JP4883418B2 - BOLT FOR MANUFACTURING ADHESIVE INSULATED RAIL AND MANUFACTURING METHOD USING THE SAME - Google Patents

Description

  The present invention relates to a technique for manufacturing an adhesively insulated rail that is installed to provide a track circuit for controlling a traffic light and a control section for a railroad crossing alarm on a railway track.

In railroad tracks, rail joints are weak points for maintenance, and they become a source of noise and vibration. Therefore, it is common to use long rails that have no joints by welding. However, since it is also necessary to divide the closed section in order to configure a track circuit for train control, the end of the closed section is configured as an adhesive insulating rail (for example, see Non-Patent Document 1).
As shown in FIGS. 6 and 7, the adhesive insulating rail 10 has an insulating material 14 inserted between the abutting rails 12, 12 of adjacent closed sections, and the side surfaces of the rails 12, 12 and the joint plate. The insulating adhesive sheet 24 is sandwiched between the rails 12 and 12, and the through holes 12a of the rails 12 and 12, the through holes 16a of the joint plate 16, and the through holes 24a of the insulating adhesive sheet 24 are made to coincide with each other. The tube 18 and the fastening bolt 20 are inserted into the hole. Then, the nut 22 is fastened to the fastening bolt 20, the seam plate 16 is brought into close contact with the side surfaces of the rails 12 and 12 via the insulating adhesive sheet 24, and the adhesive 26 is eluted from the insulating adhesive sheet 24 by heating. The rails 12 and 12 and the joint plate 16 are bonded so as to fill the gap between the through holes 12a and 16a and the tube 18.

Further, as shown in FIG. 8, the manufacturing procedure includes a surface treatment step S110, a preheating step S120, a primer coating step S130, an adhesion step S140, an adhesion step S150, and a fastening step S160. . First, the surface treatment step S110 is a step of polishing the rails 12, 12 and the joint plate 16, and the adhesive surfaces of the rails 12, 12 and the joint plate 16 are subjected to sand blast treatment, shot blast treatment or shot peening treatment, and this adhesion surface. The rust and the like are removed, and if necessary, the oil and fat content on the bonded surface is removed with a solvent such as acetone.
The subsequent preheating step S120 is a step of preheating the rails 12 and 12 and the joint plate 16, and the rails 12 and 12 and the joint plate 16 are preheated to a predetermined temperature in an electric furnace such as a rail heater. .

The primer application step S130 is a step of applying a primer to the rails 12 and 12 and the joint plate 16, and an epoxy liquid is applied to the bonding surfaces of the rails 12 and 12, the joint plate 16, the through holes 12a and 16a, and the insulating material 14. A surface treatment material such as a compounded resin or an epoxidized phenol resin-based primer is applied, and the adhesive surface is brought into a dry touch state.
In addition, the adhesion step S140 is a step in which an insulating adhesive 24 (prepreg) made of a laminated material in which a plurality of adhesive sheets are stacked is closely adhered between the side surfaces of the rails 12 and 12 and the joint plate 16. The tube 18 is inserted into the through holes 12 a, 16 a, and 24 a, and the fastening bolt 20 is inserted into the tube 18. Next, the insulating material 14 is inserted into the abutting portions of the rails 12 and 12, and the insulating adhesive sheet 24 is sandwiched between the side surfaces of the rails 12 and 12 and the side surface of the joint plate 16. Subsequently, the connecting bolt 28 (see FIG. 1) is screwed into the fastening bolt 20, the axial length of the fastening bolt 20 is extended, and the coil spring 34 (see FIG. 1) is connected to a pair of washers 30, 32 (see FIG. 1). And inserted into the connecting bolt 28 in a state of being sandwiched between the two. Then, the nut 22 is screwed into the connection bolt 28 to compress the coil spring 34, and the joint plate 16 is brought into close contact with the side surfaces of the rails 12 and 12 through the insulating adhesive sheet 24 by the elastic force of the coil spring 34.

