JP2015001288A - Engagement chain drive device and movable body mobile device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engagement chain drive device capable of restricting vibration generated when the engagement chain is moved forward or rearward and a movable body mobile device capable of moving the movable body in a stable manner using the engagement chain drive device.SOLUTION: An engagement chain drive device 10 comprises an engagement chain 20 in which a pair of chain members 21A, 21B with pins 25A protruded toward side portions are engaged to each other to make an integral formation as they move in a forwarding direction and disengaged from each other and branched as they move in a retracting direction, and a rotating member 60 formed with a sliding groove extending gradually toward one side of a rotating shaft direction as it moves toward one side of its circumferential direction, with a forwarding or retracting direction under the engaged state of the engagement chain 20 as the rotating shaft direction. The pins 25A are slid along the sliding groove in response to the rotation of the rotating member 60 to enable the engagement chain 20 to be moved forward or rearward in the rotating shaft direction.

Description

  The present invention relates to a meshing chain driving device that drives a meshing chain that can move forward and backward, and a movable body moving device that moves a movable body such as a lifting table using the device.

  Conventionally, multiple pairs of chain members that can move forward and backward are integrated by meshing with each other as they move in the direction of travel, while they are unmated from each other as they move in the backward direction from their integrated meshing state. 2. Description of the Related Art An articulated chain drive device that drives an articulated chain that branches off in order to move forward and backward along its longitudinal direction is known. Recently, there has been proposed a mesh chain type lifting device (movable body moving device) that uses such a mesh chain driving device to move the lifting table (movable body) along the forward and backward movement direction of the mesh chain in the device. (For example, Patent Document 1).

  Such a meshing chain type lifting device includes a lifting table and a meshing chain driving device, and a lifting table is connected to an end portion of the meshing chain driving device on the traveling direction side of the meshing chain. In addition, the meshing chain drive device can be engaged with a chain member in which pins are protruded laterally from a plurality of positions spaced in the longitudinal direction and a pin of the chain member at a plurality of positions spaced in the circumferential direction. And a rotating member provided with a plurality of pins, and the meshing chain is driven by sequentially engaging the pins according to the rotation of the rotating member. In such a meshing chain drive device, the paired chain members are moved in the traveling direction according to the rotation direction of the rotating members and meshed with each other, or moved in the retreating direction so as to be disengaged from each other. The meshing chain is moved forward and backward.

JP 2011-144874 A

  By the way, in the above-described meshing chain drive device, when the meshing chain is driven by the rotation of the rotating member, the pins of the rotating member and the pins of the meshing chain are sequentially brought into contact with each other so as to be able to transmit power, thereby meshing. The chain can move forward and backward.

  For this reason, when the meshing chain is driven, the pin of the rotating member and the pin of the meshing chain are repeatedly brought into contact with and separated from each other in a short time, so that intermittent vibration is generated by the interaction between the pin of the rotating member and the pin of the meshing chain. There is a problem of doing.

  The present invention has been made in view of the above problems. An object of the present invention is to provide a meshing chain driving device capable of suppressing vibration generated when the meshing chain is moved forward and backward, and a movable body moving device capable of stably moving the movable body using the device. is there.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
The meshing chain drive device that solves the above problems has at least a pair of chain members that can move forward and backward, and the chain members that make a pair move in the advancing direction so that they mesh with each other and are integrated. When the chain members move in the retreating direction from the meshed state, the meshing chain is disengaged from each other and branches, and the chain members of the meshing chain mesh with each other and are integrated in a straight bar shape. A rotating member having a sliding groove that is rotated with the advancing / retreating direction as the rotation axis direction and extending gradually toward one side of the rotation axis direction toward the one side in the circumferential direction, The meshing chain has a sliding portion that can slide with the sliding groove of the rotating member, and the rotating member moves the sliding portion along the sliding groove according to the rotation of the rotating member. The meshing chain can be moved in the direction of the rotation axis by moving, and when rotating in the first direction, the meshing chain is moved in the advancing direction while meshing the chain members with each other, and the first chain When rotating in the second direction, which is opposite to the direction, the meshing chain is moved in the retraction direction while disengaging the chain members from each other.

  According to the above configuration, when the rotating member rotates in the first direction, the pair of chain members mesh with each other by sliding along the sliding groove so that the sliding portion moves toward the traveling direction. While doing so, the meshing chain moves in the traveling direction. Further, when the rotating member rotates in the second direction, the pair of chain members are engaged with each other while the pair of chain members are disengaged from each other by sliding along the sliding groove so that the sliding portion is directed toward the backward direction side. The chain moves in the backward direction. In this way, the meshing chain can be moved in the direction of the rotation axis of the rotating member, that is, the traveling direction and the retreating direction by sliding the sliding portion along the sliding groove in accordance with the rotation of the rotating member. For this reason, when the meshing chain is moved, the meshing chain and the rotating member do not repeat contact and separation in a short time. Therefore, it is possible to suppress vibration that occurs when the meshing chain is moved forward and backward.

  In the above-described meshing chain drive device, the rotating member is formed with a through-hole penetrating in the direction of the rotational axis, and the sliding groove is formed on an inner peripheral surface of the through-hole so that the chain members mesh with each other. It is desirable that the sliding portion is slidable with the sliding groove in a state where the meshing chain in a state is inserted through the through hole.

