JP5937883B2 - Mounting member for building jack-up - Google Patents

Description

  The present invention relates to a jack-up mounting member that is attached to a building and used when jacking up a building using a jack device.

  2. Description of the Related Art Conventionally, a unit type building constructed by connecting a plurality of building units having columns, floor beams, and ceiling beams to each other is known as a kind of building. In the unit type building, the building unit is installed in a state where the pillar is placed on the foundation, and the floor beam extends along the foundation in the installed state.

  By the way, when a subsidence or a liquefaction phenomenon occurs in the ground where the building is constructed, the building may be tilted together with the foundation. In this case, in order to return the tilted building to the original horizontal state, it is considered to jack up (lift) the side that has sunk (down) in the building using a jack device (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2005-120771

  When jacking up the unit type building described above using a jack device, for example, a jack device may be installed between the foundation and the floor beam, and the floor beam may be jacked up by the jack device. However, in the above buildings, there are often only gaps that are large enough to allow ventilation between the foundation and the floor beam. In that case, it is difficult to install the jack device between the foundation and the floor beam. It is thought that.

  In addition, it is also possible to form a concave space opened upward in the foundation by hanging the upper surface side of the foundation, and jacking up the floor beam by installing a jack device in the concave space, in that case The work becomes extremely large and unrealistic.

  This invention is made | formed in view of the said situation, and makes it the main objective to provide the attachment member for jackup of a building which can perform suitably the operation which jacks up a building with a jack apparatus. .

  In order to solve the above-described problem, the building jack-up mounting member according to the first aspect of the present invention is a jack for a building that is used by being attached to the building when the building provided on the foundation is jacked up by a jack device. It is a mounting member for up, and it is respectively attached to two floor beams extending in the direction orthogonal to each other from the same column installed on the foundation, and the floor beam to be mounted is directed upward in the mounted state A pair of floor beam mounting portions having pressing surface portions to be pressed; and the pressing surface portion disposed inside the corner portions with respect to the pillars positioned at the corner portions of the floor beams in the mounting state of the floor beam mounting portions. And a push-up force applying portion to which a push-up force by the jack device is applied so as to generate the pressing force on the floor beam.

  According to the jack-up mounting member of the present invention, when a building is jacked up by a jack device, each floor beam mounting portion is respectively mounted on two floor beams extending orthogonally from the same column in the building, and the mounting state The pushing force is applied to the pushing force applying portion by the jack device. As a result, a pressing force for pressing the floor beam upward is generated on the pressing surface portion of each floor beam mounting portion, and the floor beam is lifted upward by this pressing force, and consequently the building is lifted upward (jacked up). .

  Here, in the mounting state with respect to the floor beam of each floor beam mounting portion, the push-up force imparting portion is disposed inside the corner portion with respect to the column located at the corner portion of each floor beam, so that the jack device is disposed inside the corner portion. Can be used to jack up floor beams. In this case, unlike the case where the floor beam is jacked up directly from below by the jack device, it is not necessary to arrange the jack device between the foundation and the floor beam. Therefore, it is not necessary to perform a troublesome work such as forming a space for placing the jack device in the foundation by hanging the foundation. Therefore, the work which jacks up a building with a jack apparatus can be performed suitably.

  The mounting member for jacking up a building according to a second aspect of the present invention is the first aspect of the invention, wherein the two floor beam mounting portions are formed so as to extend in directions orthogonal to each other, respectively along the floor beam that is the mounting target. The pressing surface portion presses the mounting target floor beam in a state of surface contact along the floor beam.

  According to the present invention, when the floor beam is pressed upward by the pressing surface portion of the floor beam mounting portion, the pressing surface portion can be pressed in a state of surface contact along the floor beam. Can be jacked up in a stable state. Further, in this case, since it is possible to suppress application of excessive local force (pressing force or the like) to the floor beam, it is also possible to suppress inconveniences such as deformation or damage of the floor beam. .

  The mounting member for jacking up a building according to a third aspect of the present invention is the first or second aspect of the invention, wherein each of the floor beam mounting portions is connected to the floor beam from the connecting portion with the column in the floor beam to be mounted. It is attached so that it may extend along, and the above-mentioned push-up force grant part is arranged in the corner part between the above-mentioned each floor beam attaching part, and these each floor beam attaching part is mutually connected, It is characterized by the above-mentioned. To do.

  According to the present invention, each floor beam attachment portion is attached to the floor beam to be attached so as to extend along the floor beam from the connection portion with the column, and is pushed up in the installation state of each floor beam attachment portion. The force applying portion is arranged at the corner between the floor beam mounting portions, in other words, around the pillar. In this case, the point at which the pushing force is applied by the jack device in the pushing force applying portion (jacking point) can be set close to any of the floor beam mounting portions, so that the pushing device can provide the pushing force. The push-up force applied to the part can be suitably transmitted to each floor beam attaching part.

  The jack-up mounting member for a building according to a fourth aspect of the present invention is the invention according to any one of the first to third aspects, wherein each of the floor beams has a web and a pair of flanges facing each other up and down across the web. It is made of section steel, and is disposed with the grooves formed by the web and the flanges open to the inside of the beams between the floor beams, and each of the floor beam mounting portions is the mounting It is attached in a state of being accommodated in the groove portion with respect to the floor beam as a target, and the pressing surface portion presses the flange above the groove portion in the floor beam from below. To do.

  According to the present invention, each floor beam attaching portion is attached to the floor beam in a state of being accommodated in the groove portion of the floor beam made of a shape steel. And in this attachment state, if pushing-up force is given to a pushing-up force provision part with a jack apparatus, the upper side flange of a floor beam will be pushed by the pressing face part of a floor beam attaching part, and a floor beam will be lifted with the pushing force. In the configuration in which the floor beam mounting part is attached to the floor beam in this way, the floor beam mounting part can be attached to the floor beam without using a fastener such as a bolt. The mounting operation can be greatly simplified. Moreover, since a fastener is unnecessary, it is not necessary to provide an insertion hole or the like for inserting the fastener into the floor beam. In other words, since it is possible to prevent a defective portion from being generated in the floor beam, it is possible to prevent a disadvantage that the strength of the floor beam to be jacked up is lowered.

  According to a fifth aspect of the present invention, there is provided the jack-up mounting member according to any one of the first to fourth aspects, wherein each of the floor beam mounting portions is mounted on the floor beam to be mounted. It has the column contact part which contacts the side part of this.

