JP7406268B2 - stage scaffolding jack - Google Patents

Description

The present disclosure relates to stage scaffold jacks.

For example, at a construction site, a civil engineering work site, etc., a stage scaffold is sometimes constructed as a scaffold for performing various works (see, for example, Patent Document 1). The stage scaffolding of Patent Document 1 includes a building frame configured by combining a plurality of vertical members and horizontal members, an elevating building frame attached to the upper end of the building frame, and a plurality of floor plates installed on the elevating building frame. It is equipped and can be carried in the assembled state.

JP2006-299536A

By the way, in the case of a stage scaffold that can be carried in an assembled state as in Patent Document 1, since the stage scaffold is small, the area of the work floor composed of a plurality of floor plates is not so large. Conceivable.

However, with large stage scaffolding, the area of the work floor becomes large, so it may be necessary to partially adjust the height of the work floor so that it is level. When trying to adjust the height of the work floor using the stage scaffolding of Patent Document 1, it is necessary to adjust the height of the elevating building frame on which the floorboard is installed depending on the part, but the elevating building frame is located at the top of the lower building frame. The height cannot be adjusted depending on the part because it is only attached to the body and does not have a height adjustment mechanism.

The present disclosure has been made in view of this point, and its purpose is to enable height adjustment of a stage scaffold with a large work floor area.

In order to achieve the above object, a first aspect of the present disclosure provides a stage scaffolding including a deck beam having a horizontally extending pipe material and a panel material installed on the deck beam and forming a working floor. Supporting stage scaffolding jacks may be provided. A jack for stage scaffolding is inserted from above into a support made of a cylindrical member disposed below the stage scaffolding, and includes a threaded rod material having a thread formed on the outer peripheral surface and extending in the vertical direction, and the threaded rod material. a threaded member which is formed into a cylindrical shape and whose lower end surface abuts the upper end surface of the support column and which is threaded onto the thread of the rod; It is equipped with a clamp that grips the pipe material.

According to this configuration, when the threaded rod with the threaded member screwed is inserted into the column, the lower end surface of the threaded member comes into contact with the upper end surface of the column, so the clamp is held in a state protruding upward from the column. be done. By gripping the pipe material constituting the stage scaffolding with this clamp, the stage scaffolding is supported at a predetermined height by the pillars and stage scaffolding jacks. For example, if the threaded rod is not rotated and the threaded member is rotated around the threaded rod, the threaded rod moves vertically relative to the threaded member, so the height of the stage scaffolding can be adjusted. becomes possible. At this time, by changing the direction of rotation of the threaded member, the threaded bar can be moved upward or downward, and by increasing the amount of rotation of the threaded member, the threaded bar can be moved upward or downward. If the amount of vertical movement is increased and the amount of rotation of the threaded member is decreased, the amount of vertical movement of the threaded rod material will be reduced, making it easy to make fine height adjustments.

In a second aspect of the present disclosure, an operating member may be provided that protrudes radially outward from the outer circumferential surface of the screwing member. According to this configuration, when rotating the screwing member, the operator can easily rotate the screwing member by holding the operating member.

A clamp according to a third aspect of the present disclosure includes an upper clamping member and a lower clamping member that abut the outer peripheral surface of the pipe material from above and below, respectively, and clamp the pipe material in the radial direction, and the upper clamping member a connecting member that connects the other end of the upper clamping member and the other end of the lower clamping member so that the one end of the member and the one end of the lower clamping member can rotate in a direction in which the one end of the member and the one end of the lower clamping member move toward and away from each other; , a fastening member that fastens one end of the upper holding member and one end of the lower holding member in a direction in which they approach each other.

According to this configuration, by rotating the upper clamping member in a direction in which one end side of the upper clamping member and one end side of the lower clamping member are separated from each other, the pipe material is placed between the upper clamping member and the lower clamping member. can be easily placed. After arranging the pipe material between the upper clamping member and the lower clamping member, one end of the upper clamping member and one end of the lower clamping member are brought close to each other, and then fastened by a fastening member. , the pipe material can be firmly gripped in the radial direction.

In the fourth aspect of the present disclosure, a plate member extending radially outward of the threaded bar member may be fixed to the upper part of the threaded bar member. The lower holding member of the clamp can be fixed to the upper surface of the plate.

According to this configuration, a wide range of the lower holding member of the clamp can be fixed to the threaded rod material via the plate material, so that the fixing strength of the clamp can be increased.

The clamp according to the fifth aspect of the present disclosure is configured such that the axis of the pipe material is located on an extension of the axis of the threaded rod material when the pipe material is gripped, so that alignment is possible. It's easy to do.

As described above, by supporting the stage scaffolding with the stage scaffolding jack, it is possible to easily adjust the height of each part of the stage scaffolding having a large work floor area.

FIG. 2 is a side view showing a state in which the stage scaffold is supported by the stage scaffold jack according to the embodiment. FIG. 2 is a perspective view of the stage scaffolding from above, with panel materials omitted. It is a perspective view which expands and shows the deck of a part of stage scaffolding. FIG. 4 is a view corresponding to FIG. 3 showing a state in which the deck beam is rotated. FIG. 2 is a perspective view of a deck beam with a long overall length. It is a perspective view of a deck beam with a short overall length. It is a side view of the part which connected two deck beams by the rotation type beam joint. It is a top view of the part which connected two deck beams by the rotation type beam joint. It is a side view of the 1st connection part of a rotation type beam joint. It is a side view of the 2nd connection part of a rotation type beam joint. It is a side view of a fastener. FIG. 3 is a side view of a portion where two deck beams are connected by a first non-rotating beam joint. FIG. 3 is a perspective view of the first non-rotating beam joint. FIG. 3 is a perspective view of a second non-rotating beam joint. FIG. 3 is a perspective view of a third non-rotating beam joint. FIG. 6 is a perspective view of a fourth non-rotating beam joint. It is a side view which expands and shows the stage scaffolding jack and support column in the state which supported the stage scaffolding. It is a front view of the stage scaffolding jack. It is a side view of the jack for stage scaffolding. It is a top view of the stage scaffolding jack. FIG. 7 is a side view of a stage scaffolding jack according to another embodiment.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Note that the following description of preferred embodiments is essentially just an example, and is not intended to limit the present invention, its applications, or its uses.

