JP2007247264A - Extendable scaffold board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expandable scaffold board which structurally simplifies a locking mechanism, and which reduces the number of components. <P>SOLUTION: In this extendable scaffold board, a pair of scaffold board bodies is connected together in such a manner as to be relatively displaceable in the length direction of the scaffold board, and a locking mechanism R is interposed between two opposed scaffold board members 4 and 6 of both the scaffold board bodies. The locking mechanism R comprises: a pair of movable pieces 31 and 32 in which engaging recesses a are provided with a constant pitch in the length direction of the scaffold board in one 6 of the two scaffold board members 4 and 6, which protrudes/recedes with respect to the side of the engaging recess a in the other scaffold board member 4 and which protrudes/recedes between a locking position to engage an engaging protrusive piece 33 of one movable piece 31 with the engaging recess a, and an unlocking position to disengage the engaging protrusive piece 33 from the engaging recess a; an oscillating and rotating double arm 30 for interlocking, which is protruded from a rotating shaft 35 so as to be interlocked with and connected to both the movable pieces 31 and 32; and a stopper 34 which is interposed between both the movable pieces 31 and 32, and which temporarily holds one movable piece 31 in each of the locking and unlocking positions. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a telescopic scaffold plate used for a scaffold at a construction site or other work place, and in particular, a pair of scaffold plate bodies each composed of a plurality of scaffold plate members can be relatively moved in the length direction of the scaffold plate. It is related with the expansion-contraction type | formula board | plate connected to, Comprising: The expansion-contraction type | mold scaffold board which interposed the lock mechanism which prevents the relative movement of both scaffold board | substrate bodies between the two scaffold board members which both scaffold board | substrate bodies oppose.

As a conventional stretchable scaffolding plate, for example, one described in Patent Document 1 below is known. However, the lock mechanism in the telescopic scaffolding plate has a problem that the structure is complicated, the number of parts is large, the manufacturing cost is high, and there are many failures.
JP 2004-44295 A

  In view of the above-described conventional problems, the present invention provides a telescoping scaffolding plate that has a simple structure of a lock mechanism, a small number of parts, a low manufacturing cost, a few failures, and a long service life. The purpose is to do.

Means for solving the above problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 is a pair of scaffold plate members 4, 5, 6, 7, and 8, respectively. The scaffold plate bodies 2 and 3 are connected to each other so as to be relatively movable in the length direction of the scaffold plate, and the two scaffold plate bodies 2 and 3 are relatively positioned between the two scaffold plate members 4 and 6 facing each other. In a telescopic scaffolding plate that is interposed via a lock mechanism R that prevents movement,
The locking mechanism R is provided with recesses for engagement at a fixed pitch in the length direction of the scaffolding plate in one of the two scaffolding plate members 4 and 6 (scaffolding plate member 6) facing each other of the two scaffolding plate bodies 2 and 3. The scaffold plate member 4 is a pair of adjacent movable pieces 31 and 32 that move forward and backward with respect to the engagement concave portion side, and only one movable piece 31 has an engagement protrusion 33 at the tip thereof, A pair of movable pieces 31, 32 that move forward and backward between a lock position where the engagement protrusion 33 of the one movable piece 31 is engaged with the engagement recess and a lock release position separated therefrom, and both the movable pieces 31. , 32, and an interlocking swinging double arm 30 projecting so as to interlock and connect with both movable pieces 31, 32 from a rotating shaft 35 positioned between the two movable pieces 31, 32. Stopper 3 that temporarily holds each in the locked position and unlocked position Thus, when one movable piece 31 is pushed and moved forward to the lock position, the other movable piece 32 moves backward via the interlocking swinging double arm 30, and the other movable piece 32 is pushed forward. By moving, one movable piece 31 moves backward to the unlocking position via the interlocking swinging double arm 30.

  A second aspect of the present invention is the telescoping scaffolding plate according to the first aspect, wherein the pair of movable pieces 31, 32 of the lock mechanism R, the rotating shaft 35, the interlocking swinging double arm 30 and the stopper 34 are the other scaffolding plate. It is characterized by being attached to a lock box 29 that is mounted at a required location of the member 6.

  A third aspect of the present invention is the telescoping scaffolding plate according to the first or second aspect, wherein the stopper 34 of the lock mechanism R is attached to a compression spring 38 provided on one movable piece 31 and the tip of the spring 38. The spherical body 40 pressed against the opposite side surface of the other movable piece 32 and the opposite side surface of the other movable piece 32 provided at positions corresponding to the lock position and the unlock position of the one movable piece 31, respectively. The spherical body 40 includes concave and recessed portions 41 and 42 that can be freely fitted and removed.