  According to the above configuration, the sliding portion of the meshing chain rotates with respect to the sliding groove of the rotating member in a state where the meshing chain in which the paired chain members are meshed with each other is inserted into the through hole of the rotating member. As the member rotates, it can slide. For this reason, since it becomes possible to arrange | position a meshing chain inside a rotating member, an apparatus can be reduced in size in the direction orthogonal to the rotating shaft direction of a rotating member.

In the above-described meshing chain driving device, it is desirable that the sliding groove is formed in a spiral shape in the rotation axis direction.
According to the above configuration, the meshing chain is movable in the advancing direction and the retreating direction by sliding the sliding portion along the sliding groove formed in a spiral shape. Here, the amount of movement of the meshing chain per unit rotational speed of the rotating member changes according to the interval between the spiral sliding grooves in the rotating shaft direction of the rotating member. That is, the rotating member can function as a transmission by forming the sliding groove in a spiral shape and changing the interval in the rotation axis direction.

The meshing chain drive device preferably further includes a columnar member that is slidable with the meshing chain inside the meshing chain in which the chain members are meshed with each other.
According to the above configuration, when the meshing chain in the meshing state is moved forward and backward, it is possible to prevent the meshing chain from being tilted or buckled so as to deviate from the direction of forward and backward movement.

In the above-described meshing chain drive device, it is desirable that the sliding portion is detachable from the meshing chain.
According to the above configuration, the slide groove and the sliding part are prepared, for example, several kinds of sliding parts that are ball-shaped or cylindrical, and can be exchanged with such arbitrary sliding parts as necessary. be able to.

  A movable body moving device that solves the above-described problem is arranged such that the above-described meshing chain drive device and the pair of chain members are meshed with each other so that the meshing chain can move in the advancing and retreating direction. A movable body that moves as the vehicle moves forward and backward.

  According to the said structure, in a movable body moving apparatus, the effect similar to the effect of the meshing chain drive device mentioned above can be acquired.

The perspective view of the raising / lowering apparatus of embodiment. The top view of the raising / lowering apparatus. The front view of the raising / lowering apparatus which abbreviate | omitted some structures and showed other partial structures in cross section. The perspective view of a meshing chain. Sectional drawing of a rotation member. The partial front view of the raising / lowering apparatus which shows the engagement relationship of a meshing chain and a rotation member. The partial front view of the raising / lowering apparatus which shows a mode that the raising / lowering table raised. It is a figure which shows the partial structure of the raising / lowering apparatus of a 1st modification, Comprising: (a) is a perspective view of a meshing chain, (b) is a front view which shows the engagement relationship of a meshing chain and a rotation member. It is a figure which shows the partial structure of the raising / lowering apparatus of a 2nd modification, Comprising: (a) is a perspective view of a meshing chain, (b) is a front view which shows the engagement relationship of a meshing chain and a rotation member. It is a figure which shows a partial structure of the raising / lowering apparatus of a 3rd modification, Comprising: (a) is a perspective view of a meshing chain, (b) is a front view which shows the engagement relationship of a meshing chain and a rotation member.

Hereinafter, an embodiment in which a movable body moving device including a meshing chain driving device is embodied as a lifting device will be described with reference to the drawings.
As shown in FIG.1 and FIG.2, the raising / lowering apparatus 10 is the baseplate 11 installed in the installation place of an apparatus, the raising / lowering table 12 as an example of the movable body which can support the to-be-moved body WO (refer FIG. 6), In order to raise and lower the elevating table 12, an engagement chain 20 that moves forward and backward along the longitudinal direction is provided. Further, the lifting device 10 includes a chain housing portion 30 in which the chain chain 20 in which the pair of chain members 21A and 21B are disengaged from each other and a chain housing portion 30 in which the chain members 21A and 21B are in mesh with each other and integrated. A columnar member 40 inserted inside the meshing chain 20 in a state and a drive unit 50 for moving the meshing chain 20 forward and backward are provided. In addition, the to-be-moved body WO may be a packaged product, a motor vehicle, etc., for example, and may be a worker for work in high places.

  As shown in FIG. 1, the base plate 11 and the lifting table 12 have a substantially rectangular plate shape in plan view. The base plate 11 is a part where, for example, the lifting device 10 is fixed by a fastening member such as a bolt in order to fix and arrange the lifting device 10 at an installation place, or a wheel is attached to make the lifting device 10 movable. On the other hand, the lifting table 12 moves up and down while the moving body WO is placed when the meshing chain 20 moves forward and backward as the drive unit 50 is driven. In the present embodiment, the direction in which the lifting table 12 is raised is the direction in which the meshing chain 20 moves in the traveling direction and the lifting table 12 is separated from the base plate 11, and the direction in which the lifting table 12 is lowered is that the meshing chain 20 is retracted. This is a direction in which the elevating table 12 approaches the base plate 11 by moving in the direction.

Next, the meshing chain 20 will be described with reference to FIGS. 3 and 4. In FIG. 4, a part of the configuration is omitted for easy understanding.
As shown in FIGS. 3 and 4, the meshing chain 20 connects at least a pair (in this embodiment, a pair) of chain members 21 </ b> A and 21 </ b> B and the chain members 21 </ b> A and 21 </ b> B at one end in the longitudinal direction of the meshing chain 20. And a connecting portion 22.

