JPS60174818A - Conveyor - Google Patents

Abstract

PURPOSE:To enable taking-in of a material to be treated from one direction and carrying out in the opposite direction with a smaller-sized device by providing let-off dogs and a conveying bar to a chain conveyor and engaging and disengaging the conveying bar and a conveying lever. CONSTITUTION:Sprockets 34, 35 are respectively fitted to a driven shaft 32 and a driving shaft 33 of a conveyor in heat treatment, etc. and plural lengths of conveyor chains 36 are put on and provided thereto. Let-off dogs 38 are projected to the required positions of the chains 36. A conveying lever 41 is fitted to the shaft 33 side and a hook part 42 is provided to the bottom surface of the front end thereof and is engaged with a conveying lever 37 provided between the chains 36. A ratchet 44 is preliminarily provided to the rear end of the lever 41. A material 12 to be treated is placed on the chain 36 by moving the lever 41 and the lever 37 is disengaged from the hook part 42 of the lever 41 to move the material 12 to the center of the furnace. The dog 38 is pressed to the material 12 to let off the material 12 to the outside of the furnace.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a conveying device that takes in and sends out processed products, such as a conveying device that takes in processed products from outside the furnace of various types of furnaces, and
〇 [Prior art] Concerning a conveyance device that sends the product out of the furnace after heat treatment When heating a processed product such as steel material, multiple processing steps such as preheating, heating, carburizing, nitriding, and quenching are required.

In order to improve the efficiency of the heat treatment process, it is desirable to connect furnaces that carry out different treatments and perform the heat treatment in a continuous flow, but conventionally each process was performed in separate furnaces. There are many cases.

FIG. 1 shows a conventional conveyance device installed in a quenching furnace for performing the above-mentioned individual heat treatment, and will be briefly described below.

Quenching oil (2) is stored in the lower part of the furnace body (1), and the furnace body (
A vertical lifting rail (3) is provided across the lower and upper portions of 1). An L-shaped lifting frame (4) is attached to the lifting rail (3) via rollers (5), and the lifting frame (4) can be moved up and down by a lifting cylinder (6). Further, the elevating frame (4) is provided with a fork rail (7) extending in the horizontal direction, and the fork rail (7) is provided with a fork (8) that extends and contracts in two stages. The fork (8) is engaged with an arm (11) that is swung by a cylinder (9) for fork operation, and the fork (11) is engaged with the fork (8) by the swing of the arm (101).
8) is designed to expand and contract.

When carrying out hardening treatment using the above-mentioned conveyance device, the inlet aυ of the hardening furnace is opened, the lifting frame (4) is raised by the cylinder (6), the arm α0) is swung, and the fork (
8) to pass through the inlet (11) and extend out of the furnace. The processed product α2 is placed at the position where the fork (8) extends, and the tip of the fork (8) is slightly lifted and the processed product (1
After performing the ground cutting in step 2), the 7 cylinder (9) is activated to shorten the fork (8) via the arm uO), and the processed product a is taken into the furnace. Next, the elevating frame (4) is lowered to immerse the processed product α2) in the quenching oil (2) for a required period of time.

When carrying out the processed product (12) out of the furnace, the above operation may be reversed.

In the above-mentioned conventional conveying device, the fork (8) is supported in a cantilevered manner, so a supporting part is required below the loading part of the processed product (one part), and this supporting part becomes a dead space. The furnace is large compared to the size of the product.Since a swinging arm (10) is provided in the furnace, it becomes an obstacle to gas circulation when the required gas atmosphere is created.Also, the arm αO
) passes through the furnace body (11), and the components of the device for lifting the tip of the fork (8), which are not shown, pass through the furnace body (1), so the sole location Furthermore, since the above-mentioned transfer device can only move the processed product a2 in and out in one direction, when the quenching furnace is installed online, it is difficult to create a vacuum state. Separate equipment must be provided for charging or discharging into the furnace.

[Purpose of the invention]

The unexploded EJ has a simple structure, is small, and has no dead space.
It is an object of the present invention to provide a conveyance device that takes in processed products from one direction and sends them out in the opposite direction, thereby solving the problems of the prior art described above.

[Structure of the invention]

The present invention comprises a chain conveyor provided with a delivery dog and a conveyance bar, and a conveyance lever that can hold the conveyance bar at one end and a conveyed object at the other end, and the conveyance bar and the conveyance lever are engaged with each other. The conveyed object can be pulled in by the conveyor, then transferred by the movement of the chain conveyor, and then sent out by the delivery dog.

〔Example〕

The present invention will be described in detail below with reference to the drawings.

Fig. 2 is a layout diagram of an industrial furnace in which a front chamber 05) and a heating chamber u[il, quenching wan] are connected.
7) shows an example in which the conveying device 0□□□ according to the present invention is implemented.

