KR20230134688A - Trolly conveyor apparatus equipped with shock absorbing device - Google Patents

Abstract

The present invention relates to an overhead type trolley conveyor device, particularly an upper guide rail (1) installed along a certain moving path in the upper space of a workshop;
A lower guide rail (2) installed in parallel along the same path as the upper guide rail (1) at regular intervals below the upper guide rail (1), is guided by the lower guide rail (2), and fixes the product. A carrier (5) equipped with a carrier dog (21) for transport, installed at a designated carrier stop position (S) on the lower guide rail, and the chain dog (12) located at the locking position (P1) ) and the carrier dog 21 of the carrier 5 that is coupled to the chain dog trolley 10 and moves with the chain dog trolley 10, and the chain dog 12 of the chain dog trolley 10 at the carrier stop position S. When the chain dog 12 is released from the carrier dog 21 by the cam plate 42 and the operation of the cam plate 42, it collides with the cam plate 42 and causes the carrier ( 5) includes a stopper pin (46) that stops the carrier at the carrier stop position (S), and when the stopper pin (46) collides with the cam plate (42), the It further includes a shock absorber (50) capable of absorbing and cushioning the shock transmitted to the lower guide rail (2).

Description

Trolley conveyor device with shock absorbing mechanism {TROLLY CONVEYOR APPARATUS EQUIPPED WITH SHOCK ABSORBING DEVICE}

The present invention relates to a trolley conveyor device, and in particular, in an automobile manufacturing plant, a guide rail is installed along a certain path, and while automobile parts are supported by hanging on a hanger, they move along the guide rail and then move along the guide rail's path. It relates to a trolley conveyor device provided with a shock absorbing mechanism that can absorb and cushion the shock caused by a collision between a member to be stopped and a member to be stopped when stopping at a predetermined stopping position.

In an automobile manufacturing plant, a product is moved along a guide rail installed along a certain path within the factory while supported on a hanger, stopped at a specific process work position, and the product is transported so that process work can be performed at that stopped position. A trolley conveyor device is provided.

As disclosed in Patent Document 1, such a trolley conveyor device generally includes an upper guide rail 23 for chain guidance along a certain path within a manufacturing plant, and a plurality of transfer trolleys 3 and 4 below the upper guide rail 23. A lower guide rail (2) is installed to guide ,5).

The transfer trolley provided on the lower guide rail (2) includes a front trolley (3), a middle trolley (4) connected to the front trolley (3) with a load bar (6), and a rear of the middle trolley (4). It includes a rear trolley (7) connected to a load bar (7), and the front trolley (3) is a chain provided on a chain trolley (22) on which a driven dog (10) moves along the upper guide rail (23). When engaged with the dog (24, referred to as a 'pusher' in the prior patent publication. Hereinafter referred to as a 'chain dog'), it moves along with the movement of the chain trolley 22 (the direction of movement is in the direction of the arrow), Accordingly, the hanger 9 and the product 8 supported on the hanger 9 also move.

The driven dog (10) of the front trolley (3) moving along the lower guide rail (2) is moved to the chain dog by the operation of a stopper mechanism (not shown) provided at the designated 'carrier stop position' of the guide rail (2). When the engagement with (24) is released, the chain trolley (22), which was moving along the upper guide rail (2), continues to proceed along the upper guide rail (2).

Conversely, the transport trolleys (3, 4, 5), including the front trolley (3), which is disengaged from the chain dog (24), stop at the stop position, but continue to move forward due to inertia and are fixed to the guide rail (2). It collides with an existing part, such as a stopper mechanism, and thus generates an impact.

This impact is transmitted to the hanger, front trolley, and product, causing damage to the product.

KR 10-0150410B

Accordingly, the present invention was designed to solve the above-described problems with the conventional trolley conveyor device. When the carrier carrying the product and moving along the guide rail stops at a fixed stop position on the path, the conveyor device is stopped due to inertia. The purpose is to provide a trolley conveyor device equipped with a shock absorbing mechanism that can absorb and cushion the shock that occurs when colliding with parts.

