JP2009249129A - Meshing chain-type lifter assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a meshing chain-type lifter assembly capable of stably lifting a lifted object by restraining vibrations propagated to a lifting table without the need of an excessive working burden with simple processing, disassembling and assembling operations of each members constituting the lifter assembly. <P>SOLUTION: This meshing chain-type lifter assembly 100 comprises a lifting table 110, a lifting sprocket 140, a lift-driving meshing chain 150, and a drive source 160. A vibration restraining member 188 for restraining vibration propagation from the lift-driving meshing chain 150 to the lifting table 100 is installed between the lift-driving meshing chain 150 and the lifting table 110. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is a drive device for moving an object to be lifted and retracted in parallel to an 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 driving device that employs a meshing chain as a drive medium for advancing and retreating operations.

Conventionally, as a lifting device, there is a pair of meshing chains that mesh with each other and move up and down integrally, that is, a lifting device that lifts and lowers an object to be lifted such as a heavy object using a chuck chain (see, for example, Patent Document 1). ).
And the load support member which mounts a to-be-lifted object on the upper surface is connected with the upper end of a pair of meshing chain.
Japanese Patent No. 3370928

  However, in the conventional lifting device, it is generated due to the meshing between a pair of meshing chains, the meshing between the sprocket and the meshing chain, the dimensional tolerance of each component constituting the lifting device, the positional deviation at the time of assembly, etc. Since the transmitted vibration propagates from the meshing chain to the load support member, there is a problem that the vibration is transmitted to the object to be lifted and mounted on the load support member and the lifting operation becomes unstable.

  In addition, in order to eliminate the dimensional tolerance of each constituent member that constitutes the lifting device and the positional deviation at the time of assembly, which is one of the causes of the occurrence of vibration as described above, each constituent member that constitutes the lifting device is increased. There is a problem that machining and assembly must be performed with high precision, and such a high-precision machining operation and assembly work are troublesome and an excessive work load is required.

  Therefore, the present invention solves the conventional problem, that is, the object of the present invention is to stabilize the object to be lifted by suppressing the vibration propagated to the lifting table without requiring an excessive work load. It is an object of the present invention to provide a meshing chain type lifting device that realizes a lifting operation and that is simple in processing and disassembling and assembling work of each component constituting the lifting device.

  A first aspect of the present invention according to claim 1 is a pair of elevating and lowering sprockets that face each other in the same plane and rotate forward and backward in opposite directions around a pair of sprocket drive shafts arranged parallel to the installation surface, The pair of elevating sprockets mesh with each other while being deflected from the horizontal direction to the vertical direction and rise together in a self-supporting state, and the pair of elevating sprockets deviate from each other while being deflected from the vertical direction to the horizontal direction. A meshing chain type comprising a pair of branching raising and lowering interlocking chains, a lifting table installed at the upper end of the lifting and lowering interlocking chain, and a drive source for driving the pair of lifting and lowering sprockets In the lifting device, a vibration suppressing member that suppresses vibration propagated from the lifting drive meshing chain to the lifting table is the lifting drive meshing shaft. By provided between the over ting lifting table is obtained by solving the problems described above.

  According to a second aspect of the present invention, in addition to the structure of the first aspect, the vibration suppression member is a vibration suppression washer loosely fitted to a fastening bolt that mutually fastens the lifting drive engagement chain and the lifting table. As a result, the above-described problems are solved.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the vibration suppression member is a vibration suppression sheet provided on the back surface of the lifting table, thereby solving the above-described problem. It is a thing.

  According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, the elevating / lowering engagement chain and / or elevating table is provided in the elevating / lowering engagement chain and / or elevating / lowering. The above-described problem is solved by molding from a damping material that attenuates vibration propagated to the table.

