JP7252800B2 - Device for manufacturing core structure of winding shaft for shutter curtain and method for manufacturing the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus and a method for manufacturing a core structure for a winding shaft that winds a shutter curtain so that it can be drawn out freely. As a result, it can be used to manufacture a core structure of a winding shaft for a shutter curtain or the like that forms a fireproof compartment.

Japanese Patent Laid-Open No. 2002-200002 discloses that a winding shaft for winding a shutter curtain so as to be able to extend is configured to include a core structure. This core structure includes a rod-shaped member forming a shaft neck portion at the axial end of a winding shaft for winding the shutter curtain so as to extend it freely, and a round center hole provided in the center. A rod-shaped member formed of a rod is inserted into the rod-shaped member and is joined to the rod-shaped member by welding to form the main body of the winding shaft. is configured to include a core member coupled to the inner peripheral portion of this round tubular member.

JP-A-2006-316442

The assembly and manufacture of the core structure described above is performed manually by an operator, and the task of inserting the rod-shaped member into the center hole of the core member is also performed manually. In order to shorten the working time and improve the working efficiency, there is a demand for an apparatus and method that can automatically perform the work for inserting the rod-shaped member into the center hole of the core member.

SUMMARY OF THE INVENTION It is an object of the present invention to automatically perform the operation of inserting a rod-shaped member for a take-up shaft that winds a shutter curtain so that it can be drawn out and into the center hole of a core member even if there is misalignment between the rod-shaped member and the center hole. An object of the present invention is to provide an apparatus for manufacturing a core structure of a winding shaft for a shutter curtain and a method for manufacturing the same.

An apparatus for manufacturing a core structure for a shutter curtain winding shaft according to the present invention comprises a rod-shaped member forming a shaft neck portion of an axial end portion of a winding shaft for winding a shutter curtain so as to extend freely; By inserting the rod-shaped member formed of a round bar into the central hole provided with a round hole in the part, it is arranged on this rod-shaped member and joined to this rod-shaped member by welding, and the winding shaft A core structure of a winding shaft for a shutter curtain, comprising a core member having an outer peripheral portion coupled to an inner peripheral portion of the round tubular member forming a main body. comprising a first holding means for holding the core member and a second holding means for holding the rod-like member, and among these holding means, At least one of the holding means is capable of moving forward toward the other holding means in order to insert the rod-shaped member into the center hole of the core member. and at least one of the inner peripheral portion of the end portion of the center hole on the side where the tip end face is inserted is provided with a chamfered portion, and at least one of the first holding means and the second holding means is held. The means is characterized in that the retention is relaxed when the tip face is inserted into the central hole.

As described above, in the apparatus for manufacturing a core structure for a shutter curtain winding shaft according to the present invention, the outer peripheral portion of the tip surface of the rod-shaped member and the end portion of the center hole of the core member on the side into which the tip surface is inserted are formed. A chamfered portion is provided on at least one of the inner peripheral portions of the core member, and at least one of the first holding means and the second holding means has a tip end surface of the rod-like member that faces the core member. When the core member is inserted into the center hole, the retention is relaxed. Therefore, when the tip surface of the rod-shaped member is inserted into the center hole of the core member, misalignment occurs between the rod-shaped member and the center hole. Even if this occurs, at least one of the core member and the rod-shaped member moves in the inner and outer diameter directions to eliminate the misalignment, and the rod-shaped member can be inserted into the center hole of the core member as specified. As a result, the working time can be shortened and the working efficiency can be improved.

In the apparatus for manufacturing a core structure for a shutter curtain winding shaft according to the present invention, both the first holding means and the second holding means are required to insert the rod-shaped member into the center hole of the core member. Alternatively, 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 one of the first holding means and the second holding means. you can go

Further, in order to insert the rod-shaped member into the center 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, the one holding means may be the same holding means or may be different holding means.

Further, in the apparatus for manufacturing a core structure for a shutter curtain winding shaft according to the present invention, the number of core members arranged on the rod-shaped member may be one, or may be arranged in the axial direction of the rod-shaped member. Plural pieces arranged at intervals may be used.

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 are capable of holding and releasing the holding of the core member and the rod-shaped member. It can be of any form and form. An example of the first holding means 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. Also, the second holding means is 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 radially inner and outer diameter directions of the rod-shaped member. In addition to this pressure, the first holding means and the second holding means are wrapped around 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 based on a type elastic member.

Further, as described above, the first holding means 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. 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 radial direction 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 center hole of the core member as described above, Putting at least one of the holding means into a state in which the holding is relaxed is to move the plurality of claw members of the scroll chuck type holding means slightly in the outer diameter direction while maintaining the holding. It can be realized by

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

According to this, when the claw members of the first holding means are loosening the holding of the core member, the elastic members attached to the respective claw members of the second holding means move the respective claw members of the first holding means. In order to elastically press the core member against the pawl member, the core member can be used as a rod-shaped member even if the inner diameter of the center hole of the core member is slightly larger than the outer diameter of the rod-shaped member inserted into the center hole. It can be placed in an upright position on the member.

