JP4588064B2 - Mobile handrail frame of framework scaffold - Google Patents

Description

  The present invention relates to a movable handrail frame for a frame scaffold, and has been developed as a prior-art handrail frame that can move up and down the frame scaffold prior to assembly and disassembly of the frame scaffold.

  Conventionally, in the construction of a new building, demolition or renovation of a building, for example, a frame scaffold as shown in FIG. 12 (i) has been widely used for high-altitude work. In this type of frame scaffold, a main part of the work scaffold is composed of a plurality of building frames 20 serving as a shaft group, a plurality of fabric frames 21 serving as a work floor, and braces 22 serving as reinforcing members.

  The building frame 20 is a unit material formed in a gate shape (torii shape) from two building sites 20a and 20a and a horizontal land 20b installed between the upper ends of the building sites 20a and 20a. It is built on the outer periphery of the building A at predetermined intervals, and is assembled in a plurality of stages by inserting up and down. Moreover, the fabric frame 21 is spanned between the horizontal places 20b and 20b of the building frame 20 of each step | level.

  By the way, when assembling the frame scaffolding, the building frame 20 and the cloth frame 21 are assembled one by one in order, and when disassembling, the building frame 20 and the cloth frame 21 are disassembled and removed in order from one step to the next. As shown in FIG. 12 (ii), since all work is performed by the worker's hand at the highest height, it is necessary to ensure the safety of the worker from a fall accident during the work. There are safety measures such as installing a handrail frame.

WO 97/10399 pamphlet JP 2000-17829 A JP 2001-81958 A

  In this case, the handrail frame is individually attached to each step and each span from the bottom to the top of the frame scaffolding, so the handrail frame alone is enormous and the attachment and removal is very troublesome. In addition, the management of the scaffolding material including the handrail frame becomes complicated, and there are further problems such as dropping the handrail frame during the operation of attaching and removing the handrail frame.

  In addition, a type of handrail has been developed in which the handrail frame can be moved in the vertical direction of the frame scaffold so that the handrail frame can be moved up and down and replaced. Is directly attached to the frame of the frame scaffolding and also serves as a guide rail when the building moves the handrail frame up and down.

  However, the assembly of this type of framework scaffold is generally limited in its assembly accuracy even if it is performed by skilled workers. As a result, the guide rails mounted on the building frame of such a poorly assembled assembly frame naturally have a reduced spacing and parallelism between the guide rails, so that the handrail frame cannot be moved up and down smoothly. there were.

  Furthermore, since the guide rail is formed integrally with the building frame, there is a problem that it cannot be used at all for the frame scaffolding made of the existing building frame without the guide rail.

  The present invention has been made to solve the above-described problems, and provides a movable handrail frame of a frame scaffold that allows the handrail frame to freely move up and down prior to assembly and disassembly of the frame scaffold. Objective.

The movable handrail frame of the frame scaffold according to claim 1 moves up and down to a frame scaffold constructed by installing a plurality of building frames at predetermined intervals and in a plurality of stages prior to assembly and disassembly of the frame scaffold. In the movable handrail frame of the frame scaffolding installed in such a manner, it is movable vertically between a plurality of guide rails installed vertically along the building frame and adjacent guide rails. An operating handle for operating the fixed stopper, and a fixed stopper that can be engaged with and disengaged from an engaging portion provided on the guide rail. Two handles are an upper operation handle provided at a position higher than the floor surface of the frame scaffold and a lower operation handle provided below the upper operation handle. Mounted on the fixed stopper via a link mechanism, the upper operating handle is characterized in that become attached to the link mechanism through a vertical rod.

The movable handrail frame of the frame scaffold according to claim 2 is the mobile handrail frame of the frame scaffold according to claim 1 , wherein the handrail frame main body is provided with a fall prevention stopper for preventing the handrail frame main body from dropping. It is characterized by.

  As a structure of the fall prevention stopper in this case, for example, the fall prevention stopper is rotatably or slidably attached to both sides of the handrail frame main body, and is moved toward the guide rail side by the elastic force of a spring member such as a leaf spring or a coil spring. A structure in which a notch portion or a stopper insertion hole is provided on the side portion of the guide rail as a locking portion that can be engaged and disengaged is provided on the side portion of the guide rail while the fall prevention stopper protrudes toward the guide rail side. .