  Therefore, the present invention provides a pair of elevating sprockets that are opposed to each other in the same plane and rotate forward and backward in opposite directions around a pair of sprocket drive shafts arranged parallel to the installation surface, and a pair of elevating elevators. A pair of sprockets that are engaged with each other while being deflected from the horizontal direction to the vertical direction by the sprocket for lifting and rising in a self-supporting state, and that are separated from each other while being deflected from the vertical direction to the horizontal direction by the pair of elevating sprockets. The lifting / lowering engagement chain, the lifting / lowering table installed at the upper end of the lifting / lowering engagement chain, and the drive source for driving the pair of lifting / lowering sprockets are provided. Regardless of the up-and-down rotation of the elevating sprocket, the elevating operation of the elevating table can be achieved at a constant speed and quickly. Both can achieve high design flexibility of the drive portion chain housing means, in addition, it is possible to obtain the significant effect that corresponds to the specific configuration as follows.

  According to the meshing chain type lifting device of the present invention according to claim 1, the vibration suppression member is provided between the lifting drive meshing chain and the lifting table, so that the vibration suppression member is separated from the lifting drive meshing chain. Since the propagation of vibration to the lifting table is suppressed, the engagement between the pair of lifting drive meshing chains, the meshing of the lifting sprocket and the lifting drive meshing chain, and the dimensions of each component constituting the meshing chain type lifting device Stable raising / lowering drive can be realized without transmitting vibrations that tend to occur due to tolerances or misalignment during assembly to the object to be lifted.

  In addition, as described above, the vibration generated by the vibration suppressing member is used to reduce vibration generated due to the dimensional tolerance of each component member constituting the mesh chain type lifting device and the positional deviation at the time of assembly. It is not necessary to process and assemble the constituent members constituting the apparatus with high accuracy, and the work burden in the machining operation and the disassembly and assembling operation constituting the constituent members of the meshing chain type lifting device can be reduced.

  According to the meshing chain type lifting device of the present invention according to claim 2, in addition to the effect exhibited by the meshing chain type lifting device according to claim 1, the vibration suppressing member mutually connects the lifting chain and the lifting table. Because it is a vibration suppression washer that is loosely fitted to the fastening bolt that is fastened to, when the lifting table is assembled to the upper end of the lifting drive engagement chain using the fastening bolt, the vibration suppression washer can be loosely fitted to the fastening bolt. Vibration propagation to the lifting table can be easily suppressed without increasing the work load, and the vibration suppression washer absorbs and blocks vibration transmitted to the lifting object, causing the lifting object to fall inadvertently from the lifting table. Stable up-and-down transfer can be realized without any problem.

  According to the meshing chain type lifting device of the present invention according to claim 3, in addition to the effect produced by the meshing chain type lifting device according to claim 1 or 2, the vibration suppressing member is provided on the back surface of the lifting table. By using the vibration suppression sheet, the lifting vibration that tends to occur in the lifting table is absorbed and mitigated over the entire back surface of the lifting table, so that a stable loading surface of the lifting table can be provided.

  According to the meshing chain type lifting device of the present invention according to claim 4, in addition to the effect produced by the meshing chain type lifting device according to any one of claims 1 to 3, the lifting chain meshing chain and / or Since the lifting table is formed from the damping material, the vibration propagating to the lifting drive and / or the lifting table is absorbed and attenuated by the material, so that it is between the pair of lifting drive engagement chains. Stable raising / lowering drive can be realized without transmitting vibration generated due to meshing or engagement between the raising / lowering sprocket and the raising / lowering driving engagement chain to the object to be raised / lowered.

  A mesh chain type lifting device according to the present invention includes a pair of lifting sprockets that are opposed to each other in the same plane and rotate forward and backward in opposite directions around a pair of sprocket drive shafts arranged parallel to the installation surface. The two lift sprockets are engaged with each other while being deflected from the horizontal direction to the vertical direction and lifted together in a self-supporting state, and the pair of lift sprockets are displaced from each other while being deflected from the vertical direction to the horizontal direction. A meshing chain type lifting device comprising a pair of raised and lowered meshing chains for lifting and lowering, a lifting and lowering table installed at the upper end of the lifting and lowering meshing chains, and a drive source for driving the pair of lifting and lowering sprockets In the above, the vibration suppressing member that suppresses vibration propagated from the lifting drive meshing chain to the lifting table is a lifting drive meshing chain. It is provided between the lifting table and suppresses vibrations that are propagated to the lifting table without requiring an excessive work load, realizing a stable lifting movement of the object to be lifted. Any specific embodiment may be used as long as it provides a meshing chain type lifting device that can be easily processed and disassembled and assembled.

