JP5556652B2 - Welding joint method and welded joint structure of shelter inner shell unit - Google Patents

Description

  The present invention relates to a welded joint method and welded joint structure of a shelter inner shell unit that can ensure high durability, complete moisture-proof waterproofness, and electromagnetic shielding properties while ensuring workability and economy.

So far, the present applicant has already disclosed a specific configuration in Japanese Patent Application Laid-Open No. 2007-297898 as an excellent underground shelter configuration, and the underground shelter according to the configuration welds and joins the inner shell unit of the shelter. It is configured.

  However, in constructing the underground shelter described in the document, it is disclosed how to weld and join the shelter inner shell unit made of metal plate, and its specific welding method and welded joint structure. Not.

SUMMARY OF THE INVENTION An object of the present invention is to provide a welded joint method and welded joint structure for a shelter inner shell unit capable of ensuring high durability, complete moisture-proof waterproofness, and electromagnetic shielding properties while ensuring workability and economy. That is.

Invention of Claim 1 for solving the said subject is the welding joining method of the shelter inner shell units which are horizontal direction cylindrical bodies which consist of a metal plate, Comprising: The said welding joining method is the junction part of units. Welding is divided into an outer welded portion welded from the outside of the unit and an inner welded portion welded from the inside of the unit, and the ends of the outer welded portion and the inner welded portion are welded to each other, Its feature is that welding is formed in an annular shape without joining.

  Further, the invention of claim 2 is based on the invention of claim 1 and the welding joining method is such that a range having a horizontal or vertical inclination angle of the joint is welded from the inside of the unit to be an inner weld, exceeding the vertical. The feature is that a range having an inclination angle is welded from the outside of the unit to form an outer welded portion.

  Further, the invention according to claim 3 is based on the invention according to claim 1, and the welding joining method is such that the range corresponding to the floor or wall of the joint is welded from the inside of the unit to be the inner weld, and the range corresponding to the ceiling. It is characterized by welding from the outside of the unit to form an outer weld.

  Further, the invention of claim 4 is based on the invention of claim 1, and the outer welded portion is provided with a position regulating member at the joint portion to set an arbitrary interval between the units, and the inner back joint is joined to the inside of the unit. The feature is that an outer welded portion is formed by providing a guide.

  Further, the invention of claim 5 is based on the invention of claim 1, and the inner welded portion is provided with a position regulating member at the joint portion to set an arbitrary interval between the units, and the outer back joint is joined to the outside of the unit. It is characterized by providing a guide to form the inner weld.

  The invention of claim 6 is based on any one of inventions of claims 4 to 5, and a shaft member integrally formed with the metal plate at an arbitrary position of each unit, and interposed between the shaft members. It is characterized in that welding is performed using a position restricting member made of a spacer-fixed hardware.

  Further, the invention according to claim 7 is characterized in that welding is performed using a position restricting member that also serves as a backing material, on the premise of any one of claims 4 to 5.

  The invention of claim 8 is a welded joint structure between shelter inner shell units which are horizontal cylindrical bodies made of metal plates, and the welded joint structure includes an outer welded portion welded from the outside of the unit, and It is composed of an inner welded portion welded from the inside of the unit, and the outer welded portion and the end of the inner welded portion are joined and welded to form an annular shape in which welding of the unit joined portion is not interrupted. It is said.

  Further, the invention of claim 9 is based on the invention of claim 8, and the welded joint structure includes an inner welded portion welded from the inside of the unit in a range having a horizontal or vertical inclination angle of the joint, and an inclination exceeding the vertical. It is characterized by comprising an outer welded portion in which a range having corners is welded from the outside of the unit.

  Further, the invention of claim 10 is based on the invention of claim 8, and the welded joint structure includes an inner welded portion in which the floor or wall of the joined portion is welded from the inside of the unit, and a range corresponding to the ceiling from the outside of the unit. It is characterized by comprising a welded outer weld.

  Further, the invention of claim 11 is based on the invention of claim 8, and the outer welded portion is a position regulating member for setting an arbitrary interval between the units, and an outer welded portion for forming the outer welded portion inside the unit. The inner back joining guide is characterized by being provided.

