JP3173468B2 - Travel belt tension adjusting device, traveling trolley system and automatic warehouse - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension adjustment of a traveling belt for adjusting the tension of a traveling belt stretched along a traveling track to drive a traveling vehicle such as a stacker crane in an automatic warehouse. The present invention relates to an apparatus, a traveling trolley system, and an automatic warehouse.

[0002]

2. Description of the Related Art Conventionally, a traveling belt stretched along a traveling track with both ends fixed to a floor or the like is attached to a pulley or the like which is rotationally driven by a traveling drive source such as a motor provided on a vehicle body. 2. Description of the Related Art A traveling vehicle of a belt traveling drive system is known, in which the traveling vehicle is driven along a traveling belt by driving a traveling driving source to rotate a pulley.

[0003] In the construction of installing a traveling vehicle of this type, a traveling belt (toothed belt) is wound around a pulley (toothed pulley) constituting a traveling drive system of the traveling vehicle, and then the end of the traveling belt is driven. It is necessary to fix the portion in a state where an appropriate tension is applied to the traveling belt.

Conventionally, a belt tension adjusting device as shown in FIG. 8 has been known, for example. The belt 71 is a toothed belt, and a tooth 71a and a tooth 72a are provided between a support plate 72 having teeth 72a meshed with the tooth 71a and a flat plate 73.
Are fixed in a state where they are sandwiched by using a plurality of bolts 74 and nuts 75 in a state where they are engaged with each other. A connecting member 76 is sandwiched between the support plate 72 and the flat plate 73 at an end position using a bolt 77 and a nut 78, and the connecting member 76 is connected to one end of an end bolt 79 so as to be rotatable about the axis. ing. The end bolt 79 is screwed to the base 80, and the belt 81 is
Can be positioned in the longitudinal direction. By changing the screwing position of the end bolt 79 to the base 80, the tension of the belt 71 is adjusted.

[0005]

By the way, in the tension adjusting mechanism shown in FIG. 8, since the adjustment allowance for adjusting the tension of the belt 71 is determined by the length of the end bolt 79, the length of the end bolt 79 is required to be adjusted. It is necessary to make the length suitable for the generation. However, the traveling route of the traveling cart is several tens of meters or more.
It extends to 100m and is several tens of cm as a belt adjustment allowance
(For example, 30 to 50 cm) is required. Therefore, when the tension adjusting device of FIG. 8 is used to adjust the tension of the traveling belt of the traveling vehicle, if the lengths of the support portions such as the support plate 72 and the flat plate 73 are adjusted, the length of the tension adjustment mechanism becomes 50.
It is about 70 cm or more, and in some cases, about 100 cm.

For example, when a belt traveling drive system is adopted for a stacker crane in an automatic warehouse, if the tension adjusting mechanism is long, the tension adjusting mechanism starts from the end of the traveling rail laid on the floor in the warehouse. Layout problems, such as protruding considerably, arise. Further, if the tension adjusting mechanism is to be housed in the automatic warehouse, there is a problem that the operable area of the stacker crane becomes narrow due to securing the installation space for the tension adjusting mechanism. For this reason, there has been a demand for a tension adjusting mechanism capable of reducing the length of the traveling belt in the longitudinal direction even if the traveling path is long.

In the tension adjusting mechanism shown in FIG. 8, the end bolt 79 is designed to have a necessary minimum length in accordance with the length of the traveling belt in order to make the size as short as possible. For this reason, there is a problem that it is difficult to share the tension adjusting mechanism between automatic warehouses or transport vehicles having different running belt lengths.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a first object of the present invention is to provide a tension adjusting device installed at an end portion of a running belt, the size of which is small in the longitudinal direction of the belt. The present invention provides a traveling belt tension adjusting device, a traveling trolley system, and an automatic warehouse. A second object is to simplify the tension adjustment work up to fine adjustment of the running belt.