The movable handrail frame of the frame scaffold according to claim 3 is the mobile handrail frame of the frame scaffold according to claim 1 or 2, wherein a lower frame is provided that extends horizontally between guide rails adjacent to the handrail frame body. In the lower frame, a fixed stopper that can be engaged and disengaged with a stopper insertion hole provided as an engaging portion on the guide rail by sliding in the longitudinal direction is provided. is there.

The movable handrail frame of the frame scaffold according to claim 4 is the movable handrail frame of the frame scaffold according to any one of claims 1 to 3 , wherein the handrail frame body is provided at an arbitrary position in the vertical direction. The upper part or the lower part is configured to be swingable in the out-of-plane direction of the handrail frame body with the hinge part as an axis .

  As a method of such a configuration, for example, by providing a hinge mechanism using a bolt or a pin or the like at an arbitrary position in the vertical direction of the handrail frame main body, for example, at a substantially central portion, the hinge portion is used as a shaft. It is possible to have a structure in which the portion or the lower portion swings (tilts).

  With such a configuration, the handrail frame body can be moved vertically along the inclination of the guide rail, even in the case of a guide rail with low verticality and parallelism attached to a building frame with poor assembly accuracy. It can slide very smoothly.

The movable handrail frame of the frame scaffold according to claim 5 is the movable handrail frame of the frame scaffold according to any one of claims 1 to 4 , and is slidable in the longitudinal direction of the guide rail at both ends of the handrail frame main body. A guide member that engages with the guide member is provided.

The movable handrail frame of the frame scaffold according to claim 6 is the movable handrail frame of the frame scaffold according to claim 5, wherein the guide member includes a movable portion, and the movable portion moves the movable portion into the handrail column of the handrail frame main body. and it is characterized in that it slidably mounted in the axial direction of rotation and the connecting bolt in the circumferential direction of the connecting bolt to be connected to.

  By configuring the guide member in this way, when the handrail frame body is slid vertically along the guide rail, the handrail frame body can be moved up and down very smoothly without receiving frictional resistance with the guide rail. Can do.

Mobile handrail frame framework scaffold of claim 7 wherein, in the mobile handrail frame framework scaffold according to any one of claims 1 to 6 the guide rail is configured by being divided into a plurality, and connected respectively, and It is configured to be separable.

  The present invention is as described above. In particular, the handrail frame main body freely slides in the vertical direction between the guide rails installed along the building frame, and the handrail frame main body is provided on the guide rail. Since the stopper that engages with and disengages from the engaging portion is provided, the frame scaffolding is provided by moving the handrail frame body up and down prior to assembly and removal of the building frame when assembling and disassembling the frame scaffolding. During the assembly and disassembly work, the safety of the worker can always be ensured by the handrail composed of the guide rail and the handrail frame main body.

  Moreover, since the guide rail and the guide member which engages slidably in the longitudinal direction are provided at both ends of the handrail frame body, the handrail frame body can be moved up and down very smoothly.

  In addition, the guide rail is divided into a plurality of parts, and each is formed so that it can be connected and disconnected, so by extending the length by adding the guide rail, it is also free for multiple frame scaffolds Furthermore, since the handrail frame main body can be moved up and down freely, it is only necessary to install one handrail frame main body, which greatly reduces the number of handrail frame main bodies and facilitates management, and is extremely economical. is there.

  In addition, since the fall prevention stopper is attached, there is an effect that it is possible to prevent an accident such as accidentally dropping the handrail frame during assembly and disassembly work of the frame scaffold.

  In addition, the handrail frame main body is attached between the guide rails attached to the building site separately from the building frame, so if the guide rail can be attached, it can be used as a handrail frame for an existing frame scaffold. Since it can be used, the range of use is extremely wide and the practicality can be greatly expected.

