JP2011057235A - Sheet material winding apparatus, sheet material winding method, and method for manufacturing refractory double pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet material winding apparatus capable of winding a sheet material with no gap on the outer peripheral part of an article with a cylindrical part such as a refractory double-pipe joint, fixing it, and attempting to perform efficiency of a work, and to provide a sheet material winding method, and a method for manufacturing the refractory double-pipe joint using this. <P>SOLUTION: The sheet material winding apparatus 1, which winds the sheet material S on the outer peripheral face of a receiving opening part W2 of a synthetic resin-made inner pipe W, includes: a revolution mechanism 2 for revolving the sheet material S whose end part is delivered from a roll R on the outer peripheral side of the receiving opening part W2; a fastening mechanism 3 which fastens the sheet material S revolved on the outer peripheral side of the receiving opening part W2 and overlaps a winding starting part and a winding end part of the sheet material S; and a heat-pressing mechanism 80 which heats the overlapped part of the sheet material S while pressing toward the receiving opening part W2, and heat-welds the overlapped part and the receiving opening part W2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sheet material winding device, a sheet material winding method, and a method for manufacturing a fireproof two-layer pipe joint using the same. More specifically, a sheet material winding apparatus, a sheet material winding method and a fireproof two-layer pipe joint using the sheet material winding apparatus capable of winding a strip-shaped sheet material around an outer peripheral surface of an article having a cylindrical portion at high speed Regarding the method.

  Conventionally, synthetic resin pipes such as vinyl chloride and polyethylene terephthalate are lighter than metal pipes and have excellent chemical resistance, impact resistance, etc., so they are used for drain pipes, ventilation pipes, etc. . However, since the synthetic resin pipe is inferior in fire resistance, there is a risk that the fire spreads and is burned out in the event of a fire and toxic gas is generated. Therefore, a fireproof two-layer pipe in which the outer peripheral surface of the synthetic resin pipe is covered with a fiber-containing cement mortar layer is generally used.

  In the joint having the above two-layer structure for connecting the fireproof two-layer pipe (fireproof two-layer pipe joint), the cement mortar layer may be cracked. One of the causes of this crack is the difference in thermal expansion coefficient between the synthetic resin pipe (synthetic resin inner pipe) and the cement mortar layer. In other words, the coefficient of thermal expansion of synthetic resin pipes is almost an order of magnitude larger than that of cement mortar. Therefore, if the outer peripheral surface of the synthetic resin pipe is covered with cement mortar as it is, the stress and cement mortar generated by temperature changes during drainage etc. Due to drying shrinkage, cracks occur in the cement mortar. In addition, cracks may occur in the cement mortar due to the stress generated by the joint being pushed and spread by the straight pipe during construction for connecting the joint and the straight pipe.

As one means for preventing this crack, a cushioning material layer such as paper is provided on the outer peripheral surface of a synthetic resin tube, and the top is covered with a cement mortar layer (see, for example, Patent Document 1).
In order to provide this buffer material layer, it is necessary to wrap paper or the like around the outer peripheral surface of the synthetic resin tube and fix it with an adhesive, but conventionally this operation has been performed exclusively by hand. For this reason, there are problems that production efficiency is low and labor costs are high.

  Here, as a device for automatically winding a belt-like sheet around the outer peripheral surface of an article at high speed, an automatic binding device for automatically binding objects to be bound such as postcards and envelopes with a belt-like tape is known. (For example, refer to Patent Document 2). In this automatic binding device, the tape fed out from the roll is wound around the object to be bound, and the outer surface of the tape winding start portion and the inner surface of the winding end portion are polymerized, and the heating portion of the heater is heated to this overlapping portion. The polymerized portion of the tape is heat-sealed by pressing. As a result, the objects to be bound are bound by the loop tape. A receiving plate is interposed between the overlapped portion of the tape and the object to be bound, and the receiving plate prevents burning of the object to be bound due to the heat of the heating and pressing mechanism.

  In this automatic bundling apparatus, a tape having a thickness of several tens of μm formed by laminating a thin resin film on paper is used as the tape. The tape is heat-sealed by melting the resin film in the heat pressing mechanism.

JP 2004-197626 A JP 2005-247373 A

By the way, when the buffer material layer is provided on the outer peripheral surface of the synthetic resin tube, the buffer material layer needs to be adhered to the outer peripheral surface without a gap and fixed to the outer peripheral surface to such an extent that the buffer material layer does not peel off. .
However, in the automatic binding device described in Patent Document 2, since the tape is simply wound around the object to be bound, the tape cannot be fixed to the object to be bound. In addition, since the receiving plate is interposed between the overlapped portion of the tape and the object to be bound, a gap is generated between the tape and the object to be bound at the time of binding.
Therefore, there is a problem that the automatic bundling device cannot be diverted for winding the buffer material layer around the synthetic resin tube, and the work efficiency cannot be improved.

  The present invention has been made in view of such a problem, and can wrap and fix a sheet material around an outer peripheral portion of an article having a cylindrical portion such as a refractory two-layer pipe joint without any gaps. It is an object of the present invention to provide a sheet material winding device, a sheet material winding method, and a method for manufacturing a fireproof two-layer pipe joint using the sheet material winding apparatus, which can improve efficiency.

  In order to solve the above problems, the present inventors can improve the conventional automatic bundling device and fasten and fix a sheet material as a cushioning material around a cylindrical outer surface of an article having a cylindrical portion at high speed. Thus, it has been found that by using this sheet material winding device, a fire-resistant two-layer pipe joint can be manufactured with low production cost and high production efficiency. That is, the present invention relates to the following sheet material winding apparatus, sheet material automatic winding method, and method for manufacturing a fireproof two-layer pipe joint using the same.

