WO2020189514A1

WO2020189514A1 - Adjustable pad pouch

Info

Publication number: WO2020189514A1
Application number: PCT/JP2020/010881
Authority: WO
Inventors: 哲男大野; 誠二股
Original assignee: 神東塗料株式会社
Priority date: 2019-03-19
Filing date: 2020-03-12
Publication date: 2020-09-24
Also published as: JP7279878B2; JP2020153134A; TW202039965A

Abstract

The adjustable pad pouch according to the present invention is an adjustable pad pouch (1) formed by welding peripheral portions (11) of two sheets made of resin, the adjustable pad pouch (1) comprising a substantially rectangular pouch body (12), a flat, tubular inlet portion (14) connected to a predetermined first corner portion (13) of the pouch body (12), and a flat, tubular air discharge portion (16) connected to a second corner portion (15) diagonally opposite to the first corner portion (13) of the pouch body (12). The inlet portion (14) has, in the vicinity of the first corner portion (13), a part (18) where an injection flow passage (17) for a filler (2) is narrow. The air discharge portion (16) has, in the vicinity of the second corner portion (15), a part (20) where an air ventilation passage (19) is narrow, and a part (22) extending along the direction from the second corner portion (15) toward a third corner portion (21) adjacent to the second corner portion (15).

Description

Variable pad bag

The present invention relates to an improvement of a variable pad bag used for a resin injection type variable pad interposed between the bottom surface of a rail and a tie plate together with a track pad.

When fastening the rail to the track slab or PC sleeper, the tie plate is fixed to these track slabs or PC sleepers, and the rail is placed on this tie rate with the variable pad and track pad sandwiched between them to hold the rail.

The variable pad is a flat and flexible bag body, and two laminated sheet materials laminated with sheets such as polyethylene, polypropylene, EVA (polyethylene vinyl acetate), and nylon are laminated and cut out into a predetermined shape. The peripheral edges of these upper and lower sheets are bonded or welded, and a filler is injected into a flat and flexible bag for a variable pad. The variable pad bag has a bag body, an inlet portion extending from the bag body, and an air vent portion.

The height of the rail surface is adjusted by injecting the filler into the bag body of this variable pad bag from the injection port and adjusting the injection amount of the filler. As the filler to be injected, a two-component mixed type is often used. The main agent and the curing agent, which are liquid resins, are mixed immediately before the injection and injected into the variable pad bag, and then cured to form the variable pad. It is formed (see, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2004-239048 Japanese Unexamined Patent Publication No. 2005-282112

In the above-mentioned conventional technique, in the variable pad bag, the inlet portion and the air vent portion extending from the bag body are filled with a filler inside and hang down below the bottom surface of the rail. There is a problem that the uncured filler leaks to the outside from the injection port portion and the air vent portion and contaminates the orbit after the filler is injected into the container and before the filler is cured.

In addition, when cutting the inlet and air vents after the filler has hardened, the operator manually works on the inlets and air vents below the bottom of the rail using a cutting tool such as a saw or chisel. It is necessary to perform the excision work at the site, and there is a problem that such excision work requires a great deal of labor.

An object of the present invention is to prevent leakage of the uncured filler to the outside, facilitate the excision work of the inlet portion and the air vent portion after the filler is cured, and reduce the labor of the excision work. To provide a pad bag.

In the present invention, the peripheral edge of two sheets of resin of a variable pad interposed between the bottom surface of the rail and the tie plate and used to adjust the height of the rail according to the filling amount of the filler. It is a bag for variable pads formed by welding
Approximately rectangular bag body and
A flat tubular injection port connected to a predetermined first corner of the bag body, and
A flat tubular air bleeding portion that is diagonally connected to the second corner portion on the opposite side of the first corner portion of the bag body is provided.
The injection port portion is a bag for a variable pad characterized by having a portion in the vicinity of the first corner portion where the injection flow path of the filler is narrowed.

Further, the present invention is characterized in that the portion of the injection port where the injection flow path is narrowed is due to welding.

Further, the present invention is the peripheral edge of two sheets made of resin, which is a variable pad interposed between the bottom surface of the rail and the tie plate and used to adjust the height of the rail according to the filling amount of the filler. A variable pad bag formed by welding the parts.
Approximately rectangular bag body and
A flat tubular injection port connected to a predetermined first corner of the bag body, and
A flat tubular air vent portion that is diagonally connected to the second corner portion on the opposite side of the first corner portion of the bag body is provided.
The air venting portion is a bag for a variable pad characterized by having a portion in the vicinity of the second corner portion where an air ventilation flow path is narrowed.

