JPH02300012A - Accumulate shuttle conveyor - Google Patents

Abstract

PURPOSE:To enable transfer of articles with different sizes with a simple structure in an accumulate shuttle conveyor used in warehouse or the like by reciprocating a transfer body of long flat board at a constant stroke, and providing a stopping means for preventing reversal running of articles to be transferred at every constant interval. CONSTITUTION:A long flat board 2 of a conveyor 1 reciprocates on a support board 13 via a rotary shaft, crank and link (not shown). Thus an article A2 moves in the transfer direction by one stroke. Meanwhile, the article A2 pushes the upper part of an engaging board 15 from the rear side to rotate an engaging/locking board 15 against spring and to advance over the board 15. When the long and flat board 2 returns, the article A2 engages with the board 15 erected being incapable of rotating and stays at the position without following the returning of the board 2. With the simple structure, various sized articles are applicable.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an accumulation shuttle conveyor for conveying and accumulating articles.

The accumulation shuttle conveyor transports items from the input end to the output end, then sequentially accumulates them at the output end, and transports them from the output end when necessary. Widely used in factories and factories.

These accumulation conveyors include those in which the rollers are driven by an endless belt stretched in contact with the lower surface of the rollers, those in which a sprocket attached to the end of the roller shaft of the roller conveyor is driven by an endless chain, and those in which the rollers are driven by an endless chain. Shuttle conveyors that use dogs are common.

In conveyors that drive Shijiji rollers by belts or chains, if the transported goods are heavy, there is severe wear between the bottom of the transported goods and the rollers during accumulation, as well as between the rollers and the belt.Also, in shuttle conveyors that use dogs, there is severe wear during accumulation. There is a problem with the dog scraping the bottom of the transported item.

In order to solve this problem, there has been an accumulation shuttle conveyor equipped with a sensor for detecting the leading cylinder, as shown in FIG.

(Refer to Japanese Patent Publication No. 59-17686) In the accumulate shuttle conveyor O1, a dog 04 attached to a reciprocating body 02 and held in an upright state by a magnet 03 is capable of transporting objects 05 one pitch at a time. In addition, a detection rod 06 for detecting the presence or absence of an object to be conveyed is rotatably attached to a shaft 07, and a hook 08 and a dog 04 are provided at the rear end of the detection rod 06. It is possible to engage with the engagement piece 09.

Therefore, by counterclockwise rotation of the detection rod 06 at the left end of the drawing, the hook 08 at the rear end of the detection rod 06 is raised, and the object to be transported 05 at the left end is accumulated so that the dog 04 at that position maintains the retracted posture.

In this way, the conveyed objects 05 are sequentially packed to the left and accumulated. The dog 04, which reciprocates below the accumulated object 05, maintains a retracted posture and does not scrape the bottom surface of the object 05.

However, such an accumulation shuttle conveyor 01 requires a control mechanism using the detection rod 06, resulting in a mechanically complicated structure, which causes troublesome maintenance and inspection. The tip of the detection rod 06 and the rear dog 04
Since the distance to the object 05 and the length of the object 05 to be transported are related to the accumulation control, only objects of a certain size could be transported.

The present invention relates to an accumulation shuttle conveyor that overcomes these difficulties, and is a conveyor for conveying and accumulating objects along a conveyance path. hand,
A transport body is provided on which the object to be transported is placed and reciprocated at a constant stroke in the extending direction of the transport path, and a braking means is provided at fixed positions at regular intervals to stop the object from moving backward. It is characterized by this.

Further, the present invention is characterized in that the transfer body is a long material.

Furthermore, the present invention is characterized in that the transfer body is a roller or a wheel conveyor rail.

Furthermore, the present invention is characterized in that the accumulate shuttle conveyor is slightly inclined to such an extent that the conveyed objects do not move by themselves from the carry-in end to the discharge end.

Since the present invention is configured as described above, the object to be conveyed is placed on the reciprocating transfer body and sent forward by one stroke, and at that position, the reverse movement is stopped by the braking means, and the object is placed next to the transfer body. As a result of the forward movement, the next conveyed object can be sent forward one stroke further, and the next conveyed object can come into contact with the accumulated conveyed object at the discharge end, so that the next conveyed object can be automatically accumulated one by one.

Further, in the present invention, since the transfer body can be constructed of a long material, the number of parts can be reduced and the structure can be simplified.