FIG. 1 shows a state in which a stage scaffold 1 according to an embodiment of the present invention is supported at a predetermined height by a stage scaffold jack 100 and a support column 200. FIG. 2 is a perspective view of the stage scaffold 1. As shown in FIG. 1, the stage scaffold 1 includes a deck 2 and a panel material 3 (omitted in FIG. 2) that constitutes a work floor. The panel material 3 is composed of, for example, a wooden scaffolding board, a steel scaffolding board, an anti (cloth frame with a board), etc., and is particularly limited if it is a member that can constitute a work floor that serves as a scaffold for work. Not done. The size and shape of the panel material 3 can also be arbitrarily set according to the size and shape of the deck 2. Furthermore, the number of panel members 3 can also be changed depending on the size and shape of the deck 2. The work floor is basically installed horizontally.

Although the panel material 3 is omitted in FIG. 2, the stage scaffold 1 has a large area of work floor. The stage scaffold 1 is constructed depending on the type and content of the work, for example, at construction sites of various buildings and various civil engineering work sites. For example, the stage scaffolding 1 can also be used in repair work, maintenance work, etc. The stage scaffold 1 can also be constructed, for example, at the construction site or maintenance work site of various plants, such as large-scale production equipment or factory facilities. In various plants, a plurality of pipes are installed in a complicated manner on the outside of buildings, and the stage scaffolding 1 according to the present embodiment can be constructed when working on these pipes or on buildings.

As shown in FIG. 2, the deck 2 includes a first deck 2A, a second deck 2B, a third deck 2C, and a fourth deck 2D. The deck 2 may be composed of only the first deck 2A, or may be composed of any plurality of decks 2A to 2D, and the number is not limited to four. The first deck 2A is a deck assembled separately from the second to fourth decks 2B to 2D, and is also called a first deck. For example, by assembling the first deck 2A on the ground and then lifting it up, a working floor can be formed before the second to fourth decks 2B to 2D. After that, a worker goes up to the work floor of the first deck 2A and assembles the second deck 2B, and after completing the assembly of the second deck 2B, a worker goes up to the work floor of the second deck 2B and assembles the second deck 2B. By assembling up to the fourth deck 2D in this way, it is possible to gradually expand the work floor. In other words, the stage scaffolding 1 of this embodiment is a pre-floor construction type stage scaffolding that allows the scaffolding to be expanded sequentially after the existing deck (first deck 2A) is erected. Although not shown, handrails, baseboards, cloth materials, etc. may be attached to the stage scaffold 1.

The first deck 2A includes a proximal deck beam 20, a right short deck beam 21, a left short deck beam 22, and a first intermediate deck beam 23. The proximal deck beam 20 and the first intermediate deck beam 23 are the same and face each other. Further, the right short deck beam 21 and the left short deck beam 22 are the same and face each other. The lengths of the right short deck beam 21 and the left short deck beam 22 are set shorter than the lengths of the proximal deck beam 20 and the first intermediate deck beam 23. The base end deck beam 20 and the right short deck beam 21 are orthogonal to each other, and the base end deck beam 20 and the left short deck beam 22 are orthogonal to each other. Further, the first intermediate deck beam 23 and the right short deck beam 21 are orthogonal to each other, and the first intermediate deck beam 23 and the left short deck beam 22 are orthogonal to each other. Therefore, the proximal deck beam 20 and the first intermediate deck beam 23 are parallel, and the right short deck beam 21 and the left short deck beam 22 are parallel.

In this way, the four deck beams 20 to 23 constituting one deck 2A are arranged to form a rectangular shape in plan view. Then, the proximal deck beam 20 is connected to the right short deck beam 21 and the left short deck beam 22, and the first intermediate deck beam 23 is connected to the right short deck beam 21 and the left short deck beam 22. It is connected. The connection structure of these deck beams 20 to 23 will be described later. All four deck beams 20 to 23 may have the same length. Furthermore, the lengths of the deck beams 20 to 23 are not limited to two types, and can be set arbitrarily.As examples, from shortest to longest, 610mm, 914mm, 1219mm, 1524mm, 1829mm, etc. In this case, the decks 2A to 2D can be constructed by arbitrarily combining deck beams of five different lengths. The above-mentioned dimension can be, for example, a dimension from the center to the center of a beam joint attached to both ends of the deck beam.

Note that, for example, the lengths of the deck beams 20 and 23 (or the lengths of the deck beams 21 and 22) facing each other on the first deck 2A are the same. As a result, the first deck 2A has a rectangular or square shape. By predetermining the specifications such as the length, width, and vertical dimensions of the deck beams 20 to 23, the deck beams 20 to 23 can be made into standard products, and a systemized stage scaffolding 1 can be configured. can.

Further, the second deck 2B has a rectangular shape in plan view like the first deck 2A, and includes a first intermediate deck beam 23, a first right deck beam 24, a first left deck beam 25, and a It is composed of two intermediate deck beams 26. The first intermediate deck beam 23 is shared with the first deck 2A. The deck beams 23 to 26 constituting the second deck 2B have the same length.

Further, the third deck 2C has a rectangular shape in plan view like the second deck 2B, and includes a second intermediate deck beam 26, a second right deck beam 27, a second left deck beam 28, 3 intermediate deck beams 29. The second intermediate deck beam 26 is shared with the second deck 2B. The deck beams 26 to 29 constituting the third deck 2C have the same length.

Further, the fourth deck 2D has a rectangular shape in plan view similarly to the second deck 2B, and includes a third intermediate deck beam 29, a third right deck beam 30, a third left deck beam 31, and a third deck beam 29. 1 and a rear deck beam 32. The third intermediate deck beam 29 is shared with the third deck 2C. The deck beams 29 to 32 constituting the fourth deck 2D have the same length.

