JPH01269661A - Direction change device for self-travelling type motor-draiven dolly - Google Patents

Abstract

PURPOSE:To permit the direction change of a dolly with the simple constitution by installing a turning mechanism having a rail cut piece for direction change of the motor-driven wheel of a dolly at a direction change position of a guide rail for guiding the traveling of the self-traveling type motor-driven dolly which is suitable for the automobile production line, etc. CONSTITUTION:A dolly body 2 having a nearly square form and an elevator 4 for transported article which is installed onto the upper surface of the dolly 2 and raised and lowered by a driving means 5 are installed. A self traveling dolly 1 having the front and rear motor-driven wheels in turnable ways around a longitudinal axis on the undersurface of the dolly body 2 is travelled along a guide rail 3. On the floor surface F of the crossing parts of the guide rails 3 and 3 arranged in the different directions, a rotary mechanism 9 having a rail cut piece 9 for selecting the direction of the motor-driven wheel is installed. When the motor driven wheel is stopped on the rotary mechanism 9, in the state where the rail cut piece 8 is continuous to one guide rail 3, the rotary mechanism 9 is operated, and the motor-driven wheel is revolved with the rail cut piece 8, and direction change of the dolly 1 is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a direction changing device for a self-propelled electric trolley used, for example, in an automobile production line.

2. Description of the Related Art Conventionally, for example, on an automobile production line or a production line for household electrical appliances, various parts have been mounted on a self-propelled electric trolley with objects to be transported, such as intermediate products for assembly.

Problems to be Solved by the Invention When changing the traveling direction of such a self-propelled electric trolley, conventional guide rails are gradually curved to change the direction of the guide rail itself, and the self-propelled electric trolley is moved along this guide rail. The direction of travel of the trolley was changed by running it along the curve of the guide rail, but this had the problem of requiring a large space within the factory to install the guide rail.

In addition, conventionally, from the viewpoint of convenience in the work of installing parts, etc., when changing the direction of the self-propelled electric trolley while changing the direction of movement of the self-propelled electric trolley, the orientation of the trolley itself, and therefore the direction of the transported object placed on the trolley, has been changed. In the past, the cart itself was equipped with a mechanism to change the direction of the entire cart, or a rotation mechanism was installed to change only the direction of the conveyed items on the cart, but this made the structure of each cart complex. However, there is a problem in that the manufacturing cost of the cart is high, which in turn increases the equipment cost of the conveyor system in the production line of automobiles, etc.

An object of the present invention is to solve the above-mentioned problems, and to be able to reliably change the traveling direction of a self-propelled electric trolley, for example, to the right angle direction, in an extremely small amount of space. The self-propelled electric trolley can be moved in the same direction as 1.
7, the direction of the trolley itself can be reliably changed, which is very convenient.Moreover, the structure of each self-propelled transport trolley is simple, and its manufacturing cost is low, so the equipment of the conveyor system is The object of the present invention is to provide a direction changing device for a self-propelled electric trolley that can reduce costs as much as possible.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a first aspect of the present invention, in which electric wheels are attached to the lower surface of a truck body so as to be able to freely rotate in a horizontal plane, and are arranged in different directions. A rail segment rotation mechanism including a rail segment for electric wheel direction switching is provided on the floor surface of the intersection of at least two bogie guide rails arranged so that the one-knoll segment is connected to one of the guide rails. In this state, when the motorized wheels of the bogie that have traveled along the guide rail are stopped on the rail segment rotation mechanism, the electrically powered wheels move together with the rail segment at a required angle in the horizontal plane due to the operation of the rail segment rotation mechanism. The subject matter is a turning device for a self-propelled electric trolley, which is rotated so that a rail segment is positioned in series with the other guide rail.

