JP2012031873A - Intermeshing chain type reciprocal operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a disengaged intermeshing chain from entangled in a drive sprocket, to avoid increase in noise of the intermeshing chain as well as abnormal travel, and to reduce working load required for maintaining a chain track regulation member such as a guide edge.SOLUTION: An intermeshing chain type reciprocal operation device 100 includes a chain track regulation member 150 that contains a comb-like intermeshing chain regulation structure 151 including an inside chain unit regulation part 151A that extends from a disengaging direction D2 of an intermeshing chain 110 to an inter-drive sprockets region R as well as a pair of outside chain unit regulation parts 151B and 151B.

Description

  The present invention relates to a meshing chain type advance / retreat operation device that is used for manufacturing equipment in various manufacturing fields, transport equipment in the transport field, nursing care equipment in the medical and welfare field, stage equipment in the art field, etc. .

2. Description of the Related Art Conventionally, as a meshing chain type advance / retreat operation device, there is a pair of meshing chains that are meshed with each other and driven integrally, that is, a meshing chain type lifting device that moves a driven object such as a heavy object using a chuck chain. .
In such a conventional meshing chain type lifting device, the engagement of the meshing chain to the drive sprocket is avoided by a guide edge that regulates the meshing chains disengaged from each other (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-278797 (see paragraph [0026], FIG. 4)

However, in the above-described conventional meshing chain type lifting device, the meshing chain is regulated by the guide edge installed only on one side of the plate-shaped storage guide portion, so that the side of the meshing chain extends along the chain width direction. As a result, a deviation occurs in the contact area of the guide edge with respect to the side surface of the meshing chain, and the traveling track of the meshing chain is distorted. There was a problem that it was difficult to avoid.
Further, in the conventional meshing chain type lifting device described above, the guide edge is fixedly installed on both surfaces of the plurality of storage guide portions arranged in parallel in the chain width direction, and the contact area of the guide edge is in contact with the meshing chain. When trying to avoid uneven wear, guide edges are placed between the storage guides, so the guide edges are maintained by disassembling the storage guides and then removing the guide edges from the storage guides. In addition, if a shaft support member that supports the drive sprocket shaft is installed around the rigid position of the pair of meshing chains, it is necessary to remove the shaft support member. Maintenance maintainer that requires a lot of work to maintain the guide edge due to the trouble of disassembling the equipment. There was a nasty problem on the nest.

  Therefore, the technical problem to be solved by the present invention, that is, the object of the present invention is to prevent the meshing chains that have been disengaged from each other from branching into the drive sprocket, and to increase the noise of the meshing chain and cause abnormal running It is another object of the present invention to provide a meshing chain type advance / retreat operation device that avoids the above-mentioned problem and reduces the work load required for maintenance of a chain track regulating member such as a guide edge.

  First, the meshing chain type advance / retreat operation device according to the first aspect of the present invention has a plurality of chain units that are arranged in parallel in the chain width direction and connected to each other, and are integrally engaged with each other. And a pair of meshing chains that are stiffened to each other and branch off from each other, and arranged in a plurality of virtual planes including the chain units, respectively, and engaged with a plurality of rows of chain units to drive the meshing chains. A plurality of drive sprockets, a transport object support attached to one end of the meshing chain and driven to advance and retreat in accordance with the forward and backward movement of the meshing chain, and a plurality of drives provided in the plurality of virtual planes, respectively. Each chain unit consists of multiple rows of chain units that form a meshing chain that branches off the sprocket. A plurality of chain storage guide plates for guiding the storage guide, and a shaft support member for supporting the drive sprocket shaft or a chain storage guide plate are detachably installed, and are separated from the plurality of drive sprockets and branched. A chain trajectory regulating member that regulates the operation of the chain unit from the side surface side of the meshing chain and guides the chain unit to the chain storage guide, wherein the chain trajectory regulating member includes the chain trajectory regulating member, Inner chain unit restricting portion extending from the disengagement direction of the meshing chain that disengages from the drive sprocket to the region between the drive sprockets that mutually separates the drive sprockets adjacent to each other along the chain width direction among the plurality of drive sprockets And along the chain width direction By having a comb-like interlocking chain regulation structure including a pair of outer chain unit regulating portion disposed on the outside of a plurality of driving sprockets is obtained by solving the problems described above.

