JP2002262919A - Safety string for preventing tool from falling down - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a string for preventing a tool from falling down, which is enhanced in engaging strength between an engaging piece in the body side or the tool side and a twist returning piece while rotation around an axis is allowed and prevents the engaging piece in the body side or tool side from coming off the twist returning piece by drawing force. SOLUTION: Press fitting type twist returning pieces (2, 4) are equipped respectively between an engaging piece 1 in the body side and a connection code 3 and an engaging piece 5 in the tool side and the connection code 3. Projecting engaging parts (13, 53) are equipped on the engaging piece 1 in the body side or the engaging piece 5 in the tool side via ring shape recess parts (13a, 53a). Engaging members (22, 42) are equipped on twist returning pieces (2, 4) so that the engaging piece in the body side or the engaging piece in the tool side are engaged rotatably around the axis. Slit grooves (11a, 42a) are equipped on the engaging members (22, 42) so that the grooves can be opened by press fitting force upon press fitting the projecting engaging parts (13, 53). Ring shape engaging projections (22b, 42b) are equipped on the edge parts to the inner diameter side to block opening of the projecting engaging parts (13, 53) by drawing-out force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety cord for carrying a tool in consideration of workability when a large number of tools are simultaneously attached to a waist and, in particular, to prevent such tools from dropping off during carrying. The present invention relates to a safety cord for preventing a tool from falling, which can be prevented.

[0002]

2. Description of the Related Art Conventionally, as a typical safety cord for carrying a tool, as shown in FIG. 7 (a), a body side member which can be engaged with a D-shaped bracket 20 attached to a waist belt 10 is used. A fitting 61, a tool-side engaging tool 65 that can be directly or indirectly engaged with a part of the tool 70, a connection cord 63 kept in a spiral shape, for example, and a connection cord 6.
It comprises a body-side untwisting tool 62 for connecting between the body 3 and the body-side engaging tool 61, and a tool-side untwisting tool 64 for connecting between the connection cord 63 and the tool-side engaging tool 65. These body-side untwisting device 62 and tool-side untwisting device 64
Is for returning the twist of the connecting cord 63 generated during or before and after using the tool 70. Note that 30
Is a leather bag for holding the tool 70, and 71 is a metal fitting attached to the tool 70 to facilitate engagement of a tool carrying safety string.

The connecting cord 63 is formed by twisting a large number of thin stainless steel wires to form a wire core having sufficient flexibility and necessary tensile strength, and covering the wire core with an elastic material such as urethane rubber. By maintaining the shape, the required shape including the spiral portion is maintained. As shown in FIG. 7 (b), the end of the connecting cord 63 is connected to the body-side engaging tool 61 or the tool-side engaging tool 65 by connecting an aluminum or brass caulking tube 80 in advance. After passing through the end of 63, the leading end of the connecting cord 63 is passed through a ring-shaped untwisted portion (62, 64) provided on the body-side engaging tool 61 or the tool-side engaging tool 65, and is then folded back to the crimping tube 80 again. After the insertion, as shown in FIG. 7C, the caulking tube 80 is compressed to caulk and join the two connecting cords 63 together. At this time, caulking tube 80
In a crimped state, it is painful to hold it in the hand when holding it in the hand, and the hand may be injured. For this reason, the crimping tube 80 is covered with a heat-shrinkable tube 81 for safety.

[0004]

However, with such a conventionally proposed safety strap for carrying a tool, the number of manufacturing steps is large, automation is difficult, and cost reduction is difficult.
Further, the shape is bulky, and it is difficult to control the bonding strength by caulking. That is, although a tensile breaking strength is obtained as a result of bonding by caulking, according to the conventional structure, a coating material such as urethane rubber is compressed and deformed by a caulking tube, so that a tensile load due to deformation resistance, a wire core and urethane rubber are obtained. The sum of the frictional forces with the above becomes the tensile breaking strength. However, with a combination of an elastic material such as urethane rubber and a metal caulking pipe, it is difficult to control the degree of caulking, so use a long caulking pipe to finish it to a strength that can not be broken by human power in consideration of safety. I have. Originally, this kind of safety cord for preventing the tool from falling, unlike the lifeline, does not mean that it should be strong, but when the tool 70 is caught in a machine or pulled by a vehicle etc. It is desirable that the connection strength is such that the worker can stomach on itself and break the safety cord, but this is difficult with the conventional structure, and the connection strength is about 70 to 90 kg.