  For example, two sets of raising / lowering driving engagement chains respectively arranged on the raising / lowering table in the engagement chain type raising / lowering device of the present invention are so-called chuck chains, and are moved from the horizontal direction to the vertical direction by a pair of raising / lowering sprockets. A specific chain that engages with each other immediately after the deflection drive and lifts up in a self-supporting state and branches off from each other during the deflection drive from the vertical direction to the horizontal direction by a pair of elevating sprockets. The form may be any form, for example, having a roller, not having a roller, that is, having only a bush, one single row in the chain width direction, or in the chain width direction. The chain may be any one of two or more double rows, or a combination thereof. In the case of adopting two or more double rows in the direction, the outer toothing plate and the inner toothing plate constituting one of the pair of raising and lowering driving meshing chains are opposed to the other raising and lowering driving meshing chain. Are generated in the chain width direction of the meshing chain for raising and lowering drive because the outer tooth plate and the inner tooth plate that constitute the upper and lower teeth are engaged in multiple hooks, so-called chucks, in multiple rows in the chain width direction. It is more preferable because it can reliably suppress the buckling that tends to occur and realize excellent chain durability.

  Further, in the above-described lifting drive meshing chain, a bush that is integrally provided with a plate-side press-fitting portion that is press-fitted to the internal tooth plate and a sprocket meshing portion having a larger diameter than the plate-side press-fitting portion may be employed. When a bushing is used, the sprocket for lifting and lowering is stably contacted with the specified outer peripheral surface of the sprocket meshing part formed integrally with the bushing. It is possible to prevent the center of the roller from being unevenly distributed with respect to the center of the connecting pin or the bush when meshing, and the occurrence of meshing vibration and meshing noise between the lifting sprocket and the bushing and the lifting sprocket in this way. To prevent the occurrence of meshing vibration between the chain and the occurrence of misalignment in the meshing timing between the chains. Thus, it is possible to realize a stable raising / lowering operation without giving vibration generated due to such a shift in the meshing timing to the object to be lifted and efficiently transmit the rotational force of the lifting sprocket to the lifting drive meshing chain. be able to.

  Further, in the lifting drive meshing chain, the pitch between the bushes of the inner tooth plate is the press-fitting fit to the lower side of the preceding inner tooth plate during the lifting drive by the lifting sprocket, and the inner tooth following the inner tooth plate. Set to be equal to the mutual distance from the center of the bush press-fitted to the upper side of the plate, that is, the pitch between the pins of the outer tooth plate is the pitch between the bushes of the inner tooth plate and the inner periphery of the bush and the connecting pin It may be set to be equal to the length obtained by adding the diameter difference from the outer circumference, and when the pin pitch and bush pitch are set in this way, it is caused by the load of the object to be lifted and lowered. Even when the connecting pins are unevenly distributed in the longitudinal direction of the chain in each internal tooth plate with respect to the bush, the mutual spacing of the bushes in the longitudinal direction of the chain becomes equal. Suppresses rattling that tends to occur with the lifting sprocket when the bushes are not evenly spaced from each other, and can achieve a smooth meshing state with the lifting sprocket. By making the mutual distances of the bushes equal to each other, an external tooth plate and an internal tooth plate constituting one of the pair of lifting drive meshing chains, and an external tooth plate and an internal tooth plate constituting the other lifting drive meshing chain, Since the positional relationship in the longitudinal direction of the chain between them, that is, the height relationship can be appropriately adjusted in a state shifted by a half pitch, smooth meshing timing between the chains can be realized.

