Support leg height adjustment apparatus

Abstract

To provide a support leg height adjustment apparatus which can be easily operated and has high workability.SOLUTION: Disclosed is a support leg height adjustment apparatus 100 for adjusting the height of a support leg 200, which comprises: an operation part 1; a gripping part 2 connected with the operation part 1, having a fitting hole 21, gripping a support pedestal 203 by fitting the support pedestal 203 into the fitting hole 21 and being movable in a vertical direction; a driving part 5 for rotating the gripping part 2 with a rotation axis along the vertical direction as the center; and a laser light detection part 6 having a receiving part 61 for receiving laser light 501 applied from a laser oscillator 500 to a standard height position, detecting the incidence of the laser light 501 on the receiving part 61 and being movable in the vertical direction. During a height adjustment operation, the laser light detection part 6 and the gripping part 2 hold a prescribed distance, the laser light detection part 6 also moves with the movement of the gripping part 2, and the rotation of the gripping part 2 is stopped when the laser light detection part 6 detects the laser light 501 in a state where the gripping part 2 rotates during the height adjustment operation.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a support leg height adjustment device for adjusting the height of support legs used when constructing a double floor.

Background Art

[0002] A double floor is constructed by supporting a plurality of floor panels (floor board materials) formed of materials such as wood-based, metal-based, concrete-based, and calcium silicate-based on a foundation floor by support legs installed on the foundation floor at a certain height. Due to such a configuration, a space is formed between the foundation floor and the floor panel in the double floor, and various wirings and pipes such as electrical, communication, water supply and drainage pipes, and gas pipes can be passed through this space. Therefore, space can be saved, and construction of wirings and pipes is easy. Also, there is an effect that maintenance of wirings and pipes is easy. Further, there is an effect that renovation such as a floor plan change is easy.

[0003] Here, the support leg has a support base placed on the foundation floor, a support pedestal for supporting the floor panel, and a support column that connects the support base and the support pedestal and extends in the vertical direction. Also, the support pedestal is movable in the vertical direction. That is, the height position of the support pedestal can be adjusted, and the height of the support leg can be adjusted. Therefore, even when the foundation floor is not flat, for example, by adjusting the height of the support legs installed on the foundation floor (adjusting the height position of the support pedestal), the support pedestal can be arranged substantially flat. Therefore, a flat floor can be realized by a plurality of floor panels placed and supported on this support pedestal.

[0004] Here, the construction procedure of the double floor will be described below. First, layout is performed to determine the arrangement positions of a plurality of support legs on the base floor. By the layout, marks of the arrangement positions of the support legs are formed on the base floor, and using these marks as reference marks, the support legs are arranged on the base floor. Among the support legs arranged on the base floor, the height of the reference support leg is adjusted to a desired height. The adjustment of the height of the support leg is performed by moving the support pedestal up and down along the support column as described above to adjust the height position of the support pedestal. The adjustment of the height of the reference support leg is performed using a surveying level or the like, and the height of the support leg is adjusted for every approximately five support legs arranged side by side to make them reference support legs. In this way, a plurality of reference support legs are provided, a leveling rod having a flat surface is stretched between these reference support legs, and the height of the support legs installed between the reference support legs is adjusted to the height of this rod. Thereby, after adjusting the height of all the support legs arranged on the base floor, each support leg is adhered and fixed to the base floor. Thereafter, the double floor is constructed by installing a floor panel on the support pedestal of the support leg whose height has been adjusted.

[0005] In the construction of the double floor described above, when adjusting the height of the support leg, the operator adjusts the height position of the support pedestal while bending down and stooping. For this reason, the work is difficult, the burden on the operator is large, there is a high possibility of health damage such as low back pain, and there is also a problem that the work efficiency is low.

[0006] To solve such problems, for example, a device has been proposed that an operator operates to adjust the height of a support leg. For example, Patent Document 1 discloses a column height adjustment device (support leg height adjustment device) that adjusts the height positions of support legs, each of which is constituted by nuts (support pedestals) screwed onto a plurality of bolt columns (support columns) arranged on a base (support pedestal), to be on the same plane. This column height adjustment device includes a laser transmitter that irradiates laser light at a reference height level, and a height adjuster placed on the nut. The height adjuster includes a rotating shaft having an insertion hole that detachably engages with the nut, a motor that drives the rotating shaft, a height position detector that receives the laser light and detects a deviation from the reference height level, and a motor controller that controls the motor based on the output of the height position detector. In a state where the height adjuster is placed on the nut, its height position is adjusted along the reference height level.

[0007] According to the column height adjustment device disclosed in Patent Document 1 above, by placing a height adjuster on the support leg, which is a nut screwed onto each bolt column, one operator can automatically align the height positions of the nuts supporting the floor panel on the same plane without bending down.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0009] However, according to the support column height adjustment device disclosed in Patent Document 1, although an operator can work alone while standing upright without bending, the operator has to work while keeping the height adjustment mechanism maintained substantially vertically, making it hard to say that it can be easily operated. If the operator's operation is poor and the support column height adjustment mechanism works in a tilted state rather than vertically, the nut 22 cannot be rotated correctly. Also, since the receiving unit 5 cannot correctly receive the laser from the laser transmitter, it becomes impossible to maintain the height position of the nut in the same plane.

[0010] Further, in the support column height adjustment device disclosed in Patent Document 1, the nut 22 and the nut insertion hole 18 must be fitted together. However, since the sizes of the nut 22 and the nut insertion hole 18 are substantially the same, it is difficult to accurately fit the nut insertion hole 18 to the nut 22, and there is a problem that it is difficult to handle.

