JP3690561B2 - Transport vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a plurality of wheels that can travel on a traveling rail, and a regulating member that engages with the traveling rail so as to regulate a position of the traveling rail in a lateral width direction of the vehicle body. The present invention relates to a transport vehicle in which at least a part thereof is configured as propulsion driving wheels driven by a driving device and is configured to be capable of traveling along the traveling rail.
[0002]
[Prior art]
The transport vehicle is a propulsion driving wheel driven by a driving device and is self-propelled along the traveling rail while the position in the vehicle body width direction with respect to the traveling rail is regulated by the regulating member. If the drive device is equipped with an electric drive motor and the drive motor cannot supply the necessary power, or if a failure such as a drive device failure occurs, the vehicle will run on its own. In this case, it is necessary to cause the transport vehicle to travel along the travel rail with a manual force such as a hand-held type.
And when making a conveyance vehicle drive | work with manual force at the time of the above trouble occurrence, it is made to drive | work with manual force in the state which contacted the driving wheel with the traveling rail conventionally.
[0003]
[Problems to be solved by the invention]
For this reason, the manual force required to run the transport vehicle becomes large, and there is a drawback that the transport vehicle cannot be easily traveled with a small manual force.
In other words, the drive device and the drive wheel are linked via a reduction gear or the like, and in order to force the drive wheel to rotate manually with a manual force and travel the carriage along the traveling rail, the drive wheel rotates. This is because it is necessary to forcibly move the drive device, and the drive device serves as resistance for traveling of the transport vehicle.
In order to solve this drawback, for example, an electric intermittent clutch is provided between the drive device and the drive wheel, and when the trouble occurs, the drive device and the drive wheel are disconnected, thereby reducing the size of the transport vehicle. It can be considered that the vehicle can be driven by manual force. In this case, a large and expensive clutch with a large transmission torque is provided so that the necessary propulsive force can be transmitted from the drive unit to the drive wheels. There are new disadvantages that must be made.
The present invention has been made in view of the above circumstances, and when a transport vehicle travels along a travel rail with a manual force when a trouble occurs, the transport vehicle can be easily traveled with a small manual force. And it aims at enabling it to aim at the simplification of a structure.
[0004]
[Means for Solving the Problems]
According to the first aspect of the present invention, when the auxiliary wheel of the idle type is moved up and down by manual operation and switched to a supporting operation state where the auxiliary wheel contacts the traveling rail when a trouble occurs, the traveling rail of the regulating member In the range where the engagement with the vehicle is maintained, that is, the position in the vehicle lateral direction relative to the traveling rail is regulated by the regulating member, the driving wheel for propulsion floats from the traveling rail and no trouble occurs. At the time of traveling, when the auxiliary wheel is switched to the non-supporting action state where the auxiliary wheel is lifted from the traveling rail, the driving wheel comes into contact with the traveling rail and can be driven by driving by the driving device.
Therefore, when the transport vehicle travels along the travel rail with manual force when trouble occurs, the drive wheel can be forced to travel on the travel rail with auxiliary wheels instead of the drive wheels. Since there is no need to rotate and the driving device does not become resistance to travel of the transport vehicle due to manual force, the transport vehicle can be traveled easily with less manual force than in the past.
In addition, since the auxiliary wheel that is brought into contact with the travel rail instead of the drive wheel when trouble occurs is simply provided using the restriction function of the restriction member, the configuration can be easily simplified.
Further, the carrier vehicle according to claim 1 is configured such that the bending / extension link is bent and extended between the bending state and the extending state by the operation handle that is operated to swing up and down, and the auxiliary wheel is set to the support action state and the non-support action state. Can be switched.
Therefore, it is easy to quickly switch between the supporting action state and the non-supporting action state as compared with the case where a screw advance mechanism or the like is used while reducing the operating force by the lever action of the operating handle.
In the transport vehicle according to the second aspect, as the auxiliary wheel is switched to the supporting action state, the vehicle body swings around the driven wheel on the other end side in the vehicle body front-rear direction, and the drive wheel on one end side in the vehicle body front-rear direction Surface.
Therefore, the drive wheels are provided on both ends in the longitudinal direction of the vehicle body, and the vehicle body is supported more stably by the driven wheels and auxiliary wheels than when the vehicle body is supported only by the auxiliary wheels when trouble occurs. Easy to drive reliably .