[1] A sheet material winding device that winds a sheet material around an outer peripheral surface of a cylindrical portion of a work, and the sheet material, the end portion of which is fed out from a roll, is rotated around the outer peripheral side of the cylindrical portion of the work. A winding mechanism, a tightening mechanism for tightening the sheet material that has been wound around the outer peripheral side of the cylindrical part to the outer peripheral surface of the cylindrical part and superimposing a winding start part and a winding end part of the sheet material, A sheet material winding apparatus, comprising: a heating and pressing mechanism that heats the overlapping portion of the sheet material while pressing the overlapping portion toward the cylindrical portion, and thermally welds the overlapping portion and the cylindrical portion.

[2] The sheet material winding device according to [1], further including a work support portion that supports the work against the pressure of the heating and pressing mechanism.

[3] In the above [1] or [2], the sheet material is any one of a polyester nonwoven fabric, a resin fiber nonwoven fabric made of nylon, polypropylene, or polyethylene, and a foamed resin sheet made of urethane, polypropylene, or polystyrene. The sheet | seat material winding apparatus of description.

[4] The work is a synthetic resin inner pipe in a fireproof two-layer pipe joint, and the cylindrical portion is a receiving portion of the synthetic resin inner pipe. ] The sheet | seat material winding apparatus as described in any one of.

[5] The sheet material winding according to any one of [1] to [4], wherein the heating and pressing mechanism is provided with any one of an uneven shape, a sword mountain shape, and a cylindrical surface shape. apparatus.

[6] The sheet material winding device according to any one of [1] to [5], wherein the heating and pressing mechanism is coated with a fluorine-based resin.

[7] The sheet material according to any one of [1] to [6], wherein the heating and pressing mechanism is swingable so as to follow an outer peripheral surface of the cylindrical portion. Winding device.

[8] The sheet material winding apparatus according to any one of [1] to [7], wherein the heating and pressing mechanism includes a timer mechanism that controls a time for pressing the overlapping portion.

[9] A first step in which the sheet material, the end portion of which is fed out from the roll body, is circulated to the outer peripheral side of the cylindrical portion of the workpiece, and the outer periphery of the cylindrical portion is the circulated sheet material. A second step of polymerizing a winding start portion and a winding end portion of the sheet material by clamping to a surface, and heating while pressing the polymerization portion of the sheet material against the cylindrical portion, and the polymerization portion and the cylinder A sheet material winding method comprising: a third step of thermally welding the shape portion.

[10] The sheet material according to [9], wherein the sheet material is any one of a polyester nonwoven fabric, a resin fiber nonwoven fabric made of nylon, polypropylene, or polyethylene, and a foamed resin sheet made of urethane, polypropylene, or polystyrene. Winding method.

[11] The work is a synthetic resin inner pipe in a fireproof two-layer pipe joint, and the cylindrical portion is a receiving portion of the synthetic resin inner pipe [9] or [10] ] The sheet | seat material winding method of description.

[12] A refractory double layer comprising a step of winding the sheet material around a receiving portion of a synthetic resin inner pipe in the refractory double layer pipe joint by the sheet material winding method according to [11]. Manufacturing method of pipe joint.

According to the sheet material winding device and the sheet material winding method of the present invention, the sheet material can be wound and fixed without a gap on the outer periphery of a work having a cylindrical portion such as a fireproof two-layer pipe joint. Work efficiency can be improved.
That is, instead of the conventional work of wrapping paper around the receiving portion of the synthetic resin inner pipe of the fireproof two-layer pipe joint and fixing with an adhesive, the sheet material winding device and the sheet material winding of the present invention are used. By using the turning method, a fireproof two-layer pipe joint can be manufactured with low production cost and high production efficiency.

It is a perspective view showing a schematic structure of a sheet material winding device concerning an embodiment. It is a front view which shows schematic structure of the sheet | seat winding apparatus which concerns on embodiment. It is a longitudinal cross-sectional view of a synthetic resin inner pipe. It is a perspective view of a support mechanism and a heating press mechanism. It is a perspective view of a support mechanism. It is a figure explaining the positional relationship of a receptacle part, a workpiece | work support part, a sheet | seat support part, and a heating press mechanism. It is a perspective view of a heating press mechanism. It is a side view of a heating press mechanism. It is a figure explaining the shape of a heating press surface. It is process drawing of the sheet material winding method by the sheet material winding apparatus of embodiment. It is process drawing of the sheet material winding method by the sheet material winding apparatus of embodiment. It is process drawing of the sheet material winding method by the sheet material winding apparatus of embodiment. It is process drawing of the sheet material winding method by the sheet material winding apparatus of embodiment. It is process drawing of the sheet material winding method by the sheet material winding apparatus of embodiment. It is process drawing of the sheet material winding method by the sheet material winding apparatus of embodiment. FIG. 16 is a partially enlarged view of FIG. 15. It is process drawing of the sheet material winding method by the sheet material winding apparatus of embodiment. FIG. 18 is a partially enlarged view of FIG. 17. It is a front view which shows the state which wound and fixed the sheet | seat material around the receptacle part outer peripheral surface of the synthetic resin inner pipes.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A sheet material winding apparatus 1 shown in FIGS. 1 and 2 is an apparatus for winding a sheet material S fed from a roll R around a receiving port W2 of a synthetic resin inner tube W as a work, and includes a winding mechanism 2 and The sheet material S is wound around the receiving port W2 by the tightening mechanism 3, and the sheet material S and the receiving port W2 are thermally welded by the heating and pressing mechanism 80.

The synthetic resin inner tube W to be wound with the sheet material S by the sheet material winding device 1 is a member used when manufacturing a fireproof two-layer pipe joint, and as an example, a synthetic material such as hard vinyl chloride is used. An elbow tube made of resin is shown in FIG.
That is, the synthetic resin inner tube W includes a bent tube portion W1 bent so as to be orthogonal to each other, and receiving portions W2, W2 that are continuous in a cylindrical shape at both ends of the bent tube portion W1. It is set as the structure provided with.
In addition to the 90 degree elbow tube shown in FIG. 3, members used for the fireproof two-layer pipe joint include various shapes and sizes such as a 45 degree elbow tube, a Y-shaped tube, and a T-shaped tube.

