JPH0313609Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The invention of the present application is primarily concerned with improving a safety hook that is attached to a safety belt for fall prevention when working at heights.

(Prior Art) This type of hook that has been used in the past is as disclosed by the applicant in Utility Application No. 107321/1982, and is based on an L-shaped latching part of the safety cap with a spring attached to the shaft provided on the opening/closing cap. This was to prevent accidental release.

(Problem that the invention aims to solve) However, in actual use, there are situations that are not taken into account at the time of design. When used in conjunction with the belt, various miscellaneous tools are attached to the belt, and insulated cover tool bags are hung near the work area on the utility pole, and tools are lifted from below the utility pole. Ropes also pass between the worker and the pole, and in such a work environment, it is impossible to do anything while working with the safety belt rope wrapped around the pole and the hook hooked to the ring of the belt located at the waist. If, by chance, an object presses the opening/closing cap, and at the same time another object presses the safety cap, the engagement between the two will be released, the opening/closing cap will open easily, and the worker will then When moving, there was a risk that the hook would come off the ring and cause a fall.

(Means for Solving the Problems) Therefore, the present invention eliminates the above-mentioned situation by changing the structure of engagement between the opening/closing cap and the safety cap. In other words, instead of receiving the shaft of the opening/closing cap in the L-shaped cutout of the safety cap, by providing a concave engaging part, the shaft of the cap that is pushed will fit into the concave groove without the operator noticing. In other words, the side wall prevents the safety cap from rotating, and therefore also prevents the opening/closing cap from rotating, thereby solving the above problem.

(Example) A hook body 3 having a hook part 1 at the tip and a ring part 2 at the base end is provided with an opening/closing cap 4 for the hook part 1 which is biased by a spring on the abdomen, and is opened and closed at approximately the center of the hook body 3. A long hole 31 is bored on an arc centered on the pivot shaft 41 of the cap 4, and both side walls 42 of the opening/closing cap 4,
A portion of the cap 42 is bulged outward 43, 43, and a spring holding portion 45 is provided on the intermediate piece 44, and the opening/closing cap 4 is located at the upper end of the elongated hole 31.
The shaft 5 is attached to the bulging portions 43, 43 of the side walls 42, 42.
is provided through the shaft 5, and both ends of the shaft 5 are connected to both side walls 42,
42 and the heads 51, 51 are caulked on the outside.
, the end surface is shaped like a U-shape, the whole is formed into a substantially L-shape, and both side pieces 61, 61 are provided, and the side pieces 6
Protrusions 62, 62 are provided at the tips of 1, 61, and concave hooks 7, 7 are provided below them. Further, a safety cap 6 having a spring holding portion 64 on an intermediate piece 63 serving as a pressing portion is attached to the back of the hook body 3 facing the opening/closing cap 4, and the end hooking portions 7, 7 of the safety cap 6 are Bulge 4 of opening/closing cap 4
This safety hook has a structure in which it engages with the shaft 5 of the opening/closing cap 4 between the side walls 42, 42 of the portions 3 and 43 and the hook body 3, and serves as a safety device for preventing the cap from opening. The proposed hook is used by tying one end of the rope of a safety belt for fall prevention to the ring part 2, and when the opening/closing cap 4 is opened, the hook opening 3 of the hook part 1 is opened.
When fitting an object inside, first press and rotate the safety cap 6 in the direction of arrow A. The end hooks 7, 7 will come off the shaft 5 of the opening/closing cap 4, and then move the opening/closing cap 4 in the direction of the arrow A. When pressed and rotated in direction B, the hook opening opens and locking becomes possible.

(Effects of the invention) As described above, by using the hook of the present invention, the shaft provided on the opening/closing cap and the safety cap are engaged by a recessed part instead of an L-shaped part as in the conventional case. Therefore, even if a weak impact force is applied to the safety cap while applying pressure to the opening/closing cap, the shaft 5 of the opening/closing cap 4 will be supported by the side wall of the concave groove, and the safety cap 6 will not rotate. This also avoids the conventional situation where the cap slips on a straight surface and becomes unlatched, causing the cap to open and causing a fall.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of the project.
Figure 2 is a plan view. FIG. 3 is a front view of another embodiment. Symbols in the diagram: 1... hook part, 2... ring part, 3...
Hook body, 4...Opening/closing cap, 5...Shaft, 6
... Safety cap, 7 ... Latching part, 8 ... Latching groove, 31 ... Long hole, 32 ... Hook mouth, 41 ... Pivoting shaft, 42 ... Side wall, 43 ... Bulging, 44 ,63...
... intermediate piece, 45, 64 ... holding part, 51 ... head, 61 ... side piece, 62 ... protrusion part.

Claims (1)

[Scope of utility model registration request] A hook body 3 having a hook portion 1 at the tip and a ring portion 2 at the base end is provided with an opening/closing cap 4 for opening and closing the hook portion 1 equipped with a spring on the abdomen thereof, and a shaft 5 bridging on both sides of the opening/closing cap 4. A safety device for preventing the opening/closing cap 4 from opening is established by engaging the end hooking part 7 of a safety cap 6 with an approximate U-shape on the end face provided on the back of the hook body 3 facing the opening/closing cap 4 by the bias of a spring. With the hook set, the latch 7 of the safety cap 6
A hook for a fall prevention safety belt, characterized in that a concave or V-shaped latching groove 8 is provided to correspond to and receive the shaft 5 of the opening/closing cap.