  According to a fourth aspect of the present invention, in the telescoping scaffolding plate according to any one of the first to third aspects, the engagement recess provided on one of the two scaffolding plate members 4 and 6 in which the lock mechanism R is interposed It consists of the hole part a formed in the scaffold board member 6 by the fixed pitch in the length direction.

  The effect of the invention by the above solution will be described with reference numerals of the embodiments described later. According to the telescopic scaffolding plate of the invention according to claim 1, the lock mechanism R is provided with the two scaffolding plate bodies 2 and 3. The engaging recesses provided in one scaffolding plate member 6 of the two opposing scaffolding plate members 4 and 6 at a constant pitch in the length direction of the scaffolding plate, and the movable pieces 31 and 32 provided in the other scaffolding plate member 4 are interlocked. Since it includes the swinging double arm 30 and the stopper 34, the number of parts is small and the structure is simple. Therefore, the manufacturing cost of the scaffolding plate 1 can be reduced, the failure is reduced, and the service life can be extended. Further, when the lock mechanism R is used, the operation is very simple because it is only necessary to push the rear end portions of the movable pieces 31 and 32.

  According to the second aspect of the present invention, the movable pieces 31 and 32, the interlocking swinging double arm 30 and the stopper 34 can be attached to the lock box 29, so that the unit can be formed. It becomes.

  According to the invention of claim 3, the stopper 34 of the lock mechanism R is attached to the compression spring 38 provided on one movable piece 31 and the tip of the spring 38, and on the opposite side surface of the other movable piece 32. Since the spherical body 40 to be pressed and the concave side portions 41 and 42 on the opposite side surface of the other movable piece 32 and into which the spherical body 40 can be freely fitted and removed, the structure of the stopper 34 is simple and compact. Becomes easy.

  As in the invention according to claim 4, the engaging recess provided in one of the two scaffold plate members 4 and 6 in which the lock mechanism R is interposed is provided at a constant pitch in the length direction of the one scaffold plate member 6. Therefore, the weight of the scaffold plate member can be reduced and the weight of the scaffold plate can be reduced.

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (a) is an overall schematic perspective view of the telescopic scaffolding plate 1 according to the present invention, and (b) is an arrow X in (a). 2 is an enlarged cross-sectional view taken along line YY in FIG. 1B. The extendable scaffolding plate 1 is composed of a pair of scaffolding plate bodies 2 and 3 which are combined so as to be stretchable in the length direction of the scaffolding plate, and both the scaffolding plate bodies 2 and 3 are shown in FIG. 1 (b) and FIG. As can be seen, a total of ten scaffold plate members 4, 5, 6, 7 and 8 each of which is arranged in parallel with each other at a predetermined interval in the width direction of the scaffold plate, Scaffold plate members 4, 5, 5, 5, 5 of the plate body 2 are disposed so as to be relatively movable between the scaffold plate members 6, 7, 7, 7, 8 of the other scaffold plate body 3 in the length direction of the scaffold plate. Has been.

  One end of the scaffold plate members 4, 5, 5, 5, 5 in one scaffold plate body 2 in the longitudinal direction and the scaffold plate members 6, 7, 7, 7, 8 of the other scaffold plate body 3 One end in the length direction is connected to each other by the band plates 9 and 10, and the other end in the length direction of the scaffold plate of the scaffold plate members 4, 5, 5, 5, 5 of one scaffold plate body 2 and The other end of the scaffold plate members 6, 7, 7, 7, and 8 in the other scaffold plate body 3 in the length direction of the scaffold plate extends over all the scaffold plate members 4, 5, 6, 7, and 8, respectively. The band plates 11 and 12 are externally connected to each other.

  FIG. 2 shows a cross-sectional structure of a portion where the other end portions of the scaffold plate members 4, 5, 5, 5, 5 of one scaffold plate body 2 are interconnected by one band plate 11. The band plate 11 is screwed (or riveted) to the other end of each of the scaffold plate members 4, 5, 5, 5 and 5 of one scaffold plate body 2, and the other band plate 12 is not shown. However, screws 13 (or rivets) are fixed to the other end portions of the scaffold plate members 6, 7, 7, 7, 8 of the other scaffold plate body 3, whereby the scaffold plate bodies 2, 3 are They are connected to each other so that they can move relative to each other in the plate length direction.

