JP2011153030A - Engaging chain type advancing and retreating actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engaging chain type advancing and retreating actuator, in which an engagement vibration apt to be produced between a pair of engaging chains is avoided so that a stable advancing and retreating motion is achieved owing to smooth engagement and disengagement, a cooperation mechanism between the engaging chain and a driving sprocket is simplified so that a high freedom in device design is ensured, and the work load on device assembling and maintenance is reduced. <P>SOLUTION: A chain guide 190 is provided with a chain guiding surface 191 with the same diameter as the root circle of the driving sprocket 140. The driving sprocket 140 and the chain guide 190 are arranged opposite to each other at the deflection position between the chain engaging direction and the chain diverging direction of the pair of the engaging chains 150, 150, so as to form a bilaterally symmetric track for allowing the pair of the engaging chains 150, 150 to advancing and retreating travel. A chain guide plate 170 is arranged in the crotch region at the deflection position. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a drive device for moving a workpiece forward and backward in parallel to the installation surface for use in manufacturing equipment in various manufacturing fields, transport equipment in the transportation field, nursing care equipment in the medical and welfare field, stage equipment in the art field, etc. In particular, the present invention relates to a meshing chain type advance / retreat operation device employing a meshing chain as a drive medium for advancing / retreating operation.

  2. Description of the Related Art Conventionally, as a driving device, there is a meshing chain type lifting device that moves a workpiece such as a heavy object up and down by using a pair of lifting drive meshing chains that mesh with each other and move up and down integrally (see, for example, Patent Document 1). .

  As shown in FIG. 5, the pair of raising / lowering driving engagement chains 550 used in this conventional engagement chain type lifting / lowering device 500 has a pair of raising / lowering movements respectively opposed to both of the pair of raising / lowering engagement mesh chains 550. It is designed to be driven by each sprocket 540.

JP 2009-255997 A (Claims, FIG. 3)

  However, in the conventional meshing chain type lifting device 500, in order to mesh the pair of lifting drive meshing chains 550 with each other in a timely manner, it is necessary to synchronize the rotation phase between the pair of lifting sprockets 540. There has been a problem in apparatus assembly and maintenance that an excessive work load is required for the adjustment work of the rotational phase.

  Further, in the conventional meshing chain type lifting device 500, in order to mesh the pair of lifting drive meshing chains 550 with each other and to advance and retreat in the same direction, the pair of lifting drive meshing chains 550 arranged adjacent to each other. The lifting sprockets 540 are installed on the left and right sides, respectively, and the pair of lifting sprockets 540 are designed to rotate in opposite directions. In such a conventional meshing chain lifting device 500, an electric motor, etc. When the entire apparatus is driven by a single drive source (not shown), it is necessary to install a gear group 564 that interlocks the rotation shafts 530 of the pair of lifting sprockets 540 with each other. Because of this, the device configuration becomes complicated, and the device assembly and maintenance work is excessively burdensome. There is a problem on the stand and maintenance maintenance.

  Furthermore, in the conventional mesh chain type lifting device 500, when the gear group 564 described above is composed of a pair of gears 564a attached to the respective rotating shafts 530 of the pair of lifting sprockets 540, as shown in FIG. The diameter of the gear 564a is inevitably larger than the diameter of the lifting sprocket 540 by the amount of the pair of lifting drive meshing chains 550 disposed between the lifting sprockets 540, and is larger than the lifting sprocket 540. There is a problem in driving the device that the gear group 564 having a diameter hinders the advance / retreat operation of the workpiece in the vicinity of the installation surface of the meshing chain type lifting device 500.

  Further, it is well known in a region where the lifting drive mesh chain 550 is driven to be deflected from the chain branching direction to the chain meshing direction by the lifting sprocket 540, that is, in a region where the lifting drive meshing chain 550 is wound around the lifting sprocket 540. A certain chordal action (polygonal motion) occurs in the lifting drive meshing chain 550. Due to such a chordal action, the lifting drive meshing chain 550 pulsates (vertical motion), vibration and noise due to the pulsation, and fluctuations in speed. There has been a problem to be solved in driving the apparatus that occurs.