  The sheet material S is wound around the outer peripheral surface of the receiving portion W2 of the synthetic resin inner pipe W as a buffer material, and a cement mortar layer is formed so as to cover the sheet material S, thereby providing two layers of fireproofing. Pipe fittings are manufactured. The sheet material winding device 1 of this embodiment is used for winding and fixing a sheet material on the outer peripheral surface of the receiving port W2 of the synthetic resin inner pipe W.

As shown in FIGS. 1 and 2, the sheet material winding apparatus 1 includes an apparatus main body 10 on which a roll R for feeding out a sheet material S is installed, a pair of guide portions 20 and 21, a feed roller 30, and a tightening device. The roller 40, the clamping unit 50, the reverse clamping unit 60, the support mechanism 70 including the sheet support unit 71 and the workpiece support unit 72, and the heating and pressing mechanism 80 are schematically configured.
The circling mechanism 2 is composed of a feed roller 30, guide parts 20 and 21, and a reverse clamping part 60, and the tightening mechanism 3 is composed of a tightening roller 40 and a sheet support part 71. Yes.

  The apparatus main body 10 is a casing having a substantially rectangular parallelepiped box shape, and an upper surface thereof is formed by a table 11. The table 11 is for placing the synthetic resin inner pipe W as a workpiece, and the table 11 passes through the front side of the apparatus main body 10 along the front surface 10a. Grooves (not shown) are formed. The passage groove is a passage through which the sheet material S passes when the sheet material S is wound. The synthetic resin inner tube W is placed on the table 11 so that the receiving port W2 is positioned on the passage groove.

  In the following description, the horizontal direction along the front surface 10a of the apparatus main body 10 is the left-right direction X, the horizontal direction orthogonal to the left-right direction X (the depth direction in FIG. 2) is the front-rear direction Y, and the left-right direction X and front-rear direction. A vertical direction orthogonal to Y will be referred to as an up-down direction Z.

  Both end surfaces in the left-right direction X of the apparatus main body 10 are a left side surface 10b and a right side surface 10c, respectively. Further, a roll R is installed at a position near the left side surface 10b inside the apparatus main body 10 so as to be rotatable around a roll support shaft 10d along the front-rear direction Y. This roll R is formed by winding a sheet material S. In this embodiment, a polyester (polyethylene terephthalate) nonwoven fabric having a thickness of 0.44 mm, for example, is used as the sheet material S.

  The sheet material S may employ a resin fiber nonwoven fabric such as nylon, polypropylene, or polyethylene, or a foamed resin sheet such as urethane, polypropylene, or polystyrene, in addition to the polyester nonwoven fabric.

  The guide portions 20 and 21 are installed so as to protrude upward from the table 11 at both ends of the passage groove on the table 11, and the guide portions 20 and 21 face upward from the lower side. Guide surfaces 20a and 21a extending in a curved manner are formed respectively. The guide surfaces 20a and 21a guide the travel of the sheet material S, and have a role of smoothly forming a loop of the sheet material S and maintaining the loop shape.

  The feed roller 30 is provided at a position slightly closer to the roll R than the center in the left-right direction X in the table 11, and feeds the sheet material S fed from the roll R. The feed roller 30 includes a driving roller 30a disposed on the lower side and a driven roller 30b disposed on the upper side. The sheet material S can be sandwiched between the driving roller 30a and the driven roller 30b. Yes.

  The driving roller 30a disposed on the lower side of the feed roller 30 can be driven to rotate about a rotation axis along the front-rear direction Y by an electric motor (not shown), and the driven roller 30b disposed on the upper side is front-rear. It can be freely rotated around a rotation axis extending in the direction Y. Then, the sheet material S is fed out by rotating the driving roller 30a counterclockwise in a state where the sheet material S is sandwiched between the driving roller 30a and the driven roller 30b. That is, the sheet material S fed from the roll R is fed by the feed roller 30 from the guide surface 20a of the guide portion 20 near the right side surface 10c toward the guide surface 21a of the guide portion 21 near the left side surface 10b. The loop by the sheet material S is expanded.

  The driven roller 30b of the feed roller 30 can be displaced in the vertical direction Z, whereby the sheet material S can be sandwiched and released by the driven roller 30b and the driving roller 30a.

  The clamping roller 40 is disposed adjacent to the right side surface 10c side of the feeding roller 30, that is, adjacent to the feeding side of the sheet material S, and pulls back the sheet material S fed by the feeding roller 30. It is.

  The driving roller 40a disposed on the lower side of the tightening roller 40 can be driven to rotate about a rotation axis along the front-rear direction Y by an electric motor (not shown), and the driven roller 40b disposed on the upper side is front-rear. It can be freely rotated around a rotation axis extending in the direction Y. Then, the sheet material S is pulled back by the drive roller 40a rotating clockwise while the sheet material S is sandwiched between the drive roller 40a and the driven roller 40b. That is, the tightening roller 40 pulls back the sheet material S to reduce the loop of the sheet material S.

Of the tightening roller 40, the driven roller 40b can be displaced in the vertical direction Z, whereby the sheet material S can be sandwiched and released by the driven roller 40b and the driving roller 40a.
Further, when the driven roller 30b of the feed roller 30 is displaced downward and the sheet material S is sandwiched between the driven roller 30b and the driving roller 30a, the clamping roller 40 has the driven roller 40b upward. The sheet material S is opened by being displaced. On the other hand, when the driven roller 40b of the tightening roller 40 is displaced downward and the sheet material S is sandwiched between the driven roller 40b and the drive roller 40a, the driven roller 30b is displaced upward. By doing so, the sheet material S is opened.
As a result, the sheet material S is sandwiched by either the feed roller 30 or the tightening roller 40.

