JP2009113872A - Meshing chain for driving lifting and lowering - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a meshing chain for driving lifting and lowering, capable of restraining contact oscillation or the like generated at a space to a lifting and lowering sprocket, providing improved durability of a bush, improved durability of the chain by restraining buckling, and improved meshing balance with the lifting and lowering sprocket in a chain width direction. <P>SOLUTION: This meshing chain 100 for driving lifting and lowering integrally includes an internal tooth plate 110, the bush 120, an external plate 150, and a joint pin 160, and is raised in an integral self-stand state while deflecting from a horizontal direction to a vertical direction, and is separated while deflecting from the vertical direction to the horizontal direction by the pair of the lifting and lowering sprocket S. The bush 120 integrally includes a plate side press fitting part 121 which is press-fitted to the internal tooth plate 110, and a sprocket meshing part 122 of which the diameter is larger than the one of the plate side press fitting part 121. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is incorporated in an elevating device that moves the elevating table in parallel with the installation surface for use in 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. It is related with the meshing chain for a raising / lowering drive.

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). ).
As such a meshing chain, a roller chain in which a roller is externally fitted to the bush in a rotatable state is employed.
Japanese Patent Laid-Open No. 11-278797 (in particular, see page 1 and FIG. 1)

  However, in the conventional meshing chain as described above, since the roller is loosely fitted to the bush, the central axis of the roller is unevenly distributed with respect to the central axis of the connecting pin or the bush when meshing with the sprocket. There is a problem that contact vibration and contact noise are generated between the roller and the sprocket, and due to such contact vibration between the roller and the sprocket, the meshing state between the pair of meshing chains is caused. There has been a problem in that a shift occurs, and as a result, vibration generated due to such a shift in the meshing state may be transmitted to the lifted object.

  In addition, in the meshing chain as described above, the roller is formed separately from the bushing and a sufficient thickness cannot be secured. Therefore, when lifting an object to be lifted such as a heavy object, the roller and the sprocket are There was a problem that the roller was easily damaged by such high load.

  Therefore, the present invention solves the conventional problems, that is, the object of the present invention is to suppress the contact vibration and contact noise generated with the lifting sprocket and improve the durability of the bush. In addition, the present invention provides a lifting drive meshing chain that reliably suppresses buckling that tends to occur in the chain width direction and achieves excellent chain durability and improves the meshing balance with the lifting sprocket in the chain width direction. That is.

  According to the first aspect of the present invention, an inner link unit in which a pair of front and rear bushes are press-fitted and fitted to a pair of left and right hook-like inner teeth plates is disposed on the outermost side in the chain width direction. A plurality of front and rear connecting pins that are press-fitted into a pair of front and rear pin holes of the outer tooth plate of the outer teeth plate are connected in the longitudinal direction of the chain. The inner tooth plates and the outer tooth plates facing each other are engaged with each other while being deflected to move upward in a self-supporting state, and the inner tooth plates are deflected from the vertical direction to the horizontal direction by the pair of lifting sprockets. In the elevating drive meshing chain that separates the outer tooth plates from each other and branches, the bush is the inner tooth plate By being integrally includes a large-diameter sprocket engagement portion from the plate side press-fit portion and the plate-side press-fit portion to press fit is obtained by solving the problems described above.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, a plurality of the inner link units are arranged in the chain width direction, thereby solving the above-described problem.

  Accordingly, the present invention provides a hook-shaped external tooth in which an inner link unit formed by press-fitting a pair of front and rear bushes to a pair of hook-shaped inner teeth plates spaced apart from each other on the left and right is disposed on the outermost side in the chain width direction. A large number of front and rear connecting pins that are press-fitted into a pair of front and rear pin holes in the plate are connected in the longitudinal direction of the chain, and are arranged opposite to a pair of elevating sprockets that mesh with the bush, while deflecting from the horizontal direction to the vertical direction. The internal tooth plates and the external tooth plates facing each other are meshed with each other and lifted in a self-supporting state while being deflected from the vertical direction to the horizontal direction by a pair of lifting sprockets, and the internal tooth plates and the external tooth plates To move the lifted object at a constant speed according to the rotation of the lifting sprocket. One rapidly not only be achieved, it is possible to obtain the specific effect as described below.