  In addition, the specific materials of the vibration suppression washer and the vibration suppression sheet used as the vibration suppression member in the meshing chain lifting device of the present invention exhibit excellent vibration isolation performance and propagate from the lifting drive meshing chain to the lifting table. Any material such as natural rubber, synthetic rubber, elastic synthetic resin, vibration-damping steel, casting, etc. may be used as long as it suppresses vibrations.

  Further, each component constituting the lifting drive meshing chain, the lifting table, and / or the table mounting means, for example, a table side bracket, a chain side bracket, a chain side spacer, a control used as a material for the chain end mounting plate. As for the specific mode of the vibration material, as long as the vibration propagated to these components is attenuated, the vibration-damping property is applied to the composite vibration-damping steel material in which the polymer material is combined with the steel material and the metal material itself. Any imparted non-composite type (alloy type) damping steel may be used.

  In addition, regarding the table mounting means for connecting the lifting / lowering driving engagement chain and the lifting / lowering table in the engagement chain type lifting / lowering device of the present invention, as long as it securely connects the lifting / lowering driving engagement chain and the lifting / lowering table, its specific The target aspect may be any.

  Furthermore, in the meshing chain type lifting device of the present invention, the lifting table that lifts and lowers the object to be lifted is lifted and lowered by the driving force of the lifting drive meshing chain. In order to guide the stable lifting operation of this lifting table It is desirable to interpose a lift assist guide means between the lift table and the installation floor surface side. The specific form of the lift assist guide means is an X-shaped punter arm used for a scissor lifter or the like. It may be a telescopic pipe used for a guide post lifter or the like.

And the meshing chain type lifting 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, Even if the vertical wall surface is in a cantilevered form, there is no hindrance to the advancing / retreating operation corresponding to the above-described lifting operation.
In addition, when adopting the above-described suspended installation form and cantilever support form, the lifting table used in the case of adopting the stationary installation form is not an indispensable component, and the object to be lifted / lowered using other means is used. What is necessary is just to attach directly or indirectly to the edge part of the meshing chain for raising / lowering drive.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A meshing chain lifting apparatus 100 that is 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 lifting device which is an embodiment of the present invention, and FIG. 2 is a perspective view of the state in which the lifting table and the panta arm are removed from FIG. 3 is a partially enlarged view of the vicinity of the lifting drive sprocket shown in FIG. 2, FIG. 4 is a perspective view showing an exploded assembly state and a disengagement state of the lifting drive engagement chain, and FIG. FIG. 6 is an exploded view of the table mounting means, FIG. 7 is a usage diagram of the vibration suppression washer, and FIG. 8 is a vibration view. It is a use mode figure of a control sheet.

First, as shown in FIG. 1, the meshing chain type lifting device 100 according to the first embodiment of the present invention lifts and lowers a lifting table 110 carrying a heavy object (not shown) parallel to the installation floor surface. It is to be installed.

  As shown in FIGS. 1 to 3, the meshing chain lifting device 100 according to the present embodiment includes a base plate 120 installed on the installation floor surface on which the above-described lifting table 110 moves up and down in parallel, and the base plate 120. A pair of elevating sprockets 140 that are opposed to each other in the same plane and rotate forward and backward in the opposite direction around a pair of sprocket drive shafts 130 that are juxtaposed in parallel with each other, and that the pair of elevating sprockets 140 are engaged with each other. The pair of lifting drive mesh chains 150 that lift and lower the lifting table 110 by rotating, the lifting table 110 that is installed at the upper end of the lifting drive mesh chain 150 and moves up and down integrally, and the pair of lifting sprockets 140 are rotated. A power transmission chain 162 for transmitting power to the synchronous gear group 163 to be driven, and this power transmission A drive motor 160 as a drive source for driving the chain 162 and a chain guide plate 170 provided in a crotch region where the pair of lift sprockets 140 are opposed to guide and move the pair of lift drive mesh chains 150 are basically provided. It is provided as a device configuration.