請 Motomeko 3 guided vehicle described, travel and in the longitudinal direction the installed running rail along the storage rack, by the lifting table drive lifting operations for load transfer, the article relative to storage rack You can enter and leave
[0005]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an article storage facility such as an automatic warehouse. This article storage facility includes two storage shelves A that are installed at an interval so that the directions for putting in and out the articles face each other, and the storage shelves A. A stacker crane C as an example of a transport vehicle according to the present invention that automatically travels in a work path B formed therebetween is provided, and each storage shelf A has a large number of article storage portions D arranged in parallel in the upper and lower stages. Yes.
[0006]
A single traveling rail 1 is installed in the work path B along the longitudinal direction of the storage shelf A, and an article loading / unloading instruction E is provided to the stacker crane C in the article loading / unloading section E installed on one end side of the work path B. An input controller E1 and a pair of loading platforms E2 are provided across the traveling rail 1, and the stacker crane C travels along the traveling rail 1 based on the loading / unloading command, and the loading platform E2 and the article storage unit It is configured as a loading / unloading transport vehicle that loads and unloads articles F placed on pallet P with D.
[0007]
As shown in FIG. 2, the stacker crane C guides a traveling carriage 2 traveling along the traveling rail 1 to a lifting carriage 3 as a lifting platform for loading and unloading the lifting carriage 3 so as to be movable up and down. A pair of front and rear support columns 4 to be supported is provided, and the lifting carriage 3 is provided with a fork device 5 for transferring articles.
[0008]
The lower end portion of each support column 4 is bolted to a support column fixing bracket 4a fixed to the traveling vehicle body 2, and the upper end portions of the support columns 4 are guided and supported along guide rails 6 installed above the work path. The upper frame 7 is connected.
[0009]
The elevating carriage 3 is suspended and supported by elevating chains 8 connected to the left and right sides thereof. The elevating chain 8 includes a guide sprocket 9 provided on the upper frame 7 and a guide sprocket 10 provided on one support column 4. And is connected to a winding drum 11 provided at one end of the traveling vehicle body 2.
Then, the take-up drum 11 is driven and rotated in the forward and reverse directions by the elevating electric motor M1 so that the elevating carriage 3 is driven up and down by the drawing and winding operation of the elevating chain 8.
[0010]
As shown in FIGS. 3 and 4, the traveling vehicle body 2 has two front and rear wheels 12 that can travel on the traveling rail 1, and the traveling rail 1 so as to regulate the position of the traveling rail 1 in the lateral width direction of the vehicle body. The supporting member is in contact with the traveling rail 1 by traveling up and down with respect to the traveling vehicle body 2 by the regulating member 13 provided at two places before and after engaging with the vehicle, the traveling drive device 14 provided with the traveling electric motor M2, and traveling. An auxiliary wheel lifting / lowering unit 16 having a freewheeling auxiliary wheel 15 that can be switched to an unsupported action state that is levitated from the rail 1 is provided, and further, current is collected from a power supply device installed on the floor surface side. A control device (not shown) for controlling the operation of the current collector and the stacker crane C is provided.
[0011]
Each of the regulating members 13 includes a pair of left and right wheels sandwiching the traveling rail 1 from the left and right sides near the wheel 12 and rolling around the vertical axis along the side surface of the stacker crane C as the vehicle travels. The lower idler roller 13a is provided.
In addition, a pair of left and right upper idle rollers 17 that roll around the vertical axis along the side surface of the stacker crane C as the stacker crane C travels are sandwiched between the upper rail 7 and the guide rail 6 from the left and right. It is provided at the front and rear ends.
[0012]
And the wheel of the one end side of the vehicle body front-back direction of the two wheels 12 is comprised by the drive wheel 12a for a propulsion driven with the drive device 14 for driving | running | working, and the wheel of the other end side of a vehicle body front-back direction is comprised. The stacker crane C is configured as a free-wheeling driven wheel 12b and is self-propelled along the traveling rail 1 by being driven by the traveling drive unit 14 while being prevented from falling by the upper idler roller 17 provided on the upper frame 7. It is configured freely.
[0013]
As shown in FIGS. 5 and 6, the auxiliary wheel lifting unit 16 is fixed to a fixing portion 18 provided on the front surface of the traveling vehicle body 2 on the side of the driving wheel 12 a, and the auxiliary wheel 15 is transverse axis X <b> 1 orthogonal to the traveling direction. A wheel support frame 20 that is rotatably supported around and a lifting operation tool 21 that lifts and lowers the auxiliary wheel 15 by manually moving the wheel support frame 20 up and down is assembled to a base frame 22. The frame 22 is provided with a base plate 23 for fixing to the fixing portion 18.
