Temporary scaffolding foundation

Abstract

To facilitate installation of pile foundation.SOLUTION: Pile foundation 10, which is fixed to a ground surface G1 by a pile member P1 in a state of supporting a support A11 extending in a vertical direction, includes: a first member 20 having a shaft member 40 that is mounted on the lower end of the support A11 and has a spherical surface part 42 on the lower side, a first flat plate part 21 installed in a direction along the ground surface G1, and a first spherical recess 22 that projects upward from the first flat plate part 21 and covers the spherical surface part 42 from one side in a horizontal direction perpendicular to the vertical direction; and a second member 30 having a second flat plate part 31 installed in the direction along the ground surface G1, and a second spherical recess 32 which projects upward from the second flat plate part 31 and covers the spherical surface part 42 from the other side in the horizontal direction. In the sandwich state where the spherical surface part 42 is sandwiched between the first recess 22 and the second recess 32 in the horizontal direction, the first flat plate part 21 and the second flat plate part 31 are fixed to the ground surface G1 by the pile member P1.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention provides Temporary scaffolding foundation Regarding. [Background technology]

[0002] BACKGROUND ART When a structure such as scaffolding is installed on a slope, a technique is known in which the base member is swung relative to the support so that the base member is aligned with the sloped ground.

[0003] Patent Document 1 discloses a foundation leg that supports a temporary house from below. In the foundation leg of Patent Document 1, a spherical insert is provided at the lower end of a columnar support member. When the insert is inserted into a support hole in a bottom plate that is installed on the ground, a universal joint is formed that allows the bottom plate to swing within a predetermined angle range relative to the support member. Then, by driving a pile member into the bottom plate with the bottom surface of the bottom plate in close contact with the sloped ground, the bottom plate is stably fixed to the installation location.

[0004] Patent Document 2 discloses a rotating jack base in which a base plate is rotatable relative to a jack pipe. With the jack pipe standing vertically, the base plate is aligned with an inclined surface, and the lower end of the jack is fixed to the standing plate by inserting bolts or the like into the nail holes in the base plate. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-177027 [Patent Document 2] Publication number 5-44387 Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, due to the effects of embankment problems across the country and increasingly severe heavy rainfall, measures to prevent collapses on steep slopes have become an urgent issue. Construction on sloped land requires the erection of temporary scaffolding along the slope. With the increase in construction projects on sloped land, there is a demand for the development of temporary scaffolding that can be easily installed in a short period of time.

[0007] The foundation leg in Patent Document 1 cannot be easily installed because it requires a lot of work to insert the insert of the bundle member into the bottom plate. Specifically, the bottom plate consists of a disk and a support, and in the case of Patent Document 1, this support needs to be inserted into the bundle member in advance.

[0008] In the case of the rotating jack base of Patent Document 2, the direction in which the base plate rotates is limited to one direction, and the angle cannot be adjusted in both elevation and azimuth, making it unable to flexibly adapt to slopes.

[0009] Therefore, the present invention provides a method for swinging the base member relative to the support, which allows the base member to be aligned with the inclined ground. Temporary scaffolding foundation The present invention aims to make installation easier. [Means for solving the problem]

[0010] (1) The present invention Temporary scaffolding foundation is fixed to the ground by pile members while supporting the vertically extending supports. Temporary scaffolding foundation a first member having an axis member attached to a lower end of the support and having a spherical portion on its lower side, a first flat plate portion installed in a direction along the ground, and a spherical first recessed portion protruding upward from the first flat plate portion and covering the spherical portion from one side in a left-right direction perpendicular to the up-down direction; and a second member having a second flat plate portion installed in a direction along the ground, and a spherical second recessed portion protruding upward from the second flat plate portion and covering the spherical portion from the other side in the left-right direction, wherein in a clamped state in which the spherical portion is clamped between the first recessed portion and the second recessed portion in the left-right direction, the first flat plate portion and the second flat plate portion are fixed to the ground by the stake member. Temporary scaffolding foundation is.

[0011] Temporary scaffolding foundation According to the invention, a so-called universal joint is formed by sandwiching the spherical surface portion between the first recess and the second recess in a left-right direction different from the direction in which the support rod extends. Therefore, there is no need for preparation such as attaching the first member and the second member to the shaft member in advance, and it is easier to Temporary scaffolding foundation can be installed.

[0012] (2) The above (1) Temporary scaffolding foundation In the above, a first pile hole into which the pile member is inserted may be formed in the first flat plate portion, and a second pile hole into which the pile member is inserted may be formed in the second flat plate portion, and in the clamped state, the first flat plate portion may overlap the upper side of the second flat plate portion, and the first pile hole may be connected to the second pile hole.

