JP5250295B2 - Method and apparatus for inserting small diameter cylindrical rubber product - Google Patents

Description

  The present invention relates to a method for inserting a small diameter cylindrical rubber product and an apparatus therefor, and in the manufacture of a cylindrical product such as a tube, a hose, a rubber such as a belt or a roller, or a plastic (hereinafter referred to as “rubber product”). used.

  Usually, in the manufacture of a cylindrical rubber product as described above, there may be a step of polishing the outer peripheral surface of the molded cylindrical rubber product to finish it into a smooth surface. For example, it is performed for smoothing the outer peripheral surface of a cylindrical belt such as a charging belt for a copying machine by polishing or adjusting the thickness thereof.

  Specifically, in the production of various rubber rollers used in copying machines and the like, a flow as shown in FIG. 5 (A) is known, and a molded body into which a shaft is inserted is shown in FIG. 5 (B). The method of grind | polishing in such a form can be mentioned (for example, refer patent document 1). As shown in FIG. 5A, first, a base rubber, a crosslinking agent, a filler, a foaming agent and the like are kneaded (STP1). A rubber composition is obtained by kneading. Next, this rubber composition is put into an extruder and extruded into a cylindrical shape (STP2). Next, the cylindrical rubber composition is vulcanized (STP3). Thus, a cylindrical shaped body is obtained. Next, a shaft is inserted into this molded body (STP4). Next, the surface of the molded body is polished (STP5). Thus, the rubber roller is completed. After polishing, the rubber roller is subjected to dimensional inspection (STP6).

  Further, as shown in FIG. 5B, the polishing surface 55 of the grindstone 57 is in contact with the outer peripheral surface 52 of the molded body 51. At the time of polishing, the grindstone 57 is rotated by rotating the core rod 59, and the molded body 51 is rotated by rotating the shaft 53. By the friction between the molded body 51 and the grindstone 57, the outer peripheral surface 52 of the molded body 51 is polished. Although the overall length L of the grindstone 57 is smaller than the overall length of the compact 51, the grindstone 57 rotates while moving in the axial direction (left-right direction in the figure), so the entire outer peripheral surface 52 of the compact 51 is polished. The buff powder generated by the polishing is sucked by a dust collector (not shown). By polishing, the surface roughness of the rubber roller is adjusted. By polishing, the outer diameter of the rubber roller is adjusted.

  At this time, generally, a method is adopted in which the cylindrical rubber product is inserted into the outer periphery of a tubular body such as a metal tube having an outer diameter slightly larger than the inner diameter from one end opening side in the cylinder axis direction. The operator puts the belt in a metal tube about 10 mm in the standing position, picks the end, creates a gap between the belt and the metal tube, and inserts the belt by hand while blowing air with an air gun or the like Was. In recent years, various methods have been used or proposed from the viewpoint of labor saving and improvement of work efficiency.

  Specifically, as shown in FIG. 6, a step (A) of gripping both ends of the rubber tube 61, a step (B) of inserting a nozzle 63 from one end of the through hole 62 of the rubber tube 61, and the rubber A step (C) of aligning the nozzle shaft 63 and the core shaft 64 disposed at the other end of the through-hole 62 of the tube 61; and while discharging the positive pressure air from the nozzle 63, retreating the nozzle 63 There has been proposed a rubber roll manufacturing method including a step (D) of inserting the core shaft 64 into the through hole 62 of the rubber tube 61 (see, for example, Patent Document 2).

  Further, as shown in FIG. 7, the lower end of the cylindrical belt 71 is mounted on a movable plate member 75 configured to be able to be driven up and down with respect to a tube set base 73 that fixes and supports the tube 72 at its lower end in the axial direction. A plurality of diameter-expansion units 77 each including a latching claw 78 that can latch the opening edge 71e and an air cylinder 79 that drives the latching claw 78 to move radially outward of the cylindrical belt 71 are mounted. On the other hand, an insertion device for a cylindrical belt has been proposed in which an air blowing hole 76 capable of blowing air outward is provided near one end in the axial direction of the tubular body 72 (see, for example, Patent Document 3).

