JP5182014B2 - Scaffolding with handrail - Google Patents

Description

  The present invention relates to a scaffold with a handrail constructed for performing maintenance work or the like in a factory.

As scaffolds with handrails constructed to perform maintenance work etc. in the factory, there are those constructed between suspension members over the equipment or equipment existing on the floor of the factory. The thing used for an overhead conveyor is mentioned as an example.
This overhead conveyor handrail scaffolding is composed of a combination of a scaffold member having a function as a scaffold during maintenance work and the like and a function of receiving falling objects from the conveyor, and a handrail member for preventing a worker from falling. It is supported by a suspension member that hangs down from an auxiliary beam that is installed to be orthogonal to the main beam.

Such a platform with handrails is limited in space due to the presence of equipment or equipment on the floor, so the handrail member is connected and fixed to the scaffold member on the ground, and the entire platform with the handrail is lifted by a chain block or the like. In many cases, it is not possible to secure a space for connecting and fixing the suspension member.
Therefore, in such a case, first, an operation of lifting only the scaffold member with a chain block or the like and attaching it to the suspension member is performed. An operation of connecting and fixing the raised handrail member to the left and right of the scaffold member is performed.

In addition, it is not a scaffold with a handrail used in a factory, but as a corridor floor panel with a handrail that protrudes from the outdoor side of the outer wall of a house, a handrail handrail is erected on the protruding edge of the corridor floor panel body. By attaching a support body that supports the base end of the column rotatably around the rotation pin to the corridor floor panel body, the handrail can be folded and raised with respect to the corridor floor panel body, and the handrail of the handrail in an upright state There is one in which the base end of the column can be fixed to the support with a fixing bolt (for example, see Patent Document 1).
Furthermore, although it is not a scaffolding with a handrail used in the factory, as a portable trap used as a temporary trap, the left and right stair main girders having a stair step board and the stair main girder are folded on the stair step board. There are left and right handrails attached to each other, and a guide sleeve that is externally fitted to the handrail and slidable in the longitudinal direction thereof, and that holds each handrail in an upright position by sliding to a lowered position (for example, (See Patent Document 2).

Japanese Utility Model Publication No. 6-4201 (FIGS. 1-3) Japanese Utility Model Publication No. 64-2848 (Fig. 1-6)

In the existing scaffolding with handrails installed in the sky above equipment and equipment on the factory floor, the worker who rides on the scaffold member without the handrail member places the handrail member on the left and right of the scaffold member. Since it is necessary to perform work at heights that are connected and fixed, there is a risk of falling during such height work.
Here, if a foldable configuration such as Patent Document 1 or Patent Document 2 is used as a scaffold with handrails installed in the sky in the state where devices and equipment exist on the floor of the factory, the handrail member is folded. After the scaffold member is connected and fixed to the suspension member while avoiding interference with the equipment, etc. as a state, the handrail is formed as soon as the handrail member is raised, so that the operator attaches the handrail member to the scaffold member. Since there is no need to perform a work at heights that are connected and fixed to the left and right, the risk of a worker performing work at heights falling can be reduced, and since the handrail member is not bulky by being folded, Space efficiency during storage is increased.

However, in the case of adopting a foldable configuration as in Patent Document 1, it is necessary to save space in the folded state. Therefore, the vertical direction of the support attached to the scaffold member (hallway floor panel body) The base end portion (lower end portion) of the handrail support column is supported by the support so as to be rotatable around the rotation pin, and the base end portion of the handrail support column is fixed to the support body with a fixing bolt. Since the handrail member is held in an upright state by being used and fixed, even if the base end portion is fixed to the support body in a state where the handrail member is raised, an operator crawls and leans on the handrail At this time, the handrail member easily falls to the outside, and sufficient safety cannot be ensured when performing maintenance work or the like at a high place.
Therefore, since it is necessary to reinforce in order to increase the strength and rigidity in the direction in which the handrail member falls outward, the cost for this reinforcing structure increases.

