JPS6077099A - Wrapping gearing - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding transmission device, and particularly relates to a winding transmission device in which the linear motion of a cylinder or the like is transmitted at double speed using a shoulder wheel.

Generally, when heat-treating metal products by quenching, it is necessary to rapidly cool the product after it has been heated to a high temperature, and there is a requirement that the product must be promptly removed from the heat treatment furnace and immersed in a cooling liquid bath. be.

Under the most severe conditions, it may be necessary to open the heat treatment furnace door, remove the product, drop it into the cooling liquid bath, and completely submerge the product within five seconds.

However, in conventional heat treatment equipment, each of the above-mentioned steps is performed by a hydraulic cylinder, and its stroke is directly utilized. Therefore, the hydraulic cylinder becomes larger and the entire device inevitably becomes larger. It had the disadvantage that it could not cope with extremely rapid cooling such as.

Therefore, when the present invention is applied to, for example, a mechanism for discharging products in a heat treatment furnace in such a heat treatment apparatus, it is possible to carry out products in the same manner as compared to the case where the product is discharged by directly using one stroke of a hydraulic cylinder as described above. Double the conveyance distance can be obtained with stroke length, and it takes 1/2 of the conventional distance to convey the same distance.
The stroke length is sufficient, and the hydraulic cylinder used in the unloading mechanism can be downsized, and at the same time, the unloading speed can be doubled with the same stroke speed. The hook is intended to provide a transmission device.

To achieve this objective, the present invention provides at least two fixed pulleys arranged at a required distance from each other, connected together in close proximity to each other, and connected to a suitable linear reciprocating drive mechanism such as a cylinder. It consists of two movable pulleys that are driven reciprocatingly in a direction perpendicular to the support shaft, and an intermediary joint such as a tuning belt, a tuning rope, or a chain is passed between the fixed pulleys, and both ends of the intermediary joint are connected to each other. The fixed pulley is fixed at a predetermined position while being wound around each of the movable pulleys, and is adapted to transmit and utilize the rotation of the fixed pulley obtained by operating the linear reciprocating drive mechanism to drive the movable pulley. It is characterized by:

Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 is a diagram showing the basic structure and operation of a winding transmission device M according to the present invention.

In this example, two fixed pulleys T1 and T2 are arranged with their support shafts 1, 1 parallel to each other and separated by a required distance, and two movable pulleys D1 and D2 are arranged with their support shafts 2.2 in parallel. They are attached to the connecting member 3 in parallel and are integrally connected in close proximity to each other.

The movable pulleys Di and D2 are connected to a linear reciprocating drive mechanism such as a cylinder S via a connecting member 3, and are arranged to be capable of linear reciprocating drive in parallel to a line connecting the fixed pulleys T1 and 12. has been done.

Further, an intermediary joint 4 such as a tie belt, an m-cord or a chain is passed between the fixed pulleys TI and 72, and both ends of the intermediary joint 4 are wound around the movable pulleys DI and D2 at a predetermined position. Fixed in position.

Then, the cylinder S is operated, and its piston rod 5
Extend by half of the total length, that is, by 1/2 stroke,
If the movable pulleys DI and D2 are moved by a distance l to the right from the left end position indicated by the broken line in FIG.
Since it is involved, the point PO on the intermediate node 4, which is passed between the fixed pulleys Tl and 12, moves a distance of 27 to the left! It is moved and reaches point Pl.

That is, the fixed pulleys TI and T2 are rotated so that the intermediate node 4, which is hooked thereon, is moved a distance twice the stroke length of the cylinder S and at a speed twice the stroke speed.

Therefore, for example, an endless chain 6 is hung in parallel between the fixed pulley T2 and a fixed pulley T3 provided separately, and the cylinder S
When the movable pulleys DI and D2 are moved a distance 21 from the left end position to the right end position shown by the broken line by driving the piston rod 5, the rotation of the fixed pulley T2 obtained by the movement of the movable pulleys is caused by the rotation of the endless chain 6. is transmitted to the fixed pulley T
The endless chain 6 uses 2 as the original car and the fixed pulley T3 as a slave.
The upper point QO moves at a speed twice as fast as the moving speed of the movable pulleys Di and D2 and a distance 41 times the distance, and reaches the position of the point Q1. Here, if an object (not shown) is attached to the point QO position of the endless chain 6, the object will have a stroke length of cylinder S of 27! The cylinder S is reciprocated in the direction of arrow F between points QO and 01, which correspond to a distance twice that of , at twice the stroke speed of the cylinder S.