[0011] Also, in the support column height adjustment device disclosed in Patent Document 1, the nut insertion hole 18 of the rotating part 6 for rotating the nut 22 that moves up and down by rotation is adapted to the shape of the nut 22. Therefore, if the size of the nut 22 is changed, the height adjustment cannot be performed without changing the nut insertion hole 18. That is, there is a problem that only the height adjustment of the nut 22 with the same shape and the same size can be performed, and the versatility is low.

[0012] According to the support column height adjustment device disclosed in Patent Document 1, there are the above-described problems, and there is a problem that the workability is low.

[0013] The present invention has been made in view of such problems, and an object thereof is to provide a support leg height adjustment device that can be easily operated and has high workability.

Means for Solving the Problems

[0014] A support leg height adjustment device according to an aspect of the present invention is disposed on a foundation floor and includes a support base that abuts against the foundation floor, a support pedestal that supports a floor panel, and a support column that extends in the vertical direction and connects the support base and the support pedestal. The support pedestal is a support leg height adjustment device that adjusts the height of a support leg that moves along the support column by rotating about a rotation axis along the vertical direction. The device includes an operation unit for an operator to grip and operate, a gripping unit that is connected to the operation unit, has a fitting hole, and grips the support pedestal by fitting the support pedestal into the fitting hole and is movable in the vertical direction, a drive unit that rotates the gripping unit about a rotation axis along the vertical direction, a light receiving unit that receives laser light emitted from a laser oscillator that irradiates laser light at a reference height position, and a laser light detection unit that is movable in the vertical direction and detects that the laser light has entered the light receiving unit. During the height adjustment operation, the laser light detection unit and the gripping unit maintain a predetermined distance, and as the gripping unit moves, the laser light detection unit also moves. When the laser light detection unit detects laser light while the drive unit is rotating the gripping unit during the height adjustment operation, the drive unit stops the rotation of the gripping unit.

[0015] Accordingly, according to this support leg height adjustment device, the operator can easily operate by gripping the operation unit, and there is no need for the operator to bend down for each support leg whose height position is to be adjusted, and the operation can be performed in a standing state, resulting in high workability. Therefore, the operator can easily perform the adjustment work of the height position of the support leg, and the work efficiency is improved.

[0016] Further, in the above-described support leg height adjustment device, the device may further include a main shaft that extends downward from the operation unit, a main shaft base that is connected to the lower end of the main shaft and is disposed above the drive unit and the gripping unit, and a connecting column that extends downward from the main shaft base and whose end abuts against the foundation floor. There may be a plurality of the connecting columns, and they may be arranged so as to surround the gripping unit, and the device may be self-supporting by the connecting columns.

[0017] As a result, since the support leg height adjustment device has a connecting column, the connecting column can be self-supporting by contacting the foundation floor, and when the operator operates the support leg height adjustment device, it can be easily made perpendicular to the foundation floor. For this reason, the adjustment work of the height position of the support leg can be efficiently performed, and the work efficiency is improved. Further, since the connecting column is provided, the state of the support leg height adjustment device with respect to the foundation floor can be easily kept vertical, so the operator can stably operate the support leg height adjustment device and easily perform the adjustment work of the height position of the support leg. Furthermore, since the connecting column is arranged so as to surround the gripping portion, the gripping portion can also be protected.

[0018] Further, in the above-described support leg height adjustment device, it may be further provided with a connecting column restraint portion that is arranged so as to connect the plurality of connecting columns and has a substantially circular shape.

[0019] In this way, since the plurality of connecting columns are connected by the connecting column restraint portion, the plurality of connecting columns are integrated and the strength of the connecting columns is improved. Also, the function of protecting the gripping portion is strengthened thereby.

[0020] Further, in the above-described support leg height adjustment device, the fitting hole may be tapered so as to become narrower upward.

[0021] In this way, since the fitting hole is tapered, when gripping the support pedestal with a gripping portion having a larger size than the support pedestal, the centers of the support pedestal and the gripping portion are likely to be aligned. As a result, the support pedestal can be reliably gripped by the gripping portion and rotated.

[0022] Further, in the above-described support leg height adjustment device, the fitting hole may be twisted upward.

[0023] As a result, when the support pedestal is fitted into the fitting hole, even if the directions of the fitting hole and the support pedestal are different, the support pedestal can be drawn toward the rotation center while following the twisted shape, and the support pedestal can be stably gripped and rotated.

Advantages of the Invention

[0024] According to the present invention, it is possible to provide a support leg height adjustment device that can be easily operated and has high workability.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0026] The configuration of the support leg height adjustment device according to this embodiment will be described with reference to the drawings. FIG. 1 is a perspective view showing the external configuration of the support leg height adjustment device according to the embodiment of the present invention. FIG. 2 is a front view showing the external configuration of the support leg height adjustment device according to the embodiment of the present invention.

[0027] In addition, for the coordinate axes shown in FIGS. 1 and 2, when operating the support leg height adjustment device, in the X-axis direction, when viewing the support leg height adjustment device 100 from the front, it is the left-right direction (lateral direction), and the positive X-axis direction and the negative X-axis direction represent the left side and the right side, respectively. The Y-axis direction is the depth direction (front-back direction) perpendicular to the X-axis, and the positive Y-axis direction and the negative Y-axis direction represent the front side and the back side, respectively. The Z-axis direction represents the up-down direction, that is, the vertical direction, and the positive Z-axis direction and the negative Z-axis direction represent the upper side and the lower side, respectively.

[0028] The support leg height adjustment device 100 according to this embodiment is a device for adjusting the height of the support legs 200 that are arranged on the foundation floor 300 for constructing a double floor and support the floor panels 400. An operator of the support leg height adjustment device 100 can easily perform the adjustment operation of the height position of the support legs 200 without bending over by using the support leg height adjustment device 100, and a plurality of floor panels 400 can be flatly installed on the support legs 200 after adjusting the height position.

