Sagger holding device

Abstract

To provide technology capable of holding a sagger by a sagger holding device with stability.SOLUTION: A sagger holding device holds a sagger capable of accommodating objects to be heat-treated in a hear treatment furnace. The sagger is provided with at least a corner part in a top view from above. The sagger holding device is provided with a corner holding part holding the corner part of the sagger. The corner holding part may hold the corner part from an inner side of the sagger, or may hold the corner part from an outer side of the sagger.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a sagger gripping device. [Background technology]

[0002] Patent Document 1 discloses a sagger gripping device, which includes a gripping portion that grips the side wall of a sagger. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6949260 Summary of the Invention [Problem to be solved by the invention]

[0004] When a sagger is repeatedly used in a firing furnace, the side walls of the sagger may become deformed due to the heat from the firing furnace. For this reason, in a configuration in which the gripping part grips the side walls of the sagger, the gripping part cannot stably grip the side walls of the sagger.

[0005] This specification discloses a technique that allows a sagger to be stably held by a sagger holding device. [Means for solving the problem]

[0006] In a first aspect of the technology disclosed in this specification, a sagger gripping device grips a sagger capable of accommodating an object to be heat-treated in a heat treatment furnace. The sagger has at least one corner when viewed from above. The sagger gripping device has a corner gripper that grips the corner of the sagger.

[0007] According to the above configuration, at least one corner of the sagger is less likely to deform due to heat from the heat treatment furnace than the side wall of the sagger, and therefore the corner gripping portion can grip the sagger more stably than in a configuration in which the side wall of the sagger is gripped. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of a heat treatment system according to a first embodiment. [Figure 2] FIG. 2 is a top view of the sagger and sagger gripping device of the first embodiment when the inner corner gripping portions are in a separated state. [Figure 3] FIG. 2 is a top view of the sagger and sagger gripping device of the first embodiment when the inner corner gripping portions are in contact with each other. [Figure 4] FIG. 2 is an enlarged top view of the sagger and sagger gripping device of the first embodiment when the inner corner gripping portions are in a separated state. [Figure 5] FIG. 2 is an enlarged top view of the sagger and sagger gripping device of the first embodiment when the inner corner gripping portions are in contact with each other. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 2 is a top view of four operating devices of the first embodiment. [Figure 8] FIG. 10 is a top view of the sagger and sagger gripping device of the second embodiment when the outer corner gripping portions are in a separated state. [Figure 9] FIG. 10 is a top view of the sagger and sagger gripping device of the second embodiment when the outer corner gripping portions are in contact with each other. [Figure 10] FIG. 10 is a top view of the sagger and sagger gripping device of the third embodiment, with the inner corner gripping portion and the outer corner gripping portion in contact with each other. DETAILED DESCRIPTION OF THE INVENTION

[0009] The main features of the embodiments described below are listed below. Note that the technical elements described below are independent technical elements that exhibit technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing.

[0010] In a second aspect of the technology disclosed in this specification, the sagger in the first aspect described above has a first corner and a second corner diagonally disposed relative to the first corner when viewed from above. The sagger gripping device has a first corner gripping portion that grips the first corner and a second corner gripping portion that grips the second corner. According to the above configuration, the sagger can be gripped more stably by gripping the first and second corners that are diagonally disposed.

[0011] In a third aspect of the technology disclosed in this specification, in the second aspect described above, when the sagger gripping device grips the sagger, the first corner gripping portion is pressed against the first corner, and the second corner gripping portion is pressed against the second corner. With the above configuration, the mechanism for gripping the sagger can be simplified.

[0012] In a fourth aspect of the technology disclosed in this specification, in any one of the first to third aspects, the sagger has a plurality of corners when viewed from above. The sagger holding device has a plurality of corner holding portions that hold each of the plurality of corners of the sagger. The number of the plurality of corner holding portions is the same as the number of the plurality of corners of the sagger. With the above configuration, all of the plurality of corners of the sagger are held. This allows the sagger to be held more stably.

