JP2020153097A - Apparatus and method for manufacturing core structure of take-up shaft for shutter curtain - Google Patents

Abstract

To provide an apparatus and a method for manufacturing a core structure of a take-up shaft for a shutter curtain which is capable of automatically inserting a rod-like member constituting a take-up shaft into a center hole of a core member even when the rod-like member and the center hole are off-centered.SOLUTION: A core structure has a rod-like member 7 forming a shaft neck part of a take-up shaft, and a core member 11 arranged on the rod-like member 7 by inserting the rod-like member 7 into a center hole 11A of a center part. Among first holding means for holding the core member 11 and second holding means for holding the rod-like member, at least one holding means can advance to the other holding means for inserting the rod-like member into the center hole of the core member. A chamfered part 7A is provided on at least one of the outer peripheral part of the tip surface 7C of the rod-like member and the inner peripheral part of the end part on the side where the tip surface 7C of the center hole is inserted, and at least one of the first holding means and the second holding means relaxes the holding when the tip surface is inserted into the center hole.SELECTED DRAWING: Figure 13

Description

The present invention relates to an apparatus and a method for manufacturing a core structure for a winding shaft for freely winding a shutter curtain, for example, a shutter curtain that opens and closes an opening such as an entrance and exit, and a fully closed one. Therefore, it can be used to manufacture a core structure of a take-up shaft for a shutter curtain or the like forming a fireproof compartment.

Patent Document 1 below shows that a take-up shaft that winds up a shutter curtain freely is configured to include a core structure. This core structure has a rod-shaped member that forms a shaft neck portion at the axial end of the winding shaft for freely winding the shutter curtain, and a round hole in the central hole. By inserting a rod-shaped member formed of a rod, the rod-shaped member is placed on the rod-shaped member, and the outer peripheral portion is inside the round tubular member which is joined to the rod-shaped member by welding to form the main body of the take-up shaft. Is configured to include a core member coupled to the inner peripheral portion of the round tubular member.

Japanese Unexamined Patent Publication No. 2006-316442

Assembling and manufacturing the above core structure is performed manually by an operator, and the work for inserting the rod-shaped member into the central hole of the core member is also performed manually. In order to shorten the work time and improve the work efficiency, there is a need for a device and a method that can automatically perform the work for inserting the rod-shaped member into the central hole of the core member.

An object of the present invention is to automatically insert a rod-shaped member for a winding shaft for freely winding a shutter curtain into a center hole of a core member even if the rod-shaped member and the center hole are misaligned. It is an object of the present invention to provide an apparatus for manufacturing a core structure of a winding shaft for a shutter curtain and a method for manufacturing the same.

The apparatus for manufacturing the core structure of the winding shaft for a shutter curtain according to the present invention includes a rod-shaped member forming a shaft neck portion at the axial end of the winding shaft for freely winding the shutter curtain, and a center. By inserting the rod-shaped member formed of a round bar into the central hole provided in the portion with a round hole, the rod-shaped member is arranged in the rod-shaped member, and is joined to the rod-shaped member by welding to form the winding shaft. A core structure of a winding shaft for a shutter curtain, which includes a core member whose outer peripheral portion is coupled to the inner peripheral portion of the round tubular member inside the round tubular member forming the main body. It is an apparatus for manufacturing the above, and includes a first holding means for holding the core member and a second holding means for holding the rod-shaped member, and among these holding means, At least one of the holding means can advance toward the other holding means in order to insert the rod-shaped member into the central hole of the core member, and also with the outer peripheral portion of the tip surface of the rod-shaped member. A chamfered portion is provided on at least one of the inner peripheral portion of the end portion of the central hole on the side where the tip surface is inserted, and at least one of the first holding means and the second holding means is held. The means is characterized in that when the tip surface is inserted into the central hole, the holding is relaxed.

As described above, in the apparatus for manufacturing the core structure of the winding shaft for the shutter curtain according to the present invention, the outer peripheral portion of the tip surface of the rod-shaped member and the end portion of the central hole of the core member on the side where the tip surface is inserted. A chamfered portion is provided on at least one of the inner peripheral portions of the rod-shaped member, and the tip surface of the rod-shaped member of at least one of the first holding means and the second holding means is a core member. When the rod-shaped member is inserted into the center hole, the holding is relaxed. Therefore, when the tip surface of the rod-shaped member is inserted into the center hole of the core member, the rod-shaped member and the center hole are misaligned. Even if this occurs, at least one of the core member and the rod-shaped member can be moved in the inner and outer diameter directions to eliminate this misalignment, and the rod-shaped member can be inserted into the center hole of the core member as predetermined. This makes it possible to shorten the work time and improve the work efficiency.

In the above-described apparatus for manufacturing the core structure of the shutter curtain take-up shaft according to the present invention, in order to insert the rod-shaped member into the central hole of the core member, both the first holding means and the second holding means are used. It may be moved, or only one of the first holding means and the second holding means may be moved. Further, the state of relaxing the holding may be performed for both the first holding means and the second holding means, or only for one of the first holding means and the second holding means. You may go.

Further, in order to insert the rod-shaped member into the central hole of the core member, only one of the first holding means and the second holding means is moved, and the holding is relaxed. When only one of the first holding means and the second holding means is used, one of the holding means may be the same holding means, or may be different holding means from each other.

Further, in the above-described apparatus for manufacturing the core structure of the shutter curtain winding shaft according to the present invention, the number of core members arranged on the rod-shaped member may be one, or in the axial direction of the rod-shaped member. A plurality of them may be arranged at intervals.

Further, the holding structure of the first holding means for holding the core member and the holding structure of the second holding means for holding the rod-shaped member can hold and release the core member and the rod-shaped member. If there is, any form and form may be used. The first holding means of the example is a scroll chuck type holding means in which a plurality of claw members arranged in the circumferential direction of the core member are movable in the inner and outer diameter directions of the core member. The second holding means is also a scroll chuck type holding means in which a plurality of claw members arranged in the circumferential direction of the rod-shaped member are movable in the inner and outer diameter directions of the rod-shaped member. In addition to this, the first holding means and the second holding means are held around the entire circumference of the core member and the rod-shaped member, and the core member and the rod-shaped member are elastically held and released by air pressure or the like. It may be made of a type elastic member.

Further, as described above, the first holding means is a scroll chuck type holding in which a plurality of claw members arranged in the circumferential direction of the core member are movable in the inner and outer diameter directions of the core member. As a means, when the second holding means is also a scroll chuck type holding means in which a plurality of claw members arranged in the circumferential direction of the rod-shaped member are movable in the inner and outer diameter directions of the rod-shaped member. Of the first holding means for holding the core member and the second holding means for holding the rod-shaped member when the tip surface of the rod-shaped member is inserted into the central hole of the core member as described above. Bringing at least one of the holding means to a state in which the holding is relaxed means that the plurality of claw members of the scroll chuck type holding means are slightly moved in the outer diameter direction while maintaining the holding. It can be realized by.

