JP4970162B2 - Engagement chain type lifting device - Google Patents

Description

  The present invention is used for manufacturing equipment in various manufacturing fields, transport equipment in the transportation field, 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 lifting device that employs a meshing chain as a drive medium for lifting and lowering operation.

Conventionally, as a lifting device that lifts and lowers an object to be lifted such as a heavy object, it is configured such that a plurality of cross links that lift and lower the lifting platform while being parallel to the fixed base are driven up and down by an electric motor type ball screw mechanism (See Patent Document 1).
In addition, there is a meshing chain that meshes with each other and moves up and down integrally, that is, a lifting device that lifts and lowers an object using a so-called chuck chain. (See Patent Document 2).
Japanese Patent Laid-Open No. 11-193199 (see especially page 1, FIG. 1) Japanese Patent Laid-Open No. 11-278797 (in particular, see page 1 and FIG. 1)

  However, the former lifting device using the electric motor type ball screw mechanism incorporates the electric motor type ball screw mechanism so that the plurality of cross links are driven to move up and down. In relation to the above, there is a problem in raising and lowering operations that cannot be achieved at a constant speed and quickly, and it is extremely difficult to adjust and change the raising and lowering height, and this electric motor type ball screw mechanism is located directly under the lifting platform. Therefore, the lowering position of the lifting platform cannot be lowered by the height dimension of the electric motor type ball screw mechanism, that is, the lifting platform cannot be lowered, and the object to be lifted with respect to the lifting platform cannot be lowered. There was a problem in raising and lowering work that forced a large work load to carry in and out.

  Further, since the lifting device using the latter meshing chain is not sufficiently associated with the lifting control of the load support member and the drive control of the motor driving the meshing chain, the lifting operation of the load support member is not applicable in various fields. There is a problem that it does not always correspond to the various lifting operations required, and storage guides for pulling the lowering mesh chain into a spiral state are arranged in the form of vertical walls near the pair of sprockets. Therefore, the lowered position of the load support member cannot be lowered by the height dimension of the pair of vertical guide surfaces and the storage guide portion, that is, the load support member cannot be lowered, and the load support member cannot be lowered. There was a problem in raising and lowering work in which a large work load was imposed on carrying out and carrying in the raised and lowered objects.

  Therefore, the technical problem to be solved by the present invention, that is, the object of the present invention is to reliably and easily control the positioning of the lifting table and to lower the lowest descending position of the lifting table to raise and lower the lifting table. It is an object of the present invention to provide a meshing chain type lifting device that greatly reduces the carry-in / load-in operation with respect to and the maintenance work for the lifting mechanism.

  First, the invention according to claim 1 is 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 rotating shafts arranged parallel to the installation surface. Immediately after the deflection drive from the horizontal direction to the vertical direction by the pair of elevating sprockets, they are lifted together in a self-supporting state, and at the same time, when the deflection drive from the vertical direction to the horizontal direction is performed by the pair of elevating sprockets A pair of lifting drive meshing chains that are disengaged and branched; a lifting table that is fixed to the upper end of the lifting drive meshing chain and that moves up and down integrally; and a drive motor that drives and controls the pair of lifting sprockets. In the above-mentioned meshing chain type lifting device, a storage rail for pulling in at least one of the meshing chains for lifting and lowering that are separated from each other is provided for the pair of lifting and lowering devices. A chain tip detection sensor that is laid from the procket toward the lowermost position of the lifting table and detects the retracted position of the lifting drive meshing chain and transmits it to the drive motor side is disposed along the storage rail. An interlocking chain type lifting device characterized by being made.

  The invention according to claim 2 further solves the above-described problem in the meshing chain type lifting device according to claim 1, wherein the drive motor is spaced apart in the peripheral region of the lowest descending position of the lifting table. It is a thing.

  A meshing chain lifting device of the present invention includes a pair of lifting sprockets that face each other in the same plane and rotate forward and backward in opposite directions around a pair of rotating shafts arranged parallel to the installation surface, The pair of elevating sprockets mesh with each other immediately after being driven to deflect from the horizontal direction to the vertical direction and rise together in a self-supporting state, while the pair of elevating sprockets mesh with each other during the deflection drive from the vertical direction to the horizontal direction. A pair of lifting drive meshing chains that diverge and branch, a lifting table that is fixed to the upper end of the lifting drive meshing chain and that moves up and down integrally, and a drive motor that drives and controls the pair of lifting sprockets. Therefore, the lifting table can be controlled up and down in accordance with the forward and reverse rotation of the lifting sprocket regardless of the lifting position. With the lifting operation can be achieved 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.

