JPH0463762A - Transport device using carrier - Google Patents

Abstract

PURPOSE:To reduce reciprocating distance of a carrier and dispense with a stopper to obstruct rotational movement of an antiback lever by forming a pressing face capable of contacting with the upper face side on an antiback lever for obstructing retreat of a carrier and a retreat obstructing face capable of contacting with the back side. CONSTITUTION:In case of stopping a trolley device (carrier) 4, when the trolley device 4 is approached, a cylinder device is developed and a stopper body 39 is advanced. Then a passive body 33 is pushed down with the stopper body 39 to disengage with a transmitting body 32, the trolley device 4 is let in non drive condition, and hereafter running is stopped by collision of a hold dog 46 to the stopper body 39. When the trolley device 4 is retreated by reaction in the upper stream direction, retreat of the trolley device 4 is obstructed by contacting of a rear guide wheel 24 with the retreat obstructing face 58 of an antiback lever 54. At this time, the pressing face 57 of the antiback lever 54 is contacted with the upper face of the guide wheel 24, and applies brake force on the guide wheel 24.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is used, for example, in a car manufacturing factory, when a carrier supporting a car body is transported at a constant speed while parts are assembled, painted, dried, etc. on the car body. The present invention relates to a conveyance device using a carrier, which is employed when carrying out work.

2. Description of the Related Art Conventionally, this type of conveying device has been used, for example, in
As seen in Publication No. 141170, it has a carrier that is supported and guided by rails and can travel along a fixed path, and a traveling drive device disposed along the rail, and a transmission body installed in this traveling drive device. and a passive body provided on the carrier, one of which is configured to be freely engageable and detachable. The carrier is stopped by a stop device installed at an appropriate location along a certain route! The engagement between the transmission body and the passive body is disengaged by the stopper body, and a hold dog provided swingably on the carrier collides with the stopper body. To prevent backing up, an anti-back lever is swingably mounted on the rail above the stop. That is, as shown in FIG. 7, when trying to stop the front trolley 70 on the carrier side, the wheel 71 provided at the rear of the front trolley 70 moves as shown by the dashed line in FIG.
By contacting the anti-back lever 72 from the upper side and rotating the end of the anti-back lever 72 upward from the position shown by the solid line in FIG. 7 to the position (G) shown by the dashed-dot line, the front trolley 70 moves downward It passes in the downward direction 73. After that, the wheel 71 travels below the locus 74 of the vertical movement drawn by the free end of the anti-back lever 72, as shown by the two-dot chain line (H) in FIG.
Then, the hold dog 75 provided on the front trolley 70 collides with the stopper body 76 as shown in (b) in FIG. This is because when the wheel 71 travels below the above-mentioned trajectory 74, the anti-back lever 72 rotates downward, returns to the position facing the wheel 71 from above as shown by the solid line, and moves the front trolley 70. This was to prevent a retreat. Even if the front trolley 70 retreats in the upward direction 77 due to the reaction of the above collision, the wheels 7
1 comes into contact with the anti-back lever 72, thereby preventing the front trolley 70 from further retreating. At this time, the anti-back lever 72 receives a force in the upward direction 77 from the wheel 71, and thus tends to rotate downward. However, the stopper 78 attached to the anti-back lever 72
comes into contact with the receiving posture regulating surface 79, thereby regulating the anti-back lever 72 from rotating downward from the position shown by the solid line.

Problem to be Solved by the Invention However, in the above-mentioned conventional device, as shown in FIG. 7, when the front trolley 70 is stopped, the wheel 71 is moved downward from the trajectory 74 drawn by the roadside of the anti-back lever 72. At this time, the position where the hold dog 75 collides with the stopper body 76 and the position where the backward wheel 71 contacts the anti-back lever 72! Since the front trolley 70 moves between
It was necessary to increase this carrier moving distance L2. By the way, when the front trolley 70 stops, after it comes into contact with the anti-back lever 72 and is prevented from moving backward, the front trolley 70 further moves in the downward direction 73 due to the reaction, and the hold dog 75 comes into contact with the stopper body 76 again.

In other words, the carrier stops after repeating the collision and reaction several times within the carrier movement distance L2.4 At this time, since the carrier movement distance L2 is large as described above, the front trolley 70 is shaken. The freely movable hold dog 75 swings downward to fall forward due to the impact caused by the repetition of the above-mentioned collision and recoil, as shown by (N) in FIG.