[0029] As shown in FIGS. 1 and 2, the support leg height adjustment device 100 includes an operation unit 1 for an operator to hold and operate switches, a main shaft 4 extending downward from the operation unit, a laser light detection unit 6 installed on the side surface of the main shaft 4 and movable up and down along the main shaft 4 and capable of receiving laser light, a main shaft base 3 installed at the lower end of the main shaft 4, a gripping unit 2 arranged below the main shaft base 3 and capable of gripping a support pedestal 203 of the support leg 200 described later, a drive unit 5 located below the main shaft base 3 and above the gripping unit 2 for rotating the gripping unit 2, three connecting columns 31 extending downward from the main shaft base 3 and arranged to surround the gripping unit 2, and a substantially circular (ring-shaped, annular, ring-shaped) connecting column restraint portion 32 connecting the three connecting columns 31.

[0030] The operation unit 1 has an operation switch 11 and is shaped such that it is easy for the operator to hold and operate. That is, the shape of the operation unit 1 is of a thickness and shape that is easy for the operator to hold, and with the operation unit 1 held, the finger can easily reach the operation switch 11 and the operator can easily press the operation switch 11. Further, when the adjustment of the height position of the support leg is completed, the operation unit 1 is also provided with a lamp or the like that lights up to notify this. Also, instead of a lamp, a buzzer or the like may be provided to notify by sound.

[0031] Since the main shaft 4 extends long downward, the operator can easily fit the support pedestal 203 of the support leg 200 arranged on the base floor 300 into the fitting hole 21 of the gripping portion 2. For this reason, the operator can operate the support leg height adjusting device 100 in a standing state to perform work. Also, it is preferable that the main shaft 4 is cylindrical so that wiring or the like can pass through the cylinder. Thereby, wiring or the like is not exposed, and troubles such as disconnection can be suppressed.

[0032] The laser light detection unit 6 has a receiving unit 61 capable of receiving the laser light 501 emitted from the laser oscillator 500. Further, the laser light detection unit 6 is installed on the main shaft 4 and is movable in the vertical direction along the main shaft 4. Also, the laser light detection unit 6 is provided with a fixing pin 62 for fixing the positional relationship with the gripping unit 2. By operating the fixing pin 62, the distance between the laser light detection unit 6 and the gripping unit 2 is fixed. That is, the distance between the laser light detection unit 6 and the gripping unit 2 can be set to an arbitrary fixed distance. Specifically, during the height adjustment operation of adjusting the height position of the support leg 200, the laser light detection unit 6 and the gripping unit 2 maintain a predetermined distance, and as the gripping unit 2 moves up and down, the laser light detection unit 6 also moves up and down. Also, although details will be described later, during the height adjustment operation, when the laser light 501 emitted from the laser oscillator 500 is received by the receiving unit 61, the drive unit 5 stops the rotation of the gripping unit 2 that was rotating. Note that it is preferable that the laser light detection unit 6 has a box shape so that light other than the laser light 501 such as sunlight does not easily enter the receiving unit 61, and the receiving unit 61 is arranged inside. Note that the laser light detection unit 6 may have any configuration as long as it is configured such that light other than the laser light 501 such as sunlight does not easily enter the receiving unit 61, and other configurations than those described above are also possible.

[0033] The lengths of the three connecting columns 31 extending downward from the headstock 3 installed at the lower end of the main shaft 4 are the same as each other. More specifically, the connecting columns 31 extend from the lower end of the headstock 3, which is the bottom surface that is substantially perpendicular to the main shaft 4. For this reason, when the operator uses the support leg height adjustment device 100, if the tip portions 31a, which are the lower ends of the respective connecting columns 31, each contact the foundation floor 300, the main shaft 4 becomes substantially perpendicular to the foundation floor 300. Note that each of the tip portions 31a has a spherical shape. Thereby, although details will be described later, when the support pedestal 203 is fitted into the fitting hole 21 of the gripping unit 2 and rotated, if each of the tip portions 31a contacts the foundation floor 300, the support pedestal 203 will be correctly fitted into the fitting hole 21, and the height adjustment of the support leg 200 can be easily performed.

[0034] Also, when the support leg height adjustment device 100 is not in use, each of the tip portions 31a of the three connecting columns 31 contacts the floor surface such as the foundation floor 300, so that the support leg height adjustment device 100 can be installed independently without taking up space. In particular, as described above, since each of the tip portions 31a is spherical, it will be in point contact with the floor surface, and the support leg height adjustment device 100 can be made to stand independently. In addition, since it is preferable that the tip portion 31a is in point contact with the floor surface, the tip may be sharp, for example, the tip portion 31a may be conical. In this embodiment, it is assumed that there are three connecting columns 31, but as long as the support leg height adjustment device 100 has a structure that can stably stand independently, the number of connecting columns 31 may be three or more and is not limited to three. However, in order to stand more stably and without rattling, it is preferable that there are three tip portions 31a.

[0035] Also, as described above, a substantially circular connecting column restraint portion 32 is formed on the connecting column 31 so as to connect each connecting column 31. That is, each connecting column 31 is connected by the connecting column restraint portion 32 and configured as an integral body. The upper end of the connecting column 31 is fixed to the main shaft base 3, but the connecting column restraint portion 32 can suppress problems such as the 31 coming off from the main shaft base 3. In addition, since the connecting column 31 is arranged so as to surround the gripping portion 2, the gripping portion 2 can be protected.

