JPS63202519A - Lifting mechanism of linear motor type conveying device - Google Patents

Abstract

PURPOSE:To improve conveying efficiency as well as safety by providing driving body in parallel with a lifting rail over the whole length of said rail and providing a means of engaging with both of said driving body and a bogie in the lifting mechanism of a one-side type linear motor conveying device. CONSTITUTION:A chain 28 is made travel counterclockwise at a defined speed. On the other hand, a feeding voltage to a primary side is regulated in such a way that a carrier C which is conveyed by a horizontal rail is decelerated at a curve part on the lower side of a vertical rail 11 and that, after being translocated to the vertical rail 11, its speed becomes gradually lower than the speed of the chain 16. While the speed of the carrier C is higher than the speed of the chain 16, the board 13 of the carrier C is lifted up while collapsing the engaging pieces 17 of the chain 16. When its speed is lowered, the engaging recessed parts 14 of the board 13 are engaged with the engaging pieces 17 and the board 13 is lifted up together with the chain 16 being supported by the engaging pieces 17. Accordingly, the lifting can be smoothly carried out improving conveying efficiency while preventing falling down.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a linear motor type conveyance device that conveys articles along three-dimensionally arranged conveyance rails, and which is particularly provided at a location where articles are raised and lowered. This invention relates to an elevating mechanism of a linear motor type conveyance device.

[Prior Art] Recently, in buildings such as department stores and banks, single-sided linear vehicles have been used to transport various goods not only within one floor, but also between floors. 2. Description of the Related Art Conveying devices using an induction motor (hereinafter abbreviated as LIM) as a driving source have been introduced.

This LIM type transport device forms a three-dimensional travel path using horizontal, vertical, curved, etc. rails, and runs a carrier (truck) for transporting articles along these rails.
The primary side of LIM is responsible for generating the traveling magnetic field on the rail, and the secondary side conductor is placed on the carrier, and vice versa, the primary side is placed on the rail and the primary side is placed on the carrier. There is a type that runs on the side. Then, by supplying current to the primary side and adjusting the voltage of this supplied current, the carriers are transported along the rails.

In such a device, the part for vertically conveying the carrier usually consists of vertical rails 2 continuously connected to upper and lower horizontal rails 1, as shown in FIG.
2, a carrier C on which an object W to be transported is fixed is raised and lowered. In this case, the primary side M of the LIM is placed on each rail 1, 2, and the secondary side conductor (not visible in the figure) is placed on the carrier C, which is the so-called secondary side running type. In order to secure the thrust force to raise the carrier C, a large number of primary sides M1 of the LIMs are arranged at narrower intervals than the horizontal rails 1.

In addition, as a mechanism for vertically conveying the carrier C, as shown in FIG. A short rail 4 to which one primary side M1 of the LIM is fixed is horizontally fixed to the platform 3, and the carrier C is raised and lowered together with the lifting platform 3.

According to this, for example, in order to raise the carrier C from the lower rail l to the upper rail l, the lifting platform 3 is moved to align the short rail 4 with the end of the lower rail l, and then the carrier Move C to short rail 4 and stop U゛,
Next, raise the lifting platform 3 and move the short rail 4 to the upper rail I.
This is done by aligning the end of the carrier C to the upper rail l. In addition, in order to lower the carrier C from the upper rail l to the lower rail l, this procedure may be reversed.

[Problems to be Solved by the Invention] By the way, according to these lifting and lowering mechanisms, in the former case, since each rail 1.2 is continuous, it is possible to smoothly lift and lower the carrier C without stopping it. However, in order to secure the thrust to raise the carrier C, it is necessary to arrange a large number of LIMs (primary side) on the elevating rail 2, resulting in an expensive problem. Furthermore, even in the case of the primary side traveling type in which the carrier C is provided with the primary side of the LIM, there is a limit to the thrust force, and if the vertical rail is long, it may not be possible to transport heavy objects. Furthermore, regardless of whether the carrier is running on the primary or secondary side, the carrier will fall if there is a power outage, so a means to prevent the carrier from falling is required.

In the latter case, since the carrier C is temporarily stopped on the lifting platform 3, there is a loss of time due to deceleration and stopping, resulting in poor conveyance efficiency.Furthermore, the position of the carrier C may shift due to vibrations that occur when the lifting platform 3 moves. There was a risk of it getting lost. moreover,
Another problem is that it is difficult to accurately control the alignment of the short rail 4 with respect to the upper and lower horizontal rails 1.

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems. In the elevating mechanism of a linear motor type transport device, which moves the transport vehicle up and down along the elevating rail and transfers the transport vehicle to the surface transport rail, an engaging portion is provided on the side of the transport vehicle. A driving body is provided on the side of the lifting rail on which the engagement portion of the lifting truck is provided, and a driving body that moves parallel to the rail along approximately the entire length of the lifting rail. The present invention is characterized in that an engaged portion that engages with the engaging portion of the truck to support the truck is provided on the surface of the driver that faces the lifting rail.