[0009]

The first object and the second object are provided .
In order to achieve the above object , the invention according to claim 1 is a tension adjusting device that adjusts the tension of a traveling belt stretched along a track to drive a traveling vehicle, wherein the tension adjusting device adjusts the tension of the traveling belt. A drum for fixing the end portion and winding, allowing rotation of the running belt of the drum in the winding direction,
And a reverse rotation restricting mechanism for restricting rotation of the traveling belt in the loosening direction, and fixing the drum to the floor surface.
And a fixed position of the drum with respect to the base.
A screw adjusting mechanism for adjusting the position of the row belt in the longitudinal direction .

[0010]

[0011]

[0012] The invention according to claim 2, in have your <br/> to claim 1, the rotation axis of the drum to claim 3 in which the engagement portions for engaging the operating lever is provided In the invention described in claim 1, in claim 1 or 2 , the running belt is a toothed belt, and a flat surface is formed on a winding surface of the drum, and the tooth surface is outside the flat surface. The running belt is configured to be fixed in a state of being sandwiched between the running belt and the flat surface by a support plate having teeth meshing with the tooth surface.

According to a fourth aspect of the present invention, the traveling bogie system includes the tension adjusting device according to any one of the first to third aspects, and one end of the drum of the tension adjusting device. The vehicle includes a fixed traveling belt and a traveling vehicle around which the traveling belt is wound around a pulley of a traveling drive source.

According to a fifth aspect of the present invention, in the traveling vehicle system according to the fourth aspect , the stacker crane as the traveling vehicle is wound around a pulley of a traveling drive source, and one end is wound around the drum. A belt traveling drive type stacker crane system that travels with the traveling belt adjusted in tension, wherein the automatic warehouse is provided with the stacker crane system.

(Operation) According to the first aspect of the present invention,
By tensioning the traveling belt for driving the traveling cart by winding the traveling belt around the drum by rotating the drum to which the end is fixed, the traveling belt is tensioned. Then, in this state, the rotation of the drum in the loosening direction of the traveling belt is regulated by the rotation stopping mechanism, whereby the tension of the traveling belt is maintained. Even if a large (long) adjustment margin is required for the running belt, since the winding belt is used to wind the running belt around the drum, the size of the tension adjusting device is substantially determined by the diameter of the drum.

Further, by reversing regulating mechanism, the rotation of the drum is allowed in the winding direction of the running belt, it is regulated in the loosening direction. Therefore, the tension is adjusted by simply rotating the drum in the winding direction until an appropriate tension is applied to the traveling belt.

Further , after adjusting the tension of the traveling belt by rotating the drum on the base fixed to the floor, the screw adjusting mechanism is operated to move the drum relative to the base in the longitudinal direction of the traveling belt. The adjustment enables fine adjustment of the tension of the running belt. For example, even if the rotation angle at which the rotation of the drum can be restricted by a rotation stopping mechanism (for example, a lock pin) or a reverse rotation restricting mechanism (a ratchet mechanism) cannot be adjusted only at the level of the coarse adjustment of the tension of the traveling belt. By adjusting the position of the drum with respect to the base by the screw adjusting mechanism, it is possible to finely adjust the tension of the traveling belt.

According to the second aspect of the present invention, the tension of the traveling belt is adjusted by engaging the operating lever with the engaging portion of the rotating shaft of the drum and rotating the operating lever. Since the operation lever is detachable, the tension adjusting device in a normal state becomes compact.

According to the third aspect of the present invention, the traveling belt has the tooth surface facing the flat surface formed on the winding surface of the drum, and the supporting plate has teeth engaged with the tooth surface. And is fixed in a state of being sandwiched between the flat surface. The end of the running belt is fixed to the winding surface of the drum because the end is flat, so the end is easy to fix.In addition, the running belt is connected to the support plate and the flat surface in a state where the tooth surfaces and the teeth are meshed. Because it is sandwiched between, it is firmly fixed to the drum.