[0013] In a fifth aspect of the technology disclosed in this specification, in any one of the first to fourth aspects, the corner gripping portion grips the corner from inside the sagger. With the above configuration, the sagger gripping device can grip the saggers even when multiple saggers are arranged closely together.

[0014] In a sixth aspect of the technology disclosed in the present specification, in any one of the first to fifth aspects, the corner gripping portion grips the corner from outside the sagger. According to the above configuration, the sagger can be gripped by the sagger gripping device even when the workpiece is contained in the sagger.

[0015] In a seventh aspect of the technology disclosed herein, in any one of the first to sixth aspects, the sagger has a corner defined by a first side wall and a second side wall. The corner gripper has a first abutment member that abuts against the first side wall when the corner gripper grips the corner, and a second abutment member that abuts against the second side wall when the corner gripper grips the corner. According to the above configuration, the sagger can be gripped with a simple configuration of the corner gripper.

[0016] In an eighth aspect of the technology disclosed in this specification, in the seventh aspect described above, the corner gripping portion further includes a base member fixed to the first contact member and the second contact member. The rigidity of the base member is greater than the rigidity of the first contact member and the rigidity of the second contact member. With the above configuration, the first contact member can be closely attached to the first side wall, and the second contact member can be closely attached to the second side wall. Furthermore, it is possible to easily fix the first contact member and the second contact member to the base member.

[0017] A ninth aspect of the technique disclosed in this specification is the seventh or eighth aspect, wherein the first contact member and the second contact member are made of a resin material, ceramics, or a metal material.

[0018] In a tenth aspect of the technology disclosed in this specification, in the eighth aspect, the sagger gripping device further includes an operating device that moves the base member in a pressing direction that presses the base member against the corner of the sagger and in a moving direction that moves the base member away from the corner of the sagger. According to the above configuration, the use of the operating device makes it easier to adjust the position of the base member relative to the corner.

[0019] In an eleventh aspect of the technology disclosed in this specification, in the tenth aspect, the operating device includes a first rod and a second rod that move the base member. The vertical position of the first rod is different from the vertical position of the second rod. With this configuration, when two operating devices are adjacent to each other, interference between the first rod of one operating device and the second rod of the other operating device can be suppressed.

[0020] (First Example) As shown in FIG. 1, the sagger gripping device 10 is used in a heat treatment system 100. The heat treatment system 100 includes a heat treatment furnace 102, a return line 104, a recovery device 106, and a supply device 108. The heat treatment furnace 102 heat-treats the workpieces in the saggers 2 while the saggers 2 are transported from an inlet 102a to an outlet 102b of the heat treatment furnace 102. The return line 104 transports the saggers 2 discharged from the outlet 102b to the inlet 102a. The recovery device 106 and the supply device 108 are disposed on the return line 104. The recovery device 106 recovers the workpieces from the saggers 2 after the heat treatment. The supply device 108 supplies the workpieces to the saggers 2 before the heat treatment. The sagger gripping device 10 removes abnormal saggers 2, for example, deformed saggers 2 or broken saggers 2, from the return line 104 and sends new saggers 2 to the return line 104.

[0021] The sagger 2 shown in FIG. 2 is capable of containing a workpiece. In FIGS. 2 to 10, the sagger 2 is dot-hatched to facilitate understanding of its position. The workpiece may be, for example, a powder such as a raw material for a ceramic capacitor or a positive or negative electrode material for a lithium-ion battery. The sagger 2 has an opening 2a at its upper end. The sagger 2 has a substantially rectangular box shape. The sagger 2 has multiple (four in this embodiment) side walls 4. Hereinafter, the four side walls 4 may be referred to as side walls 4a, 4b, 4c, and 4d. The side walls 4a and 4c face each other, and the side walls 4b and 4d face each other. When viewed from above, the sagger 2 has at least one corner 6; in this embodiment, it has multiple (four) corners 6. Hereinafter, the four corners 6 may be referred to as corners 6a, 6b, 6c, and 6d. Corner 6 is defined by two adjacent side walls 4. Corner 6 refers to the connection point of two side walls 4 and its vicinity. In this embodiment, corner 6a is defined by side walls 4a and 4b, corner 6b is defined by side walls 4b and 4c, corner 6c is defined by side walls 4c and 4d, and corner 6d is defined by side walls 4d and 4a. Corner 6a is located diagonally from corner 6c, and corner 6b is located diagonally from corner 6d.

