JP2011051730A - Conveyor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve ride comfort on a footstep by suppressing the local abrasion of a circulating chain for constituting a chain drive mechanism by properly driving a footstep chain while maintaining a deep meshing angle even if driving an ordinary footstep chain by the chain drive mechanism which uses a sprocket. <P>SOLUTION: This conveyor device has the chain drive mechanism for applying thrust to the footstep chain by circularly moving the circulating chain. The circulating chain is constituted by connecting a plurality of chain links 13a for setting the pitch length in the same as or to a multiple of the pitch length of a footstep link of the footstep chain via a hinge. The respective chain links 13a have mounting surfaces 13c for mounting footstep rollers 4b of the footstep chain in linear motion, and a pressing surface 13d contacting with front-rear footstep rollers 4b' and 4b" of the footstep roller 4b on the mounting surface 13c, and the footstep roller 4b contacts with only the mounting surface 13c and the pressing surface 13d. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a conveyor device such as an escalator and a moving sidewalk, and more particularly to a conveyor device that does not generate pulsation in a circulation chain and has a good riding comfort on a step.

  A conveyor device such as an escalator or a moving sidewalk has a structure in which a plurality of steps connected endlessly are circulated and transported from the entrance to the exit. A plurality of steps are equipped with step rollers, and each step circulates between the entrance and exit while maintaining the level by rolling the step rollers on the step guide rails installed in the structure. It is supposed to move. Normally, the plurality of steps are connected by a step chain, and by driving the step chain, all the steps are synchronized and move without generating a gap.

  The step chain described above is driven by a drive mechanism, and this drive mechanism is generally of a type in which the chain end is driven by a sprocket. In general, such a drive mechanism is provided near the entrance or the exit. However, in a conveyor device having a long step moving distance, the burden on the step chain is large, and thus there is a case where a sufficient driving force cannot be transmitted only by the driving mechanism at the end of the chain. Therefore, in a conveyor or the like where the distance of the step is long, the drive mechanism should be placed in the middle of a long chain so that a driving force can be applied in the middle of the long chain (the part other than the end where the chain turns and turns). It has been proposed to disperse the arrangement (see, for example, Patent Documents 1 and 2).

  The driving mechanism that gives driving force in the middle of the chain of such a conveyor device transmits the driving force to a motor as a driving source, a speed reducer that amplifies the driving force by a factor of ten, and a linearly extending step chain. It is common to include a chain driving force transmission mechanism that performs the above-described operation. Here, when a sprocket is used as the chain driving force transmission mechanism, a linear step chain is not wound around the sprocket, so that the meshing rate decreases. Therefore, for example, the chain driving force transmission mechanism as shown in FIGS. 11A and 11B is used.

  That is, as shown in FIGS. 11A and 11B, in the driving force transmission mechanism 100, a step chain connecting the steps 101 is configured as a toothed chain 102 having a long link length, and a circulation having a pin roller 103 is provided. The chain 104 is circulated so that the toothed chain 102 is driven.

  However, when such a toothed chain 102 having a long link length is used as a step chain, speed unevenness occurs at the end of the conveyor device where the toothed chain 102 changes direction and folds as compared to a normal step chain. For this reason, it is difficult to reverse the step 101 using a circular sprocket that rotates at a constant speed. For this reason, when using the toothed chain 102 as a step chain, it is necessary to reverse this toothed chain 102 using a pseudo-arc-shaped guide rail or the like. Therefore, it is difficult to use an inexpensive and standard drive mechanism using a sprocket as the drive mechanism for driving the step chain.

  Thus, as a drive mechanism that applies a driving force in the middle of the conveyor device, a conveyor device that includes a drive mechanism 120 that can drive a commonly used step chain has been proposed (see, for example, Patent Document 3).

  As shown in FIG. 12, the drive mechanism 120 includes a drive sprocket 121, a driven sprocket 122, and a circulation chain 123 wound between these sprockets 121, 122, and a drive source 126 rotates the drive sprocket 121. By being driven, a plurality of chain links 124 provided in the circulation chain 123 mesh with the step roller R of the step chain 125 and apply thrust to the step chain 125 to move the step 128.

  As shown in FIG. 13, the chain link 124 has a continuous concave shape and convex shape along the locus of engagement with the step roller R of the step chain 125. Specifically, the chain link 124 loosely engages with the step roller R. Therefore, the convex portions 124b and 124b provided on the left and right sides of the concave portion 124a are formed in an arc shape having a large radius.

