JPH1120678A - Chain driving equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make whole structure simple and cheap and to easily adjust tension. SOLUTION: This equipment is constituted in such a way that a fixed machine casing 51 is rotatably provided with a pair of ring bodies 55 and 58 in a given path direction through ring body shafts 53 and 57, and a rotation transmitting body 59, whose external face can freely engage with a chain 40, is arranged between the ring bodies 55 and 58. One of the ring body shafts is interlockedly connected to a rotation driving device through the rotation driving shaft 57, and a tension adjusting means 62 for the rotation transmitting body 59 is provided in the machine casing 51. In this case, the tension of the rotation transmitting body 59 between the ring bodies 55 and 58 can suitably be adjusted by the tension adjusting means 62 so that if the rotation transmitting body 59 is extended as it is used, the tension of the rotation transmitting body 59 can be adjusted by adjusting the tension adjusting means 62.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain drive equipment used for driving a chain conveyor for transporting a vehicle body on a fixed path on a ceiling side, for example, in an automobile assembly plant.

[0002]

2. Description of the Related Art Conventionally, as this kind of chain drive equipment, for example, a structure as disclosed in Japanese Patent Application Laid-Open No. 7-47957 is provided. That is, a trolley guide rail for guiding the conveyor chain hanging trolley and a movable frame supported and guided by the fixed frame side are provided on the fixed frame side, and the movable frame is urged by a spring. ing.

[0003] A motor is mounted on the movable frame, and the motor is equipped with a speed reducer, and a drive tooth wheel is provided on an output shaft projecting downward from the speed reducer. A bearing member is mounted on the movable frame side at a position distant from the driving tooth wheel so as to be freely adjustable, and the idle wheel is supported by the bearing member. A track chain is provided between the two teeth, and the outer surface of the track chain is engaged with the conveyor chain. The movable frame is provided with a chain guide for slidingly guiding the inner surface of the caterpillar chain.

According to such a conventional configuration, by driving the motor, the driving tooth wheels and the like are rotated, and the caterpillar chain is rotationally moved, the inner surface is slidably guided by the chain guide, and the outer surface is engaged with the conveyor chain. The caterpillar chain is moved integrally with the conveyor chain, and a moving force is applied to the conveyor chain. When an impact force is generated on the side of the conveyor chain, the impact is absorbed by the movable frame moving against the urging force of the spring.

[0005]

However, according to the above-described conventional structure, when the caterpillar chain provided between the two tooth rings is long, for example, engagement with the conveyor chain is not performed smoothly. For this purpose, for example, the other gear wheel may be moved closer to or away from one gear wheel. Become. In addition, since the caterpillar chain is in a free state between the two tooth rings and on the side opposite to the conveyor chain, for example, when the caterpillar chain elongates due to use over time, the caterpillar chain swings. Noise is generated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a chain drive facility which can simplify the entire structure, can be inexpensive, and can easily adjust the tension.

[0007]

According to the present invention, there is provided a chain driving apparatus for applying a moving force to a chain moved on a fixed path. In the fixed machine frame, a pair of wheels are provided rotatably via respective wheel shafts in the direction of a fixed path, and the outer surface of the chain is connected to the chain between the wheels. An adjustable rotary transmission is provided, one of the wheel shafts is a rotary drive shaft, a rotary drive device is interlocked to this rotary drive shaft, and a tension adjusting means for the rotary transmission is provided on the machine frame side. It is characterized by being provided.

Therefore, according to the first aspect of the present invention, the tension of the rotary transmission between the two wheel bodies can be suitably adjusted by the tension adjusting means. Then, when the rotary transmission body elongates with the use progress, the tension of the rotary transmission body can be adjusted by adjusting the tension adjusting means.

According to a second aspect of the present invention, there is provided a chain drive device according to the first aspect, wherein the tension adjusting means includes a pair of guides for slidingly guiding the inner surface of the rotary transmission between the two wheel bodies. And a movement adjusting tool for individually moving these guide bodies in directions approaching and separating from each other.

