JP2019128034A - Work bench and construction method using the same - Google Patents

Abstract

To enable a work for making unit formation of a ceiling hanging item and a work for fixing the unified ceiling hanging item to a ceiling structure to be carried out at a construction site as a series of steps.SOLUTION: This invention relates to a work bench 1 that is used when a ceiling hanging-down unit having a ceiling hanging-down item is fixed to a ceiling structure in respect to a ceiling hanging frame constituted by assembling several frames. The work bench has four support rods 2 vertically set at four corners of the work bench 1 from a floor surface, support parts 3 arranged at each of upper ends of the four support rods 2 to support a ceiling hanging frame 20 and connector members 4 for connecting positions near the lower ends of the four support rods 2 to each other. The connector members form a space into which a fork part of a lift device can be inserted between it and the floor surface. When the ceiling hanging frame 20 is installed at the support parts 3, the work bench 1 may form a work space for use in fixing the ceiling hanging item below the ceiling hanging frame 20 except the four support rods 2.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a technique for attaching and fixing a ceiling suspended object such as an air conditioner or various pipes to a ceiling structure such as a ceiling slab.

  Conventionally, there is a method of using a three-dimensional mount which can accommodate an air conditioner inside as one of methods of constructing a ceiling hanging type air conditioner (for example, patent document 1). In this conventional method, the step of assembling a plurality of frame members to create a gantry, and the step of attaching an air conditioner and various pipes to the gantry to form a unit are performed at a factory other than the construction site. The plurality of mounts unitized in the factory are transported from the factory to the construction site while being loaded on a pallet. At the construction site, an operation of fixing the unitized base to the suspension bolts suspended from the ceiling slab is performed.

JP 2010-249401 A

  However, in the conventional construction method, the air conditioner and various pipes are assembled into a unit by attaching to the gantry at the factory, so the air conditioner and various pipes to be installed at the construction site are once transported to the factory. Transport efficiency is poor and transport costs increase. In addition, the unitized frame has a three-dimensional frame structure to prevent damage to the air conditioner inside, and the number of pallets that can be loaded on the pallet is small, so transportation from the factory to the construction site This is a factor that significantly reduces the efficiency.

  In order to suppress such a decrease in transfer efficiency, it is preferable to carry in the unit work on the construction site by individually carrying the ceiling suspended object such as an air conditioner and various pipes and the mount to the construction site. . However, in this case, the work of assembling the ceiling suspension on the gantry and unitizing it must be performed separately from the work of fixing the unitized gantry to the suspension bolt, etc. There is a problem that is bad.

  In particular, when the work of assembling a ceiling suspended object to the gantry to form a unit is performed on the floor surface, the worker must work in a crouched posture, and work efficiency is significantly reduced. Moreover, when raising the united stand to the position of the suspension bolt which hangs down from a ceiling slab, it is necessary to mount the stand which the ceiling suspension thing was assembled | assembled on an elevator. However, the frame on which the suspended ceiling is assembled is quite heavy. Therefore, cooperation of many workers is required when mounting a gantry on which a suspended ceiling is assembled on an elevator, and the working efficiency is also lowered in this respect.

  Therefore, the present invention has been made to solve the above problems, and a series of operations of unitizing a ceiling suspension at a construction site and operations of attaching the unitized ceiling suspension to a ceiling structure It is an object of the present invention to provide a work table and a construction method using the work table that can be performed as a process, and work efficiency at a construction site can be remarkably improved as compared with the prior art.

  In order to achieve the above object, firstly, the present invention provides a ceiling suspension unit in which a ceiling suspension is attached to a ceiling structure that is constructed by assembling a plurality of frame members. A work table used for the four columns that are erected from the floor surface at the four corners of the work table and provided at the upper end portions of the four columns, respectively, to support the ceiling suspension frame A supporting portion and a connecting member for mutually connecting positions in the vicinity of lower ends of the four columns, wherein the four columns are excluded when the supporting portion supports the ceiling suspension frame; A work space for attaching the ceiling hanging object is formed below the ceiling suspension frame.

  Second, according to the present invention, in the work bench having the first configuration, the support portion includes a support surface provided at an upper end of the support, and a rod-like body protruding upward from a part of the support surface. And the support surface supports the lower surface of the frame material in a state where the rod-shaped body is inserted into a hole or slit provided on the lower surface of the frame material.

  Thirdly, the present invention is a construction method for fixing, to a ceiling structure, a ceiling suspension unit in which a ceiling suspension object is attached to a ceiling suspension frame configured by assembling a plurality of frame members, Installing the work platform having the first or second configuration at a lower position of the ceiling structure; installing the ceiling suspension frame on the support portion of the work platform; and the work platform Mounting the ceiling suspension unit in a state supported by the support portion by attaching the ceiling suspension to the ceiling suspension frame supported by the support portion; and a fork of a lift device Is operated below the connecting member to operate the lifting device, thereby lifting the work platform in a state of supporting the ceiling suspension unit to lift the ceiling suspension unit. Raising the ceiling unit to a position near the ceiling structure or the ceiling structure, fixing the ceiling suspension unit lifted to a position near the ceiling structure by the lift device to the ceiling structure, and hanging the ceiling And a step of lowering only the work table by operating the lift device after the lowering unit is fixed to the ceiling structure.