  Further, the invention of claim 12 is based on the invention of claim 8, and the inner welded portion is a position restricting member for setting an arbitrary interval between the units, and an inner welded portion for forming the inner welded portion outside the unit. The outer backing joining guide is provided as a feature.

  Further, the invention of claim 13 is based on any one of the inventions of claims 11 to 12, and a shaft member integrally formed with a metal plate at an arbitrary position of each unit, and interposed between the shaft members. A feature of the present invention is that a position restricting member formed of the spacer fixing hardware is formed.

  Further, the invention of claim 14 is characterized in that a position restricting member that also serves as a backing material is formed on the premise of any of the inventions of claims 11 to 12.

  According to the first aspect of the present invention, there is provided a welding joining method between shelter inner shell units which are horizontal cylindrical bodies made of metal plates, and the welding joining method includes an outer side for welding a joint portion between the units from the outside of the unit. Welding is divided into a welded part and an inner welded part that is welded from the inside of the unit, and the ends of the outer welded part and the inner welded part are welded together to form a ring that does not break the unit joined part. Therefore, the joints are integrated with continuity at the molecular level, ensuring high uniformity, durability, earthquake resistance, moisture proof and waterproof properties, and electromagnetic shielding properties as armor walls, Normally, when the metal plates arranged on the surface side of the shelter inner shell unit consisting of a plurality of metal cylinders installed in the underground excavation hole are integrated by welding, the range corresponding to the ceiling is in a downward posture Weld However, in the range corresponding to the floor, welding will be difficult from the bottom side of the unit, making the construction difficult, but in the present invention, the range corresponding to the floor is from the indoor side. It can be welded in a downward posture, and the range corresponding to the wall can be welded vertically from the inside of the unit to the outside, not from the outside of the unit, thus ensuring an outside welding work space Therefore, it is not necessary to drill an extra drilling hole, so that workability and economic efficiency can be greatly improved.

Moreover, in the invention of claim 1, since the end portions of the outer welded portion and the inner welded portion are joined and welded to form an annular shape in which the welding of the unit joined portion is not interrupted, it is perfectly uniform as an armor wall. Durability, seismic resistance, moisture proof and waterproof, and electromagnetic shielding can be ensured.

In the invention of claim 2 based on claim 1, the welding joining method is to weld a range having a horizontal or vertical inclination angle of the joint portion from the inside of the unit to be an inner weld portion, and an inclination angle exceeding the vertical is set. Because the outer area is welded from the outside of the unit to make the outer welded part, it can be used even when the shelter inner shell unit, which is a cylindrical body made of a metal plate, has a circular cross section or a saddle cross section. The degree of freedom is increased, and it is possible to cope with the cross-sectional shape of various needs.

  In the invention of claim 3 based on claim 1, the welding joining method is such that the range corresponding to the floor or wall of the joint is welded from the inside of the unit to be the inner welded portion, and the range corresponding to the ceiling is the range of the unit. Since it is welded from the outside to form the outer welded part, it is possible to cope with the case where the shelter inner shell unit, which is a cylindrical body made of a metal plate, has a square or saddle-shaped cross section. It can cope with the cross-sectional shape of the frame of various needs.

According to the invention of claim 4 based on claim 1, the outer welded portion is provided with a position regulating member at the joint portion to set an arbitrary interval between the units, and an inner backing joint guide is provided inside the unit. Because the outer welded part is formed, the inner side of the outer side opposite to the outer side where the welding work is performed while setting an arbitrary interval between the metal plate end parts of each unit without performing the groove processing of the metal plate end part. Because it is possible to form a welding groove by arranging the backing joint guide, and to integrate the metal plates with the weld metal so as to fill this welding groove, so as to form a higher quality welded part, Higher moisture-proof and waterproof properties and electromagnetic shielding properties can be ensured, and the inner backing joint guide also functions as an installation guide when the unit is installed, thereby improving workability and economy.