Further, when the foldable configuration as in Patent Document 2 is adopted, there are the same problems as in Patent Document 1, and pivots by L-shaped holes and pins formed in the upper and lower portions of a plurality of guide sleeves. Since it is necessary to provide the upper and lower pivot fittings that are worn and the guide sleeve fixing pin that is fixed to the upper and lower pivot fittings and engages with the L-shaped hole, the cost further increases.
Therefore, when the foldable configuration as in Patent Document 1 or Patent Document 2 is employed as a scaffold with handrails installed in the sky in the state where devices and equipment exist on the floor of the factory, the above-described action Although effective, there is room for improvement from the viewpoint of ensuring sufficient safety when performing maintenance work or the like at a high place without increasing costs.

  Therefore, in view of the above-described situation, the present invention intends to solve the problem that it is possible to easily secure the necessary strength after installation with a simple configuration, so that maintenance work and the like can be performed at a high place without increasing costs. The present invention is to provide a scaffolding with a handrail that can secure a sufficient safety when performing, and that is capable of folding the handrail member with respect to the scaffold member.

  The scaffold with a handrail according to the present invention is a scaffold with a handrail constructed between the front and rear, left and right suspension members to solve the above-mentioned problem, and is a rectangular horizontal step board extending in the front and rear direction, and the left and right sides of the horizontal step board. A scaffolding member made of a pair of left and right angle members extending in the front-rear direction and attached to the opposite ends with horizontal pieces extending inward in the left-right direction and the vertical piece extending upward, and at least two upper and lower horizontal members extending in the front-rear direction. A pair of left and right handrail members comprising a housing and a connecting housing that connects these upper and lower horizontal housings, and a lower horizontal housing of the handrail member, or the lower horizontal housing and the connecting body are connected to and integrated with the handrail member. In such a state that the horizontal shaft body provided in the lower side and extending in the front-rear direction is positioned on the inner side in the left-right direction of the vertical piece of the angle member, the lower horizontal housing or the horizontal shaft body is a rotating shaft. A U-bolt for attaching the lower horizontal housing or horizontal shaft body to the vertical piece, and a fixing means for fixing the handrail member standing on the upper side of the rotating shaft to the suspension member. It is.

According to the scaffolding with a handrail according to the present invention, it is a scaffolding with a handrail constructed between the front, rear, left and right suspension members, and a rectangular horizontal tread extending in the front-rear direction, and left and right ends of the horizontal tread Scaffolding members made of a pair of left and right angle members extending in the front-rear direction, attached so as to follow the horizontal pieces extending inward and the vertical pieces extending upward, at least two upper and lower horizontal frames extending in the front-rear direction, and upper and lower A pair of left and right handrail members comprising a connecting housing that connects the horizontal housing, and a lower horizontal housing of the handrail member, or a lower side thereof connected to the lower horizontal housing and the connecting body so as to be integrated with the handrail member. The horizontal shaft body extending in the front-rear direction provided on the horizontal member is positioned on the inner side in the left-right direction of the vertical piece of the angle member so that the lower horizontal housing or the horizontal shaft body serves as a rotation shaft. Since a U-bolt for attaching a flat rod body or a horizontal shaft body to the vertical piece and a fixing means for fixing the handrail member standing on the upper side of the rotating shaft to the suspension member, By rotating the left and right handrail members around the pivot axis in the front-rear direction and keeping them folded horizontally, the entire scaffold with handrails can be avoided while avoiding interference with equipment or equipment existing on the factory floor. It can be lifted by a chain block or the like and attached to the suspension member.After the attachment work, if the worker who gets on the scaffolding member raises the handrail member, a handrail is formed immediately. In the formed state, the operator can perform an operation of fixing the handrail member to the suspension member by the fixing means.
Therefore, there is no height work for attaching the left and right handrail members to the scaffold member, which is performed by an operator who rides on the scaffold member without standing left and right handrail members, and the worker who performs the high place work crashes. Can reduce the risk.
In addition, in a stand alone with a handrail, the left and right handrail members can be rotated around the rotation axis in the front-rear direction with respect to the scaffold member, and can be folded substantially horizontally. The space efficiency during transportation or storage is increased.

