JPH07304445A - Horizontality maintaining device for cargo shifting mechanism of conveying device - Google Patents

Abstract

PURPOSE:To properly convey, load, and unload a cargo by switching the load shifting mechanism of a traveling carriage to the rockable state and the nonrockable state to forcibly keep it horizontal. CONSTITUTION:A monorail type conveying device is provided with a traveling carriage 4 traveled along a monorail 1, a cargo shifting handling mechanism, and a lifting device 5. The lifting device 5 is rockably connected to the traveling carriage 4 in order to constitute a monorail type conveying device. A pair of rock restraining arms 46 are pivotally supported on the lifting device 5, and the rock restraining arms 46 are rotated and displaced to the operation position and the retreat position by an operating mechanism section. When the rock restraining arms 46 are held at the operation position, the rocking of the lifting device 5 and the handling mechanism is prevented, and the handling mechanism 6 is kept horizontal by a horizontality maintaining device 45. When the arms 46 are held at the retreat position, the rocking of the lifting device 5 and the handling mechanism is allowed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier device in which a load transfer mechanism is swingably supported on a traveling carriage that travels along a transfer track, and more particularly, to a horizontal maintenance device for the load transfer mechanism in the carrier device. It is about.

[0002]

2. Description of the Related Art Conventionally, in an assembly line of a factory or the like, an elevated monorail is provided on a ceiling portion, and while a traveling carriage is traveling on this monorail, various cargoes are loaded by a load transfer mechanism supported by the traveling carriage. A transport device is used to transport the. In such a transfer device, the load transfer mechanism is generally hung on the traveling carriage and swingably supported by the traveling carriage. In other words, when the traveling carriage travels on the slopes of the monorail uphill or downhill, the load transfer mechanism is allowed to swing with respect to the travel carriage, thereby maintaining the load transfer mechanism in a horizontal state. I try to carry it.

By the way, in such a device in which the load transfer mechanism is swingably supported with respect to the traveling carriage, it is advantageous in that the load transfer mechanism can be horizontally maintained on the slope of the monorail as described above. On the other hand, since the load transfer mechanism easily swings during traveling, there is an adverse effect of impairing traveling stability.

Therefore, recently, a steadying mechanism such as a damping mechanism using a damper member and a mechanism using fixed friction is provided to suppress unnecessary swinging of the load transfer mechanism with respect to the traveling carriage.

[0005]

By the way, according to the steady rest mechanism described above, it is possible to suppress unnecessary swinging of the load transfer mechanism with respect to the traveling carriage as described above, but the load transfer mechanism is not always horizontal. Could not always be maintained. That is, when a load is biased toward the load transfer mechanism, the load transfer mechanism is always inclined with respect to the traveling carriage due to the weight of the load. Even if unnecessary shake is suppressed, the tilt of the load transfer mechanism remains unresolved.

However, if the load transfer mechanism is kept tilted in this way, the loading and unloading operation of the load often occurs. Therefore, if the load transfer mechanism is biased, the load is loaded unevenly. Therefore, even if the load transfer mechanism tilts with respect to the traveling carriage, the load transfer mechanism is forcibly maintained in a horizontal state at a predetermined place of the monorail such as a place of unloading. It is necessary to ensure proper loading and unloading of luggage.

The present invention has been made in order to solve the above-mentioned problems, and a state in which the load transfer mechanism is allowed to swing with respect to a traveling carriage, and a state in which the load transfer mechanism is prevented from swinging, the load transfer mechanism is forcibly leveled. It is an object of the present invention to provide a horizontal maintaining device for a load transfer mechanism in a transfer device that can switch to a state in which the load is maintained and can appropriately transfer and unload the load.