Then, an elastic member for elastically pressing the core member is attached to each claw member of the second holding means and to each claw member of the first holding means that relaxes the holding of the core member. In this case, a recess is provided at the distal end on the inner diameter side of each claw member of the first holding means, which is open on the inner diameter side and closed on the outer diameter side, and which is recessed on the opposite side of the second holding means. , the core member is elastically pressed against these recesses by elastic members attached to 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 relaxation of this holding and arrangement of the core member in an upright state on the rod-shaped member.

Further, in the apparatus for manufacturing a core structure for a shutter curtain winding shaft according to the present invention, the recessed portions provided in the claw members of the first holding means are elastically pressed by the elastic member. Welding means may be provided for spot welding the core member to the bar member.

According to this, after the core member is arranged in an upright state on the rod-shaped member, the core member can be positioned and joined to the rod-shaped member by spot welding using the welding means.

Further, in the apparatus for manufacturing a core structure of a shutter curtain winding shaft according to the present invention, third holding means for holding a rod-shaped member on which the core member is arranged and rotating the rod-shaped member; Welding means may be provided 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.

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

A method for manufacturing a core structure for a shutter curtain winding shaft according to the present invention includes a rod-shaped member forming a shaft neck portion at an axial end portion of a winding shaft for winding a shutter curtain so as to be unreeled; By inserting the rod-shaped member formed of a round bar into the central hole provided with a round hole in the part, it is arranged on this rod-shaped member and joined to this rod-shaped member by welding, and the winding shaft A core structure of a winding shaft for a shutter curtain, comprising a core member having an outer peripheral portion coupled to an inner peripheral portion of the round tubular member forming a main body. wherein at least one of the outer peripheral portion of the tip end face of the rod-shaped member and the inner peripheral portion of the end of the center hole on the side where the tip end face is inserted is provided with a chamfered portion 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 between 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 a working step for bringing at least one of the holding means into a state in which the holding is relaxed when the tip surface is inserted into the center hole. It is.

As described above, in the method for manufacturing a core structure for a shutter curtain winding shaft according to the present invention, the outer peripheral portion of the tip surface of the rod-shaped member and the side into which the tip surface of the rod-shaped member is inserted in the center hole of the core member are arranged. At least one of the inner peripheral portion of the end portion is chamfered, 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-like member into the center hole of the core member. Of the means, at least one of the holding means is in a state of relaxing the holding when the tip surface of the rod member is inserted into the center hole of the core member, so that the tip surface of the rod member is in the middle. Even if there is misalignment between the rod-shaped member and the center hole when the core member is inserted into the center hole, at least one of the core member and the rod-shaped member moves in the inner and outer diameter directions to correct the misalignment. While eliminating the problem, the rod member can be inserted into the center hole of the core member as specified, thereby shortening the working time and improving the working efficiency.

Also in the method of manufacturing the core structure for the shutter curtain winding shaft according to the present invention, both the first holding means and the second holding means are required to insert the rod-shaped member into the center 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 one of the first holding means and the second holding means. you can go

Further, in order to insert the rod-shaped member into the center 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, the one holding means may be the same holding means or may be different holding means.

The apparatus for manufacturing a core structure for a shutter curtain winding shaft and the method for manufacturing the same according to the present invention described above manufactures a core structure for a winding shaft for winding a shutter curtain for any application so that the shutter curtain can be drawn out freely. This shutter curtain is at least partially formed by, for example, a plurality of slats, panels, pipes, etc., and is used for opening and closing an opening such as a doorway. Alternatively, it may be a shutter curtain at least partially formed of a sheet or the like having fire resistance or fire prevention properties, and being fully closed to form a fire prevention compartment.

According to the present invention, the operation of inserting the rod-shaped member for the take-up shaft for winding the shutter curtain so as to be able to extend it into the center hole of the core member can be automatically performed even if there is misalignment between the rod-shaped member and the center hole. You can get the effect of being able to do it.