In the invention of claim 5 on the premise of claim 1, the inner welded portion is provided with a position regulating member at the joint portion to set an arbitrary interval between the units, and an outer backing joint guide is provided on the outer side of the unit. Because the inner welded part is formed, the outer side opposite to the inner side where the welding operation is performed while setting an arbitrary interval between the metal plate end parts of each unit without performing the groove processing of the metal plate end part. Because it is possible to form a welding groove by arranging the backing joint guide, and to integrate the metal plates with the weld metal so as to fill this welding groove, so as to form a higher quality welded part, Higher moisture-proof and waterproof properties and electromagnetic shielding properties can be ensured, and the outer backing joint guide also functions as an installation guide at the time of unit installation, thereby improving workability and economy.

In the invention of claim 6 based on any one of the inventions of claims 4 to 5, a shaft member integrally formed with the metal plate at an arbitrary position of each unit, and interposed between the shaft members. Since the position restricting member composed of the spacer fixing hardware is used for welding, the positional relationship between the units can be fixed while securing a certain interval with sufficient strength. The size of the welding distortion can be suppressed to a minimum without shifting the position of the unit, and the accuracy of the construction completion of the entire unit can be improved. In addition, the space | interval of mutual shaft members is made into the arbitrary space | interval which does not impair the workability | operativity of a welding rod and welding equipment, and does not have a bad influence on workability | operativity and quality of welding.

In the invention of claim 7 based on any one of the inventions of claims 4 to 5, since welding is performed using a position restricting member that also serves as a backing material, the shaft members are usually surface-joined with a fixed hardware. The inner backing material can be omitted to form the outer weld, which is economical.

In invention of Claim 8, it is a welding joining structure of the shelter inner shell units which are horizontal direction cylindrical bodies which consist of metal plates, Comprising: The said welding joining structure is the outer welding part welded from the outer side of the unit, and the unit. It is composed of an inner welded portion welded from the inside, and the end portions of the outer welded portion and the inner welded portion are joined and welded so that the welding of the unit joined portion is not interrupted. It is integrated with continuity at the level, and the welded part is joined by continuous welding without interrupting the metal plate of the unit joint part, so complete uniformity, durability, earthquake resistance, Moisture-proof and waterproof properties and electromagnetic shielding properties can be secured.

In the invention according to claim 9, the welded joint structure is welded from the outside of the unit to the inner welded portion where the range having the horizontal or vertical inclination angle of the joint is welded from the inside of the unit, and the range having the inclination angle exceeding the vertical. In particular, in the shelter inner shell unit having a circular cross-section and a heel cross-section, a weld portion with high weld quality is formed, and high uniformity, durability, earthquake resistance, and moisture resistance as an armor wall are formed. Waterproof and electromagnetic shielding properties can be ensured.

In the invention of claim 10 based on any of the inventions of claims 8 to 9, the welded joint structure has an inner welded portion in which the floor or wall of the joined portion is welded from the inside of the unit, and a range corresponding to the ceiling. Because it consists of an outer welded part welded from the outside of the unit, especially in a shelter inner shell unit with a square cross section, it forms a welded part with high welding quality and high uniformity, durability, and earthquake resistance as an armored wall Moisture-proof and waterproof properties and electromagnetic shielding properties can be secured.

In the invention of claim 11 based on any one of the inventions of claims 8 to 9, the outer welded portion includes a position restricting member for setting an arbitrary interval between the units, and an outer welded portion on the inner side of the unit. Since the inner backing joint guide for forming is provided, it is formed by the mutual metal plate end portion and the inner backing joint guide without performing groove processing on the respective metal plate end portions. Since the weld metal is melted into the weld groove to form the welded portion, high uniformity, durability, earthquake resistance, moisture proof and waterproof properties, and electromagnetic shielding properties as an armored wall can be ensured.

In the twelfth aspect of the invention based on any one of the eighth to ninth aspects, the inner welded portion includes a position regulating member for setting an arbitrary interval between the units, and an inner welded portion outside the unit. Since the outer backing joint guide for forming is provided, it is formed by the mutual metal plate end portion and the outer backing joint guide without performing groove processing on the mutual metal plate end portion. Since the weld metal is melted into the weld groove to form the welded portion, high uniformity, durability, earthquake resistance, moisture proof and waterproof properties, and electromagnetic shielding properties as an armored wall can be ensured.