[0008]

The invention according to claim 1 is
A transport device comprising a traveling carriage that travels along an elevated conveying track and a load transfer mechanism that is swingably supported by the traveling carriage, is provided so as to be displaceable between an operating position and a retracted position, and In the operating position, the swinging of the load transfer mechanism with respect to the traveling carriage is prevented to keep the load transferring mechanism horizontal, while in the retracted position, the load transfer mechanism for the traveling carriage is It is provided with a rocking restraint arm that allows rocking and an actuating mechanism section that operates the rocking restraint arm.

According to a second aspect of the present invention, in the horizontal maintaining device for the handling mechanism in the conveying device according to the first aspect, the swing restraining arm is provided on the traveling carriage, and the operation is performed. In the state of being in the position, it protrudes downward from the frame of the traveling carriage and abuts against the portion supporting the load transfer mechanism, while in the state of being in the retracted position, it is stored in the frame.

According to a third aspect of the present invention, in the horizontal maintaining device for the handling mechanism in the transporting device according to the second aspect, the swing restraint arms are provided in front of and behind the traveling direction of the traveling carriage, and travel. It is pivotally supported on the frame of the carriage, and the front and rear swing restraining arms are interlocked with each other.

According to a fourth aspect of the present invention, in the horizontal maintenance device for the handling mechanism in the transport device according to any one of the first to third aspects, within a certain section including a predetermined work position in the transport track with respect to the traveling carriage. The control means for controlling the actuating mechanism section is provided so that the swinging restraining arm is displaced to the actuating position.

[0012]

According to the invention described in claim 1, when the traveling carriage passes through the uphill portion and the downhill portion of the transport track, the swinging restraining arm is held at the retracted position. The load transfer mechanism swings with respect to the traveling carriage so that the load transfer mechanism becomes horizontal in response to a change in the angle of the traveling carriage due to movement from the horizontal portion to the slope portion or movement from the slope portion to the horizontal portion. On the other hand, at a predetermined position on the transportation track, such as a loading / unloading place for cargo, the swinging and restraining arm is held in the operating position, whereby the load transfer mechanism is forcibly maintained in a horizontal state.

According to the second aspect of the present invention, the rocking restraint arm projects downward from the frame of the traveling carriage and abuts against a portion supporting the cargo transferring mechanism, whereby the cargo transferring mechanism is rocked. Is blocked and kept horizontal, while the swinging restraining arm is stored in the frame, the swinging of the load transfer mechanism is allowed.

According to the third aspect of the present invention, the rocking restraining arms are provided in front of and behind the traveling direction of the traveling vehicle, and the rocking restraining arms are interlocked with each other to set the operating position and the retracted position. Is displaced.

According to the fourth aspect of the present invention, the swinging and restraining arm is automatically held at the operating position within a certain section of the transportation track, for example, at the loading / unloading place of the cargo and its vicinity. The rocking of the load transfer mechanism is forcibly prevented when the cargo is unloaded.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A horizontal maintenance device for a load transfer mechanism of the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment of a monorail type transfer device equipped with a horizontal maintaining device according to the present invention. In these figures, reference numeral 1 denotes a monorail as a transportation track, which is supported in a hanging manner on a ceiling 3 of a factory or the like via a support arm 2.

A traveling carriage 4 mounted on the monorail 1
As will be described later, the lifting device 5 includes a hoisting mechanism.
, And a handling mechanism 6 for supporting various loads through the lifting device 5 is supported so as to be lifted in a suspended state, and the lifting device 5 and the handling mechanism 6 constitute a load transfer mechanism. ing.

The main body of the traveling carriage 4 is equipped with a motor 7 that serves both as a drive source for traveling and a drive source for raising and lowering the handling mechanism, and is driven by this motor 7 to roll on the monorail 1. Drive wheels 8 are provided. Furthermore, the main body of the traveling carriage 4 includes a lower roller 9 and a guide roller 1 which contact the lower side and both sides of the monorail 1.
0, a control unit 11 for controlling the drive system, a current collector 12 for receiving power from a trolley wire (not shown) attached to the monorail 1, and the like.

