to the second embodiment. 28 is a schematic bottom view showing the safety device connecting connector in the open state and the closed state according to the second embodiment. 29 is a schematic perspective view showing the safety device connecting connector in the open state and the closed state according to the second embodiment. FIG30 is a schematic perspective view showing an example of a safety device connecting connector according to a third embodiment. FIG31 is a schematic front view showing a safety device connecting connector according to a fourth embodiment. FIG. 32 is a schematic rear view showing a safety device connecting connector according to a fourth embodiment. FIG33 is a schematic right side view showing a safety device connecting connector according to a fourth embodiment. FIG. 34 is a schematic left side view showing a safety device connecting connector according to a fourth embodiment. FIG35 is a schematic plan view showing a safety device connecting connector according to a fourth embodiment. FIG. 36 is a schematic bottom view showing a safety device connecting connector according to a fourth embodiment. FIG. 37 is a schematic perspective view showing a safety device connecting connector according to a fifth embodiment. FIG38 is a schematic front view showing a safety device connecting connector according to a fifth embodiment. FIG39 is a schematic rear view showing a safety device connecting connector according to a fifth embodiment. FIG. 40 is a schematic right side view showing a safety device connecting connector according to a fifth embodiment. FIG. 41 is a schematic left side view showing a safety device connecting connector according to a fifth embodiment. FIG. 42 is a schematic plan view showing a safety device connecting connector according to a fifth embodiment. FIG. 43 is a schematic bottom view showing a safety device connecting connector according to a fifth embodiment. 44 is a schematic front view of the safety device connecting connector showing the open state and the closed state of the safety device connecting connector according to the fifth embodiment. 45 is a schematic perspective view of the safety device connecting connector showing an open state and a closed state of the safety device connecting connector according to the fifth embodiment. Implementation Method

[0012] 1 to 45, the safety device connecting connector according to the first to fifth embodiments will be described.

[0013] [First embodiment] 1 to 10, the overall structure of the safety device connecting connector 100 of the first embodiment will be described. Figures 1 to 7 show the front, back, right side, left side, top surface, bottom surface, and a schematic three-dimensional view of the safety device connecting connector 100 of the first embodiment.

[0014] Furthermore, a gap is formed in the frame (main body) of the safety device connecting connector for inserting a flat cable (flat cord (strip-like member)), but this gap is referred to as the "opening" in this description. Furthermore, the side of the frame opposite the opening is referred to as the "spine." Furthermore, the opening side and the spine side of the frame face inwardly toward the frame. For convenience of explanation, these opposing directions are defined as the left-right direction. Following this definition, the direction perpendicular to the left-right direction and passing between the spine and the opening is defined as the up-down direction. Furthermore, the direction perpendicular to both the left-right and up-down directions is defined as the fore-aft direction.

[0015] In addition, the front side of the safety device connecting connector 100 may be described as the "front side," and the side opposite the front side as the "back side." However, these directions are provided for convenience in describing the embodiments and are not intended to specify the specific usage of the safety device connecting connector 100. The top-bottom, front-back, left-right, front-back, and back-side orientations may be modified as appropriate depending on the usage.

[0016] A shackle can be used as an example of an implementation of the safety device connecting connector 100 of this embodiment. Furthermore, the term "gate" refers to a component of the safety device connecting connector that switches between a closed state, in which its front end is in contact with one end of the frame opening, and an open state, in which its front end is separated from that end.

[0017] (Overview of the overall structure) As shown in Figures 1 to 7 , the safety device connection connector 100 comprises a frame 110 and a gate 120. The frame 110 is formed with an axial member (or rod-shaped member, column-shaped member, etc.) so that the ends do not touch each other (forming an open curve) and face the opening. Alternatively, the ends of the frame 110 are formed so as to sandwich the opening. Alternatively, "facing the opening" can be expressed as a C-shape, for example. The opening sandwiched between one end and the other end of the frame 110 is separated by a predetermined gap (see opening 114 in Figures 8 and 9 ), and a gate 120 is provided in this gap. Gate 120 closes the gap in the frame 110, thereby dividing (partitioning) the safety device connection connector 100 into an inner and outer portion. While the safety device connection connector 100 shown in Figure 1 has a generally convex shape, the structure of the safety device connection connector 100 is not limited to this and may also include a concave portion, for example.

[0018] (Frame 110) Figures 1 to 9 are provided as specific examples of the shape of the safety device connection connector. However, shapes with curved ridges are also included in this embodiment. Furthermore, shapes including a straight portion above the frame (second portion 118, described later) are also included in this embodiment. The safety device connection connector 100 shown in Figures 1 to 9 is an example of an embodiment of the present invention, but its shape is unique to this embodiment. This shape is a triangle-like shape with curved corners, including a side including the ridge 112, a side including the first portion 116, and a side formed by combining the ends of the frame 110 and the gate 120. Furthermore, in each figure, the sides are straight, but curved shapes are also possible if the curvature is low.

[0019] In the frame 110 shown in Figure 1, the width of the end portion of the support gate 120, i.e., the lower side, is wider (longer in the horizontal direction) than the upper side. Specifically, the lower side refers to the gate support portion, assuming the major axis for the hook is roughly the vertical direction. However, ideally, the width of the strip, which is more likely to get caught on the lower side, is used as a reference, ensuring that the strip does not move excessively in the horizontal direction relative to the lower side. Furthermore, the lower side is formed into a straight line or a slightly curved shape.

[0020] In addition, the frame 110 has an upper side portion having an end side (convex side) that is closed by contact with the gate 120. The upper side portion is narrowed so that the width limits the movement of an annular member such as a D-ring. The so-called "narrow" means that the length is shorter than the width of the belt-shaped body or the lower side portion that is more likely to be caught on the lower side. In addition, a ridge 112 is provided across the lower side (symbol 116) and the upper side (118) of the frame 110. In the examples of the respective figures, the ridge 112 is formed in a straight line.

