Roller-type conveying device

Abstract

To reduce conveyance troubles of conveyed objects.SOLUTION: A roller-type conveying device 60 includes a plurality of conveying rollers 61 and a separating device 70. The separating device 70 includes a separating member 72 that protrudes between adjacent predetermined conveying rollers 61A among the plurality of conveying rollers 61. When a plurality of conveyed objects A1, A2 is conveyed in a state of being connected in a conveying direction by the plurality of conveying rollers 61, the separating device 70 separates the conveyed objects A1, A2. The separating device 70 causes the separating member 72 to protrude between the adjacent conveying rollers 61A. The separating device 70 holds the rear conveyed object A2 among the plurality of conveyed objects A1, A2, and separates the preceding conveyed object A1.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a roller-type conveying device. [Background technology]

[0002] Japanese Patent Application Laid-Open Publication No. 2022-151151 discloses a roller-type conveying device that conveys multiple conveyed objects placed on conveying rollers in three rows. The roller-type conveying device disclosed in this publication is provided with a stopper that is selectively movable to an upper position or a lower position. The conveyed objects are aligned horizontally in a single row by the stopper that has moved to the upper position. The aligned conveyed objects are sent into a replacement chamber. It is said that by improving the accuracy of alignment of the conveyed objects, the volume of the replacement chamber can be reduced.

[0003] Japanese Patent Application Laid-Open Publication No. 2023-096455 discloses a ceramic firing setter (carried object) on which ceramic parts can be placed and fired. The ceramic firing setter disclosed in this publication is characterized by being made of a base material having a porous layer formed by bonding inorganic fibers. Such a ceramic firing setter is said to be able to reduce heat capacity by reducing weight while maintaining strength. In addition, such a ceramic firing setter is said to have excellent temperature tracking ability. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-151151 [Patent Document 2] Japanese Patent Publication No. 2023-096455 Summary of the Invention [Problem to be solved by the invention]

[0005] When multiple transported objects are transported continuously in the transport direction, there is a concern that transport problems may occur, such as objects in front and behind becoming contiguous. [Means for solving the problem]

[0006] The roller-type conveying device disclosed herein includes a plurality of conveying rollers and a separating device. The plurality of conveying rollers are aligned along a predetermined conveying direction. The separating device protrudes from between predetermined adjacent conveying rollers among the plurality of conveying rollers. When a plurality of conveyed objects are conveyed by the plurality of conveying rollers in a line in the conveying direction, the separating device causes a separating member to protrude from between the adjacent conveying rollers. The separating device is configured to hold the rearmost conveyed object among the plurality of conveyed objects and separate the leading conveyed object. Such a roller-type conveying device reduces conveying problems for the conveyed objects. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram showing a heating device 1. As shown in FIG. [Figure 2] FIG. 2 is a plan view of the roller type transport device 60. As shown in FIG. [Figure 3] FIG. 3 is a side view of the roller type transport device 60. As shown in FIG. [Figure 4] FIG. 4 is a side view of the stopper 80 and the lifter 90. As shown in FIG. [Figure 5] FIG. 5 is a front view of the detachment member 72. FIG. [Figure 6] FIG. 6 is a schematic diagram showing how the transported object A is separated by the separating device 70. As shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] One embodiment of the present disclosure will be described in detail below with reference to the drawings. In the following drawings, components and parts that perform the same function are denoted by the same reference numerals. Furthermore, the dimensional relationships (length, width, thickness, etc.) in each drawing do not reflect the actual dimensional relationships. The directions of up, down, left, right, front, and rear are represented by arrows U, D, L, R, F, and Rr, respectively, in the drawings. Here, the directions of up, down, left, right, front, and rear are defined merely for the convenience of explanation and do not limit the present invention unless otherwise specified.

[0009] 1 is a schematic diagram showing a heating device 1. In the drawing, the direction in which an object A is conveyed is indicated by an arrow.

[0010] <Heating device 1> As shown in Fig. 1, the heating apparatus 1 includes a conveying path 10, a roller-type conveying device 20, a replacement chamber 30, a heating chamber 40, a replacement chamber 50, a roller-type conveying device 60, and a conveying path 15. The heating apparatus 1 is an apparatus for heat-treating an object to be treated while conveying it. In this embodiment, the object to be treated is conveyed while being placed on a setter A, and is heat-treated in the heating chamber 40. Note that the replacement chambers 30 and 50 do not necessarily have to be provided in the heating apparatus 1.

[0011] The setter A is a flat refractory material. In this embodiment, the setter A is substantially rectangular. The shape of the setter A is not particularly limited. The material of the setter A is not particularly limited, but ceramics such as mullite-cordierite, mullite, alumina, spinel-cordierite, magnesia, zirconia, silicon carbide, and the like, carbon, and the like can be used. The shape and material of the setter A can be appropriately selected depending on the type of workpiece, heating conditions, and the like.

[0012] The configuration of the setter A is not particularly limited, but a thin and lightweight setter A may be used from the viewpoint of improving the heating efficiency of the workpiece. By using a light setter A, the temperature of the setter A can easily follow the temperature inside the heating chamber 40. This makes it easier for the temperature of the workpiece placed on the setter A to rise, improving the processing efficiency of the workpiece. The setter A may also contain inorganic fibers. By using a setter A containing inorganic fibers, the setter A can become lighter. This can improve the processing efficiency of the workpiece. The setter A may have holes formed therein. A plurality of holes may be formed in the setter A. By forming holes in the setter A, the breathability above and below the setter A can be improved. Hereinafter, the setter A on which the workpiece is placed will also be referred to as the transported object A, as appropriate.

[0013] In this embodiment, the object A is transported in the following order: transport path 10, replacement chamber 30, heating chamber 40, replacement chamber 50, and transport path 15. The roller-type transport device 20 transports the object A from the transport path 10 toward the replacement chamber 30. The roller-type transport device 60 transports the object A from the replacement chamber 50 toward the transport path 15. In the roller-type transport device 20, replacement chamber 30, heating chamber 40, replacement chamber 50, and roller-type transport device 60, the transport direction of the object A is set to be approximately linear. In the transport paths 10 and 15, the transport direction of the object A is set to be approximately perpendicular to the transport direction of the heating chamber 40, etc. This allows the equipment to be made more compact. In the transport path 10, the object A is transported from right to left. In the roller-type conveying device 20, the replacement chamber 30, the heating chamber 40, the replacement chamber 50, and the roller-type conveying device 60, the conveyed objects A are arranged in two rows and conveyed from rear to front. In the conveying path 15, the conveyed objects A are conveyed from left to right.

