JP6259507B1 - Construction girder mounting device and construction girder mounting method - Google Patents

Abstract

There is provided a construction girder mounting device and a construction girder mounting method that do not require a roadbed work when installing and removing a construction girder and can maintain a track from outside the gauge while the construction girder is installed. A construction girder mounting device 1 includes an insert nut N2 that is embedded in a sleeper M from the upper surface of an existing sleeper M on the outside of a pair of rails R, and is fixed to the sleeper M. The construction girder 2 is supported so that at least a part of the construction girder 2 is located outside the end Ma of the upper surface of the sleeper M. A support member 3 including an overhanging portion 5 and a fastening bolt B2 attached to the insert nut N2 and fixing the support member 3 to the sleeper M by pushing the overlapping portion 4 toward the upper surface of the sleeper M. Prepare. [Selection] Figure 2

Description

  The present invention relates to a construction girder attaching device and a construction girder attaching method for attaching a construction girder to a sleeper laid on a roadbed.

In the crossing work under the track by the underpass method, etc., a simple construction girder will be installed for the purpose of suppressing the track settlement during the construction period. Patent Document 1 below discloses a reinforcing girder mounting device that attaches a construction girder called a reinforcing girder to a sleeper in order to reinforce a rail including a rail and a sleeper.
The reinforcing girder mounting device of Patent Document 1 includes a pair of support blocks arranged on the left and right sides of a reinforcing girder made of H-shaped steel, and a bridging piece spanned between the pair of support blocks so as to cover the upper part of the reinforcing girder. And a U-bolt buried in the road bed and a pair of nuts attached to a pair of upper ends of the U-bolt. The bridge piece is fastened to the sleeper by a U-bolt and a pair of nuts, whereby the reinforcing beam and the support block are connected to the sleeper.

  The U bolt includes a pair of side portions extending vertically and a bottom portion disposed between the lower ends of the pair of side portions. A pair of side parts of the U-bolt are arranged before and after the sleeper, and a bottom part of the U-bolt is arranged under the sleeper. When attaching a U-bolt to the sleeper, scrape the ballast to the bottom of the sleeper and dig a hole in the roadbed to place the U-bolt. And after arrange | positioning a U volt | bolt around a sleeper, the hole which has arrange | positioned the U volt | bolt is filled up with a ballast, and the buried part is squeezed.

Japanese Patent No. 3407011

  As described above, in the reinforcing girder mounting device of Patent Document 1, it is necessary to dig a ballast under the sleeper in order to bury the U-bolt in the roadbed. And after attaching a U-bolt to a sleeper, it is necessary to fill a hole with a ballast and to harden the filled part. Similarly, when removing a U-bolt, it is necessary to dig a roadbed to form a hole and fill the hole with ballast. Therefore, a roadbed work is required when installing and removing the reinforcing girders, which requires considerable labor.

  Furthermore, in the reinforcing girder mounting device of Patent Document 1, the entire reinforcing girder is disposed on the sleeper, and the interval between the reinforcing girder and the rail is narrow. If the distance between the reinforcing beam and the rail is narrow, a tie tamper that squeezes the roadbed is inserted between the two, and the track cannot be maintained from outside the gauge. According to the study by the present inventors, if the track cannot be maintained from outside the gauge, the height deviation (unevenness in the length direction of the top surface of the rail) and the level deviation (difference in the height of the left and right rails between the gauges) are corrected. Therefore, it is known that the maintenance work period for maintaining the track (maintenance period) is shortened.

  The present invention has been made under such a background, and there is no need for roadbed work when installing and removing the construction girders, and the construction girders can be maintained from outside the gauge with the construction girders installed. An object is to provide a mounting device and a construction girder mounting method.