The present invention for achieving the above object is an overhead trolley conveyor device,

Upper guide rail installed along a certain movement path in the upper space of the workshop;

a lower guide rail installed in parallel along the same path as the upper guide rail at regular intervals below the upper guide rail;

A plurality of support frames are disposed at regular intervals along the longitudinal direction of the upper guide rail and the lower guide rail, each supporting frame fixing and supporting the upper and lower guide rails at an upper and lower portion;

A carrier guided by the lower guide rail, provided with a hanger for fixing and transporting a product, and provided with a carrier dog;

A trolley is guided on the upper guide rail, and is connected to a chain that moves along the upper guide rail by a chain drive means, between a locking position engaged with the carrier dog and an unlocking position where the carrier dog is released. A chain dog trolley provided with a chain dog pivoted to pivot and pivoted to the locking position by its own weight when no external force in an upward direction is applied to engage and couple with the carrier dog;

The carrier dog of the carrier is installed at a predetermined carrier stop position on the lower guide rail, is coupled to the chain dog located at a locking position, and moves with the chain dog trolley. At the carrier stop position, the chain of the chain dog trolley Dog and disengaging cam plate; and

When the chain dog is released from the carrier dog by the operation of the cam plate, a stopper pin collides with the cam plate and stops the carrier at the carrier stop position. In the overhead trolley conveyor device including,

It is characterized in that it further includes a shock absorber capable of absorbing and cushioning the impact transmitted to the lower guide rail through the cam plate when the stopper pin collides with the cam plate.

And, the shock absorbing mechanism is,

The shock absorbing mechanism is,

A guide rod fixed at both ends to a front fixed block and a rear fixed block installed on the left and right outer surfaces of the lower guide rail at regular intervals along the traveling direction of the carrier, respectively;

a movable block coupled to the outer periphery of the guide rod to which the cam plate is coupled and capable of sliding in the forward direction along the guide rod when an impact is applied to the cam plate in the forward direction; and

A shock absorber is inserted on the outer peripheral surface of the guide rod between the front fixed block and the movable block to absorb and cushion the shock transmitted to the front fixed block through the movable block.

The carrier includes a front carrier located at the front in a forward moving direction, a central front carrier connected to the rear of the front carrier by a front connecting rod, a central rear carrier connected to the rear of the central front carrier by an intermediate connecting rod, and A rear carrier connected to the central rear carrier with a rear connecting rod, and a hanger connected to the central carrier with a pair of hanger bars to secure the product;

The front carrier is characterized by being provided with the carrier dog and a check dog disposed to face the carrier dog.

The trolley conveyor device of the present invention is provided with a plurality of support frames fixedly installed at regular intervals along a predetermined path on the ceiling of a workshop, and each support frame has an upper part, a lower part, and a side part connecting the upper part and the lower part,

The upper guide rail is coupled to and supported on the upper part of the support frame,

The lower guide rail is coupled to and supported by the lower part of the support frame.

In addition, the cam plate is rotatably coupled to a rotating shaft provided on the side plate of the lower guide rail, and has an operating state in which the chain dog is moved to an unlocked position with the carrier dog and released from contact with the chain dog. It has a non-operating state that moves the chain dog to a locking position with the carrier dog by its own weight, and further includes an actuator that rotates the cam plate to the operating state or the non-operating state.

The actuator may be a pneumatic reciprocating cylinder or a rotating cylinder.

Another feature of the present invention is that the buffering force of the shock absorber can be adjusted by adjusting the gap between the front fixed block and the movable block on which the shock absorber is installed.

The stopper pin is provided to protrude laterally from the lower end of the front carrier, abuts the lower end of the cam plate when the cam plate is in an operating state, and contacts the cam when the cam plate is in an inoperative state. It is characterized in that it is provided in a position that passes through the cam plate rather than contacting the lower end of the plate.

Meanwhile, an auxiliary trolley may be connected to the front carrier.

According to the above-described invention, when a carrier moving along a guide rail with a product loaded on it stops at a fixed stop position along the path, it absorbs and cushions the shock generated when it collides with a stationary part of the conveyor device due to inertia, thereby preventing movement. It can prevent products being transported on a carrier from being broken or damaged by impact.

