JP2000310040A - Safety belt fitting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a large latch strength according to a downward load by jouralling a hooking plate provided with a presser part for pressing an annular part capable of hooking the hook of a safety belt and the outer circumferential face of a vertical member on a fitting part capable of being mounted to the vertical member from the outside. SOLUTION: This safety belt fitting tool 1 is constituted of a fitting part 2, a hooking plate 3, and a latch mechanism 4. In the fitting part 2, nearly cylindrical engaging pieces 5, 6 are arranged opposite to each other and hinged with a shaft 10. The hooking plate 3 is formed out of an annular part 14 and a saw-tooth-like presser part, and a lock shaft pedestal is penetrated through on the intermediate position to be rotatably journalled. The latch mechanism 4 is constituted of a lock shaft 18, a lock lever 19, and the like. The lock lever 19 is rotated the fitting part 2 is unlocked to open the engaging piece 5, a vertical member is received in a pipe holding space 7, and the hook of a safety belt is engaged with the annular part 14. Then the presser part is projected into the pipe holding space to press the outer circumferential face of the vertical member. Hereby, fitting and unfitting can be easily executed, and a working place can be smoothly moved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety belt attachment used for hooking a safety belt hook to a vertical member of a scaffold at a construction site or the like.

[0002]

2. Description of the Related Art In a construction site or the like, as shown in FIG. 8, it is common practice to assemble a scaffold 100 with a member such as a pipe outside an outer wall. That is, the vertical distance between the horizontal members 101 is
It is usually about 2 m in consideration of the necessity of traffic, workability and work range.

On the other hand, a safety belt 103 for fall prevention used at such a construction site includes an operator's waist belt, a rope extending from the waist belt, and a hook-shaped hook 104 ( The specifications are defined in the “Safety Belt Standards” of the Ministry of Labor to ensure safety. According to this, the rope length of the safety belt 103 is 1.5 m. This is because if the fall distance is long at the time of the crash,
It is a regulation that considers that the impact load acting on the worker when the fall is stopped by the safety belt 103 may be large and visceral rupture or visceral damage may occur, and that it may collide with the structure below. is there. Further, for the same purpose, it is determined that the hooking position of the hook 104 at the tip of the safety belt 103 must be higher than the waist.

Accordingly, in order to work on a scaffold 100 without a handrail as shown in FIG. 8, the hook 104 at the tip of the safety belt 103 is engaged with the horizontal member 101 above the head or the vertical member 102 of the hierarchy. Need to be done. When the hook 104 is hooked on the overhead member 101, since the height of the waist belt of the worker is about 1 m, the distance from the position of the waist belt of the safety belt 103 to the hook hook point is about 1 m.
However, the safety margin of the rope of the safety belt 103 is only about 50 cm, and there is a disadvantage that the movable range of the worker, that is, the working range is considerably limited.

When the hook 104 is hooked on the vertical member 102, the hook 104 intersects with the horizontal member 101 at the bottom of the hierarchy, that is, the foot, unless there is a protrusion such as a horizontal bar crossing the vertical member 102. It falls to the point. If the hook 104 falls to the intersection with the lower horizontal member 101 in this way, the falling distance at the time of the fall becomes long, about 2.5 m, which is very dangerous. Also, as shown in FIG. 9, the horizontal member 101 crosses the middle part of the vertical member 102, and even if the hook 104 can be hooked at the crossing part, the hook-shaped hook 104 becomes horizontal. Therefore, when the worker falls and the safety belt 103 is pulled downward and an external force is applied to the base of the hook 104 vertically downward, the force in the direction of folding the hook 104 sideways at the contact point with the horizontal member 101 is applied. Acting, the safety cap 106 that comes into contact with the hook-shaped tip 105 of the hook 104 and closes the hook 104 comes off, and the hook may not fall on the vertical member 102 and fall.