  By using the work bench of the present invention, the work of unitizing the ceiling suspension at the construction site and the operation of fixing the unitized ceiling suspension to the ceiling structure can be performed as a series of operations. Thus, the work efficiency at the construction site can be remarkably improved as compared with the conventional case.

It is a perspective view which shows one structural example of a work table. It is a side view which shows the state which installed the work bench on the floor surface. It is a figure which shows the workbench of the state which installed the hanging frame body. It is a figure which shows the structural example of the frame material which comprises a ceiling suspension frame. It is a perspective view which shows the state which attached the ceiling suspension thing to the ceiling suspension frame body, and comprised the ceiling suspension unit. It is a side view of a work bench in the state where a ceiling suspension unit was supported. It is a figure which shows the state which lifted up the work table of the state which supported the ceiling suspension unit using the lift apparatus a little. It is a figure which shows the state which raised the ceiling suspension unit to the position near the ceiling structure. It is a figure showing the state where only a workbench is lowered using a lift device. It is a figure which shows the example which raises a worktable using the raising / lowering apparatus different from a lifting apparatus. It is a figure which shows one structural example of a three-dimensional ceiling suspension frame body. It is a figure which shows an example of the state which installed the three-dimensional ceiling suspension frame in the upper end part of a work bench. It is a figure which shows the other example of the state which installed the three-dimensional ceiling suspension frame in the upper end part of a work bench. It is a figure which shows the construction example which lifts a ceiling suspension unit using a long volt | bolt as a guide. It is a figure which shows the construction example which lifts a ceiling suspension unit using a long volt | bolt as a guide. It is a figure which shows the modification of a support part.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each drawing referred to below, the same code | symbol is attached | subjected to the mutually common member, and the overlapping description about them is abbreviate | omitted.

  FIG. 1 is a perspective view showing a configuration example of a work table 1 according to an embodiment of the present invention. FIG. 2 is a side view showing a state in which the work table 1 is installed on the floor surface 7. The work table 1 is assembled by assembling ceiling suspension objects such as air conditioners and various pipes with one another, and fixing the unitized ceiling suspension objects to a ceiling structure such as a ceiling slab. It is a workbench that can be done as a series of processes. If it demonstrates in more detail, the work bench 1 will carry out the operation | work which a worker assembles | assembles a ceiling suspension thing with respect to the ceiling suspension frame 20, and unitizes by supporting the ceiling suspension frame 20 mentioned later at the upper end part. After the ceiling hanging object is united, the ceiling hanging object united at the upper end portion is left as it is in the vicinity of the ceiling structure by using the lift device 10 shown in FIG. It is possible to raise it up to the construction.

  The work table 1 is provided with four columns 2 consisting of columns 2a, 2b, 2c and 2d erected from the floor surface 7. These four support columns 2 are arranged at the four corners of the work table 1 and are erected vertically from the floor surface 7. Although the case where the support | pillar 2 is cylindrical shape is illustrated in the example of a figure, it is not restricted to this, A prismatic shape may be sufficient. Moreover, the four support | pillars 2 are unified by the height of about 1.2-1.8 m from the floor surface 7, for example. Therefore, the upper end portion of the support 2 is approximately at the same height as the eye gaze height of the worker.

  A support portion 3 for supporting the ceiling suspension frame 20 is formed at the upper end portion of each of the four columns 2. The support portion 3 is, as partially enlarged in FIG. 1, a support surface 3a provided on the upper end of the support 2 and a rod-like body projecting upward from a part of the support surface 3a (center position in FIG. 1). 3b. The support portions 3 provided at the upper ends of the four columns 2 are all at the same height position.

  Further, a connecting member 4 for connecting the columns 2a, 2b, 2c, and 2d to each other is provided in the vicinity of the lower ends of the four columns 2. The connecting member 4 is formed of, for example, a flat plate member 4a, and the support columns 2 are fixed to the four corners of the flat plate member 4a. The connecting member 4 holds the predetermined height positions of the columns 2a, 2b, 2c and 2d in a vertical state, and the relative positional relationship between the columns 2a, 2b, 2c and 2d does not change. The columns 2a, 2b, 2c and 2d are fixed.

  The connecting member 4 may have a configuration in which the columns 2a, 2b, 2c, and 2d can be attached and detached. If each column 2a, 2b, 2c, 2d is detachable from the connecting member 4, it can be transported to the construction site with each column 2a, 2b, 2c, 2d removed from the connecting member 4. There is an advantage that it is easy to carry. And after conveying to a construction site, the worktable 1 can be created at a construction site by attaching each support | pillar 2a, 2b, 2c, 2d to the connection member 4. FIG.

