JP7426762B1 - Fall prevention equipment - Google Patents

Abstract

【assignment】
The present disclosure has a simple structure and is easy to install, and also stabilizes the state of attachment to the attached member and improves the fall prevention of the attached member.
A fall prevention device 1 includes a bar-shaped member and a claw member 3 having at least two sets of claw parts 7 attached to the bar-shaped member 2 so as to be relatively movable along the longitudinal direction. and a position regulating member 4 that regulates the position of a claw portion 7 movably attached to the bar member 2 in the longitudinal direction with respect to the bar member 2.
[Selection diagram] Figure 1

Description

TECHNICAL FIELD The present disclosure relates to fall prevention equipment.

BACKGROUND OF THE INVENTION Conventionally, for example, devices having the following configuration are known as fall prevention devices for H-section steel.

In the fall prevention device described in Patent Document 1, the upper surface of the upper flange of an H-shaped steel and the lower surface of the upper flange of another H-shaped steel are arranged in parallel and in contact with each other, and the first abutment is attached to a rod-shaped body. By sandwiching and integrating the H section and the second abutting section, the plurality of H-beams are prevented from falling over.

The fall prevention device described in Patent Document 2 connects multiple H-beams even when there is a difference in height using clamps rotatably attached to both ends of a nested pipe whose length can be adjusted. By integrating the H-beams into one piece, it is possible to prevent the multiple H-beams from falling over.

However, in the former fall prevention device, a plurality of H-beams must be arranged in a state where the upper and lower surfaces of the flanges are in contact with each other. For this reason, preliminary preparations for preventing the H-shaped steel from falling using a fall prevention device are complicated.

On the other hand, with the latter fall prevention device, the length of the nested pipe must be adjusted and the flange of the H-beam steel must be gripped with a clamp, so the adjustment work is troublesome. Furthermore, as the number of H-beams increases, the number of fall prevention devices that must be prepared also increases accordingly.

Patent No. 3868478 Japanese Patent Application Publication No. 2003-90131

An object of the present disclosure is to provide a fall prevention device that has a simple structure, is easy to install, and can stabilize the state of attachment to a member to be attached and improve the fall prevention properties of the member to be attached.

As a means for solving the above problems, the present invention provides at least a bar-shaped member and a set of two claws attached to the bar-shaped member so as to be relatively movable along the longitudinal direction of the bar-shaped member . A claw member having two sets , a claw member attached to the rod-shaped member so as to be relatively movable along the longitudinal direction of the rod-shaped member, and a claw part movably attached to the rod-shaped member, A fall prevention device is provided, which includes a position regulating member that regulates the position of the member in the longitudinal direction.

According to the above configuration, by simply moving the claws along the rod-shaped member, clamping the attached member with one set of claws, and regulating the position of the moved claws with the position regulating member, the plurality of attached members can be fixed. Members can be easily connected. Moreover, it has a simple structure in which a plurality of claws are movably attached to a single rod-shaped member and the positions of the claws are regulated by a position regulating member. Furthermore, a single member to be attached can be held between the pair of claws from both sides. Therefore, it is possible to stabilize the attached state and improve the fall prevention of the attached member.
It is preferable that the claw part has a cylindrical part, and the cylindrical part is slidably arranged on the rod-shaped member.
According to the above configuration, the configuration is simple and not only the claw portion alone but also the entire claw portion can have excellent rigidity.
Preferably, the rod-shaped member has a male threaded portion on its outer periphery, and the position regulating member has a female threaded portion that engages with the male threaded portion.

According to the above configuration, the longitudinal position of the position regulating member relative to the rod-shaped member can be changed simply by rotating the position regulating member relative to the rod-shaped member and changing the engagement position of the female threaded portion with respect to the male threaded portion. can. Thereby, it becomes possible to easily regulate the position of the claw portion using the position regulating member.
Preferably, the rod-shaped member has a flat surface that extends in the longitudinal direction and is placed on the attached member.

According to the above configuration, the arrangement state of the rod-shaped member with respect to the attached member can be stabilized. Therefore, the user does not need to perform additional work such as positioning the rod-shaped member, making it possible to improve work efficiency.
Preferably, the female threaded portion includes a handle portion that can rotatably grip the female threaded portion.