In the invention of claim 13 based on any one of the inventions of claims 8 to 12, a shaft member integrally formed with the metal plate at an arbitrary position of each unit, and interposed between the shaft members. Since the position regulating member consisting of the spacer fixing hardware is formed, the units can be integrated with the welded part with sufficient strength, and the welded part can be easily visually confirmed by the spacer member, and the welded part will be repaired in the future. Even in this case, the position restriction member can be maintained without any loss of workability.

In the invention of the fourteenth aspect based on the invention of the thirteenth aspect, since the position restricting member that also serves as the backing material is formed, only the fixed hardware and the mutual shaft material are usually used without forming the inner backing material. Since it also serves as a backing material, it is economical, and the strength of the joint can be greatly improved.

Welding and joining method of shelter inner shell unit with square cross section (state before welding) Welding and joining method of shelter inner shell unit with square cross section (state after welding) Welding method for shapes other than rectangular cross section Welding method of circular section Welding method for saddle-shaped cross section Welded joint structure with outer weld Welded joint structure having outer weld and outer position restricting member Welded joint structure having outer weld and inner position restricting member Welded joint structure with inner weld Welded joint structure with inner weld and inner position restricting member Welded joint structure with inner weld and outer position restricting member Welded joint structure having an inner position regulating member that also serves as a backing material Inner position regulating member that also serves as an inner backing joint guide Outer position regulating member that also serves as an outer backing joint guide Example of welded joint between outer weld end and inner weld end (before welding) Example of welded joint between outer weld end and inner weld end (post-weld state)

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The features of the welding joint method and weld joint structure of the shelter inner shell unit having the most typical square cross section as the cross sectional shape are shown in FIGS.

The shelter inner shell units 2a and 2b, which are horizontal cylindrical bodies having a rectangular cross section made of the metal plate 1, are temporarily assembled and joined to each other at the joint 3 in the state of FIG. 1 before welding, and in the state of FIG. 2 after welding. The outer welded portion 8 is formed with the range 7 corresponding to the ceiling as the outer welded portion range 4 and the inner welded portion 9 is formed with the range 6 corresponding to the floor or wall as the inner welded region 5, and the outer welded portion 8. And the end part welding part 10 of the inner side welding part 9 is formed, and it forms so that the welding part given to the junction part 3 of the unit may become a ring without interruption.

  The end welded portion 10 between the outer welded portion 8 and the inner welded portion 9 is formed in order to ensure high durability, complete moisture-proof and waterproof properties, and electromagnetic shielding properties, which are the problems of the present invention. When welding the metal plate of the shelter inner shell unit 2 having a thickness of 2 mm, when the weld depth of the weld is shallow, such as when the welded portion is not interrupted and is not annular, Complete moisture-proof and waterproof properties and electromagnetic shielding properties are impaired. Therefore, it is necessary to intentionally form the end joint weld 10 between the outer weld 8 and the inner weld 9.

When welding the joint portion 3 of the shelter inner shell unit 2, in which range of the shelter inner shell unit 2 the outer welded portion 8 to be welded from the outside or the inner welded portion 9 to be welded from the inner side is formed Are determined in view of (1) ensuring workability and quality of welding, and (2) priority of economic efficiency of the entire construction, and the determination process is shown below.

  (1) Since the workability and quality of welding are largely influenced by the welding posture, which is the positional relationship between the operator and the welded part, the element is determined as the highest priority standard.

There are four welding postures, a downward posture, a horizontal posture, a vertical posture, and an upward posture, depending on the positional relationship between the worker and the welded portion. The horizontal posture is welding performed in the lateral direction with respect to the worker, and the vertical posture is welding performed from the bottom to the top or from the top to the bottom with respect to the worker. The upward posture is welding performed in the upward direction with respect to the worker.

  When the product can be moved freely, welding in the downward position is easy to melt and the carrying rod is stable, and it is the simplest welding position from the technical viewpoint, so it is common to perform the welding in the downward position. The welding in the vertical and horizontal postures must be technically difficult and skillful to perform stable carrying rod compared to the downward posture, and the welding in the upward posture is melted. Since the weld metal is pulled vertically downward by gravity and flows out, considerable technology is required in semi-automatic welding and clothing arc welding.

The produced shelter inner shell unit 2 has a size and weight that cannot be easily moved, and even if it can be moved, the economy and safety will be lost. Can not.

