JPH0644905Y2 - Inter-rail correction mechanism in transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vertical transfer path having a horizontal transfer path on which a horizontal rail is laid, and a vertical feed rail that circulates vertically in a side portion of the horizontal transfer path. In the transfer device that can transfer a transfer pallet in which wheels mounted on the lower surface are engaged with a traverse rail or a vertical feed rail between both transfer paths,
The present invention relates to a rail-to-rail correction mechanism that corrects a mismatch between horizontal rails.

(Prior Art) As an example of the above-mentioned transfer device, as shown in a part in FIGS. 6 and 7, it opposes on a vertical / horizontal transfer path 1 or 2 which is arranged in a rectangular shape and has two vertical and horizontal addresses. A horizontal circulating parking system is known in which a plurality of vehicle-mounted pallets 3 are arranged so that two corners become empty spaces, and the pallets 3 are alternately moved vertically and horizontally by one pitch to circulate. In this parking device, two parallel horizontal rails 4a and 4b are fixedly laid on each horizontal transfer path 2, and the vertical transfer path 1 is sandwiched as a vertical feed mechanism for the pallet 3 in the vertical transfer path 1. Front and rear sprockets 5 and 6 for the left and right, respectively, are arranged separately from the front and rear, and two left and right endless chains 7 are provided between the front and rear sprockets 5 and 6 corresponding to the front and rear. The endless chains 7 and the pallet 3 at a predetermined vertical feed pitch P ₁ (corresponding traverse rails of the front and rear transverse transfer paths 2
Corresponding to the space between 4a and 4b and the space between 4b and 4b), multiple mounting brackets 8 are attached, and mounting brackets 8.8 corresponding to the left and right
A vertical feed rail 9 is laid horizontally between the endless chains 7, and a guide rail (not shown) for horizontally guiding the vertical feed rail 9 is laid along at least the upper movement path of the endless chain 7, and when the endless chain 7 stops moving. The ends of the vertical feed rails 9 located on the upper movement path are closely connected to the ends of the corresponding transverse rails 4a and 4b. Also, the front and rear sprockets 5
One of the 6 is connected to the drive source 10 as the drive side sprocket 5, and the other driven side sprocket 6 is separated from the drive side sprocket 5 by the elastic urging mechanism 11 as appropriate in order to maintain the tension state of the endless chain 7. Always urge the
The extension of the endless chain 7 that occurs during long-term operation is absorbed. Therefore, with the extension of the endless chain 7, the pitch P ₂ of the corresponding vertical feed rails 9 and 9 becomes slightly longer than the vertical feed pitch P ₁ , so that the end of the vertical feed rail 9 is a traverse rail when the movement is stopped. The position of the edges 4a and 4b gradually shifts. If this positional deviation becomes large, the wheels 3a of the pallet 3 will rattle when passing through both rails 4a, 4b, 9 and eventually the risk of derailing will occur.

Conventionally, as a mechanism for correcting the misalignment of the rails 4a, 4b, 9 described above, the bracket 9a of the mounting bracket 8 and the vertical feed rail 9 is used.
The serration S was engraved on the abutment surface with and the engagement of the serration S was shifted.

(Problems to be solved by the invention) Now, the endless chain 7 is provided by the mechanism for correcting the rail misalignment.
Assuming that the ends of the vertical feed rail 9 in the upper movement path of are aligned with the ends of the corresponding traverse rails 4a and 4b and are re-attached to the mounting bracket 8 by shifting the engagement of the serration S ( 7), the pitch of the corresponding vertical feed rails 9 and 9 in the upper moving path is corrected from P ₂ to P _1, but the pitch of the corresponding vertical feed rails 9 and 9 in the lower moving path is P. remains _2, ranging between pitches below the movement path and the upper movement path changes to the P ₁ and P ₂ differ P _3. That is, this correction mechanism inevitably causes a deviation in the pitch of the corresponding vertical feed rail 9 and 9 and cannot strictly correct the misalignment between the vertical and horizontal rails.

