JPH07267183A - Device and method for automatically manufacturing intersection type structure, intersection type structure by the automatic manufacture, method of using the structure by the automatic manufacture, and device and method for automatically manufacturing steel ladder for ship - Google Patents

Abstract

PURPOSE:To prevent the occurrence of defective welding of a joint between a steel frame body and a steel step material and prevent reduction of the number of using years owing to corrosion by a method wherein the protrusion of the end part of one member is inserted in the opening of the other member. the insertion part is automatically welded and fixed. CONSTITUTION:The protrusion of the end part of the step material 2 made of a steel of one member the end part of which is processed by an automating end processing exclusive use machine is inserted in the opening, punched by a hydraulic puncher, of the frame body 1 made of a steel of the other member. Thereafter, the part is automatically arc-welded and fixed. Otherwise, the part is automatically welded and fixed by using an arc weld robot. Further, a running frame, a frame material 1, a fixing device, a punching device, a step 2, a feeding device, a weld positioner, and a weld robot are used. The punching device, the step 2, and the feeding device are mounted on the running frame and moved to a specific position. Since positioning precision of + or -0.5mm is ensured, a servo motor is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross structure automatic manufacturing apparatus, a cross structure automatic manufacturing method, a cross structure using the cross structure automatic manufacturing method, and a cross structure using the cross structure automatic manufacturing method. The present invention relates to a method of using a structure, an automatic copper ladder manufacturing apparatus for a ship, and an automatic steel ladder manufacturing method for a ship.

[0002]

2. Description of the Related Art Conventionally, since general welding work is manual work, it is difficult to manage the work, and it is important in work management to divide the work into areas where skill is required and areas where it is not necessary. It was a good job. Skilled and diverse work requires a skilled person, but if the person suitable for the work cannot be assigned, the work will be delayed and the work schedule will be distorted. Therefore, an expert is indispensable. However, in recent years, the number of welding technicians is declining overall, and there is an urgent need to train young welding technicians, but it is too late and the welding work tends to depend on elderly welding technicians. Met. Inevitably, this causes an absolute shortage of welding technicians sooner or later. In particular, in the manufacture of ships, arc welding work is one of the extremely important works, and since there are many work targets and the work contents are complicated, there are very many works by skilled welding technicians. This kind of thing cannot be continued forever, and some appropriate measures are needed. Therefore, among the manual welding work, the places that can be automatically welded using the arc welding robot are automatically welded, and even if the manual welding work is continued for some reason, , Automation of welding work has become a problem faced.

[0003]

In the conventional steel ladder for ships, however, there is a change in structure such as a joint between the steel frame and the steel step material, poor welding, or corrosion due to long-term use. It can become unusable and the crew may face unexpected accidents. The first object of the present invention is to solve these problems. Further, in the past, since the through holes of the steel frame body were opened by gas fusing, it is difficult to unify the diameters of the many through holes of the steel frame body, even if the machining accuracy of the steel step material is improved. However, unless the diameters of the through holes of the steel frame body to be connected are unified, it cannot be a highly accurate product. The second object of the present invention is to solve these problems. Further, in the past, the through hole of the copper frame was opened by gas fusing, but the present invention is a steel in which the structure of the inner peripheral surface portion of the opening with high processing accuracy is uniform by opening with a hydraulic puncher. A third object is to provide a through hole for the frame body. Further, conventionally, since the diameter of the step material fitted into the through hole of the steel frame body is the same, when the step material is fitted into the through hole of the steel frame body and joined, the through hole is formed. There was a risk that the end of the step material would penetrate. A fourth object of the present invention is to form a step structure in which a step portion is formed and an end portion of the step material can be locked at a desired position of the through hole of the steel frame body.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a protrusion at an end portion of another member is inserted into an opening of one member and the portion is automatically welded and fixed so that the one member and the other member are fixed. The present invention relates to an automatic cross structure manufacturing apparatus capable of automatically manufacturing a cross structure with the above member. Further, the present invention firstly provides an opening of one member with a projection at an end of the other member. Then, the portion was automatically welded and fixed, and a cross-type welded structure of the one member and the projection at the end of the other member was automatically manufactured. The present invention is a method for automatically manufacturing a crossed structure, wherein the present invention inserts a projection at the end of the other member into the opening of one member, and automatically welds and fixes the portion to the one member. And the other member are made into a cross type structure and automatically made into a cross type structure. A cross-type structure according to a method for automatically manufacturing a cross-type structure so as to obtain a difference-type structure, and the present invention is to insert a protrusion at the end of the other member into the opening of one member, Are automatically welded and fixed to each other, and the one member and the other member are formed into a cross-type structure to automatically manufacture the cross-type structure, and the cross-type structure is obtained. According to the automatic production method for a cross-type structure, the cross-type welded structure is provided with step portions continuously arranged at desired intervals in the longitudinal direction of the steel frame body so that it can be used as a ladder-like cross-type structure. The present invention is a method of using a cross type structure, and the present invention inserts a projection at the end of the steel step material of the other member into the opening of the steel frame body of the one member, and automatically inserts that portion. The steel frame body of the one member and the other member are fixed by arc welding. A marine steel ladder automatic manufacturing apparatus capable of automatically manufacturing a marine steel ladder of a cross-type welded structure with a projection at the end of a steel step material, and the present invention is also directed to Insert the protrusion of the end of the steel step material of the other member into the opening of the steel frame of the member of, and then automatically arc weld the part and fix it, This is an automatic method for manufacturing a marine steel ladder, which is capable of automatically manufacturing a marine steel ladder having a cross-type welded structure of a frame body and a projection at an end of a steel step material of the other member.