1 is a diagram showing the schematic configuration of a trolley conveyor device according to a preferred embodiment of the present invention.
Figure 2 is a cross-sectional view taken along line II in Figure 1.
Figure 3a is a diagram showing when the chain dog is located in the locked position with the carrier dog,
Figure 3b is a view showing when the chain dog is located in the unlocked position with the gap dog.
Figure 4a is a side view showing the shock absorber installed at the carrier stop position, showing the cam plate in an operating state.
Figure 4b is a top view of Figure 4a.
Figure 5a is a side view showing the shock absorber, showing the cam plate in a non-operating state.
Figure 5b is a top view of Figure 5a.
Figure 6 is an enlarged view of part 'C' of Figure 4b, showing the configuration of the shock absorber.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 1, an upper guide rail (1) is installed along a certain movement path in the upper space of the workshop, and the upper guide rail (1) and the upper guide rail (1) are installed along the same movement path below the upper guide rail (1). Lower guide rails (2) are installed in parallel at regular intervals.

As shown in Figures 1 and 2, the upper guide rail (1) and the lower guide rail (2) are each coupled to a plurality of support frames (3) arranged at intervals along the longitudinal direction and are positioned in the upper space of the workshop. Supported.

Each of the support frames 3 has an upper part 3a, a lower part 3b, and a side part 3c connecting the upper part 3a and the lower part 3b, and the upper guide rail 1 is It is supported by being coupled to the upper part (3a) of the support frame (3), and the lower guide rail (2) is coupled to and supported by the lower part (3b) of the support frame (3).

<Carrier (5)>

A carrier 5 is movably guided on the lower guide rail 2, and the carrier 5 fixes a product (not shown) such as an automobile body to a hanger and moves along the lower guide rail 2.

As shown in FIG. 1, the carrier 5 includes a front carrier 20 located at the front in the forward moving direction (bold arrow direction in FIG. 1), and a front connecting rod at the rear of the front carrier 20. A central front carrier 24 connected by 22), a central rear carrier 28 connected to the rear of the central front carrier 24 by an intermediate connecting rod 26, and a rear connecting rod to the central rear carrier 28 It may be configured to include a rear carrier 32 connected to (30), and a hanger 38 connected to the central carrier 34 with a pair of hanger bars 36 to load products.

In addition, the front carrier 20 is provided with a carrier dog 21 coupled to the carrier moving means in order to interlock with the carrier moving means, and a check dog 23 is provided at the rear of the carrier dog 21.

An auxiliary trolley 20-1 may be connected to the rear of the front carrier 20.

<Carrier transportation means>

The upper guide rail (1) is provided with carrier moving means for transporting the carrier (5) along the lower guide rail (2).

As shown in FIGS. 1 and 3, this carrier moving means includes a chain 4 moving along the upper guide rail 1 by a chain driving means (not shown), and a chain connected to the chain 4. It is provided with a dog trolley (10) and a chain dog (12) rotatably coupled to at least one of the chains (4) in the up and down directions about a pin.

As shown in FIG. 3A, in the section where there is no carrier stop mechanism 40, the chain dog 12 rotates downward around the pin by its own weight and is in a locking position ( It is located at P1).

The chain dog 12 is turned upward by the carrier stop mechanism 40 and moves to the unlocking position P2. Conversely, if the chain dog 12 does not receive force from the carrier stop mechanism 40, it rotates in a downward direction due to its own weight and moves to the locking position P1.

As shown in FIG. 3B, the chain dog 12, which was in the locking position P1 with the carrier dog 21, is in contact with the cam plate 42 and is released from the locking position P2 with the carrier dog 21. ), and as a result, the front carrier 20 of the carrier 5 is separated from the moving chain dog 12 and the movement is stopped.

<Carrier stop mechanism (40)>

The present invention, as shown in Figure 1, when the front carrier 20 moving along the lower guide rail 2 arrives at the 'carrier stop position (S)' on the lower guide rail 2, the front carrier ( Stopping the front carrier 20 and the entire carrier 5 including the front carrier 20 by releasing the chain dog 12 coupled to the carrier dog 21 of 20) from the carrier dog 21. A carrier stopping mechanism (40) is provided.

