JPH04105025U - trolley conveyor - Google Patents

Abstract

(57) [Summary] (with amendments) Trolley conveyor [Purpose] To prevent air pockets from forming inside the transported object by swinging or rotating the transported object immersed in the electrodeposition bath over a large range. [Structure] Both straight U-shaped portions of the left and right load chains 43, 44 hanging loosely in a substantially U-shape from a carrier 19 are separately hoisted by a hoisting device 21. The left and right vertical transmission wheels 52 are hung on the lower ends of the hanging parts of the left and right load chains 43 and 44, respectively. The conveyed object support frame 26 is passed to the left and right vertical transmission wheels 52 and stopped. Left and right load chains 43, 44
Let each be endless.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is suitable for use in trolley conveyors, especially in painting lines of automobile factories, etc. The car body immersed in the liquid in the electrodeposition tank is rocked to prevent air pockets from forming inside it. It relates to a conveyor used for conveying while moving.

0002

[Conventional technology]

This type of conveyor is disclosed, for example, in Japanese Patent Laid-Open No. 59-141883. As shown in the figure, it has front and rear winding drums that are spaced apart from each other in the front and back direction of the carrier. A hoisting device, left and right hanging cables whose upper ends are wrapped around the front and rear hoisting drums, The hanger hanging frame hangs from the lower ends of the left and right hanging cables, and the upper end hangs. The left and right sides are fixed to the carrier suspension frame and have a conveyed object placement section at the lower end. hanger and shake the hanger hanging frame in the electrodeposition tank for painting conveyed objects. It is known that the length of the hanging length of the hanging rope can be changed separately for the purpose of movement.

0003

[Problem that the idea aims to solve]

In the above conveyor, the hanger is swung by swinging the hanger hanging frame. This causes the conveyed object hung on the hanger to swing, thereby causing the inside of the conveyed object to Although we try to prevent air pockets from forming, the swing range of the conveyed object is narrow, so air pockets may not form. To completely remove air pockets, it is necessary to increase the number of rocking movements, and However, there was a problem that air pockets could not be completely removed.

0004 The purpose of this invention is to provide a trolley conveyor that solves the above problems. Ru.

[0005]

[Means to solve the problem]

The trolley conveyor based on this invention hangs loosely from the carrier in a roughly U-shape. It has left and right load chains, and the U-shaped straight lines of the left and right load chains. A hoisting device that hoists the parts separately, and a hoisting device that hangs on the lower ends of the hanging parts of the left and right load chains. The vertical transmission wheels on the left and right and the vertical transmission wheels on the left and right are stopped. The load chain on the left and right is It is considered to be independent.

[0006]

[Effect]

The trolley conveyor based on this invention has a trolley that hangs loosely from the carrier in a roughly U-shape. The left and right load chains have a U-shaped double straight A hoisting device that hoists the wire sections separately, and a hoisting device that hoists the wire sections separately and hooks them onto the lower ends of the hanging parts of the left and right load chains. The left and right vertical transmission wheels are connected to each other, and the left and right vertical transmission wheels are Because it is equipped with a conveyor support frame, the U-shape of the left and right load chains is When both straight parts of a shape are rolled up and lowered at the same time, the lengths of both straight parts change in the same way. Therefore, the transmission wheel does not rotate, and the conveyed object support frame is attached to the transmission wheel together with the transmission wheel. When the arm moves up and down, winding up one of the straight sections and lowering the other, the length of both straight sections increases. Without changing the direction of movement, the transmission wheel rotates and the The conveyed object support frame rotates.

[0007] Furthermore, since the left and right load chains are endless, When winding up one of the U-shaped straight parts of the left and right load chains and lowering the other, The length of winding and unwinding is not restricted.

[0008]

【Example】

An embodiment of this invention will now be described with reference to the drawings.

[0009] In this example, forward and backward refers to the direction in which the trolley moves with reference to the direction of movement of the trolley. The side facing forward is called the front, and the opposite side is called the back. shall be said.