[0013] With this configuration, the first flat plate portion and the second flat plate portion are fixed by the stake members, and the stake members can prevent the first recessed portion and the second recessed portion from coming off in the left-right direction. Temporary scaffolding foundation can support the column more stably.

[0014] (3) (2) above Temporary scaffolding foundation In the above, the first member may further include a protrusion that protrudes from an edge of the first flat plate portion toward the ground and covers a side surface of the second flat plate portion in the clamped state.

[0015] With this configuration, the first member and the second member can be easily positioned.

[0016] (4) (2) or (3) above Temporary scaffolding foundation In the above, the second member may further include spikes protruding toward the ground from a lower surface of the second flat plate portion that faces the ground.

[0017] When the second flat plate portion is installed along the ground, the spikes penetrate into the ground, preventing the second flat plate portion from slipping off the ground. In this way, the worker can release his / her hands from the second member and perform other tasks, etc., and the spikes prevent the second flat plate portion from slipping off the ground. Temporary scaffolding foundation This makes it easier to install.

[0018] (5) (1) above Temporary scaffolding foundation In the above, the pile member may include a pile body to be driven into the ground, and a flat plate-shaped head provided at an upper end of the pile body, and the head may be formed with a first elongated hole and a second elongated hole that are aligned in the left-right direction and are each long in the left-right direction, the first flat plate portion may be formed with a first bolt hole that communicates with the first elongated hole in the clamped state, and the second flat plate portion may be formed with a second bolt hole that communicates with the second elongated hole in the clamped state, and in the clamped state, the first flat plate portion may be fixed to the head by inserting a first bolt into the first bolt hole and the first elongated hole, and the second flat plate portion may be fixed to the head by inserting a second bolt into the second bolt hole and the second elongated hole.

[0019] With this configuration, the first and second members can be slid left and right while they are temporarily attached to the head, allowing for fine adjustment of the left and right position of the shaft member. [Effects of the Invention]

[0020] According to the present invention, Temporary scaffolding foundation This makes it easier to install. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is an explanatory diagram of a temporary scaffolding according to an embodiment. [Figure 2] FIG. 1 is a perspective view of a foundation of a temporary scaffold according to an embodiment. [Figure 3] FIG. 2 is a side view of the foundation of the temporary scaffolding according to the embodiment. [Figure 4]FIG. 2 is an exploded perspective view of the foundation of the temporary scaffolding according to the embodiment. [Figure 5] FIG. 2 is a side view of the shaft member according to the embodiment. [Figure 6] FIG. 3 is a side view of a first member according to the embodiment. [Figure 7] FIG. 2 is a plan view of a first member according to the embodiment. [Figure 8] FIG. 4 is a side view of a second member according to the embodiment. [Figure 9] FIG. 4 is a plan view of a second member according to the embodiment. [Figure 10] FIG. 10 is a side view of a second member according to a modified example. [Figure 11] FIG. 10 is a perspective view of a second member according to a modified example, as viewed from below. [Figure 12] FIG. 10 is a perspective view of a base of a temporary scaffolding according to a modified example. [Figure 13] FIG. 10 is a side view of a foundation of a temporary scaffolding according to a modified example. [Figure 14] FIG. 10 is an exploded perspective view of a base of a temporary scaffolding according to a modified example. [Figure 15] FIG. 10 is an exploded side view of a foundation of a temporary scaffolding according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0022] <Embodiment> Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0023] <Configuration of temporary scaffolding A1> In accordance with an embodiment Temporary scaffolding foundation Reference numeral 10 denotes a foundation that is fixed to the ground by pile members while supporting vertically extending supports. Temporary scaffolding foundation 10 is used, for example, as the foundation of the temporary scaffolding A1. Temporary scaffolding foundation The scaffolding 10 may be used for purposes other than the temporary scaffolding A1, such as the foundation of a structure (for example, temporary stairs, temporary rails) to be set up on a slope.

[0024] 1 is an explanatory diagram of a temporary scaffolding A1 according to an embodiment. The temporary scaffolding A1 is installed on a steep slope (for example, 5% or more). The temporary scaffolding A1 comprises a plurality of posts A11, a plurality of cross members A12 that connect the plurality of posts A11 horizontally, and a plurality of support members A12 that support the plurality of posts A11. Temporary scaffolding foundation 10 and equipped.

[0025] Here, the direction in which the support A11 extends is defined as the “vertical direction.” In the example of Fig. 1, the vertical direction coincides with the vertical direction (direction of gravity), but the vertical direction may also be a direction tilted from the vertical direction toward the horizontal direction.

[0026] A construction device A2 for construction on sloping ground is installed at the top of the temporary scaffolding A1. The construction device A2 is, for example, a boring device for drilling holes in sloping ground. Note that the construction device A2 may be a device other than a boring device, such as a crane device for transporting materials to sloping ground.