[0036] The connecting column 31 and the connecting column restraint portion 32 are arranged so as to surround the gripping portion 2. However, the smaller the diameter of the connecting column restraint portion 32, the shorter the distance from the support leg 200, and the higher the accuracy of height adjustment. In that case, however, the taper of the fitting hole 21 of the gripping portion 2 for guiding the support pedestal 203 cannot be made large, resulting in a decrease in workability. Conversely, if the diameter of the connecting column restraint portion 32 is increased, the taper of the fitting hole 21 can be made large, making it easier to guide. However, since the support leg height adjustment device 100 itself will become larger and there is a risk that it will be difficult for the operator to handle, it is advisable to arrange it considering the balance.

[0037] The drive unit 5 is connected to each connecting column 31 and is integrated with the gripping unit 2. Therefore, when the gripping unit 2 moves up and down, the drive unit 5 also moves up and down in the same manner. The drive unit 5 is, for example, a motor and rotates the gripping unit 2. The rotation axis of the gripping unit 2 is along the main shaft 4, and when the support leg height adjustment device 100 is in use, the gripping unit 2 rotates with the vertical direction as the rotation axis.

[0038] The gripping unit 2 has a fitting hole 21 into which the support pedestal 203 fits. When the support leg height adjustment device 100 is in use, the support pedestal 203 is placed over the upper side of the support leg 200 installed on the foundation floor 300, and the support pedestal 203 fits into the fitting hole 21.

[0039] Here, the configuration of the gripping unit 2 will be described with reference to the drawings. FIG. 3 is a perspective view showing the configuration of the gripping unit in the support leg height adjustment device according to an embodiment of the present invention. FIG. 4 is a bottom view showing the configuration of the gripping unit in the support leg height adjustment device according to an embodiment of the present invention. The coordinate axes shown in FIGS. 3 and 4 are the same as those in FIGS. 1 and 2.

[0040] As shown in FIGS. 3 and 4, the fitting hole 21 of the gripping portion 2 is substantially square when viewed from the bottom surface side, and is tapered so as to narrow upward. Further, the fitting hole 21 is also shaped to twist upward. As will be described later, the support pedestal 203 of the support leg 200 gripped by the gripping portion 2 has a substantially square shape, and the shape of the fitting hole 21 is substantially square when viewed from the bottom surface side in accordance with the shape of the support pedestal 203. Since the bottom surface side of the fitting hole 21 is larger in size than the support pedestal 203 and the fitting hole 21 is tapered, the support pedestal 203 can be easily fitted into the fitting hole 21 by covering the support pedestal 203 from above with the gripping portion 2. In this way, the gripping portion 2 attracts the support pedestal 203, and the centers of the gripping portion 2 and the support pedestal 203 are aligned, so that the gripping portion 2 can easily grip the support pedestal 203. Further, since the fitting hole 21 is tapered as described above, when the support pedestal 203 is gripped by the gripping portion 2 that is larger in size than the support pedestal 203, the centers of the support pedestal 203 and the gripping portion 2 are aligned. Thereby, the support pedestal 203 can be surely gripped by the gripping portion 2 and rotated.

[0041] Furthermore, since the fitting hole 21 is tapered, the degree of freedom in the size of the support pedestal 203 is high. That is, if the support pedestal 203 is relatively large, it will be gripped at a relatively lower position of the fitting hole 21, and if the support pedestal 203 is relatively small, it will be gripped at a relatively upper position of the fitting hole 21. If the range of the size of the support pedestal 203 is smaller than the size of the lower part of the fitting hole 21 and smaller than the size of the upper part, it can be gripped by the gripping portion 2.

[0042] Further, since the fitting hole 21 is twisted as it goes upward, by covering the gripping portion 2 from above the support pedestal 203 and rotating the gripping portion 2, the support pedestal 203 is guided along the twist shape while following the twist and is drawn to the rotation center of the gripping portion 2. As a result, the rotation axis of the gripping portion 2 and the rotation axis of the support pedestal 203 become substantially the same, and there is no shake in the rotation of the support pedestal 203 that is gripped and rotated by the gripping portion 2, and the support pedestal 203 can be rotated correctly. Note that the gripping portion 2 is made of resin. Therefore, the gripping portion 2 is lightweight and is less likely to damage the support pedestal 203.

[0043] Further, since the support pedestal 203 is substantially square, the fitting hole 21 is also made substantially square when viewed from the bottom surface side accordingly. However, the shape of the support pedestal 203 is not limited to a square. The shape of the fitting hole 21 may be adapted to the shape of the support pedestal 203. For example, if the support pedestal 203 is substantially circular, the fitting hole 21 may be made substantially circular when viewed from the bottom surface side. That is, the fitting hole 21 may be conical.

[0044] Next, the control configuration in the support leg height adjustment device 100 will be described with reference to the drawings. FIG. 5 is a block diagram schematically showing the control configuration in the support leg height adjustment device according to an embodiment of the present invention.

[0045] As shown in Fig. 5, the support leg height adjustment device 100 includes a control unit 7. The control unit 7 controls the operations of each part of the support leg height adjustment device 100. Therefore, signals from each part are transmitted to the control unit 7, and signals for operating each part are transmitted from the control unit 7 to each part. For example, when the operation switch 11 of the operation unit 1 is operated, the signal is transmitted to the control unit 7. Also, when the laser beam 501 is incident on the receiving unit 61 of the laser beam detection unit 6, a signal indicating that the laser beam 501 has been incident on the receiving unit 61 is transmitted from the laser beam detection unit 6 to the control unit 7. Thus, signals from each part are transmitted to the control unit 7. Further, the control unit 7 controls the operation of the drive unit 5. For example, it controls the rotation and stop of the gripping unit 2. Also, it controls the rotation direction of the gripping unit 2. During the height adjustment operation, when the laser beam 501 is incident on the receiving unit 61, a signal indicating that the laser beam 501 has been incident is transmitted from the laser beam detection unit 6 to the control unit 7, and the control unit 7 transmits a signal instructing the drive unit 5 to stop the rotation of the gripping unit 2.