0010 The trolley conveyor has a main rail 12 extending in the front and back direction across the upper part of the electrodeposition tank 11. and a sub rail 13 extending parallel to the left side of the main rail 12, and a sub rail 13 extending parallel to the main rail 12. A self-propelled drive trolley 14, a front main driven trolley 15 and a rear main driven trolley 16, which move with , a front secondary trolley 17 and a rear secondary trolley 18 that move along the secondary rail 13, and the above-mentioned trolley. Carrier 19 moving together with 14 to 18 and the hoisting device equipped on carrier 19 carrier 21 and the conveyed object support frame suspended from the carrier 19 by the hoisting device 21. It is equipped with a frame 26.

[0011] Inside the electrodeposition bath 11, there are a pair of vertical lower guides each having a U-shaped cross section with their openings facing each other. Drail 31 is fixed in position. At the upper end of the lower guide rail 31, there is a An introduction guide portion 32 that has been previously expanded is provided.

0012 The carrier 19 is connected to the drive trolley 14 by a horizontal rod 33, and has front and rear driven main trolleys. The main load bar 34 is stopped at the trolleys 15 and 16, and the main load bar 34 is stopped at the front and rear sub trolleys 17 and 18. from the front and rear ends of the main and sub load bars 34 and 35, respectively. Two pairs of vertical suspension rods 36, 37 on the left and right extending downward; The square frame 38 is fixed at the lower end of 37, and the square frame 38 is fixed at the front and rear frame members of the square frame 38. It consists of a pair of left and right reinforcing members 39. In the middle of the length of the left and right frame members of the square frame 38, there is a A pair of vertical upper guide rails 41 each having a U-shaped cross section with their openings facing each other are provided. is fixed at the upper end of the At the lower end of the upper guide rail 41, there is a An expanded introduction guide section 42 is provided.

[0013] The hoisting device 21 has left and right endless load chains 43, 44. These load chains 43 and 44 are installed on the main load bar 34 at intervals in the longitudinal direction. It is wrapped separately around the attached front and rear winding sprockets 45 and 46. Before and after A chain bucket 47 is provided between the winding sprockets 45 and 46. The unloading sides of both load chains 43 and 44 are accommodated therein. Front and back winding There are two front and rear central guide sprockets 48 below each of sprockets 45 and 46. At the same time, the front and rear center guide sprockets 48 are placed to the left of each other. The front and rear left guide sprockets 49 are located on the same right, and the front and rear right guide sprockets 51 are located on the same right. One of each is placed. The load side of the left load chain 43 has front and rear winding. From sprockets 45 and 46, center guide sprocket 48 and left guide sprocket It is guided sequentially by the cut 49 to the left edge of the carrier 19, and from there it is loosened in a roughly U-shape. It is drooping and drooping. The load side of the right load chain 44 has front and rear winding sprockets. from the center guide sprocket 48 and the right guide sprocket. 51 to the right edge of the carrier 19, and from there the left load chain Similar to N43, it is loose and hanging down in a roughly U-shape.

[0014] Then, the left and right vertical transmission wheels are attached to the lower ends of the hanging parts of the left and right load chains 43 and 44. 52 are hung on each.

[0015] The conveyed object support frame 26 is suspended between both transmission wheels 52. The ladder-shaped left and right side frames 53 fixed to both transmission wheels 52 and A pair of horizontal parallel bar-shaped bolts at the front and rear are secured to the lower ends of both side frames 53. Tom frame 54 and more. At the center of the shafts of both transmission wheels 52, 53, there is a short shaft protruding from the side. Cylindrical guide members 55 are provided, and these guide members 55 serve as upper guides on the left and right sides. 41, each fitted together. The bottom frame 54 is equipped with a chuck mechanism 56. A vehicle body W, which is an object to be transported, is chucked to this.