When such downward swinging and movement in the downward direction 73 are timed, the hold dog 75 slips under the stopper body 76 and passes in the downward direction 73, as shown by (R) in FIG. In some cases, the intended stop could not be carried out. Furthermore, the stopper 78 may be damaged due to the impact caused by the above-described repeated collision and recoil, and the anti-back lever 72 may not be able to reliably prevent the carrier from retreating.

It is an object of the present invention to reduce the reciprocating distance of the carrier, to prevent the hold dog that has swung forward from passing under the stopper body, and to prevent the rotation of the anti-back lever. An object of the present invention is to provide a conveyance device using a carrier that can eliminate the need for a stopper for performing this.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a carrier-using conveying device that includes a carrier that is supported and guided by rails and can freely travel along a fixed path, and a travel drive device that is disposed along the rails. One of the transmission body provided in the travel drive device and the passive body provided in the carrier is configured to be movable in and out of engagement, and the transmission body provided in the travel drive device and the passive body provided in the carrier are configured to be freely engaged and disengaged, and the travel of the carrier is caused to disengage and disengage at an appropriate position on the predetermined path. An anti-back lever for preventing the carrier from retreating is swingably attached to the rail at the upper end of the stopping device, and the anti-back lever has a pressing surface that can freely come into contact with the upper surface of the carrier. and a retreat prevention surface that can freely come into contact with the rear surface side of the carrier.

According to the configuration of the present invention, when the carrier is stopped, the rear side of the carrier that is about to retreat comes into contact with the retreat prevention surface of the anti-back lever, thereby preventing the carrier from retreating. At this time, a downward swinging force is generated in the antiback lever due to the force exerted by the rear side of the carrier on the backward prevention surface of the antiback lever, and this downward swinging force causes the pressing surface of the antiback lever to move toward the top surface of the carrier. This makes it possible to prevent the anti-back lever from swinging further downward and to apply a braking force to the carrier side. By generating a downward swinging force, contact with the carrier side is reliably maintained even though the retreat prevention surface is made small, and thus the anti-back lever itself can be formed in a short length.

Example An embodiment of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a hanging conveyance device which is an example of a conveyance device using a carrier, and trolley guide rail 2
, a trolley drive device rail 3 installed above the trolley drive device rail 3, a trolley device 4 which is an example of a carrier guided by the trolley guide rail 2, and a transported object support device 5 attached to the trolley device 4. , the rail 3 for the trolley drive device
and a travel drive device (such as a chain conveyor) 6 guided by the conveyor belt. The trolley device 4 includes a front trolley 7, a pair of front and rear free trolleys 8.9, and a rear trolley 1.
0, a connecting rod 11.12 that connects between the front trolley 7 and free trolley 8, and between free trolley 9 and rear trolley 10, and trunnion pins 13 and 14 connected from both free trolleys 8.9. It consists of a connecting frame 15 that connects the parts. The object support device 5 has a C-neck 16 attached to the lower end of the trunnion bin 1314.
．． 17, a downwardly extending arm 18°19 attached to the lower part of the C-neck 16.17, and a horizontally extending arm 18.19 installed at the lower end of this arm 18. It consists of a support part 20.21. The trolleys 7.8, 9.10 each have guide wheels 24, 25, 26, 27 and anti-lateral shake wheels 28, 29, 3031, respectively. The front trolley 7 has a passive body 33 which can be engaged with and detached from the transmission body drive protrusion 32 from the travel drive device 6 so as to be able to rise and fall, and can also be vertically swung via a horizontal shaft 34 in the middle thereof. A removably mounted operating lever 35 extends forward. The rear end of the operating lever 35 and the lower end of the passive body 33 are connected via a pin 48. Therefore, the operating lever 35 and the passive body 33 are interlocked so that when the operating lever 35 moves upward, the passive body 33 descends. At this time, the vertical movement of the passive body 33 is guided by a cylindrical body 49 attached to a guide wheel shaft and a guide body 50 provided on the front trolley 7. The front trolley 7 includes, at the rear of the upper end,
A hold dog 46 is provided at the rear of the passive body 33. This hold dog 46 is configured to be able to swing back and forth via a pin 51, and is normally biased by a weight so that its upper end enters the movement path of the transmission body 32.