According to the configuration, the user can easily rotate the position regulating member by grasping the gripping portion. Moreover, after the user grasps the grip and applies force in the rotational direction, the rotational state of the position regulating member can be continued by inertia force. Therefore, it becomes possible to easily move the position regulating member.
Preferably, the handle portion is slidably attached to the female thread portion.
According to the above configuration, when operating the grip part, it is possible to move it to a position where it is easy to grip and operate by hand.
Preferably, the claw portion includes an inclined surface that follows the shape of the flange portion of the H-shaped steel.
According to the above configuration, it is possible to stabilize the attachment state of the claw portion to the attached member, and it is possible to make the connected state of the attached members strong.
It is preferable that the claw portion is attached so as to be pivotable about a support shaft extending vertically downward when the claw portion is attached to the member to be attached .

According to the above configuration, even if the positional relationship of the plurality of attached members is not parallel but somewhat oblique, it is possible to reliably grip the plurality of attached members by rotating the claw portion. Therefore, it is possible to improve work efficiency without wasting time in arranging the members to be attached.
Further, as a means for solving the problem, the present disclosure provides a rod-shaped member, a first claw portion fixed to the rod-shaped member, and a first claw portion that moves along the longitudinal direction of the rod-shaped member. a first claw member having a second claw portion that is movably attached to the first claw member; a second claw member having at least one set of two second claw parts attached so as to be movable relative to each other; a second claw part of the first claw member; A fall prevention device is provided that includes a position regulating member that regulates the position of each of the second claw portions in the longitudinal direction with respect to the rod-shaped member.

According to the present disclosure, it is possible to have a simple configuration in which the claw member and the position regulating member are simply attached to the rod-shaped member. By holding one member to be attached by one set of claws and connecting the plurality of members to be attached by a plurality of sets of claws, the attached state can be stabilized. Therefore, it is possible to improve the fall prevention of the attached member.

FIG. 1 is a perspective view showing a part of the fall prevention device according to the present embodiment. FIG. 2 is a front view of the fall prevention device shown in FIG. 1. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 4 is a perspective view of the first claw portion of FIG. 1. FIG. 5 is a perspective view of the second claw portion of FIG. 1. FIG. 6 is a perspective view showing an example of a state in which the fall prevention device shown in FIG. 1 is used. FIG. 7 is a side view showing a grip part according to another embodiment. FIG. 8 is a front view showing a claw portion according to another embodiment. FIG. 9 is a side view showing a position regulating member according to another embodiment.

<Embodiment>
Embodiments according to the present disclosure will be described below with reference to the accompanying drawings. In the following explanation, terms indicating specific directions or positions (for example, terms including "top,""bottom,""side," and "edge") will be used as necessary. These terms are intended to facilitate understanding of the invention with reference to the drawings, and the technical scope of the present disclosure is not limited by the meanings of these terms. Further, the following description is essentially only an example, and is not intended to limit the present disclosure, its applications, or its uses. Furthermore, the drawings are schematic, and the ratio of each dimension may differ from the actual drawing.

(Fall prevention device 1)
FIG. 1 is a perspective view of a fall prevention device 1 according to this embodiment, and FIG. 2 is a front view thereof. This fall prevention device 1 includes a rod-shaped member 2, a claw member 3, and a position regulating member 4. The fall prevention device 1 (bar member 2, claw member 3, and position regulating member 4) is preferably made of, for example, general structural rolled steel (SS400, etc.). However, it is also possible to use various other materials as long as the member to be attached is integrated and has sufficient strength to prevent overturning. Furthermore, there are no particular restrictions on the material of the fall prevention device 1 (bar member 2, claw member 3, and position regulating member 4), but examples include metal, synthetic resin, FRP (Fiberglass Reinforced Plastics), carbon, and wood. etc.

(Rod-shaped member 2)
The rod-shaped member 2 is rod-shaped. The rod-shaped member 2 is preferably circular in cross section perpendicular to the axial direction (longitudinal direction) of the rod-shaped member. However, the shape is not limited to a circle, and may be an ellipse, a rectangle, a triangle, a quadrilateral, a pentagon, a hexagon, an octagon, a rhombus, a parallelogram, etc. in the cross section perpendicular to the axial direction (longitudinal direction) of the rod-shaped member. .

The rod-shaped member 2 is composed of a threaded shaft extending from one end toward the other end. A pair of parallel flat surfaces 5 (the lower surface side is not shown in FIG. 1) are formed on the screw shaft so that a part of the male threaded portion 6 is removed. The one (lower surface side) flat surface is used for placing it in surface contact with the upper plane of the flange of the H-section steel 19, which is a member to be mounted, which will be described later. Therefore, only one flat surface 5 (on the lower surface side) may be formed.

