KR20230160414A - Trolly conveyor apparatus equipped with shock absorbing device - Google Patents

Abstract

The present invention relates to an overhead trolley conveyor device, and in particular to a shock absorbing mechanism (50) that absorbs and cushions the shock applied to the stop lever (43) when the carrier device (100) stops at the stop position (P). It relates to an overhead trolley conveyor device including:
The overhead type trolley conveyor device of the present invention is such that the front carrier 10 of the carrier device 100 is at the stop position (P) and the stopper pin 17 of the front carrier 10 is connected to the stopping portion of the stop lever 43 ( 42), the shock applied to the stop lever 43 is absorbed and cushioned by the shock absorber 56.

Description

Overhead carrier type trolley conveyor device with shock absorbing mechanism {TROLLY CONVEYOR APPARATUS EQUIPPED WITH SHOCK ABSORBING DEVICE}

The present invention relates to an overhead carrier type (OVER HEAD CARRIER TYPE) trolley conveyor device. In particular, a guide rail is installed along a certain path in an automobile manufacturing plant, and the guide rail is supported by hanging automobile parts on a hanger. An obohead carrier-type trolley conveyor equipped with a shock absorbing mechanism that can absorb and cushion the shock caused by a collision between the member to be stopped and the member to be stopped when moving along the guide rail and stopping at a fixed stop position on the path of the guide rail. It's about devices.

In an automobile manufacturing plant, a hanger loaded with a product is moved along a guide rail installed on the factory ceiling along a certain path within the factory, stopped at a specific process work position (stop position), and process work is performed at that stop position. An overhead carrier type trolley conveyor device is provided to transport the product.

It is known that such a trolley conveyor device is disclosed in Patent Document 1, for example. As described in the publication of Patent Document 1, a conventional trolley conveyor device such as the one disclosed in Patent Document 1 includes an upper guide rail for chain guidance along a certain path within a manufacturing plant, and a plurality of upper guide rails on the lower side of the upper guide rail. A lower guide rail is installed to guide the two transport trolleys.

The transfer trolley provided on the lower guide rail includes a front trolley, a middle trolley connected to the front trolley with a load bar, and a rear trolley connected to the rear of the middle trolley with a load bar, and the front trolley has a driven dog on the upper side. When engaged with a chain dog (referred to as a 'pusher' in the prior patent publication; hereinafter referred to as a 'chain dog') provided on a chain trolley moving along a guide rail, it moves along with the movement of the chain trolley ( The direction of movement is in the direction of the arrow), and the hanger and the product supported on the hanger also move accordingly.

When the driven dog of the front trolley, which was moving along the lower guide rail, is disengaged from the chain dog by the operation of the stopper mechanism (not shown) provided at the designated 'stop position' of the guide rail, it moves along the upper guide rail. The chain trolley continues to proceed along the upper guide rail.

Conversely, the transport trolley, including the front trolley that is disengaged from the chain dog, stops at the stop position, but continues to move forward due to inertia and collides with parts fixed to the guide rail, such as the stopper mechanism, resulting in shock. do.

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-mentioned 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 carrier type trolley conveyor device equipped with a shock absorption mechanism,

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 and spaced apart from the lower side of 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 drive comprising a plurality of chain trolleys guided on the upper guide rail, a chain that connects the chain trolleys and moves along the upper guide rail by a chain drive means, and a chain dog connected between two adjacent chain trolleys. chain; and

and a front carrier having at least one support roller that rolls along the lower guide rail, wherein the front carrier has a body, a locking position in engagement with a chain dog of the drive chain, and a locking position that is unlocked from the chain dog. A hook installed on the body so as to be rotatable between unlocking positions, a stopper pin provided on the hook, and when the front carrier reaches a stop position on the guide rail, the hook is switched from the locked position to the unlocked position. In the overhead type trolley conveyor device including, a carrier device including an operating lever that returns the hook to the hooked position in the carrier non-stop position,

One end is pivotably coupled to the guide rail through a bracket to pivot and rotate between a stopper pin engaging position on the stopper pin and a stopper pin unlocking position that is released from the stopper pin, and the front end has the stopper pin. A carrier stop mechanism provided with a stop lever having a locking portion for locking and fixing; and,

When the front carrier of the carrier device reaches the stop position and the stopper pin is caught in the locking portion of the stop lever and the carrier stops, a shock absorber that absorbs and cushions the shock transmitted to the front carrier through the stopper pin. It is characterized by further including a mechanism.