Further, the present invention is characterized in that the portion of the air vent portion where the air flow path is narrowed is due to welding.

Further, in the present invention, the peripheral edge of two sheets made of resin of a variable pad interposed between the bottom surface of the rail and the tie plate and used for adjusting the height of the rail according to the filling amount of the filler. It is a bag for variable pads formed by welding parts.
Approximately rectangular bag body and
A flat tubular injection port connected to a predetermined first corner of the bag body, and
A flat tubular air vent portion connected to the second corner portion diagonally opposite to the first corner portion of the bag body is provided.
The air bleeding portion is a bag for a variable pad having a portion extending from the second corner portion toward the third corner portion adjacent to the second corner portion.

Further, in the present invention, the peripheral edge of two sheets made of resin of a variable pad interposed between the bottom surface of the rail and the tie plate and used for adjusting the height of the rail according to the filling amount of the filler. It is a bag for variable pads formed by welding parts.
Approximately rectangular bag body and
A flat tubular injection port connected to a predetermined first corner of the bag body, and
A flat tubular air vent portion connected to the second corner portion diagonally opposite to the first corner portion of the bag body is provided.
The injection port portion has a portion in the vicinity of the first corner portion where the injection flow path of the filler is narrowed.
The air vent is
A portion where the air flow path is narrowed near the second corner, and
The variable pad bag is characterized by having a portion extending from the second corner portion in a direction toward a third corner portion adjacent to the second corner portion.

According to the present invention, since the injection port portion has a portion where the injection flow path of the filler is narrowed in the vicinity of the first corner portion, the filler flows into the narrowed portion after the filler is injected. The thickness of the filled material is reduced, the injection port portion can be bent upward, and the filler can be prevented from leaking to the outside through the injection port portion. Further, since the injection port portion can be bent upward, the operator can easily cut the injection port portion using a cutting tool such as scissors after the filler is cured, and the filler is cured. It is possible to facilitate the excision work of the injection port portion after the removal work and reduce the labor of the excision work.

Further, according to the present invention, since the portion where the injection flow path of the injection port portion is narrowed is due to welding, the injection flow path of the injection port portion is narrowed after the filler is injected into the variable pad bag. The thickness near the part is thin due to welding, and the cutting work of the injection port after the filler is cured can be easily cut using a general-purpose cutting tool such as scissors without using a special cutting tool. can do.

Further, according to the present invention, since the air vent portion has a portion where the air ventilation flow path is narrowed in the vicinity of the second corner portion, the filler flows into the narrowed portion after the filler is injected. The thickness of the filler becomes thin, the air vent portion can be bent upward, and the filler can be prevented from leaking to the outside through the air vent portion. Further, since the air bleeding portion can be bent upward, the operator can easily cut the air bleeding portion using a cutting tool such as scissors after the filler is cured, and after the filler is cured. It is possible to facilitate the excision work of the air bleeding portion and reduce the labor of the excision work.

Further, according to the present invention, the portion where the ventilation flow path of the air vent portion is narrowed is due to welding, so that the ventilation flow path of the air vent portion becomes narrow after the filler is injected into the variable pad bag. The thickness near the part is thin due to welding, and the cutting work of the air vent after the filler is cured can be easily cut using a general-purpose cutting tool such as a shears without using a special cutting tool. it can.

Further, according to the present invention, since the air bleeding portion has a portion extending from the second corner portion toward the third corner portion adjacent to the second corner portion, the air bleeding portion is the first after the filler is injected. It is possible to bend the portion extending toward the three corners upward and hook it to the lower flange of the rail, and it is possible to prevent the filler from leaking to the outside through the air vent portion. Further, since the portion of the air vent portion extending toward the third corner can be bent upward, the operator can easily cut the air vent portion using a cutting tool such as scissors after the filler is cured. This can be done, facilitating the cutting work of the air vent portion after the filler has hardened, and reducing the labor of the cutting work.