[0046] Next, the configuration of the support leg 200 whose height is adjusted by the support leg height adjustment device 100 will be described with reference to the drawings. Fig. 6 is a front view showing the external configuration of the support leg according to an embodiment of the present invention. The coordinate axes shown in Figs. 3 and 4 are the same as the coordinate axes in Figs. 1 and 2, and show the coordinates in a state where the support leg 200 is placed on the floor surface.

[0047] As shown in Fig. 6, the support leg 200 includes a support base 201 that abuts against the base floor 300 when installed on the base floor 300, a support pedestal 203 that supports the floor panel 400, and a support column 202 that connects the support base 201 and the support pedestal 203. Also, on the upper surface of the support pedestal 203, a floor panel placement portion 204 on which the corner portion 401 of the floor panel 400 is placed is formed. The floor panel placement portion 204 is a portion where a depression is formed on the upper surface of the support pedestal 203, and the corner portion 401 is fitted and placed in the floor panel placement portion 204. Thereby, the floor panel 400 placed on the support pedestal 203 is positioned without moving.

[0048] The support column 202 is fixed to the support base 201 and extends vertically, with threads cut on its side surface. Further, the support column 202 is screwed with the support pedestal 203, and by rotating the support pedestal 203, the support pedestal 203 moves up and down along the support column 202. Note that whether the support pedestal 203 moves upward or downward is determined by the rotation direction of the support pedestal 203. Specifically, when the support pedestal 203 is rotated clockwise (forward rotation) when viewed from above, the support pedestal 203 moves downward along the support column 202. Also, when the support pedestal 203 is rotated counterclockwise (reverse rotation) when viewed from above, the support pedestal 203 moves upward along the support column 202. Therefore, when the support leg 200 is installed on the foundation floor 300, the support column 202 will be along the vertical direction, and the rotation axis of the support pedestal 203 will also be along the vertical direction. Also, when the support pedestal 203 rotates, it will move up and down along the vertical direction.

[0049] Note that in FIG. 6, the shape of the support pedestal 203 is shown as a substantially square, but as described above, the shape of the support pedestal 203 may be other shapes. For example, the support pedestal 203 may be substantially circular.

[0050] Next, the construction procedure of the double floor will be described with reference to the drawings. FIG. 7 is a perspective view for explaining the state in which the floor panel is placed on the support leg according to the embodiment of the present invention. FIG. 8 is a plan view showing the state after the floor panel is installed on the support leg according to the embodiment of the present invention.

[0051] A double floor is constructed by installing support legs 200 on a base floor 300 and placing a floor panel 400 thereon. As shown in Fig. 7, the corner portions 401 of the floor panel 400 are placed on four floor panel placement portions 204 formed on the upper surface of the support pedestal 203 of the support leg 200. Thereby, a double floor having a space between the base floor 300 and the floor panel 400 can be configured. Note that Fig. 7 shows the case where there is one floor panel 400, but actually a plurality of floor panels 400 will be arranged. Therefore, the support legs 200 are arranged at regular intervals, for example, over the entire surface of the base floor 300. Specifically, as shown in Fig. 8, the floor panel 400 is placed on the support legs 200 (support pedestals 203) arranged on the base floor 300 at regular intervals.

[0052] Here, in order to place a plurality of floor panels 400 on the support legs 200 and for the plurality of floor panels 400 to form a flat floor, it is necessary that the height positions of the support legs 200, that is, the height positions of the upper surfaces of the support pedestals 203, are all the same. Therefore, when the base floor 300 is flat, the height positions of the support legs 200 may be set to be the same in advance. That is, the distance from the lower surface of the support base 201 to the upper surface of the support pedestal 203 may be set to a constant distance. However, if the base floor 300 is not flat, when the heights of the support legs 200 are made the same, the floor panel 400 placed on the support pedestal 203 will not be flat. Generally, there are some irregularities on the base floor 300. Therefore, the height of the installation surface position of the support base 201 is different for each support leg 200. Thus, when the height of the installation surface position of the support base 201 is different for each support leg 200, if the heights of the support legs 200 are the same, the height position of the upper surface of the support base 201 will be different according to the height of the installation surface (base floor 300) of the support base 201, and the floor panel 400 placed on the support legs 200 cannot be installed flat.

[0053] Therefore, with a plurality of support legs 200 arranged at predetermined positions on the base floor 300, the height position adjustment operation of the support legs 200 (support pedestals 203) is performed using the support leg height adjustment device 100 so that the positions of the upper surfaces of the support pedestals 203 of the respective support legs 200 (the height positions of the support legs 200) are aligned.

[0054] The following describes the operation of adjusting the height of the support leg 200 using the support leg height adjustment device 100 with reference to the drawings. FIG. 9 is a view showing the working state of the support leg height adjustment device according to an embodiment of the present invention. Note that the coordinate axes shown in FIG. 9 are the same as those in FIGS. 1 and 2.

[0055] As described above, when constructing a double floor, a plurality of support legs 200 are installed on the foundation floor 300, and the floor panel 400 is placed thereon. Before placing the floor panel 400 on the support legs 200, an operation for adjusting the height position of the support legs 200 is performed so that the floor panel 400 is arranged flat. The operation for adjusting the height position of the support legs 200 is performed by an operator using the support leg height adjustment device 100 as shown in FIG. 9. Note that the operator stands behind the support leg height adjustment device 100 and operates the support leg height adjustment device 100 so as not to obstruct the incidence of the laser light 501 on the laser light detection unit 6 (reception unit 61).