  According to the raising / lowering drive meshing chain of the present invention according to claim 1, the bush is integrally provided with a plate-side press-fitting portion for press-fitting to the inner tooth plate and a sprocket meshing portion having a larger diameter than the plate-side press-fitting portion. In the lifting drive meshing chain of the present invention, the sprocket for stable lifting comes in contact with the specified outer peripheral surface of the sprocket meshing part formed integrally with the bush. It is possible to prevent the center axis of the roller from being unevenly distributed with respect to the center axis of the connecting pin or bush when meshing with the sprocket for lifting and lowering, and in this way the bush and By preventing the occurrence of contact vibration with the lifting sprocket, deviation occurs in the meshing state between the pair of lifting drive meshing chains. Therefore, it is possible to realize a stable elevating operation without giving vibration to the object to be lifted / lowered due to such a shift in the meshing state, and for efficiently driving the elevating / lowering sprocket to lift / lower. It can be transmitted to the meshing chain.

Further, the present invention has a sprocket meshing portion larger in diameter than the plate-side press-fitting portion, so that the present invention is compared with a conventional meshing chain that employs a roller that is formed separately from the bushing and cannot secure a sufficient thickness. In the lifting drive meshing chain, the sprocket meshing part is formed integrally with the bushing to ensure a sufficient thickness, so that the sprocket meshing part is not affected by the load applied when lifting an object to be lifted such as a heavy object. Exhibits high load resistance and prevents fatigue failure of the bush.
In the lifting drive meshing chain of the present invention, since no roller is used and the number of parts of the chain can be reduced, it is possible to reduce the burden of disassembling and assembling work such as chain cutting.

  According to the lifting drive meshing chain of the present invention according to claim 2, in addition to the effect of the lifting drive meshing chain according to claim 1, a plurality of inner link units are arranged in the chain width direction. An external tooth plate and an internal tooth plate constituting one of the pair of lifting drive meshing chains are double-rows in the chain direction with respect to the external toothing plate and the internal tooth plate constituting the other lifting drive meshing chain. As a result, the hooks, so-called chucks, are engaged in multiple and strong engagements, so that it is possible to achieve excellent chain durability by reliably suppressing buckling that tends to occur in the chain width direction of the lifting drive engagement chain. Further, the meshing balance with the elevating sprocket in the chain width direction can be improved.

  The present invention relates to a hook-shaped external tooth plate in which an inner link unit formed by press-fitting a pair of front and rear bushes to a pair of left and right hook-shaped internal teeth plates is disposed on the outermost side in the chain width direction. A large number of front and rear connecting pins that are press-fitted into a pair of front and rear pins are connected in the longitudinal direction of the chain. The opposing internal tooth plates and external tooth plates are meshed with each other and lifted in a self-supporting state, and the internal tooth plates and the external tooth plates are respectively deflected while being deflected from the vertical direction to the horizontal direction by a pair of lifting sprockets. The plate side pressure at which the bushing is press-fitted into the internal tooth plate in the lifting / lowering interlocking chain that diverges and branches. And a sprocket meshing part larger in diameter than the plate-side press-fit part, which suppresses contact vibration and contact noise generated between the lifting sprocket and improves the durability of the bush. Any specific embodiment is possible as long as buckling that tends to occur in the direction is reliably suppressed to achieve excellent chain durability and improve the meshing balance with the elevating sprocket in the chain width direction. It doesn't matter what it is.