Accordingly, the present invention has been made in view of the above-mentioned various circumstances, and it is easy to control the connection strength by caulking a stopper for engaging the connecting cord with the untwisting tool. In addition, adjustments can be made by selecting the material of the stopper, and each step such as a folding step of a connecting cord, a compressing step of a crimped pipe having two connecting cords inserted, and a heat shrink tube inserting and heating step as in the related art. Can be removed, assembling is easy and costs are reduced.
The size of the untwisted part can be smaller than before, it is easy to grasp, the waist can be organized even if multiple pieces are used, and the design can be made a neat and smart shape, and in addition, the rotation around the axis is free However, by increasing the strength of engagement between the body-side engaging tool or the tool-side engaging tool and the untwisting tool, the pulling out of the body-side engaging tool or the tool-side engaging tool with respect to the untwisting tool is performed. An object of the present invention is to provide a safety cord for preventing a tool from falling off, which can prevent detachment.

[0006]

According to the present invention, in order to achieve the above object, the present invention relates to a body side engaging tool 1 which engages with a wearer of a tool carrier and a part of tools. In a safety cord for preventing a tool from dropping, which is formed by joining a mating tool-side engaging tool 5 with a connecting cord 3, a body-side engaging tool 1 and a connecting cord 3
, And between the tool-side engaging member 5 and the connection cord 3 are press-fitting fixed type untwisting tools (2, 4). The body-side engaging tool 1 or the tool-side engaging tool 5 has a bar-shaped projecting engaging portion (13, 53) on the untwisting tool connecting side, and the projecting engaging portion (13, 53) is close to the base. Is provided with a ring-shaped concave portion (13a, 53a), and the protruding engaging portion (13, 53) is press-fitted into the opening of the untwisting tool (2, 4) to be engaged with the body-side engaging tool 1 or the tool side. The untwisting tool (2, 4) may be provided with a locking member (22, 42) so that the engaging tool 5 is rotatably engaged around the axis. The locking member (22, 42) includes a protruding engagement portion (1).
3, 53), and has an outer diameter such that the locking member (22, 42) itself is expanded by a pushing force at the time of press-fitting of the protruding engagement portion (13, 53). It can be formed into a substantially C-ring shape having slit split grooves (22a, 42a) from the portion to the inner diameter portion. On the upper edge side of the inner diameter portion of the locking member (22, 42),
The expansion of the locking members (22, 42) themselves due to the pull-out force of the protruding engagement portions (13, 53) of the body-side engagement tool 1 or the tool-side engagement tool 5 engaged and held in the inner diameter portion. A ring-shaped locking projection (22b, 42b) can be provided to be suspended and held on the inner peripheral side of the opening of the untwisting tool (2, 4) in order to prevent it. At the symmetric position of the locking members (22, 42), untwisting tools (2, 4)
A pair of reinforcing rib-shaped flange portions (22c, 42c) may be extended to conform to the outer shape of (1). Locking projections (22b, 42) communicating with the inner diameter portion
The inner peripheral side of b) may be provided with chamfered portions (22d, 42d) with which the corner portions of the protruding engagement portions (13, 53) abut. The untwisting device (2,
4) is a substantially cylindrical portion (21, 4) slightly diverging.
1) is formed, and when the body-side engagement tool 1 or the tool-side engagement tool 5 is assembled on the large-diameter side of the cylindrical portion (21, 41), the locking member (22, 42) is used. Untwisting tool (2,
4) Side windows (23, 4) that can be inserted from the peripheral side
3), and a through hole (24, 44) through which the connecting cord 3 passes can be provided on the small diameter side of the cylindrical portion (21, 41).