[0005]

According to the present invention, the projection of the end portion of the other member is inserted into the opening of the one member, and the portion is automatically welded and fixed, and the cross type of the one member and the other member is formed. Since it is a cross type automatic structure manufacturing device that can automatically manufacture a structure, insert a projection at the end of the other member into the opening of one member and automatically weld that part. Stuck,
A cross type structure of the one member and the other member can be automatically manufactured. Further, according to the present invention, first, the protrusion of the end portion of the other member is inserted into the opening of the one member, and then that portion is automatically welded and fixed, and the one member and the other member are fixed. Since it is an automatic manufacturing method for a cross-type structure that can automatically manufacture a cross-type welded structure with a projection at the end of, the projection of the end of the other member is first formed in the opening of one member. After the insertion, the part is automatically welded and fixed, and a cross-type welded structure of the one member and the projection at the end of the other member can be automatically manufactured. Further, according to the present invention, a protrusion at an end portion of the other member is inserted into an opening of one member, the portion is automatically welded and fixed, and the one member and the other member are cross-type structure. Since the cross-type structure is automatically manufactured into the cross-type structure and the cross-type structure is obtained by the cross-type structure, the cross-type structure is manufactured by the automatic cross-type structure manufacturing method. It is possible to insert a protrusion at the end of the member and automatically weld and fix the portion to form a cross type structure in which the one member and the other member have a cross type structure. Further, according to the present invention, a protrusion at an end portion of the other member is inserted into an opening of one member, the portion is automatically welded and fixed, and the one member and the other member are cross-type structure. Then, the cross type structure is automatically manufactured to obtain a cross type structure by the cross type structure, and the cross type welded structure is stepped at a desired interval in the longitudinal direction of the steel frame body. Are connected to each other and used as a ladder-shaped cross-type structure. This is a method of using the cross-type structure by an automatic manufacturing method of the cross-type structure. Insert the protrusion, and weld and fix the part automatically.The one member and the other member are made into a cross type structure, and are automatically manufactured as a cross type structure. To obtain a die-shaped structure, the cross-type welded structure is Longitudinally and continuously provided a step portion taking the desired spacing may be used as a ladder-like crossover structure. Further, the present invention, the protrusion of the end portion of the steel step material of the other member is inserted into the opening of the steel frame body of the one member, and the portion is automatically arc-welded and fixed, Automatic marine steel ladder manufacturing apparatus capable of automatically manufacturing a marine steel ladder having a cross type welded structure of a steel frame body of a member and a projection of an end of a steel step material of the other member Therefore, the projection of the end of the steel step material of the other member is inserted into the opening of the copper frame of the one member, and that portion is automatically arc welded and fixed, and the steel of the one member is fixed. It is possible to automatically manufacture a marine steel ladder having a cross-type welded structure of the frame body and the projection of the end of the steel step material of the other member. Further, the present invention, the projection of the end portion of the steel step material of the other member is inserted into the opening of the steel frame body of the one member, and the portion is automatically arc welded and fixed to the one member. It is possible to automatically manufacture a marine steel ladder having a cross type welded structure of the steel frame body and the projection of the end of the steel step material of the other member. Further, the present invention, the protrusion of the end of the steel step material of the other member is inserted into the opening of the steel frame body of one member, and then that portion is automatically arc-welded and fixed, A marine steel ladder capable of automatically producing a marine steel ladder having a cross-type welded structure of the steel frame body of the one member and the projection of the end of the steel step material of the other member Since it is an automatic manufacturing method, insert the projection of the end of the copper step material of the other member into the opening of the steel frame of the one member, and then automatically weld the part and fix it It is possible to automatically manufacture a marine steel ladder of a cross-type welded structure of the steel frame body of the member and the projection of the end of the steel step material of the other member.