  Therefore, the present invention solves the conventional problem, that is, the object of the present invention is to avoid the occurrence of meshing vibration that tends to occur between a pair of meshing chains, and to stabilize by smooth meshing disengagement. Providing a meshing chain type forward / backward movement device that realizes forward / backward movement, simplifies the cooperation mechanism between the meshing chain and the drive sprocket to ensure a high degree of freedom in device design, and reduces the work load related to device assembly and maintenance. It is to be.

  According to the first aspect of the present invention, a pair of meshing chains which are meshed with each other in a state of being opposed to each other and are rigidized together, and which can be separated by being meshed with each other, and one of the pair of meshing chains can be moved forward and backward. A meshing chain comprising: a drive sprocket to be driven; a chain guide for positioning and meshing the other meshing chain with one meshing chain driven by the drive sprocket; and a chain guide plate for mutually guiding the pair of meshing chains The chain guide includes a chain guide surface having the same diameter as the root circle of the drive sprocket, and the drive sprocket and the chain guide are engaged with the chain of the pair of engagement chains. Direction and the chain branching direction are arranged so as to face each other at the deflection position. Forming a trajectory symmetrical for advancing and retreating driving the chain, the chain induction plate, by being disposed in the crotch region of the deflection position, in which to solve the problems described above.

  According to a second aspect of the present invention, in addition to the configuration according to the first aspect, the meshing chain overlaps the hook-shaped inner tooth plate and the hook-shaped inner tooth plate while being shifted by a half pitch in the chain longitudinal direction. The hook-like external tooth plate and the hook-like internal tooth plate are connected to each other in the chain width direction by the bush and the connecting pin fixedly connected to the hook-like external tooth plate in the chain width direction. It solves the problem.

  According to a third aspect of the present invention, in addition to the configuration of the second aspect, the meshing chain is knitted in a double row in the chain width direction, thereby solving the above-described problem.

According to the meshing chain type advance / retreat operation device of the present invention according to claim 1, a pair of meshing chains which are meshed with each other in a state of being opposed to each other, are rigidized integrally, are disengaged from each other, and can be branched. A drive sprocket that drives one of the meshing chains to be able to advance and retreat, a chain guide that positions and meshes the other meshing chain with one meshing chain that is driven by the drive sprocket, and a chain that mutually guides the pair of meshing chains A bilaterally symmetric track having a guide plate, wherein the drive sprocket and the chain guide are arranged opposite to each other at a deflection position between the chain meshing direction and the chain branching direction of the pair of meshing chains, and the pair of meshing chains travel forward and backward. By forming the drive sprocket only on one of the pair of meshing chains Since the number of parts of the entire device is reduced compared to the conventional meshing chain type lifting device in which lifting and lowering sprockets are installed on both of the pair of lifting and lowering meshing chains, the drive sprocket and the like The apparatus configuration can be simplified to ensure a high degree of freedom with respect to the design of other components and the installation location of the entire apparatus, and the work burden associated with apparatus assembly and maintenance can be reduced.
A chain guide for positioning and meshing the other meshing chain with one meshing chain driven by the drive sprocket has a chain guide surface having the same diameter as the root circle of the drive sprocket, and the pair of meshing chains are symmetric. Therefore, it is possible to avoid the occurrence of meshing vibration that tends to occur between the pair of meshing chains and to achieve a smooth meshing and disengaging operation.

  In addition, in the conventional mesh chain type lifting device in which the lifting sprockets are installed on both the pair of lifting drive mesh chains, it is necessary to synchronize the rotation phase between the pair of lifting sprockets. Since the mesh chain type advance / retreat operation device of the invention does not require such phase adjustment of the drive sprocket, the work load related to device assembly and adjustment can be reduced, and also due to the rotational phase shift between the pair of drive sprockets. Thus, it is possible to avoid the occurrence of meshing vibration between the pair of meshing chains and realize a stable advance / retreat operation.

  In addition, the conventional meshing chain type lifting device having the lifting and lowering sprockets installed on both the pair of lifting and lowering driving meshing chains meshes the pair of lifting and lowering driving meshing chains with each other and moves them forward and backward in the same direction. Are installed on the left and right sides of a pair of lifting drive meshing chains arranged adjacent to each other and designed to rotate the pair of lifting sprockets in opposite directions. In this mesh chain type lifting device, when the entire device is driven by a single drive source such as an electric motor, it is necessary to install a gear group that interlocks the rotation shafts of a pair of lifting sprockets. In the meshing chain type advance / retreat operation device of the invention, the drive sprocket may be installed on one of the pair of meshing chains. Without requiring the installation of, reduces the number of parts of the entire device, it is possible to reduce the workload of the simplified and device assembly and maintenance maintenance device configuration.