  1 to 11 show an example of a movable handrail frame of a frame scaffold according to the present invention. In the drawings, a plurality of building frames 1 are assembled in a plurality of spans and a plurality of stages on the outer periphery of a building A as a frame scaffold. It has been.

Further, the guide rail 2 in Kenchi 1a of rear depressing side (roadside) of Kakukenwaku 1 attached denominated respectively vertically along the Kenchi 1a, also the handrail frame main body 3 between the guide rails 2 and 2 Are attached to each. Here, the opposite side to the front side on the building A side is referred to as the rear side (road side).

Guide rail 2 is formed in a hollow rectangular cross-sectional shape, and both sides (framework scaffold span direction on both sides) in the guide pieces 2a, 2a and the stopper insertion hole 2c is formed respectively, also substantially in the middle portion of the guide rail 2 Mounting holes 2b and 2d penetrating in the width direction of the building frame 1 (longitudinal direction of the horizontal ground 1b) are formed in the lower end portion. In this case, the mounting hole 2d is a hole for mounting a fixing bracket (clamp) 5 described later, and the mounting hole 2b is a hole for mounting a fixing bracket 4 described later.

  The guide pieces 2 a and 2 a are formed continuously in the vertical direction of the guide rail 2, and the stopper insertion hole 2 c is formed in an almost middle portion of the guide rail 2. Further, a tenon (joint) 2e is projected from the upper end portion of the guide rail 2.

  A plurality of guide rails 2 formed in this way are erected from the bottom to the top of the frame scaffolding on the outside of the building 1a of each building frame 1, and the tenon 2e of the lower guide rail 2 is connected to the upper guide. The upper and lower guide rails 2 are connected to each other by being inserted into the hollow portion at the lower end of the rail 2, and with this configuration, a single continuous piece from the plurality of guide rails 2 to the uppermost stage of the frame scaffolding. Guide rails are formed.

  Further, an intermediate portion of each guide rail 2 is fixed to the upper end portion of the building site 1 a by a fixing bracket 4, and a lower end portion is fixed to an intermediate portion of the building site 1 a by a fixing bracket 5.

  The fixing bracket 4 has a ring shape, and the fixing portion 4a through which the upper end portion of the building 1a (the portion above the connecting portion with the horizontal land 1b) passes, and is horizontally oriented from one end of the fixing portion 4a to the guide rail 2 side. And a male nut 4b penetrating through the mounting hole 2b of the guide rail 2, and a fixing nut 6 is fastened to the tip of the male screw 4b, so that the intermediate portion of each guide rail 2 is built. It is fixed to the upper end of 1a.

  In addition, the fixing bracket 4 in this case is being fixed to the upper end part of the building land 1a, without falling because the ring-shaped fixing | fixed part 4a is latched by the horizontal land 1b.

  FIG. 4 (iii) shows a modified example of the fixing bracket, and in particular, the fixing portion 4a is formed in a U-shape opening to the side. Since the fixing portion 4a is formed in this manner, the fixing bracket 4 can be attached and detached even when the upper and lower building sites 1a are still connected.

  The fixing bracket 5 is a clamp, and is attached to the lower end portion of the building 1a. The fixing bracket 5 that passes through the mounting hole 2d of the guide rail 2 is fastened to the fixing bracket 5 so that the lower end of each guide rail 2 is fixed. The part is fixed to the middle part of the building 1a.

  The handrail frame body 3 includes a lower frame 3a that extends horizontally between the adjacent guide rails 2 and 2, and handrail pillars 3b that are provided upright at both ends of the lower frame 3a in the vicinity of the guide rail 2, respectively. It is formed in a rectangular frame shape from 3b and the handrail rod 3c spanned between the upper ends of the handrail pillars 3b and 3b.

  The lower frame 3a, the handrail column 3b, and the handrail rod 3c are all formed in a hollow cross-sectional shape, and in particular, the guide members 8 projecting horizontally toward the guide rail 2 at both ends of the lower frame 3a and the upper end of the handrail column 3b. Each guide member 8 is formed with a guide groove 8a that engages with the guide pieces 2a, 2a of the guide rail 2.