As described above, according to the present invention, the linear motion of a movable pulley that is connected to a linear reciprocating drive mechanism such as a cylinder and driven back and forth is converted into the rotational force of a fixed pulley, and the fixed pulley is used as a base wheel to rotate the movable pulley. By using the transmission, it is possible to drive an object at twice the driving speed of the movable pulley and over a distance twice the driving distance.

Hereinafter, the winding according to the present invention will be explained in detail with reference to FIGS. 2 to 4, with reference to the case where the transmission device M is applied to the heat treatment apparatus as described above.

FIG. 2 is a front view of the heat treatment apparatus, and FIGS. 3 and 4 are partial side views thereof.

Here, FIG. 2 shows an example in which the winding transmission device M according to the present invention is applied to a door opening/closing mechanism of a heat treatment furnace.
A heat treatment furnace 11 is formed on the upper stage side, the front side of which is open as a loading/unloading exit, and a heat-insulating wall surrounds the vise, and opening/closing doors 12 and 13 for opening and closing the loading/unloading exit are formed on the front side of the heat treating furnace 11. is installed.

Opening/closing 812 and 13 are door hanging rollers 1 that roll within the door opening/closing rail 14 disposed on the upper front side of the heat treatment furnace 11.
5 via a door support member 16, and horizontal rails 17 and 18 disposed above and below the opening/closing door 12.13, respectively. A roller 20 is engaged and slidably guided in the left and right direction.

Next, to explain the door opening/closing mechanism for opening and closing this opening/closing door 12.13, chain sprockets T1, T2 as fixed pulleys are supported by brackets 21.21 at one end of the door opening/closing rails 17 and 18, respectively. The shaft 1.1 is arranged in parallel, and the chain sprocket T
A hydraulic cylinder S1 that extends and contracts the piston rod 5 along a line connecting T2 and T2 is fixed to the side wall of the heat treatment apparatus 1o. A bracket 22 is fixed to the tip of the piston rod 5 of the hydraulic cylinder s1, and the chain sprockets DI and D2 as movable pulleys are brought close to each other via the bracket 22, and are integrated with their support shafts 2, 2 in parallel. is connected to. First, the chain 4 as an intermediary joint is passed between the chain sprockets T1 and T'2, and then both ends of the chain 4 are wrapped around the chain sprockets DI and D2, respectively, and then the 21, 21 are each fixed at their ends, thereby forming a winding gear M according to the invention.

Further, at the other ends of the door opening/closing rails 17 and 18, chain sprockets T4 and T5 are disposed via brackets 23, respectively, with their spindles parallel to each other.

And chain sprockets T1 and T2 as the original vehicle
A door traction chain 24 is wound around each of the chain sprockets T4 and T5, and both ends of each door traction chain 24 are connected to the opening/closing doors 12 and 13 via the door support member 16 or 19, respectively. Thus, when the chain sprockets TI and T2 are rotated counterclockwise, each door traction chain 24 is pulled in a direction that opens the doors 12 and 13.

The above is the structure of the door opening/closing mechanism of the heat treatment furnace shown in FIG. 2, and its operation will be explained next.

When the product 11 is housed in the heat treatment furnace 11 and subjected to heat treatment, the opening/closing door 12.13 is naturally closed, and in this state the piston rod 5 of the hydraulic cylinder s1 is contracted.