  Therefore, (1) As for ensuring workability and quality of welding, the welding position does not change in the range 6b corresponding to the wall portion either inside or outside, but in the case of welding from the outside, wind and rain, etc. The range 6b, which corresponds to the wall, stands from the inside because there may be factors that impede workability and quality assurance, such as the inability to work due to the weather conditions, and the reduced workability due to the narrow work space. The range 7 corresponding to the ceiling portion is appropriate to be welded in the upward orientation, and the range 6a corresponding to the floor portion is upward from the inside in the downward orientation from the outside without welding in the upward orientation from the inside. It is appropriate to weld in a downward position from the outside without welding in a position.

  Next, (2) Regarding the priority of the economy of the whole construction, when welding the range corresponding to the wall from the inside, the excavation hole for installing the shelter inner shell unit 2 can be suppressed to the minimum size. It can produce multiple economic effects described in the next section.

  Normally, the excavation hole is excavated by carrying out earth retaining work, but when welding the area corresponding to the wall part from the outside, the wall part reinforcement of the shelter outer shell concrete is assembled on the outside of the shelter inner shell unit 2 It is necessary to construct a large excavation hole in consideration of the work space for assembling the outer formwork of the shelter shell concrete, but when the area 6b corresponding to the wall is welded from the inside, the shelter inner shell unit 2 The shelter inner shell unit 2 can be installed after assembling the shelter outer shell concrete wall rebars to be constructed outside, and when the wall of the shelter outer shell concrete is formed, the earth retaining member of the earth retaining work is used as the outer formwork, Ready-mixed concrete can be cast using the shelter inner shell unit 2 as an inner formwork. It can be sized to correspond to the finished appearance of the outer shell concrete, and at the same time, it can eliminate the backfill portion made of loosened soil that serves as a reservoir for groundwater that impairs durability, moisture resistance and waterproofing, etc. Welding the range 6b corresponding to the portion from the inside is a welding method that can form the intended underground shelter while realizing a shortening of the construction period and enhancing the economic effect.

  As described above, in the connection part 3 of the shelter inner shell unit 2, which range is the outer welded part range 4 and the outer welded part 8 is formed, and which is the inner welded part 9 is the inner welded part range. It can be said that the welding method shown in FIGS. 1 and 2 is the most effective form for the formation.

  As for other cross-sectional shapes of the shelter inner shell unit 2, a circular cross-section (FIG. 3 a) and a bowl-shaped cross-section (FIG. 3 b) can be considered in addition to the square cross-section.

  In any of the cross-sectional shapes shown in FIGS. 3A and 3B, the determination is made in view of the above-mentioned (1) ensuring the workability and quality of welding and (2) the priority of the economy of the entire construction. It is easy to understand if a judgment is made by adding an element called a tilt angle with respect to the horizontal reference of the weld surface to the same concept as the cross section.

  In FIG. 3a, a portion having an inclination angle 12 exceeding the vertical with respect to the horizontal reference is determined to be a range 7 corresponding to the ceiling, and an outer welded portion 8 and a horizontal to vertical inclination angle 11 are provided as the outer welded range 4. The portion is determined as a range 6 corresponding to a floor or a wall, an inner welded portion 9 is formed as an inner welded portion range 5, and the outer welded portion 8 and the end joint welded portion 10 of the inner welded portion 9 are formed. It can be judged that it is appropriate to form the welded part formed and applied to the joint part 3 in an annular shape without interruption.

  In FIG. 3b, the range 6 clearly corresponding to the floor or wall can be understood, but here again, the portion having the inclination angle 12 exceeding the vertical relative to the horizontal reference is determined as the range 7 corresponding to the ceiling, and the outer welded portion The outer welded portion 8 as the range 4 and the portion having the horizontal or vertical inclination angle 11 as the range 6 corresponding to the floor or wall, and the inner welded portion 9 as the range 5 of the inner welded portion, respectively. It can be judged that it is appropriate to form the end joint welded portion 10 of the outer welded portion 8 and the inner welded portion 9 so that the welded portion applied to the joined portion 3 is formed in an unbroken ring shape.

  Next, a specific structure of the joint 3 of the shelter inner shell unit 2 made of the metal plate 1 is shown in FIGS.