According to the fourth aspect of the present invention, the tension of the traveling belt wound around the pulley of the traveling drive source of the traveling carriage is such that the end of the traveling belt is as described in any one of the first to third aspects. It is adjusted by being wound on the drum of the tension adjusting device. Even if the adjustment allowance required for the running belt becomes long due to the long running track, the size of the tension adjustment device is almost determined by the diameter of the drum and is hardly affected by the length of the adjustment allowance. It becomes shorter in the longitudinal direction. Therefore, the installation space of the tension adjusting device at the end of the running belt is shortened in the longitudinal direction of the running belt.

According to the fifth aspect of the present invention, the size of the tension adjusting device installed for adjusting the tension at the end of the traveling belt of the stacker crane provided in the warehouse of the automatic warehouse is adjusted to the traveling size. In the longitudinal direction of the belt.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 2 shows an automatic warehouse. The automatic warehouse 1 is used in a clean room.
A plurality of fan filter units 3 and filters 4 are provided on both sides of the warehouse (building) 2. The fan filter unit 3 sends air into the warehouse 2 by a fan (not shown), and the air is exhausted from the warehouse 2 through the filter 4 to keep the interior of the warehouse 2 clean.

Inside the warehouse 2, a pair of shelves 2a is formed on both left and right sides of the passage 5 therebetween. In the passage 5, a traveling rail 6 as a track is laid on the floor surface, and a guide rail 7 is erected on the ceiling side. A stacker crane 8 as a traveling vehicle is provided on the traveling rail 6, and an upper end portion thereof is supported by the guide rail 8.

The stacker crane 8 is driven to travel by a belt drive system, and the traveling belt 9 extends along the traveling rail 6. The traveling belt 9 has entered the inside of the main body 10 of the stacker crane 8. The traveling belt 9 has both ends fixed to the floor surface, and a tension adjusting device 11 for adjusting the tension of the traveling belt 9 is installed at one end of the traveling rail 7.

As shown in FIG. 3, the stacker crane 8
A carriage 13 having a pair of front and rear traveling wheels 12 and a carriage 1
A mast 14 fixedly mounted on the side of the mast 3;
A carriage 15 that moves up and down along the mast 14. A transfer device 17 having a multi-stage fork 16 is provided on the upper surface of the carriage 15. The transfer device 17 moves to and from the shelf 2a by sliding the fork 16 in the left-right direction (longitudinal direction). Stacker crane 8
Are two sets of guide rollers 1 provided before and after the traveling platform 13
8 sandwiches the traveling rail 6 and two sets (four in total) of guide rollers 19 provided at the upper end of the mast 14 sandwich the guide rail 7, thereby improving the stability in the left-right direction (lateral direction). Is secured.

Main body 1 provided on both lower sides of mast 14
Various components such as a traveling drive system and a lifting drive system are built in the unit 0. The main body 10 is provided with a traveling motor 20 and a lifting / lowering motor 21 as traveling driving sources. A drive pulley (toothed pulley) 22 as a pulley is fitted on the drive shaft of the traveling motor 20. The traveling belt 9 is formed of a toothed belt, and is guided by a pair of pulleys (an idler formed of a toothed pulley) 23 so as to be driven by a driving pulley 22.
In a state of being wound around. When the traveling motor 20 is driven in one of the forward and reverse directions, its winding position (engagement position) with respect to the traveling belt 9 is sequentially moved in one direction by the rotation of the driving pulley 22, and the stacker crane 8 is moved back and forth. The vehicle travels along the traveling rail 6 in any one direction. The carriage 15 is moved up and down along the mast 14 by driving the elevating motor 21.

Next, the structure of the tension adjusting device 11 is shown in FIG.
This will be described with reference to FIGS. As shown in FIGS. 1 and 4 to 6, the tension adjusting device 11 includes a base 31.
And a main body 32. The base 31 is fixed to the floor by four bolts 33 that have been inserted.
A guide frame 34 is welded to the upper surface of the base 31.