  As shown in FIG. 4, the chain members 21 </ b> A and 21 </ b> B each have a plurality of inner plates 23 and outer plates 24 that are sequentially connected in a series direction along the forward / backward moving direction. Furthermore, each chain member 21A, 21B includes a cylindrical bush 25 assembled between the inner plates 23 facing each other in a direction orthogonal to the advancing and retreating direction, and an inner plate 23 adjacent to each other with its end portions overlapping in the series direction. A pin 25 </ b> A is rotatably connected to the outer plate 24 while being inserted through the bush 25.

  The inner plate 23 and the outer plate 24 are formed with tooth portions 26 each having a substantially triangular shape when viewed from the axial direction of the bush 25 or the pin 25A. In other words, the end edge on the traveling direction side of the outer plate 24 (inner plate 23) in one chain member 21A and the end edge on the retreating direction side of the outer plate 24 (inner plate 23) in the other chain member 21B are engaged with each other. Possible teeth 26 are formed.

  And the meshing chain 20 will be in the meshing state of the rigid structure integrated in the shape of a straight bar, when each chain member 21A, 21B mesh | engages the tooth | gear part 26 mutually according to the movement to an advancing direction (ascending direction). On the other hand, the meshing chain 20 is branched to the left and right when the chain members 21A and 21B are disengaged from each other as the chain member 21A and 21B move in the retracting direction (downward direction).

  Further, bush insertion holes 23a and 23b are formed through the inner plate 23 in the thickness direction, and pin insertion holes 24a and 24b are formed through the outer plate 24 in the thickness direction. The chain members 21 </ b> A and 21 </ b> B are configured such that both ends of the bush 25 are fitted into the bush insertion holes 23 a and 23 b of the opposing inner plates 23, and the outer plate 24 is overlapped on the outer side of the inner plate 23. The pin 25A is inserted into the bush 25 from the pin insertion holes 24a, 24b of the outer plate 24 in series.

  As shown in FIG. 4, the connecting portion 22 includes a connecting plate 27 having a substantially trapezoidal shape when viewed from the axial direction of the bush 25 or the pin 25 </ b> A, and connecting pins 28 and 29 having a cylindrical shape. Yes. In the connection plate 27, pin insertion holes (not shown) having the same diameter as the outer diameters of the connection pins 28 and 29 are formed through the four corners in plan view in the thickness direction. The connecting pins 28 and 29 are shorter in length in the longitudinal direction than the pin 25A that rotatably connects the inner plate 23 and the outer plate 24 with the bush 25 inserted. And the connection part 22 connects the one end side in the longitudinal direction of chain member 21A, 21B which makes a pair using the connection plate 27 and the connection pins 28 and 29. FIG.

  Specifically, on one end side in the longitudinal direction of the pair of chain members 21A and 21B, the inner plate 23 of one chain member 21A and the inner plate 23 of the other chain member 21B connect the tooth portions 26 to each other. In the engaged state, the connecting plate 27 and the connecting pin 29 inserted into the two pin insertion holes on the retreat direction side are connected. A connecting pin 28 for connecting the opposing connecting plates 27 with a predetermined interval is inserted into the two pin insertion holes on the traveling direction side of the connecting plate 27. Thus, in this embodiment, the interlocking chain 20 is comprised by the connection part 22 connecting the end of the longitudinal direction of the chain members 21A and 21B which make a pair.

  As shown in FIG. 4, in the meshing chain 20, both ends of the pin 25 </ b> A in the longitudinal direction protrude greatly outward from the surface of the outer plate 24. Further, the chain members 21A and 21B mesh with each other and are integrated into a straight rod shape, and the meshing chain 20 in the meshing state is formed on the inner side of the bushing 25 and the inner plate 23 along the longitudinal direction of the meshing chain 20. An enclosed columnar space (gap) S is formed. In the following description, a state in which the chain members 21A and 21B that make a pair in the meshing chain 20 mesh with each other and are integrated into a straight bar shape is also referred to as a “meshing state”. A state in which the pair of chain members 21A and 21B in the meshing chain 20 are disengaged from each other from the meshing state and branched is also referred to as a “branching state”. That is, in FIG. 3, the meshing chain 20 on the lifting table 12 side is in a meshed state, and the meshing chain 20 on the base plate 11 side is in a branched state.

  As shown in FIG. 1, the chain storage portion 30 includes a pair of storage plates 31A and 31B that are substantially rectangular plate-like standing from the base plate 11, and the storage plates 31A and 31B at a certain interval in the plate thickness direction. And a connecting pin 32 to be connected. The storage plates 31A and 31B are fixed to the base plate 11 through the L-shaped bracket 32a and the fixing bolt 32b with one end (the lower end in FIG. 1) in the short direction in a state where the storage plates 31A and 31B are spaced apart from each other in the thickness direction. Yes.