The shock absorbing mechanism is,

A front fixing plate fixed to the support frame, a rear fixing plate fixed to the guide rail at a constant interval behind the front fixing plate, and at least one guide provided in the longitudinal direction of the guide rail between the front fixing plate and the rear fixing plate. A rod is provided to slide along the guide rod, a slide block connects the rear end of the stop lever, and is installed between the slide block and the front fixing plate, so that when the front carrier stops, it passes through the stop lever. It is characterized in that it includes a shock absorber that cushions the impact transmitted to the slide block.

The shock absorber includes a cylinder fixed to the front fixing plate, one end of which is supported on the slide block, a support rod that extends to be slidably movable inside the cylinder and is supported by a support means inside the cylinder, and the slide block and the front. It is characterized in that it includes a spring installed on the outer circumference of the support rod between the fixing plates.

It is characterized by further including an adjustment screw for adjusting the gap between the front fixing plate and the slide block.

The carrier device includes a central front carrier connected to the rear of the front carrier by a front connecting rod, and a central rear carrier connected to the rear of the central front carrier by an intermediate connecting rod.

The operating lever is characterized in that it pivots between a raised position that moves the hook to the locked position and a lowered position that returns the hook to the unlocked position.

The operating lever is characterized in that it pivots to the raised position when engaged with a cam attachment provided at the rear end of the preceding carrier device, and pivots to the lowered position by its own weight when separated from the cam attachment.

The support roller provided on the front carrier consists of two support rollers installed on the body of the front carrier at intervals along the moving direction of the front carrier, and the front carrier is installed on the lower side of each support roller in the longitudinal direction of the lower guide rail. Left and right guide rollers are installed to guide.

According to the above-described invention, when the carrier, which is moving along the guide rail with the product mounted on it, stops at a fixed stop position along the path, the impact generated when it collides with the stationary part of the conveyor device due to inertia is absorbed and cushioned, so that the carrier moves. It can prevent products being transported on a carrier from being broken or damaged by impact.

1 is a diagram schematically showing the overall configuration of a trolley conveyor device according to a preferred embodiment of the present invention.
FIG. 2 is a view taken in direction II of FIG. 1.
Figure 3 is a diagram showing a state in which the chain dog is engaged with the hook of the front carrier at a position (non-stop position) before the front carrier of the carrier reaches the stop position of the guide rail;
Figure 4 is a diagram showing a state in which the chain dog is positioned in a locking position engaged with the hook of the front carrier at a position before the front carrier of the carrier reaches the stop position of the guide rail (non-stop position);
Figure 5 is a diagram schematically showing the structure of a shock absorbing mechanism installed in a stationary position, and is a diagram showing a state in which the shock absorbing mechanism is not performing a buffering operation.
Figure 6 is an enlarged detailed view of the shock absorption mechanism of Figure 5.
Figure 7 is a diagram showing a state in which the shock absorbing mechanism performs a cushioning operation when the front carrier is located at a stop position.

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

1 is a diagram schematically showing the overall configuration of a trolley conveyor device according to a preferred embodiment of the present invention. Hereinafter, the trolley conveyor device of the present invention will be described by configuration.

<Guide rail (1,2)>

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 to support the upper space of the workshop. is installed in

Each of the support frames 3 has an upper part 3a, a lower part 3b and a side part 3c, and the upper guide rail 1 is coupled to the upper part 3a of the support frame 3. Supported, the lower guide rail 2 is coupled to both sides 3c of the lower part of the support frame 3, respectively.

A 'stop position P' at which the carrier device 100 stops is set on the lower guide rail 2. A carrier stop mechanism 40 is provided to stop the carrier device 100 at this stop position P. The configuration and operation of this carrier stopping mechanism 40 will be described in detail later.

<Drive chain (4)>

As shown in FIG. 1, the drive chain 4 is provided to be movable along the upper guide rail 1. The drive chain (4) includes a plurality of chains (5) connected in series, a chain trolley (7) that movably supports the chain (5) on the upper guide rail (1), and two chains (5) It includes at least one chain dog 6 connected between them. When the chain dog 6 is connected between chains to which the chain trolley 7 is coupled, it can effectively support the load of the carrier acting on the chain dog 6, and the chain connecting the chain dog 6 ( 5) It is possible to prevent the carrier from being released from the chain dog (6) by sagging downward due to the load of the carrier.

