JPS6031423A - Conveyor - Google Patents

Abstract

PURPOSE:To prevent an unexpected vertical motion on an accumulation-type lift-and-carry conveyor, by mounting lifters on a moving means and providing the lifters with stoppers, which are engaged with a guide rail along a moving rail to restrict the vertical movement of the lifters. CONSTITUTION:When workpieces W held on workpiece receivers at stages S1, S2, S4, S5 are to be conveyed forwards, the lifters at the stages S1, S2 are first moved up to take the workpieces W1, W2 from the workpiece receivers by fingers and push up the workpieces. An actuator 9 is then elongated to move trucks 4 forwards on a moving rail 1 in a direction C by the length of one stage. At that time, the descent prevention rollers 24 of stoppers 21 for the lifters are engaged with the top of a guide rail 20 to prevent the workpieces W from descending due to the possible abnormality of the lifters, and the ascent prevention rollers 23 for lifters for trucks 4 at other stages are engaged with the bottom of the guide rail 20 to prevent the trucks from ascending due to the possible abnormality of the lifters.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a conveyance device, in particular, a conveyance device that repeatedly lifts up a workpiece from a fixed position, moves it horizontally, sequentially transports it to the next positioning layer, then moves back down and waits. The present invention relates to a so-called accumulation rate type lift and carry conveyor, which is designed to reliably prevent unexpected vertical movement.

[Prior art]

2. Description of the Related Art Conventional conveying devices of this type include those shown in FIGS. 1 and 2, for example. In the figure, 1 is a traveling rail supported by a support 3 erected on a base 2, and 4 is a trolley that is a traveling means that moves forward and backward on this traveling rail 1.
It is provided with a plurality of running rollers 4a that roll on the rails and guide rollers 4b that clamp the rail 1. Reference numeral 5 denotes a vertical movement actuator disposed on the traveling means 4. As shown in FIG. In the illustrated example, a fluid pressure cylinder 6 is used, and by moving the cylinder rod 6a forward and backward with working fluid sent from a fluid pressure drive source (not shown) via pressure piping, it can be attached to the tip of the rod 5a and the lid base 7 It is designed to move up and down. A finger 8 is supported on a lifter base 7 of the lifter 5.

As shown in FIG. 1, a plurality of the above-mentioned carts 4 equipped with lifters 5 that move fingers 8 up and down are connected in series on a traveling rail 1, and are driven by an actuator 9 as a forward and backward drive device. Advances (arrow mark A) and retreat (arrow mark B) between each stage S are repeated in a series.

Reference numeral 10 denotes a workpiece support (not shown in FIG. 1) installed upright on each stage S of the base 2. A workpiece W, which is an object to be transported, is normally supported by this workpiece receiver 10 for each stage,
It is placed at a fixed position at a middle level P0 higher than the finger 8 which is at its lower limit.

When the paper is transported to the next stage, the raised finger 8 pushes it up to the progressive transport position of the upper level P. Next, each truck 4 moves forward and is sequentially sent to the next stage, and this time the fingers 8 descend to be received again by the work receiver 1o located at the intermediate level. Finger 8 is
After further lowering to the lowering limit, the carriage 4 returns to the original stage position as the carriage 4 retreats.

As the fingers 8 repeatedly ascend, move forward, descend, and retreat, the workpiece W is sequentially conveyed to the subsequent stage, but the fingers 8 maintain the upper level while moving forward during conveyance, and remain at the upper level while retreating. It is necessary to ensure that the lower level is maintained.

Reference numeral 11 shown in FIG. 2 is a locking device for holding the ascending/descending position provided for this purpose. 12 is a rise/fall prevention stay attached to the lower surface of the base 7, and a plurality of through holes are bored in a line at appropriate intervals in the upper and lower longitudinal directions (not shown).

Reference numeral 13 denotes, for example, a pneumatic cylinder mounted on the truck 4, and a lock bin 14 is provided on the cylinder rond. When the finger 8 moves forward or backward, the cylinder 1
3 is actuated by air pressure sent from an unillustrated drive source via an air hose, the lock bin 14 is inserted into the through hole of the stay 12 and clicked.

However, in a conveyance device provided with such a locking device 11 for holding the ascending/descending position, the locking device 1
1 must be attached to a plurality of carts provided for each stage. This necessarily means that each quadruple
This means providing dedicated actuator drive equipment, control equipment, piping, wiring, etc. for each. This has caused the following problems. (1) Production costs increase.

(1i) Congested piping and wiring to moving parts complicates the inside of the device, resulting in poor maintainability. (ii+> For example, the air hose of the locking device is easily damaged by the movement of the movable part, and if it is damaged, it becomes impossible to lock, causing an accident such as the lowering of the lid during transportation, which may lead to damage to the transportation device or workpiece.) (1v) The operating tact of the conveyance device becomes longer due to the locking operation time required to insert and remove the lock bin 14 into the through hole of the rise/fall prevention stay 12. [Object of the Invention] This invention solves these conventional problems. [Structure of the Invention] This invention aims to solve the above problems by creating a locking device that does not use a dedicated actuator that requires piping and wiring. The invention comprises a traveling means for moving back and forth on a traveling rail, a lid disposed on the traveling means, and a finger that is supported by the gate and pushes a workpiece at a fixed position at an intermediate level to a progressive position at an upper level. In the conveying device, a guide rail is intermittently provided alongside the travel rail, and a stone i" that engages with the guide rail on the lifter to restrict vertical movement of the lift lid during travel.
This is a conveyance device characterized in that it is provided with a.k.

The present invention will be described below based on embodiments shown in the drawings.