JP 2004-9157 A JP 2004-308781 A JP 2003-191163 A

  However, in the method according to the known technique as described above, when applied to various uses, it may be difficult to sufficiently respond in terms of equipment or work efficiency.

  Specifically, gripping and pulling only the rubber part is difficult manually, and because it is unreasonably pulled in a non-discriminatory direction, local distortion occurs, which adversely affects the performance of the final product. There was a problem that could be. In addition, since the operation of bringing the air gun closer to the gap in order to blow in air was manual, the air gun may be accidentally brought into contact with the tubular body and the tubular body may be damaged.

  Also, if the inner diameter of the rubber product is smaller than the outer diameter of the tube, the entire end of the rubber product should be in contact with the outer periphery of the tube evenly due to the rubber properties such as adhesiveness and flexibility. In some cases, it was difficult to insert as it is.

  In particular, when the rubber product itself has a small diameter, it is difficult to insert an air gun, and it is difficult to blow air while the rubber product is gripped, and there are difficulties in inserting the tip due to dimensional restrictions. Further, it becomes larger and an excessive load is applied. As a result, it takes a lot of time and labor to insert one.

  The present invention has been made in view of the above circumstances, and the problem is that, when a cylindrical rubber product is inserted into a tubular body, local distortion deformation or the like occurs without providing a special member or a special mechanism. It is an object of the present invention to provide a method and an apparatus for inserting a small diameter cylindrical rubber product that can be operated smoothly and reliably.

  In order to solve the above-mentioned problems, the present inventors have intensively researched and found that the above object can be achieved by the following method and apparatus for inserting a small-diameter cylindrical rubber product, thereby completing the present invention. It reached.

That is, the present invention is a method for inserting a small-diameter cylindrical rubber product into a tubular body,
The tubular body has a tubular portion having an outer diameter larger than the inner diameter of the tubular rubber product before insertion, and a central portion for inserting and holding the tubular rubber product, and is disposed at one end of the tubular body. A first end portion having a cylindrical portion having a diameter equal to or smaller than the inner diameter of the rubber product, a connecting portion connecting the first end portion and the central portion, and on the side opposite to the first end portion with respect to the central portion A second end portion having a cylindrical portion that is disposed and into which the cylindrical rubber product is not inserted, an inlet for introducing a compressed fluid into the second end portion, a connection portion side of the central portion, and a central portion of the connection portion A member having a plurality of outlets on the side, and a flow path connected to the plurality of outlets from the inlet to the inside of the tubular body,
In a state where the tubular body is fixed, a compressed fluid is introduced from the inlet, and a cylindrical rubber product is inserted from the first end.

Further, the present invention is an apparatus for inserting a small-diameter cylindrical rubber product into a tubular body,
A central portion having a cylindrical portion having an outer diameter larger than the inner diameter of the cylindrical rubber product before insertion and inserting / holding the cylindrical rubber product; an inner diameter of the cylindrical rubber product disposed at one end of the tubular body; A first end portion having an equal or small-diameter cylindrical portion, a connecting portion connecting the first end portion and the central portion, and a cylindrical shape disposed on the opposite side to the first end portion with respect to the central portion A second end portion having a cylindrical portion into which a rubber product is not inserted, and an inlet for introducing a compressed fluid into the second end portion, and a plurality of blowers on the connecting portion side of the central portion and the central portion side of the connecting portion. A tubular body having an outlet and a flow path connected to the plurality of outlets from the inlet into the tubular body;
A fixing member for fixing the tubular body;
In a state where the tubular body is fixed, connecting means for connecting the inlet and the inlet of the compressed fluid;
A feeding means for supplying a compressed fluid to the flow path in the tubular body through the inlet;
It is characterized by having.