For example, as shown in FIG. 3, the first right deck beam 24 and the first left deck beam 25 of the second deck 2B may be shorter than the first intermediate deck beam 23 and the second intermediate deck beam 26. The deck beams 23 to 26 constituting the second deck 2B are connected to each other so as to be relatively rotatable around an axis extending in the vertical direction. By relatively rotating the deck beams 23 to 26, the second intermediate deck beam 26 can be moved closer to the first intermediate deck beam 23, ie, the first deck 2A, as shown in FIG. The first right side deck beam 24 and the first left side deck beam 25 are connected in an inclined attitude with respect to the first intermediate deck beam 23 so as to be in the rotational state shown in FIG. is connected to the first right deck beam 24 and the first left deck beam 25 in an inclined attitude. Thereby, the second intermediate deck beam 26 can be connected to the first right deck beam 24 and the first left deck beam 25 at a position close to the first deck 2A, so that the connection work from above the first deck 2A can be easily performed. Thereafter, as shown in FIG. 3, the deck beams 23 to 26 are relatively rotated so that they form a rectangle. Thereafter, the deck beams 23 to 26 are locked by a rotation prevention member (not shown) so that they do not rotate. The rotation prevention member may be any member that can fix the first left deck beam 25 and the first intermediate deck beam 23 while maintaining the angle of 90 degrees, for example, the first left deck beam 25. Examples include a cap-shaped member that fits into the end of the first intermediate deck beam 23, a clamp that fixes the end of the first left deck beam 25 and the first intermediate deck beam 23, and the like. Note that the third deck 2C and the fourth deck 2D can also be configured in the same manner as the second deck 2B.

(Deck beam configuration)
The deck beams 20 to 32 constituting the first to fourth decks 2A to 2D can have the same structure but differ in length. The deck beams 20 to 32 have a vertically symmetrical structure with a center line extending in the horizontal direction as the center of symmetry. Further, the names of the deck beams 20 to 32 described above are only given for convenience of explanation. FIG. 5 shows an example of a relatively long deck beam 20 (23 to 32), and FIG. 6 shows an example of a relatively short deck beam 21 (22). The first to fourth decks 2A to 2D may be configured only with the deck beam 20 shown in FIG. 5, or the first to fourth decks 2A to 2D may be configured only with the deck beam 21 shown in FIG. Good too.

As shown in FIG. 5, the deck beam 20 includes an upper pipe material 40, a lower pipe material 41, one side connecting material 42, the other side connecting material 43, and an intermediate pipe material (short support) 44. ing. The upper pipe material 40 and the lower pipe material 41 are made of, for example, steel pipes having a circular cross section, and specifically, they are made of members such as single-pipe construction materials or cloth materials that have conventionally constituted temporary scaffolding. be. Therefore, the outer diameters of the upper pipe material 40 and the lower pipe material 41 are the same as those of the single pipe building material, cloth material, etc.

The upper pipe material 40 extends horizontally. The lower pipe material 41 is arranged downwardly away from the upper pipe material 40 and extends in parallel to the upper pipe material 40. The outer diameter of the upper pipe material 40 and the outer diameter of the lower pipe material 41 are the same, but may be different. Further, the length of the upper pipe material 40 and the length of the lower pipe material 41 are the same. The length of the deck beam 20 corresponds to the length of the upper pipe material 40. The direction perpendicular to the longitudinal direction of the deck beam 20 in plan view is defined as the left-right direction of the deck beam 20, and the left-right direction of the deck beam 20 can also be called the width direction of the deck beam 20.

The one-side connecting member 42 and the other-side connecting member 43 are respectively fixed to the upper pipe material 40 and the lower pipe material 41 by, for example, welding, and the upper pipe material 40 material and the lower pipe material 41 It is a member for connecting. The one-side connecting member 42 extends from one end of the upper pipe member 40 to one end of the lower pipe member 41, and is composed of a pair of left and right metal plates 42a and 42b arranged at a distance from each other in the left-right direction. has been done. The left plate material 42a extends continuously from the lower part of the outer peripheral surface of one end of the upper pipe material 40 to the upper part of the outer peripheral surface of one end of the lower pipe material 41, and also extends in the longitudinal direction of the deck beam 20. It extends and is offset to the left from the axes of the upper pipe material 40 and the lower pipe material 41 in plan view. The right plate 42b is parallel to the left plate 42a, and is offset to the right from the axes of the upper pipe 40 and lower pipe 41 in plan view. In plan view, the left and right plate materials 42a and 42b are positioned so as to be hidden by the upper pipe material 40.

The other side connecting member 43 extends from the other end of the upper pipe member 40 to the other end of the lower pipe member 41, and is composed of a pair of left and right plate members 43a and 43b that are spaced apart from each other in the left and right direction. ing. The left plate material 43a extends continuously from the lower part of the outer peripheral surface of the other end of the upper pipe material 40 to the upper part of the outer peripheral surface of the other end of the lower pipe material 41, and extends in the longitudinal direction of the deck beam 20. It also extends to the left, and is offset to the left from the axes of the upper pipe material 40 and the lower pipe material 41 in plan view. The plate material 43b on the right side is parallel to the plate material 43a on the left side, and is offset to the right from the axis of the upper pipe material 40 and the lower pipe material 41 in plan view. The one side connecting member 42 and the other side connecting member 43 have the same structure. Therefore, the deck beam 20 has a symmetrical structure with the center of symmetry being a straight line extending vertically through the central portion in the longitudinal direction.

The intermediate pipe material 44 is made of, for example, a steel pipe, and extends from a longitudinally intermediate portion of the upper pipe material 40 to a longitudinally intermediate portion of the lower pipe material 41. The upper end portion of the intermediate pipe material 44 is fixed to the lower portion of the outer peripheral surface of the upper pipe material 40 via an upper bracket 44a. The lower end portion of the intermediate pipe material 44 is fixed to the upper portion of the outer peripheral surface of the lower pipe material 41 via a lower bracket 44b. The intermediate pipe material 44 can also be fixed to the upper pipe material 40 and the lower pipe material 41 by welding or the like. Therefore, the upper pipe material 40 and the lower pipe material 41 are connected not only at both end portions in the longitudinal direction but also at the middle portion thereof, so that the deck beam 20 can ensure high strength. Note that the number of intermediate pipe members 44 is not limited to one, and may be two or more. The intermediate pipe material 44 may have an insertion portion into which a wedge provided on the scaffold component is inserted. Note that if the upper pipe material 40 and the lower pipe material 41 are short, the intermediate pipe material 44 may be omitted.