The clamping unit 50 is arranged on the right side surface 10c side of the clamping roller 40, that is, on the feeding side of the sheet material S, and is fixed so that the sheet material S extending from the clamping roller 40 to the feeding side can be clamped from above and below. It comprises a side clamping member 51 and a moving side clamping member 52.
The fixed holding member 51 disposed above is fixed to the apparatus main body 10, and the movable holding member 52 disposed below is moved up and down in conjunction with a transition mechanism (not shown) that can move in the vertical direction. It is like that.

The inversion pinching portion 60 is disposed on the right side surface 10c side of the pinching portion 50, that is, immediately downstream of the pinching portion 50, and is movable in the front-rear direction Y and the vertical direction Z while pinching the sheet material S. And a member that is rotatable about an axis along the front-rear direction Y.
In other words, the reversing pinching portion 60 can move up and down the distance from the height of the fixed pinching member 51 to the height close to the table 11 and can advance to the passing groove side by moving back and forth in the front-rear direction Y. It is said that. In addition, the reversing and clamping unit 60 rotates once while changing the position of the clamping members 61 and 62 when moving the above-described distance between the upper and lower sides.

Moreover, the reverse clamping part 60 is comprised by a pair of clamping members 61 and 62, and a pair of clamping members 61 and 62 is comprised by a pair of steel leaf | plate springs piled up mutually, and said front-back direction Y The sheet material S is clamped by advancing into the passage groove by moving forward and backward.
In this way, a loop is formed at the end of the sheet material S as the reversing and clamping unit 60 makes the one rotation while holding the sheet material S.

  The support mechanism 70 includes a sheet support portion 71 that clamps the sheet material S between the outer peripheral surface of the synthetic resin inner tube W and the outer peripheral surface of the synthetic resin inner tube W, and an inner peripheral surface of the receiving port portion W2 of the synthetic resin inner tube W. And a work support portion 72 that supports the receiving portion W2 against pressing from below, as shown in FIG. 4, the details are configured to work with a heating and pressing mechanism 80 described later. Yes.

  As shown in detail in FIG. 5, the support mechanism 70 includes a first swing arm 73 extending substantially in the vertical direction. The first swing arm 73 has a substantially central portion extending in the left-right direction X. Is supported by a first support shaft 73a extending along the shaft. Accordingly, the first swing arm 73 can be rotated along a plane including the front-rear direction Y and the up-down direction Z, that is, along the YZ plane.

The upper end side of the first swing arm 73 is connected to the other end of a coil spring 75 whose one end is fixed to the apparatus body 10, whereby the first swing arm 73 has its upper end in the front-rear direction Y. It is urged toward the front side, that is, the advance direction.
Further, a cylindrical cam follower 74 is provided on the lower end side of the first swing arm 73 so as to protrude toward the right side in the left-right direction X. The outer peripheral surface of the cam follower 74 is in contact with the outer peripheral surface of the first cam 78 fixed to the first drive shaft 77 extending along the left-right direction Y.

  The first drive shaft 77 is rotatable about its axis by a drive motor 76 disposed on one end side (left and right direction X left side). The first cam 78 has a substantially fan-like plate shape arranged along the YZ plane, and the first drive shaft 77 is fixedly penetrated in the vicinity of the apex angle of the substantially sector shape. Accordingly, the first cam 78 rotates in an eccentric state by the rotational drive of the first drive shaft 77, and the cam follower 74 that contacts the outer peripheral surface of the first cam 78 rolls according to the outer peripheral surface shape of the first cam 78. Will do.

  In this way, the upper end side of the first swing arm 73 is urged in the advancing direction by the coil spring 75, and the lower end side of the first swing arm 73 rolls according to the first cam 78. The moving arm 73 swings in the left-right direction Y along the YZ plane around the first support shaft 73a.

  A bar member 79 extending in the advancing direction (front-rear direction Y front side) is rotatably attached to the upper end side of the first swing arm 73. On the left side, a work support portion 72 supported by a guide member (not shown) fixed to the apparatus main body 10 so as to be able to advance and retreat in the front-rear direction Y is provided.

  The work support portion 72 extends along the front-rear direction Y, and the tip end portion thereof is formed one step higher than the other portions, and is disposed so that the plate surface faces the up-down direction. The work support portion 72 is connected to the bar member 79 via a coil spring 75a that can be expanded and contracted in the front-rear direction Y, whereby the bar member is moved along with the swing of the first swing arm 73. When 79 moves in the front-rear direction Y, the workpiece support 72 also moves in the front-rear direction Y via the coil spring 75a.

  A stopper portion (not shown) is provided on the front side of the work support portion 72 to restrict the movement of the work support portion 72 to the front side beyond a predetermined position. As a result, when the bar member 79 advances, the workpiece support 72 moves forward with the bar member 79 up to a predetermined position, but the movement is stopped by the stopper at the predetermined position, and only the bar member 79 thereafter. Will advance.

  Further, an L-shaped sheet support portion 71 along the YZ plane is provided on the left side in the left-right direction X of the bar member 79 and the work support portion 72. The sheet support portion 71 has one side on the L-shape extending in the advance direction and the other side extending downward. And the lower end part in the other side is rotatably connected with the front-end | tip of the bar member 79 via the rotating shaft 71a along the left-right direction X, and the L-shaped corner | angular part followed the left-right direction X. It is connected to the work support 72 via a rotating shaft 72a so as to be rotatable.