[0006]

Embodiment 1 The present invention is the end of the steel step material of the other member that is end-processed by the automatic end-processing dedicated machine in the opening of the steel frame body of one member opened by the hydraulic puncher. Cross-welding structure of the steel frame of the one member and the projection of the end of the steel step material of the other member by automatically arc-welding and fixing the part. It is an automatic manufacturing apparatus for marine steel ladders capable of automatically manufacturing body marine steel ladders.

[0007]

[Embodiment 2] The present invention relates to the end of the steel step material of the other member which is end-processed by the automatic end-processing dedicated machine in the opening of the steel frame body of the one member opened by the hydraulic puncher. Insert the projection of the part, and automatically weld and fix the part using an arc welding robot, and project the end of the steel frame of the one member and the steel step material of the other member. Is a marine steel ladder automatic manufacturing apparatus capable of automatically manufacturing a marine steel ladder having a cross-type welded structure with the.

[0008]

[Third Embodiment] In the present invention, first, a steel step material of the other member, which is end-processed by an automated end-dedicated machine, is formed in the opening of the steel frame body of one member opened by the hydraulic puncher. The projection of the end portion of the, then, the portion is automatically arc-welded and fixed, the steel frame body of the one member and the projection of the end portion of the steel step material of the other member. Is a marine steel ladder automatic manufacturing method capable of automatically manufacturing a marine steel ladder having a crossed welded structure.

[0009]

[Embodiment 4] In the present invention, first, a steel step material of one member opened by a hydraulic puncher, and a steel step material of the other member end-processed by an automated end-processing machine at the opening of the steel frame Insert the projection at the end of the, then automatically weld and fix the part using an arc welding robot, the steel frame body of the one member and the steel step material of the other member. Is a marine steel ladder automatic manufacturing method capable of automatically manufacturing a marine steel ladder having a cross-type welded structure with a projection at the end of the.

[0010]

[Embodiment 5] The present invention comprises a part manufacturing process and an automatic manufacturing process. The part manufacturing process is a process of manufacturing a finished part from a carry-in material that has been carried in in advance. It is possible to perform the part manufacturing process with a cutting device for cutting into parts and a step end stepped processing device for stepped processing of the step end, and the automatic manufacturing process supplies the parts and the assembly jig device automatically It is a process of assembling and performing automatic welding with an automatic welding robot, which can be performed automatically by a traveling frame, a frame material fixing device, a drilling device, a step supply device, a welding positioner, and a welding robot. This is the method for automatically manufacturing a marine steel ladder.

[0011]

[Embodiment 6] According to the present invention, in order to automatically manufacture a marine steel ladder, the parts thereof are supplied, automatically assembled by an assembly jig device, and automatically welded by an automatic welding robot. , The automatic production of the marine steel ladder is constituted by a traveling mount, a frame material fixing device, a drilling device, a step feeding device, a welding positioner and a welding robot, and the traveling mount has a drilling device and a step feeding device. Is mounted so that it can be moved to a predetermined position, and the positioning accuracy is ± 0.5 m.
In order to secure m, a servo motor is used, and the frame material fixing device allows the two frame materials to be positioned by a step motor with a hydraulic vise structure so that the frame material can be positioned by a step motor. In order to carry out the completed steel ladder while carrying in the position, the drilling device makes a hole for step insertion on the frame material by the portable hydraulic puncher, and the positioning of the drilling is performed by the traveling platform. Movement and vertical movement by a step motor so that positioning can be performed, and in order to make a hole for step insertion in the frame material by the hydraulic puncher, the hydraulic puncher is moved together with the movement of the hydraulic puncher to the drilling position of the two frame materials. The step feeding device also has a function of rotating 180 degrees to change the punching posture for step insertion into the frame material of the hydraulic puncher. It has a payout function and a step material insertion function into the frame material.The positioning of the step insertion into the frame material is made possible by the movement by the traveling frame and the vertical movement by the step motor, and the insertion is paid out. It has the function of grasping the step material with a hand and inserting the step material into the through hole of the frame material for step insertion.The welding positioner has a welding positioner body that moves up to the length of the assembled steel ladder. The welding robot is a 6-axis articulated robot and cooperates with a traveling device having a stroke of 2 m as an external axis so that the steel ladder can be held in a welding posture by rotating it by ± 90 degrees. This is a ship steel automatic ladder manufacturing device that can be controlled.