The horizontal dimension of the deck beam 20 is set shorter than the vertical dimension. That is, there is only one upper pipe material 40 constituting the deck beam 20, no other pipe material is arranged on the side of the upper pipe material 40, and there is also only one lower pipe material 41. Therefore, no other pipe material is disposed on the side of the lower pipe material 41. The upper pipe material 40 and the lower pipe material 41 are arranged so as not to be lined up in the left-right direction in plan view. Specifically, the lower pipe material 41 is located directly below the upper pipe material 40, and therefore, in a plan view, the axis of the upper pipe material 40 and the axis of the lower pipe material 41 overlap. become. By arranging the upper pipe material 40 and the lower pipe material 41 in this manner, the horizontal dimension of the deck beam 20 becomes equal to the outer diameter of the upper pipe material 40 to the lower pipe material 41. Note that the horizontal dimension of the brackets 44a and 44b of the intermediate pipe material 44 may be larger than the outer diameter of the upper pipe material 40 or the lower pipe material 41, but the difference is slight and the size of the deck beam 20 Since it is only a part in the longitudinal direction, there is almost no problem when configuring the deck 2. Further, the horizontal dimension of the brackets 44a, 44b of the intermediate pipe material 44 may be set to be equal to or less than the outer diameter of the upper pipe material 40 to the lower pipe material 41.

The members constituting the deck beam 21 shown in FIG. 6 differ only in the lengths of the upper pipe material 40 and the lower pipe material 41 from those constituting the deck beam 20 shown in FIG. Since they basically have the same structure, they are given the same reference numerals as in FIG. 5 and their explanation will be omitted.

(Rotating beam joint)
As shown in FIGS. 3 and 4, when connecting the deck beams 23 to 26 constituting the second deck 2B so as to be relatively rotatable, a rotary beam joint 60 is used to connect the deck beams 23 to 26. Connecting. The rotating beam joint 60 has a vertically symmetrical structure with a center line extending in the horizontal direction as the center of symmetry. As shown in FIGS. 7A and 7B, the rotary beam joint 60 includes a first connecting portion 61 and a second connecting portion 62, both of which are made of a high-strength metal material. 7A and 7B show a case where the first intermediate deck beam 23 and the first right deck beam 24 are connected. The pivot beam joint 60 connects one end of the first intermediate deck beam 23 and one end of the first right deck beam 24 to each other. In addition to the examples shown in FIGS. 7A and 7B, the rotary beam joint 60 can also be used to connect other deck beams.

The first connecting portion 61 of the rotary beam joint 60 is inserted between the pair of left and right plates 42a, 42b that constitute the one side connecting member 42 of the first intermediate deck beam 23, and the pair of plates 42a, 42b. The first connecting portion 61 can also be used as a member inserted between the pair of left and right plates 43a, 43b constituting the other side connecting member 43 and connected to the pair of plates 43a, 43b.

Specifically, the first connecting portion 61 includes a plate-shaped main body portion 61a that is inserted between the pair of plates 42a and 42b of the first intermediate deck beam 23. The main body portion 61a extends in the vertical direction along the plates 42a and 42b, and also extends in the longitudinal direction of the first intermediate deck beam 23. The longitudinal dimension of the main body portion 61a is set longer than the dimensions of the plate members 42a and 42b in the same direction. Thereby, the main body portion 61a is inserted between the plate members 42a and 42b, and projects from between the plate members 42a and 42b toward both sides of the first intermediate deck beam 23 in the longitudinal direction. Since the first connecting portion 61 is inserted from one end side of the first intermediate deck beam 23 toward between the plates 42a and 42b, the tip end of the first connecting portion 61 is on the tip side in the insertion direction, with the insertion direction being a reference. The proximal end of the first connecting portion 61 is the end located on the proximal side in the insertion direction.

A portion of the main body portion 61a near the tip is a portion that protrudes from between the plate members 42a and 42b. An insertion hole 61b into which a fastener 63 as shown in FIG. 9 is inserted is formed in a portion near the tip of the main body portion 61a so as to penetrate in the thickness direction. The fastener 63 includes a first rod-shaped portion 63a and a second rod-shaped portion 63b that are orthogonal to each other. The tip of the first rod-shaped portion 63a is rotatable around a rotation axis 63c. When the first connecting part 61 tries to move in the direction of coming out from between the plates 42a and 42b with the first rod-shaped part 63a inserted into the insertion hole 61b, the first rod-shaped part 63a hits the edge of the plates 42a and 42b. Since they are in contact with each other, the first connecting portion 61 will not come out from between the plates 42a and 42b. By pulling out the first rod-shaped part 63a from the insertion hole 61b and removing the fastener 63, the first connecting part 61 can be pulled out from between the plates 42a and 42b. The fastener 63 can also be attached so as to penetrate, for example, the plate materials 42a and 42b. Further, the fastener 63 is attached to, for example, the plate material 42a or the main body portion 61a with a wire, chain, or the like (not shown) for preventing falling.

As shown in FIG. 8A, the base end portion of the main body portion 61a of the first connecting portion 61 is provided with a rotation shaft portion 61c extending in the vertical direction. The rotation shaft portion 61c has a circular cross section in the horizontal direction, and is made of, for example, a circular pipe material, a cylindrical member, or the like. The upper end and lower end of the rotation shaft 61c are fixed to the upper and lower ends of the main body 61a by welding or the like, respectively. A gap S is formed between the outer circumferential surface of the rotation shaft portion 61c and the vertical edge portion on the base end side of the main body portion 61a.

As shown in FIGS. 7A and 7B, the second connecting portion 62 of the rotary beam joint 60 is located between the pair of left and right plates 42a and 42b that constitute the one side connecting member 42 of the first right deck beam 24. This is a member that is inserted into and connected to the pair of plate materials 42a and 42b. The second connecting portion 62 can also be used as a member inserted between the pair of left and right plates 43a, 43b constituting the other side connecting member 43 and connected to the pair of plates 43a, 43b.

Specifically, the second connecting portion 62 includes a plate-shaped main body portion 62a that is inserted between the pair of plates 42a and 42b of the first right deck beam 24. The main body part 62 a extends in the vertical direction along the plates 42 a and 42 b like the main body part 61 a of the first connecting part 61 , and also extends in the longitudinal direction of the first right deck beam 24 . The longitudinal dimension of the main body portion 62a is set longer than the dimensions of the plate members 42a and 42b in the same direction. Thereby, the main body portion 62a is inserted between the plate members 42a, 42b, and projects from between the plate members 42a, 42b toward both sides of the first right deck beam 24 in the longitudinal direction. Since the second connecting portion 62 is inserted from one end side of the first right deck beam 24 toward between the plates 42a and 42b, the tip end of the second connecting portion 62 is on the tip side in the insertion direction with the insertion direction as a reference. The proximal end of the second connecting portion 62 is the end located on the proximal side in the insertion direction.