  In order to insert a rubber product into the tube, it is preferable that at least the outer diameter of the tip of the tube is smaller than the inner diameter of the rubber product. Moreover, it is preferable that the periphery of the end portion of the rubber product expands when the compressed fluid is blown evenly and around the entire peripheral surface when inserted into the tube, and an equal gap is formed between the tube and the tube. As a result of verifying various compressed fluid blowing methods (hereinafter, the flow of compressed fluid is referred to as “air blow”), the present inventor found that the position of the air blow outlet is (a) the insertion side end of the central portion of the tube body. In this case, it is preferable to smoothly insert the rubber product at the center portion, and (b) from the end portion of the pipe body to the center portion (corresponding to “connecting portion” in the present invention). It has been found that it is preferable to smoothly insert the rubber product into the central portion on the center side, and in particular, it is preferable to provide a plurality of these, that is, when inserting the rubber product into the tube. The air blow is performed not only at the end of the tube at the connecting portion side but also immediately before the end of the connecting portion at the center, thereby reliably utilizing the expansion of the rubber and providing an even gap between the tube and the tube. Can be provided.

  Further, since the outer diameter of the central portion of the tubular body is larger than the outer diameter of the first end portion, the connecting portion has a predetermined inclination angle with respect to the central axis of the tubular body. That is, the air outlet provided at the insertion side end of the connection portion has a predetermined inclination angle with respect to the inner surface of the rubber product to be inserted, and the air blow applies pressure at an angle suitable for insertion with respect to the rubber. It became possible to insert more smoothly by giving.

  Furthermore, the first end portion and the second end portion provided in the tube body can also serve as fixtures for fixing the tube body into which the rubber product is inserted in the next polishing process or inspection process. is there. Moreover, the blower outlet provided in the center part of a pipe body can be utilized also when performing a demolding process of a rubber product from a pipe body.

  Therefore, it is possible to insert a small-diameter cylindrical rubber product that can be operated smoothly and reliably without using a special member or a special mechanism such as a cover material or a cap body, and without causing local distortion and deformation. And an apparatus thereof can be provided.

  Here, the “small-diameter cylindrical rubber product” refers to a cylindrical body having an inner diameter that makes it difficult to mechanically hold or expand the opening, such as a “holding claw” illustrated in FIG. Specifically, for example, a cylindrical body having an inner diameter of 50 mm or less is applicable.

  The present invention is an apparatus for inserting the small-diameter cylindrical rubber product into a pipe body, wherein the outlet is a position where the outer periphery of the central portion and the outer periphery of the connection portion are substantially equally divided, and are adjacent to each other. It is arranged in that.

  As described above, it is preferable that there are a plurality of positions of the outlets of various compressed fluids on the side of the connection part of (a) the central part and the part of the central part of (b) the connection part. As a result of further verification, the present inventor, as a result of further verification, (c) air blown in the opposite direction by bringing the air outlet on the central portion side of the connecting portion close to the air outlet on the connecting portion side of the central portion. The rubber product expands to form a uniform gap with the tubular body, and (d) at least 2 from the position where the outer periphery of the tubular body is substantially equally divided. It has been found that it is necessary to cover the entire outer peripheral surface of the tube with two air blows. In other words, by disposing the air outlet in the central portion and the air outlet in the connecting portion in an overlapping position with respect to the central axis direction of the tubular body, the air blow is dispersed and the outer periphery of the tubular body is substantially reduced. By providing the outlets at the equally divided positions, the air blow can be made uniform, and the gap between the rubber product and the tubular body can be formed more evenly by equal pressure, and can be smoothly inserted.

  The present invention is an apparatus for inserting the small-diameter cylindrical rubber product into a tubular body, wherein a guide member is disposed at the second end, and the guide member can be engaged with or fixed to the fixing member. It is characterized by having.

  There are various methods for fixing the tubular body, but in the present invention, a fixing method that can be used appropriately in a subsequent polishing step, inspection step, or the like is preferable. In other words, it is desirable that the second end portion be a fixing member in the insertion step, and that chucking can be performed as a base point of the rotation operation and engagement in the rotation direction can be prevented in the subsequent step. Accordingly, by providing a guide member at the second end of the tube body and providing a fixing member with a portion where the guide member can be engaged or fixed, the fixing can be ensured with a simple configuration. It is possible to ensure the chucking even in the rotation operation of the body.