The main body 32 has a bottom plate 35 sized to be slidable in the longitudinal direction in the guide frame 34 of the base 31.
Two support plates 36 extend upward from the upper surface of the bottom plate 35 while maintaining a predetermined interval, and a drum 37 is rotatably mounted between the two support plates 36. A gear (ratchet gear) 38 is fixed to the side of the drum 37 so as to be integrally rotatable.
The gear 38 and the locking claw 39 constitute a ratchet mechanism 40 as a rotation stopping mechanism and a reverse rotation restricting mechanism. As shown in FIG. 1, the drum 37 is for winding the end portion of the running belt 9, and the extending direction of the running belt 9 matches the longitudinal direction of the tension adjusting device 11.

The bottom plate 35 is formed with four long holes 35a, and the main body 32 is fixed to the base 31 by four bolts 41 inserted into each long hole 35a. Bolt 41
When the is loosened, the main body 32 can slide in the longitudinal direction with respect to the base 31.

A screw adjusting mechanism 4 for adjusting the position of the main body 32 with respect to the base 31 is provided at the rear of the tension adjusting device 11.
2 are provided. The screw adjusting mechanism 42 includes a plate portion 34a extending in the width direction and forming a rear portion of the guide frame 34, and a plate portion 4 fixed to a rear end of the bottom plate 35 in parallel with the plate portion 34a.
3, a bolt 44 penetrating the plate portion 34a and screwed to the plate portion 43, and two nuts 45 and 46 screwed to the bolt 44 between the plate portions 34a and 43. You.
The rotation of the bolt 44 is prevented by abutting the two nuts 45, 46 on the opposing surfaces of the plate portions 34a, 43. By rotating the bolt 44 with the bolt 41 loosened and the nut 46 separated from the plate portion 43, the position of the main body 32 with respect to the base 31 is adjusted in the front-rear direction (the longitudinal direction of the running belt 9). You.

As shown in FIGS. 1, 4 and 6, the drum 3
The rotation shaft 47 fixed to the shaft center of the support plate 7 has two support plates 3.
6, and protrudes outward by a predetermined length, and an engaging portion 47a is formed at a tip end thereof. The engagement portion 47a has a shape to which the operation lever 48 can be fitted. As shown in FIG. 4, the rotary shaft 47 has an engagement portion 47a at a portion excluding both ends.
The step becomes smaller gradually toward the side, and a step is formed. The rotation shaft 47 is inserted through the circular hole 36a of the one support plate 36,
The disk is assembled by penetrating the engaging portion 47a on the distal end side into the hole 36b of the other support plate 36, and is assembled to the support plate 36 with a plurality of bolts 49 so as to close the hole 36a. The base end is supported by a concave portion (not shown) on the inner surface side of 50.

The base end of the locking claw 39 is fixed to the collar 51, and both ends of the shaft 52 inserted through the collar 51 are supported by two support plates 36. The two bolts 53 located above the locking claw 39 regulate the position of the locking claw 39 so that the locking of the locking claw 39 with respect to the gear 38 is not released after the tension adjusting operation of the traveling belt 9 is completed. Therefore, it is attached to the support plate 36. As shown in FIGS. 5 and 7, the end of the traveling belt 9 is fixed to the drum 37 on a flat surface 37 a in which the circumference of the winding surface is partially cut. The running belt 9 is arranged in a direction in which the back surface (the surface without teeth) abuts on the flat surface 37a (the direction in which the surface on the tooth side is the lower surface), and two plates 54 serving as support plates are arranged outside the belt. Are fixed to the drum 37 by bolts 55. Teeth 54a meshing with the teeth 9a are formed on the entire surface of the plate 54 on the side in contact with the traveling belt 9. The running belt 9 is sandwiched between the plate 54 and the flat surface 37a with the teeth 9a and the teeth 54a meshed. The running belt 9 is wound in a direction extending from below the drum 37.

Next, the operation of the tension adjusting device 11 will be described. In the operation of assembling the stacker crane 8, the traveling belt 9 is mounted on each of the pulleys 22 and 23 of the stacker crane 8, and the end of the traveling belt 9 is fixed to the drum 37. That is, the running belt 9 is sandwiched between the flat surface 37a of the drum 37 and the plate 54 while the teeth 9a and the teeth 54a are engaged with each other, and the plate 54 is fixed to the drum 37 using two bolts 55. Since the running belt 9 is fixed to the flat surface 37a of the winding surface of the drum 37, this fixing work is easy. Further, the running belt 9 is firmly fixed to the drum 37 by the engagement of the teeth 9a and the teeth 54a.