Further, in the bonding step S150, the rails 12 and 12 and the joint plate 16 are bonded by the insulating adhesive sheet 24, and the adhesive 26 (see FIG. 7) is formed in the gap between the through holes 12a, 16a and 24a and the tube 18. The rails 12 and 12 are heated to a predetermined temperature by a rail heater, and the adhesive 26 is eluted from the insulating adhesive sheet 24. The adhesive 26 is filled in the gaps between the inner peripheral portions of the through holes 12 a, 16 a, and 24 a and the outer peripheral portion of the tube 18. Thereafter, the adhesive 26 is cured with a predetermined curing time by maintaining a predetermined curing temperature and heating uniformly.
The final fastening step S160 is a step of fastening the fastening bolt 20 and the nut 22 with a predetermined torque. After the adhesive 26 is cooled, the nut 22 is once loosened, and the connecting bolt 28 attached in the contact step S140, The pair of washers 30, 32 and the coil spring 34 are removed from the fastening bolt 20, and the fastening bolt 20 and the nut 22 are finally tightened with a predetermined torque. Then, a finish paint such as urethane paint is applied to the exposed portion of the adhesive 26 and the periphery thereof, and a series of manufacturing steps is completed (see, for example, Patent Document 1).

Adhesive insulation rail JIS E 1125-1995 Japan Standards Association JP 2006-348631 A ([0023] to [0029])

However, according to the conventional manufacturing procedure of the bonded insulating rail, when the adhesive 26 is eluted from the insulating adhesive sheet 24 in the bonding step S150, the inner peripheral portions of the through holes 12a, 16a, 24a and the outer periphery of the tube 18 are used. It is impossible to easily confirm visually that the air between the two parts is completely removed and the adhesive 26 is reliably filled in the gap. Further, when the adhesive 26 is filled in the gap between the inner peripheral portion of the through holes 12a, 16a, 24a and the outer peripheral portion of the tube 18, the adhesive 26 is also interposed between the tube 18 and the fastening bolt 20. A problem has also been pointed out that it flows in and is bonded together with the fastening bolt 20, making it difficult to replace the fastening bolt 20.
The present invention has been made in view of the above problems, and the object of the present invention is to easily confirm visually that an adhesive is reliably filled in a necessary part at the time of manufacturing an adhesive insulating rail. Is to promote the stabilization of quality. It is another object of the present invention to prevent an unnecessary part from being filled with an adhesive during manufacture of an adhesive insulating rail, and to easily perform a bolt replacement operation.

(Aspect of the Invention)
The following aspects of the present invention exemplify the configuration of the present invention, and will be described separately for easy understanding of various configurations of the present invention. Each item does not limit the technical scope of the present invention. Therefore, the technical aspects of the present invention also apply to those in which some of the constituent elements in each section are replaced, deleted, or other constituent elements are added while referring to the best mode for carrying out the invention. It can be included in the range.

(1) An insulating material is inserted between the abutted rails, and an insulating adhesive sheet is sandwiched between the side surface of the rail and the joint plate, and the through hole of the rail, the through hole of the joint plate, The through holes of the insulating adhesive sheet are made to coincide with each other, a tube and a fastening bolt are inserted into the through holes, a nut is fastened to the fastening bolt, and the side surface of the rail is interposed with the insulating adhesive sheet An adhesive insulating rail formed by adhering the rail and the joint plate so as to fill the gap between the through-hole and the tube with an adhesive that adheres the joint plate and is eluted from the insulating adhesive sheet when heated. And a flange for making the shaft part the same diameter as the fastening bolt and in close contact with the seam plate at the head, and a contact surface of the flange with the seam plate The hula The di peripheral surface shank of the root portion or manufacturing bolt which groove extends into the vicinity thereof are formed (claim 1).

The bolt for manufacturing an adhesive insulated rail described in this section is a method of manufacturing the adhesive insulated rail, in the adhesion process in which the joint plate is in close contact with the side surface of the rail via an insulating adhesive sheet during the process of manufacturing the adhesive insulated rail. The through-holes of the plate and the through-holes of the insulating adhesive sheet are made to coincide with each other, the tubes are inserted, and the manufacturing bolts are inserted into the through-holes. Furthermore, the connecting bolt is screwed into the manufacturing bolt to extend the axial length of the manufacturing bolt, the coil spring is inserted into the connecting bolt, the nut is screwed into the connecting bolt, the coil spring is compressed, and the elastic force of the coil spring A joint plate is brought into close contact with the side surface of the rail through an insulating adhesive sheet.
In the subsequent bonding step, the rail is heated to a predetermined temperature by a rail heater, so that the adhesive is eluted from the insulating adhesive sheet, and the gap is formed between the inner peripheral portion of the through hole and the outer peripheral portion of the tube. When filling the adhesive, air between the inner peripheral part of the through hole and the outer peripheral part of the tube is extracted from the groove extending from the outer peripheral surface of the flange of the bolt to the base part of the shaft part or the vicinity thereof. The gap is surely filled with an adhesive. Furthermore, it is easy to visually check that the adhesive has filled into the gap between the inner periphery of the through hole and the outer periphery of the tube by allowing the adhesive to ooze out from the groove to the outer peripheral surface of the flange. Is possible.