  That is, in the meshing chain type lifting device according to the first aspect of the present invention, the storage rail that pulls in at least one of the lifting and lowering driving meshing chains that is branched is directed from the pair of lifting sprockets toward the lowermost position of the lifting table. The lowering position of the lifting table is lowered, i.e., the lowering of the lifting table without considering the height of the storage space due to the lifting of the lifting drive meshing chain as in the prior art. Since flooring is possible, it is possible to greatly reduce the work load of carrying the object to and from the lifting table and to easily perform maintenance of the lifting drive meshing chain.

  In addition, a chain end detection sensor that detects the retracted position of the lifting drive meshing chain and transmits it to the drive motor side is arranged along the storage rail, so that the chain end detection sensor detects the pull-up drive meshing chain. The horizontal movement distance of the lifting drive meshing chain corresponds one-to-one with the lifting movement distance of the lifting table, so that it can be lifted and lowered without being affected by the undulation angle of the cross link and the screwing pitch of the ball screw as in the prior art. The positioning of the table can be reliably and simply controlled on the drive motor side.

  According to the second aspect of the present invention, in the meshing chain type lifting device according to the first aspect, the drive motor is spaced apart from the lowermost position of the lift table so that the height dimension of the drive motor is increased. The floor of the lifting table can be lowered without considering the amount of work, so that the work load for loading and unloading objects to and from the lifting table can be greatly reduced, and the drive motor is used for maintenance of the lifting mechanism. However, it is possible to achieve a safe and simple maintenance work without causing a work obstacle.

  A meshing chain lifting device of the present invention includes a pair of lifting sprockets that face each other in the same plane and rotate forward and backward in opposite directions around a pair of rotating shafts arranged parallel to the installation surface, These pair of lifting sprockets mesh with each other immediately after being driven to deflect from the horizontal direction to the vertical direction and rise together in a self-supporting state, while the pair of lifting sprockets mesh with each other during deflection driving from the vertical direction to the horizontal direction. A pair of lifting drive meshing chains that diverge and branch; a lifting table that is fixed to the upper end of the lifting drive meshing chain and that moves up and down integrally; and a drive motor that drives and controls the pair of lifting sprockets. A storage rail that pulls in at least one of the drive meshing chains that has been separated and separated from the pair of lifting sprockets is the lowest position of the lifting table A chain tip detection sensor is installed along the storage rail to detect the pull-in position of the lifting drive meshing chain and transmit it to the drive motor side to ensure positioning of the lifting table. A specific embodiment of the present invention, as long as it can control easily and lower the lowest descending position of the lifting table to greatly reduce the work for carrying in / out the lifted table and the maintenance work for the lifting mechanism. Can be anything.

  For example, the mesh chain type lifting device of the present invention has no problem in 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.

  Further, the raising / lowering engagement chain used in the engagement chain type lifting apparatus of the present invention is a so-called chuck chain, and is engaged with each other immediately after the pair of raising / lowering sprockets are driven to deflect from the horizontal direction to the vertical direction. Any specific chain configuration may be used as long as it is lifted up in a self-supporting state and is bifurcated by a pair of elevating sprockets when they are deviated from each other and deflected from the vertical direction to the horizontal direction. For example, it may be any one having a roller, one having a bush, a single row in the chain width direction, a double row in the chain width direction, or a combination thereof.

The chain tip detection sensor used in the meshing chain lifting device of the present invention can detect the pull-in position of the lifting drive meshing chain while being arranged along the storage rail, and transmit it to the drive motor side. If this is the case, the specific form of the chain tip detection sensor may be any form, for example, a magnetic proximity sensor that detects the magnetism of the approaching lifting chain meshing chain, or approaching. It is preferable to use a proximity sensor such as a photoelectric proximity sensor that detects the presence or absence of the lifting drive meshing chain.
Further, the number of the chain tip detection sensors may be appropriately increased or decreased according to the drive control pattern desired by the lifting table as long as it is at least one or more.

  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 ensure a stable lifting operation of this lifting table. It is desirable to interpose a lifting assist guide means between the lifting table and the installation surface side. A specific form of the lifting assist guide means is an X-shaped pantar arm used for a scissor lifter or the like. Alternatively, a telescopic pipe used for a guide post lifter or the like may be used.

An embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 is an overall perspective view of the meshing chain type lifting device according to the first 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 view showing the disengagement state of the lifting drive engagement chain used in this embodiment, and FIG. FIG. 6 is a side view showing the most raised position of the meshing chain type lifting device according to the present embodiment, FIG. 6 is a side view showing the lowest position of the meshing chain type lifting device according to the present embodiment, and FIG. FIG. 5 is a relative view between the table elevating position and the retracting position of the lifting drive meshing chain.

  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 on which a heavy object (not shown) is mounted in parallel to the installation surface. Therefore, it is installed on the work floor.

  As shown in FIGS. 1 to 4, the meshing chain type lifting device 100 of the present embodiment is parallel to the base plate 120 installed on the installation surface on which the lifting table 110 is lifted and lowered in parallel. A pair of elevating sprockets 140, 140 that are opposed to each other in the same plane and rotate in the opposite direction in the opposite direction around a pair of rotating shafts 130, 130 arranged in parallel, and a pair of these elevating sprockets 140, 140 A pair of lifting drive engagement chains 150 and 150 that lift and lower the lifting table 110 by being disengaged with each other, and the lifting table 110 that is fixed to the upper ends of the lifting drive engagement chains 150 and 150 and moves up and down integrally, A drive motor 160 that drives and controls the pair of elevating sprockets 140 and 140 is a basic device structure. It has as.

  Reference numerals 161 and 161 shown in FIGS. 1 and 2 are a pair of drive side sprockets arranged coaxially on the output shaft side of the drive motor 160, and reference numerals 162 and 162 are a pair of lifts from the drive side sprockets 161 and 161. 3 is a pair of power transmission chains comprising a roller chain for transmitting power to the sprockets 140, 140 side. Reference numeral 163 shown in FIG. 3 is a transmission gear group for transmitting power to the elevating sprockets 140 and 140 so as to rotate in the forward and reverse directions opposite to each other. Reference numeral 164 shown in FIG. This is a chain guide plate for guiding and moving the pair of lifting drive engagement chains 150 and 150 that are detached.

  Here, as shown in FIG. 1, the drive motor 160 is spaced apart from the area around the lowest position of the lift table 110, that is, outside the area under the projection umbrella of the lift table 110.

  Further, the pair of lifting drive engagement chains 150 and 150 used in the engagement chain type lifting apparatus 100 of this embodiment is a so-called chuck chain, and as shown in FIG. A plate 151, a hook-shaped outer tooth plate 152 that overlaps the inner tooth plate 151 by a half pitch, a bush 153 that connects and fixes the inner tooth plates 151 in the chain width direction, and an outer fit to the bush 153. The rollers 154 and the connecting pins 155 for connecting and fixing the external tooth plates 152 in the chain width direction are respectively knitted in two rows in the chain width direction, and these pairs of lifting sprockets 140 and 140 are used in the horizontal direction. Immediately after the deflection drive in the vertical direction from each other, they mesh with each other and ascend in a self-supporting state, and a pair of lifting sprockets Is adapted to branch from the vertical direction deviates bite each other during deflection drive the horizontal direction by the socket 140, 140.

Further, as shown in FIG. 1, the auxiliary guide means for raising and lowering two-stage connection comprising an inner arm 171 and an outer arm 172 called an X-shaped panter arm between the lifting table 110 and the base plate 120 on the installation surface side. By interposing 170, the elevating table 110 is configured to guide a stable elevating operation.
1 is a slide rail in which the lower end of the inner arm 171 slides in accordance with the raising / lowering operation, and the reference numeral 174 is provided at the lower end of the inner arm 171 and slides along the slide rail 173. It is a slider for.

One of the pair of lifting drive meshing chains 150 and 150 that are separated from each other and branched is housed in a chain housing means 180 including a winding-type storage box 181 disposed on the drive motor 160 side. The other of the pair of lifting drive engagement chains 150, 150 is configured to be stored in a chain storage means 180 including a linear storage rail 182 disposed on the opposite side facing the drive motor 160.
That is, the chain storage means 180 composed of the storage box 181 and the storage rail 182 is directed from the pair of lift sprockets 140, 140 toward the lowermost position of the lift table 110, in other words, under the projection umbrella of the lift table 110. It is laid in a state of being spaced apart outside the area.
Reference numeral 183 in FIG. 1 and the like is a rail safety cover made of a non-magnetic material for laying the chain storage means 180 and protecting the lifting drive meshing chain 150.

