JP2017160644A - Manufacturing method of joint member, joint member, and expansion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a joint member capable of improving the fatigue limit of a face plate, a joint member and an expansion device.SOLUTION: The manufacturing method of a joint member includes: a first step to form an extruded shape of an aluminum alloy; and a second step to form a face plate which has a plurality of fingers by cutting the extruded shape of aluminum alloy and a dowel which is embedded in the road.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a method for manufacturing a joint member, a joint member, and a telescopic device.

  A telescopic device is provided in the gap (between the bridge girders) of the road bridge. The telescopic device is a device for facilitating the passage of the vehicle during play and for preventing the bridge girders from contacting each other due to linear expansion. As an example of an expansion / contraction apparatus, Patent Document 1 describes an expansion / contraction apparatus including a face plate that can support a wheel load.

Utility Model Registration No. 3174898

  A wheel load repeatedly acts on the face plate. For this reason, fatigue failure may occur in the face plate. On the other hand, since the gibber integrated with the face plate is embedded in the road, the joint member cannot be easily replaced. For this reason, a joint member that can improve the fatigue limit of the face plate is desired.

  The present invention has been made in view of the above problems, and an object thereof is to provide a joint member manufacturing method, a joint member, and a telescopic device that can improve the fatigue limit of a face plate.

  In order to achieve the above object, a manufacturing method of a joint member according to the present invention includes a first step of forming an aluminum alloy extruded shape by extrusion, and cutting the aluminum alloy extruded shape after the first step. Thus, a second step of forming a face plate with a plurality of fingers and a gibber embedded in the road is included.

  If the joint member is manufactured by casting, the joint member may have a casting defect, which may reduce the fatigue limit of the face plate. Further, when welding is used in manufacturing the joint member, there is a possibility that a welding defect may occur in the joint member, which may reduce the fatigue limit of the face plate. On the other hand, according to the manufacturing method concerning the present invention, since a joint member is formed from an aluminum alloy extrusion shape material, generation of a defect in a joint member is controlled. For this reason, the joint member manufacturing method according to the present invention can improve the fatigue limit of the face plate.

  As a desirable mode of the method for manufacturing a joint member according to the present invention, it is preferable that a bolt groove capable of holding the head of the bolt is formed in the first step so that the bolt can slide.

  Thereby, the cutting process etc. for forming a bolt groove become unnecessary. For this reason, manufacture of a joint member becomes easier.

  The joint member according to the present invention is an aluminum alloy extruded profile, and includes a face plate including a plurality of fingers and a diver embedded in a road.

  Thereby, generation | occurrence | production of the defect in a joint member is suppressed. For this reason, the joint member can improve the fatigue limit of the face plate.

  The telescopic device according to the present invention includes a joint member that includes a hanging wall that protrudes downward from the face plate and includes a bolt groove that can hold a head of the bolt so that the bolt can slide. A packing provided; and a packing support member fixed to the hanging wall by a bolt attached to the bolt groove and supporting the packing.

  Thereby, the position adjustment of the bolt is easy. Further, the packing support member is fixed to the hanging wall by tightening the nut attached to the bolt. For this reason, attachment work of a packing support member is easy. When the nut is removed, the packing support member can be removed while the bolt is held in the bolt groove. For this reason, the exchange work of packing is easy.

  As a desirable aspect of the expansion and contraction device according to the present invention, the packing includes end flanges at both ends in the longitudinal direction of the road, and the packing support member includes a bolt hole at a position corresponding to the bolt groove. And a packing pressing part that is provided above the attachment part and presses the end ridge against the hanging wall.

  Thereby, a packing support member is fixed by the attaching part located below rather than packing. For this reason, since the attachment portion is exposed when viewed from below the gap, the removal work of the packing support member is facilitated. Therefore, the replacement work of the packing becomes easier. Moreover, since the member which presses a packing exists in a different position with respect to the member which has a bolt hole for penetrating a bolt, the water leakage through a bolt hole is prevented. Therefore, the water tightness of the telescopic device is improved.

