JP2797082B2 - Handrail bar for fall prevention - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handrail bar for preventing a fall from being provided in a building scaffold used for construction or repair of a building.

[0002]

2. Description of the Related Art Conventionally, when building or repairing a high-rise building, a scaffolding device has been assembled along the outer wall of the building. As such a scaffolding device, for example, a gate-shaped building frame is used in which the upper ends of front and rear columns having a certain height are integrally connected with a connecting rod, and this building frame is connected vertically and vertically, and fixed. Then, assemble to the desired height and width, further lay a scaffold plate between the connecting rods of the building frames facing left and right, and intersect braces between the columns facing the left and right sides of these building frames in an X-shape, and A structure in which the part is fixed to a column is widely used.

[0003]

However, even if the brace is attached between the columns of the building frame in an X-shape as described above, the distance between the right and left adjacent columns is usually as large as 1800 mm, and the distance from the scaffolding plate is large. 900m to the brace intersection
m, and the opening surrounded by the scaffold and the brace is large, and there is a danger that workers may fall as they pass through this opening, which is extremely dangerous and reduces the work efficiency on the scaffold. There was a problem of doing.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to prevent an accidental fall of an operator by installing between braces so that work can be performed safely and efficiently. An object of the present invention is to provide a handrail bar for drop prevention that can easily and reliably mount a brace.

[0005]

In order to achieve the above object, a fall prevention handrail bar according to the present invention is provided between a brace mounted crosswise in an X-shape between both side supports of a scaffolding device. A handrail bar, and brace locking members are attached to the front surfaces of both ends of the bar main body. The brace locking members are fixed to the plate-shaped metal fitting and the upper end of the plate-shaped metal fitting, and the brace is inserted from the inside. An upper hook body having an opening to be inserted and a brace engaging portion for receiving the inserted brace portion; and an upper hook body fixed to the lower end of the plate-shaped bracket at a distance larger than the diameter of the brace from the upper hook body. A lower hook having an opening for inserting the brace from the outside and a brace locking portion for receiving the inserted brace portion, and the brace locking portion being positioned below the brace locking portion of the upper hook body The one brace locking member is fixed to the front surface of one end of the beam main body, and the other brace locking member is rotatable and fixable on a vertical surface with respect to the front surface of the other end of the beam main body. It is structured to be attached.

According to a second aspect of the present invention, there is provided a structure in which both brace locking members attached to both ends of a beam main body are rotatably and fixedly mounted on the front surfaces of both ends of the beam main body in a vertical plane. And

As a mounting means for rotating and fixing the brace locking member to the front surface of the end of the beam main body, the brace locking member is provided at the center of the rear surface of the plate-shaped metal fitting. A concave arc-shaped engaging surface that engages with the front peripheral portion of the crosspiece main body is formed over the entire length, and the center portion of the plate-shaped metal fitting is rotatably mounted on the front end portion of the bolt body penetrating in the front-rear direction of the crosspiece main body. It has a structure in which a spring is press-fitted between a nut body which is pivotally attached and screwed to a bolt body projecting rearward from the beam main body and a rear surface of the beam main body.

The most preferable shape of the upper and lower hook members of the brace locking member is a shape bent in a U-shape in the horizontal direction, and the bent portion is formed by a brace member. The brace insertion opening is formed between the arm pieces that are formed in the stopper and that protrude in parallel from the bent part.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The above-mentioned handrail bar for drop prevention is mounted in a state of being bridged between lower ends of braces which are connected in an X-shape between columns of scaffolding devices adjacent to each other on the left and right sides. When the brace locking member provided on one end side of the beam main body is fixed to the beam main body, first, the beam main body is moved along the length direction of the brace and the upper and lower portions of the brace locking member are moved. After facing the gap between the hook bodies so as to be in parallel with the lower end of one of the braces, insert the gap into the lower end of the brace, and then lower the beam main body until it is horizontal. The brace portion between the upper and lower hook bodies is received by the hook body from the inside for the upper hook body and received by the brace locking portion, and is received by the hook body from the outside for the lower hook body, This brace locking member One end of the 桟主 body is mounted in a state retained in the lower end of the brace.