As shown in FIGS. 4A and 4B, the carrier stop mechanism 40 is installed at the ‘carrier stop position (S)’ and is switched from the ‘non-operating state (N)’ to the ‘operating state (O)’. (shown in FIG. 4A), or a cam plate 42 that switches from the operating state (O) to the non-operating state (N) (shown in FIG. 4B), and is connected to one end of the cam plate 42 and the cam It includes an actuator that rotates the plate 42 to the operating state (O) or the non-operating state (N).

The actuator may be composed of a cam-operated cylinder 45 or a rotating cylinder that expands and contracts by hydraulic or pneumatic pressure.

Cam plate(42)

The cam plate 42, in the 'operating state (O)' shown in FIG. 4A, swings the chain dog 12 from the locked position (P1) to the unlocked position (P2), thereby (12) is released from the carrier dog (21).

Conversely, as shown in FIG. 4B, the cam plate 42N in the 'non-operating state (N)' causes the chain dog 12 to rotate from the unlocked position (P2) to the locked position (P2) due to its own weight. To do this, the chain dog 12 that was supported is unsupported.

Hereinafter, an embodiment in which the actuator consists of a cam-operating cylinder 45 will be described. When the cam-operating cylinder 45 retracts, as shown in FIGS. 4A and 4B, the cam plate 42 It rotates to the operating state (O) (a state in which the chain dog (12) is released from the carrier dog (21)) centered on the fixing pin (41).

Conversely, as shown in FIGS. 5A and 5B, when the cam-operated cylinder 45 is extended, it is in a non-operated state (N) centered on the fixing pin 41 (the chain dog 12 is in a carrier dog ( Rotate to a state where the chain dog (12) is released so that it is caught by 21).

That is, as shown in FIGS. 5A and 5B, when the cam operation cylinder 45 is extended and the cam plate 42 is converted to the 'non-operating state (N)', the chain dog 12 is non-operating. Since it is not in contact with the cam plate 42N in an operating state, the chain dog 12 rotates downward to the locking position P1 by its own weight and is engaged and coupled to the carrier dog 21.

In this case, the chain dog 12 is engaged with the carrier dog 21 of the front carrier 20 and moves in the forward direction as the chain 4 moves to the chain drive means, thereby moving the carrier including the front carrier 20. (5) The entire thing is towed in the forward direction.

Conversely, as shown in FIGS. 4A and 4B, when the cam operation cylinder 45 is retracted and the cam plate 42 is converted to the operating state (O), the chain dog 12 is moved to the carrier stop position. When it reaches (S), it comes into contact with the cam plate (42O) in the operating state and rises to the unlocking position (P2),

Accordingly, the chain dog 12 is separated from the carrier dog 21 of the front carrier 20. At this time, the chain dog 12 continues to move in the forward direction along with the movement of the chain 4, but the carrier 5, including the front carrier 20, cannot move and stops at the carrier stop position (S). do.

As shown in FIGS. 3B and 4A, the cam plate 42O in the operating state rotates the chain dog 12 to the unlocking position P2 to release the locking state with the carrier dog 21. The movement of the front carrier 20 is stopped, and at the same time, the stopper pin 46 provided to extend laterally from the lower end of the front carrier 20 collides with the lower end of the cam plate 42, causing the front carrier 20 to stop moving. The carrier 20 is stopped from moving by inertia.

A reverse prevention bar 48 is provided to prevent the stopper pin 46 provided at the bottom of the front carrier 20 from moving backward when stopped.

<Shock absorber (50)>

The present invention absorbs and cushions the shock generated when the stopper pin 46 collides with the cam plate 42 when the carrier 5 including the front carrier 20 stops at the carrier stop position (S). Therefore, it is provided with a shock absorber 50 that can absorb and cushion the shock transmitted to the product through the entire carrier 5, especially the hanger 38.

As shown in FIGS. 4A and 4B and 5A and 5B, a front fixing block 51 and a rear fixing block 52 are provided on the left and right sides of the lower guide rail 2, respectively, to secure the front carrier 20. ) are installed at regular intervals along the direction of travel. A movable block 55 is provided between the front fixed block 51 and the rear fixed block 52 to slide along the guide rod 53, and the movable block 55 has the cam plate 42. It is combined.