  The invention according to claim 2 is the meshing chain type advance / retreat operation device according to claim 1, in which the respective leading end portions of the inner chain unit restricting portion and the outer chain unit restricting portion are chain units as viewed from the leading end portion. The above-described problems are further solved by the chamfering on the side facing each other.

  The invention according to claim 3 is the meshing chain type advance / retreat operation device according to claim 1 or claim 2, wherein each of the front end portions of the inner chain unit restricting portion and the outer chain unit restricting portion has the tip portion. The above-described problems are further solved by the chamfering on the side facing the rotation axis of the drive sprocket.

  The interlocking chain type advance / retreat operation device according to claim 1 of the present invention includes a plurality of chain units arranged in parallel in the chain width direction and connected to each other, and is integrally rigid in a state of being engaged with each other and facing each other. And a plurality of meshing chains that are arranged in a plurality of virtual planes each including a chain unit and that engage with a plurality of rows of chain units to drive the meshing chains. A drive sprocket, a transport object support attached to one end of the meshing chain and driven to advance and retreat according to the forward and backward movement of the meshing chain, and provided in each of a plurality of virtual planes and disengaged from the plurality of drive sprockets Guide the multiple rows of chain units that make up the branched mesh chain to the chain storage guide. Side surface side of a plurality of chain storage guide plates and a mesh chain that is detachably installed on a shaft support member or a chain storage guide plate that supports the drive sprocket shaft and branches off from the plurality of drive sprockets To prevent the meshing chain that has been disengaged from each other and branched off from being caught in the drive sprocket by providing a chain track regulating member that regulates the operation of the chain unit and guides the chain unit to the chain storage guide. In addition, it is possible to achieve special effects corresponding to the following unique configurations.

That is, the meshing chain type advance / retreat operation device according to the first aspect of the present invention is configured such that the chain trajectory regulating member moves along the chain width direction of the plurality of drive sprockets from the meshing direction of the meshing chain that is separated from the driving sprocket and branches. Comb teeth including an inner chain unit restricting portion extending in a region between the drive sprockets separating adjacent drive sprockets from each other and a pair of outer chain unit restricting portions arranged outside the plurality of drive sprockets along the chain width direction The mesh chain is regulated by the inner chain unit regulating portion and the outer chain unit regulating portion from both end regions of the side surfaces of the plurality of chain units along the chain width direction. The chain raceway guide out of the side of the meshing chain The contact region that contacts the member avoids deviation along the chain width direction to avoid distortion of the traveling track of the meshing chain and avoids uneven contact wear on the side surface of the meshing chain, thereby increasing the noise of the meshing chain and Abnormal running can be avoided, and the work load required for the maintenance of the chain track regulating member can be reduced by removing the chain track regulating member in the direction of disengagement of the meshing chain and performing the maintenance of the chain track regulating member. .
More specifically, for example, when the chain trajectory regulating member is detachably installed on the shaft support member, that is, by fixing directly to the shaft support member of the drive sprocket drive shaft, It is possible to perform accurate positioning, and after removing the chain storage guide plate, without disassembling and removing the shaft support member and the drive sprocket, pulling out the chain raceway regulating member in the direction of chain disengagement allows engagement. It is possible to maintain the chain track regulating member while reducing the time and effort for disassembling the entire chain type advance / retreat operation device.

  In addition to the effect produced by the meshing chain type advance / retreat operation device according to claim 1, the meshing chain type advancement / retraction operation device according to claim 2 has the respective tip portions of the inner chain unit regulation part and the outer chain unit regulation part. However, the chamfering of the chain unit at the front end of the inner chain unit restricting portion and the outer chain unit restricting portion, that is, the catching of the meshing chain is avoided by chamfering on the side facing the chain unit as viewed from the tip. Therefore, it is possible to avoid the mesh chain wear and vibration that can be caused by the tip of the inner chain unit regulating portion and the outer chain unit regulating portion being caught on the meshing chain, thereby further avoiding the noise increase and running abnormality of the meshing chain. it can.

  Further, the meshing chain type advance / retreat operation device according to claim 3 has, in addition to the effect exerted by the meshing chain type advance / retreat operation device according to claim 1 or claim 2, an inner chain unit restriction portion and an outer chain unit restriction portion. Each tip portion is chamfered on the side facing the rotation shaft of the drive sprocket as viewed from the tip portion, so that the inner chain unit restriction portion and the position closer to the rotation shaft than when no chamfering is applied. Since the tip of the outer chain unit restricting portion is installed, the meshing chain is regulated from a position close to the branching position of the meshing chains that are separated from each other and branched, effectively preventing the meshing chain from being caught in the drive sprocket. be able to.