  Since the sheet support part 71 is connected to the bar member 79 and the work support part 72 as described above, when the bar member 79 advances, the sheet support part 71 also advances in the same manner as the work support part 72. Then, when the advancement of the work support part 72 is stopped by the stopper part and only the bar member 79 is advanced, the sheet support part 71 rotates around the rotation shaft 72a. That is, the sheet support portion 71 is rotated around the rotation shaft 72a by being pushed by the bar member 79 in the advance direction through the rotation shaft 71a in a state where the position of the rotation shaft 72a that is the connection portion with the work support portion 72 is stopped. It rotates by receiving the torque. As a result, a portion forming one side of the L-shape of the sheet support portion 71 (hereinafter referred to as a tip portion of the sheet support portion 71) rotates upward.

  In the support mechanism 70 having such a configuration, the seat support portion 71 and the work support portion 72 are moved back and forth in the front-rear direction Y by the swing of the first swing arm 73. And in the state which these sheet | seat support parts 71 and the workpiece | work support part 72 advanced, the positional relationship with the synthetic resin inner pipe | tube W mounted on the table 11 becomes as shown in FIG.

That is, the sheet support portion 71 is positioned on the outer peripheral side of the receiving portion W2 of the synthetic resin inner tube W, and the sheet support portion is provided when the sheet material S is present between the sheet support portion 71 and the receiving portion W2. As the leading end of 71 rotates upward, the sheet support 71 sandwiches the sheet material S with the receiving port W2. As a result, the sheet material S can be supported on the outer peripheral surface of the receiving port W2.
The workpiece support 72 is located on the inner peripheral side of the receiving port W2 of the synthetic resin inner pipe W, and the lower surface of the workpiece supporting unit 72 comes into contact with the inner peripheral surface of the receiving port W2 from above. As a result, the heating and pressing mechanism 80 described later can support the receiving portion W2 against the pressing force when the receiving portion W2 is pressed upward from below.

  The heating and pressing mechanism 80 is a member for thermally welding the sheet material S to the outer peripheral surface of the receiving portion W2 of the synthetic resin inner tube W at the same time as shown in FIGS. 1 and 2. As shown, it is disposed below the work support 72 so as to be movable up and down.

As shown in detail in FIGS. 7 and 8, the heating and pressing mechanism 80 has a heating and pressing mechanism main body 81 having a substantially cubic shape. The heating and pressing mechanism main body 81 incorporates a heater so that the heating and pressing surface 82 which is the upper surface of the heating and pressing mechanism main body 81 is heated to a high temperature. Further, a cutter 83 having a blade extending along the front-rear direction Y is fixed to one side of the heating and pressing mechanism main body 81, that is, the side surface on the left side in the left-right direction X.
In addition, the heating temperature of the heating pressing surface 82 by the heater is set in a range of 270 ° C. to 300 ° C., for example, and is a temperature at which the sheet material S and the receiving portion W2 can be melted.

Examples of the shape of the heating and pressing surface 82 include various shapes as shown in FIGS.
That is, as shown in FIG. 9A, the heat pressing surface 82 may be provided with a concavo-convex shape by arranging a plurality of convex portions protruding upward and having a flat tip.
Moreover, as shown in FIG.9 (b), the heating press surface 82 may comprise the cylindrical surface shape which extended the circular arc shape along the front-back direction Y. As shown in FIG.
Furthermore, as shown in FIG. 9C, a sword mountain shape may be imparted to the heat pressing surface 82 by arranging a plurality of convex portions protruding upward and having a sharp tip.

  In the present embodiment, the surface of the heating and pressing surface 82 is coated with a fluorine resin.

  The heating and pressing mechanism main body 81 presses and heats the overlapping portion Sa of the sheet material S formed along the outer peripheral surface of the receiving portion W2 with the heating and pressing surface 82 in the upward direction. As a result, the polymerized portion Sa is thermally welded, and the polymerized portion Sa and the outer peripheral surface of the receiving port W2 are heat-welded. The sheet material S is cut by the cutter 83 when the pressing by the heating and pressing mechanism 80 is strengthened.

Next, a mechanism for moving the heating and pressing mechanism main body 81 up and down in the heating and pressing mechanism 80 will be described.
The heating and pressing mechanism 80 is provided with a second swing arm 84 arranged to extend in a substantially horizontal direction. One end side of the second swing arm 84 is fixed to the apparatus main body 10 and is rotatably supported by a second support shaft 84a along the front-rear direction, whereby the second swing arm 84 is moved in the left-right direction. It can be rotated along a plane including X and the vertical direction Z, that is, the XZ plane.

  A cam follower 85 is provided at a position slightly closer to the second support shaft 84a than the central portion in the extending direction of the second swing arm 84 so as to project in a cylindrical shape in front of the front-rear direction Y. . The outer peripheral surface of the cam follower 85 is in contact with the outer peripheral surface of the second cam 87 fixed to the second drive shaft 86 extending along the front-rear direction X.

  The second cam 87 has a substantially fan-like plate shape arranged along the XZ plane, and the second drive shaft 86 is fixedly penetrated in the vicinity of the apex angle of the substantially sector shape. Accordingly, as the second drive shaft 86 is driven to rotate, the second cam 87 rotates in an eccentric state, and the cam follower that comes into contact with the outer peripheral surface of the second cam 87 from above is shaped like the outer peripheral surface of the second cam 87. Will roll according to.

  In this way, the cam follower 85 of the second swing arm 84 rolls according to the second cam 87, so that the tip end side of the second swing arm 84 is along the XZ plane around the second support shaft 84a. Swings vertically.

  A standing bar 88 extending upward is rotatably attached to the tip of the second swing arm 84 that can swing in the vertical direction. The standing bar 88 is configured to maintain the arrangement state along the vertical direction Z, and can be moved up and down by swinging the second swing arm 84. A spring mounting plate 89 projects from the surface of the standing bar 88 facing the right and left direction X, and a slider 90 having a heating and pressing mechanism main body 81 stands above the spring mounting plate 89. It is provided so as to be slidable in the vertical direction Z with respect to the installation bar 88. A coil spring 91 extending along the vertical direction Z is provided between the lower surface of the slider 90 and the spring mounting plate 89. That is, the slider 90 is supported by the standing bar 88 via the coil spring 91. It is said that it was in the state.