  The connecting member 4 is fixed at a predetermined height from the lower end of each column 2 and is in a state parallel to the floor surface 7. Therefore, as shown in FIG. 2, the connecting member 4 forms a space with a constant interval between the connecting member 4 and the floor surface 7. A space between the connecting member 4 and the floor surface 7 is a space for inserting the fork portion 14 of the lift device 10.

  The lift device 10 shown in FIG. 2 is a device that can move the fork portion 14 up and down by manual operation, for example. The lift device 10 includes a base 11 to which wheels 12 are attached, a lift guide 13 erected vertically from the base 11, a fork portion 14 movable up and down along the lift guide 13, and a fork The wire 15 for moving the portion 14 up and down, the rotary handle 16 for manually winding and unwinding the wire 15, and a grip for the operator when moving the lift device 10 along the floor 7 The operation handle 17 is provided. Such a lift device 10 can raise the fork portion 14 by turning the rotary handle 16 in a predetermined direction, and can turn the fork portion 14 by turning the rotary handle 16 in a direction different from the predetermined direction. Can be lowered. In addition, the wheel 12 is preferably equipped with a lock function.

  Next, a construction procedure for attaching a suspended object such as an air conditioner and various pipings to a ceiling structure such as a ceiling slab by using the workbench 1 and the lift device 10 will be described.

  First, as a first step, the worker installs the work table 1 at a position below a ceiling structure such as a ceiling slab to be constructed.

  Next, the worker installs the ceiling suspension frame 20 on the upper end portions of the four columns 2 of the work bench 1 as a second step. FIG. 3 is a diagram illustrating the work table 1 in a state where the ceiling frame 20 is installed. As shown in FIG. 3, the ceiling suspension frame 20 is a frame configured by assembling a plurality of frame members 21. In FIG. 3, the ceiling suspension frame 20 configured in a rectangular shape in plan view is illustrated by assembling six frame members 21 a, 21 b, 21 c, 21 d, 21 e and 21 f. However, the number of frame members 21 used for the ceiling suspension frame 20 is not limited to this. Moreover, in FIG. 3, although the ceiling suspension frame 20 of a planar structure is illustrated, the ceiling suspension frame 20 is not restricted to a planar thing, You may be a three-dimensional structure. That is, how the plurality of frame members 21 are assembled in the ceiling suspension frame 20 is determined in advance according to the arrangement and installation environment of ceiling suspended objects such as air conditioners and various pipes.

  FIG. 4 is a view showing a configuration example of the frame member 21 constituting the ceiling suspension frame 20. As shown in FIG. As shown in FIG. 4 (a), the frame members 21 are connected in such a manner that flat portions of a pair of shaped steels 22, 23 such as lip grooved steel or light grooved steel are opposed to each other at a predetermined distance. is there. Specifically, as shown in FIG. 4 (b), holes 22a, 22b, 23a, 23b for inserting the bolts 26 are provided at both ends of a pair of shaped steels 22, 23 having the same length. The bolt 26 is inserted through the holes 22a, 22b, 23a, 23b, and the nut 27 is fastened to the tip end of the bolt 26, whereby the pair of shaped steels 22, 23 are connected. At this time, the cylindrical spacer 25 is inserted into the shaft portion of the bolt 26 between the shaped steels 22 and 23 to form slits 24 with a predetermined interval between the shaped steels 22 and 23. The distance between the slits 24 is a distance through which the rod-like members 3 b provided in the support portion 3 of the support 2, a suspension bolt depending from the ceiling structure, a support bolt described later, and the like can be inserted. Accordingly, each frame member 21 can be attached by inserting the rod 3b, a suspension bolt, a support bolt, or the like at an arbitrary position of the slit 24 extending from one end to the other end. The interval between the slits 24 is smaller than the outer diameter dimension of the support surface 3 a formed on the support portion 3 of the support column 2. For example, by making the thickness of the support 2 larger than the distance between the slits 24, the outer diameter of the support surface 3a can be made larger than the distance between the slits 24.

  Therefore, if the rod-shaped body 3b provided on the support portion 3 of the support column 2 is inserted into the slit 24 of the frame material 21 constituting the ceiling frame 20, the support surface 3a supports the lower surface of the frame material 21. . As a result, as shown in FIG. 3, the ceiling frame 20 is supported by the upper end portion of the work table 1. The rod-like body 3 b of the support portion 3 is engaged with the inner wall of the slit 24, so that the ceiling suspension frame 20 is supported by the support portion 3 without being detached from the support portions 3 of the respective columns 2. In this manner, the ceiling suspension frame 20 supported by the upper end portion of the work table 1 stably holds a substantially horizontal posture at a height position substantially the same as the eye height position of the worker.