[0027] Temporary scaffolding foundation The temporary scaffolding A1 is attached to the lower end of the support A11 and fixed to the ground G1 of the sloping ground by the pile member P1. This allows the temporary scaffolding A1 to be stably installed on the ground G1 of the sloping ground.

[0028] < Temporary scaffolding foundation 10 Configurations> Figure 2 shows Temporary scaffolding foundation 10 is a perspective view. Temporary scaffolding foundation The device 10 includes a first member 20, a second member 30, and a shaft member 40. Each of these members 20, 30, and 40 is made of metal (specifically, steel or iron). The first member 20 and the second member 30 are combined together to form a Temporary scaffolding foundation The first member 20 and the second member 30 function as a "base member" of the shaft member 40. The first member 20 and the second member 30 are in a state where they sandwich the shaft member 40 in the "left-right direction" that is perpendicular to the up-down direction, and are able to swing relative to the shaft member 40.

[0029] 2 and subsequent figures are appropriately labeled with arrows indicating the up-down, left-right, and front-rear directions. Here, the "front-rear direction" is a direction perpendicular to the up-down and left-right directions.

[0030] Figure 3 shows Temporary scaffolding foundation 10 as viewed from the arrow III in FIG. 2. Temporary scaffolding foundation 10. In FIG. 3, the vertical direction in which the support A11 extends is aligned with the vertical direction of the drawing. In addition, in FIG. 3, the ground G1 on the slope, the support A11, and the pile member P1 are each depicted by virtual lines. Temporary scaffolding foundation The components 20, 30, and 40 included in the device 10 will now be described.

[0031] <Regarding the shaft member 40> Figure 4 shows Temporary scaffolding foundation 5 is an exploded perspective view of the shaft member 40. FIG. The shaft member 40 has a cylindrical portion 41 attached to the lower end of the support A11 and a spherical portion 42 provided at the lower end of the cylindrical portion 41.

[0032] The cylindrical portion 41 includes an inner peripheral surface 41a with an inner diameter larger than the outer diameter of the support A11, and two bolt holes 41b (FIG. 5) that penetrate from the outer periphery of the cylindrical portion 41 to the inner peripheral surface 41a. The axial direction of the cylindrical portion 41 extends in the same direction as the support A11. With the support A11 housed inside the inner peripheral surface 41a, the shaft member 40 is attached to the lower end of the support A11 by inserting bolts into the two bolt holes 41b and fastening them with nuts.

[0033] The spherical portion 42 is a portion having a spherical shape with a radius R3 on at least a part of its outer circumferential surface. The spherical portion 42 may have regions recessed inward from the spherical shape, such as recesses 43 and flat surfaces 44. The recesses 43 are regions on the circumferential surface of the spherical portion 42 that are recessed inward from the spherical shape. The spherical portion 42 in FIG. 5 has four recesses 43 at intervals of 90 degrees around the axial direction.

[0034] The recesses 43 are preferably provided at equal intervals around the axial direction in the spherical portion 42. With this configuration, the portions of the circumferential surface of the spherical portion 42 that do not form the recesses 43 (the portions that have a spherical shape) are also provided at equal intervals around the axial direction, which allows the first member 20 and the second member 30 to swing more smoothly.

[0035] The flat surface 44 is a region obtained by cutting out a flat portion of the spherical shape at the lower end of the spherical portion 42. Note that the recess 43 and the flat surface 44 do not necessarily have to be provided in the spherical portion 42. For example, the flat surface 44 may not be provided, and the spherical portion 42 may have a spherical shape at the lower end as shown by the imaginary line 42a.

[0036] The spherical portion 42 has the recessed portion 43 and the flat surface 44, and thus the spherical portion 42 can be made lighter while maintaining the function of allowing the first member 20 and the second member 30 to swing.

[0037] <Regarding the first member 20> FIG. 6 is a side view of the first member 20. As shown in FIG. 7 is a plan view of the first member 20. FIG. 7 shows the first member 20 as seen from the direction of arrow VII in FIG.

[0038] The first member 20 is a member that pairs with the second member 30 and sandwiches the spherical portion 42. The first member 20 has a first flat plate portion 21 and a first recessed portion 22. The first flat plate portion 21 is a flat plate-like region that is installed in a direction along the ground surface G1. The first flat plate portion 21 has a substantially L-shape. In other words, the first flat plate portion 21 has a shape in which, for example, a substantially rectangular shape like the second flat plate portion 31 described below is cut out with a square-shaped cutout of approximately one-quarter of the region on the right rear side. The second recessed portion 32 described below is inserted into this cutout portion.

[0039] A first pile hole 21a into which the pile member P1 is inserted is formed in the first flat plate portion 21. The first pile hole 21a is, for example, a quadrangular hole (more specifically, a square hole). The first member 20 further includes three protrusions 23, 24, and 25 protruding from the edge of the first flat plate portion 21 toward the ground G1.

