Cart with locking device

Abstract

To provide a carriage with lock device which can be automatically fixed.SOLUTION: A carriage 1 with lock device comprises: a carriage 10; a limit switch 50 which stops the carriage 10 when the carriage 10 arrives at a prescribed position; an air cylinder 30; and a lock pin 40 which can reciprocate along the first direction by the air cylinder 30. When the lock pin 40 is inserted to a receiving seat 103, the position of the carriage 10 is fixed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The embodiment relates to a dolly with a locking device. [Background technology]

[0002] Conventionally, when manufacturing steel sheets, the thickness profile along the sheet width direction is measured to control the thickness with high precision. The thickness profile of a steel sheet is often measured using an X-ray thickness gauge mounted on a cart. When rolling a steel sheet, the cart is retracted to a position away from the rolling line. When measuring the thickness profile, the rolling line is stopped and the cart is moved to a position where the X-ray thickness gauge sandwiches the steel sheet in the thickness direction. Because the cart must be completely stopped during thickness measurement, a lock pin is provided on the cart and inserted into a receiving seat provided on the factory floor, etc. However, manually inserting and removing the lock pin by an operator is problematic in terms of time and effort. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-038503 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the embodiment is to provide a dolly with a locking device that can be automatically secured. [Means for solving the problem]

[0005] The locking device-equipped carriage according to the embodiment includes a carriage, a limit switch that stops the carriage when the carriage reaches a predetermined position, an air cylinder, and a lock pin that can be reciprocated along a first direction by the air cylinder. The position of the carriage is fixed by inserting the lock pin into a receiving seat.

[0006] The locking device-equipped carriage according to the embodiment includes a carriage, a limit switch that stops the carriage when it reaches a predetermined position, an air cylinder, and a pair of locking members that can be reciprocated by the air cylinder. The pair of locking members clamp the rail to fix the carriage in place. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing a dolly with a locking device according to a first embodiment. [Figure 2] FIG. 2 is a diagram showing an air cylinder according to the first embodiment. [Figure 3] 3(a) to (c) are views showing the lock pin and its surroundings in the first embodiment, where (a) is a top view, (b) is a side cross-sectional view, and (c) is a front view. [Figure 4] FIG. 4 is a diagram illustrating a relay switch according to the first embodiment. [Figure 5] 5(a) to 5(d) are diagrams showing the downward movement of the lock pin. [Figure 6] 6(a) and (b) are diagrams showing the operation of the lock pin moving upward. [Figure 7] FIG. 7 is a diagram showing a carriage with a locking device according to the second embodiment. [Figure 8] 8(a) and (b) are diagrams showing an air cylinder according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] First Embodiment First, the first embodiment will be described. FIG. 1 is a diagram showing a carriage with a locking device according to this embodiment. FIG. 2 is a diagram showing an air cylinder in this embodiment. 3(a) to (c) are views showing the lock pin and its surroundings in this embodiment, where (a) is a top view, (b) is a side cross-sectional view, and (c) is a front view. FIG. 4 is a diagram showing a relay switch according to this embodiment. Note that each figure is a schematic diagram, and has been appropriately emphasized and simplified, as well as other figures described below.

[0009] As shown in Fig. 1, a carriage 1 with a locking device according to this embodiment is used, for example, in a factory. A rolling line (not shown) for rolling a steel plate 200 is installed in the factory. The steel plate 200 is rolled while moving in a direction perpendicular to the plane of the paper in Fig. 1. The carriage 1 with a locking device is an apparatus for measuring the thickness profile of the steel plate 200 in the width direction.

[0010] Rails 102 are installed on a floor 101 of the factory, and the locking device-equipped cart 1 is placed on the rails 102. The rails 102 extend in the width direction of the steel plate 200. A receiving seat 103 is also provided on the floor 101. The receiving seat 103 is, for example, a cylindrical hole extending in the vertical direction. Furthermore, a switch unit 51 and an actuator 52 of a limit switch 50 are provided on the floor 101.