  In order to achieve the above object, the invention according to claim 1 is a construction girder mounting device for attaching a construction girder to a sleeper laid on a road bed, outside a pair of rails fastened to the existing sleeper. Embedded from the upper surface of the sleeper, embedded in the sleeper and fixed to the existing sleeper, an overlapping portion placed on the existing sleeper, and from the end of the existing upper surface of the sleeper to the outside A support member including an overhang, and an overhang portion that supports the work beam so that at least a part of the work beam is positioned outside an end of the upper surface of the existing sleeper, and is attached to the embedded member, The fixing member for fixing the supporting member to the existing sleeper by pushing the overlapping portion toward the upper surface of the existing sleeper, and the construction girder supported by the overhanging portion in front And a work digits fastening device for fastening to the support member, a construction of digits mounting device.

  According to this configuration, the embedding member is embedded in the sleeper from the upper surface of the existing sleeper outside the pair of rails, and is fixed to the existing sleeper. Thereafter, the overlapping portion of the support member is placed on the sleeper, and the fixing member is attached to the embedded member. Thereby, the overlapping part of the support member is pushed toward the existing sleeper, and the support member is fixed to the existing sleeper. The construction girder is placed on the overhanging portion of the support member and fastened to the support member by the construction girder fastening device.

  Thus, the embedded member of the construction girder mounting device is not embedded in the roadbed, but is embedded in an existing sleeper. Therefore, unlike the prior art, it is not necessary to scrape the ballast to dig a hole in the roadbed or to fill the hole in the roadbed with the ballast. Therefore, it is possible to easily install and remove the construction girders, and to reduce the labor and time required to install and remove the construction girders. In addition, since no roadbed work is required when installing and removing construction girders, construction girders can be constructed even in summer.

  Furthermore, the construction girder is supported by a projecting portion of a support member that projects outward from the end of the upper surface of the existing sleeper. Part or all of the construction girder is arranged outside the upper edge of the existing sleeper. Therefore, compared with the prior art in which the entire construction girder is disposed on the existing sleeper, the distance between the construction girder and the rail is increased. Therefore, the tie tamper can be inserted between the two to maintain the track from outside the gauge. Thereby, the workability of track maintenance can be improved and the maintenance cycle can be lengthened.

  One of the embedded member and the fixed member is a nut, and the other of the embedded member and the fixed member is a bolt. The support member is fastened to the existing sleeper by the embedded member and the fixing member. Either the embedded member or the fixing member may be a nut. The sleeper may be a concrete sleeper such as a PC (prestressed concrete) sleeper, a synthetic resin sleeper, or a metal sleeper. It may be a wooden sleeper (normal sleeper).

The invention according to claim 2 is the construction girder mounting device according to claim 1, wherein the projecting portion includes a plurality of support portions that respectively support a plurality of construction girders. According to this configuration, a plurality of construction girders are fastened to the same support member. Thereby, the rail is reinforced with a plurality of construction girders, and the rigidity of the rail is increased. Therefore, the amount of deflection of the rail can be further reduced.
According to a third aspect of the present invention, the construction girder fastening device is pressed toward the construction girder by the presser bolt fixed to the support member and the presser bolt, and the construction girder is moved toward the support member. The construction girder mounting device according to claim 1, further comprising a pressing plate.

The female screw to which the male screw of the presser bolt is attached may be formed on the support member, or may be formed on a nut different from the support member. In the latter case, the nut may be fixed to the support member by any one of welding, press fitting, and caulking. In this case, when attaching the presser bolt to the nut, it is not necessary to hold the nut by hand.
According to this configuration, when the presser bolt is fixed to the support member, the construction beam is pressed toward the support member by the presser plate. Thereby, the construction girder is sandwiched between the presser plate and the support member and fixed to the support member. Thus, since the construction girder is fixed by being sandwiched between the presser plate and the support member, it is not necessary to form a through hole through which the bolt passes in the construction girder. Therefore, the shape of the construction girder can be simplified.