The side view of the meshing chain type advance / retreat operation apparatus which concerns on the Example of this invention. The top view of the meshing chain type advance / retreat operation apparatus which concerns on a present Example. The partial perspective view of the meshing chain type advance / retreat operation apparatus which concerns on a present Example. The expansion side view of the meshing chain type advance / retreat operation device concerning this example. Sectional drawing which expanded partially the meshing chain type | formula advance / retreat operation apparatus which concerns on a present Example. A partially enlarged view of the meshing chain. The partial cross section figure of a meshing chain.

The interlocking chain type advance / retreat operation device of the present invention has a plurality of chain units arranged in parallel in the chain width direction and connected to each other. A plurality of drive sprockets and meshing chains that are arranged in a plurality of virtual planes each including a pair of meshing chains and a chain unit that diverge and branch, and that engage with a plurality of rows of chain units to drive the meshing chains. A carrier support unit that is attached to one end of the cylinder and is driven to advance and retreat in accordance with the advancing and retreating operation of the meshing chain, and a meshing chain that is provided in each of a plurality of virtual planes and is separated from the plurality of drive sprockets and branches. Multiple chain storage that guides the multiple rows of chain units that make up the chain to the chain storage guide. The chain unit is operated from the side of the meshing chain that is detachably installed on the shaft support member or the chain storage guide plate that supports the guide plate and the drive sprocket shaft, and is branched from the drive sprocket. A chain raceway regulating member that regulates and guides the chain unit to the chain storage guide, and the chain raceway regulating member is engaged with the chain width direction of the plurality of drive sprockets from the disengagement direction of the meshing chain that is disengaged from the drive sprocket and branches. An inner chain unit restricting portion extending in a region between the drive sprockets separating adjacent drive sprockets from each other and a pair of outer chain unit restricting portions disposed outside the plurality of drive sprockets along the chain width direction. Comb-toothed chain It has a control structure and avoids the meshing chains that have been disengaged from each other from branching into the drive sprocket, while avoiding increased noise and running abnormalities in the meshing chain, as well as reducing the work burden required for maintenance of the chain track regulating member. As long as it is mitigated, any specific embodiment may be used.
In the present invention, “the direction of disengagement” means the direction in which one of the pair of meshing chains that are disengaged and branched from each other travels toward the chain storage guide. The chain trajectory restricting member arranged corresponding to is extended from the direction of disengagement of one meshing chain to be regulated to the region between the drive sprockets.

Therefore, in the meshing chain type advance / retreat operation device of the present invention, the chain units constituting the meshing chain may be arranged in a plurality of rows in the chain width direction, for example, two rows may be arranged in parallel. As described above, they may be arranged in parallel.
That is, when the chain units are arranged in two rows in parallel, the chain track regulating member is arranged between the drive sprockets that separate the two drive sprockets arranged in parallel in each of two virtual planes including the chain units. The meshing chain can be regulated by having one inner chain unit regulating part extending in the region.
Further, when the chain units are arranged in parallel in three or more rows, the chain track regulating member is adjacent to the three or more drive sprockets arranged in parallel in each of the three or more virtual planes including the chain units. The meshing chain can be restricted by having two or more inner chain unit restricting portions extending in each region between the drive sprockets that separate the drive sprockets from each other.

The chain track regulating member may be directly installed and fixed on the chain storage guide plate, or may be indirectly fixed and installed via a fixing member fixed and installed on the chain storage guide plate.
Further, the chamfered shape in which the tip portions of the inner chain unit restricting portion and the outer chain unit restricting portion are chamfered may be a planar shape that intersects at an acute angle with respect to the disengagement direction of the meshing chain, It may be curved.
Further, the chain raceway regulating member may be detachably fixedly installed on a shaft support member that protects the interlocking gear and the drive gear on the outside thereof and supports the drive shaft of the drive sprocket.