Next, the second aspect of the present invention is that electric wheels are arranged on the lower surface of the trolley body so as to be able to freely rotate in a horizontal plane,
A turntable for changing the direction of the cart is provided on the floor where the direction of the cart is to be changed, and the end of the guide rail on the cart entry side and the guide on the cart discharge side arranged at a predetermined distance therefrom are attached to the turntable. The end of the rail is visible,
The turntable is provided with a rail fragment rotation mechanism that includes a rail fragment for electric wheel direction switching, and the rail fragment is arranged so as to be continuous with one of the guide rails on the entry side of the bogie, and the rail fragment is moved along the guide rail. When the trolley is stopped on the turntable and its electric wheels are stopped on the rail segment rotation mechanism,
The turntable is rotated through the required angle, and
A self-propelled vehicle, in which the electric wheels are rotated together with the rail segment at a required angle in a horizontal plane by the operation of the rail segment rotation mechanism, so that the rail segment is positioned in series with the other bogie discharge side guide rail. The outline of the direction change device for electric trolleys is 12.

Example Next, embodiments of the invention will be described based on the drawings.

Note that the drawings show the case where the present invention is applied to an automobile production line.

In this specification, "front" refers to the direction in which the cart moves, and "left and right" refers to the front.

In the drawing, a guide rail (3) is laid on the floor (F) via a liner (7). This guide rail (3
) A self-propelled electric trolley (1) that travels along a drive means (5) carries objects to be transported (lO) such as intermediate parts for automobile assembly on the upper surface of a substantially rectangular trolley body (2) when viewed from above. A conveyance lifting platform (4) that is raised and lowered by ), a total of four adjacent truck coupling mechanisms (20) are provided on the front, rear, left and right side edges of the vehicle.

Rotating plates (12) (12) having a pair of left and right hanging bearing brackets (13) (13) are attached to the front and rear sides of the lower surface of the center of the width of the main body (1) so as to be able to freely rotate. Bearing bracket (13) of rotating plate (12) (
13), electric wheels (11) transferred over the liner (7)
are pivotally connected, and one truck (1) is ultimately equipped with a pair of front and rear electric wheels (11).

And one left bearing bracket (
On the left side of the motorized wheel (11), there is a drive mechanism (
14) is attached. This drive mechanism (14) includes a general-purpose motor, a speed reducer, and a brake. Further, a roller mounting bracket (15) is provided on the right side of the right bearing bracket (13) of each rotary plate (12), and a pair of left and right roller mounting brackets (15) are provided on the lower surface of the horizontal part of this bracket (15).
A set of horizontal steady rollers (16) are pivotally mounted, and these rollers (1G) are brought into contact with both left and right side surfaces of the guide rail (3).

Furthermore, both front and rear electric wheels (
A total of 4 casters (1
7) are attached so as to be able to rotate freely within a horizontal plane, and these casters (17) roll on the floor surface (F).

1 and 2 show direction changing devices for self-propelled electric trolleys according to the first and second aspects of the present invention.

That is, in the figure, the direction changing device for a self-propelled electric trolley according to the first invention is shown in the latter half of the direction of travel, and the direction changing device for a self-propelled electric trolley equipped with the turntable according to the second invention is shown in the front half. It is shown.

First, in the first invention, the bogie guide rail (3) includes one pillar guide rail (3A) that allows the self-propelled electric bogie (1) to move forward vertically, and a column guide rail (3A) that is installed parallel to this to allow the bogie to move forward. (1) is provided with one assembly guide rail (3C) that allows the assembly part to move backward while remaining vertically oriented, and two communication part guide rails (3B) (3B) that connect the two.

A rail fragment rotation mechanism (9) comprising a rail fragment (8) for electric wheel direction switching is provided on the floor surface (F) at the intersection of at least two bogie guide rails (3) arranged in different directions. It is being

Specifically, two intersections between one column guide rail (3A) and two communication guide rails (3B) (3B), and two communication guide rails (3B) (3
A rail fragment rotation mechanism (9) comprising a rail fragment (8) for electric wheel direction switching is installed on the floor surface (F) of the two intersections between B) and one assembly guide rail (3C). Each is provided.

