JPH0355345B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to power and free conveyors.

Conventional technology Conventionally, a power line, a free line arranged to overlap with the power line, a large number of pushers that can swing vertically and move together with the drive chain on the power line side, and a free line on the free line side are used. Power-and-free conveyors are already well known, which include an engagement dog provided on a free trolley of the carrier and an anti-coast dog provided on the free trolley opposite the engagement dog. It is used to automate flow production. In this conveyor line, carriers are merged or branched depending on the processing line for the conveyed objects, or the pushers that pull the carriers are switched.

Problems to be Solved by the Invention However, in the past, in the case of such carrier merging, branching, and pusher switching, power-and-free devices such as carrier stopping devices were not used.
Since a conveyor and other equipment are used, there are problems in that the equipment cost is very high and a large space is required.

Therefore, recently there has been a demand for a power-and-free conveyor that can switch pushers or merge or branch carriers without requiring any special equipment other than the power-and-free conveyor. .

The purpose of the present invention is to solve the above-mentioned problems of the prior art and to meet the above-mentioned needs.The purpose of the present invention is to solve the problems of the prior art described above and to meet the above-mentioned needs. I can do it,
Furthermore, the object is to provide a power-and-free conveyor which has a very simple structure and therefore has a very low equipment cost.

Means for Solving the Problems In order to achieve the above object, the present invention includes first and second power lines that are partially arranged in parallel, and a power line that straddles both power lines and overlaps above them. The free line is arranged like this, the numerous pushers that can swing up and down move together with the drive chains on both power lines, and the free line.
It is equipped with an engagement dog provided on the free trolley of the carrier on the line side and engaged with the pusher, and a coasting prevention dog provided on the free trolley opposite to the engagement dog. The pusher is formed into a substantially T-shape when viewed from the front by the mounting portion and the engaging portion provided horizontally at the tip thereof,
The horizontal engagement portion of the pusher is constituted by a central portion having a dog locking surface at the rear end, and left and right side portions having an overtaking dog passing slope surface at the upper end,
The engaging dog includes a pair of left and right vertical engaging parts provided on the free trolley at a predetermined distance from each other, and a pusher pressing slope is provided at the lower end of each of the left and right vertical engaging parts. , the tip of the coasting prevention dog is held at a level where it comes into contact with the overtaking dog passage slope on both left and right sides of the pusher horizontal part, and the horizontal engagement part of the pusher engages the left and right vertical engagement of the engagement dog. A power and free conveyor is adapted to be engaged with at least one of the parts.

Embodiments and Operations Next, embodiments of the present invention will be described based on the drawings. The embodiments show the case where the present invention is applied to an underfloor type power and free conveyor.

In this specification, front, rear, left and right refer to the first
Based on the drawings, the front refers to the left side of the drawing, the back refers to the right side of the drawing, the left refers to the front side of the sheet of drawing paper in the drawing, and the right refers to the back side of the same drawing.

1 to 3 show a conveyor according to the invention, in which one free line 21 has a carrier 2.
0 to the power line 1 placed below this
This figure shows the case where a large number of pushers 5 on the side are moved vertically.

A number of pushers 5 on the power line 1 side move together with the drive chain 4. Also, on the carrier 20 free trolley 23 on the free line 21 side,
An engagement dog 25 and an opposite coasting prevention dog 26 are provided.

Each pusher 5 is formed into a substantially T-shape when viewed from the front by a mounting portion 6 attached to the power trolley 3 by a pivot 10 and an engaging portion 7 provided horizontally at the tip thereof. In addition, the center part 7a of the engaging part 7 is made thick and has a dog locking surface 8 at the rear end, and the left and right side parts 7b and 7c are made thin and have a wall extending forward from the rear edge. It has inclined surfaces 9, 9 for overtaking dog passage which are sloped upward obliquely toward the vehicle.

Each engagement dog 25 has a horizontal connection 2 integrally provided with the front free trolley 23 of the carrier 20.
5a and vertical engaging portions 25b and 25c connected to the left and right sides thereof, it forms a gate shape when viewed from the front. A pusher pressing slope 28 is provided at the lower end of each of the vertical engaging portions 25b, 25c and has a slope that rises obliquely toward the front.

