JP2012180633A - Variable pad, rail height adjustment method, and resin feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable pad which allows nozzle attachment/detachment operation to/from an inlet or resin injection operation to be easily performed.SOLUTION: A resin injection type variable pad 38 which is installed between a tie plate 14 and a rail bottom face 36A together with a track pad 40, and allows the height of a rail 36 on the track pad 40 to be adjusted by the injection amount of a resin fed from a resin feed nozzle 84 comprises: a flat flexible bag body; a tongue-shaped part 56 extending from the bag body to a position not overlapping with the rail bottom face 36A in a plan view for injecting a resin; a resin injection tube 60 which has an upper end projecting upward from the tongue-shaped part 56 so as to be connected with the resin feed nozzle 84 from above, and a lower end communicating with inside of the bag body through the tongue-shaped part 56; and a check valve 62 which is installed to the resin injection tube 60 and prevents the resin fed to the bag body from reverse flowing.

Description

  The present invention relates to a resin injection type variable pad interposed with a track pad between a rail bottom surface and a tie plate, a rail height adjusting method using the pad, and a resin supply device used directly for carrying out the method It is about.

  When the rail is fastened to the track slab or the PC sleeper, the tie plate is fixed to the track slab or the PC sleeper, the rail is placed on the tie plate with the variable pad and the track pad interposed therebetween, and the rail is held.

  Here, the variable pad is a flat and flexible bag body, which is usually a pair of upper and lower parts of a predetermined shape, such as laminated sheets of flat polyethylene, polypropylene, EVA (polyethylene vinyl acetate), nylon, etc. Sheets are cut out and the edges of these upper and lower sheets are bonded (welded) to form a flat and flexible bag. The height of the rail surface is adjusted by injecting resin into this and adjusting the injection amount of the resin. This resin is usually a two-component mixed type, in which the main agent and the curing agent are mixed immediately before injection, poured into a bag, and then cured.

  The track pad is placed on the variable pad, and a rubber plate is bonded to the lower surface of a metal plate such as a stainless steel plate. This rubber absorbs the impact of the rail. Further, the metal plate makes the rail easy to slide when the rail contacting the upper surface of the metal plate expands or contracts due to a temperature change or the like.

JP 2006-28857 A JP 2005-282112 A

  In Patent Documents 1 and 2, a check valve is attached to an injection port (a resin injection tongue) provided in the variable pad, and the injected resin flows back from the injection port and leaks out (drip). What prevents it is shown. Here, the injection port protrudes substantially horizontally on the same plane as the flat variable pad, and the tip of the protrusion is opened, while a check valve is fixed in the injection port. And the liquid mixture which mixed the resin base agent and hardening | curing agent which a resin pump discharges is inject | poured from the nozzle (resin supply nozzle) connected to the injection port.

  In those disclosed in Patent Documents 1 and 2, the resin is injected after connecting the nozzle of the pump to the injection port, and after filling the resin, the nozzle is removed from the injection port and connected to the injection port of the next variable pad Similarly, the resin is sequentially filled.

  Since the inlet is open horizontally here, it is necessary to insert the nozzle horizontally into the inlet along the upper surface of the track slab or PC sleeper. Each must be fixed. In addition, it may be necessary to hold the nozzle at the inlet so that the nozzle does not come out during the resin filling. Further, when the nozzle is pulled out from the injection port after filling with the resin, it is necessary to hold the injection port and the nozzle separately with both hands and pull them away.

  Thus, when inserting, extracting, or injecting nozzles by one worker, it is necessary to grasp the inlet and nozzle separately and apply force in the direction close to each other during injection and in the reverse direction when extracting. There is a problem that it is difficult to communicate and difficult to work. Also, when the resin supply nozzle is pulled out from the inlet of the variable pad when the resin injection is completed, the injection port is horizontal, so even if there is a check valve, some resin spills from the tip of the injection port to the surroundings, so-called liquid No one can avoid the phenomenon.

  On the other hand, since such an operation needs to be performed with the operator in the middle, the workability is poor and the physical burden on the operator is large. In particular, rail height adjustment (height correction), which is performed during regular maintenance of rails, requires not only adjustment of rails with long planned distances during midnight and other times when the vehicle does not travel, but also climatic conditions. Since it may be severe, it will be more severe work for the operator.

  The present invention has been made in view of such circumstances, and can facilitate the operation of inserting or removing (inserting) the nozzle into the injection port and pressing the nozzle during resin injection. The first object is to provide a variable pad suitable for improving work efficiency by reducing the physical burden on the operator by preventing the dripping of resin from the injection port when the nozzle is removed from the injection port. Objective. It is a second object of the present invention to provide a rail height adjustment method using this variable pad. It is a third object of the present invention to provide a resin supply apparatus that is directly used for carrying out this method.