(Claw member 3)
The claw member 3 has at least two sets of two claw parts 7 attached to the rod-shaped member 2 so as to be relatively movable along the longitudinal direction. In this embodiment, as shown in FIG. 1, the claw member 3 includes a plurality of sets of claw portions 7 (two sets of claw portions 7 are shown in FIG. 1). In order to prevent the attached member (described later) from falling over, the claw portion 7 is provided between one end and the other end of the attached member (for example, in the case of a flange of H-shaped steel, from the end in the height direction of the web of the H-shaped steel to both sides of the web). They are constructed in pairs so as to sandwich the right flange and left flange that protrude from the sides, respectively. Note that the plurality of sets of claw portions 7 are configured to be movable to positions where they can each hold one attached member. The term "movable" includes not only sliding movement as in this embodiment, but also being detachably fixed at an arbitrary position.

The claw portions 7 include a combination using two of the first claw portions 8 and the second claw portions 9, and a combination using two of the second claw portions 9. In this embodiment, the first claw portion 8 is fixed to one end portion of the rod-shaped member 2. The second claw portion 9 is slidably arranged on the male threaded portion 6 of the rod-shaped member 2 .

A first claw portion 8 is fixed to one end of the rod-shaped member 2, and a second claw portion 9 is arranged at the other end of the rod-shaped member 2. In this embodiment, one first claw part 8 is arranged at one end of the rod-shaped member 2, and three second claw parts 9 are arranged at the other end. For all other combinations, the second claw portion (slidable claw portion) may be used.

As shown in FIG. 4, the first claw portion 8 includes a first fixing plate 10 and a first abutting plate 11 fixed to the first fixing plate 10. The first fixing plate 10 has a flat plate shape and includes a fixing part 10a directly fixed to one end of the rod-shaped member 2 by welding or the like, and an inclined part 10b extending obliquely following the fixing part 10a. The fixing portion 10a and the inclined portion 10b form an inner edge 12 consisting of a first inclined edge 12a and a second inclined edge 12b. The first abutting plate 11 has a flat plate shape, and is bent along a first slanted edge 12a and a second slanted edge 12b to form a first abutting portion 11a and a second abutting portion 11b. . The first contact portion 11a and the second contact portion 11b are fixed to the first inclined edge 12a and the second inclined edge 12b by welding or the like, respectively, and are perpendicular to the first fixed plate 10.

In this way, the weight of the first claw portion 8 is reduced by making the first fixing plate 10 and the first abutting plate 11 flat. The second abutting portion, which is inclined by bending the first abutting plate 11, is formed so as to abut a downwardly inclined surface of an upper flange portion 20 of an H-shaped steel 19, which is a member to be attached, which will be described later. Therefore, the state of attachment to the H-section steel 19 can be stabilized. Since the first fixing plate 10 is orthogonal to the first abutting plate 11, the first abutting plate 11 can be supported with sufficient strength in the direction in which force acts.

As shown in FIG. 5, the second claw portion 9 includes a cylindrical body 13, a second fixing plate 14 fixed to the cylindrical body 13, and a second abutting plate 15 fixed to the second fixing plate 14. It consists of. The cylindrical body 13 is slidably arranged around the rod-shaped member 2, that is, around the outer circumferential portion of the male threaded portion 6. The male threaded portion 6 of the rod-shaped member 2 comes into contact only with the most protruding portion of the thread, and the contact area with the cylindrical body 13 is small, making it less susceptible to frictional resistance. Therefore, the second claw portion 9 can be smoothly moved with respect to the rod-shaped member 2 without applying much force. Note that the second fixing plate 14 and the second abutting plate 15 have the same structure as the first fixing plate 10 and the second abutting plate 15 of the first claw portion 8, so the explanation thereof will be omitted.

(Position regulating member 4)
The position regulating member 4 regulates the position of the claw portion 7 movably attached to the bar-shaped member 2 in the longitudinal direction with respect to the bar-shaped member 2. The position regulating member 4 is configured to regulate the position of the claw portion 7. The position regulating member 4 is provided separately from the claw member 3 (claw portion 7). However, as will be described later, the position regulating member 4 may be provided integrally with the claw member 3 (claw portion 7). The position regulating member 4 may be configured as a part of the claw member 3 to regulate the position of the claw portion 7.