(2) A manufacturing bolt in which an annular protrusion is formed at the base of the shaft portion, which has a smaller diameter than the through hole of the joint plate and can be in close contact with the entire circumference of the end surface of the tube. ).
In the bolt for manufacturing an adhesive insulated rail described in this section, the inside of the tube is hermetically sealed by the annular protrusion formed on the base portion of the shaft portion being in close contact with the entire circumference of the end surface of the tube. Therefore, in the bonding step, the adhesive flows between the tube and the manufacturing bolt, and the bonding including the manufacturing bolt is prevented. In addition, the manufacturing bolt is finally replaced with a fastening bolt. At this time, the manufacturing bolt can be easily removed.

(3) Manufacturing in which the annular protrusion is configured such that the diameter thereof decreases toward the tip of the shaft, and the diameter of the portion in contact with the end surface of the tube is smaller than the outer diameter of the tube. Bolt (Claim 3).
In the bolt for manufacturing an adhesive insulated rail described in this paragraph, the diameter of the annular protrusion decreases toward the tip of the shaft portion, and the diameter of the portion in contact with the end surface of the tube is smaller than the outer diameter of the tube. By being configured to have a small diameter, in the bonding process, when the adhesive flows between the tube and the manufacturing bolt, the inner periphery of the through hole, the end surface of the tube, and the annular protrusion An adhesive is filled between the outer peripheral surface. The solidified adhesive exhibits an undercut shape that functions as a tube stopper.

(4) A manufacturing bolt according to (1) to (3) above, wherein at least a portion excluding the threaded portion is subjected to a surface treatment for promoting mold release (claim 4).
The bolt for production of the adhesive insulated rail described in this section is a surface treatment that promotes mold release (peeling of the adhesive from the bolt surface), so that the adhesive is eluted from the insulating adhesive sheet. When filling the gap between the inner periphery of the through hole and the outer periphery of the tube with the adhesive, even if the adhesive adheres to the manufacturing bolt, the manufacturing bolt eventually becomes the fastening bolt. It becomes possible to easily remove the manufacturing bolts when they are exchanged. Even when the manufacturing bolt is reused, the adhesive can be peeled off easily and reliably, and the cleaning work is not necessary. Further, by removing at least the threaded portion from the portion subjected to the surface treatment for promoting mold release, the screwing with the connection bolt (described later) screwed into the threaded portion of the manufacturing bolt in the adhesion process promotes the mold release. It is prevented from being obstructed by the treated layer.
In addition, as a specific example of the process which accelerates | stimulates mold release, the surface of the bolt for manufacture is coated with a fluororesin, or is subjected to nitriding (ceramic coating). In addition, the same release-promoting treatment (peeling of the adhesive from the surface of each component) is applied to the surface of the portion excluding the threaded portion of the connecting bolt used in the adhesion process, and the surface of the coil spring and washer used together with the connecting bolt. When the manufacturing bolt is finally replaced with a fastening bolt, the connection bolt, the coil spring, and the washer can be easily removed.

(5) A manufacturing bolt made of a ceramic material according to the above items (1) to (3) (claim 5).
The bolt for manufacturing the insulated insulating rail described in this section is made of a ceramic material, so that the adhesive is eluted from the insulating adhesive sheet, and the gap between the inner peripheral portion of the through hole and the outer peripheral portion of the tube. When filling the gap with adhesive, even if the adhesive adheres to the manufacturing bolt, it is easy to remove the manufacturing bolt when the manufacturing bolt is finally replaced with a fastening bolt Can be done.
Also, the connection bolt used in the adhesion process and the surface of the washer used together with the connection bolt are also made of a ceramic material, so that the connection when the manufacturing bolt is finally replaced with a fastening bolt. Bolts, coil springs and washers can be easily removed.