In the safety cord for tool drop prevention according to the present invention configured as described above, the projecting engagement portions (13, 53) of the body-side engagement tool 1 or the tool-side engagement tool 5 are untwisted ( By press-fitting into the opening ports of (2, 4), the protruding engagement portions (13, 53) are once engaged with the locking members (22,
42), the body-side engaging tool 1 or the tool-side engaging tool 5 is untwisted by pushing the inner diameter part into the ring-shaped recessed part (13a, 53a) after expanding the inner diameter part into the ring-shaped concave part (13a, 53a). The tool (2, 4) is rotatably engaged around the axis.

The ring-shaped locking projections (22b, 42b) provided on the upper edge side of the inner diameter portion of the locking members (22, 42) are hooked and held on the inner peripheral side of the opening of the untwisting tool (2, 4). The engagement members (22, 42) themselves are expanded by the pull-out force of the protruding engagement portions (13, 53) of the body-side engagement tool 1 or the tool-side engagement tool 5 engaged and held in the inner diameter portion. Opening is prevented by engagement of the inner circumference of the opening of the untwisting tool (2, 4).

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the tool drop prevention safety cord of the present invention includes a body-side engaging tool 1 that can be engaged with a body accessory such as a waist belt of an operator, and a part of a tool to be carried. A tool-side engaging tool 5 that can be directly or indirectly engaged, a connecting cord 3, and a connecting cord 3
Body-side untwisting device 2 for connecting between body and body-side engaging device 1
And a tool-side untwisting tool 4 for connecting between the connecting cord 3 and the tool-side engaging tool 5. The body-side untwisting devices 2 and 4 are used to untwist the connecting cord 3 generated during or before and after using the tool. The untwisting tools (2, 4) are forcibly press-fitted with the body-side engaging tool 1 or the tool-side engaging tool 5 into the opening of the body-side engaging tool 1 or the tool as described later. It is formed as a press-fitting fixed type structure that can be mounted with one touch so that the side engaging member 5 is rotatably engaged around the axis.

The body side engaging device 1 is a waist belt 1 shown in FIG.
A hook portion 11 that engages with the same position as the D-shaped bracket 20 attached to the hook 0 and a bar-shaped projecting engagement portion 13 that protrudes from the base 12 thereof. A ring-shaped recess 13a having a small diameter is provided. 11a is the attached D-shaped bracket 20.
It is a fastener for preventing the hook portion 11 from coming off from the like.

In the present embodiment, the tool-side engaging device 5 has exactly the same structure as the body-side engaging device 1, and the hook portion 51 is different from the body-side engaging device 1 only in the hook portion of the body-side engaging device 5. The size is made one size smaller according to the tool used from the part 11. The tool-side engaging tool 5 includes a hook portion 51 and a bar-shaped projecting engaging portion 53 protruding from a root 52 thereof. A ring-shaped concave portion 53a having a smaller diameter than the tip portion is provided at the root of the projecting engaging portion 53. Is provided. Reference numeral 51a is a fastener for preventing the hook portion 51 once hooked somewhere on the tools from coming off.