[0040] The first recess 22 is a spherical region that protrudes upward from the first flat plate portion 21 and covers one side in the left-right direction (for example, the left side) of the spherical portion 42. The first recess 22 is provided at the inner end (the right end in this embodiment) of the cutout portion of the first flat plate portion 21.

[0041] The first concave portion 22 has a concave region 22a that is recessed in a substantially quartered spherical shape, and ear regions 22b provided at both ends in the front-rear direction orthogonal to the vertical and left-right directions. The concave region 22a has a shape corresponding to the spherical surface portion 42 and can cover the left half in the left-right direction of the spherical surface portion 42. The concave region 22a is open on the right side and the upper side. Also, the inner radius R1 (half of the inner diameter) of the upper end E1 of the concave region 22a is smaller than the radius R3 of the spherical surface portion 42 (R1 < R3). Bolt holes 22c are formed in the two ear regions 22b, respectively.

[0042] <Regarding the second member 30> FIG. 8 is a side view of the second member 30. FIG. 9 is a plan view of the second member 30. FIG. 9 shows the second member 30 as viewed from the arrow IX in FIG. 8.

[0043] The second member 30 has a second flat plate portion 31 and a second concave portion 32. The second flat plate portion 31 is a flat plate-like region installed in the direction along the ground G1. A second pile hole 31a into which the pile member P1 is inserted is formed in the second flat plate portion 31. The second pile hole 31a is, for example, a quadrangular hole (more specifically, a square hole).

[0044] The second concave portion 32 is a spherical region that protrudes upward from the second flat plate portion 31 and covers the spherical surface portion 42 from the other side in the left-right direction (for example, the right side). The second concave portion 32 protrudes upward, for example, near the center in the left-right direction of the second flat plate portion 31.

[0045] The second concave portion 32 has a concave region 32a that is recessed in a substantially quartered spherical shape, and ear regions 32b provided at both ends in the front-rear direction. The concave region 32a has a shape corresponding to the spherical surface portion 42 and can cover the right half in the left-right direction of the spherical surface portion 42. The concave region 32a is open on the left side and the upper side. Also, the inner radius R2 (half of the inner diameter) of the upper end E2 of the concave region 32a is smaller than the radius R3 of the spherical surface portion 42 (R2 < R3) and is equal to the inner radius R1 (R2 = R1). Bolt holes 32c are formed in the two ear regions 32b, respectively.

[0046] < Temporary scaffolding foundation 10 ways to combine next, Temporary scaffolding foundation An example of how to combine 10 is explained below. Temporary scaffolding foundation 10 can be attached to the temporary scaffolding A1 afterwards, or Temporary scaffolding foundation After installing 10, Temporary scaffolding foundation A temporary scaffold A1 can be set up on top of the scaffold 10. Temporary scaffolding foundation When adding 10, Temporary scaffolding foundation We will explain two ways to assemble the unit, including placing 10 first.

[0047] < Temporary scaffolding foundation When retrofitting 10> First, the shaft member 40 is attached to the lower end of the support pillar A11. At this time, if a jack shaft for adjusting the vertical height is attached to the lower end of the support pillar A11, the jack shaft is rotated to raise the lower end of the support pillar A11 above the ground G1, and then the shaft member 40 is attached to the lower end of the support pillar A11 (i.e., the lower end of the jack shaft). More specifically, with the lower end of the support pillar A11 housed within the inner circumferential surface 41a, bolts are inserted into the two bolt holes 41b and fastened with nuts to attach the shaft member 40 to the lower end of the support pillar A11.

[0048] Next, the spherical portion 42 of the shaft member 40 is sandwiched between the first member 20 and the second member 30. Specifically, the first recess 22 and the second recess 32 are combined in the left-right direction with the left side of the spherical portion 42 covered by the first recess 22 and the right side of the spherical portion 42 covered by the second recess 32. This state in which the spherical portion 42 is sandwiched in the left-right direction between the first recess 22 and the second recess 32 is referred to as a "sandwiched state."

[0049] Here, the protrusion 23 of the first member 20 covers the left side surface of the second flat plate portion 31, thereby facilitating the left-right positioning of the first flat plate portion 21 and the second flat plate portion 31 (specifically, positioning the left side). Furthermore, the protrusion 24 of the first member 20 covers the right side surface of the second flat plate portion 31, thereby facilitating the left-right positioning of the first flat plate portion 21 and the second flat plate portion 31 (specifically, positioning the right side). Furthermore, the protrusion 25 of the first member 20 covers the front side surface of the second flat plate portion 31, thereby facilitating the front-rear positioning of the first flat plate portion 21 and the second flat plate portion 31 (specifically, positioning the front side). In this way, the protrusions 23, 24, and 25 make it easy to position the first member 20 and the second member 30.