  (6) An insulating material is inserted between the abutted rails, and an insulating adhesive sheet is sandwiched between the side surface of the rail and the joint plate, and the through hole of the rail, the through hole of the joint plate, The through holes of the insulating adhesive sheet are made to coincide with each other, a tube and a fastening bolt are inserted into the through holes, a nut is fastened to the fastening bolt, and the side surface of the rail is interposed with the insulating adhesive sheet An adhesive insulating rail formed by adhering the rail and the joint plate so as to fill the gap between the through-hole and the tube with an adhesive that adheres the joint plate and is eluted from the insulating adhesive sheet when heated. The method includes a fastening step of the seam plate after at least a contact step and an adhesion step between the rail and the joint plate, and in the contact step, the through-hole of the rail and the joint Align the through hole of the plate, insert the tube, insert the manufacturing bolt according to any one of (1) to (5) above, and extend the axial length of the manufacturing bolt. A connecting bolt for screwing, a coil spring is inserted into the connecting bolt, a nut is screwed into the connecting bolt to compress the coil spring, and the elastic force of the coil spring causes an insulating bond to the side of the rail. The seam plate is brought into close contact with the sheet, and in the bonding step, the rail is heated to a predetermined temperature by a rail heater, so that the adhesive is eluted from the insulating adhesive sheet, and the inside of the through hole is The gap between the peripheral portion and the outer peripheral portion of the tube is filled with the adhesive, the adhesive is cured, and the nut is loosened in the seam plate fastening step, and the manufacturing is performed. Bolts, disconnect the connecting bolt and the coil spring, the manufacturing method by inserting the fastening bolts into the tube and the tightening the nut on the fastening bolt at a predetermined torque (claim 6).

  The manufacturing method of the adhesive insulated rail described in this section uses the manufacturing bolt described in the above section (1). Then, during the manufacturing process of the adhesive insulated rail, the adhesive is eluted from the insulating adhesive sheet by heating the rail to a predetermined temperature with a rail heater in the adhesive process, and the inner peripheral portion of the through hole and the tube When the adhesive is filled in the gap between the outer peripheral portion of the tube, the groove extending from the outer peripheral surface of the flange to the root portion of the shaft portion or the vicinity thereof, between the inner peripheral portion of the through hole and the outer peripheral portion of the tube. The air can be evacuated and the gap can be reliably filled with the adhesive. Furthermore, it is easy to visually check that the adhesive has filled into the gap between the inner periphery of the through hole and the outer periphery of the tube by allowing the adhesive to ooze out from the groove to the outer peripheral surface of the flange. Is possible.

  Furthermore, if the manufacturing bolt described in the above item (2) is used, in the bonding process, the annular protrusion formed on the base portion of the shaft portion of the flange adheres to the entire circumference of the end surface of the tube. Thus, the inside of the tube is sealed. Therefore, it can prevent that an adhesive agent flows in between a tube and a volt | bolt for manufacture, and it adhere | attaches also including a volt | bolt for manufacture. As described above, the manufacturing bolt is replaced with a fastening bolt in the joint plate fastening process, and at this time, the manufacturing bolt can be easily removed. In addition, since the fastening bolt is not attached in the bonding process, the adhesive may not adhere to the fastening bolt, and the fastening bolt can be easily replaced. In addition, since the annular protrusion is in close contact with the entire circumference of the end surface of the tube, the tube can be accurately positioned. In addition, it is possible to acquire the effect similar to the case of the cyclic | annular protrusion part of a manufacture volt | bolt by contacting the end surface of a tube also about a connection bolt.

  Further, if the manufacturing bolt described in the above (3) is used, the diameter of the annular protrusion decreases toward the tip of the shaft portion, and the diameter of the portion in contact with the end surface of the tube is It is comprised so that it may become a smaller diameter than the outer diameter of a tube. Accordingly, in the bonding process, when the adhesive flows between the tube and the manufacturing bolt, the adhesive is interposed between the inner peripheral portion of the through hole, the end surface of the tube, and the outer peripheral surface of the annular protrusion. Filled. Then, the solidified adhesive exhibits an undercut shape that functions as a tube stopper. Therefore, in the process of fastening the seam plate, it is possible to reliably prevent the tube from coming off when the manufacturing bolt is removed. In addition, for the connection bolt, the outer peripheral surface in the vicinity of one end contacting the end surface of the tube is formed by a tapered surface, and the diameter and the diameter are narrowed to obtain the same effect as that of the annular protrusion of the manufacturing bolt. Is possible.