The pair of lifting drive engagement 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 two-protruding state.
Thereby, when the object to be lifted 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 highest lift position of the lifting table 110. Even if there is, a pair of lifting drive engagement chains 150 arranged on both the left and right sides of the lifting table 110 divide the entire load including the mounted lifted object into two parts, and lift and lower in a self-supporting state in which the load is reduced. It is supposed to be.
Moreover, even if one of the two pairs of lifting drive mesh chains 150 arranged in a pair is cut, the other pair of lifting drive mesh chains 150 supports the lifting table 110 so as not to fall. .

The power transmission chain 162 is composed of two sets of roller chains for transmitting power from the driving side sprocket 161 to the driven side sprocket of the synchronous gear group 163, and is in a so-called double hooked state. Yes.
Thereby, the power transmitted from the drive side sprocket 161 to the driven side sprocket 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.

Furthermore, the drive motor 160 as the drive source described above includes a speed reduction mechanism that includes a known worm and a worm gear (not shown).
Thereby, even if a drive failure occurs, a mutual meshing resistance between the worm and the worm gear, that is, a so-called self-locking function works.

In this embodiment, the drive motor 160 is used as a drive source for driving the lifting sprocket. However, the drive motor 160 is set to manually generate drive force using other drive means, for example, a handle. No matter what.
Further, reference numeral 161 shown in FIGS. 1 and 2 is a pair of drive side sprockets 161 coaxially arranged on the output shaft side of the drive motor 160 provided with a speed reduction mechanism, and reference numeral 163 shown in FIG. 3 is a pair of power transmissions. This is a synchronous gear group for transmitting power from the chain 162 to the pair of elevating sprockets 140 so as to rotate forward and backward in opposite directions.

  In the meshing chain lifting device 100 of the present embodiment, as shown in FIG. 3, the chain guide plate 170 that guides and moves the pair of lifting drive meshing chains 150 includes a crotch region where the pair of lifting sprockets 140 face each other. So that the pair of lifting drive engagement chains 150 are engaged with each other and lifted together in a self-supporting state, and the pair of lift drive engagement chains 150 are disengaged from each other and branched. It has become.

  Further, as shown in FIG. 1 and the like, the drive motor 160 provided with the speed reduction mechanism as described above is spaced apart from the peripheral area of the lowest position of the lift table 110, that is, outside the area under the projection umbrella of the lift table 110. ing.

Further, as shown in FIG. 1, the above-described chain storage means 190 is also spaced apart from the area around 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 lifting drive meshing chains 150 that are separated from each other and branched is housed in a chain housing means 190 including a take-up type chain housing box 191 disposed on the drive motor 160 side. The other of the lifting drive meshing chains 150 is configured to be housed in a chain housing means 190 including a linear storage rail 192 disposed on the opposite side facing the drive motor 160.

Therefore, it is possible to lower the lowest position of the lifting table 110, that is, to lower the floor of the lifting table 110, without considering the height of the drive motor 160 and the meshing chain storage means 190. The work load for carrying the object to and from the lifting table 110 is greatly reduced, and the drive motor 160 is maintained during maintenance of the lifting mechanism.
In addition, the meshing chain storage means 190 does not become an obstacle to work and can perform a safe and simple maintenance work.

Further, as shown in FIG. 1, an up-and-down auxiliary guide having an upper and lower two-stage connection comprising an inner arm 194 and an outer arm 195 called an X-shaped panter arm between the lifting table 110 and the base plate 120 on the installation floor surface side. By interposing the means 193, it is configured to guide a stable lifting operation of the lifting table 110.
Reference numeral 196 shown in FIG. 1 and the like is a slide rail for sliding the lower end of the inner arm 194 in accordance with the raising / lowering operation.

  Further, the pair of raising / lowering engagement chains 150 used in the engagement chain type lifting apparatus 100 according to the first embodiment of the present invention is a so-called chuck chain. As shown in FIG. Of the inner tooth plate 151, a hook-shaped outer tooth plate 152 that overlaps the inner tooth plate 151 by a half pitch in the chain longitudinal direction, and a bushing 153 that connects and fixes the inner tooth plates 151 in the chain width direction. And a roller 154 fitted on the bush 153 and a connecting pin 155 for connecting and fixing the external tooth plates 152 in the chain width direction, and vertically extending from the horizontal direction along the chain guide plate 170 described above. A pair of elevating sprockets 14 that are engaged with each other while being deflected in the direction and ascend in a self-supporting state. It is arranged to branch off bite each other while deflecting from the vertical to the horizontal direction by.