  As a desirable mode of the expansion and contraction device according to the present invention, it is preferable that the end flange includes a convex portion that protrudes on the opposite side to the hanging wall, and the packing pressing portion includes a concave portion that fits into the convex portion. .

  Thereby, in a state where the convex portion is fitted in the concave portion, the end ridge is pressed against the hanging wall by the packing pressing portion, and therefore the end ridge is easily adhered to the hanging wall. Thereby, the water-tightness of an expansion-contraction apparatus improves.

  As a desirable aspect of the expansion and contraction device according to the present invention, the packing support member is preferably an aluminum alloy extruded profile.

  Thereby, manufacture of a packing support member becomes easy. In addition, since the dimensional accuracy of the packing support member is improved, the packing support member can be easily attached.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of a joint member which can improve the fatigue limit of a faceplate, a joint member, and an expansion-contraction apparatus can be provided.

FIG. 1 is a plan view showing the telescopic device according to the present embodiment. 2 is a cross-sectional view taken along line AA in FIG. 3 is a cross-sectional view taken along the line BB in FIG. FIG. 4 is a side view of the first packing support member according to the present embodiment. FIG. 5 is a side view of the second packing support member according to the present embodiment. FIG. 6 is a flowchart showing a method for manufacturing the joint member according to the present embodiment. FIG. 7 is a perspective view of the aluminum alloy extruded profile before becoming a joint member according to the present embodiment. FIG. 8 is a perspective view showing an aluminum alloy extruded profile before becoming a joint member according to the present embodiment. FIG. 9 is a plan view showing a cutting position with respect to an aluminum alloy extruded shape when forming the outer shapes of the fingers and the gibber. FIG. 10 is a side view showing a cutting position with respect to the intermediate member when the connection hole is formed. FIG. 11 is a plan view showing a joint member according to a modification. FIG. 12 is a plan view showing a cutting position with respect to an aluminum alloy extruded shape when forming the outer shapes of the fingers and the gibber in the joint member manufacturing method according to the modification.

  Embodiments for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited by the contents described in the following embodiments. The constituent elements described below include those that can be easily assumed by those skilled in the art and those that are substantially the same. Furthermore, the constituent elements described below can be appropriately combined. In addition, some components may not be used.

(Embodiment)
FIG. 1 is a plan view showing the telescopic device according to the present embodiment. 2 is a cross-sectional view taken along line AA in FIG. 3 is a cross-sectional view taken along the line BB in FIG. However, in FIG. 2, the description of the joint member 1 located on the lower side in FIG. 1 is omitted. The telescopic device 10 according to the present embodiment is provided in the gap 101. The free space 101 is a gap between the bridge girders of the road bridge. In the following description, the upper part in the vertical direction is simply referred to as the upper part, and the lower part in the vertical direction is simply referred to as the lower part.

  The telescopic device 10 is a device for facilitating traveling of the vehicle passing above the gap 101 and preventing the bridge girders from contacting each other due to linear expansion. Further, the telescopic device 10 can prevent water flowing into the gap 101 from entering the bridge girder and support of the road bridge. As shown in FIGS. 1 to 3, the telescopic device 10 includes a joint member 1, a packing 5, a filler 6, a first packing support member 2, and a second packing support member 3.

  The joint member 1 is a member that bears the load of the vehicle traveling on the road 100. The joint member 1 is an aluminum alloy extruded shape. The telescopic device 10 includes a plurality of joint members 1. The plurality of joint members 1 are arranged in the width direction of the road 100 and are connected by a connecting member 19 including a rod 191 and a plurality of nuts 192. The rows of the joint members 1 connected by the connecting members 19 are arranged on each side of the gap 101. As shown in FIG. 1, the joint members 1 in one row are arranged in the opposite direction to the joint members 1 in the other row. In the following description, the column of the joint members 1 on the right side in FIG. 3 is described as a first column, and the column of the joint members 1 on the left side in FIG. 3 is described as a second column. As shown in FIG. 3, the joint member 1 includes a face plate 11, a hanging wall 13, and a dowel 12. The face plate 11, the drooping wall 13, and the dowel 12 are integrally formed.