[Function] When the transport vehicle that has been self-propelled on the transport rail by the drive of the linear motor is transferred to the elevator rail, the transport vehicle engages with the engaged portion of the driver, so that the transport vehicle The engaging portion of the conveying cart and the engaged portion of the driving body engage with each other at the stage of being supported by the driving body, moving up and down the elevator rail as the driving body moves, and then being transferred to the conveying rail. is removed, and the carriage is driven by a linear motor installed on the carriage rail and moves on its own.

[Embodiment 1] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In these figures, components common to those in FIG. 5 are given the same reference numerals.

Fig. 1 shows the vertical conveyance section in the linear motor type conveyance device, and the symbol 1O indicates the horizontal rails (
11 is a vertical rail (elevating rail) continuously connected between these horizontal rails 10, MI
C is the primary side of the LIM fixed to each rail l0111, and C is a carrier to which an object W to be transported is fixed and is transported along each rail l01It.

The primary side M of L I M is arranged at a certain distance from the upper and lower horizontal rails 10, and furthermore, near the curve where the horizontal rail IO transitions to the vertical rail 11, there is a In comparison, they are arranged in large numbers at narrower intervals, and are not arranged in the middle of the vertical rail 11. The reason why a large number of primary sides are arranged in the curved part is to enable the speed adjustment of the carrier C traveling in this part.

The carrier C has a U-shaped cross section as shown in FIG.
2 is provided, and each rail l01I is provided on the inner surface.
A secondary ring body Mt of the LIM is fixed so as to face the primary side M1 of the LIM disposed at f with a distance therebetween.

The side surface of this carrier C on which the transported object W is not fixed;
That is, as shown in FIG. 2, a plate I3 is fixed to the left side of the vertical rail 11 when moving up and down in FIG. The engagement recess 14 is continuously formed. The engagement recess 14 has an upper edge that slightly protrudes downward, a lower edge that slopes gently downward, and an opening direction that faces obliquely downward, and is formed in a wave shape when viewed as a whole.

As shown in FIG. 1, behind each of the rails 10111, a frame 15 is fixed to a wall (not shown), etc., and a chain 16, which is a driving body for raising and lowering the carrier, is provided on this frame 15. ing. This chain 16 is located on the left side of the vertical rail 11 in FIG.
It is arranged parallel to the vertical rail 11 at a slight distance from the vertical rail 11, and is rotated in any direction by a drive device (not shown).

As shown in FIG. 2, this chain 16 includes:
A large number of engagement pieces 17 are attached at regular intervals around the entire circumference of the chain 16 to engage with the engagement recesses 14 provided on the carrier C side to support the carrier C.

As shown in FIG. 4, this engaging piece 17 has a substantially triangular shape when viewed from the side, and a roller 18 is rotatably attached to the corner portion facing diagonally upward, and a rotation preventing member is provided at the lower end. claw 1
9 is formed, and is pinned to an engaging piece holding portion 20a formed on the outside of each link 20 constituting the chain 16. This engaging piece 17 is normally moved by a coiled spring 21 attached to the inside as shown by the arrow (A) in FIG.
Although the claw 19 is biased in the direction, the claw 19 protrudes from the lower end.
hits the holding portion 20a and is prevented from rotating. When pushed toward the chain 16 as shown by the arrow (b), it rotates against the coiled spring 21, and when this force is removed, it returns to its normal position.

Note that, as shown in FIG. 2, the mutual spacing between the engagement pieces 17 is such that they correspond to every other engagement recess 14 provided on the carrier C side, and further, The distance between the chain 16 and the vertical rail it is set such that the engagement piece 17 on the chain 16 side is firmly fitted deep into the engagement recess 14 on the carrier C side.

Next, the operation of raising and lowering the carrier C on which the transported object W is fixed along the vertical rail 11 using this apparatus configured as described above will be explained.

First, when transferring the carrier C from the lower horizontal rail IO to the upper horizontal rail 10, that is, when raising the carrier C, first move the chain 16 counterclockwise in FIG. 1, that is, in the upward direction of the carrier C. Keep it rotating at a specified speed.

Next, move the carrier C that has been traveling on the horizontal rail 10 to the vertical rail! The supply voltage to the primary side of the LIM is adjusted so that it is decelerated at the lower curve part where it transitions to LIM, and then gradually becomes slower than the moving speed of the chain 16 after passing through the curve and moving to the vertical rail 11. .

After the carrier C moves to the vertical rail 11, while its running speed is faster than the moving speed of the chain I6, the plate 13 on the side of the carrier C moves up while knocking down the engagement piece I7 on the chain 16 side, and when it slows down, the carrier C-side engagement recess 14
The engagement piece 17 on the chain 16 side is fitted into the chain 16 side. and,
As the chain 16 moves, the carrier C moves to the engagement piece! Vertical rail while being supported by 7! It is lifted along the l.

Then, when approaching the upper curve, if a thrust is applied to the primary side of the LIM in this part to raise the carrier C at a speed faster than the moving speed of the chain 16, the carrier C side and the chain side The carrier C is disengaged from the carrier C, and the carrier C runs by itself, passes through the curve, enters the upper horizontal rail 10, and runs.