For example, regarding the specific shapes of the internal tooth plate, the external tooth plate, and the intermediate tooth plate used in the lifting drive meshing chain of the present invention, the same type of plates facing each other are meshed with each other from the horizontal direction. Any shape may be used as long as it rises in a self-supporting state while being deflected in the vertical direction, and is disengaged and branched while being deflected from the vertical direction to the horizontal direction.
Further, the number of rows of the inner link units arranged in parallel in the chain width direction in the lifting drive meshing chain of the present invention may be either a single row or a double row such as two rows or three rows. When a plurality of units are arranged in the chain width direction, the external tooth plate and the internal tooth plate that constitute one of the pair of lifting drive meshing chains constitute the other lifting drive meshing chain that faces the other. Buckling that tends to occur in the chain width direction of the lifting / lowering engagement chain because the outer tooth plate and the inner tooth plate are engaged in multiple hooks, so-called chucks, in multiple rows in the chain direction. Can be reliably suppressed, and excellent chain durability can be realized, and the meshing balance with the lifting sprocket in the chain width direction can be improved.

  And, the meshing chain type lifting device incorporating the lifting drive meshing chain according to the present invention can move up and down regardless of whether the installation surface is a floor surface in a stationary installation form or a ceiling surface in a suspended installation form. There is no hindrance, and there is no hindrance to the advancing / retreating operation corresponding to the above-described lifting / lowering operation even with a vertical wall surface in a cantilevered support form.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a lifting drive meshing chain 100 according to an embodiment of the present invention will be described with reference to the drawings.
Here, FIG. 1 is a view showing a usage mode using an elevating drive meshing chain according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a state in which the elevating table and the panta arm are removed from FIG. FIG. 3 is a partially enlarged view of the lifting drive meshing chain, FIG. 4 is a partial cross-sectional view of the lifting drive meshing chain, and FIG. 5 is a diagram of the lifting drive meshing chain and the lifting sprocket. It is explanatory drawing which shows a meshing state.

  First, as shown in FIG. 1, the lifting / lowering interlocking chain 100 according to the first embodiment of the present invention has a lifting table T on which an object to be lifted (not shown) such as a heavy load is mounted parallel to the installation surface. In order to move up and down, it is used by being incorporated in a mesh chain type lifting device E installed in a stationary state on the work floor.

  As shown in FIGS. 1 and 2, the above-described meshing chain type lifting device E is mounted in parallel with the base plate P installed on the installation surface on which the lifting table T described above is lifted in parallel. A pair of elevating sprockets S that are opposed to each other in the same plane around the pair of rotating shafts and rotate in the opposite direction in the opposite direction, and the elevating table T is raised and lowered by being disengaged from the pair of elevating sprockets S Basically, a pair of lifting drive mesh chains 100, the lifting table T which is fixed to the upper end of the lifting drive mesh chains 100 and moves up and down, and a drive motor M which drives a pair of lifting sprockets S are basically provided. Equipped as a simple device configuration.

1 and FIG. 2 are a pair of drive-side sprockets arranged coaxially on the output shaft side of the drive motor M, and the reference C is a power from the drive-side sprocket D to the pair of lift sprockets S side. G is a pair of power transmission chains comprising a roller chain for transmission. Reference numeral G represents a speed change in one direction from the pair of power transmission chains C and forward and reverse rotation in opposite directions to the pair of elevating sprockets S. a transmission gear group for transmitting power to, symbol a is the inner arm a ₁ and the outer arm called X-shaped pantograph arm disposed between the base plate P with lift table T installation surface side a lift assist guide means of the upper and lower two-stage connection configuration consisting of a ₂ Prefecture, reference numeral R, the slide the lower end of the inner arm a ₂ slides in accordance with the vertical movement A Lumpur, symbol B is a winding type chain storing box for storing the one of the pair of lift drive engagement chains 100 branched off bite each other.