  According to the present invention, the first object is mounted together with the track pad between the tie plate and the rail bottom surface, and the rail height on the track pad can be adjusted by the injection amount of resin supplied from the resin supply nozzle. In the resin injection type variable pad, a flat and flexible bag body, a tongue portion for resin injection extending from the bag body to a position not overlapping the rail bottom surface in a plan view, and an upper end of the tongue shape A resin injection tube that protrudes upward from the portion and has the resin supply nozzle connectable from above, and a lower end that communicates with the bag body through the tongue-shaped portion, and a resin injection tube provided in the resin injection tube to the bag body This is achieved by a variable pad having a check valve for preventing a back flow of the supplied resin.

A second object is a rail height adjusting method using the variable pad according to claim 1,
a) Hold the variable pad with the track pad between the rail bottom and the tie plate,
b) A resin supply nozzle is inserted from above into a resin injection tube that stands up from the tongue of the variable pad, and is detachably connected.
c) Start supplying resin after connecting the resin supply nozzle,
d) After the resin injection is completed, the resin supply is stopped and the resin supply nozzle is removed from the resin injection tube.
Rail height adjustment method characterized by having the above steps,
Is achieved.

  A third object is a resin supply device used in the rail height adjustment method according to claim 8, wherein the carriage is movable on the rail, and the resin main agent and curing agent storage tank placed on the carriage are provided. A resin supply pump that is mounted on the carriage and supplies a main agent and a curing agent of the storage tank to a resin supply nozzle, and the resin supply nozzle can be inserted into a resin injection pipe of a variable pad from above. This is achieved by a resin supply device.

  According to the first aspect of the present invention, the resin injection tube projecting substantially vertically from the resin injection tongue provided on the variable pad is provided, and the resin supply nozzle is detachably connected to the upper end of the resin injection tube from above. Therefore, the operator can hold the nozzle with one hand and press the resin injection tube from above to connect it. At this time, since the lower end of the resin injection pipe is supported by a track slab or a sleeper located below the tongue-like portion of the bag body, the operator can efficiently press the nozzle against the upper end of the resin injection pipe. It will be transmitted to the tube and work will be easier.

  Further, during the injection of the resin, it is possible to prevent the resin from leaking by holding the resin supply nozzle downward on the resin injection tube with one hand as necessary. Further, since the resin injection tube is opened upward, there is no risk of the resin leaking out from the resin injection tube when the nozzle is pulled out, and dripping can be prevented. Furthermore, since the work on the middle waist is reduced, the physical burden on the operator is reduced, and the work efficiency can be improved. According to the second invention (Embodiment 8), a rail height adjusting method using this variable pad is obtained. Furthermore, according to the third aspect of the present invention (invention 13), a resin supply apparatus that is directly used for carrying out this rail height adjusting method is obtained.

Sectional drawing which shows an example of the rail fastening apparatus to which one Example of this invention is applied, Similarly, a plan view, Conceptual diagram of resin filling work Side sectional view of an injection gun for resin filling Similarly front view of injection gun Side sectional view showing a state where the injection gun is inserted into the resin injection tube of the variable pad Side sectional view of resin injection pipe and check valve (A, B) and bottom view of check valve (C) Flow chart of operation Side view (A) and bottom view (B) showing another embodiment of the resin injection tube XX sectional drawing in FIG.9 (B) Plan view (A) and side sectional view (B) of valve body Side view showing one embodiment of resin supply device Conceptual diagram showing another embodiment of resin filling operation Side sectional view (A) and bottom view (B) of mixer section with resin filling nozzle closed XV-XV sectional view in FIG. Partial side sectional view of the mixer section with the resin filling nozzle in the open position Side view (A) and bottom view (B) of resin injection tube XVIII-XVIII sectional view in FIG.

  The resin injection pipe is sealed to the tongue so as to extend upward through the upper surface of the resin injection tongue, and the check valve is located between the bottom of the resin injection pipe and the inner bottom of the tongue. (Claim 2). In this case, since the tip of the tongue-shaped portion normally extends to the tip side of the resin injection tube, for example, the operator steps on the extended tip portion with the shoe sole and the upper surface of the track slab or the sleeper tree. It becomes possible to hold down between the two, and by positioning the resin injection tube, a more stable operation becomes possible.

  That is, since the resin injection tube protrudes upward from the tongue-shaped portion, the tongue-shaped portion spreads (widens) and extends on the distal end side of the resin injection tube or its periphery. It can be fixed similarly. In addition, when the nozzle is pulled out from the resin injection tube after the resin is injected, it is possible to work with one hand by holding the periphery of the tongue-like portion and the tip portion with the shoe sole, and the workability is good.