And, as shown in FIG. 6, a shock absorber 50 is flexibly installed between the movable block 55 and the front fixed block 51. The shock absorber 50 absorbs and cushions the shock applied toward the front fixed block 51 through the movable block 55.

In addition, the shock absorber 50 is returned to its pre-charged state by the return spring 59 elastically installed between the movable block 55 and the front fixed block 51.

Preferably, as shown in FIGS. 4B and 6, the shock absorber 50 includes a cylinder 58 fixed to the front fixed block 55 and filled with oil therein, and one end of the movable block 55. ) and is supported in contact with the piston rod 57, the other end of which is provided with a piston (not shown) and is elastically supported by the oil of the cylinder 58.

In addition, the gap D between the front fixed block 51 and the movable block 55 can be adjusted with an adjustment screw 60. The buffering force can be adjusted by adjusting the gap (D) with the adjustment screw (60).

Hereinafter, the operation of the present invention configured as described above will be described.

<When the shock absorber 50 does not operate> (FIGS. 5A and 5B)

When the chain 4 moves along the upper guide rail 1 by a chain drive means (not shown), the chain dog 12 coupled to the chain 4 moves by its own weight as shown in FIGS. 1 and 3A. As shown, it is located in the unlocking position (P2) and moves together with the chain (4) with the carrier dog (21) engaged. Accordingly, the front carrier 20, the central carrier, the rear carrier 32, and the product are also moved on the hanger 38. In this case, the shock absorber 50 does not operate.

< When the shock absorber (50) operates>

When the chain dog 12 moves while coupled with the carrier dog 21 of the front carrier 20 and reaches the carrier stop position S, as shown in FIGS. 3B, 4A, and 4B, the chain dog ( 12) contacts the cam plate 42O in the operating state (O), rotates upward from the locking position (P1) to the unlocking position (P2), and is unlocked with the carrier dog 21.

Accordingly, the chain dog 12 continues to move in the forward direction along the moving chain 4 and passes the carrier stop position (S), and the carrier dog 21 is released from locking with the chain dog 12 and moves to the carrier. Stop at the stop position (S).

At this time, as shown in FIG. 4A, the stopper pin 46 provided at the lower part of the front carrier 20 hits the lower end of the cam plate 42O, and the front carrier 20 also stops.

In this way, the impact generated when the stopper pin 46 of the front carrier 20 collides with the lower end of the cam plate 42O is transmitted through the cam plate 42 to the movable block on which the cam plate 42 is installed. It is passed to (55). The shock absorber 50 absorbs and cushions the shock transmitted through the movable block 55.

S: Carrier stop position 1: Upper guide rail
2: Lower guide rail 3: Support frame
3a: top 3b: bottom
3c: side 4: chain
5: Carrier P1: Locking position
P2: Unlock position 10: Chain dog trolley
12: Chain dog 20: Front carrier
21: carrier dog 22: front connecting rod
23: Check dog 24: Center front carrier
26: middle connecting rod 28: central rear carrier
30: rear connecting rod 32: rear carrier
36: hanger bar 38: hanger
40: carrier stop mechanism 42: cam plate
O: Operating state of cam plate N: Non-operating state of cam plate
42O: Cam plate in operating state 42N: Cam plate in non-operating state
45: Cam operating cylinder 46: Stopper pin
48: Reverse prevention bar
50: Shock absorber 51: Front fixing block
52: Rear fixing block 53: Guide rod
55: movable block 57: piston rod
58: cylinder 59: return spring
60: Adjustment screw

Claims (8)

