JP2014136608A - Joint structure, passenger conveyor having joint structure and method of installing passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tensile joint which has excellent assembly workability and a truss structure capable of withstanding high load.SOLUTION: A joint structure is for connecting together rod-like members on which tensile load acts by using a connection member, and each of the rod-like members to be connected to each other has a step which has an engagement surface to be engaged in the connection member. The connection member has engagement surfaces which come in contact with the engagement surface of the step and is engaged in the step, with each of the steps of the rod-like members to be connected mutually held between the engagement surfaces of the connection member. When a tensile load acts, the rod-like members including the steps separate from each other.

Description

  The present invention relates to a joint structure, a passenger conveyor having a joint structure, and a method for installing the passenger conveyor, and in particular, a joint structure of a rod-shaped member that is excellent in assembling workability and can withstand a high load, and a passenger having the joint structure The present invention relates to a conveyor and its installation method.

  In some parts of ordinary escalators, moving walkways, cranes, and bridges, these structures are assembled by joining many rod-shaped members, and can be regarded as truss structures or truss structures. That is, it is the axial force in the tension direction or the compression direction that is dominant in the load acting on these rod-shaped members.

  By the way, since these products are large-sized, they are separated into a plurality of parts and transported to the installation site, and the separation points are assembled at the installation site. The connection point of the rod-shaped member assembled at the installation site is called a joint. Of the joints that are subjected to a compressive load, the joints may be joined with such strength that the rod-shaped members do not deviate in a direction perpendicular to the longitudinal direction of the rod-shaped members. However, it is necessary to join firmly in order to withstand this tensile load in a joint on which a tensile load acts. Welding may be used for joints that require such strong joints, but there are installation sites where fire cannot be used and bolt fastening for reasons such as requiring relatively large equipment. Is often used.

  The bolt fastening method is roughly classified into a method using a bolt axial force and a method using a shearing force. In the joint structure using axial force, a flat plate orthogonal to the longitudinal direction is provided at the end of the rod-shaped member, and the opposing flat plates are bolted together. Even if a plurality of bolts are arranged, the load concentrates on the bolt close to the centroid of the cross-section of the rod-like member. Therefore, it is necessary to use a large-diameter bolt to increase the load transmitted by the joint. At this time, it is necessary to separate the bolt from the rod-shaped member so as to avoid interference between the bolt fastening tool and the rod-shaped member, and the distance between the centroid of the cross-section of the rod-shaped member and the centroid of the cross-section of the bolt becomes long. As a result, the moment acting on the rod-shaped member or bolt increases in proportion to this distance, and a vicious cycle occurs in which the bolt diameter is further increased to withstand this increased moment. There is an upper limit to the load that can be produced.

  On the other hand, in a joint structure using a shearing force, a flat plate is disposed so as to straddle two connected rod-shaped members, and the flat plate and each rod-shaped member are bolted. In general, this bolt is pressure-bonded to a flat plate or a rod-like member, so in order to ensure the strength as designed, the position and diameter of the bolt holes provided in the flat plate or the rod-like member need to be processed with high accuracy. is there. Furthermore, at the installation site, it is necessary to align a plurality of bolt holes of the flat plate and the rod-shaped member, and there is a problem in assembling workability.

  In response to these joint structure problems, Patent Document 1 discloses a joint having a structure in which an engagement main body is provided at each end of two rod-shaped members to be connected, and the two engagement main bodies are sandwiched between the engagement bodies. .

JP-A-52-112984

  However, the joint structure of Patent Document 1 has the following problems. The first problem relates to assembly workability. When assembling so that the engagement main body is inserted inside the engagement body, a large frictional force is generated because there is no gap between them. In order to insert the engaging body, it is necessary to generate a large load exceeding the frictional force, and there is a problem in assembling workability.