  In order to step and fix the tip of the tongue-like part with a shoe sole or the like in this way, the tip of the tongue-like part is extended sufficiently long from the resin injection tube to the tip side, and this part (stepping fixing end) It is good to make it easy to fix by stepping on (part 3). In this case, workability is further improved.

  The resin injection pipe includes an upper pipe portion that stands up through an upper surface sheet of a tongue-shaped portion, and a lower pipe portion that is fitted to the lower portion thereof from below and has a flange portion formed at a lower end thereof. A valve plate for opening and closing the upper pipe portion that faces the lower end opening of the upper pipe portion from below can be formed.

The resin injection pipe includes a pipe portion that stands up through an opening provided on the upper surface of the tongue-shaped portion, and a diameter-expanded portion that is formed at the lower end of the pipe portion and opens downward and in the radial direction, It can also be set as the structure by which the valve body which comprises a non-return valve was loaded in the part (Claim 5). In this case, since the enlarged diameter portion presses the lower surface of the tongue-shaped portion against the upper surface of the track slab or the sleeper, the holding and positioning of the tongue-shaped portion are stabilized, and the work efficiency can be increased.

  The valve body is formed of a closed cell foamed resin that elastically contacts the lower end opening of the pipe portion, and a check valve can be configured by loading this into the enlarged diameter portion. For example, a material having elasticity such as foamed polyethylene or rubber sponge and having a solvent resistance (resin resistance) is suitable. If the upper surface (the surface that elastically contacts the lower end opening of the pipe part) is processed into a sheet with moderate rigidity, or another similar member (metal film or plastic sheet) is pasted, the resin pump Is effectively applied to the upper surface of the valve body, and the function as a valve is improved. In this case, since the bottom surface of the foamed resin can be held against the inner bottom surface of the tongue-like portion, the valve structure is simple, and the manufacturing is simple and inexpensive.

  The valve body can be formed of a resin or metal thin plate that elastically contacts the lower end opening of the pipe portion (Claim 7). Here, the resin thin plate is preferably made of polyethylene or polypropylene. In this case, by appropriately setting the elasticity and shape of the resin thin plate, the mobility of the valve body is improved and the valve function is further improved. Can be made.

  In the second invention, when the resin supply nozzle is pulled out of the resin injection tube in step d), the tongue-shaped portion is fixed by, for example, stepping on the operator's shoes or pressing it with a bar-shaped pressing tool prepared separately. However, in order to make it easy to step on with shoes, it is preferable that the tip of the tongue-like part protrudes ahead of the resin injection tube, and this is used as a stepping fixing end. (Claim 10).

    The resin supplied in step c) is a mixed liquid in which the main liquid and its curing agent are mixed. The resin supply nozzle has a nozzle member that can be inserted / removed at the tip of the resin injection tube, and one end of the resin supply nozzle. It is desirable to have a static mixer that mixes the main agent and the curing agent that are connected and supplied from the other end, and an on-off valve that is provided between the static mixer and the nozzle member and intermittently supplies resin. 11). In this case, the resin can be prevented from spilling from the nozzle by closing the check valve when the nozzle is removed from the resin injection tube of the variable pad.

  In FIG. 1, reference numeral 10 denotes a track slab. The track slab 10 is a PC (Prestressed concrete) plate having a length of several meters in the rail length direction, and is positioned and laid on the roadbed. An embedded stopper collar 12 is embedded in the slab 10 at a predetermined position.

  In the figure, reference numeral 14 denotes an iron tie plate, which is positioned and placed on the slab 10 with an insulating plate 16 such as a rubber mat interposed therebetween. The tie plate 14 is fixed to the slab 10 by anchor T-bolts 18 and nuts 20.

The T-bolt 18 has a T-shaped bolt head 18a at the lower end. The embedding plug collar 12 has a substantially circular cross section so that the bolt head 18a can pass through. The bolt head 18a is inserted into the embedding plug collar 12 from above and rotated by 90 ° so that the bolt head 18a is inserted into the embedding plug collar. 12 is engaged with an engagement portion 12a provided at the bottom of the frame.

  Here, the T-bolt 18 and the tie plate 14 are electrically insulated by an insulating collar 22. The insulating collar 22 has a cylindrical boss portion and a flange portion that expands from the upper end of the boss portion 24 in the outer diameter direction. The insulating collar 22 is manufactured, for example, by injection molding a polycarbonate resin mixed with about 8% by weight of short glass fibers.

As shown in FIG. 1, the insulating plate 16 and the tie plate 14 are passed through the T bolt 18, and further, an iron cover plate 28, an insulating collar 22, a washer 30, a spring washer 32, and a washer 34 are passed. Finally, the nut 20 is screwed and tightened. Here, the boss portion of the insulating collar 22 enters the bolt hole of the cover plate 28 and the tie plate 14. In this way, the tie plate 14 and the T-bolt 18 are electrically insulated by the insulating collar 22.