  In addition, it is preferable that the operation | work which assembles | assembles a pair of shape steels 22 and 23 and produces the frame material 21 is beforehand performed in a factory etc. And, by using a method of carrying in a plurality of frame members 21 as an assembly kit from a factory to a construction site, it is not necessary to perform the work of creating the frame members 21 at the construction site, and transfer efficiency from the factory to the construction site is increased. Will be able to

  When the ceiling suspension frame 20 is installed on the upper end portions of the four columns 2 as shown in FIG. 3, the ceiling suspension frame 20 prepared in advance at the construction site is You may make it mount in a part. However, the present invention is not limited to this, and the work of assembling the plurality of frame members 21 to complete the ceiling suspension frame 20 may be performed at the upper end portion of the column 2. In this case, since the worker can perform the tightening work of the bolt 26 at the height position substantially the same as the height of the sight line, it is easy to work and it is possible to complete the ceiling suspension frame 20 easily and safely. Excellent work efficiency.

  Further, as shown in FIG. 3, when the ceiling suspension frame 20 is supported by the support portions 3 of the four columns 2, the workbench 1 except for the portion where the four columns 2 are disposed, the ceiling suspension frame It forms a working space open under the body 20. Therefore, the worker can carry out work by entering and exiting the work space below the ceiling support frame 20 in the same posture from any direction of the four side surfaces of the work bench 1. At this time, since the worker can get on the connecting member 4 to perform work, the connecting member 4 functions as a floor at the time of work. Therefore, it is also possible to carry in a temporary suspended object such as an air conditioner to the work space below the ceiling suspension frame 20 and temporarily place it, and work efficiency is improved.

  When the ceiling frame 20 is installed at the upper end of the work table 1, the worker then attaches a ceiling suspended object such as an air conditioner or various pipes to the ceiling frame 20 as a third step. . FIG. 5 is a perspective view showing a state in which the ceiling suspension unit 30 is configured by attaching a ceiling suspension to the ceiling frame 20. FIG. 6 is a side view of the work table 1 in a state where the ceiling suspension unit 30 is supported. For example, the operator attaches four support bolts 35 to predetermined positions of the frame members 21 constituting the ceiling frame 20 and suspends the four support bolts 35 from the ceiling frame 20. Put in a state. The operator attaches the four corners of the air conditioner 31 to the lower ends of the four support bolts 35. Thereby, the air conditioner 31 will be in the state suspended by the ceiling suspension frame 20. As shown in FIG. Further, the worker attaches the suspension bands 36 at predetermined positions of the frame members 21 constituting the ceiling suspension frame 20, and suspends the plurality of suspension bands 36 from the ceiling suspension frame 20. Then, the worker attaches the drain pipe 32 and the refrigerant pipe 33 to the suspension band 36. As a result, the drain pipe 32 and the refrigerant pipe 33 are suspended from the ceiling frame 20.

  Thus, when the ceiling suspension object such as the air conditioner 31, the drain pipe 32, and the refrigerant pipe 33 is attached to the ceiling suspension frame body 20, the ceiling in which the ceiling suspension object and the ceiling suspension frame body 20 are unitized A suspension unit 30 is configured. As a result, the workbench 1 is in a state of supporting the ceiling suspension unit 30 at the upper end portion of each column 2. Thus, when attaching a suspended ceiling to the ceiling frame 20, the operator can work at a height position substantially the same as the line of sight while standing, so that the work is easy. Work can proceed safely and efficiently. In addition, the operator can enter the work table 1 and perform work by placing the work on the flat plate member 4 a provided as the connecting member 4. Therefore, when attaching the ceiling hanging object to the ceiling suspension frame 20, the worker can perform a bolt tightening operation etc. in front of his eyes, which is excellent in work efficiency.

  When the ceiling suspension unit 30 is supported at the upper end portion of the work table 1, the worker then performs the work of the fourth step. FIG. 7 is a diagram showing a fourth step. As shown in FIG. 7, in the fourth step, the worker lifts the work bench 1 while supporting the ceiling suspension unit 30 using the two lift devices 10. It is preferable that this work be performed simultaneously by two workers. That is, the operator inserts the fork portions 14 of the two lift devices 10 into the lower space of the connecting member 4 from the opposite sides of the work table 1 and turns the rotary handle 16 in a predetermined direction to move the fork portion 14. Raise it. Accordingly, the work table 1 is lifted with the fork portion 14 supporting the lower surface of the connecting member 4.

  When the work table 1 is lifted from the floor surface 7, the operator holds the operation handle 17 of the lift device 10 and pushes or pulls the lift device 10 to support the ceiling suspension unit 30. The workbench 1 can be moved on the floor 7. Therefore, as shown in FIG. 7, the worker can move the workbench 1 to a position immediately below the ceiling structure in a state in which the suspension bolts 9 hang down from the ceiling slab 8.

  When the work table 1 is moved to a position directly below the ceiling structure where the ceiling suspension unit 30 is installed, the operator further turns the fork portion 14 by turning the rotary handle 16 of the lift device 10 in a predetermined direction. Raise and lift the workbench 1. Thereby, the ceiling suspension unit 30 can be raised to the ceiling structure or a position near the ceiling structure.

