JPS59149857A - Tow conveyor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves transporting a cart running on a floor by engaging it with a chain via an engagement/disengagement mechanism, and also engaging it with a chain by coming into contact with a parked front cart. The present invention relates to a tow conveyor that can be uncoupled and accumulated, and more particularly to a trolley whose length can be reduced during accumulation.

In general, tow conveyor carts have a leading part that projects forward and a tail part that projects rearward outside of the main body of the cart on which objects are placed, and are relatively long.

For this reason, even when the carts are stored in an empty state without carrying objects, a long distance is required for the long carts to last a predetermined number of times in a row. Particularly, as shown in Fig. 6, in an automobile painting line, after a body that has passed through a drying oven of a predetermined length is lifted up on a conveyor line A, it is moved to another conveyor line using a lifting transfer device L2. The bodies are transferred to overhead conveyor line C, but when the line is stopped at the end of the workday, all the bodies in the drying oven are discharged, so when the line starts operating, the previous day's discharge is transferred to tow conveyor B. After the tow is loaded, new transfer to the tow conveyor B is stopped for the time required for the tow to pass through the drying oven. For this reason, a large number of empty carts are accumulated in front of the lifting/lowering transfer device Ll, and a long distance (buffer distance) l is required for these empty carts.

Therefore, we have proposed connecting members that are rotatably connected around a horizontal axis between the main body of the bogie and the leading part, and between the main body of the bogie and the tail part, and connect these connecting members to the main body of the bogie. The main body is configured so that it can be folded downward and inward, so that when the main body is empty and no objects are placed on it, the leading part and the tail part can be retracted into the inside of the main body to shorten the length of the main body. In this manner, the object is to provide a tow conveyor in which the buffer distance l is significantly shortened.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the tow conveyor 1 has a truck 2, and the truck 2 has a leading portion protruding in front of the truck body 5 on which a conveyed object 3 such as a white body can be placed. 6 and a rearwardly projecting tail 7. Also,
The cart body 5 has four wheels 9 with uniform casters mounted on a vertical shaft 1.
The wheels 9 are mounted rotatably around 0, and these wheels 9 are guided by rails 11 (see FIG. 5) installed on the floor F. Further, the leading portion 6 is made of a rod member, and rolling wheels 12 13 are connected to both ends of the rod member so as to be rotatable about a vertical shaft 14 , 15 , and these rolling wheels 12 are connected to the floor 2 . Rail installed under the surface 16.1
6.

A connecting member 17 is connected to the rear end of the leading rod member 6 so as to be rotatable about a horizontal axis 19, and the connecting member 17 expands into a V-shape and is connected to the main body 5 of the horizontal axis. They are rotatably connected around 20. On the other hand, tail 7
The rod member also has a mouth and a dome similar to the leading part 6, and rolling wheels 21.22 are connected to both ends of the rod member so as to be rotatable about a vertical shaft 23.25, and these rolling wheels 21.
22 is guided on the rail 16.16. and,
A connecting member 26 similar to the connecting member 17 is connected to the tip of the tail rod member 7 so as to be rotatable about a horizontal axis 27, and the tip of the connecting part 26 is also rotatable about a horizontal axis 29. is connected to the truck body 5.

As shown in detail in FIG. 2, a bin 30 is supported by the front rolling wheel 12 in a vertically slidable manner and biased downwardly by a spring 31. 3
0 has an actuating piece 32 fixed to it that projects forward. On the other hand, the rear rolling wheel 22 has a locking protrusion 3 that protrudes rearward.
3 is fixed, and the actuating piece 32 is fixed to the retaining protrusion 33.
The collision may cause the bin 30 to move upward.

Below the rail 16 is a chain support rail 35.
．． 35 is arranged (see Fig. 5), and the rail 35
The supporting rollers of the drive chain 36 and the engaging rolling elements 3
7 is being guided. The locking rolling elements 37 are arranged at every predetermined pitch of the chain 36, and the rolling elements 37 are provided with pushing dowels 39 and overrun prevention dowels 40, which are rotatable by pins 41 and 42, respectively. The bin 3 is placed in the position shown in FIG.
The lower end of 0 is engaged.

On the other hand, the lifting and lowering transfer (5) on the tow conveyor line B is carried out near the devices Ll and L2, that is, from the carriage body 5 to the long folding device □, 2id, and 2nd.

As shown in the figure and FIG. 5, a lift device 43 that lifts the truck body 5 from below, a feed device 45 that moves back and forth,
Then, the feed device 46 for the tail section 7 is released. The truck main body feeding device 45 has a parallel link 49° 49 pivoted on the bottom surface of a recess 47 formed as a base for the floor F, and the link 49
The plate 51 can be moved back and forth by a hydraulic cylinder 50 installed between the side surface of the recess 47 and the side surface of the recess 47 . Furthermore, the lift device 41 has two parallel lifting links 52.52 arranged on the left and right sides of the rail 16.35.
The upper plate 55 can be moved up and down by sliding one end thereof using two hydraulic cylinders 53. Furthermore, the upper plate 5
A mounting plate 57 is supported on the carriage body 5 via a spring 56, and the plate 57 can support the carriage body 5 from below. (6) In addition, the tail feed device 46 has a row actuator 59, and an arm 60 fixed to the actuator 59.
can abut the rear end (folding device Kl) or the front end (unfolding device 2) of the tail 7 to move the tail 7 forward or backward.