In the direction change device for a self-propelled electric trolley (1) of the first invention, for example, in a state where two rail segments (8) (8) are arranged so as to be continuous with one pillar guide rail (3A), When the pair of front and rear electric wheels (11) (11) of the truck (1) that has traveled along the guide rail (3A) are stopped on the rail fragment rotation mechanisms (9) (9), these The electric wheels (11) (11) are rotated by the operation of the rotating mechanism (9) (9) to the rail fragment (8) (8
) is rotated through 90 degrees in the horizontal plane so that the rail pieces (8) (8) are connected to the other connecting guide rail (3B).
(3B).

Therefore, after this, by rotationally driving the electric wheels (11) (11), the trolley (1) is now moved along the communication guide rails (3B) (3B), that is, along the pillar guide 1 mail (3A). It is made to run in a direction perpendicular to the vehicle.

In addition, a self-propelled electric trolley (1) is installed on two communication guide rails (
3B) (3B) Two rail segment rotation mechanisms (8) with electric wheel direction change rail segments (8) (8) during the transition at right angles from (3B) to the rear guide lug (3G)
9) By the operation of (9), the direction of the electric wheels (11) is changed as in the case of item 2.

The self-propelled electric trolley <1> is equipped with four casters (17) that can freely rotate like two sets, and these casters (17) are placed on the left and right sides of the guide rail (3). placed on both sides. Guide rails (3) are arranged vertically and horizontally on the floor surface (F), so that when the trolley (1) moves forward without changing direction, or when it changes direction and moves sideways. In order to do so, any of the four casters (17) must cross any of the guide rails (3).

In this embodiment, the communication guide rail (3B) (
A rail discontinuity is formed in the portion where the caster (17) of 3B) is scheduled to cross, and a caster relief rail segment (18) is fitted into this discontinuity. This caster relief rail fragment (18) has one end set as a rotary plate (19), and the caster (17)
When it hits, it swings in either direction 1. After passing the caster (17), it returns to its original position by the elastic force of a spring (not shown).

Specifically, the caster relief rail fragment (18) and the rotating plate (19) are connected to the front communication guide rail (
311), and two locations on the right side of the rear communication guide rail (3B), these are placed on the casters (17) when the self-propelled electric trolley (1) moves forward or backward. ) are for crossing the communication guide rail (3B).

Further, in this embodiment, each caster (1)) is
Because it is arranged near the rear side of the electric wheels (11), for example, the trolley (1) can change direction 17 at right angles from the pillar guide rail (3A) to the communication guide rail (3B) (313) side. When traveling, a pair of casters (1γ) (17) on the left front and rear of the trolley (1) are mounted on electric wheels (
11) In order to change the direction of cii), the rail segments (8) (11) are arranged to pass through a discontinuity in the laterally oriented column guide rail (3A). In addition, the trolley (1) is connected to the communication guide rail (3iJ) (3B
) to the rear guide rail (3C) side,
Similarly, the front and rear pair of casters (17) (17) on the right side of the truck (1) pass through the discontinuous part of the rear guide rail (3c) where the rail fragments (8) (8) are oriented in the left-right direction. It is meant to be done.

In addition, each of the self-propelled electric trolleys (1) (17)
If the column guide rail (3
A) and the rear guide rail (3c) may be provided with rotary plates (19) having caster relief rail pieces (18) at required locations.

In addition, a power supply rail (42) is laid on the floor (F) at a predetermined interval with respect to the bogie guide rail (3), and a power supply rail (42) is laid on the left side of the rear end of the bogie body (2). )
A pantograph (44) equipped with a current collector (43) that moves along the λ is currently in demand.

The power supply rail (42) includes a pillar power supply rail (42A) and a rear power supply rail installed parallel to the column power supply rail (42A), as in the case of the bogie guide rail (3). It connects the Ii rail (42C) and the communication section power supply rail (4213) that connects the two. The middle part of the connecting power supply rail (42B) is installed below the floor (F), and is three-dimensionally intersected with the pillar guide rail (3A), allowing the electric power supply of the trolley (1) to Wheel(
11) and casters (17).