  In FIG. 1, reference numeral 36 denotes a rail, which is placed on the tie plate 14 through a resin injection type variable pad 38 and a track pad 40 for adjusting the rail height. The leaf spring 42 that holds the rail 36 is fastened and fixed to the tie plate 14 by bolts 44 and nuts 46.

Here, the tie plate 14 is integrally formed with projecting walls 48 and 48 for guiding the rail bottom portion. These projecting walls 48, 48 stand with an interval substantially matching the width of the bottom 36 </ b> A of the rail 36. The variable pad 38 and the track pad 40 are laid between the projecting walls 48, 48, and the bottom 36A of the rail 36 is placed thereon. The rail 36 is restricted from moving in the left-right direction (width direction) by both projecting walls 48, 48.

  The projecting walls 48, 48 are formed with notches 50, 50 extending downward in the transverse direction, and a bolt head (not shown) formed in a substantially trapezoidal shape of the bolt 44 is engaged therewith. Match.

  The track pad 40 has a metal plate 52 made of a stainless steel plate and a rubber plate 54 bonded to the lower surface of the metal plate 52. The metal plate 52 has a length substantially equal to the length of the tie plate 14 in the rail longitudinal direction.

  Next, the variable pad 38 will be described. The variable pad 38 is obtained by injecting a resin into a resin bag body and curing it. This bag is flat as shown in FIG. 3, and a pair of upper and lower sheets of a predetermined shape is cut out from a laminate of sheets of polyethylene, polypropylene, EVA, nylon, etc., and the peripheral edges of these upper and lower sheets are bonded ( It is made into a flat and flexible bag shape by welding.

  As shown in FIGS. 2 and 3, the variable pad 38 is longer in the rail longitudinal direction than the size of the space between the projecting walls 48 of the tie plate 14. And a tongue portion 58 for venting air. The tongue 56 extends obliquely to the side of the bottom 36A of the rail 36, and the tongue 58 extends below the rail bottom 36A and extends in parallel with the rail 36. A resin injection tube 60 and a check valve (one-way valve) 62, which will be described later, are mounted on the tongue 56 for resin injection (see FIG. 6). The check valve 62 allows the resin to be injected while preventing the resin from flowing back.

  The track pad 40 is overlaid on the variable pad 38. At this time, both ends of the variable pad 38 protrude in the length direction of the rail 10 from the track pad 40 and the tie plate 14. In a state where the variable pad 38 is filled with resin, both ends of the variable pad 38 swell up and down to engage with the end edges of the track pad 40 and the tie plate 14, and the movement of the variable pad 38 is restricted and positioned accurately.

  The height of the rail 36 is adjusted with the rail 36 placed on the track pad 40, and the spacer 63 is inserted below the rail 36 at a predetermined height to maintain the height. In this state, the variable pad 38 is filled with resin to fill a gap formed between the rail 36 and the tie plate 14. Then, after the resin is cured, the spacer 63 is removed.

  In this operation, resin is injected from the resin-injecting tongue 56 with the air release tongue 58 of the variable pad 38 open, and the air-release tongue 58 is closed in the air-released state. This is done by controlling the injection amount. This resin injection is performed by a resin supply device 74 (FIG. 3) which will be described later, and the rail height is appropriately maintained depending on the amount of resin to be filled. Since the check valve 62 is mounted on the tongue 56, the resin does not flow backward. The resin hardens after a predetermined time.

  Next, the resin injection pipe 60 and the check valve 62 will be described. As shown in FIGS. 6 and 7, the resin injection pipe 60 includes an upper pipe portion 61 and a lower pipe portion 64 fitted to the upper pipe portion 61 from below. The check valve 62 includes a thin plate-like valve body 66 integrally formed near the middle of the lower pipe portion 64, and a flange portion 68 formed at the lower portion of the lower pipe portion 64. A lower end opening of the upper pipe portion 61 faces the valve body 66 and is opened and closed by the valve body 66. The lower pipe part 64 stands up through the sheet 56A (FIG. 6) on the upper surface of the tongue-like part 56. The sheet 56A is thermocompression bonded (welded) or bonded to the upper surface of the flange portion 68 in a liquid-tight manner.

  As shown in FIGS. 7B and 7C, four resin flow paths 70 formed of grooves extending in the radial direction are formed on the lower surface of the flange portion 68. The passage 70 forms a resin passage that opens in the radial direction between the lower surface of the tongue 56 and the sheet 56B. If the lower surface of the flange portion 68 is thermocompression-bonded or bonded to the sheet 56B below the tongue-shaped portion 56, the resin injection tube 60 does not float from the lower sheet 56B, and the resin injection is further stabilized.