[0021] Furthermore, in frame 110 of Figure 1 , the lower end of ridge 112, which generally extends along the vertical direction, curves toward the lower right. The lower end of ridge 112, already curved toward the lower right, further curves toward the upper right. The top end of ridge 112, already curved toward the upper right, forms the lower portion of frame 110 (first portion 116, described later). The lower portion of the frame in Figure 1 is formed in a straight line toward the upper right. The vertical and horizontal directions are described below.

[0022] That is, regardless of whether the ridge 112 is straight or includes a curved portion, a first direction (e.g., a main axis) connecting one end of the ridge 112 to the other end can be defined. The up-down direction in Figure 1 is represented along this first direction, and the following description follows suit (Figures 1-3, 7, etc.). Furthermore, Figure 1 shows a second direction connecting one end of the gate 120 (or frame 110) and the other end, which are arranged to enclose the opening, and the viewpoint of the "up-down direction" (the viewing direction of Figures 1 and 2), roughly on the same plane. Furthermore, an example of an opening is shown as opening 114 in Figures 8 and 9. An example of an end is shown as protrusion 114a in Figures 8 and 9. The direction along the plane and perpendicular to this up-down direction is referred to as the left-right direction.

[0023] The shape (outline shape) of the cross section of frame 110 in the circumferential direction, that is, perpendicular to the axial direction (longitudinal direction and the front-back direction in the figures), will be described. As shown in Figures 3 to 7 , the outer profile of frame 110 slopes downward from the center toward the ends in the width direction of the cross section of frame 110. This structure can be achieved, for example, by compressing the width ends of frame 110 toward the center. This densifies the metal structure, improving its resistance to tensile loads, impact resistance, and fatigue strength.

[0024] <Part 116> Furthermore, in the above plane, assuming that the direction from one end of the ridge 112 to the other end is defined as the vertical direction, and the direction connecting the ridge 112 and the gate 120 is defined as the horizontal direction, the first portion 116 will be described in this direction. The first portion 116 is the top portion of the curve extending from the lower end of the ridge 112, which spans the vertical direction. The first portion 116 is provided so as to span the horizontal direction from the lower end of the ridge 112.

[0025] In the structure of the frame 110 shown in the example of FIG1 , the first portion 116 extends from the lower end of the spine 112 toward the upper right. Furthermore, in FIG1 and FIG2 , the first portion 116 is tilted at an angle of approximately 74° to 76° relative to the spine 112. However, the tilt angle may be anywhere in the range of 50° to 130°. Furthermore, to balance the miniaturization of the frame 110 with the ease of inserting and removing items hung on the safety device connecting connector 100, the tilt angle is preferably in the range of 60° to 110°.

[0026] The length of first portion 116 can be determined based on the object intended to be hung on safety device connector 100 and the length of the contact portion with safety device connector 100. The contact portion refers to the length (width) of the portion of the intended object that comes into contact with first portion 116. In Figure 1, as an example, first portion 116 has a length corresponding to the width of a ribbon (commonly known as a flat rope) used as a lanyard for a fall arrest device. The "corresponding length" here refers to, for example, a length within a range of -20% to +30% of the ribbon's width.

[0027] <Part 2 118> In the structure of frame 110 shown in FIG1 , with ridge 112 on the left and gate 120 on the right, second portion 118 located above ridge 112 is formed into a curved shape (e.g., a roughly arcuate shape) that bulges outward. Specifically, as shown in FIG1 , second portion 118 curves from the upper end of ridge 112 toward the upper right, then toward the lower right. Furthermore, if the curvature of this arcuate second portion 118 is small, a shaft-like member, such as a D-ring, hanging above safety device connecting connector 100 may wobble (the D-ring may slip). This also results in an increase in the overall size of safety device connecting connector 100. Furthermore, second portion 118 does not need to be roughly arcuate. Furthermore, it may include a straight portion, as long as it is not significantly longer than the diameter of the shaft portion of the connecting object, such as a D-ring.

[0028] Safety device connecting connector 100 is designed so that its breaking strength is highest in the axial direction of ridge 112 or in the perpendicular direction from second portion 118 to first portion 116 (the so-called main axis). In other words, the durability of safety device connecting connectors, such as shackles, is generally maintained in this direction.

[0029] For example, consider a carabiner used for mountaineering. The carabiner, a connector for connecting safety devices in this example, has a tensile strength or breaking strength in the longitudinal direction that is at least 10 times greater than that in the transverse direction. In some cases, the transverse tensile strength of a carabiner is 2 kN, while the longitudinal tensile strength is 25 kN. This difference arises from the fact that the lateral tensile strength of a rotating gate is low, while the ridge is highly durable.

[0030] However, depending on the usage, a belt-like member like a flat cable may not necessarily remain in a portion of the connector's inner side. In other words, even conventional safety device connectors may have the belt-like member shift toward the spine depending on the usage. Furthermore, using the example of a carabiner for a lanyard, the metal ring (e.g., the D-ring of a full-body harness) is positioned above the carabiner and the belt-like member below (see Figure 10).

[0031] In this state, a user wearing a full-body harness on the D-ring side has a lifeline on the belt member side (the top and bottom are reversed from Figure 1). Furthermore, if the user falls in this state, the metal ring on the full-body harness side and the belt member on the lanyard side will pull the safety device connecting connector in opposite directions.

[0032] At this time, as shown in Figure 10, if the direction of mutual tension is along the vertical direction of the connector, the connector will be stretched in the direction that best ensures strength. Therefore, as long as the connector has a specified breaking strength, it will not break (or damage). In contrast, if the force acting in the direction of the connector's rotation, as described above, causes the strip-shaped member to move toward the gate or ridge. If the strip-shaped member actually shifts, the risk of the safety device connecting connector breaking increases. This is because the connector's strength in the horizontal direction is generally significantly lower than in the vertical direction.