As shown in FIG. 1, the body-side untwisting tool 2 and the tool-side untwisting tool 4 are formed by injection molding of a synthetic resin material such as polyacetal resin or the like, for example. , 41, and
The body side untwisting tool 2 is slightly larger than the tool side untwisting tool 4 according to the body side engaging tool 1. In addition, cylindrical part 2
At the time of assembling the body-side engaging tool 1 or the tool-side engaging tool 5, locking members 22, 42, which will be described later, are unfolded to the left and right symmetrical positions on the large diameter side. Side windows 23 and 43 are provided so as to be inserted from the peripheral side, and through holes 24 and 44 are provided on the small diameter side of the cylindrical portions 21 and 41 to allow the connection cord to pass therethrough. Further, the through holes 24, 4 of the cylindrical portions 21, 41 are provided.
A ring-shaped step 25 (not shown on the tool-side untwisting tool 4 side) is provided on the inner peripheral surface on the side closer to the fourth side for locking a stopper 33 described later. Although the tool-side untwisting tool 4 has substantially the same structure as the body-side untwisting tool 2 in the present embodiment, it is different from the body-side untwisting tool 2 only.
The size is made slightly smaller in accordance with the size of the tool-side engagement tool 5. Also. The body-side untwisting tool 2 and the tool-side untwisting tool 4 are press-fitted into the respective openings of the body-side untwisting tool 2 and the tool-side untwisting tool 4 via C-ring spacer members 26 and 46. is there.

The connecting cord 3 is formed by twisting a large number of thin stainless wires to form a wire core 31 having sufficient flexibility and necessary tensile strength, and covering the wire core 31 with an elastic material such as urethane rubber. The required shape including the spiral portion is maintained by forming the covering portion 32 (see FIG. 4).

As shown in FIG. 2, the locking member 22 inserted into the body-side untwisting device 2 has an inner diameter slightly smaller than the outer diameter of the protruding engagement portion 13, and In order to expand the locking member 22 itself in the radial direction by a pressing force at the time of press-fitting, the locking member 22 is formed in a substantially C-ring plate shape having a narrow slit groove 22a from the outer diameter portion to the inner diameter portion. Further, on the upper edge side of the inner diameter portion of the locking member 22, the expansion of the locking member 22 itself due to the pull-out force of the protruding engagement portion 13 of the body-side engagement tool 1 engaged and held by the inner diameter portion is performed. A ring-shaped locking projection 22b for preventing the rotation is provided, and the inner peripheral side of the opening of the untwisting tool 2 is held by the ring-shaped locking projection 22b. A pair of reinforcing rib-shaped flange portions 22c are extended at symmetrical positions of the locking member 22 so as to match the outer shape of the untwisting tool 2. Further, when the body side engaging device 1 is press-fitted, the corner portion of the protruding engaging portion 13 comes into contact with the inner peripheral side of the engaging protrusion 22b communicating with the inner diameter portion, and the engaging member 2
A ring-shaped chamfered portion 22d for smoothly fitting into the inner diameter portion 2 is provided.

As shown in FIG. 3, the locking member 42 inserted into the tool-side untwisting tool 4 has substantially the same structure as the locking member 22 inserted into the body-side untwisting tool 2. In comparison with the locking member 22 on the side twisting tool 2 side, it is slightly smaller depending on the size of the protruding engaging portion 53 of the tool side engaging tool 5. That is, the locking member 42 has an inner diameter portion that is slightly smaller than the outer diameter of the protruding engagement portion 53, and the locking member 42 itself is radially expanded by a pushing force when the protruding engagement portion 53 is pressed. It is formed in a substantially C-ring-shaped plate with a narrow slit groove 42a from the outer diameter part to the inner diameter part. Also, on the upper edge side of the inner diameter portion of the locking member 42,
A ring-shaped locking projection 42b is provided to prevent the locking member 42 itself from expanding due to the pull-out force of the protruding engagement portion 53 of the tool-side engagement tool 5 engaged and held in the inner diameter portion. In this state, the inner peripheral side of the opening of the untwisting tool 4 is anchored and held by the ring-shaped locking projection 42b. A pair of reinforcing rib-shaped flanges 42c extend at symmetrical positions of the locking member 42 so as to match the outer shape of the untwisting tool 4. At this time, recesses 42e are formed on the base edge side of the flange portions 42c extending from the ring-shaped locking projections 42b. further,
The corner portion of the protruding engagement portion 53 comes into contact with the inner peripheral side of the locking protrusion 42b communicating with the inner diameter portion when the tool-side engagement tool 5 is press-fitted, and smoothly fits into the inner diameter portion of the locking member 42. A ring-shaped chamfered portion 42d is provided for the purpose.