[0056] As a construction procedure for the double floor, first, marking is performed to determine the arrangement positions of the plurality of support legs 200 to be arranged on the foundation floor 300. Marks indicating the arrangement positions of the support legs 200 are formed on the foundation floor 300 by the marking, and the support legs 200 are arranged on the foundation floor 300 using these marks as reference marks. Then, among the support legs 200 arranged on the foundation floor 300, the height of the reference support leg 200 is adjusted to a desired height. In order to adjust the height positions of the respective support legs 200, first, the laser oscillator 500 is set. The laser oscillator 500 can irradiate the laser light 501 so as to spread in the horizontal plane (XY plane). That is, the laser light 501 is irradiated at the same height. Based on the position of this laser light 501, the height positions of the respective support legs 200 are adjusted so that the position of the upper surface of the support pedestal 203 is lower than the height position of the laser light 501 by a predetermined distance.

[0057] First, the laser oscillator 500 is fixedly installed at a predetermined height position, and the laser beam 501 is irradiated. Then, among the support legs 200, the reference one is selected, and the operator manually adjusts its height position. That is, the operator rotates the support pedestal 203 of the reference support leg 200 by himself to adjust the height position of the support leg 200 to a desired position. After manually adjusting the height position of the reference support leg 200, the support leg height adjustment device 100 is placed on the reference support leg 200 from above. Specifically, the support pedestal 203 of the reference support leg 200 is fitted into the fitting hole 21 of the gripping portion 2. Although the spindle base 3 does not move relative to the spindle 4, as described above, the drive portion 5 and the gripping portion 2 are integrated and movable relative to the spindle 4. Normally, they are located downward due to gravity, but when the support pedestal 203 is fitted into the fitting hole 21, the gripping portion 2 moves upward. Then, the position of the laser beam detection unit 6 is adjusted so that the laser beam 501 irradiated from the laser oscillator 500 enters the light receiving unit 61 of the laser beam detection unit 6. As described above, the laser beam detection unit 6 is movable along the spindle 4. When the adjustment of the position of the laser beam detection unit 6 is completed, the distance between the laser beam detection unit 6 and the gripping portion 2 is fixed using the fixing pin 62 so that the distance between them becomes a constant distance. Specifically, after the adjustment of the position of the laser beam detection unit 6 is completed, the distance between the laser beam detection unit 6 and the gripping portion 2 is fixed by tightening the screw-shaped fixing pin 62.

[0058] Thereby, during the height adjustment operation of the support leg height adjustment device 100, the distance between the laser beam detection unit 6 and the gripping portion 2 is maintained at a predetermined distance, and if the gripping portion 2 moves upward or downward, the laser beam detection unit 6 also moves upward or downward accordingly. As described above, when adjusting the position of the laser beam detection unit 6 with the gripping portion 2 placed on the support pedestal 203 of the reference support leg 200 and the support leg 200 fitted into the fitting hole 21, since the fixing pin 62 is not tightened, the gripping portion 2 does not move even if it is moved to change the position of the laser beam detection unit 6.

[0059] After adjusting the position of the laser light detection unit 6 in accordance with the height position of the reference support leg 200 as described above, the operator adjusts the height positions of the support legs 200 other than the reference support leg 200 using the support leg height adjustment device 100. The operator covers any one of the support legs 200 other than the reference support leg 200 with the support leg height adjustment device 100 from above. That is, the support pedestal 203 of the support leg 200 is fitted into the fitting hole 21 of the gripping portion 2. In this state, the operator operates the operation switch 11 of the operation unit 1 to rotate the gripping portion 2 forward or backward. As a result, the support pedestal 203 moves downward or upward along the vertical direction (rotation axis direction). Specifically, it moves upward or downward along the support column 202.

[0060] In addition, when the height position of the support leg 200 whose height position is being adjusted is higher than the height position of the reference support leg 200, the operator rotates the gripping portion 2 forward, and when the height position of the support leg 200 whose height position is being adjusted is lower than the height position of the reference support leg 200, the operator rotates the gripping portion 2 backward. That is, with the support leg height adjustment device 100 covering the support leg 200 from above and the support pedestal 203 fitted into the fitting hole 21 of the gripping portion 2, if the receiving unit 61 is at a position higher than the laser light 501, the gripping portion 2 is rotated forward, and if the receiving unit 61 is at a position lower than the laser light 501, the gripping portion 2 is rotated backward.

[0061] For example, when the height position of the support leg 200 whose height position is being adjusted is higher than the height position of the reference support leg 200, by rotating the gripping portion 2 forward, the support pedestal 203 held by the gripping portion 2 also rotates forward and moves downward. Further, if the support pedestal 203 moves downward, the gripping portion 2 also moves downward accordingly. Also, as described above, the distance between the laser light detection unit 6 and the gripping portion 2 is maintained at a predetermined distance. If the gripping portion 2 moves downward, the laser light detection unit 6 also moves downward accordingly.

[0062] Further, for example, when the height position of the support leg 200 whose height position is being adjusted is lower than the height position of the reference support leg 200, by reversing the gripping portion 2, the support pedestal 203 held by the gripping portion 2 also reverses and moves upward. Also, if the support pedestal 203 moves upward, the gripping portion 2 moves upward accordingly. Further, if the gripping portion 2 moves upward, the laser light detection unit 6 moves upward accordingly.