The position regulating member 4 includes a cylindrical portion 16 and a grip portion 17, as shown in FIG. The cylindrical portion 16 has a female threaded portion 18 formed on its inner peripheral surface. The female threaded portion 18 meshes with the male threaded portion 6 of the rod-shaped member 2. By rotating the cylindrical portion 16, the position where the female threaded portion 18 engages with the male threaded portion 6 changes, and the position of the position regulating member 4 relative to the rod-shaped member 2 can be moved in the longitudinal direction. The cylindrical portion 16 has a shape similar to a hexagonal bolt, with an outer peripheral surface composed of six flat surfaces so that the cross section is a regular hexagon. However, the shape of the cylindrical portion is not limited to a regular hexagon in cross section, and may be an ellipse, a rectangle, a triangle, a quadrilateral, a pentagon, a hexagon, an octagon, a rhombus, a parallelogram, etc. in cross section.
The gripping portion 17 is composed of a portion that is welded and integrated with one plane of the cylindrical portion 16, and a portion that extends from the plane by being bent at right angles and is gripped by hand.

The fall prevention device 1 having the above structure is used to connect and integrate a plurality of attached members and prevent them from falling over. The member to be attached is preferably an H-shaped steel. However, the member to be attached may be, for example, an H section steel, an I section steel, a T section steel, a Z section steel, a cross section steel, an angle section steel, a channel section steel, or the like. This embodiment will be explained using H-beam steel as an example.
As shown in FIG. 6, the H-shaped steel 19 is a steel material having an H-shaped cross section and is formed by connecting the center portions of an upper flange 20 and a lower flange 21 with a web 22.
Hereinafter, a method of using the fall prevention device 1 for the purpose of preventing the H-shaped steel 19 from falling will be explained.

A plurality of H-shaped steels 19 are arranged in parallel so that the lower surface of the lower flange 21 is placed on the ground. Further, the positions and intervals of the claws 7 of the fall prevention device 1 are adjusted so that they are located on both sides of the upper flange 20 of the H-shaped steel 19 arranged in parallel.

When this preparation is completed, the tip of the first claw portion 8 on one end side of the bar member 2 is brought into contact with the edge of the upper flange 20 of the H-beam 19. Then, one (lower side) flat surface 5 of the rod-shaped member 2 is brought into contact with the upper surface of the upper flange 20 of the H-beam 19.

Subsequently, the second claw part 9 is moved along the rod-shaped member 2, and the upper flange 20 of the H-shaped steel 19 is sandwiched between the first claw part 8 and the second claw part 9. Then, the user grips the grip portion 17 and rotates the position regulating member 4. When the position regulating member 4 rotates, centrifugal force is applied by the protruding grip portion 17. Therefore, if the gripping member 17 is gripped and a rotational force is applied, the position regulating member 4 continues to rotate due to inertia even if the gripping portion 17 is released.

In this way, when the engagement position with the male threaded part 6 of the rod-shaped member 2 is changed and the position regulating member 4 comes into contact with the second claw part 9, the grip part 17 is grasped and tightened, and the position regulating member 4 The claw portion 9 is pressed against the edge of the upper flange 20 to regulate its position. In this state, the first contact part 11a of the first contact plate 11 of the first claw part 8 contacts one edge of the upper flange 20, and the second contact part 11b contacts the lower part of one of the upper flanges 20. Contact with an inclined surface. Further, the first contact portion 15a of the second contact plate 15 of the second claw portion 9 contacts the other edge of the upper flange 20, and the second contact portion 15b contacts the other downwardly inclined surface. Therefore, the fall prevention device 1 is firmly attached to the upper flange 20 with the rod-shaped member 2, the first claw portion 8, and the second claw portion 9 in contact with the upper flange 20.

In the other H-beams 19, the corresponding pair of second claws 9 are moved along the rod-shaped member 2 to sandwich the upper flange 20 of each H-beam 19. In this case, the position regulating member 4 is rotated with respect to each second claw portion 9 to regulate the position in the same manner as described above. Thereby, the fall prevention device 1 is firmly attached to the upper flange 20 of the H-shaped steel 19 by the pair of second claws 9, respectively. By sandwiching the upper flanges 20 of all the H-shaped steels 19 between each pair of claws 7, all the H-shaped steels 19 can be integrated by the fall prevention device 1.

In this way, the fall prevention device 1 according to the present embodiment is constructed by simply attaching the claw portion 7 to the rod-shaped member 2 in a slidable manner and engaging the female threaded portion 18 of the position regulating member 4 with the male threaded portion 6 of the rod-shaped member 2. It has a simple configuration. As a preliminary preparation, it is only necessary to arrange the H-beams 19 in parallel. The installation work can be easily completed by simply moving the claw portion 7 along the rod-shaped member 2 and rotating and tightening the position regulating member 4. In addition, all the H-beams 19 can be individually fixed by the pair of claws 7 to form an integrated state. For this reason, it becomes possible to easily obtain a state in which the H-shaped steel 19 has excellent fall prevention properties.