Furthermore, in the present invention, when the transfer body is a roller or a wheel conveyor rail, the roller or wheel rotates along the lower surface of the conveyed object when accumulating the conveyed object, so that friction between the conveyed object and the conveyed object is reduced. can be made extremely small.

Furthermore, in the present invention, when the accumulation shuttle conveyor is slightly inclined to such an extent that the transported object cannot move by itself from the carry-in end to the discharge end, the transported object is transported. The power for this can be small, and the force applied to the braking means from the conveyed object can also be small.

An embodiment of the present invention illustrated in FIGS. 2 to 11 will be described below.

In the accumulate shuttle conveyor 1, as shown in FIGS. 2 to 8, a stainless steel long flat plate 2 (corresponding to the long material in claim 2) is a transporting body. It is arranged substantially horizontally in the conveyance direction on the support stand 18, and both edges of the long flat plate 2 are further bent from below toward the center to form bent parts 2a and 2b, and the widthwise center of the back surface A frame body 3 having a hat-shaped cross section is integrally fixed along the longitudinal direction.

Further, a motor 4 is integrally mounted on the support base 18, a crank 5 is integrally connected to the rotating shaft 4a of the motor 4, and one end of a link 6 is rotatably pivoted to the tip of the crank 5. The other end is pivotally supported on the frame 3 by a shaft 7.

A support frame 9 is fixed on a support stand 18 inside the bent portions 2a and 2b of both edges of the long flat plate 2, and a large number of support rollers 8 are rotatably supported on this support frame 9 by a shaft 10. The long flat plate 2 is supported so as to be slidable in its longitudinal direction. In addition, at several locations between the support rollers 8, horizontal guide rollers 11 are rotatably supported on the support frame 9 by vertically oriented shafts 12 in contact with the inner surface of the bent portion 2a of the long flat plate 2. There is.

Furthermore, on both sides of the long flat plate 2, as shown in FIG. The support plate 13 extends substantially horizontally in the transport direction at a low height and is fixed to the support stand I8, and the outer edge of the support plate 13 is bent upward to form a guide part 13a for the transported object. The portion is a downwardly directed recessed portion 13b, and a large number of braking means 14 are provided at regular intervals in the recessed portion 13b.

The braking means 14 extends through a channel-shaped locking plate 15 and both side portions 15a formed by bending both sides of the locking plate 15 forward in the conveyance direction, and swingably connects the locking plate to the support plate 13. 15, and a spring 17 which is wound around the shaft 16 and has both ends engaged with the upper surface of the recess 13b of the locking plate 15 and the support plate 13 to bias the locking plate 15 into an upright state. The spacing between the shafts 16 is 2 of the rotation radius of the crank 5.
It is set slightly shorter than double.

Further, the upper front part of the bent portion 15a of the locking plate 15 is
A locking portion 15b is formed which can lock along the rear surface of the conveyed object A, which extends downward on the road when the conveyor belt 5 is in an upright state.

Furthermore, a stopper 19 is provided at the unloading end of the support stand 18, and the distance between this stopper 19 and the locking plate 15 closest to it is set to be slightly longer than the dimension of the smallest object A in the transport direction.

Since the accumulate shuttle conveyor 1 shown in FIGS. 2 to 8 is constructed as described above, when the motor 4 is driven, the rotation of the rotating shaft 4a is transmitted to the frame body 3 through the crank 5 and the link 6. The long flat plate 2 is supported by the support roller 8 and guided by the guide roller 11, and reciprocated by a certain distance in the conveyance direction.

Therefore, the conveyed object A fed onto the conveyor from the carry-in end (not shown) on the right side of FIG. 2 moves one stroke in the conveyance direction of the long flat plate 2 while being placed on the long flat plate 2, during which The conveyed object A can push the upper part of the locking plate 15 from behind, rotate the locking plate 15 to the retracted position against the spring 17, and move above it.

Immediately after the long flat plate 2 starts to move backward in the direction opposite to the conveying direction The conveyed object A is locked by the locking portion 15b of the locking plate 15, and its backward movement is stopped.

In this way, the object A to be conveyed is conveyed toward the discharge end on the left side in FIG. 2 with each stroke as the long flat plate 2 reciprocates.

Further, the operation of the accumulate shuttle conveyor 1 will be explained with reference to the schematic operation diagrams shown in FIGS. 9 to 11.