  The face plate 11 is a plate-like member that is substantially parallel to the road surface of the road 100. A vehicle traveling on the road 100 contacts the upper surface of the face plate 11. For example, sandblasting is applied to the upper surface of the face plate 11. Thereby, the frictional force between the face plate 11 and the vehicle tire increases. As shown in FIG. 1, the face plate 11 includes a plurality of fingers 111. The finger 111 is a protrusion that protrudes toward the gap 101. The plurality of fingers 111 are arranged at equal intervals along the width direction of the road 100 (longitudinal direction of the joint member 1). That is, the face plate 11 is a comb-like member in plan view. The fingers 111 in the first row are arranged between the adjacent fingers 111 in the second row. That is, the fingers 111 in the first row and the fingers 111 in the second row are alternately arranged.

  As shown in FIG. 3, the hanging wall 13 is a member that protrudes downward from the face plate 11. The hanging wall 13 includes a bolt groove 131 and a positioning groove 132. The bolt groove 131 is a groove along the width direction of the road 100. The bolt groove 131 can hold the head of the bolt 41 so that the bolt 41 can slide in the width direction of the road 100. More specifically, the vertical length of the bolt groove 131 is larger than the two-surface width of the bolt 41 that is a hexagonal bolt and smaller than the diagonal distance. The positioning groove 132 is a groove along the width direction of the road 100. The positioning groove 132 is disposed above the bolt groove 131, for example.

  The bevel 12 is a member that protrudes from the drooping wall 13 to the opposite side of the gap 101 and is embedded in the road 100. The joint member 1 includes a plurality of dowels 12. For example, the plurality of dowels 12 are arranged at equal intervals along the width direction of the road 100. The bevel 12 includes a connection hole 123, a reinforcing bar hole 121, and a reinforcing bar hole 122. The connection hole 123 is used when connecting the joint members 1 adjacent in the width direction of the road 100. The connecting member 19 shown in FIG. 1 is attached to the connecting hole 123. The reinforcing bar hole 121 and the reinforcing bar hole 122 are used when the dowel 12 is embedded in the road 100. Specifically, after the reinforcing bars are disposed so as to penetrate the reinforcing bar holes 121 and the reinforcing bar holes 122, concrete is poured into the periphery of the gibber 12. As the concrete hardens, the gibber 12 is integrated with the road 100.

  The packing 5 is a member for preventing water flowing into the gap 101 from entering the bridge girder and the support. The packing 5 is, for example, a member that expands and contracts in an accordion manner, and is formed of ethylene propylene diene rubber (EPDM). The packing 5 is disposed below the face plate 11. Further, the packing 5 includes end flanges 51 at both ends in the longitudinal direction of the road 100. The end flange 51 is in contact with the hanging wall 13 of the joint member 1. That is, the packing 5 closes the gap between the opposing joint members 1. The packing 5 receives water flowing into the gap 101 and guides it to the end of the road 100 in the width direction. The water guided to the end in the width direction of the road 100 is drained to the outside of the play room 101 through a drainage port or the like.

  The filler 6 is a member for preventing dust and the like from flowing into the packing 5. The filler 6 is disposed between the face plate 11 and the packing 5. The filler 6 is, for example, a flame retardant urethane foam. Further, since the filler 6 is in contact with the face plate 11, the filler 6 acts as a vibration damping material on the face plate 11. Thereby, the filler 6 can reduce the running noise of the vehicle.

  The 1st packing support member 2 and the 2nd packing support member 3 are members for supporting packing 5, Comprising: For example, it is an aluminum alloy extrusion shape material. As shown in FIG. 2, the first packing support member 2 and the second packing support member 3 are alternately arranged along the width direction of the road 100. Yes. As shown in FIG. 3, the first packing support member 2 and the second packing support member 3 are fixed to the hanging wall 13 by a fastening member 4. The first packing support member 2 attached to the joint member 1 in the first row faces the second packing support member 3 attached to the joint member 1 in the second row. The second packing support member 3 attached to the first row joint member 1 faces the first packing support member 2 attached to the second row joint member 1.