  The storage plates 31A and 31B are formed with rail grooves 33 having a substantially J shape in side view. The rail groove 33 is provided symmetrically with respect to the intermediate position in the longitudinal direction of the storage plates 31A and 31B. The distance between the opposing storage plates 31A and 31B is shorter than the length in the longitudinal direction of the pin 25A of the meshing chain 20, and longer than the distance between the outer plates 24 of the meshing chain 20 in the same direction. Yes. As shown in FIG. 1, the chain members 21A and 21B are engaged with the rail grooves 33 of the storage plates 31A and 31B by engaging the pins 25A of the chain members 21A and 21B in the meshing chain 20 in the branched state. It is supported by 31A and 31B. Thus, the chain members 21A and 21B can slide with the rail grooves 33 of the storage plates 31A and 31B. At this time, in the direction in which the storage plates 31A and 31B face each other, the storage plates 31A and 31B and the meshing chain 20 have the above-described distance relationship, so that the chain members 21A and 21B drop off from the rail groove 33. It is suppressed. In other words, the meshing chain 20 in the branched state is restricted from moving in a direction other than the direction in which the rail groove 33 is formed by engaging with the rail groove 33.

  As shown in FIGS. 2 and 3, the columnar member 40 has a substantially rectangular column shape, and one end (the lower end in FIG. 3) in the longitudinal direction is fixed to the base plate 11. That is, the columnar member 40 stands upright from the base plate 11. The position where the columnar member 40 is fixed to the base plate 11 is a substantially central position in the longitudinal direction of the storage plates 31A and 31B, and a substantially central position between the opposing storage plates 31A and 31B. Further, the longitudinal direction of the columnar member 40 is the same as the advancing / retreating direction of the meshing chain 20 in a meshed state in which the paired chain members 21A and 21B are meshed and integrated into a straight bar shape. Moreover, the cross-sectional shape orthogonal to the longitudinal direction of the columnar member 40 is slightly smaller than the cross-sectional shape of the columnar space S formed inside the meshing chain 20 in the meshed state. In this way, the columnar member 40 moves to the inner side surface portion of the meshing chain 20 in the meshing state, specifically, the inner surface of the inner plate 23 and the bush 25 that constitute the meshing chain 20 as the meshing chain 20 moves in the forward and backward movement direction. It is possible to slide with the outer peripheral surface of the. The columnar member 40 preferably has a rigidity higher than at least the rigidity of the meshing chain 20 with respect to “twisting” and “bending”.

Next, the drive unit 50 that is driven to move the meshing chain 20 forward and backward will be described.
As shown in FIG. 1, the drive unit 50 rotates the rotation member 60 whose rotation axis direction is the forward / backward movement direction of the meshing chain 20, the support unit 70 that rotatably supports the rotation member 60, and the rotation member 60. And a drive motor 80.

  As shown in FIG. 5, the rotating member 60 has a substantially cylindrical shape in which a through-hole 61 that penetrates in the rotation axis direction with the rotation center as an axis is formed. A ring gear portion 62 that is continuous in the circumferential direction is formed on a part of the outer peripheral surface of the rotating member 60. On the other hand, a sliding groove 63 extending in a spiral shape along the rotation axis direction is formed on the inner peripheral surface of the rotation member 60. That is, in a broad sense, the sliding groove 63 is formed so as to gradually extend toward one side in the rotational axis direction of the rotating member 60 as it goes toward one side in the circumferential direction of the rotating member 60.

  The sliding groove 63 of the present embodiment has the same spiral first sliding groove 64 and second sliding groove 65. The first sliding groove 64 and the second sliding groove 65 do not cross each other on the inner peripheral surface of the rotating member 60 and gradually move toward one side in the rotational axis direction toward the one side in the circumferential direction of the rotating member 60. It is formed to extend toward. In the rotation axis direction of the rotating member 60, the interval L2 at which the first sliding groove 64 is formed is 2 of the interval L1 (see FIG. 4), which is the distance between the pins 25A adjacent in the forward / backward movement direction in the meshing chain 20. It has doubled. In the same rotation axis direction, the interval L2 at which the second sliding groove 65 is formed is equal to the interval L2 at which the first sliding groove 64 is formed, and is twice the interval L1. For this reason, in the same rotation axis direction, the interval between the first sliding groove 64 and the second sliding groove 65 is the interval L1, and the two pins 25A adjacent in the forward / backward moving direction in the meshing chain 20 are One slides with the first slide groove 64 and the other slides with the second slide groove 65.

  Further, the surface of the first sliding groove 64 on the lifting table 12 side (upper side in FIG. 5) is a sliding surface 64a, and the first sliding groove 64 is on the base plate 11 side (lower side in FIG. 5). This surface is defined as a sliding surface 64b. Further, a surface of the second sliding groove 65 on the lifting table 12 side is a sliding surface 65a, and a surface of the second sliding groove 65 on the base plate 11 side is a sliding surface 65b.

Next, the support part 70 is demonstrated.
As shown in FIGS. 1 to 3, the support portion 70 includes a first support portion 71 fixed to the base plate 11 and a second support portion 72 supported by the first support portion 71. . The first support portion 71 includes a support member 73 having a substantially rectangular plate shape in plan view, four leg members 74 that connect the support member 73 to the base plate 11, and an annular member 75 that can slide on the rotating member 60. have. As shown in FIG. 3, a support hole 73a is formed through the support member 73 in the thickness direction. Further, as shown in FIG. 2, the support member 73 is formed with an insertion hole 73b having an inner diameter smaller than that of the support hole 73a. The support hole 73a is formed in the approximate center of the support member 73, and the insertion hole 73b is formed in the support member 73 on the side of the support hole 73a.