  According to the present invention, each floor beam mounting portion is mounted in a state where the column contact portion is in contact with the side surface portion of the column with respect to the floor beam to be mounted, so that the jackup mounting member is in a stable state. Can be attached to the floor beam. In addition, in the fourth invention in which the floor beam mounting portion is mounted on the floor beam in a state where the floor beam mounting portion is accommodated in the groove portion of the floor beam, when the floor beam mounting portion is mounted without using a fastener such as a bolt, a column contact is made. It is possible to prevent each floor beam mounting portion from being displaced along the floor beam by bringing the portion into contact with the side surface portion of the column. Therefore, it is possible to suppress the occurrence of inconveniences such as the floor beam mounting portion being displaced with respect to the floor beam and the mounting state becoming unstable during jackup of the floor beam.

  The mounting member for jacking up a building according to a sixth aspect of the invention is any one of the first to fifth aspects, wherein the center of gravity of the pressing surface portion when viewed from the front is positioned at the push-up force applying portion. It is characterized by that.

  According to the present invention, a push-up force by the jack device can be applied to the position of the center of gravity of the jack-up mounting member. For example, in the fourth invention, when the floor beam mounting portion is mounted without using a bolt or other fastener, the floor beam mounting portion is pressed in a state where it is placed on the lower flange in the groove portion of the floor beam. It is considered that a gap may be generated between the surface portion and the upper flange. In such a case, when jacking up the floor beam by applying a pushing force to the pushing force imparting portion by the jack device, the pressing surface portion of the floor beam attaching portion is first above the floor beam in a single state. It will raise to the position contact | abutted to a flange. At this time, in the configuration in which the push-up force is applied to the position of the center of gravity of the jack-up mounting member, the mounting member can be lifted in a well-balanced manner, so that the mounting member falls off from the groove portion of the floor beam during the ascent. Inconvenience can be made difficult to occur.

  According to a seventh aspect of the present invention, there is provided the jack-up mounting member for building according to the sixth aspect, wherein the gravity center position of each floor beam attachment portion and the gravity center position of the push-up force imparting portion are straight in the front view of the pressing surface portion. It is formed so that it may line up on a line.

  According to the present invention, in the front view of the pressing surface portion, the gravity center position of each floor beam attaching portion and the gravity center position of the push-up force applying portion are aligned on a straight line, and the effect of the sixth invention can be specifically obtained. It becomes possible.

  A mounting member for jacking up a building according to an eighth aspect of the present invention is the backing member according to any one of the first to seventh aspects, comprising a backing metal used when welding each floor beam to the column. The beam mounting portions are respectively welded and fixed to the columns and the floor beams to be mounted.

  According to the present invention, the jack-up mounting member is constituted by the backing metal. That is, when welding the floor beam and the column, the backing metal used for aligning both is also used as a jack-up mounting member. In this case, it is possible to effectively use a backing metal that is originally used only during construction. In addition, since the backing metal (that is, the jack-up mounting member) is welded and fixed to the column and the floor beam in advance at the manufacturing factory, the jack-up mounting member is used as the floor beam when jacking up the building. There is no need to perform installation work. Thereby, the work man-hour can be reduced when jacking up the building.

  According to a ninth aspect of the present invention, there is provided a building jack-up mounting member according to the eighth aspect, wherein each of the floor beam mounting portions has a column fixing plate portion that is welded and fixed in contact with a side surface portion of the column. It is characterized by that.

  According to the present invention, since the column fixing plate portion is welded and fixed in contact with the side surface portion of the column, the fixing strength of the backing metal (that is, the jack-up mounting member) can be increased. In this case, it can be said that this is a preferable configuration when the backing metal is also used as a jack-up mounting member.

The perspective view which shows the structure of the attachment member for jackup. The perspective view which shows the state which attached the attachment member for jackup to the building unit. Explanatory drawing for demonstrating the gravity center position of the attachment member for jackup. The perspective view which shows the outline | summary of a building. The perspective view which shows the structure of a building unit. Explanatory drawing explaining the work procedure at the time of returning an inclined building to a horizontal state. The perspective view which shows the backing metal which (a) used also as the attachment member for jackup, and (b) is the perspective view which shows the state which attached the backing metal to the building unit. The perspective view which shows the backing metal used also as the attachment member for jackup. The figure which shows the modification of the attachment member for jackup.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings. In the present embodiment, the present invention is embodied as a jack-up mounting member that is used by being attached to a building unit when jacking up a unit-type building constructed by a plurality of building units with a jack device. First, the unit type building will be described with reference to FIGS. 4 is a perspective view showing an outline of a building, and FIG. 5 is a perspective view showing a configuration of a building unit.

  As shown in FIG. 4, a building 10 such as a house includes a building main body 12 provided on a foundation 11 and a roof 13 provided on the building main body 12. The building 10 is a two-story building, and has a first floor part 14 and a second floor part 15. The building body 12 is configured by connecting a plurality of building units 20 to each other.

  As shown in FIG. 5, the building unit 20 includes four columns 21 disposed at the four corners thereof, and four ceiling beams 22 and floor beams 23 that connect the upper end portion and the lower end portion of each column 21, respectively. And. A rectangular frame (frame) is formed by the pillars 21, the ceiling beams 22 and the floor beams 23. The column 21 is made of square tubular square steel, and the ceiling girder 22 and floor girder 23 are made of channel steel having a U-shaped cross section.

  The floor girder 23 (same for the ceiling girder 22) includes a web 23a extending in the vertical direction and a pair of flanges 23b and 23c that are vertically opposed to each other with the web 23a interposed therebetween. The flanges 23b and 23c respectively extend from the upper end and the lower end of the web 23a to the same side toward the side. The floor beam 23 is formed with a groove 24 surrounded by the web 23a and the flanges 23b and 23c. The groove portion 24 of each floor beam 23 is opened laterally toward the inside (unit inside) of the building unit 20. In this case, the opposing floor beams 23 are arranged in a state where the groove portions 24 face each other.

  Adjacent floor beams 23 are arranged at right angles to each other. These adjacent floor beams 23 are fixed in a state where the end portions in the longitudinal direction thereof are in contact with the side surface portions 21 a of the columns 21 provided between the two beam beams 23. Specifically, the end portions of each floor beam 23 are fixed to two side portions 21 a adjacent to each other in the column 21 (in other words, orthogonal to each other). In this case, two adjacent floor beams 23 extend from the same column 21 in two directions orthogonal to each other.