[0014] <Transport path 10> On the conveying path 10, although illustrations and detailed description are omitted, a plurality of conveyed objects A placed in a container (not shown) with vertical gaps between them are conveyed along the conveying direction. The plurality of conveyed objects A may be conveyed in a state where they are placed in a container that has a plurality of support portions along the height direction that can support opposite sides of a rectangular setter A, similar to the container 16 (see FIG. 3) described below. The conveyed objects A are conveyed toward the replacement chamber 30 by a roller-type conveying device 20. The conveyed objects A are conveyed into the replacement chamber 30 sequentially with gaps between them.

[0015] The roller-type conveying device 20 includes a plurality of conveying rollers 21 arranged along the conveying direction. The conveyed object A is placed on the conveying rollers 21 of the roller-type conveying device 20 by a fork (not shown). The plurality of conveying rollers 21 are rotationally driven by a drive device (not shown).

[0016] <Replacement room 30> The replacement chamber 30 is a chamber for exposing the workpiece to the same atmospheric gas as that in the heating chamber 40 before introducing it into the heating chamber 40. The configuration of the replacement chamber 30 may be the same as that of conventionally known replacement chambers, and therefore a detailed description thereof will be omitted. When the workpiece A is transferred to the replacement chamber 30, the transfer of the workpiece A is stopped, and a shutter (not shown) is closed. In the replacement chamber 30, the atmospheric gas is exhausted, and the same atmospheric gas as that in the heating chamber 40 can be introduced. As a result, the atmosphere in the replacement chamber 30 can be replaced with the same atmospheric gas as that in the heating chamber 40. When the atmosphere in the replacement chamber 30 is switched, the shutter on the heating chamber 40 side is opened, and the workpiece A can be transferred to the heating chamber 40.

[0017] <Heating chamber 40> The heating chamber 40 is a chamber for heating the workpieces placed on the setter A. The heating chamber 40 continuously heats the setter A on which the workpieces are placed while transporting it along the transport direction. In the heating chamber 40, the workpieces A are transported at intervals. In this embodiment, the heating chamber 40 is a so-called roller hearth kiln in which the workpieces are heat-treated while the setter A is transported by the rotation of multiple transport rollers 41. The configuration of the heating chamber 40 may be the same as that of a conventionally known roller hearth kiln.

[0018] The heating chamber 40 includes a furnace body 42. The furnace body 42 is formed in a tunnel shape. The furnace body 42 surrounds a transport space 43 in which the transported object A is transported. The furnace body 42 can be formed, for example, by stacking ceramic fiber boards formed into a predetermined shape. The furnace body 42 may also be formed from bricks having fire resistance and heat insulation. In the transport space 43, a plurality of transport rollers 41 are arranged along the transport direction.

[0019] The multiple conveying rollers 41 are arranged at a predetermined height in the conveying space 43. The multiple conveying rollers 41 can be driven by a drive mechanism (not shown) provided outside the furnace body 42. The drive mechanism can include, for example, a chain rail, a sprocket, a motor, etc. The multiple conveying rollers 41 can be driven to rotate in the same direction and at the same speed by the drive mechanism. The object A placed on the conveying rollers 41 is conveyed in the conveying direction (forward) by the rotation of the conveying rollers 41.

[0020] A heater (not shown) is provided in the transfer space 43. The heater is a device for heating the workpiece. A cylindrical ceramic heater can be used as the heater. However, the heater is not limited to a ceramic heater. Various heaters can be used depending on the heating conditions, etc. For example, a metal sheath heater can be used as the heater. Furthermore, the shape of the heater is not particularly limited, and for example, a plate-shaped panel heater can be used. A gas burner or the like can be used as the heater. The heated transfer object A is transferred to the substitution chamber 50.

[0021] <Replacement room 50> The substitution chamber 50 is a chamber for switching the atmosphere before exposing the object to the atmosphere downstream of the heating chamber 40 (open air in this embodiment). The configuration of the substitution chamber 50 may be the same as that of the substitution chamber 30. The object A transported to the substitution chamber 50 is stopped, and the atmosphere inside the substitution chamber 50 is switched. Thereafter, the shutter on the exit side is opened, and the object A can be transported toward the transport path 15 by the roller-type transport device 60.

[0022] The object A is placed on the plurality of conveying rollers 61 of the roller-type conveying device 60. The plurality of conveying rollers 61 convey the object A placed on the plurality of conveying rollers 61 toward the conveying path 15.

[0023] <Transport path 15> Although not shown in the drawings or described in detail, a plurality of objects A are transported along the transport path 15 with vertical gaps between them. The objects A are transported from the replacement chamber 50 to the transport path 15 by a roller-type transport device 60. From the replacement chamber 50, a plurality of objects A lined up along the transport direction are sequentially transported with gaps between them. The objects A are transported along the transport direction on the transport path 15. Thereafter, the objects placed on the setter A can be collected.

[0024] FIG. 2 is a plan view of the roller-type conveying device 60. FIG. 2 shows a schematic plan view of the roller-type conveying device 60 as seen from above. FIG. 3 is a side view of the roller-type conveying device 60. FIG. 3 shows a schematic view of the roller-type conveying device 60 as seen from right to left. In FIG. 3, the positions to which the stopper 80, arm member 92, and fork 95 can move are indicated by two-dot chain lines. FIG. 4 is a side view of the stopper 80 and lifter 90. In FIG. 4, the state in which the arm member 92 is lifting the object A to be conveyed and the state in which the stopper part 81 is retracted are indicated by two-dot chain lines.

[0025] <Roller-type conveying device 60> As shown in FIG. 2, the roller-type conveying device 60 includes a plurality of conveying rollers 61 arranged along the conveying direction. The plurality of conveying rollers 61 are arranged from the exit of the replacement chamber 50 toward the conveying path 15. The conveying path for the conveyed object A is defined by the plurality of conveying rollers 61. The conveying path for the conveyed object A is set to a path passing through the upper ends of the plurality of conveying rollers 61. A sensor for detecting the conveyed object A may be provided on the conveying path. The roller-type conveying device 60 includes a stop sensor 67 and a misalignment detection sensor 68 on the conveying path. The stop sensor 67 and the misalignment detection sensor 68 each detect the conveyed object A at a predetermined position on the conveying path. Although not particularly limited, optical sensors or the like may be used as the stop sensor 67 and the misalignment detection sensor 68. In a roller-type conveying device 60 in which the conveyed object A is conveyed in multiple rows, a sensor may be provided to detect the conveyed object A in each row.