Therefore, according to the second aspect of the present invention, the position of the guide member on the chain side can be adjusted in the approaching / separating direction by operating one of the movement adjusting tools, and the chain can be connected to the chain by operating the other moving adjusting tool. By adjusting the position of the distant guide body in the direction of approaching / separating, the tension of the rotary transmission can be adjusted. Then, when the rotary transmission body elongates as the use progresses, the tension can be adjusted by adjusting the position of the guide body on the side away from the chain in the approaching / separating direction by operating the other movement adjusting tool.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
A description will be given, based on the drawings, of a state in which the object is used in a suspended conveyance device that conveys a conveyed object on a fixed route on the ceiling side.

Referring to FIGS. 5 and 6, the hanging and transporting equipment 1
Is composed of a rail device 10, a transport device 20 supported and guided by the rail device 10, and the like. The rail device 10 is made of an I-shaped material, and a first
A pair of left and right second rails 12 which are made of a C-shaped member, and whose open portions are opposed to each other and are arranged below, and a predetermined lengthwise direction of the rails 11 for connecting the parallel rails 11 and 12 with each other. It is composed of an intermediate yoke member 15 and an end yoke member 16 provided at the location.

In the rail device 10, the end faces of the rails 11 and 12 in the split rail device are opposed to each other (corresponding to each other) in the rail length direction. By being connected, they are connected linearly. Among the yoke members 15, 16, the yoke members 15, 16 located below the ceiling beam are:
The bracket 5 is connected to the bracket 5 from the side of the ceiling beam via a connector 6 such as a bolt and a nut.

The rail device 10 configured as described above
In, the second rail 12 performs support and guide of the moving body, and the first rail 11 performs support and guide of the chain that is moved on a fixed path and gives a moving force to the movable body.

That is, a trolley device 2 which is an example of a moving body
1 is a front trolley 22, a free trolley 23, a rear trolley 24, a front trolley 22 and a free trolley 2.
3 and a trunnion pin 2 connected from the free trolley 23 and the rear trolley 24.
6 is constituted by a connection frame 27 for connecting between the members. Each of the trolleys 22, 23, and 24 has a guide wheel 28 fitted and supported and guided by the second rail 12.
And a run-out preventing wheel 29 that is guided between the end surfaces of the lower plate portions of the second rails 12 are provided, respectively.

The front trolley 22 is provided with a passive body 3 which can be disengaged from a transmission (described later) from a chain.
0 is provided to be able to move up and down, and the horizontal axis 3
Operating lever 3 mounted to be able to swing up and down via 1
2 extends forward, and the rear end of the operating lever 32 and the lower end of the passive body 30 are connected via a pin. Therefore, the operation lever 32 and the passive body 30 are connected to the operation lever 3
When the front end of the second body 2 moves upward, the passive body 30 is linked so as to descend.

At the upper end of the front trolley 22 and at a position behind the passive body 30, a runaway prevention body (hold dog) for preventing the passive body 30 from running away forward when the chain and the passive body 30 are engaged. ) 33 are provided. The runaway preventing body 33 is configured to be swingable back and forth via a pin, and normally, its upper end is urged by a weight portion so as to enter the moving path of the transmission. A cam tail 34 for moving the operation lever 32 upward is extended rearward on the other rear trolley 24.

The trolley device 21 is provided with a support device 35 for the transferred object. That is, the support device 35
A C-neck 36 attached to the lower ends of both trunnion pins 26, an arm 37 attached to the lower part of these C-necks 36 and extending downward, and a support portion 38 provided horizontally at the lower end of the arm 37. Be composed. Reference numeral 39 denotes an object to be transferred.