  Further, in the conventional lifting sprocket, when the gear group described above is composed of a pair of gears attached to the respective rotating shafts of the pair of lifting sprockets, a pair of lifting drive meshes between the pair of lifting sprockets. The diameter of the gear is inevitably larger than the diameter of the lifting sprocket by the amount of the chain, but the meshing chain type advance / retreat operation device of the present invention does not require such a gear group. A position where the tip of the meshing chain that supports the workpiece is closer to the installation surface by preventing the larger gear group from obstructing the workpiece's advance / retreat operation near the installation surface of the meshing chain type advance / retreat operation device It is easy to synchronize with the related equipment installed before and after the meshing chain type advance / retreat operation device, and it can be used for loading and unloading workpieces. It is possible to greatly reduce the work burden that.

  In the region where the meshing chain is driven to be deflected from the chain branching direction to the chain meshing direction by the drive sprocket, that is, in the region where the meshing chain is wound around the drive sprocket, a well-known cordal action (polygonal motion) is applied to the meshing chain. This causes a pulsation (vertical movement) in the meshing chain due to such a cordal action, and vibration, noise, and speed fluctuations due to the pulsation occur, but the drive sprocket is installed only in one of the pair of meshing chains. The mesh chain type advance / retreat operation device is stable because the inconvenience caused by such a cordal action is reduced compared to the conventional mesh chain type advance / retreat operation device in which the drive sprockets are installed on both of the pair of mesh chains. The forward / backward driving can be realized.

  Further, since the chain guide plates for guiding the pair of meshing chains to each other are disposed in the crotch region at the deflection position, the pair of meshing chains are reliably guided from the crotch region side at the deflection position. Smooth engagement and disengagement between the chains can be achieved.

According to the mesh chain type advance / retreat operation device of the present invention according to claim 2, in addition to the effect of the mesh chain type advance / retreat operation device according to claim 1, the mesh chain includes a hook-shaped inner tooth plate and a hook-shaped inner device. The hook-shaped external tooth plate and the hook-shaped internal tooth plate that are overlapped by shifting by a half pitch in the longitudinal direction of the chain with respect to the tooth plate are connected and fixed in the chain width direction to the bush and the hook-shaped external tooth plate that are connected and fixed in the chain width direction. The hook-shaped external tooth plate and the hook-shaped external tooth plate that form one of the pair of meshing chains and the hook-shaped internal tooth plate that constitutes the other meshing chain. Because it meshes tightly with the inner plate in a chuck shape, it is stable by avoiding inadvertent disengagement between the chains. It is possible to realize the withdrawal operation.
According to the engagement chain type advance / retreat operation device of the present invention according to claim 3, in addition to the effect exhibited by the engagement chain type advance / retreat operation device according to claim 2, the engagement chain is knitted in a double row in the chain width direction. As a result, the zipper is firmly engaged in the chuck width direction in the chain width direction, so that it is possible to reliably suppress buckling that tends to occur in the chain width direction of the meshing chain and realize excellent chain durability.

1 is an overall perspective view of a meshing chain type advance / retreat operation device according to an embodiment of the present invention. FIG. 2 is a partially enlarged view of the vicinity of the drive sprocket and the meshing chain shown in FIG. 1. The perspective view which shows the disassembled assembly state of a meshing chain, and the disengagement state. FIG. 2 is a partially enlarged view of the vicinity of the drive sprocket and the meshing chain shown in FIG. 1. The partially enlarged view which shows the conventional meshing chain type raising / lowering apparatus 500. FIG.

The meshing chain type advance / retreat operation device of the present invention comprises:
A pair of meshing chains that mesh with each other in a state of being opposed to each other to be rigid, and that can be separated by being meshed with each other, a drive sprocket that drives one of the pair of meshing chains to move forward and backward, and this drive sprocket A chain guide that positions and meshes the other meshing chain with one meshing chain that is driven by, and a chain guide plate that guides the pair of meshing chains to each other, and the chain guide has the same diameter as the root circle of the drive sprocket The drive sprocket and the chain guide are arranged opposite to each other at a deflection position between the chain meshing direction and the chain branching direction of the pair of meshing chains to make the pair of meshing chains travel forward and backward. A symmetrical path is formed and the chain guide plate is It is arranged in the inter-region, avoiding the occurrence of meshing vibration that tends to occur between a pair of meshing chains, realizing stable advance and retreat operation by smooth meshing and disengaging, simplifying the cooperation mechanism of the meshing chain and the drive sprocket Any specific embodiment may be used as long as it secures a high degree of freedom in device design and reduces the work load related to device assembly and maintenance.