Japanese Utility Model Publication No. 47-19989 JP 47-10873 A JP 2003-201084 A

  However, in the conveyor device using the drive mechanism 120 described above, although the meshing operation between the step roller R and the chain link 124 becomes smooth and vibrations and noise that cause discomfort to the passenger can be reduced, the chain link 124 is reduced. Since the convex portions 124b and 124b are set in an arc shape having a large radius, there are the following problems.

  That is, when the step roller R is separated from the chain link 124, the step roller R comes into contact with the convex portion 124b on the rear side in the movement direction of the chain link 124. Therefore, a larger thrust than the chain link 124 is applied to the step roller R. It will be.

  In such a place where the step roller R is separated from the chain link 124 to which a large thrust acts, the chain link 124 moves in an arc by the sprockets 121 and 122 even though the step roller R moves linearly. If the chain link 124 has a continuous concavo-convex shape along the locus of engagement with the step roller R, a large thrust is applied to the step roller R in the arc movement direction of the chain link 124 that is greatly deviated from the movement direction of the step chain 125. As a result, the step roller R and the chain link 124 are easily worn and deteriorated by receiving unnecessary force that does not contribute to the movement of the step chain 125.

  Further, in the moving device 120 described above, since the step roller R contacts the convex portion 124b on the front side in the moving direction of the chain link 124 from the state where the step roller R is separated until it engages with the concave portion 124a of the chain link 124, the chain link No thrust is applied from 124 to the step roller R. That is, the thrust that contributes to the movement of the step chain 125 is applied from the chain link 124 to the step roller R when the chain link 124 moves linearly along the direction of movement of the step roller R.

  However, since the step roller R comes into contact with the recess 124a only when the chain link 124 moves linearly, the chain link 124 cannot maintain a deep engagement with the step roller R, and the thrust along the moving direction of the step chain 125 Is difficult to apply to the step roller R.

  The present invention has been made to solve the above-described problems. In a conveyor apparatus having a driving mechanism that applies a driving force in the middle of the conveyor apparatus, a normal step is achieved while realizing a sufficient meshing angle. To provide a conveyor device that can give a driving force to the chain, and that prevents unnecessary force from being applied to the step roller and suppresses the wear of the step roller and the chain link to provide a comfortable ride on the step. With the goal.

  A conveyor device according to the present invention includes a step guide rail, a plurality of steps moving along the step guide rail, a plurality of step rollers rolling on the step guide rail, and a plurality of steps disposed between the step rollers. A step chain in which a predetermined number of step rollers among the plurality of step rollers are respectively engaged with the plurality of steps to connect the plurality of steps, a rotation drive device, A driving sprocket that turns by receiving the driving force of the rotational driving device, and a circulation that is disposed between the driving sprocket and the step chain and that circulates according to the rotational motion of the driving sprocket and applies thrust to the step chain. A chain drive mechanism having a chain, and the circulation chain of the chain drive mechanism has a pitch length of the step link. A plurality of chain links that are the same as or multiples of, and a hinge that serves as a joint of the chain links, and each chain link of the circulation chain has a mounting surface on which the step rollers are mounted during linear motion And a pressing surface that contacts the step rollers before and after the step roller on the mounting surface, and the step roller contacts only at the mounting surface and the pressing surface.

  In the conveyor device according to the present invention, with the above configuration, the step chain can be appropriately driven while maintaining a deep engagement angle by the circulation chain of the chain drive mechanism, and the circulation chain and the step chain constituting the chain drive mechanism It is possible to suppress local wear of the step rollers provided in the vehicle and to improve the riding comfort on the steps.

It is a side view which shows the conveyor apparatus which concerns on one Embodiment of this invention. It is a side view which shows the chain drive mechanism of the conveyor apparatus which concerns on one Embodiment of this invention. It is a figure which shows the circulation chain with which the chain drive mechanism of the conveyor apparatus which concerns on one Embodiment of this invention is equipped, Comprising: (a) is a top view which decomposes | disassembles and shows a part of circulation chain, (b) A part of circulation chain FIG. It is a side view of the chain link of the chain drive mechanism of the conveyor apparatus which concerns on one Embodiment of this invention. It is a principal part enlarged view of FIG. It is a side view of the drive sprocket (driven sprocket) of the chain drive mechanism of the conveyor apparatus which concerns on one Embodiment of this invention. It is a principal part enlarged view of FIG. It is a top view which shows the chain drive mechanism of the conveyor apparatus which concerns on one Embodiment of this invention. It is front sectional drawing which shows the chain drive mechanism of the conveyor apparatus which concerns on one Embodiment of this invention. It is front sectional drawing which shows the circulation chain vicinity of the chain drive mechanism of the conveyor apparatus which concerns on one Embodiment of this invention. It is a figure which shows the conveyor apparatus which concerns on a prior art example. It is a figure which expands and shows the principal part of the conveyor apparatus which concerns on another prior art example. It is a figure which shows the chain link in the conveyor apparatus of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a conveyor device 1 according to the present embodiment connects a step guide rail 3 attached to a structure 2, a plurality of steps 5 that move along the step guide rail 3, and a plurality of steps 5. A step chain 4 and a chain drive mechanism 10 for driving the step chain 4.

