JPH0398909A - Transfer device - Google Patents

Abstract

PURPOSE:To obtain easy and sure vertical-positioning in a transfer device consisting of a carrying conveyor and a carriage by providing the carriage with a vertical-positioning member and adjusting the vertical position of the member in the vicinity of a carrying conveyor so that the position comes within a prescribed range together with starting the driving of a carrying power source only after a detection signal confirming the positioning has been issued. CONSTITUTION:A set screw 45 of a carriage 3 is loosen, a whirl stop 43 is moved upward, and a handle 22 is rotated. At this time, since a base bed 16 moves vertically with respect to a pedestal 38, the height of a positioning pin 23 varies. When the pin 23 interrupts the ray from a projector 53, a receiving conveyor 48 starts its operation. In this state, rotation of the handle is stopped, the whirl stop 43 is lowered, and the handle 22 is fixed by a set screw 46. At the same time, the positioning pin 23 releases a stopper of a rack 1, thereby sending the rack 1 onto the receiving conveyor 48, which has started its driving. With this contrivance, the vertical position of a carriage can be mated easily and surely.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention relates to a transport conveyor that transports an object, and a transport conveyor that transports the object. The present invention relates to a transport device consisting of a cart on which transfer is performed.

(b) Conventional technology When transferring objects from a trolley to a conventional conveyor,
Alternatively, when transferring objects from a trolley to a transport conveyor, in order to ensure that the transported objects are transferred smoothly, it is necessary to use markers, etc. The operator was able to visually adjust the distance by looking at the image, and then press a switch that rotated the conveyor to start conveyance. (c) Problems to be Solved by the Invention However, in the prior art described above, it is difficult to ensure alignment, and it is also troublesome to press a switch to enable transport.

Accordingly, an object of the present invention is to reliably perform alignment in the height direction and to reduce the labor of the operator.

(2) Means for Solving the Problems For this reason, the present invention provides an object for transporting an object onto which the object is placed and transferred from a trolley whose height of the surface on which the object is placed can be adjusted by a height adjustment mechanism. In a conveyance device that conveys a conveyed object by a conveyor driven by a conveyance drive source, a positioning member is attached to the cart so that the height can be adjusted along with the height of the placement surface by the height adjustment mechanism. a detection means for detecting the presence of the alignment member if the alignment member is within a predetermined height range when the cart approaches the conveyor; and a control means for controlling the transportation drive source to be able to start driving when the presence of the alignment member is detected after the height adjustment by the height adjustment mechanism. The present invention also provides a conveyor that is driven by a conveyance drive source and conveys an object stopped at a stop station;
In a conveyance device comprising a trolley, the height of a loading surface of the conveyed object on which the conveyed object is placed and transported is adjusted by a height adjustment mechanism, a positioning member mounted so that its height can be adjusted along with the height of the placement surface by a height adjustment mechanism, and when the positioning member is within a predetermined height range when the trolley approaches the conveyor; a detection means for detecting the presence of the alignment member, and when the detection means detects the absence of the alignment member and detects the presence of the alignment member after height adjustment by the height adjustment mechanism; and control means for controlling the transport drive source so that driving can be started.

(f) Effect If the detection means detects the absence of the alignment member even when the trolley approaches the conveyor, the height adjustment mechanism adjusts the height of the alignment member. When the detection means detects the presence of the alignment member by adjusting the height of the alignment member, the control means can start driving the conveyance drive source.

〈〈〉Embodiment〉In Fig. 1, (1) is a magazine rack that stores a printed circuit board (2), and (3) is a magazine rack that stores the printed circuit board (2).
This is a trolley that transports 1〉. (4) is a magazine rack (
This is a board supply device that supplies the printed circuit board (2) stored in 1) to downstream equipment. Next, the substrate supply device (4) will be explained. As shown in Fig. 2, the substrate supply device (4) is a rack receiving conveyor section (5) that receives the magazine rack (1) from the cart (3).
, a rack discharge conveyor section (6) that discharges the magazine rack (1) onto the trolley (3), and a rack discharge conveyor section (6) that discharges the magazine rack (1) onto the cart (3);
1) and supplies the printed circuit board (2) to the downstream equipment, the elevator section (7) transfers the magazine rack <1> from the rack receiving conveyor section <5> to the elevator section (7), and the elevator section ( 7) a rack transfer unit (1) for transferring the rack (1) from the rack discharge conveyor unit (6);
8).