As shown in FIG. 8, the heating and pressing mechanism main body 81 and the slider 90 are rotated around the rotation shafts 81a and 81b via a rotation shaft 81a along the left-right direction X and a rotation shaft 81b along the front-rear direction Y. It is connected to the pivotable. Thereby, the heating press surface 82 can face now in arbitrary directions.
The heating and pressing mechanism main body 81 only needs to be rotatable about at least one axis along a plane including at least the left-right direction X and the front-rear direction Y. In addition, for example, the heating and pressing mechanism main body 81 is connected via a knuckle joint. It is sufficient that the heating pressing surface 82 is configured to be able to face in an arbitrary direction.

  Then, the heating and pressing mechanism main body 81 elastically presses the outer peripheral surface of the overlapping portion Sa and the receiving portion W2 through the coil spring 91 at the top dead center. Thereby, the pressing force according to the spring constant of the coil spring 91 is applied to the overlapping portion Sa and the receiving port W2. The spring constant of the coil spring 91 is preferably set in the range of 50 to 300 N / mm.

  Here, the first drive shaft 77 and the second drive shaft 86 are connected by bevel gears 77 a and 86 a, and the driving force of the first drive shaft 77 is transmitted to the second drive shaft 86 through these bevel gears 77 a and 86 a. Thus, the second drive shaft 86 is configured to be driven. Accordingly, the support mechanism 70 and the heating and pressing mechanism 80 are arranged so that the heating and pressing mechanism main body 81 moves upward after a predetermined time has elapsed since the sheet supporting portion 71 and the workpiece supporting portion 72 of the supporting mechanism 70 have advanced. It is configured to work together.

In the present embodiment, a sensor cam 92 is provided on the second drive shaft 86 in addition to the second cam 87. The sensor cam 92 has the same configuration as the second cam 87 and is attached to the second drive shaft 86 in an eccentric state.
A proximity sensor 93 is provided in the vicinity of the sensor cam 92. The proximity sensor 93 is configured to detect the sensor cam 92 when the heating and pressing mechanism main body 81 reaches the top dead center by driving the second drive shaft 86.
A detection signal of the sensor cam 92 by the sensor cam 92 is sent to a control unit (not shown). In this control unit, the drive motor 76 is stopped for a predetermined time based on the detection signal.

  Thereby, the time for the heating and pressing mechanism main body 81 to reach the top dead center and the heating and pressing surface 82 press the overlapping portion Sa and the receiving port W2 can be arbitrarily determined. That is, in the present embodiment, the sensor cam 92, the proximity sensor 93, and a control unit (not shown) constitute a timer mechanism that controls the pressing time by the heating pressing surface 82. In the present embodiment, it is preferable that the heating pressing surface 82 is configured to press the overlapping portion Sa and the receiving portion W2 by a timer mechanism for a time of 0.1 to 5 seconds, for example.

Next, with reference to FIGS. 10 to 19, work steps of the sheet material winding method by the sheet material winding apparatus 1 according to the embodiment will be sequentially described.
First, as shown in FIG. 10, the sheet material S is sandwiched between the feed roller 30 (the driving roller 30a and the driven roller 30b) and the tightening roller 40 (the driving roller 40a and the driven roller 40b) from the roll R. (However, it is not chucked), and it is in a state of passing between the fixed-side clamping member 51 and the movable-side clamping member 52 that are separated from each other in the clamping unit 50, and the leading edge of such a sheet material S is It is clamped by the reverse clamping unit 60 that is moving to the lower position.

  When the sheet material S is fed, the feed roller 30b moves downward in the vertical direction Z and chucks with the roller 30a. At the same time, the clamping roller 40b moves upward in the vertical direction Z and the chuck with the roller 40a is released. Become. From this state, the reversing and clamping unit 60 moves to a position slightly below the table 11 (hereinafter referred to as the upper position) while rotating substantially once, and as a result, as shown in FIG. It is formed.

Next, the feed roller 30 rotates forward, a predetermined amount of the sheet material S is fed from the guide surface 20a of the guide portion 20 along the guide surface 21a of the guide portion 21, and the loop is expanded, as shown in FIG. A large loop L2 is formed.
Thereby, the circulation process of the sheet material S by the circulation mechanism 2 including the feed roller 30, the guide parts 20 and 21, and the reverse clamping part 60 is completed.

After the large loop L2 is formed in this way, the bar member 79 advances to a position where the work support part 72 is stopped by the stopper part by the swing of the first swing arm 73. In this state, the front end portion of the sheet support portion 71 is not rotated upward, and the end portion of the sheet material S is positioned above the sheet support portion 71 (see FIG. 13).
Then, the synthetic resin inner pipe W is placed on the table 11 so that the work support 72 is inserted into the inner periphery of the receiving port W2. Thereby, the sheet material S enters a state between the sheet support portion 71 and the outer peripheral surface of the receiving portion W2. Further, the lower surface of the work support portion 72 comes into contact with the inner peripheral surface of the receiving port portion W2 from above.

  Next, when the bar member 79 further advances due to the swing of the first swing arm 73, the leading end portion of the sheet support portion 71 is rotated upward, and the sheet support portion 71 and the outer peripheral surface of the receiving port portion W2 are in contact with each other. The end of the sheet material S is sandwiched between them (see FIG. 14). That is, the end of the sheet material S is supported on the outer peripheral surface of the receiving port W2 from below by the operation of the sheet support portion 71.