  As shown in FIG. 3, the fastening member 4 includes a bolt 41 that is a hexagonal bolt and a nut 42. The head of the bolt 41 is held in the bolt groove 131. The head of the bolt 41 is inserted into the bolt groove 131 from the end opening in the longitudinal direction of the bolt groove 131. The head of the bolt 41 can slide inside the bolt groove 131. For this reason, the position adjustment of the bolt 41 is easy. On the other hand, since the vertical length of the bolt groove 131 is larger than the two-surface width of the bolt 41 and smaller than the diagonal distance, the bolt 41 cannot rotate when the head of the bolt 41 is in the bolt groove 131. The first packing support member 2 or the second packing support member 3 is attached to the shaft portion of the bolt 41 whose position has been adjusted, and is fastened to the drooping wall 13 by a nut 42. Since the bolt 41 does not rotate, the tightening operation of the nut 42 is easy.

  FIG. 4 is a side view of the first packing support member according to the present embodiment. As shown in FIG. 4, the first packing support member 2 includes an attachment portion 21, a packing pressing portion 22, a protruding portion 23, and a packing receiving portion 24. The attachment part 21, the packing pressing part 22, the protrusion part 23, and the packing receiving part 24 are integrally formed. The attachment portion 21 is a plate-like member that contacts the hanging wall 13 of the joint member 1 and includes a bolt hole 211. The shaft portion of the bolt 41 shown in FIG. 3 passes through the bolt hole 211. The packing pressing portion 22 is a plate-like member provided above the attachment portion 21 and includes a recess 221. The recess 221 is a recess provided on the surface of the packing pressing portion 22 that faces the drooping wall 13. The protrusion 23 is a protrusion provided on the surface of the mounting portion 21 that faces the hanging wall 13. The protrusion 23 can fit into the positioning groove 132 of the drooping wall 13. For this reason, the vertical positioning of the first packing support member 2 is easy. The packing receiving portion 24 is a plate-like member that protrudes from the upper end portion of the mounting portion 21 (the lower end portion of the packing pressing portion 22) to the side opposite to the hanging wall 13, for example. The packing receiving portion 24 suppresses the bending of the packing 5 by supporting the lower surface of the packing 5. For example, as shown in FIG. 3, the tip of the packing receiving portion 24 is located on the second packing support member 3 side facing the center of the packing 5 in the short direction. Moreover, the packing receiving part 24 is provided with the inclined surface 241 which falls toward the front-end | tip at the front-end | tip of an upper surface. The inclined surface 241 makes it difficult for the packing 5 to be caught by the packing receiving portion 24 when the packing 5 expands and contracts.

  As shown in FIG. 4, the end flange 51 of the packing 5 includes a convex portion 511. The end flange 51 is pressed against the hanging wall 13 by the packing pressing portion 22. That is, the end flange 51 is sandwiched between the packing pressing portion 22 and the hanging wall 13. The convex portion 511 is provided, for example, on the distal end side of the end flange 51 and protrudes on the opposite side to the hanging wall 13. In other words, the thickness of the convex portion 511 is larger than the thickness of the root portion of the end flange 51. The convex part 511 is fitted in the concave part 221 of the packing pressing part 22. Since the convex portion 511 is pressed against the drooping wall 13 by the packing pressing portion 22 in a state of being fitted in the concave portion 221, the convex portion 511 is easily in close contact with the dripping wall 13. Thereby, the water tightness of the packing 5 improves.

  FIG. 5 is a side view of the second packing support member according to the present embodiment. As shown in FIG. 5, the second packing support member 3 includes an attachment portion 31, a packing pressing portion 32, and a protruding portion 33. The attachment part 31, the packing pressing part 32, and the projection part 33 are integrally formed. The attachment portion 31 is a plate-like member that contacts the hanging wall 13 of the joint member 1 and includes a bolt hole 311. The shaft portion of the bolt 41 shown in FIG. 3 passes through the bolt hole 311. The packing pressing portion 32 is a plate-like member provided above the attachment portion 31 and includes a recess 321. The recess 321 is a recess provided on the surface of the packing pressing portion 32 that faces the hanging wall 13. The protrusion 33 is a protrusion provided on the surface of the mounting portion 31 that faces the hanging wall 13. The protrusion 33 can fit into the positioning groove 132 of the drooping wall 13. For this reason, the vertical positioning of the second packing support member 3 is easy.