[0006]

SUMMARY OF THE INVENTION As described above, the safety belt 1
03 hook 104 directly to the vertical member 102 of the scaffold 100,
In order to improve the above-mentioned inconvenience which may occur when the clamp 1 is engaged with the horizontal member 101, a clamp 1 as shown in FIG.
10 are used. In this clamp 110, a pair of engagement pieces 111, 112 which can be externally fitted to the vertical member 102 are hinged so as to be openable and closable.
15 are connected, and the other engaging pieces 1
A groove 114 is formed at the end of the groove 12. Therefore,
The clamp 110 can be attached to an arbitrary portion of the vertical member 102 by inserting the bolt 113 into the concave groove 114 and tightening the end between the engagement pieces 111 and 112 with the nut 115. The above-described inconvenience is prevented by hooking the hook 104 on the connected annular portion 116.

However, when the clamp 110 is mounted, as described above, the engagement pieces 111 and 112 are externally fitted to the vertical member 102, the bolt 113 is fitted to the concave groove 114, and the nut 1
Since work such as 15 screwing is required, a predetermined time is required for mounting, and both hands must be used without fail, resulting in low workability. In addition, the nut 115 may be loosened due to the degree of tightening, and it is difficult to secure a constant strength of engagement with the vertical member 102. Therefore, the nut 115 may be loosened during use, and may fall to the floor of the floor. Further, according to the clamp 110, the state in which the bolt 113 is fitted into the concave groove 114 may come off when a drop impact load at the time of a fall acts instantaneously,
When the bolt 113 is disengaged from the concave groove 114, the engagement with the vertical member 102 is released, and as a result, the safety belt 103 loses its support point, and a very dangerous situation cannot be prevented.

The present invention has been made in view of these inconveniences, and it is possible to attach a scaffold to a vertical member by a simple operation, and to generate a large locking strength even when an impact load due to a fall is applied. It is intended to provide a band attachment.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises an annular mounting portion which can be fitted to a vertical member of a scaffold, an annular portion to which a hook of a safety belt can be hooked, And a pressing portion configured to press an outer peripheral surface of the vertical member in response to a downward load acting on the portion.

According to this safety band mounting tool, the hook of the safety band can be hooked on the vertical member of the scaffold by fitting the hook to the vertical member of the scaffold by the mounting portion and engaging the hook with the annular portion. However, when a downward load acts on the annular portion due to the own weight of the safety belt, the pressing portion presses the outer peripheral surface of the vertical member, so the safety belt mounting tool stops at the engagement point of the vertical member, and reaches the floor surface. Falling can be prevented. Further, when a large shocking downward load is applied from the safety band to the annular portion of the safety band attachment by the fall of the worker, the pressing portion presses the outer peripheral surface of the vertical member according to the downward load, The strength of engagement with the vertical member is increased, and the effect of preventing a worker from falling can be drastically increased.

The mounting portion may include a pair of opposed arcuate engagement pieces, the two engagement pieces may be hinged at one end of the arc shape, and the other end may be freely opened and closed. According to this mounting portion, the pair of arc-shaped engaging pieces are opened, fitted to the vertical member of the scaffold, and the safety band mounting tool is engaged with the vertical member by a simple operation of closing both engaging pieces. be able to. At this time, if a latch mechanism is provided between the other ends of the two engagement pieces in the attachment portion to regulate the opening and closing thereof, the safety band attachment can be more completely engaged with the vertical member, and the safety belt attachment can be dropped. The integrity of the prevention can be improved.

Here, the “arc shape” described in the present specification refers to
This concept includes a case where the cross-sectional shape is an arc shape. Further, the “latch mechanism” is a concept that includes, for example, a simple hook-like mechanism that hangs both of them, and a complicated lock mechanism.

It is preferable that a hook engaging plate having the above-described annular portion and the pressing portion is provided, and the hook engaging plate is rotatably supported on the other end of the engaging piece so as to be vertically rotatable. According to this means, since the hook hooking plate is rotatably supported in the vertical direction, when the hook of the safety belt is hooked on the annular portion formed on the hook hooking plate, the own weight of the safety belt becomes annular. The hook engaging plate is rotated so that the annular portion moves downward. The rotation of the hook engaging plate also causes the pressing portion to rotate. Therefore, if the pressing portion is provided so that the outer peripheral surface of the vertical member engaged with the mounting portion can be pressed by the rotational movement of the pressing portion, the pressing portion is moved in accordance with the downward load acting on the annular portion. Can be pressed, and the above-mentioned operation can be exerted by such a simple structure.

