JP6981649B2 - Hook body and hook for safety belt - Google Patents

Description

The present invention relates to a hook body and a hook for a safety belt worn by a worker who works at a high place or the like.

Workers who work at heights, etc., wear a safety belt and hook the hook-shaped hook provided at the tip of the lanyard to a suspended object such as a structure to prevent it from falling or falling. I do.

Here, FIG. 3 is a diagram showing a hook for a conventional safety belt.
The hook for the safety belt shown in FIG. 3 is one of the members constituting the lanyard together with the rope, and includes the hook main body 200 and the outer stop body 300. The hook main body 200 includes a substantially U-shaped main body 210 and a rope anchoring body 220. The rope anchoring body 220 is provided with a fastening portion 221 which is a connecting portion with the rope.
The outer stop body 300 prevents the hook body 200 from being unexpectedly detached from the object to be connected. The outer stop body 300 is configured to be rotatable about a rear end connected to the rope stop body 220. The outer stop body 300 is urged outward by a spring 400, and usually the tip abuts on the tip of the hook body 200 to close the hook opening. Further, when the hook is hooked to the object to be hooked, the hook can be opened by pushing the outer stopper 300 inward against the force of the spring 400. In FIG. 3, the outer stop body 300 in a state of being displaced inward is shown by a two-dot chain line.
A recess 213 is formed in the main body 210 between the front end portion 211 and the rear end portion 212. The thickness 214T of the inner peripheral portion 214 and the thickness 215T of the outer peripheral portion 215 of the portion where the concave portion 213 is formed are the same.

Further, Patent Document 1 describes a hook body having a hook portion at the tip and an annular portion at the base end, an opening / closing lever that rotates so that the hook opening of the hook body can be opened / closed, and an opening / closing lever that is pivotally supported by the hook body. Equipped with a retaining bracket that controls rotation, the open / close lever forms a substantially inverted Y-shape, with a support shaft on one of the Y-shaped bifurcations, a shaft support near the base end, and another support shaft on the other. A fall prevention hook including a base slidably arranged in a long hole of a retaining metal fitting and an arm portion extending from a Y-shaped bifurcation to open and close the hook is disclosed.
Further, Patent Document 2 includes a hook portion, a closed body swingably supported by the hook portion, and a first urging member for urging the closed body from an open position to a closed position. The hook is disclosed.
Further, in Patent Document 3, the base of the hook body having a J-shape is elastically supported so as to be swingable via a pivot axis, and the tip is engaged with the tip of the hook body to form a closed region inside the hook body. A lock arm for maintaining the linked posture between the gate arm to be formed and the hook body is provided, an engaging claw portion is formed at the tip of the hook body, and the engaging claw portion of the hook body is inserted through the gate arm to form an edge thereof. A hook having an opening for preventing the engaging claw portion from coming off is disclosed.

Utility Model Registration No. 3190041 Japanese Unexamined Patent Publication No. 2017-144078 Japanese Unexamined Patent Publication No. 2010-284279

When the worker is suspended in the air, a large tensile load or bending load is applied to the hook hooked to the locked object. Even in that case, giving sufficient strength so as not to break or deform is also performed in the conventional hook shown in FIG. 3, but the development of a lighter and stronger hook is expected. There is.
Here, Patent Document 1 describes that a lightweight and tough hook is realized by using cast aluminum for the hook body, the opening / closing lever, and the retaining metal fitting, but the thickness and shape of the hook body are specified. There is no specific description.
Further, the invention described in Patent Document 2 is intended to prevent a worker's gloves or fingers from being pinched by the hook, and is not related to weight reduction or strength improvement of the hook body.
Further, the invention described in Patent Document 3 is intended to improve the linking strength between the gate arm (outer stop body) constituting the hook and the hook main body, and is not related to weight reduction or strength improvement of the hook main body. ..

Therefore, an object of the present invention is to provide a hook body and a hook for a safety belt which is lightweight and has excellent strength.