[0012]

[Embodiment 7] In welding for assembling a steel ladder, a step material is inserted into a through hole of a frame material, and first, tack welding is performed from the outside. In this state, the weight of the step material is reduced. Cantilevered only by tack welding, and the welding strength that does not allow the step portion to hang down is required, and tack welding of all step materials is performed, and the assembled steel ladder is clamped by the welding positioner during the next assembly. When welding is performed, the welding strength is set so that it will not disassemble, and then the main welding is performed.However, in order to ensure that the joint is fully melted, the welding route is appropriately selected and the system control panel is switched to the robot control panel. This is an automatic method for manufacturing a marine steel ladder that can be instructed.

[0003]

[Embodiment 8] The step material is inserted into the through hole of the frame material, one step material at a time, into one of the frame material through holes, and the portion is temporarily welded. After the end,
This is an automatic method for manufacturing a marine steel ladder in which the remaining other frame member and the assembly portion are tack-welded to adapt to changing the step pitch.

According to the present invention, the projection of the end portion of the other member is inserted into the opening of the one member, and the portion is automatically welded and fixed, and the cross type of the one member and the other member is formed. Since it is a cross type automatic structure manufacturing device that can automatically manufacture a structure, insert a projection at the end of the other member into the opening of one member and automatically weld that part. Stuck,
There is an effect that a cross structure of the one member and the other member can be automatically manufactured. In addition, the present invention, first,
Insert the protrusion at the end of the other member into the opening of one member,
Next, the portion is automatically welded and fixed so that a cross-type welded structure of the one member and the projection at the end of the other member can be automatically manufactured. Since it is an automatic manufacturing method, first, insert the projection of the end portion of the other member into the opening of the one member, and then automatically weld and fix the portion, and the one member and the other member There is an effect that a cross-type welded structure with a projection at the end of the member can be automatically manufactured. Further, according to the present invention, a protrusion at an end portion of the other member is inserted into an opening of one member, the portion is automatically welded and fixed, and the one member and the other member are cross-type structure. Since the cross-type structure is automatically manufactured into the cross-type structure and the cross-type structure is obtained by the cross-type structure, the cross-type structure is manufactured by the automatic cross-type structure manufacturing method. There is an effect that a protrusion at the end portion of the member is inserted and the portion is automatically welded and fixed to form a cross type structure in which the one member and the other member have a cross type structure. Further, according to the present invention, a protrusion at an end portion of the other member is inserted into an opening of one member, the portion is automatically welded and fixed, and the one member and the other member are cross-type structure. Then, the cross type structure is automatically manufactured to obtain a cross type structure by the cross type structure, and the cross type welded structure is stepped at a desired interval in the longitudinal direction of the steel frame body. Are connected to each other and used as a ladder-shaped cross-type structure. This is a method of using the cross-type structure by an automatic manufacturing method of the cross-type structure. Insert the protrusion, and weld and fix the part automatically.The one member and the other member are made into a cross type structure, and are automatically manufactured as a cross type structure. To obtain a die-shaped structure, the cross-type welded structure is Longitudinally and continuously provided a step portion taking the desired spacing, the effect that can be used as a ladder-like crossover structure. Further, the present invention, the protrusion of the end portion of the steel step material of the other member is inserted into the opening of the steel frame body of one member, and the portion is automatically arc welded and fixed,
A marine steel ladder capable of automatically manufacturing a marine steel ladder having a cross-welding structure of a steel frame body of the one member and a projection of an end portion of the steel step material of the other member Since it is an automatic manufacturing device, the protrusion of the end of the steel step material of the other member is inserted into the opening of the steel frame of the one member, and that portion is automatically arc-welded and fixed. There is an effect that it is possible to automatically manufacture a marine steel ladder of a cross-type welded structure of the steel frame body of the above member and the projection of the end of the steel step material of the other member. Further, the present invention, the projection of the end portion of the steel step material of the other member is inserted into the opening of the steel frame body of the one member, and the portion is automatically arc welded and fixed to the one member. There is an effect that it is possible to automatically manufacture a marine steel ladder having a cross-type welded structure of the steel frame body and the projection of the end of the steel step material of the other member. Further, the present invention, the protrusion of the end of the steel step material of the other member is inserted into the opening of the steel frame body of one member, and then that portion is automatically arc-welded and fixed, A marine steel ladder capable of automatically manufacturing a marine steel ladder having a cross-welding structure of a steel frame body of the one member and a projection of an end portion of the steel step material of the other member Since it is an automatic manufacturing method, insert the projection of the end part of the copper step material of the other member into the opening of the copper frame body of one member, and then that part is automatically arc-welded and fixed. There is an effect that a marine steel ladder having an intersecting welded structure of the steel frame body of the member and the projection of the end of the steel step material of the other member can be automatically manufactured. In addition, the step processing of the projection portion at the end of the step material, which is one of the parts supplied to the ship steel automatic ladder manufacturing apparatus according to the present invention, can be processed by a step processing dedicated machine. The effect that the step processing can be performed by cutting by adding the step processing device to the lathe which has been used in the past, instead of using the step processing only machine.