  Further, on both sides from the middle portion of the lower frame 3 a, rod-like fixed stoppers 9 that are continuous from the middle portion to the guide members 8 at both ends are respectively inserted slidably in the longitudinal direction of the lower frame 3.

  The fixed stopper 9 is in the lower frame 3a and slides to the guide rail 2 side, and at the same time, the front end portion 9a protrudes into the guide groove 8a and is inserted into the stopper insertion hole 2c of the guide rail 2 and vice versa. By sliding to the side, the tip end portion 9a is detached from the stopper insertion hole 2c.

  Further, as shown in FIGS. 7 (i) and (ii), the fixed stopper 9 is configured to be operated by an operation handle provided with a link mechanism 10.

  The link mechanism 10 is formed in an approximately L shape, and one end side thereof is connected to the end portion of the fixed stopper 9, and the fixed stopper 9 is slid horizontally on the handrail frame body 3 so as to rotate freely at the same time. The two rotating bodies 10a, the two vertical rods 10b and 10b connected to the other end of the rotating body 10a and attached so as to freely move up and down with the rotation of the rotating body 10a, and the vertical Operation rods 10c and 10d are provided between the upper end portions and the lower end portions of the rods 10b and 10b, respectively.

  Then, when the operation handle 10c or the operation handle 10d is held up and down, the two vertical rods 10b and 10b move up and down, and the rotating bodies 10a and 10a rotate accordingly, thereby the fixed stoppers 9 on both sides. 9 slides horizontally so that the tip 9a protrudes into the guide groove 8a and is inserted into the stopper insertion hole 2c of the guide rail 2, and the tip 9a is inserted into the stopper by sliding to the opposite side. It comes off from the hole 2c.

  With this configuration, when raising the handrail frame body 3, the operation handle 10c or 10d is slightly lifted up, and when raising the handrail frame body 3, the operation handle 10c or 10d is slightly lifted up. By lifting, the fixed stopper 9 and the stopper insertion hole 2c can be engaged and disengaged with one touch, and the movable handrail frame can be moved (changed) very smoothly.

  Further, FIG. 8 shows that the fall prevention stoppers 11 and 11 are attached to both sides of the handrail frame body 3 to prevent the handrail frame body 3 from being accidentally dropped when the fixed stopper 9 is released. It is intended to make the work safe when raising and lowering.

  The fall prevention stopper 11 in this case is rotatably attached to the lower end portions of the handrail pillars 3b and 3b of the handrail frame body 3, and the lower end portion 11a is rotated to the guide rail 2 side by the U-shaped leaf spring 12. So that it is always energized.

  Further, a notch portion 2f is formed on the side portion of the guide rail 2 so that the lower end portion 11a of the fall prevention stopper 11 can be engaged therewith. And when the handrail frame main body 3 falls accidentally, the lower end part 11a of the fall prevention stopper 11 engages with the notch part 2f of the left-right guide rail 2, and stops dropping of the handrail frame main body 3 on the way. Can do.

  9 to 11, a hinge mechanism 13 is further provided at a substantially intermediate portion of the handrail frame body 3, and the handrail frame body 3 is swung within a range of a certain angle around the hinge portion (portion having the hinge mechanism 13). (Tilt) By freely forming and attaching the guide members 8 and 8 so as to be rotatable and extendable, even if the guide rails 2 and 2 are slightly tilted, the handrail frame can be easily absorbed. The main body 3 can be smoothly slid up and down.

  In this case, the hinge mechanism 13 is provided at a substantially middle portion between the handrail pillars 3b and 3b on both ends of the handrail frame body 3 and the handrail pillars 3d and 3d erected therebetween. The shaft is formed so as to freely swing (tilt) in a range of a certain angle in the out-of-plane direction of the handrail frame body 3.

  The hinge mechanism 13 is formed by forming the handrail pillars 3b and 3d from two members, an upper part and a lower part from the hinge part, respectively, and these two members are rotatably connected by a connecting bolt 13a. Is a hinge.

