JP2002103252A - Safety cord for carrying tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent tangling of a safety cord by thinning twining parts to prevent lowering of an untwisting function due to contact of the untwisting parts with each other even in the case of installing a large number of tools. SOLUTION: This safety cord for carrying a tool is furnished with a body side engaging fixture to be engaged with clothes of a carrier, a tool side engaging fixture 5 to be engaged with tools, a connecting cord 3 to connect the body side engaging fixture and the tool side engaging fixture to each other and a pair of untwisting fittings 2, 4 to untwine by being connected to both end sides of the connecting cord, the body side engaging fixture and the tool side engaging fixture have rod type projected engaging parts 13, 53 on the untwisting fitting side and are furnished with ring recessed parts 13a, 53a on roots of the projected engaging parts, the untwisting fittings are roughly cylindrical and have bottom parts 21a, 41a provided with a through-hole to pass the connecting cord through it on one end and are furnished with ring engaging parts 22, 42 to be opened and engaged with the engaging fixture on the other end, and the projected engaging part is inserted into an open port of the untwisting fitting, deformed by applying external force on the ring type engaging part and its part is fitted in the ring recessed part and engaged with it free to axially rotate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety strap for carrying a tool, and more particularly to a safety strap for carrying a tool in consideration of workability when a large number of tools are simultaneously attached to a waist.

[0002]

2. Description of the Related Art FIG. 8 shows a typical example of a conventional safety strap for carrying a tool. This kind of safety cord, as shown in FIG.
A body-side engaging member 61 that can be engaged with the D-shaped bracket 20 attached to the waist belt 10, a tool-side engaging member 65 that can be directly or indirectly engaged with a part of the tool 70, A connecting cord 63, a body-side untwisting tool 62 for connecting between the connecting cord 63 and the body-side engaging tool 61,
It comprises a body-side untwisting tool 64 that connects between the connecting cord 63 and the tool-side engaging tool 65.

The body-side untwisting device 62 and the tool-side untwisting device 64 are used to untwist the connecting cord 63 generated during or before and after using the tool 70. 3
Reference numeral 0 denotes a leather bag for holding a tool, and reference numeral 71 denotes a metal fitting attached to the tool 70 to facilitate engagement of the tool carrying safety string.

[0004]

Generally, on a construction site, tool management is regarded as important. Particularly when working at heights, tools to be used in any case must be used by workers to prevent accidental dropping of tools during work. It is essential to use a safety cord for carrying tools so that you can stay away from your body. On the other hand, the number of tools that need to be carried at the same time in order for the worker to perform a series of work varies depending on the work content, but is generally three or more in general. Thus, three or more hooks of the body-side engaging device are attached to the D-shaped bracket 20 of the waist belt 10.

[0005] However, the conventional tool carrying safety cord has a large engaging tool and a twisting tool, and in particular, the twisting tool travels sideways in an annular shape as shown in FIG. Therefore, it is pressed against the body or the untwisting devices overlap each other, preventing free rotation, not only losing the essential untwisting function, but also being caught by unexpected protrusions around because the metal fitting is in the shape of a ring There was a problem that there was a danger.

An object of the present invention is to solve such a problem and to entangle the safety cord without impairing the function of untwisting the safety cord even when many tools need to be mounted on the waist of the worker at the same time. An object of the present invention is to provide a tool portable safety cord which is more excellent in safety than ever before by improving workability and enhancing the durability of the connecting cord.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a tool-portable safety cord according to the present invention is provided with a body-side engaging device (1) for engaging with clothing such as a waist belt of a tool carrier. )
And a tool-side engaging tool (5) for engaging a part of tools.
And the body-side engaging device (1) and the tool-side engaging device (5)
And a pair of untwisting tools (2, 4) coupled to both ends of the connecting cord (3) for untwisting the connecting cord (3). A safety strap for carrying a tool, wherein the body-side engaging tool (1) and the tool-side engaging tool (5) have a rod-shaped projecting engaging portion (13 or 53) on the untwisting tool side. A ring-shaped recess (1) is located near the base of the engagement portion (13 or 53).
3a or 53a), and the untwisting device (2,
4) is a substantially cylindrical shape, and a through hole (21b or 41b) through which the connecting cord (3) is passed at one end on the connecting cord side.
There is a bottom portion (21a or 41a) provided with a ring-shaped engaging portion (22) that is open at the other end and engages with the body-side engaging tool (1) or the tool-side engaging tool (5). Or 42), and the protruding engagement portion (13 or 13) of the body-side engagement tool (1) or the tool-side engagement tool (5) is provided at each opening of the pair of untwisting tools (2, 4). 53) is inserted, an external force is applied to the ring-shaped engaging portions (22, 42) to deform them into a predetermined shape, and a part of the engaging portions (22, 42) is partially formed in the ring-shaped recess (13).
a or 53a), the body-side engaging tool (1) or the tool-side engaging tool (5) is freely rotatable around an axis in each of the pair of untwisting tools (2, 4). It shall be constituted by engaging.

