JP3145096U - Safety belt strap winder for crash prevention - Google Patents

Abstract

A strap winder for a safety belt for preventing a fall that does not easily break even when hooks are repeatedly hooked and removed.
A frame having a substantially U-shaped cross section and a strap take-up drum 3 rotatably disposed in an inner space of the frame. A hook locking member 6 attached to the frame and capable of locking the hook of the strap 4 in a suspended state, and a connecting fitting 7 provided on the frame and connected to a trunk belt of a safety belt for preventing a fall. The hook locking member has a hook-shaped cross section that opens upward when viewed in the direction of the rotary shaft 2 of the strap winding drum in a state where the strap winder is connected to the body belt by the connecting metal fitting. The locking portions 6a and 6b have second locking portions 6d and 6e each having a hook-shaped cross section that opens upward when viewed in a direction perpendicular to the rotation axis.
[Selection] Figure 1

Description

  The present invention relates to a strap winder for a fall-preventing safety belt provided with a strap having a hook at the tip.

  The safety belt for preventing a fall includes a strap having a hook at the tip as a lifeline, and a strap winder is attached to the trunk belt. Then, the body belt is attached to the worker, and the hook is locked to an appropriate fixed object, so that the safety of the worker is ensured in the event that the worker crashes at the work site at a high place. It has become.

By the way, the strap is usually formed from high-strength fibers such as aramid fibers and has a very small expansion / contraction rate. For this reason, a shock absorber is inserted into the connecting portion between the hook and the strap in order to alleviate the impact received by the worker during the crash.
When the hook is not used, the hook is hung on the hook hook attached to the body belt.

  However, in this configuration, the hook and the shock absorber have large dimensions and are bulky, so that when the hook is not used, a large space is occupied in the longitudinal direction of the trunk belt. There was a problem that the space for attaching etc. could not be taken much.

  In order to eliminate this inconvenience, there has conventionally been proposed a hook winder provided on the case of the strap winder and the hook not being located at both ends of the case in the longitudinal direction of the body belt (Patent Document 1). reference). According to this configuration, it is not necessary to secure a space for holding the hook on the trunk belt in addition to the space for attaching the strap winder. However, on the other hand, the case is usually made of plastic, which is inferior in strength to the strap winder's metal frame, etc., and easily deteriorates over time, so the hook is hooked on the hook hook and removed from it. If this was repeated frequently, the case could break and the strap winder could easily break.

JP 2007-167120 A

  Therefore, the subject of this invention is providing the strap winder of the safety belt for a fall prevention which does not break easily even if hook hook and removal are repeated.

  In order to solve the above-mentioned problems, a first device is a strap winder for a safety belt for fall prevention provided with a strap having a hook at a tip, the pair of side plates facing each other, and the pair of side plates. A frame having a substantially U-shaped or B-shaped cross-section composed of a connecting member that connects at least one side edge of the side plate, and is disposed in the inner space of the frame and attached between the pair of side plates. A strap take-up drum that is rotatable around a rotation shaft, and one end of the strap is fixed to the strap take-up drum, and the strap is wound around the strap take-up drum. Is attached to the frame, and a hook locking member capable of locking the hook in a suspended state, and the frame And a hook for connecting to the waist belt of the fall-preventing safety belt, the hook locking member in a state where the strap winder is connected to the waist belt by the hook. When viewed in the direction of the axis of rotation of the strap winding drum, the first locking portion having a hook-shaped cross section that opens upward, and when viewed in the direction perpendicular to the axis of rotation, it opens upward. The strap winder is characterized by having a second locking portion having a hook-shaped cross section.

  In the configuration of the first device, preferably, the first and second locking portions of the hook locking member are integrally formed. Further, the first locking portion of the hook locking member includes a pair of leg portions bent into a hook shape and a connection portion that connects one end of the leg portions, and each of the leg portions. An extension portion is provided at the other end of the second engagement portion, and the second locking portion is bent into a pair of hooks projecting from the extension portion of one leg portion of the first locking portion. Leg portions and second connection portions that connect the tips of the second leg portions, and the extension portions of the leg portions of the first locking portions are respectively attached to the pair of side plates of the frame. It is preferable.