[0050] It should be noted that at least one of the three protrusions 23, 24, and 25 may be omitted from the first member 20. For example, the protrusions 23 and 24 may be provided and the protrusion 25 may be omitted. Alternatively, the protrusions 23 and 25 may be provided and the protrusion 24 may be omitted. Alternatively, all of the three protrusions 23, 24, and 25 may be omitted.

[0051] 2, in the clamped state, the first flat plate portion 21 overlaps the upper side of the second flat plate portion 31, and the first pinhole 21a communicates with the second pinhole 31a in the vertical direction. Also, in the clamped state, the second recess 32 protrudes upward from the cutout portion of the first flat plate portion 21.

[0052] In the clamped state, the two bolt holes 22c communicate with the two bolt holes 32c in the left-right direction. In this state, bolts are passed through the bolt holes 22c, 32c and relatively loosely fastened (temporarily fastened) with nuts. As a result, the upper end E1 of the first recess 22 and the upper end E2 of the second recess 32 are mated, forming a circular opening with an inner diameter of (R1 + R2).

[0053] Here, since the inner radii R1 and R2 are both smaller than the radius R3 of the spherical portion 42, the spherical portion 42 is prevented from slipping out of the opening at the upper end formed by combining the first recess 22 and the second recess 32. Furthermore, since the first recess 22 and the second recess 32 have a shape (spherical) corresponding to the spherical portion 42, the first member 20 and the second member 30 are able to swing relative to the shaft member 40 in the clamped state.

[0054] That is, the first member 20 and the second member 30 can be rotated within a predetermined angle range in the left-right direction and the front-rear direction (all directions of the elevation angle and azimuth angle relative to the up-down direction) relative to the shaft member 40. Temporary scaffolding foundation In the present embodiment, the first recess 22 and the second recess 32 sandwich the spherical portion 42 in the left-right direction, forming a so-called universal joint. This allows the first member 20 and the second member 30 to swing, and the first flat plate portion 21 and the second flat plate portion 22 to be placed along the slope of the ground G1.

[0055] After the first flat plate portion 21 and the second flat plate portion 22 are installed along the slope of the ground G1, the nuts are fully fastened (finally tightened) onto the bolts passed through the bolt holes 22c and 32c. This suppresses the swinging of the first member 20 and the second member 30 relative to the shaft member 40.

[0056] Finally, with the pile member P1 inserted into the first pile hole 21a and the second pile hole 31a, the pile member P1 is driven vertically into the ground G1 with a hammer or the like. The head of the pile member P1 is larger than the first pile hole 21a, and the first flat plate portion 21 and the second flat plate portion 22 are sandwiched between the head of the pile member P1 and the ground G1, thereby fixing the first flat plate portion 21 and the second flat plate portion 22 to the ground G1.

[0057] For example, in the technology of Patent Document 1, in order to sandwich the spherical portion in the "up and down direction" in which the bundle member extends, it is necessary to insert the support member into the bundle member in advance. Temporary scaffolding foundationAccording to the present invention, a universal joint is formed by sandwiching the spherical portion 42 between the first recess 22 and the second recess 32 in the "left-right direction" different from the direction in which the support A11 extends. Therefore, after the shaft member 40 is attached to the support A11, the first member 20 and the second member 30 can be attached to the shaft member 40. As a result, there is no need for preparation such as attaching the first member 20 and the second member 30 to the shaft member 40 in advance, and therefore the process can be carried out more easily. Temporary scaffolding foundation 10 can be installed.

[0058] Also, Temporary scaffolding foundation In the present embodiment, the first flat plate portion 21 and the first recessed portion 22 are formed as a single member (first member 20), and the second flat plate portion 31 and the second recessed portion 32 are formed as a single member (second member 30). Therefore, by fixing the first flat plate portion 21 and the second flat plate portion 31 with the stake member P1, it is possible to prevent the first recessed portion 22 and the second recessed portion 32 from coming off in the left-right direction. In this way, Temporary scaffolding foundation According to 10, by driving the pile member P1, Temporary scaffolding foundation 10 is fixed to the ground G1, Temporary scaffolding foundation The connection between the universal joint portion 10 (the first recess 22, the second recess 32, and the spherical portion 42) can also be strengthened. Temporary scaffolding foundation 10 can support the support column A11 more stably.

[0059] < Temporary scaffolding foundation If you install 10 first> Next, Temporary scaffolding foundation The following explains how to assemble when first placing 10 on the ground G1. In this case, first, the spherical portion 42 of the shaft member 40 is sandwiched between the first member 20 and the second member 30, and in this state, the bolts are passed through the bolt holes 22c, 32c and temporarily fastened with nuts.