  Further, if the manufacturing bolt described in the above (4) and (5) is used, in the bonding step, the rail is heated to a predetermined temperature by a rail heater, so that the insulating adhesive sheet can be used. Even if the adhesive is attached to the manufacturing bolt when the adhesive is eluted and the adhesive is filled in the gap between the inner peripheral portion of the through hole and the outer peripheral portion of the tube, When the bolt is finally replaced with a fastening bolt, it is possible to easily remove the manufacturing bolt.

  Since the present invention is configured as described above, it is possible to easily confirm visually that the adhesive is reliably filled in the necessary part at the time of manufacturing the adhesive insulating rail, and promote the stabilization of the quality. can do. In addition, when manufacturing the adhesive insulating rail, it is possible to prevent the adhesive from being filled in unnecessary portions and to easily perform the bolt replacement operation.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Here, parts that are the same as or equivalent to those of the prior art are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIGS. 2 and 3, the manufacturing bolt 36 (hereinafter referred to as “manufacturing bolt”) of the adhesive insulating rail according to the embodiment of the present invention has a diameter of the shaft portion 36 a of the fastening bolt 20 ( FIG. 7) is the same as FIG. 7), and a flange 36c is formed integrally with the head 36b to be in close contact with the seam plate. The flange 36c has a close contact surface 36d with the seam plate. Alternatively, a groove 36e extending to the vicinity thereof is formed.

Furthermore, an annular protrusion 36f that is smaller in diameter than the through hole 16a of the joint plate 16 and can be in close contact with the entire circumference of the end surface 18a (FIG. 1) of the tube 18 is formed at the base of the shaft portion 36a. The annular protrusion 36f is configured with a tapered outer peripheral surface so that the diameter decreases toward the tip of the shaft 36a. And the diameter of the part which contact | connects the end surface 18a of the tube 18 is smaller than the outer diameter of a tube.
In the illustrated example, a large-diameter flange 36g is formed so as to overlap the flange 36c in the axial direction, and a two-sided width 36h for preventing interference with the joint plate 16 is formed on the large-diameter flange 36g. . In addition, the length of the shaft portion 36a is the same as that of the fastening bolt 20 in the illustrated example. However, as will be described later, the connection bolt 28 is screwed and the coil spring 34 is sandwiched between a pair of washers 30 and 32. Thus, it is not always necessary to have the same axial length as that of the fastening bolt 20 as long as the coil spring 34 can be compressed by inserting the nut 22 into the connection bolt 28 and screwing the nut 22 into the connection bolt 28.

Moreover, it is good also as giving the surface process which accelerates | stimulates mold release to the part except the screw part 36j shown by FIG. 2, FIG. In addition, as a specific example of the process which accelerates | stimulates mold release, the surface of the bolt 36 for manufacture is coated with a fluororesin, or a nitriding process is performed (ceramic coating). In this case, the surface of the portion excluding the screw portions 28c and 28d of the connection bolt 28 (FIG. 5) used in the adhesion step (S140) described later, the coil spring 34 (FIG. 1) used together with the connection bolt 28, It is desirable to perform the same release promoting treatment on the surface of the washer 30 (FIGS. 1 and 4). The thickness of the fluororesin layer is appropriately determined in consideration of strength and clearance necessary for insertion of the manufacturing bolt 36 into the tube 18 and insertion of the connection bolt 28 into the washer 30 and the coil spring 34. is there.
The manufacturing bolt 36 may be made of a ceramic material, and the connection bolt 28 and the washer 30 may be made of a ceramic material.