An overhead trolley conveyor device, comprising:
An upper guide rail (1) installed along a certain movement path in the upper space of the workshop;
a lower guide rail (2) installed below the upper guide rail (1) at regular intervals and in parallel along the same path as the upper guide rail (1);
A plurality of pieces are disposed at regular intervals along the longitudinal direction of the upper guide rail (1) and the lower guide rail (2), and each of the upper guide rail (1) and the lower guide rail (2) is located at the upper and lower parts. A support frame (3) for fixing and supporting;
A carrier (5) guided by the lower guide rail (2), provided with a hanger for fixing and transporting the product, and provided with a carrier dog (21);
A locking position ( P1) is pivoted to rotate between the carrier dog 21 and the locking release position (P2) where the lock is released, and when no external force in the upward direction is applied, the carrier swings to the locking position (P1) by its own weight. A chain dog trolley (10) having a chain dog (12) engaged and coupled with the dog (21);
The carrier of the carrier 5 is installed at a designated carrier stop position (S) on the lower guide rail, is coupled to the chain dog 12 located at the locking position (P1), and moves together with the chain dog trolley 10. a cam plate (42) for disengaging the dog (21) from the chain dog (12) of the chain dog trolley (10) at the carrier stop position (S); and
When the chain dog 12 is released from the carrier dog 21 by the operation of the cam plate 42, it collides with the cam plate 42 to move the carrier 5 to the carrier stop position (S). In the overhead type trolley conveyor device including a stopper pin (46) for stopping,
When the stopper pin 46 collides with the cam plate 42, a shock absorber 50 capable of absorbing and cushioning the shock transmitted through the cam plate 42; Equipped with an overhead trolley conveyor device. According to paragraph 1,
The shock absorption mechanism 50 is,
A guide rod whose both ends are coupled and fixed to the front fixing block 51 and the rear fixing block 52 installed on the left and right outer surfaces of the lower guide rail 2 at regular intervals along the traveling direction of the carrier 5, respectively. (53);
The cam plate 42 is coupled, and is coupled to the outer periphery of the guide rod 53 so that it can slide in the forward direction along the guide rod 53 when an impact is applied to the cam plate 42 in the forward direction. movable block 55; and
A shock that is inserted into the outer peripheral surface of the guide rod 53 between the front fixed block 51 and the movable block 55 and absorbs and cushions the shock transmitted to the front fixed block 51 through the movable block 55. An overhead trolley conveyor device equipped with a shock absorbing mechanism, characterized in that it includes an absorber (50). According to paragraph 1,
The carrier 5 includes a front carrier 20 located at the front in the forward moving direction, a central front carrier 24 connected to the rear of the front carrier 20 by a front connecting rod 22, and a central front carrier 24. A central rear carrier 28 connected to the rear of the carrier 24 by an intermediate connecting rod 26, a rear carrier 32 connected to the central rear carrier 28 by a rear connecting rod 30, and the central carrier ( 34) and includes a hanger (38) connected to a pair of hanger bars (36) to secure the product.
An overhead trolley conveyor device with a shock absorbing mechanism, characterized in that the front carrier (20) is provided with the carrier dog (21) and a check dog (23) disposed to face the carrier dog (21). . According to paragraph 1,
The cam plate 42 is rotatably coupled to the lower guide rail 2, and is in an operating state 42O that moves the chain dog 12 to an unlocked position with the carrier dog 21 or the chain dog 21. (12) and is switched to a non-operating state (42N) in which the chain dog (12) is moved by its own weight to the locking position (P1) with the carrier dog (21),
An overhead trolley conveyor device with a shock absorbing mechanism further comprising an actuator that rotates the cam plate (42) to the operating state (42O) or the non-operating state (42N). According to paragraph 4,
An overhead trolley conveyor device with a shock absorption mechanism, wherein the actuator is a pneumatic cam-operated cylinder (45) or a rotating cylinder. According to paragraph 1,
A shock absorbing mechanism provided with an adjustment screw 60 that can adjust the buffering force by adjusting the gap D between the front fixed block 51 and the movable block 55, where the shock absorber 50 is installed. An overhead trolley conveyor device equipped with a. According to paragraph 3,
The stopper pin 46 is provided to protrude laterally from the bottom of the front carrier 20, and when the cam plate 42 is in the operating state (O), the stopper pin 46 is in the operating state (O). abuts the lower end of the cam plate 42O, and passes through the cam plate 42N without contacting the lower end of the cam plate 42 when the cam plate 42 is in an inoperative state (42N). An overhead trolley conveyor device equipped with a shock absorbing mechanism. According to paragraph 3,
An overhead trolley conveyor device with a shock absorbing mechanism, characterized in that an auxiliary trolley is connected to the front carrier (20).

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