Further, in the traveling carriage 4, an output shaft 12 projects from the motor 7, and on the output shaft 12,
The drive wheel 8 is rotatably supported, and a traveling clutch 13 formed of an electromagnetic clutch and a traveling brake 14 formed of an electromagnetic brake are arranged on both sides of the drive wheel 8. The driving force of the motor 7 is transmitted to the drive wheels 8 when the traveling clutch 13 is on and the traveling brake is off. Also, because of the transmission to the lifting device 5,
A timing pulley 15 is provided on the output shaft 12 at the side of the traveling clutch 13, and a timing pulley 2 described later is provided at a connecting portion between the traveling carriage 4 and the lifting device 5.
The timing belt 16 is stretched over 0 and the timing pulley 15.

A support bracket 17 is integrally connected to the lower end of the main body of the traveling carriage 4, and an elevating device 5 of a load transfer mechanism is swingably connected to the support bracket 17. More specifically, a connection shaft 19 is rotatably supported on the support bracket 17 via a bearing, and an upper frame 18 of the lifting device 5 is rotatably supported on the connection shaft 19 via a bearing. As a result, the elevating device 5 can swing back and forth with respect to the traveling carriage 4 about the connecting shaft 19 as a fulcrum.

On one end side (left end in FIG. 2) of the connecting shaft 19, timing pulleys 20 and 21 are integrally provided on the shaft, and the timing belt 16 is attached to one timing pulley 20 as described above. A drive transmission shaft 22 that is hung around and rotatably supported by the frame of the lifting device 5.
Is provided with a timing pulley 23, and a timing belt 24 is stretched over the timing pulley 23 and the timing pulley 21. As a result, the power from the motor 7 is transmitted to the lifting device 5.

The hoisting device 5 is provided with a hoisting mechanism driven by the power thus transmitted from the motor 7. The hoisting mechanism includes drums 25 rotatably provided in front and rear pairs on both sides (left and right sides in FIG. 2) of the frame of the lifting device 5, belts 27 drawn from the drums 25, and lifting and lowering devices. The device 5 includes guide rollers 26 rotatably mounted on both front and rear sides of both sides of the frame, and a belt 27 led out from each drum 25 extends downward through each guide roller 26. , Its tip is coupled to the upper end of the handling mechanism 6.

Although not shown, the lifting device 5 is provided with a plurality of timing gears, a lifting clutch composed of an electromagnetic clutch, and a lifting brake composed of an electromagnetic brake. Is off, the rotational power of the drive transmission shaft 22 is transmitted to each drum 25 via the timing gear. At this time, the pair of front and rear drums 25 are configured to rotate synchronously in mutually different directions on the both side portions, whereby the same amount of the belt 27 is drawn out or wound up from each drum 25. Thus, the handling mechanism 6 can be moved up and down.

By the way, in the above monorail type transport device, a steady rest for preventing swing of the handling mechanism 6 with respect to the traveling carriage 4 (more accurately, integral swing of the lifting device 5 and the handling mechanism 6) during traveling. The device and the leveling device 45 according to the present invention are integrally provided.

The steady rest device specifically comprises a steady rest mechanism 30 and a cushion mechanism 40.

As shown in FIG. 3, the steady rest mechanism 30 comprises a shock absorber 31, a locking arm 34 and a cam 37. The shock absorber 31 and the locking arm 34 are on the support bracket 17, and the cam 37 is on the upper side. Each is attached to the frame 18. More specifically, the locking arm 34 is rotatably attached to the support bracket 17 via a support shaft 35 projecting toward the base end side thereof, and the shock absorber 31 is provided at the upper end portion side thereof. It is arranged. Shock absorber 3
A piston 32 protrudes from the lower part of 1 and is biased downward by a spring 33. The cam 37 is fixed to the upper frame 18 at a position below the locking arm 34 as described above, and has arcuate engaging grooves engaging grooves 38a to 38c at predetermined positions on the outer peripheral surface thereof.
Is formed, and the locking roller 36 axially supported by the intermediate portion of the locking arm 34 projects into these engaging grooves. These engaging grooves 38a to 38c are formed in accordance with the traveling angle of the traveling carriage 4, and in the illustrated example, the engaging groove 38b corresponds to horizontal traveling, and the engaging groove 38a.
a and 38c are formed so as to correspond to the case of traveling at 45 °. That is, in the steady rest mechanism 30, the locking arm 3 is locked by the shock absorber 31.
While pressing the locking roller 36 downward, the locking roller 36 is pressed against the engagement groove 38b of the cam 37, and the locking roller 36 and the cam 37 are engaged by the locking roller 36. A shake of the device 5 and the handling mechanism 6 is prevented. The engagement is disengaged by applying a load of a predetermined value or more.