[0033] In the safety device connecting connector 100 of this embodiment, the width of the first portion 116 is set to correspond to the width of the belt-like member that is most likely to be caught on the first portion 116. Furthermore, the first portion 116 is linear or has a low curvature. Therefore, even when the safety device connecting connector 100 rotates, the first portion 116 maintains close contact with the belt-like member, making it less likely to move left or right due to friction or other factors. Furthermore, even if the belt-like member attempts to move toward the spine 112, it abuts against the spine 112, preventing it from moving. Furthermore, the second portion 118 is formed into an arcuate shape, allowing the metal ring of the full-body harness to remain inside the second portion 118. This prevents the safety device connecting connector 100 from becoming susceptible to breakage, even if the metal ring on the full-body harness and the belt-like member on the lanyard are pulled in opposite directions.

[0034] <Gate Support 123> In the first portion 116 formed horizontally at the lower end of the frame 110, the end opposite the ridge 112 is bent toward the second portion 118. The tip of the bend toward the second portion 118 is interrupted while facing the second portion 118. The distal end of the interrupted portion forms one end of the frame 110, which serves as the gate support 123. The gate support 123 is tilted at an angle of approximately 15° to 60° relative to the ridge 112. An example of this angle is shown in FIG1 . In the example shown in FIG1 , the inclination of the gate support 123 relative to the ridge 112 determines the inclination of the gate 120 relative to the ridge 112.

[0035] The curved, linear portion at the tip of the gate support 123 forms a boundary with the gate 120 (described later). Furthermore, the linear portion of the gate support 123 supports the gate 120. As described later, the gate 120 may be configured to pivot toward the inside (the spine 112 side) of the safety device connection connector 100, but any other configuration is acceptable. However, in any configuration, the gate support 123 of the first embodiment supports the gate 120 at a point further forward than the boundary with the first portion 116.

[0036] As an example, the gate support portion 123 in a structure where the gate 120 rotates toward the inside (the spine 112 side) of the safety device connecting connector 100 will be described. As shown in Figures 4 and 7 , the linear portion of the gate support portion 123 is narrower in width relative to the first portion 116 in the approximate front-to-back direction. This narrowing of the gate support portion 123 by compressing its width densifies the metal forming the frame 110, improving its strength.

[0037] <Protruding portion 114a> The end of the arcuate second portion 118 opposite the ridge 112, that is, the linear front end facing the gate support 123 (the other end of the frame 110), is designated as the protrusion 114a. The protrusion 114a is one of the contact points between the gate 120 and the frame 110. When the protrusion 114a is in contact with the end of the gate 120, the connector is closed. In contrast, when the protrusion is not in contact, the connector is open.

[0038] In addition, the convex portion 114a is formed so as to engage with the concave portion provided on the gate 120. Its shape is, for example, a convex shape that matches the concave portion. In addition, the convex portion 114a is formed into a convex shape along the rotation direction of the gate 120.

[0039] In the example connector shown in Figures 4, 5, 7, and 9, the gate 120 is rotatably supported by a gate support 123 and is configured to rotate inwardly of the safety device connecting connector 100. In this configuration, as the gate 120 rotates inwardly of the safety device connecting connector 100, the contact between the protrusion 114a and the gate 120 is released. Furthermore, if the gate 120 rotates outward from a non-contact state, the protrusion 114a contacts the gate 120. While the gate 120 is rotatably supported by the gate support 123, contact and engagement with the protrusion 114a prevents the gate 120 from rotating outward beyond this position. In other words, the protrusion 114a defines the range of rotation of the gate 120.

[0040] <Gate 120> The gate 120 is the component used to switch between the open and closed states in the safety device connecting connector 100. As shown in Figures 8 and 9, the gate 120 is configured so that, with its base end supported by the gate support 123, its front end can move back and forth between a direction that brings it into contact with the protrusion 114a and a direction that prevents it from contacting the protrusion 114a. The gate 120 is biased outward by a biasing member (not shown). Specifically, the concave portion of the front end of the gate 120 is biased toward the protrusion 114a, causing it to contact the protrusion 114a.

[0041] In this structure, for example, a leaf spring or coil spring (not shown) is provided within gate 120. This spring member is retained by gate support 123 on the side of rotation axis P (Figure 8). Furthermore, the spring member is positioned approximately along the axis of gate 120, toward the front end of gate 120. If gate 120 is pressed against the force applied by the spring member and rotated toward ridge 112, gate 120 bends in the direction of the pressure. Conversely, if the force pressing gate 120 is released, or if the pressing force becomes weaker than the force applied by the spring member, the front end of gate 120 rotates toward convex portion 114a due to the force applied by the spring member.

[0042] The gate 120 shown in Figures 8 and 9 is a so-called twist-lock (automatic lock) mechanism. The gate 120 includes a gate body 122 that rotates as described above, and a locking cover 121. The locking cover 121 is positioned along the axis of the gate body 122, blocking the opening 114 of the frame 110 (see Figures 8 and 9), and covers the periphery of the gate body 122. Furthermore, the locking cover 121 is rotatable about the axis of the gate body 122.

[0043] Furthermore, a front-end slit S1 is provided in the locking cover 121 at a position corresponding to the recessed portion of the shutter body 122 that receives the protrusion 114a (see Figures 7 and 8). The front-end slit S1 has a length in the axial direction of the shutter body 122 such that it contacts at least a portion of the protrusion 114a. Furthermore, the width of the front-end slit S1 is at least wider than the maximum width of the protrusion 114a.

[0044] Furthermore, a proximal slit S2 is provided in the locking cover 121 at a position where the gate body 122 and the gate support portion 123 overlap (see Figures 7 and 8). Specifically, this position is located on the proximal side of the gate 120, descending axially from the distal slit S1 toward the gate support portion 123. The proximal slit S2 has a length such that it contacts at least a portion of the outer surface of the gate support portion 123 in the axial direction of the gate body 122. Furthermore, the width of the proximal slit S2 is at least wider than the widest width of the gate support portion 123.