[0026] <Conveyor roller 61> The conveying rollers 61 are aligned at the same height so as to be able to support the object A to be conveyed, and are arranged at a predetermined pitch. Each of the multiple conveying rollers 61 includes a shaft 61a and a roller body 61b. The shaft 61a constitutes the rotation axis of the conveying roller 61. The shaft 61a is approximately cylindrical. Multiple roller bodies 61b are attached to the shaft 61a. The roller bodies 61b are ring-shaped members with a diameter larger than that of the shaft 61a. The multiple roller bodies 61b are arranged intermittently in the direction in which the shaft 61a extends. The object A to be conveyed is supported by at least two of the multiple roller bodies 61b (three roller bodies 61b in this embodiment). The multiple conveying rollers 61 are rotationally driven by a driving device 62. The object A to be conveyed is conveyed on the rotating conveying rollers 61 in the conveying direction. The driving device 62 may be, for example, a motor.

[0027] The plurality of conveying rollers 61 are supported by a pair of support plates 63 via bearings (not shown). One end (the right end in this embodiment) of the plurality of conveying rollers 61 protrudes outward from the support plate 63. A sprocket 64 is attached to the right end of the conveying roller 61. A circular chain 65 is looped around the sprocket 64. The chain 65 is further looped around a sprocket (not shown) connected to the rotating shaft of a driving device 62. The loop path of the chain 65 is set to include the sprocket connected to the rotating shaft of the driving device 62 and the sprocket 64. As a result, the driving force of the driving device 62 is transmitted to the plurality of conveying rollers 61 via the chain 65. As a result, the plurality of conveying rollers 61 are rotated at a substantially constant speed. The chain 65 may also be looped around a guide roller, a tension roller, or the like (not shown).

[0028] The transport speed of the transported object A transported on the plurality of transport rollers 61 is set to be faster than the transport speed of the transported object A transported through the substitution chamber 50 and the heating chamber 40.

[0029] The roller-type conveying device 60 further includes a stopper 80 and a lifter 90. As shown in Fig. 3, in the roller-type conveying device 60, the conveyed object A conveyed on the conveying rollers 61 is stopped by the stopper 80 at a predetermined stopping position B1 on the conveying path defined by the plurality of conveying rollers 61. The conveyed object A stopped by the stopper 80 is lifted by the lifter 90 and carried to the conveying path 15 by the fork 95.

[0030] In this embodiment, stop position B1 is set before the conveying path 15. Stop position B1 may be set appropriately depending on the application of roller-type conveying device 60, the configuration of the conveying destination, etc. Stop sensor 67 is provided at stop position B1 to detect when conveyed object A reaches stopper 80. Furthermore, deviation detection sensor 68 is provided upstream of stop position B1 in the conveying direction. Deviation detection sensor 68 can detect deviation of conveyed object A during conveyance.

[0031] At stop position B1, lifter 90 has an arm member 92 that protrudes from between conveying rollers 61 and lifts up conveyed object A. When arm member 92 is positioned below the upper ends of conveying rollers 61, stopper 80 protrudes above the upper ends of conveying rollers 61. Stopper 80 is configured to move away from stop position B1 toward the front in the conveying direction of conveyed object A as arm member 92 rises.

[0032] When the transported object A is lifted by the arm member 92 of the lifter 90 at the stop position B1, the stopper portion 81 moves away from the stop position B1. Therefore, when the transported object A is lifted by the arm member 92 of the lifter 90, the stopper 80 does not interfere with the transported object A, making it less likely that transport problems will occur. The lifter 90 and the stopper 80 will be described in more detail below.

[0033] <Lifter 90> The lifter 90 is provided below the stop position B1 so as to be able to lift the transported object A stopped at the stop position B1. The lifter 90 has an arm member 92 and an elevating device 91.

[0034] <Arm member 92> The arm member 92 is a member that lifts the transported object A. As shown in Fig. 4, the arm member 92 includes a base 92f and arms 92a to 92d. The base 92f is a plate-shaped portion. The arms 92a to 92d are provided on the base 92f so as to protrude upward.

[0035] In this embodiment, the arm member 92 includes four arms 92a to 92d arranged along the conveying direction. Each of the arms 92a to 92d is a plate-shaped member. A gap is formed in each of the arms 92a to 92d in the width direction (left and right direction) to allow for insertion of a fork 95, which will be described later. In this embodiment, of the arms 92a to 92d, the arms 92a to 92c are directly attached to the base 92f at a predetermined interval corresponding to the gap between the conveying rollers 61. The arms 92a to 92c and the base 92f may be formed, for example, by cutting out a single plate and bending the arms 92a to 92c relative to the base 92f. Of the arms 92a to 92d, the arm 92d is prepared by bending a separate plate and attached to the front surface 92c1 of the arm 92c, which is the frontmost of the arms 92a to 92c. The base end of the arm 92d is located higher than the base 92f. A reinforcing plate 92e may be attached to the base end of each of the arms 92a to 92d in order to increase the strength of the arms 92a to 92d.

[0036] The upper ends of the arms 92a to 92d are at approximately the same height. The upper ends of the arms 92a to 92d are bent approximately vertically so as to fit along the underside of the load A. The upper ends of the arms 92a to 92c are bent backward. The upper end of the arm 92d is bent forward. This makes it easier to stably support the load A. The shape and number of the arms 92a to 92d provided on the arm member 92 are not limited to the form shown in FIG. 4.

[0037] <Lifting device 91> The lifting device 91 is a device that lifts and lowers the arm member 92. Here, the lifting device 91 is configured as a cylinder device and includes a cylinder portion 91a and a lifting shaft 91b extending upward. Although not shown, the cylinder portion 91a is fixedly disposed below the conveying roller 61 at the stop position B1. The lifting shaft 91b is configured to be lifted up and down relative to the cylinder portion 91a by a cylinder mechanism. A base portion 92f of the arm member 92 is connected to the upper end of the lifting shaft 91b. When the lifting shaft 91b is lowered, the arms 92a to 92d are positioned lower than the stop position B1. In other words, when the lifting shaft 91b is lowered, the upper ends of the arms 92a to 92d are positioned lower than the upper ends of the conveying roller 61. When the lift shaft 91b rises, the base 92f of the arm member 92 rises, and the upper ends of the arms 92a to 92d rise above the transport rollers 61 (position C2). When the transport object A is at the stop position B1, when the lift shaft 91b rises, the arm member 92 rises, and the transport object A is lifted. In this way, the arms 92a to 92d are configured to protrude from between the transport rollers 61 and retract downward at the stop position B1.