[0022] The sagger gripping device 10 is provided, for example, at the tip of a robot arm of an articulated robot. The sagger gripping device 10 is configured to grip the sagger 2. The sagger gripping device 10 operates based on the detection result of the position of the sagger 2 by a sagger detection sensor (not shown).

[0023] The sagger gripping device 10 includes at least one inside corner gripping portion 12, a frame 14 (see FIGS. 4-6), and at least one operating device 16 (see FIGS. 4 to 7). In this embodiment, the sagger gripping device 10 includes a plurality (four) of inside corner gripping portions 12 and a plurality (four) of operating devices 16. Note that the frame 14 and operating device 16 are not shown in FIGS. 2 and 3 to make the drawings easier to understand.

[0024] When the sagger gripping device 10 grips the sagger 2, the inner corner gripping portions 12 are disposed inside the sagger 2. The number of the inner corner gripping portions 12 is the same as the number of the corners 6 of the sagger 2. Each of the inner corner gripping portions 12 grips a corresponding corner 6 of the sagger 2. Hereinafter, the inner corner gripping portion 12 corresponding to corner 6a may be referred to as inner corner gripping portion 12a, the inner corner gripping portion 12 corresponding to corner 6b may be referred to as inner corner gripping portion 12b, the inner corner gripping portion 12 corresponding to corner 6c may be referred to as inner corner gripping portion 12c, and the inner corner gripping portion 12 corresponding to corner 6d may be referred to as inner corner gripping portion 12d.

[0025] The inner corner gripping portions 12 are switched between a separated state and an abutting state (see FIG. 3 ) by the operation of the operating device 16, which will be described later. In this embodiment, the four inner corner gripping portions 12 are simultaneously switched between the separated state and the abutting state. When the inner corner gripping portions 12 are in the separated state, they are away from the corner 6 and do not grip the corner 6. In other words, all four inner corner gripping portions 12 are simultaneously in the separated state, and the sagger gripping device 10 does not grip the sagger 2.

[0026] As shown in Fig. 3, when the inner corner gripping portions 12 are in contact with the corners 6 from inside the sagger 2, they are pressed against the corners 6 from inside the sagger 2. The inner corner gripping portions 12a and 12c arranged diagonally are pressed against the corners 6a and 6c, respectively, in directions away from each other, and the inner corner gripping portions 12b and 12d arranged diagonally are pressed against the corners 6b and 6d, respectively, in directions away from each other. As a result, each of the multiple inner corner gripping portions 12 grips the corresponding corner 6 of the sagger 2. As a result, the sagger gripping device 10 grips the sagger 2 from inside. With the sagger gripping device 10 gripping the sagger 2, a robot arm (not shown) operates to remove the sagger 2 from or send it to the return line 104 (see FIG. 1).

[0027] In this embodiment, the four inner corner gripping portions 12 have the same configuration. As shown in Figure 4, each inner corner gripping portion 12 includes a base member 18, at least one first abutment member 20, and at least one second abutment member 22. In this embodiment, each inner corner gripping portion 12 includes two first abutment members 20 and two second abutment members 22.

[0028] The base member 18 is made of, for example, a resin material, ceramics, or metal material. The base member 18 has a first opposing surface 24 and a second opposing surface 26. When the inner corner gripping portion 12 is disposed inside the sagger 2, the first opposing surface 24 faces the inner surface of one of the two adjacent side walls 4 and is disposed along this inner surface, and the second opposing surface 26 faces the inner surface of the other of the two adjacent side walls 4 and is disposed along this inner surface. Hereinafter, the inner surface of one of the two adjacent side walls 4 may be referred to as the first inner surface 28, and the inner surface of the other of the two adjacent side walls 4 may be referred to as the second inner surface 30.