The hook body for the safety band of the present invention according to claim 1 is a hook body 1 used for a hook whose one end is connected to the other end of the rope connected to the safety band, and the connection to which the rope is fastened. A rope anchoring body 20 having a stop portion 21 and a main body 10 extending from the rope anchoring body 20 and curved so as to be folded back toward the rope anchoring body 20 by a curved portion 11 are provided. From the tip portion 12 to the rear end portion 13, the first raised portion 14 is on the inner peripheral side, the second raised portion 15 is on the outer peripheral side, and between the first raised portion 14 and the second raised portion 15. The recess 16 is provided, the thickness 16T of the recess 16 is smaller than the thickness of the tip portion 12 and the rear end portion 13, and the thickness 15T of the second raised portion 15 is the thickness of the tip portion 12 and the rear end portion. The thickness 14T of the first raised portion 14 is larger than the thickness 15T of the second raised portion 15, and the cross-sectional shape of at least a part of the second raised portion 15 is substantially trapezoidal or trapezoidal. It is characterized by having a substantially triangular shape and having an inner thickness of 15Ti larger than an outer thickness of 15To.

According to the second aspect of the present invention, in the hook body for the safety belt according to the first aspect, the inner thickness 15Ti of the second raised portion 15 is 1.3 times or more the outer thickness 15To. It is characterized by being 6 times or less.

According to the third aspect of the present invention, in the hook body for the safety belt according to the first or second aspect, the thickness 14T of the first raised portion 14 is curved from the rear end portion 13 of the main body 10. It is characterized in that it gradually increases toward the portion 11 and gradually decreases from the curved portion 11 of the main body 10 to the tip portion 12.

According to a fourth aspect of the present invention, in the hook body for a safety belt according to any one of claims 1 to 3, the first raised portion 14 and the recess 16 are interposed via an inclined portion 17. It is characterized by being connected.

According to a fifth aspect of the present invention, in the hook body for a safety belt according to any one of claims 1 to 4, the anchoring portion 21 of the rope anchoring body 20 has a circular opening. A circular third raised portion 22 is provided around the opening.

The hook for the safety belt of the present invention according to claim 6 is the hook body 1 for the safety belt according to any one of claims 1 to 5, and is locked by the hook body 1. It is characterized by being equipped with an outer stop that prevents it from coming off the object.

According to the present invention, it is possible to provide a hook body and a hook for a safety belt which is lightweight and has excellent strength.

The figure which shows the hook body for the safety belt by one Embodiment of this invention. The figure which shows the hook body for a safety belt at the study stage of this invention. Diagram showing a hook for a conventional safety belt

The hook body for the safety band according to the first embodiment of the present invention is a hook body used for a hook connected to the other end of a rope whose one end is connected to the safety band, and is a connection to which the rope is fastened. It includes a rope anchor with a stop and a subject that extends from the rope anchor and is curved so that it is folded back toward the rope anchor by a curved portion. A first raised portion is provided on the inner peripheral side, a second raised portion is provided on the outer peripheral side, and a recess is provided between the first raised portion and the second raised portion. The thickness of the second ridge is greater than or equal to the thickness of the tip and rear ends, the thickness of the first ridge is greater than the thickness of the second ridge, and at least some of the second ridges are. The cross-sectional shape is substantially trapezoidal or substantially triangular, and the inner thickness is larger than the outer thickness.
According to the present embodiment, the first raised portion is provided on the inner peripheral side of the main body, the second raised portion is provided on the outer peripheral side of the main body, and at least a part of the second raised portion has a substantially base cross-sectional shape. By forming a shape or a substantially triangular shape and making the inner thickness larger than the outer thickness, the main body is less likely to buckle even if the width of the main body is increased, and the strength of the main body can be increased. Further, by making the thickness of the second raised portion smaller than the thickness of the first raised portion, it is possible to suppress the increase in mass as compared with the case where the thickness of the first raised portion and the thickness of the second raised portion are the same. .. Further, by providing the first raised portion and the second raised portion to increase the strength of the main body, the thickness of the recess located between the first raised portion and the second raised portion is reduced to the thickness of the first raised portion and the second raised portion. Since it can be made smaller than the case where the raised portion is not provided, the weight of the main body as a whole can be reduced more than before.

In the second embodiment of the present invention, in the safety belt hook body according to the first embodiment, the inner thickness of the second raised portion is 1.3 times or more and 1.6 times or less the outer thickness. It is something to do.
According to this embodiment, the strength of the main body of the hook body can be further increased.

In the third embodiment of the present invention, in the hook body for the safety belt according to the first or second embodiment, the thickness of the first raised portion gradually increases from the rear end portion of the main body to the curved portion. It gradually becomes smaller from the curved part of the main body to the tip part.
According to the present embodiment, by making the thickness of the first raised portion different depending on the position, it is possible to suppress the increase in mass while increasing the required strength.