[0060] Next, the first flat plate portion 21 and the second flat plate portion 22 are placed along the slope of the ground G1, and the pile members P1 are inserted into the first pile hole 21a and the second pile hole 31a. Then, the pile members P1 are driven vertically into the ground G1 with a hammer or the like. This fixes the first member 20 and the second member 30 to the ground G1.

[0061] Thereafter, the angle of the shaft member 40 relative to the first member 20 and the second member 30 is adjusted. For example, the angle of the shaft member 40 is adjusted so that the axial direction of the tubular portion 41 of the shaft member 40 is aligned with the vertical direction. After adjusting the angle of the shaft member 40, nuts are tightened onto the bolts passed through the bolt holes 22c, 32c. This suppresses the swinging of the shaft member 40 relative to the first member 20 and the second member 30. Finally, the support column A11 is attached to the shaft member 40.

[0062] As mentioned above, Temporary scaffolding foundation According to 10, Temporary scaffolding foundation 10 can be retrofitted to support A11, Temporary scaffolding foundation 10 can be installed before the support A11. Temporary scaffolding foundation 10 installation can be done more flexibly depending on the construction method on site. Temporary scaffolding foundation 10 can be used universally.

[0063] <Modification> Modifications of the embodiment will be described below. In the following description, parts that are unchanged from the embodiment will be given the same reference numerals and descriptions thereof will be omitted.

[0064] <Modification of the second member> FIG. 10 is a side view of a second member 30a according to a modified example. FIG. 11 is a perspective view of the second member 30a as seen from below.

[0065] The second member 30a differs from the second member 30 of the embodiment in that it further includes spikes 33 protruding toward the ground G1 from a lower surface 31b of the second flat plate portion 31 that faces the ground G1, but is otherwise the same. In the example of Figures 10 and 11, six spikes 33 are provided on the lower surface 31b, but the number is not particularly limited.

[0066] When the second flat plate portion 31 is installed along the ground G1, the spikes 33 pierce the ground G1, thereby preventing the second flat plate portion 31 from shifting relative to the ground G1. In particular, if the ground G1 is a steep slope, and the worker releases the second member 30 after installing it on the ground G1, there is a risk that the second member 30 will shift down the slope due to gravity. With the second member 30a of this modified example, the spikes 33 dig into the ground G1, and the second member 30a can be fixed to a certain extent in a fixed position on the ground G1. Therefore, the worker can release his or her hands from the second member 30a to perform other tasks, and the spikes 33 will keep the second member 30a in place. Temporary scaffolding foundation 10 can be more easily installed.

[0067] < Temporary scaffolding foundation Variation of> FIG. 12 shows a modified example. Temporary scaffolding foundation 11 is a perspective view of FIG. Figure 13 shows Temporary scaffolding foundation 11 as viewed from the arrow XIII in FIG. Temporary scaffolding foundation 13, the ground G1 on the slope and the support pillar A11 are indicated by virtual lines.

[0068] Temporary scaffolding foundation The base 11 includes a shaft member 40, a first member 50, a second member 60, and a stake member 70. Each of these members 40, 50, 60, and 70 is made of metal (specifically, steel or iron), for example. Temporary scaffolding foundation In 11, the first member 50 and the second member 60 are fixed to the stake member 70 in a clamped state in which the shaft member 40 is sandwiched between the first member 50 and the second member 60 in the left-right direction.

[0069] Figure 14 shows Temporary scaffolding foundation 11 is an exploded perspective view of the Figure 15 shows Temporary scaffolding foundation 12 to 15 as appropriate. Temporary scaffolding foundation The first member 50, the second member 60 and the stake member 70 included in the structure 11 will now be described.

[0070] <Regarding the first member 50> The first member 50 is a member that pairs with the second member 60 and sandwiches the spherical portion 42. The first member 50 and the second member 60 are combined together. Temporary scaffolding foundation 14, the first member 50 has a first flat plate portion 51 and a first recessed portion 52.

[0071] The first flat plate portion 51 is a flat plate-shaped region that is installed in a direction along the ground G1. A first bolt hole 51a into which a bolt is inserted is formed in the first flat plate portion 51. The first bolt hole 51a is, for example, a circular hole. Furthermore, a recess 51b that accommodates the left half of a protrusion 71c (described below) is formed on the surface of the first flat plate portion 51 facing the ground G1. The recess 51b is longer in the left-right direction than the left half of the protrusion 71c and is open downward and to the right.

[0072] The first member 50 further includes a protruding portion 53 that protrudes toward the ground G1 from the edge of the first flat plate portion 51. The protruding portion 53 protrudes from the rear edge of the first flat plate portion 51 and covers the rear side surface of a head portion 71 (described later), and is used for positioning the first member 50 in the front-to-rear direction when fixing the first member 50 to the head portion 71.