  4 to 5, the welding joint structure shown in FIGS. 4 to 5 is formed by forming the shaft member 15 of the position restricting member at an arbitrary position of the metal plate 1 and using the fixed metal member 17 with the spacer of the position restricting member. 1 shows a situation in which an arbitrary interval B20 as a width of the welded portion is secured and the respective shelter inner shell units 2a and 2b are fixed at a fixed position, and in particular, the outer welded portion 8 or the metal plate 1 or In the structure in which the shaft member 15 of the position restricting member and the solid metal object 17 with the spacer of the position restricting member are arranged on the same side as the inner welded portion 9, the space at which the shaft member 15 of the position restricting member is a working space by the spacer A 19 is secured while securing A19, and a weld metal is welded to a welding groove formed by the end portion of the metal plate having an arbitrary interval B20 and the inner backing joining guide 13 or the outer backing joining guide 14. Plank Forming a weld having sufficient wall thickness corresponding to the.

Welding having a more economical backing material and position regulating shaft 18 that also serves as the backing material of the inner backing joint guide 13 or the outer backing joint guide 14 with the shaft member 15 of the position regulating member. The joining structure is shown in FIG. 6. FIG. 6 a shows that the arbitrary interval A 19 in FIG. 4 b is set to 0 and the shaft members 15 of the position restricting members are brought into contact with each other and fixed with the fixed hardware 16 of the position restricting member. One end portion of the shaft member 15 of the member is used as a backing material-position-controlling shaft member 18 so as to also serve as the backing material of the inner backing joining guide 13, and FIG. 6B shows an arbitrary interval of FIG. 5B. A19 is set to 0, the shafts of the position restricting members are brought into contact with each other and fixed by the fixed metal 16 of the position restricting member, and one end of the shaft member 15 of the position restricting member is supported by the outer backing joining guide 14. Backing material combined position control shaft material that also serves as a material 8 and the optional space A19, which is a working space for both, is 0. Therefore, it is not possible to form the welded portion by arranging the backing material position control shaft 18 on the same side as the welded portion. A sufficient thickness corresponding to the thickness of the metal plate by welding the weld metal to the welding groove formed by the end portion of the metal plate having the interval B20 and one end portion of the backing material-use position regulating shaft member 18. Forming a welded portion.

  From the above, the welding joining method shown in FIGS. 1 and 2 obtained in view of (1) ensuring the workability and quality of welding and (2) giving priority to the economic efficiency of the entire construction is most effective. The combination of the conclusion and the specific welded structure shown in FIGS. 4 to 6 shows that the welded structure in the range corresponding to the ceiling corresponds to FIG. 6a and the floor or wall regardless of the cross-sectional shape. It can be said that the welded structure shown in FIG.

  However, in the shelter inner shell unit 2 such as an emergency exit tunnel with a narrow inner space, the welding connection in which the position restricting member is not arranged on the inner side as shown in FIG. Since it is conceivable that the effectiveness of the narrow inner space can be increased by adopting the structure, it is necessary to make an appropriate judgment.

Further, the end joint welded portion 10 of the outer welded portion 8 and the inner welded portion 9 is in a shelter having the welded joint structure shown in FIG. 4b in the range 7 corresponding to the ceiling and in FIG. 5a in the range 6 corresponding to the floor or wall. A detailed example of the joint 3 of the shell units 2a and 2b is shown in FIG.

FIG. 7b shows the welded portion after welding is performed on the welding groove formed by the metal plate 1 and the inner and outer backing joint guides having an arbitrary interval B20 of FIG. The end joint welded portion 10 of the outer welded portion 8 and the inner welded portion 9 shown in the figure is an important part, and the welded portion applied to the joined portion is not interrupted by forming the end joined welded portion. Therefore, it is possible to ensure high durability, complete moisture-proof and waterproof properties, and electromagnetic shielding properties, which are the problems of the present invention.

  As mentioned above, about the welding joining method and welded joint structure of the shelter inner shell unit of the present invention, the welded joint method and welded joint structure can be applied to a basement that can be used as a so-called shelter and other steel structures. Can do.