When adjusting the tension of the traveling belt 9, the main body 32 is temporarily fixed to the base 31. That is, the bolt 41 is loosened so that the bottom plate 35 can move with respect to the base 31. The base 31 is fixed to the floor in advance by bolts 33.

Next, the operating lever 48 is fitted to the engaging portion 47a of the rotating shaft 47. Then, the operation lever 48 is operated to rotate the drum 37 in the winding direction, and the operation of the operation lever 48 is stopped when an appropriate tension is applied to the traveling belt 9. The drum 37 does not rotate in the loosening direction due to the engagement of the locking claw 39 with the gear 38, and the tension of the traveling belt 9 is maintained. This completes the rough adjustment of the traveling belt 9.

Next, the tension of the running belt 9 is finely adjusted using the screw adjusting mechanism 42. Therefore, the tension can be finely adjusted at a level finer than the pitch of the teeth of the gear 38. For example, even if the traveling track distance of the stacker crane 8 is several tens of meters (for example, 20 to 50 m) and the adjustment allowance is several tens of cm (for example, about 30 to 50 cm), the drum 37 can be used.
Since the length of the traveling belt 9 that can be wound around becomes the adjustment allowance, it is possible to cope sufficiently. In addition, since the adjustment allowance can be prepared longer with some allowance, the work is easy. For example, about 1 meter can be secured as an adjustment fee. Therefore, it can be used firstly for any long automatic warehouse that needs to secure a very long running track distance. In addition, the present invention can be applied not only to the automatic warehouse but also to other belt-driven driving vehicles, even if the traveling distance range is long.

The running belt 9 is provided so as to crawl near the floor. However, since the running belt 9 extends from the lower side of the drum 37, the running belt 9 runs very close to the tension adjusting device 11. It becomes possible to make it an area. On the other hand, if the running belt 9 is wound from the upper side of the drum 37, the running belt 9
Since the area until the vehicle becomes almost parallel to the floor cannot be defined as the traveling area, the traveling area must be relatively short.

As described in detail above, according to this embodiment, the following effects can be obtained. (1) Since the traveling belt 9 for the adjustment allowance is wound around the drum 37 having the ratchet mechanism 40, even when the traveling belt 9 is long and the adjustment allowance is long, the length of the traveling belt 9 is sufficient. The size of the tension adjusting device 11 can be reduced.

(2) The fine adjustment of the tension of the traveling belt 9 can be performed by the screw adjusting mechanism 42 for finely moving the main body 32 with respect to the base 31. Therefore, the rotation of the drum 37 causes the gear 38 of the ratchet mechanism 40 to rotate. After roughly adjusting the tension to the roughness of the tooth pitch, the tension of the traveling belt 9 can be finely adjusted by the screw adjustment mechanism 42. For this reason, the operation of adjusting the tension of the traveling belt 9 is simple. On the other hand, the tension adjusting mechanism of FIG. 8 described in the related art adjusts the tension of the traveling belt by the screw adjusting mechanism.
When the amount of pull-in of the running belt is large, the tension can only be pulled in at a fine adjustment level in proportion to the amount of operation, so that the adjustment operation is very troublesome.

(3) The operation lever 48 is removable.
Normally, since the operation lever 48 can be removed, the tension adjusting device 11 becomes compact. (4) Since the running belt 9 extends from the lower side of the drum 37, in a configuration in which the running belt 9 is stretched so as to crawl near the floor on which the tension adjusting device 11 is installed, the running area is tensioned. It is possible to secure as long as possible near the installation position of the adjustment device 11.