When the heating of the product H is completed, the hydraulic cylinder S1 is immediately operated to extend the piston rod 5, and the chain sprocket DI as a movable pulley is integrally connected to the tip of the piston rod 5 via a bracket 22.
D2 is driven linearly in the direction of arrow F1. As a result, as explained in FIG. 1, the winding according to the present invention is performed by the transmission device M operating and the chain sprocket T serving as the original vehicle.
■ and T2 are rapidly rotated counterclockwise, and as a result, the door traction chain 24, which is wrapped around the 8-chain sprocket TI and T2, pulls the opening/closing door I3 in the opening direction. The door pulling chain 24 wrapped around the chain sprocket T4.75 serving as a follower pulls the opening/closing door 12 in the opening direction, and the loading/unloading port of the heat treatment furnace 11 is quickly opened.

In addition, when closing the opening/closing door 12.13, this can be done by retracting the piston rod 5 of the hydraulic cylinder S1 from the extended state, contrary to the above.

As described above, the opening/closing door 12, 13 can be moved by a distance corresponding to twice the stroke length of the hydraulic cylinder S1 by the transmission device M. A relatively small hydraulic cylinder with a stroke of 1/2 of the hydraulic cylinder used for opening and closing is sufficient, and therefore there is an advantage that the entire heat treatment apparatus can be downsized. Furthermore, as mentioned above, the fact that the door 12.13 is moved by a distance equivalent to twice the stroke length of the hydraulic cylinder S1 means that the opening/closing door 12.13 is opened and closed at twice the stroke speed of the hydraulic cylinder S1. Compared to the conventional door opening/closing mechanism that directly uses the stroke of a hydraulic cylinder, the opening/closing operation can be performed at twice the speed, thus making it possible to carry out the product H extremely quickly.

Next, FIGS. 3 and 4 show a winding and transmission device M according to the present invention, a product transport mechanism for transporting products into and out of the heat treatment furnace, and a product transport mechanism for transporting products out of the furnace by the product transport mechanism, respectively. This is an example of a product dropping mechanism for dropping the product into a cooling liquid tank and quickly immersing it in the cooling liquid for quenching.

In FIG. 3, a cooling liquid tank 25 containing a cooling liquid for rapidly cooling the heated product H is connected to the front side of the heat treatment furnace 11, and the cooling liquid tank 25 and the heat treatment furnace 11 include: Roller conveyors 26 and 27 are arranged so as to be connected to each other and extend from the front side of the cooling liquid tank 25 into the heat treatment furnace 1.

On the roller conveyors 26.27, a product stand 28 for loading the product H and carrying it in and out of the heat treatment furnace 11 is disposed in a freely rolling manner, and the product stand 28 is pulled by the roller conveyor 26.27. A towing vehicle 29 is disposed to travel and move along the conveyance direction of 27. The towing vehicle 29 has wheels (not shown) on both sides thereof, and is driven to run on rails (not shown) laid along both edges of the upper surface of the coolant tank 25 . Further, the towing vehicle 29 is provided with a rotatable hook arm 31 which extends horizontally and whose extension end is vertically bent downward and has a hook 30. It is loosely fitted into a connecting hole 32 bored in the center of the front end of the product stand 28 .

Here, a detailed explanation of the structure of the transmission device M according to the present invention will be omitted, but in this example, the chain sprocket T1 is fixed to the upper front side outside the side wall of the coolant tank 25, and the chain sprocket T1 A chain sprocket T6, which is driven by a chain 33 running parallel to the chain sprocket T6, is fixed to the upper part of the heat treatment furnace 11 side of the coolant tN25.

Furthermore, on the outside of the side wall on the opposite side of the coolant tank 25, chain sprockets T1'' and T6 are fixed coaxially with the spindles of the chain sprockets T1 and T6 and driven.
A chain 33 is placed in parallel between these chain sprockets T1° and T6'. That is, a transmission mechanism consisting of two chain sprockets and a chain suspended in parallel between them is connected to the coolant tank 25.
A pair are arranged in parallel on both sides.

When the piston rod 5 of the hydraulic cylinder S2 disposed on the outer wall of the cooling liquid tank 25 is contracted, the chain 33 (33°) is attached at both ends to the towing vehicle 2 at a position on the front side of the cooling liquid tank 25. is fixed to.

Note that 34 in the figure is a tensioner that tensions the chain 33 (33').