A rail segment rotation mechanism (59) including a pantograph direction switching rail segment (58) is provided on the floor surface (do) of the intersection of at least two power supply rails (42) arranged in different directions. There is.

Specifically, the floor surface (F ) are each provided with a rail segment rotation mechanism (59) comprising a pantograph direction switching rail segment (58).

For example, when the direction of the self-propelled electric trolley (1) that has been moving along the pressure section power supply rail (42A) is changed to a right angle, the pantograph (44) of this trolley (1) is rotated by the rail segment rotation mechanism ( 59), and in this state, the rotation mechanism (59) is operated to rotate the pantograph (44) together with the rail fragment (58) 9 in the horizontal plane.
Rotated by 0 angle, rail fragment (5g) (5g)
is arranged so as to be continuous with the other communication section power supply rail (42B) (42B).

Therefore, after this, by rotationally driving the electric wheels (11) (11), the pantograph (44) of the trolley (1)
This time, it moves along the communication section guide rail (42B) (42B).

In addition, the assembly section power supply rail (
42G) when the self-propelled electric trolley (1) moves to
Similarly to the above case, the rail segment rotation mechanism (59) comprising the pantograph direction changing rail segment (58) is activated and the pantograph (4)
4) The direction can be changed.

Note that details of the structures of the power supply rail (42) and the panda graph (44) will be described later.

Next, in the second aspect of the present invention, without changing the traveling direction of the electric truck (1) traveling along the outward guide rail (3A), the direction of the electric truck (1) itself is changed, so to speak. A turntable for moving forward sideways (
20) is provided.

In other words, a turntable (2) for changing the direction of the truck is placed at the point where the column guide rail (3A) is extended and at the floor part (F1) where the direction of the self-propelled electric truck (1) is to be changed.
0) is provided, and the end of one bogie entry side guide rail (3A) with respect to this turntable (20), and two bogie discharge side guide rails (3A) arranged at a predetermined distance from this 3D) The end of (3D) is visible.

The turntable (20) has a trolley guide rail extension (
3E) is provided, and this guide rail extension (
On both sides of the electric wheel direction switching rail fragments (8
) are provided. A pair of rail segment rotation mechanisms (9) are provided.

Then, in a state in which the guide rail extension (3E) and the two rail segments (8) on both sides thereof are arranged in a straight line so as to be continuous with one of the bogie entry side guide rails (3A), the guide rail ( The cart (1), which has been traveling vertically along the road (3A), is stopped on the turntable (20), and its pair of electric wheels (1) are stopped on the turntable (20).
1) (11) are the rail fragment rotation mechanism (9) (
9) It is forced to stop at the top. In this state, the turntable (20) is rotated 90 degrees, and the electric wheels (11
) (11) is rotated 90 degrees in a horizontal plane together with the rail pieces (8) (8), so that the rail pieces (8) (11)
is arranged so as to be continuous with the other bogie discharge side guide rail (3D) (3D)).

Therefore, after this, the electric wheels (11) (11) are rotationally driven, and the trolley (1) is now moved to the discharge side guide rail (
3D) (3D) without changing its direction of travel, but the truck (1) itself is made to travel sideways.

At the side edge of the floor portion (F1) where the direction of the self-propelled electric trolley (1) itself is to be changed, the power supply rail (42)
is installed below the floor part (F1), and a pantograph (44
) is provided with a slit (57) for letting it escape.

In the part of the bogie guide rail (3) that intersects with this slit (57), a rail discontinuity is formed in the same manner as in the case of releasing the casters (17), and in this discontinuity, the pantograph release rail fragment ( 68) are fitted together. One end of this caster relief rail piece (68) is attached to the rotating plate (69), and when the pantograph (44) hits it, it can swing to one side and escape, and the pantograph (44) After passing, it returns to its original position by the elastic force of a spring (path shown).