[0038] <Stopper 80> The stopper 80 is a member that stops the transported object A transported on the plurality of transport rollers 61 at the stop position B1. As shown in FIG. 4, the stopper 80 has a stopper portion 81 and a base portion 82.

[0039] The stopper portion 81 is a portion that stops the transported object A. The stopper portion 81 is disposed in front of the foremost transport roller 61(a) at the stop position B1. The stopper portion 81 extends upward in front of the foremost transport roller 61(a). The base portion 82 is disposed so as to extend from the lower end of the stopper portion 81 below the foremost transport roller 61(a). In this embodiment, the stopper 80 is formed of a plate-like member bent into an L shape, and the stopper portion 81 is formed on one plate portion of the plate-like member bent into an L shape. The base portion 82 is formed on the other plate portion of the plate-like member bent into an L shape. In this embodiment, the stopper portion 81 and the base portion 82 are approximately perpendicular. The stopper portion 81 and the base portion 82 may be formed by bending a single plate or may be formed from separate members.

[0040] In this embodiment, the stopper 80 has a rotation shaft 83. The rotation shaft 83 is disposed below the frontmost conveying roller 61(a). The rotation shaft 83 swings the stopper portion 81 between a predetermined position in front of the stop position B1 and a predetermined position away from the stop position B1. The range over which the stopper portion 81 swings will be described later.

[0041] In this embodiment, the base 82 is provided with a flange 82a that protrudes upward. The flange 82a is a plate-shaped portion that is perpendicular to the roller axial direction of the conveying roller 61. An insertion hole through which a shaft 83 is inserted is formed in the flange 82a. The shaft 83 is inserted into the insertion hole of the flange 82a and extends along the conveying roller 61. The shaft 83 is fixedly disposed by a support member (not shown). The stopper 81 and the base 82 are configured to move in the circumferential direction of the shaft 83, using the shaft 83 as the rotation axis. In this way, the rotation axis that swings the stopper 81 is set by the shaft 83. The tip of the base 82 extends below the front end 92f1 of the base 92f of the arm member 92.

[0042] Furthermore, in this embodiment, the roller-type conveying device 60 is provided with a stopper mechanism 84 that operates the stopper 80. The stopper mechanism 84 includes a support plate 85, a shaft 86, and a biasing member 87. The stopper 80 is configured to operate in conjunction with the lifting device 91 of the arm member 92.

[0043] Here, the support plate 85 is a member bent in a substantially L-shape. One plate portion 85a of the support plate 85 is attached to the front surface of an elevating device 91, which will be described later. The other plate portion 85b of the support plate 85 extends forward from an upper portion of the one plate portion 85a and faces the base portion 82 below the base portion 82 of the stopper 80. A through hole 85b1 for attaching the shaft 86 is formed in the other plate portion 85b of the support plate 85. A through hole 82b is similarly formed in the base portion 82 at a position opposite to the through hole 85b1 of the other plate portion 85b of the support plate 85.

[0044] The shaft 86 is attached to the other plate portion 85b of the support plate 85 so as to extend upward. The biasing member 87 is a member that biases the base portion 82 upward. When the biasing member 87 moves the base portion 82 upward, the stopper portion 81 rotates around the rotation shaft 83 in a direction away from the front of the foremost conveying roller 61(a).

[0045] In this embodiment, the biasing member 87 is composed of a coil spring 87a attached to a shaft 86. The shaft 86 is a bolt shaft inserted into an insertion hole formed in the other plate portion 85b of the support plate 85. The upper end of the shaft 86 is a bolt head 86a, and is disposed above a through-hole 85b1 in the other plate portion 85b of the support plate 85. The lower end of the shaft 86 is inserted into the other plate portion 85b of the support plate 85, and a nut 86b is attached to the shaft 86. A ring 86c serving as a spring seat is attached to the shaft 86 above the other plate portion 85b of the support plate 85. The ring 86c has an outer diameter larger than the through-hole 85b1 in the other plate portion 85b of the support plate 85, and is shaped so that it will not slip out of the through-hole 85b1. A coil spring 87a serving as the biasing member 87 is inserted onto the shaft 86 and is attached in a compressed state between the upper surface of the other plate portion 85b of the support plate 85 and the lower surface of the ring 86c.

[0046] When the base 82 of the stopper 80 is not restricted, the base 82 is pushed upward by the elastic reaction force of the coil spring 87a serving as the biasing member 87, as shown by the two-dot chain line in Fig. 4. As a result, the stopper 80 rotates clockwise around the rotation shaft 83 so that the stopper portion 81 moves forward in the conveyance direction and away from the stop position B1. At this time, the rotation of the stopper 80 is restricted when the base 82 abuts against the head 86a of the shaft 86.

[0047] On the other hand, the tip of the base 82 extends below the end 92f1 of the base 92f of the arm member 92. Therefore, when the base 92f of the arm member 92 is lowered by the lifting device 91, the rear end 82c of the base 82 of the stopper 80 is pushed down. As a result, as shown by the solid line in Figure 4, the stopper portion 81 of the stopper 80 rotates counterclockwise around the rotation shaft 83 toward the front of the foremost conveyance roller 61(a) at the stop position B1.

[0048] The roller-type conveying device 60 is provided with a regulating member 88. The regulating member 88 is provided below the multiple conveying rollers 61. FIG. 4 illustrates a state in which the conveyed object A conveyed on the conveying rollers 61 hits the stopper portion 81. The regulating member 88 is provided at an intermediate position of the stopper portion 81. When the base portion 92f is pressed down with the conveyed object A not at the stop position B1, the stopper portion 81 hits the regulating member 88 but does not hit the tip of the arm 92d. In other words, when the lifter 90 is lowered, the stopper 80 stops at the stop position B1. The rotation of the stopper 80 stops when the regulating member 88, which is attached at an intermediate position of the stopper portion 81, hits the intermediate position of the arm 92d. The regulating member 88 may be a cushioning member. In this way, the range of movement of the stopper portion 81 (and the base portion 82) may be determined by the restricting member 88 and the head portion 86a of the shaft 86.