Next, an example of an assembling procedure for the embodiment configured as described above will be described. In the following, a description will be given of a case where the connecting cord 3 and the body-side engaging device 1 are connected to the body-side untwisting device 2.
When the connecting cord 3 and the tool-side engaging member 5 are connected to each other, the description is omitted because it is substantially the same. First, the connecting cord 3 is engaged with the body-side untwisting tool 2, and as shown in FIG. 4A, the covering portion 32 at the end of the connecting cord 3 is removed by a required length to remove the wire core 31. Leave it exposed. Then, as shown in FIG. 4 (b), the connecting cord 3 is passed through the through hole 24 of the tubular portion 21 of the body side untwisting tool 2 from the end, and the exposed wire core 31 is inserted into the tubular stopper 33. Center hole 3
Pass through 3a. Thereafter, the pressure P ₁ is applied from outside the stopper 33.
Then, the stopper 33 is fixed to the wire core 31 of the connecting cord 3 by caulking. 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 regulated by the step 25 on the inner surface of the body-side untwisting tool 2 and does not come off.

Next, the body side engaging device 1 is connected to the body side untwisting device 2 by press fitting. First, as shown in FIG.
The locking member 22 is inserted into the side window 23 of the tubular portion 21 of the body side twisting tool 2. At this time, the ring-shaped locking projection 22b formed on the inner diameter side edge of the locking member 22 is
Is inserted so as to face the opening of the cylindrical portion 21 to be press-fitted. Then, once the ring-shaped concave portion 13a of the body-side engaging device 1 is press-fitted into the opening of the cylindrical portion 21 via the spacer member 26, the protruding engaging portion 13 once becomes the engaging member 22 of the C-ring structure. The body-side engaging device 1 is twisted back into the body-side twisting device 2 by abutting against the chamfered portion 22d of the inner diameter portion, pushing the locking member 22 itself in the radially expanding direction, and dropping the inner diameter portion into the ring-shaped recess 13a. To be rotatably engaged around the axis. At this time, a ring-shaped locking projection 22b provided on the upper edge side of the inner diameter portion of the locking member 22
Is in a state of being held and held by the inner peripheral side of the opening of the body-side untwisting tool 2, and is caused by the pull-out force of the protruding engagement portion 13 of the body-side engaging tool 1 engaged and held in the inner diameter portion. The expansion of the locking member 22 itself is prevented by the engagement of the inner periphery of the opening of the untwisting tool 2. In addition, since the locking member 22 and the ring-shaped concave portion 13a are rotatably engaged around the axis, even if the connecting cord 3 is twisted, the connecting cord 3 immediately returns 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 applied to the case where the connecting cord 3 and the tool-side engaging tool 5 are connected to the tool-side untwisting tool 4 in the same manner, and the body-side engaging tool 1, the body-side untwisting tool 2, the connecting cord 3, and the tool-side untwisting tool are used. The tool 4 and the tool-side engaging tool 5 can be connected in this order to complete the product.

[0019]

According to the present invention having the above-described structure, it is easy to control the connection strength by caulking a fastener for engaging the connecting cord with the untwisting tool. Can be adjusted by the selection of the above, and the steps of folding the connecting cord, compressing the crimped tube with two connecting cords inserted, inserting the heat shrink tubing and heating steps, etc. can be eliminated as in the past. It is easy and cost-saving, and the size of the untwisted part can be smaller than before, it is easy to grasp, even if multiple pieces are used, the waist can be organized, and the design can be neat and smart, In addition, the body-side engaging tool or the tool-side engaging tool and the body-side engaging tool for the untwisting tool or the untwisting tool are strengthened by increasing the engagement strength between the untwisting tool and the body-side engaging tool or tool-side engaging tool while the rotation around the axis is free. It is possible to prevent the bleeding out by pulling force of the tool-side engaging member.

