JP2020075811A - Endless chain driving mechanism and mechanical parking facility equipped therewith - Google Patents

Abstract

To provide an endless chain driving mechanism that is capable of rotating an endless chain under tension in a stable manner even when shaking is caused on the endless chain and that is easy to maintain.SOLUTION: The endless driving chain mechanism includes: a driving-side chain guiding member that drives an endless chain in the driving-side chain guiding part; and at least two driven-side chain guiding members that are separately provided on the front and the rear of the rotational direction of the endless chain in the driven-side chain guiding member. The supporting shaft that supports the first driven-side chain guiding member is supported on the anchoring side, and the moving shaft that supports the second driven-side chain guiding member is supported movably in the direction that imparts tension to the endless chain. The endless chain driving mechanism has a tension adjustment mechanism that adjusts the tension on the endless chain by biasing so as to keep the tension between the driven-side chain guiding member supported by the movable shaft and the driving-side chain guiding member, the driven-side chain guiding member supported by the supporting shaft being designed so as to be movable in the axial direction of the supporting shaft.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a drive mechanism using an endless chain and a mechanical parking facility including the drive mechanism.

  Conventionally, a drive mechanism using an endless chain has been used as a mechanism for elevating and lowering mechanical parts and the like. Some such endless chain drive mechanisms use a tensioner or the like to constantly apply tension in order to remove the slack of the endless chain. As this tensioner, there is known a tensioner that presses a free sprocket or the like between sprockets of an endless chain to maintain tension.

  For example, there is a mechanical parking facility as a device using an endless chain drive mechanism. Hereinafter, a mechanical parking facility will be described as an example. Some mechanical parking facilities use an endless chain drive mechanism to raise and lower a pallet that is a mechanical component (also referred to as "load" in this specification and the claims). As a mechanical parking facility for raising and lowering a pallet by an endless chain drive mechanism, for example, there is a multistage mechanical parking facility.

  In the endless chain drive mechanism for multi-stage mechanical parking equipment, the one that gives the initial tension by adjusting the distance between the shafts of the sprockets that drive the endless chain, or the shaft of one sprocket with the spring of the other sprocket There is a type that gives tension to the chain by urging it away from the chain.

  As a prior art of this kind, there is one in which a tensioner having a roller for pressing an endless chain that is hung between a driving sprocket and a driven sprocket is provided to maintain the tension of the endless chain (for example, Patent Document 1). 1).

  Further, as another prior art, there is one in which an adjusting mechanism for maintaining the tension of the chain is provided on the driven side of the separated turning portions of the endless chain (for example, refer to Patent Document 2).

JP 2001-59567 A JP, 2017-57978, A

  However, in Patent Document 1 described above, a space for providing a tensioner is required between the sprockets, and maintenance takes time depending on the length of the endless chain.

  Further, in Patent Document 2 described above, under the condition that the endless chain is shaken by wind or the like, it is necessary to take measures to prevent displacement of the engaging portion between the endless chain and the mechanical component.

  Therefore, the present invention provides an endless chain drive mechanism that can be stably rotated under tension even when the endless chain is shaken, and is easy to maintain, and a mechanical parking facility including the endless chain drive mechanism. The purpose is to do.

  In order to achieve the above object, an endless chain drive mechanism according to the present invention includes an endless chain having an engaging member that raises and lowers a load, and a drive side chain guide portion and a driven side chain guide portion that are arranged in separated swivel portions. An endless chain drive mechanism that is driven to rotate by means of a drive-side chain guide member that drives the endless chain in the drive-side chain guide portion, and a front-rear direction in the turning direction of the endless chain in the driven-side chain guide portion. At least two driven side chain guide members arranged, a support shaft for supporting the first driven side chain guide member is supported on the fixed side, and a movement for supporting the second driven side chain guide member. A shaft is supported so as to be movable in a direction in which tension is applied to the endless chain, and is biased to maintain tension between the driven side chain guide member and the drive side chain guide portion supported by the moving shaft. Then, the driven chain guide member supported by the support shaft has a tension adjusting mechanism for adjusting the tension of the endless chain, and is configured to be movable in the axial direction of the support shaft. The "driven side chain guide member" in the specification and the claims includes "sprocket" and "roller".

  With this configuration, in the endless chain drive mechanism that swings and drives the endless chain between the drive-side chain guide portion and the driven-side chain guide portion that are arranged in the separated swing portion, the endless chain drive mechanism is supported by the support shaft of the driven-side chain guide portion. Since the driven chain guide member can move in the axial direction of the support shaft, even if the endless chain is shaken by an external force or the like and the engagement part is displaced, the displacement of the driven chain guide member in the axial direction Can be absorbed by moving to. The movement of the driven side chain guide member in the axial direction can be automatically returned to the correct position by rotating the endless chain that is applied between the driven side chain guide member and the drive side chain guide portion when the load is removed. Therefore, it is possible to stably rotate the endless chain in a state where appropriate tension is applied, and it is possible to easily perform maintenance.

  Further, the driven side chain guide member supported by the moving shaft cannot move in the axial direction of the moving shaft, or moves less than the movable amount of the driven side chain guide member supported by the supporting shaft. It may be limited in amount.

  According to this structure, it is possible to limit the axial movement of the driven side chain guide member supported by the moving shaft and appropriately maintain the position of the driven side chain guide member supported by the moving shaft.

  Further, the endless chain is further provided with a guide member for limiting the swing of the endless chain to guide the endless chain between the separated revolving parts, and the distance by which the driven chain guide member moves in the axial direction of the support shaft is: It may be set to be equal to the gap between the engaging member and the guide member of the endless chain.

  According to this structure, the guide member limits the distance that the endless chain swings between the turning portions, and the driven-side chain guide member can move in the axial direction of the support shaft within a range equivalent to the distance. Therefore, the shift of the engaging member in the swinging distance of the endless chain is absorbed by the driven side chain guide member moving in the axial direction.

  Further, a swing member that supports the driven chain guide member is provided, and the swing member has a first driven chain guide member supported by the support shaft at one end and a second driven chain guide member at the other end. The driven-side chain guide member is supported by the swinging member on the moving shaft, and the moving shaft side is swingable around the supporting shaft. The tension adjusting mechanism includes the swinging member, An urging member that urges the moving shaft side around the support shaft in a direction away from the drive side chain guide member, and an adjusting mechanism that adjusts the urging force of the urging member may be provided.

  According to this structure, the driven-side chain guide member side supported by the moving shaft of the driven-side chain guide portion is urged by the urging member in the direction away from the drive-side chain guide portion, and the endless chain has a compact structure. The tension of can be maintained appropriately. Even if the endless chain extends, the urging force of the urging member can be adjusted by the adjusting mechanism.

  Further, in the endless chain, a chain guide member side of the driven side chain guide portion supported by the support shaft may be configured as a working side for elevating and lowering a load. The "working side" in this specification and the documents in the claims means the side that raises and lowers the load of the endless chain.

  According to this structure, the working side of the endless chain has no change in the distance between the separated swiveling parts, so that the load can be stably moved up and down, and the endless chain has a tension adjusting mechanism on the side opposite to the working side. Can maintain tension.

  On the other hand, a mechanical parking facility according to the present invention is a mechanical parking facility equipped with any one of the above endless chain drive mechanisms, wherein the drive side chain guide part is provided on an upper part of a frame member, and In addition, the driven side chain guide portion is provided, and the tension adjusting mechanism is provided near the driven side chain guide portion.

  With this configuration, a mechanism for keeping the endless chain at an appropriate tension is provided in the lower driven-side chain guide portion, and the configuration for applying an appropriate tension to the endless chain can be made compact and easy to maintain.

  According to the present invention, even when the endless chain is shaken, the endless chain can be swung with an appropriate tension applied, and maintenance can be easily performed in the driven chain guide portion.

FIG. 1 is a front view showing an example of a mechanical parking facility including an endless chain drive mechanism according to the present invention. FIG. 2 is a perspective view showing the configuration of one row of the endless chain drive mechanism according to the present invention. FIG. 3 is a side view showing one of the endless chain drive mechanisms shown in FIG. FIG. 4 is a perspective view showing an example of a pallet which is moved up and down by the endless chain drive mechanism shown in FIG. FIG. 5 is an enlarged side view of the driven side chain guide portion in the endless chain drive mechanism according to the first embodiment shown in FIG. FIG. 6 is an enlarged front view showing a driven side chain guide portion in the endless chain drive mechanism shown in FIG. FIG. 7 is a sectional view taken along line VII-VII shown in FIG. FIG. 8 is an enlarged view in which a part of the portion VIII shown in FIG. 7 is shown in cross section. FIG. 9 is a front view showing the relationship between the endless chain and the guide member. FIG. 10 is a cross-sectional view of the cross section shown in FIG. 7 when an external force acts on the endless chain. FIG. 11 is an enlarged side view of the driven chain guide portion of the endless chain drive mechanism according to the second embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the endless chain drive mechanism 50 provided in the mechanical parking facility 1 having the storage spaces 40 in four stages and five rows will be described as an example. Further, in this embodiment, an example in which the four corners of the pallet 30 are moved up and down by the two rows of endless chains 51 will be described. The concept of front-rear and left-right directions in this specification and the claims is the same as the concept that the turning direction of the endless chain 51 is the front-rear direction as shown in FIG.

(Example of mechanical parking equipment configuration)
FIG. 1 is a front view showing an example of a mechanical parking facility 1 including an endless chain drive mechanism 50. FIG. 2 is a perspective view showing the configuration of the endless chain drive mechanism 50 in one row. FIG. 3 is a side view showing one of the endless chain drive mechanisms 50 shown in FIG. FIG. 4 is a perspective view showing an example of the pallet 30 which is moved up and down by the endless chain drive mechanism 50.

  As shown in FIG. 1, the mechanical parking facility 1 of this embodiment is a ground entry type provided on the ground G, and includes the lowermost first tier 10 to the second tier 11, the third tier 12, and the highest tier 10. 4th row 13 in the upper row, 4 rows × 5 rows of storage space 40 from the first row 20 in the leftmost row to the second row 21, the third row 22, the fourth row 23, and the fifth row 24 in the rightmost row Is equipped with. The number of pallets 30 for storing the automobiles V is 19, which is one less than the storage space 40 at 20 locations. In the illustrated example, the storage space 40 of the uppermost fourth row 13 of the fifth row 24, which is the rightmost row, is one empty space 41.

  This mechanical parking facility 1 includes a pillar member 2 vertically provided at a front and rear position, a front and rear beam member 3 connecting the pillar member 2 in the front and rear direction, and a left and right beam member (not shown) connecting the left and right directions. It is provided with a frame-shaped frame member 4 provided with. In the mechanical parking facility 1 of this embodiment, the fifth row 24, which is the rightmost row of the first floor 10 on the ground floor, is the loading / unloading section 42. A front movable fence 43 is provided in the loading / unloading section 42.

  In the mechanical parking facility 1 of this embodiment, each pallet 30 can be traversed individually as indicated by an arrow W in the first stage 10 which is the lowermost stage and the fourth stage 13 which is the uppermost stage. Further, in each of the first to the fifth rows 24 to 24, all the pallets 30 in the same row are simultaneously (simultaneously) between the lowest first row 10 and the uppermost fourth row 13. It is possible to move up and down as shown by arrow H. An endless chain drive mechanism 50 (FIG. 2) that raises and lowers the pallet 30 is provided at the position of the column member 2 of the frame member 4. The mechanical parking facility 1 is drive-controlled by the control device 5.

  As shown in FIG. 2, the one-row endless chain drive mechanism 50 is provided with endless chains 51 at the front, rear, left, and right positions of each row 20 to 24 (FIG. 1), and the upper and lower spaces are provided. The driving chain guide 53, which is a turning part, and the driven chain guide 56, which is a lower turning part, are driven to rotate. The upper drive side chain guide portion 53 is provided with two drive sprocket 54 and idle roller 55 which are drive side chain guide members. The drive sprocket 54 and the idle roller 55 are arranged apart from each other in the front-rear direction in the turning direction of the endless chain 51, and the drive sprocket 54 is provided so as to be located above. Further, two driven rollers 57 (second) and a driven roller 58 (first), which are first and second driven chain guide members, are arranged in the lower driven chain guide portion 56. The driven rollers 57 and 58 are arranged apart from each other in the front-rear direction of the turning direction of the endless chain 51. The endless chain 51 is driven by the drive machine 6 that rotationally drives the drive sprocket 54. The endless chain 51 is provided with engagement hooks 52 as engagement members at predetermined intervals. The engaging hooks 52 are provided at intervals suitable for the intervals of the first to fourth steps 13 described above.

  As shown in FIG. 3, the drive sprocket 54 and the idle roller 55 arranged in the upper drive side chain guide 53, the driven roller 57 and the driven roller 58 arranged in the lower driven chain guide 56, The endless chain 51 is hung. In this example, the right side of the illustrated endless chain 51 is the working side F, and the engagement hook 52 provided on the endless chain 51 faces upward. On the left non-working side R shown in the figure, the engagement hook 52 faces downward.

  On the other hand, as shown in FIG. 4, the pallet 30, which is a mechanical component that acts as a load, is provided with locking members 31 at four corners of the front, rear, left, and right ends of the lower surface. Then, the engaging hooks 52 provided on the endless chain 51 are hooked on the locking members 31 provided at the four corners of the pallet 30, and the endless chain 51 is swung to raise and lower the pallet 30.

  The endless chains 51 that engage the engaging hooks 52 with the locking members 31 provided at the four corners of the pallet 30 are synchronously driven so as to raise and lower the pallet 30 in a horizontal state. The endless chain 51 may be synchronously driven by mechanically connecting the drive sprockets 54 with a drive shaft as shown in FIG. 2 or by synchronizing the drive machine 6 electrically.

(Structure of the endless chain drive mechanism according to the first embodiment)
FIG. 5 is an enlarged side view of the driven chain guide portion 56 of the endless chain drive mechanism 50 according to the first embodiment shown in FIG. FIG. 6 is an enlarged front view showing the driven chain guide portion 56 of the endless chain drive mechanism 50 shown in FIG. FIG. 7 is a sectional view taken along line VII-VII shown in FIG. FIG. 8 is an enlarged view in which a part of the portion VIII shown in FIG. 7 is shown in cross section. FIG. 9 is a front view showing the relationship between the endless chain 51 and the guide member.

  As shown in FIGS. 5 and 6, the moving shaft 59 of the driven roller 57 and the support shaft 60 of the driven roller 58, which are provided in the driven chain guide portion 56, are provided at both ends of the swing member 63. The swing member 63 is formed by bending both ends of the plate material downward, and the moving shaft 59 and the support shaft 60 are supported by the bent portions. The swing member 63 is a member having high strength by bending the end portion of the plate material.

  The support shaft 60 supported by one end of the swing member 63 is supported by the frame member 4, and the moving shaft 59 supported by the other end of the swing member 63 swings around the support shaft 60. It is swingable integrally with the member 63. The moving shaft 59 and the support shaft 60 are rotatable. As described above, the support shaft 60 does not move at a fixed position of the frame member 4, and the moving shaft 59 swings integrally with the swing member 63 about the support shaft 60. In this embodiment, the swing member 63 is configured to swing around the support shaft 60 of the driven roller 58, but the swing center may be provided at a position different from the support shaft 60. Further, instead of swinging (moving) the moving shaft 59 with the swing of the swinging member 63, the moving shaft 59 may be linearly moved in the vertical direction. In this case, both ends of the moving shaft 59 may be linearly moved along a guide means such as a guide plate.

  Then, in the vicinity of the driven side chain guide portion 56, the driven roller 57 in the lower driven side chain guide portion 56 is urged downward with respect to the upper drive side chain guide portion 53 (FIG. 3) of the endless chain 51. A tension adjusting mechanism 70 that applies a predetermined tension to the endless chain 51 is provided. In this embodiment, a spring member 71, which is a biasing member for biasing the swinging member 63 downward with respect to the frame member 4, is provided so as to bias downward the position of the swinging member 63 close to the moving shaft 59. Has been. Specifically, the frame member 4 is provided with a support member 83 above the position of the driven side chain guide portion 56, and a support plate 86 is provided at a predetermined position of the support member 83. The shaft member 72 is inserted through the through hole 84 provided in the support plate 86 and the through hole 85 provided in the horizontal plate 87 of the frame member 4. The connecting member 73 provided at the lower end of the shaft member 72 extends downward from the through hole 85 of the frame member 4, is inserted into the through hole 66 (FIG. 7) provided in the swing member 63, and the connecting pin 74 is provided. Is connected to a predetermined position of the swing member 63. The spring member 71 (a compression spring in this embodiment) is inserted through the upper portion of the shaft member 72. The spring member 71 is a valve seat whose upper end is in contact with the support plate 86 of the support member 83, and whose lower end is positioned by the lock nut 75 screwed into the screw portion provided on the shaft member 72. It is held by 78. By adjusting the position of the lock nut 75 upward, the compression amount of the spring member 71 is increased, and the shaft member 72 can apply a large biasing force to the swing member 63. By adjusting the position of the lock nut 75 downward, the compression amount of the spring member 71 is reduced, and a small biasing force can be applied to the swing member 63 by the shaft member 72. The tension adjusting mechanism 70 includes an adjusting mechanism that adjusts the biasing force by adjusting the position of the lock nut 75. The tension of the endless chain 51 is adjusted by the tension adjusting mechanism 70 by urging the driven roller 57 away from the drive side chain guide portion 53 (driving sprocket 54) or by urging the driven roller 57 outward. including.

  Further, a regulating plate 76 is provided below the position of the lock nut 75 provided on the shaft member 72 by a predetermined amount to determine the position where the shaft member 72 moves to the lowest position. The restricting plate 76 shown in the drawing is in contact with the horizontal plate 87 of the frame member 4, and this position is the position where the swinging member 63 swings to the lowermost position.

  This figure shows a state in which the endless chain 51 reaches maximum wear elongation. In this state, the detection device 80 detects the extension of the endless chain 51. In this example, the detection dog 81 fixed by the fixing nut 77 at an appropriate position of the shaft member 72 is detected by operating the limit switch 82 of the detection device 80.

  According to the tension adjusting mechanism 70, the endless chain 51 is biased downward by the driven roller 57 on the swing side, and the spring member 71 applies a proper tension. That is, by biasing the swinging member 63 with the spring member 71, the moving shaft 59 of the driven roller 57 is guided via the swinging member 63 around the fixed support shaft 60 as the drive side chain guide of the endless chain 51. The driven chain guide portion 56 (lower portion) is urged downward with respect to the portion 53 (upper portion). As a result, the endless chain 51 can be brought into a state where appropriate tension is applied. According to this embodiment, since the motion of applying tension to the endless chain 51 is the circular motion of the swinging member 63 with the support shaft 60 as the center, the endless chain can be made less likely to occur with a simple configuration. The tension corresponding to the operation of 51 can be stably applied.

  Moreover, since the swing member 63 is swung on the non-working side R of the endless chain 51 to maintain the tension, the driven side chain guide portion 56 and the drive side chain guide portion are separated on the working side F of the endless chain 51. There is no change in the distance to 53, and the tension of the endless chain 51 can be maintained without affecting the elevation of the pallet 30.

  Further, in this embodiment, since the tension adjusting mechanism 70 is provided in the vicinity of the driven rollers 57 and 58, it is possible to refuel the swinging member 63 and the like at the same time when the driven rollers 57 and 58 are maintained (when refueling). Also, the labor required for maintenance can be reduced.

  As shown in FIG. 7, the swing member 63 has one end side supported by the frame member 4 by the support shaft 60. The swing member 63 whose one end side is supported by the support shaft 60 is supported at a fixed position by a collar 65 provided between the swing member 63 and the frame member 4. A moving shaft 59 is supported on the other end of the swinging member 63, and is supported at a fixed position of the swinging member 63 by a collar 64 provided between the moving shaft 59 and the swinging member 63. Here, the support at a fixed position includes a support in a state in which it cannot be moved in the axial direction, or a state in which there is a gap in which it can be moved to absorb a dimensional error of a component, for example. The gap in this case is a movement amount considerably smaller than the movable amount given to the driven roller 58. An endless chain 51 is hung on a driven roller 58 provided on the support shaft 60 and a driven roller 57 provided on the moving shaft 59.

  Then, as shown in FIG. 8, the driven roller 58 supported by the support shaft 60 is supported by the support shaft 60 via a bearing member 61. As the bearing member 61, for example, an oil-free bearing, an oil-free bush, or the like can be used. In this example, two driven rollers 58 around which two rows of endless chains 51 are hooked are provided. The two driven rollers 58 are hung on the endless chain 51, and are supported by the support shaft 60 in a free state. The driven roller 58 is movable in the direction of the axis L (axial direction) along the outer surface of the support shaft 60 within the range of the distance D.

  The driven roller 57 supported by the moving shaft 59 is supported by the moving shaft 59 via a bearing member 62. The driven roller 57 is configured to rotate at a fixed position of the moving shaft 59 by a collar 64 provided between the driven roller 57 and the swing member 63.

  Further, as shown in FIG. 9, the frame member 4 is provided with an elevating guide 90 which is a guide member for limiting the swing of the endless chain 51 even when the endless chain 51 swings in the horizontal direction when the frame member 4 moves up and down (only in FIG. 8). (Shown). In the elevating guide 90, the gap S is narrow at the portion where the engaging hook 52 of the endless chain 51 is hooked on the locking member 31 of the pallet 30. In the example shown in FIG. 1, the gap S is narrowed between the first step 10 and the fourth step 13 for engaging / disengaging the engaging hook 52 and the locking member 31. In this example, a guide shoe 67 is provided on the side surface of the engaging hook 52 on the lifting guide side, and the swing of the endless chain 51 is limited by the gap S between the guide shoe 67 and the lifting guide 90. A resin member or the like can be used for the guide shoe 67.

  The gap S and the distance D by which the driven roller 58, which is the driven-side chain guide member, can move in the axial direction of the support shaft 60 are set to be equal. In the case of the mechanical parking equipment 1, since the left and right positions of the pallet 30 are moved up and down by the endless chain 51, the total (S × 2) of the gaps S at the left and right positions and the distance D are set to be equal (preferably equal to or more). Has been done. “Equivalent” in this specification and the documents of the claims only need to be approximately the same distance, and also includes installation error and the like. By making the gap S and the distance D equal to each other, even if the engaging hook 52 shifts in the horizontal direction, the shift amount can be absorbed by the driven roller 58 moving in the direction of the axis L.

(Operation of endless chain drive mechanism)
FIG. 10 is a cross-sectional view of the cross section shown in FIG. 7 when an external force acts on the endless chain 51. According to the endless chain drive mechanism 50, when the engagement hook 52 is engaged with the locking member 31 of the pallet 30 on the working side F, even if a position shift occurs in the horizontal direction due to an external force or the like, the endless chain 51 shifts. The driven roller 58 can be displaced in the direction of the axis L in the opposite direction. For example, even when the endless chain 51 rolls due to wind or the like, the engagement hook 52 can be engaged with the locking member 31 of the pallet 30. In this case, the endless chain 51 may be twisted or the like at a portion of the engaging hook 52 and may be slightly inclined, but the driven roller 58 is engaged with the driven roller 58 by being displaced in the direction of the axis L of the support shaft 60. You can keep the state. At this time, for example, on the driven roller 57 side, even if the endless chain 51 is slightly floated from the driven roller 57 (a in the figure), the engaged state of the driven roller 57 and the endless chain 51 can be maintained. In this state, the endless chain 51 is floated or twisted between the driven roller 57 and the driven roller 58.

  After that, when the pallet 30 is moved from the engagement hook 52 to the frame member 4 side and the load is removed, the endless chain 51 will rotate along the upper drive sprocket 54, the idle roller 55, and the lower driven roller 57. And As a result, the driven roller 58 moved in the direction of the axis L of the support shaft 60 is returned to the regular position by the endless chain 51. The so-called self-centering function returns the original position.

  In this way, the endless chain 51 turns in the normal position in the free state where the engaging hooks 52 are not engaged with the locking members 31 of the pallet 30 which is the load, and therefore, the locking members 31 of the pallet 30 are next. When engaging the engaging hook 52 with, the engaging hook 52 can be engaged at a regular position.

(Structure of the endless chain drive mechanism according to the second embodiment)
FIG. 11 is an enlarged side view of the driven chain guide portion 56 of the endless chain drive mechanism 100 according to the second embodiment. The same components as those of the endless chain drive mechanism 50 shown in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted.

  In the endless chain drive mechanism 100 according to the second embodiment, the driven roller 58, which is the first driven-side chain guide member provided in the lower driven-side chain guide portion 56, is supported by the frame member 4 by the support shaft 60. The driven roller 57, which is the second driven-side chain guide member, is supported by the connecting member 73 of the tension adjusting mechanism 110 by the moving shaft 59. The connecting member 73 of this embodiment is formed so that its lower portion straddles the driven roller 57. The shaft member 72 of this embodiment is guided in the through hole 85 of the horizontal plate 87. The shaft member 72 is guided so as to move up and down without rotating.

  In this embodiment, the tension adjusting mechanism 110 having such a structure applies a biasing force to the driven roller 57, which is the second driven chain guide member, via the shaft member 72 by the spring member 71. Other configurations of the tension adjusting mechanism 110, adjustment of the urging force, and the like are the same as those of the tension adjusting mechanism 70 in FIG.

  Also in the endless chain drive mechanism 100 of this embodiment, the driven roller 58, which is the first driven-side chain guide member, is movable in the direction of the axis L of the support shaft 60. Therefore, even if the engaging hook 52 is displaced in the horizontal direction due to an external force when the engaging hook 52 is engaged with the locking member 31 of the pallet 30, the driven roller 58 of the axis L is displaced in the direction in which the endless chain 51 is displaced. You can shift in the direction. Therefore, a stable engagement state can be maintained. Then, when the load is removed from the engagement hook 52, the driven roller 58 is returned to the regular position. Other functions and effects are the same as those of the endless chain drive mechanism 50 shown in FIG.

(Summary)
According to the above endless chain drive mechanism 50, in the driven side chain guide portion 56 of the endless chain 51, it is possible to stably rotate the endless chain 51 in a state where appropriate tension is applied to the endless chain 51. Moreover, even if the endless chain 51 on the working side F is misaligned, the driven roller 58 supported by the support shaft 60 can move in the direction of the axis L to absorb the misalignment, thus supporting the pallet 30 (load). It is possible to make a stable turn in the state. Further, when the engagement is released and the load is removed, the driven roller 58 that has moved in the direction of the axis L is returned to the normal position, so that the next engagement can be appropriately performed.

  Therefore, in the configuration in which the locking member 31 of the pallet 30 is hung up and down by the engagement hook 52 provided on the endless chain 51 as in the mechanical parking facility 1 described above, the endless chain 51 is appropriately tensioned. Thus, the pallet 30 (load) can be stably moved up and down.

(Other modifications)
The endless chain 51 of the endless chain drive mechanism 50 may be one row or three rows or more, and is not limited to the above-described embodiment. As the driven side chain guide member, a known sprocket may be used instead of the driven rollers 57 and 58, or a chain guide member corresponding to the number of rows of the chain may be integrated. Further, the mechanical parking facility 1 can be applied as long as it has two or more stages, and is not limited to the configuration in the above-described embodiment.

