JPH0111871Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a retractable scaffold board used for construction, interior decoration work, etc.

2. Description of the Related Art Conventionally, there have been scaffolding boards that can be expanded and contracted to suit the size of the space at a construction site, and are usually equipped with a fixing device that fixes the scaffolding boards at a desired length. As an example of this kind of fixing device, for example, a fixing pin is provided on one sliding member of a scaffolding board so as to be movable laterally, and a plurality of engagement holes are formed spaced apart in the longitudinal direction of the other sliding member. It was configured to be selectively and removably engaged with. However, it can only be fixed at a position where the engagement hole is formed, and it is necessary to align the fixing pin with the engagement hole, which is troublesome. Furthermore, a plurality of engagement holes had to be machined, and there was a large risk that the appearance would be damaged by the engagement holes. Furthermore, since one end of the fixing pin protrudes outward, there is a high risk of damage due to collision with other members during transportation or storage.

Therefore, in view of the above problems, the present invention aims to provide a structure that can be expanded and fixed in a stepless manner and is easy to use.
Its characteristic feature is that it consists of a pair of sliding members each having a plurality of rods placed in parallel at a distance from each other, and between the rods of one sliding member, the rods of the other sliding member are placed in parallel. In a retractable scaffolding board in which both sliding members are connected to each other so as to be slidable in the longitudinal direction in a loosely inserted manner, and are provided with a fixing device for fixing the retractable and retractable members, the fixing device is attached to an outer end of the retractable scaffolding board. A housing provided within a connecting end of a cylindrical rod; an operating body that is movable in the axial direction of the rod, protrudes axially from the connecting end and is supported by the housing; The cam part is provided with an engaging part that engages with a cam part provided on the operating body, and a pressing body supported by a housing so as to be movable in the direction of adjacent rod members. Due to the relative sliding between the cylindrical rod and the engaging portion, the pressing body protrudes from the opening formed inside the cylindrical rod and is pressed against the side surface of the adjacent rod so as to be able to approach and separate.

Hereinafter, embodiments of the present invention will be described based on the drawings. In FIGS. 1 to 7, reference numeral 1 denotes a telescopic scaffolding board, which is composed of a pair of sliding members 2 and 3, each of which is , a plurality of rectangular cylindrical rod members 4 and 5 are arranged in parallel and spaced apart from each other, and each rod member 4,
Reinforcement frames 6, 7, 8, and 9 are fixedly provided at both ends of each of the five groups with screws or the like to maintain a constant spacing between the rod members 4 and 5, respectively. The rod members 5 of the other sliding member 3 are loosely inserted between the rod members 4 of one sliding member 2, and both sliding members 2 and 3 slide against each other in the longitudinal direction of the rod members 4 and 5. are freely connected,
The entire length of the scaffolding board 1 can be adjusted freely.

The reinforcing frames 7 and 9 provided at the connecting ends of the rods 4 and 5 are respectively annular, and the reinforcing frames 6 and 8 provided at both ends of the scaffolding board 1 are 2
As shown in the figure, it has a U-shape when viewed from the side, and grips 10 and 11 are provided on the upper surfaces of the reinforcing frames 6 and 8, respectively.
is provided.

Reference numeral 12 denotes an extension stopper, which is fixed to one of the rod members 5 with screws or the like, and a reinforcing frame 7 fixed to the other rod member 4.
The scaffolding board 1 is brought into contact with the scaffolding board 1 so as to be able to move toward and away from the scaffolding board 1, thereby restricting overextension of the scaffolding board 1 and ensuring an overlapping margin. Further, reference numeral 13 denotes a shortening stopper, which is fixed to one of the rods 5 with screws or the like, and comes into contact with the reinforcing frame 7 fixed to the other rod 4 so as to be able to move toward and away from it, thereby regulating the shortening operation of the scaffolding board 1. There is.

Fixing devices 14 and 1 are provided at the connection side ends of each of the rods 4 and 5 located on the outer end side of the scaffold board 1, respectively, for fixing and releasably fixing both sliding members 2 and 3 at a desired length.
As shown in FIGS. 4 to 7, the fixing device 14 has bolts 15 and nuts 1 stored in the end of the rod 4 on the outer inner wall surface of the end.
6 etc., and an operating body 18 and a pressing body 19 supported by the housing 17.
It is equipped with The housing 17 includes a mounting board 20 made of a rectangular metal plate;
The metal guide plate 22 is formed into a polymeric shape and has a cylindrical operation body guide hole 21 formed in the axial direction of the rod material 4 in the center thereof. The operating body 18
is formed by bending a band-shaped metal plate into a substantially U-shape, and both ends thereof are inserted into the operating body guide hole 21 so as to be relatively slidable, and here, the operating body 18 is inserted into the operating unit 23.
protrudes in the axial direction from the end of the rod material 14, and the rod material 1
4 is supported by the housing 17 so as to be movable forward and backward in the axial direction. The pressing body 19 has a cylindrical pressing shaft portion 24.
and a press plate part 25 provided at one end of the press shaft part 24, and a friction braking member 26 made of urethane rubber or the like is fitted onto the press plate part 25. The pressing shaft portion 24 of the pressing body 19 is inserted into the pressing body guide hole 27 formed in the side surface of the operating body guide hole 21 on the side of the adjacent rod 5, and the pressing shaft portion 24 of the pressing body 19 is movably inserted. It is supported by a guide piece 28 bent on the base plate 20, and the pressing body 19 is supported by the housing 17 so as to be freely movable in the direction of the adjacent rod members 5. Further, as shown in FIGS. 5 and 6, on the housing 17 side of the operation body 18, inclined cam grooves 29 as cam portions are formed facing each other, and on the other hand, a pressing shaft of the pressing body 19 is formed. A spring pin 30 serving as an engaging portion is inserted and fixed in the portion 24 across the cam grooves 29 on both sides. Furthermore, guide grooves 31 for slidingly guiding the spring pins 30 are formed on the opposite side surfaces of the operating body guide holes 21 of the housing 17, respectively. Then, by operating the rod member 4 of the operating body 18 in the axial direction, the cam groove 29
and the spring pin 30 are slid relative to each other, and through this relative sliding, the pressing body 19 can freely move forward and backward in the direction of the adjacent rod members 5, and by this movement, the opening formed in the inner wall surface of the rod member 4 is moved. The pressing plate portion 25 and the friction braking member 26 of the pressing body 19 protrude from the portion 32 and are pressed against the side surface of the adjacent rod material 5 so as to be able to come into contact with and separate from the side surface of the rod material 5. is prevented.