It is also possible to protrude a hook engaging plate having an annular portion from the other end of the engaging piece (the end opposite to the hinged one). Also by this means, the hook portion and the safety band attachment itself are inclined by the downward load acting on the annular portion, and the pressing portion is arranged at a position where the outer peripheral surface of the vertical member can be pressed by the tilting movement of the hook portion. In this case, the pressing portion can press the outer peripheral surface of the vertical member in accordance with the downward load acting on the annular portion.

Further, a pair of the pressing portions are provided, and each of the pair of pressing portions is disposed near the other end of the pair of engaging pieces. It is good to comprise so that it may contact a vertical member at a point. According to this means, when the safety band mounting tool itself is inclined by the downward load acting on the annular portion, the one end portion (the hinged portion) of the pair of engagement pieces and the vicinity of the other end of the pair of engagement pieces are provided. It contacts the outer peripheral surface of the vertical member engaged with the mounting portion at three points with the pair of pressing portions provided. That is, since the outer peripheral surface of the vertical member can be pressed at three points in accordance with the downward load acting on the annular portion, the safety band attachment can be further prevented from sliding down. Further, since the three-point support is used as described above, the occurrence of dents on the surface of the vertical member due to the pressing of the pressing portion can be reduced. Further, the inclination (twist) of the safety band attachment to the left and right can be reduced, and from this point, the effect of preventing the safety belt from sliding down can be exhibited.

A projection extending from one of the engagement pieces to which one of the engagement pieces is hinged; and
It is good to constitute so that an attachment part may be closed by pushing this projection part on a vertical member. By doing so, the mounting portion is kept open, and the other of the pair of engaging pieces without the protruding portion is gripped with one hand to fit outside the vertical member, and the protruding portion of the one By pressing the part against the vertical member, one engagement piece can be rotated toward the other engagement piece, and the mounting part can be closed. In other words, the safety belt attachment can be attached to the vertical member by one-handed operation.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings as appropriate. FIG. 1 is a perspective view showing a safety band attachment according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the safety band attachment of FIG. 1, and FIG. 3 is an attached state of the safety band attachment of FIG. 4A and 4B are plan views showing FIG.
It is sectional drawing which shows the locked state and movable state of the lock lever in the latch mechanism of the safety-band attachment of FIG. FIG. 5 is a perspective view showing a safety band attachment of a form different from that of the safety band attachment of FIG. 1, and FIG. 6 is a perspective view showing an opened state of the safety band attachment of FIG. Further, FIG. 7 is a perspective view showing a safety band attachment of a form different from the safety band attachment of FIGS. 1 and 5.

The safety belt mounting device 1 shown in FIG.
It is roughly divided into a hook engaging plate 3 and a latch mechanism 4. The mounting portion 2 is disposed in a facing state so that a pair of substantially semi-cylindrical (semicircular arc-shaped horizontal cross-sections) engaging pieces 5 and 6 form a cylindrical pipe holding space 7 therein. One end 8 of the engagement piece 5 and one end 9 of the engagement piece 6 are hinged by a shaft 10 (see FIG. 2), and the other end 12 of the engagement piece 5 and the other end of the engagement piece 6 The part 13 is provided to be freely opened and closed (see FIG. 3).
Further, a spring 1 is provided at a hinged position between the engagement piece 5 and the engagement piece 6.
1 is provided, and an elastic force is applied in a direction in which the other end portions 12 and 13 abut (that is, a closing direction). The mounting portion 2 is closed by opening the other end portions 12 and 13 of the engagement pieces 5 and 6 and externally fitting the same to the vertical member, and fitting the vertical member into the pipe holding space 7 to provide the safety. This is a portion intended to attach the band attachment 1 to the vertical member. The other ends 12, 13 of the engagement pieces 5, 6 are formed in parallel flat plates.