[0014]
The fixing portion 18 is formed with a dovetail guide groove 19 into which the base plate 23 is removably inserted from the lateral direction of the vehicle body. The base plate 23 fitted in the guide groove 19 is fixed with a bolt or the like. The auxiliary wheel lifting / lowering unit 16 is detachably fixed to the traveling vehicle body 2.
Therefore, the auxiliary wheel lifting / lowering unit 16 is removed from the traveling vehicle body 2 during normal traveling, and the auxiliary wheel lifting / lowering unit 16 is attached to the traveling vehicle body 2 when a trouble such as a power failure occurs where power cannot be supplied to the traveling electric motor M2. be able to.
[0015]
As shown in FIG. 7, the lifting / lowering operation tool 21 is operated to bend and extend into a bent state and an extended state by a manual operation handle 24 that is operated to swing up and down, and the operation handle 24 that swings up and down. A bending / extending link 25 and a slide shaft member 26 fixed to the upper surface of the wheel support frame 20 are provided. The bending / extending link 25 is capable of swinging a pair of upper and lower link members 25a, 25b around a horizontal axis X2 by a connecting pin 29. The base frame 22 is provided with a guide member 27 configured to be connected and guiding the slide movement of the slide shaft member 26 in the vertical direction.
[0016]
A pair of left and right brackets 28 are fixed to the base frame 22, and the operation handle 24 is supported by the bracket 28 so as to be swingable up and down around the horizontal axis X <b> 3, and of the upper link member 25 a of the pair of upper and lower link members. The upper end portion is connected to the bracket 28 so as to be swingable up and down around the horizontal axis X4, and the lower end portion of the lower link member 25b is connected to the upper end portion of the slide shaft member 26 so as to be swingable up and down around the horizontal axis X4. Yes.
[0017]
A connecting pin 29 of the bending / extending link 25 is inserted into the operation handle 24, and a pin insertion hole 30 having a diameter larger than the outer diameter of the connecting pin 29 is integrated as the operation handle 24 swings up and down. Is provided so as to swing.
Then, the bending / extension link 25 is bent and stretched in a bent state and an extended state by pushing and pulling the connecting pin 29 accompanying the swing of the pin insertion hole 30 by the operation handle 24, and the slide shaft member 26 is moved up and down together with the wheel support frame 20. The auxiliary wheel 15 is linked to the bending / extension link 25 so as to be adjusted up and down by bending and stretching.
[0018]
Then, the auxiliary wheel 15 is switched to the support operation state in the extended state of the bending / extending link 25, and the driving wheel 12a floats from the traveling rail 1 within a range in which the engagement of the restricting member 13 with the traveling rail 1 is maintained. In the refraction state of 25, the driving wheel 12a is brought into contact with the traveling rail 1 by switching to the non-supporting action state.
The operation handle 24 is provided with a fixing tool (not shown) for fixing the operation position of the operation handle 24 at the end position of the swing range so as to be switched between a fixed state and a fixed release state.
[0019]
Next, the raising / lowering operation with respect to the traveling vehicle body 2 of the auxiliary wheel 15 by the raising / lowering operation tool 21 is demonstrated.
FIG. 7 (a) shows a state in which the operation handle 24 is pushed down and the auxiliary wheel 15 is switched to the non-supporting state, and the connecting pin 29 is pulled out to the front side of the vehicle body, and the bending / extending link 25 is operated in the bending state. As a result, the slide shaft member 26 is slid upward together with the wheel support frame 20, and the auxiliary wheel 15 is levitated from the traveling rail 1.
[0020]
As the operating wheel 24 is pushed up from the supporting state where the auxiliary wheel 15 is lifted from the traveling rail 1, the connecting pin 29 is pushed toward the support column 4 and the slide shaft member 26 slides downward. Then, the auxiliary wheel 15 contacts the traveling rail 1.
[0021]
Then, when the auxiliary wheel 15 is in contact with the traveling rail 1 and the operation handle 24 is further pushed up to operate the bending / extension link 25 to be in the extended state, as shown in FIG. Then, the traveling vehicle body 2 is swung up and down with the driven wheel 12b as a fulcrum, the auxiliary wheel 15 is switched to the supporting action state as shown in FIG. The stacker crane C is lifted by a flying height H (about 1 mm in this embodiment), and the stacker crane C is supported on the traveling rail 1 by the driven wheel 12b and the auxiliary wheel 15.