[0049] In this manner, when the arm member 92 is lowered by the lifting device 91, the base 82 of the stopper 80 is pushed down in response to the descent of the arm member 92. As a result, the stopper portion 81 rotates counterclockwise and projects upward in front of the foremost conveying roller 61(a) above the upper end of the conveying roller 61. When the object A conveyed by the conveying roller 61 hits the stopper portion 81, the stopper portion 81 can be pushed by the object A. At this time, the rear end portion 82c of the base portion 82 is positioned to hit the underside of the base portion 92f of the arm member 92, and the stopper portion 81 is supported in this state. As a result, the object A can be stopped by the stopper portion 81.

[0050] Thereafter, when the arm member 92 is raised by the lifting device 91, the base 82 of the stopper 80 is released, and the base 82 of the stopper 80 is pushed up by the elastic reaction force of the coil spring 87a, and the stopper portion 81 moves away from the stop position B1. At this time, in this embodiment, the stopper portion 81 moves away from the transported object A before the upper ends of the arms 92a to 92d come into contact with the transported object A. Therefore, when the transported object A is lifted by the arms 92a to 92d, the stopper portion 81 is away from the transported object A. Therefore, the stopper 80 does not interfere when the transported object A is lifted by the arms 92a to 92d, and transport problems are prevented.

[0051] As shown in Fig. 3, the transported object A lifted by the lifter 90 is carried to the transport path 15 by the fork 95 and is sequentially placed into the container 16 arranged on the transport path 15. Note that in Fig. 3, the container 16 is shown schematically so that the support part 17 provided inside is shown.

[0052] <Folk 95> The forks 95 extend forward. The forks 95 are long enough to support the object A. The forks 95 are driven in the conveying direction and the up-down direction to transport the object A to the container 16. While detailed description is omitted, the container 16 is a roughly rectangular box. A pair of support portions 17 that support the object A are provided on a pair of widthwise (left-right) side surfaces of the container 16. The pair of support portions 17 protrude inward from both widthwise sides of the container 16 so as to support the object A from both sides. The container 16 is provided with multiple support portions 17 along its height so as to accommodate multiple objects A. The container 16 can accommodate multiple objects A spaced apart in the height direction. The rear surface of the container 16 is open. This allows the forks 95 and the object A to be inserted into the container 16 from the rear. Although detailed illustration is omitted, the container 16 is raised and lowered by an actuator 18.

[0053] The fork 95 is driven by a first actuator 96 and a second actuator 97. The first actuator 96 drives the fork 95 in the front-to-rear direction. The second actuator 97 drives the fork 95 in the up-and-down direction.

[0054] The roller-type conveying device 60 includes a control device 100. The control device 100 is configured to be able to communicate with the lifter 90. The control device 100 is also configured to be able to communicate with a stop sensor 67 and a deviation detection sensor 68. The control device 100 may also control a first actuator 96 and a second actuator 97 that drive the fork 95. The control device 100 may also control the driving of an actuator 18 that raises and lowers the container 16. The process of driving the lifter 90 and the fork 95, which is executed by the control device 100, will be described below. In FIG. 3, the positions of the lifter 90 are indicated by C1 and C2, and the positions of the fork 95 are indicated by D1 to D5.

[0055] Before the lifter 90 lifts the transported object A (position C1), the forks 95 are retracted (position D1) in front of the stop position B1. When the stop sensor 67 detects that the transported object A reaches the stop position B1 and hits the stopper 80, the lifter 90 lifts the transported object A (position C2). The forks 95 are driven downward and forward and inserted into the gaps of the arm members 92 (position D2). At this time, the forks 95 are positioned below the transported object A. The forks 95 are driven upward, and the transported object A is lifted from the lifter 90 (position D3). The forks 95 are driven forward and inserted into the rear of the container 16 (position D4). At this time, the transported object A supported by the forks 95 is contained in the container 16. The forks 95 are driven downward (position D5), and the transported object A is supported by the support portions 17 of the container 16. The forks 95 are again retracted to a position closer to the stop position B1 (position D1). After the forks 95 lift up the transported object A, the lifter 90 is driven downward again (position C1).

[0056] Furthermore, the control device 100 may control the lifter 90 and the fork 95 in accordance with the state of the transported object A detected by the deviation detection sensor 68 in addition to the stop sensor 67. The deviation detection sensor 68 can detect deviations in the transport of the transported object A. The deviation detection sensor 68 is provided upstream of the stop position B1. The deviation detection sensor 68 detects the transported object A at a detection position B2, which is upstream of the stop position B1 in the transport direction. When the transported object A is stopped by the stopper 80, the transported object A is not normally detected at the detection position B2. However, when the transported object A is transported in multiple rows and the transported objects A in each of the multiple rows are misaligned, even if the stop sensor 67 detects the transported object A, the deviation detection sensor 68 can detect the transported object A at the detection position B2. When the transported object A passes the detection position B2, the deviation detection sensor 68 no longer detects the transported object A. At this time, the transported objects A that have been transported later catch up with the transported objects A stopped by stopper 80, and the multiple rows of transported objects A are aligned by stopper 80. The drive of lifter 90 and fork 95 can be started after stop sensor 67 detects transported object A and deviation detection sensor 68 no longer detects transported object A. Furthermore, deviation detection sensor 68 can detect a state in which the approximately rectangular transported objects A are tilted with respect to the transport direction, regardless of whether transported objects A are transported in multiple rows or multiple rows.

[0057] In this embodiment, even after the transported object A is stopped by the stopper 80, the rotation of the transport rollers 61 is not stopped but is rotated at a substantially constant speed. By continuing to rotate the transport rollers 61, the transport speed of the transported object A tends to be stable. This makes it possible to improve the transport cycle for sequentially transporting the transported object A.

[0058] When the object A is placed in the container 16, the actuator 18 drives the container 16 upward by the distance corresponding to the spacing between the support members 17 in the height direction. As a result, even when the container 16 moves to the position (positions D4 and D5) through which the fork 95 and the object A are inserted, the object A is not placed on the support members 17. After the object A is placed on the support members 17 of the container 16, the container 16 gradually rises, and the object A is sequentially placed in the container 16 from the top to the bottom. The object A is placed on the lowest support member 17 of the container 16. It is considered that the object A is placed on all levels of the container 16, and the container 16 is conveyed to the right along the conveying path 15 (see FIG. 1). The container 16 can be conveyed to the right, for example, by a pusher (not shown). Note that the direction in which the container 16 is driven after the object A is placed is not particularly limited.