  Invention of Claim 4 is further equipped with the rubber plate arrange | positioned between the said overlapping part of the said supporting member, and the said existing sleeper, The construction girder as described in any one of Claims 1-3 It is a mounting device. According to this configuration, since the rubber plate is interposed between the support member and the sleeper, the sleeper is prevented from being scraped by the support member even if the sleeper is made of a brittle material such as concrete. it can.

  The invention according to claim 5 is provided through a support member including an overlapping portion disposed on a sleeper laid on a roadbed and an overhanging portion projecting outward from an end of an upper surface of the existing sleeper. A construction girder mounting method for attaching a construction girder to the sleeper, wherein an embedding hole extending downward from the upper surface of the existing sleeper is provided outside the pair of rails fastened to the existing sleeper. Forming a hole, inserting an embedded member into the embedded hole formed in the existing sleeper, and fixing the embedded member to the existing sleeper; and the support member The overlapping member is placed on the existing sleeper, a fixing member is attached to the embedding member, and the supporting member is pushed by pushing the overlapping member toward the upper surface of the existing sleeper with the fixing member. Said A support member attaching step for fixing to the ladle, and the construction beam on the overhanging portion of the support member so that at least a part of the construction beam is positioned outside the end of the upper surface of the existing sleeper. A construction girder attaching method including a construction girder attaching step of placing and fastening the construction girder to the support member. According to this configuration, the same operational effects as described above can be achieved.

It is a top view which shows the state in which four construction girders are attached to the plurality of sleepers laid on the roadbed by the construction girder mounting device. It is sectional drawing which shows the vertical cross section which follows the II-II line | wire shown in FIG. FIG. 2 is an enlarged view of a part of FIG. 1. It is a side view which shows the construction girder seen in the direction of arrow IV shown in FIG. It is sectional drawing which shows the state which has opened the hole which inserts an insert nut in the edge part of the existing sleeper. It is sectional drawing which shows the state which has inserted the insert nut into the edge part of the existing sleeper. It is sectional drawing which shows the state which fastens the supporting member to the existing sleeper. It is sectional drawing which shows the state which has laid the construction girder on the support member fastened by the existing sleeper. It is sectional drawing which shows the state which fastens the construction girder to the support member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the following description, the vertical direction and the front-rear direction mean a horizontal direction along the longitudinal direction of the rail R, and the horizontal direction and the left-right direction mean a horizontal direction orthogonal to the longitudinal direction of the rail R.
FIG. 1 is a plan view showing a state in which four construction girders 2 are attached to a plurality of sleepers M laid on a roadbed by a construction girder attaching device 1.

The pair of rails R are fastened to a plurality of sleepers M by bolts B1 of a rail fastening device. Two construction girders 2 are arranged on both sides of the pair of rails R. The four construction girders 2 are arranged in the horizontal direction in a posture extending in the vertical direction. The four construction girders 2 are arranged symmetrically.
The construction girder 2 is parallel to the rail R and shorter than the rail R in the vertical direction. The construction beam 2 has a length over a plurality of sleepers M (9 sleepers M in FIG. 1). The construction girder 2 is disposed outside the sleeper M and does not overlap the sleeper M in plan view. The construction girder 2 is attached to the sleeper M via a support member 3 projecting outward from the sleeper M.

  The support member 3 is made of metal. The support member 3 is a rectangular flat plate having a constant thickness. The support member 3 is shorter than the sleeper M in the vertical direction and the horizontal direction. The support member 3 may be longer than the sleeper M in the vertical direction, or may have a vertical length equal to the sleeper M. The support member 3 is disposed outside the pair of rails R. The support member 3 is fastened to the sleeper M and is cantilevered by the sleeper M.

  The support member 3 supports the two construction girders 2 on the inner side and the outer side. The two inner and outer construction girders 2 are arranged on the support member 3 and overlap the support member 3 in plan view. The two construction girders 2 on the inner side and the outer side are opposed to each other with a gap in the lateral direction. The outer work girder 2 is disposed inside the outer end of the support member 3. Accordingly, the outer end portion of the support member 3 protrudes outward from the outer construction beam 2 in plan view.