A portion of the main body portion 62a near the tip is a portion that protrudes from between the plate members 42a and 42b. Similar to the first connecting part 61, an insertion hole 62b into which a fastener 63 as shown in FIG. .

A cylindrical portion 62c extending in the vertical direction is provided at the base end portion of the main body portion 62a of the second connecting portion 62. The cylindrical portion 62c has a circular cross section in the horizontal direction, and is made of, for example, a circular pipe material. The rotation shaft portion 61c of the first connecting portion 61 is rotatably inserted into the cylinder portion 62c. In other words, the inner diameter of the cylindrical portion 62c and the outer diameter of the rotary shaft portion 61c are set so that a predetermined gap is formed between the inner peripheral surface of the cylindrical portion 62c and the outer peripheral surface of the rotary shaft portion 61c. ing. Further, the thickness of the peripheral wall portion of the cylindrical portion 62c is set to be thinner than the gap S shown in FIG. 8A.

When connecting the first connecting portion 61 and the second connecting portion 62, first, the rotation shaft portion 61c is removed from the main body portion 61a. Thereafter, the rotating shaft portion 61c is inserted into the cylindrical portion 62c of the second connecting portion 62. Next, the upper and lower ends of the rotating shaft portion 61c are welded to the main body portion 61a of the first connecting portion 61. This allows the first connecting portion 61 and the second connecting portion 62 to rotate relative to each other around the rotation shaft portion 61c.

Therefore, as shown in FIGS. 3 and 4, by connecting the deck beams 23 to 26 using the rotary beam joint 60, the second deck 2B changes from a rectangle to a parallelogram to a parallelogram in plan view. can be transformed into a rectangle.

As shown in FIG. 1, since the first intermediate deck beam 23 is a member constituting the first deck 2A, it needs to be connected to the right short deck beam 21 and the left short deck beam 22. In this case, a connecting plate part 62d (shown only in FIG. 3) made of the same plate material as the main body part 62a is provided on the cylindrical part 62c of the second connecting part 62 of the rotary beam joint 60, and this connecting plate part 62d is , it can be inserted between the pair of left and right plates constituting the one side connecting member of the left short deck beam 22 and attached using the above-mentioned fasteners. Connection with the right short deck beam 21 can be similarly made by the connection plate portion 62d.

(Non-rotating beam joint)
In addition to being able to connect the deck beams 20 to 32 with the above-mentioned rotating beam joint 60, as shown in FIGS. ~32 can also be connected. The first to fourth non-rotating beam joints 70 to 73 may be used as necessary. The first to fourth non-rotating beam joints 70 to 73 have a vertically symmetrical structure with respect to a center line extending in the horizontal direction as a center of symmetry. Therefore, the first to fourth non-rotating beam joints 70 to 73 can be used by being turned upside down.

As shown in FIG. 10, the first non-rotating beam joint 70 is a member for connecting two deck beams 36 and 37 to each other in a state in which they are arranged in series in the longitudinal direction. Although FIG. 10 shows an example in which one end of the deck beam 36 and one end of the deck beam 37 are connected, deck beams arranged in series can be connected by the first non-rotating beam joint 70. It is. Although the first non-rotating beam joint 70 is not shown in FIG. 1, if the deck beams 36 and 37 connected in series are included in the stage scaffolding 1 as shown in FIG. 1. A non-rotating beam joint 70 may be used.

The first non-rotating beam joint 70 is connected between a pair of left and right plates 42a and 42b forming one side connecting member 42 of the deck beam 36, and between the left and right plates forming one side connecting member 42 of the deck beam 37. It is composed of a plate inserted between a pair of plates 42a and 42b, and the thickness and vertical dimension of this plate are the same as the thickness and vertical dimension of the main body 61a of the rotary beam joint 60, respectively. It is. The length of the first non-rotating beam joint 70 is set so that it protrudes from between the plates 42a and 42b of the deck beam 36 when inserted between the plates 42a and 42b. , an insertion hole 70b into which the fastener 63 is inserted is formed. The length of the first non-rotating beam joint 70 is set so that it protrudes from between the plates 42a and 42b of the deck beam 37 when inserted between the plates 42a and 42b, and the protruding portion An insertion hole 70c into which the fastener 63 is inserted is formed. That is, the connection structure between the deck beams 36 and 37 by the first non-rotating beam joint 70 is the same as the connection structure by the rotating beam joint 60, except that it cannot rotate. Therefore, like the rotating beam joint 60, the first non-rotating beam joint 70 can also be attached to the deck beams 20 to 32 so as not to come off. At the center of the first non-rotating beam joint 70, a main body portion 70A made of a circular tube extending in the vertical direction is provided. A through hole 70a passing through the peripheral wall is formed in the main body 70A.

The second non-rotating beam joint 71 shown in FIG. 12 is a member for connecting orthogonal components such as the proximal deck beam 20 and the right short deck beam 21 shown in FIG. 1, for example. In addition to the base end deck beam 20 and the right short deck beam 21, the second non-rotating beam joint 71 is also used, for example, when connecting the third right deck beam 30 and the first back deck beam 32. Can be used. In the description of the second non-rotating beam joint 71, the proximal deck beam 20 and the right short deck beam 21, which are orthogonal to each other, can also be referred to as a first deck beam and a second deck beam, respectively.

The second non-rotating beam joint 71 includes a main body portion (joint main body) 71a, a first connecting portion 71b, and a second connecting portion 71c. The main body portion 71a is made of a circular tube extending in the vertical direction, and its vertical dimension is set shorter than the vertical dimensions of the deck beams 20 to 32. A plurality of through holes 71f passing through the peripheral wall are formed in the main body 71a.