FIG. 1 is a front view showing the entire shutter device provided with a shutter curtain that is wound around a winding shaft so as to be unreeled. FIG. 2 is a partially omitted front view showing a winding shaft configured including a core structure. FIG. 3 is a sectional view taken along line S3-S3 of FIG. FIG. 4 is a front view showing the entire core structure manufacturing apparatus. FIG. 5 is a plan view showing the entire core structure manufacturing apparatus. FIG. 6 shows the first holding means, where (A) is a left side view and (B) is a front view. FIG. 7 shows the second holding means, where (A) is a right side view and (B) is a front view. FIG. 8 shows the third holding means, where (A) is a left side view and (B) is a front view. FIG. 9 is a schematic front view showing the first operation in manufacturing the core structure. FIG. 10 is a view similar to FIG. 9 showing the next operation in manufacturing the core structure; FIG. 11 is a view similar to FIG. 9 showing the operation following FIG. 10 in manufacturing the core structure; FIG. 12 is a view similar to FIG. 9 showing the operation following FIG. 11 in manufacturing the core structure; FIG. 13 is an enlarged view of a part of FIG. 12, showing a cross section of the core member. FIG. 14 is a view similar to FIG. 9 showing the operation following FIG. 12 in manufacturing the core structure; FIG. 15 is a view similar to FIG. 9 showing the operation following FIG. 14 in manufacturing the core structure; FIG. 16 is a view similar to FIG. 9 showing the operation following FIG. 15 in manufacturing the core structure; FIG. 17 is a view similar to FIG. 9 showing the operation following FIG. 16 in manufacturing the core structure; Figure 18 is a view similar to Figure 9 showing the operation following Figure 17 in manufacturing the core structure; Figure 19 is a view similar to Figure 9 showing the operation following Figure 18 in manufacturing the core structure; Figure 20 is a view similar to Figure 9 showing the operation following Figure 19 in manufacturing the core structure; Figure 21 is a view similar to Figure 9 showing the operation following Figure 20 in manufacturing the core structure; Figure 22 is a view similar to Figure 9 showing the operation following Figure 21 in manufacturing the core structure; Figure 23 is a view similar to Figure 9 showing the operation following Figure 22 in manufacturing the core structure; Figure 24 is a view similar to Figure 9 showing the operation following Figure 23 in manufacturing the core structure; Figure 25 is a view similar to Figure 9 showing the operation following Figure 24 in manufacturing the core structure; Figure 26 is a view similar to Figure 9 showing the operation following Figure 25 in manufacturing the core structure; Figure 27 is a view similar to Figure 9 showing the operation following Figure 26 in manufacturing the core structure; Figure 28 is a view similar to Figure 9 showing the operation following Figure 27 in manufacturing the core structure; Figure 29 is a view similar to Figure 9 showing the operation following Figure 28 in manufacturing the core structure; Figure 30 is a view similar to Figure 9 showing the operation following Figure 29 in manufacturing the core structure; Figure 31 is a view similar to Figure 9 showing the operation following Figure 30 in manufacturing the core structure; Figure 32 is a view similar to Figure 9 showing the operation following Figure 31 in manufacturing the core structure; Figure 33 is a view similar to Figure 9 showing the operation following Figure 32 in manufacturing the core structure; Figure 34 is a view similar to Figure 9 showing the operation following Figure 33 in manufacturing the core structure; Figure 35 is a view similar to Figure 9 showing the operation following Figure 34 in manufacturing the core structure; Figure 36 is a view similar to Figure 9 showing the operation following Figure 35 in manufacturing the core structure; Figure 37 is a view similar to Figure 13 showing a core member of another embodiment in which the central hole is provided with a chamfer;

A mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 shows a shutter curtain 1 that opens and closes with a winding shaft having a core structure manufactured by an apparatus and method according to an embodiment of the present invention. The shutter curtain 1 opens and closes an opening 6 such as a doorway surrounded by a pair of left and right guide rails 2, a shutter case 4 in which a winding shaft 3 is housed, and a floor 5. The shutter curtain 1, the main portion of which is formed by vertically connecting the slats 1A, rotates the winding shaft 3, to which the upper end of the shutter curtain 1 is connected, forwardly by an opening and closing device (not shown). The shutter curtain 1 is taken up by the take-up shaft 3, and is let out from the take-up shaft 3 by the reverse rotation of the take-up shaft 3 by the opening/closing device. to open and close. Both ends of the winding shaft 3 in the axial direction are rotatably supported by brackets 9 .

FIG. 2 shows the winding shaft 3 with a part of its length omitted. The winding shaft 3 has shaft neck portions 3A at both ends in the axial direction of the winding shaft 3 and a main body 3B between the shaft neck portions 3A. Each of the shaft necks 3A supported by the winding shaft 3 is formed of a rod-shaped member 7 made of a metal round bar, and the main body 3B is made of a metal round cylinder having a length slightly shorter than the total length of the winding shaft 3. It is formed by a member 8 . In addition, one of the two rod-shaped members 7 on the left and right is attached with a sprocket wheel to which the driving force from the above-described opening and closing machine configured by a combination of an electric motor and a brake is transmitted by a chain, As a result, the winding shaft 3 is rotated forward and backward by the driving force from the opener.

A first core member 11 and a second core member 12 each formed in a disc shape from a metal plate material are attached to each rod-shaped member 7 forming the shaft neck portion 3A so as to be 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, which are spaced apart from each other, have the same thickness dimension and the same outer diameter dimension, on the rod-like member 7, As can be seen from FIG. 3, which is a cross-sectional view taken along the line S3-S3 of 2, at the center of each of the first and second core members 11 and 12, a round hole having an inner diameter slightly larger than the outer diameter of the rod-like member 7 is formed. Center holes 11A and 12A are provided, and after the rod-shaped member 7 is inserted into these center holes 11A and 12A, the rod-shaped member 7 and the first and second core members 11 and 12 are inserted into the first and second core members. On both sides in the thickness direction of the child members 11 and 12, they are joined by welds 14 to 17 that extend over the entire circumference of the rod-shaped member 7, and the first and second cores are attached to the rod-shaped member 7 by these circumferential welds 14 to 17. Members 11 and 12 are joined together.