Next, when the carrier C is transferred from the upper horizontal rail 10 to the lower horizontal rail IO, that is, when it is lowered, the chain 16 is moved clockwise in FIG. 1, that is, in the downward direction of the carrier, at a constant speed. When the carrier C, which has been running on the upper horizontal rail IO, passes through the upper curve and moves to the vertical rail 11, its speed is lower than the moving speed of the chain 16 while receiving thrust. Adjust it to be slower.

During this time, the engagement piece 17 on the chain 16 side does not fit into the engagement recess 4 on the carrier C side, but
When passing through the primary side M of M, the thrust on the carrier C is released, and at the same time, the carrier C falls slightly and the engagement recess 14 on the carrier C side fits into the engagement piece 17 on the chain 16 side. The carrier C is now supported by the engagement piece 17. And then chain I6
At the same time, the carrier C descends, and when turning the lower curve, the engagement recess 14 on the carrier C side and the engagement piece 17 on the chain 16 side are naturally disengaged, and at this point, LIM 1
If a current is supplied to the next side M, the carrier C will run on the lower horizontal rail lO.

In the above manner, the carrier C is connected to the upper and lower horizontal rails 1
According to this device, the vertical rail 11 for lifting and lowering is continuously connected to the upper and lower horizontal rails 1O, and also when moving to the lifting stage using the chain 16. Since the carrier C does not need to be stopped and its operation is natural, it can be raised and lowered smoothly without any loss of time.

In addition, since the engagement recess 14 on the carrier C side engages with the engagement piece 17 on the chain IG side, even heavy objects can be moved up and down reliably. Even if L[M has a power outage, the carrier C will not fall from the vertical rail 11, and the chain 16
Even if the side drive device loses power, the drive shaft of this chain 16 is equipped with a reverse rotation prevention function, so that the carrier C
will not fall from the vertical rail 11, ensuring safety.

Furthermore, in the case of the secondary side traveling type as in this embodiment, there is no need to arrange a large number of primary sides M on the vertical rail 11 in order to secure the thrust to raise the carrier C, and the cost is reduced. It also has the advantage of being able to reduce

Note that this device can be used not only for secondary side traveling type LIM as in the above embodiment, but also for secondary side traveling type LI
This can also be applied to M.

Further, in this embodiment, the engagement recess 14 is formed on the carrier C side, and the engagement piece 17 that engages with the engagement recess 14 is provided on the chain 16 side, or the reverse may of course be used.
Further, as the driving body for lifting and lowering the carrier C, any type of driving body may be used as long as it moves along the lifting rail 11 like the chain in this embodiment.

[Effects of the Invention] As explained above, according to the elevating mechanism of the linear motor type conveyance device of the present invention, the engaging portion is provided on the side of the conveyance cart,
The driving body, which is disposed to move parallel to the rail along almost the entire length of the lifting rail, is provided with a corrugated part that engages with the engaging part of the cart and supports the cart, so that the transportation is easy. The trolley that has moved from the storage rail to the lifting rail is supported by the driving body by its engaging portion engaging with the mating portion of the driving body, and is moved up and down the lifting rail as the driving body moves. becomes.

Therefore, the cart can be smoothly raised and lowered without stopping when moving to the lifting rail, so there is almost no time loss and the transport efficiency is increased. In addition, by engaging with and being supported by the drive body, the trolley can reliably lift and lower even heavy objects. There is no risk of this happening and safety is ensured.

In addition, in the case of a linear motor transport device with a secondary side running type, there is no need to connect the primary sides of many linear motors to the lifting rail in order to secure the thrust of the transport vehicle, resulting in cost reduction. It becomes possible to aim for.

[Brief explanation of the drawing]

1 to 4 are views showing one embodiment of the present invention, in which FIG. 1 is a side view showing the whole, FIG. 2 is an enlarged side view of main parts, and FIG. Fig. 4 is an exploded perspective view of the chain link and engagement piece, Fig. 5 is a side view showing a conventional elevating mechanism, and Fig. 6 is another conventional elevating mechanism. FIG. lO...Horizontal rail (transport rail), 11.
... Vertical rail (rail for lifting/lowering), 14...
...Engagement recess (engagement part), 16...Chain (
(driver), 17... engaging piece (engaged part).

Claims (1)

[Claims] A lifting rail is placed between the transport rails arranged above and below the linear motor type transport device, and a transport vehicle is raised and lowered along this elevator rail, and the transport vehicle is transferred to the transport rail. In the elevating mechanism of a linear motor type conveyance device, an engaging portion is provided on a side of the conveying cart, and an elevating portion is provided on a side of the elevating rail on which the engaging portion of the elevating cart is provided. A driving body that moves parallel to the rail along approximately the entire length of the rail is disposed, and a driving body that moves parallel to the rail is provided on a surface of the driving body that faces the lifting rail, and engages with an engaging portion of the truck to move the truck. 1. An elevating mechanism for a linear motor type conveyance device, characterized in that an engaged part is provided to support the elevating mechanism.