[Brief description of drawings]

FIG. 1 is a plan view of a marine steel ladder in which a projection at an end portion of a step material is inserted into an opening of a frame body according to the present invention and the portion is automatically welded and fixed.

FIG. 2 is a main part of a marine steel ladder in which a projection at an end of a step material is inserted into an opening of a frame body to which the present invention is applied and which is automatically welded and fixed. FIG. 4 is an enlarged cross-sectional view of a main part of a marine steel ladder showing a related configuration of a frame and a step material.

[Explanation of symbols]

1 Frame 2 Step material 3 Opening edge that forms the opening of the frame 4 Shoulder of the end of the step material 5 Automatic arc welding part 6 Protrusion of the end of the step material

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Michio Taisei 1-5 Kyobashi, Chuo-ku, Tokyo Inside Kikushima Dock Co., Ltd. (72) Inventor Tetsuya Yamauchi 1-1-5 Kyobashi, Chuo-ku, Tokyo No. Stock Company Shin Kurushima Dock (54) [Title of Invention] Automatic cross-type structure manufacturing device and cross-type structure automatic manufacturing method and cross-type structure automatic cross-type structure manufacturing method and cross-type structure How to use cross type structure by automatic body manufacturing method, automatic steel steel ladder manufacturing equipment and automatic steel steel ladder manufacturing method

Claims (34)