Next, the plate-shaped metal fitting of the brace locking member provided on the other end side of the beam main body which has been lowered to the horizontal state is rotated around the bolt body so as to cross the beam main body. After the upper and lower hooks are directed in the length direction of the other brace, the space between the upper and lower hooks is inserted into the lower end of the brace, and then the plate-shaped metal fitting is turned to the original position. Upon returning to motion, the brace portion between the upper and lower hook bodies is received in the hook body from the inside with respect to the upper hook body and received by the brace locking portion, and the hook body from the outside with respect to the lower hook body. And the other end of the beam main body is attached to the lower end of the brace by the brace locking member so as not to come off.

When the brace locking member rotatably attached to the crosspiece main body is attached to the brace as described above, the plate-shaped metal fitting is rotated so as to intersect the crosspiece main body. And, the plate-shaped bracket moves forward against the spring force while the back concave arc-shaped locking surface of the plate-shaped bracket, which has been closely engaged with the end front peripheral surface of the beam main body, comes off the beam main body, In this state, after inserting the gap between the upper and lower hooks into the lower end of the brace, when the plate-shaped metal fitting is rotated in the opposite direction, the concave arc-shaped locking surface is locked to the front peripheral surface of the beam main body by the spring force. Then, the brace locking member is fixed.

When the handrail bar is mounted between the lower ends of the X-shaped braces in such a manner that the handrail bar is erected, the opening (space) surrounded by the both-side columns and the brace is divided into two parts. This makes it possible to prevent the worker from slipping off the scaffold plate and falling by the handrail bar.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a steel bar or a hard synthetic resin tube having a fixed length. Brace locking members 2 and 3 are provided, and these brace locking members 2 and 3 are connected between left and right columns P and P of the scaffolding device.
Braces B, B that connect the columns by crossing in a letter shape
It is configured to be detachably engaged with the lower end of the.
In addition, the length of the beam main body 1 is formed shorter than the interval between the both-side columns P, P.

Each of the brace locking members 2 and 3 comprises a plate-shaped metal member 4 and a pair of upper and lower hook members 5 and 6 fixed to the plate-shaped metal member 4. 1 (longitudinal direction), a concave arcuate engagement surface 4a is formed on the back surface which is in close contact with the front peripheral portion of the crosspiece main body 1. On the other hand, the upper and lower hook bodies 5, 6 are formed in a plane U-shape formed by projecting front and rear arm pieces 5a, 5b; 6a, 6b each having a fixed length in parallel from both ends of the semicircular bent portion. The front and rear arm pieces 5a and 5b and the space between 6a and 6b are formed in openings 7 and 8, respectively, into which the brace B can be inserted.
Respectively.

Further, the upper hook body 5 has an opening 7 directed toward the center (inside) in the longitudinal direction of the crosspiece main body 1 and a rear arm piece 5a on the front upper end of the plate-shaped metal fitting 4. The lower hook body 6 is fixed by welding, and the opening 8 of the lower hook body 6 is directed to the end face side (outside) in the length direction of the beam main body 1 which is opposite to the opening 7 of the upper hook body 5. At the same time, there is an interval 11 larger than the diameter of the brace B from the upper hook body 5, and the upper hook body 5 is inclined such that the brace locking portions 9, 10 of the upper and lower hook bodies 5, 6 are vertically opposed. The rear arm 6a is fixed to the lower end of the front surface of the metal plate 4 on the outer side by welding.