The previous conveyed object A1 advances toward the discharge end side by the reciprocating motion of the long flat plate 2, and when the long flat plate 2 retreats as shown in FIG. Locking plate 1
5, the backward movement is stopped. Then, due to the next forward movement of the long flat plate 2, the transported object A is moved as shown in FIG.
When I reaches the unloading end, the strapper 19 removes the transported object A.
1 is stopped from moving forward further, and even if the long flat plate 2 moves back as shown in FIG. It will be accumulated.

Further, due to the continuous reciprocating movement of the long flat plate 2, the next conveyed object ^2 moves forward, and when it comes into contact with the previously accumulated conveyed object A1, the conveyed object's side is also accumulated on the spot. It will be rated.

In the embodiments shown in FIGS. 2 to 11, a long flat plate 2 is used as the transfer body, and since it supports the entire bottom surface of the object A, Even during accumulation, there is no local friction with the bottom surface, and the transported object A is less likely to be damaged.

The accumulate shuttle conveyor 1 of this embodiment is suitable for conveying relatively lightweight materials such as plastic containers and cardboard boxes.

In another embodiment shown in FIG. 12, the conveying body is a ribbed long flat plate 20 made of stainless steel, which is a long material, and has a semicircular cross section oriented in the conveying direction.
a is formed to stabilize the direction of the conveyed object in the conveyance direction.

In another embodiment shown in FIG. 13, the conveying body has a long flat plate 21 made of stainless steel with a protrusion 21a having a rectangular cross section oriented in the conveying direction, and a back plate 22 on the back surface. is stretched and reinforced, and the frame body 23 is fixed.

Further, other embodiments shown in FIGS. 14 to 21 will be described.

In the accumulate shuttle conveyor 30, the conveying body is composed of roller conveyor rails 31 arranged in two rows on both sides in the conveying direction, and in each roller conveyor rail 31, a large number of rollers 32 are pivoted on a first support frame 33. 3
4, it is rotatably supported. This first support frame 33 is further fixed to a second support frame 35, and the second support frame 33 is fixed to a second support frame 35.
5, a support roller 36 is rotatably supported by a horizontal shaft 37, and this support roller 36 is slidably disposed within a guide rail 40 fixed to a support stand 45, and is vertically supported by the second support frame 35. A horizontal guide roller 38 is rotatably supported by a shaft 39, and the horizontal guide roller 38 is arranged along the inner surface of the guide rail 40.

Further, on the bottom of the second support frame 35, a motor 4 is mounted on the support base 45.
The tip of a link 43 is rotatably connected to the tip of a crank 42 which is integrally connected to the rotating shaft 41a of the motor 41, and the other end of the link 43 is connected to a second crank 42 via a shaft 44. It is rotatably connected to the support frame 35.

Furthermore, at the center in the width direction between the two roller conveyor rails 31, a support frame 47 having a hat-shaped cross section is fixed to a support frame 48 integrated with the support base 45, with its upper surface slightly lower than the rollers 32. There is. Braking means 49 are installed within the support frame 48 at regular intervals.

A locking plate 50 constituting the braking means 49 is bent at both upper and lower ends to form bent portions 50a and 50b, and a shaft 52 is swingable on a ring 51 attached to the locking plate 50. When fitted, the shaft 52 penetrates the support frame 47. Normally, this locking plate 50 is attached to the support frame 4 due to its own weight.
It is designed to maintain an upright position protruding from 7.

Note that the arrangement intervals of the locking plates 50 are set in the same manner as in the first embodiment.

Since the embodiment shown in FIGS. 14 to 21 is configured as described above, the left and right roller conveyor rails 31 are reciprocated along the guide rail 40 by the drive of the motor 41.

Therefore, the conveyed object A fed onto the conveyor from the carry-in end (not shown) on the right side of FIG. moves forward by one stroke, and is stopped by the bent portion 50a of the locking plate 50 in an upright position behind it, and is conveyed toward the unloading end while being stopped from moving backward, by a stopper (not shown) provided at the unloading end. Accumulated.

In this embodiment, roller conveyor rails 31, which are transfer bodies, are provided on both sides to support the load of the conveyed object A, and the rollers 31 are also used when reciprocating below the bottom surface of the accumulated conveyed movement A. Since the rollers 32 are driven to rotate by the bottom surface, wear and the like are less likely to occur between the rollers 32 and the bottom surface, making it suitable for carrying heavy articles loaded on a pallet.

