JP6908249B2 - Belt take-up device - Google Patents

Description

The present invention relates to a belt winding device.

A sintered body obtained by sintering a molded body obtained by pressure-molding a metal powder such as iron powder is used for automobile parts, general machine parts, and the like. Such a sintered body can be produced by using a mesh belt type continuous sintering furnace using a mesh belt.

FIG. 10 is a cross-sectional explanatory view of a general mesh belt type continuous sintering furnace (hereinafter, also simply referred to as “sintering furnace”) 100. The sintering furnace 100 includes a furnace main body 101 made of metal and having a dome-shaped cross section, and an endless mesh belt 102 running in the furnace main body 101. The work W to be heated is placed on the mesh belt 102. The furnace main body 101 has a degassing zone 103, a sintering zone 104, and a cooling zone 105 in this order from the inlet side (left side in FIG. 10) toward the outlet side. The mesh belt 102 is stretched on a drive pulley 106 provided on the inlet side of the furnace main body 101 and a driven pulley 107 provided on the outlet side. The mesh belt 102 travels in the furnace main body 101 in a state where tensile stress is applied by driving the drive pulley 106 with a motor (not shown). In the sintering zone 104, the mesh belt 102 exposed to a high temperature of, for example, about 1100 to 1200 ° C. is cooled to a temperature of about 100 ° C. when leaving the cooling zone 105. In FIG. 10, reference numeral 108 is a transport roller arranged on the floor surface in order to reduce the resistance of the mesh belt 102 during traveling, and reference numeral 109 is a pit for accommodating the extended mesh belt 102. Is.

The mesh belt 102 is made of stainless steel having high hot strength and heat resistance, for example, SUS310 or SUS316, but is used in an environment where tensile stress acts and the temperature changes as described above. Therefore, high temperature creep causes a large elongation in a relatively short period of time. For example, in the case of a mesh belt having a total length of about 50 m, an elongation of about 1 m may occur in two weeks. For this reason, in the sintering furnace 100, the elongation of the mesh belt 102 is periodically inspected, and every time a predetermined elongation occurs, the mesh belt 102 is cut and joined together for maintenance.

However, when the elongation allowance of the mesh belt 102 reaches the limit, it is necessary to replace the entire mesh belt with a new one. Conventionally, the mesh belt 102 has been replaced manually, and the work of cutting one part of the used mesh belt 102, pulling out a few meters, and cutting the mesh belt 102 has been repeated. The mesh belt 102 is made of metal. For example, in the case of a mesh belt 102 having a width of 100 cm, the mesh belt 102 is very heavy at about 20 kg / m, and the replacement work of the mesh belt 102 is a heavy labor and a dangerous work. In addition, it was necessary to repeat the pulling work and the cutting work every few meters, and it took a long time to complete the work.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a belt winding device capable of safely and easily replacing a mesh belt in a short time.

The belt winding device according to one aspect of the present invention is a belt winding device for winding the mesh belt in a mesh belt type continuous sintering furnace that sinters a work mounted on the mesh belt.
A hollow take-up roll that winds a mesh belt around the outer circumference,
A drive mechanism provided on one end side of the take-up roll in the axial direction to rotate the take-up roll,
A support mechanism provided on the other end side of the take-up roll in the axial direction and rotatably supporting the take-up roll is provided.
The take-up roll is detachably connected to the drive mechanism and the support mechanism.

According to the above invention, the mesh belt can be replaced safely and easily in a short time.

It is explanatory drawing of an example of the mesh belt type continuous sintering furnace provided with the mesh belt wound by the belt winding apparatus of this invention. It is a perspective explanatory drawing of one Embodiment of the belt winding device of this invention. It is a perspective explanatory view of a take-up roll. FIG. 3 is an explanatory cross-sectional view of the take-up roll shown in FIG. It is explanatory drawing of the back side of the belt winding apparatus shown in FIG. It is a partial explanatory view of a drive mechanism. It is a front explanatory view of a rotating body. It is a perspective explanatory view of a support mechanism. It is explanatory drawing of the winding work. It is explanatory drawing of the winding work. It is explanatory drawing of the winding work. It is explanatory drawing of an example of the conventional mesh belt type continuous sintering furnace.