  The second problem relates to the allowable transmission load. That is, since the engagement main body is provided only on one surface of the rod-shaped member, the load is transmitted only on this surface in the vicinity of the engagement main body, and the load is hardly transmitted on the other surface of the rod-shaped member. As a result, there is a problem that the allowable transmission load of the bar-shaped member in the vicinity of the engagement main body is smaller than the allowable transmission load of the bar-shaped member at a position sufficiently away from the joint. Furthermore, in order to suppress the deformation of the engaging body that increases the distance between the abutting surfaces of the engaging body and the engaging body due to the tensile load, there is a problem that the plate thickness of the engaging body must be increased.

  In the first joint structure of the present invention, in order to solve the first problem, a gap is provided not only between the connected rod-shaped members but also between the engagement main bodies. To do.

  And in the 2nd joint structure among the present invention, in order to solve the 2nd subject of the above, one connection member engages with each level difference of at least two flat plates in one rod-shaped member. It is characterized by that.

  According to the first joint structure of the present invention, since the gaps are provided between the rod-shaped members to be connected and between the engagement main bodies, it is possible to bring them closer to each other than the completed state at the time of assembly. . As a result, the engaging body can be arranged without receiving a resistance such as a frictional force, and the assembling workability is remarkably improved. If the load to be approached is released, the engagement body and the engagement main body are automatically brought into a desired engagement state by the tensile load acting on the rod-shaped member.

  Further, according to the second joint structure of the present invention, since the engagement main body is provided on the plurality of surfaces constituting the rod-shaped member, load transmission using the plurality of surfaces of the rod-shaped member is possible even in the vicinity of the engagement main body. Thus, the allowable transmission load can be increased. In addition, when the engaging bodies engaged with the adjacent engaging main bodies are integrated, the deformation of each engaging body is suppressed, so that the plate thickness of the engaging body can be reduced.

The completion state of the joint of Example 1 of the present invention is shown. It is an enlarged view of the rod-shaped member which has the level | step difference of Example 1 of this invention. It is an enlarged view of the connection member of Example 1 of the present invention. The state in the middle of the assembly of the joint of Example 1 of the present invention is shown. It is an enlarged view of the rod-shaped member which has the level | step difference of Example 2 of this invention. It is an enlarged view of the rod-shaped member which has the level | step difference of Example 3 of this invention. The completion state of the joint of Example 4 of the present invention is shown. The completed state of the joint of Example 5 of the present invention is shown. It is an enlarged view of the connection member of Example 5 of the present invention. The completed state of the joint of Example 6 of the present invention is shown. It is a side view of the main frame of the escalator which is one of the application objects of the coupling of this invention. It is detail drawing of the division part of the upper chord material of an escalator. It is explanatory drawing of the installation method of the escalator to which the coupling of this invention is applied.

  Embodiments of the present invention will be described with reference to the drawings. In each drawing and each embodiment, the same or similar components are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 1 shows a completed state of the joint of Example 1 of the present invention. This joint is for connecting the rod-shaped member 11a and the rod-shaped member 11b divided by the virtual dividing surface 1. Since this joint has a plane-symmetric structure with respect to the dividing surface 1, unless otherwise specified, the following description will be made with respect to the rod-shaped member 11a side of the dividing surface 1, and description of the rod-shaped member 11b side will be omitted. If the symbol a is replaced with the symbol b, the description on the rod-shaped member 11b side can be read.

  A step 21a and a step 22a are provided at the end of the rod-shaped member 11a on the dividing surface 1 side, and the connecting member 31 is engaged with these steps. The connecting member 31 has an engaging portion 32a for the step 21a and an engaging portion 33a for the step 22a, which are connected to the engaging portions 32b and 33b by connecting portions 34 and 35, respectively.

