JPH0638808Y2 - Chain conveyor device for hot work products - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a chain conveyor for conveying hot-worked products, which conveys hot-worked products that have heat, such as hot forged products and cast products, in a chain group. Regarding the improvement of the device.

[Prior Art] Conventionally, as a chain conveyor device that conveys a hot worked product, for example, a hot forged product, as shown in FIG. 6 and FIG. 7, a drive side rotary shaft 100 and a driven side rotary shaft 101 are provided. A plurality of drive-side sprockets 102 are arranged in series along the axial direction of the drive-side rotary shaft 100, and a plurality of driven-side sprockets 103 are driven-side rotated. The chains 101 are arranged in series along the axial direction of the shaft 101, and a plurality of endless chains 104 are laid substantially parallel to the corresponding drive side sprocket 102 and driven side sprocket 103 to form a chain group 105. The structure provided is provided. Here, the drive side rotation shaft 100 is connected to a drive motor and is rotated by the drive motor.

Further, in the above chain conveyor device, the forward side 104a of the chain 104 is used as the transport surface, and when the drive motor is rotationally driven, the drive side rotary shaft 100 rotates and the plurality of chains 104 constituting the chain group 105. Rotate substantially parallel between the drive side sprocket 102 and the driven side sprocket 103. Therefore, if the hot forged product is placed on the transfer surface of the chain group 105 on the driven side, the hot forged product is transferred to the drive side.

[Problems to be Solved by the Invention] By the way, in the above-described hot forged product conveying chain conveyor device, since each hot forged product is conveyed, each chain 104 of the chain group 105 tends to expand due to thermal expansion. is there.
At this time, due to the way the hot forged product is placed, the shape and size of the hot forged product, etc., the amount of elongation differs for each endless chain 104, and as a result, the amount of slack differs for each chain 104. There is. In this case, the chain 104
If looseness occurs only on the return side 104b which is the return side of the chain
Although the backward side 104b of the 104 only hangs downward due to gravity, there is a problem in the related art that a bent portion 104c is formed at the forward side 104a. If the chain 104 having the bent portion 104c on the outward side 104a is present, it hinders the normal transportation of the hot forged product, and in some cases, the hot forged product may be scattered during the transportation. Also, since an excessive force tends to act on the bent portion 104c, the chain
The lifespans of 104 and sprocket 103 are shortened accordingly.

The present invention has been made in view of the above circumstances, and an object thereof is to improve the problem of bending of the chain due to thermal expansion of the chain and to transport the hot-worked product which is advantageous for extending the life of the chain and the sprocket. To provide a chain conveyor device.

[Means for Solving the Problems] As a result of earnest studies on the chain conveyor device, the present inventor found that the bent portion on the forward side of the chain is caused by all the driven side sprockets 103 forming the driven side sprocket group.
It has been discovered that this is caused by the fact that all the driven-side sprockets 103 rotate synchronously even though the driven-side rotating shaft 101 is engaged with the key by a key, and the elongation amounts of the chains 104 are different from each other. The inventor of the present invention has developed a plurality of driven source sprockets 10 that form a group of driven side sprockets.
If one of the three is engaged with the driven side rotating shaft 101 and the other remaining driven side sprockets 103 are set in a free state with respect to the driven side rotating shaft 101, the above object can be achieved with a simple structure. I found out. The present invention was devised based on the above findings.

That is, the hot-working product conveying chain conveyor device of the present invention comprises a drive-side base, a drive-side rotary shaft rotatably held by the drive-side base and rotated by a drive source, and an axial direction of the drive-side rotary shaft. Accordingly, there are provided a drive side sprocket group formed by arranging at least two drive side sprockets in series, and a drive side engaging portion for engaging each drive side sprocket and the drive side rotating shaft to integrally rotate them. Drive side sprocket, driven side base, driven side rotation shaft rotatably held on the driven side base, and as many driven side sprockets as drive side sprockets are connected in series along the axial direction of the driven side rotation shaft. The driven side sprocket device has a driven side sprocket group formed by arranging the driven side sprocket and an endless chain of the same number as the driving side sprocket. Each chain is composed of a chain group formed by bridging each driving side sprocket of the driving side sprocket device and each driven side sprocket corresponding to the driving side sprocket, and among the driven side sprocket group of the driven side sprocket device, One driven sprocket arranged at a position excluding both ends in the axial direction of the driven rotating shaft is configured to be engaged with the driven rotating shaft by the driven engaging portion and rotate integrally with the driven rotating shaft. , The power transmission during the integral rotation is in the order of the chain, the driven side sprocket, the driven side engaging portion, and the driven side rotating shaft, and the remaining driven side sprockets in the driven side sprocket group are the driven side rotating shafts. It is characterized in that it has a structure capable of idling.