[Explanation of Embodiments of the Present Invention]
First, embodiments of the present invention will be listed and described.
The belt winding device according to one aspect of the present invention is
(1) A belt winding device for winding the mesh belt in a mesh belt type continuous sintering furnace that sinters a work placed on the mesh belt.
A hollow take-up roll that winds a mesh belt around the outer circumference,
A drive mechanism provided on one end side of the take-up roll in the axial direction to rotate the take-up roll,
A support mechanism provided on the other end side of the take-up roll in the axial direction and rotatably supporting the take-up roll is provided.
The take-up roll is detachably connected to the drive mechanism and the support mechanism.

In the belt winding device according to this embodiment, a used mesh belt can be wound around the outer circumference of the hollow winding roll, and the winding roll is provided by a drive mechanism provided on one end side in the axial direction of the winding roll. Driven. Further, since the take-up roll is detachably connected to the drive mechanism and the support mechanism provided on the other end side of the take-up roll in the axial direction, the take-up roll is moved to the drive mechanism and the support mechanism after the take-up is completed. Can be removed from. Therefore, the mesh belt can be wound by simply rotating the winding roll by the drive mechanism without relying on human power, and the mesh belt can be replaced safely and easily. Moreover, since the mechanical force is used, the replacement work can be completed in a short time.

(2) In the belt winding device of the above (1), an opening is formed on the outer peripheral surface of the winding roll, and a wire attached to the end of the mesh belt is locked to the edge of the opening. It is desirable that a hook portion is provided so that the hook portion can be provided. In this case, the end of the mesh belt can be connected to the take-up roll by locking the wire attached to the end of the mesh belt to the hook.

(3) In the belt winding device according to (1) or (2), a wall on which the tip of a rod body inserted from an opening at one end of the winding roll can come into contact with the inner peripheral surface of the winding roll. It is desirable that the body is provided. In this case, the winding roll is wound by pushing the wall body in the axial direction with the rod body inserted from the opening at one end of the winding roll removed from the belt winding device after the winding of the mesh belt is completed. It can be pulled out from the mesh belt. If the end of the mesh belt is temporarily fixed to the winding roll at the start of winding the mesh belt, it is necessary to release the temporary fixing prior to the pushing operation by the rod body.

(4) In the belt winding devices (1) to (3) above, the drive mechanism is connected to a motor, a speed reducer for decelerating the rotation of the motor, and one end in the axial direction of the winding roll, and is operated by the motor. It may be provided with a rotating body that transmits the rotation to the take-up roll. In this case, by rotating the motor, the take-up roll can be rotated via the reducer and the rotating body.

(5) In the belt winding device of the above (4), the rotating body has a short columnar convex portion fitted into an opening at one end in the axial direction of the winding roll, and the circumference of the convex portion. It is desirable that the surface is provided with a positioning pin that engages with a notch formed at one end of the take-up roll in the axial direction. In this case, the contact winding roll can be easily connected to the rotating body of the drive mechanism by engaging the notch of the winding roll with the positioning pin on the peripheral surface of the convex portion of the rotating body. The driving force of the motor can be transmitted to the take-up roll via the positioning pin.

[Details of Embodiments of the present invention]
Hereinafter, the belt winding device of the present invention will be described in detail. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

FIG. 1 is an explanatory view of an example of a mesh belt type continuous sintering furnace provided with a mesh belt wound by the belt winding device of the present invention, and FIG. 2 is a belt winding according to an embodiment of the present invention. It is a perspective explanatory view of the apparatus.

The sintering furnace 1 includes a furnace main body 2 made of metal or the like and having a dome-shaped cross section, and an endless mesh belt 3 running in the furnace main body 2. The mesh belt 3 is made of stainless steel having high hot strength and heat resistance, for example, SUS310 or SUS316. A work W made of a molded body obtained by pressure molding a metal powder such as iron powder is placed on the mesh belt 3.