That is, according to the present invention, the body-side engaging tool 1 that engages with clothes and the like of a tool carrier and the tool-side engaging tool 5 that engages with a part of tools are connected by the connecting cord 3. In the tool drop prevention safety cords that are combined, a press-fit fixed type untwisting device (2) is provided between the body-side engaging device 1 and the connecting cord 3 and between the tool-side engaging device 5 and the connecting cord 3. 4)
In addition, a rod-shaped protruding engaging portion (13, 5) is provided on the untwisting tool connecting side of the body-side engaging tool 1 or the tool-side engaging tool 5.
3), a ring-shaped recess (13a, 53a) is provided near the base of the projecting engagement portion (13, 53), and the projecting engagement portion (13, 53) is untwisted. , 4) so that the body-side engaging tool 1 or the tool-side engaging tool 5 is press-fitted into the opening and rotatably engaged around the axis.
4) is provided with a locking member (22, 42), and the locking member (22, 42) further includes a protruding engagement portion (1).
3, 53), and has an outer diameter such that the locking member (22, 42) itself is expanded by a pushing force at the time of press-fitting of the protruding engagement portion (13, 53). This is because the groove is formed in a substantially C-ring shape having slit split grooves (22a, 42a) from the portion to the inner diameter portion.

On the upper edge side of the inner diameter portion of the locking member (22, 42), a protruding engagement portion (13) of the body-side engagement tool 1 or the tool-side engagement tool 5 engaged with and held by the inner diameter portion is provided. , 5
A ring-shaped locking projection (22b) that is suspended and held on the inner peripheral side of the opening of the untwisting tool (2, 4) in order to prevent the expansion of the locking member (22, 42) itself due to the pull-out force of 3). , 42
Since b) is provided, the strength of engagement between the body-side engaging tool 1 or the tool-side engaging tool 5 and the untwisting tool (2, 4) is always maintained while the rotation around the axis is free. Therefore, the body-side engagement tool 1 or the tool-side engagement tool 5 can be securely and firmly held. That is, even when an external force such as a pulling force acts on the body-side engaging tool 1 or the tool-side engaging tool 5 with respect to the untwisting tool (2, 4), the inner peripheral side of the opening of the untwisting tool (2, 4). Locking members (22, 42)
This is because the ring-shaped locking projections (22b, 42b) are suspended and held, so that the expansion of the locking members (22, 42) themselves can be prevented.

At the symmetric positions of the locking members (22, 42), a pair of reinforcing rib-shaped flange portions (22c, 42c) are extended to match the outer shape of the untwisting tool (2, 4). Therefore, the degree of reinforcement of the locking members (22, 42) itself can be increased, and the support of the untwisting tools (2, 4) becomes firm.

The locking projections (22b, 4)
Since the inner peripheral side of 2b) is provided with chamfered portions (22d, 42d) with which the corner portions of the protruding engaging portions (13, 53) abut, the body-side engaging tool 1 or the tool-side engaging tool 5 is provided. When the protruding engagement portions (13, 53) are press-fitted into the untwisting tools (2, 4), they can be smoothly fitted.

The untwisting tool (2, 4) has a substantially cylindrical tubular portion (21, 41) slightly diverging, and the cylindrical portion (21, 41) has a body side on the large diameter side. When assembling the engagement tool 1 or the tool-side engagement tool 5, the locking member (2
Side windows (23, 43) through which the untwisting tool (2, 4) can be inserted from the peripheral side of the untwisting tool (2, 4) itself.
1, 41) Since the through holes (24, 44) through which the connecting cords 3 pass are provided on the small diameter side, the assembly is easy and the cost is reduced, and the size of the untwisted portion can be made smaller than before. It is easy to grasp, even if you use more than one, you can organize around the waist, and it can be made a smart shape with a neat design.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a partially exploded outline according to an embodiment of the present invention.

FIG. 2 shows a locking member in the body side engaging device,
(A) is a top view, (b) is an AA sectional view in (a).

FIG. 3 shows a locking member of the tool-side engaging tool,
(A) is a plan view, (b) is a BB sectional view in (a).