  Of these, the step chain 4 has a plurality of step links 4a and a plurality of step rollers 4b, as shown in FIG. The step roller 4 b is a roller that rolls on the step guide rail 3. The step links 4a are respectively disposed between adjacent step rollers 4b. The step chain 4 connects the plurality of steps 5 by engaging a plurality of step rollers arranged at a predetermined number of the plurality of step rollers 4b with the plurality of steps 5, respectively.

  Further, as shown in FIG. 2A, the chain drive mechanism 10 includes a rotation drive device 11, a drive sprocket 12 connected to the rotation drive device 11 and turning by receiving the drive force of the rotation drive device 11, It has a driven sprocket 15 that makes a pair with the drive sprocket 12 and swivels together with the drive sprocket 12, and a circulation chain 13 that spans from the drive sprocket 12 to the driven sprocket 15 and circulates. The circulation chain 13 is disposed between the drive sprocket 12 and the driven sprocket 15 and the step chain 4, and circulates according to the rotational movement of the drive sprocket 12 and the driven sprocket 15 to give thrust to the step chain 4.

  Furthermore, the circulation chain 13 has a plurality of chain links 13a and hinges 13b that serve as joints between adjacent chain links 13a, and the pitch length of the chain links 13a is the same as the pitch length of the step links 4a. It has become. The pitch length of the chain link 13a may be a multiple (for example, twice) of the pitch length of the step link 4a.

  As shown in FIG. 3, the plurality of chain links 13a are overlapped at the position of the hinge 13b with the ends of the adjacent chain links 13a and 13a ′, and are rotatably connected around the hinge 13b. Chain links 13 a and 13 a ′ are connected in a zigzag manner to form a circulation chain 13. The circulation chain 13 includes an auxiliary link 13f arranged in parallel so as to overlap with one of the adjacent chain links 13a and 13a '. The auxiliary link 13f is formed in a simple strip shape with rounded rectangular ends, and both ends are coaxially connected to the ends of the chain links 13a and 13a ′ at the position of the hinge 13b, and cantilevered at the hinge 13b. The durability is improved as a configuration in which the bending moment due to is not generated.

  In the circulation chain 13, the number of links of the chain link 13a is a predetermined number that is the arrangement cycle of the step rollers 4b engaged with the steps 5 of the step chain 4, that is, among the plurality of step rollers 4b of the step chain 4. The number is different from a multiple of n in the case where every n rollers are engaged with the step 5. Specifically, in the example shown in FIG. 2A, the rollers arranged for every three of the step rollers 4b are engaged with the step 5, and the number of links of the chain links 13a of the circulation chain 13 is The number is 22 which is one more than 21 which is a multiple of 3.

  As shown in FIG. 2A, a chain roller 13e is attached to each hinge 13b of the circulation chain 13 so as to be rotatable coaxially with each hinge 13b. A circulation rail 14 is provided in the circulation path of the circulation chain 13 to guide the circulation movement of the circulation chain 13 by rolling the chain roller 13e. The circulation rail 14 has a path having a pair of arc portions 14a, 14a and a pair of straight portions 14b, 14b, and smoothly connects the arc portions 14a and the straight portions 14b to vibrate the circulation chain 13. An inclined surface 14c is interposed as a connecting portion for preventing (see FIG. 2B).

  The circulation chain 13 is guided by the circulation rail 14 so that the chain link 13a performs an arc motion in the arc portion 14a, performs a linear motion in the linear portion 14b, and has a shape of the inclined surface 14c in the inclined surface 14c. Perform the curve motion according to the response.

  The chain link 13a includes a mounting surface 13c on which the step roller 4b is mounted and a step roller 4b before and after the step roller 4b on the mounting surface 13c during the linear motion that travels on the linear portions 14b and 14b of the circulation rail 14 described above. It has pressing surfaces 13d and 13d before and after contacting with '4b' '(left and right in FIG. 2).