  A plurality of small ceiling beams 25 are bridged between the large ceiling beams 22 on the long sides of the building unit 20 at predetermined intervals. Similarly, a plurality of floor beams 26 are bridged between the large floor beams 23 on the long sides of the building unit 20 at predetermined intervals. The ceiling beam 25 and the floor beam 26 are provided at the same interval and at positions corresponding to the upper and lower sides, respectively. For example, the ceiling beam 25 is made of lip groove steel, and the floor beam 26 is made of square steel. The ceiling member 27 is supported by the ceiling beam 25 and the floor member 28 is supported by the floor beam 26.

  Next, a jack-up attachment member that is attached to the building unit 20 when the building 10 having the above-described structure is jacked up by the jack device will be described. FIG. 1 is a perspective view showing a configuration of a jackup mounting member, and FIG. 2 is a perspective view showing a state in which the jackup mounting member is attached to a building unit 20.

  As shown in FIGS. 1 and 2, the jack-up mounting member 30 straddles two floor beams 23 extending orthogonally from the same column 21 in the building unit 20 (specifically, the building unit 20 of the first floor portion 14). It is attached to the two floor beams 23, and includes a pair of floor beam attachment portions 31 that are respectively attached to the two floor beams 23, and a push-up force applying portion 32 that is a portion to which a push-up force is applied by the jack device. . The floor beam attachment portions 31A and 31B are arranged in an approximately L shape so as to form a right angle with each other, and a push-up force applying portion 32 is provided between the floor beam attachment portions 31A and 31B. And each floor beam attaching part 31A, 31B is mutually connected via the raising force provision part 32, and the attachment member 30 for jackup is comprised. In the following description, for the sake of convenience, A and B are respectively attached to the reference numerals of the two floor beams 23 to be attached to the jackup mounting members 30 (each floor beam mounting portion 31).

  Each floor beam attaching portion 31 is formed in an elongated shape from an H-shaped steel, and has a web 31a and a pair of flanges 31b and 31c facing each other with the web 31a interposed therebetween. Each of these floor beam attaching portions 31 has the same configuration, and in the following description, A and B are given to the reference numerals of the respective floor beam attaching portions 31 for convenience.

  The outer surfaces (surfaces opposite to the web 31a side) of the flanges 31b and 31c are a pair of plane portions 33a and 33b that are parallel to each other. The distance between the flat portions 33a and 33b of the flanges 31b and 31c (in other words, the vertical height of the floor beam mounting portion 31) is the same as or slightly smaller than the vertical height of the groove portion 24 of the floor beam 23. ing.

  The floor beam attachment portions 31A and 31B are arranged such that the flat portions 33a of the flanges 31b are positioned on the same plane, and the flat portions 33b of the flanges 31c are positioned on the same plane. Has been placed. Each of the floor beam attachment portions 31A and 31B extends in a direction orthogonal to each other from the column arrangement space S in which the column 21 is arranged in the jack-up attachment member 30, thereby forming a substantially L shape. . Specifically, the floor beam attachment portion 31A is arranged in a state where one end portion thereof is aligned with the end portion of the floor beam attachment portion 31B in the longitudinal direction, and the floor beam attachment portion 31B has one end portion in the longitudinal direction of the floor beam attachment portion 31B. It arrange | positions in the state aligned with the edge part of 31 A of beam attachment parts. In this case, the floor beam mounting portion 31A has an end portion (end surface) on the floor beam mounting portion 31B side in the longitudinal direction (in other words, an end portion on the column arrangement space S side) and the floor beam mounting portion 31B has a floor beam mounting direction in the longitudinal direction. The end portion (end surface) on the portion 31A side (in other words, the end portion on the column arrangement space S side) is continuous in an L shape.

  The push-up force imparting portion 32 is formed in a quadrangular prism shape as a whole, and includes a rectangular cylindrical main body portion 35 and a pair of flat plate portions 36 provided on both sides in the axial direction of the main body portion 35 and facing each other. The main body portion 35 is made of a square steel pipe, and the flat plate portion 36 is made of a rectangular steel plate formed in accordance with the size of the main body portion 35. The main body portion 35 and the flat plate portions 36 are welded and integrated with each other, thereby forming the push-up force applying portion 32.

  Further, the push-up force applying part 32 has a square shape when the flat plate part 36 is viewed from the front. In this case, the length of one side (square shape) of the push-up force applying portion 32 is shorter than the length in the longitudinal direction of the floor beam attaching portion 31, and more specifically, the length in the longitudinal direction of the floor beam attaching portion 31. It is half or shorter than that.

  The outer surface of each flat plate portion 36 is a pair of flat portions 38a and 38b that are parallel to each other. The distance between the flat portions 38a and 38b is the same as the distance between the flat portions 33a and 33b of the floor beam attachment portions 31A and 31B.

  The push-up force imparting portion 32 is disposed at the corner between the floor beam mounting portions 31A and 31B, and the corner is aligned with the corner of each floor beam mounting portion 31A and 31B. Has been placed. In this arrangement state, the push-up force applying portion 32 is such that the flat portion 38a is positioned on the same plane as the flat portion 33a of the flange 31b of the floor beam attachment portions 31A and 31B, and the flat portion 38b is the floor beam attachment portion 31A. , 31B are located on the same plane as the flat portion 33b of the flange 31c. In this case, the push-up force imparting portion 32 has the side portions 39 adjacent to each other (the side portions 39 are surfaces orthogonal to the flat portions 38a and 38b) and the end portions of the flanges 31b and 31c of the floor beam attachment portions 31A and 31B. (In other words, the side surface portions of the floor beam attachment portions 31A and 31B) are in contact with each other and are welded and fixed to the end portions in the contact state. Thereby, each floor beam attachment part 31A, 31B and the raising force provision part 32 are integrated, and the attachment member 30 for jackup is comprised.

  In the jack-up mounting member 30 configured as described above, the floor beam mounting portion 31A extends in the longitudinal direction from the pushing force applying portion 32 toward the opposite side to the floor beam mounting portion 31B. Further, the floor beam attaching portion 31B extends from the pushing force applying portion 32 toward the opposite side of the floor beam attaching portion 31A in the longitudinal direction. Thereby, the attachment member 30 for jackup has comprised substantially W shape in the front view of the plane parts 33a and 33b (38a, 38b).