[0011] The locking device-equipped cart 1 is provided with a parent cart 10. The parent cart 10 has a driving means 15 and is capable of reciprocating along a rail 102. The driving means 15 is, for example, a motor. A striker 53 of a limit switch 50 is fixed to the side of the parent cart 10. The limit switch 50 is made up of a switch unit 51 and an actuator 52 fixed to the floor 101, and the striker 53 fixed to the parent cart 10. The limit switch 50 stops the parent cart 10 when it reaches a predetermined position on the rail 102.

[0012] A sub-carriage 11 is mounted on the main cart 10. A moving means 12 for moving the sub-carriage 11 is fixed to the main cart 10. The moving means 12 is, for example, a power cylinder. The sub-carriage 11 is movable in the width direction of the steel plate 200 relative to the main cart 10.

[0013] The child carriage 11 is equipped with an X-ray thickness gauge 13. The X-ray thickness gauge 13 measures the thickness of the steel plate 200 by irradiating the steel plate 200 with X-rays and detecting the X-rays that have passed through the steel plate 200.

[0014] The parent carriage 10 is also provided with a locking device 20. The locking device 20 is provided with an air cylinder 30 and a lock pin 40. The configuration of the locking device 20 will be described below.

[0015] 2, the air cylinder 30 is provided with a solenoid valve 31, a pipe 32 that supplies air to the solenoid valve 31, a housing 33, a rod 34 that is reciprocable relative to the housing 33, and pipes 35 and 36 that supply air from the solenoid valve 31 to the housing 33. The solenoid valve 31 switches between supplying the air supplied from the pipe 32 to the pipe 35, the pipe 36, or neither the pipe 35 nor the pipe 36.

[0016] The housing 33 is, for example, substantially cylindrical in shape. The top surface of the housing 33 is sealed, and a shaft portion 34b of a rod 34 is inserted into the bottom surface. The rod 34 is provided with a disk portion 34a arranged inside the housing 33, a shaft portion 34b connected to the disk portion 34a and connecting the inside and outside of the housing 33, and a block portion 34c connected to the shaft portion 34b and arranged outside the housing 33. The disk portion 34a is movable while airtightly dividing the inside of the housing 33.

[0017] When solenoid valve 31 supplies air to pipe 35, rod 34 moves in a direction protruding from housing 33 due to the difference in air pressure. When solenoid valve 31 supplies air to pipe 36, rod 34 moves in a direction retracting into housing 33 due to the difference in air pressure. In this embodiment, the movement direction of rod 34 is set to the up and down direction.

[0018] As shown in FIGS. 3(a) to 3(c), the lock pin 40 has a generally cylindrical shape extending in the vertical direction, and the tip of the lock pin 40 has a tapered portion 41. The tapered portion 41 has a shape that continuously becomes thinner as it approaches the tip. A cylindrical recess 42 extending in the vertical direction is formed in the upper part of the lock pin 40, and a pair of holes 43 is formed in the side wall surrounding the recess 42. The pair of holes 43 are formed in positions facing each other, and connect the inside of the recess 42 to the outside of the lock pin 40. When viewed from the side, the hole 43 has an oval shape extending in the vertical direction. The block portion 34c of the rod 34 is disposed within the recess 42.

[0019] A through hole 37 extending horizontally is formed in the block portion 34c of the rod 34. The through hole 37 is formed at a position corresponding to a pair of holes 43 of the lock pin 40. A knock pin 38 is inserted into and fixed in the through hole 37. The knock pin 38 has, for example, a cylindrical shape, and extends in a horizontal direction (second direction) that intersects, for example, is perpendicular to, the movement direction (first direction) of the rod 34.

[0020] Both ends of the knock pin 38 are disposed in a pair of holes 43. The width of the knock pin 38 in the horizontal direction is approximately equal to the width of the holes 43, and the length of the knock pin 38 in the up-down direction is shorter than the length of the holes 43. This allows the knock pin 38 to slide up and down within the holes 43. Therefore, the block portion 34c of the rod 34 can move up and down within the recess 42 of the lock pin 40. As a result, the lock pin 40 can reciprocate up and down relative to the rod 34 within a certain range.