<Carrier device (100)>

In FIG. 1, reference numeral 100 refers to a carrier device. As shown in FIG. 1, the carrier device 100 supports a product (not shown), such as an automobile body, on a hanger (not shown) so that it can move along the lower guide rail 2.

When the carrier device 100 is engaged with the chain dog 6 and the drive chain 4 moves, the carrier device 100 moves along the lower guide rail 2 by the moving drive chain 4. do. On the other hand, when the carrier device 100 is disengaged with the chain dog 6, the carrier device 100 is attached to the lower guide rail 2 at the disengaged position (corresponding to the stop position P). Stop.

As shown in FIG. 1, the carrier device 100 includes a front carrier 10 located at the front front in the forward movement direction (arrow direction in FIG. 1), and a front connecting rod at the rear of the front carrier 10. A central front carrier (20F) connected by (20-1), a central rear carrier (20R) connected to the rear of the central front carrier (20F) by an intermediate connecting rod (20-2), and the central rear carrier (20R) It includes a rear carrier (30) connected to the rear by a rear connecting rod (20-3). A hanger (not shown) connected to a pair of hanger bars 36 to secure the product is provided between the central front carrier 20F and the central rear carrier 30.

The front carrier 10 has a body 11 with at least one support roller 8 rolling along the lower guide rail 2, as shown in FIGS. 1 and 2 . A hook 12 that engages with the chain dog 6 of the drive chain 4 is provided at the top of the body 11. A stopper pin 17 is provided at the front end of the hook 12 in the transverse direction with respect to the moving direction of the carrier device. The support roller 8 consists of two support rollers 8 installed on the body of the front carrier at intervals along the moving direction of the front carrier. Left and right guide rollers 8a are installed below each support roller 8 to guide the front carrier 10 in the longitudinal direction of the lower guide rail 2.

The hook 12 is pivotably coupled to the top of the body 11 with a first pivot pin 13. The hook 12 has an operating lever 15 installed at the bottom of the body 11 to be able to pivot around the second pivot pin 14. The operating lever 15 is connected to the front of the hook 12 by a link 16 at the rear end.

As shown in FIG. 3, when the operating lever 15 is lowered to the lowered position (L) by its own weight, the hook 12 has a locking protrusion 12a connected to the chain dog 6 by the link 16. It rotates to the engaged position (hereinafter referred to as ‘locked position (O2)’). As shown in FIG. 3, when the hook 12 is raised to the locking position, the locking protrusion 12a of the hook 12 is engaged with the chain dog 6 of the drive chain 4, so that the drive chain 4 ), the carrier device 100 including the front carrier 10 moves according to the movement.

Meanwhile, as shown in FIG. 4, when the operation lever 15 is raised to the raised position H by the cam attachment 9 provided at the rear end of another preceding carrier device, the hook 12 is The locking step 12a is lowered by the link 16 to a position where it is disengaged from the chain dog 6 (hereinafter referred to as the 'locking release position O1').

<Carrier stop mechanism (40)>

The present invention, as shown in Figure 1, the front carrier 10 of the carrier device 100 moving along the lower guide rail 2 arrives at the stop position P' on the lower guide rail 2 , a carrier that stops the carrier device 100 at its stop position P when the hook 12 of the front carrier 10 is released from the chain dog 6 by operation of the operating lever 15. A stopping mechanism (40) is provided.

The carrier stop mechanism 40 is installed at a defined stop position P of the guide rails 1 and 2, as shown in FIGS. 1 and 5. The carrier stop mechanism 40 operates to stop the carrier device 100 at the stop position P (FIG. 7) or is in a state of not stopping the movement of the carrier device 100 (shown in FIG. 5). situation).

As shown in FIGS. 5 and 6, the carrier stopping mechanism 40 has a bracket 41 attached to the rear fixing plate 52 fixed to the upper guide rail 1 and the lower guide rail 2. A stop lever 43 is pivotally coupled to the bracket 41 and can pivot up and down, and has a locking portion 42 at the front end in the longitudinal direction on which the stopper pin 17 of the hook 12 is fixed, and a stop lever 43 on the upper side. A stop cylinder (44) installed on the guide rail (1) and telescopically operated, and a link that switches the stop lever (43) to the operating state (O) or non-operating state (N) when the cylinder (44) is expanded or retracted. Includes Baa (45).

<Operation of carrier stop mechanism 40>

As shown in FIG. 7, the stop cylinder 44 is retracted to stop the front carrier 10, which has reached the stop position P, at the stop position P with the carrier stop mechanism 40. When this happens, the stop lever 43 returns to the operating state (O).