  The chain link 13a contacts the step rollers 4b 'and 4b' 'only at the mounting surface 13c and the pressing surfaces 13d and 13d, and is curved during an arc motion and travels along the arc portion 14a and the inclined surface 14c of the circulation rail 14. The shape of the chain link 13a is set so as not to contact the step rollers 4b ′ and 4b ″ during movement.

  Specifically, the mounting surface 13c of the chain link 13a is a concave curved surface that follows the shape of the peripheral surface of the step roller 4b. While the chain link 13a is moving linearly, the step roller 4b is placed on the mounting surface 13c. Installed.

  Further, the outer peripheral portion of the chain link 13a opposite to the mounting surface 13c (the outer peripheral portion located inside when circulating and moving) has a convex shape that meshes with the drive sprocket 12 and the driven sprocket 15. In other words, the chain link 13a has a U-shaped appearance as a whole, and bypasses the step roller 4b with the step roller 4b mounted on the mounting surface 13c (the circumference of the step roller 4b on the mounting surface 13c). It escapes along the surface).

  The step rollers 4b ′ and 4b before and after the step roller 4b on the mounting surface 13c while the chain link 13a performs a linear motion on the pressing surfaces 13d and 13d provided on both of the U-shaped tip portions. '' Is pressed. Accordingly, each step roller 4b of the step chain 4 continues during the linear motion of the chain link 13a and is mounted on the mounting surface 13c of one chain link 13a of the circulation chain 13 in the front and rear direction of the chain link 13a. The chain link 13a is sandwiched by the pressing surface 13d and held on the mounting surface 13c, whereby the mounting surface 13c and the pressing surfaces 13d and 13d move the chain link 13a while maintaining a deep engagement angle. The step roller 4b is pressed in the direction, and thrust is applied to the step chain 4.

  The pressing surfaces 13d and 13d of the chain link 13a described above have a thickness in the plate thickness direction of the chain link 13a so that the step roller 4b can be effectively pressed in an area larger than the area corresponding to the plate thickness of the chain link 13a. Increased configuration. And in this Embodiment, such pressing surfaces 13d and 13d are formed using the member 13g different from the board | plate material which comprises the chain link 13a. That is, as shown in FIG. 3, another member 13g is arranged at the end of the plate member constituting the chain link 13a so as to sandwich the plate member from both sides in the plate thickness direction, and the plate member and the separate member 13g are cross-sectioned. The pressing surfaces 13d and 13d are formed at the end of the chain link 13a by joining and integrating by caulking using a square pin 13h having a square shape.

  As a method for forming the pressing surfaces 13d and 13d, in addition to a method of joining another member 13g by caulking using a pin 13h, for example, another member 13g is joined and integrated to the chain links 13a and 13a by welding. Also good.

  4 and 5 show a part of the trajectory of the step roller 4b when the chain link 13a is performing the arc motion and the curve motion while the chain link 13a is used as a reference. When the chain link 13a is switched from linear motion to curvilinear motion and arc motion, the step roller 4b mounted on the mounting surface 13c during the linear motion moves along the locus la and is a step roller (pressed by the pressing surfaces 13d and 13d ( The step roller 4b ′ in front of the step roller 4b on the mounting surface 13c moves along the locus lb. Therefore, the chain link 13a is provided with an escape portion 13i with respect to the locus la of the step roller 4b, and with an escape portion 13j with respect to the locus lb of the step roller 4b ′, so that the step roller 4b is in a curved motion and an arc motion. The shape is set so as not to contact 4b ′.

  Further, as shown in FIG. 2A, a driven sprocket 15 that makes a pair with the drive sprocket 12 is provided on one arc portion 14 a of the circulation rail 14.

  The drive sprocket 12 and the driven sprocket 15 are configured by overlapping a plurality of (two in the present embodiment) plate teeth 12a and 15a each having substantially the same thickness as the chain link 13a. A tooth groove that engages with the outer periphery of the chain link 13a is formed. Then, one of the adjacent chain links 13a and the other of the adjacent chain links 13a are configured to sequentially engage with the tooth grooves of the corresponding plate teeth 12a and 15a, respectively.