Now, the manufacturing procedure of the bonded insulated rail 10 (FIG. 6) using the manufacturing bolt 36 is roughly the same as the conventional manufacturing procedure shown in FIG. And in fastening process S160, it becomes the following work content.
First, in the adhesion step S140, as shown in FIG. 1, the through holes 12a of the rails 12 and 12, the through holes 16a of the joint plate 16, and the through holes 24a of the insulating adhesive sheet 24 are matched. The tubes 18 are inserted into these through holes, and the manufacturing bolts 36 are inserted into the tubes 18. Subsequently, the connecting bolt 28 is screwed into the manufacturing bolt 36 to extend the axial length of the manufacturing bolt 36. Then, with the coil spring 34 sandwiched between the pair of washers 30 and 32, the coil spring 34 is inserted into the connection bolt 28, and the nut 22 is screwed into the connection bolt 28 to compress the coil spring 34. Then, the joint plate 16 is brought into close contact with the side surfaces of the rails 12 and 12 through the insulating adhesive sheet 24 by the elastic force of the coil spring 34.

  Of the set of washers 30 and 32 used here, as shown in FIG. 4, a boss 30a that contacts the seam plate 16 is formed for the washer 30 that directly contacts the seam plate 16. The boss 30 a is formed with a two-sided width 30 b for preventing interference with the joint plate 16. The connecting bolt 28 has the same diameter as that of the fastening bolt 20 (FIG. 7). However, as shown in FIG. 5, the outer peripheral surface in the vicinity of the end portion 28a that contacts the end surface 18a of the tube 18 is a tapered surface. By narrowing down the diameter, the diameter of the portion in contact with the end surface 18a of the tube 18 is smaller than the through hole 16a of the joint plate 16 and smaller than the outer diameter of the tube 18. In addition, a two-sided width 28b is formed in the intermediate portion for engaging the tool when attaching and detaching.

  Further, in the seam plate fastening step S160, the nut 22 is loosened, and the manufacturing bolt 36, the connecting bolt 28, the pair of washers 30 and 32, and the coil spring 34 attached in the contact step S140 are removed. Then, the fastening bolt 20 (FIG. 7) is inserted into the tube 18 and the nut 22 is finally tightened to the fastening bolt 20 with a predetermined torque. Then, a finish paint such as urethane paint is applied to the exposed portion of the adhesive 26 and the periphery thereof, and a series of manufacturing steps is completed.

  According to the embodiment of the present invention configured as described above, the following operational effects can be obtained. First, during the manufacturing process of the adhesive insulated rail (FIG. 8), the manufacturing bolt 36 is inserted into the tube 18 and the connection bolt 28 is screwed into the manufacturing bolt 36 to extend the axial length of the manufacturing bolt 36. Then, the coil spring 34 is inserted into the connection bolt 28, the nut 22 is screwed in and the coil spring 34 is compressed, and the elastic force of the coil spring 34 causes the side surfaces of the rails 12, 12 to pass through the insulating adhesive sheet 24. The joint plate 16 is brought into close contact.

In the subsequent bonding step S150 (FIG. 8), the rails 12 and 12 are heated to a predetermined temperature by the rail heater, so that the adhesive 26 is eluted from the insulating adhesive sheet 24, and the through holes 12a, 16a, When filling the gap between the inner peripheral part of 24a and the outer peripheral part of the tube 18 with the adhesive, from the groove 36e of the flange 36c of the bolt 36 for manufacturing, the inner peripheral part through holes 12a, 16a, 24a of the through holes. And the outer periphery of the tube 18 are evacuated, and the adhesive 26 is surely filled into the gap. Further, the adhesive 26 oozes out from the groove 36e to the outer peripheral surface of the flange 36c, so that the adhesive 26 is filled in the gaps between the inner peripheral portions of the through holes 12a, 16a, 24a and the outer peripheral portion of the tube 18. This can be easily confirmed visually.
In addition, since the diameter of the one end portion 28a of the connection bolt 28 is narrowed down and smaller than the through hole 16a of the joint plate 16, the connection bolt 28 is removed in the joint plate fastening step S160, and the joint plate 28 is removed. When the through hole 16a of the plate 16 is exposed, it is possible to visually check the seepage of the adhesive 26 around the through hole 16a and to grasp that the adhesive 26 is sufficiently filled.