As shown in FIG. 2, two symmetrical core structures 20 are manufactured by the rod-like member 7 and the first and second core members 11 and 12 described above. Of the members forming the body 20, the first and second core members 11 and 12 are inserted into the cylindrical member 8 forming the main body 3B of the winding shaft 3 to form the first and second core members. By connecting the outer peripheral portions of the child members 11 and 12 to the inner peripheral portion of the cylindrical member 8, the shaft neck portions 3A are provided by the rod-like members 7 of the core structure 20 at both ends of the main body 3B in the axial direction. A winding 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 cylindrical member 8, in FIGS. A plurality of holes 8A shown in FIG. The two 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 end side of the cylindrical member 8 in the axial direction is The entire outer periphery of the second core member 12 is welded to the inner periphery of the cylindrical member 8 by electric welding means using a welding rod inserted into the cylindrical member 8 from the end opening. 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 symmetrical core structures 20 are provided with these end faces. Chamfered portions 7A and 7B are formed by cutting the outer peripheral portion of the rod-shaped member 7, and among these chamfered portions 7A and 7B, the chamfered portion 7A projecting to the outside of the cylindrical member 8 is formed. The end surface of the rod-shaped member 7 is the front end surface 7C of the rod-shaped member 7, and the end surface of the rod-shaped member 7 formed with the chamfered portion 7B disposed inside the cylindrical member 8 is the rear end surface of the rod-shaped member 7. 7D.

FIG. 4 shows a front view of a manufacturing apparatus 30 for the core structure 20 according to one embodiment of the present invention, and FIG. 5 is a plan view of this manufacturing apparatus 30. As shown in FIG. 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 means 31 for holding the rod-shaped member 7, as will be understood later, on the pedestal 30A. A means 32 and a third holding means 33 for holding the rod-shaped member 7 and for rotating the rod-shaped member 7 are arranged with an interval in the left-right direction. The first holding means 31 arranged between the third holding means 33 is fixedly installed on the pedestal 30A. The second holding means 32 is arranged on a slider 35 which is guided by a guide rail 34 and can move forward and backward with respect to the first holding means 31 , and the third holding means 33 is also guided by a guide rail 36 . It is arranged on a slider 37 which is made to move forward and backward with respect to the first holding means 31 . Attached to the slider 35 is a nut member 41 screwed onto a feed screw member 40 to which driving force from an electric motor 38 shown in FIG. 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 forward and reverse rotation of the electric motor 38 . Further, the slider 37 has a nut member 45 screwed onto a feed screw member 44 to which a driving force from an electric motor 42 shown in FIG. With this, the third holding means 33 and the slider 37 are also moved forward and backward with respect to the first holding means 31 by forward and reverse rotation of the electric motor 42 .

6 shows the first holding means 31, where FIG. 6(A) is a left side view and FIG. 6(B) is a front view. The first holding means 31 includes a ring-shaped main body 50 fixedly installed on the pedestal 30A, and first and second holding means 31 held by the first holding means 31 on the side surface of the main body 50 facing the second holding means 32 . Three claw members 51 are arranged at equal angular intervals in the circumferential direction of the core members 11 and 12, and each claw member 51 is a second holding means for the main body 50. It is guided by a guide groove 52 formed in the side surface facing the core members 32 and is movable in the inner and outer radial directions of the first and second core members 11 and 12 . The circular opening 50A provided at the center of the ring-shaped main body 50 allows the first and second cores, including the rod-shaped member 7, to move when the pawl member 51 is moving in the radial direction. It has a size that allows the members 11 and 12 to pass through.

As shown in FIG. 5, an electric motor 54 is attached to the body 50 via a bracket 53, and the driving force of the electric motor 54 is input to the interior of the body 50 via a bevel gear mechanism 55. . A ring-shaped disk member 56 shown in FIG. Since the power is transmitted to the disk member 56 via the bevel gear mechanism arranged inside, the disk member 56 rotates forward or backward according to the rotation direction of the drive shaft of the electric motor 54 . In addition, the disk member 56 is formed with a spiral ridge, and each claw member 51 is provided with a groove that engages with the spiral ridge, so that the disk member 56 is positioned correctly. When rotated, each claw member 51 moves radially inward to hold the first and second core members 11 and 12. When the disk member 56 rotates in the opposite direction, each claw member 51 moves radially outward. By doing so, the holding of the first and second core members 11 and 12 is released.

For this reason, the first holding means 31 has three claw members 51 arranged in the circumferential direction of the first and second core members 11 and 12 so that the inner and outer diameters of the first and second core members 11 and 12 are adjusted. 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. 6(B), a recessed portion 57 recessed on the side opposite to the second holding means 32 is provided at the distal end portion on the inner diameter side of each claw member 51, and these recessed portions 57 is open on the inner diameter side and closed by a wall portion 57A on the outer diameter side.