Further, according to the present invention, since the injection port portion has a portion where the injection flow path of the filler is narrowed near the first corner portion, the injection flow path is narrowed after the filler is injected. The thickness of the inflowing filler becomes thin, the injection port portion can be bent upward, and the filler can be prevented from leaking to the outside through the injection port portion. Further, since the air vent portion has a portion where the air ventilation flow path is narrowed near the second corner portion, the thickness of the filler flowing into the portion where the ventilation flow path is narrowed after the filler is injected is thin. Therefore, the air vent portion can be bent upward, and the filler can be prevented from leaking to the outside through the air vent portion. Further, since the air vent portion has a portion extending from the second corner portion toward the third corner portion adjacent to the second corner portion, after injecting the filler, the air vent portion is directed toward the third corner portion of the air vent portion. It is possible to bend the extending portion upward and hang it on the lower flange of the rail, and it is possible to prevent the filler from leaking to the outside through the air vent portion.

Since the inlet and the air vent can be bent upward in this way, the operator can easily cut the inlet and the air vent using a cutting tool such as scissors after the filler is cured. This makes it possible to facilitate the cutting work of the injection port portion and the air bleeding portion after the filler is cured, and reduce the labor of the cutting work.

Objectives, features, and advantages of the present invention will become clearer from the detailed description and drawings below.
It is a top view which shows the variable pad 3 which used the variable pad bag 1 of one Embodiment of this invention. It is sectional drawing which shows the rail fastening part 5 of the track slab 10 on which the variable pad 3 is laid.

A preferred embodiment of the present invention will be described in detail with reference to the drawings below.

FIG. 1 is a plan view showing a variable pad 3 using the variable pad bag 1 according to the embodiment of the present invention, and FIG. 2 is a cross section showing a rail fastening portion 5 of a track slab 10 on which the variable pad 3 is laid. It is a figure. The variable pad bag 1 of the present embodiment is interposed between the bottom surface 7 of the rail 6 and the tie plate 8, and is used to adjust the height of the rail 6 according to the filling amount of the filler 2. Used as. The variable pad bag 1 is formed by welding the peripheral edges 11 of two sheets made of resin.

The variable pad bag 1 includes a substantially rectangular bag body 12, a flat tubular injection port 14 connected to a predetermined first corner portion 13 of the bag body 12, and a first corner portion of the bag body 12. A flat tubular air bleeding portion 16 connected to the second corner portion 15 on the diagonally opposite side to the 13 is provided. The injection port portion 14 has a portion 18 in which the injection flow path 17 of the filler 2 is narrowed in the vicinity of the first corner portion 13. The air vent portion 16 includes a portion 20 in which the air ventilation flow path 19 is narrowed in the vicinity of the second corner portion 15, and a third corner portion 21 adjacent to the second corner portion 15 to the second corner portion 15. It has a portion 22 extending along the direction toward.

The track slab 10 is a PC (Prestressed Concrete) floor slab having a length of 2 to 3 m in the length direction of the rail 6 (the direction perpendicular to the paper surface in FIG. 2), and is laid on the roadbed. An insulating plate 23 made of rubber is laid on the track slab 10, and a tie plate 8 is laid on the insulating plate 23. The tie plate 8 is fixed to the track slab 10 by anchor bolts 24 and nuts 25.

The anchor bolt 24 and the tie plate 8 are electrically insulated by the insulating collar 26. The insulating collar 26 is realized, for example, by an injection-molded product of a polycarbonate resin mixed with short glass fibers. The anchor bolt 24 is tightened by inserting an insulating sheet 23, a tie plate 8, an iron cover plate 28, an insulating collar 26, a washer 29, a spring washer 30 and a washer 31 and screwing a nut 25. In this way, the tie plate 14 is fixed to the track slab 10 in a state of being electrically insulated from the anchor bolt 24 by the insulating collar 26.

The rail 6 is mounted on the tie plate 8 via the variable pad 3 and the track pad 33, and is pressed by the leaf spring 42. The leaf spring 42 is fixed to the tie plate 8 by bolts 44 and nuts 45. In the tie plate 8, a pair of protruding walls 46 for positioning the lower flange 6a of the rail 6 are integrally formed. These protruding walls 46 are provided so as to project upward at intervals substantially matching the width of the lower flange 6a of the rail 6. The variable pad 3 and the track pad 33 are laid between these protrusions 46, on which the lower flange 6a of the rail 6 is mounted. These protrusions 46 regulate the lateral displacement of the rail 6. The track pad 33 has a metal plate 50 made of a stainless steel plate and a rubber plate 51 adhered to the lower surface of the metal plate 50.