[0045] Furthermore, the locking cover 121 has a concave cutout at a predetermined distance from the proximal slit S2 in the direction of rotation of the locking cover 121. In the example shown in Figure 8 , the cutout is located to the left of the proximal slit S2, contacting the rotation axis P. The length (width) of the cutout in the rotation direction is slightly wider than that of the distal slit S1. Thus, each widthwise end of the cutout in the locking cover 121 contacts one or both sides of the rotation axis P protruding from the gate support 123, thereby limiting the rotational range of the locking cover 121.

[0046] If the locking cover 121 rotates, as shown in FIG4 , to a position where the protrusion 114a overlaps the distal slit S1, the protrusion 114a is exposed through the distal slit S1, and the gate support 123 is exposed through the proximal slit S2, allowing the gate body 122 to rotate. At this time, as shown in FIG8 , one end of the notch of the locking cover 121 abuts the rotation axis P. This prevents the locking cover 121 from rotating excessively beyond the exposed position, and allows the unlocked state to be easily maintained.

[0047] Furthermore, when the locking cover 121 covers the protrusion 114a and the gate support 123, even if the gate body 122 attempts to rotate, the locking cover 121 abuts against the protrusion 114a and the gate support 123. In other words, the locking cover 121 restricts the rotation of the gate 120. For convenience, this will be referred to as the "locked state." The width of the cutout portion of the locking cover 121 is slightly wider than the width of the front slit S1. This minimizes the amount of rotation required to release the locking cover 121 from the locked state (hereinafter referred to as the "released state"). The released state refers to a state in which the slits (S1, S2) of the locking cover 121 have exposed the protrusion 114a and the gate support 123, respectively.

[0048] In contrast, the locking cover 121 can be rotated from the unlocked state to switch to a locked state, where it covers the protrusion 114a and the gate support 123. If the locking cover 121 is rotated excessively in the rotational direction (forward), the user will need to rotate the locking cover 121 significantly to switch to the unlocked state. However, the other end of the notch (the end opposite to the one end) of the locking cover 121 abuts against the rotation axis P, preventing excessive rotation of the locking cover 121 and minimizing the amount of rotation required to switch to the unlocked state. This makes unlocking the locked state easier, contributing to improved work efficiency.

[0049] Furthermore, a biasing member (not shown) is provided on the inner circumference of the locking cover 121 to bias the locking cover 121 in the direction of rotation toward the locked state. Specifically, the biasing member is used to establish the locked state. However, if the locking cover 121 rotates in the direction of the unlocked state against the force applied by the biasing member, the unlocked state is achieved. If the force rotating the locking cover 121 is released, or if the force is weaker than the force applied by the biasing member, the locking cover 121 is biased and rotated in the direction covering the protrusion 114a and the gate support 123. This results in the locked state being restored.

[0050] Furthermore, the twist lock mechanism shown in Figures 8 and 9 is an example of a gate 120; other structures may also be employed. Specifically, the gate 120 may be of any structure as long as it can be switched between a state in which the opening 114 of the frame 110 is closed and a state in which the opening 114 of the frame 110 is open. For example, the gate 120 may be configured such that the front end of the gate 120 slides axially relative to the end of the frame 110 located at the protrusion 114a, thereby contacting and separating from the end of the frame 110. In this modified embodiment, the gate 120 may also be configured such that the sliding member rotates in a direction perpendicular to the sliding direction, that is, perpendicular to the axial direction of the gate 120, to lock the sliding movement.

[0051] (Function and Effect) The operation and effects of the safety device connecting connector 100 according to the first embodiment described above will be described.

[0052] In the safety device connection connector 100 of the embodiment, the first portion 116 connecting the ridge 112 and the gate support 123 is formed into a straight line or has a small curvature, making it difficult for the strip, which is likely to get caught on the first portion 116, to move in the left-right direction. This prevents the strip's end from deteriorating, such as frayed or broken, due to left-right movement. The surface of the first portion 116 is inclined at a large angle relative to the ridge 112, and is designed to retain items caught on the first portion 116. Furthermore, the second portion 118 is formed into an arc shape or has a greater curvature than the first portion 116. This prevents the shaft, which is likely to get caught on the second portion 118, from moving in the left-right direction (so-called rattling).

[0053] According to this structure, it is possible to prevent an article hung on the safety device connecting connector 100 from moving to a position where the safety device connecting connector 100 is likely to be damaged depending on the usage state of the safety device connecting connector 100.

[0054] Furthermore, the shape of first portion 116 enhances the close contact between the strip-shaped member and first portion 116. Furthermore, the width of first portion 116 is determined in accordance with the width of the strip-shaped member. This prevents the strip-shaped member from moving in the left and right directions. Consequently, the widthwise ends of the strip-shaped member can be prevented from frayed or ruptured. Furthermore, the width of the second portion 118 is set relative to the width of the shaft-like member attached to it. For example, the width of the second portion 118 is set to be only 0.5 mm to a few mm wider than the shaft-like member considered to have the largest diameter (e.g., a 13 mm diameter D-ring). This suppresses lateral movement of the belt-like member. This prevents lateral movement of the shaft-like member attached to the second portion 118. As a result, movement of the shaft-like member, which would otherwise be subjected to tensile strength along its minor axis, is prevented. Furthermore, when the user makes a sudden, large movement (e.g., when falling), the shaft-like member instantly contacts the frame 110, reducing the user's fear.

[0055] (Modification of the first embodiment) 11 to 15B , a modified example of the first embodiment will be described. In FIG11 to 15B , the outer shape of the frame 110 and the protrusion 112P of the safety device connecting connector 100 are shown with solid lines, and the remaining parts are shown with dotted lines, to facilitate identification. <Protrusion 112P> In this modified example, as shown in Figures 11 to 15B , a protrusion 112P is provided on the frame 110 slightly below the center in the vertical direction and on the inner side of the ridge 112. Alternatively, this position is located on the circumferential surface of the ridge 112, on the gate 120 side, and corresponds to the gate 120's rotation axis P side or the gate support portion 123 side in the vertical direction.