  Next, the position of the center of gravity of the jack-up mounting member 30 will be described. FIG. 3 is an explanatory diagram for explaining the position of the center of gravity of the jack-up mounting member 30. FIG. 3 shows the jack-up mounting member 30 in a state where the flat surface portion 33a of the floor beam mounting portion 31 is viewed from the front.

  As shown in FIG. 3, the jack-up mounting member 30 has a center-of-gravity position G located at the push-up force applying portion 32 in the front view of the flat portion 33 a. Specifically, the center-of-gravity positions G1 and G2 of the floor beam mounting portions 31A and 31B and the center-of-gravity position G3 of the push-up force applying unit 32 are located on the same straight line when viewed from the front of the plane portion 33a. The center-of-gravity position G3 of the push-up force applying part 32 exists at the center (center) of the center-of-gravity positions G1 and G2 of the floor beam attachment parts 31A and 31B. In this case, the center-of-gravity position G <b> 3 of the push-up force imparting portion 32 coincides with the center-of-gravity position G of the jackup attachment member 30, and the center-of-gravity position G is located at the approximate center of the push-up force imparting portion 32.

  In the jack-up mounting member 30, the gravity center positions G1, G2 of the floor beam mounting portions 31A, 31B are located at the center of the floor beam mounting portions 31A, 31B in the front view of the flat surface portion 33a. The center-of-gravity position G <b> 3 of the push-up force applying unit 32 is located at the center of the push-up force applying unit 32.

  Next, the mounting configuration when the jack-up mounting member 30 is mounted on the floor beams 23A and 23B of the building unit 20 will be described with reference to FIG.

  As described above, the jack-up attachment member 30 is attached to the building unit 20 by attaching the floor beam attachment portions 31A and 31B to the floor beams 23A and 23B to be attached. Here, the floor beam attachment portion 31A is attached to the floor cross beam 23A, and the floor beam attachment portion 31B is attached to the floor cross beam 23B.

  As shown in FIG. 2, each floor beam attaching portion 31A, 31B is attached to the floor beam 23A, 23B in a state of being disposed in the groove portion 24 of the floor beam 23A, 23B. More specifically, the floor beam attachment portions 31A and 31B are attached to the floor beams 23A and 23B without using fasteners such as bolts. The floor beam attaching portions 31A and 31B are in a state where the flange 31c (in other words, the flat surface portion 33b) is placed on the lower flange 23c of the floor large beams 23A and 23B in the groove portion 24, and in other words, the flange 31b (in other words, the flat surface portion). 33a) is arranged in a state of facing (adjacent or abutting) the upper flange 23b of the floor beams 23A, 23B. Further, the floor beam attachment portions 31A and 31B are arranged in a state where they are in contact with or close to the webs 23a of the large floor beams 23A and 23B in the groove portion 24.

  In the mounting state of the floor beam mounting portions 31A and 31B, the end of the floor beam mounting portion 31A on the floor beam mounting portion 31B side in the longitudinal direction (corresponding to the column contact portion of the floor beam mounting portion 31A) is the column 21. The end of the floor beam attachment portion 31B on the side of the floor beam attachment portion 31A in the longitudinal direction (corresponding to the column contact portion of the floor beam attachment portion 31B) is in contact with the side surface portion 21a of the column 21. Has been. In this case, the column contact portion of the floor beam attachment portion 31A and the column contact portion of the floor beam attachment portion 31B are arranged in an L shape along the side surface portion 21a adjacent to the column 21, and each floor beam Corner portions between the column contact portions of the attachment portions 31 </ b> A and 31 </ b> B are aligned with the corner portions of the columns 21.

  In a state where these floor beam attaching portions 31A and 31B are attached to the floor large beams 23A and 23B, the push-up force applying portion 32 is disposed inside the building unit 20 with respect to the column 21 (unit inside). That is, when the building unit 20 is viewed in plan, the push-up force applying unit 32 is disposed between the floor beams 23A and 23B. As described above, the push-up force applying portion 32 is a portion to which a push-up force is applied from below, and the flat surface portion 38b serving as the lower surface (bottom surface) thereof receives the push-up force received by the jack device. It has become.

  When a push-up force is applied to the push-up force applying portion 32 by the jack device, the upper flanges 23b of the floor beams 23A and 23B are directed upward to the floor beam attachment portions 31A and 31B (the flange 31b) accordingly. A pressing force to be pressed is generated (see FIG. 6). The floor beams 23A and 23B are lifted upward by this pressing force, and as a result, the building unit 20 and thus the building 10 are lifted upward. In this case, the flat surface portion 33a (upper surface portion) of the flange 31b corresponds to the pressing surface portion.

  Further, the jack-up mounting member 30 has a symmetric shape with respect to the center position in the facing direction in which the flanges 31b and 31c (plane portions 33a and 33b) of the floor beam mounting portions 31A and 31B face each other. Therefore, when attaching the floor beam attaching portions 31A and 31B to the floor large beams 23A and 23B, it is possible to attach any of the plane portions 33a and 33b upward. That is, in the configuration shown in FIG. 2, the floor beam attachment portions 31A and 31B are attached to the floor beams 23A and 23B with the plane portion 33a on the top and the plane portion 33b on the bottom. The floor beam attaching portions 31A and 31B may be attached to the floor large beams 23A and 23B in such a direction that the plane portion 33b is on the top and the plane portion 33a is on the bottom. In this case, the flat surface portion 33b becomes the pressing surface portion. In the push-up force applying unit 32, the flat portion 38a is a push-up force receiving surface portion. As described above, the jack-up mounting member 30 can be mounted on the floor beams 23A and 23 regardless of whether the flat portions 33a and 33b are directed upward or downward, thereby improving convenience. ing.

  Next, when the building 10 is inclined due to uneven settlement or the like, a work procedure for returning the building 10 to a horizontal state by jacking up the building 10 using a jack device will be described. Here, in the jack-up operation, the above-described jack-up mounting member 30 is used. FIG. 6 is an explanatory diagram for explaining a work procedure when the inclined building 10 is returned to the horizontal state.

  As shown to Fig.6 (a), the building 10 exists in the state inclined with respect to the ground surface X with the foundation 11. As shown in FIG. Here, it is assumed that jack-up is performed by a jack device at a protruding corner portion (hereinafter referred to as a descending-side protruding corner portion) that is sinking (lowering) in the inclined building 10.