2 is a cross-sectional view showing a vertical cross section taken along the line II-II shown in FIG. FIG. 3 is an enlarged view of a part of FIG. FIG. 4 is a side view showing the construction beam 2 viewed in the direction of arrow IV shown in FIG.
As shown in FIG. 2, the support member 3 includes an overlapping portion 4 disposed on the sleeper M, and a protruding portion 5 that protrudes outward from an end Ma on the upper surface of the sleeper M. The overhanging portion 5 is longer in the lateral direction than the overlapping portion 4. The overhanging portion 5 may be shorter than the overlapping portion 4 in the lateral direction, or may have a lateral length equal to that of the overlapping portion 4. The upper surfaces of the overlapping portion 4 and the overhang portion 5 are arranged on the same plane. Similarly, the lower surfaces of the overlapping portion 4 and the overhang portion 5 are arranged on the same plane.

  The overlapping portion 4 of the support member 3 is placed on the sleeper M via the rubber plate 6. The overlapping portion 4 is fastened to the sleeper M by a fastening bolt B2 and an insert nut N2. The rubber plate 6 is sandwiched between the upper surface of the sleeper M and the lower surface of the support member 3. The rubber plate 6 is a flat plate having a constant thickness. The rubber plate 6 is disposed outside the pair of rails R.

  The fastening bolt B <b> 2 is inserted into the through hole of the support member 3 and the through hole of the rubber plate 6 from above the support member 3. The head of the fastening bolt B <b> 2 is disposed on the support member 3. The spring washer SW and the square washer PW are interposed between the head of the fastening bolt B2 and the support member 3. As shown in FIG. 3, the square washer PW is a flat plate smaller than the rubber plate 6 in plan view. The spring washer SW has an annular shape surrounding the shaft portion of the fastening bolt B2. As shown in FIG. 2, the square washer PW is disposed on the support member 3, and the spring washer SW is disposed between the square washer PW and the head of the fastening bolt B2.

  The shaft portion of the fastening bolt B2 passes through the support member 3 and the rubber plate 6 in the vertical direction. The shaft portion of the fastening bolt B <b> 2 protrudes downward from the rubber plate 6. The insert nut N2 is embedded in the sleeper M from the upper surface of the sleeper M. The insert nut N2 is a steel pipe extending in the vertical direction. The male screw provided on the shaft portion of the fastening bolt B2 is attached to the female screw provided on the inner peripheral surface of the insert nut N2. Thereby, the support member 3 is fastened to the sleeper M.

  The insert nut N2 is inserted into the embedding hole 7 extending downward from the upper surface of the sleeper M. The upper end of the insert nut N2 is exposed on the upper surface of the sleeper M. The insert nut N2 is disposed outside the pair of rails R. The sleeper M is a PC sleeper, and the insert nut N2 is fixed to the sleeper M with an adhesive such as polymortar. If the sleeper M is not a concrete sleeper, the insert nut N2 may be fixed to the sleeper M by a method other than bonding.

  The construction beam 2 is placed on the overhanging portion 5 of the support member 3. The upper surface of the overhang portion 5 includes two support portions 5a that support the two construction beams 2 respectively. The construction girder 2 is, for example, an H-section steel. The construction beam 2 includes a pair of flanges 2a and 2c parallel to each other and a web 2b disposed between the pair of flanges 2a and 2c. The construction beam 2 may be a shape steel other than the H-section steel, a square steel pipe, or a steel material other than these. If H-section steel, which is relatively inexpensive, versatile, and has a proven record of strength and durability, is used as the construction beam 2, the construction beam 2 can be procured at low cost without requiring special processing.