[0016] When the carrier 19 is brought above the electrodeposition bath 11, the carrier 19 is stopped and both the Both U-shaped straight parts of the chain 43 and 44 are lowered at the same time. Then, both rows The length of both U-shaped straight parts of the chain 43 and 44 is increased, and the transmission wheel 52 is rotated. It descends together with the conveyed object support frame 26 without rotating. At this time, the guide The member 52 is initially guided by the upper guide rail 41 and then by the lower guide rail 31. Because it is guided, the conveyed object support frame 26 is lowered in a stable posture without wobbling. descend. Eventually, the vehicle body W supported by the conveyed object support frame 26 is immersed in the liquid in the electrodeposition bath 11. Once soaked, lower one of the U-shaped straight parts of both load chains 43 and 44. and then wind up the other end. Then, both U-shaped straight parts of both load chains 43 and 44 One side is pulled up and the other side is pulled down, causing the transmission wheel to wheel 52 is rotated, and the conveyed object support frame 26 is also rotated together with the transmission wheel 52. . As a result, the transported object W supported by the transported object support frame 26 is rotated, and Even if there is an air pocket inside the object W, the air there will be replaced with the liquid and the air pocket will disappear. It becomes.

[0017] In FIG. 1, the conveyed object W is rotated 90 degrees in the electrodeposition tank 11 from when it was conveyed. Conditions are indicated, but this is usually sufficient. However, for example, when transporting goods If the shape is complex and it is difficult to eliminate air pockets, rotate it continuously for more than 360 degrees. Alternatively, normal rotation and reverse rotation may be performed alternately. In this way, the rotation Since air pockets move inside, air pockets can be eliminated efficiently.

[0018] By the way, the thickness of the electrodeposition of the paint depends on the distance between the conveyed object W and the peripheral wall of the electrodeposition tank 11. . When the transported object W is rotated as described above, the center of rotation is at the height of the transported object W. Because it is at an intermediate level, the distance between the conveyed object W and the peripheral wall of the electrodeposition bath 11 is small before and after rotation. Since no changes occur, uneven electrodeposition of paint is less likely to occur. Also, change to the above interval. Even if there is a change, the change will occur if the same distance is large for each part of the transported object W. Since large and small cases occur equally, by rotating the conveyed object W, the coating can be This prevents uneven electrodeposition of the material.

[0019] Furthermore, if the rotation of the conveyed object W is only performed after the conveyed object W is immersed in the liquid, First, if necessary, it is also possible to rotate the conveyed object W while raising and lowering it. transportation When moving the object W into and out of the liquid, if the object W is tilted at an appropriate angle, the liquid will Objects can be moved in and out smoothly.

[0020]

[Effect of the idea]

According to this idea, both the U-shaped linear parts of the left and right load chains can be hoisted at the same time. - When lowered, the lengths of both straight sections change in the same way, and the transmission wheel rotates. The conveyed object support frame moves up and down along with the transmission wheel without When one side is hoisted up and the other side is hoisted down, the length of both straight sections remains the same and the direction of movement changes. In turn, the transmission wheel rotates, and the conveyed object support frame rotates accordingly. Therefore, it is not only possible to raise and lower the transported object supported by the transported object support frame, but also to The conveyed object can be swung or rotated over a wide range.

[0021] Furthermore, since the left and right load chains are endless, When winding up one of the U-shaped straight parts of the left and right load chains and lowering the other, Since there are no restrictions on the length of the hoisting and unwinding, the conveyed items can be continuously transported if necessary. It can be rotated.

[Brief explanation of drawings]

FIG. 1 is a perspective view.

FIG. 2 is a front view.

FIG. 3 is a side view showing the lifting and lowering state of the conveyed object.

FIG. 4 is a side view showing the rotating state of the conveyed object.

[Explanation of symbols]

19 carrier 21 Hoisting device 26 Object support frame 43, 44 Load chain 45, 46 Winding sprocket 52 Transmission wheel

Claims (1)

[Scope of utility model registration request] [Claim 1] Left and right load chains 43, 44 are suspended from the carrier 19 in a substantially U-shape, and both straight U-shaped portions of the left and right load chains 43, 44 are wound separately. The hoisting device 21 that raises the hoist, and the left and right vertical transmission wheels 52 that are hung on the lower ends of the hanging parts of the left and right load chains 43 and 44.
and a conveyed object support frame 26 that is stopped across the left and right vertical transmission wheels 52, and the left and right load chains 43 and 44 are endless, respectively.
trolley conveyor.