〔Example〕

FIGS. 3 to 7 are diagrams showing one embodiment of the present invention, in which parts that are the same as or equivalent to the conventional ones are given the same reference numerals.

First, the structure will be described. Reference numeral 20 is a guide rail attached to the outer surface of the traveling rail 4, and a notch 20a is provided for each stage S so that the guide rail 20 is intermittently connected. Reference numeral 21 denotes a stopper provided on the lid base 7 of each lifter 5 to engage with the guide rail 20 and restrict the vertical movement of the lid 5 during travel. The stopper 21 illustrated in the figure consists of a stay 22 hanging down from the bottom side of the lifter base, a rise prevention roller 23 attached to this, and a descent prevention roller 2.
It is equipped with 4. The rise prevention roller 23 is attached to the lower end of the stay 22, and the fall prevention roller 24 is attached above it at a predetermined interval vertically so as to maintain the relationship described below. That is, when the stopper 5 and the fingers 8 are at the lower limit level, the rise prevention roller 23 can engage with the lower surface side of the guide rail 20, as shown in FIG. 4.

On the other hand, when the stopper 5 is raised and the finger 8 is at the upper limit level, the fall prevention roller 24 is in a relationship where it can engage with the upper surface side of the guide rail 2o, as shown in FIG.

Furthermore, this engagement relationship is automatically achieved by raising or lowering the shutter 5.

By the way, when the engagement relationship between the rollers 23, 24 and the guide rail 2o is changed in accordance with the vertical position of the lifter 5, the ν-ra crosses the guide rail.

The notch 20aLt of the guide rail 2o already mentioned is provided for that purpose, and therefore, the width of the notch needs to be large enough to allow at least both four wheels 23 and 24 to pass through.

Next, the action will be explained.

Now, for example, in Fig. 3, there is no workpiece in stage S, and the other four stages S1, St, , S4, SI+
A workpiece W is supported and held by a workpiece holder 10 at a fixed position (storage position) at a middle level, and the workpiece is sequentially transported from stage S to an empty stage S3. do.

First, select the stage S and the glue lid St and raise it. Then, the fingers 8 move up and receive the workpieces w, yv, respectively, from the workpiece receiver 1o on the way up, and push them up to the upper-level progressive position (FIG. 3). At this time, the rollers 23 and 24 serving as stoppers rise by passing through the notch 20at of the guide rail 2o (Fig. 5).
. Next, the rod of the actuator 9 for forward and backward movement is advanced, and each truck 4'lk is advanced by one step in the direction of arrow C in FIG. During this sequential feeding, the lowering prevention row 524Gi1. of the lifter with the workpiece W placed on the upper level. @6
As shown in the figure, it naturally engages with the upper surface of the guide rail 2o and rolls on that surface. Therefore, during this sequential transfer,
Even if the fluid pressure in the starter 5 were to drop, the workpiece W2 would not drop. In addition, each of the carts in stages S4 and S moves forward with the lifter 5 at the lower limit position (the state shown in FIG. 4 or FIG. 7), but the rise prevention roller 23 of the stopper 21 It engages with the lower surface of the guide rail 20 and transfers. Therefore, it is possible to prevent the danger of the workpiece 5 suddenly rising while the cart is moving and, for example, pushing up the workpiece in the storage position with the fingers 8 and damaging it.

Thus, when each trolley reaches the next stage, forward movement stops, and then the workpiece W-W! or the lid lowers to the lower limit. The rollers 23, 24 of the stop pass through the recess 20a of the guide rail.

On the way, the workpiece W is received by the workpiece receiver 10 of the stages S, , S, and stored.

Thereafter, the actuator 9 is reversely operated to move each cart 4 back to its original stage while remaining at the lower limit position of the lifter. "Double successive workpiece transport can be carried out by selecting the cart lid of any stage according to the storage condition of the work. Of course, it is also possible to transport all the cart lids by raising them at once. It is possible.

In addition, each of the four rollers 23, 24e for preventing rising and falling in the above embodiment may be made of a sliding shoe, for example.

〔Effect of the invention〕

As explained above, according to the present invention, an intermittent guide rail is provided along with the running rail of the conveyance device, and a stopper for preventing rise and fall that engages with this guide rail is provided on the lid. Because of this structure, it is inexpensive and there is no risk of failure. In addition, it is possible to completely prevent unexpected accidents during transportation, and moreover, no special locking work time is required, and high reliability and high efficiency can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional conveying device, FIG. 2 is a front view, FIGS. 3 to 7 show an embodiment of the present invention, FIG. 3 is a side view, and FIG. 4 is a front view. Figure, Figure 5 (a) Side view of the main part when the beam lid is rising or falling, Figure 5 (b)
Figure 6(a) is a side view of the main part when the beam 7 is at its upper limit and is running, Figure 6(b) is a view taken from the arrow bb in Figure 6(a). bb arrow view, Figure 7 (a) is a side view of the main part when the beam 7 is at its lowering limit and is traveling, Figure 7 (b) is the same figure (
It is a bb arrow view of a). 1......Travel rail. 4...... Traveling means 5... Lifter 8... Finger 20... Guide rail 21.・・・・・・・・・Stopper

Claims (1)

[Claims] It is equipped with a traveling means for moving back and forth on a traveling rail, a lid disposed on the traveling means, and a finger supported by the lifter and pushing up a workpiece at a fixed position at an intermediate level to a progressive position at an upper level. In the conveyance device, a guide rail is provided intermittently on the traveling rail, and the above-mentioned 7
1. A conveyance device comprising a stopper that engages with the guide rail and restricts vertical movement of the lid during travel.