[Claims] 1. A cross-type structure body in which the projection of the end portion of the other member is inserted into the opening of the one member, and the portion is automatically welded and fixed, and the one member and the other member are fixed to each other. Automatic structure manufacturing system for cross type structure that can automatically manufacture. 2. One member is opened, the end of the other member is formed into a projection having a size that can be inserted into the opening of the one member, and the end of the other member is inserted into the opening of the one member. The projection of the one member and the projection of the end portion of the other member are fixed to each other by automatic welding means to automatically form a cross type structure of the one member and the other member. The automatic crossing structure manufacturing apparatus according to claim 1, wherein the apparatus is capable of being manufactured. 3. A protrusion at the end of the other member, which has been end-processed by an automated end-processing machine, is inserted into the opening of one member opened by a hydraulic puncher, and that portion is automatically welded. The automatic cross-type structure manufacturing apparatus according to claim 1, wherein the cross-type structure of the one member and the other member can be automatically manufactured by fixing them. 4. One of the members opened by a hydraulic puncher can be opened, and the end of the other member machined by an automated machine for machining the end can be inserted into the opening of the one member. A projection of a size, insert the projection of the end of the other member into the opening of the one member, and fix the opening of the one member and the projection of the end of the other member by automatic welding means. ,
The automatic cross structure manufacturing apparatus according to claim 1, wherein a cross structure of the one member and the other member can be automatically manufactured. 5. First, the projection of the end portion of the other member is inserted into the opening of the one member, and then that portion is automatically welded and fixed to fix the one member and the other member. 2. The method for automatically manufacturing a cross type structure according to claim 1, wherein a cross type welded structure with a projection at an end portion can be automatically manufactured. 6. First, one member is opened, then the end of the other member is formed into a projection having a size that can be inserted into the opening of the one member, and then the opening of the one member. Insert the projection of the end of the other member into the, then, the opening of the one member and the projection of the end of the other member are welded and fixed by an automatic welding machine or the like, the one member 2. The method for automatically manufacturing a cross type structure according to claim 1, wherein a cross type structure having an intersection between the opening and the projection at the end of the other member can be automatically manufactured. 7. First, the projection of the end of the other member, which has been end-processed by an automated end-processing machine, is inserted into the opening of the one member opened by the hydraulic puncher, and then that part is inserted. 2. The cross type structure according to claim 1, wherein the cross type welded structure of the one member and the projection at the end portion of the other member can be automatically produced by automatically welding and fixing. Automatic production method. 8. First, one of the members opened by a hydraulic puncher is opened, and then the end of the other member processed by an automated machine for processing the end is connected to the end of the one member. A protrusion having a size that can be inserted into the opening, then insert the protrusion at the end of the other member into the opening of the one member, and then
The opening of the one member and the projection of the end portion of the other member are welded and fixed by an automatic welding machine or the like, and the intersection of the opening of the one member and the projection of the end portion of the other member is formed. The cross structure having the above structure can be automatically manufactured.
A method for automatically manufacturing a crossing structure as described. 9. First, the end portion of the other member is formed into a projection having a size that can be inserted into the opening of the one member, then the one member is opened, and then the opening of the one member is formed. Insert the projection of the end of the other member into the, then, the opening of the one member and the projection of the end of the other member are welded and fixed by an automatic welding machine or the like, the one member 2. The method for automatically manufacturing a cross type structure according to claim 1, wherein a cross type structure having an intersection between the opening and the projection at the end of the other member can be automatically manufactured. 10. A protrusion of an end portion of another member is inserted into an opening of one member and the portion is automatically welded and fixed to each other so that the one member and the other member have a cross structure. 2. The cross structure according to claim 1, wherein the cross structure is automatically manufactured to obtain a cross structure by the cross structure. 11. A projection of an end portion of a step member of a round bar of the other member is inserted into an opening of a frame body of one member facing each other, and the portion is automatically welded and fixed, In order to obtain a cross-type structure, automatically manufacturing the one member and the other member in a cross-type structure into a cross-type structure,
2. The crossing method according to claim 1, wherein the crossing type structure is provided with step portions continuously arranged at desired intervals in the longitudinal direction of the frame body so as to be used as a metal ladder for a ship. Type structure. 12. A protrusion of an end portion of a step material of a round bar of the other member is inserted into an opening of a frame body of one member facing each other, and the portion is automatically welded and fixed, In order to obtain a cross-type structure, automatically manufacturing the one member and the other member in a cross-type structure into a cross-type structure,