(Means for Solving Problems) In the inter-rail correction mechanism of the present invention, even if the endless chain extends, the pitches of the corresponding vertical feed rails are uniform, and the wheels of the pallet are provided with flanges on the inside in the vertical direction. Paying attention to the fact that the width of the rolling roller can be widened by an amount equivalent to the width of the rolling roller, the end of the traverse rail is cut off to an appropriate length, and the correction rail is arranged on a fixed horizontal bracket at the cutout part. Then, the base portion of the correction rail is fastened to the bracket by the vertical support bolts, and the middle portion is fastened to the elongated hole formed in the bracket by the vertical adjustment bolts. It is characterized in that it is aligned with the end of the feed rail and fixed so that the position can be adjusted.

(Function) When the endless chain stretches and the misalignment of the vertical and horizontal rails becomes noticeable, loosen the fastening bolts of each correction rail and align the end of the correction rail on the vertical transfer path side with the end of the vertical feed rail. Simply tighten the fastening bolts again. Therefore, the pitch of the end of the correction rail is adjusted to the pitch of the vertical feed rail that is evenly spread by the extension of the endless chain, and the wheels of the pallet can relatively smoothly pass between the traverse rail and the vertical feed rail via the correction rail. Like

(Example) Hereinafter, a detailed description will be given based on an example shown in FIGS. For convenience of explanation, the left and right in FIG. 1 are referred to as “left” and “right”, and the right and left in FIGS. 2 and 3 are referred to as “front” and “rear”.

Reference numerals 20a and 20b and 21a and 21b are parallel transfer paths and vertical transfer paths, which are parallel to each other, and 22a and 22b are fixedly laid in parallel on the horizontal transfer paths 20a and 20b, respectively. It is a traverse rail addressed to.

Numeral 23 is a pallet for mounting on a vehicle, and when the circulation movement is stopped, one is provided in each of the horizontal transfer passages 20a and 20b and one in the vertical transfer passages 21a and 21b so that an empty space is formed diagonally in both the vertical transfer passages 21a and 21b. The male and female connecting fittings 23a fixedly connected to each other and fixed to the front and rear of the left and right side surfaces are used to connect the pallets to each other in the horizontal direction and to engage and disengage the pallets in the vertical direction.

Furthermore, the pallet 23 pivotally supports wheels 23b with flanges on the bottom left / right, front / rear, and rolls the wheels 23b on the traverse rails 22a / 22b with the flanges facing inward so that they cannot be removed. It is supported in common.

Reference numeral 24 denotes a lateral feed mechanism provided in association with the lateral transfer paths 20a and 20b, and pivoting links 24a and 24b rotatably supporting the center of the horizontal transfer paths 20a and 20b on the floor inside the central portion of the lateral transfer paths 20a and 20b. By turning in the opposite direction, the front and rear lateral transfer paths
Twenty-three rows of 20a and 20b pallets are designed to be fed horizontally in the opposite direction.

Reference numeral 25, 25 is a vertical feed mechanism provided in association with the vertical transfer paths 21a, 21b. Since the left and right have the same configuration, the right vertical feed mechanism is provided.
Only 25 will be described below.

25a and 25b are bearings 26a and 25a on the front and rear floors of the vertical transfer path 21a.
A rotary shaft rotatably supported horizontally by 26b. The front and rear sprockets 27a and 27b are fixed to the rotary shafts 25a and 25b separately from each other, and the front and rear sprockets 27a and 27b are fixed to the front and rear sprockets 27a.・ There are two endless chains 28 between 27b.
・ 28 is wrapped. A reduction gear and a reversible motor with a brake 29 are connected to the right extension end of the rotary shaft 25a on the drive side. Then, by driving the motor 29, the rotary shafts 25a and 25b and the front and rear sprockets 27a and 27b
The endless chain 28 of strips is arranged to circulate synchronously.

31a and 31b are arranged in parallel with each other so as to extend in the left-right direction between the two endless chains 28 and 28 so as to extend in the left-right direction.
With one set of four vertical feed rails, the tip inclined part te1 is formed only on the front / rear inner side at the tip of the side facing the horizontal transfer paths 20a and 20b, and the corresponding vertical feed rails 31a and 31a of the adjacent set are formed. And the distance between 31b and 31b are set equal to the vertical feed pitch P of the pallet 23, that is, the distance between the front traverse rails 22a and 22a (or the distance between the rear traverse rails 22b and 22b), and the total length L of the endless chain 28. Is set to be four times as long as the pitch P.