As described above, the variable pad 3 is obtained by injecting a filler into a flat bag body 12 having a substantially rectangular planar shape from an injection port portion 14 and hardening the bag body 3. The variable pad bag 1 is formed by double-layering a multi-layer sheet material obtained by laminating a polyethylene or polyethylene sheet and a nylon sheet, cutting out the bag into a predetermined shape, and welding the peripheral edges of the upper and lower sheets.

The variable pad 3 is a flat surface in which the length dimension of the bag body 12 in the vertical direction in FIG. 1 is larger than the distance between the inner surfaces of the protruding walls 46 of the tie plate 8 in a state where the filler 2 is filled. It is a flat body that is substantially rectangular in view. The above-mentioned injection port portion 14 and air bleeding portion 16 are provided at diagonal positions at both ends of the bag body 3 in the longitudinal direction. Each of the inlet portion 14 and the air vent portion 16 is a flat tubular body protruding outward from a diagonal position. The inflow of the filler 2 into the bag body 12 is allowed into the injection flow path 17 of the injection port 14, and the outflow of the filler 2 from the bag body 12 to the tip of the injection port 14 is blocked. A check valve 50 is built in. Further, a filling plug 52 is provided in the air flow path 19 of the air vent portion 16.

When adjusting the height of the rail 6 with the variable pad 3, a liquid filler is injected from the injection port portion 14, the air in the bag body 12 is dissipated to the atmosphere through the air vent portion 16, and then the filler is used. 2 is performed by controlling the injection amount of the filler while the filling plug 52 is closed. The filling material is injected by the filling device, and the height of the rail 6 can be adjusted to an appropriate height depending on the amount of the filling material to be filled. After such height adjustment, the filler 2 is cured after a predetermined time. As the filler 2, a two-component mixed type is used, in which the main agent and the curing agent, which are liquid resins, are mixed immediately before injection, injected into the variable pad bag 1, and then cured, and the variable pad 3 is used. Is formed.

Since the variable pad 3 has a portion 18 in which the injection flow path 17 of the filler 2 is narrowed in the vicinity of the first corner portion 13 by welding the welded portion 18a, the resin thickness of the base portion of the injection flow path 17 is formed. Is thinned and can be bent, and once the worker manually bends it, the state is maintained, so that leakage can be suppressed by bending it upward.

Since the air vent portion 16 is provided by welding the welded portion 20a to the portion 20 where the air ventilation flow path 19 is narrowed in the vicinity of the second corner portion 15, the resin thickness at the base portion of the air vent portion 16 is thin. It becomes possible to bend it, and once the operator manually bends it, the state is maintained, so that leakage can be suppressed by bending it upward. Further, since the air vent portion 16 has a portion 22 extending from the second corner portion 15 toward the third corner portion 21 adjacent to the second corner portion 15, the length of the portion after the filling plug 52 The length is extended, which can extend the time it takes for the filler to reach the outside of the bag and prevent leakage. Further, since the air bleeding portion 16 has a portion 22 extending from the second corner portion 15 toward the third corner portion 21 adjacent to the second corner portion 15, the air bleeding portion 16 has a portion 22 after the filler 2 is injected. The operator can bend the portion 22 extending toward the third corner portion 21 upward and hook it to the lower flange of the rail 6, and the filler 2 leaks to the outside through the air vent portion 16. Can be prevented.

The present inventor conducted the following excision test and leakage test on three types of variable pads 3 having thicknesses of 3 mm, 8 mm, and 13 mm using the variable pad bag 1.
(1) Variable pad injection conditions Filling material: SP-104 manufactured by Shinto Paint Co., Ltd.
Injector: Tip mixing type injector manufactured by Shinto Paint Co., Ltd. Injection pressure: 0.1 MPa
Injection thickness: 3 mm, 8 mm, 13 mm
Gelation / curing time: 30 minutes, 60 minutes

(2) Test results The results of the leak test of the filler and the excision test after curing are shown in Table 1 below. In Table 1, regarding the leakage of the filler from the injection port portion 14, the “◯” mark indicates that no leakage occurred, and the “x” mark indicates that leakage occurred. Further, regarding the leakage of the filler from the air vent portion 16, the “◯” mark indicates that no leakage occurred, and the “x” mark indicates that a leakage occurred. As for the excision test, 18 and 20 extension cutting tests were performed one day after the filler was injected. In Table 1, "○" indicates the case where the excision was possible with scissors, and "x" indicates the case where the excision was impossible with the scissors.