The embodiment of the present invention is constructed as described above, and when it is used, both the sliding members 2 and 3 are slid relative to each other, and after the scaffolding board 1 is adjusted to extend or contract to a desired length, as shown in FIG. When the operating body 18 is pressed in the direction of arrow A, the pressing body 19 is projected in the direction of the adjacent rod members 5 due to the relative sliding between the cam groove 29 and the spring pin 30, as shown in FIG. , the friction braking member 26 is projected from the opening 32 of the rod 4 and is pressed against the side surface of the adjacent rod 5, and the frictional force between the friction braking member 26 and the side surface of the rod 5 causes both sliding members 2 ,3
relative sliding is prevented, and the length of the scaffolding board 1 is now fixed at the desired length. Next, to release the fixed state, pull out the operating body 18 in the direction of arrow B in FIG. 6, and the cam groove 29 and spring pin 3
Due to the relative sliding with respect to 0, as shown in Fig. 5,
Return to the initial release state. As described above, the fixation can be freely released by operating the operating body 18 in the axial direction, and since the pressing body 19 is pressed against the side surface of the rod material 5, the work of aligning the engagement holes as in the conventional method is not required. is not necessary, and the expansion and contraction can be adjusted steplessly.
The desired length can be easily obtained, and it is easy to operate and use. Further, there is no need for hole machining, thereby reducing manufacturing costs.Furthermore, there is no engagement hole, etc., and the appearance can be improved. Further, since the fixing device 14 is configured not to protrude from the side, collision with other members can be prevented, damage such as breakage can be prevented, and durability can be improved. Moreover, they have the advantage of being able to be used side by side. Furthermore, since the extension stopper 12 ensures an overlapping margin, safety can be improved, and the shortening stopper 13 also prevents the risk of hands or the like being caught, resulting in safety. Furthermore, it has a simple configuration and can be easily produced.

FIG. 8 and FIG. 9 show other embodiments,
The pressing shaft portion 24 of the pressing body 19 is formed into a prismatic shape,
Engagement grooves 33 as engagement portions are formed on both sides,
On the other hand, on the operating body 18, a protrusion 34 serving as a cam portion is inserted into the engagement groove 33 so as to be relatively slidable, and is formed by press working or the like.

As described above, the present invention allows the extensible scaffolding board to be expanded and fixed by pressing the side surfaces of adjacent rod members with the pressing body so as to be able to move toward and away from each other by operating the operating body in the axial direction. It can be expanded and contracted in stages, the desired length can be easily obtained, and it is easy to operate and use. Furthermore, it has the advantage of reducing manufacturing costs and improving appearance.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the embodiment of the present invention in an extended state, FIG. 2 is a view taken from the line shown in FIG. 1, FIG. 3 is a plan view showing the contracted state, and FIG. FIG. 5 is an enlarged view of FIG. 2 - an enlarged view of the line, FIG. 6 is a plan view showing the fixed state, FIG. 7 is a sectional view of FIG. FIG. 9 is a plane cross-sectional view of main parts showing an embodiment of the present invention, and FIG. 9 is a view taken along the line shown in FIG. 1... Telescopic scaffolding board, 2, 3... Sliding member, 4,
5... Rod material, 14... Fixing device, 17... Housing, 18... Operating body, 19... Pressing body, 29...
...Cam groove, 30...Spring pin.

Claims (1)

[Scope of utility model registration request] It consists of a pair of sliding members having a plurality of rods arranged in parallel and spaced apart from each other, and the rods of the other sliding member are loosely inserted between the rods of one sliding member, so that both sliding members In an extensible scaffold board, the movable members are connected to each other so as to be slidable in the longitudinal direction, and are provided with a fixing device for fixing the movable members so as to be extendable and retractable. a housing provided within the connecting end of the rod, an operating body that is movable in the axial direction of the rod material and that projects axially from the connecting end and is supported by the housing, and a cam provided on the operating body. The cam part and the engaging part can be moved relative to each other by axial operation of the operating body. By sliding,
A telescopic scaffolding board characterized in that a pressing body protrudes from an opening formed inside a cylindrical rod and is pressed against the side surface of an adjacent rod so as to be able to come into contact with and separate from the side of the rod.