The raising / lowering engagement chain 100 of this embodiment used in a pair in the engagement chain type lifting device E is a so-called chuck chain, and is separated as a pair on the left and right sides as shown in FIGS. An inner link unit 130 formed by press-fitting a pair of front and rear bushes 120 to the arranged hook-shaped inner tooth plate 110 is arranged in parallel via two hook-shaped intermediate tooth plates 140 in the chain width direction. In addition, a large number of inner link units 130 are connected in the longitudinal direction of the chain by a pair of front and rear connection pins 160 that are press-fitted into a pair of front and rear pin holes of a hook-shaped external tooth plate 150 arranged on the outermost side in the chain width direction. Is.
As described above, by arranging the inner link units 130 in parallel in the chain width direction, the external tooth plate 150, the internal tooth plate 110, and the intermediate tooth plate 140 that constitute one of the pair of lifting drive mesh chains 100, The outer tooth plate 150, the inner tooth plate 110, and the intermediate tooth plate 140 constituting the other lifting / lowering driving mesh chain 100 facing each other are hook-shaped, so-called chuck-shaped, over double rows in the chain direction. By engaging multiple and firmly, buckling that tends to occur in the chain width direction of the lifting drive engagement chain 100 can be reliably suppressed, and the engagement balance with the lifting sprocket S in the chain width direction can be improved. Yes.

  Further, as shown in FIGS. 3 to 5, the pair of raising / lowering driving mesh chains 100 are disposed opposite to the pair of raising / lowering sprockets S and are opposed to each other while being deflected from the horizontal direction to the vertical direction. The tooth plates 110, the outer tooth plates 150, and the intermediate tooth plates 140 are engaged with each other so as to rise together in a self-supporting state. The inner tooth plates 110, the outer tooth plates 150, and the intermediate tooth plates 140 are disengaged and branched while being deflected toward each other.

Therefore, a specific form of the bush 120, which is the most characteristic feature of the lifting / lowering engagement chain 100 of this embodiment, will be described in detail with reference to FIGS.
First, as shown in FIGS. 3 to 5, the bush 120 is integrally provided with a plate-side press-fitting portion 121 that is press-fitted to the internal tooth plate 110, and a sprocket meshing portion 122 having a larger diameter than the plate-side press-fitting portion 121. Yes.
By forming the bush 120 in this manner, as shown in FIG. 5, the specified outer peripheral surface of the sprocket engagement portion 122 makes stable contact with the lifting sprocket S, so that a conventional engagement chain using a roller is used. As described above, the center axis of the roller is unevenly distributed with respect to the center axis of the connecting pin or the bush when engaged with the sprocket, thereby preventing contact vibration and contact noise from occurring with the sprocket.
Furthermore, compared with the conventional meshing chain that employs a roller that is molded separately from the bushing and cannot secure a sufficient thickness, the sprocket meshing portion 122 is integrated with the bushing 120 in the lifting drive meshing chain 100 of the present invention. As a result, it is possible to secure a sufficient thickness, and as a result, the sprocket meshing portion 122 exhibits a high load resistance performance against a load applied when lifting an object to be lifted such as a heavy object.

The lifting drive meshing chain 100 of the present embodiment thus obtained includes a plate-side press-fitting portion 121 in which the bush 120 is press-fitted to the inner tooth plate 110, and a sprocket meshing portion 122 having a larger diameter than the plate-side press-fitting portion 121. Is integrated.
Therefore, in the lifting / lowering driving engagement chain 100 of the present invention, since the specified outer peripheral surface of the sprocket engagement portion 122 formed integrally with the bush 120 is in stable contact with the lifting / lowering sprocket S, conventional engagement using a roller is performed. It can be prevented that the center axis of the roller is unevenly distributed with respect to the center axis of the connecting pin or the bush when meshing with the sprocket like a chain, and contact vibration and contact noise are generated between the roller and the sprocket.

  In addition, by suppressing the occurrence of contact vibration between the bush 120 and the lifting sprocket S in this way, it is possible to avoid a shift in the meshing state between the pair of lifting drive mesh chains 100. Therefore, it is possible to realize a stable lifting operation without giving vibration generated due to such a shift in the meshing state to the object to be lifted and to efficiently lift and lower the driving chain of the lifting sprocket S. Can be communicated to.