The first connecting portion 71b is made of a plate material similar to the main body portion 61a of the rotary beam joint 60, and the portion protruding from between the pair of left and right plates 42a and 42b that constitute the one-side connecting member 42 is , an insertion hole 71d into which the fastener 63 is inserted is formed. The second connecting portion 71c is made of a plate material similar to the main body portion 62a of the rotary beam joint 60, and the portion protruding from between the pair of left and right plates 42a and 42b that constitute the one-side connecting member 42 is , an insertion hole 71e into which the fastener 63 is inserted is formed. Therefore, the second non-rotating beam joint 71 can also be attached to the deck beams 20 to 32 in the same way as the rotating beam joint 60.

A proximal end portion of the first connecting portion 71b and a proximal end portion of the second connecting portion 71c are fixed to the outer peripheral surface of the main body portion 71a by, for example, welding. In plan view, the first connecting portion 71b and the second connecting portion 71c protrude in directions orthogonal to each other. Thereby, it is possible to connect orthogonal components such as the proximal deck beam 20 and the right short deck beam 21 to each other.

The third non-rotating beam joint 72 shown in FIG. 13 includes three orthogonal beam joints, such as the short right deck beam 21, the first intermediate deck beam 23, and the first right deck beam 24 shown in FIG. A member for connecting deck beams to each other. In addition to the short right deck beam 21, the first intermediate deck beam 23, and the first right deck beam 24, there are two deck beams arranged in series, and a deck beam orthogonal to these deck beams arranged in series. When connecting, a third non-rotating beam joint 72 can be used. In the description of the third non-rotating beam joint 72, the right short deck beam 21 and the first intermediate deck beam 23, which are orthogonal to each other, can also be referred to as a first deck beam and a second deck beam, respectively. The right deck beam 24 may be referred to as the third deck beam.

The third non-rotating beam joint 72 includes a main body portion (joint main body) 72a configured similarly to the main body portion 71a, the first connecting portion 71b, and the second connecting portion 71c of the second non-rotating beam joint 71; It includes a first connection part 72b and a second connection part 72c, as well as a third connection part 72g. A through hole 72f into which a pin (not shown) can be inserted from the outside is formed in the main body portion 72a. Further, insertion holes 72d and 72e into which the fasteners 63 are inserted are formed in the first connecting portion 71b and the second connecting portion 71c, respectively.

The third connecting portion 72g is made of the same plate material as the first connecting portion 72b and the second connecting portion 72c, and is a pair of left and right plate materials 42a that constitute the one side connecting member 42 of the first right deck beam 24. , 42b and connected to the pair of plates 42a, 42b. An insertion hole 72h into which the fastener 63 is inserted is formed in the third connecting portion 72g.

The base end portion of the third connecting portion 72g is fixed to the outer peripheral surface of the main body portion 72a, for example, by welding or the like. In plan view, the second connecting portion 72c and the third connecting portion 72g protrude in directions orthogonal to each other. Further, the first connecting portion 72b and the third connecting portion 72g are arranged on the same straight line. Thereby, the right short deck beam 21, the first intermediate deck beam 23, and the first right deck beam 24 can be connected to each other. Note that the first connecting portion 72b and the third connecting portion 72g may protrude in directions perpendicular to each other in plan view.

The fourth non-rotating beam joint 73 shown in FIG. 14 is a member for connecting four deck beams to each other. For example, when connecting two deck beams arranged in series and two deck beams arranged in series in a direction perpendicular to these deck beams arranged in series, the fourth non-rotating beam joint 73 can be used.

The fourth non-rotating beam joint 73 has a main body portion configured similarly to the main body portion 72a, the first connecting portion 72b, the second connecting portion 72c, and the third connecting portion 72g of the third non-rotating beam joint 72. (Joint body) 73a, a first connecting portion 73b, a second connecting portion 73c, a third connecting portion 73g, and a fourth connecting portion 73i. A through hole 73f into which a pin (not shown) can be inserted from the outside is formed in the main body portion 73a. Further, insertion holes 73d, 73e, and 73h into which the fasteners 63 are inserted are formed in the first connecting portion 73b, the second connecting portion 73c, and the third connecting portion 73g, respectively.

The fourth connecting portion 73i is made of the same plate material as the first connecting portion 73b, the second connecting portion 73c, and the third connecting portion 73g. An insertion hole 73j into which the fastener 63 is inserted is formed in the fourth connecting portion 73i. The base end portion of the fourth connecting portion 73i is fixed to the outer circumferential surface of the main body portion 73a, for example, by welding or the like. In plan view, the first connecting portion 73b, the third connecting portion 73g, and the fourth connecting portion 73i protrude in directions orthogonal to each other. Further, the second connecting portion 73c and the fourth connecting portion 73i are arranged on the same straight line.

(Support structure for stage scaffolding)
Next, as shown in FIG. 1, the structure of the support structure 90 that supports the stage scaffold 1 will be explained. The support structure 90 is a structure for supporting the stage scaffolding 1 at a predetermined height from the installation surface 91 such as the ground or floor surface, and includes a plurality of supports 200 disposed below the stage scaffolding 1, It includes a plurality of stage scaffolding jacks 100 and a plurality of cloth materials 210. The support columns 200 are made of a circular tube material (cylindrical member), and are arranged at intervals in the width direction and depth direction of the stage scaffold 1. The horizontal position of the support column 200 is set so that the lower pipe material 41 forming the deck beams 20 to 32 is positioned directly above the support column 200. The upper part of the support column 200 is opened upward by a circular opening. The upper end surface of the support column 200 is configured to be a horizontal surface when the support column 200 is in a vertical state. Further, although a lower jack 205 is provided at the lower part of each support column 200, this lower jack 205 may be omitted. A plurality of pockets 200a are attached to each support column 200 at intervals in the vertical direction and the circumferential direction.

The cloth material 210 is a member for connecting the adjacent columns 200, 200, and a plurality of cloth materials 210 are provided in the vertical direction as necessary. Wedges 210a projecting downward are provided at both ends of the cloth material 210, respectively. The wedge 210a is driven into the pocket 200a of the support column 200 and fixed therein.

Support structure 90 may include braces 220. The brace 220 is also fixed to the pocket 200a of the support column 200 in the same way as the cloth material 210.