In addition, in Figures 3 to 7, self-propelled electric trolleys (
1) Driving means (5) for the conveyance platform (4) provided in
The central part is connected in an X shape by a connecting bottle (23), and one set of first cylinders are arranged on each side of the left and right sides and can be opened and closed.
and the second link (21) (22), both links (21
) (22) and a fluid pressure cylinder (24) for opening and closing. On both left and right sides of the lifting platform (4), the front ends of the first and second links (21) (22) are perpendicular to the side surfaces of the lifting platform (4) and the transverse abbreviated guide rail (26), respectively. The two links are pivotably connected to each other by means of bins (27) (27), and both links <21) (2
2) Rollers (28) (28) are attached to the rear ends, respectively, and these rollers (28) (2g) are horizontally aligned with the lower surface of the side edge of the lifting platform (4) and the guide rail (2B). The upper surfaces of the parts are respectively brought into contact with each other so that they can be moved freely. Also, the first link (21) on the left and right sides of the lifting platform (4)
(21) A lower horizontal connecting rod (2g) is secured between the two, and the rear end of the fluid pressure cylinder (24) is swingably attached to the center of this horizontal connecting rod (29). Attached and inner second link (22) (22)
The upper horizontal connecting rod (30) is stopped between the two holes, and a cylinder (30) is attached to the center of this horizontal connecting rod (30).
The tip of the piston rod (25) of 24) is connected to the piston rod (25). Therefore, as the piston rod (25) of the fluid pressure cylinder (24) moves in and out, the first and second links (21) < 22 on both the left and right sides are opened and closed at 17 around the connecting bottle (23). A lifting platform (4) is configured to move up and down.

The adjacent bogie coupling mechanism (31) is provided on the front, rear, left and right side edges of the bogie body (2), and each adjacent bogie coupling mechanism (31) is horizontally attached to the lower surface of the side edge of the bogie body (2). A hook (32a) having a hook-shaped tip (32a) pivotably mounted
32), a hydraulic cylinder (34>) that operates this hook (32) via a link mechanism (37), and an engagement that engages with the piece-shaped tip (32a) of the hook (32) of the adjacent coupling wheel (1). It is composed of a combination bottle (36).

And the hook (32) of each adjacent trolley connection mechanism (31)
The arm (33) has a hook-shaped tip (3
2a) and is provided so as to protrude to the opposite side,
One end of a link mechanism (37), which includes a pair of short links (37a) and (37b) that are connected to each other by a pin, is connected to the tip of the arm (33). The other end of the link mechanism (37) is pivotably attached to the lower surface of the side edge of the truck body (2). Attach the Vinton rod (35) of the hook actuating hydraulic cylinder (34) to the connecting pin between the two links (37a) and (37b).
) are rotatably connected, and a link mechanism (37) is connected to the trolley body (2) near the pivot point of the hook (32).
A stopper (39) projecting downwardly is provided to engage with the stopper (39). The base end of the fluid pressure cylinder (34) is pivotably mounted on the lower surface of the side edge of the truck body (2).

Here, the piston rod (
25), the two links (37a) of the link mechanism (37) will be removed, as shown by the dashed line in Fig. 4.
(37b) is stretched in a straight line, and both links (37a) (
3713) is connected to the hook (3713) via the arm (33) in order to maintain the mutually inverted V-shaped state by the engaging means (shown in the figure) provided on the pivot joints of both at the point beyond the straight line.
32) swings in a horizontal plane, and the hook-shaped tip (32a) of the hook (32) engages with the engagement pin <36) of the adjacent coupling wheel (1). In this state, the link mechanism (37) is connected to the stopper (
39) and one link (37a)
(37b) is an inverted dog shape, so even if hook (32〉)
If an external force that returns in the opposite direction acts l-, even if (7), both links (3
7a) (37b) In order to act as a catch rod and prevent the hook (32) from returning, a hydraulic cylinder (
24), the adjacent east (1) (1,)
Even if the operation of the hydraulic cylinder (24) is stopped after connecting the two adjacent cars (1) to (1), the connected state of the adjacent combined cars (1) (1) can be maintained as it is, and therefore, it is extremely safe. It's expensive.