  FIG. 2 shows an enlarged view of the bar-shaped member 11a and steps 21a and 22a of the first embodiment. Both the rod-shaped member 11a and the steps 21a and 22a are separated from the dividing surface 1. The rod-shaped member 11a is a member having an L-shaped cross section composed of a flat plate 12a and a flat plate 13a. At the end of the flat plate 12a on the dividing surface 1 side, a substantially rectangular parallelepiped step 21a is welded to the surface of the flat plate 13a side. Similarly, a substantially rectangular parallelepiped step 22a is welded to the surface of the flat plate 12a at the end of the flat plate 13a on the dividing surface 1 side. Here, the step 21a and the step 22a are integrated at the intersection 23a. In addition, fillet welding is performed on the welding lines 41a and 42a, and edge welding is performed on the welding lines 43a, 44a, 45a, and 46a. Of the surfaces of the steps 21 a and 22 a, the surfaces 24 a and 25 a farthest from the dividing surface 1 are engaging surfaces that engage with the connecting member 31. The surfaces 24a and 25a are inversely tapered with respect to the flat plates 12a and 13a, respectively. That is, the angle θ1 formed by the flat plate 12a and the surface 24a and the angle θ2 formed by the flat plate 13a and the surface 25a are both acute angles.

  FIG. 3 shows an enlarged view of the connecting member 31 according to the first embodiment when viewed from the substantially opposite side to FIG. The engaging portion 32a of the connecting member 31 is provided with an engaging surface 36a parallel to the surface 24a of the step 21a, and the engaging portion 33a is provided with an engaging surface 37a parallel to the surface 25a of the step 22a. Yes. The engagement surfaces 36a and 37a are in contact with the surfaces 24a and 25a, respectively. Similarly, the engaging portion 32b of the connecting member 31 has an engaging surface 36b in contact with the engaging surface of the step 21b of the rod-shaped member 11b, and the engaging portion 33b has an engaging surface of the step 22b of the rod-shaped member 11b. Engaging surfaces 37b in contact with each other are provided. Then, the connecting member 31 includes steps 21a, 22a, 21b, and 22b of the rod-like members 11a and 11b that are connected to each other, sandwiched between the engaging surfaces 36a, 37a, 36b, and 37b of the connecting member 31, and steps 21a, 22a, Engages with 21b and 22b.

  Here, in a state where a tensile load is applied, the rod-shaped members 11a and 11b including the steps 21a, 22a, 21b, and 22b are separated from each other. This effect will be described later. Note that the fact that the bar-shaped members including the step are separated from each other means that the two structures are separated from each other when the step and the bar-shaped member are regarded as one structure.

  Next, a description will be given of a case where a tensile load, that is, a load in which the rod-shaped member 11a tries to move away from the dividing surface 1 is applied to the rod-shaped member 11a with respect to the joint having such a structure. The surfaces 24a and 25a are pressed against the engaging surfaces 36a and 37a, respectively. At this time, the relative position of the connecting member 31 with respect to the rod-shaped member 11a is uniquely determined by the action of the reverse tapered angles θ1 and θ2. That is, the connecting member 31 is automatically positioned with respect to the rod-shaped member 11a. The tensile load transmitted to the connecting member 31 is balanced with the tensile load transmitted from the rod-shaped member 11b. The surfaces 24a and 25a may not be inversely tapered, and the angles θ1 and θ2 may be perpendicular. However, in that case, the connecting member 31 cannot be positioned automatically.

  Further, since the rod-shaped member 11a is a structural member of the truss structure, the dominant force is the axial force, and the moment can be ignored. Therefore, a uniform tensile stress is generated in the cross section of the rod-shaped member 11a at a position sufficiently away from the vicinity of the step. That is, a uniform tensile stress acts on the flat plates 12a and 13a. In the structure exemplified in Patent Document 1, since a step is provided only on one flat plate, the stress is increased only in this flat plate in the vicinity of the step, and the allowable transmission load of the joint is determined. On the other hand, since the steps 21a and 22a are provided on both the flat plates 12a and 13a in the first embodiment, the allowable transmission load of the joint can be increased even with the rod-shaped member 11a having the same size as that of Patent Document 1.

  In the first embodiment, an example in which two flat plates 12a and 13a are used is shown. However, the present invention is not limited to this, and one rod-like member 11a is composed of a plurality of flat plates extending in the longitudinal direction of the rod-like member 11a. Moreover, it is good also as a structure where a level | step difference is provided in each of at least 2 flat plate among several flat plates.