The brace locking member 2 configured as described above,
3, the plate-shaped metal member 4 of one of the brace locking members 2 is fixed by welding or fixing means such as a screw with the concave arc-shaped locking surface 4a in close contact with the front peripheral surface of one end of the crosspiece main body 1. In this fixed state, the upper and lower hook members 5 and 6 protrude forward from above and below the front peripheral surface of one end of the beam main body 1 in parallel. Further, the other brace locking member 3 is configured such that the plate-shaped metal member 4 is in a state where the concave arc-shaped locking surface 4a is brought into close contact with the front peripheral surface of the other end portion of the crosspiece main body 1, and the central portion of the plate-shaped metal member 4 A bolt body penetrating between the front and rear peripheral surfaces at the other end of the beam main body 1 in a hole 4b (shown in FIG.
The coil spring 13 is attached to the bolt body 12 which is rotatably mounted on a vertical surface around the bolt body 12 by projecting the bolt body 12 from the rear peripheral surface of the beam main body 1. The coil spring 13 is compressed between a nut body 14 screwed to the bolt body 11 and the rear peripheral surface of the beam main body 1, and the plate-like metal fitting 4 is moved by the spring force to the front peripheral surface of the beam main body 1. Is pressed against. In this pressed state, the upper and lower hook members 5, 6 of the brace locking member 3 are set.
Project in parallel from above and below the front peripheral surface of the other end of the beam main body 1 toward the front.

[0017] The drop-prevention handrail bar constructed as described above is installed between the lower ends of the braces of the scaffolding device assembled along the outer wall surface of a high-rise building when building or repairing the building. It is used as a handrail for workers and also to prevent them from falling. As shown in FIG. 2, the scaffolding device uses a gate-shaped building frame A in which the front and rear struts P, which have a certain height, are integrally connected to each other by connecting rods D between upper ends thereof. Up and down,
Connect left and right, fix and assemble to the desired height and width, and
Scaffolding plate E between connecting bars D, D of building frames A, A facing left and right
Are constructed, and braces B, B are crossed in an X-shape between the columns facing the left and right of the building frames A, A, and both ends thereof are fixed to the columns.

In order to install the above-described handrail bar for drop prevention between the lower ends of the braces B, B connected in an X-shape between the columns of the scaffolding device, first, the handrail bar is fixed to one end of the bar main body 1. The upper and lower hook members 5, 6 of the brace locking member 2 are locked to the lower end of one brace B. In this case, since the upper and lower hook bodies 5 and 6 are fixed to the plate-shaped metal fitting 4 with the openings 7 and 8 directed in the length direction of the crosspiece main body 1, the crosspiece main body 1 is fixed.
After the gap 11 between the upper and lower hook bodies 5 and 6 is made to face the lower end of the brace B along the length direction of the brace B, the gap 11 is inserted into the lower end of the brace B. insert.

After that, when the beam main body 1 is lowered to the lower end side of the other brace B until it becomes a horizontal state, the space 11
The lower end of the brace B inserted into the upper hook body 5 is received in the hook body 5 through the opening 7 from the inside with respect to the upper hook body 5 and then received by the brace locking portion 9, while the lower hook body 6 is received. Is received in the hook body 6 through the opening 8 from the outside. In this case, the lower end of the brace B does not necessarily need to be received by the brace engaging portion 10 of the lower hook body 6. In this manner, one end of the beam main body 1 is attached and locked to the lower end of one of the braces B in a state where it is prevented from falling off.

Next, the upper and lower hook members 5 and 6 of the other brace locking member 3 provided at the other end of the beam main body 1 are locked to the lower end of the other brace B. At this time, the main body 1
Has reached from the lower end of one brace B to the lower end of the other brace B, but since the beam main body 1 is in a horizontal state, it is provided in parallel with the length direction of the beam main body 1. The upper and lower hook members 5 and 6 of the brace locking member 3 are opposed to the other brace B in an intersecting state, and therefore, in this state, the gap 11 between the upper and lower hook members 5 and 6 is connected to the lower end of the brace B. Can not be inserted into the part.