  The end flange 51 is pressed against the hanging wall 13 by the packing pressing portion 32. That is, the end flange 51 is sandwiched between the packing pressing portion 32 and the hanging wall 13. The convex part 511 is fitted in the concave part 321 of the packing pressing part 32. Since the convex portion 511 is pressed against the drooping wall 13 by the packing pressing portion 32 in a state where the convex portion 511 is fitted in the concave portion 321, the convex portion 511 is easily adhered to the dripping wall 13. Thereby, the water tightness of the expansion-contraction apparatus 10 improves.

  FIG. 6 is a flowchart showing a method for manufacturing the joint member according to the present embodiment. FIG. 7 is a perspective view of the aluminum alloy extruded profile before becoming a joint member according to the present embodiment. FIG. 8 is a perspective view showing an aluminum alloy extruded profile before becoming a joint member according to the present embodiment. FIG. 9 is a plan view showing a cutting position with respect to an aluminum alloy extruded shape when forming the outer shapes of the fingers and the gibber. FIG. 10 is a side view showing a cutting position with respect to the intermediate member when the connection hole is formed.

  The joint member 1 according to this embodiment is manufactured from an aluminum alloy extruded profile 9. As shown in FIG. 6, the manufacturing method of the joint member 1 includes, for example, step S1, step S2, and step S3.

  As shown in FIG. 6, an aluminum alloy extruded shape 9 (see FIGS. 7 and 8) is first formed by extrusion (step S1). As shown in FIGS. 7 and 8, the aluminum alloy extruded shape member 9 is a hollow shape member (a hollow shape member) provided with a through hole 921 and a through hole 922. Specifically, a billet that is an aluminum alloy lump formed by casting is extruded from a die. For example, the mold is composed of a male mold and a female mold so that the through hole 921 and the through hole 922 can be formed. The aluminum alloy extruded shape member 9 includes a face plate master 91, a gibber master 92, and a hanging wall 13. The bolt groove 131 and the positioning groove 132 of the hanging wall 13 are formed in step S1.

  As shown in FIG. 6, after step S <b> 1, the fingers 111 and the outer shape of the diver 12 (the diver prototype 82) are formed (step S <b> 2). Specifically, as shown in FIG. 9, the aluminum member extruded shape member 9 is cut along a line indicated by a two-dot chain line, whereby the intermediate member 8 including the plurality of fingers 111 and the plurality of gibber prototypes 82 is formed. It is formed. More specifically, the face plate master 91 is cut to form a plurality of fingers 111, and the diver master 92 is cut to form the diver master 82. The gibber prototype 82 has the same outer shape as the diver 12, but is different from the diver 12 in that the connecting hole 123 is not provided.

  As shown in FIG. 6, after step S2, the gibber 12 is formed (step S3). Specifically, as illustrated in FIG. 10, the intermediate member 8 is cut along a line indicated by a two-dot chain line, whereby the gibber 12 including the connection hole 123 is formed.

  The connecting hole 123 does not necessarily have to be formed by cutting. For example, the connection hole 123 may be formed by a mold in step S1. That is, the aluminum alloy extruded shape member 9 formed in step S <b> 1 may include the connection hole 123. In such a case, since the face plate 11 and the dowel 12 are formed in step S2, step S3 becomes unnecessary.

  As described above, the manufacturing method of the joint member 1 includes the first step (step S1) of forming the aluminum alloy extruded shape 9 by extrusion, and the aluminum alloy extruded shape 9 is cut after the first step. Thus, a second step (step S2 and step S3) for forming the face plate 11 including the plurality of fingers 111 and the diver 12 embedded in the road 100 is included.