Further, at least one of the first holding means for holding the core member and the second holding means for holding the rod-shaped member when the tip surface of the rod-shaped member is inserted into the central hole of the core member in this way. In the case where a plurality of claw members of the scroll chuck type holding means are slightly moved in the outer diameter direction while maintaining the holding in order to bring one holding means into a state in which the holding is relaxed. When the state in which the holding is relaxed is to be performed by the first holding means, the first holding in which the holding of the core member is relaxed is applied to each of the claw members of the second holding means. An elastic member for elastically pressing the core member may be attached to each claw member of the means.

According to this, when the claw member of the first holding means relaxes the holding of the core member, the elastic members attached to the claw members of the second holding means are the respective elastic members of the first holding means. Since the core member is elastically pressed against the claw member, even if the inner diameter of the central hole of the core member is slightly larger than the outer diameter of the rod-shaped member inserted into the center hole, the core member is rod-shaped. It can be placed upright on the member.

Then, an elastic member for elastically pressing the core member is attached to each claw member of the first holding means in which the holding of the core member is relaxed in this way. In this case, a recessed portion is provided at the tip of each claw member of the first holding means on the inner diameter side, the inner diameter side is open and the outer diameter side is closed, and the side opposite to the second holding means is recessed. By elastically pressing the core member against these recesses by the elastic members attached to the respective claw members of the second holding means, while maintaining the holding of the core member by the first holding means. It is possible to effectively realize both the relaxation of this holding and the arrangement of the core member in an upright state on the rod-shaped member.

Further, in the apparatus for manufacturing the core structure of the winding shaft for a shutter curtain according to the present invention, the elastic member elastically presses the recessed portion provided in each claw member of the first holding means. Welding means for spot welding the core member to the rod-shaped member may be provided.

According to this, after the core member is placed upright on the rod-shaped member, the core member can be positioned and connected to the rod-shaped member by spot welding by welding means.

Further, the apparatus for manufacturing the core structure of the winding shaft for the shutter curtain according to the present invention includes a third holding means for holding the rod-shaped member on which the core member is arranged and rotating the rod-shaped member. The rod-shaped member rotating by the third holding means may be provided with a welding means for welding the core member over the entire circumference of the rod-shaped member.

According to this, by rotating the rod-shaped member by the third holding means that holds the rod-shaped member on which the core member is arranged, the core member is welded to the rod-shaped member over the entire circumference of the rod-shaped member by the welding means. Can be done.

The welding means for spot welding described above and the welding means for welding the core member to the rod-shaped member over the entire circumference of the rod-shaped member may be the same welding means or different welding means.

The method for manufacturing the core structure of the winding shaft for a shutter curtain according to the present invention includes a rod-shaped member forming a shaft neck portion at the axial end of the winding shaft for freely winding the shutter curtain, and a center. The rod-shaped member formed of a round bar is inserted into the central hole provided in the portion to be arranged in the rod-shaped member, and is joined to the rod-shaped member by welding to form the winding shaft. A core structure of a winding shaft for a shutter curtain, which includes a core member whose outer peripheral portion is coupled to the inner peripheral portion of the round tubular member inside the round tubular member forming the main body. A chamfered portion is provided on at least one of the outer peripheral portion of the tip end surface of the rod-shaped member and the inner peripheral portion of the end portion of the central hole on the side where the tip end surface is inserted. The work process for holding the core member by the first holding means and holding the rod-shaped member by the second holding means, and the first holding means and the second holding means. A work step for advancing at least one holding means toward the other holding means in order to insert the rod-shaped member into the central hole of the core member, and the first holding means and the second holding means. It is characterized in that at least one of the holding means includes a working step for making the holding relaxed when the tip surface is inserted into the central hole. It is a thing.

As described above, in the method for manufacturing the core structure of the winding shaft for the shutter curtain according to the present invention, the outer peripheral portion of the tip surface of the rod-shaped member and the tip surface of the rod-shaped member in the central hole of the core member are inserted. A chamfering portion is provided on at least one of the inner peripheral portions of the end portion, the core member is held by the first holding means, and the rod-shaped member is held by the second holding means. At least one of the holding means and the second holding means advances toward the other holding means in order to insert the rod-shaped member into the central hole of the core member, and the first holding means and the second holding means Of the means, at least one holding means is in a state in which the holding is relaxed when the tip surface of the rod-shaped member is inserted into the central hole of the core member, so that the tip surface of the rod-shaped member is medium. Even if there is a misalignment between the rod-shaped member and the center hole when inserted into the center hole of the child member, at least one of the core member and the rod-shaped member moves in the inner and outer diameter directions to prevent this misalignment. While eliminating the problem, the rod-shaped member can be inserted into the central hole of the core member as predetermined, whereby the working time can be shortened and the working efficiency can be improved.

Further, also in the method for manufacturing the core structure of the winding shaft for a shutter curtain according to the present invention, both the first holding means and the second holding means are used to insert the rod-shaped member into the central hole of the core member. May be moved, or only one of the first holding means and the second holding means may be moved. Further, the state of relaxing the holding may be performed for both the first holding means and the second holding means, or only for one of the first holding means and the second holding means. You may go.

Further, in order to insert the rod-shaped member into the central hole of the core member, only one of the first holding means and the second holding means is moved, and the holding is relaxed. When only one of the first holding means and the second holding means is used, one of the holding means may be the same holding means, or may be different holding means from each other.

The apparatus for manufacturing the core structure of the take-up shaft for a shutter curtain and the method for manufacturing the same according to the present invention described above include a core structure of a take-up shaft for freely winding out a shutter curtain for any purpose. This shutter curtain can be used for manufacturing, and the shutter curtain is formed by, for example, a plurality of slat, a panel, a pipe, etc., and at least a part of the shutter curtain is formed to open / close an opening such as an entrance / exit. Alternatively, it may be a shutter curtain for forming a fireproof section by forming at least a part of the sheet or the like having fire resistance or fireproof property and fully closing the sheet.

According to the present invention, the work of inserting the rod-shaped member for the winding shaft for freely winding the shutter curtain into the center hole of the core member is automatically performed even if the rod-shaped member and the center hole are misaligned. You can get the effect of being able to do it.