  As described above, according to the present invention, local deformation and deformation can be performed without providing a special member or a special mechanism by appropriately arranging the pipe body at the position of the air blow outlet with an optimal structure. It has become possible to provide a method and an apparatus for inserting a small diameter cylindrical rubber product that can be smoothly and reliably operated without being generated.

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

<Basic configuration of rubber product insertion device according to the present invention>
FIG. 1 illustrates a state immediately before inserting a rubber product 2 into a tube body 1 as an overall view of a rubber product insertion device according to the present invention. It has a guide 4 that regulates a guide member 3 disposed in the tube 1, has a fixing member 5 that fixes the tube 1, and an inlet 6 for supplying compressed fluid (air), and is moved by a cylinder 7. And connecting means 9 connected to the inlet 8 provided in the pipe body 1, and connecting means 9 connected to the connecting means 9 and supply means for supplying compressed air to the pipe body 1 through the inlet 6. Is done. At this time, the structure of the fixing member 5, the connecting means 9, and the feeding means can be simplified by inserting the tubular body 1 in an upright and fixed state.

  Here, as shown in FIG. 1, the rubber product 2 forms a cylindrical body having an inner diameter d of 50 mm or less, for example, about 20 to 30 mm, a thickness of about 0.5 to 5 mm, and a length of about 200 to 500 mm. . As the material, it is possible to use natural rubber or synthetic rubber having a predetermined elasticity, for example, diene rubber such as NBR (nitrile rubber), non-diene rubber such as EPDM (ethylene propylene rubber), silicon rubber or urethane rubber. it can.

  The material of the fixing member 5 is not particularly limited as long as it can reliably fix the tube body 1, but a resin such as MC nylon is preferably used from the viewpoint of protecting the holding portion of the tube body 1. In addition, the fixing member 5 preferably has a portion that can engage or fix the guide member 3 together with the guide 4 that regulates the guide member 3 of the tube body 1. By providing such a part, it is possible to ensure fixation with a simple configuration. It is also possible to prevent the occurrence of positional deviation in the rotation direction.

  The compressed fluid is not particularly limited as long as it is easily compressed and has a function of expanding a rubber product, and air that is usually easily available, particularly dry air, can be used. Although not shown in FIG. 1, as compressed air feeding means, it is preferable that air pressurized using a compressor is connected through a connecting valve 10 in a state where dust is removed and purified by a filter or the like.

  The connection between the introduction port 6 and the injection port 8 can be achieved, for example, by providing a sealing member made of resin around the introduction port 6 to improve adhesion, or by connecting the distal end of the connecting means 9 including the introduction port 6 with flexibility. A sealing method using a certain resin member can be employed. The position of the inlet 8 in the fixing member 5 is determined by the tube 1 guide member 3 being restricted by the guide 4, and the tip of the connecting means 9 including the inlet 6 is slid to that position by the cylinder 7. The connection and the seal can be reliably maintained, and high reproducibility can be ensured. The movement of the connecting means 9 is not limited to the cylinder 7, but various means such as a robot arm can be used.

  Moreover, in this structure, it is possible to provide a control part (not shown) and to connect with a compressor (not shown), the valve 10 and the cylinder 7. Thereby, the operation of the compressor, the opening and closing of the valve 10, the adjustment of the air pressure and flow rate, and the reciprocating movement / stop position of the cylinder 7 can be controlled manually or automatically.

  Next, the tube 1 will be described in detail. As illustrated in FIG. 2, the tube body 1 has a central portion 11, a first end portion 12, a connection portion 13, and a second end portion 14, and introduces a compressed fluid into the second end portion 14. A plurality of outlets 15n and 16n (hereinafter referred to as “15a, 15b, 15c for the individual outlets on the connecting portion side of the central portion 11) on the inlet 6 and the connecting portion side of the central portion 11 and the central portion side of the connecting portion 13, respectively. ,..., And is generically referred to as “15n”, and the individual outlets on the central side of the connecting portion 13 are referred to as “16a, 16b, 16c,. )) And a flow path 17 connected from the inlet 8 to the plurality of outlets 15n and 16n inside the tubular body.