  In this embodiment, the valve body 66 is formed integrally with the lower pipe portion 64. However, the valve body 66 may be formed of a closed cell foam resin that elastically contacts the lower end opening of the upper pipe portion 61 instead of the valve body 66. Good. This valve body will be described in Embodiment 5 with reference to FIGS.

  Next, the resin supply device 74 will be described with reference to FIG. The resin supply device 74 includes an airtight tank (accommodating tank) 76 that accommodates the main agent, an airtight tank (accommodating tank) 78 that accommodates the curing agent, and supplies air pressure to the tanks 76 and 78 to supply the main agent and the curing agent. An air pump (resin supply pump) 80 for feeding, a resin injection gun 82 for injecting the sent resin into the bag body, and a controller (not shown) for driving the pump 80 are provided.

  The resin injection gun 82 includes a nozzle member 84 as a resin supply nozzle that can be inserted and removed from the tip of the resin injection tube 60 (FIG. 6), and the main agent supplied to the nozzle member 84 from one end. A static mixer 86 for mixing the curing agent (see FIG. 4; only the accommodating portion of the static mixer 86 is shown in FIG. 4), and the resin contained in the nozzle member 84 on the outlet side of the static mixer 86. And an on-off valve 88 for intermittently supplying

  As shown in FIGS. 4 and 6, the on-off valve 88 has a valve body 90 whose upper part is enlarged in an inverted conical shape and whose lower part is a cross-shaped guide as viewed from below, and the valve body 90 is pushed downward. Spring 92. The on-off valve 88 opens and closes when the inverted conical surface at the top of the valve body 90 abuts / separates from the valve seat surface formed by the conical surface formed on the inner surface of the nozzle member 84.

  Here, the upper end of the resin injection pipe 60 hits the lower end of the valve body 90 when the nozzle member 84 is connected to the resin injection pipe 60, and the valve body 90 is pushed up. As a result, the on-off valve 88 is opened. When the injection gun 82 is removed from the resin injection tube 60, the valve body 90 is pushed down by the spring 92, so that the on-off valve 88 is automatically closed.

  The resin injection gun 82 is provided with a grip portion 94 (FIGS. 3 and 4), and an operator works by holding the grip portion 94 by hand. A Y-shaped connecting pipe 98 (FIGS. 3 and 5) is connected to the other end side of the static mixer 86 via a manual switch 96. The main agent delivered from the resin supply device 74 is connected to the connecting pipe 98. And the hardener is led. Accordingly, the main agent and the curing agent enter the static mixer 86 through the connecting pipe 98, where they are mixed and guided to the on-off valve 88.

  Next, the construction procedure using this embodiment will be described with reference to FIG. First, the track pad 40 is overlaid on the variable pad 38 and inserted between the bottom 36A of the rail 36 and the tie plate 14 (step S100). The variable pad 38 has a surface 56A on which the resin injection tube 60 provided on the tongue 56 for resin injection protrudes upward (FIG. 6). That is, the resin injection tube 60 protrudes upward, and at this time, the lower surface 56B of the tongue-like portion 56 hits the track slab 10 and is supported from below.

  The insertion of the variable pad 38 and the track pad 40 is performed after adjusting the height of the rail 36 with a rail puller or the like and inserting the spacer 63 under the rail 36 at a predetermined height. The switch 96 is opened to prepare for injection (step S100).

  Next, a resin injection gun 82 is connected to the resin injection tube 60. Then, as shown in FIG. 4, the nozzle member 84 at the tip is positioned above the resin injection tube 60 and pushed downward, thereby causing the resin injection tube 60 to enter and connect to the nozzle member 84 (step S102). .

At this time, the on-off valve 88 is opened, and the main agent and the curing agent mixed by the static mixer 86 start to flow into the variable pad 38. That is, resin injection starts (step S104). The resin flows from the opening / closing valve 88 through the check valve 62 into the tongue 56 and the variable pad 38 (step S106).

  When the resin injection is completed, the nozzle member 84 of the resin injection gun 82 is removed from the resin injection tube 60 (step S108). Then, the on-off valve 88 of the resin injection gun 82 is automatically closed (step S110).

  If there is a next variable pad 38 for injecting resin, the operations in steps S102 to S110 are repeated to inject resin into the next variable pad 38, and if there is no next variable pad 38, the construction is finished (step S112). Since the check valve 62 is integrally provided in the resin injection pipe 60 and the on / off valve 88 is provided in the nozzle member 84, the resin therein flows backward from the variable pad 38 when the resin injection pipe 60 is pulled out. The resin does not leak and the resin does not leak out from the tip of the nozzle member 84 of the resin injection gun 82.