FIG. 1 is a front view showing the entire shutter device including a shutter curtain that is freely wound by a winding shaft. FIG. 2 is a partially omitted front view showing a take-up shaft including a core structure. FIG. 3 is a cross-sectional view taken along the line S3-S3 of FIG. FIG. 4 is a front view showing the entire manufacturing apparatus for the core structure. FIG. 5 is a plan view showing the entire apparatus for manufacturing the core structure. 6A and 6B show a first holding means, where FIG. 6A is a left side view and FIG. 6B is a front view. 7A and 7B show a second holding means, where FIG. 7A is a right side view and FIG. 7B is a front view. 8A and 8B show a third holding means, where FIG. 8A is a left side view and FIG. 8B is a front view. FIG. 9 is a schematic front view showing the first operation in manufacturing the core structure. FIG. 10 is a diagram similar to FIG. 9 showing the next operation when manufacturing the core structure. FIG. 11 is a diagram similar to FIG. 9 showing the next operation of FIG. 10 when manufacturing the core structure. FIG. 12 is a diagram similar to FIG. 9 showing the next operation of FIG. 11 when manufacturing the core structure. FIG. 13 is an enlarged view of a part of FIG. 12, which is a cross-sectional view of the core member. FIG. 14 is a diagram similar to FIG. 9 showing the next operation of FIG. 12 when manufacturing the core structure. FIG. 15 is a diagram similar to FIG. 9 showing the next operation of FIG. 14 when manufacturing the core structure. FIG. 16 is a diagram similar to FIG. 9 showing the next operation of FIG. 15 when manufacturing the core structure. FIG. 17 is a diagram similar to FIG. 9 showing the next operation of FIG. 16 when manufacturing the core structure. FIG. 18 is a diagram similar to FIG. 9 showing the next operation of FIG. 17 when manufacturing the core structure. FIG. 19 is a diagram similar to FIG. 9 showing the next operation of FIG. 18 when manufacturing the core structure. FIG. 20 is a diagram similar to FIG. 9 showing the next operation of FIG. 19 when manufacturing the core structure. FIG. 21 is a diagram similar to FIG. 9 showing the next operation of FIG. 20 when manufacturing the core structure. FIG. 22 is a diagram similar to FIG. 9 showing the next operation of FIG. 21 when manufacturing the core structure. FIG. 23 is a diagram similar to FIG. 9 showing the next operation of FIG. 22 when manufacturing the core structure. FIG. 24 is a diagram similar to FIG. 9 showing the next operation of FIG. 23 when manufacturing the core structure. FIG. 25 is a diagram similar to FIG. 9 showing the next operation of FIG. 24 when manufacturing the core structure. FIG. 26 is a diagram similar to FIG. 9 showing the next operation of FIG. 25 when manufacturing the core structure. FIG. 27 is a diagram similar to FIG. 9 showing the next operation of FIG. 26 when manufacturing the core structure. FIG. 28 is a diagram similar to FIG. 9 showing the next operation of FIG. 27 when manufacturing the core structure. FIG. 29 is a diagram similar to FIG. 9 showing the next operation of FIG. 28 when manufacturing the core structure. FIG. 30 is a diagram similar to FIG. 9 showing the next operation of FIG. 29 when manufacturing the core structure. FIG. 31 is a diagram similar to FIG. 9 showing the next operation of FIG. 30 when manufacturing the core structure. FIG. 32 is a diagram similar to FIG. 9 showing the next operation of FIG. 31 when manufacturing the core structure. FIG. 33 is a diagram similar to FIG. 9 showing the next operation of FIG. 32 when manufacturing the core structure. FIG. 34 is a diagram similar to FIG. 9 showing the next operation of FIG. 33 when manufacturing the core structure. FIG. 35 is a diagram similar to FIG. 9 showing the next operation of FIG. 34 when manufacturing the core structure. FIG. 36 is a diagram similar to FIG. 9 showing the next operation of FIG. 35 when manufacturing the core structure. FIG. 37 is a diagram similar to FIG. 13 showing a core member of another embodiment in which a chamfered portion is provided in the central hole.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows a shutter curtain 1 that opens and closes and moves on a take-up shaft having a core structure manufactured by the apparatus and method according to the embodiment of the present invention. The shutter curtain 1 opens and closes a pair of left and right guide rails 2, a shutter case 4 in which a take-up shaft 3 is housed, and an opening 6 such as a doorway surrounded by a floor 5. In the shutter curtain 1 in which the main portion is formed by connecting the slats 1A of the above and below, the take-up shaft 3 to which the upper end of the shutter curtain 1 is connected rotates forward by an opening / closing device (not shown). The shutter curtain 1 is wound around the winding shaft 3 and is unwound from the winding shaft 3 by rotating the winding shaft 3 in the reverse direction by the opening / closing machine, whereby the shutter curtain 1 is guided by a pair of left and right guide rails 2 up and down. Move to open and close. Both ends of the take-up shaft 3 in the axial direction are rotatably supported by the bracket 9.

FIG. 2 shows a take-up shaft 3 in which a part in the length direction is omitted. The take-up shaft 3 has a shaft neck portion 3A at both ends in the axial direction of the take-up shaft 3 and a main body 3B between these shaft neck portions 3A, and is rotatable by the bracket 9 in FIG. Each shaft neck portion 3A supported by the shaft neck portion 3A is formed of a rod-shaped member 7 made of a metal round bar, and the main body 3B has a metal round cylinder shape having a length slightly shorter than the total length of the winding shaft 3. It is formed by a member 8. Further, of the two left and right rod-shaped members 7, one of the rod-shaped members 7 is attached with a sprocket wheel in which the driving force from the above-mentioned switch composed of a combination of an electric motor and a brake is transmitted by a chain. As a result, the take-up shaft 3 rotates forward and reverse by the driving force from the switch.

In each rod-shaped member 7 forming the shaft neck portion 3A, the first core member 11 and the second core member 12 formed in a disk shape by a metal plate material are spaced apart from each other in the axial direction of the rod-shaped member 7. In order to arrange these first and second core members 11 and 12 having the same thickness dimension and the same outer diameter dimension on the rod-shaped member 7, the members are arranged apart from each other. As can be seen from FIG. 3 which is a cross-sectional view taken along the line S3-S3 of No. 2, a round hole having an inner diameter slightly larger than the outer diameter of the rod-shaped member 7 is formed in the central portion of the first and second core members 11 and 12. The central holes 11A and 12A are provided, and after the rod-shaped member 7 is inserted into the central holes 11A and 12A, the rod-shaped member 7 and the first and second core members 11 and 12 are placed in the first and second middle holes. On both sides of the child members 11 and 12 in the thickness direction, the rod-shaped members 7 are connected by welded portions 14 to 17 over the entire circumference, and these all-round welded portions 14 to 17 attach the first and second cores to the rod-shaped member 7. Members 11 and 12 are connected.