To explain the general heat treatment process in Figure 2, the processed product (12 is an insertion door (2) placed on the outside table α9)
0) is opened and loaded into the front chamber 05), and the insertion door (20) is inserted into the front chamber 05).
After closing, preheating or vacuum heating vaporization cleaning is performed in the front chamber (I5). When the required processing is performed in the front chamber (15), the partition door +21) is opened and the transfer is transferred to the heating chamber (IG), and when the compartment door (21) closes the compartment (151 (16)), the heating chamber αG ) is filled with heat treatment gas and liquid to create the required atmosphere for carburizing, nitriding, etc. Further, the intermediate door (2) is opened, the processed product (121) is taken in by a conveyor provided on the quenching chamber side, and the intermediate door (22) is closed.

Activate the conveying device 0 mallet to transfer the processed product Q2+ to quenching oil (2
) for quenching treatment. The finished product a2, which has been quenched, is pulled up, the extraction door 03) is opened, and the conveyor device α~ sends it to the outside table α.

Newly processed products are sequentially transferred to the front chamber (
15), the processed products can be continuously heat treated.

Next, the conveying device 0 barrel described above in FIGS. 6 to 5 will be described in detail.

A pair of lifting rails (2 (a) (2)
4) are provided facing each other, and the lifting rails (241 (24)
The T-shaped elevating frame (26) can be freely raised and lowered via the rollers (25). The elevating frame (26) is appropriately reinforced by diagonal members (27), upper beams (281, etc.), and the upper beam (28) is equipped with an elevating cylinder (30 ) Connect the lower end of the rod Gυ of the elevating frame t2[il with the driven shaft (32) at the front (extraction door cl!31 side) and the drive shaft (33) at the rear (intermediate door (221 side)), respectively. It is rotatably installed, and the driven jaw (32 and drive jaw 7) (33
), a pair of driven sprockets 34J1 and 0 driven sprocket (35) are fitted onto each drive sprocket (C34) and a conveyor chain 06) is endlessly wound around the drive sprocket Oω, and left and right conveyor chains □□□13
A conveyor bar 07) is attached by extending over the conveyor chain (36) (g), and a delivery dog link is provided protruding from the required position of the conveyor chain (36) (g) (see Fig. 6).

A pair of flanged guide rollers C39) are fitted onto the drive shaft (33), and a support rod (401) is added in front of the guide rollers 09.The grooves of the guide rollers 09 are opened toward the rear. A U-shaped conveyance lever (41) is fitted therein, and the conveyance bar 07) can be fitted into and removed from a hook portion (42) provided on the lower surface of the front end of the conveyance lever (41).

Further, the conveyance lever (4υ) has a length to be placed on the driven shaft L-(32) and the support rod (40) when the conveyance bar (37) is detached, and is a portion that comes into contact with the driven seventh shaft C32. (A recessed portion (4) is formed so that it is stably supported on 321. Furthermore, the lower surface of the rear end of the conveyance lever (4I) is chamfered so that it can easily ride on the guide roller (39). In addition, as shown in Fig. 9, a ratchet (four ratchets) is provided at the rear end.

The pivot point and center of gravity of the ratchet l-(441) are eccentric, and one end always protrudes from the top surface of the transport lever (4υ), and the ratchet rotates freely clockwise, but not counterclockwise. It has a structure that does not rotate in any direction.

One end of the drive shaft (33) is connected to the lifting frame (26).
) is extended to the side, and a sprocket is attached to the extending end of the sprocket).
(45) (see Figure 4) 0 or hardening chamber 07)
An axle box (47) is provided on the side wall (46) on the extended end side, and a rotating shaft (48) is rotatably and airtightly attached to the axle box (4η). , the sprocket 19+601 is fixed to the indoor end, and the sprocket 09 at the outdoor end and the sprocket (5υ) provided on the motor reducer 52 are connected by a chain .

A first arm 64) is provided at the extending end of the drive shaft C331.
One end 1 of the second arm 65) is pivotally connected to the indoor end of the rotary shaft (48), and one end of the second arm 65) is pivotally connected to the indoor end of the rotating shaft (48).
5) are rotatably connected by an idler shaft (63).

The shaft end of the rotating shaft (48) inside the quenching chamber and the idler shaft (6
3) Sprockets on both ends of each) (56) (57)
(Insert 5al, sprocket (56) and (57)
and 15) and mark 6 are connected with chains 69) and (60).

Note that (62) in the figure is a support hardware for supporting the conveyance lever (41).

Next, the operation of the above device will be explained with reference to FIGS. 5 to 8.

The transport bar C37) and the hook part (42) are on standby in an engaged state. When pulling out the processed product from the heating chamber θ6), a motor (not shown) moves the sprocket (51), chain (53), sprocket (49), and sprocket (
! 5[il, chain (59), sprocket 6η, driven via sprocket chain (60)]
Drive sprocket (33)) (Rotate 351 counterclockwise, move the transport lever (4I) to the left in the figure, and move the rear end of the transport lever (41) Ω to the heating chamber α6) side from the furnace wall. Make it stand out.

In the above state, the front end of the processed product (12) overlaps the rear end of the transport lever (4υ). During this process, the upper end of the ratchet (4υ) sinks and returns to its original position in the depression at the bottom of the processed product (12). Then, the rear end of the transport lever (4υ) and the processed product (1) engage.