  Next, the check valve 62A provided in the resin injection pipe 60A shown in FIGS. The check valve 62A is a plate-like valve body 66 in the check valve 62 of the resin injection pipe 60 of the first embodiment, which is formed of a resin thin plate that elastically contacts the lower end opening of the pipe portion 64A. Here, the resin thin plate that becomes the valve body 66A has a generally inverted saddle shape that protrudes upward, and is engaged with four base portions 68B formed on the lower surface of the flange portion 68A whose diameter is increased at four locations on the periphery. . A resin passage 70A that opens in the radial direction from the flange portion 68A is formed between the four base portions 68B.

According to this embodiment, by appropriately setting the elasticity and shape of the valve body 66A made of a thin resin plate, the mobility of the valve body 66A can be improved and the function of the valve can be further improved.
In FIG. 9B, hatching is given to clarify the mounting state of the valve body 66A.

  In the present invention, the nozzle member 84 that is a resin injection nozzle for injecting resin is inserted into the resin injection pipes 60 and 60A provided on the variable pad 38 from above and pulled out upward. At this time, the resin injection pipe of the variable pad 38 It is desirable to fix 60. In the above embodiment, the tongue 56 is fixed by stepping on the shoe sole or the like, but it may be difficult to fix depending on the shape of the shoe sole.

  Therefore, in this embodiment, the tongue-like portion 56 is extended to the tip side from the resin injection tube, and this is used as a stepping and fixing end portion 56A (FIGS. 2 and 3). When attaching / detaching the resin supply nozzle (nozzle member) 84 to / from the resin injection tube 60, the operator can firmly press the stepping fixing end portion 56A with the shoe sole to firmly fix the tongue-like portion 56, Workability is improved. Instead of fixing the tongue-like portion 56 with shoes, another stick-like pressing tool (not shown) may be prepared.

  In Example 4 shown in FIG. 12, a resin supply device 74 similar to the resin supply device 74 of Example 1 shown in FIG. 3 is mounted on a carriage 100 that can move on the rail 36. That is, similar to the resin supply device 74 shown in FIG. 3, the carriage 100 includes an airtight tank 76A for containing the main agent, an airtight tank 78 for containing the curing agent, a pump 80, and a control unit (not shown). ). In this embodiment, the carriage 100 is further loaded with a seat (chair) 102 for the worker, so that the worker can work while riding on the carriage.

  Here, the seat 102 is arranged so that an operator looks down on the rail 36 from above from the front end or the rear end of the carriage 100, and the operator stabilizes his posture by placing his feet on the footrest 104 provided below the seat 102. Then, the user sits on the seat 102. An operator performs the injection operation by grasping the resin injection gun 82 while sitting here. That is, the variable pad 38 is inserted in advance between the tie plate 14 placed on the track slab 10 by another worker and the bottom portion 36 </ b> A of the rail 36, and the worker on the carriage moves the nozzle at the tip of the resin injection gun 82. The member 84 is pressed against the resin injection tube 60 of the variable pad 38 to connect them. At this time, the on-off valve 88 hits the tip of the resin injection pipe 60 of the variable pad 38, and the on-off valve 88 is opened (see FIG. 6).

  If the manual switch 96 is opened by operating the manual lever 96A in advance, the main agent and the curing agent flow into the gun 82 and are mixed by the static mixer 86, and the resin is further provided in the resin injection pipe 60 of the variable pad 38. A check valve 62 is pushed open and flows into the variable pad 38.

  When the resin injection is completed, the nozzle member 84 at the tip of the gun 82 is removed from the resin injection tube 60 of the variable pad 38, and the operation of the next variable pad 38 is started. At this time, since the on-off valve 88 is automatically closed even if the manual switch 96 is not closed, the manual switch 96 need not be closed. According to this embodiment, since the cart 100 can be moved and the resin can be sequentially injected into the variable pad 38 set in advance under the rail, the working efficiency is remarkably improved.

  Next, another embodiment of the resin injection gun 82 will be described with reference to FIGS. The resin injection gun 82B is for injecting the main agent and the curing agent supplied from the same apparatus as the resin filling apparatus 74 shown in FIG. A resin injection pipe 60B and a check valve 62B are attached to the variable pad 38 used here.

  As shown in FIGS. 15 and 17 to 18, the resin injection tube 60 B includes a cylindrical pipe member 64 B having upper and lower ends opened, and a diameter-increased portion 66 B formed in the lower portion and opened downward and in the circumferential direction (horizontal direction). And have. A valve body 68B serving as a check valve 62B is loaded in the enlarged diameter portion 66B. The pipe member 64 </ b> B stands up through the sheet 56 </ b> A (FIG. 15) on the upper surface of the tongue-like portion 56. The sheet 56A is thermocompression bonded (welded) or bonded to the outer upper surface (shoulder) of the enlarged diameter portion 66B outside the pipe portion 64B.