Here, the pulling positions P0, P1, P2,..., Pn of the lifting / lowering engagement chain 150, which is the most characteristic of the engagement chain type lifting / lowering apparatus 100 according to the first embodiment of the present invention, is detected and the drive motor 160 is detected. As shown in FIG. 1 and the like, a chain tip detection sensor 190 that transmits to the side is disposed along the storage rail 182 described above.
That is, the chain tip detection sensor 190 is composed of a plurality of magnetic proximity sensors 191 that detect the magnetism of the approaching lifting drive mesh chain 150.
When the above-described lifting drive meshing chain 150 is made of non-magnetic stainless steel (SUS) or the like, the striker made of a magnetic material is provided on the lifting drive meshing chain 150, so that the striker It is also possible to detect this magnetism by the chain tip detection sensor 190 and transmit it to the drive motor 160 side.

Also, reference numeral 192 shown in FIG. 2 is a transmission for transmitting the detection signals of the retracted positions P0, P1, P2,..., Pn detected by the magnetic proximity sensor 191 to the drive motor 160 side for driving control. Wiring.
Further, a detection signal relating to the pull-in state of the lifting / lowering driving engagement chain 150 via the transmission wiring 192 is transmitted from the magnetic proximity sensor 191 to the drive motor 160 side through a controller, a motor control circuit, and the like, and then driven and controlled. Needless to say, power is transmitted from the pair of drive-side sprockets 161 and 161 to the pair of elevating sprockets 140 and 140 via the pair of power transmission chains 162 and 162 by the output on the drive motor 160 side.
Therefore, it is also possible to switch the start / stop speed of the lifting / lowering operation and the lifting / lowering speed between them by using the detection signals of the pull-in positions P0, P1, P2,. It is also possible to exhibit a positioning function for stopping the lens at a predetermined position between the lowest position and the highest position.

Next, the raising / lowering operation of the meshing chain type lifting / lowering apparatus 100 according to the first embodiment of the present invention will be described with reference to FIGS.
First, as shown in FIG. 5, when the lifting table 110 is raised toward the highest position, the pair of lifting drive mesh chains 150, 150 are moved by the pair of lifting sprockets 140, 140 by the storage box 181 and the storage rail. Each of the pair of lifting drive engagement chains 150 and 150 is fed out from the chain storage means 180 made of 182 so that the output of the drive motor 160 is supported while supporting the entire weight of the lifting table 110 on which a heavy object (not shown) is mounted. In response, it rises at a constant speed and quickly.
Note that the above-described lifting / lowering guide means 170 composed of an inner arm 171 and an outer arm 172 called an X-shaped panter arm, which are connected in a two-stage manner, guides the stable lifting operation of the lifting table 110. .

  At this time, as shown in FIG. 7, a plurality of magnetic proximity sensors that detect the pull-in positions P0, P1, P2,..., Pn of the raising / lowering driving engagement chain 150 on the storage rail 182 side and transmit them to the drive motor side. Since the chain end detection sensor 190 including the sensor 191 is disposed along the storage rail 182, the horizontal movement distance X (() of the lifting drive meshing chain 150 on the storage rail 182 detected by the chain end detection sensor 190 is increased. That is, the horizontal movement distance from P0 to Pn corresponds to the ascending / descending movement distance Y of the ascending / descending table 110 on a one-to-one basis (X = Y), so that the ascending / descending table 110 is positioned on the drive motor 160 side. Drive control is assured and simple.

On the other hand, as shown in FIG. 6, when the elevating table 110 is lowered toward the lowest position, the pair of elevating driving mesh chains 150, 150 are linearly connected to the chain storage box 181 by the pair of elevating sprockets 140, 140. The pair of elevating drive engagement chains 150 and 150 are respectively drawn while being branched into the chain accommodating means 180 composed of the shape storage rails 182, and support the entire weight of the elevating table 110 on which a heavy object (not shown) is mounted. However, it descends at a constant speed and rapidly according to the output of the drive motor 160.
Note that the above-described lifting auxiliary guide means 170 composed of an X-shaped inner arm 171 and outer arm 172 in a two-stage upper and lower connection configuration guides a stable lowering operation of the lifting table 110 while being folded.