The means for attaching each of the vertical feed rails 31a and 31b to the endless chain 28 is as follows. That is, reference numeral 32 denotes a mounting bracket attached to each of the endless chains 28 corresponding to the vertical feed pitch P, which is composed of a pair of left and right mounting plates, and the mounting plates are arranged on both left and right sides of the link plate 28a of the endless chain 28. The outer right-angled horizontal part is formed in the upper part. Reference numeral 33 is a horizontal horizontal horizontal bracket fixed to the lower surfaces of the left and right parts of the vertical feed rails 31a and 31b, and the lower part is fitted into a shallow recess that is cut right and left through the upper surface of the outer right-angled horizontal part. The bolts 34 are attached to the front and rear, and are fixed integrally with the outer horizontal right angle portion.

Reference numeral 35 is a guide roller assembly fixed to the lower surface near the left and right ends of each of the vertical feed rails 31a and 31b.
36 · 36 is pivoted.

37 are four guide rails installed on the outside of each of the endless chains 28 along the upper and lower front-rear horizontal movement paths, a total of four guide rails for the left, right, and each of the guides when the endless chains 28 are circulatingly moved. The front and rear guide rollers 36, 36 of the roller assembly 35 are placed in engagement and rolled to guide the vertical feed rails 31a, 31b horizontally.

As shown in detail in FIGS. 3 and 4, the transverse rails 22a and 22b are formed by notching the upper portions of the left and right end portions as appropriate,
A horizontal bracket 38 is fixedly mounted on a ₁ and 22b ₁ (22b ₁ not shown), and an arcuate elongated hole 38a in the left-right direction is cut in the middle portion. Then, on the bracket 38, a short correction rail 39 having a tapered inclined portion te2 formed on the inner surface of the tip is placed, the base portion is integrally fastened to the bracket 38 by a support bolt 40, and the adjustment bolt 41 is provided at the middle portion with the elongated hole. It is fastened integrally with the bracket 38 while being loosely inserted in the 38a.

Therefore, in the parking device having the above-mentioned configuration, the lateral feed mechanism 24
By alternately driving the vertical feed mechanism 25 and the vertical feed mechanism 25, left and right opposite horizontal feed and vertical feed of three rows of front and rear pallets are performed so that the two opposite corners become empty spaces on the horizontal feed paths 20a and 20b and the vertical feed paths 21a and 21b. The pallets 3, which can be placed one on the roads 21a and 21b, are cyclically moved in the vertical and horizontal 1 pitches alternately by front and rear facing longitudinal feed.

At the beginning of operation of the drive unit, as shown by the solid line in FIG.
(Or 31b), correction rail 39, traverse rail 22a (or 2
2b) are aligned and the wheels 23b of the pallet 23 pass smoothly between these rails. However, when the operation continues for a long time,
The endless chain 28 stretches. If this elongation is ΔL, the pitch P (= L / 4) of the vertical feed rails 31a and 31b becomes longer to P '{= (L + ΔL) / 4}. Of course, even if the endless chain 28 extends, the pitch P ′ does not change evenly (see FIG. 5). Therefore, when the vertical feed is stopped, the vertical feed rail 31a shown by the chain double-dashed line is displaced in the left-right direction with respect to the correction rail 39 shown by the solid line in FIG. 3, and the tapered inclined portions te1 and te2 of both rails are misaligned. When the wheel 23b passes through this crossing portion, rattling occurs, and if this positional deviation further increases, there is a risk of derailment.

In such a case, after temporarily stopping the operation of the device, the support bolt 40 and the adjustment bolt 41 are loosened for each correction rail 39, and as shown by the two-dot chain line in FIG. Swing horizontally with the fulcrum as
Tapered inclined portion te1 of a.
2 Tighten the support bolt 40 and the adjustment bolt 41 together with the tip edges aligned. Normally, stop of the vertical feed is performed by providing a limit switch on an extension line of one traverse rail and engaging the limit switch with a corresponding vertical feed rail. If a limit switch (not shown) is provided on the extension line of the transverse rail 22b on the rear transverse rail 22b of the transverse transport path 20a on the front side, the limit switch corresponds to one of the vertical feed rails 31b. The vertical feed operation of one pitch is stopped each time one of them is engaged. Therefore, when the endless chain 28 extends, the resilient urging mechanism 30 causes the driven side sprocket 27b and the bearing 26b to integrally move rearward. At this time, the vertical feed rail 31b is aligned with the reference horizontal rail 22b and the correction rail 39, and the vertical feed rail 31a located in front of the vertical feed rail 31b is forward of the corresponding horizontal rail 22a. The vertical feed rails 31a and 31b, which are displaced and located rearward, correspond to the corresponding traverse rails 22a and 22b in the rear lateral transfer path 20b.
On the other hand, both are displaced backward. Therefore, as shown in FIG. 5, only the correction rail 39 of the reference traverse rail 22b remains straight and no adjustment is required, and the other three correction rails 39 are used.
Is the vertical feed rail 31a corresponding to the above procedure (Fig. 3).
・ Match adjustment to 31b.