[0029] The two first abutment members 20 are fixed to the first opposing surfaces 24 of the base member 18. The first abutment members 20 are made of, for example, a resin material, ceramics, or metal material. The rigidity of the base member 18 is greater than the rigidity of the first abutment members 20. This prevents the base member 18 from deforming when the first abutment members 20 are pressed against the first inner surface 28 of the sagger 2, making it easier to maintain the first opposing surfaces 24 and the first inner surface 28 parallel to each other. When the sagger 2 and the sagger gripping device 10 are viewed from above with the inner corner grippers 12 disposed inside the sagger 2, the two first abutment members 20 are aligned along the first inner surface 28. When the inner corner grippers 12 are in the separated state, the first abutment members 20 are separated from the first inner surface 28. 5, when the inner corner gripping portion 12 is in the abutting state, the first abutment member 20 abuts against the first inner surface 28 and is pressed against the first inner surface 28. The first abutment member 20 is sandwiched between the first opposing surface 24 and the first inner surface 28. The first abutment member 20 is in close contact with the first inner surface 28.

[0030] As shown in FIG. 4 , two second abutment members 22 are fixed to the second opposing surfaces 26 of the base member 18. The second abutment members 22 are made of, for example, a resin material, ceramics, or metal material. The material of the second abutment members 22 is, for example, the same as the material of the first abutment members 20. The rigidity of the base member 18 is, for example, greater than the rigidity of the second abutment members 22. This suppresses deformation of the base member 18 and makes it easier to maintain the second opposing surfaces 26 and the second inner surface 30 parallel to each other. By maintaining the two opposing surfaces 24, 26 and the two inner surfaces 28, 30 parallel to each other, the corner 6 of the sagger 2 can be suitably gripped by the inner corner gripping portion 12. The rigidity of the second abutment members 22 is, for example, approximately the same as the rigidity of the first abutment members 20. When the sasket 2 and the sasket gripping device 10 are viewed from above with the inner corner gripping portions 12 disposed inside the sasket 2, the two second abutment members 22 are aligned along the second inner surface 30. When the inner corner gripping portions 12 are in the separated state, the second abutment members 22 are separated from the second inner surface 30. As shown in FIG. 5 , when the inner corner gripping portions 12 are in the abutting state, the second abutment members 22 are in abutment with and pressed against the second inner surface 30. The second abutment members 22 are sandwiched between the second opposing surface 26 and the second inner surface 30. The second abutment members 22 are in close contact with the second inner surface 30.

[0031] The frame 14 is made of, for example, a resin material, ceramics, or metal material. The frame 14 has at least one support portion 34 (four in this embodiment) and at least one connection portion 36 (four in this embodiment). The number of the support portions 34 is the same as the number of the inner corner gripping portions 12. The support portion 34 faces the base member 18. The connection portion 36 connects two adjacent support portions 34.

[0032] The operating devices 16 are disposed on each of the support portions 34. The number of the operating devices 16 is the same as the number of the inner corner gripping portions 12. Each of the operating devices 16 operates a corresponding inner corner gripping portion 12.

[0033] In this embodiment, the four operating devices 16 have the same configuration. Each operating device 16 includes an actuator 40, a rod fixing member 42, a first rod 44, a first guide member 46, a second rod 48, and a second guide member 50.

[0034] The actuator 40 is supported by the support portion 34. The actuator 40 is disposed on the opposite side of the support portion 34 from the inner corner grip portion 12. The actuator 40 includes a cylinder 54 and a cylinder rod 56. The cylinder rod 56 moves forward and backward relative to the cylinder 54 in a pressing direction D1 or a separating direction D2. The pressing direction D1 is opposite to the separating direction D2.