[0073] The first recess 52 is a spherical region that protrudes upward from the right edge of the first flat plate portion 51 and covers one side (e.g., the left side) of the spherical portion 42 in the left-right direction. The first recess 52 has the same shape as the first recess 22 of the embodiment. That is, the first recess 52 has a recessed region 22a and an ear region 22b.

[0074] <Regarding the second member 60> The second member 60 has a shape that is symmetrical to the first member 50. The second member 60 has a second flat plate portion 61 and a second recessed portion 62. The second flat plate portion 61 is a region that is symmetrical to the first flat plate portion 51, and the second recessed portion 62 is a region that is symmetrical to the first recessed portion 52.

[0075] The second flat plate portion 61 is a flat plate-shaped region that is installed in a direction along the ground G1. A second bolt hole 61a into which a bolt is inserted is formed in the second flat plate portion 61. A recess 61b that accommodates the right half of a protrusion 71c (described later) is formed on the surface of the second flat plate portion 61 facing the ground G1. The recess 61b is longer in the left-right direction than the right half of the protrusion 71c, and is open downward and leftward.

[0076] The second member 60 further includes a protruding portion 63 that protrudes toward the ground G1 from the edge of the second flat plate portion 61. The protruding portion 63 protrudes from the rear edge of the second flat plate portion 61 and covers the rear side surface of a head portion 71 (described later), and is used for positioning the second member 60 in the front-to-rear direction when fixing the second member 60 to the head portion 71.

[0077] The second recess 62 is a spherical region that protrudes upward from the left edge of the second flat plate portion 61 and covers one side (for example, the right side) of the spherical portion 42 in the left-right direction. The second recess 62 has the same shape as the second recess 32 of the embodiment. That is, the second recess 62 has a recessed region 32a and an ear region 32b.

[0078] <Regarding the pile member 70> The pile member 70 has a pile body 72 to be driven into the ground G1, and a flat head portion 71 provided at the upper end of the pile body 72. As shown in FIG. 14 , the head portion 71 has a first elongated hole 71a and a second elongated hole 71b that are aligned in the left-right direction and are each long in the left-right direction. In addition, a protrusion 71c that protrudes in a direction away from the ground G1 is formed in the head portion 71 between the first elongated hole 71a and the second elongated hole 71b in the left-right direction. The protrusion 71c has, for example, a rectangular parallelepiped shape and is formed on the opposite side of the pile body 72.

[0079] < Temporary scaffolding foundation 11 ways to combine next, Temporary scaffolding foundation An example of how to combine 11 is explained below. First, the pile member 70 is driven vertically into the ground G1 using a hammer or the like. At this time, since the protrusion 71c is formed on the opposite side of the pile main body 72, it also functions as a driving protrusion (marker) for driving the pile member 70.

[0080] Next, the spherical portion 42 of the shaft member 40 is clamped between the first recess 52 of the first member 50 and the second recess 62 of the second member 60 (clamped state), and in this state, bolts are passed through the bolt holes 22c, 32c and temporarily fastened with nuts.

[0081] Thereafter, the first flat plate portion 51 and the second flat plate portion 61 are placed above the head portion 71. At this time, the left and right halves of the protrusion 71c are accommodated in the recess 51b of the first flat plate portion 51 and the recess 61b of the second flat plate portion 61, respectively. In addition, the protrusions 53, 63 each cover the rear side surface of the head portion 71. In this way, the recesses 51b, 61b are engaged with the protrusion 71c, and the protrusions 53, 63 are engaged with the rear side surface of the head portion 71, so that the first flat plate portion 51 and the second flat plate portion 61 are easily positioned above the head portion 71.

[0082] In the clamped state, when the first flat plate portion 51 and the second flat plate portion 61 are positioned above the head portion 71, the first bolt hole 51a communicates with the first elongated hole 71a, and the second bolt hole 61a communicates with the second elongated hole 71b. In this state, a bolt is passed through the first bolt hole 51a and the first elongated hole 71a and temporarily fastened with a nut, and a bolt is passed through the second bolt hole 61a and the second elongated hole 71b and temporarily fastened with a nut.

[0083] Next, the angle of the shaft member 40 relative to the first member 50 and the second member 60 is adjusted. For example, the angle of the shaft member 40 is adjusted so that the axial direction of the tubular portion 41 of the shaft member 40 is aligned with the vertical direction. After adjusting the angle of the shaft member 40, nuts are tightened onto the bolts passed through the bolt holes 22c and 32c. This suppresses swinging of the shaft member 40 relative to the first member 50 and the second member 60.