<Other embodiments>
Note that the present disclosure is not limited to the configurations described in the embodiments, and various changes are possible. In the embodiment described above, the H-beam 19 has been described as an example of the member to which the fall prevention device 1 is attached. Similarly, when using the fall prevention device 1 according to the embodiment described above, falls can be effectively prevented for other steel materials such as shape steel, angle steel, and channel steel. Further, although no particular mention was made regarding the size of the steel material, it is possible to accommodate various existing steel materials. The length of the rod-shaped member 2 and the size of the claw portion 7 may be changed depending on the number and size of steel materials.

In the embodiment described above, the position regulating member 4 has a structure in which the gripping part 17 is fixed to the cylindrical part 16, but as shown in FIG. On the other hand, it may be attached so as to be slidable in the axial direction of the gripping part 17. It is preferable that the gripping portion 17 be positioned at two locations on opposite sides of the tube portion 16 protruding from the cylinder portion 16, since the gripping portion 17 can be moved to a position where it can be easily gripped.

In the embodiment described above, the claw portion 7 is fixed, but as shown in FIG. 8, it may be configured to be pivotable about the support shaft 7a. According to this, even if the members to be attached are not arranged parallel to each other and even if they are somewhat slanted, they can be sandwiched from both sides by rotating the claw portion 7. This makes it possible to further improve workability.

In the embodiment described above, the position regulating member 4 is provided separately from the second claw part 9, but as shown in FIG. 9, the cylindrical body 13 of the second claw part 9 is The inner circumferential surface of the cylindrical body 13 may be brought into pressure contact with the outer circumferential surface of the rod-shaped member 2 by dividing it into two parts that can be opened and closed and tightened with fasteners such as bolts 13b and nuts 13c.
Furthermore, in another example, a wedge may be inserted inside the cylindrical body to regulate the position of the cylindrical body (claw portion). The position may be regulated by other means.

1... Fall prevention device 2... Rod-shaped member 3... Claw member 4... Position regulating member 5... Flat surface 6... Male screw part 7... Claw part 8... First claw part 9... Second claw part 10... First fixing plate 11... First abutting plate 12...Inner edge 13...Cylindrical body 14...Second fixing plate 15...Second abutting plate 16...Cylinder part 17...Gripping part 18...Female thread part 19...H-shaped steel 20...Upper flange 21...Lower Flange 22...web

Claims (9)

a rod-shaped member;
A claw member having at least two sets of claw portions attached to the rod-shaped member so as to be relatively movable along the longitudinal direction of the rod-shaped member, a claw member attached so as to be relatively movable along the longitudinal direction ;
a position regulating member that regulates the position of a claw movably attached to the rod-shaped member in the longitudinal direction with respect to the rod-shaped member;
A fall prevention device equipped with. The fall prevention device according to claim 1, wherein the claw portion has a cylindrical portion, and the cylindrical portion is slidably arranged on the rod-shaped member. The rod-shaped member has a male threaded portion on the outer periphery,
The fall prevention device according to claim 1, wherein the position regulating member has a female threaded portion that engages with the male threaded portion. The fall prevention device according to any one of claims 1 to 3, wherein the rod-shaped member has a flat surface that extends in the longitudinal direction and is placed on an attached member. The fall prevention device according to claim 3, wherein the female thread member includes a handle portion that can grip the female thread member in a rotationally operable manner. The fall prevention device according to claim 5, wherein the handle portion is slidably attached to the female threaded member. The fall prevention device according to claim 1, wherein the claw portion includes an inclined surface that follows the shape of the flange portion of the H-shaped steel. The fall prevention device according to claim 1, wherein the claw portion is attached to be rotatable about a support shaft extending vertically downward when it is attached to a member to be attached . a rod-shaped member;
a first claw member having a first claw portion fixed to the rod-shaped member; and a second claw portion movably attached to the first claw portion along the longitudinal direction of the rod-shaped member;
A pair of claw members are attached to the first claw member so as to be movable along the longitudinal direction of the rod-shaped member, and are attached to be movable relative to the rod-shaped member along the longitudinal direction of the rod-shaped member. a second claw member having at least one set of second claw portions;
a position regulating member that regulates the position of each of the second claw part of the first claw member and the second claw part of the second claw member in the longitudinal direction with respect to the rod-shaped member;
Equipped with
Fall prevention equipment.