The other rear trolley 10 has a cam tail 47 extending rearward for moving the operating lever 35 upward. As shown in FIGS. 3 and 4, a frame 3 is attached to one of the pair of left and right trolley guide rails 2 at an appropriate location on the suspended conveyance path 45.
6 is installation. A pair of guide rails 37 are attached to the upper part of the frame body 36 in a lateral direction perpendicular to the conveyance direction, and these guide rails 37 have guide grooves 38 on opposing surfaces. Reference numeral 39 denotes a plate-shaped stopper body guided by both guide grooves 38, and its guiding movement causes the passive body 33 to move above the trolley guide rail 2.
It becomes possible to enter the front side from the side. Reference numeral 40 denotes a stop block that receives the front end of the stopper body 39 that has entered, and is attached to the upper surface of the other trolley guide rail 2. 41 is a stopper drive device that moves the stopper body 39 in and out! The cylinder device 42 attached to the frame body 36 and its piston rod 43 are connected to each other, and the piston rod 43 is connected to the stopper body 39. These 36
- 43 constitute a stopping device 44 that moves the passive body 33 in a detached manner and prevents the trolley device 4 from traveling. Second
As shown in FIGS. 3 and 5, this stop device 4
A bracket 52 is erected on the upper surface of the other trolley guide rail 2 at the upper end of the trolley guide rail 2. This bracket 52 is formed from a vertical portion 52A and a horizontal portion 52B. A horizontal shaft 53 perpendicular to the direction of the hanging conveyance path is rotatably attached to the vertical portion 52A of the bracket 52. This horizontal axis 53
The anti-back lever 54, which has its base end fixed to the trolley guide rail 2, extends downward through a notch 55 formed in the upper plate of the trolley guide rail 2, and thus moves around the horizontal axis 56 within the trolley guide rail 2. It can freely swing up and down. As shown in FIG. 2, the anti-back lever 54 has a Y-shape when viewed from the side, and the roadside side thereof has a horizontal portion having a pressing surface 57 that comes into contact with the upper surface of the guide wheel 24, and a guide wheel 24. It is divided into vertical sections with a back-stopping surface 58 that abuts the rear surface of the rear wheel 24, and both surfaces 57, 58 are located at right angles. Furthermore, the base end of the anti-back lever 54 comes into contact with the lower surface of the horizontal portion 52B as shown by the two-dot chain line in FIG. 2, thereby preventing the road end portion of the anti-back lever 54 from swinging further downward. are doing.

Next, the operation of the above embodiment will be explained.

Normally, the trolley device 4 travels by engaging the transmission body 32 with the passive body 33, as shown in FIG. At this time, the operating lever 35 is moving downward between its front ends. When the trolley assembly af4 tries to run away during such running, the hold dog 46 comes into contact with the transmission body 32, so that runaway is prevented. When stopping the trolley device 4 at a predetermined stop position, when the trolley device 4 to be stopped approaches, the cylinder device 42 is actuated to advance, and the stopper body 39 is advanced laterally with respect to the conveyance path. Then, as shown in FIG. 2, the passive body 33 is first pushed down by the stopper body 39 and transmitted!
The engagement with the Ilb body 32 is disengaged, the trolley device 4 becomes non-driving, and the hold dog 46 collides with the stopper body 39 as shown by the two-dot chain line (A) in FIG. Running is stopped. Immediately before the running stops, the guide wheel 24 of the front trolley 7 moves along the dashed line (
The anti-back lever 54 is brought into contact with the anti-back lever 54 from below as shown in (B), and the downward movement is made by moving the anti-back lever 54 upward around the horizontal axis 56 as shown in the dashed line (C) in FIG. It passes in the downward direction 60. Then, the rear guide wheel 24 is moved once to the rearward preventing surface 5 of the anti-back lever 54, as shown by the two-dot chain line (D) in FIG.
After the holding dog 46 travels below the trajectory 59 of the vertical swing drawn by the free end of 8, the hold dog 46 collides with the stopper body 39. Then, the trolley device 4 moves upward in the upward direction 61 due to the reaction.
When attempting to back up, the rear guide wheel 24 moves backward while the anti-back lever 54's back-up prevention surface 58
It is equipped with a trolley by coming into contact with it! 4's retreat is prevented. At this time, a downward swinging force is generated in the anti-back lever 54 due to the force exerted by the guide wheel 24 on the backward prevention surface 58, and this downward swinging force causes the pressing surface 57 of the anti-back lever 54 to move against the guide wheel 54. The anti-back lever 54 comes into contact with the upper surface of the anti-back lever 54.
can prevent the guide wheel 24 from swinging downward from the position shown by the solid line in FIG. 6, and can apply a braking force to the guide wheel 24. By generating a downward swinging force, the anti-back lever 54 can be reliably kept in contact with the guide wheel 24 even though the backward blocking surface 58 is made small.
It can be formed into a short length. Further, by forming the pressing surface 57 on the anti-back lever 54 as described above, the stopper conventionally provided on the anti-back lever becomes unnecessary.