DESCRIPTION OF SYMBOLS 1 Metal plate 2, 2a, 2b Shelter inner shell unit 3 Junction part 4 Outer welding range 5 Inner welding range 6 Floor to wall range 6a Floor equivalent 6b Wall equivalent range 7 Ceiling Corresponding range 8 Outer welded portion 9 Inner welded portion 10 End welded portion 11 between outer welded portion and inner welded portion 11 Horizontal to vertical tilt angle 12 Tilt angle exceeding vertical 13 Inner back joint joint guide 14 Outer back joint joint guide 15 Shaft material for position restricting member 16 Fixed metal fitting for position restricting member 17 Fixed metal fitting with spacer for position restricting member 18 Backing material and position restricting shaft material 19 Arbitrary spacing A
20 Arbitrary spacing B

Claims (14)

  It is a welding joining method between shelter inner shell units which are horizontal cylindrical bodies made of metal plates, and the welding joining method includes an outer welded portion that welds a joined portion between units from the outside of the unit, and an inner side of the unit. Welding is divided into the inner welded part to be welded, and the end parts of the outer welded part and the inner welded part are welded together to form a ring that is uninterrupted and joined. Shelter inner shell unit welding joining method.   In the welding joining method, a range having a horizontal or vertical inclination angle of the joint is welded from the inside of the unit to be an inner welded portion, and a range having an inclination angle exceeding the vertical is welded from the outside of the unit to be an outer welded portion. The shelter inner shell unit welding joining method according to claim 1, wherein:   The welding joining method is characterized in that a range corresponding to the floor or wall of the joint is welded from the inside of the unit to be an inner welded portion, and a range corresponding to the ceiling is welded from the outside of the unit to be an outer welded portion. The shelter inner shell unit welding joining method according to claim 1.   The outer welded portion is characterized in that a position regulating member is provided at the joint portion to set an arbitrary interval between the units, and an inner backing joint guide is provided inside the unit to form an outer welded portion. The shelter inner shell unit welding joining method according to claim 1.   The inner welded portion is characterized in that a position regulating member is provided at the joint portion to set an arbitrary interval between the units, and an outer backing joint guide is provided outside the unit to form the inner welded portion. The shelter inner shell unit welding joining method according to claim 1.   It welds using the position control member which consists of the shaft material integrally formed with the metal plate in the arbitrary positions of each other unit, and the spacer fixed metal fitting interposed between the shaft materials. The shelter inner shell unit welding joining method according to claim 4.   6. The shelter inner shell unit welding joining method according to claim 4, wherein welding is performed using a position regulating member that also serves as a backing material.   A welded joint structure between shelter inner shell units that are horizontal cylindrical bodies made of metal plates, the welded joint structure comprising an outer welded portion welded from the outside of the unit and an inner welded welded from the inside of the unit A shelter inner shell unit welded joint structure characterized in that the outer welded portion and the inner welded portion are joined and welded to form an annular shape in which welding of the unit joined portion is not interrupted.   The welded joint structure includes an inner welded portion in which a range having a horizontal or vertical inclination angle of the joint portion is welded from the inside of the unit, and an outer welded portion in which a range having an inclination angle exceeding the vertical is welded from the outside of the unit. The shelter inner shell unit welded joint structure according to claim 8, wherein:   The welded joint structure includes an inner welded portion in which a floor or a wall of the joined portion is welded from the inside of the unit, and an outer welded portion in which a range corresponding to the ceiling is welded from the outside of the unit. The described shelter inner shell unit welded joint structure.   The outer welded portion is provided with a position regulating member for setting an arbitrary interval between the units, and an inner backing joining guide for forming the outer welded portion inside the unit. The shelter inner shell unit welded joint structure according to claim 8.   The inner welded portion is provided with a position restricting member for setting an arbitrary interval between the units and an outer backing joining guide for forming the inner welded portion on the outer side of the unit. The shelter inner shell unit welded joint structure according to claim 8.   12. A position restricting member comprising a shaft member integrally formed with a metal plate at an arbitrary position of each unit and a spacer fixing metal member interposed between the shaft members is formed. The shelter inner shell unit welded joint structure according to any one of Items 12 to 12.   The shelter inner shell unit welded joint structure according to claim 11, wherein a position restricting member that also serves as a backing material is formed.