Furthermore, since the handrail member is fixed to the suspension member by the fixing means, even when the operator crawls and leans on the handrail, the handrail member is hard to fall outward and easily has sufficient fall strength and rigidity. Therefore, it is possible to improve safety when performing maintenance work or the like at a high place.
Furthermore, the fixing means for fixing the handrail member to the suspension member can be realized by a simple structure, and the structure that allows the handrail member to be folded is a combination of an angle member and a U bolt, or a lower horizontal housing or a horizontal member. A simple structure that rotates the left and right handrail members with the shaft body as the rotation axis, which realizes a structure with a handrail that has high strength in the installed state and can fold the left and right handrail members against the scaffold member. However, the cost does not increase.
In addition, in a state where the scaffolding with the handrail is installed between the suspension members and the installation is completed, the connection piece integrated with the handrail member connecting frame or the handrail member with respect to the vertical pieces of the left and right angle members is Because it is in contact with the inner side in the left-right direction, and one of the left and right connecting housings or connecting bodies tries to rotate around the rotation axis in a direction away from the vertical piece, the other connecting housing or connecting body is pressed against the vertical piece. Since the swinging of the scaffold member in the left-right direction is suppressed, the stability of the scaffold when the worker who rides on the scaffold with a handrail supported by the suspension member performs the maintenance work or the like increases.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. .
In the present specification, the direction in which the scaffolding 1 with a handrail extends is the front-rear direction (the arrow A in the figure is the front), the left and right are the front, and the view seen from the left is a front view. And
In addition, the handrails 7 and 8 are up, down, left and right with respect to the standing state.

  FIGS. 1-6 is a figure which shows the state which erected between the front and rear, right and left suspension members 21, ..., 22, ... by the scaffold 1 with a handrail which concerns on embodiment of this invention, FIG. 1 is a perspective view, 2 is a front view, FIG. 3 is a plan view, FIG. 4 is a longitudinal sectional view as seen from the rear, FIG. 5 is a longitudinal sectional view as seen from the rear showing an enlarged main part, and FIG. 6 is an arrow X in FIG. It is -X sectional drawing and shows the fixing means 14. FIG.

  As shown by an arrow B in FIGS. 4 and 5, the handrail scaffold 1 is erected with the left and right handrail members 7 and 8 folded inward in the left-right direction with respect to the scaffold member 2 (two-dot chain line). As shown in FIGS. 1 to 3, for example, left and right hanging members 21, 21 hanging from an auxiliary beam laid so as to be orthogonal to the main beam of the building, as shown in FIGS. 1 to 3. The vertical pieces 4B and 5B front and rear portions of the left and right angle members 4 and 5 extending in the front-rear direction are connected to the connection pieces 19 and 19 at the lower end portion and the connection pieces 20 and 20 at the lower end portions of the right and left suspension members 22 and 22, respectively. The fixing operation is completed by fixing the left and right handrail members 7, 8 to the left and right suspension members 21, 22,... By the fixing means 14,.

As shown in FIGS. 1 to 3, the scaffold member 2 includes an expanded metal 3 that is a rectangular horizontal tread extending in the front-rear direction, and horizontal pieces 4 </ b> A, 5 </ b> A that extend inward in the left-right direction on the lower surfaces of the left and right ends of the expanded metal 3. A pair of left and right angle members 4, 5 and a pair of left and right angle members 4, 5 are connected to each other between the lower surfaces so that the vertical pieces 4 B, 5 B extend upward, and the pair of left and right angle members 4, 5 are joined together. The front and rear scaffolding members 2 and 2 which are welded and installed between the lower surfaces of the front and rear reinforcing beams 6A,... It consists of angle material 6B, 6B which is a connection member for this.
Here, as the step board, an expanded metal obtained by machining a plate material into a mesh (diamond) shape is used, and therefore, there is little obstruction of illumination, field of view, and the like. Depending on the structure of the tread board, the reinforcing beams 6A may be eliminated.

As shown in FIGS. 1 and 2, the left handrail member 7 is an upper and lower upper horizontal casing 7 </ b> A that is a headboard, a lower horizontal casing 7 </ b> B that is a handrail receiver, and a handrail that connects them. The right handrail member 8 is composed of an upper horizontal housing 8A, which is a top and bottom, a lower horizontal housing 8B, which is a handrail receiver, and a handrail which connects them. It consists of a certain connecting housing 8C extending in the vertical direction.
The connecting casings 7C and 8C do not necessarily extend in the vertical direction, but the connecting casings 7C and 8C at both ends in the front-rear direction (in particular, the end connecting casings 7D and 7D) extend. Is the vertical direction.
As shown in FIGS. 1, 2, and 5, the lower horizontal housing 7 </ b> B of the handrail member 7 is connected to the lower side by front and rear connecting bodies 9 and 9 before and after being integrated with the handrail member 7. Three horizontal shafts 11,... Extending in the direction, for example, are attached, and the lower horizontal housing 8B of the handrail member 8 is connected to the lower side of the handrail member 8 by the front and rear connecting bodies 10 and 10 and integrated with the handrail member 8. For example, three horizontal shaft bodies 12,... Extending in the front-rear direction are attached.