The hook engaging plate 3 is a half-elliptical flat plate, in which an annular portion 14 is formed by forming a through hole on the elliptical side, and a pressing portion 15 is formed by forming the straight side into a sawtooth shape. ing. A substantially cylindrical lock shaft pedestal 17 penetrates through an intermediate position between the annular portion 14 and the pressing portion 15 of the hook engaging plate 3, and the lock shaft pedestal 17 is vertically fixed to the other end 13 of the engagement piece 6. By doing so, the hook engaging plate 3 is
And the pressing portion 15 are rotatably supported in the vertical direction. The pressing portion 15 is provided in a position parallel to the axial direction of the pipe holding space 7 of the mounting portion 2 and along the outer peripheral surface of the column of the pipe holding space 7.

The latch mechanism 4 is connected to a lock shaft 18 rotatably fitted in a cylindrical hollow portion of the lock shaft pedestal 17 and to the tip of the lock shaft 18 outside the other end 13 of the engagement piece 6. The main components are a lock lever 19 and a safety pin 20 vertically projecting outside the other end 13 of the engagement piece 6 for positioning the lock lever 19. A substantially rectangular plate-shaped lock piece 21 is formed at the other end 12 side end of the lock shaft 18, and the lock piece 21 is located outside the other end 12 with both other ends 12 and 13 closed. It is arranged as follows. On the other hand, a lock hole 22 into which the lock piece 21 can be fitted is formed at a position of the other end 12 that matches the lock piece 21. Therefore, the lock shaft 18 and the lock piece 21 are rotated by the rotation of the lock lever 19, and the lock piece 21 is located in the lock hole 22 so that the lock piece 21 can be fitted into the lock hole 22.
3 can be freely opened and closed. From this state, the lock lever 19 is rotated 90 degrees, and the lock piece 21 is made perpendicular to the lock hole 22 to lock the open and close of the other end portions 12 and 13. Can be in a state. In the safety band mounting device 1 of the present embodiment, since the lock hole 22 is formed in a vertically long shape, the lock of the mounting portion 2 is released when the lock piece 21 is turned to the vertically long state.

Next, positioning of the lock lever 19, that is, rotation control will be described. The lock lever 19 performs only the displacement between the state where the lock piece 21 is positioned vertically and can be fitted into the lock hole 22 and the state where the lock piece 21 is positioned horizontally and cannot pass through the lock hole 22. For the sake of simplicity, the safety pin 20 is limited to rotate only a predetermined 90 degrees. As shown in FIGS. 4A and 4B, the safety pin 20 includes a flat plate-shaped push plate 24, a small-diameter portion 25, a large-diameter portion 26, and a shaft 27 in order from the outside of the other end 13.
And penetrates the other end 13 of the engagement piece 6 with the shaft 27,
And it is supported by penetrating by the large diameter part 26 to the holding piece 23 fixed parallel to the outside of the other end part 13.
A retaining ring 28 is externally fitted to the shaft portion 27 of the safety pin 20 inside the other end portion 13 to prevent the safety pin 20 from falling off from the other end portion 13. Further, the large diameter portion 2 is attached to the shaft portion 27 of the safety pin 20.
6 and the other end 13 are provided with a spring 29 for applying a resilient force,
The push plate portion 24 is urged in a direction to move outward from the other end portion 13.

In a normal state, the safety pin 20 having the above structure protrudes until the retaining ring 28 comes into contact with the other end 13 as shown in FIG. Touch On the other hand, when the push pin portion 24 is pressed and the safety pin 20 is pushed in, the small diameter portion 25 contacts the lock lever 19 as shown in FIG. Further, the lock piece 21 is provided with a lock hole 22 on the substantially flat lock lever 19.
The large diameter portion 26 of the safety pin 20
A recess 30 is formed along the outer peripheral surface of the lock pin 21 so that when the lock piece 21
A concave portion 31 is formed along the outer peripheral surface of the large diameter portion 26 of FIG. Further, a space between the concave portion 30 and the concave portion 31 of the lock lever 19 is formed in an arc shape so as to contact the outer periphery of the small diameter portion 25 of the safety pin 20. The outer sides of the recesses 30 and 31 of the lock lever 19 are greatly protruded so as to collide with the safety pin 20, and the lock lever 19 is regulated so as to rotate only 90 degrees between the recesses 30 and 31.