  In Example 1, since one connecting member 31 is engaged with each step of at least two flat plates in one bar-shaped member 11a, the number of connecting members 31 can be reduced. Assembly is also easy.

  1 and 3, chamfers 60a are formed at the end portions of the engaging portions 32a and 33a on the side of the engaging surfaces 36a and 37a. This functions as a guide for inserting the connecting member 31 at the time of assembly, so that the assembling becomes easy and the weight of the connecting member 31 can be reduced. The chamfer 60a can be omitted if unnecessary.

  Further, since the connecting member 31 receives a load that causes the engaging surfaces 36a and 36b to move away from each other, the connecting portion 34 is likely to be subjected to out-of-plane bending deformation. In Patent Document 1, which corresponds to the structure of only the connecting portion 34, in the first embodiment, the connecting portion 34 and the connecting portion 35 are arranged so as to be orthogonal to each other. As a result, since the connecting portions 34 and 35 function as reinforcements, the weight of the connecting portions 34 and 35 can be reduced by reducing the plate thickness.

  If there is no need to reduce the weight, the connecting member 31 may be separated into the engaging parts 32a and 32b and the parts of the connecting part 34 and the engaging parts 33a and 33b and the parts of the connecting part 35. good. Alternatively, in order to simplify the structure, the notched portion 2 provided on the opposite side of the connecting member 31 from the side facing the stepped portion is not removed, and the cross-sectional shape orthogonal to the longitudinal direction of the connecting member 11a is L. The shape may be changed to a rectangle.

  In the first embodiment, an example in which two steps of steps 21a and 22a are provided in one rod-like member 11a has been described. However, if the required strength can be ensured, one step may be provided.

  Next, the assembly method of the joint of Example 1 is shown using FIG. In FIG. 4, the state in the middle of the assembly of the coupling of Example 1 is shown. In the completed state, the rod-shaped member 11a and the steps 21a and 22a are separated from the dividing surface 1. That is, in a state where a tensile load is applied, the rod-shaped members 11a and 11b including a step are separated from each other. Therefore, it is possible to bring the rod-shaped member 11a closer to the dividing surface 1 during assembly, that is, to bring the rod-shaped member 11a and the rod-shaped member 11b closer. At this time, gaps are generated between the surface 24a and the engagement surface 36a and between the surface 25a and the engagement surface 37a. As a result, it is possible to arrange the connecting member 31 without receiving friction or the like. If the load that brings the rod-shaped member 11a closer to the dividing surface 1 is released in this state, the surface 24a is pressed against the engagement surface 36a and the surface 25a is fixed to the engagement surface 37a by the tensile load acting on the rod-shaped member 11a. . Furthermore, if it becomes reverse taper shape as mentioned above, the connection member 31 will be automatically positioned with respect to the rod-shaped member 11a.

  Note that when the tensile load acting on the rod-shaped member 11a is reduced due to vibration of the structure to which the joint of the present invention is applied, the connecting member 31 is not illustrated with bolts or pins not shown in order to prevent the connecting member 31 from falling off. The fixing members may be fixed to both or one of the steps 21a and 22a.

  In the first embodiment, the rod-shaped members 11a and 11b having an L-shaped cross section composed of two flat plates have been described. The same effect can be obtained by providing a step in part or all of the flat plate and integrating adjacent engaging portions of the connecting member. In this case, it is not necessary to unify all the engaging portions, and the same effect can be obtained by integrating at least two engaging portions and dividing the connecting member into a plurality of members in the same manner as in the first embodiment.