  Further, the meshing chain type advance / retreat operation device of the present invention has no problem in the advance / retreat operation even if the installation surface is a floor surface in a stationary installation form or a ceiling surface in a suspended installation form. Even if it is a vertical wall surface in a cantilever support form, there is no problem in the above-described advance / retreat operation.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A meshing chain type advance / retreat operation device 100 according to an embodiment of the present invention will be described below with reference to FIGS.
Here, FIG. 1 is a side view of a meshing chain type advance / retreat operation device according to an embodiment of the present invention, FIG. 2 is a plan view of the meshing chain type advance / retreat operation device according to this embodiment, and FIG. FIG. 4 is a partial perspective view of the meshing chain type advance / retreat operation device according to the present embodiment, FIG. 4 is an enlarged side view of the meshing chain type advancement / retraction operation device according to the present embodiment, and FIG. FIG. 6 is a partially enlarged view of the meshing chain type advance / retreat operation device, FIG. 6 is a partially enlarged view of the meshing chain, and FIG. 7 is a partially sectional view of the meshing chain.
In FIG. 3, the illustration of the meshing chain is omitted for the sake of convenience in order to clarify the configuration of the chain track regulating member 150.

  First, the interlocking chain type advance / retreat operation device 100 according to this embodiment shown in FIG. 1 is installed in a stationary state on a work floor, and transports a lift table or the like on which a driven object (not shown) such as a heavy object is mounted. The object support part 130 is moved up and down in parallel to the installation surface G.

As shown in FIGS. 1 to 7, the meshing chain type advance / retreat operation device 100 of the present embodiment includes a plurality of chain units 111 arranged in parallel in the chain width direction W and connected to each other. A plurality of rows are arranged in a plurality of virtual planes S1 and S2 each including a pair of meshing chains 110 that are stiffened integrally in a state of meshing and facing each other and that are separated from each other and branch, and a chain unit 111, respectively. A plurality of drive sprockets 120 that engage with the chain unit 111 to drive the meshing chain 110, a transport object support unit 130 that is attached to one end of the meshing chain 110 and is driven forward and backward according to the forward and backward movement of the meshing chain 110; A plurality of drive sprockets 12 are provided in the plurality of virtual planes S1 and S2, respectively. A plurality of chain storage guide plates 140 for guiding the plurality of rows of chain units 111 constituting the meshing chain 110 that is separated from the chain storage guide 141 to the chain storage guide 141, and the chain storage guide plate 140 are detachably installed. And a chain track regulating member 150 that regulates the operation of the chain unit 111 from the side surface of the meshing chain 110 that is branched off from the plurality of drive sprockets 120 and guides the chain unit 111 to the chain storage guide 141. ing.
As a result, the meshing chains 110 and 110 that are branched off from each other are prevented from being caught in the drive sprockets 120 and 120.

That is, in the meshing chain lifting device 100 of the present embodiment, as shown in FIGS. 6 and 7, each of the plurality of rows of chain units 111 constituting the meshing chain 110 is arranged in parallel in the chain width direction W as a pair of left and right. And a pair of internal tooth plates 111A formed by press-fitting a pair of front and rear bushes 111B, and an intermediate tooth plate 111C arranged in the chain width direction W. The pair of internal tooth plates 111A is in the chain width direction. A large number of front and rear connecting pins 111E that are press-fitted into a pair of front and rear pin holes of the external tooth plate 111D arranged on the outermost side of W are connected in the longitudinal direction of the chain.
A roller 111F is fitted on the outer periphery of the bush 111B.

In the present embodiment, a pair of inner tooth plates 111A constituting the inner link unit are arranged in parallel in the chain width direction W, whereby an inner tooth plate 111A and an intermediate tooth plate 111C constituting one of the pair of meshing chains 110 and 110 are arranged. And the external tooth plate 111D, respectively, over the double rows in the chain width direction W with respect to the internal tooth plate 111A, the intermediate tooth plate 111C, and the external tooth plate 111D constituting the other meshing chain 110 opposite to each other. Multiple hooks and so-called chucks are engaged in a multiple and firm manner.
Therefore, buckling that tends to occur in the chain width direction W of the meshing chain 110 is reliably suppressed, and the meshing balance with the drive sprocket 120 in the chain width direction W is improved.