Immediately thereafter, the tightening roller 40b moves downward in the vertical direction Z to chuck with the roller 40a, and simultaneously, the feed roller 30b moves upward in the vertical direction Z to release the chuck with the roller 30a, as shown in FIG. The reverse clamping unit 60 moves backward and the clamping roller 40 clamps the sheet material S and rotates forward. As a result, the loop is narrowed down, and the necessary amount of tightening is performed in accordance with the outer diameter of the receptacle W2. Thereby, as shown in detail in FIG. 16, the sheet material S is wound so as to be in close contact with the entire outer peripheral surface of the receiving port portion W2. At this time, the winding start portion and the winding end portion of the sheet material S overlap with each other, and a superposed portion Sa is formed. In addition, the superposition | polymerization part Sa said here is not only the state in which the winding start part and the winding end part of the sheet | seat material S mutually contacted and overlapped, but these winding start part, winding end part, and receptacle part W2. It also includes a state where they are spaced apart from each other in the radial direction.
Thus, the tightening process by the tightening mechanism 3 including the tightening roller 40 and the sheet support portion 71 is completed.

  When the above tightening operation is completed, as shown in FIG. 17, the moving side holding member 52 is pushed up, and the sheet material S is held between the moving side holding member 52 and the fixed side holding member 51, The heating and pressing mechanism 80 is activated, and the heating and pressing mechanism main body 81 moves upward. At this time, as shown in FIG. 18, the heating pressing surface 82 presses the overlapping portion Sa formed by overlapping the winding start portion and the winding end portion of the sheet material S from below to above for a predetermined time. Thereby, the superposed portion Sa is thermally welded by the heating of the heater, and the heat of the heater is transmitted to the receiving port W2 through the superposed portion Sa, so that the superposed portion Sa and the outer peripheral surface of the receiving port W2 are integrated. Heat welded. And the cutter 83 cut | disconnects the superposition | polymerization part Sa by the further press of the heating press surface 82. FIG.

  Next, the heating and pressing mechanism 80 is lowered to leave the bonded portion between the overlapped portion Sa and the receiving portion W2, and the moving side holding member 52 is further away from the fixed side holding member 51. 10 is in a state of preparation for winding operation, that is, a state shown in FIG.

  As described above, the sheet material winding apparatus 1 and the sheet material winding method according to the present embodiment allow the sheet material S to be spaced from the outer peripheral surface of the receiving portion W2 of the synthetic resin inner pipe W as shown in FIG. Furthermore, the sheet material S can be reliably fixed to the receiving port W2 by heat-welding and integrating the polymerization portion Sa and the outer peripheral surface of the synthetic resin inner tube W.

  Here, when the sheet material S is provided on the outer peripheral surface of the synthetic resin inner tube W, the sheet material S needs to be closely adhered to the outer peripheral surface with no gap and fixed to the outer peripheral surface to the extent that the sheet material S does not peel off. There is.

In this respect, according to the sheet material winding device 1 of the present embodiment described above, the sheet material S can be reliably wound around the outer peripheral surface of the receiving port W2 by the rotation mechanism 2 and the tightening mechanism 3 at high speed.
Further, when the heating and pressing surface 82 of the heating and pressing mechanism 80 presses the overlapping portion Sa of the sheet material S, there is no member interposed between the overlapping portion Sa and the receiving portion W2, so that the heating and pressing surface 82 The heat is also transmitted to the receiving portion W2, and the overlapping portion Sa and the receiving portion W2 can be heat-welded and integrated. As a result, the sheet material S can be securely fixed to the outer peripheral surface of the receiving port W2.

Here, as the sheet material S, for example, a thin resin film used for laminating a thin resin film used in a conventional automatic bundling apparatus is formed on paper, instead of the resin fiber nonwoven fabric or the foamed resin sheet used in this embodiment. When it is adopted, welding is likely to be insufficient because the resin content is small. In addition, since the resin film and paper are dense materials, the function as a cushioning material cannot be properly exhibited.
On the other hand, in the present embodiment, as the sheet material S, a polyester nonwoven fabric, a resin fiber nonwoven fabric made of nylon, polypropylene, or polyethylene, or a foamed resin sheet made of urethane, polypropylene, or polystyrene is adopted. Since these thicknesses are, for example, about 0.44 mm, the function of the sheet material S as a buffer material can be appropriately exhibited.

  Further, since the work support portion 72 is in contact with the inner peripheral surface of the receiving portion W2 from above, even if the pressing force of the heating pressing surface 82 of the heating press mechanism 80 reaches the receiving portion W2, the receiving port The portion W2 can be supported and fixed. Therefore, since the pressing force of the heating and pressing mechanism 80 can be received with certainty, it is possible to more reliably perform the thermal welding between the receiving port W2 and the overlapped portion Sa of the sheet material S. In particular, in the present embodiment, the sheet material S having a thickness of, for example, about 0.44 mm is used. However, even if such a relatively thick sheet material S is adopted by adopting the heating and pressing mechanism 80, Heat welding can be ensured.

Furthermore, in this embodiment, since the heating pressing surface 82 of the heating pressing mechanism 80 is provided with any one of an uneven shape, a sword mountain shape, and a cylindrical surface shape, the heating pressing surface 82, the overlapping portion Sa, and the receiving portion W2 are provided. The contact area can be reduced. Thereby, since the surface pressure by the press of the heating pressing surface 82 increases, the thermal welding between the receiving portion W2 and the overlapped portion Sa of the sheet material S can be more reliably performed. Further, by leaving an unmelted portion in the sheet material S, it is possible to prevent the sheet material S from being broken.
In particular, when the heat pressing surface 82 is provided with an uneven shape or a sword mountain shape, the sheet material S can be bitten into the receiving portion W2 while being melted. Therefore, it is possible to more firmly heat-bond the overlapping portion Sa and the receiving portion W2.