Therefore, when carrying the product H into the heat treatment furnace 11,
Hydraulic cylinder S2 is driven to extend its piston rod 5, thereby chain sprocket TI (T
I”) clockwise, and the chain 33 (33°
) is driven in the direction of arrow F2, and the product platform 28 connected to the tractor 29 and loaded with the product H is carried into the heat treatment furnace 11 as shown by the chain line in FIG. 3. . This operation according to the present invention is carried out by the transmission device M, so that the towing vehicle 29 can travel a distance above the roller conveyor 26 from one end side to the other end. The cylinder S2 may be a cylinder with a stroke length corresponding to 1/2 of the traveling distance. When the loading is completed, the driving of the hydraulic cylinder S2 is stopped in the state shown by the broken line in the figure, and at the same time, the door opening/closing mechanism shown in FIG. 2 is operated to close the opening/closing door 12.13.

At this time, since an insertion hole 35 for inserting the hooking arm 31 of the towing vehicle 29 is formed in the abutting portion of the opening/closing door 12.13, the hooking arm 31 of the towing vehicle 29 is inserted into the heat treatment furnace 11. The opening/closing doors 12 and 13 can be closed while they are loosely fitted into the connection hole 32 of the carried-in product stand 28.

In this state, the prescribed heating is completed and the product H is transferred to the heat treatment furnace 11.
When the vehicle is to be taken out to the general public, the door opening/closing mechanism shown in Fig. 2 is activated to quickly open the opening/closing door 12, 13,
The winding shown in FIG. 3 drives the hydraulic cylinder S2 of the transmission device M to retract the piston rod 5 from the extended state shown by the broken line in the figure, and the chain sprocket TI ("rl') counterclockwise to rapidly move the towing vehicle 29 fixed to the chain 33 (33'') in the direction of arrow F3 opposite to the above. As a result, the product platform 28 connected to the tractor 29 and loaded with the products 11 is transported out of the heat treatment furnace 11 at twice the contraction speed of the hydraulic cylinder S2. Product H transported out of the heat treatment furnace 11 in this way
Next, the product is dropped into the cooling liquid tank 25 by the product dropping mechanism shown in FIG. 4 and is rapidly cooled.

That is, the product 1 is heated and is carried out from the heat treatment furnace 11 as described above and drawn onto the roller conveyor 26.
The roller conveyor 26 is placed on the product table 28.
It is also designed to be dropped into the cooling liquid tank 25 and hardened.

In FIG. 4, the winding transmission device M according to the present invention has its chain sprocket throat Tl fixed to the upper front side outside the side wall of the coolant tank 25, and the hydraulic cylinder S3 is arranged on the outer wall of the coolant tank 25. A chain sprocket TI'' which is supported by a support stand 36 provided and disposed horizontally, is coaxially fixed to and driven by the chain sprocket T1, and is located above the liquid level in the coolant tank 25, and the chain sprocket TI'' below it. A chain 37 is hung in parallel between the chain sprocket T7 fixed to the bottom of the front side of the coolant tank 25, and
Similarly, a chain 38 is hung between chain sprocket T1'' and chain sprocket throats T8 and T9, which are respectively fixed at the top and bottom of the heat treatment furnace II side in the cooling liquid tank 25 to the right of the chain sprocket T1''. .

Both ends of a chain 37 are fixed to the starting end of the roller conveyor 26 on the exit side of the chain 37 when the chain sprocket Tl'' rotates clockwise, and a chain sprocket T8 and a chain sprocket T8 are fixed to the terminal end of the roller conveyor 26. Both ends of the chain 38 are fixed between the chains 37 and 38, and the roller conveyor 26 is horizontally supported by the chains 37 and 38.
It can be moved up and down by the operation of.

In addition, four chain sprockets TI", T7, T8
A pair of such transmission mechanisms, each consisting of a chain 37 and a chain 37 and 38, are disposed inside the cooling liquid tank 25 along both sides of the tank.

Therefore, during thunderstorms, the winding is carried out by the hydraulic cylinder S3 of the transmission device M.
In the contracted state, the roller conveyor 26 is supported at a position connected to the roller conveyor 27 in the heat treatment furnace 11, as shown in FIG.