  FIG. 8 is a diagram illustrating a state where the ceiling suspension unit 30 is raised to a position near the ceiling structure. As shown in FIG. 8, when raising the ceiling suspension unit 30 to a position near the ceiling structure, for example, a worker different from the worker who operates the lift device 10 rides on a lifting work table or the like at a position near the ceiling structure It is preferable to wait. When the ceiling suspension unit 30 ascends due to the operation of the lift device 10, the worker who performs work at a high place can use the suspension bolts 9 hanging from the ceiling slab 8 as the frame members 21 of the ceiling suspension frame 20. It guides to the operator who is operating the lift apparatus 10 so that it may be inserted in the slit 24 provided. Thus, the worker operating the lift device 10 can lift the ceiling suspension unit 30 while finely adjusting the position of the lift device 10 based on an instruction from the worker performing work at a high place. Yes, the suspension bolt 9 can be inserted into the slit 24 of the frame member 21 as the ceiling suspension unit 30 is raised. When the ceiling suspension unit 30 is lifted to a predetermined height position with the suspension bolt 9 inserted into the slit 24, the operator who operates the lift device 10 stops the operation of the rotary handle 16. Thus, the ceiling suspension unit 30 is temporarily installed on the ceiling structure.

  Next, the worker performs the work of the fifth step. That is, a worker who performs work at a high place performs a work of fixing the ceiling suspension unit 30 to the ceiling structure by inserting and fastening a nut to the suspension bolt 9. As a result, the ceiling suspension unit 30 is supported by the suspension bolts 9 hanging from the ceiling slab 8 and is fixed to the ceiling structure.

  Thereafter, as a sixth step, the operator turns the rotary handle 16 of the lift device 10 in the opposite direction to the previous direction to lower the fork portion 14. FIG. 9 is a diagram showing a sixth step. When the fork part 14 of the lift device 10 is lowered, the work table 1 is lowered together with the fork part 14. At this time, the rod-shaped body 3b inserted into the slit 24 of the frame material 21 at the upper end portion of the work table 1 is pulled out from the slit 24, and the engagement state with the ceiling frame 20 is released. Therefore, the lift device 10 is lowered with only the work table 1 supported. Then, when the workbench 1 returns to the state of being placed on the floor 7, a series of construction procedures are completed. In the case of installing the ceiling suspension unit 30 at a plurality of locations of the ceiling structure, the above-described steps may be repeated.

  As described above, if the workbench 1 of the present embodiment is used, the work of assembling ceiling suspension objects such as an air conditioner and various pipings mutually into a unit and a ceiling slab that is a unitized ceiling suspension are assembled The work of fixing to the ceiling structure such as can be performed as a series of processes. Therefore, if construction is performed using the workbench 1 of the present embodiment, there is an advantage that work efficiency is remarkably improved as compared with the conventional construction method.

  By the way, in the above, the case where the work bench | platform 1 of the state which supported the ceiling suspension unit 30 was raised to the ceiling structure or the near position of a ceiling structure using only the lift apparatus 10 was illustrated. However, the present invention is not limited to this, and the work table 1 in a state where the ceiling suspension unit 30 is supported is lifted to a ceiling structure or a position near the ceiling structure by using a lifting device 19 different from the lifting device 10. It is good.

  FIG. 10 is a diagram illustrating an example in which the work table 1 is raised using a lifting device 19 different from the lifting device 10. For example, when the ceiling suspension unit 30 can not be lifted to a predetermined installation position even if the lift device 10 raises the fork portion 14 to the maximum height, a method as shown in FIG. 10 is employed. The lift device 10 lifts the workbench 1 in a state of supporting the ceiling suspension unit 30 to a predetermined height position, and forms a space in which the lift device 19 can be introduced below the connection member 4. When a space into which the lifting device 19 can be introduced is formed below the connecting member 4, the operator then installs the lifting device 19 in the space formed below the connecting member 4. Then, the worker drives the lifting device 19. The lifting device 19 includes, for example, a hydraulic lifting mechanism, and can lift its upper end to a height position of about 5 m. Therefore, when the lifting device 19 is driven, the work table 1 can be raised in a state where the lifting device 19 supports the lower surface of the connecting member 4 as shown in FIG. Thereby, even when the height to the ceiling structure is relatively high, the ceiling suspension unit 30 can be raised to the ceiling structure or a position near the ceiling structure.