[0035] The rod fixing member 42 has a long, thin plate shape. A central portion 42a of the rod fixing member 42 in the longitudinal direction is fixed to the tip of the cylinder rod 56. As shown in FIG. 6, the rod fixing member 42 is inclined with respect to the support portion 34 so that the vertical position of one longitudinal end of the rod fixing member 42 is located lower than the vertical position of the other longitudinal end of the rod fixing member 42. As shown in FIG. 7, in two adjacent operating devices 16, the other longitudinal end of one rod fixing member 42 is located above one longitudinal end of the other rod fixing member 42. This makes it possible to prevent interference between the two rod fixing members 42 in the two adjacent operating devices 16.

[0036] As shown in FIG. 5, the first rod 44 has a long, thin rod-like shape. One end of the first rod 44 is fixed to the first portion 42b of the rod fixing member 42. The first portion 42b is disposed closer to one end of the rod fixing member 42 than the central portion 42a. The first rod 44 penetrates the first guide member 46 and the support portion 34. When the cylinder rod 56 moves, the first rod 44 is guided by the first guide member 46 and moves in the pressing direction D1 or the separating direction D2. The other end of the first rod 44 is fixed to the base member 18. As shown in FIG. 6, the first rod 44 is disposed below the cylinder rod 56.

[0037] As shown in FIG. 5, the second rod 48 has a long, thin rod-like shape. One end of the second rod 48 is fixed to the second portion 42c of the rod fixing member 42. The second portion 42c is located closer to the other end of the rod fixing member 42 than the central portion 42a. The second rod 48 penetrates the second guide member 50 and the support portion 34. When the cylinder rod 56 moves, the second rod 48 is guided by the second guide member 50 and moves in the pressing direction D1 or the separating direction D2. The other end of the second rod 48 is fixed to the base member 18. As shown in FIG. 6, the second rod 48 is located above the first rod 44 and the cylinder rod 56. That is, the vertical position of the second rod 48 is different from the vertical positions of the first rod 44 and the cylinder rod 56. Although not shown, in two adjacent operating devices 16, the second rod 48 fixed to one rod fixing member 42 is positioned above the first rod 44 fixed to the other rod fixing member 42. This makes it possible to prevent the second rod 48 fixed to one rod fixing member 42 of the two adjacent operating devices 16 from interfering with the first rod 44 fixed to the other rod fixing member 42.

[0038] The process by which the sagger gripping device 10 grips the sagger 2 will now be described. As shown in FIG. 4, first, the four inner corner gripping parts 12 are positioned inside the sagger 2. Next, as shown in FIG. 5, the cylinder rod 56 moves in the pressing direction D1. The rod fixing member 42, the first rod 44, and the second rod 48 simultaneously move in the pressing direction D1, causing the inner corner gripping parts 12 to move in the pressing direction D1. As a result, the inner corner gripping parts 12 approach the corner 6, and then the two first abutment members 20 are pressed against the first inner surface 28, and the two second abutment members 22 are pressed against the second inner surface 30. In other words, the inner corner gripping parts 12 switch from a separated state to a contact state. In this embodiment, the cylinder rods 56 of the four operating devices 16 move simultaneously in the pressing direction D1, so that the four inner corner gripping portions 12 simultaneously switch from a separated state to a contact state, as shown in Fig. 3. This causes the four corners 6 of the sagger 2 to be gripped from the inside by the sagger gripping device 10. This allows the sagger 2 to be gripped more stably than in a configuration in which the side wall 4 of the sagger 2 is gripped. Furthermore, the sagger gripping device 10 can grip the sagger 2 even when multiple saggers 2 are arranged closely together.

[0039] When the sagger gripping device 10 releases the grip of the sagger 2, the cylinder rods 56 of the four operating devices 16 simultaneously move in the separating direction D2. This causes the four inner corner gripping parts 12 to simultaneously switch from the abutting state to the separating state. As shown in Figure 2, the inner corner gripping parts 12 move away from the corner 6, causing the sagger gripping device 10 to release the grip of the sagger 2.