[0059] In a roller-type conveying device equipped with multiple conveying rollers for conveying the conveyed object, a stopper for stopping the conveyed object, and a lifter for lifting the conveyed object, there is a concern that the stopper may interfere with the conveyed object. For example, when the stopper extends upward when the conveyed object is lifted by the lifter, the conveyed object may be lifted along the stopper. At this time, the front end of the conveyed object is lifted while hitting the stopper. This may cause vibrations to be applied to the conveyed object or damage the conveyed object. This problem is particularly pronounced when a lightweight setter is used as the conveyed object. For example, a lightweight setter may be subject to relatively greater vibrations from the stopper than a heavy setter. This raises the concern that the workpiece placed on the setter may fall. Furthermore, for example, a lightweight setter may have lower strength than a heavy setter. This makes the setter more susceptible to damage.

[0060] In the above-described embodiment, the roller-type conveying device 60 includes a plurality of conveying rollers 61, a stopper 80, and a lifter 90. The conveying rollers 61 are aligned along a predetermined conveying direction. The stopper 80 stops the conveyed object A being conveyed on the conveying rollers 61 at a predetermined stop position B1 along the conveying path defined by the conveying rollers 61. The lifter 90 lifts the conveyed object A that has stopped at stop position B1. The lifter 90 includes an arm member 92. The arm member 92 protrudes from between the conveying rollers 61 at stop position B1 to lift the conveyed object A. When the arm member 92 is positioned below the upper ends of the conveying rollers 61, the stopper 80 protrudes above the upper ends of the conveying rollers 61. The stopper 80 is configured to move forward in the conveying direction away from stop position B1 as the arm member 92 rises. In this roller-type conveying device 60, after the stopper 80 stops the conveyed object A, the stopper 80 moves away from the stop position B1 where the conveyed object A is placed in conjunction with the rise of the arm member 92. As a result, the conveyed object A is less likely to interfere with the stopper 80 when it is raised.

[0061] In the embodiment described above, the stopper 80 has a stopper portion 81 and a rotating shaft 83. The stopper portion 81 is disposed in front of the foremost conveying roller 61(a) at the stop position B1. The rotating shaft 83 is disposed below the foremost conveying roller 61(a). The rotating shaft 83 swings the stopper portion 81 between a predetermined position in front of the stop position B1 and a position away from the stop position B1. The stopper portion 81, which comes into contact with the conveyed object A, tilts forward about the rotating shaft 83 so as to move away from the stop position B1. This allows the stopper portion 81 to move smoothly away from the conveyed object A. Furthermore, as the conveyed object A rises, the gap between the stopper 80 and the stopper 80 increases, which makes it easier to prevent interference between the conveyed object A and the stopper 80.

[0062] In the embodiment described above, the stopper 80 has a base 82 that extends from the lower end of the stopper portion 81 below the foremost conveying roller 61(a). The roller-type conveying device 60 further includes a biasing member 87. The biasing member 87 biases the base 82 upward, causing the stopper portion 81 to rotate toward the front of the foremost conveying roller 61(a). As the arm member 92 descends, the lifter 90 presses the base 82 downward to move the stopper portion 81 to the stop position B1. This mechanically links the movement of the arm member 92 upward with the movement of the stopper portion 81 away from the stop position B1. This eliminates the need to individually control the movements of the stopper 80 and the lifter 90, making it possible to suppress interference between the conveyed object A and the stopper 80 with a simple configuration.

[0063] In the above-described embodiment, a regulating member 88 that stops the stopper 80 (in this embodiment, the stopper portion 81) at the stop position B1 when the lifter 90 descends is provided below the plurality of conveying rollers 61. This ensures good positional accuracy when the stopper 80 returns to the stop position B1.

[0064] The configuration of the stopper and the lifter is not limited to the above-described embodiment, as long as the stopper moves away from the stop position as the lifter rises. For example, the stopper and the lifter may be controlled separately by a control device. Furthermore, the stopper does not need to be configured to tilt forward about the axis, but may be configured to slide forward away from the stop position.

[0065] In a heating device in which conveyed objects are conveyed at intervals, for example, the spacing between the front and rear conveyed objects may be narrowed in the heating chamber (and the replacement chamber). By narrowing the spacing between the front and rear conveyed objects, more objects can be processed per unit time, thereby improving the processing efficiency of the objects. However, narrowing the spacing between the front and rear conveyed objects increases the risk of the front and rear conveyed objects meandering and coming into contact due to unavoidable events, such as deformation of the conveying rollers in the heating chamber due to heat. For example, when the conveyed objects are thin, the front and rear conveyed objects may partially overlap. If the conveyed objects are conveyed in a line with some overlap, conveyance problems may occur. For example, in the roller-type conveyance device 60 described above, if conveyed object A is conveyed in a line with the front and rear, there is a concern that the lifter 90 may not be able to lift the conveyed object A.

[0066] As shown in FIG. 3, the roller-type conveying device 60 includes a separating device 70 .

[0067] <Disconnecting device 70> The separation device 70 includes a lifting device 71 and a separation member 72. The lifting device 71 and the separation member 72 are disposed below the transport rollers 61. The separation device 70 is provided on the upstream side of the transport path defined by the transport rollers 61. In this embodiment, the separation device 70 is provided near the outlet of the replacement chamber 50.

[0068] <Lifting device 71> The lifting device 71 is a device that lifts and lowers the separating member 72. A cylinder device or the like can be used as the lifting device 71. An lifting shaft 71a extends upward from the lifting device 71. The separating member 72 is connected to the upper end of the lifting shaft 71a.

[0069] <Separating member 72> The separating member 72 is configured to protrude from between predetermined adjacent conveying rollers 61A among the plurality of conveying rollers 61. The separating member 72 is formed in a substantially L-shape. The separating member 72 is connected to the lifting shaft 71a and has a portion along the conveying direction and a portion extending upward. The portion extending upward is located below the conveying rollers 61 before being driven by the lifting device 71. When the separating member 72 is driven by the lifting device 71, it protrudes above the conveying rollers 61.