  Next, the case where the ceiling frame is formed into a three-dimensional structure will be described. FIG. 11 is a diagram illustrating a configuration example of the three-dimensional ceiling suspension frame 40. A ceiling suspension frame 40 shown in FIG. 11 includes a lower frame 40a and an upper frame 40b. The lower frame body 40a has the same configuration as the ceiling suspension frame body 20 described in the above embodiment. On the other hand, the upper frame 40b is a frame attached to the upper part of the lower frame 40a. In the example shown in FIG. 11, the case where the two upper frame bodies 40b formed in the gate shape are attached to the upper part of the lower frame body 40a is illustrated. The upper frame 40b is, for example, a gate-shaped frame by assembling two vertical frame members 51 arranged in the vertical direction in a state where they are erected in the vicinity of both ends of the horizontal frame members 52 arranged in the horizontal direction. Configured as a structure. However, the upper frame body 40b is not necessarily limited to the gate-shaped frame structure. For example, the upper frame 40b may have a table-like frame structure in which four horizontal frame members 52 are assembled in a rectangular shape in one plane and the vertical frame members 51 are erected from each of the four corners. Further, by assembling the vertical frame members 51 and the horizontal frame members 52, a frame structure having another shape may be adopted.

  The vertical frame member 51 is made of, for example, one square steel pipe having a predetermined length, and L-shaped angle members 53 are attached to the upper and lower ends thereof. On the other hand, the horizontal frame member 52 has a structure in which two rectangular steel pipes thinner than the vertical frame member 51 are arranged in parallel at a predetermined interval, and both ends thereof are fixed by fixing means such as bolts and nuts. . Therefore, slits at predetermined intervals are formed at the center of the lateral frame members 52 along the longitudinal direction. The interval between the slits is substantially equal to the interval between the slits 24 provided in the frame material 21 described above. Therefore, it is possible to insert a bolt having the same diameter as a suspension bolt or a support bolt into the slit of the horizontal frame member 52.

  The vertical frame member 51 is erected to a predetermined position in the longitudinal direction of the horizontal frame member 52 by fixing the flat plate portion of the L-shaped angle member 53 provided at the lower end to the horizontal frame member 52 with a bolt or the like. It is attached to the state. That is, the interval between the two vertical frame members 51 can be adjusted as appropriate by changing the attachment position with respect to the horizontal frame member 52.

  The upper frame body 40b configured as described above can be attached to the lower frame body 40a as shown in FIG. That is, bolts are inserted through both the slit formed in the horizontal frame member 52 of the upper frame body 40b and the slit 24 formed in the frame member 21 of the lower frame body 40a to clamp the nut. The upper frame 40b can be fixed to the lower frame 40a. At this time, the position of the upper frame body 40 b can be adjusted as appropriate along the slits 24 formed in the frame material 21.

  As for the ceiling suspension frame 40 comprised as mentioned above, the upper frame 40b is fixed with respect to a ceiling structure. That is, the suspension bolt 9 is inserted into the hole 54 provided in the flat plate portion of the L-shaped angle member 53 provided at the upper end of the upper frame 40b, and the nut is fastened to the suspension bolt 9, The upper frame body 40b is fixed to the ceiling structure. The upper frame body 40 b supports the lower frame body 40 a at a height position corresponding to the length of the vertical frame material 51.

  Thus, the upper frame 40b supports the lower frame 40a at a position lower than the ceiling slab, thereby exhibiting excellent earthquake resistance. That is, since the vertical frame member 51 of the upper frame 40b is formed of a square steel pipe and is thicker and more rigid than the suspension bolt 9 hanging down from the ceiling structure, the lower frame 40a is stabilized at a predetermined height position. It can be supported.

  FIG. 12 is a view showing a state in which the ceiling suspension frame 40 is installed at the upper end portion of the work table 1. As shown in FIG. 12, the worker installs the ceiling frame 40 at the upper end of the work table 1. And a worker attaches a ceiling suspension thing with respect to the ceiling suspension frame body 40, with the state which the work bench | platform 1 supported the ceiling suspension frame body 40, and creates the ceiling suspension unit 30. Thereafter, the ceiling suspension unit 30 can be fixed to the ceiling structure by proceeding with the same process as described above.

  FIG. 13 is a view showing a state in which a three-dimensional ceiling frame 50 different from the above is installed at the upper end portion of the work bench 1. The ceiling frame 50 also has an upper frame 50a and a lower frame 50b. The upper frame 50a has the same configuration as the ceiling suspension frame 20 described in the above embodiment. On the other hand, the lower frame 50b is a frame attached to the lower part of the upper frame 50a. The lower frame 50 b has a vertical frame member 62 and a horizontal frame member 61 in the same manner as described above. The horizontal frame member 61 is assembled in, for example, a quadrangular shape to form a flat rectangular frame, and support bolts 35 that support the four corners of the air conditioner 31 are attached. The vertical frame member 62 is for supporting a rectangular frame constituted by the horizontal frame member 61 at a predetermined height position below the upper frame 50a, and is constituted by, for example, a square steel pipe.

  The worker installs such a ceiling suspension frame 50 at the upper end portion of the work table 1 and suspends the ceiling relative to the ceiling suspension frame 50 while the operation table 1 supports the ceiling suspension frame 50. Mount the object and create a ceiling suspension unit 30. Thereafter, the ceiling suspension unit 30 can be fixed to the ceiling structure by proceeding with the same process as described above.