[0040] (effect) In the first embodiment described above, the inner corner gripping portions 12 grip the corners 6 of the sagger 2. The corners 6 are less susceptible to deformation by the heat from the heat treatment furnace 102 than the side walls 4. Therefore, the inner corner gripping portions 12 can grip the sagger 2 more stably than in a configuration in which the side walls 4 are gripped.

[0041] (Correspondence) The inner corner gripping portion 12 is an example of a "corner gripping portion." The inner corner gripping portion 12a is an example of a "first corner gripping portion." The inner corner gripping portion 12c is an example of a "second corner gripping portion." The corner 6a is an example of a "first corner portion." The corner 6c is an example of a "second corner portion." The side wall 4a is an example of a "first side wall." The side wall 4b is an example of a "second side wall."

[0042] (Second Example) In the second embodiment, only the differences from the first embodiment will be described. As shown in Fig. 8, the sagger gripping device 10 has at least one outer corner gripping portion 200 instead of the inner corner gripping portion 12 of the first embodiment. In this embodiment, the sagger gripping device 10 has a plurality (four) of outer corner gripping portions 200. Note that in Figs. 8 and 9, the frame 14 and at least one operating device 16 are not shown to make the drawings easier to understand.

[0043] When the sagger gripping device 10 grips the sagger 2, the outer corner gripping portions 200 are disposed outside the sagger 2. The number of the outer corner gripping portions 200 is the same as the number of the corners 6 of the sagger 2. Each of the outer corner gripping portions 200 grips a corresponding corner 6 of the sagger 2.

[0044] The outer corner gripping portion 200 includes a base member 202, at least one (two in this embodiment) first abutment member 20, and at least one (two in this embodiment) second abutment member 22. The base member 202 includes a first opposing surface 204 and a second opposing surface 206. When the outer corner gripping portion 200 is disposed outside the sagger 2, the first opposing surface 204 faces the outer surface of one of the two adjacent side walls 4 (hereinafter referred to as the first outer surface 210), and the second opposing surface 206 faces the outer surface of the other of the two adjacent side walls 4 (hereinafter referred to as the second outer surface 212).

[0045] The first contact member 20 is fixed to the first opposing surface 204. The second contact member 22 is fixed to the second opposing surface 206.

[0046] The outer corner gripping portions 200 can be switched between a separated state and an abutting state (see FIG. 9 ) by the operation of the operating device 16. In this embodiment, the four outer corner gripping portions 200 can be simultaneously switched between the separated state and the abutting state. When the outer corner gripping portions 200 are in the separated state, they are separated from the corner 6. Therefore, the sagger gripping device 10 does not grip the corner 6 of the sagger 2. As shown in FIG. 9 , when the outer corner gripping portions 200 are in the abutting state, the two first abutting members 20 are pressed against the first outer surface 210 from the outside of the sagger 2, and the two second abutting members 22 are pressed against the second outer surface 212 from the outside of the sagger 2. Therefore, the sagger gripping device 10 grips the corner 6 of the sagger 2 from the outside of the sagger 2. This allows the sack 2 to be gripped by the sack gripping device 10 even when the material to be treated is contained in the sack 2.

[0047] (Correspondence) The outer corner gripping portion 200 is an example of a "corner gripping portion." The outer corner gripping portion 200 that grips the corner 6a is an example of a "first corner gripping portion." The outer corner gripping portion 200 that grips the corner 6c is an example of a "second corner gripping portion."

[0048] (Third Example) The third embodiment is a combination of the first and second embodiments. That is, as shown in Fig. 10, the sagger gripping device 10 includes at least one inner corner gripping portion 12 and at least one outer corner gripping portion 200. The sagger gripping device 10 grips the corner 6 from the inside of the sagger 2 with the inner corner gripping portion 12, and grips the corner 6 from the outside of the sagger 2 with the outer corner gripping portion 200.