Since this embodiment has the above configuration, the trolley body 5
When transporting the cart 2 with the object 3 placed thereon, the cart 2 is in an extended state as shown in FIG. That is,
The connecting member 17.23 extends outside the truck body 5 and connects with the leading part 6 and the tail part 7, so that the truck 2 is slightly longer than the total length of the object to be transported. Then, the pin 30 of the front rolling wheel 12 engages between the pushing and overrun prevention doors 39 and 40 of the locking rolling element 37, which is fastened by the drive chain 36, and the rolling wheel 12 Therefore, the truck 2 is running and driven by the drive chain 36. Further, in the work process on the tow conveyor line B, when the preceding cart is stopped, the front rolling wheel 12 of the following cart 2 approaches the rear rolling wheel 22 of the preceding cart and protrudes forward. When the actuating piece 32 collides with the engaging protrusion 33 protruding rearward, the actuating piece 32 moves upward together with the pin 30 against the spring 31, and the pin 30 is moved upward by the pin 30.
9 and 40 are disengaged. As a result, the cart 2 is stopped and accumulated at that position. Also, when the leading truck moves,
The actuating piece 32 is disengaged from the engagement protrusion 33, and the pin 30 is moved downward again by the spring 31, and the overrun prevention door 40 of the moving engagement rolling element 37 is tilted by its slope, and the pin 30 is moved downward. is engaged with the pushing lever 39 to run and drive the trolley 2 again.

Then, the trolley 2 reaches the lifting/lowering transfer device L2 of the tow conveyor line B, transfers the transported object 3 of the trolley body 5 to the overhead conveyor line C, and when the trolley 2 reaches an empty state, the trolley 2 is folded. The device KIK can be folded. That is, when the truck 2 is placed on the folding device 1, the upper plate 55 of the lift device 43 is raised in parallel by the hydraulic cylinder 53, and the mounting plate 57 is further raised via the spring 56, and the truck 2 is lifted up by the hydraulic cylinder 53. Lift up the main body 5, and in this state, the hydraulic cylinder 50 moves the feeding device 45 forward to move the main body 5
forward, and the arm 60 of the tail feeder 46
rotates in the direction of the arrow in FIG. 4 to send the tail portion 7 forward.

As a result, the truck 2 is folded as shown in FIG. That is, the leading part connecting member 17 is connected to the horizontal axis 19.20.
The leading part 6 is retracted in the direction of the main body 5 of the main body 5, and the tail connecting member 26 is folded to be located inside the lower part of the main body 5 of the main body 5, centering on the horizontal axis 27.29. It is folded so that it is positioned downwardly and inwardly, and the front tail section is retracted in the 5 direction of the truck body. As a result, the empty truck is run and driven with the truck 2 being twice as long and shorter than both connecting members 17.26, and the pin 3
It is stopped and re-driven by the vertical movement of 0. Then, the folding release device 2 immediately before the conveyed object is placed on the carriage body is operated in the opposite direction to that described above, and the carriage 2 is returned to the extended state as shown in FIG. 1.

As explained above, according to the present invention, the connecting members 17 and 26 (9) connecting the truck body 5, the leading portion 6, and the tail portion 7 are folded downward and inwardly into the truck body. Since the length of the trolleys can be significantly shortened by two, the puffer distance I for running and accumulating empty trolleys can be set significantly shorter, and the total length of the tow conveyor line B can be shortened. and the associated conveyor line A.

The design of C is also facilitated. In addition, the overall length of the trolley 2 can be adjusted simply by changing the lengths of the connecting members 17 and 26, so even if the length of the transported object changes due to a change in vehicle model, etc., it is easy to do so without changing the entire trolley. Coupled with the fact that it is possible to deal with
The versatility of the conveyor line B can be improved.

[Brief explanation of the drawing]

Figure 1 is a side view of the trolley with objects placed on it, Figure 2 is an enlarged view of the front and rear rolling wheels, and Figure 3 is the trolley in its folded state. Side view, Figure 4■
(9) is a side view showing the truck folding (release) device, (9) is a plan view showing its tail feeding device, and FIG. 5 is a longitudinal sectional view thereof;
FIG. 6 is a plan view showing the conveyor (10) line. 1... Tow conveyor, 2... Trolley, 3...
・Transferred object, 5... Carriage body, 6... Leading part, 7... Tail part, 17... Connecting part, 19°20... Horizontal axis, 26... Connecting part, 27.2
9...Horizontal axis, B...Tow conveyor line applicant Daido Kogyo Co., Ltd. rll)

Claims (1)

[Claims] (1) In a tow conveyor equipped with a cart having a leading part in front of the main body on which conveyed objects can be placed, and a tail part in the rear, each rotation centering on a horizontal axis is provided between the main body of the cart and the leading part. A freely connected connecting member is interposed, and a connecting member rotatably connected around a horizontal axis is interposed between the truck body and the tail, and these connecting members are folded inside the lower part of the truck body. Tow conveyor configured to obtain.