The drive-side base and the driven-side base may be separate or integrated. Examples of the driving side engaging portion and the driven side engaging portion include a combination of a key and a key groove, a combination of a concave portion and a convex portion,
Means such as inserting a locking pin or bolting can be adopted.

The chain group conveys hot-worked products. The upper surface of each chain that constitutes the chain group is usually used as a transport surface on which the hot-worked product is placed, but in a special example, the hot-worked product is hooked on a hook or the like attached to the chain. You may decide to convey. A known chain such as a pin link type, a roller link type, or a joint link type can be used as the chain.

[Operation] When the drive side rotation shaft is rotated by the drive source, each drive side sprocket is synchronously rotated and each chain is rotated.

On the other hand, in the driven sprocket device, the rotational force of one driven sprocket is transmitted to the driven shaft, and the driven shaft rotates. This is because one driven sprocket is engaged with the driven rotating shaft by the driven engaging portion. However, the other remaining driven sprocket that can idle with respect to the driven rotating shaft does not engage with the driven rotating shaft, and therefore rotates independently of the driven rotating shaft. Therefore, the other remaining driven sprockets individually rotate at a speed corresponding to the amount of elongation of the chain.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

(Structure of Embodiment) The transporting chain conveyor device of this embodiment includes a drive side sprocket device 1 shown in FIG. 1, a driven side sprocket device 2 shown in FIG. 3, and a chain group for carrying hot forged products.
It consists of 42 and. The details will be described below.

First, the drive side sprocket device 1 shown in FIG. 1 will be described. Drive side sprocket device 1 as shown in FIG.
Is a set of two drive side bases 3 and 4 and drive side bases 3 and 4.
Further, it is provided with a drive side rotation shaft 7 rotatably held via collars 5 and 6, and a drive side sprocket group 8.

Here, a sprocket 10 is attached to an end portion on the right side in FIG. 1 of the drive side rotary shaft 7 via a mounting bolt 11 and a contact plate 11a. As shown in FIG. 2, a key groove 15 is formed at the end of the drive side rotary shaft 7, and a key 16 is engaged with the key groove 15 as shown in FIG. By engaging the key 16 with the key groove 15 in this manner, the boss portion 20 is attached to the drive-side rotary shaft 7 at the right end in FIG. A cutting pin 56 having a notch 55 is inserted into a hole of the sprocket 10 via a bush 57, and the pin 56 is further inserted into a hole 20a of the boss portion 20. The sprocket 10 is connected to a motor shaft 13 of a drive motor 12 with a speed reduction mechanism as a drive source shown in FIG. 5 via a chain 14, and when the drive motor 12 is rotationally driven, it is connected via the chain 14. The sprocket 10 rotates, and further, the boss portion 20 rotates with the pin 56 as a transmission shaft, and the drive side rotation shaft 7 rotates in the circumferential direction thereof via the key 16. Here, when an overload acts on the drive motor 12 due to an excessive weight of the hot forged product being conveyed,
The pin 56 is broken through the notch 55, and the rotational force of the sprocket 10 is not transmitted to the boss portion 20. As a result, it is possible to prevent the drive motor 12 from being directly overloaded.