  In order to solve the above-mentioned problem, the second device is a strap winder for a fall-preventing safety belt provided with a strap having a hook at the tip, and a pair of side plates opposed to each other, and A frame having a substantially U-shaped or B-shaped cross section composed of a connecting member that connects at least one side edge of the pair of side plates, and is disposed in an inner space of the frame and attached between the pair of side plates. A strap take-up drum that is rotatable about a rotation axis, and one end of the strap is fixed to the strap take-up drum, and the strap is wound around the end of the strap. The hook is attached, and is further attached to the frame, and protrudes from the frame to lock the hook in a suspended state. A hook locking member, and a coupling fitting provided on the frame and coupled to the body belt of the fall-preventing safety belt, wherein the hook latching member is connected to the strap winder by the coupling fitting. A strap winder having a hook-like cross section opened upward when viewed in a direction perpendicular to the rotation axis of the strap winding drum in a state of being connected to the body belt It is a thing.

  In the configuration of the second device, preferably, the hook locking member includes a plate-shaped locking member main body having a hook-shaped cross section, and an attachment portion provided on one end side of the locking member main body. The attachment portion is attached to the frame, or the hook locking member is composed of a pair of leg portions bent into a bowl shape and a connection portion connecting one end of the leg portions, The other end sides of the leg portions are respectively attached to the pair of side plates of the frame.

In the configurations of the first and second inventions, it is preferable that the connection fitting is connected to the frame, and the hook locking member is attached to a connection portion of the connection fitting and the frame.
The strap winding drum is housed together with a part of the frame, and further includes a casing supported and fixed to the frame. The casing is provided with a strap entrance and is formed at a portion protruding from the casing of the frame. It is preferable that the hook locking member and the connection fitting are attached.

  According to the present invention, the hook locking member is attached to the frame of the strap winder, and the hook of the strap is hooked on or removed from the hook locking member. Since the frame of the strap winder is usually made of metal and is a main part of the strap winder, it has higher rigidity (strength) than other components. Therefore, the strap winder is hardly damaged even when the hook is frequently hooked and removed.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a strap winder of a safety belt for preventing a fall according to one embodiment of the present invention, (A) is a front view, and (B) is a side view. FIG. 3 is a view showing a state in which the strap winder according to the present invention is connected to a torso belt of a safety belt for preventing a fall and is attached to an operator.

  Referring to FIGS. 1 and 2, the strap winder of the present invention connects a pair of side plates 1a and 1b and a pair of side plates 1a and 1b that are spaced apart from each other. A frame 1 having a substantially U-shaped cross section composed of a member 1c, and a strap disposed in the inner space of the frame 1 and attached between the pair of side plates 1a and 1b so as to be rotatable around the rotary shaft 2 A winding drum 3 is provided. One end of the strap 4 is fixed to the strap winding drum 3 and the strap 4 is wound around. The hook 5 is attached to the tip of the strap 4 via a shock absorber 15.

On the outside of one side plate 1b, a circular substrate 9 and a circular front cover 11 are attached by screws 13 at positions corresponding to the strap winding drum 3. In this case, an opening through which the rotary shaft 2 passes is provided at the center of the substrate 9, and a spiral spring 10 is accommodated between the substrate 9 and the front cover 11, and one end of the spiral spring 10 is connected to the rotary shaft 2. The other end is fixed to the front cover 11. Thus, the strap winding drum 3 is elastically biased by the spiral spring 10 in the direction in which the strap 4 is always wound.
In addition, a circular rear cover 12 is attached to the outside of the other side plate 1 a by a screw 14 at a position corresponding to the front cover 11.

  In this embodiment, only the outer sides of the side plates 1a and 1b of the frame 1 are covered by the covers 11 and 12 so that the space between the side plates 1a and 1b is exposed. A casing that is housed together and supported and fixed to the frame 1 may be provided, and a strap entrance may be formed in the casing.

The strap winder is further attached to the frame 1 and is provided with a hook locking member 6 that can lock the hook 5 in a suspended state. The strap winder is connected to the trunk belt of the safety belt for preventing fall. The connecting fitting 7 is provided.
In this embodiment, the hook locking member 6 is, as shown in FIG. 1, a pair of leg portions 6a, 6a bent into a hook shape, and a connecting portion for connecting one ends of the leg portions 6a, 6a. It has the 1st latching | locking part which consists of 6b. At the other end of each of the leg portions 6a, 6a, extended portions 6c, 6c having through holes 6f, 6f at the center are provided. Furthermore, the hook locking member 6 includes a pair of second leg portions 6d, 6d, which are bent into a pair of hooks protruding from the other end of the extended portion 6c of the one leg portion 6a of the first locking portion. In addition, the second leg portions 6d and 6d have a second locking portion including a second connection portion 6e that connects the tips of the second leg portions 6d and 6d.