  Further, the drive sprocket 12 and the driven sprocket 15 have their respective plate teeth 12a as shown in FIGS. 6 and 7 at the intersections where the tooth teeth 12a (15a) intersect with each other. The common hole 34 is formed so as to penetrate continuously in the thickness direction of (15a), and the cushioning material 35 is embedded in the common hole 34, that is, in all the plate teeth 12a (15a). Yes. The cushioning material 35 has a cylindrical shape with a hollow portion 35a extending in the thickness direction of the plate teeth 12a (15a), and the cushioning material 35 embedded in the common hole 34 is embedded in the cushioning material 35. A gap 34 a is provided between the common hole 34.

When the chain link 13a of the circulation chain 13 is engaged with the tooth groove, the cushioning material 35 is
It is intended to smooth the bite by being crushed. With such a configuration, the hollow portion 35a and the gap 34a can be made to function as a bending allowance of the cushioning material 35 that is crushed and elastically deformed, and the elasticity of the cushioning material 35 can be adjusted to an appropriate one with a simple configuration. it can. In addition, in this embodiment, while providing the hollow part 35a in the shock absorbing material 35 and providing the clearance gap 34a between the shock absorbing material 35 and the common hole 34, only one of the hollow part 35a and the clearance gap 34a is provided. Also good.

  The driven sprocket 15 is connected to a handrail belt driving device 16 that drives the handrail belt. That is, a connecting mechanism 16a that transmits the driving force from the shaft 15b of the driven sprocket 15 is provided between the driven sprocket 15 and the handrail belt driving device 16, and the driven sprocket 15 is connected via the connecting mechanism 16a. Driving force is transmitted to the handrail belt driving device 16 and is sandwiched by a plurality of rollers by the handrail belt driving device 16 to drive a handrail belt (not shown).

  As shown in FIG. 8, a driving force may be obtained from the shaft 15b of the driven sprocket 15 and the handrail belt may be directly driven by the large diameter roller 16b of the handrail belt driving device 16.

  As shown in FIGS. 8 and 9, the rotary drive device 11 includes a drive motor 11a, a transmission mechanism 11b including a belt that transmits the rotational torque of the drive motor 11a to the left and right drive sprockets 12, and each drive sprocket. 12, a reduction gear 11c that amplifies the rotational torque transmitted by the transmission mechanism 11b. The brake 11d is attached to the input shaft 11e of the speed reducer 11c, not the drive motor 11a.

  Furthermore, as shown in FIG. 10, the chain roller 13e is disposed in a pair so as to sandwich the chain link 13a from both sides in the thickness direction (left and right in FIG. 10), and the chain roller 13e is circulated. The rails 14 are arranged on both sides (left and right in FIG. 10) in the thickness direction of the chain link 13a corresponding to the arrangement of the chain link 13a. Also, as shown in FIG. 10, when viewed along the traveling direction of the chain roller 13e (direction perpendicular to the paper surface of FIG. 10), one chain roller 13e ' The other chain roller 13e '' is disposed at a position away from the projection surface of the step chain 4 so as not to overlap the projection surface of the step chain 4.

  As described above, according to the conveyor device of the present embodiment, the chain link 13a has the pressing surfaces 13d and 13d that contact the step rollers 4b ′ and 4b ″ before and after the step roller 4b. Even when the step chain 4 is driven, a driving force can be applied while maintaining a deep engagement. As a result, the step roller 4b does not float and there is no need to provide a mechanism for preventing the lifting. Further, even if a mechanism for preventing lifting is provided for safety, it may be light.

  Further, the hinge 13b of the circulation chain 13 is disposed between the step rollers 4b of the step chain 4 and applies a driving force to the step chain 4 while maintaining a deeper engagement angle. Is further enhanced.

  Furthermore, in the chain drive mechanism 10, the circulation rail 14 forms a path having a pair of arc portions 14a, 14a and a pair of linear portions 14b, 14b, and between each arc portion 14a and each linear portion 14b. Since the inclined surface 14c as a connecting portion for preventing the vibration of the circulation chain is interposed, the pulsation in the circulation chain 13 can be eliminated, thereby eliminating the pulsation in the driven step chain 4 and the step. The ride comfort on 5 can be improved.

  Moreover, in the present embodiment, the chain link 13a is provided with relief portions 13i and 13j with respect to the loci la and lb of the step roller 4b, and during the arc motion traveling on the arc portion 14a and the inclined surface 14c of the circulation rail 14. Further, it is provided so as not to contact the step roller 4b during the curved motion. Therefore, the thrust in the curve moving direction and the arc moving direction of the chain link 13a deviating from the moving direction of the step chain 4 is not applied to the step chain 4, and the step roller 4b and the chain link 13a are not easily deteriorated by wear. Durability can be improved.