  The lower flange 2 c of the construction beam 2 is placed on the overhanging portion 5 of the support member 3. The lower flange 2 c is in contact with the support member 3. As shown in FIG. 4, the upper surface of the upper flange 2 a corresponding to the upper end of the construction beam 2 is disposed below the top surface Ra of the rail R. If the upper end of the work girder 2 is disposed below the lower limit (building limit), the upper end of the work girder 2 may be located above the head long surface Ra of the rail R.

  As shown in FIG. 2, the work girder 2 is fastened to the support member 3 by a work girder fastening device 8. The work girder fastening device 8 includes a plurality of presser plates 9a and 9b disposed on the lower flange 2c of the work girder 2, a plurality of presser bolts B3 for pressing the plurality of presser plates 9a and 9b downward, and a plurality of presser bolts B3. And a plurality of presser nuts N3 for fixing the presser bolt B3 to the support member 3. The plurality of presser plates 9a and 9b include two one-side presser plates 9a that hold only one of the inner and outer two construction girders 2, and both side presser plates 9b that hold both the inner and outer two work girders 2. Including.

  Both side pressing plates 9b are arranged between the pair of construction beams 2. One side holding plate 9 a is arranged inside the inner work beam 2, and the other one side holding plate 9 a is arranged outside the outer work beam 2. The both-side holding plates 9b are disposed on the lower flange 2c of the pair of construction girders 2. The inner side pressing plate 9a is disposed on the lower flange 2c of the inner construction beam 2. The outer one-side presser plate 9 a is disposed on the lower flange 2 c of the outer work beam 2.

  The both-side presser plate 9b is a metal flat plate having a through hole through which the shaft portion of the presser bolt B3 passes. The one-side presser plate 9a includes a metal upper flat plate 9a1 formed with a through hole through which a shaft portion of the presser bolt B3 is passed, and a metal lower flat plate 9a2 arranged below the upper flat plate 9a1. The lower flat plate 9a2 is welded to the upper flat plate 9a1. The lower flat plate 9a2 may have the same thickness as the lower flange 2c of the construction beam 2 or may be thinner than the lower flange 2c. As shown in FIG. 3, the lower flat plate 9a2 is a flat plate smaller than the upper flat plate 9a1 in plan view.

  As shown in FIG. 2, the presser bolt B <b> 3 is inserted from above the presser plates 9 a and 9 b into the through holes of the presser plates 9 a and 9 b and the through holes of the support member 3. The head of the presser bolt B3 is disposed on the presser plates 9a and 9b. The head of the presser bolt B3 is disposed below the upper flange 2a of the work beam 2. An annular spring washer SW surrounding the shaft portion of the presser bolt B3 is interposed between the head of the presser bolt B3 and the presser plates 9a and 9b. The shaft portion of the presser bolt B3 passes through the presser plates 9a and 9b and the support member 3 in the vertical direction. The shaft portion of the presser bolt B <b> 3 protrudes downward from the support member 3.

  The presser nut N <b> 3 is disposed below the support member 3. The presser nut N <b> 3 is in contact with the lower surface of the support member 3. The presser nut N <b> 3 is welded to the support member 3. The male screw provided on the shaft portion of the presser bolt B3 is attached to the female screw provided on the inner peripheral surface of the presser nut N3. The axial force of the presser bolt B3 is transmitted to the lower flange 2c of the work girder 2 through the presser plates 9a and 9b. Thereby, the lower flange 2c of the construction beam 2 is sandwiched vertically between the pressing plates 9a, 9b and the support member 3.

  In this way, the outer end portion and the inner end portion of the lower flange 2c of the work beam 2 are pressed against the support member 3 by the two pressing plates 9a and 9b, respectively. Thereby, each construction girder 2 is fixed to the support member 3. Further, since the same press plate (both side press plates 9b) presses the lower flange 2c of the two construction girders 2, the number of the press plates 9a, 9b can be reduced, and the press plates 9a, 9b are installed and removed. The labor and time required for the process can be reduced. In addition, since the both-side presser plates 9b are placed on the lower flanges 2c of the two construction girders 2, it is not necessary to provide the lower flat plate 9a2 unlike the one-side presser plates 9a.