In Comparative Examples 1 to 3, when the injection thickness was thin, the injection port portion 14 hung down on the slab surface, and a small amount of filler leaked to the slab surface. In the air vent portion 16, the resin reached the outside of the bag 20 minutes after the injection, and several drops leaked to the slab surface.

In Examples 1 to 3, it was confirmed that it is possible to stably maintain the bent state upward by bending the injection port portion 14 and the air vent portion 16 after injection at all injection thicknesses. From this, it was confirmed that the leakage of the filler can be completely suppressed by directing the injection port portions 14 of Examples 1 to 3 upward. Further, it was confirmed that in the air venting portions 16 of Examples 1 to 3, the filler was gelled in the bag by the extension after the filling plug 52, and the leakage could be completely suppressed.

In Examples 1 to 3, it was confirmed that the resin thickness of the excised part was thin and that it could be easily excised with scissors.

The following embodiments (1) to (6) are possible in the present invention.
(1) The variable pad bag of the present embodiment is interposed between the bottom surface 7 of the rail 6 and the tie plate, and is used to adjust the height of the rail 6 according to the filling amount of the filler. The variable pad bag 1 formed by welding the peripheral edges 11 of two sheets made of resin.
Approximately rectangular bag body 12 and
A flat tubular injection port 14 connected to a predetermined first corner 13 of the bag body 12 and
A flat tubular air bleeding portion 16 that is connected to the first corner portion 13 of the bag body 12 and the second corner portion 15 that is diagonally opposite to the first corner portion 13 is provided.
The injection port portion 14 is a variable pad bag characterized by having a portion 18 in which the injection flow path 17 of the filler 2 is narrowed in the vicinity of the first corner portion 13.

According to such a configuration, since the injection port portion 14 has a portion 18 in which the injection flow path 17 of the filler 2 is narrowed in the vicinity of the first corner portion 13, the injection flow path after the filler 2 is injected. The thickness of the filler 2 that has flowed into the portion 18 where 17 is narrowed becomes thin, the injection port 14 can be bent upward, and the filler 2 leaks to the outside through the injection port 14. Can be prevented. Further, since the injection port portion 14 can be bent upward, the operator can easily cut the injection port portion 14 using a cutting tool such as scissors after the filler 2 is cured, and the filling material 2 can be filled. The cutting work of the injection port portion 14 after the material 2 is hardened can be facilitated, and the labor of the cutting work can be reduced.

(2) Further, the variable pad bag of the present embodiment is characterized in that the portion 18 of the injection port portion 14 in which the injection flow path 17 is narrowed is due to welding 18a.

According to such a configuration, since the portion 18 in which the injection flow path 17 of the injection port portion 14 is narrowed is due to the welding 18a, the injection port is formed after the filler 2 is injected into the variable pad bag 1. The thickness of the vicinity of the portion 18 where the injection flow path 17 of the portion 14 is narrowed is thin due to welding, and the cutting work of the injection port portion 14 after the filler 2 is cured can be generalized without using a dedicated cutting tool. It can be easily cut using a cutting tool such as a pair of scissors.

(3) Further, the variable pad bag of the present embodiment is interposed between the bottom surface 7 of the rail 6 and the tie plate 8, and is used to adjust the height of the rail 6 according to the filling amount of the filler 2. A variable pad bag 1 formed by welding the peripheral edges 11 of two sheets of the variable pad 3 made of resin.
Approximately rectangular bag body 12 and
A flat tubular injection port 14 connected to a predetermined first corner 13 of the bag body 12 and
A flat tubular air bleeding portion 16 that is connected to the first corner portion 13 of the bag body 12 and the second corner portion 15 on the opposite side diagonally is provided.
The air vent portion 16 is a variable pad bag characterized by having a portion 20 in which the air ventilation flow path 19 is narrowed in the vicinity of the second corner portion 15.