[0056] The protrusion 112P is integrally formed with the frame 110. The protrusion 112P includes a base end 112a, a protruding end 112b, and an upper inclined surface 112c that slopes upward from the protruding end 112b toward the circumferential surface of the ridge 112. The base end 112a is located at the boundary with the ridge 112.

[0057] As shown in Figures 13 and 13, the protruding end 112b is the end surface protruding from the protrusion 112P and is formed into a curved surface, that is, with rounded corners. Furthermore, as shown in Figures 11 and 12, the upper inclined surface 112c is formed so that the slope relative to the base end 112a is gentle, while the slope from the protruding end 112b toward the lower side (toward the first portion 116) is relatively steep. This protrusion 112P allows, for example, a flat cord (belt-like member) to be retained on the first portion 116 side.

[0058] To achieve this effect, it is ideal to ensure the height and slope of the downwardly inclined surface from the protruding end 112b. Furthermore, by minimizing the slope of the upper inclined surface 112c, it is easier to guide the strip-shaped member toward the first portion 116. To achieve this, the low-slope upper inclined surface 112c is designed to have a predetermined length. This length is, for example, 2 to 7 times that of the lower inclined surface. This is because a low slope and a short length would prevent the height of the protruding end 112b from being maintained.

[0059] Furthermore, the object remaining on the first portion 116 can have various shapes. For example, the object may be a thick, tape-shaped member, or a tape-shaped member of normal thickness. Therefore, to accommodate a wide range of these objects, the base end of the lower inclined surface of the protrusion 112P is ideally positioned at a height of 8 mm or less from the lower end of the ridge 112.

[0060] According to the safety device connecting connector 100 of this embodiment, a protrusion 112P is provided on the first portion 116 side of the ridge 112. Furthermore, the slope of the protrusion 112P on the first portion 116 side is relatively steep. Therefore, even if the safety device connecting connector 100 attempts to rotate and the belt-shaped member attempts to move toward the ridge 112, the belt-shaped member abuts against the lower surface of the protrusion 112P, preventing movement.

[0061] Furthermore, because the second portion 118 is formed into an arcuate shape, the metal ring of the full-body harness remains inside the second portion 118. This prevents the safety device connecting connector 100 from becoming susceptible to breakage, even if the metal ring on the full-body harness and the belt-like member on the lanyard pull the safety device connecting connector in opposite directions. Furthermore, while the following embodiments are described with the protrusion 112P included, a configuration without the protrusion on the spine 112 is also possible.

[0062] In order to achieve miniaturization of the connecting ring 100 , the height of the protrusion 112P is determined by the ratio of the width of the flat cable to the width of the first portion 116 .

[0063] [Second embodiment] Next, the safety device connecting connector 200 of the second embodiment will be described with reference to Figures 16 to 29. Note that descriptions of parts common to the first embodiment will be omitted as appropriate. The safety device connecting connector 200 of the second embodiment, like the first embodiment, comprises a frame 210 and a gate 220. The structure of the frame 210 is the same as that of the first embodiment, with a first portion 216 provided below the ridge 212 and a second portion 218 provided above it. Furthermore, a gate support 223 is provided at the front end of the first portion 216, and a protrusion 214a is provided at the front end of the second portion 218. The shapes and structures of these parts are the same as those of the first embodiment.

[0064] <Gate Support 223, Protrusion 214a> However, as shown in Figures 23 to 29, in order to tilt the rotation direction of the gate 220 described later, the gate support portion 223 is tilted relative to the ridge 212, approximately corresponding to the tilt angle of the gate 220. Similarly, the convex portion 214a is also configured to be tilted in the same manner.

[0065] <Gate 220> The gate 220 comprises a gate body 222 rotatably supported by a rotation axis P of a gate support 223, and a locking cover 221 disposed around the gate body 222. The illustrated torsion lock mechanism of the gate 220 is the same as that of the first embodiment. However, the rotation axis P is different, so the following description will be summarized.

[0066] Rotation Axis P' In the first embodiment, the rotation axis P is positioned perpendicular to the second direction connecting the protrusion 114a (see Figures 7 and 8, etc.) with the front end of the gate support 123, and the first direction connecting one end of the ridge 112 with the other end. When the first and second directions are assumed to be viewed on the same plane, the gate 120, pivotally supported by the rotation axis P, rotates parallel to the plane. However, in the second embodiment, the gate 220 rotates at an angle relative to the assumed plane. Therefore, compared to the rotation axis P in the first embodiment, the rotation axis P' in the second embodiment is tilted to allow the gate 220 to rotate at a predetermined angle. This tilt angle is described in detail below in the description of the rotation direction of the gate 220.

[0067] Turning Direction As described above, the gate 220 of the second embodiment (e.g., Figures 16 to 22 ) rotates at an angle that is tilted only by a predetermined angle relative to the imaginary plane. The predetermined angle will be described with reference to Figures 26 and 29 . As shown in the upper figures of Figures 26 and 29 , the angle at which the front portion of the front end of the gate 220 (the left side in Figure 26 ) approaches the rear side of the ridge 212 is shown. In these figures, the left front portion of the front edge of the gate 220, rotated to the position farthest from the protrusion 214a, approaches the rear side of the protrusion 212P of the ridge 212. This predetermined angle is the angle.