  The guide member 8 is formed of a movable portion 8b having a guide groove 8a, a fixed portion 8c fixed to the handrail column 3b, and a connecting bolt 8d connecting the movable portion 8b to the fixed portion 8c. The movable portion 8b is a connecting bolt. It rotates freely in the circumferential direction of 8d and moves freely in the axial direction of the connecting bolt 8d.

  Since the guide member 8 is configured in this way, when the handrail frame body 3 is slid in the vertical direction along the guide rail 2, the handrail frame body 3 can be made extremely free from frictional resistance with the guide rail 2. It can be moved up and down smoothly.

  Next, a method of handling the guide rail 2 and the handrail frame body 3 when assembling the frame scaffold will be described.

(1) At the uppermost stage of the frame scaffold under assembly, the guide rails 2 are respectively constructed on the outside of each building 1a on the rear side (road side) of the building frame 1 built on the floor surface. In this case, the guide rail 2 is installed vertically by extending the upper part above the intermediate part above the building 1a. And it connects with the lower guide rail 2 by inserting in the lower end part the tenon 2e protrudingly provided by the upper end part of the lower guide rail 2 already attached. Moreover, an intermediate part is fixed to the upper end part of the building 1a with the fixing metal 4, and a lower end is fixed to the intermediate part of the building 1a with the fixing metal 5.

(2) Next, with the fixed stopper 9 of the handrail frame main body 3 released from the uppermost work scaffold or the lowermost work scaffold, the handrail frame main body 3 is attached to the guide rail 2, and then the handrail frame main body 3 Set the upper guide rail 2.

(3) Next, the handrail frame body 3 is slid and moved between the guide rails 2 and 2 which are extended and built above the uppermost building frame 1. Then, the handrail frame body 3 is fixed again between the guide rails 2 and 2. In this case, the handrail frame body 3 is fixed between the guide rails 2 and 2 by sliding the fixed stopper 9 toward the guide rail 2 and inserting the tip end portion 9a into the stopper insertion hole 2c.

(4) Then, the upper building frame 1 that has moved the handrail frame body 3 is assembled.

  Similarly, the extension of the guide rail 2 and the movement of the handrail frame main body 3 are performed prior to the assembly of the building frame 1, so that the handrail composed of the guide rails 2, 2 and the handrail frame main body 3 is always operated. The frame scaffolding can be assembled in a state where the safety of personnel is ensured.

  Next, a method for handling the guide rail 2 and the handrail frame body 3 at the time of dismantling the frame scaffold will be described.

(1) At the top of the frame scaffold during dismantling, the handrail frame body 3 is fixed between the guide rails 2 and 2 that are built above the building frame 1 that is built on the floor surface. To release.

(2) Next, the handrail frame body 3 is moved to the next floor on the uppermost stage by sliding between the guide rails 2 and 2. Then, the handrail frame body 3 is fixed again at that position.

(3) Next, the guide rail 2 which is extended and built above the building frame 1 built on the top floor is removed. In this case, after the fixing bracket 5 is removed and the lower end portion of the guide rail 2 is separated from the building site 1a, the fixing portion 4a of the fixing bracket 4 is lifted from the upper end portion of the building site 1a by gently lifting the guide rail 2 upward. Since it comes off, the guide rail 2 can be easily removed.

(4) Next, the uppermost building frame 1 is removed using the handrail composed of the guide rails 2 and 2 and the handrail frame body 3 as a safety fence.

  Similarly, by moving the handrail frame main body 3 and removing the guide rail 2 prior to the removal of the building frame 1, the handrail composed of the guide rails 2 and 2 and the handrail frame main body 3 is always operated. The frame scaffolding can be dismantled and removed while the safety of personnel is ensured.