7 shows the second holding means 32, FIG. 7(A) is a right side view, and FIG. 7(B) is a front view. The second holding means 32 has a ring-shaped main body 60 fixedly installed on the slider 35 shown in FIGS. Three claw members 61 are arranged at equal angular intervals in the circumferential direction of the rod-shaped member 7 to be held. It is guided by a guide groove 62 formed on the side surface facing the rod-like member 31 and is movable in the radially inner and outer directions of the rod-like 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 a bevel gear mechanism 65. A ring-shaped disc member 66 shown in FIG. 7(A) is rotatably accommodated inside the 60 . The driving force of the electric motor 64 input into the main body 60 is transmitted to the disk member 66 via the bevel gear mechanism arranged inside the main body 60, thereby rotating the drive shaft of the electric motor 64 in accordance with the rotation direction. As a result, the disk member 66 rotates forward or backward. Further, the disk member 66 is also formed with a spiral ridge, and each claw member 61 is provided with a groove that engages with the spiral ridge. rotates forward, each claw member 61 moves radially inward to hold the rod-shaped member 7 . release the retention 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 that performs

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

8 shows the third holding means 33, where FIG. 8(A) is a left side view and FIG. 8(B) is a front view. The third holding means 33 includes a ring-shaped main body 70 arranged so as to be rotatable about a horizontal axis on a base 37A fixedly installed on the slider 37 shown in FIGS. and three claw members 71 arranged at equal angular intervals in the circumferential direction of the rod-shaped member 7 held by the third holding means 33 on the side surface facing the first holding means 31. It's becoming Each pawl member 71 is guided by a guide groove 72 formed in a side surface of the main body 70 facing the first holding means 31 and is movable in the inner and outer radial directions of the bar 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 into the main body 70 via a bevel gear mechanism 75, A ring-shaped disc member 76 shown in FIG. 8(A) is rotatably accommodated inside the main body 70 . The driving force of the electric motor 54 input into the main body 70 is transmitted to the disk member 76 via the bevel gear mechanism arranged inside the main body 70 , so that the drive shaft of the electric motor 74 rotates in accordance with the direction of rotation. As a result, the disk member 76 rotates forward or backward. The disk member 76 is also formed with a spiral ridge, and each pawl member 71 is provided with a groove that engages with the spiral ridge. Each claw member 71 holds the rod-shaped member 7 by moving in the inner diameter direction, and when the disc 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 that performs

A ring gear 77 connected to the main body 70 is provided in the third holding means 33 , and in order to connect the main body 70 and the ring gear 77 , the main body 70 and the ring gear 77 are mounted at the center of the ring-shaped main body 70 . A cylindrical connecting member is provided for connecting the As shown in FIGS. 4 and 5, a ring gear 77 extending over the entire circumference of the main body 70 is meshed with a gear 80 rotated by an electric motor 79 attached to the base 37A via a bracket 78. Therefore, the driving force of the electric motor 79 causes the main body 70 to rotate 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. FIG.

For this reason, the three claw members 71 of the third holding means 33 are moved by the electric motor 74 in the radial direction of the rod member 7 and rotated by the electric motor 79 about the horizontal axis. When the claw members 71 hold the rod-shaped member 7 , the rod-shaped member 7 is also rotated by the rotation of these claw members 71 .

Therefore, in the third holding means 33, when the three claw members 71 hold the rod-shaped member 7 as will be described later, the electric motor 79 causes the main body 70 and the three claw members 71 to move the horizontal axis. It rotates around the center. In order to realize this operation, when the main body 70 and the three claw members 71 are rotated around the horizontal axis by the electric motor 79, the driving force of the electric motor 74 causes the three claw members 71 to move into rod-like shapes. The power supply circuit of the electric motor 74 is energized while the body 70 and the three pawl members 71 are being rotated about the horizontal axis by the electric motor 79. The movement of the three claw members 71 holding the bar member 7 in the outer diameter direction is blocked by the operation of an electromagnetic brake or the like (not shown).

As shown in FIG. 5, in the apparatus 30 for manufacturing 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 2 supply means 85 for supplying the rod-shaped member 7 to the holding means 32; first welding means 86 for spot-welding the first and second core members 11 and 12 to 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 bar member 7 is provided, and a supply means 85 for these and an electric welding means using a welding rod are provided. The first and second welding means 86, 87 are, for example, moved back and forth and left and right with respect to the first to third holding means 31 to 33 by a robot. In addition, 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 . The first and second welding means 86, 87 may be one common welding means.

Next, a procedure for manufacturing the core structure 20 shown in FIG. 2 by the manufacturing apparatus 30 shown in FIGS. 4 and 5 will be described with reference to FIGS. 9 to 36. FIG. This operation, which will be described below, is performed by a sequence means of a computer program for the electric motors 38 and 42 shown in FIG. 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 the

As shown in FIG. 9, first, the rod-shaped member 7 was supplied to the second holding means 32 by the supply means 85 of FIG. 10, the first core member 11 is supplied by the supply means 85 to the first holding means 31, and the first core member 11 is It is held by the pawl member 51 moved in the radial direction of the holding means 31 . This holding is performed by sandwiching the outer peripheral portion of the first core member 11 between the outer diameter wall portions 57A of the recessed portions 57 of the claw members 51 shown in FIG. will be After that, as shown in FIG. 11, the second holding means 32 advances toward the first holding means 31, and this advance causes the distal end surface 7C of the bar member 7, which is 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 slightly moves 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 of the recessed portion 57 in the inner and outer diameter directions. Therefore, the first core members 11 do not drop off from the claw members 51, and thus the first core members 11 are held by the first holding means 31 while being held, but the holding is relaxed. It will be.