[0022]
With the switch the auxiliary wheels 15 to support the action state, the vehicle body 2 so is UeYura movement in the fulcrum driven wheel 12b, the lower idle roller 13a which is provided in each of the regulating member 13 of the running rail 1 While sliding upwardly toward along the side, the flying height H of the drive wheel 12a is smaller than the engagement of the vertical direction relative to the running rail 1 by the lower idler roller 13a, the drive wheels 12a are regulating member It is levitated from the traveling rail 1 within a range in which the engagement of the 13 traveling rails 1 is maintained.
[0023]
Further, with the switching between the auxiliary wheels 15 to support the action state, the slide upward direction along the side surface of the upper idle roller 17 also guide rails 6 that sandwich the guide rail 6, the flying height of the drive wheels 12a H is smaller than the amount by which the upper free-rolling roller 17 is sandwiched in the vertical direction with respect to the guide rail 6, and the upper free-rolling roller 17 is maintained in a state where it can roll along the side surface of the guide rail 6.
[0024]
Therefore, when a trouble such as a power failure that cannot supply electric power to the traveling electric motor M2 occurs, the stacker crane C that is prevented from falling by the upper idler roller 17 can travel along the traveling rail 1 with a small manual force. it can.
[0025]
[Other Embodiments]
1. In the above embodiment, a transport vehicle that travels along a single travel rail with two wheels provided before and after the traveling direction is shown. However, with three or more wheels provided symmetrically before and after the traveling direction. It may be a transport vehicle that travels along a plurality of travel rails.
2. In the above embodiment, one of the two wheels that can freely travel on the traveling rail is configured as a driving wheel for propulsion driven by a driving device, but all of the plurality of wheels are configured as driving wheels for propulsion. It may be configured.
3. In the above embodiment, the transport vehicle provided with the driving device driven by the power supplied from the ground side such as the floor surface is shown, but the battery is mounted and driven by the power supplied from the battery. The conveyance vehicle provided with the drive device may be sufficient.
In this case, if a trouble occurs in which the battery is consumed and the drive device cannot be driven, the vehicle can be driven by the auxiliary wheel.
4). The regulating member that engages with the traveling rail so as to regulate the position in the vehicle body lateral direction with respect to the traveling rail of the transport vehicle may be a wheel for preventing the wheel from coming off integrally with the outer peripheral portion of the wheel .
[Brief description of the drawings]
FIG. 1 is a perspective view of an article storage facility. FIG. 2 is a partially omitted side view of a transport vehicle (stacker crane). FIG. 3 is a side view of an essential part of the transport vehicle (stacker crane). [Fig. 5] Side view of the main part [Fig. 6] Front view of the main part [Fig. 7] Enlarged side view of the main part [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Traveling rail 2 Car body 3 Lifting stand 12 Wheel 12a Drive wheel 12b Follower wheel 13 Restriction member 14 Drive device 15 Auxiliary wheel 24 Operation handle 25 Bending-extending link A Storage shelf F Article

Claims (3)

A plurality of wheels that can travel on the traveling rail; and a restricting member that engages with the traveling rail so as to restrict a position of the traveling rail in a lateral direction of the vehicle body, and at least one of the plurality of wheels. The part is configured as a propulsion driving wheel driven by a driving device, and is configured to be capable of self-propelling along the traveling rail,
A supporting action state in contact with the traveling rail so that the driving wheel is lifted from the traveling rail within a range in which engagement of the regulating member with the traveling rail is maintained by raising and lowering the vehicle body; A free-wheeling auxiliary wheel that is switched to a non-supporting action state that is levitated from the traveling rail so as to contact the traveling rail is provided in the vehicle body so as to be adjusted up and down by manual operation ,
A transport vehicle in which the auxiliary wheel is linked to a bending-extension link that is bent and extended in a bent state and an extended state by an operation handle that is vertically swung . A wheel on one end side in the vehicle longitudinal direction among the plurality of wheels is configured as a driving wheel for propulsion driven by the drive device, and a wheel on the other end side in the vehicle longitudinal direction is a freely rotatable slave. Configured as a driving wheel,
The transport vehicle according to claim 1, wherein the auxiliary wheel is provided so as to swing the vehicle body up and down with the driven wheel as a fulcrum. A loading / unloading platform that can be driven up and down freely, and travels along the traveling rail installed along the longitudinal direction of the storage shelf, for loading and unloading articles to and from the storage shelf. The conveyance vehicle of Claim 1 or 2 comprised as a conveyance vehicle.

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