  The internal tooth plate 151 and the external tooth plate 152 constituting one of the pair of lifting drive meshing chains 150 are opposed to the internal tooth plate 151 and the external tooth plate constituting the other lifting drive meshing chain 150 facing each other. 152 and a plurality of hooks, so-called chucks, are engaged with each other in multiple rows in the chain width direction, and are firmly engaged with each other while supporting the entire load including the mounted object to be lifted and lowered. Even when an eccentric load is applied to one side in the chain width direction of the lifting / lowering interlocking chain 150 that moves up and down in a self-supporting state, buckling tends to occur in the chain width direction of the lifting / lowering interlocking chain 150 in an overloaded state. Suppressing it reliably to ensure excellent chain durability and avoiding accidental chain cutting.

Further, as shown in FIGS. 5 and 6, table attachment means 180 is interposed between the above-described raising / lowering driving engagement chain 150 and the raising / lowering table 110.
The table attaching means 180 includes a table side bracket 181 as a table reinforcing member welded to the back surface of the lift table 110, a chain side bracket 182 attached to the back surface of the table side bracket 181, and the lift drive meshing chain 150. The chain end mounting plate 183 is attached to the upper end via a connecting pin 155, and the chain side spacer 184 functions as a spacer and connects between the chain end mounting plate 183 and the chain side bracket 182. Yes.
The constituent members 181, 182, 183, and 184 constituting the table attaching means 180 are fastened to each other via fastening bolts 185.
Moreover, the code | symbol 186 shown in FIG.6 and FIG.7 is a bolt hole which inserts the fastening volt | bolt 185, and the code | symbol 187 shown in FIG.6 and FIG.7 is a metal washer used by a pair with the fastening volt | bolt 185. FIG.

  Then, by interposing the table mounting means 180 between the lifting drive mesh chain 150 and the lifting table 110 in this way, each component constituting the table mounting means 180 when the mesh chain lifting apparatus 100 is assembled and disassembled. By releasing any one of the engagements 181, 182, 183, and 184, the maintenance table and the like can be easily achieved by disassembling the lifting table 110 and the lifting drive engagement chain 150 without requiring an excessive work load. In addition, when changing the design of the lifting table 110 and / or the lifting drive engagement chain 150 according to the embodiment, a part of each of the constituent members 181, 182, 183, 184 constituting the table mounting means 180 is used. Depending on the form of the lifting table 110 and / or the lifting chain meshing chain 150 Just it has to be able to respond quickly and easily replaced.

Therefore, the vibration suppression washer 188a and the vibration suppression sheet 188b used as the vibration suppression member 188, which is the most characteristic feature of the meshing chain lifting device 100 of the present embodiment, will be described in detail with reference to FIGS.
First, a vibration suppression washer 188a made of synthetic rubber used as the vibration suppression member 188 includes a lifting drive meshing chain 150 between the lifting drive meshing chain 150 and the lifting table 110, as shown in FIGS. Each component member 181, 182, and 183 that constitutes table attachment means 180 that is loosely fitted to a fastening bolt 185 that fastens the lift table 110 to each other, that is, the lift drive engagement chain 150 and the lift table 110 are connected. , 184 are fastened to fastening bolts 185 that mutually fasten, and the vibration transmitted from the lifting drive engagement chain 150 to the lifting table 110 is suppressed.

Further, a vibration suppression sheet 188b made of synthetic rubber used as the vibration suppression member 188 is provided on the back surface of the lift table 110 between the lift drive engagement chain 150 and the lift table 110, as shown in FIGS. That is, it is attached to the back surface of the table side bracket 181 welded to the back surface of the lift table by a fastening bolt 185 so as to suppress vibration transmitted from the lift drive engagement chain 150 to the lift table 110. It has become.
The specific arrangement of the vibration suppression sheet 188b is not limited to the back surface of the table side bracket 181 described above. For example, the vibration suppression sheet 188b is disposed between the attachment surfaces of the chain side bracket 182 and the chain side spacer 184. May be.