In the above-mentioned embodiment, the horizontal circulation type parking device having the vertical and horizontal transfer paths for two rows has been described. However, the transfer device is provided with the vertical transfer path on the side of one horizontal transfer path in a direction perpendicular to the horizontal transfer path. Can also be applied to. In this case, the pallet with wheels for loading articles is loaded with articles at one end of the horizontal transfer path, travels along the traverse rail, is transferred to the vertical feed rail of the vertical transfer path, and is transferred at the end of the vertical transfer path. And the empty pallet is returned to one end of the lateral transfer path by a suitable conveying means.

Further, in the above embodiment, all four traverse rails are used.
Although the correction rail 39 is provided by omitting both ends of 22a and 22b, the correction rail does not necessarily have to be provided for the traverse rail which is the reference for the vertical feed stop.

(Effect of the Invention) As described above, according to the rail-to-rail correction mechanism of the present invention, instead of adjusting the pitch of the vertical feed rail to the traverse rail as in the conventional case, a part of the end of the traverse rail is cut away. ,
A correction rail is arranged on a fixed horizontal bracket in the lacking portion, the base portion of the correction rail is fastened to the bracket by a vertical support bolt, and an intermediate portion is formed into an elongated hole formed in the bracket. It is fastened with vertical adjustment bolts, the tip of the correction rail is aligned with the end of the vertical feed rail and fixed so that the position can be adjusted, and the pitch of the vertical feed rail is lengthened evenly by the extension of the endless chain. Since the end pitch of the compensating rails is adjusted to 4 mm, accurate inter-rail compensation can be performed at all times, and 4
This has a great effect with a simple structure, such as loosening and re-tightening the bolts on the correction rail of the book.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is an overall plan view of a horizontal circulation type parking device adopted as a transfer device, and FIG. 2 is a view taken along arrows II to II in FIG. FIG. 3 is a side view, FIG. 3 is an enlarged plan view taken along line III-III of FIG. 2, and FIG.
IV to IV are enlarged side views as seen from the arrows, and FIG. FIG. 6 is an explanatory view of an operation corresponding to FIG. 5 showing a conventional example, and FIG. 7 is a sectional view showing a conventional means for mounting a vertical feed rail. In the figure, 20a and 20b are horizontal transfer paths, 21a and 21b are vertical transfer paths, and 22a.
・ 22b is a traverse rail, 23 is a pallet, 23b is a wheel, 25 is a vertical feed mechanism, 28 is an endless chain, 31a and 31b are vertical feed rails,
39 is a correction rail.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Publication Sho 52-22192 (JP, B2) Actual Public Sho 43-13065 (JP, Y1) Actual Public Sho 52-37414 (JP, Y2) Actual Public Sho 52- 35764 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A horizontal transfer path in which at least two horizontal rails are laid parallel to each other in the front-rear direction, and a vertical transfer path extending at a side portion of the horizontal transfer path in a direction perpendicular to the horizontal transfer path. , A plurality of vertical feed rails are attached at a predetermined pitch to an endless chain that circulates in the vertical direction in the vertical transfer path, and the end of the vertical feed rail is close to the end of the traverse rail when the movement of the endless chain is stopped. In a transfer device which is connected and allows wheels mounted on the lower surface of the transfer pallet to pass between the vertical feed rail and the traverse rail, an end portion of the traverse rail is cut to an appropriate length and The correction rail is arranged on a fixed horizontal bracket, the base portion of the correction rail is fastened to the bracket by the vertical support bolts, and the intermediate portion is vertically adjusted in the long hole formed in the bracket. Fasten with bolts Rail is characterized in that the tip was extreme positions adjustably fixed in alignment to the portion of the longitudinal feed rails, the rails between the correction mechanism in the transfer device.