As shown in FIG. 4, the cushion mechanism 40 includes a pair of air cushion dampers 41 arranged before and after the traveling vehicle 4 in the traveling direction, and an abutting member 43 such as a metal block provided corresponding thereto. Consists of and
The air cushion damper 41 is fixed to the support bracket 17, and the contact member 43 is fixed to the upper frame 18, respectively. Then, in the cushion mechanism 40, the handling mechanism 6 causes the traveling carriage 4 to move immediately after the traveling carriage 4 enters the slope portion from the horizontal portion of the monorail track.
When swung against, the rod 42 of the air cushion damper 41 collides with the contact member 43 as shown in FIG.
Due to this, the cushioning action of the air cushion damper 41 damps the swing of the handling mechanism 6.

As shown in FIG. 5, the leveling device 45 includes a pair of swing restraining arms 46 arranged before and after the traveling carriage 4 in the traveling direction, and these swing restraining arms 46.
And an operating mechanism for operating the.

Each of the swinging restraining arms 46 has a pressing roller 47 at its tip (lower end in the figure) and a support shaft 46a at its base (upper end in the figure). The support bracket 1 is mounted through this support shaft.
Each of the seven end portions is rotatably supported.

The actuating mechanism includes a motor 50 as a drive source, timing gears 52a and 53a and timing gears 52b and 53b rotatably supported by the support bracket 17, and the swinging restraining arm 46. It is composed of timing gears 54a and 54b fixed to the support shaft 46a. As shown in the figure, the timing gears 52a to 54a and 52b to 54b are arranged in parallel before and after the traveling vehicle 4 in the traveling direction, and are arranged such that adjacent gears mesh with each other.

The motor 50 corresponds to the support bracket 1
The gear 51 for driving transmission is attached to the output shaft of the gear 7, and the gear 51 meshes with the timing gear 52a.

Then, in the leveling device 45,
When the motor 50 is driven, its rotational driving force is transmitted to the swinging restraining arm 46 on one side (right side in FIG. 5) via the timing gears 52a to 54a, and also via the timing gears 52b to 54b. Is transmitted to the other side (the left side in FIG. 5) of the swing restraint arm 46, whereby each swing restraint arm 46 is rotated with respect to the support bracket 17 with each support shaft 46a as a fulcrum. There is. At this time, the rocking restraint arms 46 are adapted to rotate in mutually different directions. As the motor 50 is driven to rotate in the forward and reverse directions, the rocking restraint arms 46 are shown in solid lines in FIG. As shown in FIG. 5, the structure is configured to be rotationally displaced between an operating position that projects vertically downward from the support bracket 17 and a retracted position that is stored inside the support bracket 17 as shown by a two-dot chain line in FIG. .

Then, in a state in which each of the rocking and restraining arms 46 is held at the operating position in this way, the pressing roller 47 of each of the rocking and restraining arms 46 is pressed against the upper surface portion of the elevating device 5, and as a result, The swinging of the lifting device 5 and the handling mechanism 6 with respect to the traveling carriage 4 is restrained, and the handling mechanism 6 is forcibly maintained in a horizontal state with respect to the traveling carriage 4, while the swing restraining arms 46 described above are held. In the state where is held in the retracted position, the lifting device 5 and the handling mechanism 6 are allowed to swing with respect to the traveling carriage 4.