  As shown in FIG. 3, the presser bolt B3 for the both-side presser plates 9b is disposed between the upper flanges 2a of the two construction girders 2 in plan view. The both-side presser plate 9b and the one-side presser plate 9a overlap one or both of the two construction girders 2 in plan view. The inner end portion of the inner one-side presser plate 9a is disposed on the sleeper M and overlaps the sleeper M in plan view. On the other hand, the outer one side pressing plate 9a and the both side pressing plates 9b are arranged outside the sleeper M and do not overlap the sleeper M in a plan view. As shown in FIG. 4, the shaft portion of the presser bolt B3 and the presser nut N3 overlap the sleeper M in a side view.

Next, an example of a construction girder mounting method will be described.
5A to 5E are cross-sectional views for explaining an example of a construction girder attaching method for attaching four construction girders 2 to an existing sleeper M. FIG.
When the four construction girders 2 are attached to a plurality of sleepers M, a mark is made at a drilling position where the embedding hole 7 is formed on the upper surface of the sleepers M. Then, the front-end | tip of the core drill 10 which sharpens the sleeper M is applied to a drilling position. As shown in FIG. 5A, the core drill 10 is rotated in this state to scrape the sleeper M, and a bottomed hole having an inner diameter larger than the outermost diameter of the insert nut N2 is dug. Thereby, the embedding hole 7 is formed. Thereafter, the shavings of the sleeper M are removed from the embedding hole 7 and the embedding hole 7 is cleaned. A buried hole 7 is formed at the end of each sleeper M by the same procedure.

  Next, the filling hole 7 is filled with an adhesive such as polymortar. Thereafter, as shown in FIG. 5B, an insert nut N <b> 2 whose outer peripheral surface is coated with a lining agent is inserted into the embedding hole 7 in order to increase the adhesive strength. When a predetermined time elapses after the insert nut N2 is inserted, the adhesive is hardened in the embedding hole 7. Thereby, the insert nut N2 is fixed to the sleeper M. The plurality of insert nuts N2 are fixed to both ends of the plurality of sleepers M by the same procedure.

  Next, the rubber plate 6 is placed on the sleeper M, and the support member 3 is placed on the rubber plate 6. Thereafter, as shown in FIG. 5C, a square washer PW is placed on the support member 3, and the shaft portion of the fastening bolt B2 to which the spring washer SW is attached passes through the support member 3 and the rubber plate 6 from above the support member 3. Insert into the hole. Further, the male screw of the fastening bolt B2 is attached to the female screw of the insert nut N2. Accordingly, the support member 3 is sandwiched between the fastening bolt B2 and the sleeper M, and is fixed to the sleeper M. The plurality of support members 3 are fixed to both ends of the plurality of sleepers M by the same procedure.

  Next, as shown in FIG. 5D, the two construction girders 2 are placed on the plurality of support members 3 arranged on the right side of the pair of rails R. Similarly, two construction girders 2 are placed on the plurality of support members 3 arranged on the left side of the pair of rails R. As a result, the four construction girders 2 are placed on the plurality of support members 3. Laying the work girder 2 on which the work girder 2 is placed on the support member 3 may be performed manually or by a transport vehicle. Since the construction girder 2 according to the present embodiment is, for example, 5 m long and 85 kg in weight, one construction girder 2 can be placed on the support member 3 by about two workers.

  Next, as shown in FIG. 5E, the inner end portion and the outer end portion of the both-side presser plates 9 b are placed on the lower flanges 2 c of the two construction girders 2. Similarly, the inner side pressing plate 9a is placed on the lower flange 2c of the inner work girder 2, and the outer side pressing plate 9a is placed on the lower flange 2c of the outer work girder 2. Although the inner side pressing plate 9a can be placed only on the inner work girder 2, a lower flat plate 9a2 is provided at the inner end of the inner side pressing plate 9a. Similarly, a lower flat plate 9a2 is provided at the outer end portion of the outer one-side presser plate 9a. Therefore, it is possible to regulate the inclination of the one-side presser plate 9a during temporary placement.