As shown in FIGS. 15 to 18, the stage scaffold jack 100 includes a threaded bar 110, a threaded member 120 that is threaded onto the threaded bar 110, and a clamp 130 that is fixed to the top of the threaded bar 110. It is equipped with The threaded rod material 110 has a cylindrical shape that extends in the vertical direction as a whole, and is a high-strength metal member. A thread 110a is formed on the outer peripheral surface of the threaded rod 110. In this embodiment, the thread 110a is formed continuously from the top to the bottom of the threaded bar 110; however, the thread 110a is not limited to this, and the thread 110a is formed only in the middle part of the threaded bar 110 in the vertical direction. It may be formed only in the upper part of the threaded bar material 110, or may be formed only in the lower part of the threaded bar material 110.

The outer diameter of the threaded rod 110 is set to be slightly smaller than the inner diameter of the support column 200, and has the same diameter from the top to the bottom. This allows the threaded rod 110 to be inserted into the column 200 from above. Although the insertion amount of the threaded rod material 110 into the support column 200 is not particularly limited, it can be, for example, 10 cm or more. The length of the threaded rod material 110 can be set to, for example, 20 cm or more, or 30 cm or more.

A plate member 111 that extends radially outward of the threaded bar member 110 is fixed to the upper portion of the threaded bar member 110 . The plate material 111 is also made of metal, and the lower surface of the plate material 111 is fixed to the upper part of the threaded rod material 110 by welding or the like. The plate material 111 may have a polygonal shape or a circular shape, for example.

The threaded member 120 is formed in a cylindrical shape to be threaded into the thread 110a of the threaded rod material 110, and is a high-strength member made of metal. In this embodiment, the screwing member 120 has a cylindrical shape, but is not limited to this, and may have a shape other than the cylindrical shape. The outer diameter of the threaded member 120 is set to be the same as or larger than the outer diameter of the support column 200.

The lower end surface of the threaded member 120 is formed to be horizontal when threaded onto the threaded rod 110 inserted into the support column 200. Since the threaded rod 110 is only inserted into the support 200, the lower end surface of the threaded member 120 screwed onto the threaded rod 110 comes into contact with the upper end surface of the support 200, thereby suppressing the fall of the threaded rod 110. has been done.

As shown in FIGS. 16 and 18, the stage scaffolding jack 100 includes an operating member 121 fixed to a threaded member 120. As shown in FIGS. The operating member 121 is made of a bar that protrudes radially outward from the outer peripheral surface of the screwing member 120, and is used to rotate the screwing member 120. In this embodiment, two operating members 121 are provided, but the number is not limited to this, and the number may be one, or three or more. The vertical dimension of the operating member 121 is set shorter than the vertical dimension of the screwing member 120.

As shown in FIG. 15, the clamp 130 is a device that grips the lower pipe material 41 that constitutes the stage scaffolding 1. As also shown in FIG. 16, the clamp 130 includes an upper clamping member 131, a lower clamping member 132, a connecting member 133, and a fastening member 134. The upper clamping member 131 and the lower clamping member 132 are members that contact the outer peripheral surface of the lower pipe material 41 from above and below, respectively, and clamp the lower pipe material 41 in the radial direction. The upper clamping member 131 and the lower clamping member 132 are made of, for example, a metal plate. Further, the connecting member 133 is a member for rotatably connecting the upper clamping member 131 and the lower clamping member 132. Further, the fastening member 134 is a member for fastening the distal end side of the upper holding member 131 and the distal end side of the lower holding member 132 in a direction in which they approach each other.

The side of the upper clamping member 131 and the lower clamping member 132 that are connected by the connecting member 133 is referred to as the "base end side" of the upper clamping member 131 and the lower clamping member 132, and the upper clamping member 131 and the lower clamping member 132 The side opposite to the side connected by the connecting member 133 in is referred to as the "tip side" of the upper clamping member 131 and the lower clamping member 132. The distal ends of the upper clamping member 131 and the lower clamping member 132 are one end side, and the proximal ends of the upper clamping member 131 and the lower clamping member 132 are the other end sides. Defining the direction of the clamp 130 in this way is only for convenience of explanation, and does not limit the usage state of the clamp 130.

As shown in FIG. 16, the lower surface of the lower holding member 132 is fixed to the upper surface of the plate material 111, so that it does not move relative to the threaded rod material 110. A lower circular arc portion 132 a formed in an arc shape corresponding to the outer shape of the lower pipe material 41 is provided at the upper portion of the lower holding member 132 . As shown in FIG. 18, two lower arcuate portions 132a are provided at intervals in the horizontal direction. As shown in FIG. 16, the base end side of the lower holding member 132 protrudes upward compared to the distal end side.

An upper arc portion 131a formed in an arc shape corresponding to the outer shape of the lower pipe material 41 is provided at the lower portion of the upper holding member 131. Two upper arcuate portions 131a are provided at intervals in the horizontal direction. The upper circular arc portion 131a is located above the lower circular arc portion 132a of the lower holding member 132. The interval between the two lower circular arc parts 132a is set wider than the interval between the two upper circular arc parts 131a.

The distal end side of the upper holding member 131 projects in the direction away from the proximal end side. As shown in FIG. 18, a notch 131b is formed on the tip side of the upper holding member 131. This notch 131b is a portion into which a fastening shaft portion 134a, which will be described later, is inserted, and is open toward the distal end side.

The connecting member 133 can be made of, for example, a round bar made of metal, and extends in the horizontal direction. A connecting member 133 passes through the proximal end of the upper clamping member 131 and the proximal end of the lower clamping member 132. The upper clamping member 131 or the lower clamping member 132 is rotatable with respect to the connecting member 133, so that the distal end side of the upper clamping member 131 and the distal end side of the lower clamping member 132 move toward and away from each other. The base end side of the upper clamping member 131 and the base end side of the lower clamping member 132 are connected by a connecting member 133 so as to be rotatable in the direction. The stage scaffolding jack 100 is installed so that the axial direction of the connecting member 133 and the axial direction of the lower pipe material 41 match.

The fastening member 134 includes a fastening shaft portion 134a, a nut 134b, and a support shaft 134c. The fastening shaft portion 134a is connected to the distal end side of the lower holding member 132 by a support shaft 134c. The support shaft 134c extends parallel to the connecting member 133. The fastening shaft portion 134a is rotatable around a support shaft 134c. A thread is formed on the outer peripheral surface of the fastening shaft portion 134a.