  As shown in FIGS. 1 to 7, the pair of meshing chains 110 are arranged in parallel in the chain width direction W to mesh with the above-described bush 111B and are supplied via the driving motor M and the driving gear F. A pair of drive sprockets 120, 120 driven together with the connecting gears E, E around the rotating shaft 120A by force is arranged opposite to each other and deflected from the horizontal direction to the vertical direction, that is, from the disengagement direction D2 to the rigid direction D1. The inner tooth plates 111A, the intermediate tooth plates 111C, the outer tooth plates 111D, which are opposed to each other, and the outer tooth plates 111D are shifted by a half pitch in the chain longitudinal direction, the hook portions of the inner tooth plate 111A, the hook portions of the intermediate tooth plate 111C, At the same time as engaging the hook parts of the external tooth plate 111D, While the rates 111A, the intermediate tooth plates 111C, and the external tooth plates 111D are brought into contact with each other, the internal tooth plates 111A and the external tooth plates 111D that are engaged with each other are moved from the vertical direction to the horizontal direction by the pair of drive sprockets 120. That is, the internal tooth plates 111A and the external tooth plates 111D are released from contact with each other by releasing the contact between the internal tooth plates 111A and the external tooth plates 111D by shifting from the rigid direction D1 to the disengagement direction D2, and between the external tooth plates 111D. Are respectively configured to be branched off.

Next, a specific form of the chain raceway regulating member 150, which is the most characteristic of the above-described meshing chain type advance / retreat operation device 100 of this embodiment, will be described in detail with reference to FIGS.
In the meshing chain type advance / retreat operation device 100 according to the present embodiment, as shown in FIGS. 1 to 5, a plurality of chain trajectory regulating members 150 from the meshing direction D <b> 2 of the meshing chain 110 that branches off from the drive sprocket 120. Drive sprocket 120 of FIG. 1 and a plurality of drives along chain width direction W and inner chain unit restricting portion 151A extending to drive sprocket region R separating drive sprockets 120, 120 adjacent to each other along chain width direction W. It has a comb-like meshing chain regulating structure 151 including a pair of outer chain unit regulating portions 151B and 151B arranged outside the sprocket 120.

Thus, the meshing chain 110 is regulated by the inner chain unit regulating portion 151A and the outer chain unit regulating portion 151B from both end regions of the plurality of chain units 111 along the chain width direction W, and the chain of the side surfaces of the meshing chain 110 is restricted. The contact region that contacts the track regulating member 150 is avoided from being biased along the chain width direction W to avoid distortion of the traveling track of the meshing chain 110 and to avoid contact wear bias on the side surface of the meshing chain 110.
For this reason, the meshing chain type advance / retreat operation device 100 avoids an increase in noise of the meshing chain 110 and traveling abnormality, and also removes the chain track regulating member 150 in the meshing direction D2 of the meshing chain 110 to maintain the chain track regulating member 150. By doing so, the work load required for the maintenance of the chain track regulating member 150 is reduced.

More specifically, the chain track regulating member 150 is fixedly installed on the chain storage plate 140 via the L-shaped fixing member C, and is detachable by being pulled out in the biting-off direction D2.
As a result, since the chain track regulating member 150 is pulled out in the biting direction D2 and removed without separating the plurality of chain storage guide plates 140 from each other and replacing the chain track regulating member 150, the meshed chain type advance / retreat operation device 100 reduces the work load required for the maintenance of the chain track regulating member 150.
Further, when the chain track regulating member 150 is detachably fixedly installed on the shaft support member 160, the shaft support member 160 and the drive sprocket 120 are not disassembled and removed after removing the chain storage guide plate 140. By pulling out the chain trajectory regulating member 150 in the chain engagement / disengagement direction D2, the meshing chain type advance / retreat operating device 100 maintains the chain trajectory regulating member 150 by reducing the trouble of disassembling the entire meshing chain type advance / retreat operating device 100. It is like that.

Further, as shown in FIGS. 4 and 5, the front end portions 152A and 152B of the inner chain unit restricting portion 151A and the outer chain unit restricting portion 151B are on the side facing the chain unit 111 when viewed from the front end portions 152A and 152B. Each is chamfered.
This prevents the engagement chain 110 from being caught at the end portions 152A and 152B of the inner chain unit restriction portion 151A and the outer chain unit restriction portion 151B, so that the engagement chain type advance / retreat operation device 100 includes the inner chain unit restriction portion 151A and The wear and vibration of the meshing chain 110 that may be caused by the end portions 152A and 152B of the outer chain unit restricting portion 151B being caught by the meshing chain 110 are avoided, and noise increase and running abnormality of the meshing chain 110 are further avoided. ing.