By the rod-shaped member 7 and the first and second core members 11 and 12, two core structures 20 having a symmetrical shape as shown in FIG. 2 are manufactured, and these core structures are manufactured. Of the members constituting the body 20, the first and second core members 11 and 12 are inserted into the round tubular member 8 forming the main body 3B of the take-up shaft 3, and are inserted into the first and second middle members. By connecting the outer peripheral portions of the child members 11 and 12 to the inner peripheral portions of the round tubular member 8, shaft neck portions 3A are provided at both ends of the main body 3B in the axial direction by the rod-shaped members 7 of the core structure 20. The take-up shaft 3 is manufactured.

In addition, in order to connect the outer peripheral portions of the first and second core members 11 and 12 to the inner peripheral portion of the round tubular member 8, in FIGS. 2 and 3, the first and first round tubular members 8 are connected. 2 A plurality of holes 8A shown in FIG. 3 are provided in the circumferential direction at positions corresponding to the arrangement locations of the core members 11 and 12, and in these holes 8A, the round tubular member 8 and the first and first holes 8A are provided. 2 The core members 11 and 12 are spot-welded by electric welding using a welding rod. However, of the first and second core members 11 and 12, the second core member 12 arranged on the axial end side of the round tubular member 8 is in the axial direction of the round tubular member 8. The entire circumference of the outer peripheral portion of the second core member 12 is welded to the inner peripheral portion of the round tubular member 8 by an electric welding means using a welding rod inserted into the round tubular member 8 from the opening at the end. You may.

Further, as shown in FIG. 2, both end faces in the axial direction of each of the rod-shaped members 7 constituting the two core structures 20 having a symmetrical shape are provided on both end faces thereof. The chamfered portions 7A and 7B are formed by cutting the outer peripheral portion of the above, and among these chamfered portions 7A and 7B, the rod-shaped member 7 on which the chamfered portion 7A protruding to the outside of the round tubular member 8 is formed. The end surface of the rod-shaped member 7 is the tip surface 7C of the rod-shaped member 7, and the end surface of the rod-shaped member 7 on which the chamfered portion 7B arranged inside the round tubular member 8 is formed is the rear end surface of the rod-shaped member 7. It is 7D.

FIG. 4 shows a front view of the manufacturing apparatus 30 of the core structure 20 according to the embodiment of the present invention, and FIG. 5 is a plan view of the manufacturing apparatus 30. The manufacturing apparatus 30 has a first holding means 31 for holding the first and second core members 11 and 12 and a second holding for holding the rod-shaped member 7 on the pedestal 30A, as will be described later. The means 32 and the third holding means 33 for holding the rod-shaped member 7 and rotating the rod-shaped member 7 are arranged at intervals in the left-right direction, and the second holding means 32 and The first holding means 31 arranged between the third holding means 33 and the third holding means 33 is fixedly installed on the pedestal 30A. Further, the second holding means 32 is arranged on the slider 35 which is guided by the guide rail 34 and is free to move forward and backward with respect to the first holding means 31, and the third holding means 33 is also guided by the guide rail 36. It is arranged on the slider 37 which is free to move forward and backward with respect to the first holding means 31. A nut member 41 screwed into a feed screw member 40 in which the driving force from the electric motor 38 shown in FIG. 4 is transmitted via a driving force transmitting means 39 composed of a belt or the like is attached to the slider 35. As a result, the second holding means 32 and the slider 35 move forward and backward with respect to the first holding means 31 by the forward and reverse rotation of the electric motor 38. Further, the slider 37 has a nut member 45 screwed into a feed screw member 44 in which the driving force from the electric motor 42 shown in FIG. 4 is transmitted via a driving force transmitting means 43 composed of a belt or the like. Attached, the third holding means 33 and the slider 37 also move forward and backward with respect to the first holding means 31 by the forward and reverse rotation of the electric motor 42.

6A and 6B show the first holding means 31, FIG. 6A is a left side view, and FIG. 6B is a front view. The first holding means 31 is a ring-shaped main body 50 fixedly installed on the pedestal 30A, and the first and second holding means 31 are held on the side surfaces of the main body 50 facing the second holding means 32. The core members 11 and 12 are configured to include three claw members 51 arranged at equal intervals in the circumferential direction, and each claw member 51 is a second holding means of the main body 50. Guided by a guide groove 52 formed on the side surface facing the 32, the first and second core members 11 and 12 are movable in the inner and outer diameter directions. The circular opening hole 50A provided in the center of the ring-shaped main body 50 includes the rod-shaped member 7 and the first and second cores when the claw member 51 is moving in the outer diameter direction. The size is such that the members 11 and 12 can pass through.

As shown in FIG. 5, an electric motor 54 is attached to the main body 50 via a bracket 53, and the driving force of the electric motor 54 is input to the inside of the main body 50 via the bevel gear mechanism 55. .. Further, the ring-shaped disk member 56 shown in FIG. 6A is rotatably housed inside the main body 50, and the driving force of the electric motor 54 input to the inside of the main body 50 is the driving force of the main body 50. Since it is transmitted to the disk member 56 via the bevel gear mechanism arranged inside, the disk member 56 rotates forward or reverse according to the rotation direction of the drive shaft of the electric motor 54. Further, the disc member 56 is formed with spiral ridges, and each claw member 51 is provided with a dent that engages with the spiral ridge, so that the disc member 56 is positive. When rotated, each claw member 51 moves in the inner diameter direction to hold the first and second core members 11 and 12, and when the disk member 56 rotates in the reverse direction, each claw member 51 moves in the outer diameter direction. By doing so, the holding of the first and second core members 11 and 12 is released.

Therefore, in the first holding means 31, three claw members 51 arranged in the circumferential direction of the first and second core members 11 and 12 have inner and outer diameters of the first and second core members 11 and 12. It is a scroll chuck type holding means that moves in the direction to hold and release the first and second core members 11 and 12.

As shown in FIG. 6B, the tip portion on the inner diameter side of each claw member 51 is provided with a recessed portion 57 recessed on the side opposite to the second holding means 32, and these recessed portions. The inner diameter side of 57 is open, and the outer diameter side is closed by the wall portion 57A.

7A and 7B show the second holding means 32, FIG. 7A is a right side view, and FIG. 7B is a front view. The second holding means 32 is a ring-shaped main body 60 fixedly installed on the slider 35 shown in FIGS. 4 and 5, and a second holding means 32 on the side surface of the main body 60 facing the first holding means 31. It is configured to include three claw members 61 arranged at equal angular intervals in the circumferential direction of the rod-shaped member 7 to be held, and each claw member 61 is a first holding means of the main body 60. It is guided by a guide groove 62 formed on the side surface facing the 31 and is movable in the inner and outer diameter directions of the rod-shaped member 7.