[0063] Here, when the height position of the support leg 200 whose height position is being adjusted is lower than the height position of the reference support leg 200, the position of the receiving portion 61 of the laser light detection unit 6 is lower than the laser light 501 emitted from the laser oscillator 500. At this time, as described above, by reversing the gripping portion 2, the receiving portion 61 moves upward. When the laser light 501 enters the receiving portion 61, the height position of the support leg 200 whose height position is being adjusted becomes the same as the height position of the reference support leg 200. Specifically, the distance from the position of the laser light 501 to the upper surface position of the support pedestal 203 being adjusted becomes the same as the distance from the position of the laser light 501 to the upper surface position of the support pedestal 203 of the reference support leg 200. Thus, when the laser light 501 enters the receiving portion 61, the control unit 7 controls the operation of the driving unit 5 to stop the rotation of the gripping portion 2. Thereby, the adjustment of the height position of the support leg 200 whose height position is being adjusted is completed.

[0064] Also, when the height position of the support leg 200 whose height position is being adjusted is higher than the height position of the reference support leg 200, the position of the receiving portion 61 of the laser light detection unit 6 is higher than the laser light 501 emitted from the laser oscillator 500. At this time, as described above, by rotating the gripping portion 2 forward, the receiving portion 61 moves downward. When the laser light 501 enters the receiving portion 61, the height position of the support leg 200 whose height position is being adjusted becomes the same as the height position of the reference support leg 200. Thus, when the laser light 501 enters the receiving portion 61, the control unit 7 controls the operation of the driving unit 5 to stop the rotation of the gripping portion 2. Thereby, the adjustment of the height position of the support leg 200 whose height position is being adjusted is completed.

[0065] In this way, by adjusting the height positions of all the support legs 200 except the reference support leg 200, the height positions of all the support legs 200 become the same. Therefore, although irregularities are formed on the foundation floor 300, by placing the corner portion 401 of the floor panel 400 on the floor panel placement portion 204 of the support leg 200, a flat floor surface is formed by the floor panel 400.

[0066] Also, as described above, according to the support leg height adjustment device 100 according to the present embodiment, when an operator adjusts the height of the support leg 200 using the support leg height adjustment device 100, the tip portions 31a of the three connecting columns 31 contact the foundation floor 300, so that the support leg height adjustment device 100 can be stably operated. Thereby, the operability of the support leg height adjustment device 100 is improved, and the height of the support leg 200 can be adjusted more reliably. Also, as described above, in order to stand more stably without rattling, it is preferable that there are three tip portions 31a.

[0067] Also, since the fitting hole 21 of the gripping portion 2 is tapered, the degree of freedom in the size of the support pedestal 203 is high, and it is possible to correspond to a plurality of support pedestals 203 having different sizes. Specifically, any support pedestal 203 that fits into the fitting hole 21 and is gripped by the fitting hole 21 can be corresponded to without replacing the gripping portion 2.

[0068] Also, since the fitting hole 21 of the gripping portion 2 is twisted, when the gripping portion 2 grips and rotates the support pedestal 203, the center of the support pedestal 203 is drawn into the rotation center of the gripping portion 2, so that there is no wobble in the rotation of the support pedestal 203 and it can be correctly rotated.

[0069] (Other Embodiments) Although the support leg height adjustment device 100 according to this embodiment has been described, the support leg height adjustment device 100 may have a configuration other than the above description. For example, the shape of the operation unit 1 of the support leg height adjustment device 100 may be any shape that is easy for the operator to hold and operate, and may have a configuration different from the operation unit 1 described above. The configuration of the operation unit according to other embodiments will be described with reference to the drawings. FIG. 10 is an enlarged view showing the external configuration of the operation unit of the support leg height adjustment device according to another embodiment of the present invention.

[0070] As shown in FIG. 10, the operation unit 111 of the support leg height adjustment device 100 according to another embodiment is arranged substantially perpendicular to the main shaft 4, and includes a support leg raising button 111a, a support leg lowering button 111b, an automatic operation button 111c, a main switch 111d, a laser receiving lamp 111e, and an operation status lamp 111f.

[0071] The automatic operation button 111c is operated when adjusting the height of the support leg 200. The automatic operation button 111c is a trigger button, and the operator operates it with, for example, the index finger. When the operator operates (turns on) the automatic operation button 111c, the gripping part 2 starts to rotate either forward or backward. That is, the control unit 7 instructs the drive unit 5 to rotate. Here, the receiving unit 61 of the laser light detection unit 6 has a predetermined width in the vertical direction, and signals are transmitted from the laser light detection unit 6 to the control unit 7 separately for the case where the laser light 501 is incident near the middle of the upper and lower ranges, the case where the laser light 501 is incident above the middle, and the case where the laser light 501 is incident below the middle. That is, the control unit 7 can also grasp the difference in the vertical incident position of the laser light 501 in the receiving unit 61 of the laser light detection unit 6.

[0072] For example, when the height position of the support leg 200 whose height position is being adjusted is lower than the height position of the reference support leg 200, the position of the receiving unit 61 of the laser light detection unit 6 is lower than the laser light 501 irradiated from the laser oscillator 500. That is, the laser light 501 enters above the vicinity of the middle of the receiving unit 61 in the laser light detection unit 6. Therefore, a signal indicating that the laser light 501 enters above the vicinity of the middle of the receiving unit 61 is transmitted from the laser light detection unit 6 to the control unit 7. In this case, when the control unit 7 controls the operation of the driving unit 5 to reverse the gripping unit 2, the receiving unit 61 moves upward together with the support pedestal 203, and when the laser light 501 enters the vicinity of the middle of the receiving unit 61, the control unit 7 controls the operation of the driving unit 5 and the rotation of the gripping unit 2 stops. Thereby, the adjustment of the height position of the support leg 200 whose height position is being adjusted is completed.