  As shown in FIG. 18, the periphery of the bottom of the enlarged diameter portion 66B expands horizontally in a flange shape, and this expanded bottom portion 70B abuts the sheet 56B (FIG. 15) on the lower surface from the inside of the tongue-shaped portion 56. As shown in FIGS. 17 and 18, four passages 72B extending in the radial direction are formed on the bottom surface of the enlarged bottom portion 70B. The passage 72B forms a resin passage that opens in the radial direction between the lower surface of the tongue 56 and the sheet 56B. The bottom portion 70B of the enlarged diameter portion 66B is preferably fixed to the sheet 56B on the lower surface of the tongue-like portion 56.

  In this embodiment, the valve body 68B is formed of a closed cell foamed resin that elastically contacts the lower end opening of the pipe portion 64B. The valve body 68B is an elastic material such as foamed polyethylene or rubber sponge, and a solvent resistant (resin resistant) material is suitable. If the upper surface (the surface that elastically contacts the lower end opening of the nozzle insertion pipe portion 64B) is processed into a sheet having an appropriate rigidity, or another similar member (metal film or plastic sheet) is pasted here. The pressure of the resin pump is efficiently applied to the upper surface of the valve body 68B, and the function as a valve is improved. In this case, since the bottom surface of the foamed resin can be held against the inner bottom surface of the tongue-like portion 56B, the valve structure is simple, and the manufacturing is simple and inexpensive.

  The resin injection gun 82B includes a nozzle member 84B as a resin supply nozzle that can be inserted / removed at the tip of the pipe portion 64B of the resin injection pipe 60B, and the main agent supplied from the other end with one end connected to the nozzle member 84B. A static mixer 86B for mixing the curing agent (see FIGS. 13 and 14, only the accommodating portion of the static mixer 86B is shown in FIG. 14) and the static mixer 86B and the nozzle member 84B are provided. And an on-off valve 88B for intermittently supplying resin.

  As shown in FIGS. 14 to 16, the on-off valve 88B has a horizontal direction (open position, FIG. 7) and a downward direction (closed position, FIG. 4) in FIG. 4 on a valve holder 88C connected to the tip of the static mixer 86B. The nozzle member 84B is held so as to be rotatable between the two. The valve holder 88C is formed with a liquid passage 88D communicating with the nozzle member 84B when the nozzle member 84B is leveled. The liquid passage 88D is formed when the nozzle member 84B is directed downward (the static mixer 86B and the nozzle member 84B are connected). Communication with the nozzle member 84B is interrupted. Thus, the on-off valve 88B is opened and closed by rotating the nozzle member 84B in the horizontal direction and the downward direction.

  A T-shaped connecting pipe 98B (FIGS. 13 to 14) is connected to the other end of the static mixer 86B, and the resin discharged from the resin supply device 74 is guided to the connecting pipe 98B. Accordingly, the main agent and the curing agent enter the static mixer 86B through the connecting pipe 98B, where they are mixed and guided to the on-off valve 88B.

  Next, the construction procedure using this embodiment will be described. First, the track pad 40 is placed on the variable pad 38 and inserted between the bottom 36A of the rail 36 and the tie plate 14 (see step 100 in FIG. 8). The variable pad 38 has a surface 56A on which the pipe portion 64B of the resin injection tube 60B provided on the tongue portion 56 for resin injection protrudes upward. That is, the pipe portion 64B protrudes upward, and at this time, the lower surface 56B of the tongue-like portion 56 is supported by the track slab 10 from below.

  At this time, the height of the rail 36 is adjusted by a rail puller or the like, a spacer 64 (see FIG. 2) is inserted below the rail 36 at a predetermined height, and then the variable pad 38 and the track pad 40 are inserted. Instead of raising the rail 36 to a predetermined height in advance, the height of the rail 36 may be controlled by controlling the resin supply amount of the variable pad 38 and changing the thickness according to the pressure.

  Next, the resin supply nozzle 80 of the resin supply device 74 is connected to the pipe member 64B. At this time, the nozzle member 84B at the tip of the resin supply nozzle 80 is set to the closed position of the on-off valve 88B bent as shown in FIG. Then, the pipe member 64B of the resin injection pipe 60 is inserted and connected from above. The inner periphery of the opening above the pipe member 64B is processed into a taper shape so that the nozzle member 84B can be inserted smoothly. In this state, the static mixer 86B is raised upward to open the on-off valve 88B.

  When the resin injection is completed, the static mixer 86B is bent horizontally and the on-off valve 88B is closed. And the nozzle member 84B is extracted from the pipe part 64B. If there is a next variable pad 38, resin is injected into it, and if there is no next variable pad 38, the construction is completed. Since the nozzle member 84B has a check valve 62B and the resin supply gun 82B has an on-off valve 88B, when the nozzle member 84B is pulled out, the resin therein may flow backward from the variable pad 38 and lean out. In addition, the resin does not leak out from the tip (nozzle member 84B) of the resin supply gun 82B.