[0070] FIG. 5 is a front view of the separating member 72. In FIG. 5, the separating member 72 is shown as seen from the front. In FIG. 5, the transported object A stopped by the separating member 72 is indicated by an imaginary two-dot chain line. As shown in FIG. 5, the separating member 72 extends along the conveying roller 61. The separating member 72 has a plurality of protrusions 73. The plurality of protrusions 73 are provided on the upper end of the separating member 72. The plurality of protrusions 73 are aligned in the left-right direction. The upper ends of the plurality of protrusions 73 are pointed. The protrusions 73 are generally wedge-shaped. The material of the separating member 72 is not particularly limited and may be appropriately selected depending on the material of the setter A, the type of workpiece, the heat treatment conditions, etc. The separating member 72 may be made of metal or ceramic. The portion of the separating member 72 that comes into contact with the transported object A (in this embodiment, the plurality of protrusions 73) may be made of metal from the standpoint of durability and heat resistance. Here, the separation member 72 including the plurality of protrusions 73 is made of stainless steel (or stainless steel alloy), which reduces wear of the protrusions 73 and makes it easier for the protrusions 73 to maintain their shape.

[0071] As shown in FIG. 3 , the separation device 70 includes passage sensors 74, 75 and a control device (control device 100 in this embodiment). The passage sensors 74, 75 detect the transported object A at predetermined detection positions B3, B4 on the transport path. Although not particularly limited, optical sensors or the like can be used as the passage sensors 74, 75. The passage sensor 74 is provided between the replacement chamber 50 and the stopper 80. In other words, the passage sensor 74 is provided downstream of the separating member 72 in the transport direction. The passage sensor 75 is provided between the replacement chamber 50 and the separating member 72. In other words, the passage sensor 75 is provided upstream of the separating member 72 in the transport direction. The locations at which the passage sensors 74, 75 are provided are not particularly limited.

[0072] The control device 100 is communicatively connected to the lifting device 71 and is configured to control the elevation of the separating member 72. In this embodiment, the control device 100 controls the elevation of the separating member 72 based on the time at which the passage sensors 74, 75 detect the transported object A. The passage sensors 74, 75 detect the transported object A. The control device 100 measures the time at which the passage sensors 74, 75 detect the transported object A. Because the conveying speed and dimensions of the transported object A are predetermined, the passage time for one transported object A to pass is also determined in advance. The control device 100 pre-records the calculated passage time for one transported object A to pass. If the time at which the passage sensors 74, 75 detect the transported object A is approximately the above-mentioned passage time, it is determined that the transported object A is not connected, and the separating member 72 is not driven.

[0073] FIG. 6 is a schematic diagram showing how the conveyed object A is separated by the separating device 70. As shown in FIG. 6, two conveyed objects A1 and A2 are conveyed in a continuous line. The front part of the rear conveyed object A2 overlaps with the rear part of the leading conveyed object A1. Because multiple (two in this embodiment) conveyed objects A1 and A2 are conveyed in a continuous line, the passage sensors 74 and 75 detect the rear conveyed object A2 even after detecting the leading conveyed object A1. Therefore, the passage sensors 74 and 75 detect the conveyed object A for a longer period of time than the passage time for one conveyed object A to pass. The control device 100 raises the separating member 72 when the passage sensors 74 and 75 continuously detect the conveyed object A for a predetermined passage time or longer. The control device 100 may raise the separating member 72 when at least one of the passage sensors 74, 75 continuously detects the transported object A for a predetermined passage time or longer.

[0074] The separating member 72 protrudes from between the adjacent conveying rollers 61A and contacts the underside of the rear conveyed object A2 of the two conveyed objects A. The front part of the rear conveyed object A2 is lifted from the conveying rollers 61A. The rear conveyed object A2 is lifted from the leading conveyed object A1. This causes the rear conveyed object A2 to stop. The rear conveyed object A2 and the leading conveyed object A1 are separated. The leading conveyed object A1 can be conveyed forward.

[0075] Furthermore, even when the leading transported object A1 overlaps the trailing transported object A2, the leading transported object A1 may tilt and slide off the trailing transported object A2 when the trailing transported object A2 is lifted. This separates the trailing transported object A2 from the leading transported object A1, allowing the leading transported object A1 to be transported forward.

[0076] In the above-described embodiment, the roller-type conveying device 60 includes a plurality of conveying rollers 61 and a separating device 70. The separating device 70 includes a separating member 72 that protrudes from between predetermined adjacent conveying rollers 61A among the plurality of conveying rollers 61. When a plurality of conveyed objects A1, A2 are conveyed by the plurality of conveying rollers 61 in a line in the conveying direction, the separating device 70 separates the conveyed objects A1, A2. The separating member 72 protrudes from between adjacent conveying rollers 61A. The separating device 70 holds the rear conveyed object A2 among the plurality of conveyed objects A1, A2 and separates the leading conveyed object A1. This allows only the leading conveyed object A to be conveyed upstream of the roller-type conveying device 60. As a result, conveyance problems in the roller-type conveying device 60 can be reduced. Furthermore, the separating device 70 can separate the conveyed objects A1 and A2 even when the plurality of conveying rollers 61 are still rotating. Therefore, the conveying conditions for the conveyed object A can be kept constant, except for the conveyed object A2 that is separated.

[0077] In the above-described embodiment, when separating the rearward conveyed object A2 from the leading conveyed object A1, the separating member 72 is brought into contact with the underside of the rearward conveyed object A2. This allows the leading conveyed object A1 to be separated while stopping only the rearward conveyed object A2 without stopping the conveyance rollers 61.

[0078] Furthermore, when multiple transported objects A1, A2 are transported overlapping one another, one of the transported objects A1, A2 may be transported at an angle relative to the transport direction. For example, if an attempt is made to hold an object transported at an angle relative to the transport direction from the side, the object may not be held properly. In this case, there is a concern that the object may not be held properly and may fall or interfere with other transported objects. The above-mentioned separating device 70 can separate the multiple transported objects A1, A2 by abutting the separating member 72 against the transported object (in this embodiment, transported object A2) from below. This makes it less likely that problems due to poor holding will occur.

[0079] In the above-described embodiment, the separating member 72 extends along the conveying roller 61. The separating member 72 has multiple protrusions 73 at a position where it contacts the conveyed object A (in this embodiment, at the upper end of the separating member 72). The multiple protrusions 73 increase the resistance between the conveyed object A2 and the contacting portion, making it easier to stop the conveyed object A2. As a result, the conveyed object A1 and the conveyed object A2 are easily separated. Furthermore, the pointed upper end of each of the multiple protrusions 73 makes it easier to stop the conveyed object A2. Furthermore, the multiple protrusions 73 provided on the separating member 72 at a position where it contacts the conveyed object A reduce the contact area between the conveyed object A and the separating member 72. Therefore, heat from the conveyed object A is less likely to be transmitted to the separating member 72, making it less likely that the separating device 70 will malfunction due to heat.