Next, the connection between the scaffold member 2 and the left and right handrail members 7 and 8 will be described.
As shown in FIGS. 1, 4, and 5, the horizontal shaft bodies 11,... In a state where the lower horizontal shaft bodies 12, ... are positioned, the horizontal shaft bodies 11, ..., 12, ... are circumscribed so that the horizontal shaft bodies 11, ..., 12, ... become the rotation axis C. The upper and lower leg screw portions 13A, 13A of the U-bolts 13,... Having the bent portions are inserted into through holes (not shown) formed in the vertical pieces 4B, 5B, and the nuts 13B, 13B are formed from the outside in the left-right direction of the vertical pieces 4B, 5B. The left and right handrail members 7 and 8 can be easily attached to the scaffold member 2 by screwing together.

Next, a configuration example of the fixing means 14 for fixing the left and right handrail members 7 and 8 in the standing state to the left and right suspension members 21, 22,.
While the scaffolding member 2 of the scaffolding 1 with the handrail in a state where the left and right handrail members 7 and 8 are folded inward in the left-right direction as indicated by a two-dot chain line in FIG. 4, avoiding interference with devices or facilities existing on the factory floor. The whole scaffold 1 with a handrail is lifted by a chain block or the like, and as shown in FIG. 1, the work of fixing to the left and right suspension members 21, 22,... With bolts and nuts 23A, 23B,. In the state performed for 1,..., The scaffold members 2,... Are continuous in the front-rear direction, and the scaffold for the worker is completed, so that the worker rides on the scaffold member 2 as shown in FIG. In this state, the operator raises the left and right handrail members 7 and 8 above the rotation axes C and C.

1, 2, 4, and 6, the left and right handrail members 7, 7 extend in the vertical direction between the upper end portions of the end connection housings 7 </ b> D, 7 </ b> D and the suspension member 21. The receiving plate 15 is applied, the holding plate 16 is applied from the inner side (right side) in the left-right direction to the end connecting housings 7D and 7D, and the bolts 17A are inserted into the through holes 16A and the collar 18 of the holding plate 16 and the through holes 15A of the receiving plate 15 and the suspension plate. By inserting the nut 17 </ b> B from the outside (left side) in the left-right direction of the suspension member 21 through the through hole 21 </ b> A of the suspension member 21, the left and right handrail members 7, 7 and the left suspension member 21 are connected. It is firmly fixed.
Similarly, the right and left handrail members 8 and 8 are firmly fixed to the right end suspension housings 8D and 8D and the right suspension member 22 by the fixing means 14 having such a simple configuration.

According to the scaffold 1 with a handrail having the above-described configuration, the left and right handrail members 7 and 8 are rotated about the rotation axes C and C in the front-rear direction with respect to the scaffold member 2 and are folded substantially horizontally. By doing so, the entire scaffold 1 with a handrail can be lifted by a chain block or the like and attached to the suspension members 21, 22,. If the worker who has been on the scaffolding member 2 after the mounting operation raises the left and right handrail members 7 and 8, the handrail is immediately formed, and in this state the handrail is formed, the operator can fix the fixing means 14, The operation of fixing the left and right handrail members 7 and 8 to the suspension members 21 and 22 can be performed.
Therefore, since there is no work at a high place for attaching the left and right handrail members 7 and 8 to the scaffold member 2 performed by an operator who rides on the scaffold member 2 without the left and right handrail members 7 and 8 standing up, It is possible to reduce the risk that the worker who performs the work will fall.
Further, in the scaffold 1 with a handrail alone, the left and right handrail members 7, 8 can be rotated about the rotation axes C, C in the front-rear direction with respect to the scaffold member 2 and can be folded substantially horizontally. In this folded state, since it is not bulky, the space efficiency during transportation or storage is increased.