  Next, a construction method that uses a long bolt as a guide when the ceiling suspension unit 30 in which the ceiling suspension object and the ceiling suspension frame 20 are unitized is raised to a position near the ceiling structure will be described. For example, as shown in FIGS. 7 and 8, when the ceiling suspension unit 30 is raised to a position near the ceiling structure using the lift device 10, the position of the slit 24 of the frame material 21 is changed to the position of the suspension bolt 9. Fine adjustment is necessary to meet the above, and the fine adjustment may take time. On the other hand, if the long bolt is installed in a suspended state from the ceiling slab 8 in advance and the long bolt is used as a guide, the ceiling suspension unit 30 is slightly moved up to a position near the ceiling structure. The position of the slit 24 of the frame material 21 can be adapted to the position of the suspension bolt 9 without adjustment.

  FIGS. 14 and 15 are diagrams showing a construction example for lifting the ceiling suspension unit 30 using the long bolt 6 as a guide. First, as shown in FIG. 14, the long bolt 6 is installed in advance in the vicinity of the suspension bolt 9 installed on the ceiling slab 8. For example, when a pair of suspension bolts 9 are inserted into the same slit 24 at positions near both ends of one frame member 21, the long bolt 6 is installed at a position near each of the pair of suspension bolts 9. At this time, the long bolt 6 is installed on a straight line connecting the pair of suspension bolts 9.

  As shown in FIG. 14, when the work table 1 that supports the ceiling suspension unit 30 is slightly lifted by the lift device 10, the lower end of the long bolt 6 is positioned in the vicinity of the frame material 21 of the ceiling suspension frame 20. Do. The operator inserts the lower end of the long bolt 6 into the slit 24 of the frame member 21 when the work stand 1 supporting the ceiling suspension unit 30 is further raised by turning the rotation handle 16 of the lift device 10 in a predetermined direction. . Thereafter, when the operator raises the work table 1 that supports the ceiling suspension unit 30 by further rotating the rotary handle 16 of the lift device 10 in a predetermined direction, the long bolt 6 serves as a guide to suspend the ceiling. The lowering unit 30 can be guided to a position near the suspension bolt 9.

  Then, as shown in FIG. 15, when the ceiling suspension unit 30 is raised to a position near the ceiling slab 8, the suspension bolt 9 is inserted into the slit 24 of the frame material 21. That is, since the long bolt 6 is installed in the vicinity of the pair of suspension bolts 9, the operator operates the lift device 10 to raise the work table 1 that supports the ceiling suspension unit 30. The suspension bolt 9 can be smoothly inserted into the slit 24 of the frame member 21. Therefore, it is not necessary for the operator who operates the lift device 10 to finely adjust the position of the lift device 10 based on the instruction of another worker who performs work at a high place, so that the work efficiency is further improved.

  Thereafter, an operator who performs work at a high place performs an operation of fixing the ceiling suspension unit 30 to the ceiling structure by inserting a nut into the tip of the suspension bolt 9 inserted into the slit 24 of the frame member 21 and fastening it. At the same time, the long bolt 6 is removed from the ceiling slab 8. If it is difficult to remove the long bolt 6 from the ceiling slab 8, the long bolt 6 may be cut.

  In this manner, the long bolt 6 is previously installed in the vicinity of the pair of suspension bolts 9 and the ceiling suspension unit 30 is raised by using the long bolt 6 as a guide. The work of inserting the tip into the slit 24 of the frame material 21 can be easily performed, and there is an advantage that the work efficiency can be further improved.

  In addition, since what can be utilized as such a guide should just be a rod-shaped body, it is not necessarily restricted to a bolt-shaped thing. Moreover, the ceiling suspension unit 30 which can utilize such a guide is not restricted to what is comprised by the ceiling suspension frame 20, as shown to FIG.14 and FIG.15, The three-dimensional ceiling suspension frame 40 mentioned above , 50 may be used. Two or more such guides may be used, or only one guide may be used.

  14 and 15 show an example in which the long bolt 6 is installed separately from the suspension bolt 9, the above-described guide long bolt 6 may also be used as the suspension bolt 9. That is, the long bolt 6 is installed in advance at the position where the suspension bolt 9 of the ceiling slab 8 is installed. In this case, the operator operates the lift device 10 in a state where the lower end of the long bolt 6 is inserted into the slit 24 of the frame member 21 so that the work bench 1 supporting the ceiling suspension unit 30 is in the vicinity of the ceiling slab 8 Raise to position. And if the worker who works at high places inserts a nut with respect to the long volt | bolt 6 and fastens it, if the long volt | bolt 6 is cut | disconnected, the long volt | bolt 6 will exhibit the function similar to the suspension bolt 9. FIG. Note that an operator who performs work at a high place may cut the long bolt 6 and then insert a nut into the tip of the long bolt 6 and tighten it.