In this state, the locking portion 42 of the stop lever 43 is released from the chain dog 6 and hangs the stopper pin 17 of the separated hook 12 to move the front carrier 10 to the stop position (P). Stop at (see Figure 7).

<Shock absorption mechanism>

When the carrier device 100, including the front carrier 10, stops at the stop position P, the stopper pin 17 collides with the locking portion 42 of the stop lever 43. It is provided with a shock absorption mechanism 50 that can absorb and cushion the shock.

As shown in FIGS. 5 to 6, this shock absorbing mechanism 50 is provided with a front fixing plate 51 on the left and right sides of the lower guide rail 2, respectively, and along the moving direction of the carrier device 100. A rear fixing plate 52 installed at regular intervals, a slide block 54 movably installed on a pair of guide rods 53 provided at least between the front fixing plate 51 and the rear fixing plate 52, and , It is configured to include a shock absorber 56 and a spring 55 elastically installed between the slide block 54 and the front fixing plate 51.

The shock absorber 56 absorbs and cushions the shock applied toward the front fixing plate 51 through the slide block 54 when the front carrier 10 stops.

In addition, the shock absorbing mechanism 50 is returned to its pre-buffered state by a spring 55 elastically installed between the slide block 54 and the front fixing plate 51.

Preferably, as shown in FIG. 6, the shock absorber 56 includes a cylinder 61 fixed to the front fixing plate 51, and one end of the shock absorber 56 is attached to the slide block 54. A support bar 63 supported and slidably extended inside the cylinder 61 and supported by a support means inside the cylinder, and a support bar 63 between the slide block 54 and the front fixing plate 51. It is installed on the outer periphery and includes a spring 55 that returns the support rod 63 to its initial extended state.

In addition, the gap D between the front fixing plate 51 and the slide block 54 can be adjusted with an adjustment screw 64. The buffering force can be adjusted by adjusting the gap (D) with the adjustment screw.

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

<Operation of shock absorbing mechanism 50>

The stop cylinder 44 is operated to lower the stop lever 43 to the operating state (O), as shown in FIG. 7 .

By the operation of the chain drive device (not shown), the drive chain (4) moves along the upper guide rail (1), and the chain dog (6) of the drive chain (4) is connected to the hook (12) of the front carrier (10). is moved along with the movement of the drive chain 4 in a fixed state, and when it reaches the stop position P as shown in FIG. 6, the hook 12 is moved to the caught position ( It rotates from O2) to the unlocking position (O1) and is unlocked with the chain dog (6).

Accordingly, the chain dog 6 continues to move in the forward direction along the moving chain 5 and passes the stop position, but the front carrier 10 is stopped by the carrier stop mechanism 40 at the stop position P. do.

That is, as shown in FIG. 5, the stopper pin 17 provided on the hook 12 turned to the unlocking position O1 is caught by the locking portion 42 of the stop lever 43 and stops. The hook to which the stopper pin 17 is coupled and the front carrier 10 to which the hook is coupled are stopped.

At this time, the impact generated when the stopper pin 17 of the hook 12 catches and collides with the catching portion 42 of the stop lever 43 is transmitted to the slide block 54 through the stop lever 43, The shock transmitted through the slide block 54 is absorbed and cushioned by the shock absorber 56.

H: Raised position L: Lowered position
N: Non-operating state O: Operating state
O1: Jam release position O2: Jam release position
P: Stop position 1: Upper guide rail
2: Lower guide rail 3: Support frame
4: Drive chain 5: Chain
6: Chain dog 7: Chain trolley
8: Support roller 8a: Left and right guide rollers
9: Cam attachment 10: Front carrier
11: body 12: hook
12a: Locking jaw 13: First pivot pin
14: second pivot pin 15: operating lever
16: Link 17: Stopper pin
20-1: Front connecting rod 20-2: Middle connecting rod
20-3: Rear connecting rod 20F: Center front carrier
20R: Center rear carrier 30: Rear carrier
40: Carrier stopping mechanism 41: Bracket
42: Hook 43: Stop lever
44: Stop cylinder 45: Link bar
50: Shock absorbing mechanism 51: Front fixing plate
52: rear fixing plate 53: guide rod
54: Slide block 55: Spring
56: shock absorber 61: cylinder
63: support rod 64: adjustment screw
100: carrier device

Claims (8)