Hanging walls (
3B) is provided, and an opening (40) through which the hook-shaped tip (32a) of the hook (32) is inserted and removed is provided in the central part of the length of the three hanging walls (38), and Hook (32)
The hook-shaped tip (32a) of the engaging pin (3G
) are formed in parallel with openings (41) for engagement with the openings (41).

By the way, in order to interconnect self-propelled electric carts (1) that move along guide rails (3), for example, with adjacent ones in the front and rear, the rear end of the leading cart (1) and the trailing cart ( 1), the piston rod (3) of the hydraulic cylinder (34) of the coupling mechanism (31) (31) of both the bogies (1) (1)
5) It is sufficient to make each of (35) protrude. This causes the hooks (32) (32) to swing in the horizontal plane as described above, causing the respective hook-shaped tips (32a) (3
2a) is the engagement pin (3G) of the other truck (1) (1)
(3B), and the front and rear carts (1) and (1) are firmly connected.

In addition, the ones shown are mutually adjacent carts (1) (1).
Both of the coupling mechanisms (31) (31) are operated to connect the bogies (1) (L), but the invention is not limited to this, for example, the following bogie (1) is connected to the preceding bogie (1). ), the connection mechanism (31) of one of the trailing carts (1)
By swinging only the hook (32) of both carts (1') (1
) may be concatenated.

Further, although not shown in the drawings, the self-propelled electric trolleys (1) (1) adjacent to each other on the left and right can also be connected in exactly the same manner. In this way, when connecting the carts (1) (1) that are adjacent to each other on the left and right, for example, the carts (1) running vertically along the guide rail (3) may be arranged in parallel on the left and right. In addition to connecting the left and right side edges of the adjacent combined cars (+) (1) via the connecting mechanism (31), as shown in FIGS. 1 and 2, the guide rail ( 3
), the direction of the cart (1) itself, which is running vertically along This time, move it sideways, so to speak, and move the front and back edges of it (the left and right edges before changing direction).
There are cases where the two are connected to each other via a connecting mechanism (31).

In addition, a power supply rail (42) is laid on the left side of the guide rail (3) on the floor (F) at a predetermined interval, and a power supply rail (42) is laid on the left side of the rear end of the bogie body (2). A pantograph (44) equipped with a current collector (43) that moves along the
) is attached.

That is, as shown in detail in FIGS. 6 and 7, a rotary plate (45) is pivotally attached to the lower surface of the left side of the rear end of the truck body (2) so as to be able to freely rotate. A long box-shaped upper roller holding member (46) whose front and rear ends are closed and opens only downward is horizontally attached to the - side of the board, and a rectangular plate-shaped member (46) that moves along the power supply rail (42) is attached horizontally. On the same side of the current collector main body (47), a long box-shaped lower roller holding member (48) with both front and rear ends closed and open only upward is arranged so as to face the upper roller holding member (46). It is mounted horizontally. Pantograph (44
) The two links (51) and (52) are X when viewed from the side.
rollers (54) (54
) are pivotally mounted on the left and right, and these rollers (54)
(54) is held removably within the upper roller holding member (46), and a pair of left and right rollers (55) (55) are similarly pivoted to the lower ends of both links (51) and (52). These rollers (55) (55) are held in a lower roller holding member (48) so as to be freely transferable.

In addition, a current collecting section (43) is provided on the side surface of the current collecting section main body (47) on the power supply rail (42) side, and a pair of upper and lower grooved vertical rollers (5B) (56) are pivotally mounted. On the other hand, the power supply rail (42) is composed of a power supply rail main body (49) having a substantially C-shaped cross section, and a power supply part (50) installed inside the main body and having a power distribution line (path shown). The current collector (43) is connected to the power supply rail body (4
9) When the grooved vertical roller (56) (5B) is fitted into the upper and lower edges of the opening of the power supply rail body (49) and brought into contact with the power supply part (50), The current collector body (47) is guided and held along the power supply rail body (49).