In this embodiment, as shown in FIG. 1, the drive side sprocket group 8 includes five drive side sprockets 20, 21, 22, 23, 24 arranged in series along the axial direction of the drive side rotating shaft 7. Is formed. As shown in FIG. 2, a long key groove 26 is formed in the outer peripheral portion of the drive side rotary shaft 7 so as to extend in the axial direction. On the other hand, 5 drive side sprockets
Each of 20, 21, 22, 23, and 24 has two rows of tooth portions, and key grooves 20a, 21a, 22a, 23a, and 24a are formed on the inner peripheral portions thereof. And the key 9 as the driving side engaging portion
Is a long shape that is closer to the total length of the shaft 7,
Keyway 20 on individual drive side sprockets 20, 21, 22, 23, 24
The a, 21a, 22a, 23a and 24a are engaged with the long key groove 26 of the drive side rotary shaft 7. Therefore, the engagement of the key 9 causes the five drive side sprockets 20, 21, 22, 23, 24 and the drive side rotation shaft 7 to rotate integrally with each other. In addition, 5 drive sprockets 20 to 24 by collars 5 and 6
The axial displacement of the is suppressed.

Next, the driven sprocket device 2 shown in FIG. 3 will be described. As shown in FIG. 3, the driven-side sprocket device 2 includes a set of two driven-side bases 30, 31 and a driven-side base 30,
31 includes a driven-side rotating shaft 34 rotatably held via collars 32 and 33, and a driven-side sprocket group 35.

The driven sprocket group 35 is formed by arranging a total of five driven sprockets 36, 37, 38, 39, 40 having two rows of tooth portions in series along the axial direction of the driven rotating shaft 34. ing.

Here, drive side sprocket 20 and drive side sprocket 20
A chain 43 is installed on the driven side sprocket 36 corresponding to the. A chain 44 is installed on the drive side sprocket 21 and a driven side sprocket 37 corresponding to the drive side sprocket 21. Chain the drive side sprocket 22 and the driven side sprocket 38 corresponding to the drive side sprocket 22.
45 are erected. A chain 46 is installed on the driving sprocket 23 and a driven sprocket 39 corresponding to the driving sprocket 23. A chain 47 is installed on the drive side sprocket 24 and the driven side sprocket 40 corresponding to the drive side sprocket 24. And the chains 43, 44,
A group of chains 42 for forming the hot forged product is formed at 45, 46 and 47. Each chain 43, 44, 45, 46, 47 is made of a steel material and is formed by endlessly connecting roller links formed by bushes and link plates with pin links as in the conventional case.

Now, the configuration of the main part of this embodiment will be further described. That is, in the driven sprocket device 2, as shown in FIG. 3, a key groove 50 is formed in the inner peripheral portion of one driven sprocket 38 in the driven sprocket group 35. On the other hand, as shown in FIG. 4, a key groove 51 having a short length is formed in the center portion of the driven side rotation shaft 34 in the length direction. Then, as shown in FIG. 3, the driven sprocket 38
A key 53 as a driven side engaging portion is engaged with the key groove 50 and the key groove 51 of the driven side rotation shaft 34. as a result,
The driven-side sprocket 38 and the driven-side rotation shaft 34 have a structure of integrally rotating.

Then, the remaining four driven side sprockets 36, 37 other than the driven side sprocket 38 in the driven side sprocket group 35.
The center insertion holes 36a, 37a, 39a, 40a of 39, 40 are fitted to the driven side rotation shaft 34. Therefore, as shown in FIG. 3, the outer peripheral portion of the remaining four driven side sprockets 36, 37, 39, 40 defining the central insertion holes 36a, 37a, 39a, 40a and the outer peripheral portion of the driven side rotating shaft 34 are separated. There is a small gap between
b, 37b, 39b, 40b are formed respectively. Therefore, the remaining four driven side sprockets 36, 37, 39, 40 are configured to be idle with respect to the driven side rotation shaft 34 and are in a free state.

Incidentally, FIG. 5 shows an overall schematic configuration diagram. The entire device is held on a base 59. A chute 60 is provided in the driven sprocket device 2.

(Operation and Effect of Embodiment) Now, the case of using the hot forged product conveying chain conveyor of the present embodiment will be described. In this case, the drive motor 12 shown in FIG. 5 is rotationally driven to rotate the sprocket 10 shown in FIG. 1, and the drive side rotation shaft 7 is rotated in the circumferential direction thereof as described above. Then, the five drive side sprockets 20, 21, 22, 2 engaged by the key 9 are
3 and 24 work together and rotate synchronously. As a result, chain group 4
The second chains 43, 44, 45, 46, 47 run and rotate between the drive side rotary shaft 7 and the driven side rotary shaft 34.
Further, the rotation of the chains 43 to 47 causes the driven side sprockets 36, 37, 38, 39, 40 to rotate. The reason is that the chains 43 to 47 and the teeth of the driven side sprockets 36 to 40 are meshed with each other.