Note that both the left and right vertical engaging portions 2 of the engaging dog 25
Pusher 5 from the side on each tip of 5b, 25c
A pusher pushing slope 29 is provided on both left and right sides 7 of the horizontal engaging portion 7 of the pusher 5.
A side collision prevention inclined surface 11 that comes into contact with the above-mentioned inclined surface 29 is provided at the tip of each of b and 7c. The angle of these inclined surfaces 28, 11 is generally 30 to 45 degrees.

The front free trolley 23 has an engagement dog 25.
A coasting prevention dog 26 is provided so as to be opposite to and at a required interval. The tip 26a of the coasting prevention dog 26 is connected to the pusher horizontal engagement portion 77.
The left and right sides 7b, 7c of the overtaking dog are held at a level where they come into contact with the overtaking dog passing inclined surfaces 9, 9.
Further, pusher pushing slopes 29 for pushing down the pusher 5 from the side are provided on both left and right sides of the tip of the inertia prevention dog 26.

An accumulation cam 27 is attached to the rear free trolley 24 of the carrier 20.
This cam 27 is rod-shaped, and is provided with an inclined surface 30 at its rear end for holding down the pusher 5 from the rear, and slopes on both left and right sides of the lower end of the cam 27 for holding down the pusher 5 from the side. A surface 31 is provided.

In the normal conveyance state of the carrier 20, the horizontal engaging portion 7 of the pusher 5 is engaged with the left and right vertical engaging portions 25b, 25c of the engaging dog 25.

Figures 4 to 7 show one free line 2.
This figure shows a case where one carrier 20 is transferred by pushers 5A and 5B of two different power lines 1A and 1B.

The configurations of both pushers 5A and 5B are the same as pusher 5 shown in FIG.

First, in FIGS. 4 to 6, the conveyor has first and second power lines 1A, 1B partially arranged in parallel, and both power lines 1A, 1B.
The free line 21 is arranged so as to extend over and overlap the upper side of these. A large number of pushers 5A, 5B on both power lines 1A, 1B side, which are vertically swingable, move together with the drive chain 4. The front free trolley 23 of the carrier 20 on the free line 21 side has pushers 5A and 5B.
An engagement dog 25 that engages the engine, and a coasting prevention dog 26 that opposes the engagement dog 25 are provided.

The first and second free lines 1A and 1B are respectively equipped with power rails 2A and 2B made of a pair of left and right channel steel, and the free line 21 is equipped with a free rail 22 made of a pair of left and right channel steel. We are prepared. In the parallel portion P of the first and second power lines 1A and 1B, both power lines
Lines 1A and 1B portions are arranged on both left and right sides of the free line 21.

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

First, up to the power line parallel portion P, as shown in FIG. Vertical engagement portions 2 on both left and right sides of the engagement dog 25 of the carrier 20
5b and 25c, the carrier 20
is being transported. When the carrier 20 approaches the power line parallel portion P, the first power line 1
A shifts (displacement) with respect to free line 21
Therefore, as shown in Figure 6, pusher 5
The left side 7b of the horizontal engaging portion 7 of A is the engaging dog 2.
5 is engaged with the right vertical engagement portion 25c. On the other hand, the pusher 5 of the second power line 1B
B moves in a free state until it reaches the power line parallel portion P.

Next, after passing the power line parallel part P, the first power line 1A becomes the free line 2.
1, pusher 5A and engagement dog 2
5 is disengaged from the right vertical engaging portion 25c, leaving the carrier 20. Then, the pusher 5B of the second power line 1B is engaged with the vertical engagement portion 25b on the left side of the engagement dog 25 of the carrier 20 at the power line parallel portion P, and the carrier 20 then engages with the pusher 5B of the second power line 1B. It is towed and moved by 5B. Note that after passing the power line parallel portion P, the second power line 1B is located directly below the free line 21, so the horizontal engagement portion of the pusher 5B is 7 left and right side portions 7b, 7c are engaged with both left and right vertical engaging portions 25b, 25c of the engaging dog 25.