  The jack-up operation is performed by entering the space under the floor through an inspection port provided on the floor material 28. In the jack-up operation, first, as shown in FIG. 6B, the attachment operation for attaching the jack-up attachment member 30 to the building unit 20 constituting the descending-side protruding corner portion in the building 10 is performed. In this case, the jack-up mounting member 30 is mounted across the floor beams 23A and 23B on both sides of the building unit 20 with the protruding corner portion interposed therebetween. In other words, the floor beam attachment portions 31A and 31B of the jack-up attachment member 30 are disposed in the groove portions 24 of the respective floor beam 23A and 23B, thereby being attached to the respective floor beam 23A and 23B. Further, at the time of attachment, the end portions in the longitudinal direction of the floor beam attachment portions 31 </ b> A and 31 </ b> B (end portions on the column 21 side) are brought into contact with the side surface portions 21 a of the columns 21. As a result, the push-up force imparting portion 32 of the jack-up mounting member 30 is disposed on the inner corner of the building unit 20 (building 10) with respect to the column 21.

  Next, as shown in FIG.6 (c), the jack apparatus 45 is arrange | positioned in the lower position of the pushing-up force provision part 32 of the attachment member 30 for jackup in the underfloor space (inner space enclosed by the foundation 11), Jack up work by the jack device 45 is performed. The jack device 45 is configured as a hydraulic jack device, and includes a main body portion 46 installed on the ground surface X, and a ram 47 (lifting portion) that can be raised relative to the main body portion 46 by hydraulic pressure. A push-up portion 47a is provided at the upper end portion of the ram 47, and the push-up force applying portion 32 is pushed up from below by the push-up portion 47a.

  After the jack device 45 is installed below the push-up force applying unit 32, jack-up work by the jack device 45 is performed. In this operation, by raising the ram 47 of the jack device 45, a pushing force is applied to the pushing force applying portion 32 by the ram 47 (and consequently the jack device 45) (see the two-dot chain line in FIG. 6C). As a result, a pressing force is generated on the flange 31b of each floor beam attachment portion 31A, 31B to press the upper flange 23b of each floor beam 23A, 23B upward. Then, the floor beams 23A and 23B are lifted upward with respect to the foundation 11 by this pressing force, and as a result, the building unit 20 (and the descending corner of the building 10) is lifted upward with respect to the foundation 11. Then, the building 10 gradually shifts to a horizontal state, and when the building 10 becomes horizontal, the ram 47 is lifted by the jack device 45, that is, the jack-up operation is stopped. Specifically, the raising of the ram 47 is stopped while the hydraulic pressure of the jack device 45 is maintained.

  Next, as shown in FIG. 6 (d), a spacer 49 is arranged in the gap between the foundation 11 (specifically, its top end) and the building unit 20 while the building 10 is held in a horizontal state by the jack device 45. Set up. For example, the spacer 49 is disposed in the gap between the lower end of the column 21 of the unit 20 and the foundation 11 generated by jacking up the building unit 20 described above. The spacer 49 is made of, for example, a metal flat plate or a block material, and various thicknesses are prepared in advance. The spacer 49 is not necessarily provided between the lower end portion of the column 21 and the foundation 11, and instead of or in addition, the spacer 49 is provided between the floor beams 23 </ b> A and 23 </ b> B and the foundation 11. Also good.

  Next, the hydraulic pressure by the jack device 45 is released and the ram 47 is lowered. At this time, since the spacer 49 is disposed between the foundation 11 and the building unit 20, the horizontal state of the building 10 is maintained. Thereafter, the jack-up mounting member 30 is removed from each of the floor beams 23A and 23B. Thereby, a series of work is completed.

  As mentioned above, according to the structure of this embodiment explained in full detail, the following outstanding effects are acquired.

  A pair of floor beam attachment portions 31A and 31B for attaching the jack-up attachment member 30 to the two large floor beams 23A and 23B orthogonal to each other, and a push-up force applying portion 32 to which a push-up force is applied by the jack device 45 is provided. Prepared and configured. In this case, when the push-up force by the jack device 45 is applied to the push-up force applying portion 32, a pressing force for pressing the floor beams 23A, 23B upward is generated on the flat surface portion 33a of the floor beam attaching portions 31A, 31B. The floor beams 23A and 23B are lifted upward by the pressing force, and the building 10 is lifted upward.

  Further, the push-up force imparting portion 32 is located on the corner inner side with respect to the column 21 positioned at the corner of each of the floor beams 23A and 23B in a state where the floor beam mounting portions 31A and 31B are mounted on the floor beams 23A and 23B. Since it is arranged (inside the building unit 20), the jacking up of the floor beams 23A and 23B by the jack device 45 can be performed inside the corner portion. In this case, unlike the case where the jack device 45 is disposed between the foundation 11 and the large floor beams 23A and 23B and the large floor beams 23A and 23B are directly jacked up from below, the foundation 11 is suspended and the like. There is no need to perform troublesome operations such as forming a space for disposing the jack device 45 therein. Therefore, the work of jacking up the building 10 with the jack device 45 can be suitably performed.

  Further, in this case, since the two floor beams 23A and 23B can be jacked up by one jack device 45, compared to the case where one floor beam 23 is jacked up, the floor beams 23A and 23B at the time of jacking up. Such a load can be reduced. As a result, it is possible to suppress the occurrence of inconveniences such as deformation and scratching of the floor beams 23A and 23B.

  The floor beam attachment portions 31A and 31B are formed so as to extend in directions orthogonal to each other, and the floor beam attachment portions 31A and 31B are attached along the floor beams 23A and 23B to be attached, respectively. Then, when the floor beams 23A and 23B are pressed by the flat surface portions 33a of the floor beam mounting portions 31A and 31B, the flat surface portion 33 is pressed in a state of surface contact along the floor large beams 23A and 23B. In this case, the long floor beams 23A and 23B can be jacked up in a stable state, and an excessively large force (such as a pressing force) is locally applied to the long floor beams 23A and 23B. Therefore, inconveniences such as deformation and scratches of the floor beams 23A and 23B can be suppressed.