In addition to the above, the connecting code (3)
Comprises a core (31) made of a metal wire bundle, and a covering part (32) for covering the periphery of the core (31) and adjusting the shape of the whole cord, and each through-hole of the untwisting tool (2, 4). (21b or 41b) through one end or the other end of the connecting cord (3) and the bottom (21a or 4b).
The core (31) exposed by removing the covering portion (32) of the cord (3) coming out of the inside of 1a) is attached to a cylindrical metal (33).
And the cylindrical metal (33) is deformed and fixed by an external force, so that the end of the core (31) does not come out of the through hole (21b or 41b) and the pair of twists is formed. The return tools (2, 4) are configured to engage with both ends of the connection cord (3).

[0009]

Next, an embodiment of the present invention will be described.
This will be described in detail with reference to the drawings and the like. FIG. 1 is a view showing a state of a manufacturing process (a state before a body-side engaging tool and a tool-side engaging tool are engaged with a untwisting tool, in order to explain the features of the structure of the tool carrying safety cord of the present invention. FIG. FIG.
In order to further explain the structure of the untwisting device, the body-side untwisting device of the embodiment of FIG. 1 was cut along a plane including its center line and parallel to the yz axis shown in FIG. It is the perspective view shown in the state.

As shown in FIG. 1, the tool portable safety cord of the present invention includes a body-side engaging device 1 that can be engaged with a body accessory such as a waist belt of an operator, and a tool (not shown) to be carried. A tool-side engaging tool 5 that can be directly or indirectly engaged with a part of the body, a connecting cord 3, a body-side untwisting tool 2 that connects between the connecting cord 3 and the body-side engaging tool 1, It comprises a body-side twisting-back tool 4 for connecting between the connecting cord 3 and the tool-side engaging tool 5. The body-side untwisting tool 2 and the tool-side untwisting tool 4 are for untwisting the connecting cord 3 generated during or before and after using the tool.

The body side engaging device 1 is a waist belt 1 shown in FIG.
The hook portion 11 is engaged with a D-shaped fitting 20 attached to the same position as the D-shaped fitting 20 and a bar-shaped projecting engaging portion 13 protruding from the base 12 thereof. Reference numeral 11a is a fastener for preventing the hook 11 from coming off the attached D-shaped fitting 20 or the like. At the base of the protruding engagement portion 13, a ring-shaped concave portion 13a having a smaller diameter than the tip portion is provided.

The tool-side engaging device 5 has exactly the same structure as the body-side engaging device 1 in this embodiment, and only the hook portion 51 of the body-side engaging device 1 is different from the body-side engaging device 1. Hook part 11
It is slightly smaller depending on the tool used. The hook 51 includes a hook portion 51 and a bar-shaped projecting engagement portion 53 protruding from a base 52 of the hook portion. Reference numeral 51a denotes a fastener for preventing the hook portion 51 once hooked on some tool (not shown) from coming off. At the base of the protruding engagement portion 53, a ring-shaped concave portion 53a having a smaller diameter than the distal end portion is provided.

In the present embodiment, the body-side untwisting device 2 and the tool-side untwisting device 4 have exactly the same shape and the same dimensions. The following description is made for the body-side untwisting device 2, and the reference numerals of the corresponding parts of the tool-side untwisting device 4 are shown in parentheses. As shown in FIGS. 1 and 2, the untwisting device has a substantially cylindrical tubular shape with the body-side engaging device 1 (tool-side engaging device 5) side open and a bottom 21a (41a) on the opposite side. A portion 21 (41) and a ring-shaped engaging portion that is deformed by applying pressure from the outside in the manufacturing process and is fitted into the ring-shaped recess 13a (53a) of the body-side engaging device 1 (tool-side engaging device 5). 22 (42) and the ring-shaped engaging portion 22
(42) and a pair of left and right engagement support portions 23, 24 (43, 44) for integrally connecting and fixing the (42) to the tubular portion 21 (41).