  For example, a pair of meshing chains used in the meshing chain type advance / retreat operation device of the present invention can be integrated with each other by a pair of drive sprockets and can be separated from each other by a pair of drive sprockets and branched. The specific chain form may be any form, for example, one that is a single row in the chain width direction, or a double row that is two or more rows in the chain width direction. However, in the case of adopting a double row of two or more rows in the chain width direction, the hook-like external tooth plate and the hook-like internal tooth plate that constitute one of the pair of meshing chains face each other. The hook-shaped external tooth plate and the hook-shaped internal tooth plate that constitute the other meshing chain are multiplexed and strong in the form of hooks across multiple rows in the chain width direction. For engaging in, so excellent chain durability by reliably suppressed liable to occur buckling in the chain width direction of the engagement chains can be achieved, more preferable.

  Further, the pair of meshing chains used in the meshing chain type advance / retreat operation device of the present invention may be any one not having a roller, i.e., having only a bush, having a roller, etc. When the one having only the bush is adopted, the number of chain parts is reduced, and the weight of the chain can be reduced.

  Further, the pair of meshing chains used in the meshing chain type advance / retreat operation device of the present invention is a silent chain in which a plurality of plates arranged in the chain width direction and the chain longitudinal direction are flexibly coupled by coupling pins. In this case, the plate constituting the silent chain has a meshing tooth meshing with the drive sprocket and a hook portion meshing with the opposing meshing chain, and comes into contact with the chain guide and the chain guide plate by the connecting pin constituting the meshing chain. It is designed to be guided.

Further, the meshing chain type advance / retreat operation device of the present invention has no hindrance to the lifting operation even if the installation surface is a floor surface in a stationary installation form or a ceiling surface in a suspended installation form, and Even if it is a vertical wall surface in a cantilevered form, there is no hindrance to the advancing / retreating operation corresponding to the above-described elevating operation.
In addition, when the suspended installation form and the cantilever support form as described above are adopted, the lifting table used when the stationary installation form is adopted is not an essential component, and the work is carried out using other means. What is necessary is just to attach directly or indirectly to the edge part of a meshing chain.

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 the drawings.
Here, FIG. 1 is an overall perspective view of a meshing chain type advance / retreat operation device according to an embodiment of the present invention, and FIG. 2 is a partially enlarged view of the vicinity of the drive sprocket and the meshing chain shown in FIG. FIG. 3 is a perspective view showing a disassembled assembled state and a disengaged state of the meshing chain, and FIG. 4 is a partially enlarged view showing the vicinity of the drive sprocket and the meshing chain shown in FIG.

  First, as shown in FIG. 1, a meshing chain type advance / retreat operation device 100 according to an embodiment of the present invention has a lifting table 110 on which a heavy object (not shown) as a work is mounted parallel to an installation surface. It is installed to raise and lower.

  As shown in FIGS. 1 and 2, the meshing chain type advance / retreat operation device 100 of the present embodiment has a base plate 120 installed on an installation surface on which the aforementioned lifting table 110 moves up and down in parallel, and the base plate 120. A drive sprocket 140 that rotates forward and backward to rotate forward and backward by rotating forward and backward about a rotating shaft 130 that is installed in parallel, and is driven to reciprocate, is integrally stiffened in a state of being opposed to each other. In addition, a pair of meshing chains 150 that are disengaged from each other and can be freely branched, the lifting table 110 that is installed at the upper end of the meshing chain 150 and moves up and down integrally, and the driven sprocket 163 that rotates the drive sprocket 140 are powered. Power transmission chain 162 for transmitting the power and driving the power transmission chain 162 A driving motor 160 as a power source, a chain guide plate 170 that is arranged in the crotch region at the deflection position of the pair of meshing chains 150 and guides the pair of meshing chains 150 to each other, and one meshing chain that is driven by the drive sprocket 140 150 is provided with a chain guide 190 for positioning and meshing the other meshing chain 150 to be driven as a basic device configuration, and the lifting table 110 carrying the workpiece is directly supported by the pair of meshing chains 150 and pushed up. The motor torque of the drive motor 160 is transmitted without waste.