  In addition, the lifting drive meshing chain 150, the lifting table 110, the table side bracket 181 constituting the table mounting means 180, the chain side bracket 182, the chain end mounting plate 183, and the chain side spacer 184 are made of a composite material of steel and a polymer material. It is designed to damp vibrations that are formed and propagated from the damping material made of the reinforced damping steel material.

Next, the raising / lowering operation | movement of the meshing chain type raising / lowering apparatus 100 which is 1st Example of this invention is demonstrated based on FIG.
First, as shown in FIG. 1, when the lifting table 110 reaches the highest position, a pair of lifting drive engagement chains 150 are formed of a chain storage box 191 and a linear storage rail 192 by a pair of lifting sprockets 140. A drive motor provided with a speed reduction mechanism while being supported from the storage means 190 and supporting the entire weight of the lift table 110 on which the pair of lift drive engagement chains 150 is mounted with a lifted object (not shown) made of heavy objects. In accordance with the output of 160, the power transmission chain 162 hung by two is raised at a constant speed and quickly.
At this time, the vertical auxiliary guide means 193 composed of the inner arm 194 called the X-shaped panter arm and the outer arm 195, which is connected in the upper and lower stages, guides the stable upward movement of the vertical table 110. It has become.

On the other hand, when the lifting table 110 reaches the lowest position, the pair of lifting drive mesh chains 150 are branched to the chain storage means 190 including the chain storage box 191 and the linear storage rail 192 by the pair of lifting sprockets 140, respectively. While being pulled in, two pairs of lifting drive engagement chains 150 are hung according to the output of the drive motor 160 having a speed reduction mechanism while supporting the entire weight of the lifting table 110 on which a heavy object (not shown) is mounted. The power transmission chain 162 descends at a constant speed and quickly.
At this time, the upper / lower auxiliary guide means 193 composed of the above-mentioned X-shaped inner arm 194 and outer arm 195, which is connected in the upper and lower stages, guides the stable lowering operation of the lifting table 110 while being folded. ing.

In the meshing chain type lifting device 100 of this embodiment obtained in this way, the vibration suppression washer 188 a and the vibration suppression sheet 188 b as the vibration suppression member 188 are disposed between the lifting drive meshing chain 150 and the lifting table 110. Is provided.
Therefore, the vibration suppression washer 188a and the vibration suppression sheet 188b suppress vibration propagation from the lifting drive engagement chain 150 to the lift table 110, so that the pair of lift drive engagement chains 150 are engaged with each other and the lift sprocket 140 is lifted. Vibrations that tend to occur due to the engagement between the lifting / lowering drive meshing chain 150 and the dimensional tolerance of each component constituting the meshing chain type lifting / lowering device 100 or the positional deviation during assembly. Stable lifting drive can be realized without telling.

  Further, as described above, the vibration generated due to the dimensional tolerance of each constituent member constituting the meshing chain type lifting device 100 and the positional deviation at the time of assembly is reduced by the vibration suppression washer 188a and the vibration suppression sheet 188b. Therefore, it is not necessary to process and assemble the constituent members constituting the meshing chain type lifting device 100 with high accuracy, and the work load in processing and disassembling work of each constituent member of the meshing chain type lifting device 100 is reduced. it can.

  Further, since the vibration suppression washer 188a is employed as the vibration suppression member 188, the vibration suppression washer 188a is attached to the fastening bolt 185 when the lifting table 110 is assembled to the upper end of the lifting drive engagement chain 150 using the fastening bolt 185. The vibration propagation to the lifting table 110 can be easily suppressed without loosening the work load by simply loosely fitting to the lifting table 110, and the vibration suppression washer 188a absorbs and blocks the vibration transmitted to the lifted object from the lifting table 110. Stable lifting / lowering transfer can be realized without inadvertently dropping the article to be lifted / lowered.