As shown in FIG. 6, when the anti-back lever 54 is used, the position where the hold dog 46 collides with the stopper body 39 and the position where the retracting guide wheel 24
Since the front trolley 7 moves between the position where it comes into contact with the front trolley 7, this distance is defined as the carrier movement path ML1. This carrier moving path wlLt can be made smaller than the carrier moving path ML2 of the conventional example described in the prior art section and shown in FIG. Therefore, when the trolley device 4 stops and repeats collision and reaction within the carrier movement distance L1, even if the hold dog 46 swings forward due to the impact, the dot-by-dot line in FIG. As shown in (E), since the upper end of the hold dog 46 comes into contact with the stopper body 39, the hold dog 46 does not slip below the stopper body 39.

To re-run the joint device 4 that has been stopped as described above,
This is made possible by retracting the stopper body 39, raising the passive body 33, and engaging the transmission body 32 with the passive body 33.

In the above embodiment, a suspended conveyance device using the trolley device 4 as a carrier was shown, but this may also be a floor conveyor device using a trolley. However, the opposite may be true.

Effects of the Invention According to the present invention having the above configuration, when the carrier is stopped, the reciprocating distance of the carrier can be reduced, and even if the hold dog swings forward, the tip thereof is always kept in contact with the stopper body. Since it can come into contact with the stopper body, the hold dog can be prevented from passing under the stopper body, and the carrier can always be stopped reliably. Braking force can be applied to the carrier side using the retreating force, thereby reducing the number of reciprocating swings. Further, due to the presence of the pressing surface, there is no need to provide the anti-back lever with a stopper for regulating its swinging, and therefore, it is possible to eliminate problems when the carrier is stopped due to breakage of the stopper.

[Brief explanation of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is a side view, FIG. 2 is a partially cutaway side view of the main part, and FIG. 3 is a partially cutaway plan view of the same part. Figure 4 shows the TV-IV in Figure 3.
Fig. 5 is a view from the v-■ arrow, Fig. 6 is a partially cutaway schematic side view showing the movement of the main parts, and Fig. 7 is a partially cutaway view showing the movement of the main parts in the conventional example. It is a cutaway schematic side view. 1...Hanging conveyor! , 2...Trolley guide rail, 4...Trolley device (carrier), 6...Traveling drive device! , 7... Front trolley, 24-27... Guide wheel, 32... Transmission body, 33... Passive body, 3
9... Stopper body, 44... Stopping device, 45...
Hanging conveyance route, 46...Hold dog, 53...
・Horizontal axis, 54... Anti-back lever, 55... Notch, 56... Horizontal axis center, 57... Pressing surface, 58
... Backward prevention surface, 70... Front trolley, 71.
・・Wheel, 72・・Anti-back lever, 75・
-Hold dog, 76...stopper body.

Claims (1)

[Claims] 1. It has a carrier that is supported and guided by rails and can freely travel along a fixed route, and a travel drive device disposed along the rail, a transmission body provided in the travel drive device and a passive body provided in the carrier. A stop device is provided at an appropriate position on the certain path to disengage the engagement and prevent the carrier from moving, and the upper end of the stop device causes the carrier to retreat to the rail. The anti-back lever is swingably mounted to prevent the movement of the carrier, and the anti-back lever is formed with a pressing surface that can freely come into contact with the top surface of the carrier, and a retreat prevention surface that can freely come into contact with the rear surface of the carrier. Conveyance device using a carrier.