Further, the bush 120 includes a sprocket meshing portion 122 having a larger diameter than the plate-side press-fit portion 121.
Therefore, compared with the conventional meshing chain that employs a roller that is molded separately from the bush and cannot secure a sufficient thickness, the sprocket meshing portion 122 is molded integrally with the bushing 120 in the lifting chain meshing chain 100 of the present invention. Since the sufficient thickness is secured, the sprocket meshing portion 122 exerts a high load resistance performance against the load applied when lifting an object to be lifted such as a heavy object, and the bushing 120 is fatigued. It can be prevented from occurring.

  Further, in the lifting drive meshing chain 100 of the present invention, since no roller is used and the number of parts of the chain can be reduced, it is possible to reduce the burden of disassembling and assembling such as chain cut-off.

A plurality of inner link units 130 are arranged in the chain width direction.
Therefore, the external tooth plate 150, the internal tooth plate 110, and the intermediate tooth plate 140 that constitute one of the pair of lifting drive mesh chains 100 are the external tooth plate 150 that constitutes the other lift drive mesh chain 100 that faces the other. And the inner tooth plate 110 and the intermediate tooth plate 140 are engaged in multiple hooks, so-called chucks, in multiple chains in the chain direction, so that they are generated in the chain width direction of the lifting drive engagement chain 100. The effects are enormous, as it is possible to reliably suppress the buckling that tends to occur and to realize excellent chain durability and to improve the meshing balance with the elevating sprocket S in the chain width direction.

The use aspect figure using the meshing chain for raising / lowering drive which is one Example of this invention. The perspective view of the state which removed the raising / lowering table and the panta arm from FIG. The partial enlarged view of the meshing chain for a raising / lowering drive. The partial cross section figure of the meshing chain for raising / lowering drive. Explanatory drawing which shows the meshing state of the raising / lowering drive meshing chain and the raising / lowering sprocket.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Lifting drive meshing chain 110 ... Internal tooth plate 120 ... Bush 121 ... Plate side press-fit part 122 ... Sprocket meshing part 130 ... Inner link unit 140 ... Intermediate tooth plate 150・ ・ ・ External tooth plate 160 ・ ・ ・ Connecting pin E ・ ・ ・ Engagement chain type lifting device S ・ ・ ・ Elevating sprocket T ・ ・ ・ Lifting table P ・ ・ ・ Base plate M ・ ・ ・ Drive motor D ・ ・ ・ Drive Side sprocket C ・ ・ ・ Power transmission chain G ・ ・ ・ Transmission gear group A ・ ・ ・ Lifting auxiliary guide means A ₁・ ・ ・ Inner arm A ₂・ ・ ・ Outer arm R ・ ・ ・ Slide rail B ・ ・ ・ Chain storage box

Claims (2)

A pair of front and rear pins of a hook-shaped outer tooth plate in which an inner link unit is formed by press-fitting a pair of front and rear bushes to a pair of left and right hook-shaped inner tooth plates. A large number of connecting pins in the longitudinal direction of the chain are connected by a pair of front and rear connecting pins that are press-fitted into the holes, and are opposed to the pair of elevating sprockets that mesh with the bushes, and are opposed to each other while being deflected from the horizontal to the vertical. The tooth plates and the external tooth plates are engaged with each other and lifted in a self-supporting state, and the internal and external tooth plates are disengaged while being deflected from the vertical direction to the horizontal direction by the pair of lifting sprockets. In the lifting drive meshing chain,
The lifting drive meshing chain, wherein the bushing is integrally provided with a plate-side press-fitting portion that is press-fitted into the internal tooth plate and a sprocket meshing portion having a larger diameter than the plate-side press-fitting portion. 2. The lifting drive meshing chain according to claim 1, wherein a plurality of the inner link units are arranged in the chain width direction.

Images