  The material of the tube body 1 is not particularly limited, but it is made of metal such as stainless steel because of its robustness in the processing step described later, the fixing property in a state where the rubber product 2 is inserted, the ease of removal after processing such as polishing, and the like. Etc. are preferable.

  The central portion 11 has a cylindrical portion 11a having an outer diameter Da larger than the inner diameter d of the rubber product 2 shown in FIG. 1, and the rubber product 2 is inserted to form a state of covering the whole. Further, a plurality of air outlets 15n are provided at positions close to the connecting portion 13 of the central portion 11, and compressed air is blown out from the flow path 17 formed inside the tube body 1. By setting the outer diameter Da of the central portion 11 to, for example, about 30 to 50 mm, the inserted rubber product 2 can be reliably fixed. The length of the central portion 11 is the same as the length of the rubber product 2 (about 200 to 500 mm) or slightly longer.

  It is preferable to provide a plurality of air outlets 15n. That is, by performing air blow at the time of inserting the rubber product 2 into the tube 1 from the plurality of air outlets 15a, 15b, 15c,. By utilizing this, a uniform gap is provided between the tube body 1 and the rubber product 2 can be smoothly inserted into the central portion 11. Further, the air outlet 15n can form an equal gap between the two by performing air blowing even when the rubber product 2 is demolded from the tube body 1, and thus the rubber product 2 with a small diameter can be manufactured. It is also effective as a whole process.

  Moreover, it is preferable to provide the blower outlet 15n in the position which divides | segments the outer periphery of the center part 11 substantially equally. In other words, the entire outer peripheral surface of the tube 1 is covered by at least two air blows from a position where the outer periphery of the tube 1 is substantially equally divided, and the air blow is made uniform. The gaps can be formed more evenly and can be inserted smoothly.

  In order to insert the rubber product 2 into the tubular body 1, the first end portion 12 preferably has at least the outer diameter Db of the distal end portion of the tubular body 1 smaller than the inner diameter d of the rubber product 2 before insertion. It is disposed at one end of the tube body 1 and has a cylindrical portion 12a having an outer diameter Db that is equal to or smaller than the inner diameter d of the rubber product 2. That is, for example, in the case of the rubber product 2 having an inner diameter d of about 20 to 30 mm, the outer diameter Db is preferably set to about 20 to 30 mm. In addition, it is preferable to chamfer the front end of the first end portion 12 so as to facilitate insertion.

  The connecting portion 13 connects the first end portion 12 having a small diameter and the central portion 11 having a large diameter, and has a tapered shape, a convex curved surface shape, or a concave curved surface shape in order to facilitate the insertion of the rubber product into the central portion. It preferably has a shape. A plurality of outlets 16n are provided at positions close to the central portion 11 of the connecting portion 13, and compressed air is blown out from the flow path 17 formed inside the tubular body 1.

  Here, it is preferable to provide a plurality of air outlets 16n. That is, from the plurality of air outlets 15a, 15b, 15c,... At the time of inserting the rubber product into the tube, also at the center side end of the connection portion at the same time as the connection portion side end of the tube center. By performing the air blow, it is possible to reliably provide an even gap between the tubular body and the rubber body by utilizing the expansion of the rubber, and to smoothly insert the rubber product into the central portion. In particular, the air blow at the connecting portion hits the inner surface of the rubber product to be inserted from a direction having a predetermined inclination angle with respect to the central axis of the tube body 1, and the air blow is inserted into the rubber. By applying pressure at an appropriate angle, it is possible to insert more smoothly.

  Moreover, it is preferable that the blower outlet 16n is arrange | positioned in the position which divides | segments the outer periphery of a connection part substantially equally, Comprising: The blower outlet 15n is adjoined. In other words, the entire outer peripheral surface of the tube 1 is covered by at least two air blows from a position where the outer periphery of the tube 1 is substantially equally divided, and the air blow is made uniform. The gap can be formed uniformly. Furthermore, it becomes possible to form the air blow which blows off in a reciprocal direction by making the blower outlet 16n and the blower outlet 15n arrangement | positioning proximity | contact, and making it the position which overlaps with respect to the central-axis direction of the pipe body 1. The air blow of 15n and the outlet 16n is dispersed to make the air blow uniform, and the gap between the rubber product 2 and the tube 1 can be formed more evenly and can be smoothly inserted.