[0021] The lock pin 40 is restricted from moving horizontally relative to the parent cart 10, but as will be described later, it is allowed to move up and down within a certain range. The position of the parent cart 10 is fixed when the lock pin 40 moves downward and is inserted into a receiving seat 103 formed on the floor 101. When the lock pin 40 moves upward and comes out of the receiving seat 103, the parent cart 10 is released from its fixed position.

[0022] 4, in the limit switch 50, an actuator 52 protrudes from a switch unit 51 fixed to a floor 101. The actuator 52 is rotatable around the switch unit 51. When no external force is applied to the actuator 52, the actuator 52 stands upright, for example, pointing straight up.

[0023] The striker 53 fixed to the parent cart 10 is positioned so as to press the tip of the actuator 52 horizontally when the parent cart 10 reaches a predetermined position on the rail 102. The striker 53 is provided with, for example, a horizontal plate 53a, and a pair of inclined plates 53b extending diagonally upward from both ends of the horizontal plate 53a. The pair of inclined plates 53b are arranged in the direction of movement of the parent cart 10, which is the width direction of the steel plate 200. The actuator 52 rotates when pressed by the inclined plates 53b of the striker 53, thereby switching the switch unit 51. As a result, the drive means 15 of the parent cart 10 is stopped, and the movement of the parent cart 10 is stopped.

[0024] Next, the operation of the locking device-equipped truck 1 according to this embodiment will be described. 5(a) to 5(d) are diagrams showing the downward movement of the lock pin. 6(a) and (b) are diagrams showing the operation of the lock pin moving upward.

[0025] As shown in Fig. 1, when a rolling line (not shown) is rolling a steel plate 200, the parent car 10 is retracted to a position away from the rolling line. Also, as shown in Fig. 5(a), in the air cylinder 30, the solenoid valve 31 supplies air to the piping 36, and the disk portion 34a of the rod 34 is located at the upper part within the housing 33. Furthermore, both ends of the knock pin 38 are located above the hole 43 of the lock pin 40. As a result, the lower end of the lock pin 40 is located above the floor 101, and does not restrict the movement of the parent car 10.

[0026] When the rolling line stops and the thickness profile of the steel plate 200 is measured, the parent cart 10 drives the driving means 15 to travel on the rails 102 and move to a position where the steel plate 200 can be measured by the X-ray thickness gauge 13. When the parent cart 10 reaches a predetermined position, as shown in FIG. 4, the inclined plate 53b on the front side of the striker 53 comes into contact with the actuator 52 of the limit switch 50 and presses the actuator 52. This causes the actuator 52 to rotate, switching the switch unit 51 and stopping the driving means 15. This causes the parent cart 10 to stop at a predetermined position. At this time, an error may occur in the stopping position of the parent cart 10.

[0027] 5(b), the solenoid valve 31 switches and supplies air to the piping 35. As a result, the disc portion 34a of the rod 34 moves downward due to the air pressure difference, and the block portion 34c and the knock pin 38 also move downward. If the position of the lock pin 40 is slightly misaligned with respect to the receiving seat 103, the side surface of the tapered portion 41 of the lock pin 40 will come into contact with the upper edge of the receiving seat 103.

[0028] At this time, although the side surface of the tapered portion 41 of the lock pin 40 receives an upward force from the upper edge of the receiving seat 103, the knock pin 38 slides downward within the hole 43, and the lock pin 40 moves upward relative to the knock pin 38. As a result, the force transmitted to the rod 34 by the air cylinder 30 is alleviated by the sliding of the knock pin 38, and the lock pin 40 moves slowly downward with a weak downward force. This causes the side surface of the tapered portion 41 to slide slowly against the upper edge of the receiving seat 103, and the position of the lock pin 40 in the horizontal direction is corrected in a self-aligning manner. Accordingly, the position of the parent cart 10 is also corrected.

[0029] As shown in Figure 5(c), when the rod 34 moves further downward and the knock pin 38 reaches the lower end of the hole 43, the force transmitted to the rod 34 by the air cylinder 30 is not reduced but is transmitted directly to the lock pin 40, causing the lock pin 40 to move downward with a strong force.