  At this time, as shown in FIG. 7, the horizontal movement distance (that is, the horizontal movement distance from Pn to P0) of the raising / lowering driving engagement chain 150 on the storage rail 182 detected by the chain tip detection sensor 190 is as follows. Since it corresponds to the moving distance of the descending lifting table 110 on a one-to-one basis (X = Y), the positioning of the descending lifting table 110 is reliably and simply driven and controlled on the drive motor 160 side.

  As described above, the meshing chain lifting apparatus 100 according to the first embodiment of the present invention can achieve the lifting / lowering operation of the lifting / lowering table 110 at a constant speed and quickly, and includes a drive portion including the chain storage means 180 and the drive motor 160. In addition, the storage rail 182 that pulls in at least one of the lifting drive meshing chains 150 that has been separated from the pair of lifting sprockets 140, 140 is located around the lowest lowered position of the lifting table 110. By laying toward the area, it is possible to reduce the floor of the lifting table 110 without considering the height of the storage space by winding up the meshing chain as in the prior art. The work load for unloading / carrying the object to be lifted can be greatly reduced, and the lifting drive meshing chain 1 0 of the maintenance maintenance can be easily achieved.

  Further, a chain end detection sensor 190 that detects the pull-in positions P0, P1, P2,..., Pn of the raising / lowering driving meshing chain 150 and transmits it to the drive motor 160 side is disposed along the storage rail 182. Therefore, the horizontal movement distance X of the lifting drive engagement chain 150 on the storage rail 182 detected by the chain tip detection sensor 190 corresponds to the lifting movement distance Y of the lifting table 110 on a one-to-one basis (X = Y). The positioning of the elevating table 110 can be reliably and simply driven and controlled on the drive motor 160 side without being affected by the undulation angle of the cross link and the screwing pitch of the ball screw as in the prior art. Is enormous.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of a meshing chain lifting device that is a first 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 a lifting drive sprocket shown in FIG. 2. The figure which showed the disengagement state of the raising / lowering drive engagement chain used in the present Example. The side view which shows the highest raising position of the meshing chain type raising / lowering apparatus which is a present Example. The side view which shows the lowest fall position of the meshing chain type raising / lowering apparatus which is a present Example. The relative relationship figure of a table raising / lowering position and a chain drawing-in position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Meshing chain type lifting device 110 ... Lifting table 120 ... Base plate 130 ... Rotating shaft 140 ... Lifting sprocket 150 ... Lifting driving meshing chain 151 ... Inside of hook shape Tooth plate 152 ... Hook-shaped external tooth plate 153 ... Bush 154 ... Roller 155 ... Connection pin 160 ... Drive motor 161 ... Drive side sprocket 162 ... Power transmission chain 163 ··· Transmission gear group 164 ··· Chain guide plate 170 ··· Lifting assist guide means 171 · · · Inner arm 172 · · · Outer arm 173 · · · Slide rail 174 · · · Slider 180 · · · Chain housing means 181 ... Retractable storage box 182 ... Straight line 183 ... Rail safety cover 190 ... Chain end detection sensor 191 ... Magnetic proximity sensor 192 ... Transmission wiring P0, P1, P2, ..., Pn ... For lift drive Pull-in position of the meshing chain 150 X: Elevating / lowering distance of the lifting table 110 Y: Horizontal moving distance of the lifting / lowering driving mesh chain 150

Claims (2)

A pair of elevating sprockets that are opposed to each other in the same plane and rotate forward and backward in the opposite direction around a pair of rotating shafts arranged parallel to the installation surface, and the pair of elevating sprockets from the horizontal direction Immediately after the vertical deflection drive, they are meshed with each other and lifted in a self-supporting state, and the pair of lift sprockets are separated from each other when they are deflected from the vertical direction to the horizontal direction when they are driven for deflection. In a meshing chain lifting device comprising a chain, a lifting table fixed to the upper end of the lifting drive meshing chain and lifting and lowering integrally, and a drive motor for driving and controlling the pair of lifting sprockets,
A storage rail that pulls in at least one of the lifting drive meshing chains that has been disengaged and branched is laid from the pair of lifting sprockets toward the lowermost position of the lifting table.
A meshing chain lifting device characterized in that a chain tip detection sensor that detects the retracted position of the lifting drive meshing chain and transmits it to the drive motor side is disposed along the storage rail. The meshing chain type lifting device according to claim 1, wherein the drive motor is spaced apart from the lowermost position of the lifting table.

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