The furnace main body 2 has a degassing zone 4, a sintering zone 5, and a cooling zone 6 in this order from the inlet side (left side in FIG. 1) toward the outlet side. The mesh belt 3 is stretched on a drive pulley 7 provided on the inlet side of the furnace main body 2 and a driven pulley 8 provided on the outlet side. The mesh belt 3 travels in the furnace main body 2 in a state where tensile stress is applied by driving the drive pulley 7 with a motor (not shown) provided in the vicinity of the drive pulley 7.

In the degassing zone 4, the work W is heated to, for example, about 650 to 750 ° C. by a heating means such as a gas burner or an electric heater. While the work W passes through the degassing zone 4, waxy lubricant components such as zinc stearate and metal soap used for pressure molding of metal powder are thermally decomposed and removed.

The work W that has passed through the degassing zone 4 is heated to a predetermined sintering temperature (for example, about 1100 to 1200 ° C.) in the subsequent sintering zone 5. The heating can be performed by using a heating element such as nichrome or cantal provided in the sintering zone 5. Further, at the time of sintering, an atmospheric gas such as nitrogen gas or modified gas is introduced into the sintering zone 5.

The work W that has passed through the sintering zone 5 is cooled to, for example, about 900 to 100 ° C. by a cooling means such as a water jacket (not shown) provided in the furnace main body 2 in the subsequent cooling zone 6. The work W that has passed through the cooling zone 6 and has been sintered is discharged from the discharge port 9 of the furnace main body 2, and is collected for moving to the subsequent process.

A plurality of transfer rollers 10 are laid on the floor surface below the furnace body 2, and the mesh belt 3 that exits the discharge port 9 of the furnace body 2 and passes through the driven pulley 8 is the transfer roller. It travels on 10 and returns to the drive pulley 7.

A pit 11 is provided on the floor in front of the entrance of the furnace main body 2. The pit 11 is a space for accommodating the mesh belt 3 stretched by high temperature creep. The mesh belt 3 immediately after being replaced is in the state shown by the alternate long and short dash line in FIG. 1, but gradually hangs downward as shown by the solid line as the sintering furnace 1 is operated. When this sagging becomes severe and the mesh belt 3 reaches the bottom surface 11a of the pit 11, the mesh belt 3 is deformed and cannot run normally. Therefore, maintenance of the mesh belt 3 (cutting work and connecting work) is performed in advance. Need to be done. The mesh belt 3 that has passed through the drive pulley 8 is guided into the furnace by a plurality of guide rollers 12.

As shown in FIG. 2, the belt winding device 20 according to the present embodiment includes a winding roll 30 for winding the mesh belt 3 around the outer circumference, a drive mechanism 40 for rotating the winding roll 30, and the winding. It is provided with a support mechanism 50 that rotatably supports the roll. The belt winding device 20 is provided on a base 21 having a substantially U-shape in a plan view. The base 21 is composed of a center member 22, a first side member 23 connected to one end of the center member 22, and a second side member 24 connected to the other end of the center member 22. The drive mechanism 40 is provided on the first side member 23, and the support mechanism 50 is provided on the second side member 24. Each member constituting the base 21 is made of steel. Wheels 25 with stoppers are attached to the lower surfaces of the first side member 23 and the second side member 24 near both ends. The belt winding device 20 can be moved to a place where the mesh belt 3 is wound by using the belt winding device 20, and the wheel 25 can be immobile by the stopper at the time of use. In the belt winding device 20 according to the present embodiment, an electric work drum 61 for supplying electricity from the power source to the drive mechanism 40 is placed when the power source is separated from the belt winding device 20. A tray-shaped table 62 is provided on the upper surface of the second side member 24.

As shown in FIG. 3, the take-up roll 30 is a hollow member having both ends opened, and is made of a steel pipe. The take-up roll 30 has a length (length in the axial direction) slightly larger than the width of the mesh belt 3 to be taken up. In the present specification, the "axial direction" is the longitudinal direction or the pipe axial direction of the take-up roll 30. Further, the one end side in the axial direction is the side connected to the drive mechanism 30 (upper right side in FIG. 3) on both sides of the take-up roll 30 in the axial direction, and is the other end side in the axial direction. Is the side connected to the support mechanism 50 (lower left side in FIG. 3) on both sides of the take-up roll 30 in the axial direction.