  Thus, as shown in FIG. 1, the connecting fitting 7 is inserted between the pair of side plates 1a and 1b of the frame 1, and the pair of extended portions 6c and 6c of the hook locking member 6 are respectively connected to the pair of side plates 1a and 1a. 1b, and the through holes 1d and 1d of the side plates 1a and 1b are aligned with the through holes 6f and 6f of the hook locking member 6 so that the connecting metal fitting 7 and the hook locking member 6 are connected to each other. The pin 8 is connected to the frame 1. Then, as shown in FIG. 3, in the state where the strap winder is connected to the D ring 17 of the body belt 16 by the connecting bracket 7, the first locking portion of the hook locking member 6 is the strap winding drum. 3 when viewed in the direction of the rotary shaft 2, and has a hook-like cross section that opens upward, and the second locking portion is upward when viewed in the direction perpendicular to the rotary shaft 2 of the strap winding drum 3. It has a bowl-shaped cross section that is open at the top.

In this embodiment, the first and second locking portions of the hook locking member 6 are integrally formed. However, they may not be integrally formed, and the hook locking member 6 is formed by a strap winder. A first locking portion having a hook-shaped cross section that opens upward when viewed in the direction of the rotary shaft 2 of the strap winding drum 3 in a state where the strap is connected to the body belt 16 by the connecting metal fitting 7, and the rotary shaft 2 As long as it has a second locking portion having a hook-shaped cross section that is open upward when viewed in a direction perpendicular to the direction, any configuration may be used.
In this embodiment, the hook locking member 6 has a U-shaped or L-shaped cross section. However, the hook locking member 6 may have a curved or bent shape in cross section.

As shown in FIG. 3, the strap winder according to the present invention is connected to the D ring 17 of the body belt 16 of the safety belt for preventing a fall by a connection fitting 7. When the hook 5 is not used, the hook 5 can be selectively hung on the first or second locking portion of the hook locking member 6 of the strap winder. As a result, a sufficient space can be secured for attaching the tool bag 18 and the tape measure 19 to the trunk belt 16 of the operator.
In addition, the frame 1 of the strap winder is usually made of metal and is a main part of the strap winder, and therefore has higher rigidity (strength) than other components. And according to this invention, since the hook latching member 6 was attached to this flame | frame 1, even if hooking and removal of the hook 5 are repeated frequently, a strap winder will not be easily broken.

  FIG. 4 is a view showing a strap winder of a safety belt for preventing a fall according to another embodiment of the present invention, (A) is a front view, (B) is a side view, and (C) is a side view. It is a perspective view of a hook latching member. This embodiment is different from the embodiment shown in FIGS. 1 to 3 only in the configuration of the hook locking member and the configuration of the cover. Therefore, in FIG. 4, the same components as those shown in FIGS.

  In this embodiment, as shown in FIG. 4C, the hook locking member 6 ′ includes a plate-shaped locking member body 6′a having a bowl-shaped cross section and one end side of the locking member body 6′a. And an attachment portion 6'b provided on the head. The attachment portion 6′b is formed in a long and narrow plate shape, and the distal end portion is bent into a cylindrical shape extending from the locking portion main body 6′a, and a connecting pin for connecting the hook locking member 6 ′ to the frame 1 is provided. A through hole 6'c is formed through.

  As shown in FIGS. 4A and 4B, in this embodiment, the hook locking member 6 ′ is connected and fixed to the frame 1, and the locking portion body 6′a is used as a strap winder. In the upper part of the front cover 11 ′, the cover surface is contacted. Thus, the hook locking member 6 ′ opens upward when viewed in a direction perpendicular to the rotary shaft 2 of the strap winding drum 3 in a state where the strap winder is connected to the body belt by the connecting metal fitting 7. Has a bowl-shaped cross section.

  In this embodiment, the front cover 11 ′ and the rear cover 12 ′ are combined to form a casing supported and fixed to the frame 1, and the strap winding drum 3 is accommodated together with a part of the frame 1 in this casing. In addition, a strap doorway (not shown) is formed in the casing.

Also in this embodiment, since the hook locking member 6 ′ is attached to the frame 1, the strap winder is not easily broken even if the hook 5 is repeatedly hooked and removed.
In the embodiment of FIG. 4, the hook locking member 6 ′ is disposed on the front cover side of the strap winder. However, as shown in FIG. 5, the hook locking member 6 ′ is on the rear cover side of the strap winder. It can also be arranged.