For this purpose, the plate-shaped metal fitting 4 of the brace locking member 3 is rotated about the bolt body 12 so that the upper and lower hook bodies 5 and 6 are parallel to the length direction of the brace B, and the gap between the upper and lower hook bodies 5 and 6 is adjusted.
11 is inserted into the lower end of the brace B. At this time, since the plate-shaped metal fitting 4 has pressed the concave arc-shaped engaging surface 4a on the back surface thereof into a fixed state by the pressure of the coil spring 13 on the front peripheral surface of the brace locking member 3, by loosening the nut body 14, After the pressing force is reduced, the plate-shaped metal member 4 is rotated or the plate-shaped metal member 4 is rotated against the force of the coil spring 13 to lock the concave arc-shaped engagement surface 4a. The brace locking member 3 is removed from the front peripheral surface of the member 3 so as to intersect with the longitudinal direction of the beam main body 1, and the space 11 between the upper and lower hook bodies 5 and 6 is parallel to the lower end of the brace B. To be.

In this state, the gap 11 between the upper and lower hooks 5 and 6 is inserted into the lower end of the brace B, and the plate-like metal fitting 4 is again returned to the original position in the longitudinal direction of the beam main body 1. When rotated and returned in the opposite direction to the above, the lower end of the brace B inserted into the space 11 is received into the hook body 5 through the opening 7 from the inside with respect to the upper hook body 5. The lower hook body 6 is received in the hook body 6 from the outside through the opening 8 while being received by the brace locking portion 9. Also in this case, the lower end of the brace B does not necessarily need to be received by the brace engaging portion 10 of the lower hook body 6. In this way, both ends of the beam main body 1 are erected between the lower ends of both the braces B, B in a state where they can be prevented from falling off. In this state, as shown in FIG. 2, the height of the triangular opening C surrounded by the braces B intersecting in the X-shape and the lower halves of the braces B intersecting between the columns P on both sides of the scaffolding device. The beam main body 1 is disposed at the center in the vertical direction, and the opening C is divided into upper and lower parts by the beam main body 1, and this handrail bar prevents the worker from slipping off the scaffold plate and falling. Is what you can do.

In the above embodiment, the plate-shaped metal member 4 of the brace locking member 2 provided at one end of the beam main body 1 is fixed to the beam main body 1 by welding or the like. As in the case of the brace locking member 3 provided on the end side, the plate-shaped metal fitting 4 may be rotatably attached to one end of the beam main body 1 by a bolt body 14. In this manner, the brace locking members 2 and 3 are attached to the plate-shaped
When the main body 1 is installed between the lower ends of the braces B, B, the main body 1 is attached to one side as described above. Of the beam main body 1 without the need to make the space 11 between the upper and lower hook bodies 5 and 6 at one end side of the brace locking member 2 parallel to the brace B. In a state in which both ends correspond to the lower ends of the braces B on both sides, one of the brace locking members is locked to the lower end of the corresponding brace B by the same rotation operation as described above, and then the other. By locking the brace locking member at the lower end of the other brace B, the beam main body 1 can be easily connected to the brace B,
It can be installed between B.

The upper and lower hook members 5, 6 fixed to the plate-shaped metal fittings 4 of the brace locking members 2, 3 are bent in a plane U-shape. It may be formed so that the end is fixed to the plate-shaped metal fitting 4 and only the front arm piece is provided so that the brace B is inserted between the arm piece and the plate-shaped metal fitting 4.

[0025]

As described above, according to the handrail bar for drop prevention of the present invention, the brace provided at both ends of the beam main body is provided between the braces attached in a crossing manner in an X shape between the columns of the scaffolding device. Since the locking member is configured to be locked, the large opening formed between the braces can be bisected by the handrail bar to prevent the worker from dropping from the opening, which is safe and The work can be performed efficiently.