The moving speeds of the pushers 5A and 5B of the first power line 1A and the second power line 1B may be equal to each other, or one may be fast and the other slow;・Line 1A, 1
The carrier 20 can be transferred regardless of the speed difference between the B pushers 5A and 5B.

That is, first, the first power line 1A and the second
Of course, there is no problem if the pushers 5A and 5B of the power line 1B have the same speed.

Next, pusher 5 of the first power line 1A
A is slow, second power line 1B pusher 5
Even if B is fast, there is no problem because the carrier 20, which is being fed into the power line parallel portion P by the slow pusher 5A, is taken away by the latter fast pusher 5B.

Finally, the pusher 5 of the first power line 1A
A is fast, second power line 1B pusher 5
If B is slow, the latter slow pusher 5B enters the power line parallel section P first, and when the carrier 20 pulled by the fast pusher 5A enters the parallel section P later, the second pusher 5B enters the parallel section P of the power line first. As shown in FIG. 7, the upper end of the slow pusher 5B is pressed down by the pusher pushing slope 28 on the front side of the engagement dog 25 of the carrier 20, and the lower end 26a of the coasting prevention dog 26 is pushed downward. 5B's horizontal engaging portion 7 comes into contact with the overtaking dog passing inclined surface 9 and is pressed downward.
Carrier 20 passes Pushiya 5B. Then, after passing the power line parallel portion P, the fast pusher 5A of the first power line 1A leaves the carrier 20 behind, so the second power line
Since the slow pusher 5B of the power line 1 subsequently catches up and continues towing and transporting the carrier 20, no problem occurs.

In addition, the pusher 5 of the first power line 1A)
Carrier 20 pulled by A and the second power
If pusher 5B of line 1B enters the power line parallel part P at the same time, carrier 2
Pusher pushing slopes 29, 30, 32 are provided on both left and right sides of the 0 engagement dog 25, coasting prevention dog 26, and accumulation rate cam 27, respectively.
Since the pusher 5B comes into contact with the side collision prevention inclined surfaces 11 provided at both left and right ends of the horizontal portion 7 of the pusher 5B and pushes the pusher 5B downward, no side collision occurs.

A rod-shaped accumulation rate cam 27 provided on the rear free trolley 24 of the carrier 20 is connected to the first
As shown by the dashed line in the figure, the following carrier 20
When the gate-shaped engaging dog 25 approaches, it is inserted between the left and right vertical engaging parts 25b and 25c, and the rear end inclined surface 31 presses the center part of the following pusher 5 downward. When the rear carrier 20 is pushed in, the engagement between the rear carrier 20 and the pusher 5 is disengaged, and the succeeding carrier 20 is accumulated.

Although not shown, the power and
According to And Free Conveyor, Carrier 2
Merging and branching of 0 can also be performed in the same manner as in the above embodiment.

In the above embodiment, the present invention was applied to an underfloor power and free conveyor, but the present invention also applies to an overhead type power and free conveyor. It can be applied in exactly the same way, only that the arrangement relationship of the pushers 5 and the gravity relationship of the pusher 5 are upside down.

The carrier 20 shown in the figure is equipped with a pair of front and rear free trolleys 23, 24, but if the object to be conveyed is long, it may be connected between the front and rear pair of free trolleys 23, 24. Two intermediate free trolleys are arranged and the carrier 20
transport platforms may be supported by these intermediate free trolleys.