Then, when the heated product H is carried out of the furnace by the product conveyance mechanism shown in FIG. 3 and pulled out onto the roller conhair 26 together with the product table 28, at the same time, the winding device shown in FIG. It is activated to drive the hydraulic cylinder S3 and extend its piston rod 5. As a result, the chain sprocket T1 of the transmission device M is rapidly rotated clockwise, and at the same time, the chain sprocket T1 and the chain, which form a pair of transmission mechanisms disposed in the tank, are rotated rapidly. Chain sprocket T7.'T8 and T9, on which 37 and 38 are engaged, are similarly rapidly rotated clockwise, thus causing chain 37
and a roller conveyor 2 fixed to 38 and supported horizontally.
6 is forcibly lowered into the cooling liquid with the product H and the product stand 28 placed thereon.

At this time, the product stand 28 has a towing vehicle 29 in its connecting hole 32.
Since the hook 30 of the hook arm 31 is loosely fitted and connected to the towing vehicle 29, the roller conveyor 26
When the vehicle descends with the vehicle, it is easily separated from the towing vehicle 29.

In addition, after completing the prescribed cooling, the winding is again operated by the transmission device M, and the piston rod 5 of the hydraulic cylinder S3 is
contract, and the roller conveyor 26 becomes the roller conveyor 27.
Return to the original position where it is connected on the same plane as the

As described above, according to this product dropping mechanism, the product I (completed in heating and carried out from the heat treatment furnace 11) is cooled by the roller conveyor 26 at twice the stroke speed of the hydraulic cylinder S3 by the wrapper transmission device M. Since the product H is dropped into the liquid tank 25, it can be submerged in the cooling liquid much more quickly than in the case where the product H is allowed to sink naturally, and rapid quenching can be performed.

As described above, the winding according to the present invention can be achieved by applying the transmission device M to the door opening/closing mechanism, product transport mechanism, and product dropping mechanism of the heat treatment apparatus 10 (not shown in FIGS. 2 to 4), respectively.
Each operation of opening the opening/closing door 12.13, taking product 1 out of the heat treatment furnace 11, and dropping product H into the cooling liquid tank 25 can be performed in an extremely short time. It becomes possible to fully cope with heat treatment under the most severe conditions.

Further, the hydraulic cylinders 31 to s3 used may be of a stroke of 1/2 of the hydraulic cylinders used in conventional devices, so that the entire device can be downsized.

As described above, according to the present invention, the rotation of the fixed pulley obtained by operating the linear reciprocating drive mechanism such as a cylinder to drive the movable pulley is used for transmission. If a pulley is used as a new drive source, it is possible to obtain a moving distance twice as much as the moving distance of the movable pulley by the reciprocating drive mechanism, and at the same time, it is possible to obtain a moving speed twice the moving speed of the movable pulley. Therefore, it is extremely useful when applied to the above-mentioned rapid transport mechanisms for articles, etc., rapid door opening/closing mechanisms, and various other rapid drives.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the basic configuration of a winding transmission device according to the present invention, Fig. 2 is a front view of a heat treatment apparatus to which the winding transmission device according to the present invention is applied, and Figs. 3 and 4 are the same. FIG. Explanation of the code M - Winding is a transmission device, TI, T2 constant? h car, D
l, D2 - movable pulley, S - cylinder, 4 - mediator node. Patent applicant Trinity Industries Co., Ltd.

Claims (1)

[Claims] At least two fixed pulleys arranged apart from each other by a required distance, connected integrally in close proximity to each other, and connected to an appropriate linear reciprocating drive mechanism such as a cylinder to be reciprocated in a direction perpendicular to the support shaft. It consists of two movable pulleys, with an intermediary joint such as a tie belt, i-cord or chain being passed between the fixed pulleys, and both ends of the intermediary joint being wound around each of the movable pulleys. A winding transmission device, characterized in that the winding is fixed at a predetermined position and configured to transmit and utilize the rotation of the fixed pulley obtained by operating the linear reciprocating drive mechanism to drive the movable pulley.