2. The crossing method according to claim 1, wherein the crossing type structure is provided with step portions continuously arranged at desired intervals in the longitudinal direction of the frame body so as to be used as a metal ladder for a ship. Type structure. 13. A projection of an end portion of a step material of a steel round bar of the other member is inserted into an opening of a copper frame body of the one member facing each other, and the intersecting portion is automatically welded. Then, the steel frame body of the one member and the step member of the steel round bar of the other member are automatically made into a cross-type welding structure to form a cross-type welding structure. In order to obtain the cross-welded structure, the step portions of the steel round bars are continuously provided at a desired interval in the longitudinal direction of the steel frame body so that they can be used as a metal ladder for ships. A cross type structure manufactured by the method for automatically manufacturing a cross type structure according to item 1. 14. A projection of an end portion of a step material of a steel round cylinder of the other member is inserted into an opening of a steel frame body of the one member facing each other, and the intersecting portion is automatically welded. Then, the steel frame body of the one member and the step material of the steel round cylinder of the other member are automatically made into a cross-type welding structure to form a cross-type welding structure. A body is obtained, and the crossed welded structure is provided with a step portion of a steel round cylinder continuously provided at a desired interval in the longitudinal direction of the copper frame body so that it can be used as a metal ladder for ships. A cross type structure manufactured by the method for automatically manufacturing a cross type structure according to item 1. 15. A projection at an end of a step material of a steel square bar of another member is inserted into an opening of a steel frame body of one member which is opposed to each other, and the intersection is automatically welded. Then, the steel frame body of the one member and the step member of the steel square rod of the other member are automatically made into a cross-type welding structure to form a cross-type welding structure. In order to obtain a body, the cross-type welded structure is provided with step portions of steel square bars continuously arranged at desired intervals in the longitudinal direction of the steel frame body so that it can be used as a metal ladder for ships. A cross structure according to the automatic cross structure manufacturing method according to claim 1. 16. A projection of an end portion of a step member of a steel square tube of the other member is inserted into an opening of a steel frame body of the other member, which is opposed to each other, and the intersecting portion is automatically welded. Then, the steel frame body of the one member and the step member of the steel square tube of the other member are automatically made into a cross-type welding structure to form a cross-type welding structure. The body is obtained, and the cross-type welded structure is provided with the step portions of the steel square cylinders continuously arranged at desired intervals in the longitudinal direction of the steel frame body so that it can be used as a metal ladder for ships. A cross structure according to the automatic cross structure manufacturing method according to claim 1. 17. A protrusion of an end portion of another member is inserted into an opening of one member, and the portion is automatically welded and fixed to each other so that the one member and the other member have a cross structure. Automatically produce a cross-type structure to obtain a cross-type structure by the cross-type structure, and form the cross-type welded structure at desired intervals in the longitudinal direction of the steel frame to form step parts. The method for using a cross type structure according to the automatic method for manufacturing a cross type structure according to claim 1, wherein the cross type structures are arranged in series and can be used as a ladder-shaped cross type structure. 18. A protrusion of an end portion of another member is inserted into an opening of one member, and the portion is automatically welded and fixed to each other so that the one member and the other member have a cross structure. Automatically produce a cross-type structure to obtain a cross-type structure by the cross-type structure, and form the cross-type welded structure at desired intervals in the longitudinal direction of the steel frame to form step parts. The method of using a cross type structure according to claim 1, wherein the cross type structures are arranged in series and can be used as a ladder. 19. A projection of an end portion of a step member of a copper round bar of another member is inserted into an opening of a steel frame body of one member which is opposed to each other, and the intersecting portion is automatically welded. Then, the steel frame body of the one member and the step member of the steel round bar of the other member are automatically made into a cross-type welding structure to form a cross-type welding structure. And a step portion of the copper round bar is continuously provided at a desired interval in the longitudinal direction of the steel frame body so that the cross welded structure can be used as a metal ladder for ships. A method of using a crossing structure by the method for automatically manufacturing a crossing structure according to 1. 20. A projection of an end portion of a step member of a steel round cylinder of the other member is inserted into an opening of a steel frame body of the other member which is opposed to each other, and the intersection is automatically welded. Then, the copper frame body of the one member and the step member of the steel round cylinder of the other member are automatically formed into a cross type welding structure in a cross type structure, and the cross type welding structure is formed. The cross-type welded structure is obtained by continuously connecting step portions of a steel round cylinder at desired intervals in the longitudinal direction of the steel frame body so that it can be used as a metal ladder for ships. Item 2. A method of using a cross structure according to the automatic cross structure manufacturing method according to Item 1. 21. A projection of an end portion of a step material of a steel square bar of another member is inserted into an opening of a steel frame body of one member facing each other, and the intersecting portion is automatically welded. Then, the steel frame body of the one member and the step member of the steel square rod of the other member are automatically made into a cross-type welding structure to form a cross-type welding structure. In order to obtain a body, the cross-type welded structure is provided with step portions of steel square bars continuously arranged at desired intervals in the longitudinal direction of the steel frame body so that it can be used as a metal ladder for ships. A method of using a cross structure according to the automatic cross structure manufacturing method according to claim 1. 22. A projection of an end portion of a step member of a steel square tube of the other member is inserted into an opening of a steel frame body of the one member facing each other, and the intersection is automatically welded. Then, the copper frame body of the one member and the step material of the steel square cylinder of the other member are automatically made into a cross type welding structure to form a cross type welding structure. And a step portion of the steel square tube is continuously provided at a desired interval in the longitudinal direction of the steel frame body so that the cross welded structure can be used as a metal ladder for a ship. Item 2. A method of using a cross structure according to the automatic cross structure manufacturing method according to Item 1. 