(5) Flat surface 3 on the winding surface of drum 37
7a is formed, and the running belt 9 is sandwiched between the flat surface 37a and the plate 54 in a state where the teeth 9a and the teeth 54a are engaged with each other and fixed by the bolt 55.
The running belt 9 can be firmly fixed to the drum 37. Further, the tension adjusting device 11 can be shared by merely exchanging the plate 54 even between different types of teeth having different shapes and pitches of the running belt 9.

(6) The automatic warehouse 1 in which the length of the adjustment allowance required for the traveling belt 9 is different because the traveling track distance is different.
In between, the tension adjusting device 11 can be shared. Further, the tension adjusting device 11 can be shared not only between the automatic warehouses 1 but also between the automatic warehouse 1 and the transport vehicles, and between the transport vehicles, as long as the width of the traveling belt 9 is the same.

Note that the embodiment is not limited to the above, and may be implemented, for example, as follows. ○ The screw adjustment mechanism 42 must be eliminated. There is no problem as long as the adjustment roughness of about the pitch level of the teeth of the gear 38 of the ratchet mechanism 40 is sufficient. Ratchet mechanism 4
It is also possible to make the pitch level of the teeth of the 0 gear 38 fine. Further, instead of the ratchet mechanism in which the roughness of the tension adjustment is determined by the pitch of the teeth, a known reverse rotation preventing mechanism capable of continuously adjusting the winding amount of the belt may be adopted.

The mechanism for regulating the rotation of the drum 37 in the loosening direction is not limited to the ratchet mechanism. For example, a mechanism for stopping rotation of the drum with a lock pin may be employed.
Even if this mechanism is adopted, the winding allowance of the drum becomes an adjustment allowance, so that the size of the tension adjusting device can be reduced.

The flat surface may not be formed on the drum. In this case, the end of the running belt is fixed to the circumferential surface of the drum. ○ The running belt may be extended from the upper side of the drum.

○ The traveling trajectory is relatively short (for example, 10 m
Less) The tension adjusting device 11 may be employed in the traveling vehicle. In this case, the tension adjustment operation is simplified. ○ The traveling trolley is not limited to the stacker crane. For example, in a belt traveling drive type transport vehicle provided in a factory for transporting loads, the tension adjusting device 11 may be used for adjusting the tension of the traveling belt. In addition, it can be adopted as a tension adjusting device for a traveling carriage of a belt traveling drive system.

The operation lever may be fixed to the rotating shaft of the drum. A mechanism may be provided on the drum to adjust the belt winding width, so that the versatility may be increased so that the belt can be shared between running belts having different belt widths.

The traveling belt targeted by the tension adjusting device is not limited to the toothed belt. Technical ideas (inventions) other than the claims that can be grasped from the embodiment and other examples,
The effect is described below.

[0049]

( 1 ) In claim 1 , the reverse rotation restricting mechanism is a ratchet mechanism. According to this configuration, after coarsely adjusting the tension at the pitch level of the gear teeth of the ratchet mechanism, fine adjustment of the tension can be performed by the screw adjustment mechanism.

( 2 ) In claim 4 , the traveling vehicle is a carrier vehicle. According to this configuration, the traveling orbital distance of the transport vehicle is usually considerably long, and the adjustment allowance of the traveling belt is required to be long. However, the tension adjusting device can be downsized (shorted) for the length of the traveling belt. . The stacker crane is included in the transport vehicle.

[0052] (3) Oite to claim 1, includes an operation lever for rotating the drum. According to this configuration, the drum can be operated with a light force by operating the operation lever.

( 4 ) In the invention according to any one of claims 1 to 3 , the traveling belt is wound around the drum in a direction extending from below. According to this configuration, in a configuration in which the traveling belt is stretched near the floor, even if the tension adjusting device is installed on the floor, a long traveling area can be secured near the drum.

[0054]

As described in detail above, claims 1 to 3 are described.
According to the invention described in (1), the adjustment allowance of the traveling belt is wound around the drum, so that the length of the tension adjusting device in the longitudinal direction of the belt can be shortened for the length of the traveling belt.