  Although one embodiment related to the present invention has been described above, the present invention is not limited to that described in the above embodiment. That is, the present invention can be applied to various modifications other than the configuration described in the above embodiment.

  For example, in the said embodiment, the air conditioner 31, the drain piping 32, and the refrigerant piping 33 were mentioned as an example as a ceiling suspension thing. However, the ceiling hanging object assembled to the ceiling suspension unit 30 is not necessarily limited to the above. For example, the ceiling suspension unit 30 may be one in which a ventilation duct, a cable pipe, a luminaire, and the like are assembled.

  Moreover, in the said embodiment, the slit 24 was formed in the flame | frame material 21, and the case where the rod-shaped body 3b which protrudes upwards in the support part 3 of the work bench 1 was inserted in the slit 24 was illustrated. However, the present invention is not limited to this, and a hole such as a round hole or a long hole is formed in the frame material 21. By inserting the rod-shaped body 3b into the hole, the support portion 3 can be attached to the ceiling frame 20, 40, 50 may be supported.

  Moreover, in the said embodiment, the case where the support part 3 provided in the upper end part of the worktable 1 was the structure which stood the rod-shaped body 3b from a part of support surface 3a was illustrated. However, it is not limited to this. FIG. 16 is a view showing a modification of the support portion 3. The support portion 3 may be provided with a flat plate portion 3c and a pair of wall portions 3d in which both end portions of the flat plate portion 3c are erected as shown in a partially enlarged view in FIG. In this case, the pair of wall portions 3d are installed at the same interval as the width dimension of the frame member 21 or at a slightly wider interval. Moreover, it is preferable that the support part 3 is a structure which can be rotated around the central axis of the support | pillar 2. Such a support part 3 accommodates the frame material 21 between the pair of wall parts 3d when the ceiling suspension frame 20, 40, 50 is installed at the upper end part of the work table 1. As a result, the flat plate portion 3 c supports the lower surface of the frame member 21 and the pair of wall portions 3 d holds the side surface of the frame member 21. It is supported without falling from the upper end. In addition, after the workbench 1 is raised and the ceiling suspension unit 30 is fixed to the ceiling structure, if the fork portion 14 of the lift device 10 is lowered, only the work bench 1 can be lowered.

  Moreover, in the said embodiment, the case where the lift apparatus 10 which lifts the worktable 1 was a manual operation type was illustrated. However, it is not restricted to this, The lift apparatus 10 may raise or lower the fork part 14 by an electric type or other methods.

  Moreover, in the said embodiment, when lifting the work bench | platform 1, the case where the two lift apparatuses 10 were used was illustrated. However, it is not limited to this. For example, the workbench 1 may be lifted using one forklift.

  DESCRIPTION OF SYMBOLS 1 ... Work bench, 2 ... post | mailbox, 3 ... support part, 4 ... connection member, 10 ... lift apparatus, 14 ... fork part, 20, 40, 50 ... ceiling suspension frame body 21, 51, 52, 61, 62 ... Frame material, 30: ceiling suspension unit, 31: air conditioner (ceiling suspension), 32: drain piping (ceiling suspension), 33: refrigerant piping (ceiling suspension).

Claims (3)

A workbench used to fix a ceiling suspension unit with a ceiling suspension attached to a ceiling suspension frame constructed by assembling a plurality of frame materials to a ceiling structure,
Four pillars standing from the floor surface at the four corners of the work bench,
A support portion that is provided at each upper end portion of the four support columns and supports the ceiling frame;
A connecting member for mutually connecting positions near lower ends of the four columns;
Have
When the support portion supports the ceiling suspension frame, a work space for attaching the ceiling suspended object is formed below the ceiling suspension frame except for the four columns. To work with.   The support portion has a support surface provided on the upper end of the support, and a rod-like body protruding upward from a part of the support surface, and the hole or slit is provided on the lower surface of the frame material. The work table according to claim 1, wherein the support surface supports a lower surface of the frame member in a state of being inserted into the work table. A construction method for fixing to a ceiling structure a ceiling suspension unit in which a ceiling suspension is attached to a ceiling suspension frame constructed by assembling a plurality of frame materials,
Installing the work bench according to claim 1 or 2 at a lower position of the ceiling structure;
Installing the ceiling frame on the support of the workbench;
Mounting the ceiling suspension unit in a state supported by the support portion by attaching the ceiling suspension to the ceiling suspension frame supported by the support portion of the work bench;
The fork portion of the lift device is inserted below the connection member to operate the lift device, thereby lifting the work platform in a state of supporting the ceiling suspension unit and setting the ceiling suspension unit to the ceiling structure or the ceiling Raising to a position near the ceiling structure;
Fixing the ceiling suspension unit lifted to a position near the ceiling structure by the lift device to the ceiling structure;
After the ceiling suspension unit is fixed to the ceiling structure, operating the lift device to lower only the workbench;
The construction method characterized by having.

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