  Each floor beam attachment portion 31A, 31B is attached so as to extend along the floor large beam 23A, 23B from the connecting portion with the pillar 21 in the floor beams 23A, 23B to be attached, and between the floor beam attachment portions 31A, 31B. Each floor beam attaching part 31A, 31B was connected by the pushing-up force provision part 32 arrange | positioned in the corner part. In this case, the push-up force applying portion 32 is arranged around the column 21 in a state where the floor beam attaching portions 31A and 31B are attached to the floor large beams 23A and 23B, respectively. Therefore, the point (jack-up point) at which the pushing-up force is applied by the jack device 45 in the pushing-up force applying unit 32 is set close to each of the floor beams 23A and 23B, in other words, each of the floor beam mounting portions 31A and 31B. Therefore, the push-up force applied to the push-up force applying portion 32 can be suitably transmitted to the floor beam attachment portions 31A and 31B.

  Each floor beam attachment portion 31A, 31B was attached to the floor beam 23A, 23B in a state of being accommodated in the groove portion 24 of the floor beam 23A, 23B made of channel steel. In this case, when the push-up force is applied to the push-up force applying portion 32 by the jack device 45 in this mounting state, the upper flanges 23b of the floor beams 23A and 23B are pressed by the flat portion 33a of the floor beam attachment portions 31A and 31B. The floor beams 23A and 23B are lifted by the pressing force. Thus, in the structure which attaches floor beam attaching part 31A, 31B to floor large beam 23A, 23B, it becomes possible to attach floor beam attaching part 31A, 31B without using fasteners, such as a volt | bolt, to floor large beam 23A, 23B. . Therefore, the installation work of the floor beam attachment portions 31A and 31B can be greatly simplified. In addition, since no fastener is required, there is no need to provide an insertion hole or the like for inserting the fastener in the floor beams 23A and 23B. That is, since it is possible not to cause a defect in the floor beams 23A and 23B, it is possible to prevent the strength of the floor beams 23A and 23B to be jacked up from being lowered.

  A column abutting portion (specifically, a floor beam mounting portion 31A) that abuts on the side surface portion 21a of the column 21 in a state of being mounted on the floor beams 23A and 23B to be mounted on the floor beam mounting portions 31A and 31B, respectively. , 31B in the longitudinal direction on the column 21 side). Therefore, it is possible to attach the jack-up attachment member 30 to the floor beams 23A and 23B in a stable state. Further, when the floor beam attachment portions 31A and 31B are attached to the floor girder 23A and 23B without using fasteners such as bolts, the floor beam attachment portions 31A and 31B are displaced along the floor girder 23A and 23B. Therefore, the floor beam mounting portions 31A and 31B are displaced with respect to the floor large beams 23A and 23B during jack-up of the floor large beams 23A and 23B. Can also be suppressed.

  Since each floor beam attaching portion 31 is detachably attached to the floor beams 23A and 23B, the jackup attachment member 30 can be used (reused). Thereby, the effective utilization of the jackup mounting member 30 can be achieved.

  The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

  (1) In the above embodiment, the distance between the flat portions 33a and 33b in the floor beam attachment portions 31A and 31B is substantially the same as the vertical height of the groove portion 24 of the floor beams 23A and 23B. You may make the separation distance of 33b smaller than the vertical height of the groove part 24. FIG. In this case, in a state where the floor beam attachment portions 31A and 31B are placed on the lower flange 23c in the groove portion 24 of the floor large beams 23A and 23B, the flat portions 33a of the floor beam attachment portions 31A and 31B and the floor large beams 23A and 23B A gap is formed between the flange 23b and the flange 23b. Therefore, when the jacking device 45 applies a pushing force to the pushing force applying portion 32 to jack up the floor large beams 23A, 23B, first, the jack-up mounting member 30 is a flat portion of the floor beam attaching portions 31A, 31B in a single state. 33a will be raised to the position where it abuts against the upper flange 23b of the floor beams 23A, 23B. In this case, in the jack-up mounting member 30, since the gravity center position G is located at the push-up force applying portion 32 as described above, a push-up force can be applied to the gravity center position G. Therefore, the jack-up mounting member 30 can be lifted in a well-balanced manner, and the inconvenience that the mounting member 30 falls off the groove portion 24 during the lifting can be made difficult to occur.

  (2) In the above embodiment, the floor beams 23A and 23B are made of grooved steel, but a groove part such as H-shaped steel or C-shaped steel (lip grooved steel) (specifically, a pair of webs and a pair opposed to each other across the webs) You may comprise by the other shape steel which has the groove part enclosed by the flange of this. Even in such a case, if each floor beam 23A, 23B is installed in a state where the groove portion is opened sideways toward the inside of the building unit 20, the floor beam mounting portions 31A, 31B are connected to the floor beam as in the above embodiment. It can be attached to 23A and 23B in a state of being disposed in the groove.

  (3) In the above embodiment, the floor beam mounting portions 31A and 31B are mounted in the state where they are disposed in the groove portions 24 of the floor large beams 23A and 23B, but this may be changed. For example, when there is a gap between the foundation 11 (its top end) and the floor beams 23A, 23B, the floor beam mounting portions 31A, 31B are connected to the floor beams 23A, 23B using the gap. You may attach from the bottom. In this case, it is conceivable that the floor beam attachment portions 31A and 31B are attached to the lower surfaces of the floor big beams 23A and 23B (specifically, the lower flange 23c) with bolts. Specifically, the insertion holes are formed in the flanges 31b of the floor beam mounting portions 31A and 31B, the insertion holes are formed in the lower flanges 23c of the large floor beams 23A and 23B, and bolts are inserted into the respective insertion holes. It is possible to conclude with In this case, when the push-up force is applied to the push-up force applying portion 32 by the jack device 45, the pressing force that presses the lower flanges 23c of the floor beams 23A, 23B upward is applied to the flat portions 33a of the floor beam attachment portions 31A, 31B. The floor girder 23 and the building unit 20 are pushed upward by the pressing force.

  (4) When welding the floor beams 23A and 23B to the column 21 in the building unit 20, a backing metal may be used to align the floor beams 23A and 23B with the column 21. . Therefore, a jack-up mounting member may be configured using this backing metal. A specific example is shown in FIG. As shown in FIG. 7A, the backing metal 50 (corresponding to a jack-up attachment member) is formed by bending a steel plate and has a flat horizontal plate portion 51. The horizontal flat plate portion 51 has an L-shape, and includes a base portion 51a and a pair of protruding portions 51b protruding from the base portion 51a in directions orthogonal to each other. The backing metal 50 further includes a pair of vertical plate portions 52 that extend downward from the end portion on the opposite side of the base portion 51a in each overhang portion 51b. In this case, the overhanging portion 51b and the vertical plate portion 52 constitute a floor beam attaching portion, and the base portion 51a corresponds to a push-up force applying portion.