By the way, a detection piece 48 for detecting the operation of the horizontal maintaining device 45 is fixed to the support shaft 46a for supporting each of the swinging restraining arms 46, and for example, a photo sensor for detecting this. An operation detection sensor 49 including the above is attached to the support bracket 17, and the operation detection sensor 49 detects the detection piece 48 to detect the operation state of each rocking and restraining arm 46.

In the monorail type transporting device thus constructed, the control unit 11 is equipped with a control unit mainly composed of a microcomputer, and the transporting operation in the monorail type transporting device is integrally controlled by this control unit. It is supposed to be done.

In particular, with regard to the leveling device 45,
It is controlled to automatically operate in a certain section of the monorail track. Here, an example of the control is shown in FIG.
Will be described with reference to the flowchart of FIG.
At this time, as shown in FIG. 7, the traveling carriage 4 reaches the horizontal portion 1a from the climbing portion 1b of the monorail 1, and the horizontal portion 1a
The loading / unloading operation of the luggage is performed at the work station S provided at a predetermined position of the work station, and the control marks such as the operation command mark Pa, the work command mark Pb, and the retract command mark Pc provided near the work station S are run. The detection means (not shown) of the carriage 4 detects the mark, and a predetermined operation is performed based on the mark detection.

First, in the monorail type transfer device, while the traveling carriage 4 is traveling on the uphill portion 1b of the monorail 1, the horizontal maintaining device 45 is in a non-operating state, that is, each of the rocking detention arms. 46 is in the retracted position, which allows the lifting device 5 and the handling mechanism 6 to swing with respect to the traveling carriage 4, and the handling mechanism 6 is maintained horizontally as shown in the figure.

When the traveling vehicle 4 further travels and the operation command mark Pa is detected from the climbing portion 1b of the monorail 1 to the horizontal portion 1a, the horizontal maintaining device 45 is activated based on this detection. That is, each of the swing restraint arms 46 is rotationally displaced from the retracted position to the operating position, and the completion of the operation of each swing restraint arm 46 is determined (steps S1 and S2).

At this time, if one or both of the rocking and restraining arms 46 does not operate properly, specifically, the detecting pieces of the rocking and restraining arms 46 within a predetermined time from the start of the operation of the horizontal maintaining device 45. When 48 is not detected by the operation detection sensor 49 (NO in step S2), the process proceeds to step S10, and after the error is output here, the traveling of the traveling vehicle 4 is stopped (step S11).

On the other hand, when both rocking restraint arms 46 have properly operated (NO in step S2), the traveling carriage 4 continues to travel, and when the work command mark Pb is detected, it stops based on this detection. That is, the traveling carriage 4 is stopped at the work station S (step S3, step S
4). Then, in the work station S, loading / unloading work is performed while the handling mechanism 6 is being raised / lowered by the lifting / lowering device 5, and when the work is completed, the traveling carriage 4 is started to travel again (step S5). Step S6).

In this way, when the traveling carriage 4 starts traveling after the work at the work station S is completed and the retract command mark Pc is detected, the leveling device 45 is again actuated based on this detection, whereby the above described Each swing restraint arm 46 is rotationally displaced from the operating position to the retracted position, and it is determined whether each swing restraint arm 46 has been retracted (steps S7 and S8).

At this time, if one or both of the rocking and restraining arms 46 do not retreat properly, specifically, the detection pieces of the rocking and restraining arms 46 within a predetermined time from the start of the operation of the horizontal maintaining device 45. When the detection of the operation detection sensor 49 with respect to 48 is not canceled (NO in step S8), the process proceeds to step S10, and after an error is output here,
The traveling of the traveling carriage 4 is stopped (step S11).

On the other hand, when both swing restraining arms 46 are properly pivotally displaced to the retracted position (YE in step S8).
In S), the carriage 4 goes to the next work station.
Is continued and the process returns to step S1.