As shown in FIG. 5, an electric motor 64 is attached to the main body 60 via a bracket 63, and the driving force of the electric motor 64 is input to the inside of the main body 60 via the bevel gear mechanism 65 to enter the main body. Inside the 60, the ring-shaped disk member 66 shown in FIG. 7A is rotatably housed. The driving force of the electric motor 64 input to the inside of the main body 60 is transmitted to the disk member 66 via the bevel gear mechanism arranged inside the main body 60, thereby depending on the rotation direction of the drive shaft of the electric motor 64. The disk member 66 rotates forward or backward. Further, the disk member 66 is also formed with spiral ridges, and each claw member 61 is provided with dents that engage with the spiral ridges, so that the disk member 66 is also provided. When the claw member 61 rotates forward, each claw member 61 moves in the inner diameter direction to hold the rod-shaped member 7, and when the disk member 66 rotates in the reverse direction, each claw member 61 moves in the outer diameter direction to hold the rod-shaped member 7. Release the holding of.

Therefore, in the second holding means 32 as well, the three claw members 61 arranged in the circumferential direction of the rod-shaped member 7 move in the inner and outer diameter directions of the rod-shaped member 7 to hold and release the rod-shaped member 7. It is a scroll chuck type holding means for performing the above.

As shown in FIG. 7B, a recessed portion 67 recessed on the side opposite to the first holding means 31 is provided at the rear end portion on the outer diameter side of each claw member 61, and these are provided. A coil spring 68, which is an elastic member, is arranged in the recessed portion 67, and the base end portion is welded to the recessed portion 67 or coupled to the recessed portion 67 by a coupling tool or the like (not shown). The portion 68A is in a state of protruding toward the first holding means 31 side from the side surface 61A of the claw member 61 on the first holding means 31 side.

8A and 8B show a third holding means 33, FIG. 8A is a left side view, and FIG. 8B is a front view. The third holding means 33 is a ring-shaped main body 70 rotatably arranged around a horizontal axis on a base 37A fixedly installed on the slider 37 shown in FIGS. 4 and 5, and the main body 70. On the side surface facing the first holding means 31, three claw members 71, which are arranged at equal intervals in the circumferential direction of the rod-shaped member 7 held by the third holding means 33, are included. It has become. Each claw member 71 is guided by a guide groove 72 formed on a side surface of the main body 70 facing the first holding means 31, and is movable in the inner and outer diameter directions of the rod-shaped member 7.

As shown in FIG. 5, an electric motor 74 is attached to the base 37A via a bracket 73, and the driving force of the electric motor 74 is input to the inside of the main body 70 via the bevel gear mechanism 75. A ring-shaped disk member 76 shown in FIG. 8A is rotatably housed inside the main body 70. The driving force of the electric motor 54 input to the inside of the main body 70 is transmitted to the disk member 76 via the bevel gear mechanism arranged inside the main body 70, and therefore, depending on the rotation direction of the drive shaft of the electric motor 74. Therefore, the disk member 76 rotates in the forward direction or in the reverse direction. A spiral ridge is also formed on the disk member 76, and each claw member 71 is provided with a dent that engages with the spiral ridge. Therefore, when the disk member 76 rotates in the forward direction, Each claw member 71 moves in the inner diameter direction to hold the rod-shaped member 7, and when the disk member 76 rotates in the reverse direction, each claw member 71 moves in the outer diameter direction to release the holding of the rod-shaped member 7. ..

Therefore, in the third holding means 33 as well, the three claw members 71 arranged in the circumferential direction of the rod-shaped member 7 move in the inner and outer diameter directions of the rod-shaped member 7 to hold and release the rod-shaped member 7. It is a scroll chuck type holding means for performing the above.

Further, the third holding means 33 is provided with a ring gear 77 connected to the main body 70, and in order to connect the main body 70 and the ring gear 77, the main body 70 and the ring gear 77 are placed in the center of the ring-shaped main body 70. A tubular connecting member for connecting and is provided. As shown in FIGS. 4 and 5, a gear 80 rotated by an electric motor 79 attached to the base 37A via a bracket 78 meshes with the ring gear 77 over the entire circumference of the main body 70. Therefore, due to the driving force of the electric motor 79, the main body 70 rotates about the horizontal axis with respect to the base 37A, and the three claw members 71 also rotate about the horizontal axis together with the main body 70.

Therefore, the three claw members 71 of the third holding means 33 perform movement of the rod-shaped member 7 in the inner and outer radial directions by the electric motor 74 and rotation about the horizontal axis by the electric motor 79, and three of them. When the claw member 71 of the above holds the rod-shaped member 7, the rotation of these claw members 71 causes the rod-shaped member 7 to rotate as well.

Therefore, in the third holding means 33, when the three claw members 71 hold the rod-shaped member 7, the main body 70 and the three claw members 71 are held on the horizontal axis by the electric motor 79, as will be described later. It is designed to rotate around the center. In order to realize this operation, when the main body 70 and the three claw members 71 are rotated about the horizontal axis by the electric motor 79, the three claw members 71 are rod-shaped by the driving force of the electric motor 74. The power supply circuit of the electric motor 74 is designed to keep the member 7 held, or when the main body 70 and the three claw members 71 are rotated about the horizontal axis by the electric motor 79. It is blocked so that the operation of an electromagnetic brake or the like (not shown) prevents the three claw members 71 holding the rod-shaped member 7 from moving in the outer radial direction.

As shown in FIG. 5, in the manufacturing apparatus 30 of the core structure 20 according to the present embodiment, the first and second core members 11 and 12 are supplied to the first holding means 31, and the first and second core members 11 and 12 are supplied. 2 The supply means 85 for supplying the rod-shaped member 7 to the holding means 32, the first welding means 86 for spot welding the first and second core members 11 and 12 to the rod-shaped member 7, and the rod-shaped member 7. A second welding means 87 for welding the first and second core members 11 and 12 over the entire circumference of the rod-shaped member 7 is provided, and a supply means 85 thereof and an electric welding means using a welding rod are provided. The first and second welding means 86 and 87 are, for example, moved forward and backward and left and right with respect to the first to third holding means 31 to 33 by a robot. As will be described later, the supply means 85 thirdly holds the core structure 20 in which the first and second core members 11 and 12 are welded to the rod-shaped member 7 over the entire circumference of the rod-shaped member 7. It may be used for taking out from the means 33, or the first and second welding means 86 and 87 may be used as one common welding means.