As shown in FIGS. 1 and 2, telescopic operation handles 25 and 26 each having a rod-like body are provided at both ends of the scaffold plate main bodies 2 and 3 in the length direction of the scaffold plate. That is, (b) of FIG.
Shows a handle 26 provided at one end of the scaffold plate body 3, and this handle 26 is the opposite ends of the scaffold plate members 6, 7, 7, 7, 8 constituting the scaffold plate body 3 in the scaffold plate width direction. The scaffold plate members 6 and 8 are horizontally mounted between brackets 27 and 27. As described above, since the handle 26 is horizontally mounted between the distal ends of the scaffold plate members 6 and 8 at both ends of the scaffold plate body 3 in the scaffold plate width direction, the distal ends of the intermediate scaffold plate members 7, 7, 7 are respectively provided. The scaffold plate members 7, 7, 7 with their tip portions removed and the scaffold plate members 6, 8 on both ends thereof are connected to each other by the band plate 10. The attachment structure of the handle 25 provided at one end of the scaffold board body 2 is the same as that of the handle 26.

  A scaffold plate member 4 on one end side in the scaffold plate width direction of the one scaffold plate body 2 and a scaffold plate member 6 on one end side in the scaffold plate width direction of the other scaffold plate body 3 facing the scaffold plate member 6. A locking mechanism R is interposed between the two scaffolding plate bodies 2 and 3 to prevent relative movement between the two scaffolding plate main bodies 2 and 3 and to lock the scaffolding plate main bodies 2 and 3 in a required expansion / contraction position.

  All the scaffold plate members 4, 5, 6, 7, and 8 constituting the pair of scaffold plate bodies 2 and 3 are each made of an aluminum extrusion mold material, and all these scaffold plate members 4, 5, 6, 7, and 8 are formed. 2, the two outermost scaffold plate members 4 and 8 in the width direction of the scaffold plate are each formed of a grooved material with a lip as shown in FIG. 2, and the opening O side of the grooved material faces outward. The lip portions 23 of the scaffold plate members 4 and 8 made of the grooved material with lips can be used as a clue portion.

  As shown in FIG. 3A, the scaffold plate members 4 and 8 are formed from the bottom wall portion 22 that connects the opposite side wall portions 21 and 21 and the side wall portions 21 and 21, and the distal end portion of each side wall portion 21. It is formed in a groove shape by a lip portion 23 projecting inward in a substantially L shape, and a reinforcing ridge portion 24 is formed on the bottom wall portion 22 on the center side in the width direction, The scaffold plate member 4 in which the lock mechanism R is interposed is provided with a lock box mounting opening 28 as shown in the figure at a required portion of the reinforcing ridge 24.

  As can be seen from FIG. 2, the scaffold plate member 5 constituting a part of one scaffold plate body 2 and the scaffold plate member 7 constituting a part of the other scaffold plate body 3 have the same sectional shape. An extrusion mold material, that is, a rectangular tube-shaped mold material having a vertically long rectangular cross section.

  FIG. 3B shows the scaffold plate member 6 facing the scaffold plate member 4 in which the lock mechanism R is interposed, that is, the scaffold plate member 4 on one side of the scaffold plate width direction in one scaffold plate body 2. It is a perspective view which shows the scaffold board member 6 of the scaffold board width direction one end side of the other scaffold board main body 3, This scaffold board member 6 connects a pair of cylindrical parts 6a and 6a and both cylindrical parts 6a and 6a on both sides. The connecting wall portion 6b is formed with a plurality of holes a as engaging recesses at a constant pitch in the length direction of the scaffold plate member 6.

  Next, the lock mechanism R will be described. One of the scaffold plate members 6 and 6 between which the lock mechanism R is interposed is connected to the connecting wall portion 6b of the engagement recess portion as described above. Are formed at a constant pitch in the length direction of the scaffold plate member 6 (see FIG. 3 (b)), and the other scaffold plate member 4 is provided at the required location thereof as shown in FIG. As shown in FIG. 2, a lock box mounting opening 28 is provided, and a lock box 29 is fitted into the opening 28. In the lock box 29, a pair of movable pieces 31 and 32, which will be described later, and an interlocking swinging double arm are provided. 30, stopper 34, etc. are attached. A lock box 29 fitted in the lock box mounting opening 28 of the scaffold plate member 4 is fixed with a screw 38, and the box 29 is shown on the front side in FIGS. 4 (a) and 4 (b). The cover 39 is attached as described above.