The chain 40 supported and guided by the first rail 11 to apply a moving force to the trolley device 21 includes a link chain portion 41 and trolleys provided at a plurality of positions in the chain length direction of the link chain portion 41. Portion 42 and a power transmitting member 46 which is suspended from a plurality of portions of the link chain portion 41 at predetermined pitches P in the vicinity of the trolley portion 42, and the passive body 30 is detachable from the power transmitting member 46. Becomes

The trolley portion 42 is provided with a pair of left and right trolley members 43 provided on a center link of the link chain portion 41, and one end (upper portion) of the trolley members 43 is freely rotatable via a left-right axis 44. Roller 4 provided
5 and the like.
The rail 11 is supported and guided on the upper surface of the lower plate. The chain 40 is wound between the pair of guide wheels 47 and 48, and the moving force is applied by the chain drive equipment 50 being engaged with the link chain portion 41.

Of the guide wheels 47, 48, one guide wheel 47 is fixed at one inverted portion, and the other guide wheel 48 is provided to a take-up device 49 provided at the other inverted portion. It is arranged.

The chain drive equipment 50 is, for example, a caterpillar type, and has a flat frame-shaped fixed machine frame 51 as shown in FIGS. The rail 11 is connected via a bracket 52. The machine frame 51 is provided with a pair of ring shafts in the direction of a fixed path. That is, a fixed wheel shaft 53 attached to the machine frame 51 is provided in a hanging manner on the upstream side in the direction of the fixed path, and the fixed wheel shaft 53 is provided with a free wheel 55 through a bearing 54. Is provided. On the lower side in the direction of the fixed path, a bearing 56 is mounted on the machine frame 51, and a rotary drive shaft 57 rotatably supported by the bearing 56 is provided. Body 58
Has been fixed.

The chain 4 is provided between the two wheel bodies 55 and 58.
A caterpillar chain (an example of a rotary transmission) 59 that can be engaged is provided on the 0 side. The engagement of the track chain 59 with the chain 40 is performed from one side of the link chain portion 41. In order to ensure the engagement, a group of idle rollers 60 for guiding the other side surface of the chain 40 is provided on the machine frame 51 via the bracket 61.

On the machine frame 51 side, a tension adjusting means 62 for a caterpillar chain 59 is provided. That is, the tension adjusting means 62 includes a pair of guides 63 and 65 for guiding the inner surface of the caterpillar chain 59 in sliding contact between the two wheels 55 and 58, and separates the guides 63 and 65 in directions approaching and separating from each other. Movement adjustment tools 64, 66 to be moved
Etc.

A first guide body 62 for slidingly guiding the inner surface of the caterpillar chain 59 is in the form of a rail, and is provided on the machine frame 51 via a movement adjusting tool 64 such as a bolt and a nut. By operating the movement adjusting tool 64, the position is adjusted in the direction of approaching or moving away from the fixed path. Further, a second guide body 65 that guides the outer surface of the caterpillar chain 59 in sliding contact is provided on the machine frame 51 side via a movement adjusting tool 66 such as a bolt and a nut. Accordingly, the position is adjusted in the direction of approaching or moving away from the first guide body 62 with respect to the fixed path.

The rotary driving device 70 for driving the caterpillar chain 59 includes a motor 71, a speed reducer 72, and the like, and an output shaft 73 projects from the speed reducer 72. The output shaft 73 of the rotation drive device 70 is configured to be freely connected to and separated from the rotation drive shaft 57. At that time, the connection and separation of the rotation drive shaft 57 and the output shaft 73 are performed via a connection shaft 74 whose both ends are separated and connected to the rotation drive shaft 57 and the output shaft 73. The connecting shaft 74
Are connected and separated using, for example, spline fitting.

Between the rotary driving device 70 and the machine frame 51, there is provided a rotation preventing means 80 which is a buffer type using an elastic body. That is, a guide member 82 is provided on a support body 81 from the machine frame 51 side, and a threaded portion 83A is formed at a base end side of a rod body 83 guided by the guide member 82 and movable in a fixed path direction. In addition, a bifurcated connecting portion 83B is provided on the distal end side. A coil spring 84, which is an example of an elastic body, is externally fitted to the rod body 83 between the support 81 and the connecting portion 83B, and a washer is provided on a portion of the screw portion 83A protruding from the support 81. A nut 86 is engaged through 85.