Next, with reference to FIGS. 9 to 36, a procedure of work for manufacturing the core structure 20 shown in FIG. 2 by the manufacturing apparatus 30 shown in FIGS. 4 and 5 will be described. This work described below is performed on the electric motors 38 and 42 of FIG. 4 arranged on the pedestal 30A of the manufacturing apparatus 30 and the first holding means 31 shown in FIG. 5 by a sequence means programmed by a computer. The electric motor 54, the electric motor 64 of the second holding means 32, the electric motors 74 and 79 of the third holding means 33, the supply means 85 including the robot, and the first and second welding means 86 and 87 including the robot. It is performed as an automatic work by controlling and.

As shown in FIG. 9, the rod-shaped member 7 was first supplied to the second holding means 32 by the supply means 85 of FIG. 5, and the rod-shaped member 7 moved in the inner diameter direction of the second holding means 32. It is held by the claw member 61, and then, as shown in FIG. 10, the first core member 11 is supplied to the first holding means 31 by the supply means 85, and the first core member 11 is the first. It is held by the claw member 51 that has moved in the inner diameter direction of the holding means 31. This holding is performed by sandwiching the outer peripheral portion of the first core member 11 with the wall portion 57A on the outer diameter side of each of the recessed portions 57 of the claw member 51 shown in FIG. Be told. After this, as shown in FIG. 11, the second holding means 32 advances toward the first holding means 31, and due to this advance, the tip surface 7C of the rod-shaped member 7 also shown in FIG. 1 When approaching the core member 11, as shown in FIG. 12, each claw member 51 of the first holding means 31 moves slightly in the outer diameter direction. As a result, the holding of the first core member 11 by the first holding means 31 is relaxed. At this time, the first core member 11 moves slightly downward due to its own weight, but the amount of movement of the claw member 51 in the outer diameter direction is sufficiently smaller than the length dimension in the inner and outer diameter directions of the recessed portion 57. Therefore, the first core member 11 does not fall off from each of the claw members 51, and therefore, the holding of the first core member 11 by the first holding means 31 is maintained, and this holding is relaxed. It will be.

FIG. 13 shows a partially enlarged view of FIG. 12 at this time, in which the first core member 11 is shown as a cross section. As described with reference to FIG. 2, the tip surface 7C of the rod-shaped member 7 is provided with a chamfered portion 7A formed by cutting the outer peripheral surface of the tip surface 7C. Therefore, the central axis N1 of the rod-shaped member 7 and the central axis N2 of the above-mentioned central hole 11A provided in the central portion of the first core member 11 are in the vertical direction and the front-rear direction (paper surface in FIG. 13). As shown in FIG. 14, when the second holding means 32 advances toward the first holding means 31, the chamfering portion 7A causes the first holding means 31 to be misaligned. The misalignment is eliminated by moving the first core member 11 in which the holding of the rod-shaped member 11 is relaxed in the inner and outer radial directions in the vertical direction and the front-rear direction, whereby the rod-shaped member 7 can be moved from the tip surface 7C. It is inserted into the central hole 11A of the first core member 11.

Therefore, according to the present embodiment, there is an error in the installation accuracy of the first holding means 31 and the second holding means 32 in the manufacturing apparatus 30, even in the vertical direction and the front-back direction, and due to this error, the rod-shaped member 7 Even if the central axis N1 and the central axis N2 of the central hole 11A of the first core member 11 are misaligned in the vertical direction or the front-rear direction, such an error and the misalignment are eliminated by the chamfering portion 7A. The rod-shaped member 7 can be inserted into the central hole 11A of the first core member 11 from the tip surface 7C, and the first core member 11 can be arranged in the rod-shaped member 7.

15 and 16 show the post-work of FIG. 14, and as shown in FIG. 15, after each of the claw members 51 of the first holding means 31 has moved in the outer diameter direction, FIG. As shown, the second holding means 32 holding the rod-shaped member 7 retracts from the first holding means 31. Next, as shown in FIG. 17, the second core member 12 is supplied to the first holding means 31 by the supply means 85, and the second core member 12 is in the inner diameter direction of the first holding means 31. It is held by the claw member 51 that has moved to, and this holding is performed in the recessed portion 57 of each of the claw member 51 shown in FIG. 6 on the outer diameter side of the recessed portion 57, as in the case of FIG. This is done by sandwiching the outer peripheral portion of the second core member 12 with the wall portion 57A.

Next, as shown in FIG. 18, the second holding means 32 advances toward the first holding means 31, and by this advance, the tip surface 7C of the rod-shaped member 7 approaches the first core member 11. Occasionally, each of the claw members 51 of the first holding means 31 moves slightly in the outer diameter direction, whereby the holding of the second core member 12 by the first holding means 31 is relaxed. As in the case of FIG. 12, this relaxation is performed so that the amount of movement of the claw member 51 in the outer diameter direction is sufficiently smaller than the length dimension in the inner and outer diameter directions of the recessed portion 57. The child members 12 do not fall off from the respective claw members 51, so that the holding of the second core member 12 by the first holding means 31 is maintained, but the holding is relaxed.

After this, as shown in FIG. 19, the second holding means 32 holding the rod-shaped member 7 advances toward the first holding means 31, and also at this time, the first holding means in the manufacturing apparatus 30. Since there is an error in the vertical direction and the front-rear direction in the installation accuracy of the 31 and the second holding means 32, the central axis of the rod-shaped member 7 and the central axis of the central hole 12A of the second core member 12 are in the vertical direction. Even if there is a misalignment in the front-rear direction, the chamfering portion 7A moves the second core member 12 whose holding by the first holding means 31 is relaxed in the vertical direction and the inner / outer radial direction in the front-rear direction. The misalignment is eliminated, so that the rod-shaped member 7 can be inserted from the tip surface 7C into the center hole 12A of the second core member 12.

Next, as shown in FIG. 20, the claw member 51 of the first holding means 31 moves in the inner diameter direction to firmly hold the second core member 12, and by this firm holding, the central hole 12A Even if the inner diameter is slightly larger than the outer diameter of the rod-shaped member 7 so that the rod-shaped member 7 can be inserted into the central hole 12A, the second core member 12 is in an upright state on the rod-shaped member 7. It will be placed. After this, as shown in FIG. 21, the second core member 12 is spot-welded to the rod-shaped member 7 by the first welding means 86 shown in FIG. 5, and the second core member 90 is spot-welded by the spot welded portion 90. The member 12 is positioned on the rod-shaped member 7 and temporarily connected.