  In addition, since the vibration suppressing sheet 188b is used as the vibration suppressing member 188, the lifting table, which tends to be generated in the lifting table 110, is absorbed and reduced over the entire back surface of the lifting table 110. 110 loading surfaces can be provided.

The lifting drive meshing chain 150, the lifting table 110, the table side bracket 181 constituting the table mounting means 180, the chain side bracket 182, the chain end mounting plate 183, and the chain side spacer 184 are formed from a damping material. Yes.
Therefore, vibrations propagated to these components can be absorbed and attenuated in terms of material, so that engagement between the pair of lifting drive engagement chains 150, engagement of the lift sprocket 140 and the lifting drive engagement chain 150, etc. The effect is enormous, for example, it is possible to realize a stable raising / lowering drive without transmitting vibration generated due to the above to the object to be lifted / lowered.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of a meshing chain lifting device that is an embodiment of the present invention. The perspective view of the state which removed the raising / lowering table and the panta arm from FIG. FIG. 3 is a partially enlarged view of the vicinity of the lifting sprocket shown in FIG. 2. The perspective view which shows the disassembled assembly state of the raising / lowering drive meshing chain, and the disengagement state. The perspective view which looked at the raising / lowering table from the lower side centering on a table attachment means. An exploded view of the table mounting means. The usage aspect figure of a vibration suppression washer. The usage aspect figure of a vibration suppression sheet | seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Meshing chain type lifting device 110 ... Lifting table 120 ... Base plate 130 ... Sprocket drive shaft 140 ... Lifting sprocket 150 ... Lifting driving meshing chain 151 ... Hook-shaped Internal tooth plate 152 ... Hook-shaped external tooth plate 153 ... Bush 154 ... Roller 155 ... Connecting pin 160 ... Drive motor 161 ... Drive side sprocket 162 ... Power transmission chain 163 ... Synchronous gear group 170 ... Chain guide plate 180 ... Table mounting means
181 ... Table side bracket 182 ... Chain side bracket 183 ... Chain end mounting plate 184 ... Chain side spacer 185 ... Fastening bolt 186 ... Bolt hole 187 ... Metal washer 188・ ・ ・ Vibration suppression member 188a ・ ・ ・ Vibration suppression washer 188b ・ ・ ・ Vibration suppression sheet 190 ・ ・ ・ Chain storage means 191 ・ ・ ・ Winding type chain storage box 192 ・ ・ ・ Linear storage rail 193 ・ ・ ・Lifting auxiliary guide means 194 ... inner arm 195 ... outer arm 196 ... slide rail

Claims (4)

A pair of lifting sprockets that face each other in the same plane and rotate forward and backward in the opposite direction around a pair of sprocket drive shafts juxtaposed parallel to the installation surface, and a horizontal direction by the pair of lifting sprockets A pair of lifting drive meshing chains that are engaged with each other while being vertically deflected from each other and are lifted in a self-supporting state, and are separated from each other while being deflected from the vertical direction to the horizontal direction by the pair of lifting sprockets. A meshing chain type lifting device comprising: a lifting table that is installed at the upper end of the lifting drive meshing chain and moves up and down integrally; and a drive source that drives the pair of lifting sprockets.
A mesh chain type lifting device, wherein a vibration suppressing member for suppressing vibration transmitted from the lifting drive meshing chain to the lifting table is provided between the lifting drive meshing chain and the lifting table.   2. The meshing chain type lifting device according to claim 1, wherein the vibration suppressing member is a vibration suppressing washer loosely fitted to a fastening bolt that fastens the lifting drive meshing chain and the lifting table.   The mesh chain type lifting device according to claim 1 or 2, wherein the vibration suppressing member is a vibration suppressing sheet provided on a back surface of the lifting table. The lifting / lowering driving engagement chain and / or the lifting / lowering table is formed of a damping material that attenuates vibration propagated to the lifting / lowering driving engagement chain and / or the lifting / lowering table. The meshing chain lifting apparatus according to any one of Items 3 to 4.

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