  The second end portion 14 is disposed on the opposite side to the first end portion 12 with respect to the central portion 11 and has a cylindrical portion 14a into which the rubber product 2 is not inserted. The cylindrical portion 14a is provided with a compressed air inlet 8 on the center side and a guide member 3 on the opposite side. In attaching the tubular body 1 to the fixing member 5, the attachment position is regulated by the guide member 3, and the cylindrical portion 14 a is fitted into the fixing member 5 and is securely fixed.

  After that, the tube body 1 in which the rubber product 2 is inserted is used for a polishing process or an inspection process after the insertion process in a state where the rubber body 2 is held. At this time, the 1st end part 12 and the 2nd end part 14 which were provided in the pipe body 1 can also play the role as a fixture for fixing the pipe body 1 in which the rubber product 2 was inserted. Further, in the subsequent process, chucking can be performed as a starting point of the rotation operation and the engagement in the rotation direction can be prevented, and the chucking can be ensured even in the rotation operation of the tube body.

<Insertion method according to the present invention>
Next, a method for inserting the rubber product 2 into the tubular body 1 using the insertion device having the above configuration will be described. The insertion method according to the present invention includes (1) a step of fixing the tubular body 1, (2) a step of connecting the inlet 6 to the inlet 8, (3) a step of supplying compressed air, and (4) a rubber product 2. And (5) a step of inserting the rubber product 2 into the central portion 11.

(1) Step of fixing tube body 1 As shown in FIG. 1, in the fixing member 5, the tube member 1 is inserted and fixed along the guide 4 along the guide member 3, as illustrated in FIG. At this time, as shown in FIG. 3 (A), the second end portion 14 of the tube body 1 is fitted to the fixing member 5, and the inlet 8 is fixed at a position facing the inlet 6 for supplying compressed air. The In this state, the rubber product 2 vulcanized in the vulcanization process is held by an air chuck (not shown) and transferred to the insertion process. The air chuck stops above the fixing member 5 and delivers the rubber product 2 to the fixing member 5. In FIG. 1, one insertion device corresponds to one rubber product 2, but it is also possible to configure a device in which a plurality of fixing members 5 are arranged and a plurality of rubber products are inserted at the same time. is there.

(2) Step of connecting the inlet 6 with the inlet 8 In the state shown in FIG. 3A, the cylinder 7 is operated to move the connecting means 9 in the direction of arrow J, as shown in FIG. As described above, the inlet 6 is in close contact so as to seal the periphery of the inlet 8, and the inlet 6 and the inlet 8 are connected. At this time, in order to secure the fixing position of the fixing means 5 and the connecting means 9, it is preferable to provide a stopper 9a on the connecting means 9 side.

(3) Step of Supplying Compressed Air As shown in FIG. 3B, in a state where the tube body 1 is fixed to the fixing member 5 and the inlet 6 and the inlet 8 are connected, a compressor (not shown) ) And the valve 10, and compressed air is supplied from the inlet 6.

(4) Step of grasping one end portion of the rubber product 2 and inserting it into the first end portion 12 of the tube 1 Next, grasping one end portion of the transferred rubber product 2, as shown in FIG. And inserted into the first end 12 of the tube 1. In this state, the compressed air supplied from the introduction port 6 still hardly hits the rubber product 2, but when further inserted to the position shown in FIG. 4 (B), the air outlet 16 n provided in the connecting portion 13 The air blow layer is formed between the tubular body 1 and the rubber product 2 by hitting the inner surface of the rubber product 2. This air blow layer travels around the entire circumference of the gap between the tube 1 and the rubber product 2 and generates a force for expanding the rubber product 2 in combination with the air blow pressure.

  In particular, since the outer peripheral surface of the connecting portion 13 has an inclination angle α with respect to the central axis X of the tube 1, when the outlet 16 n is processed perpendicularly to the outer peripheral surface, the air blow is a rubber product. Since the air is blown out at the vertical angle α with respect to the inner surface of 2, the force for expanding the rubber product 2 can be generated strongly.