  Next, as shown in FIG. 5E, the shaft portion of the presser bolt B3 to which the spring washer SW is attached is inserted into the through-holes of the presser plate 9b and the support member 3 from the upper side of the presser plate 9b. Attach the male screw to the female screw of the presser nut N3. Similarly, the shaft portion of the presser bolt B3 to which the spring washer SW is attached is inserted into the one side presser plate 9a and the through hole of the support member 3 from above the one side presser plate 9a, and the male screw of the presser bolt B3 is inserted into the female screw of the presser nut N3. Attach to. According to the same procedure, in each support member 3, one side holding plate 9 b and two one side holding plates 9 a are mounted on the lower flange 2 c of the construction beam 2, and three holding bolts B 3 are respectively set to 3 Attach to one presser nut N3. As a result, the four construction girders 2 are fixed to the plurality of sleepers M.

  As described above, in this embodiment, the insert nut N2 which is an example of the embedding member is embedded in the sleeper M from the upper surface of the existing sleeper M outside the pair of rails R and fixed to the existing sleeper M. Is done. Thereafter, the overlapping portion 4 of the support member 3 is placed on the sleeper M and fastened to the sleeper M by a fastening bolt B2 which is an example of a fixing member. The work girder 2 is placed on the overhanging portion 5 of the support member 3 and fastened to the support member 3 by the work girder fastening device 8.

  In this way, the insert nut N2 of the construction girder mounting device 1 is not embedded in the roadbed, but is embedded in the existing sleeper M. Therefore, unlike the prior art, it is not necessary to scrape the ballast to dig a hole in the roadbed or to fill the hole in the roadbed with the ballast. Therefore, installation and removal of the construction beam 2 can be easily performed, and labor and time required for installation and removal of the construction beam 2 can be reduced. In addition, since the roadbed work is not required when installing and removing the construction girder 2, the construction girder 2 can be constructed even in summer.

  Furthermore, the construction girder 2 is supported by the overhanging portion 5 of the support member 3 that projects outward from the end Ma of the upper surface of the existing sleeper M. The entire construction beam 2 is arranged outside the end Ma on the upper surface of the existing sleeper M. Therefore, compared with the prior art in which the entire construction beam 2 is arranged on the existing sleeper M, the distance between the construction beam 2 and the rail R is increased. Therefore, the track can be maintained from outside the gauge by inserting the tie tamper 11 (see FIGS. 3 and 4) between them. Thereby, the workability of track maintenance can be improved and the maintenance cycle can be lengthened.

  Actually, it was confirmed that the construction girder mounting device 1 according to the present embodiment has the same track settlement suppression effect as the reinforcing girder mounting device according to Patent Document 1. Furthermore, in the construction girder mounting apparatus 1 according to the present embodiment, it was confirmed that the material cost is equal to or less than that of the reinforcing girder mounting apparatus according to Patent Document 1. Moreover, in the construction girder mounting device 1 according to the present embodiment, it was confirmed that the time required to install and remove the construction girder 2 can be reduced by 25% compared to the reinforcing girder mounting device according to Patent Document 1.

Other Embodiments The present invention is not limited to the contents of the above-described embodiments, and various modifications can be made.
For example, the number of construction girders 2 arranged outside the pair of rails R is not limited to four, and may be two. The work girder 2 may be disposed between the pair of rails R and fastened to the sleeper M.

Instead of the entire construction girder 2, only a part of the construction girder 2 may be arranged outside the end Ma on the upper surface of the existing sleeper M.
The presser nut N <b> 3 that fastens the construction beam 2 to the support member 3 may not be welded to the support member 3. In this case, the presser bolt B3 may be welded to the support member 3 instead of the presser nut N3. For example, the presser bolt B3 may be welded to the support member 3 such that the shaft portion of the presser bolt B3 protrudes upward from the through hole of the support member 3.