  A second embodiment of the present invention will be described with reference to FIG. FIG. 5 is an enlarged view of a rod-shaped member having a step according to the second embodiment of the present invention. The second embodiment differs from the first embodiment in the positions of the steps 21a and 22a and the welding method of the steps 21a and 22a. The steps 21a and 22a are provided at a slight distance from the end of the rod-shaped member 11a. Therefore, fillet welding is performed on the welding lines 41a, 42a, 47a, and 48a, and edge welding is performed on the welding lines 43a and 46a. In this structure, the distance from the welding lines 47a and 48a to the end of the rod-shaped member 11a is used as an adjustment allowance, so that the structure of the present invention can be realized even if the accuracy of the longitudinal dimension of the rod-shaped member 11a is low.

  A third embodiment of the present invention will be described with reference to FIG. FIG. 6 is an enlarged view of a rod-shaped member having a step according to the third embodiment of the present invention. The third embodiment differs from the first embodiment in the positions of the steps 21a and 22a and the joint structure of the steps 21a and 22a. In Example 3, each of the steps 21a and 22a is disposed at the tip of the flat plate 12a and 13a on the split surface 1 side, the weld lines 41a and 42a are fillet welded, the weld lines 49a and 52a are edge welded, and the weld line 50a and 51a are butt welded. At this time, the surfaces of the steps 21a and 22a on the side where the welding lines 50a and 51a are located and the surfaces of the flat plates 12a and 13a are located on the same plane. In this joining structure, since there is no weld bead on the dividing surface 1 side, the steps 21a and 22a can be brought closest to the dividing surface 1, and the length of the connecting member 31 can be minimized.

  A fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 shows a completed state of the joint of Example 4 of the present invention. The fourth embodiment has a structure in which a block 61 is disposed between the step 21a and the step 21b, and a block 62 is disposed between the step 22a and the step 22b. Each of the blocks 61 and 62 is a rod-shaped member having a trapezoidal cross section (desirably an approximately isosceles trapezoid). Regarding the block 61, the surface 63 a corresponding to the hypotenuse of the trapezoid is in contact with the step 21 a, and the surface 64 corresponding to the lower base of the trapezoid is in contact with the connecting portion 34. Similarly, regarding the block 62, the surface 65a corresponding to the hypotenuse of the trapezoid is in contact with the step 22a, and the surface 66 corresponding to the lower base of the trapezoid is in contact with the connecting portion 35. After the connecting member 31 is installed, the blocks 61 and 62 are inserted in a state where a tensile load is applied to the rod-like members 11a and 11b. Therefore, the blocks 61 and 62 can be inserted with a very small load compared to the load for inserting the engaging body disclosed in Patent Document 1. In this structure, even if the tensile load acting on the rod-shaped members 11a and 11b temporarily disappears in an unsteady state such as an earthquake or temporarily changes to a compressive load, the relative relationship between the rod-shaped members 11a and 11b is increased. There is no possibility that the position may change or the connecting member 31 may drop off.

  In addition, when there is a possibility that either or both of the blocks 61 and 62 may fall off due to vibrations of the structure to which the joint of the present invention is applied, the corresponding block is connected to the steps 21a, 22a, 21b, 22b, the connection. One or more members 31 may be fixed by a fixing member such as a bolt or a pin (not shown).

  Note that the modification examples shown in the second to third embodiments can be applied to the structure of the fourth embodiment.

  A fifth embodiment of the present invention will be described with reference to FIGS. FIG. 8 shows a completed state of the joint according to the fifth embodiment of the present invention, and FIG. 9 is an enlarged view of the connecting member according to the fifth embodiment of the present invention. In the fifth embodiment, the connecting member 31 is replaced with the connecting member 38, the blocks 61 and 62 are replaced with the blocks 67 and 68, respectively, and bolts 69 and 70 (the bolt 70 is not shown) are added to the fourth embodiment. is there. The block 67 has a trapezoidal height lower than that of the block 61, and an internal thread through which the bolt 69 passes is added. Similarly, the height of the trapezoid of the block 68 is lower than that of the block 62, and a female screw through which a bolt 70 (not shown) passes is added. The front ends of the bolts 69 and 70 are respectively in recesses 39 and 40 provided on the surface of the connecting member 38.