  As shown in FIG. 7B, the backing metal 50 is arranged in a state where the L-shaped inner side of the horizontal plate portion 51 is along the side surface portion 21a of the column 21, and in this arrangement state, each overhanging portion 51b is Each is welded and fixed in contact with the side surface portion 21 a of the column 21. On the outside of the backing metal 50, the floor beams 23A and 23B are provided. The large floor beams 23A and 23B are provided in a state where the upper flange 23b is placed on the overhanging portion 51b of the backing metal 50 and the web 23a is in contact with the vertical plate portion 52 from the outside. Yes. Here, when the floor beams 23A and 23B are welded to the column 21 in the unit manufacturing factory, the welding is performed with the floor beams 23A and 23B arranged on the backing metal 50 in this way. In this state, the floor beams 23 </ b> A and 23 </ b> B are welded and fixed to the column 21 and are welded and fixed to the overhanging portion 51 b and the vertical plate portion 52 of the backing metal 50. Thereby, the backing metal 50 is fixed by welding to the column 21 and the floor beams 23A and 23B.

  In the fixed state of the backing metal 50, the base 51 a is disposed inside the unit with respect to the column 21. That is, in the plan view of the building unit 20, the base 51a is disposed between the floor beams 23A and 23B. Therefore, also in this case, a push-up force can be applied to the base 51a by the jack device 45. When a pushing force is applied to the base 51a, the upper flanges 23b of the floor beams 23A and 23B are pressed upward by the respective overhanging portions 51b (the upper surfaces thereof are pressing surfaces). Thereby, the floor beams 23A and 23B are lifted upward, and as a result, the building unit 20 and thus the building 10 are lifted upward.

  According to this configuration, when welding the floor girder 23 to the column 21, the backing metal 50 used for aligning both of them can be used as a jack-up mounting member. Therefore, it is possible to effectively use the backing metal 50 that is originally used only during construction. Further, since the backing metal 50 is preliminarily welded and fixed to the column 21 and the floor beams 23A and 23B in the manufacturing factory, the jack-up mounting member is attached to the floor beams 23A and 23B when the building 10 is jacked up. No need to do work. Thereby, it is possible to reduce the work man-hours when jacking up the building 10.

  (5) When the mounting member for jack-up is configured using a backing metal, the backing metal may be configured as shown in FIG. 8, for example. The backing metal 60 shown in FIG. 8 is further from the end of the L-shaped inner side of each overhanging portion 51b of the horizontal plate portion 51 with respect to the backing metal 50 in the configuration of (4) (configuration of FIG. A pair of vertical plate portions 61 extending downward is provided. Each of the vertical plate portions 61 is fixed by welding in a state where the vertical plate portions 61 are in contact with the side surface portion 21 a of the column 21. In this case, since the fixing strength of the backing metal 60 can be increased, it can be said that this is a preferable configuration when the backing metal 60 is also used as a jack-up mounting member. The vertical plate portion 61 corresponds to the column fixing plate portion and constitutes a part of the floor beam mounting portion.

  (6) The configuration of the jack-up mounting member 30 is not necessarily limited to that of the above embodiment. For example, in the jack-up mounting member 70 shown in FIG. 9A, the push-up force imparting portion 72 has a right triangle shape in a front view of the flat portion 33a (or 33b). In this case, the two ends that form a right angle in the push-up force applying portion 72 are the same as the lengths in the longitudinal direction of the floor beam mounting portions 71A and 71B, respectively. The portions 71A and 71B are connected to the entire longitudinal direction. In this case, the push-up force applied to the push-up force applying portion 72 by the jack device 45 can be suitably transmitted to the entire longitudinal direction of each floor beam attaching portion 71A, 71B.

  Further, in the jack-up mounting member 75 shown in FIG. 9 (b), the floor beam mounting portions 76A and 76B are shorter than the floor beam mounting portions 31A and 31B of the above-described embodiment, and the floor beam 23A and 23B. In the attached state with respect to the column 21, the column 21 is disposed apart from the side surface portion 21a. The push-up force imparting portion 77 obliquely connects the floor beam attachment portions 76A and 76B at positions spaced from the column 21 toward the inside of the unit. Even in this case, each floor beam 23A, 23B can be pressed and lifted by the floor beam mounting portions 76A, 76B by applying a lifting force to the lifting force applying portion 77 by the jack device 45.

  (7) In the above embodiment, the floor beam mounting portions 31A and 31B in the jackup mounting member 30 have the same configuration, but may have different configurations. For example, the lengths in the longitudinal direction of the floor beam attachment portions 31A and 31B may be varied. Specifically, when each of the large floor beams 23A and 23B is such that the large floor beam 23A is attached to the long side of the building unit 20 and the large floor beam 23B is attached to the short side of the building unit 20, the floor beam attachment portion 31A. It is conceivable to make the length in the longitudinal direction longer than the length in the longitudinal direction of the floor beam attachment portion 31B.

  Moreover, you may change the structure of the raising force provision part 32 with respect to the thing of the said embodiment. For example, in the above-described embodiment, the main body portion 35 is formed of a square steel pipe. However, by changing this, the main body portion 35 is formed of a plurality of rectangular flat plate-like steel plates spanned between the flat plate portions 36 that are spaced apart from each other. May be. For example, in a front view of the flat plate portion 36, it is conceivable that two steel plates are provided in an L shape along the edge of the flat plate portion 36 so as to surround the flat plate portion 36 together with the floor beam attachment portions 31A and 31B. Further, in this case, another sheet steel plate may be provided so as to connect the corner portion of the two steel plates and the corner portions of the floor beam attachment portions 31A and 31B to increase the rigidity.

  (8) In the above embodiment, jacking-up of the building 10 by the jack device 45 is performed at the corner of the building 10, but it may be performed at the corner of entry. For example, when the floor girder 23 is made of H-shaped steel, the groove portions 24 of the two adjacent floor girder 23 that are adjacent to each other with the corners therebetween are opened to the outside side, so that the jack up The floor beam attachment portions 31A and 31B of the attachment member 30 can be disposed in the groove portions 24 of the floor beams 23 from the outside of the interior corner chambers and attached to the floor beams 23, respectively. In this case, since the push-up force applying unit 32 is disposed outside the entrance corner room, the push-up force applying unit 32 is pushed up by the jack device 45 outdoors.