According to such a configuration, since the air vent portion 16 has a portion 20 in which the air ventilation flow path 19 is narrowed in the vicinity of the second corner portion 15, the ventilation flow path 19 is narrowed after the filler 2 is injected. The thickness of the filler 2 that has flowed into the portion 20 is reduced, the air vent 16 can be bent upward, and the filler 2 is prevented from leaking to the outside through the air vent 16. Can be done. Further, since the air bleeding portion 16 can be bent upward, the operator can easily cut the air bleeding portion 16 using a cutting tool such as scissors after the filler 2 is cured, and the filler 2 can be bent. It is possible to facilitate the cutting work of the air bleeding portion 16 after the curing is performed, and reduce the labor of the cutting work.

(4) Further, the variable pad bag of the present embodiment is characterized in that the portion 20 in which the air flow path 19 of the air vent portion 16 is narrowed is due to welding 20a.

According to such a configuration, the portion 20 in which the air flow path 19 of the air vent portion 16 is narrowed is due to the welding 20a. Therefore, after the filler 2 is injected into the variable pad bag 1, the air vent portion 16 The thickness of the vicinity of the portion 20 where the ventilation flow path 19 is narrowed is thin due to welding, and the cutting work of the air bleeding portion 16 after the filler 2 is cured can be performed without using a special cutting tool, such as scissors. It can be easily cut using the cutting tool of.

(5) Further, the variable pad bag of the present embodiment is interposed between the bottom surface 7 of the rail 6 and the tie plate 8, and is used to adjust the height of the rail 6 according to the filling amount of the filler 2. A variable pad bag 1 formed by welding the peripheral edges 11 of two sheets of the variable pad 3 made of resin.
Approximately rectangular bag body 12 and
A flat tubular injection port 14 connected to a predetermined first corner 13 of the bag body 12 and
A flat tubular air bleeding portion 16 that is connected to the first corner portion 13 of the bag body 12 and the second corner portion 15 that is diagonally opposite to the first corner portion 13 is provided.
The air bleeding portion 16 is a bag for a variable pad having a portion 22 extending from the second corner portion 16 toward the third corner portion 21 adjacent to the second corner portion 16.

According to such a configuration, since the air vent portion 16 has a portion 22 extending from the second corner portion 15 toward the third corner portion 21 adjacent to the second corner portion 15, the filler 2 is injected. Later, the portion 22 extending toward the third corner portion 21 of the air bleeding portion 16 can be bent upward and hooked to the lower flange of the rail 6, and the filler 2 leaks to the outside via the air bleeding portion 16. It is possible to prevent this from happening. Further, since the portion 22 of the air bleeding portion 16 extending toward the third corner portion 21 can be bent upward, the operator can use a cutting tool such as scissors to bend the air bleeding portion 16 after the filler 2 is cured. The cutting work can be easily performed, the cutting work of the air bleeding portion 16 after the filler 2 is cured can be facilitated, and the labor of the cutting work can be reduced.

(6) Further, the variable pad bag of the present embodiment is interposed between the bottom surface 7 of the rail 6 and the tie plate 8, and is used to adjust the height of the rail 6 according to the filling amount of the filler 2. A variable pad bag 1 formed by welding the peripheral edges 11 of two sheets of the variable pad 3 made of resin.
Approximately rectangular bag body 12 and
A flat tubular injection port 14 connected to a predetermined first corner 13 of the bag body 12 and
A flat tubular air bleeding portion 16 that is connected to the first corner portion 13 of the bag body 12 and the second corner portion 15 that is diagonally opposite to the first corner portion 13 is provided.
The injection port portion 14 has a portion 18 in which the injection flow path 17 of the filler 2 is narrowed in the vicinity of the first corner portion 13.
The air vent 16
A portion 20 in which the air ventilation flow path 19 is narrowed in the vicinity of the second corner portion 15 and
The variable pad bag is characterized by having a portion 22 extending from the second corner portion 15 toward the third corner portion 21 adjacent to the second corner portion 15.

According to such a configuration, since the injection port portion 14 has a portion 18 in which the injection flow path 14 of the filler 2 is narrowed in the vicinity of the first corner portion 13, the injection flow path after the filler 2 is injected. The thickness of the filler 2 that has flowed into the portion 18 where 17 is narrowed becomes thin, the injection port 14 can be bent upward, and the filler 2 leaks to the outside through the injection port 14. Can be prevented. Further, since the air vent portion 16 has a portion 20 in which the air ventilation flow path 19 is narrowed in the vicinity of the second corner portion 13, the air vent passage portion 19 flows into the narrow portion after the filler 2 is injected. The thickness of the filler 2 is reduced, the air vent 16 can be bent upward, and the filler 2 can be prevented from leaking to the outside through the air vent 16. Further, since the air bleeding portion 16 has a portion 22 extending from the second corner portion 13 toward the third corner portion 21 adjacent to the second corner portion 15, the air bleeding portion 16 has a portion 22 after the filler 2 is injected. The portion 22 extending toward the three corner portions 21 can be bent upward and hooked to the lower flange of the rail 6 to prevent the filler 2 from leaking to the outside through the air vent portion 16. be able to.