  As shown in FIGS. 2 and 4, the drive sprocket 140 and the chain guide 190 are arranged to face each other at a deflection position between the chain meshing direction and the chain branching direction of the pair of meshing chains 150.

  As shown in FIG. 4, the drive sprocket 140 is designed to mesh with a bushing 152 constituting a meshing chain 150 described later.

  As shown in FIG. 4, a chain guide surface 190 having the same diameter as the root circle of the drive sprocket 140 is used as the chain guide 190 for positioning and meshing the other mesh chain 150 with one mesh chain 150 driven by the drive sprocket 140. 191 and is designed to guide and guide a bush 152 constituting a meshing chain 150 described later by the chain guide surface 191.

The pair of meshing chains 150 described above are arranged in two sets on the left and right with respect to the lifting table 110, and are in a so-called double-protruding state.
Thereby, when the work is mounted in a state of being unevenly distributed on the lifting table 110, or when there is a risk of rolling that tends to occur in the width direction of the lifting table 110 in the vicinity of the most elevated position of the lifting table 110. In addition, the pair of meshing chains 150 respectively disposed on the left and right sides of the lifting table 110 are lifted and lowered in a self-supporting state in which the total load including the mounted work is divided into two and the load is reduced.

The power transmission chain 162 described above is composed of two sets of roller chains for transmitting power from the motor-side sprocket 161 to the driven-side sprocket 163, and is in a so-called two-hanging state.
As a result, the power transmitted from the motor-side sprocket 161 to the driven-side sprocket 163 is divided into two to reduce the transmission load.
Moreover, even if one of the two sets of power transmission chains 162 is cut, the other power transmission chain 162 transmits power so that the lifting table 110 does not fall.

  Reference numerals 161 shown in FIGS. 1 and 2 are a pair of motor-side sprockets 161 coaxially arranged on the output shaft side of the drive motor 160 provided with a speed reduction mechanism.

  In the meshing chain type advance / retreat operation device 100 of the present embodiment, as shown in FIGS. 2 and 4, the chain guide plate 170 that guides and moves the pair of meshing chains 150 includes a crotch between the deflection positions of the pair of meshing chains 150. A pair of meshing chains 150 are meshed with each other and lifted together in a self-supporting state at the time of ascending drive, and the pair of meshing chains 150 are separated from each other and branched.

  Further, as shown in FIG. 1, the drive motor 160 having the speed reduction mechanism as described above is spaced apart from the peripheral region of the lowest position of the lifting table 110, that is, outside the region under the projection umbrella of the lifting table 110. Yes.

Further, as shown in FIG. 1, the above-described chain storage means 180 is also spaced apart from the peripheral area of the lowest position of the lifting table 110, that is, outside the area under the projection umbrella of the lifting table 110, as with the drive motor 160. ing.
That is, one of the pair of meshing chains 150 that are separated from each other and branched is housed in the chain housing means 180 including the winding-type chain housing box 181 disposed on the drive motor 160 side, and the pair of meshing chains. Similarly, the other 150 is housed in a chain housing means 180 comprising a winding-type chain storage box 181 disposed on the opposite side facing the drive motor 160.

  Therefore, the lowering position of the lifting table 110 can be lowered without considering the height dimension of the drive motor 160 and the chain storage means 180, that is, the lifting table 110 can be lowered. The work load for loading and unloading the workpiece with respect to the lift table 110 is greatly reduced, and the drive motor 160 and the chain storage means 180 can be safely and easily maintained during maintenance of the lift mechanism without causing trouble. It is like that.

  Furthermore, as shown in FIGS. 2 to 4, the pair of meshing chains 150 used in the meshing chain type advance / retreat operation device 100 according to one embodiment of the present invention is a hook-shaped internal tooth plate 151 that is spaced apart from each other as a pair. A pair of front and rear connecting pins in which an inner link unit 153 formed by press-fitting a pair of front and rear bushes 152 is press-fitted into a pair of front and rear pin holes of a hook-like external tooth plate 154 disposed on the outermost side in the chain width direction. A number 155 is connected in the longitudinal direction of the chain.