Further, since the handrail members 7, 8 are firmly fixed to the suspension members 21, 22,... By the fixing means 14,. Since it is difficult to fall outside and sufficient fall strength and rigidity can be easily secured, safety when performing maintenance work or the like at a high place can be improved.
Furthermore, the fixing means 14,... Has a simple configuration, and the structure that allows the handrail members 7, 8 to be folded is a combination of the angle members 4, 5 and the U bolts 13,. Since the left and right handrail members 7 and 8 are rotated about the pivot 12, the handrail has high strength in the installed state and can fold the left and right handrail members 7 and 8 with respect to the scaffold member 2. While realizing the structure of the attached scaffold 1, the cost does not increase.

  In addition, in the state where the scaffold 1 with the handrail is installed between the suspension members 21, 22,... And the installation is completed, the left and right handrail members 7, 8 and the vertical pieces 4B, 5B of the left and right angle members 4, 5 The integrated left and right connecting bodies 9 and 10 are in contact with the inner sides of the vertical pieces 4B and 5B in the left-right direction (see FIG. 5), and one of the connecting bodies 9 or 10 around the rotation axis C is the vertical piece 4B. Alternatively, if the other connecting body 10 or 9 is pressed against the vertical piece 5B or 4B when turning in a direction away from 5B, the swinging of the scaffold member 2 in the left-right direction is suppressed. The stability of the scaffolding when the worker who rides on the scaffolding 1 with the handrail supported by 21, 22,...

  In the above, the left and right pivot shafts C, C supported by the U-bolts 13,... Are provided on the lower horizontal housings 7B, 8B of the left and right handrail members 7, 8, respectively. The left and right handrail members have been described so that the lower horizontal casings 7B and 8B themselves of the left and right handrail members 7 and 8 become the left and right rotation axes C and C supported by the U bolts 13 and so on. 7, 8 may be formed.

It is a perspective view which shows the state which constructed the scaffold with a handrail which concerns on embodiment of this invention between the hanging members of front and rear, right and left. It is also a front view. It is also a plan view. It is the longitudinal cross-sectional view similarly seen from back. It is the longitudinal cross-sectional view seen from the back which similarly shows an enlarged principal part. It is arrow XX sectional drawing of FIG.

Explanation of symbols

C Rotating shaft 1 Scaffold with handrail 2 Scaffolding member 3 Expanded metal (tread)
4,5 Angle material 4A, 5A Horizontal piece 4B, 5B Vertical piece 6A Reinforcement beam 6B Angle material (connection member)
7,8 Handrail member 7A, 8A Upper horizontal frame (Kasagi)
7B, 8B Lower horizontal frame (handrail holder)
7C, 8C connecting housing (handrail)
7D, 8D End connecting housing 9, 10 Connecting body 11, 12 Horizontal shaft body 13 U bolt 13A Threaded portion 13B Nut 14 Fixing means 15 Receiving plate 16 Presser plate 17A Bolt 17B Nut 18 Collar 19, 20 Connecting pieces 21, 22 Hanging Lowering member 23A Bolt 23B Nut

Claims (1)

A scaffold with handrails erected between the front, rear, left and right suspension members,
A rectangular horizontal tread extending in the front-rear direction, and a pair of angle members extending in the front-rear direction, attached to the left and right ends of the horizontal tread so that a horizontal piece extending inward in the left-right direction is attached and the vertical piece extends upward. A scaffolding member comprising:
A pair of left and right handrail members comprising at least two upper and lower horizontal casings extending in the front-rear direction and a connecting casing connecting the upper and lower horizontal casings;
A lower horizontal housing of the handrail member, or a horizontal shaft body extending in the front-rear direction and connected to the lower horizontal housing and a connecting body so as to be integrated with the handrail member, A U-bolt that attaches the lower horizontal casing or the horizontal shaft body to the vertical piece so that the lower horizontal casing or the horizontal shaft body serves as a rotation axis in a state where the vertical piece of the material is positioned in the left-right direction inside;
Fixing means for fixing the handrail member in an upright state on the rotating shaft to the suspension member;
A scaffold with a handrail, characterized by comprising

Images