An oval or rectangular opening 31 is formed on the outer peripheral surface 30a near the center of the take-up roll 30 in the axial direction. This opening 31 is used when the end of the cut mesh belt 3 is attached to the take-up roll 30, as will be described later. Since the end of the mesh belt 3 is attached manually (manually by the operator), the opening 31 is sized and shaped so that the operator's hand can be put inside the take-up roll 30. There is.

FIG. 4 is an explanatory cross-sectional view of the take-up roll 30 shown in FIG. A hook portion 33 capable of locking a wire (see FIG. 9B) 32 attached to the end portion of the cut mesh belt 3 is provided at the edge portion 31a of the opening portion 31. The hook portion 33 can be manufactured by processing a steel plate or the like, and is fixed to the inner peripheral surface 30b near the edge portion 30a of the take-up roll 30 by welding or the like.

A wall body 34 made of a steel plate or the like is provided inside the take-up roll 30. The wall body 34 is fixed to the inner peripheral surface 30b of the take-up roll 30 by welding or the like. The wall body 34 is used when the winding roll 30 is taken out from the bundle of mesh belts 3 wound in a roll shape on the outer circumference of the winding roll 30 after the winding of the mesh belt 3 is completed. The wall body 34 is provided at a position where the tip of the rod body inserted from the opening 35 at one end of the take-up roll 30 can come into contact with the wall body 34, and the wall body 34 is axially (on the take-up roll 30). By pushing in the axial direction), the take-up roll 30 can be pulled out from the roll-shaped mesh belt 3. As the rod body, fork of a forklift, for example, can be used. When the end portion of the mesh belt 3 is temporarily fixed to the winding roll with the wire 32 at the start of winding the mesh belt 3, the mesh belt 3 is locked to the hook portion 33 prior to the extrusion work by the rod body. It is necessary to remove the existing wire 32 from the hook portion 33.

As shown in FIG. 5, the drive mechanism 40 is provided on the first side member 23 of the base 21 located on one end side in the axial direction of the take-up roll 30. The drive mechanism 40 includes a motor 41, a speed reducer 42 which is provided above the motor 41 and reduces the rotation of the motor 41, and a rotating body 43 (which transmits the rotation of the motor 41 to the take-up roll 30). (See FIGS. 6 and 7). The rotation of the motor 41 is transmitted to the speed reducer 42 via a gear mechanism 44 provided on the upper portion of the motor 41, and a first power transmission device 45 including a sprocket (not shown) and a roller chain (not shown). Will be done. The rotation of the motor 41 decelerated by the speed reducer 42 is transmitted to the take-up roll 30 via a second power transmission device 46 including a sprocket (not shown) and a roller chain (not shown), and a rotating body 43. NS.

As shown in FIG. 6, the rotating body 43 is provided concentrically with the sprocket 47 on the take-up roll 30 side of the pair of sprockets of the second power transmission device 46. The rotating body 43 is formed so as to be integrated with the shaft of the sprocket 47 on the take-up roll 30 side. The rotating body 43 includes a base portion 43a made of a cylindrical body having a small diameter, and a convex portion 43b made of a short cylindrical body having a diameter larger than that of the base portion 43a. The base portion 43a is arranged in a cylindrical first housing 27 provided on the upper surface of the first pillar portion 26 erected on the first side member 23. A first brim 28 is provided at the end of the first housing 27 on the take-up roll 30 side. The end surface of the convex portion 43b on the second power transmission device 46 side faces the first brim portion 28. A torque limiter (not shown) is provided on the base portion 43a of the rotating body 43 in order to prevent an overload from acting on the motor 41 or the like constituting the drive mechanism 40 when the mesh belt 3 is wound up.