A fourth embodiment of the present invention is a hook body for a safety belt according to any one of the first to third embodiments, in which the first raised portion and the recess are connected via an inclined portion. It is something that is.
According to the present embodiment, it becomes easier to forge and form the main body of the hook body as compared with the case where the inclined portion is not inserted. In addition, the angular part of the main body can be reduced.

A fifth embodiment of the present invention is a hook body for a safety belt according to any one of the first to fourth embodiments, in which the rope anchoring portion has a circular opening and is open. A circular third ridge is provided around the rope.
According to the present embodiment, it is possible to improve the strength of the portion where the opening which is the anchoring portion is formed.

The hook for the safety belt according to the sixth embodiment of the present invention is composed of the hook body for the safety belt according to any one of the first to fifth embodiments and the locked object to which the hook body is hooked. It is equipped with an external stop that prevents it from coming off.
According to the present embodiment, it is possible to provide a hook for a safety belt that is lightweight and has excellent strength.

Hereinafter, the hook body and the hook for the safety belt according to the embodiment of the present invention will be described.
1A and 1B are views showing a hook body for a safety belt according to an embodiment of the present invention, FIG. 1A is a front view and a cross-sectional view, and FIG. 1B is a bottom view.
The hook body 1 is used for a hook-shaped hook for a safety belt. The hook is one of the members constituting the lanyard together with the rope, and includes a steel hook body 1 and an outer stop (not shown in FIG. 1). One end of the rope is connected to the safety belt and the other end is connected to the hook. The operator can prevent a disaster such as a fall or a fall by hooking the hook to a hanging object such as a structure to perform the work.
As the outer stop body, for example, an outer stop body as shown in FIG. 3 can be used, and the hook main body 1 hooked to the engaged locking object such as a structure is hooked by the outer stop body. It is prevented from coming off the object.

The hook main body 1 includes a substantially U-shaped main body 10 and a rope anchoring body 20. The rope anchoring body 20 is provided with a fastening portion 21 which is a connecting portion with the rope.
The main body 10 has a curved portion 11 extending from the rope anchoring body 20 and extending a predetermined amount from the rope anchoring body 20, and has a curved shape so as to be folded back toward the rope anchoring body 20. ing. The front end portion 12 and the rear end portion 13 of the main body 10 are separated from each other.
The anchoring portion 21 of the rope anchoring body 20 has a circular opening, and the rope is anchored using this opening.

The main body 10 has a first raised portion 14 on the inner peripheral side, a second raised portion 15 on the outer peripheral side, and a first raised portion 14 and a second raised portion 15 between the tip portion 12 and the rear end portion 13. A recess 16 is provided between the and. The thickness 16T of the recess 16 is smaller than the thickness of the tip portion 12 and the rear end portion 13, and the thickness 15T of the second raised portion 15 is equal to or larger than the thickness of the tip portion 12 and the rear end portion 13, and the thickness of the first raised portion 14 is increased. The thickness of 14T is larger than the thickness of 15T of the second raised portion 15.
In order to increase the strength of the main body 10 against a tensile load or a bending load, it is necessary to increase the width W of the main body 10. However, simply increasing the width W causes the main body 10 to increase when a load is applied to the main body 10. It buckles and the desired strength cannot be obtained. Further, in order to make the main body 10 less likely to buckle, it is conceivable to increase the thickness of the main body 10, but simply increasing the thickness of the main body 10 increases the mass and makes it difficult to handle.
Therefore, in the hook according to the present embodiment, the strength of the main body 10 is increased and the width W is lengthened by providing the first raised portion 14 on the inner peripheral side of the main body 10 and the second raised portion 15 on the outer peripheral side of the main body 10. Even so, the subject 10 is less likely to buckle. Further, by making the thickness 15T of the second raised portion 15 smaller than the thickness 14T of the first raised portion 14, compared with the case where the thickness 14T of the first raised portion 14 and the thickness 15T of the second raised portion 15 are the same. And suppresses the increase in mass. Further, by providing the first raised portion 14 and the second raised portion 15 to increase the strength of the main body 10, the thickness 16T of the recess 16 located between the first raised portion 14 and the second raised portion 15 is increased. Since the size can be reduced as compared with the case where the first raised portion 14 and the second raised portion 15 are not provided, the weight of the main body 10 as a whole can be reduced more than before. When the recess 16 is provided with a hole or a slit, the main body 10 can be further reduced in weight.