14 Tie plate 36 Rail 36A Rail bottom 38 Variable pad 40 Track pad 56 Tongue 56A for resin injection Treading fixing end 60, 60B Resin injection pipe 61 Upper pipe 64 Lower pipe 62, 62A, 62B Check valve 64 , 64B Pipe member (resin injection pipe)
66, 66A Valve body (valve plate)
74 Resin feeder 76 Main agent storage tank (airtight tank)
78 Hardener storage tank (airtight tank)
80, 80A air pump (resin supply pump)
82, 82B Resin injection gun 84, 84B Resin supply nozzle (nozzle member)
86, 86B Static mixer 88, 88B Open / close valve 96 Manual switch 100 Cart

Claims (13)

In a resin injection type variable pad that is mounted with a track pad between the tie plate and the rail bottom surface, and adjusts the rail height on the track pad by the amount of resin supplied from the resin supply nozzle,
A flat and flexible bag body, a tongue portion for injecting resin extending from the bag body to a position not overlapping the bottom surface of the rail in plan view, and an upper end protruding upward from the tongue portion and The resin supply nozzle is connectable from above, and the lower end of the resin injection pipe communicates with the bag body via the tongue-shaped portion, and the reverse is provided in the resin injection pipe to prevent the backflow of the resin supplied to the bag body. A variable pad comprising a stop valve.   The resin injection tube is sealed to the tongue so as to extend upward through the upper surface of the tongue, and the check valve is mounted between the bottom of the resin injection tube and the inner bottom of the tongue. The variable pad according to claim 1.   The variable pad according to claim 1, wherein the tongue-shaped portion is formed with a treading fixing end portion extending toward the tip side from the resin injection tube.   The resin injection pipe includes an upper pipe portion that stands up through an upper surface sheet of a tongue-shaped portion, and a lower pipe portion that is fitted to the lower portion thereof from below and has a flange portion formed at a lower end thereof. The variable pad according to claim 1, wherein a valve body is formed to face the lower end opening of the upper pipe portion from below and open and close the upper pipe portion.   The resin injection pipe includes a pipe portion that stands up through an opening provided on the upper surface of the tongue-shaped portion, and a diameter-expanded portion that is formed at the lower end of the pipe portion and opens downward and in the radial direction, The variable pad according to claim 1, wherein a valve body constituting a check valve is loaded in the part.   6. The variable pad according to claim 5, wherein the valve body is formed of a closed cell foamed resin that elastically contacts the lower end opening of the nozzle insertion tube portion.   The variable pad according to claim 4, wherein the valve body is formed of a thin plate made of resin or metal that elastically contacts the lower end opening of the nozzle insertion tube portion. A rail height adjustment method using the variable pad according to claim 1,
a) Hold the variable pad with the track pad between the rail bottom and the tie plate,
b) A resin supply nozzle is detachably connected from above to a resin injection tube rising from the tongue of the variable pad,
c) Start supplying resin after connecting the resin supply nozzle,
d) After the resin injection is completed, the resin supply is stopped and the resin supply nozzle is removed from the resin injection tube.
The rail height adjustment method characterized by having the above process.   9. The rail height adjusting method according to claim 8, wherein, in step d), the tongue-like portion is fixed and the resin supply nozzle is removed from the resin injection tube.   The rail height adjusting method according to claim 9, wherein the stepping fixing end provided at the tip of the tongue is fixed and the resin supply nozzle is removed from the resin injection tube.   9. The rail height adjustment according to claim 8, wherein the resin supply nozzle is provided with an on / off valve for intermittently supplying resin, and the resin supply nozzle is withdrawn from the resin injection pipe after the on / off valve is closed after resin injection in step d). Method.   The resin supplied by the resin supply pump in step c) is a mixed liquid in which the main liquid and its curing agent are mixed. The resin supply nozzle has a nozzle member that can be inserted into and removed from the tip of the resin injection tube, and one end of this resin. 9. A static mixer that is connected to a nozzle member and mixes the main agent and the curing agent supplied from the other end, and an on-off valve that is provided between the static mixer and the nozzle member and intermittently supplies resin. The rail height adjustment method described in 1.   9. A resin supply device for use in the rail height adjustment method according to claim 8, wherein the carriage is movable on the rail, the resin main agent and curing agent storage tanks on the carriage, and the carriage are placed on the carriage. A resin supply apparatus comprising: a resin supply pump that supplies a main agent and a curing agent of the storage tank to a resin supply nozzle; and the resin supply nozzle can be inserted into a resin injection pipe of a variable pad from above.

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