Therefore, when the lock lever 19 is rotated to fit the concave portions 30 and 31 with the large diameter portion 26 of the safety pin 20, the rotation of the lock lever 19 is restricted. On the other hand, when the push plate portion 24 of the safety pin 20 is pressed to release the engagement between the concave portions 30 and 31 and the large diameter portion 26 and the engagement with the lock lever 19 is switched to the small diameter portion 25 of the safety pin 20, Recess 3
The rotation of the lock lever 19 is enabled in the range of the arcuate portion between 0 and 31. That is, when the push plate portion 24 of the safety pin 20 is pressed (see FIG. 4B), the lock lever 19 can rotate 90 degrees, and when the safety pin 20 is not pressed, the mounting portion 2 is locked. Or, it can be fixed in a state where it is not locked.

An arc-shaped elongated hole 32 having a predetermined length is formed through the hook engaging plate 3, and the shaft 27 of the safety pin 20 is inserted into the elongated hole 32. The rotation about the lock shaft pedestal 17 is restricted to a predetermined range. The distal end of the other end 12 is bent outward at a predetermined angle to form an engaging projection 33.

A method for using the above-mentioned safety band attachment 1 will be described. First, the lock lever 19 is rotated while the push plate portion 24 of the safety pin 20 is pressed, so that the concave portion 30 is fitted to the large-diameter portion 26 of the safety pin 20, and the lock of the mounting portion 2 is released.
Next, when the engaging piece 6 is held with one hand and the engaging projection 33 of the other engaging piece 5 is brought into contact with the vertical member 102 of the scaffold and pulled toward the user, the engaging piece 5 opens as shown in FIG. The vertical member 102 easily fits in the pipe holding space 7, and the other ends 12, 13 of the engagement pieces 5, 6 are closed by the spring 11. After that, the safety pin 20 is pushed, and the lock lever 19 is rotated so that the recess 31 is formed.
Is fitted to the large diameter portion 26 of the safety pin 20 to lock the mounting portion 2. Thereby, the vertical member 1 of the safety belt attaching device 1
02 is completed.

As described above, the safety band attachment 1 attached to the vertical member 102 is used by hooking the safety band hook on the annular portion 14 of the hook hooking plate 3. At this time, a downward load acts on the annular portion 14 due to the weight of the safety belt.
The hook engaging plate 3 rotates about the pivot point of the lock shaft pedestal 17, and the lower part of the saw-tooth-shaped pressing portion 15 located on the opposite side of the annular portion 14 across the pivot point rotates upward. Therefore, the lower portion of the pressing portion 15 projects into the pipe holding space 7 of the mounting portion 2 and presses the outer peripheral surface of the vertical member 102. By the pressing of the vertical member 102 by the pressing portion 15, the safety band mounting tool 1 can be mounted at an arbitrary position on the vertical member 102. When a worker falls or the like occurs, a downward impact force acts on the annular portion 14 via the safety belt, and the pressing portion 15 also presses the outer periphery of the vertical member 102 in proportion to this force. I do. As a result, the safety belt attachment 1
The greater the downward pulling force, the greater the vertical member 102
Therefore, the downward movement of the safety-band attachment 1 can be prevented in any case. Therefore, even if a drop or the like occurs, the worker can be retained and the fall distance can be minimized, and the impact on the worker can be minimized.

The safety band attachment 51 shown in FIGS. 5 and 6 comprises a mounting portion 52, hook engaging plates 53a and 53b, and a latch mechanism 54, similarly to the safety band attachment 1 shown in FIG. The mounting portion 52 is disposed so that a pair of substantially semi-disc-shaped engaging pieces 55 and 56 are opposed to each other so as to form a circular pipe holding space 57, and is engaged with one end 58 of the engaging piece 55. One end 59 of the piece 56 is hinged by a shaft 60, and the other end 61 of the engagement piece 55 and the other end 62 of the engagement piece 56 are provided to be freely opened and closed.