  If the joint member 1 is manufactured by casting, the joint member 1 may have a casting defect, so that the fatigue limit of the face plate 11 may be reduced. Further, when welding is used in the manufacture of the joint member 1, there is a possibility that a welding defect may occur in the joint member 1, so that the fatigue limit of the face plate 11 may be reduced. On the other hand, according to the manufacturing method according to the present embodiment, since the joint member 1 is formed from the aluminum alloy extruded profile 9, the occurrence of defects in the joint member 1 is suppressed. For this reason, the manufacturing method of the joint member 1 according to the present embodiment can improve the fatigue limit of the face plate 11.

  Moreover, in the manufacturing method of the joint member 1, the bolt groove | channel 131 which can hold | maintain the head part of the volt | bolt 41 so that the volt | bolt 41 can slide is formed in a 1st step (step S1).

  Thereby, the cutting process etc. for forming the bolt groove | channel 131 become unnecessary. For this reason, manufacture of the joint member 1 becomes easier.

  Further, the joint member 1 is an aluminum alloy extruded profile, and includes a face plate 11 including a plurality of fingers 111 and a gibber 12 embedded in the road 100.

  Thereby, generation | occurrence | production of the defect in the joint member 1 is suppressed. For this reason, the joint member 1 can improve the fatigue limit of the face plate 11.

  The expansion device 10 is an aluminum alloy extruded shape member that includes the joint member 1, the packing 5, and the packing support members (the first packing support member 2 and the second packing support member 3). The joint member 1 includes a hanging wall 13 that protrudes downward from the face plate 11 and includes a bolt groove 131 that can hold the head of the bolt 41 so that the bolt 41 can slide. The packing 5 is provided below the fingers 111. The packing support members (the first packing support member 2 and the second packing support member 3) are fixed to the drooping wall 13 with bolts 41 attached to the bolt grooves 131 and support the packing 5.

  Thereby, the position adjustment of the bolt 41 is easy. Further, the packing support members (the first packing support member 2 and the second packing support member 3) are fixed to the hanging wall 13 by tightening the nut 42 attached to the bolt 41. For this reason, the mounting work of the packing support members (the first packing support member 2 and the second packing support member 3) is easy. When the nut 42 is removed, the packing support members (the first packing support member 2 and the second packing support member 3) can be removed while the bolts 41 are held in the bolt grooves 131. For this reason, the exchange work of packing 5 is easy.

  Further, in the expansion / contraction device 10, the packing 5 includes end flanges 51 at both ends in the longitudinal direction of the road 100. The first packing support member 2 includes a mounting portion 21 having a bolt hole 211 at a position corresponding to the bolt groove 131, and a packing pressing portion that is provided above the mounting portion 21 and presses the end flange 51 against the hanging wall 13. 22. The second packing support member 3 includes a mounting portion 31 having a bolt hole 311 at a position corresponding to the bolt groove 131, and a packing pressing portion that is provided above the mounting portion 31 and presses the end flange 51 against the hanging wall 13. 32.

  As a result, the packing support members (the first packing support member 2 and the second packing support member 3) are fixed by the attachment portion 21 located below the packing 5. For this reason, since the attachment portion 21 is exposed when viewed from below the gap 101, the removal work of the packing support members (the first packing support member 2 and the second packing support member 3) is facilitated. Therefore, the replacement work of the packing 5 becomes easier. Further, since the member that presses the packing 5 is located at a different position with respect to the member having the bolt hole 211 (or bolt hole 311) for allowing the bolt 41 to pass therethrough, the bolt hole 211 (or bolt hole 311). ) Is prevented from leaking. Therefore, the water tightness of the telescopic device 10 is improved.

  In the telescopic device 10, the end flange 51 includes a convex portion 511 that protrudes on the opposite side of the drooping wall 13. The packing pressing portion 22 includes a concave portion 221 that fits into the convex portion 511. The packing pressing portion 32 includes a concave portion 321 that fits into the convex portion 511.

  As a result, the end flange 51 is pressed against the hanging wall 13 by the packing pressing portion 32 in a state where the convex portion 511 is fitted in the recessed portion 321, so that the end flange 51 is easily adhered to the hanging wall 13. Thereby, the water tightness of the expansion-contraction apparatus 10 improves.