[0049] (Variation) In one embodiment, the sagger gripping device 10 may grip only some of the multiple corners 6. In this configuration, the number of the at least one inner corner gripping portion 12 and the number of the at least one outer corner gripping portion 200 may each be less than the number of the at least one corner 6. Also, the sagger gripping device 10 may grip only two corners 6 that are diagonally arranged.

[0050] In one embodiment, the sagger gripping device 10 may include only one actuation device 16. In this configuration, one actuation device 16 may actuate multiple inside corner grippers 12 or multiple outside corner grippers 200.

[0051] In one embodiment, each of the inner corner gripping portion 12 and the outer corner gripping portion 200 may not include at least one first abutment member 20 and at least one second abutment member 22. In this configuration, the base member 18, 202 may grip the corner 6.

[0052] In one embodiment, the cylinder rod 56 of the operating device 16 may be fixed directly to the base member 18 .

[0053] Although specific examples of the technology disclosed in this specification have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and variations of the specific examples exemplified above. Furthermore, the technical elements described in this specification or drawings exhibit technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Furthermore, the technology exemplified in this specification or drawings simultaneously achieves multiple objectives, and achieving one of those objectives itself has technical utility. [Explanation of symbols]

[0054] 2: Sack 4, 4a, 4b, 4c, 4d: Side wall 6, 6a, 6b, 6c, 6d: corner 10: Sagger gripping device 12, 12a, 12b, 12c, 12d: Inner corner grip 16: Operating device 18: Base material 20: First contact member 22: Second contact member 44: First rod 48: Second rod 102: Heat treatment furnace 102a: Loading entrance 102b: Export 200: Outer corner grip 202:ベースComponents D1: Direction of Payment D2: From the opposite direction

Claims

1. A sagger gripping device for gripping a sagger capable of accommodating an object to be heat-treated in a heat treatment furnace, The sagger has at least one corner when viewed from above, The sagger gripping device includes a corner gripping portion that grips the corner of the sagger.

2. The sagger has a first corner portion and a second corner portion disposed diagonally opposite the first corner portion when viewed from above, The sagger gripping device a first corner gripping portion that grips the first corner portion; The sagger gripping device according to claim 1 , further comprising: a second corner gripping portion that grips the second corner portion.

3. 3. The sagger gripping device according to claim 2, wherein when the sagger gripping device grips the sagger, the first corner gripping portion is pressed against the first corner portion, and the second corner gripping portion is pressed against the second corner portion.

4. The sagger has a plurality of corners when viewed from above, the sagger gripping device includes a plurality of corner gripping portions that grip the plurality of corner portions of the sagger, respectively; The sagger gripping device according to claim 1 , wherein the number of the plurality of corner gripping portions is the same as the number of the plurality of corners of the sagger.

5. The sagger gripping device according to claim 1 , wherein the corner gripping portion grips the corner portion from inside the sagger.

6. The sagger gripping device according to claim 1 , wherein the corner gripping portion grips the corner portion from the outside of the sagger.

7. the sagger includes a corner defined by a first sidewall and a second sidewall; The corner gripping portion is a first contact member that contacts the first side wall when the corner gripping portion grips the corner; The sagger gripping device according to claim 1 , further comprising: a second abutting member that abuts against the second side wall when the corner gripping portion grips the corner.

8. the corner gripping portion further includes a base member fixed to the first contact member and the second contact member, The sagger gripping device according to claim 7 , wherein the rigidity of the base member is greater than the rigidity of each of the first abutting member and the second abutting member.

9. 8. The sagger gripping device according to claim 7, wherein the first contact member and the second contact member are made of a resin material, a ceramic material, or a metal material.

10. The sagger gripping device according to claim 8, further comprising an operating device that moves the base member in a pressing direction that presses the base member against the corner of the sagger and in a moving direction that moves the base member away from the corner of the sagger.

11. the operating device includes a first rod and a second rod that move the base member; 11. The sagger gripping device of claim 10, wherein the vertical position of the first rod is different from the vertical position of the second rod.

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