The convex portion 43b has a size that can be inserted into the opening 35 at one end in the axial direction of the take-up roll 30. In other words, the diameter of the convex portion 43b is made smaller than the inner diameter of the take-up roll 30 by about 1 mm. A positioning pin 48 is provided on the peripheral surface 43c of the convex portion 43b. The positioning pin 48 can be engaged with a notch 36 formed at one end in the axial direction of the take-up roll 30. When the take-up roll 30 is attached to the belt take-up device 20, the take-up roll 30 can be easily connected to the rotating body 43 by engaging the notch 36 of the take-up roll 30 with the positioning pin 48. .. The positioning pin 48 has a positioning function and also has a function of transmitting the driving force of the motor 41 to the take-up roll 30. As the positioning pin 48, for example, a bolt embedded in the peripheral surface 43c of the convex portion 43b can be used.

The support mechanism 50 is provided on the second side member 24 of the base 21 located on the other end side in the axial direction of the take-up roll 30. The support mechanism 50 rotatably supports the take-up roll 30. In other words, the take-up roll 30 is supported while allowing the take-up roll 30 to rotate. As shown in FIG. 8, the support mechanism 50 includes a pair of support bars 52 attached to a second pillar portion 51 erected on the second side member 24, a support 53, and a second housing 54. And a lever 55.

The support bar 53 is erected on the side surface (side surface on the first side member 23 side) 51a of the first pillar portion 51. A short cylindrical support plate 56 is provided at the tip of the support bar 53. The take-up roll 30 is placed on the support plate 56. The diameter of the support plate 56 is set to be about 1 mm larger than the diameter of the support bar 53 having a cylindrical shape. In this way, the take-up roll 30 is supported by the support plate 56 in a state of being separated from the support bar 53.

The support 53 includes an insertion portion 57 inserted into the opening on the other end side of the take-up roll 30, and a shaft portion 58 having one end connected to the lever 55 and the other end fixed to the insertion portion 57. There is. At the tip of the insertion portion 57, a taper portion 59 is formed so that the insertion portion 57 can be smoothly inserted into the opening on the other end side of the take-up roll 30. A second brim portion 60 is provided at the base of the insertion portion 57. When the insertion portion 57 is inserted into the opening of the take-up roll 30, the side surface 60a of the second brim portion 60 comes into contact with the end face 30c (see FIG. 3) of the take-up roll 30.

The second housing 54 is made of a cylindrical member having a through hole, and a shaft portion 58 of the support 53 is provided in the through hole so as to be movable in the axial direction. The root portion of the lever 55 is rotatably attached to the second pillar portion 51, and as shown by an arrow in FIG. 8, the lever 55 connected to one end of the shaft portion 58 is attached to the second pillar portion 51 along the axial direction. The support 53 can be moved to the first side member 23 side by pushing it toward the 1 side member 23 side, and the support 53 can be moved toward the second side member 24 side by pulling the lever 55 toward the second side member 24 side along the axial direction. It can be moved to the second side member 24 side.

Next, an example of a method of winding the mesh belt 3 using the belt winding device 1 described above will be described.
First, the belt winding device 20 is installed on the inlet side of the furnace main body 2 of the sintering furnace 1 in the vicinity of the pit 11 (see FIGS. 1 and 9A).
Then, the mesh belt 3 of the plurality of guide rollers 12 is fixed to the guide rollers 12 by using a wire or the like in the vicinity of, for example, indicated by A. This is to prevent the end portion of the mesh belt 3 from falling into the pit 11 when the mesh belt 3 is cut, which will be described later.

Then, the mesh belt 3 located on the stage 13 in front of the entrance of the furnace main body 2 is cut. In the cutting work, a pin member (not shown) provided along a direction orthogonal to the longitudinal direction (traveling direction) of the mesh belt 3 may be pulled out, or the pin member may be deformed and pulled out. If this is not possible, it can be done by cutting the pin member with a flat-blade screwdriver or the like.