  The movable pieces 31, 32 attached to the lock box 29, the interlocking swinging double arm 30, the stopper 34, and the like will be described. The scaffold plate member in the lock box 29 with the two movable pieces 31, 32 being adjacent to each other. 6 is arranged so as to be movable forward and backward by a fixed stroke with respect to the engaging recess a side, and only one movable piece 31 is provided with an engaging protrusion 33 at the tip thereof. The movable piece 31 moves forward and backward between a lock position where the engagement protrusion 33 is engaged with the engagement recess a and a lock release position where the engagement protrusion 33 is detached from the recess a. Is moved in the opposite direction to the one movable piece 31 by the swing of the interlocking swinging double arm 30, that is, when one movable piece 31 moves forward, it moves backward, and when it moves backward, it moves forward. Composed.

  The interlocking swinging double arm 30 is attached to a rotating shaft 35 pivotally supported by the lock box 29 so as to be positioned between both movable pieces 31 and 32, and includes a pair of arm portions 30a and 30b. One arm portion 30a is plunged into a recess 31a provided in one movable piece 31, and the other arm portion 30b is plunged into a recess 32a provided in the other movable piece 32. When one movable piece 31 is pushed forward and moved forward to the locked position, the interlocking swinging double arm 30 is swung clockwise, and the other movable piece 32 is moved backward, and this other movable piece is moved. When the piece 32 is pushed in the forward direction, the interlocking swing double arm 30 swings counterclockwise, and one movable piece 31 moves backward from the lock position to the lock release position. A locking presser piece 31b and an unlocking presser piece 32b are attached to the rear ends of the movable pieces 31, 32, respectively.

  4 and 5, the stopper 34 is attached to the compression coil spring 38 inserted into the spring insertion hole 37 provided in one movable piece 31 and the tip of the compression coil spring 38, and the other movable piece is movable. The sphere 40 is pressed against the opposing side surface of the piece 32, and the recessed portions 41 and 42 are provided at two predetermined positions in the front and rear of the opposing side surface of the other movable piece 32, and the sphere 40 can be fitted and removed. Therefore, the concave portion 41 is temporarily fitted with the spherical body 40 when one movable piece 31 comes to the locked position, and temporarily holds the one movable piece 31 (see FIG. 5A). 4A and 4B, the spherical body 40 is fitted when the one movable piece 31 comes to the unlocked position, and the one movable piece 31 is temporarily held at the unlocked position in FIG. See)).

  When adjusting the length of the telescopic scaffolding plate 1 provided with the lock mechanism R configured as described above, first, as shown in FIG. 5, one movable piece 31 is held in the locked position. Then, by pushing the lock release pressing piece 32b at the rear end of the other movable piece 32, the interlocking swinging double arm 30 swings counterclockwise around the pivot 35, and FIG. As shown in FIG. 1, one movable piece 31 is moved backward from the lock position to the lock release position. Thereby, the lock of the lock mechanism R is released, and the two scaffold board main bodies 2 and 3 are relatively movable. At this time, one movable piece 31 is held in the unlocked position by the stopper 34.

  In this way, the scaffolding plate bodies 2 and 3 of the scaffolding plate 1 held in the unlocked position are relatively moved, and the length of the scaffolding plate 1 is adjusted appropriately. When the two scaffold board main bodies 2 and 3 are moved relative to each other, the telescopic operation handles 25 and 26 provided at the ends of the respective scaffold board main bodies 2 and 3 are gripped to facilitate the telescopic operation. Thus, after the scaffold plate 1 is adjusted to the required length, when the lock holding piece 31b at the rear end of one movable piece 31 is pushed, the one movable piece 31 is moved from the unlocked position to the locked position. The engagement protrusion 33 is moved forward, and engages with the engagement recess a of the scaffold plate member 6, and the lock mechanism R is locked. At this time, the one movable piece 31 is held in the locked position by the stopper 34. As a result, the scaffold plate 1 is held and fixed to the adjusted length.