[0030] 5(d), the lock pin 40 is stored in the receiving seat 103, and the horizontal position is locked. As a result, the position of the parent cart 10 is also locked. After that, the solenoid valve 31 may be switched to stop the supply of air to the piping 35.

[0031] Next, as shown in Fig. 1, the moving means 12 is driven to move the child carriage 11 on the parent carriage 10. The moving means 12 moves the child carriage 11 by a predetermined distance and then stops it. Then, while the child carriage 11 is stopped, the X-ray thickness gauge 13 irradiates the steel plate 200 with X-rays and detects the X-rays that have passed through the steel plate 200, thereby measuring the thickness of the steel plate 200. In this way, while the child carriage 11 is repeatedly moved and stopped, the X-ray thickness gauge 13 measures the thickness of the steel plate 200, thereby obtaining a thickness profile in the width direction of the steel plate 200.

[0032] When the moving means 12 starts moving the child cart 11 and when it stops the child cart 11, a reaction force is applied from the moving means 12 to the parent cart 10, but because the parent cart 10 is fixed by the lock pin 40 and the receiving seat 103, unintentional movement of the parent cart 10 can be prevented. As a result, the X-ray thickness gauge 13 can measure a thickness profile with high accuracy.

[0033] After the thickness profile measurement is completed, as shown in Figure 6(a), the solenoid valve 31 of the air cylinder 30 switches to supply air to the piping 36. This causes the disc portion 34a of the rod 34 to move upward due to the air pressure difference, and along with this, the block portion 34c and the knock pin 38 also move upward. At this time, the lock pin 40 also moves upward with a weak force.

[0034] 6(b), when the lock pin 40 reaches the upper end of its movable range, the lock pin 40 cannot move any further, and the knock pin 38 slides upward within the hole 43. Then, the knock pin 38 reaches the upper end of the hole 43. In this way, the lock pin 40 is ejected from the receiving seat 103, and the parent cart 10 is unlocked.

[0035] 1, the driving means 15 is driven to move the main cart 10 in a direction away from the steel plate 200. Thereafter, the rolling line is operated, and rolling of the steel plate 200 is resumed.

[0036] Next, the effects of this embodiment will be described. In this embodiment, the locking device-equipped carriage 1 is provided with a limit switch 50 and a locking device 20, so that when the parent carriage 10 reaches a predetermined position, the limit switch 50 can automatically stop the parent carriage 10, and the locking device 20 can automatically insert the lock pin 40 into the receiving seat 103. Furthermore, after the thickness profile of the steel plate 200 is obtained, the locking device 20 can automatically remove the lock pin 40 from the receiving seat 103. This reduces the effort and time required compared to when an operator manually inserts and removes the lock pin.

[0037] Furthermore, in this embodiment, the tip of the lock pin 40 is a tapered portion 41. As a result, even if the position of the lock pin 40 is slightly misaligned from the receiving seat 103, the side surface of the tapered portion 41 comes into contact with the upper edge of the receiving seat 103. Thereafter, by pushing the lock pin 40 downward, the position of the lock pin 40 in the horizontal direction can be corrected in a self-aligning manner. As a result, the position of the parent cart 10 in the horizontal direction can also be corrected.

[0038] Furthermore, in this embodiment, since the rod 34 and the lock pin 40 are connected via the knock pin 38 and the hole 43, while the knock pin 38 slides within the hole 43, the entire force applied by the air cylinder 30 to the rod 34 is not transmitted to the lock pin 40, and the lock pin 40 can be moved with a weak force. As a result, even if the position of the lock pin 40 is slightly misaligned from the receiving seat 103 and the side surface of the tapered portion 41 comes into contact with the upper edge of the receiving seat 103, the impact transmitted from the receiving seat 103 to the lock pin 40 can be suppressed, and the lock pin 40 can be smoothly guided into the receiving seat 103. As a result, the lock pin 40 can be prevented from being forcibly pushed into the receiving seat 103 before the position of the parent cart 10 is corrected and getting stuck in the receiving seat 103. In addition, the parent cart 10 can be prevented from moving excessively due to the impact of the lock pin 40 colliding with the upper edge or side surface of the receiving seat 103.