The power supply rail (42), as shown in FIGS. 1 to 5,
Usually the floor surface (F) so that its maintenance is easy
However, in designated locations where there are no obstacles on the floor (F)lx, the power supply rail (42) is laid on the floor as shown in Figures 1, 6, and 7. It is laid below (F). When the TEPCO section (43) of the vantograph (44) enters the floor (F) by being guided by such a power supply rail (42), its link (51)
) (52) opens around the bottle (53) and extends vertically, allowing the TEPCO department (43) to connect to the power supply rail (42).
) and is always in contact with the power supply part (50), so that electricity is supplied at a low rate. The power feeding unit (50) is provided with, for example, three power distribution lines (not shown), two of which are used for power supply, and the remaining one power distribution line is used for signal transmission. used.

Furthermore, as mentioned above, in the part where the power supply rail 42) is arranged below the floor (F), the slit (57) is provided in the floor (F) parallel to the power supply rail (42). 2 links of pantograph (44) <51
) (52).

The above-mentioned object lifting platform (4) is mounted on a self-propelled electric trolley (
1) is capable of independently traveling at a desired speed by driving electric wheels (11).

In the above embodiment, two electric wheels (11) are attached to the self-propelled electric trolley (1) at the front and rear.
It is sufficient that at least one of these is removed. In this case, on the floor (F) or turntable (20) where the direction of the cart (1) should be changed, the electric wheel direction can be changed according to the number of electric wheels (11) provided on the cart (1). A rail section rotation mechanism (9) comprising a 1m rail section (8) is installed.

Also shown is a link mechanism that is equipped with one fluid pressure cylinder (24) as the drive means (5) for the conveyance platform (4) and has two sets of X-shaped links (21, 22) on the left and right. However, depending on the weight of the conveyed object (10), two or more hydraulic cylinders (24) may be provided in parallel, and depending on the height to which the lifting platform (4) is to be raised. Two X-shaped links (upper and lower) or more
A link mechanism combining 1) and (22) may be used. Alternatively, the driving means (5) is not limited to such a link mechanism, and other means may be used.

Further, in the embodiment, a work space (6) is provided on the upper surface of the trolley body (2) so as to surround the conveyed object lifting platform (4). 11
It is sufficient if it is provided on at least one side of the lifting platform (4) on the upper surface of the main body (2).

In addition, in the illustrated example, adjacent trolley coupling mechanisms (31) are provided at the front, rear, left, and right side edges of the trolley body (2), respectively. , > It is sufficient if the holder is provided at least on the - side edge. In addition, the hooks (32) having hook-shaped tips (32a) and the engaging pins (3G) must be provided on both side edges of the adjacent carts (1) and (1) to be connected. Instead, it is sufficient that the adjacent cart main body (1) < 1) is provided with a hook (32) on one side edge and an engaging pin (36) that engages with the hook on the other side edge. It is something. In addition, the adjacent trolley connection mechanism (31) is not limited to the one shown in the drawings, but also uses magnetic force. It may also be a connecting mechanism or the like.

Effects of the Invention First of all, the direction changing device for a self-propelled electric trolley according to the first aspect of the invention has a structure in which the electric wheels (11) are mounted on the lower surface of the trolley body (2) so that they can rotate freely in a horizontal plane. take(
A rail fragment rotation mechanism ( 9) and the rail fragments (8) are arranged so as to be continuous with one of the guide rails (3), the electric wheels (11 ) is the rail fragment rotator groove (9)
When stopped at the top, the rail fragment rotation mechanism (9
) causes the electric wheel (11) to rotate together with the rail segment (8) through the required angle in the horizontal plane. Since the one-knoll fragment (8) is positioned in series with the other guide rule (3), the traveling direction of the self-propelled electric trolley (1) can be determined by, for example, It is possible to reliably convert the conveyor line in the right angle direction and in a very small space, and therefore, the installation space for the conveyor line in the factory is very small.