[0068] Conventionally, the width of the inner area of the frame had to be ensured in accordance with the length from the base end to the front end of the gate. Consequently, the second portion (118, 218) expanded in the left-right direction, making it impossible to prevent the axial member (D-ring, etc.) located in the second portion (118, 218) from shaking. Furthermore, the connector for connecting the safety device became larger and heavier in accordance with the width. In contrast, in this embodiment, the rotation direction is tilted to offset the front end of the gate 220 toward the outside of the frame 210, thereby eliminating the need to ensure the width of the inner area of the frame in accordance with the length from the base end to the front end of the gate. This prevents shaking and miniaturizes the connector for connecting the safety device, resulting in a lighter weight.

[0069] Furthermore, in this embodiment, not only is the front end of gate 220 offset outward from frame 210, but gate 220 is also rotated in such a way that, when tilted most toward ridge 212, the left front portion of the front edge of gate 220 approaches the rear of protrusion 212P. This is because it is ideal for gate 220 to tilt and rotate toward ridge 212. For example, it is common for the user to rotate gate 220 with the twist lock mechanism released. This is because, in anticipation of this situation, it is easier to press an item hung on the safety device connecting connector against gate 220 and rotate it inward toward frame 210.

[0070] However, the tilt angle may be any angle within the range of -90° to -15° or 15° to +90°. Furthermore, from the perspective of operability of the gate 220, the tilt angle is preferably within the range of -60° to -15° or 15° to +60°. Stated another way, if the left front portion or right rear portion of the front edge of the gate 220 moves toward the center, it will collide with the ridge 212. Therefore, the second portion 218 must be enlarged. Consequently, the overall size and weight increase. Furthermore, if the tilt exceeds -60° or 60°, it becomes impossible to open the gate with one hand, reducing operability. Therefore, the aforementioned angles are preferred.

[0071] (Function and Effect) The operation and effects of the safety device connecting connector 200 according to the second embodiment described above will be described.

[0072] According to the safety device connection connector 200 of the embodiment, a protrusion 212P is provided on the inner surface of the ridge 212, on the lower side (the lower side) of the rotation axis P of the gate 220 in the axial direction. Furthermore, the first portion 216 connecting the ridge 212 and the gate support 223 is formed into a straight line or with a shallow curvature. The surface of the protrusion 212P on the first portion 216 side has a large inclination angle and is configured to retain items hanging on the first portion 116 side. Furthermore, the second portion 218 is formed into an arc shape or has a greater curvature than the first portion 216.

[0073] According to this structure, it is possible to prevent an article hung on the safety device connecting connector 200 from moving to a position where the safety device connecting connector 200 is likely to be damaged due to the usage state of the safety device connecting connector 200 and the like.

[0074] Furthermore, in this embodiment, the front end of the gate 220 is offset outward from the frame 210, and the left front portion of the front edge of the gate 220 is not excessively separated from the ridge 212. This structure allows the user to rotate the gate 220 by releasing the twist lock mechanism, pressing items against the gate 220 to rotate it, making it easier to hang items. This structure also prevents any impact on durability. Furthermore, by tilting the rotation direction to offset the front end of the gate 220 outward from the frame 210, it is no longer necessary to ensure a sufficient width inside the frame to cover the entire length from the base to the front end of the gate. This prevents rattling and reduces the size of the connector used to connect the safety device, ultimately achieving weight reduction.

[0075] [Third embodiment] Next, the safety device connection connector 300 of the third embodiment will be described with reference to Figure 30 . Regarding parts common to the second embodiment, descriptions will be omitted as appropriate. The safety device connection connector 300 of the third embodiment comprises a frame 310 and a gate 320, similar to the second embodiment. The structure of the frame 310 is the same as that of the first embodiment, with a first portion 316 provided below the ridge 312 and a second portion 318 provided above it. Furthermore, a gate support 323 is provided at the front end of the first portion 316, and a protrusion 314a is provided at the front end of the second portion 318. The shapes and structures of these parts are the same as those of the second embodiment.

[0076] <Protrusion 312P> In the third embodiment, protrusion 312P is provided so as to cover the inner surface of ridge 312 from the front, through the right side (inward of frame 310), and to the rear. Furthermore, the base end 312a and the protruding end 312b of protrusion 312P are curved, and the inclination angle of the upper inclined surface 312c is the same as that described in the first embodiment.

[0077] Furthermore, in the third embodiment, the protrusion 312P is provided so as to cover the inner surface of the ridge 312 from the front, through the right side (inward from the frame 310), and to the rear. However, this configuration is not limiting. For example, the protrusion 312P may be provided in a truncated cone or a frustum of a cone shape so as to cover the circumference of the axis of the ridge 312.

[0078] (Function and Effect) The safety device connecting connector of the third embodiment described above can also prevent an article hung on the safety device connecting connector 300 from moving to a position where the safety device connecting connector 300 is likely to be damaged due to the usage state of the safety device connecting connector 300.

[0079] Furthermore, in the combination of this embodiment and the second embodiment, similar to the second embodiment, when the user releases the twist lock mechanism and rotates the gate 320, the user can press the object against the gate 320 to rotate it, making it easier to hang the object. Furthermore, this structure can prevent the durability from being affected.

[0080] [Fourth embodiment] Next, a safety device connecting connector 300 according to a fourth embodiment will be described with reference to Figures 31 to 36. Note that only the first and second portions of the frame differ from those of the first to third embodiments, and therefore description of the other portions will be omitted.

[0081] The safety device connection connector in the fourth embodiment is constructed similarly to the previous embodiments, comprising a frame and a gate. The frame's ridge structure is the same as in the previous embodiments, but the shape of the first portion connected to the lower portion of the ridge 312 and the shape of the second portion connected to the upper portion differ. Furthermore, the gate support portion is provided at the front end of the first portion, and the protrusion is provided at the front end of the second portion, similar to the previous embodiments.

[0082] As shown in Figures 31 to 36, in the fourth embodiment, the shapes of the first and second portions of the aforementioned embodiments are reversed. That is, the first portion is arc-shaped, and the second portion is formed into a straight line or a linear curve with a small curvature.