At this time, since the key 53 and the key groove 50 are engaged with each other as shown in FIG. 3, the rotational force of the driven side sprocket 38 is transmitted to the driven side rotation shaft 34, and therefore the driven side sprocket is used.
The driven rotation shaft 34 rotates at the same rotation speed as the rotation speed of 38. At this time, power is transmitted in the order of the chain 45, the driven sprocket 38, the key 53, and the driven rotating shaft 38.

By the way, the hot forged product W forged by the forging device is put into the chute 60. The introduced hot forged product W is placed on the transport surface of the driven chains 43, 44, 45, 46, 47. Then, the hot forged product is turned to the drive side by the arrow A shown in FIG.
Is conveyed in the direction.

At this time, in this embodiment, since the temperature of the hot forged product W is high, the chains 43, 44, 45, 46, 47 may expand due to thermal expansion as in the conventional case. Assuming that the amount of elongation of the chain 45 is the largest here, the amount of slack in the chain 45 is the largest, and therefore one of the five driven side sprockets 36-40 is compared with the state before it was loosened. The rotation speed of the driven sprocket 38 is delayed, and the key 53
The rotational speed of the driven-side rotary shaft 34 engaged with is delayed. However, four driven wheel sprockets 36 in the free state,
Since 37, 39 and 40 rotate independently of the driven rotary shaft 34, there is no particular problem.

Assuming that the chain 45 has the smallest elongation and is hard to loosen, the rotation speed of one driven sprocket 38 that meshes with the chain 45 is equal to that of the remaining driven sprockets 36, 3
7, 39, 40 more than the driven rotary shaft 3
The rotation speed of 4 becomes faster. However, the remaining four driven side sprockets 36, 37, 39, 40 rotate independently of the driven side rotation shaft 34 as described above, so that there is no particular problem.

In the present embodiment, the chains 43, 4 forming the chain group 42
Even if 4, 45, 46, and 47 are extended and loosened, the loosened portion only hangs downward due to gravity on the return path 42b side, and the forward path 42a
On the side, the bent portion as in the conventional case does not occur.

The reason is that idle side driven sprockets 36, 37, 3
This is because 9 and 40 rotate independently of the driven rotary shaft 34 and the driven sprocket 38 as described above, and therefore can rotate in accordance with the amount of extension of the chains 43, 44, 46 and 47.

Of course, in this embodiment, each chain forming the chain group 42 is
Since 43 to 47 are pulled by the drive side sprockets 20, 21, 22, 23 and 24, the traveling speed of the chains 43 to 47 is determined by the rotation speed of the drive side rotating shaft. Therefore, the chain group 42
The traveling speeds of the chains 43 to 47 constituting the above are the same.

By the way, it is possible to adopt a structure in which the driven side rotating shaft 34 does not rotate, but in this case, since the driven side rotating shaft 34 is a fixed type, the driven side rotating shaft 34
The rotational speed difference between the driven side sprocket 36-40 and the driven side sprocket 36-40 becomes very large. Therefore, the driven side sprockets 36, 37, 39,
40 The inner wall surface defining the central insertion holes 36a, 37a, 39a, 40a is worn, or the outer peripheral portion of the driven-side rotary shaft 34 is worn. Therefore, due to wear, the driven side sprockets 36, 3
There may be rattling on 7, 39 and 40. In this respect, in the present embodiment, the driven-side rotating shaft 34 rotates in conjunction with the driven-side sprocket 38 via the key 53. Therefore, the difference in rotational speed between the remaining four driven side sprockets 36, 37, 39, 40 and the driven side rotation shaft can be minimized, so that the problem of wear caused by the rotational speed difference can be solved. It is advantageous in terms of ensuring durability.