An arm 75 is connected to the speed reducer 72 of the rotary driving device 70, and the arm 75 is provided with an arm 77 via a bolt-nut type connecting member 76. Then, the arm 77 and the connecting portion 83B are
They are connected via a connecting pin 87 so as to be relatively rotatable and connectable and separable. A detector 88 for detecting an abnormal movement of the arm 77 is provided on the machine frame 51 side so as to be adjustable in position.

The operation of the above embodiment will be described below. When assembling the chain drive equipment 50, a rotary drive device 70 having the most suitable capacity according to the load on the chain 40 side is prepared. That is, the rotary driving device 70 having the most suitable capacity and size is prepared, and the connecting shaft spline-fitted to the spline hole of the output shaft 73 on the rotary driving device 70 side whose diameter has changed. 74 is prepared.

In this state, first, the lower part of the connecting shaft 74 is spline-fitted to the rotary drive shaft 57 from above, and the output shaft 73 is spline-fitted to the upper part of the connecting shaft 74 from above. Next, the connecting portion 83B is connected to the arm 77 of the anti-rotation means 80 set in advance via a connecting pin 87 so as to be relatively rotatable.

Before and after this, the tension of the caterpillar chain 59 is adjusted by the tension adjusting means 62. That is, first, by operating the movement adjusting tool 64, the position of the first guide body 62 is adjusted in the direction of approaching and separating from the fixed path, so that the chain 40 Adjustment is made to ensure engagement with. Next, by operating the movement adjusting tool 66, the position of the second guide body 65 is adjusted in the direction of approaching and separating from the fixed path, thereby adjusting the tension of the caterpillar chain 59.

As described above, the assembling work of the chain driving equipment 50 can be easily, quickly and inexpensively performed by using the rotary driving device 70 having the most suitable capacity according to the load on the chain 40 side. Further, since only the fixed machine frame 51 is required, the structure can be reduced in size and simplified, and the cost can be reduced, as compared with a type in which the machine frame is combined with a movable machine frame. In addition, the rotation drive device 70 can be separated by the reverse operation to the above, so that the replacement operation of the rotation drive device 70 when changing the capacity can be easily, quickly and inexpensively performed.

As described above, during the operation after the intended assembly or change of the chain drive equipment 50 and the incorporation of the transfer device 20, the application of the moving force to the chain 40 side is performed as shown in FIGS. As shown in FIG. 7, the rotation of the output shaft 73, which is the output from the
The driving wheel body 58 is forcibly rotated to drive the caterpillar chain 59, and is integrally moved by the engagement of the caterpillar chain 59.

At that time, the caterpillar chain 59 between the two wheel bodies 55 and 57 is slidably guided by the first guide body 62, so that the engagement with the chain 40 is surely performed, and the second chain body is connected to the second guide body 62. By being slid and guided by the guide body 65, it is moved without swinging and without generating noise. In addition,
When the caterpillar chain 59 is extended with the use progress, the position of the second guide body 65 is adjusted in the direction away from the fixed path by operating the movement adjusting tool 66, for example, as shown by the phantom line in FIG. By doing so, the tension of the caterpillar chain 59 can be adjusted.

The movement of the chain 40 can be performed as described above. At this time, the rotation preventing device 80 can prevent the rotation driving device 70 from rotating. When an impact force is generated on the chain 40 side, the coil spring 84
The movement of the rod body 83 can absorb the movement of the rod body 83, and an abnormal movement of the arm body 77 can be detected by the detector 88.

As shown in FIGS. 5 and 6, the trolley device 21 is moved on a fixed path by engaging the power transmitting body 46 with the passive body 30 and receiving the moving force of the chain 40. . At this time, the operation lever 32 has its front end moved downward. When the trolley device 21 tries to run away during such movement, the runaway preventing body 33 comes into contact with the rear surface of the transmission 46, so that the runaway is prevented.

During the operation as described above, the trolley device 21 is supported and guided by the guide wheel 28 fitted on the second rail 12 and the run-out preventing wheel 29
Is guided between the end faces of the lower plate portion of the second rail 12, so that it is stably moved on a fixed path without large swing. The chain 40 has its rollers 4
5 is smoothly guided and supported by the first rail 11.