The presser plates 9a and 9b for pressing the construction girder 2 toward the support member 3 may be omitted. In this case, a through hole through which the shaft portion of the presser bolt B3 passes may be provided in the lower flange 2c of the construction beam 2.
The overlapping portion 4 of the support member 3 may be placed directly on the sleeper M without using the rubber plate 6.
The support member 3 may not be a flat plate. In this case, the protruding portion 5 of the support member 3 may not be arranged on the same plane as the overlapping portion 4 of the support member 3. For example, the overhanging portion 5 that supports the construction beam 2 may be disposed below the overlapping portion 4. In this case, a tall construction girder 2, that is, a more rigid construction girder 2, can be used without hindering the lower limit.

In the construction girder mounting method described above, the example in which the embedded hole 7 is formed in the sleeper M using the core drill 10 has been described, but the embedded hole 7 may be formed in the sleeper M using a hammer drill.
Two or more of all the aforementioned configurations may be combined.
In addition, various design changes can be made within the scope of matters described in the claims.

1: Construction girder mounting device 2: Construction girder 3: Support member 4: Overlapping part 5: Overhang part 5a: Supporting part 6: Rubber plate 7: Embedded hole 8: Construction girder fastening device 9a: One side presser plate 9b: Both side presser Plate 10: Core drill 11: Tie tamper B2: Fastening bolt B3: Presser bolt M: Sleeper Ma: End N2 of the upper surface of the sleeper: Insert nut N3: Presser nut R: Rail

Claims (5)

A construction girder mounting device for attaching a construction girder to a sleeper laid on the roadbed,
An embedded member that is embedded in the sleeper from the upper surface of the sleeper outside the pair of rails fastened to the existing sleeper, and is fixed to the existing sleeper;
An overlapping portion placed on the existing sleeper and an outer surface projecting from the end of the upper surface of the existing sleeper so that at least a part of the construction girder is positioned outside the end of the existing upper surface of the sleeper. A support member including an overhanging portion that supports the construction girder,
A fixing member attached to the embedded member and fixing the support member to the existing sleeper by pushing the overlapping portion toward the upper surface of the existing sleeper;
A construction girder mounting device comprising: a construction girder fastening device that fastens the construction girder supported by the projecting portion to the support member.   The construction girder mounting device according to claim 1, wherein the projecting portion includes a plurality of support portions that respectively support a plurality of construction girders.   The construction girder fastening device includes a presser bolt fixed to the support member, and a presser plate that is pressed toward the work girder by the presser bolt and presses the work girder toward the support member. The construction girder mounting device described in 1 or 2.   The construction girder mounting device according to any one of claims 1 to 3, further comprising a rubber plate disposed between the overlapping portion of the support member and the existing sleeper. A work for attaching a construction girder to the existing sleeper through a support member including an overlapping portion arranged on the sleeper laid on the roadbed and an overhanging portion projecting outward from an end of the upper surface of the existing sleeper. Girder mounting method,
A hole forming step for forming an embedding hole extending downward from the upper surface of the existing sleeper in the sleeper outside a pair of rails fastened to the existing sleeper;
An embedded member attaching step of inserting an embedded member into the embedded hole formed in the existing sleeper, and fixing the embedded member to the existing sleeper;
Place the overlapping part of the supporting member on the existing sleeper, attach a fixing member to the embedded member, and push the overlapping part toward the upper surface of the existing sleeper with the fixing member. A supporting member attaching step for fixing the existing sleeper to the sleeper,
Place the construction girder on the overhanging portion of the support member so that at least a part of the construction girder is located outside the upper end of the existing sleeper, and fasten the construction girder to the support member A construction girder installation method including a construction girder installation process.

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