The hook engaging plates 53a and 53b are plate-like members having the same shape, and the annular portions 63a and 53b are formed by forming through holes.
63b is formed, and a pressing portion 64 is formed on the pipe holding space 57 side.
a, 64b are formed. This hook hooking plate 53a
Is perpendicularly protruded from the other end 61 of the engagement piece 55, and the hook engaging plate 53b is vertically protruded from the other end 62 of the engagement piece 56, and is closed with the other ends 61 and 62 closed. The hook engaging plates 53a and 53b are disposed so as to overlap.

The latch mechanism 54 comprises a lock piece 65 having a U-shaped cross section rotatably connected to the hook engagement plate 53b.
By holding a and 53b, the attachment portion 52 is prevented from opening.

Similarly to the above-described safety band mounting tool 1, the safety band mounting tool 51 opens the engaging pieces 55 and 56 of the mounting portion 52,
The vertical member 102 is housed and closed in the pipe holding space 57, and the mounting portion 52 is locked by the latch mechanism 54, whereby the mounting is completed. The annular portion 63 of the safety belt attachment 51
The safety band hooks 51a and 63b are used by hooking the safety band hooks.
Due to the downward load acting on the safety belt mounting tool 51 itself, the pressing part 64a on the pipe holding space 57 side is inclined.
64b presses the outer peripheral surface of the vertical member 102. for that reason,
The safety belt mounting tool 51 is also used by the safety belt mounting tool 51.
The same action as described above can be exhibited.

7 is the same as the safety band attachment 51 of FIG. 5 described above. The safety band attachment 71 includes a pair of pressing parts 72 and 73, a protruding part 74, and a pendulum 75.

The pair of pressing portions 72 and 73 are provided on the lower surface near the other end portions 61 and 62 of the pair of engaging pieces 55 and 56. Therefore, when the safety band mounting tool 71 itself is inclined by the downward load acting on the annular portions 63a, 63b, the one end portions 58, 59 of the pair of engagement pieces 55, 56 and the pair of pressing portions 72, 73 are vertically extended. Since the abutment comes into contact with the outer peripheral surface of the member, the safety band attaching tool 71 is stabilized, and the effect of preventing downward sliding can be promoted.

The projecting portion 74 extends from the hinged one end 58 of the one engaging piece 55 along the other engaging piece 56. Therefore, with the mounting portion 52 opened,
The mounting portion 52 can be closed with one hand by holding the other engagement piece 56 side without the protrusion 74 and fitting the outer member to the vertical member and pressing the protrusion 74 against the vertical member.

Further, one end of the pendulum 75 is rotatably engaged with the inside of the hook engaging plate 53a, and a pair of hook engaging plates 53a, 53b is provided when the other end is suspended downward as viewed in FIG. Can be closed to close the mounting portion 52. Conversely, when the safety band mounting tool 71 is turned upside down as viewed in FIG.
3a, between 53b and can not match,
As a result, the configuration is such that the mounting portion 52 cannot be closed. When the safety band attachment 71 is mounted upside down, the pressing portions 72 and 73 do not abut against the vertical members, and there is a possibility that the safety band attachment cannot exert the drop prevention effect. Therefore, the pendulum 75 is equipped and the safety band mounting fixture 7 is mounted.
1 is prevented from being mounted upside down.

Note that the safety band attachment of the present invention is not limited to the above-described embodiment, and for example, FIGS.
In the safety band attachment 50 of the above, the pressing portions 64a and 64b may be formed in a saw-tooth shape like the safety band attachment 1 of FIG.

[0036]

As described above, according to the present invention, the following effects can be obtained. That is, (1) In normal times, the vertical member is pressed by the downward load on the annular portion due to the own weight of the safety belt, and only the fall of the safety belt attachment is prevented. Therefore, by lifting the annular portion and removing the downward load, the engagement position of the safety band attachment can be easily slid.

(2) On the other hand, when the worker falls down or falls, the pressing portion presses the vertical member with a large force due to the shocking downward load hanging on the annular portion of the safety belt mounting device. To prevent crashes. In other words, the risk of the worker falling off the scaffold can be significantly reduced by the simple structure of the safety band attachment as compared with the case where the conventional clamp is used.