The receiving conveyor section (5) includes an LS1 sensor (9) that detects whether the cart 3) is placed in the correct position, and an LS2 sensor that detects the presence or absence of a rack (1) in the middle of the receiving conveyor section (5). (10) is provided. The elevator section (7) is equipped with an LS3 sensor (
11) is provided.

The discharge conveyor section (6) has an LS that detects the presence or absence of the rack (1) at the stop station of the discharge conveyor section (6>).
4 sensors (12) and the trolley (3) are connected to the discharge conveyor section (6
) is provided with an LS5 sensor (13) which detects whether it is in the correct position to receive the rack (1>).

Next, the truck <3> will be explained based on FIG.

(15) is the rack (1) provided on the base (16).
) is placed on the conveyor so that it can be conveyed, and is composed of a large number of free rollers (17) that are rotatably arranged in series and are pivotally supported by a base (16) in the direction of rotation.
18) is a conveyor guide that guides the rack (1) being conveyed on the free roller conveyor (15). (
19) is a fixed stopper that locks onto the rack (1) moving on the conveyor (15) to restrict movement;
It is fixedly installed on the base (16).

(20> is a movable stopper, levers (21) and (7)
When transferring the rack (1) to the trolley (3) or discharging the rack (1) from the trolley (3) by operation, it is knocked down and the rack (1) is placed on the Funo roller conveyor (15). The conveyor height (22) adjusts the height of the free roller conveyor (15) by adjusting the height of the base (16). Adjustable handle.

(23> is a positioning pin attached to the base (16) so that it can move forward or backward. It can be moved forward or backward by operating the lever (21), and the height position is determined by the height of the base (16>). The protruding length of the pin (23) is always the same.Next, the drive mechanism of the movable stopper (20) and the alignment pin (23) by the lever (21) will be explained based on FIGS. 3 and 4. explain.

The lever <21> can swing around a lever support shaft <25> fixed to the base (16>), and the engagement pin (26 ) is provided with an engagement groove (27>) in which the lever (21
) is pulled forward, the alignment pin (23) is guided by the bearings (28) (28) fixed to the base (16〉) and moves forward to protrude from the front of the trolley (3). Vertically long movable stopper (20) is rotatable around the support shaft (29>), and is supported by a spring (30>).
9) It is biased in the direction of falling down at a lower position, and is prevented from falling down when it is locked by the stop collar receiver (31). Stopper receiver (31
) is guided by the guide member (32), and the alignment pin (23
) can be moved parallel to the direction of movement. Stopper receiver (
An engagement piece (34>) is formed at one end of the alignment pin (23), and when the alignment pin (23) moves forward, it moves forward by being pressed by a forward pressing piece (35>) provided on the pin (23). When the bottle (23>) is retracted, it is pressed by the retraction pressing piece (36) and retreats. Figure 4 shows the stopper receiver (3l) in a retracted state, and the stopper receiver (31) is attached to the movable stopper member (20).
) to prevent the stopper (20) from falling.

As the alignment pin (23) moves forward, the stopper receiver (31) also moves forward, and the movable stopper (20) moves towards the tapered part (
While its upper part is locked to 37〉, it rotates under the biasing force of spring 30〉 and falls down below the conveyance surface of rack (1〉). Base (9) by conveyor height adjustment handle (22) The mechanism for adjusting the height of the handle (22) will be described based on Figs. 3 and 4. A screw is carved in the lower part of the handle (22), and a pedestal (38 ) is fitted.The base (16) is fixed in the vertical direction to the portion of the handle <22> where no screws are carved and is fitted so that it can only rotate.Plinth (38) In addition, three screw shafts (39) (39) (39) are fitted in the parts where the screws are carved, and each of the screw shafts (39) (
39) (39) is fitted in a portion where no screws are provided, which are fixed in the vertical direction and can only be rotated. The lower part of the handle (22) and each screw shaft (39) (39)
) (The height position of the pedestal (38) from the floor is constant, and by rotating the handle (22), the base (16> and the pedestal (38) can be brought into contact and separated). stand (1
6) The height position changes. (43〉 is a rotation stopper,
It is fixed to the hand pusher (44) attached to the pedestal (38) with a set screw (45), and the handle (2
2) It is laterally engaged with the handle bin (46) which is installed upright to prevent the handle (22) from rotating in the downward direction.

No matter the height of the base (16), the rotation stopper (43) is 7
) to lock onto the lock bin (46).
> can be changed in height by loosening the screw (45), and the handle bin (46) also has a certain length.