[Other Embodiments] Outer peripheral portion of the driven side rotating shaft 34 and the driven side sprocket 3
It is also desirable to interpose a bearing between the inner peripheral portions of 6, 37, 39 and 40 in order to improve the slipperiness between them.

Further, in the above embodiment, the drive side sprockets 20 to 24,
The driven side sprockets 36 to 40 have two rows of teeth as shown in FIGS. 1 and 3, but the invention is not limited to this, and may be one row of teeth or three rows of teeth. May be.

In a special example, an electromagnetic clutch unit is interposed between the driven rotary shaft 34 and the driven sprockets 36, 37, 39, 40, and the electromagnetic clutch unit is turned "on" if necessary. May be connected to the sprockets 36, 37, 39, 40, and the electromagnetic clutch part may be turned "off" to disconnect the power transmission between the driven side rotating shaft 34 and the sprockets 36, 37, 39, 40. . The electromagnetic clutch section is an electromagnetic particle storage section interposed between the shaft 34 and the sprockets 36, 37, 39, 40, an exciting coil section for magnetizing the electromagnetic particles in the storage section, and a disconnection to the exciting coil section. It can be formed with a switching operation unit.

[Advantage of the Invention] According to the hot-working product conveying chain conveyor device of the present invention, the driven sprocket that can idle with respect to the driven rotating shaft rotates independently of the driven rotating shaft. Therefore, even if the amount of expansion of each chain forming the chain group differs due to thermal expansion, the chain only loosens on the return side, which is the return side of the chain group, and on the forward side, which is the outward side of the chain group. It is possible to improve the problem of the bent portion. Therefore, it is advantageous for conveying hot hot-worked products and extending the service life of chains. Further, in the chain conveyor device of the present invention, the difference in rotational speed between the driven side rotating shaft and the other remaining driven side sprockets can be minimized, so that there is a problem of wear between the driven side rotating shaft and the remaining remaining driven side sprockets. Can be improved, which is advantageous for ensuring the durability of the driven rotary shaft and the driven sprocket.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a sectional view of a driving side sprocket device, FIG. 2 is a side view of a driving side rotating shaft, and FIG. 3 is a sectional view of a driven side sprocket device.
FIG. 5 is a side view of the driven side rotating shaft, and FIG. 5 is a schematic side view of the entire device. FIG. 6 is a schematic plan view of a conventional device,
FIG. 7 is a schematic side view of a conventional device. In the figure, 1 is a drive side sprocket device, 2 is a driven side sprocket device, 3 and 4 are drive side bases, 7 is a drive side rotating shaft, 8 is a drive side sprocket group, 9 is a key (drive side engaging part), Reference numerals 30 and 31 denote driven side bases, 34 denotes a driven side rotation shaft, 35 denotes a driven side sprocket group, and 53 denotes a key (driven side engaging portion).

Claims (1)

[Scope of utility model registration request] 1. A drive-side base, a drive-side rotary shaft rotatably held by the drive-side base and rotated by a drive source, and at least three drive-side sprockets along the axial direction of the drive-side rotary shaft. A drive side sprocket device including a drive side sprocket group formed to be arranged in series, and a drive side engaging portion that engages with each drive sprocket and the drive side rotation shaft to integrally rotate, A side base portion, a driven side rotation shaft rotatably held by the driven side base portion, and the same number of driven side sprockets as the driving side sprockets are arranged in series along the axial direction of the driven side rotation shaft. A driven side sprocket device having a driven side sprocket group formed, and an endless chain of the same number as the driving side sprocket, A chain group formed by bridging each of the drive side sprockets of the drive side sprocket device and the driven side sprockets corresponding to the drive side sprockets, and the driven side sprockets of the driven side sprocket device. In the group, one driven sprocket, which is arranged at a position excluding both ends in the axial direction of the driven rotation shaft, is engaged with the driven rotation shaft by a driven engagement portion to rotate the driven rotation. Power is transmitted when the driven-side rotating shaft rotates integrally with the shaft. The power is transmitted to the chain (45), the driven-side sprocket (38), the driven-side engaging portion (53), and the driven-side rotating shaft ( 34), and the remaining driven side sprocket of the driven side sprocket group can idle with respect to the driven side rotating shaft. Hot working products carrying chain conveyor device which is a Do configuration.