The thickness 14T of the first raised portion 14 of the main body 10 gradually increases from the rear end portion 13 to the curved portion 11, and becomes the thickest at the portion approaching the curved portion 11 (the position of the alternate long and short dash line A), and then the tip portion. It gradually becomes smaller toward 12.
In this embodiment, the thickness 14T of the first raised portion 14 at the position of the alternate long and short dash line A is 45 degrees from that, and the thickness 14T of the first raised portion 14 at the portion located on the tip 12 side (the position of the alternate long and short dash line B). About 1.03 times the thickness of 14T of the first raised portion 14 of the portion located 90 degrees or 135 degrees from the position of the alternate long and short dash line A and located on the tip 12 side (positions of the alternate long and short dash lines C and D). It is set to 1 time. The thickness 14T of the first raised portion at the position of the alternate long and short dash line C is the same as the thickness 14T of the first raised portion at the position of the alternate long and short dash line D.
By making the thickness 14T of the first raised portion 14 different depending on the position in this way, it is possible to suppress the increase in mass while increasing the strength of the portion where a particularly large load is likely to be applied.
Further, the thickness 16T of the recess 16 is made uniform regardless of the position. Therefore, the thickness 16T of the recess 16 at the position of the alternate long and short dash line A, the thickness 16T of the recess 16 at the position of the alternate long and short dash line B, the thickness 16T of the recess 16 at the position of the alternate long and short dash line C, and the recess 16 at the position of the alternate long and short dash line D. The thickness 16T is the same.

The width W of the main body 10 gradually increases from the rear end portion 13 to the curved portion 11, becomes the longest at the portion approaching the curved portion 11 (the position of the alternate long and short dash line A), and then gradually decreases toward the tip portion 12. ing.
In this embodiment, the width W at the position of the alternate long and short dash line A is about 1.2 times the width W at the position of the alternate long and short dash line B, about 1.8 times the width W at the position of the alternate long and short dash line C, and the position of the alternate long and short dash line D. It is about 2.2 times the width W in.
By making the width W of the main body 10 different depending on the position in this way, it is possible to suppress the increase in mass while increasing the strength of the portion where a particularly large load is likely to be applied.

The first raised portion 14 of the main body 10 and the recess 16 are connected via an inclined portion 17. By providing the inclined portion 17, the connecting portion between the first raised portion 14 having a relatively large step and the recess 16 becomes gentle, and it becomes easier to forge and form the main body 10 as compared with the case where the inclined portion 17 is not provided. In addition, the angular portion of the main body 10 can be reduced.

The thickness 20T of the rope anchoring body 20 is smaller than the thickness of the front end portion 12 and the rear end portion 13 of the main body 10. Further, around the circular opening of the anchoring portion 21, a circular third raised portion 22 having a thickness larger than the thickness 20T of the rope anchoring body 20 is provided. As a result, the thickness 20T of the rope anchoring body 20 can be made smaller than the conventional one to reduce the weight, and the strength of the portion where the anchoring portion 21 (opening) is formed can be maintained or improved.
Further, the rope constituting the lanyard together with the hook may be easily broken due to the contact portion with the fastening portion 21 being rubbed and unraveled due to aged deterioration. Normally, the rope is covered with a plastic molded product or the like as an anti-scratch product, but if the rope itself is deteriorated, it is easily affected by the shape of the fastening portion 21.
Therefore, in the hook according to the present embodiment, the third raised portion 22 having a thickness larger than the thickness 20T of the rope anchoring body 20 is provided around the anchoring portion 21, and the contact area with the rope is increased to rub the rope. Is reduced. This makes it possible to reduce the risk of rope breakage at the anchoring portion 21 due to deterioration over time.
The thickness 22T of the third raised portion 22 is preferably 1.4 times or more and 1.7 times or less, and 1.5 times or more and 1.6 times or less the thickness of the rope anchoring body 20. Is more preferable. As a result, the strength of the portion where the anchoring portion 21 is formed can be further improved while suppressing the increase in the mass of the hook, and the R of the contact portion with the rope is increased to further increase the contact area and deteriorate over time. The risk of rope breakage at the anchoring portion 21 due to the above can be further reduced.

Here, FIG. 2 is a view showing a hook body for a safety belt in the study stage of the present invention, FIG. 2A is a front view and a cross-sectional view, and FIG. 2B is a bottom view. The hook and the same functional member as the main body according to the present embodiment are designated by the same reference numerals, and the description thereof will be omitted.
In the hook shown in FIG. 2, the thickness 15T of the second raised portion 15 is made uniform regardless of the position. Therefore, the thickness 15T of the second raised portion 15 at the position of the alternate long and short dash line A, the thickness 15T of the second raised portion 15 at the position of the alternate long and short dash line C, and the thickness 15T of the second raised portion 15 at the position of the alternate long and short dash line D are the same. Is. Further, the second raised portion 15T has the same inner thickness and outer thickness, and has a substantially square cross-sectional shape.