(5) Step of inserting the rubber product 2 into the central portion 11 (5-1) When the rubber product 2 is further inserted into the tube body 1, as shown in FIG. The compressed air blown from the outlet 15n hits the inner surface of the rubber product 2 and forms an air blow layer between the tube 1 and the rubber product 2. This air blow layer travels around the entire circumference of the gap between the tube 1 and the rubber product 2 and generates a force for expanding the rubber product 2 in combination with the air blow pressure. At this time, since the air blow is blown vertically to the inner surface of the rubber product 2, it is possible to strongly generate a force for expanding the rubber product 2.

  At the same time, as shown in FIGS. 4A to 4E, the outlets 15n and 16n are positions where the outer peripheries of the central portion 11 and the connecting portion 13 are substantially equally divided, and the two are close to each other. In the case where the air blower is disposed in the vicinity of the boundary between the central portion 11 and the connecting portion 13, it is possible to form an air blow that blows in the opposite direction and to make the air blow uniform. The gaps of the body 1 can be formed more evenly and can be inserted smoothly.

  (5-2) FIG. 4 (D) shows a state in which the rubber product 2 is further inserted into the pipe body 1, and the rubber product 2 and the pipe are formed by air blow from the blowout port 15n and air blow from the blowout port 16n. It shows that the gaps of the body 1 are formed uniformly. Thereby, it becomes possible to insert smoothly.

  (5-3) FIG. 4E shows a state in which the rubber product 2 is completely inserted into the central portion 11, and the rubber product 2 covering the connection portion 13 is lost. Accordingly, the compressed air from the air outlet 16n is released without hitting the rubber product 2, and the air blow from the air outlet 15n has almost no reaction force due to the air blow from the air outlet 16n. As shown in FIG. 4 (E), the flow in the lower part of the figure as shown in FIG. Yes.

(6) Step of Stopping Supply of Compressed Air and Completing Insertion Operation of Rubber Product 2 Next, operation of the compressor (not shown) and valve 10 is stopped, and supply of compressed air from the inlet 6 is stopped. To do. At this time, as shown in FIG. 4F, the operation of inserting the rubber product 2 into the tube 1 is completely completed. At the same time, when the cylinder 7 is operated and the connecting means 9 is moved in the direction opposite to the arrow J shown in FIG. 3A, the close contact with the inlet 6 at the inlet 8 is released.

  As described above, the molded rubber product 2 can be smoothly inserted into the tube body 1, and the tube body 1 into which the rubber product 2 is inserted is released from the fixed state by the fixing means 5. It becomes possible. After that, the tube body 1 into which the rubber product 2 is inserted is subjected to a polishing process or an inspection process after the insertion process in a state where it is held. In addition, by applying this insertion method, it is possible to form a continuous automatic line that is combined with the previous and subsequent steps.

As a result of using the rubber product insertion device according to the present invention and the following pipe body and rubber product, a tubular body into which the rubber product is inserted is produced without causing local distortion or the like. I was able to.
(I) As a tubular body, a stainless steel tubular body having an outer diameter Da of the central portion of 40 mm and an outer diameter Db of the first end portion of 25 mm and a total length of 400 mm was used.
(Ii) As the rubber product, urethane rubber having an inner diameter d: 25 mm, a thickness: 1 mm, and a length: 400 mm was used.

<Another embodiment of the present invention>
In the said embodiment, the aspect which moves and inserts the rubber product 2 in the state which fixed the tubular body 1 to the fixing member 5 was demonstrated. However, the present invention is not limited to this, and it is also possible to fix the rubber product 2, move the entire compressed air supply means including the connecting means 9, and insert the rubber product 2 into the tube body 1. is there. At this time, when it is necessary to fix the end portion or the outer peripheral surface of the rubber product 2, it is preferable to use holding means that can be expanded or moved corresponding to the expansion of the rubber.

  The rubber product 2 referred to in the present invention is used for, for example, a rubber belt, but is not limited thereto, and refers to a cylindrical product such as rubber widely used for various applications.