After this, as shown in FIG. 22, the claw member 51 of the first holding means 31 moves in the outer diameter direction to release the holding of the second core member 12, and is further shown in FIG. As such, the second holding means 32 holding the rod-shaped member 7 advances toward the first holding means 31 side. As a result, the second core member 12 arranged in the rod-shaped member 7 passes through the circular opening hole 50A of the main body 50 shown in FIG. 6A of the first holding means 31, and the first one. The core member 11 moves to a position that coincides with or substantially coincides with the position where the claw member 51 of the first holding means 31 is arranged. Next, as shown in FIG. 24, the third holding means 33 advances toward the first holding means 31, and after that, as shown in FIG. 25, each of the third holding means 33. As the claw member 71 moves in the inner diameter direction, the rod-shaped member 7 is held by the third holding means 33. Next, as shown in FIG. 26, each of the claw members 51 of the first holding means 31 moves in the inner diameter direction, and the amount of movement at this time is the above-mentioned wall portion 57A of the recessed portion 57 of the claw member 51. Is smaller than the amount of movement for sandwiching the outer peripheral portion of the first core member 11, and the amount of movement that the claw member 51 relaxes and holds the first core member 11 is the same as in FIG. The amount of movement is about the same.

After this, as shown in FIG. 27, the claw member 61 of the second holding means 32 moves in the outer diameter direction, and then, as shown in FIG. 28, the second holding means 32 is the second holding means 32. 1 Move forward slightly toward the holding means 31 side. According to this, coil springs 68, which are elastic members shown in FIG. 7, are attached to each of the claw members 61 of the second holding means 32, and the tip 68A of these coil springs 68 is the claw member 61. Since the holding of the first core member 11 by the claw member 51 of the first holding means 31 is relaxed by projecting from the side surface 61A on the side of the first holding means 31 in the above, these coil springs 68 make the first middle member. The child member 11 is elastically pressed against the recessed portion 57 of the claw member 51 with a large load. Therefore, even if the inner diameter of the central hole 11A of the first core member 11 is slightly larger than the outer diameter of the rod-shaped member 7 so that the rod-shaped member 7 can be inserted into the central hole 11A, this first core member 11. 1 The core member 11 is arranged upright on the rod-shaped member 7.

After the first core member 11 is placed upright on the rod-shaped member 7 in this way, as shown in FIG. 29, the third holding means 33 holding the rod-shaped member 7 Retreat from the first holding means 31. As a result, the arrangement position of the first core member 11 in the rod-shaped member 7 is such that the first core member 11 receives the pressing force of the coil spring 68 and maintains an upright state with respect to the rod-shaped member 7. The position is changed to a position far from the above-mentioned tip surface 7C, and the first core member 11 is arranged at a position close to the rear end surface 7D on the rod-shaped member 7 opposite to the tip surface 7C in the length direction. As a result, the first core member 11 is arranged at the same position as the arrangement position of the first core member 11 in the length direction of the rod-shaped member 7 shown in FIG.

Next, as shown in FIG. 30, each claw member 51 of the first holding means 31 moves in the inner diameter direction to firmly hold the first core member 11, whereby the first core member 11 is firmly held. The 11 continues to be arranged upright on the rod-shaped member 7. After this, as shown in FIG. 31, the second holding means 32 recedes from the first holding means 31. Next, as shown in FIG. 32, the first core member 11 arranged upright on the rod-shaped member 7 is spot-welded to the rod-shaped member 7 by the first welding means 86 shown in FIG. The first core member 11 is positioned and temporarily connected to the rod-shaped member 7 by the spot welded portion 91, whereby, as shown in FIG. 33, the claw member 51 of the first holding means 31 is positioned in the outer radial direction. Even if the holding of the first core member 11 is released by moving to, the first core member 11 maintains an upright state on the rod-shaped member 7.

Before the first core member 11 is positioned on the rod-shaped member 7 by the spot welded portion 91 by the first welding means 86 and temporarily connected, as shown in FIGS. 31 and 32, the second holding means The reason why the 32 is retracted from the first holding means 31 is that, as described above, the arrangement position of the first core member 11 on the rod-shaped member 7 is set to the first position in the length direction of the rod-shaped member 7 shown in FIG. The first holding means is changed to a position close to the rear end surface 7D on the opposite side of the rod-shaped member 7 in the length direction from the tip surface 7C of the rod-shaped member 7 so as to be the same as the arrangement position of the core member 11. This is to secure a sufficiently large space in which the first welding means 86 can be inserted between the 31 and the second holding means 32. As a result, in FIGS. 14 and 15, since the rod-shaped member 7 is held by the claw member 61 of the second holding means 32 over a long dimension, the first holding means 31 is held between FIGS. 14 and 15. By carrying out the work of firmly holding the first core member 11 with the claw member 51 of the above, the work of temporarily joining the first core member 11 to the rod-shaped member 7 by spot welding by the first welding means 86 can be performed. Even if this is not possible, in FIG. 32, this temporary connection work can be performed, and by this temporary connection, the first core member 11 becomes a rod-shaped member 7, and the rod-shaped member 7 from the first core member 11 The rear end surface 7D can be arranged with a small protrusion amount.

After that, as shown in FIG. 34, the first holding means 31 holds the rod-shaped member 7 in which the first and second core members 11 and 12 are arranged by the claw member 71. Then, as shown in FIG. 35, each of the claw members 71 of the third holding means 33 rotates about the horizontal axis, so that the rod-shaped member 7 and the first and second core members are formed. 11 and 12 also rotate around the horizontal axis. At the time of this rotation, one side of the second core member 12 in the thickness direction is welded over the entire circumference of the rod-shaped member 7 by the second welding means 87 shown in FIG. The child member 12 is connected to the rod-shaped member 7 by the all-around welded portion 17 also shown in FIG. After that, the rod-shaped member 7 and the first and second core members 11 and 12 are rotated about the horizontal axis by the claw member 71, and as shown in FIG. 36, by the second welding means 87. The other side of the second core member 12 in the thickness direction is welded over the entire circumference of the rod-shaped member 7, and both sides of the first core member 11 in the thickness direction extend over the entire circumference of the rod-shaped member 7. The second core member 12 is welded by the all-around welded portion 16 also shown in FIG. 2, and the first core member 11 is welded by the all-around welded portion 16 also shown in FIG. 14 and 15 are respectively coupled to the rod-shaped member 7.

As described above, the core structure 20 shown in FIG. 2, which is composed of the rod-shaped member 7 and the first and second core members 11 and 12, is manufactured.

Next, although not shown in the drawing, after the rotation of the rod-shaped member 7 and the first and second core members 11 and 12 around the horizontal axis is stopped, the claw member 71 of the third holding means 33 has an outer diameter. It moves in the direction to release the holding of the rod-shaped member 7, and after that, the core structure 20 is taken out from the third holding means 33 by a taking-out means (not shown). In addition, this taking-out operation may be carried out by the supply means 85 shown in FIG.