  Moreover, in the expansion-contraction apparatus 10, the packing support members (the first packing support member 2 and the second packing support member 3) are aluminum alloy extruded shapes.

  Thereby, manufacture of a packing support member (the 1st packing support member 2 and the 2nd packing support member 3) becomes easy. In addition, since the dimensional accuracy of the packing support members (the first packing support member 2 and the second packing support member 3) is improved, the mounting operation of the packing support members (the first packing support member 2 and the second packing support member 3) is performed. It becomes easy.

(Modification)
FIG. 11 is a plan view showing a joint member according to a modification. FIG. 12 is a plan view showing a cutting position with respect to an aluminum alloy extruded shape when forming the outer shapes of the fingers and the gibber in the joint member manufacturing method according to the modification. Note that the same components as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 11, the joint 1 member A according to the modification includes a face plate 11 </ b> A different from the face plate 11 described above. The face plate 11A includes a plurality of fingers 111A. In a plan view, the straight line L2 along the longitudinal direction of the finger 111A forms an angle θ with respect to the straight line L1 along the protruding direction of the dowel 12.

  The manufacturing method of the joint member 1A differs from the manufacturing method shown in FIG. 6 in the cutting position in step S2. In the manufacturing method of the joint member 1A, after the aluminum alloy extruded profile 9 is formed, the outer shapes of the fingers 111A and the gibber 12 are formed. Specifically, as shown in FIG. 12, the aluminum alloy extruded shape member 9 is cut along a line indicated by a two-dot chain line, so that an intermediate member 8 </ b> A including a plurality of fingers 111 </ b> A and a plurality of dowel prototypes 82 is formed. It is formed. More specifically, the face plate master 91 is cut to form a plurality of fingers 111A, and the diver master 92 is cut to form the diver master 82.

1, 1A Joint member 11, 11A Face plate 111, 111A Finger 12 Divell 121, 122 Reinforcing bar hole 123 Connecting hole 13 Drooping wall 131 Bolt groove 132 Positioning groove 10 Stretching device 100 Road 101 Free play 19 Connecting member 191 Rod 192 Nut 2 First packing support member 21 Mounting portion 211 Bolt hole 22 Packing pressing portion 221 Recess 23 Protrusion portion 24 Packing receiving portion 3 Second packing support member 31 Mounting portion 311 Bolt hole 32 Packing pressing portion 321 Recess 33 Protrusion portion 4 Fastening member 41 Bolt 42 Nut 5 Packing 51 End flange 511 Protrusion 6 Filler 8, 8A Intermediate member 82 Giber prototype 9 Aluminum alloy extruded profile 91 Face plate prototype 92 Giber prototype

Claims (7)

A first step of forming an aluminum alloy extruded profile by extrusion;
After the first step, by cutting the aluminum alloy extruded profile, a second step of forming a face plate with a plurality of fingers and a diver embedded in the road;
The manufacturing method of the joint member used for the expansion-contraction apparatus of a road bridge including this.   The method for manufacturing a joint member according to claim 1, wherein a bolt groove capable of holding a head portion of the bolt is formed in the first step so that the bolt can slide. An aluminum alloy extruded profile,
A faceplate with a plurality of fingers;
A gibber embedded in the road,
A joint member used for a road bridge telescopic device. The joint member according to claim 3, further comprising a hanging wall that protrudes downward from the face plate and includes a bolt groove that can hold a head of the bolt so that the bolt can slide.
Packing provided below the fingers;
A packing support member which is fixed to the hanging wall with a bolt attached to the bolt groove and supports the packing;
Telescopic device comprising: The packing includes end flanges at both ends in the longitudinal direction of the road,
The packing support member includes a mounting portion having a bolt hole at a position corresponding to the bolt groove, and a packing pressing portion that is provided above the mounting portion and presses the end flange against the hanging wall. The telescopic device according to claim 4. The end hook includes a convex portion that protrudes on the opposite side of the hanging wall,
The expansion / contraction apparatus according to claim 5, wherein the packing pressing portion includes a concave portion that fits into the convex portion. The expansion / contraction apparatus according to claim 4, wherein the packing support member is an aluminum alloy extruded shape member.

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