On the other hand, the hook according to the present embodiment shown in FIG. 1 is a cross section of the second raised portion 15 from the vicinity of the rear end portion 13 to the portion beyond the intermediate portion of the curved portion 11 (before the position of the alternate long and short dash line C). The shape is substantially trapezoidal or substantially triangular, and the inner thickness 15Ti of the second raised portion 15 is made larger than the outer thickness 15To of the second raised portion 15. The outer thickness 15To is the same as the thickness of the front end portion 12 and the rear end portion 13.
As a result, the thickness 15T of the second raised portion 15 at the position of the alternate long and short dash line A and the thickness 15T of the second raised portion 15 at the position of the alternate long and short dash line B are such that the inner thickness 15Ti is larger than the outer thickness 15To. .. Further, the thickness 15T of the second raised portion 15 at the positions of the alternate long and short dash lines C and D is the same on the inside and the outside.
Further, the thickness 15T of the second raised portion 15 at the positions of the alternate long and short dash lines C and D is the same as the outer thickness 15To of the second raised portion 15 at the positions of the alternate long and short dash lines A and B.
Further, the thickness of the inner thickness 15Ti of the second raised portion 15 at the position of the alternate long and short dash line A is the same as the thickness of the inner thickness 15Ti of the second raised portion 15 at the position of the alternate long and short dash line B.
Further, the outer thickness 15 To of the second raised portion 15 at the position of the alternate long and short dash line A is the same as the outer thickness 15 To of the second raised portion 15 at the position of the alternate long and short dash line B.
In this embodiment, the cross-sectional shape of the second raised portion 15 from the vicinity of the rear end portion 13 to the portion beyond the intermediate portion of the curved portion 11 is substantially trapezoidal or substantially triangular, but all the second raised parts are formed. The cross-sectional shape of the portion 15 may be substantially trapezoidal or substantially triangular, and the inner thickness 15Ti of the second raised portion 15 may be larger than the outer thickness 15To of the second raised portion 15.

Conventional hooks for safety belts usually have a wall thickness of 4.0 mm to 5.0 mm. Forged products are manufactured with a burr portion of about 1 mm left, but in the past, when forging a hook for a safety belt, the difference in wall thickness between the burr portion and the hook body was small, so there were restrictions on deburring equipment. Therefore, it was difficult to deburr the inside of the hook body.
On the other hand, in the hook according to the present embodiment, the hook body 1 is provided with the first raised portion 14 having a thickness larger than that of the tip portion 12 and the rear end portion 13 to increase the wall thickness difference between the burr portion and the hook body. Therefore, deburring processing becomes easy and productivity is improved. Further, the thickness of the front end portion 12 and the rear end portion 13 can be 5 mm or less as in the conventional case.
Further, since the thickness of the inner peripheral side and the outer peripheral side of the hook body is the same as the thickness of the tip portion and the rear end portion of the conventional hook for the safety belt, twist deformation due to heat treatment is likely to occur, and correction processing is required. Met.
On the other hand, in the hook according to the present embodiment, the first ridge on the inner peripheral side of the portion between the tip portion 12 and the rear end portion 13 of the hook body 1 is thicker than the tip portion 12 and the rear end portion 13. Since the portion 14 is provided, deformation due to heat treatment can be suppressed. Further, the effect of suppressing deformation due to heat treatment can be obtained only by providing the first raised portion 14 on the inner peripheral side, but if only the first raised portion 14 is provided, the main body 10 is opened in the opening direction due to the cooling shrinkage of the thick portion. Is easily deformed. Therefore, in this embodiment, the second raised portion 15 is provided on the outer peripheral side to suppress deformation in the opening direction. Further, as in the present embodiment, the cross-sectional shape of the second raised portion is substantially trapezoidal or substantially triangular, and the inner thickness 15Ti of the second raised portion 15 is larger than the outer thickness 15To of the second raised portion 15. Then, since the outside of the second raised portion 15 tends to be cooled, deformation can be further suppressed. As a result, the straightening process after the heat treatment can be omitted or simplified, the productivity can be improved, and the cost can be reduced.