FIG. 37 shows the first and second core members 11 ′ and 12 ′ according to another embodiment. In the central holes 11A'and 12A'provided as round holes in the central portions of the first and second core members 11'and 12', the rod-shaped members 7 in the central holes 11A'and 12A' A chamfered portion 92 is formed at the inner peripheral portion of the end portion on the side where the tip surface 7C is inserted. According to this, as described above, there is an error in the installation accuracy of the first holding means 31 and the second holding means 32 in the manufacturing apparatus 30, even in the vertical direction and the front-back direction, and due to this error, the rod-shaped member 7 The chamfered portion 92 even if the central axis N1 and the central axis N2 of the central holes 11A'12A'of the first and second core members 11'and 12' have a large misalignment in the vertical and front-rear directions. And the chamfered portion 7A formed on the outer peripheral portion of the tip surface 7C of the rod-shaped member 7 eliminates such an error and misalignment, and the rod-shaped member 7 is first and second from the tip surface 7C. It can be inserted into the central holes 11A'and 12A' of the core members 11'and 12'.

The present invention is used to manufacture a core structure constituting a winding shaft for a shutter curtain that opens and closes an opening such as an entrance / exit, a shutter curtain that forms a fireproof compartment when fully closed, and the like. be able to.

1 Shutter curtain 3 Winding shaft 3A Shaft neck 3B Main body 7 Rod-shaped member 7A Chamfered part 7C Tip surface 8 Round tubular member 11,11'First core member 11A, 11A'Center hole 12,12' Second core member 12A, 12A'Center hole 20 Core structure 30 Manufacturing equipment 31 First holding means 32 Second holding means 33 Third holding means 51, 61, 71 Claw member 57 Recessed part 68 Coil spring 85 rod-shaped member which is an elastic member Supply means for supplying the first and second core members 86 First welding means for spot welding the first and second core members to the rod-shaped member 87 Attach the first and second core members to the rod-shaped member Second welding means for full-circle welding 92 Chamfered part

Claims (9)

A rod-shaped member forming the shaft neck portion of the axial end of the winding shaft for freely winding the shutter curtain, and the rod-shaped member formed of a round bar in the central hole provided in the central portion. When the member is inserted, it is arranged on this rod-shaped member, and at the same time, the outer peripheral portion is formed in this round tubular shape inside the round tubular member which is joined to the rod-shaped member by welding to form the main body of the winding shaft. A device for manufacturing a core structure of a winding shaft for a shutter curtain, which includes a core member coupled to an inner peripheral portion of the member.
A first holding means for holding the core member and a second holding means for holding the rod-shaped member are provided, and at least one of these holding means is the rod-shaped member. Can be advanced toward the other holding means in order to insert the core member into the central hole, and the outer peripheral portion of the tip surface of the rod-shaped member and the tip surface of the center hole are inserted. A chamfered portion is provided on at least one of the inner peripheral portions of the end portion on the side to be used, and the tip surface of at least one of the first holding means and the second holding means is the central hole. A device for manufacturing a core structure of a winding shaft for a shutter curtain, which is in a state where the holding is relaxed when inserted into the shutter curtain. In the apparatus for manufacturing a core structure of a winding shaft for a shutter curtain according to claim 1, the number of the core members is a plurality of rod-shaped members at intervals in the axial direction. A device for manufacturing a core structure of a take-up shaft for a shutter curtain. In the apparatus for manufacturing the core structure of the winding shaft for a shutter curtain according to claim 1 or 2, the first holding means includes a plurality of claw members arranged in the circumferential direction of the core member. , A scroll chuck type holding means that is movable in the inner and outer diameter directions of the core member, and the second holding means also has a plurality of claw members arranged in the circumferential direction of the rod-shaped member. An apparatus for manufacturing a core structure of a winding shaft for a shutter curtain, which is a scroll chuck type holding means that is movable in the inner and outer diameter directions of the rod-shaped member. In the apparatus for manufacturing the core structure of the winding shaft for a shutter curtain according to claim 3, the state in which the holding is relaxed means that the plurality of claw members of the scroll chuck type holding means are the same. A device for manufacturing a core structure of a take-up shaft for a shutter curtain, which is characterized in that it is held and moved slightly in the outer diameter direction. In the apparatus for manufacturing the core structure of the shutter curtain take-up shaft according to claim 4, the state in which the holding is relaxed is performed by the first holding means, and each of the second holding means. The claw member is characterized in that an elastic member for elastically pressing the core member is attached to each of the claw members of the first holding means that relaxes the holding of the core member. A device for manufacturing a core structure of a take-up shaft for a shutter curtain. In the apparatus for manufacturing the core structure of the winding shaft for a shutter curtain according to claim 5, the inner diameter side is open and the outer diameter is open to the tip portion on the inner diameter side of each of the claw members of the first holding means. The core member is in a state where the side is closed, a recessed portion is provided on the side opposite to the second holding means, and the holding of the core member is relaxed by the first holding means. An apparatus for manufacturing a core structure of a winding shaft for a shutter curtain, characterized in that the recessed portion is elastically pressed by the elastic member. In the apparatus for manufacturing a core structure of a winding shaft for a shutter curtain according to claim 6, the core member elastically pressed by the elastic member in each of the recesses is spot welded to the rod-shaped member. A device for manufacturing a core structure of a winding shaft for a shutter curtain, which comprises a welding means for the purpose. The apparatus for manufacturing a core structure of a winding shaft for a shutter curtain according to any one of claims 1 to 7, for holding the rod-shaped member on which the core member is arranged and rotating the rod-shaped member. A shutter curtain characterized by comprising a third holding means and a welding means for welding the core member to the rod-shaped member rotated by the third holding means over the entire circumference of the rod-shaped member. Equipment for manufacturing core structures of take-up shafts. A rod-shaped member forming the shaft neck portion of the axial end of the winding shaft for freely winding the shutter curtain, and the rod-shaped member formed of a round bar in the central hole provided in the central portion. When the member is inserted, it is arranged on this rod-shaped member, and at the same time, the outer peripheral portion is formed in this round tubular shape inside the round tubular member which is joined to the rod-shaped member by welding to form the main body of the winding shaft. A method for manufacturing a core structure of a winding shaft for a shutter curtain, which includes a core member coupled to an inner peripheral portion of the member.
A work process for providing a chamfered portion on at least one of the outer peripheral portion of the tip surface of the rod-shaped member and the inner peripheral portion of the end portion of the central hole on the side where the tip surface is inserted.
A work process for holding the core member by the first holding means and holding the rod-shaped member by the second holding means, and
To advance at least one of the first holding means and the second holding means toward the other holding means in order to insert the rod-shaped member into the central hole of the core member. Work process and
A work step for bringing at least one of the first holding means and the second holding means into a state in which the holding is relaxed when the tip surface is inserted into the central hole.
A method for manufacturing a core structure of a take-up shaft for a shutter curtain, which comprises.

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