FIGS. 4A and 4B show a procedure for assembling the respective parts, wherein FIG. 4A is a cross-sectional view just before assembling, and FIG. 4B is a cross-sectional view showing a state in which the untwisting tool and the connecting cord are connected.

FIG. 5 is a cross-sectional view showing a procedure of assembling the respective parts, in which a protruding engagement part of a body side engagement tool, a spacer member, and a locking member are inserted into a untwisting tool.

FIG. 6 is a cross-sectional view showing a connected state of the body side engaging device and the untwisting device.

7A and 7B show a conventional example, in which FIG. 7A is a perspective view showing an example of a use situation of a safety cord for carrying a tool, and FIG. 7B is folded back by passing the tip of a connecting cord passed through a caulking tube through a untwisting portion. FIG. 3C is a perspective view showing a state in which the two folded connecting cords are joined together by caulking together and the heat-shrinkable tube is covered on the caulking pipe, and FIG. is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body side engagement tool 2, 4 Twist return tool 3 Connecting code 5 Tool side engagement tool 11, 51 Hook part 13, 53 Projection engagement part 13a, 53a Ring-shaped recessed part 21, 41 Cylindrical part 22, 42 Stop member 22a, 42a Slit split groove 22b, 42b Locking projection 22c, 42c Flange part 22d, 42d Chamfered part 31 Wire core 32 Cover part

Claims (7)

[Claims] 1. A tool for preventing a tool from falling by connecting a body-side engaging tool that engages with clothes and the like of a tool carrier and a tool-side engaging tool that engages a part of tools with a connecting cord. In the safety cord, a tool press-prevention safety cord is provided, which is provided with a press-fitting fixed type untwisting tool between the body-side engaging tool and the connecting cord and between the tool-side engaging tool and the connecting cord. . 2. A bar-shaped protruding engaging portion is provided on the body-side engaging tool or the tool-side engaging device on the untwisting tool connecting side, and a ring-shaped concave portion is provided near the base of the protruding engaging portion. The projecting engaging portion is press-fitted into the opening of the untwisting device, and a locking member is attached to the untwisting device so that the body-side engaging tool or the tool-side engaging device is rotatably engaged around the axis. The safety cord for preventing a tool from falling according to claim 1. 3. The locking member has an inner diameter portion that is slightly smaller than the outer diameter of the protruding engagement portion, and the locking member itself is expanded by a pushing force when the protruding engagement portion is press-fitted. 3. The safety cord for preventing a tool from falling according to claim 1 or 2, wherein the safety cord is formed in a substantially C-ring shape having a slit groove from a diameter portion to an inner diameter portion. 4. A locking member provided on the upper edge side of the inner diameter portion of the locking member by a pull-out force of a protruding engagement portion of a body-side engaging tool or a tool-side engaging tool engaged and held by the inner diameter portion. 4. The safety cord for preventing a tool from falling according to any one of claims 1 to 3, further comprising a ring-shaped locking projection that is held and held at an inner peripheral side of an opening of the untwisting tool so as to prevent expansion of the tool. . 5. The tool according to claim 1, wherein a pair of reinforcing rib-shaped flange portions are extended at symmetric positions of the locking member so as to conform to an outer shape of the untwisting tool. Safety cord for fall prevention. 6. The tool drop prevention device according to claim 1, wherein a chamfered portion is provided on an inner peripheral side of the locking projection communicating with the inner diameter portion, the chamfered portion being in contact with a corner portion of the projecting engagement portion. Safety cord. 7. The untwisting tool has a substantially cylindrical tubular part slightly diverging, and a body-side engaging tool or a tool-side engaging tool is mounted on the large-diameter side of the tubular part. 7. In this case, a side window is provided so that the locking member can be inserted from the peripheral side of the untwisting tool itself, and a through-hole for passing a connecting cord is provided on the small diameter side of the cylindrical portion. Safety string for tool drop prevention according to any of the above.