It is a partial perspective view of a frame scaffold and a movable handrail frame. The guide rail is shown, (i) and (iv) are side views thereof, (ii) is a front view thereof, and (iii) is a transverse sectional view thereof. The mobile handrail frame is shown, (i) is a front view thereof, and (ii) is a side view thereof. (i) is an enlarged view of a portion in FIG. 3 (ii), and (ii) and (iii) are cross-sectional views showing other embodiments of the fixing bracket. (i) is an enlarged cross-sectional view of the two parts in FIG. 3 (i) in a state where the handrail frame body is fixed, and (ii) is an enlarged view of the two parts in FIG. 3 (i) in a state where the handrail frame body is fixed. It is a longitudinal cross-sectional view. (i) is an enlarged cross-sectional view of the portion E in FIG. 3 (i), and (ii) is an enlarged side view thereof. (i) is a front view of the handrail frame body, and (ii) is a partially enlarged front view thereof. (i) is a front view of the handrail frame body, and (ii) and (iii) are partially enlarged front views thereof. It is a front view of the handrail frame main body which provided the rocking | fluctuation part. (i) is a partial side view showing a swinging state of the handrail frame body, and (ii) is a partial front view thereof. An example of a guide member is shown, (i) is a partially broken plan view when assembled or used, (ii) is a partially side view thereof, and (iii) is a partially broken front view thereof. An example of a framework scaffold is shown, (i) is a partial perspective view thereof, and (ii) is a front view thereof.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building frame 1a Building 1b Horizontal 2 Guide rail 2a Guide piece 2b Stopper insertion hole 2c Mounting hole 2d Mounting hole 2e Tenon (joint)
DESCRIPTION OF SYMBOLS 3 Handrail frame main body 3a Lower frame 3b Handrail pillar 3c Handrail rod 4 Fixing bracket 4a Fixing part 4b Male screw part 5 Fixing bracket 6 Fixing nut 7 Mounting bolt 8 Guide member 8a Guide groove 8b Movable part 8c Fixing part 8d Connecting bolt 9 Fixing stopper 9a End of stopper 10 Link mechanism 10a Rotating body 10b Vertical rod 10c Operation handle 10d Operation handle 11 Fall prevention stopper 11a Lower end of fall prevention stopper 12 Leaf spring 13 Hinge mechanism 13a Connection bolt

Claims (7)

  In a movable handrail frame of a frame scaffolding installed on a frame scaffolding constructed by installing a plurality of building frames at predetermined intervals and in a plurality of stages, so as to move up and down prior to assembly and disassembly of the frame scaffolding And a plurality of guide rails installed vertically along the building frame of the building frame, and a handrail frame body installed between the adjacent guide rails so as to be movable in the vertical direction thereof, the handrail frame The main body is provided with an engaging portion provided on the guide rail, and a fixed stopper that can be engaged and disengaged, and an operating handle for operating the fixed stopper, and the operating handle is provided at a position higher than the floor surface of the frame scaffold. An upper operation handle and a lower operation handle provided below the upper operation handle. The lower operation handle is attached to the fixed stopper via a link mechanism. Ri lighted, movable handrail frame framework scaffold characterized by comprising the upper operating handle is attached to the link mechanism through a vertical rod. Mobile handrail frame framework scaffolding according to claim 1, wherein the fall prevention stopper for preventing the handrail frame body falling of the handrail frame body, characterized in that the thus provided. A lower frame is provided between the guide rails adjacent to the handrail frame main body, and is engaged with a stopper insertion hole provided as an engaging portion in the guide rail by sliding in the lower frame in the lower frame. The movable handrail frame of the frame scaffold according to claim 1 or 2, further comprising a fixed stopper that can be joined and disengaged. The handrail frame main body is configured such that a portion above or below a hinge mechanism provided at an arbitrary position in the vertical direction is swingable in an out-of-plane direction of the handrail frame main body with the hinge portion as an axis. The movable handrail frame of the frame scaffold according to any one of claims 1 to 3 . The movable handrail frame of the frame scaffold according to any one of claims 1 to 4 , wherein guide rails and guide members that are slidably engaged in the longitudinal direction thereof are provided at both ends of the handrail frame main body. . The guide member includes a movable portion, and the movable portion is attached so as to rotate in a circumferential direction of a connection bolt that connects the movable portion to a handrail column of a handrail frame body and to be slidable in an axial direction of the connection bolt. The moving handrail frame of the frame scaffold according to claim 5 . Guide rail is configured by being divided into a plurality, and mobile handrail frame framework scaffold according to any one of claims 1 to 6, characterized in that is configured to respectively connect and disconnect.

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