  The structure of Example 5 is assembled by the following method. First, the connecting member 38 is disposed in a state where the rod-shaped members 11a and 11b are brought close to each other. Next, the load which makes the rod-shaped members 11a and 11b approach is released, and the rod-shaped members 11a and 11b and the connecting member 38 are assembled at predetermined positions. Then, the blocks 67 and 68 are arranged at predetermined positions with the bolts 69 and 70 loosened. At this time, since gaps are generated between the blocks 67 and 68 and the steps 21a, 21b, 22a and 22b and the connecting member 38, the blocks 67 and 68 can be easily arranged. Finally, these bolts are tightened so that the ends of the bolts 69 and 70 enter the recesses 39 and 40, respectively. As a result, the blocks 67 and 68 are prevented from falling off due to friction between the bolt and the recess or interference between the bolt and the recess, and the blocks 67 and 68 are prevented from approaching the rod-shaped member 11a and the rod-shaped member 11b. To do.

  Note that the modification examples shown in the second to third embodiments can be applied to the structure of the fifth embodiment.

  A sixth embodiment of the present invention will be described with reference to FIG. FIG. 10 shows a completed state of the joint of Example 6 of the present invention. In the sixth embodiment, the positions of the steps 26a, 26b, 27a, 27b are changed from the inner side to the outer side of the rod-shaped members 11a, 11b having an L-shaped cross section with respect to the first embodiment. In this case, regarding the bar-shaped member having the same cross-sectional dimension, the length of the weld line between the step and the bar-shaped member can be increased, and the load that can be transmitted by the joint can be increased.

  Note that the modification examples shown in the second to fifth embodiments can be applied to the structure in which the steps are arranged on the outside as in the sixth embodiment.

  Example 7 which applied the coupling of this invention to the escalator which is a kind of passenger conveyor using FIGS. 11-13 is demonstrated. FIG. 11 is a side view of a main frame which is a structure of an escalator which is one of application targets of the joint of the present invention. The upper receiving beam 81 and the lower receiving beam 82 are parts erected in the building, and a frame (main frame) 83 having a truss structure is disposed between them. The frame 83 is mainly composed of an upper chord member 84 and a lower chord member 85 that are L-shaped steel, and the two are connected by a vertical member 86 and a diagonal member 87. The passenger conveyor loads passengers on a carrier (not shown) that circulates and transports the passengers from the entrance to the exit. Therefore, the frame 83 is loaded with the weight of the passengers who ride on the escalator and the equipment for transporting the passengers. Therefore, the frame 83 is in a load state close to both end support beams, and generally, a compressive load is applied to the upper chord member 84 and a tensile load is applied to the lower chord member 85.

  FIG. 12 is a detailed view of the division part of the upper chord material of the escalator. The frame 83 can be divided at the joint portion 88 mainly due to size limitations during transportation. Among the joint portions 88, the joint portion 89 of the upper chord material is provided with flat plates 90a and 90b parallel to the dividing surface at the end portions of the upper chord material 84 (84a and 84b), as shown in FIG. The flat plates 90a and 90b are pressed against each other by a compressive load acting on the upper chord member 84, and are fastened by bolts 91 so that they do not shift due to vibration of the escalator or the like. On the other hand, in the joint part 92 of the lower chord material, any one of the joint structures of Examples 1 to 6 is applied as a joint.

  The escalator installation method will be described with reference to FIG. FIG. 13 is an explanatory diagram of an escalator installation method to which the joint of the present invention is applied. The divided frames are carried to the installation position by a chain block or the like, and the joint portions are connected at this position. At this time, as shown in FIG. 13, when the joint is lifted upward from the completed state, the frame on the upper receiving beam 81 side and the frame on the lower receiving beam 82 side bend around the flat plates 90a and 90b pressed against each other. It deforms as follows. As a result, the bar-shaped member 11a and steps 21a and 22a that are separated from the dividing surface 1 and the bar-shaped member 11b and steps 21b and 22b approach each other. That is, the lower chord material joint 92 is in the state shown in FIG. In this state, when the connecting member 31 or the connecting member 38 is inserted and disposed, and then the load that lifted the joint is released, the bar member 11a, steps 21a, 22a of the lower chord material, the rod member 11b, step 21b , 22b are separated from each other, and a tensile load acts on the lower chord member, and the connecting member 31 or the connecting member 38 is automatically positioned at a predetermined position with respect to the lower chord member 85 as described above. Alternatively, the connecting member 38 is fixed by engaging with the step. Therefore, the assembly workability of the escalator to which the joint of the present invention is applied is markedly improved as compared with the frame installation method in which the bolt is fastened in a state where the bolt is fastened by a chain block or the like.