23. The protrusion of the end of the steel step material of the other member is inserted into the opening of the copper frame of the one member, and the portion is automatically welded and fixed to obtain the steel of the one member. 2. The automatic marine steel ladder manufacturing apparatus according to claim 1, which is capable of automatically manufacturing a marine steel ladder having a cross-type welded structure of a frame body and a projection of an end of a steel step material of the other member. 24. A steel frame body of one member is opened, and an end portion of a steel step material of the other member is formed into a projection having a size that can be inserted into the opening of the steel frame body of the one member. , The projection of the end portion of the steel step material of the other member is inserted into the opening of the steel frame body of the one member, and the opening of the steel frame body of the one member and the steel of the other member are made. By fixing the projections at the end of the step material by automatic welding means, the marine steel ladder of the cross-welded structure of the steel frame body of the one member and the copper step material of the other member is automatically 2. The automatic ship steel ladder manufacturing apparatus according to claim 1, which is capable of being manufactured. 25. First, the projection of the end of the steel step material of the other member is inserted into the opening of the steel frame body of one member, and then that portion is automatically welded and fixed, The marine steel ladder of a cross-type welded structure of a steel frame body of the one member and a projection of an end portion of the steel step material of the other member can be automatically produced. Automatic production method for marine steel ladders. 26. First, opening the steel frame body of one member,
The end of the steel step material of the other member is formed into a protrusion having a size that can be inserted into the opening of the steel frame body of the one member, and then the opening is formed in the opening of the steel frame body of the one member. Insert the projection of the end of the steel step material of the other member, and then automatically weld the opening of the steel frame of the one member and the projection of the end of the steel step material of the other member. 2. A marine steel ladder having an intersecting welded structure of the steel frame body of the one member and the steel step material of the other member can be automatically manufactured by fixing the steel frame body of the one member. Automatic production method for marine steel ladders. 27. A projection of an end portion of a steel step material of another member is inserted into an opening of a steel frame body of one member, and the portion is automatically arc welded and fixed to fix the one member. 2. The automatic marine steel ladder manufacturing apparatus according to claim 1, wherein a marine ladder having a cross type welded structure of a steel frame body and a projection at the end of the steel step material of the other member can be automatically manufactured. 28. An end projection of a steel step material of another member is inserted into an opening of a steel frame body of one member, and that portion is automatically welded and fixed using an arc welding robot. 2. A marine steel ladder having an intersecting welded structure of a steel frame body of the one member and a projection of an end portion of a copper step material of the other member can be automatically manufactured. The automatic copper ladder manufacturing apparatus for marine vessels. 29. First, insert the projection of the end of the steel step material of the other member into the opening of the copper frame body of the one member, and then fix the portion by arc welding automatically. 2. A marine copper ladder having a cross-type welded structure of a steel frame body of the one member and a projection of an end portion of the steel step material of the other member can be automatically manufactured. Automatic production method for marine steel ladders. 30. First, insert the projection of the end of the steel step material of the other member into the opening of the steel frame body of the one member, and then, automatically insert that portion using an arc welding robot. It is possible to automatically manufacture a marine steel ladder of a cross-welding structure of the steel frame body of the one member and the projection of the end of the steel step material of the other member by welding The method for automatically manufacturing a marine steel ladder according to claim 1, wherein. 31. A projection of an end portion of a steel step material of the other member end-processed by an automated end-processing machine at an opening of a steel frame body of one member opened by a hydraulic puncher. Inserted, the portion is automatically arc-welded and fixed, and the marine steel of the cross-type welded structure of the steel frame body of the one member and the projection of the end of the steel step material of the other member 2. The automatic marine steel ladder manufacturing apparatus according to claim 1, wherein the ladder manufactured automatically can be manufactured automatically. 32. A projection of an end portion of a steel step material of the other member end-processed by an automated end-dedicated machine in an opening of a steel frame body of one member opened by a hydraulic puncher. Inserted, the part is automatically welded and fixed using an arc welding robot, and the cross type of the steel frame body of the one member and the projection of the end of the steel step material of the other member The ship steel automatic ladder manufacturing apparatus according to claim 1, wherein the ship steel ladder of the welded structure can be automatically manufactured. 33. First, an end portion of a steel step material of the other member, which is end-processed by an automatic end-dedicated machine, is formed in an opening of a steel frame body of one member opened by a hydraulic puncher. Inserting a protrusion, then automatically arc-welding and fixing the portion, the cross-type welding structure of the steel frame of the one member and the protrusion of the end of the copper step material of the other member The method for automatically manufacturing a marine steel ladder according to claim 1, wherein the marine steel ladder is automatically manufactured. 34. First, the end of the steel step material of the other member, which is end-processed by an automated end-processing machine, into the opening of the steel frame of one member opened by the hydraulic puncher. Insert the protrusion, and then automatically weld and fix the portion using an arc welding robot, and fix the steel frame body of the one member and the end portion of the steel step material of the other member. The method for automatically manufacturing a marine steel ladder according to claim 1, wherein a marine steel ladder having a cross-welding structure with a protrusion can be automatically manufactured.