In the above-described embodiment, the suspended transfer equipment 1 is shown as a transfer type employing the chain drive equipment 50, but it may be a floor type transfer equipment for moving a carriage.

In the above-described embodiment, the caterpillar chain 59 is shown as the rotary transmission body, but it can be of various types such as a normal chain type or a belt type.

In the above embodiment, the rotary drive shaft 57
The connection between the output shaft 73 and the output shaft 73 is performed via the connection shaft 74, but the connection between the rotary drive shaft 57 and the output shaft 73 may be directly performed. Further, they may be connected via a key or the like.

[0041]

According to the first aspect of the present invention, the tension of the rotary transmission between the two wheels can be suitably adjusted by the tension adjusting means. Thus, when the rotary drive device is driven, the rotary transmission between the two wheels can be securely engaged with the chain, and can move without swinging and without generating noise. Then, when the rotary transmission body is extended with the use progress, the tension of the rotary transmission body can be adjusted by adjusting the tension adjusting means. At that time,
Since the tension adjusting means is provided on the fixed machine frame, the overall structure can be simplified, the cost can be reduced, and the tension can be easily adjusted.

According to the second aspect of the present invention,
By operating one of the movement adjusting tools, the position of the guide body on the chain side is adjusted in the approaching / separating direction, so that the rotation transmission body can be securely engaged with the chain, and the other movement adjustment can be performed. By adjusting the position of the guide body on the side away from the chain in the direction of approaching and separating by operating the tool,
Adjustment of the tension of the rotary transmission can be performed. The rotary transmission between the two wheels is guided in sliding contact with the guide body on the chain side, so that the engagement with the chain can be reliably performed, and the rotating transmission body slides on the guide body on the side remote from the chain. By being guided, it is possible to move without swinging and without generating noise. Adjustment of the tension with respect to the elongation of the rotary transmission body can be easily performed by adjusting the position of the guide body on the side away from the chain in the approaching / separating direction by operating the other movement adjusting tool.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention and is a partially cutaway plan view of chain drive equipment.

FIG. 2 is a partially cutaway side view of the chain drive equipment.

FIG. 3 is a partially cutaway front view of the chain drive equipment.

FIG. 4 is a plan view of the chain drive equipment.

FIG. 5 is a schematic plan view of a hanging transfer facility using the chain drive facility.

FIG. 6 is a side view of a main part of a hanging transfer facility using the chain drive facility.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hanging conveyance equipment 10 Rail apparatus 11 1st rail 12 2nd rail 20 Transport apparatus 21 Trolley apparatus (moving body) 30 Passive body 35 Supporting apparatus 39 Conveyed object 40 Chain 46 Transmission body 50 Chain drive equipment 51 Machine frame 53 Fixed Wheel axis (wheel axis) 55 Idler wheel (wheel body) 57 Rotation drive shaft (wheel body axis) 58 Drive wheel body (wheel body) 59 Caterpillar chain (rotary transmission body) 60 Idler roller 62 Tension adjusting means 63 first guide body 64 movement adjustment tool 65 second guide body 66 movement adjustment tool 70 rotation drive device 71 motor 72 reduction gear 73 output shaft 74 connecting shaft 80 rotation prevention means

Claims (2)

[Claims] 1. A chain drive facility for applying a moving force to a chain that is moved on a fixed path, wherein a fixed frame is provided with a pair of rings in a direction of the fixed path via respective ring shafts. It is provided so that it can rotate freely, and between the two
On the chain side, a rotation transmission body whose outer surface side is engageable is provided, one of the wheel shafts is a rotation drive shaft, and a rotation drive device is interlocked to this rotation drive shaft, and on the machine frame side, Chain drive equipment characterized by being provided with a tension adjusting means for a rotary transmission. 2. A tension adjusting device comprising: a pair of guides for slidingly guiding an inner surface of a rotary transmission between two wheel bodies; and a movement adjusting tool for individually moving the guides in a direction of approaching and separating from each other. The chain drive equipment according to claim 1, wherein