Since the inlet portion 14 and the air vent portion 16 can be bent upward in this way, the operator can easily use a cutting tool such as scissors to cut the inlet portion 14 and the air vent portion 16 after the filler 2 is cured. The cutting work can be performed, and the cutting work of the injection port portion 14 and the air bleeding portion 16 after the filler 2 is cured can be facilitated, and the labor of the cutting work can be reduced.

The present invention can be implemented in various other forms without departing from its spirit or key features. Therefore, the above-described embodiment is merely an example in all respects, and the scope of the present invention is shown in the claims and is not bound by the text of the specification. Furthermore, all modifications and modifications that fall within the scope of the claims are within the scope of the present invention.

1 Variable pad bag 2 Filler 3 Variable pad 5 Rail fastening part 6 Rail 7 Bottom surface 8 Type rate 10 Track slab 11 Peripheral part 12 Bag body 13 First corner part 14 Injection port part 15 Second corner part 16 Air vent 17 Injection flow path 18 Part 19 Ventilation flow path 20 Part 21 Third corner 22 Part 23 Insulation plate 24 Anchor bolt 25 Nut 26 Embedded plug collar 28 Cover plate 33 Track pad 42 Leaf spring 46 Protrusion wall 50 Metal plate 51 Rubber Board

Claims

By welding the peripheral edges of two sheets of resin of a variable pad that is interposed between the bottom of the rail and the tie plate and is used to adjust the height of the rail according to the filling amount of the filler. A formed variable pad bag,
Approximately rectangular bag body and
A flat tubular injection port connected to a predetermined first corner of the bag body, and
A flat tubular air vent portion connected to the second corner portion diagonally opposite to the first corner portion of the bag body is provided.
The variable pad bag is characterized in that the injection port portion has a portion in the vicinity of the first corner portion where the injection flow path of the filler is narrowed.
The variable pad bag according to claim 1, wherein the portion of the injection port portion where the injection flow path is narrowed is due to welding.
By welding the peripheral edges of two sheets of resin of a variable pad that is interposed between the bottom of the rail and the tie plate and is used to adjust the height of the rail according to the filling amount of the filler. A formed variable pad bag,
Approximately rectangular bag body and
A flat tubular injection port connected to a predetermined first corner of the bag body, and
A flat tubular air vent portion that is diagonally connected to the second corner portion on the opposite side of the first corner portion of the bag body is provided.
The variable pad bag is characterized in that the air vent portion has a portion in the vicinity of the second corner portion where the air ventilation flow path is narrowed.
The variable pad bag according to claim 3, wherein the portion of the air vent portion where the air flow path is narrowed is due to welding.
By welding the peripheral edges of two sheets of resin of a variable pad that is interposed between the bottom of the rail and the tie plate and is used to adjust the height of the rail according to the filling amount of the filler. A formed variable pad bag,
Approximately rectangular bag body and
A flat tubular injection port connected to a predetermined first corner of the bag body, and
A flat tubular air vent portion connected to the second corner portion diagonally opposite to the first corner portion of the bag body is provided.
The variable pad bag, wherein the air bleeding portion has a portion extending from the second corner portion toward the third corner portion adjacent to the second corner portion.
By welding the peripheral edges of two sheets of resin of a variable pad that is interposed between the bottom of the rail and the tie plate and is used to adjust the height of the rail according to the filling amount of the filler. A formed variable pad bag,
Approximately rectangular bag body and
A flat tubular injection port connected to a predetermined first corner of the bag body, and
A flat tubular air vent portion connected to the second corner portion diagonally opposite to the first corner portion of the bag body is provided.
The injection port portion has a portion in the vicinity of the first corner portion where the injection flow path of the filler is narrowed.
The air vent is
A portion where the air flow path is narrowed near the second corner, and
A bag for a variable pad having a portion extending from the second corner portion in a direction toward a third corner portion adjacent to the second corner portion.