The cylindrical portion 21 (41) and the ring-shaped engaging portion 22
The inner diameter of (42) is the same, and is slightly larger than the outer diameter of the projecting engagement portion 13 (53). Further, the ring-shaped engaging portion 2
The axial length of 2 (42) is smaller than the axial length of the ring-shaped groove 13a (53a) of the body-side engaging device 1 (tool-side engaging device 5).

The connecting cord 3 is formed by twisting a large number of thin stainless steel wires to form a core 31 having sufficient flexibility and necessary tensile strength, and covering the core 31 with urethane to form a covering portion 32. Thus, a required shape including a spiral portion as shown in FIG. 1 is maintained. Core 3
FIG. 3 shows a part of 1 and the covering portion 32.

FIGS. 3 to 6 are explanatory views showing a case where the connecting cord 3 and the body side engaging device 1 are connected to the body side unwinding device 2 in the procedure for assembling the respective portions of the embodiment of FIG. It is. FIG. 3 shows a state before these connections are made. However, the connection cord 3 is shown in a state where the covering portion 32 around the leading end of the core 31 is removed by a required length.

First, the connecting cord 3 is engaged with the body-side untwisting tool 2. As shown in FIG. 4, the connecting cord 3 is inserted through the bottom 21a of the tubular portion 21 of the body-side untwisting tool 2 from the end. Through the hole 21b, the exposed core 31 is attached to the cylindrical stopper 3
3 through the center hole 33a. Thereafter, a pressure P ₁ is applied from the outside of the stopper 33 as shown in FIG.
Is fixed to the core 31 of the connecting cord. Thus, even if the connecting cord 3 is pulled rightward in the figure, the state shown in FIG. 5 is obtained, and the connecting cord 3 is restricted by the inner surface of the bottom 21a of the body-side untwisting tool 2 and does not come off.

Next, the body-side engaging device 1 is attached to the body-side untwisting device 2.
First, as shown in FIG.
Of the projecting engagement portion 13 of the body
Into the engagement portion 22. Ring-shaped engagement part at this time
22 is larger than the diameter of the tip of the rod-shaped engagement portion 13.
Then, insert the rod-shaped engagement portion 13 with sufficient play to the base.
Is entered. Then, as shown in FIG.
The direction perpendicular to the mounting direction of 3, 24 (upper side in FIG. 6)
From below) toward the center axis of the ring-shaped engagement portion 22
Force P _Two To deform the ring-shaped engaging portion 22.

At this time, since the axial length of the ring-shaped engaging portion 22 is shorter than the axial length of the ring-shaped groove 13a, the ring-shaped engaging portion 22 is easily deformed without hitting anywhere. Into the groove 13a. That is, the cross section of the ring-shaped engaging portion 22 is deformed from a circular shape to an elliptical shape. Bite into. In this state, the body-side engaging device 1 and the body-side untwisting device 2 cannot be separated from each other, and the ring-shaped engaging portion 22 and the ring-shaped groove 13 are not separated.
Since a is freely rotatable around the axis, even if the connecting cord 3 is twisted, it functions to immediately return the twist.

As described above, the connecting cord 3 is
Although the case where the body side engaging device 1 is connected to the
The same procedure is used for connecting the connecting cord 3 and the tool-side engaging tool 5 to the tool-side untwisting tool 4.
The body-side untwisting device 2, the connecting cord 3, the body-side untwisting device 4, and the tool-side engaging device 5 can be connected in this order to complete the product.

The present invention is not limited to the embodiment described above, but can be variously modified or changed.
These are also within the equivalent range of the present invention. For example, the structure and shape of the hook portions of the body-side engaging tool and the tool-side engaging tool may be different from those shown in the drawings. Further, the shape of the untwisting tool may be different from that shown in the figure.