[0083] Furthermore, in the fourth embodiment, the frame as a whole is also structured by compressing each end of the frame toward the center to make the metal structure denser. This improves the resistance to tensile loads, impact resistance, and fatigue strength.

[0084] (Function and Effect) The safety device connecting connector of the fourth embodiment described above can also prevent an article hung on the safety device connecting connector from moving to a position where the safety device connecting connector is likely to be damaged due to the usage state of the safety device connecting connector.

[0085] Furthermore, unlike the first through third embodiments, this embodiment envisions the use of objects with diameters up to 16mm or 18mm, such as lifeline or climbing ropes, on the second portion. This requires a wider second portion than the D-rings of the first through third embodiments, which have diameters up to 13mm. Furthermore, in lifesaving situations, the lifeline must be attached and detached extremely quickly, requiring ample width.

[0086] The safety device connecting connectors of the first through fourth embodiments and their variations prevent items hung on the connector from moving to positions where the connector could be damaged, depending on the connector's usage. As a result, when used to connect safety harnesses and lifelines used in mountaineering, aerial work, or lifesaving, accidents caused by safety device connecting connector damage can be prevented, providing users with peace of mind. When used with containers, work tools, and the like, accidents caused by the container or tool falling, as well as economic losses caused by damage, can be prevented.

[0087] Furthermore, the above-mentioned embodiments or modifications can be appropriately combined to obtain the effects of each embodiment and the synergistic effect when combined. The invention comprises: a frame having a hook portion formed by bending back from one end of a straight portion, with an area from the front end of the bend to the inner side of the bent portion being set as a hanging area; a gate supported by the other end side of the straight portion of the frame and rotating between a direction of abutment with respect to the front end of the hook portion and a direction of separation; a rotating shaft of the gate; a hole portion penetrated in a direction substantially the same as the axial direction of the rotating shaft relative to the frame; and a locking portion capable of reciprocating along the hole portion, being forced toward one side of the frame, and having an abutment portion protruding from the hole portion on the one side.

[0088] [Fifth embodiment] Next, the fifth embodiment of the safety device connecting connector 500 will be described with reference to Figures 37 to 45. Note that descriptions of parts common to the second embodiment will be omitted as appropriate. The fifth embodiment of the safety device connecting connector 500 comprises a frame 510 and a gate 520, similar to the second embodiment. The structure of the frame 510 is the same as the second embodiment, with a first portion 516 provided below the ridge 512 and a second portion 518 provided above it. Furthermore, a gate support 523 is provided at the front end of the first portion 516, and a protrusion 514a is provided at the front end of the second portion 518. The shapes and structures of these parts are the same as those of the second embodiment.

[0089] <Spine 512> In the fifth embodiment, unlike the second embodiment, the protrusion 212P is not provided.

[0090] (Function and Effect) The safety device connecting connector of the fifth embodiment described above can also prevent items hung on the safety device connecting connector 500 from moving to a position where the safety device connecting connector 500 is likely to be damaged due to the usage state of the safety device connecting connector 500.

[0091] Furthermore, similar to the second embodiment, when the user releases the twist lock mechanism and rotates gate 520, they can press items against gate 520 to rotate it, making it easier to hang. This structure also prevents any impact on durability. Furthermore, by tilting the rotation direction to offset the front end of gate 520 outward from frame 510, there's no need to ensure a sufficient width inside the frame to cover the distance from the gate's base to its front end. This prevents rattling and reduces the size of the connector used to connect the safety device, ultimately reducing weight.

[0092] (Note) [Claim A] A connector for connecting a safety device, comprising: The frame is formed into an open curved shape with its ends facing each other, and has an opening between the ends for inserting a connecting portion of the safety device; and The gate is provided in a manner to block the opening and is supported by one end of the frame. When it contacts the other end, the gate closes the opening. When the contact with the other end is released, the gate opens the opening. The frame has a ridge on the side opposite to the opening, Among the frame portions that are continuous with the ends of the ridge, there is a first portion that is continuous with the end of the frame on the gate support side, The second portion further comprises a portion connecting the ridge on the opposite side to the first portion to the convex portion of the portion abutting against the gate tip. When the gate is rotated and its front end is farthest from the one end of the frame, when a first direction from one end of the ridge toward the other end and a second direction connecting the one end and the other end are observed on the same plane, the extension direction of the gate is inclined by more than 10° relative to the plane. [Request B] The safety device connecting connector according to claim A, wherein the first portion is formed in a straight line or has a small curvature so as to be able to suspend a belt-shaped body. Among the frame portions, the second portion is located on the opposite side of the first portion and is formed to have a large curvature to suppress movement of the annular member including the shaft member. [Request C] The safety device connecting connector according to claim A or claim B includes a protrusion that projects at least toward the inner side of the frame, thereby partially reducing the area between the opening side and the ridge side opposite to the opening. When one end side of the frame is set downward and the other end side of the frame is set upward, the protrusion is provided on the lower side of the ridge or near the one end side and is formed integrally with the frame. The gate is rotatably supported by one end portion of the frame. When the gate is rotated from the closed state with the one end portion as the center, the gate is released from contact with the other end portion and enters the open state. [Claim D] The safety device connecting connector according to any one of claims A to C, wherein the protrusion is provided on the ridge. [Claim E] The safety device connecting connector according to any one of claims A to D, wherein the protrusion is formed so as to protrude not only toward the inner side of the frame but also toward the side. [Claim F] A safety device connection connector as described in any one of claims A to E, wherein the inclination angle of the gate is any angle in the range of -90° to -15° or 15° to +90°. [Request G] A connector for connecting a safety device comprises: a frame formed into an open curved shape with ends facing each other, having an opening between the ends for inserting a connecting portion of the safety device; and a gate arranged to block the opening and supported by one end of the frame, which closes the opening when in contact with the other end and opens the opening when the contact with the other end is released. It may also include a protrusion, which protrudes at least toward the inner side of the frame, thereby reducing the area between the opening side and the ridge side opposite to the opening. When one end side of the frame is set to the bottom and the other end side of the frame is set to the top, the protrusion is arranged on the bottom side of the ridge and is formed integrally with the frame.