Further, depending on the site environment, it may be difficult to hang the hook vertically to the object to be secured, and the hook may have to be hung laterally or diagonally to the object to be locked. In this case, when the worker is suspended in the air due to a fall accident or the like, the hook has strength in the vertical direction, but the strength may not be sufficient for the force to bend the hook in the lateral direction. May bend in the lateral direction, and in particular, depending on the direction of the force that pulls the hook, the possibility that the hook will come off from the locked object due to the bending in the lateral direction is not zero. In the conventional hook structure, in order to cope with the bending strength in the side surface direction, there is no choice but to increase the wall thickness of the hook body, and as a result, the mass of the hook increases and the usability deteriorates. It was difficult to cope with the bending strength. Further, in order to cope with the bending strength in the side surface direction, it is conceivable to secure the strength by making the cross-sectional shape of the strong portion of the hook body trapezoidal. However, if the hook body has a trapezoidal cross-sectional shape and an attempt is made to reduce the mass, the length of the lower side (inside of the hook body) of the trapezoidal cross-sectional shape becomes restricted, and the meat on the outside of the hook body, which is the upper side, is restricted. Since the difference from the thickness remains small, there is some improvement in strength, but as a result, the bending direction only changes, and it cannot be said to be a fundamental solution. Further, if the hook body is designed with the cross-sectional shape as a trapezoid and the strength is the center, the mass must be heavy.
On the other hand, in the hook according to the present embodiment, the first raised portion 14 is provided on the inner peripheral side of the hook main body 1, the second raised portion 15 is provided on the outer peripheral side, and the cross-sectional shape of a part of the second raised portion 15 is further formed. Is substantially trapezoidal or substantially triangular, and the inner thickness 15Ti is made larger than the outer thickness 15To of the second raised portion 15, so that the mass remains the same or less than the conventional hook, and the tensile direction is maintained. Not only the strength of the but also the strength in the bending direction can be greatly improved. Therefore, the safety can be improved as compared with the conventional hook.

Further, in order to further enhance the above-mentioned effect, the inner thickness 15Ti of the second raised portion 15 is preferably 1.3 times or more and 1.6 times or less, and 1.4 times or more 1. It is more preferable to make it 5 times or less.

The hook body and hook of the present invention can be used as a safety belt to prevent a worker from falling or falling.

1 Hook body 10 Main body 11 Curved part 12 Tip part 13 Rear end part 14 First raised part 14T Thickness of first raised part 15 Second raised part 15T Thickness of second raised part 15Ti Thickness inside second raised part 15To No. (Ii) Thickness of the outside of the raised portion 16 Recessed portion 16T Thickness of the recessed portion 17 Inclined portion 20 Rope anchoring body 20T Thickness of the rope anchoring body 21 Tethering portion 22 Third raised portion 22T Thickness of the third raised portion W Main width

Claims (6)

A hook body used for a hook connected to the other end of a rope whose one end is connected to a safety belt.
A rope anchoring body having a anchoring portion to which the rope is anchored,
It has a main body extending from the rope anchoring body and curved so as to be folded back toward the rope anchoring body by a curved portion.
The main body is provided with a first raised portion on the inner peripheral side, a second raised portion on the outer peripheral side, and a recess between the first raised portion and the second raised portion from the tip portion to the rear end portion. ,
The thickness of the recess is smaller than the thickness of the tip and the rear end.
The thickness of the second raised portion is equal to or greater than the thickness of the tip portion and the rear end portion.
The thickness of the first raised portion is larger than the thickness of the second raised portion.
At least a part of the second raised portion 15 is a hook body for a safety belt, characterized in that the cross-sectional shape is substantially trapezoidal or substantially triangular, and the inner thickness 15Ti is larger than the outer thickness 15To. The hook body for a safety belt according to claim 1, wherein the inner thickness 15Ti of the second raised portion 15 is 1.3 times or more and 1.6 times or less the outer thickness 15To. The thickness of the first raised portion is characterized in that it gradually increases from the rear end portion of the main body to the curved portion and gradually decreases from the curved portion of the main body to the tip portion. The hook body for the safety belt according to claim 1 or 2. The hook body for a safety belt according to any one of claims 1 to 3, wherein the first raised portion and the concave portion are connected via an inclined portion. The anchoring portion of the rope anchoring body has a circular opening and has a circular opening.
The hook body for a safety belt according to any one of claims 1 to 4, wherein a circular third raised portion is provided around the opening. The hook body for the safety belt according to any one of claims 1 to 5, and the hook body.
A hook for a safety belt, characterized in that the hook body is provided with an outer stopper that prevents the hook body from coming off from the locked object.

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