  Moreover, in the conveyor apparatus of this embodiment, the common hole 34 coaxially is provided in the plate tooth 12a (15a) which the drive sprocket 12 and the driven sprocket 15 accumulated, and the buffer material 35 is embed | buried in this common hole 34. FIG. Therefore, the structure can be made simple and inexpensive, and the biting when the chain link 13a of the circulation chain 13 is engaged with the tooth grooves of the drive sprocket 12 and the driven sprocket 15 can be made smooth. Moreover, since the hollow portion 35a provided in the cushioning material 35 and the gap 34a provided between the cushioning material 35 and the common hole 34 function as a bending allowance of the cushioning material 35 that is crushed and elastically deformed, With such a configuration, the elasticity of the cushioning material 35 can be adjusted to an appropriate value.

  Further, since the pressing surfaces 13d and 13d of the chain link 13a are configured to increase in thickness in the plate thickness direction of the chain link 13a, the step roller 4b can be effectively pressed in a large area, and the step roller The surface pressure applied to 4b decreases. Further, since the pressing surfaces 13d and 13d are formed by joining another member 13g to the end of the plate material constituting the chain link 13a, the pressing surfaces 13d and 13d can be easily maintained while maintaining the required strength. Can be formed. In particular, the separate member 13g is joined and integrated with the plate material constituting the chain link 13a by caulking using a square pin 13h having a square cross-sectional shape, so that the other member 13g is rotated around the axis of the pin 13h by one caulking. Thus, the pressing surfaces 13d and 13d can be easily formed while maintaining the required strength.

DESCRIPTION OF SYMBOLS 1 ... Conveyor apparatus 4 ... Step chain 4a ... Step link 4b ... Step roller 5 ... Step 10 ... Chain drive mechanism 12 ... Drive sprocket 12a ... Plate tooth 13 ... Circulation chain 13a ... Chain link ...
13b ... Hinge 13c ... Mounting surface 13d ... Pressing surface 13e ... Chain roller 13f ... Auxiliary link 13g ... Separate member 13h ... Square pin 13i ... Escape portion 13j ... Escape portion 14 ... Circulating rail 14a ... Arc portion 14b ... Linear portion 14c ... Inclined surface 15 ... driven sprocket 16 ... belt driving device 34 ... common hole 34a ... gap 35 ... cushioning material 35a ... hollow portion la ... step roller locus lb ... step roller locus

Claims (4)

A step guide rail,
A plurality of steps moving along the step guide rail;
A plurality of step rollers rolling on the step guide rail and a plurality of step links arranged between the step rollers, and the step rollers arranged for each predetermined number of the plurality of step rollers are the plurality of step rollers. A step chain that is engaged with each step and connects the plurality of steps;
A rotary drive device, a drive sprocket that turns by receiving the driving force of the rotary drive device, and a rotary sprocket that is disposed between the drive sprocket and the step chain and circulates in accordance with the rotary motion of the drive sprocket, A chain drive mechanism having a circulation chain that gives thrust to
The chain chain of the chain drive mechanism has a plurality of chain links whose pitch length is equal to or a multiple of the pitch length of the step link, and a hinge that serves as a joint between the chain links.
Each chain link of the circulation chain is provided with a mounting surface on which the step roller is mounted and a pressing surface that comes into contact with the step rollers before and after the step roller on the mounting surface during linear motion,
The conveyor device, wherein the step roller contacts only with the mounting surface and the pressing surface.   The conveyor device according to claim 1, wherein the pressing surface is formed by joining another member to an end portion of a plate-like member constituting the chain link.   The drive sprocket has a configuration in which a plurality of plate teeth are overlapped, and a tooth groove that engages with an outer peripheral portion of the chain link of the circulation chain is formed on each plate tooth, and the plurality of plates constituting the drive sprocket A common hole penetrating in the thickness direction is provided at a position where the teeth are intersected with each other in the thickness direction, a buffer material is embedded in the common hole, and a hollow portion is provided inside the buffer material. The conveyor apparatus of Claim 1 or 2 characterized by the above-mentioned.   The drive sprocket has a configuration in which a plurality of plate teeth are overlapped, and a tooth groove that engages with an outer peripheral portion of the chain link of the circulation chain is formed on each plate tooth, and the plurality of plates constituting the drive sprocket A common hole penetrating in the thickness direction is provided at a position where the teeth are intersected with each other in the thickness direction, and a cushioning material is embedded in the common hole, and the cushioning is provided between the shared hole and the cushioning material. The conveyor device according to claim 1, wherein a gap that allows deformation of the material is provided.

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