Further, the brace locking members provided at both ends of the crosspiece main body receive the plate-shaped metal fitting, an opening fixed to the upper end of the plate-shaped metal fitting to insert the brace from the inside, and the inserted brace portion. An upper hook body having a brace engaging portion for stopping, an opening fixed to the lower end of the plate-shaped metal fitting with an interval larger than the diameter of the brace from the upper hook body, and allowing the brace to be inserted from outside; And a lower hook body having the brace locking portion positioned below the brace locking portion of the upper hook body. After inserting the lower end of the brace into the space between the hooks, rotate the entire brace locking member in the direction intersecting the brace, and easily insert the lower end of the brace into the upper and lower hooks. Locked to it can, in which the handrail crosspiece with erection work of the handrail bars can be easily can be laid firmly and stably in a state retained from brace for between braces.

[Brief description of the drawings]

FIG. 1 is a perspective view of a handrail bar,

FIG. 2 is a simplified perspective view showing a state of being installed between braces,

FIG. 3 is a partially omitted rear view showing the erected state;

FIG. 4 is a plan view thereof,

FIG. 5 is a vertical cross-sectional side view showing a locked state of one end side brace locking member of the crosspiece main body.

FIG. 6 is a longitudinal sectional side view showing a locking state of a brace locking member on the other end side of the beam main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crosspiece main body 2, 3 Brace locking member 4 Plate metal fitting 5, 6 Hook body 7, 8 Opening 9, 10 Locking part 11 Spacing part 12 Bolt body 13 Spring

Claims (4)

(57) [Claims] 1. A handrail bar for drop prevention, which is installed between braces crossed in an X-shape between both struts of a scaffolding device, wherein brace locking members are attached to the front surfaces of both ends of the main bar. An upper hook having a plate-shaped metal fitting, an opening fixed to the upper end of the plate-shaped metal fitting for inserting the brace from the inside, and a brace locking part for receiving the inserted brace portion. An opening for allowing the brace to be inserted from the outside by being fixed to the lower end of the plate-shaped bracket with an interval larger than the diameter of the brace from the upper hook body, and a brace engaging portion for receiving the inserted brace portion And a lower hook body having the brace locking portion positioned below the brace locking portion of the upper hook body, and one of the brace locking members is fixed to the front surface of one end of the crosspiece main body. A handrail bar for drop prevention, wherein the other brace locking member is rotatably and fixedly mounted on a vertical surface with respect to the front surface of the other end of the bar main body. 2. A drop-prevention handrail bar erected between braces attached in an X-shape between both side columns of a scaffolding device, wherein brace locking members are attached to the front surfaces of both ends of the bar main body. An upper hook having a plate-shaped metal fitting, an opening fixed to the upper end of the plate-shaped metal fitting for inserting the brace from the inside, and a brace locking part for receiving the inserted brace portion. An opening for allowing the brace to be inserted from the outside by being fixed to the lower end of the plate-shaped bracket with an interval larger than the diameter of the brace from the upper hook body, and a brace engaging portion for receiving the inserted brace portion And a lower hook body having the brace locking portion positioned below the brace locking portion of the upper hook body. Both of the brace locking members are respectively provided on the front surfaces of both ends of the crosspiece main body. A handrail bar for drop prevention, characterized in that it is rotatably and fixedly mounted on a vertical surface. 3. A mounting means for rotatably and fixedly attaching a brace locking member to the front surface of an end portion of the crosspiece main body is engaged with a front peripheral portion of the crosspiece main body at the center of the back surface of the plate-like metal fitting of the brace locking member. And the central portion of the plate-shaped metal fitting is rotatably pivotally attached to the front end of a bolt body penetrating in the front-rear direction of the crosspiece main body. The handrail bar for drop prevention according to claim 1 or 2, wherein a spring is press-fitted between the nut body screwed to the protruding bolt body and the rear surface of the bar main body. 4. An upper and lower hook body of a brace locking member,
It has a shape bent in a U-shape in the horizontal direction, and the bent portion is formed in a brace engaging portion, and between the arm pieces protruding in parallel from the bent portion is formed in the brace insertion opening. The handrail bar for drop prevention according to claim 1 or 2, characterized in that: