JPH0149875B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a pallet lifting device in a multi-layer circulation type parking facility called a box type circulation type mechanical parking facility.

The above-mentioned multi-layer circulation parking facility has a plurality of lateral transfer paths arranged in parallel in multiple layers and a hoistway placed at both ends of these paths, and a plurality of pallets P for mounting vehicles so that when stopped, two opposite corners of two adjacent layers are empty spaces. Place the
Alternately move up and down/traverse one pitch to pallet P
There are two wheels on the horizontal transfer path that can be engaged with a set of four wheels provided on the lower surface of the pallet P.
Traversal rails are installed in parallel, and each hoistway is equipped with a pallet lifting device 1 as shown in Figure 1.・Four pillars 4 are erected at a distance later, and a pair of sprockets 5, 6 are pivotally supported above and below each pillar 4, and both sprockets 5, 6
An endless lifting chain 7 is wound between them. Mounting metal fittings 9 for attaching the lifting rails 8 are attached to the lifting chain 7 at equal intervals. As shown in detail in FIGS. 2 and 3, this mounting bracket 9 is made of a cross-shaped member, and adjacent link plates 7a, 7a form link plates of the lifting chain 7.
are pivotally connected by roller pins 7a ₁ and 7a ₁ .
The left and right lifting chains 7 are paired, and the lifting rail 8 is installed horizontally between the corresponding mounting brackets 9. Reference numeral 10 denotes a tension sprocket for applying tension to the lifting chain 7; It is engaged with the pallet lifting side, and the lifting chain 7 is always urged in the tensioning direction by an elastic mechanism (not shown). Reference numeral 12 denotes a guide rail laid vertically along the pallet lifting side of the lifting chain 7, with two upper and lower guide rails 1 pivotally supported at each end of the lifting rail 8.
A set of guide rollers 13a and 13b engage with the guide rail 12 to sandwich it, and guide the elevating rail 8 when it moves up and down. 14 is the lifting rail 8
This is a curved guide rail for engaging and guiding the guide roller 13b when it turns around the upper and lower sprockets 5 and 6.

By the way, in this type of parking equipment, there are two main design conditions required for the above-mentioned pallet lifting device. One of them is to reduce the occupied space, and for this purpose, the above-mentioned upper and lower sprockets 5 and
needs to be made as small as possible. Another condition is that the lifting chain 7 must be circulated at high speed in order to quickly carry out loading and unloading operations.

However, in the case of the pallet lifting device 1 configured as described above,
a link plate 7a to which the mounting bracket 9 is adjacent;
Since it is pivotally connected to the roller pins 7a ₁ and 7a ₁ of 7a, one roller pin 7a ₁ approaches the reversed part of the upper or lower sprocket 5, 6, and then the other roller pin 7a ₁ reaches this reversed part. The so-called reversal transition period is very short, and especially when the diameters of the upper and lower sprockets 5, 6 are small, the mounting bracket 9 is swung outward by the strong centrifugal force accompanying the rapid increase in angular acceleration. In order to avoid this, a curved guide rail 14 is provided, but since the guide roller 13b and the curved guide rail 14 engage with each other during reversal, noise and vibration increase.

Furthermore, providing the curved guide rail 14 increases the aforementioned occupied space. Furthermore, lifting chain 7
As for the tensioning mechanism, since the lower sprocket 6 itself cannot be pulled down due to the installation of the curved guide rail 14, it is necessary to provide the tensioning sprocket 10 that extends the lifting chain 7 in the depth direction of the hoistway 2 as described above. This also leads to the aforementioned increase in occupied space.

In view of the above-mentioned circumstances, the present invention supports each of the above-mentioned mounting brackets at two locations above and below the chain roller pin separated by a distance of at least two pitches, and one of these supporting portions is an immovable pivot point with respect to the chain; The extension part of the roller pin is loosely engaged with the elongated hole formed in the vertical direction in the other support part, and one of the upper and lower sprockets is supported by a rotating shaft as a pair of left and right sprockets, and the rotating shaft is The end bearing body is supported so as to be movable only in the vertical direction relative to the fixed part of the hoistway, and a bearing body biasing means is interposed between the bearing body and the fixed part to bias the bearing body in the chain extension direction. It is an object of the present invention to provide a pallet lifting device for a multi-story mechanical parking facility, which is characterized in that tension is imparted to the lifting chain by doing this, and is intended to eliminate the above-mentioned drawbacks.

Hereinafter, a detailed description will be given based on the embodiments shown in FIGS. 4 to 16. For convenience of explanation, the left and right in Figures 4 and 5 are referred to as "left" and "right," and the left and right in Figure 6 are referred to as "rear."
It is called "Mae".

Reference numeral 20 denotes a parking space formed in the basement of the building 21, which accommodates a two-layer box-type circulation parking device 22, with left and right hoistways 23, 24 on the left and right sides of the parking device 22.
Of these, the right hoistway 24 extends toward the ground. The reception hoistway 24 forms a vehicle entry space 25 at the ground level, and the vehicle entry space 25 faces forward and communicates with an entry/exit port 26 .

The parking devices 22 are arranged in parallel and opposite directions.
Lower horizontal transfer paths 27a, 27b and the left and right hoistways 2
3 and 24 are formed in a rectangular shape in the vertical direction.
28a and 28b are the upper and lower lateral transfer paths 27a and 2
Front and rear 1 each fixedly arranged in parallel on 7b
A pair of transverse rails 29 are a plurality of vehicle mounting pallets connected in a daisy chain so that they can be detached only in the vertical direction. 28a, 28b so as to be rotatably engaged with the upper and lower lateral transfer paths 27a, 27b.
Upper and lower positions are provided at each of the
The lower pallet row can be traversed as a unit in opposite directions.

31 and 32 are the left and right hoistway 23, respectively.
The pallet lifting device 31 installed in the left pallet lifting device 31 has the same configuration except that they have different lengths in the vertical direction and are arranged symmetrically. Parts are given the same reference numerals, and parts of different lengths are given a '.

33 is the front and rear on the underground floor 20a of the left hoistway 23,
A support shaft 34 is mounted between the upper parts of the left and right pillars 33 and 33 by four pillars erected apart from each other on the left and right sides, and the support shaft 34 is mounted on the left and right parts of the support shaft 34. Two upper sprockets 35 are rotatably attached to the shaft.

In FIG. 9, 36 is a guide member fixed to the lower part of the left and right columns 33, 33, and 37 is each guide member 3.
A bearing body 6 is fitted to be vertically slidable, and 38 is a rotating shaft rotatably inserted between the left and right bearing bodies 37, 37, and the left and right parts are positioned directly below each of the upper sprockets 35. Two lower sprockets 39 are fixed to the upper and lower sprockets 39, and an endless lifting chain 40 is installed between the upper and lower sprockets 35 and 39, respectively.
is wrapped around it.

Reference numeral 41 denotes a guide rod that projects upright from the upper surface of each bearing body 37, and the upper part of the guide rod 41 is connected to the support column 3.
A hole protruding from the protruding piece 42 fixed to 3 (not shown)
A compression spring 43 is wound around the guide rod 41 between the projecting piece 42 and the upper surface of the bearing body 37, and the spring force of the compression spring 43 constantly moves each bearing body 37 and the rotating shaft 38 downward. The lifting chain 40 is energized to give tension to the lifting chain 40. That is, the lifting chain 40 includes the guide member 36, bearing body 37, guide rod 41, projection piece 42, and compression spring 43.
It constitutes a tension mechanism for

Reference numeral 44 denotes a box housing a worm reducer 45, through which the right extension of the rotating shaft 38 is inserted and rotatably supported, and a worm gear 46 is fixed to the extension. Reference numeral 47 denotes an arm whose base is pivotally connected to the support column 33 by a pin 48 so as to be able to swing vertically, and which has an engaging pin 49 protruding from its tip and which is cut into a bracket 50 vertically disposed on the lower surface of the box body 44. The engaging pin 49 is loosely inserted into the elongated hole 50a to allow the box body 44 to move downward, and the box body 44
It plays the role of stopping the rotation.

Reference numeral 51 denotes a reversible motor with a brake installed on the underground floor 20a, with a transmission shaft 52 extending in the front-rear direction, and a universal joint 53 at each end of the transmission shaft 52.
A power transmission extension shaft 54 is connected through. Furthermore, each transmission extension part 54 is inserted into the lower part of the box body 44 and supported by a worm 55 fixed to the transmission extension shaft 54.
is always meshed with the worm gear 46.

By driving the motor 51, the front and rear rotating shafts 38, 38 are rotated in opposite directions via the transmission shaft 52, the worm reducer 45, etc.

Reference numeral 56 denotes mounting brackets attached to each of the lifting chains 40 at equal intervals, and as shown in detail in FIGS. The member 57 is fitted and supported by two roller pins 40b, 40b having the same pitch as the link plate 40a.

58a and 58b are a pair of left and right substantially inverted triangular side plates, the upper part of which is pivoted by pins 59a and 59b concentrically protruding from the center of the left and right sides of the square-shaped member 57, and the lower part of which has a chain 40. Elongated holes 58b ₁ and 58a ₁ are cut in the extending direction. The roller pin 40c, which is 2.5 pitches away from the chain 40 below the pivot point of the pins 59a and 59b, is specially extended to the left and right.
The right end portions are loosely inserted into the elongated holes 58a ₁ and 58b ₁ .

Reference numeral 60 denotes a lifting rail with a rectangular cross section that is installed horizontally between the left and right mounting brackets 56, 56 in the left and right lifting chains 40, and the side plates 58a, 58
The lower edge of the elevating rail 60 is fitted and fixed into the upper edge notch b to hold it horizontally.

61 and 62 are the transverse rails 28a and 62, respectively.
28b and the joint rail fixed to the facing surfaces of the lifting rail 60 form a slope that slopes downward in the direction of the mutually opposing ends so as to compensate for the stopping position of the lifting rail 60.

Reference numeral 64 denotes a set of two guide rollers that are pivotally supported at a slight distance from each other in the front, rear, left and right directions via appropriate brackets 63 vertically installed at both ends of the lifting rail 60.
The guide rail 65 vertically supported along the inside of the right support column 33 can be engaged in a clamping manner at the front and rear of the guide rail 65 so as to guide the elevating rail 60 when it goes up and down. The upper and lower ends of the guide rail 65 are located at a height slightly lower than the upper sprocket 35 and slightly higher than the lower sprocket 39, respectively.

Next, the operation of the entire parking equipment including the pallet lifting device of the present invention will be explained.

Now, as the initial state of the parking device 22, as shown in FIG.
, each lifting rail 60 is connected to the transverse rails 28a, 28
b, and the multiple pallets 29 are
All of the lower horizontal transfer paths 27a and 27b are connected to the lower and upper lifting rails 60 of the left and right hoistways 31 and 32, respectively, and the left and right hoistways 31 and 3 are connected to each other.
2, the upper and lower lifting rails 60 are empty spaces.

From the above state, for example, in order to exit the vehicle W located in the middle of the lower lateral transfer path 27b, the entrance 26
When the "request for delivery" button on the operation panel (not shown) is operated, the pallets 29 are circulated in the counterclockwise direction in FIG. 5 in the following manner. That is, first, the traversing devices of the upper and lower lateral transfer paths 27a and 27b are driven, and the 29 rows of upper and lower pallets are integrally traversed by one pallet to the left and right, respectively. As a result, palette 29 at the left end of the upper row
is the upper lifting rail 6 of the left pallet lifting device 31
0, and the pallet 29 at the right end of the lower row moves to the lower lifting rail 60 of the right end pallet lifting device 32. Next, the left and right pallet lifting devices 31, 3
By driving each motor 51 of 2, the left and right hoistway 2
3 and 24, the lifting rail 60 is
Lowers and raises only steps. By alternately performing such traversing and lifting, the desired pallet 29 carrying the vehicle W is moved to the lower lifting rail 60 of the right hoistway 24.

And the motor 51 of the right pallet lifting device 32
If the lifting rail 60 carrying the desired pallet 29 is raised two steps by driving only the desired pallet 29, the desired pallet 29
reaches the vehicle entry space 25 and causes the vehicle W to leave the garage via the entry/exit entrance 26. After leaving the warehouse, the motor 5
1 in the opposite direction to lower the elevator rail 60 and return the empty pallet 29 to its original lower position.

In order to shorten the time required for the aforementioned loading and unloading as much as possible, it is particularly necessary to circulate the lifting chains 40 of the pallet lifting and lowering devices 31 and 32 at high speed. When the lifting rail 60 mounted on the pallet 29 is raised or lowered by one stage, the other lifting rails 60 rotate around the upper and lower sprockets 35 and 39 at high speed. During this rotation, one of the two supporting parts of the mounting bracket 56 for the chain 40, that is, the pins 59a, 59b or the roller pin 40c, approaches the reversed part of the sprockets 35, 39 first, and after the chain 40 has circulated 2.5 pitches, the other one The support section also follows and reaches the reversal section. The lifting chain 40 of the mounting bracket 56 is connected to the upper and lower sprockets 3.
5 and 39, and the linear distance between the pins 59a and 59b and the roller pin 40c is slightly shorter,
The shortened portion is absorbed by the elongated holes 58a ₁ and 58b ₁ .

In this case, the mounting bracket 56 at the inlet of the reversing section
The angular acceleration applied to the lifting rail 60 gradually increases compared to the conventional one-pitch rail, and gradually decreases at the exit portion. Therefore, there is little vibration at the entrance and exit of the reversing section due to the centrifugal force of the lifting rail 60, etc., so there is no need to provide any guide means.
The engagement between the guide rollers 64, 64 and the guide rail 65 is performed smoothly and quietly.

In the above embodiment, the compression spring 43 was used as a tension mechanism for the lifting chain 40, but this compression spring 43 was removed and a push screw rod with a male thread cut on the upper part of the guide rod 41 was used, and an adjustment nut and a lock nut were installed. It is also possible to tension the lifting chain 40 by lowering the push screw rod and pushing down the bearing body 37 and rotating shaft 38 at appropriate times.

Further, the pitch of the mounting fittings 56 may be at least 2 pitches or more, and is not limited to 2.5 pitches.

As detailed above, according to the pallet lifting device according to the present invention, the mounting bracket for attaching the lifting rail is supported at two locations of the chain roller pin separated by at least two pitches, so that there is a sudden increase in angular acceleration when reversing at the sprocket portion. The chain can be circulated at high speed even with a relatively small sprocket, reducing loading and unloading time. Also, there is no need for a conventional curved guide rail around the reversing section, and a bearing body is used as the chain tensioning mechanism. Since we have adopted a mechanism that pushes down the rotating shaft and lower sprocket vertically downward, the extra space required to stretch the chain horizontally is no longer required, and the space required for the pallet lifting device is minimized. This has many effects, such as reducing equipment costs.

[Brief explanation of drawings]

Figures 1 to 3 show a conventional pallet lifting device. Figure 1 is a side view of the main parts, Figure 2 is an enlarged view of Figure 1 in the direction of arrows ~, and Figure 3 is an enlarged view of Figure 2 in the direction of arrows. It is a diagram. Figures 4 to 13 all show embodiments of the present invention, and Figure 4 is a plan view of the entire parking facility;
5 is a front view of FIG. 4 in the direction of the arrows, FIG. 6 is an enlarged side view of FIG. 4 in the direction of the arrows, FIG. 7 is an enlarged view of FIG. 6 in the direction of the arrows, and FIG. Figure 9 is an enlarged view of Figure 4 in the direction of the arrows.
0 and 11 are views taken in the direction of the arrows .about. and .about. in FIG. 9, respectively. FIG. 12 is an enlarged view in the direction of the arrows .about. in FIG. 4, and FIG. 13 is a view taken in the direction of the arrows .about. in FIG. In the figure, 29 is a pallet, 31 and 32 are pallet lifting devices, 35 is an upper sprocket, 37 is a bearing body, 38 is a rotating shaft, 39 is a lower sprocket, 4
0 is a lifting chain, 56 is a mounting bracket, and 60 is a lifting rail.

Claims (1)

[Claims] 1. A hoistway formed at the ends of a plurality of lateral transfer paths on which traverse rails are laid, and a hoistway with front, rear, left, and
Four lifting chains spaced apart on the right and wound between the upper and lower sprockets, a plurality of mounting brackets attached to each lifting chain at equal intervals, and the left side of the lifting chain.・It consists of a lifting rail horizontally suspended between the mounting brackets that correspond horizontally to each other on the right side, and when the circulation of the lifting chain is stopped, the lifting rail is closely connected to the traversing rail part and the rail is connected between the two rails. In the device, the pallets can be transferred and the pallets can be raised and lowered by circulation of a lifting chain, and each of the mounting brackets is supported at two locations above and below, separated by a distance of at least two pitches of the chain roller pin. One of these supporting parts is an immovable pivot point with respect to the chain, and the other supporting part has an extension part of the roller pin loosely engaged with an elongated hole formed in the vertical direction, and the upper and lower sprockets are connected to each other. Either one of them is supported as a left and right pair by a rotating shaft, and a bearing body at the end of the rotating shaft is supported movably only in the vertical direction relative to a fixed part of the hoistway, and between the bearing body and the fixed part A pallet lifting and lowering device for a multi-story mechanical parking facility, characterized in that tension is applied to the lifting chain by interposing a bearing body urging means in the chain extension direction to urge the bearing body in the chain extension direction. 2. A pallet lifting device in a multi-story mechanical parking facility according to claim 1, wherein the bearing body biasing means comprises a guide rod protruding from the upper surface of the bearing body and a compression spring wound around the guide rod. .