[0080] In the above-described embodiment, the separating device 70 includes passage sensors 74, 75 and a control device 100. The passage sensors 74, 75 detect the transported object A at a predetermined detection position B3. The control device 100 controls the elevation of the separating member 72. The control device 100 is configured to execute a process of raising the separating member 72 when the passage sensors 74, 75 continuously detect the transported object A for a predetermined period of time or more. This makes it possible to detect that the transported objects A1, A2 are connected in a non-contact manner. This makes it possible to detect the connected transported objects A without affecting the transport of the transported object A.

[0081] In the above-described embodiment, the passage sensor 74 is provided downstream in the conveying direction from the separating member 72. Therefore, there is no need to provide a separate area on the conveying path to detect whether the conveyed objects A1 and A2 are connected in a row. As a result, the conveying path can be shortened, and the equipment can be made more compact.

[0082] In the above-described embodiment, the separating device 70 separates the connected conveyed objects A1 and A2 to prevent problems when the conveyed object A is stopped by the stopper 80 and lifted by the lifter 90. However, the separating device 70 can also eliminate other conveying problems that can occur in roller-type conveying devices with other configurations. The separating device 70 can also be used, for example, in roller-type conveying devices that send the conveyed objects A one by one or in a set number to a room separated by a shutter (a heating chamber, a replacement chamber, etc.). When the conveyed objects are connected in a row, the shutter and the conveyed objects may interfere with each other when the shutter closes. By using the separating device to separate the connected conveyed objects, problems such as interference between the conveyed objects and the shutter are less likely to occur.

[0083] In the above-described embodiment, the roller-type conveying device 60 is used in the heating device 1, but the present invention is not limited to this. The roller-type conveying device 60 may also be applied to the roller-type conveying device 20 located upstream of the heating chamber 40.

[0084] Although the present invention has been described in detail above using specific embodiments, these are merely examples and do not limit the scope of the claims. Thus, the technology described in the claims includes various modifications and alterations of the above-described embodiments.

[0085] This specification includes the following items 1 to 6. The following items 1 to 6 are not limited to the above-described embodiment.

[0086] Section 1: a plurality of conveying rollers arranged along a predetermined conveying direction; a separating device including a separating member protruding from between predetermined adjacent conveying rollers among the plurality of conveying rollers; Equipped with The separating device is configured to, when a plurality of conveyed objects are conveyed by the plurality of conveying rollers in a state of being connected in the conveying direction, cause the separating member to protrude from between the adjacent conveying rollers to hold a rear conveyed object among the plurality of conveyed objects and separate a leading conveyed object. Roller type conveying device.

[0087] Section 2: Item 2. The roller-type conveying device according to item 1, wherein the separating member is brought into contact with the underside of the rear conveyed object when separating the rear conveyed object from the leading conveyed object.

[0088] Section 3: Item 3. A roller-type conveying device according to item 2, wherein the separating member extends along the conveying roller and has a plurality of protrusions at positions where it comes into contact with the conveyed object.

[0089] Section 4: Item 4. A roller-type conveying device according to item 3, wherein the upper end of each of the plurality of protrusions is pointed.

[0090] Section 5: The detaching device is a passage sensor that detects the transported object at a predetermined detection position; a control device that controls the elevation of the separating member; Furthermore, The roller-type conveying device according to any one of items 1 to 4, wherein the control device is configured to execute a process of lifting the separating member when the passing sensor continuously detects the conveyed object for a predetermined period of time or more.

[0091] Item 6: Item 6. The roller type conveying device according to item 5, wherein the passage sensor is provided downstream of the separating member in the conveying direction. [Explanation of symbols]

[0092] A Conveyed object (setter) A1,A2 Object to be transported B1 Stop position B2 Misalignment detection position B3, B4 detection position 1 Heating device 10,15 Conveyor path 16 Container 17 Support part 18 Actuators 20. Conveyor 21 Conveyor roller 30,50 Replacement room 40 Heating chamber 41 Conveyor roller 42 Furnace body 43 Transport space 60 Roller type conveyor 61,61A Conveyor roller 61a axis 61b Roller body 62 Drive unit 63 Support plate 64 sprocket 65 Chain 67 Stop sensor 68 Detection Sensor 70 Decoupling device 71 Lifting device 71a Elevating shaft 72 Separation member 73 Protrusion 74,75 Passage sensor 80 Stopper 81 Stopper part 82 Base 82a Flange 82b Through hole 82c end 83 axis (rotating axis) 84 Stopper mechanism 85 Support plate 85a,85b plate part 85b1 Through hole 86 axes 86a head 86b Nut 86c ring 87 biasing member 87a Coil spring 88 Regulatory member 90 Lifter 91 Lifting device 91a Cylinder section 91b Elevating shaft 92 Arm member 92a~92d Arm 92c1 front 92e Reinforcement plate 92f base 92f1 end 95 Fork 96 First Actuator 97 Second Actuator 100 control device

Claims

1. a plurality of conveying rollers arranged along a predetermined conveying direction; a separating device including a separating member protruding from between predetermined adjacent conveying rollers among the plurality of conveying rollers; Equipped with The separating device is configured to, when a plurality of conveyed objects are conveyed by the plurality of conveying rollers in a state of being connected in the conveying direction, cause the separating member to protrude from between the adjacent conveying rollers to hold a rear conveyed object among the plurality of conveyed objects and separate a leading conveyed object. Roller type conveying device.

2. 2. The roller-type conveying device according to claim 1, wherein the separating member is brought into contact with a lower surface of the rear conveyed object when separating the rear conveyed object from the leading conveyed object.

3. 3. The roller-type conveying device according to claim 2, wherein the separating member extends along the conveying roller and has a plurality of protrusions at positions where the separating member comes into contact with the conveyed object.

4. 4. The roller-type conveying device according to claim 3, wherein the upper end of each of the plurality of protrusions is sharp.

5. The detaching device is a passage sensor that detects the transported object at a predetermined detection position; a control device that controls the elevation of the separating member; Furthermore, The roller-type conveying device according to any one of claims 1 to 4, wherein the control device is configured to execute a process of lifting the separating member when the passing sensor detects the conveyed object continuously for a predetermined period of time or more.

6. 6. The roller-type conveying device according to claim 5, wherein the passage sensor is provided downstream of the separating member in the conveying direction.

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