In the monorail type transporting device constructed as described above, the leveling device 45 allows the swinging of the handling mechanism 6 with respect to the traveling carriage 4 and the state in which it is forcibly blocked. Since the switching mechanism is switchable and the handling mechanism 6 is kept horizontal in this swinging prevention state, it is possible to more appropriately carry the load and unload the work.

That is, in the conventional monorail type transfer device of this type, it is possible to prevent unnecessary swinging of the handling mechanism with respect to the traveling carriage, but when loads are unevenly loaded in the handling mechanism, Due to the weight of the luggage, the handling mechanism is always inclined with respect to the traveling carriage, which may hinder the loading and unloading operation of the luggage at the work station or the like. However, according to the monorail type transporting apparatus of the above-mentioned embodiment, even if a load is unevenly loaded on the handling mechanism 6 and the elevating device 5 and the handling mechanism 6 are inclined with respect to the traveling carriage 5, the situation may occur. When the leveling device 45 is operated at a predetermined work station or the like, the swinging restraining arm 46 is pressed against the upper surface of the lifting device 5 as the swinging restraining arm 46 rotates, and the swing restraining arm 46 is pressed against the traveling carriage 4. Since the inclinations of the lifting device 5 and the handling mechanism 6 are forcibly corrected, the loading and unloading operation of the load can be performed while the handling mechanism is always kept horizontal, and the loading and unloading of the load is appropriately performed. be able to.

Moreover, as described above, each rocking restraining arm 4 is
6 in the operating position, each rocking restraining arm 4
Since the pressing roller 47 of 6 presses against the upper surface of the lifting device 5 to restrain the lifting device 5 and the handling mechanism 6 from swinging, for example, when loading and unloading heavy objects on the handling mechanism 6. Even if there is, it is possible to surely press the swing of the handling mechanism 6 to perform the loading / unloading work, and also in this respect, the loading / unloading work of the load can be performed more appropriately.

The horizontal maintaining device 4 in the above embodiment
5 is an embodiment of the horizontal maintenance device according to the present invention,
The specific configuration can be appropriately changed without departing from the scope of the present invention. For example, in the above-described embodiment, the horizontal maintaining device 45 and the pair of swing restraining arms 46 and the plurality of timing gears 52a to 56a, 52b that mesh with each other.
.About.56b and an actuating mechanism portion including the motor 50, the actuating mechanism portion may be configured by a combination of a gear and a chain member or a belt member that is wound around the gear. Further, in addition to the configuration in which the swinging restraining arm 46 is rotated by using the motor 50 as a driving source as in the embodiment, for example, an air cylinder is applied as a driving source, and air pressure suction / discharge to / from the air cylinder is switched. The swinging restraining arm 46 may be configured to advance or retreat in the vertical direction directly or indirectly via a gear or the like.

Further, the control method shown in the flowchart of FIG. 6 is also an example of the control method of the monorail type transfer apparatus, and the operation timing of the horizontal maintaining apparatus 45 can be changed appropriately. For example, in the control of the above-described embodiment, the operation command mark Pa and the retraction command mark Pc are provided in a certain section including the work station S, and the horizontal maintenance device 45 is operated based on the detection of these. Based on the detection of the command mark Pb, the horizontal maintenance device 45 may be controlled to operate immediately before the traveling carriage 4 is stopped at a predetermined work station S, or immediately after the travel carriage 4 is stopped, and immediately after the work at the work station S is completed. I do not care.