Next, the magazine receiving conveyor section (5) will be explained.

〈48〉 is a pair of receiving conveyors that transport the magazine racks (1) delivered from the cart (3), and are driven by a receiving conveyor motor (49). (50) (50)
are a pair of receiving free rollers that freely rotate in the conveying direction of the conveyor (48), and the conveyor (48).
! : The rack (1) which is pivoted at the same height position and received from the trolley (3) is placed thereon, and the transfer of the rack (1) to the conveyor (48) is relayed. The Ls1 sensor (9) detects the presence or absence of the alignment pin (23) inserted from the pin insertion opening (52>), and includes a light emitter (53) that emits a light beam and a light receiver (54) that receives the light beam.
), the receiver (54) receives the light beam emitted by the light emitter (53), detects the absence of the bin (23), and directs the light beam emitted by the light emitter (53) to the pin (
The presence of the pin (23) is detected by blocking the pin (23). The light beam emitted by the light projector (53) is directed horizontally at a predetermined height distance below the height position of the receiving free roller (50) and the receiving conveyor (48>).
) is transmitted in a direction perpendicular to the transport direction.

The height difference between the bin (23) and the conveyor (15) is also the same as the predetermined height distance described above, and the pin (
23) is detected by the sensor (9>),
The height of the free roller conveyor (15) will match the height of the receiving free roller (50>) and the receiving conveyor (48>).

The pin insertion opening (52) has a predetermined width, and when the bin (23>) is inserted, the cart (3) is within the permissible lateral displacement limit with respect to the receiving conveyor (48). It will be located.

The length of the bin (23) is such that even when the sensor (9> is shielded from light by the tip of the bin (23), the receiving free roller (50) and the cart (3 The distance between the roller (50) and the roller (17) is set to a predetermined distance so that the rack (1) does not tilt due to the position of the center of gravity between the free roller (17) at the top of the entrance. In order to ensure that the distance is within the predetermined length, the length is set to be below a predetermined length.
3), the sensor (9>) is connected to the pin (23).
No matter which part of the rack (1) is blocked from light, the distance between the free roller (17) and the receiving free roller (50) is such that the rack (1) does not tilt during delivery.

That is, since the bin (23) is in a state where it is detected by the sensor (9), the positions of the cart (3) and the magazine receiving conveyor section (5) are such that the rack (1) can be delivered. It will be in a certain position.

The LS2 sensor (10) detects the presence or absence of the rack (1) after being conveyed to the receiving conveyor (48), and when the sensor (10> detects the presence of the rack (1)), the receiving conveyor The motor (49) is stopped and the receiving conveyor (48) stops transporting the rack (1).

Next, the rack discharge conveyor section (6) will be explained. (55) is a discharge conveyor rotated by a discharge conveyor motor (56) which discharges the rack (1) to deliver it to the cart (3), and (57> relays the discharge of the rack (1). This is a free discharge roller.

The LS5 sensor (13) consists of a light emitter (58) and a light receiver (59) similar to the LS1 sensor (9), and detects the presence or absence of the pin (23) inserted from the pin insertion opening (60).
It is detected in the same manner as the S1 sensor (9).

In FIG. 5, (62) is a CPU, which controls operations related to the supply of printed circuit boards <2> according to the flowcharts shown in FIGS. 6 to 14. (63
) is an interface. (64) is a discharge conveyor motor drive unit that drives the discharge conveyor motor (56), and (65) is a receiving conveyor motor drive unit that drives the receiving conveyor motor (49).

(66) is a rack elevator transfer drive unit that drives the rack transfer unit (8) to transfer the rack (1) from the receiving conveyor (48) to the elevator unit (7); (67)
is a rack conveyor transfer drive unit that drives the rack transfer unit (8) to transfer the rack (1) from the elevator unit (7) to the discharge conveyor (55). (68) is a start button for starting the substrate supply device (4). (69) is M
It is an LSI-2 memory, and after the LSI sensor (9) is turned on, the rack (1) is moved from the cart (3) to the receiving conveyor (
48) and is being moved to a position where the LS2 sensor (10) is turned on, "1" is stored, otherwise "0" is stored.