FIG. 13 shows a partially enlarged view of FIG. 12 at this time, showing the first core member 11 as a cross section. As described with reference to FIG. 2, the tip end face 7C of the rod-like member 7 is provided with a chamfered portion 7A formed by cutting the outer peripheral face of the tip end face 7C. For this reason, the central axis N1 of the rod-like member 7 and the central axis N2 of the aforementioned central hole 11A provided in the central portion of the first core member 11 are aligned vertically or longitudinally (in FIG. 13, the plane of the paper). 14, when the second holding means 32 advances toward the first holding means 31, the chamfered portion 7A causes the first holding means 31 to When the first core member 11, whose holding is relaxed, moves in the vertical direction and the front-back direction in the inner and outer diameter directions, the misalignment is eliminated. It is inserted into the center 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-rear direction. Even if vertical or longitudinal misalignment occurs between the central axis N1 and the central axis N2 of the central hole 11A of the first core member 11, the chamfered portion 7A eliminates such errors and misalignment. , the rod-shaped member 7 can be inserted into the center hole 11A of the first core member 11 from the tip surface 7C, and the first core member 11 can be arranged on the rod-shaped member 7. As shown in FIG.

15 and 16 show the post-operation of FIG. 14, and as shown in FIG. As shown, the second holding means 32 holding the bar 7 are withdrawn 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 supplying means 85, and the second core member 12 is pushed in the radial direction of the first holding means 31. 10, this holding is carried out at the recessed portions 57 of the respective claw members 51 shown in 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 this advance brings the tip surface 7C of the bar member 7 closer to the first core member 11. Occasionally, each pawl member 51 of the first holding means 31 moves radially a little, thereby loosening the holding of the second core member 12 by the first holding means 31 . 12, the amount of movement of the pawl member 51 in the outer diameter direction is sufficiently smaller than the length of the recessed portion 57 in the inner and outer diameter directions. The child members 12 do not drop off from the respective claw members 51, so that the holding of the second core members 12 by the first holding means 31 is maintained while the holding is relaxed.

After that, as shown in FIG. 19, the second holding means 32 holding the rod-shaped member 7 moves forward toward the first holding means 31, and at this time also, the first holding means in the manufacturing apparatus 30 31 and the second holding means 32 have errors in the vertical direction and the longitudinal direction, the center axis of the rod-shaped member 7 and the center axis of the center hole 12A of the second core member 12 are vertically misaligned. Even if there is misalignment in the front-rear direction, the second core member 12, whose holding by the first holding means 31 is relieved by the chamfered portion 7A, moves in the vertical and front-rear inner and outer radial directions. The misalignment is eliminated, so that the rod-shaped member 7 can be inserted into the center hole 12A of the second core member 12 from the tip surface 7C.

Next, as shown in FIG. 20, the claw member 51 of the first holding means 31 moves radially inward to firmly hold the second core member 12, and this firm holding causes the center hole 12A to close. 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 center hole 12A, the second core member 12 is in an upright state on the rod-shaped member 7. will be placed. After that, as shown in FIG. 21, the second core member 12 is spot welded to the bar member 7 by the first welding means 86 shown in FIG. The member 12 is positioned on the rod-shaped member 7 and temporarily joined.

Thereafter, as shown in FIG. 22, the claw members 51 of the first holding means 31 move radially outward to release the second core member 12, and furthermore, as shown in FIG. As shown, 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 on the bar member 7 passes through the circular opening 50A of the main body 50 of the first holding means 31 shown in FIG. The core member 11 moves to a position that coincides 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 thereafter, as shown in FIG. The rod-shaped member 7 is held by the third holding means 33 by moving the claw member 71 in the radial direction. Next, as shown in FIG. 26, each claw member 51 of the first holding means 31 moves in the radial direction, and the amount of movement at this time is the wall portion 57A of the recessed portion 57 of the claw member 51. is smaller than the amount of movement for clamping the outer peripheral portion of the first core member 11, and the amount of movement by which the claw member 51 relaxes and holds the first core member 11 as in the case of FIG. The amount of movement is about the same.

After this, as shown in FIG. 27, the claw members 61 of the second holding means 32 move radially outward, and then, as shown in FIG. 1 Move forward a little toward the holding means 31 side. According to this, coil springs 68, which are elastic members shown in FIG. , and the holding of the first core member 11 by the pawl member 51 of the first holding means 31 is relaxed. 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 1 The core member 11 is placed upright on the rod-like member 7 .

After the first core member 11 is placed upright on the rod-shaped member 7 in this way, the third holding means 33 holding the rod-shaped member 7, as shown in FIG. Retract from the first holding means 31 . As a result, the arrangement position of the first core member 11 on 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 first core member 11 is arranged at a position close to the rear end surface 7D of the rod-shaped member 7 opposite in the length direction from the front end surface 7C. As a result, the first core member 11 is arranged at the same position as that of the first core member 11 in the longitudinal direction of the bar member 7 shown in FIG.