An upper guide rail (1) installed along a certain movement path in the upper space of the workshop;
a lower guide rail (2) installed in parallel along the same path as the upper guide rail (1) at intervals below 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 plurality of chain trolleys (7) guided on the upper guide rail (1), a chain (5) connecting the chain trolleys (7) and moving along the upper guide rail (1) by a chain driving means, a drive chain (4) with chain dogs (6) connected between two adjacent chain trolleys (7); and
It includes a front carrier (10) with at least one support roller (8) rolling along the lower guide rail (2), the front carrier (10) comprising a body (11) and the drive chain (4). ) and a hook (12) installed on the body (11) so as to be rotatable between a locking position (O2) engaged with the chain dog (6) and a locking release position (O1) that is released from the chain dog (6). , the stopper pin 17 provided on the hook 12, and the hook 12 in the hanging position ( An overhead type including a carrier device (100) including an operating lever (15) that switches from O2) to the unlocking position (O1) and returns the hook (12) to the locking position (O2) in the carrier non-stop position. In the trolley conveyor device,
One end of the guide rail (1, 2) is pivotally coupled to the guide rail (1, 2) through a bracket to provide a space between a stopper pin engaging position on the stopper pin (17) and a stopper pin disengaging position that is released from the stopper pin (17). A carrier stop mechanism (40) that pivots and has a stop lever (43) at the front end having a locking portion (42) for fixing the stopper pin (17);
The front carrier 10 of the carrier device 100 reaches the stop position P and the stopper pin 17 is caught by the locking portion 42 of the stop lever 43, so that the front carrier 10 is stopped. An overhead carrier with a shock absorber, characterized in that it further comprises a shock absorber (50) that absorbs and cushions the shock transmitted to the front carrier (10) through the stopper pin (17). type trolley conveyor device. According to paragraph 1,
The shock absorption mechanism 50 is,
A front fixing plate 51 fixed to the support frame 3, a rear fixing plate 52 fixed to the guide rails 1 and 2 at a constant interval behind the front fixing plate 51, and the front fixing plate At least one guide rod 53 is provided in the longitudinal direction of the guide rail between (51) and the rear fixing plate 52, is provided to slide along the guide rod 53, and the stop lever 43 It is installed between the slide block 54 connecting the rear end of the slide block 54 and the front fixing plate 51, and when the front carrier 10 stops, the slide is moved through the stop lever 43. An overhead carrier-type trolley conveyor device with a shock absorbing mechanism, characterized in that it includes a shock absorber (56) that cushions the shock transmitted to the block (54). According to paragraph 2,
The shock absorber 56 includes a cylinder 61 fixed to the front fixing plate 51, one end of which is supported on the slide block 54, and extends to be slidably movable inside the cylinder 61, so that it extends to the inside of the cylinder. A spring installed on the outer periphery of the support bar 63 between the support bar 63 supported by a support means and the slide block 54 and the front fixing plate 51 to return the support bar 63 to its initial extended state. (55) An overhead carrier type trolley conveyor device with a shock absorbing mechanism, comprising: According to paragraph 2,
An overhead carrier type trolley conveyor device with a shock absorbing mechanism, further comprising an adjustment screw (64) for adjusting the gap between the front fixing plate (51) and the slide block (54). According to paragraph 1,
The carrier device 100 includes a central front carrier 20F connected to the rear of the front carrier 10 by a front connecting rod 20-1, and an intermediate connecting rod to the rear of the central front carrier 20F ( 20-2) An overhead trolley conveyor device with a shock absorbing mechanism, characterized in that it includes a central rear carrier (20R) connected. According to paragraph 1,
Shock absorption, characterized in that the operating lever (15) pivots between a raised position that moves the hook (12) to the locking position (O2) and a lowered position that returns the hook (12) to the unlocking position (O1). Overhead trolley conveyor device equipped with mechanism. According to clause 6,
The operating lever 15 pivots to the raised position when engaged with the cam attachment 9 provided at the rear end of the preceding carrier device, and returns to the lowered position by its own weight when separated from the cam attachment 9. An overhead trolley conveyor device equipped with a shock absorbing mechanism characterized in that it rotates. According to paragraph 1,
The support rollers 8 provided on the front carrier 10 are composed of two support rollers 8 installed at intervals along the moving direction of the front carrier on the body 11 of the front carrier 10, each of which An overhead trolley conveyor with a shock absorbing mechanism, characterized in that left and right guide rollers (8a) are installed on the lower side of the support roller (8) to guide the front carrier (10) in the longitudinal direction of the lower guide rail (2). Device.