  11-13 demonstrated the escalator as an example, but the moving sidewalk which is a kind of passenger conveyor is also a load state like a both-ends support beam. Therefore, the same effect as that of the seventh embodiment can be obtained even with the joint of the lower chord material of the moving sidewalk. Further, the same effect can be obtained for a joint portion of a truss structure that is in a loaded state such as a double-end support beam or a cantilever beam in a bridge, a crane, a building, or the like.

  As mentioned above, although the Example of this invention has been described, the structure demonstrated by each Example so far is an example to the last, and this invention can be suitably changed within the range which does not deviate from a technical idea. Further, the configurations described in the respective embodiments may be used in combination as long as they do not contradict each other.

11a, 11b ... Rod-shaped members 21a, 21b, 22a, 22b ... Step 31 ... Connecting members

Claims (7)

In a joint structure that connects rod-shaped members on which a tensile load acts using a connecting member,
Each of the rod-shaped members connected to each other has a step having an engaging surface that engages with the connecting member,
The connecting member has an engaging surface that contacts the engaging surface of the step, and the step of each of the rod-shaped members connected to each other is sandwiched between the engaging surfaces of the connecting member to engage with the step. As well as
The joint structure characterized in that the rod-shaped members including the step are separated in a state where a tensile load is applied. In claim 1,
One of the rod-shaped members is composed of a plurality of flat plates extending in the longitudinal direction of the rod-shaped member, and the step is provided on each of at least two of the plurality of flat plates.
One coupling member among the one rod-shaped members is engaged with each step of the at least two flat plates. In claim 1 or 2,
The joint structure according to claim 1, wherein the engagement surface of the step has a reverse taper shape. In any one of Claim 1 to 3,
A block is provided between the pair of steps sandwiched between the connecting members,
The block is a bar-shaped member having a trapezoidal cross section,
The surface of the block corresponding to the hypotenuse of the trapezoid is in contact with the step,
The joint structure according to claim 1, wherein a surface of the block corresponding to the lower base of the trapezoid is in contact with the connecting member. In any one of Claim 1 to 3,
A block is provided between the pair of steps sandwiched between the connecting members,
The block is a bar-shaped member having a trapezoidal cross section,
The first and second surfaces of the block corresponding to the hypotenuse of the trapezoid are in contact with the step,
A third surface of the block corresponding to the lower base of the trapezoid faces the connecting member and is away from the connecting member;
An internal thread penetrating from the fourth surface of the block corresponding to the upper base of the trapezoid toward the third surface;
The block is provided with a bolt that penetrates the female screw and contacts the connecting member,
A joint structure characterized in that a recess is provided on a surface of the connecting member so that a tip of a bolt penetrating the female screw is received.   In a passenger conveyor that loads passengers on a circulating transport body and transports the passengers from the entrance to the exit, a lower string on which a tensile load acts among the joints of the main frame that is a structure that supports the passenger conveyor A passenger conveyor having a joint structure according to any one of claims 1 to 5 in a joint of materials. A passenger conveyor installation method for installing the passenger conveyor according to claim 6,
By applying a load for lifting one and the other of the divided main frames upward, the lower chord members of the one and the other main frames are brought close to each other, the connecting member is inserted, and the lifting load is released. The lower chord members of the one and the other main frames are separated from each other, a tensile load is applied to the lower chord member, and the connecting member is engaged with the step and fixed. .