Then, the wire 32 is attached to one end 3a (the end located on the left side in FIG. 9A) of the cut mesh belt 3 (see FIG. 9B). Then, one end 3a of the mesh belt 3 that has been released from being fixed to the guide roller 12 is attached to the winding roll 30 of the belt winding device 20. At that time, as described above, the wire 32 is locked to the hook portion 33 provided at the edge portion 31a of the opening portion 31 of the take-up roll 30 (see FIG. 9C). This work is performed by the operator holding the tip of the wire 32 in his hand and putting his hand into the take-up roll 30 through the opening 31 of the take-up roll 30.

Next, a new mesh belt 3'that is wound and rolled is arranged on the stage 13 in front of the inlet of the furnace main body 2, and the end thereof is the other end of the mesh belt 3 that was cut first. It is connected to the portion 3b (the end located on the right side in FIG. 9A).

Then, the drive mechanism 40 of the belt take-up device 1 and the drive pulley 7 of the sintering furnace 1 are driven. As a result, the new mesh belt 3'can be arranged in parallel with the winding work of the used mesh belt 3. The rotation speed of the motor 41 for driving the drive mechanism 40 and the motor for driving the drive pulley 7 is adjusted so that the moving speed of the mesh belt is about 40 cm / min.

[Other variants]
The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims.
For example, in the above-described embodiment, a molded body obtained by pressure-molding a metal powder such as iron powder as a work placed on a mesh belt and sintered in a sintering furnace is exemplified. Other substances can be sintered.

1: Sintering furnace 2: Furnace body 3: Mesh belt 3': Mesh belt 3a: End 3b: End 4: Degassing zone 5: Sintering zone 6: Cooling zone 7: Drive pulley 8: Driven pulley 9 : Discharge port 10: Conveying roller 11: Pit 12: Guide 13: Stage 20: Belt winding device 21: Base 22: Center member 23: 1st side member 24: 2nd side member 25: Wheel 26: 1st pillar 27: 1st housing 28: 1st brim part 30: Winding roll 30a: Outer peripheral surface 30b: Inner peripheral surface 30c: Edge 31: Opening 32: Wire 33: Hook part 34: Wall body 35: Opening 36: Notch 40: Drive mechanism 41: Motor 42: Reducer 43: Rotating body 43a: Base 43b: Convex 43d: Peripheral surface 44: Gear mechanism 45: First power transmission device 46: Second power transmission device 47: Sprocket 48: Positioning Pin 50: Support mechanism 51: Second pillar 51a: Side surface 52: Support bar 53: Support 54: Second housing 55: Lever 56: Support plate 57: Insertion 58: Shaft 59: Tapered part 60: Second Brim 61: Electrician drum 62: Table 100: Continuous sintering furnace 101: Furnace body 102: Mesh belt 103: Degassing zone 104: Sintering zone 105: Cooling zone 106: Drive pulley 107: Driven pulley W: Work

Claims (4)

A belt winding device for winding the mesh belt in a mesh belt type continuous sintering furnace that sinters a work placed on the mesh belt.
A hollow take-up roll that winds a mesh belt around the outer circumference,
A drive mechanism provided on one end side of the take-up roll in the axial direction to rotate the take-up roll,
A support mechanism provided on the other end side of the take-up roll in the axial direction and rotatably supporting the take-up roll is provided.
The take-up roll is detachably connected to the drive mechanism and the support mechanism.
Wherein the inner peripheral surface of the winding roll, that have tip can abut a wall of the rod which is inserted from an opening at one end of the winding roll is provided, the belt retractor. The claim that an opening is formed on the outer peripheral surface of the take-up roll, and a hook portion capable of locking a wire attached to an end portion of the mesh belt is provided at an edge portion of the opening. The belt winding device according to 1. The drive mechanism includes a motor, a speed reducer that reduces the rotation of the motor, and a rotating body that is connected to one end of the take-up roll in the axial direction and transmits the rotation of the motor to the take-up roll. Alternatively, the belt winding device according to claim 2. The rotating body has a short columnar convex portion that is fitted into the opening at one end in the axial direction of the take-up roll, and is formed on the peripheral surface of the convex portion at one end in the axial direction of the take-up roll. The belt take-up device according to claim 3 , wherein a positioning pin that engages with the notch is provided.

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