(3) Since the engagement with the vertical member can be performed by the pressing portion without tightening with a nut like a conventional clamp, the operation for engaging with the vertical member is simplified. Become. For this reason, the attachment and detachment of the safety belt attachment to and from the vertical member becomes easy, and as a result, the movement of the work place becomes smooth.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a safety belt attaching device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the safety belt attaching device of FIG.

FIG. 3 is a plan view showing a mounting state of the safety belt mounting device of FIG. 1 to a vertical member.

FIG. 4A is a cross-sectional view showing a locked state of a lock lever in the latch mechanism of the safety belt attaching device of FIG. 1, and FIG. 4B is a cross-sectional view showing a movable state of the lock lever.

FIG. 5 is a perspective view showing a safety band attachment of a form different from that of the safety band attachment of FIG. 1;

FIG. 6 is a perspective view showing a state where a mounting portion of the safety belt mounting device of FIG. 5 is opened.

FIG. 7 is a perspective view showing a safety band attachment of a form different from the safety band attachments of FIGS. 1 and 5;

FIG. 8 is a perspective view showing an example of a scaffold at a construction site.

FIG. 9 is a perspective view showing a state where the hook of the safety belt is directly engaged with the vertical member.

FIG. 10 is a perspective view showing a clamp.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 safety band attachment 2 attachment part 3 hook engaging plate 4 latch mechanism 5 engagement piece 6 engagement piece 7 pipe holding space 11 spring 12 other end 13 other end 14 annular part 15 pressing part 17 lock shaft base 18 lock shaft DESCRIPTION OF SYMBOLS 19 Lock lever 20 Safety pin 21 Lock piece 22 Lock hole 25 Small diameter part 26 Large diameter part 28 Retaining ring 29 Spring 30 Concave part 31 Concave part 33 Engagement projection 51 Safety band attaching tool 52 Attachment parts 53a, 53b Hook engaging plate 54 Latch mechanism 57 Pipe holding space 63a, 63b Annular portion 64a, 64b Pressing portion 71 Safety band attachment 72, 73 Pressing portion 74 Projecting portion 75 Pendulum

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshikuni Nakashita 1-3-13 Takanawa, Minato-ku, Tokyo Inside TEPCO (72) Inventor Jun Yanase 5-4-3 Hiroo, Shibuya-ku, Tokyo Midori Within Safety Co., Ltd. (72) Inventor Shigeki Fujiwara 1573-2, Kamitakino, Takino-cho, Kato-gun, Hyogo Prefecture F-term within Fujii Electric Works Co., Ltd.

Claims (7)

[Claims] 1. An annular mounting portion that can be fitted onto a vertical member of a scaffold, an annular portion that can be hooked by a safety belt hook, and an outer peripheral surface of the vertical member according to a downward load acting on the annular portion. A safety band attachment having a pressing portion configured to press. 2. The mounting part comprises a pair of arcuate engagement pieces facing each other, the two engagement pieces are hinged at one end of the arc shape, and the other end is freely openable and closable. Safety belt mounting device described in. 3. The safety belt mounting device according to claim 2, further comprising a latch mechanism for restricting opening and closing between the other ends of the two engagement pieces in the mounting portion. 4. The safety band according to claim 2, wherein the hook engaging plate having the annular portion and the pressing portion is rotatably supported on the other end of the engaging piece so as to be vertically rotatable. Fixture. 5. The safety belt attaching device according to claim 2, wherein a hook engaging plate having the annular portion is provided to project from the other end of the engaging piece. 6. A pair of said pressing portions, each of said pair of pressing portions being disposed near the other end of said pair of engaging pieces, and a pair of said pressing portions and one end portion of said engaging piece. 6. The safety band mounting device according to claim 5, wherein the safety band mounting device is configured to contact the vertical member at three points. 7. A projection extending from one end of one of the engagement pieces to which the other engagement piece is hinged, and the projection is pressed against a vertical member to form a mounting portion. The safety belt attachment according to any one of claims 2 to 6, wherein the attachment is configured to be closed.