[0022]

According to the present invention, the body-side engaging tool and the tool-side engaging tool have a rod-shaped projecting engaging portion on the untwisting device side, and the projecting engaging portion is located near the base of the projecting engaging portion. It has a ring-shaped recess, the untwisting tool is substantially cylindrical, and has a bottom provided with a through-hole at one end on the connection cord side for passing the end of the connection cord, and the other end is open and the body side A ring-shaped engaging portion that engages with the engaging tool or the tool-side engaging tool, and wherein the body-side engaging tool or the tool-side engaging tool is provided at each opening of the pair of untwisting tools. Inserting the mating portion, applying an external force to the ring-shaped engaging portion, deforming the ring-shaped engaging portion into a predetermined shape, and fitting a part of the engaging portion into the ring-shaped concave portion, thereby untwisting the pair of untwists. The body-side engaging tool and the tool-side engaging tool are engaged with each of the tools so as to freely rotate around the axis. Therefore, the part of the untwisting device can be made much thinner than before, and even when many tools need to be attached to the waist of the worker at the same time, the safety cord does not become entangled and There is an effect that the function can be sufficiently exhibited, and workability and safety can be enhanced.

The connecting cord includes a core made of a bundle of metal wires and a covering portion that covers the periphery of the core and adjusts the shape of the entire cord. One end of the connecting cord is inserted into each through hole of the untwisting tool. Alternatively, the core is formed by covering the core exposed through removal of the covering part of the cord protruding inside the bottom part through the other end and deforming and fixing the cylindrical metal by an external force. Of the pair of untwisting tools is engaged with both ends of the connecting cord so that the ends of the untwisting tools do not come out of the through holes. The fixation has the effect that the durability of the connecting cord can be increased.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view of an embodiment of the present invention.

FIG. 2 is an explanatory view (perspective view) cut along a plane including a center line of the untwisting tool of FIG. 1;

FIG. 3 is an explanatory view (a cross-sectional view just before assembling) showing a procedure for assembling each part.

FIG. 4 is an explanatory view showing a procedure for assembling the respective parts (twisting tool and connection cord connection).

FIG. 5 is an explanatory view showing a procedure for assembling the respective parts (a projecting engagement portion of a body-side engagement device is inserted into a untwisting device).

FIG. 6 is an explanatory view showing a procedure for assembling each part (connection of a body side engaging tool and a untwisting tool).

FIG. 7 is an explanatory view (perspective view) showing a state in which the body side engaging device and the untwisting device are joined together by cutting out a part of the untwisting device.

FIG. 8 is a perspective view showing an example of usage of a conventional tool-portable safety cord.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body side engaging tool 2, 4 Twist return tool 3 Connecting code 5 Tool side engaging tool 11, 51 Hook part 13, 53 Projection engaging part 13a, 53a Ring-shaped recessed part 21, 41 Cylindrical part 22, 42 Ring-shaped Engaging part 23, 24, 43, 44 Engaging support part 31 Core 32 Coating

Claims (2)

[Claims] 1. A body-side engaging device for engaging with clothing such as a waist belt of a tool carrier, a tool-side engaging device for engaging a part of tools, and the body-side engaging device. Tool carrying safety cord comprising: a connecting cord for connecting the fitting and the tool-side engaging tool; and a pair of untwisting tools connected to both ends of the connecting cord for untwisting the connecting cord. Wherein the body-side engaging tool and the tool-side engaging tool have a bar-shaped projecting engaging portion on the untwisting device side, and have a ring-shaped recess near the base of the projecting engaging portion. The return tool has a substantially cylindrical shape, and has a bottom provided with a through hole at one end on the connection cord side to allow the connection cord to pass therethrough,
The other end is open and includes a ring-shaped engaging portion that engages with the body-side engagement tool or the tool-side engagement tool. The body-side engagement is provided at each opening of the pair of untwisting tools. Tool or the protruding engagement portion of the tool-side engagement tool is inserted, and an external force is applied to the ring-shaped engagement portion to deform it into a predetermined shape, and a part of the engagement portion is inserted into the ring-shaped recess. A tool carrying safety string, wherein the body-side engaging tool and the tool-side engaging tool are engaged with each of the pair of untwisting tools so as to freely rotate around an axis by being fitted. 2. The connecting cord comprises a core made of a metal wire bundle, and a covering part which covers the periphery of the core and adjusts the shape of the whole cord. The connecting cord is provided in each through hole of the pair of untwisting tools. Through one end or the other end of the cord, the covering portion of the cord protruding inside the bottom is removed, and the exposed core is covered with a tubular metal fitting, and the cylindrical fitting is deformed and fixed by external force, 2. The tool carrying safety strap according to claim 1, wherein the pair of untwisting tools is engaged with both ends of the connection cord so that an end of the core does not come out of the through hole. 3.