[0050]

As described above, according to the present invention, the swing restraining arm is provided, and in the state in which the swing restraining arm is held at the operating position, the load shifting mechanism is prevented from swinging with respect to the traveling carriage to transport the load. While the mechanism is kept horizontal, the load transfer mechanism is allowed to swing with respect to the traveling carriage while being held in the retracted position.Therefore, on the slope of the transport track, the swing restraint arm is held in the retracted position. The load transfer mechanism is allowed to swing, which allows the load transfer mechanism to be transported while being kept horizontal, while the load transfer mechanism can be held at a predetermined position on the transfer track, such as a loading / unloading place. The arm can be held in the actuated position, which forces the load transfer mechanism to remain horizontal. Therefore, it is possible to properly transport the cargo regardless of the slope or the horizontal portion of the transportation track, and it is possible to appropriately load and unload the cargo without being influenced by the deviation of the cargo to the cargo transfer mechanism.

At this time, the swinging restraining arm is provided on the traveling carriage so that it is brought into contact with a portion supporting the load transfer mechanism by projecting downward from the frame of the traveling carriage while being held at the operating position. On the other hand, if it is configured to be stored in the frame while being held in the retracted position, the swinging restraining arm comes into contact with a portion supporting the load transfer mechanism so that the load transfer mechanism swings. Movement is blocked,
By storing the swing restraint arm in the frame, the load transfer mechanism is allowed to swing.

Further, the swing restraint arms are provided in front of and behind the traveling direction of the traveling carriage, and are pivotally supported so as to be swingable with respect to the frame of the traveling carriage, and the front and rear swing restraining arms are interlocked. According to this structure, the swing restraint arms can be operated by the common drive source.

Further, if the swing restraint arm is controlled so as to be held in the operating position within a certain section including a predetermined working position on the transport track with respect to the traveling carriage, for example, a loading / unloading place of luggage, etc. It is possible to automatically prevent the load transfer mechanism from swinging or tilting in the loading and unloading operation of the load to be carried out properly and smoothly.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a monorail type transfer device to which a horizontal maintaining device according to the present invention is applied.

FIG. 2 is a cross-sectional view showing an example of a monorail type transportation device to which the horizontal maintenance device according to the present invention is applied.

3 is a view showing a steady rest mechanism as viewed in the direction of arrow A in FIG. 2. FIG.

FIG. 4 is a view showing a cushion mechanism as viewed in the direction of arrow B in FIG.

FIG. 5 is a front view showing an example of a horizontal maintenance device.

FIG. 6 is a flowchart showing an example of control of the horizontal maintenance device.

FIG. 7 is a supplementary diagram for explaining the above flowchart.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Monorail 4 Traveling trolley 5 Lifting device 6 Handling mechanism 17 Support bracket 18 Upper frame 45 Horizontal maintenance device 46 Swing restraint arm

Claims (4)

[Claims] 1. A transfer device provided with a traveling carriage that travels along an elevated conveying track and a load transfer mechanism that is swingably supported by the traveling carriage, and is displaceable between an operating position and a retracted position. And in the operating position,
While preventing the swinging of the load transfer mechanism with respect to the traveling carriage to maintain the load transporting mechanism horizontal, while allowing the swinging of the load transfer mechanism with respect to the traveling carriage in the retracted position. A horizontal maintenance device for a load transfer mechanism in a transfer device, comprising a detention arm and an actuating mechanism section for actuating the swinging detention arm. 2. The swing restraint arm is provided on the traveling carriage, and projects downward from a frame of the traveling carriage to support the load transfer mechanism in the operating position. The horizontal maintenance device for a load transfer mechanism in a transport device according to claim 1, wherein the horizontal maintenance device is stored in the frame while being in contact with the portion and in the retracted position. 3. The swing restraint arms are respectively provided in front of and behind the traveling direction of the traveling carriage, and pivotally supported on a frame of the traveling carriage so as to swing forward and backward. 3. The detention arm is interlocked with each other.
A horizontal maintenance device for a load transfer mechanism in the transfer device described. 4. A control means is provided for controlling the actuating mechanism section so that the swinging restraining arm is displaced to an actuating position within a certain section including a predetermined working position in a conveying track with respect to a traveling carriage. A horizontal maintenance device for a load transfer mechanism in a transport device according to any one of claims 1 to 3.