1 is an exploded perspective view of a strap winder for a safety belt for preventing a fall according to one embodiment of the present invention. It is a figure which shows the strap winder of FIG. 1, (A) is a front view, (B) is a side view. It is a figure which shows the state with which the strap winder of FIG. 1 was connected with the trunk | drum belt, and was mounted | worn with the operator. It is a figure which shows the strap winder of the safety belt for fall prevention by another Example of this invention, (A) is a front view, (B) is a side view, (C) is a hook latching member FIG. It is a figure which shows the strap winder of the safety belt for a fall prevention by another Example of this invention, (A) is a rear view, (B) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 1a, 1b Side plate 1c Connection member 1d Through-hole 2 Rotating shaft 3 Strap winding drum 4 Strap 5 Hook 6 Hook latching member 6a Leg part 6b Connection part 6c Expansion part 6d 2nd leg part 6e 2nd connection part 6f Through-hole 7 Connecting bracket 8 Connecting pin 9 Substrate 10 Spiral spring 11 Front cover 12 Rear cover 13, 14 Screw 15 Shock absorber 16 Body belt 17 D ring 18 Tool bag 19 Tape measure 20 Worker

Claims (8)

A strap winder for a safety belt for fall prevention with a strap having a hook at the tip,
A frame having a substantially U-shaped or B-shaped cross-section composed of a pair of side plates opposed to each other and a connecting member that connects at least one side edge of the pair of side plates;
A strap take-up drum that is disposed in the inner space of the frame and is attached between the pair of side plates and is rotatable about a rotation axis. The strap take-up drum has one end of the strap. The strap is wound and fixed, and the hook is attached to the tip of the strap,
A hook locking member attached to the frame and capable of locking the hook in a suspended state;
A hook provided on the frame and connected to the waist belt of the fall-preventing safety belt, and the hook locking member is connected to the waist belt by the strap winder. When viewed in the direction of the axis of rotation of the strap winding drum in a state of being up, the first locking portion having a hook-shaped cross section that opens upward, and upward when viewed in the direction perpendicular to the axis of rotation A strap winder comprising: a second locking portion having a hook-shaped cross section that is open to the top.   The strap winder according to claim 1, wherein the first and second locking portions of the hook locking member are integrally formed.   The first locking portion of the hook locking member includes a pair of leg portions bent in a hook shape and a connection portion that connects one end of the leg portions to each other of the leg portions. An extended portion is provided at an end, and the second locking portion is a second leg bent into a pair of hooks protruding from the extended portion of one leg portion of the first locking portion. And a second connecting portion that connects the tips of the second leg portions, and the extension portions of the leg portions of the first locking portion are attached to the pair of side plates of the frame, respectively. The strap winder according to claim 2, characterized in that: A strap winder for a safety belt for fall prevention with a strap having a hook at the tip,
A frame having a substantially U-shaped or B-shaped cross-section composed of a pair of side plates opposed to each other and a connecting member that connects at least one side edge of the pair of side plates;
A strap take-up drum that is disposed in the inner space of the frame and is attached between the pair of side plates and is rotatable about a rotation axis. The strap take-up drum has one end of the strap. The strap is wound and fixed, and the hook is attached to the tip of the strap,
A hook locking member attached to the frame and capable of locking the hook in a suspended state;
A hook provided on the frame and connected to the waist belt of the fall-preventing safety belt, and the hook locking member is connected to the waist belt by the strap winder. The strap winder has a hook-like cross section that opens upward when viewed in a direction perpendicular to the rotation axis of the strap winding drum in a state of being wound.   The hook locking member includes a plate-shaped locking member main body having a hook-shaped cross section and an attachment portion provided on one end side of the locking member main body, and the attachment portion is attached to the frame. The strap winder according to claim 4.   The hook locking member includes a pair of leg portions bent into a bowl shape and a connection portion that connects one ends of the leg portions, and the other end side of the pair of leg portions is a pair of side plates of the frame. The strap winder according to claim 4, wherein the strap winder is attached to each.   The said connection metal fitting is connected with the said flame | frame, The said hook latching member is attached to the connection metal fitting and the connection part of the said frame, The Claim 1 characterized by the above-mentioned. Strap winder.   The strap winding drum is housed together with a part of the frame, and further includes a casing supported and fixed to the frame, and a strap entrance is formed in the casing, and the portion of the frame protrudes from the casing, The strap winder according to any one of claims 1 to 7, wherein a hook locking member and the coupling fitting are attached.

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