Further, in this embodiment, the conveyor rail is a roller conveyor rail 31 using rollers 32, but it may be a wheel conveyor rail using thin disc-shaped wheels.

Further, in each of the above embodiments, the accumulation shuttle conveyor is installed horizontally, but it may be installed with a slight inclination to such an extent that the conveyed objects cannot move by themselves from the carry-in end to the discharge end. The power required to transport the object can be small, and the force applied to the braking means from the object can also be small.

Furthermore, in each of the embodiments described above, the transfer body was reciprocated by a crank link connected to a motor, but other drive mechanisms such as an air cylinder or a hydraulic cylinder may also be used.

Thus, in the present invention, there is no need for special equipment to detect the accumulation state of the transported objects, and the transported objects can be automatically transported and accumulated using simple equipment. can do.

Further, according to the present invention, an accumulation conveyor can be provided which can reliably transport and accumulate objects even if the weight and size of the objects to be conveyed are not constant, and can cause less damage to the bottom surface of the objects to be conveyed.

Further, since the accumulate shuttle conveyor of the present invention does not require complicated equipment, failures are less likely to occur, and maintenance and inspection can be made easy.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional accumulate shuttle conveyor, FIG. 2 is a plan view of an embodiment of the accumulate shuttle conveyor according to the present invention, FIG. 3 is a front view thereof, and FIG. 4 is a side view of a conventional accumulate shuttle conveyor. FIG. 5 is a plan view of the support roller portion with the long flat plate omitted; FIG. 5 is a sectional view taken along line v-V in FIG. 4;
The figure is a sectional view taken along the VI-VI line in Figure 4, and Figure 7 is a cross-sectional view along the line VI-VI in Figure 4.
Figure 8 is a cross-sectional view taken along line ■-■ in Figure 7, and Figures 9, 10, and 11 are shown in Figures 2 to 8. 12 is a cross-sectional view of a main part of another embodiment of the accumulate shuttle conveyor according to the present invention;
FIG. 13 is a sectional view of a main part of still another embodiment, FIG. 14 is a plan view of still another embodiment, FIG. 15 is a front view thereof, and FIG. 16 is a guide plate of the roller conveyor rail portion. The omitted side view, Figure 17, is x vn -x■ in Figure 16.
18 is a sectional view taken along line X■-X■ in FIG. 16, FIG. 19 is a longitudinal sectional view taken along line XIX-XIX in FIG. 14, and FIG. 20 is a sectional view taken along line XIX-XIX in FIG. FIG. 21 is an enlarged side view of the main part of the locking plate. l... Accumulate shuttle conveyor, 2... Long flat plate, 3... Frame, 4... Motor, 5... Crank, 6... Link, 7... Shaft, 8... ...Support roller, 9...Support frame, 10...Shaft, If...Guide roller, 12...Shaft, 13...Support plate, 14...
Braking means, 15...locking plate, 16...shaft, 17...
・Spring, 18... Support stand, 19... Stopper, 20... Long flat plate with ribs, 21... Long flat plate with ribs, 22... Back plate, 23... Frame body, 30...
- Accumulate shuttle conveyor, 31... Roller conveyor rail, 32... Roller, 33... First support frame, 34... Shaft, 35... Second support frame, 36...
・Support roller, 37... Horizontal axis, 38... Guide roller, 39... Vertical axis, 40... Guide rail, 41
...Motor, 42...Crank, 43...Link, 44...Shaft, 45...Support stand, 46...Guide plate, 47.48...Support frame, 49... Braking means, 5
0... Locking plate, 51... Ring, 52... Shaft.

Claims (4)

[Claims] (1) A conveyor for conveying and accumulating objects to be conveyed along a conveyance path, which is provided with a conveyor on which the objects are placed and reciprocating at a constant stroke in the direction in which the conveyance path extends; An accumulation shuttle conveyor, characterized in that it is provided with braking means installed at fixed positions at regular intervals to stop the reverse movement of conveyed objects. (2) The accumulate shuttle conveyor according to claim 1, wherein the transport body is a long material. (3) The accumulate shuttle conveyor according to claim 1, wherein the transfer body is a roller or a wheel conveyor rail. (4) The accumulation shuttle conveyor according to claim 1, wherein the accumulation shuttle conveyor is slightly inclined to such an extent that the conveyed objects cannot move by themselves from the carry-in end to the discharge end. rate shuttle conveyor.