[0073] Also, for example, when the height position of the support leg 200 whose height position is being adjusted is higher than the height position of the reference support leg 200, the position of the receiving unit 61 of the laser light detection unit 6 is higher than the laser light 501 irradiated from the laser oscillator 500. That is, the laser light 501 enters below the vicinity of the middle of the receiving unit 61 in the laser light detection unit 6. Therefore, a signal indicating that the laser light 501 enters below the vicinity of the middle of the receiving unit 61 is transmitted from the laser light detection unit 6 to the control unit 7. In this case, when the control unit 7 controls the operation of the driving unit 5 to rotate the gripping unit 2 forward, the receiving unit 61 moves downward together with the support pedestal 203, and when the laser light 501 enters the vicinity of the middle of the receiving unit 61, the control unit 7 controls the operation of the driving unit 5 and the rotation of the gripping unit 2 stops. Thereby, the adjustment of the height position of the support leg 200 whose height position is being adjusted is completed.

[0074] When operating manually, the operator operates the support leg raising button 111a and the support leg lowering button 111b. The support leg raising button 111a and the support leg lowering button 111b are used to adjust the height of the support leg 200 respectively. When the operator presses the support leg raising button 111a, the height of the support leg 200 increases (the support pedestal 203 rises). Also, when the operator presses the support leg lowering button 111b, the height of the support leg 200 decreases (the support pedestal 203 descends). More specifically, when the support leg raising button 111a is pressed, the gripping part 2 rotates in the reverse direction, and when the support leg lowering button 111b is pressed, the gripping part 2 rotates in the forward direction. As a result, the support pedestal 203 gripped by the gripping part 2 rotates in the reverse / forward direction, and accordingly, the support pedestal 203 rises / descends.

[0075] The main switch 111d is for turning on / off the power supply of the support leg height adjusting device 100. The laser reception lamp 111e lights up when the receiving part 61 receives the laser light 501 during the adjustment of the height of the support leg 200 by the support leg height adjusting device 100. Also, the operation status lamp 111f lights up when the power supply of the support leg height adjusting device 100 is on. Note that instead of the laser reception lamp 111e and the operation status lamp 111f, a buzzer or the like may be provided to emit a sound instead of lighting up.

[0076] The support leg raising button 111a and the support leg lowering button 111b are arranged near the position of the thumb when the operator holds the operation part 101. Also, the automatic operation button 111c is arranged near the position of the index finger when the operator holds the operation part 101. Also, the laser reception lamp 111e and the operation status lamp 111f are arranged on the upper surface of the operation part 101 so as to be easily visible to the operator. Also, the main switch 111d is arranged at a position where it is difficult to be touched when the operator holds the operation part 101 in order to prevent accidental operation.

[0077] According to the operation unit 101 according to another embodiment, when the operator performs an operation, the operation of each switch is easy, and it is also possible to prevent an erroneous operation. Further, the current operation state of the support leg height adjustment device 100 can be easily visually recognized.

[0078] The present invention is not limited to the embodiments described above, and can be implemented in various other forms. Therefore, such embodiments are merely illustrative in all respects and should not be construed in a limiting sense. The scope of the present invention is indicated by the claims and is not restricted by the text of the specification. Furthermore, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

Explanation of Reference Numerals

[0079] 1 Operation unit 2 Gripping part 3 Spindle headstock 4 Spindle 5 Driving part 6 Laser light detection part 7 Control part 11 Operation switch 21 Fitting hole 31 Connecting column 31a Tip part 32 Connecting column restraint part 61 Receiving part 62 Fixing pin 100 Support leg height adjustment device 101 Operation unit 111a Support leg raising button 111b Support leg lowering button 111c Automatic operation button 111d Main switch 111e Laser light receiving lamp 111f Operation status lamp 200 Support leg 201 Support base 202 Support column 203 Support pedestal 204 Floor panel placement part 300 Foundation floor 400 Floor panel 401 Corner part 500 Laser oscillator 501 Laser beam

Claims

1. It is disposed on a base floor and has a support base that abuts against the base floor, a support pedestal that supports a floor panel, and a support column that extends in the vertical direction and connects the support base and the support pedestal. The support pedestal is a support leg height adjustment device that adjusts the height of a support leg that moves along the support column by rotating about a rotation axis along the vertical direction, an operation part for an operator to grip and operate, a gripping part that is connected to the operation part, has a fitting hole, and grips the support pedestal by fitting the support pedestal into the fitting hole and is movable in the vertical direction, a driving part that rotates the gripping part about a rotation axis along the vertical direction, and includes a light receiving part that receives laser light emitted from a laser oscillator that irradiates laser light at a reference height position, and a laser light detection part that is movable in the vertical direction and detects that the laser light has entered the light receiving part, during the height adjustment operation, the laser light detection part and the gripping part maintain a predetermined distance, and as the gripping part moves, the laser light detection part also moves, during the height adjustment operation, when the laser light detection part detects laser light while the driving part is rotating the gripping part, the driving part stops the rotation of the gripping part. The support leg height adjustment device is characterized by this.

2. a main shaft that extends downward from the operation part, a main shaft base that is connected to the lower end of the main shaft and is disposed above the driving part and the gripping part, and further includes a connecting column that extends downward from the main shaft base and whose end abuts against the base floor. There are a plurality of the connecting columns, and they are arranged so as to surround the gripping part, and is capable of standing independently by the connecting columns. The support leg height adjustment device according to Claim 1 is characterized by this.

3. The support leg height adjustment device according to Claim 2, further comprising a connecting column restraint part that is arranged so as to connect the plurality of connecting columns and is substantially circular in shape.

4. The support leg height adjustment device according to Claim 1, wherein the fitting hole is tapered so as to become narrower upward.

5. The support leg height adjustment device according to Claim 1, wherein the fitting hole is twisted upward.

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