  Moreover, as shown in FIG. 3, the annular member 75 has an enlarged diameter portion 75a having an inner diameter larger than that of other portions on the inner surface thereof. The four corners of the support member 73 in plan view are connected to the base plate 11 via leg members 74. Thus, as shown in FIG. 1, the support member 73 is arranged in parallel to the base plate 11 in a state of being separated from the base plate 11 by a distance corresponding to the length of the leg member 74 in the longitudinal direction. As shown in FIG. 3, the annular member 75 is fitted in the support hole 73 a of the support member 73 with the side on which the enlarged diameter portion 75 a is formed facing the second support portion 72 side.

  As shown in FIG. 1, the second support portion 72 includes a support member 76 that has a substantially rectangular plate shape in plan view, four leg members 77 that connect the support member 76 to the support member 73, and a rotating member 60. And a slidable annular member 78. As shown in FIG. 3, a support hole 76a is formed in the support member 76 in the thickness direction at a substantially center thereof. Similarly to the annular member 75, the annular member 78 has an enlarged diameter portion 78 a having a larger inner diameter than other portions on the inner surface thereof. The four corners of the support member 76 in plan view are connected to the support member 73 via leg members 77. Thus, as shown in FIG. 1, the support member 76 is arranged in parallel to the support member 73 in a state of being separated from the support member 73 by a distance corresponding to the length of the leg member 77 in the longitudinal direction. As shown in FIG. 3, the annular member 78 is fitted in the support hole 76 a of the support member 76 with the side where the enlarged diameter portion 78 a is formed facing the first support portion 71.

  As shown in FIG. 3, the rotating member 60 is rotatable at one end side (the lower end side in FIG. 3) in the rotation axis direction into the enlarged diameter portion 75 a of the annular member 75 of the first support portion 71. While being inserted, the other end side in the rotation axis direction is rotatably inserted into the enlarged diameter portion 78a of the annular member 78 of the second support portion 72, so that the support portion 70 is rotatably supported. That is, when the rotating member 60 rotates, the rotating member 60 slides on the inner surfaces of the enlarged diameter portions 75a and 78a of the annular members 75 and 78.

  As shown in FIGS. 1 and 2, the drive motor 80 is fixedly disposed on the base plate 11 between the base plate 11 and the first support portion 71 of the support portion 70. The rotation shaft 81 extending from the drive motor 80 is inserted through the insertion hole 73b (see FIG. 2) of the support member 73 of the first support portion 71 and supports the pinion 82 at the tip thereof. The pinion 82 meshes with the ring gear portion 62 of the rotating member 60, and the rotating member 60 can be rotated according to the rotation of the pinion 82. Thus, when the drive motor 80 rotates in the forward rotation direction and the reverse rotation direction, the rotating member 60 having the ring gear portion 62 that meshes with the pinion 82 of the drive motor 80 can rotate in the forward rotation direction and the reverse rotation direction. It becomes possible.

Next, the engagement relationship between the meshing chain 20 and the rotating member 60 will be described.
As shown in FIG. 6, the pin 25 </ b> A of the meshing chain 20 in a meshed state in which the paired chain members 21 </ b> A and 21 </ b> B are integrated in a straight bar shape is slidably engaged with the sliding groove 63 of the rotating member 60. Specifically, the pin 25A of one chain member 21A constituting the meshing chain 20 slides on the sliding surfaces 64a, 64b, 65a, 65b of the first sliding groove 64 and the second sliding groove 65. Will be. Similarly, the pin 25A of the other chain member 21B constituting the meshing chain 20 slides with the sliding surfaces 64a, 64b, 65a, 65b of the first sliding groove 64 and the second sliding groove 65. It becomes. In FIG. 6, since the meshing chain 20 is viewed from the front, the pin 25A of the chain member 21A seems to engage only with the sliding surfaces 64a and 65a. The pin 25A of the member 21A is engaged with the sliding surfaces 64b and 65b. The same applies to the pin 25A of the chain member 21B. Thus, the pin 25 </ b> A of the meshing chain 20 is slidable with respect to the sliding groove 63 of the rotating member 60 in a state where the meshing chain 20 is inserted into the through hole 61 of the rotating member 60. Therefore, the pin 25A functions as an example of a sliding portion that can slide with the sliding groove 63 of the rotating member 60 in this respect.

  As the rotating member 60 rotates, the pin 25A of the meshing chain 20 slides on the sliding grooves 64 and 65, whereby the meshing chain 20 can move forward and backward. In this embodiment, when the rotating member 60 rotates once (360 degrees), the meshing chain 20 in the meshing state moves a distance corresponding to the distance L2 in the forward / backward moving direction.

  As shown in FIG. 3, the end of the columnar member 40 opposite to the one end fixed to the base plate 11 in the longitudinal direction is located inside the rotating member 60. For this reason, the columnar member 40 does not protrude from the rotating member 60 when the meshing chain 20 is completely accommodated in the chain accommodating portion 30. In the present embodiment, the meshing chain drive device includes the meshing chain 20 and the rotating member 60.

Next, the operation of the lifting device 10 of this embodiment will be described.
Now, as shown in FIG. 6, when the moving object WO is to be moved up and down by the lifting device 10, the moving object WO is placed on the lifting table 12. Then, the drive motor 80 is driven in the forward rotation direction to rotate the rotating member 60 in the first direction indicated by the solid arrow in FIG.