  Further, as shown in FIGS. 2 and 3, the pair of meshing chains 150 meshes the hook-shaped inner tooth plates 151 and the hook-shaped outer tooth plates 154 facing each other while deflecting from the horizontal direction to the vertical direction. The hook-like inner tooth plates 151 and the hook-like outer tooth plates 154 are disengaged and branched while being deflected from the vertical direction to the horizontal direction. ing.

In the meshing chain type advance / retreat operation device 100 of the present embodiment obtained in this way, a pair of meshing chains 150 that mesh with each other in a state of being opposed to each other and stiffen together, and that are separable from each other and can be branched. A driving sprocket 140 that drives one of the pair of meshing chains 150 so as to freely advance and retract, and a chain guide 190 that positions and meshes the other meshing chain 150 with one meshing chain 150 driven by the driving sprocket 140, The sprocket 140 and the chain guide 190 are disposed to face each other at a deflection position between the chain meshing direction and the chain branching direction of the pair of meshing chains 150.
Accordingly, the drive sprocket 140 only needs to be installed on one of the pair of meshing chains 150, and the conventional meshing chain lifting device 500 in which the lifting sprocket 540 is installed on both of the pair of lifting drive meshing chains 550, respectively. In comparison, the number of parts of the entire device is reduced, so the device configuration can be simplified to ensure a high degree of freedom regarding the design of other components and the installation location of the entire device, as well as the work load related to device assembly and maintenance. Can be reduced.

  Further, in the conventional meshing chain lifting device 500 in which the lifting sprocket 540 is installed in both the pair of lifting drive meshing chains 550, it is necessary to synchronize the rotation phase between the pair of lifting sprockets 540. However, since the meshing chain type advance / retreat operation device 100 of the present invention does not require such phase adjustment of the drive sprocket 140, the work load related to device assembly and adjustment can be reduced. In order to avoid the occurrence of meshing vibration between the pair of meshing chains 550 caused by a shift in the rotational phase between the lifting sprockets 540, a stable advance / retreat operation of the workpiece can be realized.

  In addition, the conventional meshing chain type lifting device 500 in which the lifting sprockets 540 are installed on both the pair of lifting drive meshing chains 550 respectively mesh the pair of lifting drive meshing chains 550 with each other in the same direction. In order to advance and retreat, the elevating sprockets 540 are installed on the left and right sides of the pair of elevating drive meshing chains 550 arranged adjacent to each other, and the pair of elevating sprockets 540 are rotated in opposite directions. In such a conventional meshing chain lift device 500, when the entire device is driven by a single drive source such as an electric motor, the rotary shafts 530 of the pair of lift sprockets 540 are interlocked with each other. However, in the meshing chain type advance / retreat operation device 100 of the present invention, the gear group 564 to be operated is required. Since it is only necessary to install the drive sprocket 140 on one of the pair of meshing chains 150, the installation of the gear group 564 described above is not necessary, the number of parts of the entire apparatus can be reduced, the apparatus configuration is simplified, and the apparatus is assembled and maintained. The work burden can be reduced.

  Further, in the conventional mesh chain type lifting device 500, when the gear group 564 described above is composed of a pair of gears 564a attached to the rotary shafts 530 of the pair of lifting sprockets 540, the pair of lifting sprockets 540 are mutually connected. The diameter of the gear 564a is inevitably larger than the diameter of the lifting sprocket 540 by the amount of the pair of lifting drive meshing chains 550 disposed between them. Since the gear group 564 is not required, the gear group 564 having a diameter larger than that of the drive sprocket 140 is prevented from obstructing the advance / retreat operation of the lift table 110 in the vicinity of the installation surface of the meshing chain type advance / retreat operation device 100. Can be moved closer to the installation surface to support the lifting table 110. The synchronization between the related equipment installed before and after the chain type forward and backward actuating device 100 to facilitate the work burden on the loading and unloading of the workpiece can be greatly reduced.