(70) is the MLS2-3 memory, and the LS2 sensor (
LS3 sensor <11> turns O from the position where 10) turns ON.
"1" if rack (1) is moving to position N
otherwise, "0" is stored. (71
) is MLS3-4 memory, and LS3 sensor (11)
If the rack (1>) is moving from the position where is ON to the position where LS4 sensor (12) is ON, store "11", otherwise store "0." (72) is MLS4 -5 memory, and the rack (1) is moved from the position where the LS4 sensor (12) is turned on to the discharge conveyor (55).
The LS5 sensor (13) is transferred to the trolley (3).
``IJ'' is stored until OFF, otherwise ``0'' is stored.

The operation will be explained below based on the above structure.

First, when the operator presses the start button (68>), all memories (69), (70), (71), and (72) are reset and "0" is stored.At first, the magazine is stored in the board supply device (4). Assuming that the rack (1) is not supplied, the operator must select the rack (1) in which the printed circuit board (2) is stored.
) is placed on a cart (3) and transported, and the cart (3) is positioned in front of the rack receiving conveyor section (5>).

At this time, the movable stopper <20> protrudes upward, and the rack (1) is placed on the free roller (17) between the fixed stopper (19) and the movable stopper (20>. , when the operator pulls the lever <21> toward the user, the lever (21) rotates about the lever support shaft (25), and the positioning pin <23> aligns with the engagement pin (26>) and the engagement groove (
27), is guided to the bearings (28) (28), protrudes forward, and is inserted into the pin insertion opening <52>. Pin insertion hole (
52) If the position of the alignment pin (23) is shifted laterally and cannot be inserted, move the cart (3) laterally to a position where the bottle (23) can be inserted and correct it.

Then, the alignment pin (23) blocks the light beam projected by the light projector (53>), and the LS1 sensor (9) detects the alignment pin (23) and turns ON.

At this time, LS5 sensor (13), LS4 sensor (12)
), LS3 sensor (11), and LS2 sensor 10) are not ON, the CPU (62) causes the receiving conveyor motor (65) to operate the receiving conveyor motor ( 56), the conveyor (48) starts moving, and the MLSI-
2 memory (69) stores "11". If the receiving conveyor (48) does not start moving even after the alignment bin (23) is inserted, move the cart (3>) to the rack receiving conveyor section (
5) If the bin (23) is too far away to reach the bin (23), move the trolley (3> closer to the rack receiving conveyor section (5>). This is because the height of the conveyor height adjustment handle (22) is not correct.
6), that is, the height of the alignment pin (23) is adjusted.

The operation of adjusting the height of this base (16>) will be explained.

By loosening the set screw (45), moving the detent (43) upward, and then turning the adjustment handle (22),
The handle (22>) moves up and down with respect to the base (38).

At the same time, the screw shafts (39) (39) (39) rotate through the gear (40) and chain (41), and the screw shafts (39) (39) (39) also rotate in the same manner as the handle (22). Move up and down by the distance. Therefore, the base (16>) moves up and down with respect to the pedestal (38), and the height of the alignment pin (23>) is also changed.When the bin (23) blocks the light beam projected by the light projector (53>), As the receiving conveyor (48) starts moving,
At this position, stop rotating the handle (22), lower the rotation stopper (43>), and fix it with the setscrew (45>) to prevent the handle (22) from turning.

When the alignment pin (23) is protruded, the forward pressing piece (3)
5>, the stop collar receiver (31) is pressed and guided by the guide member (32) to move forward. Then the taper part (37)
The movable stop collar (20) is locked while the spring (30)
The stopper spindle (29) is rotated by the biasing force of the stopper support shaft (29), and when the alignment bin (23) is completely projected, it falls down below the position where it is locked to the rack (1).

After confirming that the receiving conveyor (48) has started moving, the operator places the rack (1) on the cart (3) on the free roller conveyor (15), moves it along the conveyor guide (18), and starts the receiving conveyor. It is transferred onto the receiving conveyor (48) via the free roller (50>).Then, the receiving conveyor (
48) starts transporting the rack (1). After the operator finishes transferring the rack (1) onto the conveyor (48), the operator moves the cart (3) and turns off the LS1 sensor (9).

After that, when the rack (1) is conveyed to the receiving conveyor (48), the LS2 sensor (10) detects the rack (1) and turns ON. According to the flowchart, since the LS3 sensor (11) is not ON, the MLSI-2 memory (69) becomes "0", and the conveyance continues, and the rack elevator transfer drive unit (66) is driven and the MLS2-3 memory (69) is set to "0". 70>, “1,” is stored.