In addition, the annular protrusion 36f formed at the base of the shaft portion 36a of the manufacturing bolt 36 is in close contact with the entire circumference of the end surface 18a of the tube 18, whereby the inside of the tube 18 is sealed. Therefore, in the bonding step S150, it is possible to prevent the adhesive from flowing between the tube 18 and the manufacturing bolt 36 and bonding the manufacturing bolt 36 and the like.
Therefore, the manufacturing bolt 36 is replaced with a fastening bolt in the joint plate fastening step S160 (FIG. 8). At this time, the manufacturing bolt 36 can be easily removed. In the bonding step S150 (FIG. 8), since the fastening bolt 20 is not attached, the adhesive 26 cannot be attached to the fastening bolt 20, and the fastening bolt 20 can be easily replaced.
In addition, since the annular protrusion 36f is in close contact with the entire circumference of the end surface 18a of the tube 18, the tube 18 can be accurately positioned. Note that the connection bolt can also be brought into contact with the end face of the tube to obtain the same effect as that of the annular protrusion 36f of the manufacturing bolt 36. In particular, since the tube 18 is sandwiched by the annular protrusion 36f and the end face 18a from both ends, the positioning effect of the tube 18 can be obtained more reliably.

In addition, when the manufacturing bolt 36 is subjected to a surface treatment that promotes mold release, even if the adhesive 26 adheres to the manufacturing bolt 36 in the bonding step S150, the manufacturing bolt 36 is It is possible to easily remove the manufacturing bolt 36 during the fastening step S160 where the fastening bolt 20 is finally replaced. Even when the manufacturing bolt 36 is reused, the adhesive 26 can be easily and reliably peeled off, and a cleaning operation is not necessary. Further, by removing at least the screw portion 36j from the portion subjected to the surface treatment for promoting mold release, the screwing with the connection bolt 28 screwed into the screw portion 36j of the manufacturing bolt 36 in the adhesion step S140 is inhibited. It is preventing. In addition, the same release-promoting treatment is performed on the surface of the connection bolt 28 excluding the screw portions 28c and 28d, and the surface of the coil spring 34 and washer 30 used together with the connection bolt 28, so that the manufacturing bolt The connection bolt 28, the coil spring 34, and the washer 30 can be easily removed when 36 is finally replaced with the fastening bolt 20.
In the bonding step S150, the atmosphere temperature is temporarily raised to about 230 ° C. in order to ensure the quality of the adhesive 26. However, since the heat resistant temperature of the fluororesin is about 260 ° C., the fluororesin layer is formed. In this case, this layer does not thermally deteriorate in the bonding step S150.

  Further, since the manufacturing bolt 36 is made of a ceramic material, it is possible to obtain the same function and effect. In this case, the connection bolt 28 and the washer 30 are also made of a ceramic material, so that the connection bolt 28 and the washer 30 can be removed when the manufacturing bolt 36 is finally replaced with the fastening bolt 20. It can be easily performed.

Further, the annular protrusion 36f of the manufacturing bolt 36 has a tapered surface on the outer peripheral surface so that the diameter decreases toward the tip of the shaft portion 36a. The diameter is smaller than the outer diameter of the tube 18. Therefore, when the adhesive 26 flows between the tube 18 and the manufacturing bolt 36 in the bonding step S150 (FIG. 8), the inner peripheral portions of the through holes 12a, 16a, and 24a, and the end surface 18a of the tube 18 The adhesive 26 is filled with the outer peripheral surface of the annular protrusion 36f to solidify, and the solidified adhesive 26 exhibits an undercut shape that functions as a retaining stopper for the tube 18. As a result, it is possible to reliably prevent the tube 18 from being detached when the manufacturing bolt 36 is removed in the seam plate fastening step S160 (FIG. 8). In order to obtain the same function and effect, the outer peripheral surface of the annular protrusion 36f may be configured with a curved surface whose diameter decreases toward the tip of the shaft portion 36a.
Also, the connection bolt 28 has an outer peripheral surface in the vicinity of the one end portion 28a that is in contact with the end surface 18a of the tube 18 and is tapered so that the diameter is narrowed down. An effect can be obtained.

It is principal part sectional drawing of the rail which shows the state of the adhesion process in the manufacturing method using the volt | bolt for manufacture of the adhesion insulation rail based on embodiment of this invention. It is a perspective view of the volt | bolt for manufacture of the adhesive insulation rail shown by FIG. It is a single figure of the volt | bolt for manufacture of the adhesive insulation rail shown by FIG. 1, (a) is a front view, (b) is a right view. It is a single figure of the washer used with the volt | bolt for manufacture of the adhesion | attachment insulated rail shown by FIG. 1, (a) is a front view, (b) is a right view. It is a single figure of the connecting bolt used with the volt | bolt for manufacture of the adhesion | attachment insulated rail shown by FIG. 1, (a) is a front view, (b) is a right view. It is a principal part front view of an adhesion insulation rail. It is AA sectional drawing of FIG. It is a flowchart which shows the manufacture procedure of a contact insulation rail.