  Furthermore, the above-described embodiment shows an example, and the endless chain drive mechanism 50 can be used not only in the mechanical parking facility 1 but also in an industrial robot, a warehouse, etc., and the endless chain drive mechanism 50 of the mechanical parking facility 1 can be used. It is not limited to.

  Further, in the above-described embodiment, an example in which the drive sprocket 54 is arranged above has been described, but a configuration in which the drive sprocket 54 is arranged below may be adopted, and various configurations may be modified within a range not impairing the gist of the present invention. However, the present invention is not limited to the above embodiment.

1 Mechanical parking equipment
4 frame members
5 control device
6 Drive 30 pallets (load)
31 locking member 50 endless chain drive mechanism 51 endless chain 52 engaging hook (engaging member)
53 Drive side chain guide part (swivel part)
54 Drive sprocket (drive side chain guide member)
55 Idle roller (drive side chain guide member)
56 Driven side chain guide (swing part)
57 Driven roller (driven chain guide member: swing side)
58 Driven roller (driven side chain guide member: fixed side)
59 Moving shaft 60 Support shaft 61, 62 Bearing member 63 Swing member 70 Tension adjusting mechanism 71 Spring member (biasing member)
72 Shaft member 75 Lock nut 78 Valve seat 80 Detection device 81 Detection dog 82 Limit switch 90 Elevating guide (guide member)
L axis
S gap
D distance
F Working side
R Non-working side
V car

Claims (6)

An endless chain drive mechanism for swing-driving an endless chain having an engaging member for raising and lowering a load, by a drive-side chain guide portion and a driven-side chain guide portion arranged in separated swing portions,
A drive-side chain guide member that drives the endless chain in the drive-side chain guide portion, and at least two driven-side chain guide members that are spaced apart in the swivel direction of the endless chain in the driven-side chain guide portion. ,,
A support shaft that supports the first driven chain guide member is supported on the fixed side, and a moving shaft that supports the second driven chain guide member is supported so as to be movable in a direction in which tension is applied to the endless chain. And
A tension adjustment mechanism that adjusts the tension of the endless chain by urging the driven-side chain guide member supported by the moving shaft to maintain the tension between the drive-side chain guide portion;
The driven chain guide member supported by the support shaft is configured to be movable in the axial direction of the support shaft,
An endless chain drive mechanism characterized in that The driven-side chain guide member supported by the moving shaft cannot move in the axial direction of the moving shaft or has a moving amount smaller than the movable amount of the driven-side chain guide member supported by the supporting shaft. Limited,
The endless chain drive mechanism according to claim 1. Further comprising a guide member for limiting the swing of the endless chain to guide the endless chain between the separated revolving parts,
The distance by which the driven side chain guide member moves in the axial direction of the support shaft is set to be equal to the gap between the engaging member and the guide member of the endless chain,
The endless chain drive mechanism according to claim 1. A swing member that supports the driven chain guide member,
In the swing member, the first driven chain guide member is supported by the support shaft at one end, and the second driven chain guide member is supported by the moving shaft in the second driven chain guide member at the other end. The movable shaft side is swingable around the support shaft,
The tension adjusting mechanism adjusts an urging force of the oscillating member for urging the oscillating member in a direction in which the moving shaft side moves away from the drive side chain guide member around the support shaft, and an urging force of the urging member. And an adjustment mechanism,
The endless chain drive mechanism according to any one of claims 1 to 3. In the endless chain, a chain guide member side supported by the support shaft of the driven side chain guide portion is configured as a working side for elevating a load.
The endless chain drive mechanism according to any one of claims 1 to 4. A mechanical parking facility comprising the endless chain drive mechanism according to claim 1.
The drive side chain guide portion is provided on an upper portion of a frame member, and the driven side chain guide portion is provided on a lower portion of the frame member,
The tension adjusting mechanism is provided in the vicinity of the driven chain guide portion.
A mechanical parking facility characterized by this.

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