[0084] Thereafter, the left-right positions of the first member 50 and the second member 60 are adjusted. Here, the first elongated hole 71a and the second elongated hole 71b are each long in the left-right direction, and the recesses 51b, 61b are longer in the left-right direction than the protrusion 71c. Furthermore, no protrusions such as the protrusions 53, 63 are provided on the left-right edges of the first member 50 and the second member 60. Therefore, the first member 50 and the second member 60 can be slid left-right while they are temporarily fastened to the head 71. This allows fine adjustment of the left-right position of the shaft member 40.

[0085] After adjusting the left-right position, nuts are tightened onto the bolts passed through the first bolt holes 51a and the first elongated holes 71a, and nuts are tightened onto the bolts passed through the second bolt holes 61a and the second elongated holes 71b. This fixes the first member 50 and the second member 60 to the pile member 70. Finally, the support A11 is attached to the shaft member 40.

[0086] As mentioned above, Temporary scaffolding foundation According to the above-mentioned specification, the spherical portion 42 is sandwiched between the first recess 52 and the second recess 62 in the "left-right direction" different from the direction in which the support A11 extends, thereby forming a so-called universal joint. Therefore, there is no need for preparation such as attaching the first member 50 and the second member 60 to the shaft member 40 in advance, and therefore, it is easier to Temporary scaffolding foundation 11 can be installed.

[0087] <Other> The embodiments and modifications disclosed above are illustrative in all respects and are not restrictive. Temporary scaffolding foundation is not limited to the illustrated form, and may be in other forms within the scope of the present invention. [Explanation of symbols]

[0088] 10: Temporary scaffolding foundation 11: Temporary scaffolding foundation 20: First member 21: First flat plate portion 21a: First pile hole 22: First recess 22a: recessed area 22b: lug area 22c: bolt hole 23: Projection 24: Projection 25: Projection 30: Second member 30a: Second member 31: Second flat plate portion 31a: 2nd pile hole 31b: Bottom surface 32: 2nd recess 32a: recessed area 32b: lug area 32c: bolt hole 33: spike 40: shaft member 41: cylindrical portion 41a: inner peripheral surface 41b: bolt hole 42: spherical portion 42a: Virtual line 43: Recess 44: Flat surface 50: First member 51: First flat plate portion 51a: First bolt hole 51b: recessed portion 52: first recessed portion 53: protruding portion 60: Second member 61: Second flat plate portion 61a: Second bolt hole 61b: recessed portion 62: second recessed portion 63: protruding portion 70: Pile member 71: Head 71a: First elongated hole 71b: Second long hole 71c: Protrusion 72: Pile body A1: Temporary scaffolding A11: Support A12: Cross member A2: Construction equipment P1: Pile member G1: Ground E1: Top end E2: Top end R1: Inner radius (of top end E1) R2: Inner radius (of upper end E2) R3: Radius (of spherical portion 42)

Claims

1. A foundation of a temporary scaffold that is fixed to the ground by pile members while supporting supports extending in the vertical direction, a shaft member attached to the lower end of the support rod and having a spherical portion on its lower side; a first member having a first flat plate portion installed in a direction along the ground, and a spherical first recess portion protruding upward from the first flat plate portion and covering the spherical surface portion from one side in a left-right direction perpendicular to the up-down direction; a second member including a second flat plate portion installed in a direction along the ground, and a spherical second recess portion protruding upward from the second flat plate portion and covering the spherical surface portion from the other side in the left-right direction; Equipped with In a clamped state in which the spherical surface portion is clamped in the left-right direction by the first recessed portion and the second recessed portion, the first flat plate portion and the second flat plate portion are fixed to the ground by the stake member. Temporary scaffolding foundation.

2. The first flat plate portion has a first pile hole into which the pile member is inserted, The second flat plate portion has a second pile hole into which the pile member is inserted, In the clamped state, the first flat plate portion overlaps the upper side of the second flat plate portion, and the first stake hole communicates with the second stake hole. A temporary scaffolding foundation according to claim 1.

3. The first member further includes a protrusion that protrudes from an edge of the first flat plate portion toward the ground and covers a side surface of the second flat plate portion in the clamped state. A temporary scaffolding foundation according to claim 2.

4. The second member further includes a spike protruding toward the ground from a lower surface of the second flat plate portion facing the ground. A foundation for temporary scaffolding according to claim 2 or claim 3.

5. The pile member includes a pile body to be driven into the ground and a flat head provided at an upper end of the pile body, The head portion is formed with a first elongated hole and a second elongated hole that are aligned in the left-right direction and are each long in the left-right direction, a first bolt hole communicating with the first elongated hole in the clamped state is formed in the first flat plate portion; a second bolt hole communicating with the second elongated hole in the clamped state is formed in the second flat plate portion; In the clamped state, the first flat plate portion is fixed to the head by inserting a first bolt into the first bolt hole and the first elongated hole, and the second flat plate portion is fixed to the head by inserting a second bolt into the second bolt hole and the second elongated hole. A temporary scaffolding foundation according to claim 1.

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