Explanation of symbols

  10: Adhesive insulating rail, 12: Rail, 12a, 16a, 24a: Through hole, 14: Insulating material, 16: Seam plate, 18: Tube, 20: Fastening bolt, 22: Nut, 24: Insulating adhesive sheet, 26: Adhesive, 28: Connection bolt, 28c, 28d: Threaded part, 34: Coil spring, 36: Bolt for manufacturing an adhesive insulating rail, 36a: Shaft part, 36b: Head, 36c: Flange, 36d: Contact surface with seam plate, 36e: groove, 36f: annular projection, 36j: screw

Claims (6)

An insulating material is inserted between the abutted rails, and an insulating adhesive sheet is sandwiched between the side surface of the rail and the joint plate, the through hole of the rail, the through hole of the joint plate, and the insulation The joint plate through which the tube and the fastening bolt are inserted, the nut is fastened to the fastening bolt, and the side surface of the rail is interposed through the insulating adhesive sheet. Manufacture of an adhesive insulating rail formed by adhering the rail and the joint plate so as to fill a gap between the through hole and the tube with an adhesive that is eluted from the insulating adhesive sheet by heating. Bolts for
The shaft has the same diameter as that of the fastening bolt, and a flange is formed integrally with the joint plate at the head, and the shaft is connected to the contact surface of the flange with the joint plate from the outer peripheral surface of the flange. A manufacturing bolt, characterized in that a groove extending to the base part of the part or the vicinity thereof is formed. The ring-shaped protrusion part which is smaller diameter than the through-hole of the said seam board, and can be closely_contact | adhered to the perimeter of the end surface of the said tube is formed in the root part of the said shaft part. Bolt for manufacturing. The annular protrusion is configured such that the diameter thereof decreases toward the tip of the shaft portion, and the diameter of the portion in contact with the end surface of the tube is smaller than the outer diameter of the tube. The manufacturing bolt according to claim 2. The manufacturing bolt according to any one of claims 1 to 3, wherein at least a portion excluding the threaded portion is subjected to a surface treatment for promoting mold release. 4. The manufacturing bolt according to claim 1, wherein the manufacturing bolt is made of a ceramic material. An insulating material is inserted between the abutted rails, and an insulating adhesive sheet is sandwiched between the side surface of the rail and the joint plate, the through hole of the rail, the through hole of the joint plate, and the insulation The joint plate through which the tube and the fastening bolt are inserted, the nut is fastened to the fastening bolt, and the side surface of the rail is interposed through the insulating adhesive sheet. A method of manufacturing an adhesive insulating rail, in which the rail and the joint plate are bonded to each other by filling the gap between the through hole and the tube with an adhesive that elutes from the insulating adhesive sheet by heating. Because
At least, after the adhesion step and the adhesion step of the rail and the joint plate, including a fastening step of the joint plate,
In the contact step, the through hole of the rail and the through hole of the joint plate are made to coincide with each other, a tube is inserted, and the manufacturing bolt according to any one of claims 1 to 5 is inserted into the tube. The connecting bolt for extending the axial length is screwed into the manufacturing bolt, the coil spring is inserted into the connecting bolt, the nut is screwed into the connecting bolt, the coil spring is compressed, and the elastic force of the coil spring By adhering the joint plate to the side surface of the rail through an insulating adhesive sheet,
In the bonding step, by heating the rail to a predetermined temperature by a rail heater, the adhesive is eluted from the insulating adhesive sheet, and between the inner peripheral portion of the through hole and the outer peripheral portion of the tube. Fill the gap with the adhesive, cure the adhesive,
In the fastening step of the joint plate, the nut is loosened, the manufacturing bolt, the connection bolt and the coil spring are removed, the fastening bolt is inserted into the tube, and the nut is tightened with a predetermined torque. The manufacturing method characterized by carrying out final fastening by.

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