The nut 134b is a member that is screwed into a threaded portion of the fastening shaft portion 134a. The flange portion of the nut 134b comes into contact with the peripheral edge of the notch portion 131b of the upper holding member 131.

When gripping the lower pipe material 41 with the clamp 130, first loosen the nut 134b, and then rotate the fastening shaft portion 134a to remove it from the notch 131b of the upper holding member 131. By pulling out the fastening shaft portion 134a from the notch 131b, the upper clamping member 131 can be rotated upward, thereby causing the distal end side of the upper clamping member 131 and the distal end side of the lower clamping member 132 to be rotated upward. and separate. After placing the lower pipe material 41 on the lower arc portion 132a of the lower clamping member 132, the upper clamping member Rotate 131. Thereafter, when the fastening shaft portion 134a is rotated and inserted into the notch portion 131b and the nut 134b is tightened, the flange portion of the nut 134b comes into pressure contact with the peripheral edge portion of the notch portion 131b of the upper holding member 131. As a result, the distal end side of the upper clamping member 131 and the distal end side of the lower clamping member 132 are fastened in the direction in which they approach each other, so that both the lower circular arc portion 132a and the upper circular arc portion 131a are connected to the outer peripheral surface of the lower pipe material 41. Press firmly against the

As shown in FIG. 15, the clamp 130 is configured such that the axis 401 of the lower pipe material 41 is located on the extension line 400 of the axis of the threaded rod material 110 when the clamp 130 is gripping the lower pipe material 41. There is. Since the axis of the threaded bar 110 substantially coincides with the axis of the support 200 and extends in the vertical direction, an extension 400 of the axis of the threaded bar 110 also extends in the vertical direction. On the other hand, the axis 401 of the lower pipe material 41 extends in the horizontal direction. Therefore, the fixed position of the clamp 130 with respect to the threaded rod material 110 is set such that the extension line 400 of the axis of the threaded rod material 110 and the axis 401 of the lower pipe material 41 are perpendicular to each other.

(Operations and effects of embodiments)
As explained above, when the threaded rod material 110 with the threaded member 120 screwed thereon is inserted into the column 200, the lower end surface of the threaded member 120 comes into contact with the upper end surface of the column 200, so that the clamp 130 is separated from the column 200. It is held in an upwardly protruding state. By gripping the lower pipe material 41 constituting the stage scaffolding 1 with this clamp 130, the stage scaffolding 1 is supported at a predetermined height by the pillars 200 and the stage scaffolding jacks 100. Since it is the lower pipe material 41 that is gripped by the clamp 130, the clamp 130 does not get in the way when the panel material 3 is installed on the upper pipe material 40.

When adjusting the height of the stage scaffold 1, the threaded member 120 is rotated around the threaded rod 110. Thereby, the threaded rod material 110 moves in the vertical direction with respect to the screw member 120, so the stage scaffold 1 can be made higher or lower. If the amount of rotation of the screwing member 120 is increased, the amount of movement of the stage scaffolding 1 will be increased, and if the amount of rotation of the screwing member 120 is decreased, the amount of movement of the stage scaffolding 1 will be reduced, making fine height adjustments easy. can be done. Moreover, since the operating member 121 is fixed to the screwing member 120, the operator can easily rotate the screwing member 120.

The embodiments described above are merely illustrative in all respects and should not be interpreted in a limiting manner. Furthermore, all modifications and changes that come within the scope of equivalents of the claims are intended to be within the scope of the present invention. In the above embodiment, the clamp 130 is configured to grip a circular pipe material, but the clamp 130 is not limited to this, and may be a clamp that grips a square pipe, for example.

Further, a stage scaffolding jack 100 according to another embodiment shown in FIG. 19 may include a swinging mechanism for the clamp 130. In this form, a plate-shaped first attachment part 132c is formed at the lower part of the lower holding member 132 so as to protrude downward, and a plate-shaped second attachment part 111c is formed on the upper surface of the plate material 111 so as to protrude upward. It is formed to protrude. A plurality of first attachment portions 132c and a plurality of second attachment portions 111c are each provided. Corresponding first attachment portions 132c and second attachment portions 111c are in a state where they overlap in the thickness direction. A horizontally extending shaft member 140 is provided to pass through the first attachment portion 132c and the second attachment portion 111c. The first attachment part 132c is rotatably connected to the second attachment part 111c by a shaft member 140. This makes it possible to rotate the clamp 130 around the horizontal axis with respect to the plate material 111, that is, to swing the clamp 130.

As explained above, the stage scaffolding jack according to the present invention can be used to adjust the height of a stage scaffolding.

1 Stage scaffolding 41 Lower pipe material 100 Stage scaffolding jack 110 Threaded rod material 111 Plate material 120 Threaded member 130 Clamp 131 Upper clamping member 132 Lower clamping member 133 Connecting member 134 Fastening member 200 Support

Claims (3)

A stage scaffolding jack for supporting a stage scaffolding comprising a deck beam having a pipe material extending in the horizontal direction, and a panel material installed on the deck beam and forming a working floor,
a threaded rod material inserted from above into a support made of a cylindrical member disposed below the stage scaffold, having a thread formed on its outer peripheral surface and extending in the vertical direction;
a threaded member formed in a cylindrical shape that threads onto the thread of the threaded rod material, and whose lower end surface abuts the upper end surface of the support;
a clamp that grips the pipe material forming the stage scaffold ;
The clamp includes an upper clamping member and a lower clamping member that abut the outer circumferential surface of the pipe material from above and below, respectively, and clamp the pipe material in the radial direction, and one end side of the upper clamping member and the lower side. a connecting member that connects the other end of the upper clamping member and the other end of the lower clamping member such that the one end of the clamping member is rotatable in a direction in which the clamping members approach and separate from each other; and one end of the upper clamping member. and a fastening member that fastens the one end side of the lower holding member in a direction in which they approach each other,
A metal plate extending radially outward of the threaded rod is fixed to the upper part of the threaded rod,
The lower holding member of the clamp is fixed to the upper surface of the plate material . The stage scaffolding jack according to claim 1,
A stage scaffolding jack comprising an operating member protruding radially outward from the outer circumferential surface of the screwing member. The stage scaffolding jack according to claim 1 ,
In the stage scaffolding jack, the clamp is configured such that the axis of the pipe is located on an extension of the axis of the threaded rod when the clamp grips the pipe.