Next, as shown in FIG. 30, each claw member 51 of the first holding means 31 moves inwardly to firmly hold the first core member 11, whereby the first core member 11 continues to stand upright on the bar member 7 . After this, the second retaining means 32 are withdrawn from the first retaining means 31, as shown in FIG. 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 joined to the rod-like member 7 by the spot welded portion 91, and as a result, as shown in FIG. , and the first core member 11 is released, the first core member 11 remains upright on the bar member 7 .

Before the first core member 11 is positioned and temporarily joined to the bar member 7 by the spot welded portion 91 by the first welding means 86, the second holding means 11, as shown in FIGS. 32 is retracted from the first holding means 31 because, as described above, the arrangement position of the first core member 11 on the rod-shaped member 7 is changed to the first position in the length direction of the rod-shaped member 7 shown in FIG. When the leading end surface 7C of the rod-shaped member 7 is changed to a position close to the rear end surface 7D on the opposite side in the length direction of the rod-shaped member 7 so as to be the same as the arrangement position of the core member 11, the first holding means This is to ensure a sufficiently large space for inserting the first welding means 86 between 31 and the second holding means 32 . 14 and 15, since the bar member 7 is held by the claw members 61 of the second holding means 32 over the long dimension, the first holding means 31 By carrying out the operation of firmly holding the first core member 11 with the claw member 51, 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. 32, the first core member 11 is connected to the rod-shaped member 7, and the rod-shaped member 7 from the first core member 11 is connected to the rod-shaped member 7 by this temporary connection. can be arranged with a small amount of protrusion of the rear end surface 7D.

After that, as shown in FIG. 34, the third holding means 33 holding the rod-like member 7 on which the first and second core members 11 and 12 are arranged by the claw members 71 is attached to the first holding means 31 . , and then, as shown in FIG. 35, each claw member 71 of the third holding means 33 rotates around the horizontal axis to move the bar member 7 and the first and second core members 11 and 12 also rotate around the horizontal axis. During this rotation, one side in the thickness direction of the second core member 12 is welded along the entire circumference of the rod-shaped member 7 by the second welding means 87 shown in FIG. The child member 12 is joined to the bar member 7 by a full-circumference weld 17 which is also shown in FIG. After that, the bar member 7 and the first and second core members 11 and 12 are rotated around the horizontal axis by the claw member 71, and as shown in FIG. 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 are welded over the entire circumference of the rod-shaped member 7 . 2, and the first core member 11 is welded by the all-around weld 16, also shown in FIG. 14 and 15 are connected to the bar member 7, respectively.

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 drawings, after the rod member 7 and the first and second core members 11 and 12 have stopped rotating around the horizontal axis, the claw members 71 of the third holding means 33 are After that, the core structure 20 is removed from the third holding means 33 by a removal means (not shown). Note that this take-out operation may be performed by the supply means 85 shown in FIG.

FIG. 37 shows first and second core members 11' and 12' according to another embodiment. The center holes 11A' and 12A' provided as round holes in the center portions of these first and second core members 11' and 12' are provided with the rod-like members 7 in these center holes 11A' and 12A'. A chamfered portion 92 is formed on the inner peripheral portion of the end portion on the side where the tip surface 7C is inserted. According to this, as described above, the installation accuracy of the first holding means 31 and the second holding means 32 in the manufacturing apparatus 30 includes errors in the vertical direction and the front-rear direction. Even if there is a large misalignment between the central axis N1 and the central axis N2 of the central holes 11A' and 12A' of the first and second core members 11' and 12' in the vertical direction and the longitudinal direction, the chamfered portion 92 , and the chamfered portion 7A formed on the outer peripheral portion of the tip end surface 7C of the rod-shaped member 7, such an error and misalignment are eliminated, and the rod-shaped member 7 is moved from the tip end surface 7C to the first and second It can be inserted into the center holes 11A', 12A' of the core members 11', 12'.

INDUSTRIAL APPLICABILITY The present invention is used to manufacture a core structure that constitutes a winding shaft for a shutter curtain that opens and closes an opening such as a doorway or a shutter curtain that forms a fireproof compartment when fully closed. be able to.