After that, the rack (1) is transferred from the receiving conveyor (48) to the elevator section (7) by the rack elevator transfer drive section (66).
The rack is transferred via the rack transfer unit 8) driven by
The S3 sensor (11) is turned on. At this time, MLS2-
3 memory (70) is "r1", so in Figures 6 and 1
According to the flowchart in Figure 0, the rack elevator transfer drive unit (66) stops driving and the receiving conveyor motor (49)
stops rotating, and the MLS2-3 memory (70〉HO RES
ET and becomes "rO". Then, the printed circuit board (2) in the rack (1) is supplied to a downstream device (not shown) of the board supply device (4) by a supply means (not shown). Since there is no rack (1) on the receiving conveyor (48), the operator moves the next rack (1) containing the board (2) to the trolley (3).
The cart (3) is stopped in front of the receiving conveyor section (5).

In the same manner as described above, pull the lever (21) to insert the alignment bottle <23> into the bottle insertion opening (52) and turn on the LS1 sensor (9).At this time, the LS3 sensor (11)
) is ON, the rack (1) is not yet empty and the LS2 sensor (10) and LS4 sensor (
12) and the LS5 sensor (13) are OFF, and each memory is all "0". Therefore, Figures 6 and 7
According to the flowchart in the figure, the receiving conveyor motor (56)
starts rotating, and the MLSI-2 memory (69>
J is stored. After the operator transfers the rack (1) to the receiving conveyor (48), the operator transfers the trolley (3) to the substrate supply device (4).
> Release the lever (21) or return the positioning pin (23)
) and set the LS1 sensor <9) to 0FF.

Thereafter, when the rack (1) is conveyed to the receiving conveyor (48), the LS2 sensor (10) detects the rack (1) and turns ON. When the LS2 sensor (10) turns on, the CPU (62) turns on the LS3 sensor (11).
Since it is N, the rotation of the receiving conveyor motor (49) is stopped according to the flowcharts in FIGS. 6 and 7, and the MLSI-2 memory (69) is reset to "0".
”.

The printed circuit board (2) is being supplied from the rack (1) in the elevator section (7), and the LS3 sensor (11) is ON.
During this period, the LS2 sensor (10) on the conveyor (48) is
The rack (1) is stopped at the N position, but the printed circuit board (2) is removed from the rack (1) of the elevator section (7).
When the supply is exhausted and becomes empty, the LS3 sensor (11) is ON, the MLS2-3 memory (70) is "0", the LS4 sensor (12) is OFF, and the MLS3-4 memory (71) is "10". The rack (1) is discharged from the elevator section (7) according to the flowcharts in FIGS. 6 and 11.

This discharge operation first starts with the rack conveyor transfer drive unit <67
>, the rack transfer unit (8) is driven to transfer the rack (1) to the discharge conveyor (55>).
(62) stores "11" in the MLS3-4 memory (71) and drives the discharge conveyor motor drive section (64>) to rotate the discharge conveyor motor (56>).

In this way, the rack (1) of the elevator section (7) is transferred to the discharge conveyor (55) by the rack transfer section (8) and conveyed by the discharge conveyor (55>), and the LS4 sensor (12) is then transferred to the rack (1) by the rack transfer section (8). ) is detected and reaches the position where it turns ON.

When the LS4 sensor (12) is turned on, the discharge operation stops according to the flowcharts of FIGS. 6 and 12 since the MLS3-4 memory (71> is "r1"). That is,
The rack conveyor transfer drive unit (67) is connected to the rack transfer unit (8
) is stopped, the rotation of the discharge conveyor motor (56) is stopped, and the MLS3-4 memo (71) is set to RESET.
10".

Here, the LS2 sensor (10) is ON, and the MLS1-
2 memory (69) is “0,, LS3 sensor (11>?
FF,MLS3-4,,lmolJ(71)'0,
, the MLS2-3 memory (70) is r■, so similarly to the above, the receiving conveyor motor (49) is rotated according to the flowcharts of FIGS. 6 and 9, and the rack elevator transfer drive unit (66) is driven, MLS2-3
"1" is stored in the memory (70) and the printed circuit board (2
The rack (1) in which the items stored in the rack (1) are transferred to the elevator section (7). Thereafter, the transfer operation to the elevator section (7) is completed according to the flowcharts shown in FIGS. 6 and 10.