[0039] Although the present embodiment illustrates an example in which the tip of the lock pin 40 has the tapered portion 41, the shape of the tip of the lock pin 40 is not limited to a tapered shape. However, it is preferable that the tip of the lock pin 40 becomes thinner as it approaches the tip. For example, the tip of the lock pin 40 may be hemispherical or conical. Furthermore, the present embodiment illustrates an example in which the receiving seat 103 is provided on the floor 101 of the factory, but this is not limiting and the receiving seat 103 may be provided on a wall or ceiling of the factory. Furthermore, the present embodiment illustrates an example in which the switch unit 51 and the actuator 52 of the limit switch 50 are provided on the floor 101 and the striker 53 is provided on the parent cart 10. However, the striker 53 may be provided on the floor 101 and the switch unit 51 and the actuator 52 may be provided on the parent cart 10. Furthermore, the striker 53 or the switch unit 51 and the actuator 52 may be provided on the underside of the parent cart 10 instead of on the side surface.

[0040] <Second embodiment> Next, a second embodiment will be described. FIG. 7 is a diagram showing a carriage with a locking device according to this embodiment. 8(a) and (b) are diagrams showing the air cylinder in this embodiment.

[0041] As shown in Fig. 7, in this embodiment, rails 106 are installed on a ceiling 105 of a factory, and the locking device-equipped cart 2 according to this embodiment is movable while suspended from the rails 106. A locking rail 107 is also provided in the factory. The rails 106 and 107 extend in the width direction of the steel plate 200. Furthermore, a switch unit 51 and an actuator 52 of a limit switch 50 are provided on the ceiling 105. The actuator 52 protrudes downward from the switch unit 51.

[0042] The locking dolly 2 is provided with a dolly 16. The dolly 16 has a drive means 15 and is capable of reciprocating along a rail 106. A striker 53 of a limit switch 50 is fixed to the side of the dolly 16. The limit switch 50 is made up of a switch unit 51 and an actuator 52 fixed to the ceiling 105, and the striker 53 fixed to the dolly 16. The limit switch 50 stops the dolly 16 when it reaches a predetermined position on the rail 106. The striker 53 has a pair of inclined plates 53b extending diagonally downward from both ends of a horizontal plate 53a.

[0043] An X-ray thickness gauge 13 is mounted on the cart 16. In this embodiment, unlike the first embodiment, the X-ray thickness gauge 13 is mounted directly on the cart 16 without a subcart and is fixed to the cart 16. A locking device 60 is also provided on the cart 16. The locking device 60 is provided with an air cylinder 70 and a pair of locking members 80. The configuration of the locking device 60 will be described below.

[0044] 8(a) and 8(b), an air cylinder 70 is provided with a solenoid valve 71, a pipe 72 that supplies air to the solenoid valve 71, a pair of housings 73, a rod 74 that can reciprocate relative to each housing 73, and pipes 75 and 76 that supply air from the solenoid valve 71 to each housing 73. The solenoid valve 71 switches between supplying air from the pipe 72 to the pair of pipes 75, the pair of pipes 76, or to neither the pipes 75 nor 76. The air cylinder 70 is provided with only one solenoid valve 71 and one pipe 72, and two each of the housing 73, the rod 74, the pipes 75, and the pipes 76.

[0045] The housing 73 is, for example, substantially cylindrical in shape. One end face of the housing 73 is sealed, and a shaft portion 74b of a rod 74 is inserted into the other end face. Each rod 74 is provided with a disk portion 74a arranged inside the housing 73, a shaft portion 74b connected to the disk portion 74a and connecting the inside and outside of the housing 73, and a joint portion 74c connected to the shaft portion 74b and arranged outside the housing 73. The disk portion 74a is movable while airtightly dividing the inside of the housing 73. The pair of housings 73 are arranged so that the end faces through which the shaft portions 74b are inserted face each other. A locking member 80 is attached to the joint portion 74c of each rod 74.