  In a region where the meshing chain 150 is driven to be deflected from the chain branching direction to the chain meshing direction by the drive sprocket 140, that is, in a region where the meshing chain 150 is wound around the drive sprocket 140, a well-known cordal action (polygonal motion) is performed. Is generated in the meshing chain 150, and pulsation (vertical motion) is caused in the meshing chain 150 due to such a chordal action, and vibration, noise, and speed fluctuation due to the pulsation are generated, but only one of the pair of meshing chains 150 is driven. In the meshing chain type advance / retreat operation device 100 of the present invention in which the sprocket 140 is installed, compared to the conventional meshing chain type lifting device 500 in which the lifting sprocket 540 is installed in both of the pair of lifting drive meshing chains 550, respectively. , According to the chordal action like this Since disadvantages are alleviated, it is possible to realize stable forward and backward driving of the work.

A chain guide 190 that positions and meshes the other meshing chain 150 with one meshing chain 150 driven by the drive sprocket 140 includes a chain guide surface 191 having the same diameter as the root circle of the drive sprocket 140.
Therefore, since the pair of meshing chains 150 advance and retreat on a bilaterally symmetrical track, it is possible to avoid the occurrence of meshing vibration that tends to occur between the pair of meshing chains 150 and to achieve a smooth meshing and disengaging operation.

A chain guide plate 170 for guiding the pair of meshing chains 150 to each other is disposed in the crotch region at the deflection position.
Therefore, since the chain guide plate 170 reliably guides the pair of meshing chains 150 from the crotch region side of the deflection position, it is possible to achieve a smooth meshing and disengaging operation between the pair of meshing chains 150.

The meshing chain 150 includes a hook-shaped internal tooth plate 151, a hook-shaped external tooth plate 154 that overlaps the hook-shaped internal tooth plate 151 with a half-pitch shift in the longitudinal direction of the chain, and the hook-shaped internal tooth plate 151 that has a chain width. The bush 152 is connected and fixed in the direction, and the connecting pin 155 is connected and fixed to the hook-shaped external tooth plate 154 in the chain width direction.
Therefore, the hook-shaped external tooth plate 154 and the hook-shaped internal tooth plate 151 constituting one of the pair of meshing chains 150 are combined with the hook-shaped external tooth plate 154 and the hook-shaped internal teeth constituting the other meshing chain 150 facing each other. Since the plate 151 is firmly engaged with the plate 151 in a chuck shape, it is possible to achieve a stable advance and retreat operation by avoiding inadvertent disengagement between the chains.

DESCRIPTION OF SYMBOLS 100 ... Engagement chain type advance / retreat operation device 110 ... Elevating table 120 ... Base plate 130 ... Rotating shaft 140 ... Drive sprocket 150 ... Engagement chain 151 ... Hook-shaped internal tooth plate 152・ ・ ・ Bush 153 ・ ・ ・ Inner link unit 154 ・ ・ ・ Hook-shaped external tooth plate 155 ・ ・ ・ Connection pin 160 ・ ・ ・ Drive motor 161 ・ ・ ・ Motor side sprocket 162 ・ ・ ・ Power transmission chain 163 ・ ・ ・ Follow Side sprocket 170 ・ ・ ・ Chain guide plate 180 ・ ・ ・ Chain storage means 190 ・ ・ ・ Chain guide 191 ・ ・ ・ Chain guide surface

Claims (3)

A pair of meshing chains that mesh with each other in a state of being opposed to each other to be rigid, and that can be separated by being meshed with each other, a drive sprocket that drives one of the pair of meshing chains to move forward and backward, and the drive sprocket A meshing chain type advance / retreat operation device comprising: a chain guide for positioning and meshing the other meshing chain with one meshing chain driven by: a chain guide plate for mutually guiding the pair of meshing chains;
The chain guide includes a chain guide surface having the same diameter as the root circle of the drive sprocket,
The drive sprocket and the chain guide are arranged opposite to each other at a deflection position between the chain meshing direction and the chain branching direction of the pair of meshing chains to form a bilaterally symmetric track for moving the pair of meshing chains forward and backward. And
The meshing chain type advance / retreat operation device, wherein the chain guide plate is disposed in a crotch region of the deflection position.   The meshing chain is connected and fixed in the chain width direction between the hook-shaped inner tooth plate and the hook-shaped inner tooth plate that are overlapped with each other by shifting the hook-shaped inner tooth plate by a half pitch in the chain longitudinal direction. The meshing chain type advance / retreat operation device according to claim 1, comprising: a bushing to be connected to and a connecting pin connected and fixed to the hook-shaped external tooth plate in a chain width direction. The meshing chain type advance / retreat operation device according to claim 2, wherein the meshing chains are knitted in double rows in the chain width direction.

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