Reference Signs List 1 shutter curtain 3 winding shaft 3A shaft neck portion 3B main body 7 rod-shaped member 7A chamfered portion 7C tip surface 8 cylindrical member 11, 11' first core member 11A, 11A' center hole 12, 12' second core member 12A, 12A' center hole 20 core structure 30 manufacturing device 31 first holding means 32 second holding means 33 third holding means 51, 61, 71 claw member 57 depression 68 coil spring which is an elastic member 85 rod-shaped member and Feeding means for feeding the first and second core members 86 First welding means for spot welding the first and second core members to the bar member 87 First and second core members to the bar member second welding means for all-around welding 92 chamfer

Claims (10)

A rod-shaped member forming a shaft neck portion at an axial end of a winding shaft for winding the shutter curtain so as to be unrolled; The member is inserted into the rod-shaped member and welded to the rod-shaped member to form the main body of the winding shaft. A device for manufacturing a core structure of a winding shaft for a shutter curtain, comprising:
First holding means for holding the core member and second holding means for holding the rod-shaped member are provided. into the center hole of the core member, the outer peripheral portion of the tip end face of the rod-like member and the tip end face of the center hole are inserted A chamfered portion is provided on at least one of the inner peripheral portion of the end on the side to be pulled, and at least one of the first holding means and the second holding means has the tip end face that is the center hole. When inserted into the, the holding is relaxed ,
The first holding means 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,
The state in which the holding is relaxed means that the plurality of claw members of the scroll chuck type holding means move slightly in the outer diameter direction while maintaining the holding,
The state in which the holding is relaxed is performed in the first holding means, and the pawl member of each of the second holding means is attached to each of the first holding means in which the holding of the core member is relaxed. 2. An apparatus for manufacturing a core structure of a winding shaft for a shutter curtain, wherein an elastic member for elastically pressing the core member is attached to the claw member of . 2. The apparatus for manufacturing a core structure of a shutter curtain winding shaft according to claim 1, wherein the number of said plurality of claw members of said first holding means is equiangularly spaced in the circumferential direction of said core member. and the number of the plurality of claw members of the second holding means is also three arranged at equal angular intervals in the circumferential direction of the rod-shaped member. Manufacturing equipment for the core structure of the winding shaft for curtains. 3. The apparatus for manufacturing a core structure of a winding shaft for a shutter curtain according to claim 1 , wherein the inner diameter side of the tip portion of each of the claw members of the first holding means is open on the inner diameter side, and In the state where the outer diameter side is closed and 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, wherein the child member is elastically pressed against the recessed portion by the elastic member. 4. The apparatus for manufacturing a core structure for a shutter curtain winding shaft according to claim 3, wherein the recessed portion of each of the claw members of the first holding means is closed on the outer diameter side by a wall portion. The state in which the holding of the core member by the first holding means is relaxed means that the wall portion of each of the pawl members of the first holding means is held by the core member. An apparatus for manufacturing a core structure of a winding shaft for a shutter curtain, characterized in that the outer peripheral portion is not clamped. 5. The apparatus for manufacturing a core structure for a shutter curtain winding shaft according to claim 3 or 4 , wherein the core member elastically pressed by the elastic member is spotted on the rod-shaped member in each of the recesses. An apparatus for manufacturing a core structure of a winding shaft for a shutter curtain, comprising welding means for welding. 6. The apparatus for manufacturing a core structure for a shutter curtain winding shaft according to claim 1 , wherein the rod-shaped member on which the core member is arranged is held and rotated. A shutter curtain comprising: third holding means; and 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. manufacturing equipment for the core structure of the winding shaft. 7. The apparatus for manufacturing a core structure of a shutter curtain winding shaft according to claim 1, wherein said elastic member is a coil spring. body manufacturing equipment. A rod-shaped member forming a shaft neck portion at an axial end of a winding shaft for winding the shutter curtain so as to be unrolled; The member is inserted into the rod-shaped member and welded to the rod-shaped member to form the main body of the winding shaft. A method for manufacturing a core structure for a shutter curtain winding shaft comprising: a core member coupled to an inner peripheral portion of the member;
a work step for providing a chamfered portion on at least one of the outer peripheral portion of the tip end face of the rod-shaped member and the inner peripheral portion of the end portion of the center hole on the side where the tip end face is inserted;
a working step for holding the core member by the first holding means and holding the rod-shaped member by the second holding means;
for advancing 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 center hole of the core member; work process;
a working step for setting at least one of the first holding means and the second holding means to a state in which the holding is relaxed when the tip surface is inserted into the center hole;
including
The first holding means 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,
The state in which the holding is relaxed means that the plurality of claw members of the scroll chuck type holding means moves slightly in the outer diameter direction while maintaining the holding,
The state of relaxing the holding is performed in the first holding means,
each of the claw members of the second holding means is provided with an elastic member for elastically pressing the core member against each of the claw members of the first holding means,
A take-up for a shutter curtain, wherein the elastic member elastically presses the core member against the claw member of each of the first holding means in the state in which the holding is relaxed. A method for manufacturing a shaft core structure. In the manufacturing method of the core structure of the winding shaft for shutter curtain according to claim 8,
After the working step for achieving the state in which the holding is relaxed, the claw members of the first holding means are moved in the inner diameter direction so that the core member is firmly held by the first holding means. a working process that holds to
a work step of temporarily joining the core member to the rod-shaped member by spot welding;
A method for manufacturing a core structure of a winding shaft for a shutter curtain, comprising: 10. The method of manufacturing a core structure for a shutter curtain winding shaft according to claim 9, wherein after the working step of temporarily joining the core member to the rod-shaped member by spot welding, the core member is attached to the rod-shaped member. A work process of joining to a member by all-around welding;
A method for manufacturing a core structure of a winding shaft for a shutter curtain, comprising:

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