Further, in the direction changing device for a self-propelled electric trolley according to the second aspect of the present invention, as described above, the electric wheels (11) are attached to the lower surface of the trolley body (2) so as to be able to rotate freely in a horizontal plane. , the floor part (F
1) is provided with a turntable (20) for changing the direction of the bogie, and the turntable (20) is provided with a guide rail on the bogie entry side (
3) and the end of a bogie discharge side guide rail (3) arranged at a predetermined distance from the guide rail (3), and the turntable (20) is provided with a rail for electric wheel direction switching. A rail fragment rotation mechanism (9) comprising a fragment (8) is provided, and in a state in which the rail fragment (8) is arranged to be continuous with one of the guide rails (3) on the bogie entry side, the guide rail (3) When the trolley (1) that has been traveling along the turntable (20) is stopped on the turntable (20) and its electric wheels (11) are stopped on the rail fragment rotation mechanism (9), the turntable (20) is rotated by a required angle, and the electric wheel (11) is rotated by a required angle in a horizontal plane together with the rail segment (8) by the operation of the rail segment rotation mechanism (9).
8) is positioned in series with the other trolley discharge side guide rail (3), so the direction of movement of the self-propelled electric trolley (1) remains the same and the direction of the trolley (1) itself can be changed. It is very convenient because it can reliably convert This has the effect that it can be effectively reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic perspective view showing the state in which the self-propelled electric trolley is used, and FIG. 2 is a plan view of the same, with objects to be transported being omitted. Figure 3 is an enlarged partially cutaway left side view of the truck, Figure 4 is an enlarged partially cutaway plan view taken along line IV-IV in Figure 3, Figure 5 is a rear view of the truck, and Figure 6 is a collection of the trucks. FIG. 7 is an enlarged left side view of the main parts with a partial cutout showing the details of the electric power part and the power supply part on the lower side of the floor surface, and FIG. (1)...Dolly, (2)...Dolly body, (3) (
3A) to (3E)...Guide rail, (4)...Transferred object lifting platform, (5)...Driving means, (6)...Working space, (8)...Electric wheel Rail fragment for direction switching, (9)...Rail fragment rotation mechanism, (10)...
Conveyed object, (11)...Electric wheel, (17)...Caster, (20)...Turntable, (31)...
・Adjacent trolley connection mechanism, (32)...Hook, (3G)
...Engagement pin, (42) (42^) ~ (42C)...
・Power supply rail, (44)...Pantograph, (F) (
F1)...Floor surface. that's all

Claims (2)

[Claims] (1) Electric wheels (11) are attached to the lower surface of the bogie body (2) so that they can freely rotate in a horizontal plane, and the floor surface of the intersection of at least two bogie guide rails (3) arranged in different directions. (F) is provided with a rail fragment rotation mechanism (9) having a rail fragment (8) for electric wheel direction switching, and the rail fragment (8) is arranged so as to be continuous with one of the guide rails (3). , the guide rail (3
) The electric wheels (11) of the trolley (1) that has traveled along
is stopped on the rail segment rotation mechanism (9), the electric wheel (1
1) is rotated together with a rail segment (8) through a required angle in a horizontal plane so that the rail segment (8) is positioned in series with the other guide rail (3). direction change device. (2) Electric wheels (11) are attached to the lower surface of the trolley body (2) so that they can freely rotate in a horizontal plane, and the trolley (1)
A turntable (20) for changing the direction of the truck is provided on the floor part (F1) where the direction of the truck should be changed, and the turntable (20)
The end of the bogie entry side guide rail (3) and the end of the bogie ejection side guide rail (3) arranged at a predetermined distance therefrom are visible at the turntable (20).
0) is provided with a rail fragment rotation mechanism (9) comprising a rail fragment (8) for electric wheel direction switching, and the rail fragment (8) is arranged so as to be continuous with one of the bogie entry side guide rails (3). In this state, the cart (1) that has traveled along the guide rail (3) reaches the turntable (20).
When the electric wheels (11) are stopped on the rail segment rotation mechanism (9), the turntable (20) is rotated through the required angle and the rail segment rotation mechanism (9) is rotated. Electric wheels (
11) is rotated by a required angle in a horizontal plane together with the rail segment (8) so that the rail segment (8) is positioned in series with the other bogie discharge side guide rail (3). A direction change device for electric trolleys.