  Furthermore, since the surface of the heating and pressing surface 82 of the heating and pressing mechanism 80 is coated with a fluororesin, the heating and pressing surface 82 can be easily attached to the overlapping portion Sa after the polymerization portion Sa and the receiving portion W2 are thermally welded. Can be peeled off.

  Further, since the heating and pressing mechanism main body 81 is connected to the slider 90 so as to be rotatable around the rotation shafts 81a and 81b, the heating and pressing mechanism main body 81 swings along the XZ plane and the YX plane. It becomes possible to move. That is, since the swinging mechanism capable of directing the heating pressing surface 82 in any direction is provided, the synthetic resin inner tube W is inclined when the synthetic resin inner tube W is placed. Even in this case, when the heat pressing surface 82 contacts the receiving port portion W2 of the synthetic resin inner pipe W, the heating and pressing mechanism main body 81 swings so as to follow the shape of the receiving port portion W2. As a result, it is possible to prevent the heating pressing surface 82 from hitting the receptacle W2, and the pressing force applied by the heating pressing surface 82 can be evenly applied.

  Furthermore, in the present embodiment, a timer mechanism is provided that arbitrarily determines the pressing time of the overlapping portion Sa and the receiving portion W2 by the heating pressing mechanism 80 by the sensor cam 92, the proximity sensor 93, and a control unit (not shown). A pressing time required for heat welding can be determined, and a stable heat-melted state can be created. Therefore, variation in fixing of the sheet material S in each synthetic resin inner pipe W can be prevented.

  And by manufacturing the fireproof two-layer pipe joint using the synthetic resin inner pipe W around which the sheet material S is wound and fixed by the sheet material winding device 1 and the sheet material winding method, the cement mortar layer Generation of cracks can be prevented.

As mentioned above, although embodiment of this invention was described in detail, unless it deviates from the technical idea of this invention, it is not limited to these, A some design change etc. are possible.
For example, in the present embodiment, a synthetic resin inner tube W as a workpiece of the sheet material winding device 1 is used, and a sheet material S made of a polyester nonwoven fabric or the like is wound around the receiving port W2 of the synthetic resin inner tube W. Although the case where it rotates is described, it is not limited to this, and any other article can be used as a work as long as it has a cylindrical portion, and a sheet material S made of another material is used. Even if it is possible to apply.

DESCRIPTION OF SYMBOLS 1 Sheet | seat winding apparatus 2 Circulation mechanism 3 Clamping mechanism 10 Apparatus main body 20 Guide part 21 Guide part 30 Feed roller 40 Clamping roller 50 Clamping part 60 Reverse clamping part 70 Support mechanism 71 Sheet support part 72 Work support part 80 Heating pressure Mechanism 81 Heating pressure mechanism main body 82 Heating pressure surface 83 Cutter 92 Sensor cam 93 Proximity sensor R Roll S Sheet material W Synthetic resin inner pipe W2 Receiving part

Claims (12)

A sheet material winding device for winding a sheet material around the outer peripheral surface of the cylindrical portion of the workpiece,
A circling mechanism for circling the sheet material, the end of which is drawn out from a roll, to the outer peripheral side of the cylindrical portion of the workpiece;
A tightening mechanism that superimposes the winding start portion and the winding end portion of the sheet material while tightening the sheet material that is wound around the outer peripheral side of the cylindrical portion to the outer peripheral surface of the cylindrical portion;
A sheet material winding apparatus comprising: a heating and pressing mechanism that heats the overlapped portion of the sheet material while pressing the overlapped portion toward the tubular portion, and thermally welds the overlapped portion and the tubular portion. .   The sheet material winding device according to claim 1, further comprising a work support portion that supports the work against the pressure of the heating and pressing mechanism. The sheet material is
Polyester nonwoven fabric,
Resin fiber nonwoven fabric made of nylon or polypropylene or polyethylene,
The sheet material winding apparatus according to claim 1 or 2, wherein the sheet material winding apparatus is one of a foamed resin sheet made of urethane, polypropylene, or polystyrene. The workpiece is a synthetic resin inner pipe in a fireproof two-layer pipe joint,
The sheet material winding device according to any one of claims 1 to 3, wherein the cylindrical portion is a receiving portion of the synthetic resin inner pipe.   5. The sheet material winding device according to claim 1, wherein the heating and pressing mechanism is provided with any one of an uneven shape, a sword mountain shape, and a cylindrical surface shape.   The sheet material winding device according to any one of claims 1 to 5, wherein the heating and pressing mechanism is coated with a fluorine resin.   The sheet material winding device according to any one of claims 1 to 6, wherein the heating and pressing mechanism is swingable so as to follow an outer peripheral surface of the cylindrical portion.   The sheet material winding device according to any one of claims 1 to 7, further comprising a timer mechanism that controls a time for the heating and pressing mechanism to press the overlapping portion. A first step in which the sheet material with the end portion drawn out from the roll body is rotated around the outer peripheral side of the cylindrical portion of the workpiece;
A second step in which the wound sheet material is fastened to the outer peripheral surface of the cylindrical portion, and a winding start portion and a winding end portion of the sheet material are polymerized,
A sheet material winding method comprising: a third step of heating the superposed portion of the sheet material while pressing the superposed portion against the cylindrical portion, and thermally welding the superposed portion and the cylindrical portion. The sheet material is
Polyester nonwoven fabric,
Resin fiber nonwoven fabric made of nylon or polypropylene or polyethylene,
The sheet material winding method according to claim 9, wherein the sheet material is a foamed resin sheet made of urethane, polypropylene, or polystyrene. The workpiece is a synthetic resin inner pipe in a fireproof two-layer pipe joint,
The sheet material winding method according to claim 9 or 10, wherein the cylindrical portion is a receiving portion of the synthetic resin inner tube.   The sheet material winding method according to claim 11, further comprising a step of winding the sheet material around a receiving portion of a synthetic resin inner pipe in the fire-resistant double-layer pipe joint. Production method.

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