  Then, as the rotating member 60 rotates in the first direction, the meshing chain 20 slides the pin 25 </ b> A with the sliding groove 63 of the rotating member 60. Specifically, the pin 25A of the chain member 21A constituting the meshing chain 20 and the sliding surfaces 64a and 64b of the first sliding groove 64 and the sliding surfaces 65a and 65b of the second sliding groove 65 are provided. Slide against each other. At the same time, the pin 25A of the chain member 21B constituting the meshing chain 20 and the sliding surfaces 64a and 64b of the first sliding groove 64 and the sliding surfaces 65a and 65b of the second sliding groove 65 slide relative to each other. To do.

  Then, when the pin 25A of the chain members 21A and 21B is pushed up by the sliding surfaces 64b and 65b, the meshing chain 20 moves in the traveling direction. Then, the chain members 21A and 21B move in the traveling direction along the rail groove 33 and are drawn into the rotating member 60, so that the meshing chain 20 in the branched state is integrated into a straight bar shape, and the traveling direction ( Move up). Thus, the elevating table 12 supported by the connecting portion 22 of the meshing chain 20 is raised, and the movable body WO can be raised.

  Further, when the meshing chain 20 slides with the rotating member 60, the inner side surface portion slides with the columnar member 40. For this reason, the columnar member 40 prevents the meshing chain 20 from being twisted even if a moment generated by sliding with the rotating member 60 acts in a direction orthogonal to the forward and backward movement direction of the meshing chain 20. Is done. For this reason, the meshing chain 20 is restrained from being displaced in a direction orthogonal to the advancing / retreating movement direction during the advancing / retreating movement, and stably moves forward / backward. Then, as shown in FIG. 7, when the lifting table 12 is raised to a necessary position, the rotation of the rotating member 60 is stopped and the state where the lifting table 12 is raised is maintained.

  Further, when the moving device WO is desired to be moved downward by the elevating device 10, the drive motor 80 is driven in the reverse direction to rotate the rotating member 60 in the second direction indicated by the solid line arrow in FIG. Then, as the rotating member 60 rotates in the second direction, the meshing chain 20 slides the pin 25 </ b> A with the sliding groove 63 of the rotating member 60. Specifically, the pin 25A of the meshing chain 20 and the sliding surfaces 64a and 64b of the first sliding groove 64 and the sliding surfaces 65a and 65b of the second sliding groove 65 are slid relative to each other. Then, the pin 25A of the chain members 21A and 21B is pushed down by the sliding surfaces 64a and 65a, so that the meshing chain 20 moves in the backward direction. Thus, the elevating table 12 supported by the connecting portion 22 of the meshing chain 20 is lowered, and the movable body WO can be lowered. Further, as the meshing chain 20 moves in the retracting direction, the meshing chain 20 in the meshing state is branched by the chain members 21A and 21B being disengaged from each other. The branched mesh chain 20, that is, the chain members 21 </ b> A and 21 </ b> B, is housed in the chain housing portion 30 as the pin 25 </ b> A slides on the rail groove 33.

  Similarly to when the meshing chain 20 moves in the traveling direction, when the meshing chain 20 moves in the retreating direction, the meshing chain 20 may be twisted by sliding with the columnar member 40. It is suppressed.

According to the above embodiment, the following effects can be obtained.
(1) The meshing chain 20 moves in the rotational axis direction of the rotating member 60, that is, in the traveling direction and the retreating direction by sliding the pin 25A along the sliding groove 63 in accordance with the rotation of the rotating member 60. It is possible. For this reason, when the meshing chain 20 is moved, the meshing chain 20 and the rotating member 60 do not repeatedly contact and separate from each other in a short time. Therefore, vibration generated when the meshing chain 20 is moved forward and backward. Can be suppressed.

  (2) When the meshing chain 20 in which the paired chain members 21A and 21B are meshed with each other is inserted into the through hole 61 of the rotating member 60, the pin 25A of the meshing chain 20 is a sliding groove of the rotating member 60. It can slide with respect to 63 as the rotating member 60 rotates. For this reason, since the meshing chain 20 can be disposed inside the rotating member 60, the lifting device 10 can be reduced in size in a direction orthogonal to the rotating shaft direction of the rotating member 60.

  (3) The meshing chain 20 can be moved in the advancing / retreating direction by sliding the pin 25A along the sliding groove 63 formed in a spiral shape. Here, the amount of movement of the meshing chain 20 per unit number of rotations of the rotating member 60 changes according to the distance L2 between the spiral sliding grooves 63 in the direction of the rotation axis of the rotating member 60. That is, by forming the sliding groove 63 in a spiral shape and changing the distance L2 in the rotation axis direction, the rotating member 60 can function as a transmission.

  (4) Since the meshing chain 20 in the meshing state moves forward and backward while sliding with the columnar member 40, the meshing chain 20 can be prevented from being “twisted” or “bended” during the forward / backward movement. Furthermore, since the columnar member 40 has an overlapping arrangement relationship with the rotating member 60 in the direction of the rotation axis of the rotating member 60, the columnar member 40 is caused by a moment acting on the meshing chain 20 compared to a case where the overlapping arrangement relationship does not exist. The deformation amount of the meshing chain 20 can be reduced. That is, since the columnar member 40 is located inside the portion where the moment of the meshing chain 20 acts, deformation such as torsion of the meshing chain 20 can be appropriately suppressed.