When the operator confirms the empty rack (1) stopped on the discharge conveyor (55) with the LS4 sensor (12) in the ON position, the operator moves the trolley (
3) Move. And rack receiving conveyor section (5)
In the same way as when transferring the rack (1) to the
, and align the light beam coming from the floodlight (58〉) with the alignment bin (
23) to block the light and turn on the LS5 sensor (13). Then, the MLS4-5 memory (72) is “O” and the LS
Since 4 sensors (12) are ON, Figs. 6 and 13
The discharge conveyor motor drive unit (64) drives the discharge conveyor motor (56) according to the flowchart in the figure.
``1'' is stored in the S4-5 memory (72). In this way, the empty rack (1>) is conveyed to the discharge conveyor (55).

Then, the operator transfers the rack (1) that has been conveyed to the discharge conveyor (55>) onto the cart (3) by moving it onto the free roller conveyor (15) via the discharge free roller (57). At this time, the free roller (57) (
17) The rack (1) moving above is smoothly transferred onto the trolley (3) without tilting. When the transfer of the rack (1) is completed and the operator returns the lever (21), The alignment pin {2
3} retreats.

Then, the retreating pressing piece (36) presses the stopper receiver (31) and moves it along the guide member (32), causing the tapered part (3
7) presses the upper part of the movable stop collar (20), and the movable stop collar (20) supports the spring (3) with the stopper support shaft (25) as a fulcrum.
The free roller conveyor (1) rotates against the urging force of (0).
5) It will be in a state where it can be locked to the upper rack (1).

Also, due to the positioning pin (23) retracting, the LS5
The sensor (13) is turned off and the MLS4-5 memory (
72) is "r1", the discharge conveyor motor (56>) is stopped according to the flowcharts in FIGS. 6 and 14, and the MLS4-5 memory (72) is reset and "
0".

Also, since the rack (1) is no longer on the receiving conveyor (48), the operator places the rack (1) containing the printed circuit board (2) in the same manner as before and turns on the LS1 sensor (9). Then, the receiving conveyor (48>) is transferred to the receiving conveyor section (5), and is conveyed to a position where the LS2 sensor (10>) is turned on, and is kept on standby.

After this, the above-mentioned operation is repeated every time the printed circuit board (2) of the rack (1) becomes empty in the elevator section (7).

(G) Effects of the Invention By doing the above, the present invention makes it possible to reliably match the height positions of the transport conveyor and the cart, and to make it possible to operate the transport conveyor without any effort. Can be done.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of a substrate supply device and a trolley to which the transport device of the present invention is applied, FIG. 2 is a plan view of the substrate supply device, and FIG.
The figure is a partially cutaway side view of the cart, FIG. 4 is a partially cutaway plan view of the cart, FIG. 5 is a block diagram related to the control of the present invention, and FIGS. 6 to 14 are operations of the substrate supply device. It is a figure which shows the flowchart of. (1)...Magazine rack, (3)...Dolly,
(4)...Substrate supply device, (5)...Rack receiving conveyor section, (6)...Rack discharge conveyor section, (9
)...LS1 sensor, (13)...LS5 sensor, (16)...base, (21>...lever
(22)... Conveyor height adjustment handle, (23
)...Positioning pin, (39)...Screw shaft, (48
)...Receiving conveyor, (49)...Receiving conveyor motor, (53)(58)...Floodlight, (54)(
59)...Receiver, (62)...CPU, (
64)...Discharge conveyor motor drive unit, (65).
...Receiving conveyor motor drive unit.

Claims (2)

[Claims] (1) A transport conveyor driven by a transport drive source, on which an object is placed and transported, and the object is transferred from a trolley whose height can be adjusted by a height adjustment mechanism. In the conveying device, the positioning member is attached to the trolley so that the height can be adjusted along with the height of the placement surface by the height adjustment mechanism, and when the trolley approaches the conveyor, a detection means that detects the presence of the alignment member when the alignment member is within a predetermined height range; and a detection unit that detects the absence of the alignment member and adjusts the height by the height adjustment mechanism. A conveyance apparatus comprising: a control means for controlling the conveyance drive source to be able to start driving when the presence of the alignment member is detected later. (2) A transport conveyor that is driven by a transport drive source to transport an object stopped at a stop station, and an object placement surface on which the object transferred from the transport conveyor is placed and transported. In a conveyance device comprising a cart whose height is adjustable by a height adjustment mechanism, a positioning member is attached to the cart so that the height thereof can be adjusted along with the height of the placement surface by the height adjustment mechanism. a detection means for detecting the presence of the alignment member if the alignment member is within a predetermined height range when the cart approaches the conveyor; and a control means for controlling so that driving of the transport drive source can be started when the presence of the alignment member is detected after height adjustment by the height adjustment mechanism. conveyance device.