  In the present embodiment, air is used as the compressed fluid, but a compressed fluid other than air may be used.

  In the above, the method and the insertion device for mainly inserting a molded rubber product into the tube have been described as an example. However, the present invention can also be applied to insertion devices for various other resin products. Specifically, the present invention can be applied even when the central portion is not a straight pipe having the same diameter, and a tubular body having a tapered shape as a whole connected to the first end portion-connecting portion-central portion is used. Thus, the feature of the present invention is highly advantageous in that it can be applied not only to the versatility of its function but also to a wide range of uses.

Explanatory drawing illustrating the entire rubber product insertion device according to the present invention Explanatory drawing which illustrates the pipe body used in the insertion device of rubber products concerning the present invention Explanatory drawing which illustrates the fixed state of the tubular body in the insertion device according to the present invention Explanatory drawing which illustrates the state which inserts the rubber product in a pipe body in the insertion apparatus which concerns on this invention Explanatory drawing showing an example of the process from the molding to the completion of conventional rubber products and the polishing process Explanatory drawing showing an example of the conventional insertion device Explanatory drawing showing the other example of the conventional insertion apparatus

Explanation of symbols

1 Tube 2 Tubular rubber product (Rubber product)
3 Guide member 4 Guide 5 Fixing member 6 Inlet 7 Cylinder 8 Inlet 9 Connecting means 10 Valve 11 Central portion 12 First end portion 13 Connection portion 14 Second end portions 15a, 15b, 15c,... 15n, 16a, 16b , 16c, .. 16n Air outlet 17 Flow path

Claims (4)

A method of inserting a small diameter cylindrical rubber product into a tube,
The tubular body has a tubular portion having an outer diameter larger than the inner diameter of the tubular rubber product before insertion, and a central portion for inserting and holding the tubular rubber product, and is disposed at one end of the tubular body. A first end portion having a cylindrical portion having a diameter equal to or smaller than the inner diameter of the rubber product, a connecting portion connecting the first end portion and the central portion, and on the side opposite to the first end portion with respect to the central portion A second end portion having a cylindrical portion that is disposed and into which the cylindrical rubber product is not inserted, an inlet for introducing a compressed fluid into the second end portion, a connection portion side of the central portion, and a central portion of the connection portion A member having a plurality of outlets on the side, and a flow path connected to the plurality of outlets from the inlet to the inside of the tubular body,
A method for inserting a small-diameter cylindrical rubber product, wherein a compressed fluid is introduced from the inlet while the tubular body is fixed, and a cylindrical rubber product is inserted from the first end. A device for inserting a small diameter cylindrical rubber product into a tube,
A central portion having a cylindrical portion having an outer diameter larger than the inner diameter of the cylindrical rubber product before insertion and inserting / holding the cylindrical rubber product; an inner diameter of the cylindrical rubber product disposed at one end of the tubular body; A first end portion having an equal or small-diameter cylindrical portion, a connecting portion connecting the first end portion and the central portion, and a cylindrical shape disposed on the opposite side to the first end portion with respect to the central portion A second end portion having a cylindrical portion into which a rubber product is not inserted, and an inlet for introducing a compressed fluid into the second end portion, and a plurality of blowers on the connecting portion side of the central portion and the central portion side of the connecting portion. A tubular body having an outlet and a flow path connected to the plurality of outlets from the inlet into the tubular body;
A fixing member for fixing the tubular body;
In a state where the tubular body is fixed, connecting means for connecting the inlet and the inlet of the compressed fluid;
A feeding means for supplying a compressed fluid to the flow path in the tubular body through the inlet;
A device for inserting a small diameter cylindrical rubber product.   3. The small diameter cylindrical rubber product according to claim 2, wherein the blow-out port is disposed at a position where the outer periphery of the central portion and the outer periphery of the connection portion are substantially equally divided and are adjacent to each other. Insertion device.   The insertion of a small-diameter cylindrical rubber product according to claim 2 or 3, wherein a guide member is disposed at the second end portion, and the fixing member has a portion where the guide member can be engaged or fixed. apparatus.

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