  As described above, in the telescopic scaffolding plate 1, the lock mechanism R is connected to one scaffolding plate member 6 of the two scaffolding plate members 4, 6 facing both the scaffolding plate bodies 2, 3 in the length direction of the scaffolding plate. It consists of a hole a which is a recess for engagement provided at a constant pitch, and movable pieces 31 and 32 provided on the other scaffold plate member 4, an interlocking swinging double arm 30 and a stopper 34, and has a small number of parts. Since the structure is simple, the production cost of the scaffolding plate 1 can be reduced, the failure is less, and the service life can be extended. Further, when using the lock mechanism R, it is only necessary to push either the locking presser piece 31b or the unlocking presser piece 32b which is the rear end of the rear end of each of the movable pieces 31 and 32. Therefore, the operation becomes very easy.

  Moreover, in the above-mentioned embodiment, although the engaging recessed part consists of the hole part a formed in the length direction in the one scaffold board member 6 by the fixed pitch, an engaging recessed part is such a scaffold board member. The rack member formed by alternately and continuously forming the concave portions and the convex portions may be attached to the scaffold plate member 6. However, if the hole portion a is directly formed in the scaffold plate member 6 as in this embodiment, the weight of the scaffold plate member can be reduced, and the weight of the scaffold plate can be reduced.

  Further, as in the embodiment, since the movable pieces 31 and 32, the interlocking swinging double arm 30 and the stopper 34 are attached to the lock box 29, the unit can be formed, so that attachment and detachment with respect to the scaffold plate member 4 are facilitated.

(a) is the whole schematic perspective view of the expansion-contraction type scaffolding plate concerning this invention, (b) is an enlarged view of the part shown by the arrow X of (a). It is the YY line expanded sectional view of (b) of FIG. (a) is a perspective view which shows one of the scaffold board members in which a locking mechanism is interposed, (b) is a perspective view which shows the other scaffold board member. (a) is a plan view of the lock mechanism in the unlocked position, and (b) is a front view of the lock mechanism with a cover attached. (a) is a plan view of the locking mechanism in the locked position, and (b) is a longitudinal sectional view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Telescopic scaffolding board 2, 3 Scaffolding board main body 4-8 Scaffolding board member R Lock mechanism 29 Lock box 30 Interlocking swinging double arm 31 One movable piece (movable piece with an engaging projection piece)
32 Other movable piece 33 Engagement protrusion 34 Stopper

Claims (4)

A pair of scaffolding plate bodies each consisting of a plurality of scaffolding plate members are connected so as to be relatively movable in the length direction of the scaffolding plate, and the relative movement of both scaffolding plate bodies is prevented between two scaffolding plate members facing each other. In a telescoping scaffolding board that is interposed via a locking mechanism that
The locking mechanism is provided with engaging recesses at a constant pitch in the length direction of the scaffolding plate in one of the two opposing scaffolding plate members of the two scaffolding plate main bodies, and the other scaffolding plate member is disposed with respect to the engaging recessing side. A pair of adjacent movable pieces that move forward and backward, and only one of the movable pieces has an engagement protrusion at the tip thereof, and the engagement protrusion of the one movable piece is engaged with the engagement recess. A pair of movable pieces that move forward and backward between a locked position and an unlocked position that is released therefrom, and an interlocking swinging double arm that projects so as to be interlocked and connected to both movable pieces from a rotating shaft located between the two movable pieces; A stopper that is interposed between the two movable pieces and temporarily holds one of the movable pieces at the locked position and the unlocked position, respectively, and pushes one movable piece forward to move to the locked position, The other movable piece is via an interlocking swinging double arm Backward moving Te, by advancing movement by pressing the other movable piece, telescopic scaffolding board one movable piece is adapted to move backward to the lock release position through the interlocking Yuraten twin arm.   The telescopic scaffolding plate according to claim 1, wherein the pair of movable pieces, the rotating shaft, the interlocking swinging double arm and the stopper of the locking mechanism are attached to a lock box attached to a required portion of the other scaffolding plate member. .   The stopper of the locking mechanism is a compression spring provided on one movable piece, a sphere attached to the tip of this spring and pressed against the opposite side surface of the other movable piece, and on the opposite side surface of the other movable piece, The telescopic scaffolding plate according to claim 1 or 2, comprising a concave and recessed portion that is provided at a position corresponding to a lock position and a lock release position of the one movable piece, and into which the sphere can be fitted and removed. 4. The engaging recess provided in one of the two scaffold plate members on which the lock mechanism is interposed is formed of holes formed in the one scaffold plate member at a constant pitch in the length direction thereof. The telescopic scaffold board described in 1.

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