[0093] While the embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms and may be omitted, replaced, or modified without departing from the spirit of the invention. These embodiments and their variations are intended to be included within the scope and spirit of the invention and within the scope of the invention described in the patent application and its equivalents.

[0094] 100: Safety device connection connector (connecting ring) 200, 300, 500: Safety device connection connector 110, 210, 310, 510: frame 112, 212, 312, 512: ridge 112a, 212a, 312a: base end 112b, 212b, 312b: protruding end 112c, 212c, 312c: upper inclined surface 112P, 212P: protrusion 114, 214, 314: Opening 114a, 214a, 314a, 514a: convex part 116, 216, 316, 516: Part 1 118, 218, 318, 518: Part 2 120, 220, 320, 520: Gate 121, 221, 321: Locking cover 122, 222, 322: Gate body 123, 223, 323, 523: Gate support S1: Front side slit S2: Base end slit P, P': rotation axis

Claims

1. A connector for connecting a safety device, characterized in that it comprises: The frame is formed in an open curve shape with the ends facing each other, and has an opening for a connection between the ends into which a safety device is inserted; The frame includes a gate, which is configured to block the opening and is supported by one end of the frame. When it abuts against the other end, the opening is closed; if the abutment against the other end is released, the opening is opened. The frame has a ridge on the side opposite to the opening. Among the frame portions continuous with each end of the ridge, a first portion continuous with the end of the frame on the gate support side is formed as a straight line or has a small curvature to allow suspension of a strap. Among the frame portions, a second portion located on the opposite side of the first portion, continuous with the end of the ridge on the opening side, has a large curvature to suppress movement of the annular member containing the shaft member. The connector for connecting the safety device further includes a protrusion that protrudes at least toward the inside of the frame, thereby reducing the area between the opening side and the ridge side opposite to the opening. When one end of the frame is positioned downwards and the other end of the frame is positioned upwards, the protrusion is located on the lower side of the ridge or near the one end, integrally formed with the frame. The gate is rotatably supported at one end of the frame. If the gate is rotated from the closed state with the closed end as the center, the contact with the other end is released and the gate becomes open. When the gate is rotated and its front end is furthest away from the one end of the frame, when viewed in the same plane in the first direction and the second direction connecting the one end and the other end, the extension direction of the gate is inclined at more than 10° relative to the plane. The protrusion is formed in such a way that it protrudes not only toward the inside of the frame but also toward the side.

2. A connector for connecting a safety device, characterized in that it comprises: The frame is formed in an open curve shape with the ends facing each other, and has an opening for a connection between the ends into which a safety device is inserted; The frame includes a gate, which is configured to block the opening and is supported by one end of the frame. When it abuts against the other end, the opening is closed; if the abutment against the other end is released, the opening is opened. The frame has a ridge on the side opposite to the opening. Among the frame portions continuous with each end of the ridge, a first portion continuous with the end of the frame on the gate support side is formed as a straight line or has a small curvature to allow suspension of a strap. Among the frame portions, a second portion located on the opposite side of the first portion, continuous with the end of the ridge on the opening side, has a large curvature to suppress movement of the annular member containing the shaft member. The connector for connecting the safety device further includes a protrusion that protrudes at least toward the inside of the frame, thereby reducing the area between the opening side and the ridge side opposite to the opening. When one end of the frame is positioned downwards and the other end of the frame is positioned upwards, the protrusion is located on the lower side of the ridge or near the one end, integrally formed with the frame. The gate is rotatably supported at one end of the frame. If the gate is rotated from the closed state with the closed end as the center, the contact with the other end is released and the gate becomes open. When the gate is rotated and its front end is furthest away from the one end of the frame, when the first direction and the second direction connecting the one end and the other end are viewed on the same plane, the extension direction of the gate is inclined at more than 10° relative to the plane. The angle formed between the lower side of the inclined surface connecting the inner protruding end of the protrusion to the base end and the frame is more than 50°.

3. A connector for connecting a safety device, characterized in that it comprises: The frame is formed in an open curve shape with the ends facing each other, and has an opening for a connection between the ends into which a safety device is inserted; The frame includes a gate, which is configured to block the opening and is supported by one end of the frame. When it abuts against the other end, the opening is closed; if the abutment against the other end is released, the opening is opened. The frame has a ridge on the side opposite to the opening. Among the frame portions continuous with each end of the ridge, a first portion continuous with the end of the frame on the gate support side is formed as a straight line or has a small curvature to allow suspension of a strap. Among the frame portions, a second portion located on the opposite side of the first portion, continuous with the end of the ridge on the opening side, has a large curvature to suppress movement of the annular member containing the shaft member. The connector for connecting the safety device further includes a protrusion that protrudes at least toward the inside of the frame, thereby reducing the area between the opening side and the ridge side opposite to the opening. When one end of the frame is positioned downwards and the other end of the frame is positioned upwards, the protrusion is located on the lower side of the ridge or near the one end, integrally formed with the frame. The gate is rotatably supported at one end of the frame. If the gate is rotated from the closed state with the closed end as the center, the contact with the other end is released and the gate becomes open. When the gate is rotated and its front end is furthest away from the one end of the frame, when the first direction and the second direction connecting the one end and the other end are viewed on the same plane, the extension direction of the gate is inclined at more than 10° relative to the plane, and the angle formed between the upper side of the inclined surface connecting the inner protruding end of the protrusion to the base end and the frame is less than 40°.

4. A connector for connecting a safety device as described in any one of claims 1 to 3, wherein the protrusion is provided on the ridge.

5. A connector for connecting a safety device as claimed in any one of claims 1 to 3, wherein the frame is formed with the lower side being longer than the upper side in the first direction.

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