Next, rotate the drive sprocket 0■ clockwise and move the transport lever (4υ) to the right in the figure.

The processed product is pulled until the front end is placed on the conveyor chain (36), and the conveyor bar G force and the conveyor lever (4υ hook part (42)) are separated.The conveyor lever (4I) and the conveyor bar (When the force 3 is removed, the concave part of the lever (4I) (
4 and the driven shirt 1-C, 32 match, and the rear end of the lever rests on the support hardware (62) and is supported below the conveying surface as shown in FIG. Upon further rotation, the processed product α is moved to the center of the furnace by the movement of the conveyor chain 0o. 'When the processed product (12) is at the center of the furnace, stop the drive sprocket (3).

The rod Sυ associated with the lifting cylinder is projected, the lifting frame (26) is lowered, and the processed product 02 is immersed in the quenching oil (2). When the elevating frame 06) descends, the first arm (5
41 and the second arm (55) change, the connection state between the rotating shaft (=18+ and the drive/yaft (33)) is maintained, and the sprockets (561, (57), 05
8) and (45) due to the arm bending movements cancel each other out, and do not cause the drive 7 yaf 1- (331) to rotate (FIG. 7).

Pull in the Rondo (3υ), raise the lifting frame (2G), and lift the processed product (12) to the transport level. 0. Open the extraction door (23+, drive sprocket 1). Further rotate the 1351 clockwise. As described above. The conveyor chain (A) is equipped with a delivery dog (2), which handles the processed products (2).
The container is placed on the conveyor chain (36) so that it is located immediately after the processed product (121).

Due to the rotation of the sprocket (35) in the time direction, the processed product (12) moves to the right via the conveyor chain 06), and eventually the first half of the processed product (06) moves to the right side via the conveyor chain 06).
6) When the conveyor chain (3G) loses its transfer ability, the delivery dog 08) comes into contact with the rear end surface of the processed product (12) and sends the processed product 02) onto the outside table (19). Figure 8). Once most of the processed product (17J) has been transferred to the outside table a2, it is completely taken out of the furnace using the necessary means.

When the feeding of the processed product (!) is completed, the drive sprocket C3
5) Reverse. Due to the reversal of the sprocket (3ω, the conveyor chain ('! A moves in the opposite direction to the aforementioned direction, and the conveyor bar 67) and the hook (4) engage the conveyor chain (as the sword moves further) , it enters a standby state as described above.

Thus, the conveyance operation of taking in the processed product (12) from one inlet and sending it out from the other outlet is completed.

As is clear from the above explanation of the structure and function of this device, the structure is simple and compact, and there is almost no dead space (especially in the horizontal direction).

In the second embodiment, the present invention is implemented in a quenching furnace (1) and an elevating device is included, but it goes without saying that the present invention may be provided for simply transferring in the horizontal direction.

Further, the chain conveyor may have 6 or 4 rows.

〔Effect of the invention〕

As described above, according to the present invention, the following excellent effects can be achieved. (1) For transportation only in the horizontal direction, only one driving source is required, and the structure is simple and compact.

(II) All movable parts are housed in the furnace, and the only place that passes through the furnace body is the drive shaft, making it easy to seal.

(iii) The device can be miniaturized and dead space can be almost eliminated. (1v) Since the conveyance direction is a unidirectional flow, it can be installed online.

(■) Since the number of component parts is small and simple, manufacturing costs are low and reliability and maintainability are improved.

[Brief explanation of drawings]

Fig. 1 is an elevational view of a conventional conveying device, Fig. 2 is a layout diagram of an industrial furnace in which the present invention is implemented, Fig. 6 is a side view of an embodiment of the present invention, and Fig. 4 is a front view of the same. , FIGS. 5 to 8 are diagrams illustrating the operation of this embodiment. FIG. 9 is an explanatory diagram of the rear end of the transport lever. 0Q~ is the transport device, <321 is the driven shaft, (33
) is the drive shaft, (1341 is the driven sprocket, (
35) is a drive sprocket, OG) is a conveyor chain, C force is a conveyance bar, (38) is a delivery dog, (39) is a guide roller, (41) is a conveyance lever, (42 is a hook part,
(4 forces indicate ratchet 0 Patent applicant: Ishikawajima-Harima Heavy Industries Co., Ltd. Patent applicant: Iwakuni Manufacturing Co., Ltd. Figure 1 q Figure 3

Claims (1)

[Claims] 1) Arrange the drive shaft and driven/yaft in parallel, attach multiple sprockets to both shafts, and install a double conveyor chain around the tin rocket, and place a delivery dog at the desired position of the conveyor chain. A conveyor bar is provided between the two conveyor chains, a guide and a roller are fixed to one of the conveyor chains, and the conveyor chain is placed on and guided by the guide roller, and one end engages and disengages from the conveyor bar. 1. A conveyance device comprising a conveyance lever formed with a removable hook portion and provided with a ratchet at the other end capable of engaging an object to be conveyed.