  (5) The columnar member 40 is in a state in which the end portion on the lifting table 12 side in the longitudinal direction is disposed inside the rotating member 60. For this reason, the columnar member 40 does not protrude from the rotating member 60 when the meshing chain 20 is accommodated in the chain accommodating portion 30, and the elevating device 10 can be downsized in the elevating direction of the elevating table 12.

  (6) Further, as compared with the case where the columnar member 40 is provided outside the meshing chain 20, it is not necessary to secure such a space on the side of the meshing chain. The apparatus 10 can also be reduced in size.

  (7) Since the meshing chain 20 slides with the columnar member 40 on the inner side and slides with the rotating member 60 on the outer side, the columnar member 40 and the rotating member 60 are perpendicular to the advancing / retreating movement direction of the meshing chain 20. It moves forward and backward while being sandwiched between and. For this reason, when the meshing chain 20 moves forward and backward, the meshing chain 20 is restrained from being tilted or buckled and displaced in directions other than the forward / backward direction. In this case, the rotating member 60 through which the meshing chain 20 is inserted also functions as a guide portion that guides the meshing chain 20 so as to move in the forward / backward movement direction.

In addition, you may change the said embodiment as shown below.
As shown in FIG. 8A, the protrusions of the pins 111A with respect to the outer plate 24 on one end side and the outer plate 24 on the other end side in the longitudinal direction of the pin 111A inserted through the bush 111 are made different from each other to engage with each other. The chain 110 may be configured. In this case, it is preferable that the side where the protruding amount from the outer plate 24 is large among the both sides in the longitudinal direction of the pin 111A is the sliding portion. Further, in this case, as shown in FIG. 8B, a rotating member 120 in which a single sliding groove 121 corresponding to the pin 111A of the meshing chain 110 may be formed. According to this, since it is not necessary to form a plurality of sliding grooves in the rotating member 120, the labor of processing the rotating member 120 can be reduced.

  As shown in FIG. 9A, a meshing chain 130 in which a sliding member 131 having a stepped columnar shape is detachably attached to the pin 25A as an example of a sliding portion may be used. Further, as shown in FIG. 9A, the sliding member 131 may be attached only to one end side in the longitudinal direction of the pin 25A in the chain members 132A and 132B. In this case, as shown in FIG. 9B, a rotating member 140 having a sliding groove 141 having an inner diameter corresponding to the shaft diameter of the tip shaft portion of the sliding member 131 may be used. According to this, since the sliding member 131 slides with the sliding groove 141 corresponding to the shaft diameter of the tip shaft portion of the sliding member 131, the meshing chain 130 can be moved even when the number of the sliding members 131 is small. It can be moved forward and backward stably.

  As shown in FIG. 10 (a), the engagement chain 150 may be detachably mounted on the pin 25A as an example of a sliding portion with a sliding member 151 having a substantially ball shape. In this case, as shown in FIG. 10B, a rotating member 160 in which a sliding groove 161 corresponding to the diameter of the sliding member 151 is formed may be used.

  The pin 25A (sliding part) may be a sliding part that can roll with respect to the sliding groove 63 (sliding surfaces 64a, 64b, 65a, 65b) of the rotating member 60. In this case, according to the rotation of the rotating member 60, the sliding portion rolls on the sliding groove 63 (sliding surfaces 64 a, 64 b, 65 a, 65 b) of the rotating member 60, so that the meshing chain 20 moves forward and backward. It will be. In this case, since the sliding portion smoothly slides (rolls) with respect to the sliding groove 63, it is possible to greatly suppress vibration and the like accompanying the sliding. “The sliding portion and the sliding groove slide” means that the sliding portion moves relative to the sliding surfaces 64a, 64b, 65a, 65b of the sliding grooves 64, 65 in a rolling manner. Shall also be included.

  The sliding portion may not be the end portion of the pin 25 </ b> A inserted through the bush 25. For example, a cylindrical portion that functions as a sliding portion may be provided separately from the outer plate 24. Moreover, the sliding part may be provided so as to extend in any direction as long as the direction intersects the longitudinal direction of the chain members 21A and 21B. For example, the sliding portion may extend in a direction that is the radial direction of the rotating member 60 when engaged with the sliding groove 63 of the rotating member 60.

  -Moreover, a sliding part may make plate shape. In this case, since the sliding area of the rotating member 60 and the sliding groove 63 is increased, the forward / backward movement of the meshing chain 20 can be easily stabilized.

The sliding groove 63 may have more sliding grooves in addition to the first sliding groove 64 and the second sliding groove 65.
In the direction of the rotation axis of the rotating member 60, the interval L2 between the sliding grooves 63 may be arbitrarily changed. When it is desired to increase the amount of forward / backward movement of the meshing chain 20 per unit rotational speed of the rotating member 60, the above-described interval L2 may be widened, and the amount of forward / backward movement of the meshing chain 20 per unit rotational speed of the rotating member 60. When it is desired to reduce the distance, the above-described interval L2 may be narrowed.