Further, the front end portions 152A and 152B of the inner chain unit restricting portion 151A and the outer chain unit restricting portion 151B are chamfered on the side facing the rotation shaft 120A of the drive sprocket 120 as viewed from the front end portions 152A and 152B.
Accordingly, the inner chain unit restricting portion 151B and the outer chain unit restricting portion 151B are moved to a position close to the rotating shaft 120A without contacting the boss portion 120B constituting a part of the drive sprocket 120 as compared with the case where chamfering is not performed. Since the end portions 152A and 152B of the meshing chain type are installed, the meshing chain type advance / retreat operation device 100 regulates the meshing chain 110 from the position close to the branching position of the meshing chain 110 that is branched off after being mutually meshed. Thus, the engagement of the meshing chain 110 with the drive sprocket 120 is effectively avoided.

  In the meshing chain type advance / retreat operation device 100 of the present embodiment obtained in this way, the chain trajectory regulating member 150 is separated from the driving sprocket 120 and branches from the meshing direction D2 of the meshing chain 110 that branches. Out of the plurality of drive sprockets 120 along the chain width direction W and the inner chain unit restricting portion 151 </ b> A extending to the region R between the drive sprockets separating the adjacent drive sprockets 120 along the chain width direction W. By having the comb-like meshing chain regulating structure 151 including the pair of outer chain unit regulating portions 151B and 151B, the meshing chains 110 and 110 that are separated from each other and branched are driven sprockets 120 and 120, respectively. And avoid being caught in The chain raceway restriction member 150 is maintained by removing the chain raceway restriction member 150 in the engagement direction D2 of the meshing chain 110 and performing maintenance of the chain raceway restriction member 150 while avoiding noise increase and running abnormality of the joint chain 110. The effect is enormous, such as reducing the work load required.

DESCRIPTION OF SYMBOLS 100 ... Meshing chain type advance / retreat operation device 110 ... Meshing chain 111 ... Chain unit 111A ... Internal tooth plate 111B ... Bush 111C ... Intermediate tooth plate 111D ... External tooth plate 111E ··· Connecting pin 111F ··· Roller 120 ··· Drive sprocket 120A ··· Drive shaft 120B ··· Boss portion 130 ··· Transported material support portion 140 ··· Chain storage guide plate 141 ··· Chain storage guide 150... Chain trajectory regulating member 151... Comb-like meshing chain regulating structure 151 A... Inner chain unit regulating portion 151 B... Outer chain unit regulating portion 152 A, 152 B. The drive sprocket shaft of the meshing chain Supporting shaft support member C ... L-shaped fixing member D1 ... Mesh chain rigidity direction D2 ... Mesh chain engagement direction E ... Interlocking gear F ... Drive gear G ... Installation surface M・ ・ ・ Drive motor W ・ ・ ・ Chain width direction

Claims (3)

A pair of meshing chains that are arranged in parallel in the chain width direction and have a plurality of chain units connected to each other, are rigidly integrated in a state of being meshed with each other and opposed to each other, and are separated from each other and branched; A plurality of drive sprockets disposed in a plurality of virtual planes each including the chain unit and engaged with a plurality of rows of chain units to drive a meshing chain; and a meshing chain attached to one end of the meshing chain And a plurality of rows of chains that form a meshing chain that is provided in the plurality of virtual planes and that is separated from the plurality of drive sprockets and branches. Multiple chain storage guide plates each guiding the unit to the chain storage guide and front The chain unit is detachably installed on a shaft support member or a chain storage guide plate that supports the drive sprocket shaft and regulates the operation of the chain unit from the side of the meshing chain that is disengaged from the plurality of drive sprockets and branches. A chain-chain advance / retreat operation device comprising a chain track regulating member that guides the chain unit to the chain storage guide,
In the region between the drive sprockets, the chain raceway regulating member separates the drive sprockets adjacent to each other along the chain width direction among the plurality of drive sprockets from the meshing direction of the meshing chain that is separated from the drive sprocket and branches. A comb-like meshing chain regulating structure including an extending inner chain unit regulating portion and a pair of outer chain unit regulating portions arranged outside the plurality of drive sprockets along the chain width direction. A meshing chain type advance / retreat operation device.   The engagement chain advancing / retreating operation according to claim 1, wherein the front end portions of the inner chain unit restricting portion and the outer chain unit restricting portion are chamfered on the side facing the chain unit as viewed from the front end portion. apparatus.   3. A tip end of each of the inner chain unit restricting portion and the outer chain unit restricting portion is chamfered on the side facing the rotation axis of the drive sprocket as viewed from the tip portion. The interlocking chain advancing / retreating operation device according to claim 1.

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