According to the first aspect of the present invention, the reverse rotation of the drum is restricted at the rotation position where the drum is rotated in the winding direction, and the tension at that time is maintained, so that the drum is moved in the winding direction. The tension adjustment operation can be easily performed simply by rotating.

[0056] Also, when the tensioning traveling belt, a coarse adjustment by rotating operation of the drum, so that can be a fine adjustment by the operation of the screw adjustment mechanism, the task of adjusting the tension of the traveling belt to the level of the fine adjustment Can be simplified.

According to the second aspect of the present invention, since the operation lever is detachable, the drum can be rotated with a small operation force by using the operation lever at the time of adjusting the tension. Usually, the tension is removed by removing the operation lever. The adjusting device can be made compact.

According to the third aspect of the present invention, the end of the running belt is held between the flat surface formed on the winding surface of the drum and the support plate in a state in which the end portion of the running belt meshes with the teeth of the support plate. Therefore, the running belt can be easily fixed to the winding surface of the drum, and can be fixed firmly.

According to the fourth aspect of the present invention, the size of the tension adjusting device installed at the end of the running belt in the longitudinal direction of the belt can be reduced to the length of the running belt. In addition, the tension adjusting device is not so obstructive.

According to the fifth aspect of the present invention, the size of the tension adjusting device installed at the end of the traveling belt for driving the stacker crane is shortened, so that the layout design of the automatic warehouse has a margin. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tension adjusting device according to an embodiment.

FIG. 2 is a partially broken perspective view showing an automatic warehouse.

FIG. 3 is a perspective view of a stacker crane.

FIG. 4 is a plan view of the tension adjusting device.

FIG. 5 is a side sectional view of the same.

FIG. 6 is also a rear view.

FIG. 7 is a side sectional view of a drum.

FIG. 8 is a side view of a tension adjusting mechanism according to the related art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Automatic warehouse, 2 ... Warehouse, 6 ... Running rail as track, 8 ... Stacker crane as running trolley, 9 ... Running belt, 9a ... Teeth, 11 ... Tension adjusting device, 20 ... Running driving source Running motor, 22: drive pulley as pulley, 31: base, 32: main body, 37: drum, 3
7a: flat surface, 40: ratchet mechanism as rotation stopping mechanism and reverse rotation restricting mechanism, 42: screw adjusting mechanism, 47
... Rotating shaft, 47a ... engaging part, 48 ... operating lever, 54 ...
Plate as support plate, 54a ... teeth.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65G 1/00-1/20 B66F 9/07

Claims (5)

(57) [Claims] 1. A tension adjusting device for adjusting a tension of a traveling belt stretched along a track to drive a traveling vehicle, wherein a drum for fixing and winding an end of the traveling belt is provided. Rotation of the drum in the winding direction of the traveling belt is permitted.
And restricts rotation of the running belt in the loosening direction.
A reverse rotation regulating mechanism , a base for fixing the drum to the floor, and a fixing position of the drum with respect to the base,
A tension adjusting device for a traveling belt, comprising a screw adjusting mechanism for adjusting a position in a longitudinal direction . 2. An operation lever is engaged with a rotating shaft of the drum.
Tension adjusting device of the driving belt according to claim 1 engaging portion for engagement is that provided. 3. The running belt is a toothed belt.
Te, flat surface is formed on the winding surface of the drum, the hula
The running belt with the tooth surface outside with respect to the cut surface,
The flat plate is provided by a support plate having teeth meshing with the tooth surface.
The tension adjusting device for a traveling belt according to claim 1 or 2, wherein the tension adjusting device is configured to be fixed while being sandwiched between the surface and the surface . 4. The method according to claim 1, wherein:
The tension adjusting device and the drag of the tension adjusting device.
A traveling belt having one end fixed to the
Travel platform where the belt is wound around the pulley of the travel drive source
A traveling trolley system equipped with a car. 5. The traveling trolley system according to claim 4.
Is driven by a stacker crane as the traveling cart
Wrapped around the source pulley and
The running belt whose end is wound and tension is adjusted
Belt traveling drive type stacker crane system
The stacker crane system.
Moving warehouse.