  The sliding groove 63 may not be formed in a spiral shape as long as it gradually extends toward one side in the rotation axis direction as it goes toward one side in the circumferential direction of the rotating member 60. That is, the sliding groove 63 may be, for example, the sliding groove 63 that connects the both end surfaces in the rotation axis direction of the rotating member 60 by a quarter rotation in the circumferential direction of the rotating member 60. In this case, the meshing chain 20 moves forward and backward by a distance corresponding to the length dimension of the rotating member 60 in the rotation axis direction by rotating the rotating member 60 by a quarter.

  The meshing chain 20 may not be inserted through the through hole 61 of the rotating member 60. For example, a sliding groove may be formed on the outer peripheral surface of the rotating member 60 so that the sliding groove and the pin 25A of the meshing chain 20 can slide. In this case, the rotating member 60 can also drive the rotating member 60 by directly connecting one end of the rotating shaft direction to the drive motor.

  The rotation member 60 may be provided inside the meshing chain 20. In this case, the rotating member has a sliding groove formed on the outer peripheral surface thereof, and the sliding portion slidable with the sliding groove on the outer peripheral surface of the rotating member faces the inner side of the engaging chain 20. It is desirable to be formed.

  In the first support portion 71 and the second support portion 72, the annular members 75 and 78 may be replaced with bearings such as bearings that allow a rotational difference inside and outside in the radial direction. According to this, it is possible to reduce the frictional resistance with the support portion 70 that is generated as the rotating member 60 rotates.

  The transmission of the rotational drive from the drive motor 80 to the rotating member 60 may be performed by a sprocket and a chain, may be performed by a pulley and a belt, or may be performed by another transmission mechanism.

The columnar member 40 may have a circular cross-sectional shape in the longitudinal direction, or may be a polygon excluding a rectangle.
-The engagement part which makes concave shape in the outer peripheral surface of the rotation member 60, and the engagement part which makes the convex shape which can be engaged with the said engagement part may be further provided. According to this, the raised and lowered table 12 is held at a certain position in a state where electric power is not supplied to the drive motor 80 by restricting the rotation of the rotating member 60 by engaging the engaged portion and the engaging portion in an uneven manner. Can be stopped.

  -The raising / lowering apparatus 10 is good also as a base plate 11 being installed in a ceiling surface, and being able to advance / retreat to a perpendicular direction. Further, the base plate 11 may be installed on the horizontal wall so that the base plate 11 can advance and retreat in a direction perpendicular to the vertical direction. The base plate 11 may be installed on a surface inclined at an arbitrary angle with respect to the vertical direction.

  -The raising / lowering table 12 does not need to be provided. In this case, the configuration may be such that the end portion on the traveling direction side of the meshing chain 20 is branched and stored in the chain storage portion in the same manner as the end portion on the retreating direction side. In short, any configuration is acceptable as long as the meshing chain 20 in the meshing state is slid along with the rotation of the rotating member 60 to move forward and backward.

  DESCRIPTION OF SYMBOLS 10 ... Elevating device (an example of a movable body moving device), 12 ... Elevating table (an example of a movable body), 20, 110, 130, 150 ... Engagement chain, 21A, 21B, 132A, 132B ... Chain member, 25A ... Pin ( An example of a sliding part), 40 ... columnar member, 60, 120, 140, 160 ... rotating member, 61 ... through hole, 63, 121, 141, 161 ... sliding groove, 64 ... first sliding groove, 65 ... 2nd sliding groove, 131, 151 ... sliding member (an example of a sliding part).

Claims (6)

It has at least a pair of chain members that can move forward and backward, and the chain members that make a pair move together in the direction of travel to engage and integrate with each other. A meshing chain that diverges and branches by moving to
The chain members of the meshing chain are meshed with each other and rotated in the meshing state in which the chain members are integrated into a straight rod shape, and the rotation axis direction is rotated as the rotation axis direction, and gradually toward the one side in the circumferential direction, the rotation axis direction A rotating member formed with a sliding groove extending toward one side of
The meshing chain has a sliding portion slidable with a sliding groove of the rotating member,
The rotating member slides the sliding portion along the sliding groove in accordance with the rotation of the rotating member, thereby allowing the meshing chain to move in the direction of the rotation axis and rotates in the first direction. Sometimes, the chain members are moved in the advancing direction while meshing the chain members with each other, and when rotating in a second direction opposite to the first direction, the chain members are meshed with each other. A meshing chain driving device characterized in that the meshing chain is moved in the retraction direction while being disengaged.   The rotating member is formed with a through-hole penetrating in the direction of the rotation axis, and the sliding groove is formed on an inner peripheral surface of the through-hole, and the meshing chain in which the chain members are meshed with each other The meshing chain drive device according to claim 1, wherein the sliding portion is slidable with the sliding groove in a state of being inserted into the through hole.   The meshing chain drive device according to claim 1 or 2, wherein the sliding groove is formed in a spiral shape in the direction of the rotation axis.   The said chain member is further equipped with the columnar member which can be slid with the meshing chain inside the said meshing chain in meshing state, The Claim 1 characterized by the above-mentioned. Engagement chain drive.   The meshing chain drive device according to any one of claims 1 to 4, wherein the sliding portion is detachable from the meshing chain. The meshing chain drive device according to any one of claims 1 to 5,
A movable body arranged to be movable in the advancing / retreating direction of the meshing chain in which the paired chain members are meshed with each other and moving as the meshing chain moves forward / backward. Mobile equipment.