  Note that jacking up by the jack device 45 may be performed in the building 10 at a place other than the protruding corner and the entering corner. For example, the jack-up attachment member 30 may be attached to the building unit 20 that does not constitute the protruding corner in the building 10 to perform jack-up.

  (9) When inspecting or repairing the top end of the foundation 11, the building unit 20 installed above the foundation 11 to be inspected or repaired is temporarily jacked up by the jack device 45 and inspected or repaired. It is possible. Therefore, in such a case, the building-up unit 20 may be jacked up by attaching the jack-up mounting member 30 to each floor beam 23 of the building unit 20.

  Moreover, in the unit type building 10, when installing each building unit 20 on the foundation 11 at the time of construction, it is thought that a level | step difference may arise between flooring materials 28 in the adjacent building unit 20. FIG. Therefore, in such a case, by attaching the jack-up mounting member 30 to the lower building unit 20 among the building units 20 and jacking up the unit 20 with the jack device 45, the level difference between the floor materials 28 can be increased. You may make it cancel.

  (10) Although the application example to the two-story building 10 has been described in the above embodiment, the present invention may be applied to a one-story building or a three-story building.

  (11) Although the application example to the unit type building has been described in the above embodiment, the present invention is also applied to buildings having other structures such as a building constructed by a steel frame construction method and a building constructed by a conventional wooden construction method. The invention can be applied. For example, in a building constructed by a steel frame assembling method, the jack-up attachment member of the present invention may be attached to a floor beam arranged along the foundation 11 and jacked up by the jack device 45.

  DESCRIPTION OF SYMBOLS 10 ... Building, 11 ... Foundation, 20 ... Building unit, 21 ... Column, 23 ... Floor large beam as floor beam, 23b ... Upper flange, 24 ... Groove part, 30 ... Jack-up attachment member, 31 ... Floor beam attachment part, 32 ... Push-up force imparting part, 33a ... Planar part as pressing surface part, 45 ... Jacking device.

Claims (10)

A jack-up mounting member for a building that is used in a state where the building provided on the foundation is jacked up by a jack device and is attached to the building,
A pair of pressing surfaces that are respectively attached to two floor beams extending in a direction orthogonal to each other from the same column installed on the foundation and press the floor beams to be mounted upward in the mounting state. A floor beam mounting part;
Pressing force the disposed the on Tsunobeuchi side with respect to said post is located at a corner of the floor beams in the mounting state of each floor beam attachment portion, presses the front Kiyukahari upward the pressing surface portion A push-up force applying unit to which a push-up force by the jack device is applied to cause
Equipped with a,
Each of the floor beam attachment portions is attached so as to extend along the floor beam from a connection portion with the column in the floor beam to be attached,
The jacking-up mounting member for a building, wherein the push-up force imparting portion is disposed at a corner between the floor beam mounting portions and connects the floor beam mounting portions to each other . In each floor beam attachment portions condition attached to the floor beams of each of the attachment object, according to claim 1, characterized in that it has a contact with the pillar abutment on the side surface of the pillar Mounting member for building up jacks. A jack-up mounting member for a building that is used in a state where the building provided on the foundation is jacked up by a jack device and is attached to the building,
A pair of pressing surfaces that are respectively attached to two floor beams extending in a direction orthogonal to each other from the same column installed on the foundation and press the floor beams to be mounted upward in the mounting state. A floor beam mounting part;
Pressing force the disposed the on Tsunobeuchi side with respect to said post is located at a corner of the floor beams in the mounting state of each floor beam attachment portion, presses the front Kiyukahari upward the pressing surface portion A push-up force applying unit to which a push-up force by the jack device is applied to cause
Equipped with a,
Each of the floor beam mounting portions has a column abutting portion that abuts on a side surface portion of the column in a state where the floor beam mounting portion is mounted on the floor beam to be mounted. Element. It is composed of a backing metal used when welding each floor beam to the column,
Jack-up mounting member of a building according to any one of claims 1 to 3, characterized in that each of said floor beams mounting portion are respectively welded to each of the pillars and the floor beam of the attachment object . A jack-up mounting member for a building that is used in a state where the building provided on the foundation is jacked up by a jack device and is attached to the building,
A pair of pressing surfaces that are respectively attached to two floor beams extending in a direction orthogonal to each other from the same column installed on the foundation and press the floor beams to be mounted upward in the mounting state. A floor beam mounting part;
Pressing force the disposed the on Tsunobeuchi side with respect to said post is located at a corner of the floor beams in the mounting state of each floor beam attachment portion, presses the front Kiyukahari upward the pressing surface portion A push-up force applying unit to which a push-up force by the jack device is applied to cause
Equipped with a,
It is composed of a backing metal used when welding each floor beam to the column,
A building jack-up mounting member, wherein each of the floor beam mounting portions is welded and fixed to the column and the floor beam to be mounted, respectively . 6. The mounting member for jackup of a building according to claim 4 or 5 , wherein each of the floor beam mounting portions has a column fixing plate portion that is fixed by welding while being in contact with a side surface portion of the column. . The two floor beam attaching portions are formed to extend in directions orthogonal to each other, and each is attached along the floor beam to be attached,
The building jack according to any one of claims 1 to 6, wherein the pressing surface portion presses the floor beam to be attached in a state of being in surface contact along the floor beam. Mounting member for up. Each of the floor beams is made of a shape steel having a web and a pair of flanges facing each other up and down across the web, and a groove formed by the web and each of the flanges is a beam between the floor beams. It is arranged open to the inside,
Each of the floor beam attaching portions is attached in a state of being accommodated in the groove portion with respect to the floor beam to be attached,
The said pressing surface part presses the said flange above the said groove part in the said floor beam from the downward direction, The mounting member for jackup of the building as described in any one of Claim 1 thru | or 7 characterized by the above-mentioned. Oite the front view of the pressing surface, in any one of claims 1 to 8 the center of gravity of the jack-up mounting member is characterized in that it is formed so as to be located in the push-up force applying portion A mounting member for jack-up of the building described. And the position of the center of gravity of the respective floor beam attachment portion in a front view of the pressing surface of claim 9, characterized in that the center of gravity of the push-up force applying portion is formed so as to respectively aligned in a straight line Mounting member for building up jacks.

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