Effects of the Invention As described above, the power and free conveyor according to the present invention includes first and second power lines that are partially arranged in parallel, and a power line that straddles both power lines and overlaps above them. A free line arranged as shown in FIG. It is equipped with an engagement dog and a coasting prevention dog provided on the free trolley so as to face the engagement dog, and each pusher has a mounting portion and a horizontally provided dog at the tip of the pusher. The horizontal engaging part of the pusher has a central part having a dog locking surface at the rear end;
The engaging dog has a pair of left and right vertical engaging parts provided at a predetermined distance from each other on the free trolley. , pusher holding slopes are provided at the lower ends of both the left and right vertical engaging parts, and the tips of the coasting prevention dogs are held at a level where they come into contact with the overtaking dog passage slopes on both left and right sides of the pusher horizontal part. Since the horizontal engaging portion of the pusher is engaged with at least one of the left and right vertical engaging portions of the engaging dog, it is possible to use a conveyor other than the conventional power and free conveyor. It is possible to reliably switch pushers or merge or branch carriers without the need for special equipment, and the simple shapes of the power line pushers and free line engagement dogs make the structure simple. is very simple and therefore the equipment cost is very low. In addition, there is an effect that the carrier can be reliably conveyed regardless of the speed difference between the pushers of two different power lines.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially omitted enlarged left side view of the conveyor portion where the power line and free line 21 overlap vertically, and FIG.
The figures are a cross-sectional view along the line of Fig. 1, Fig. 3 is an enlarged perspective view of the pusher, and Fig. 4 is a schematic partial plan view of the conveyor section in which two power lines are arranged for one free line. , FIG. 5 is a left side view of FIG. 4, FIG. 6 is an enlarged sectional view taken along the line shown in FIG. 5, and FIG. 7 is a partially enlarged side view of the same conveyor.
This shows the case where Pushsia is overtaken. 1, 1A, 1B...Power line, P...Power line parallel portion, 2, 2A, 2B...Power rail, 3...Power trolley, 4...Drive chain, 5, 5A, 5B... ...T type pusher, 6...
... Attachment part, 7 ... Horizontal engagement part, 7a ... Center part, 7b, 7c ... Left and right side parts, 8 ... Dog locking surface, 9 ... Inclined surface for overtaking dog passage, 11 ...
Slanted surface for side collision prevention, 20...Carrier, 21
...Free Line, 22...Free Rail,
23... Front free trolley, 24... Rear free trolley, 25... Portal engagement dog, 25a...
...Horizontal connecting portion, 25b, 25c...Vertical engagement portion, 26...Dog for preventing coasting, 27...Cam for accumulation, 28, 29, 30... Sloped surface for pushing the pusher.

Claims (1)

[Claims] 1. First and second power lines 1A and 1B partially arranged in parallel, and both power lines 1
A free line 21 which is arranged to span A and 1B and overlap above these, and a large number of pushers 5A and 5B which are vertically swingable and move together with the drive chain 4 on both power lines 1A and 1B.
and pushers 5A, 5 provided on the free trolley 23 of the carrier 20 on the free line 1 side.
an engagement dog 25 that engages with B;
A coasting prevention dog 26 is provided on the free trolley 23 so as to face the free trolley 23. The horizontal engaging portions 7 of the pushers 5A and 5B have a central portion 7a having a dog locking surface 8 at the rear end, and an overtaking dog passage portion at the upper end. The engagement dog 25 is configured by left and right side parts 7b and 7c having inclined surfaces 9 and 9, and the engagement dog 25 is connected to the free trolley 2.
3 is provided with a pair of left and right vertical engaging portions 25b, 25c provided at a predetermined distance from each other, and a pusher pressing slope 28 is provided at the lower end of each of the left and right vertical engaging portions 25b, 25c. , the tip 26a of the coasting prevention dog 26 is held at a level where it comes into contact with the overtaking dog passing inclined surfaces 9, 9 of the left and right sides 7b, 7c of the pusher horizontal portion 7, and the pushers 5A, 5B are horizontally engaged. A power and free conveyor in which the portion 7 is engaged with at least one of the left and right vertical engaging portions 25b and 25c of the engaging dog 25. 2 Left and right vertical engaging portions 25 of the engaging dog 25
pusher 5A from the side on each tip of b, 25c,
A pusher pushing slope 29 for holding down the pushers 5B is provided, and pusher pushing slopes 30 for holding down the pushers 5A and 5B from the sides are provided on both left and right sides of the tip of the coasting prevention dog 26. , 5B. A conveyor according to claim 1, wherein the left and right side portions 7B, 7c of the horizontal portion 7 of the horizontal portion 7 are each provided with a side collision prevention inclined surface 11 which abuts the inclined surfaces 29, 30.