[0046] The direction of movement of rod 74 is horizontal, set to a direction perpendicular to the direction in which rails 106 and 107 extend. Furthermore, the pair of locking members 80 are disposed in positions sandwiching locking rail 107. When solenoid valve 71 supplies air to pipe 75, rod 74 moves in a direction protruding from housing 73 due to the difference in air pressure. As a result, the pair of locking members 80 approach each other and sandwich rail 107. On the other hand, when solenoid valve 71 supplies air to pipe 76, rod 74 moves in a direction retracting into housing 73 due to the difference in air pressure. As a result, the pair of locking members 80 move away from each other and also from rail 107.

[0047] Next, the operation of the locking device-equipped carriage 2 according to this embodiment will be described. As shown in Figure 7, when a rolling line (not shown) is rolling a steel plate 200, the carriage 16 is retracted to a position away from the rolling line. At this time, as shown in Figure 8(a), in the air cylinder 70, the solenoid valve 71 supplies air to the pipe 76 or does not supply air to either the pipes 75 or 76, and the locking member 80 is away from the rail 107. Therefore, the locking device 60 does not restrict the movement of the carriage 16.

[0048] When the rolling line stops and the thickness profile of the steel plate 200 is measured, the carriage 16 drives the driving means 15 to move while suspended from the rail 106. When the carriage 16 reaches a predetermined position, the inclined plate 53b on the front side of the striker 53 comes into contact with the actuator 52 of the limit switch 50 and presses the actuator 52. This causes the actuator 52 to rotate, switching the switch unit 51 and stopping the driving means 15. This causes the carriage 16 to stop at the predetermined position.

[0049] Next, as shown in Figure 8(b), the solenoid valve 71 switches and supplies air to the pipe 75. This causes the disc portions 74a of the pair of rods 74 to move due to the air pressure difference, and the pair of locking members 80 move in directions approaching each other, sandwiching the rail 107. This locks the position of the cart 16.

[0050] 7, the X-ray thickness gauge 13 measures the thickness profile of the steel plate 200. While the X-ray thickness gauge 13 is measuring the thickness profile, the solenoid valve 71 continues to supply air to the pipe 75, and continues to clamp the rail 107.

[0051] After the thickness profile measurement is completed, as shown in FIG. 8(a), the solenoid valve 71 of the air cylinder 70 is switched to supply air to the pair of pipes 76. This causes the disc portion 74a of the rod 74 to move due to the air pressure difference, and the pair of locking members 80 moves away from the rails 107. As a result, the carriage 16 is unlocked. Thereafter, the solenoid valve 71 may be switched so that air is not supplied to either the pipes 75 or 76.

[0052] 7, the driving means 15 is driven to move the carriage 16 in a direction away from the steel plate 200. Thereafter, the rolling line is operated, and rolling of the steel plate 200 is resumed.

[0053] Next, the effects of this embodiment will be described. In this embodiment, the locking device-equipped carriage 2 is provided with a limit switch 50 and a locking device 60, so that when the carriage 16 reaches a predetermined position, the limit switch 50 can automatically stop the carriage 16. In addition, the locking device 60 can automatically clamp the rail 107 between the pair of locking members 80. Furthermore, after the thickness profile of the steel plate 200 is obtained, the locking device 60 can automatically release the pair of locking members 80 from the rail 107. This reduces the effort and time required compared to when an operator manually locks the carriage 16.

[0054] Furthermore, in the locking device 60, the pair of locking members 80 sandwich the rail 107 in a direction perpendicular to the direction in which the rail 107 extends. This allows the cart 16 to be locked without any problems even if the position of the cart 16 is slightly deviated from the intended stopping position.

[0055] Alternatively, the thickness profile of the steel plate 200 may be obtained by repeatedly moving and stopping the carriage 16 in small increments, and the X-ray thickness gauge 13 measuring the thickness of a portion of the steel plate 200 each time the carriage 16 stops. In this case, the locking device 60 locks the carriage 16 each time the carriage 16 stops, thereby preventing the carriage 16 from moving during thickness measurement and allowing a highly accurate thickness profile to be obtained. In this case, the carriage 16 can be locked and unlocked in a short time compared to a method in which a lock pin is inserted and removed from a receiving seat, and the thickness profile can be obtained in a short time. Other configurations, operations, and effects of this embodiment are the same as those of the first embodiment.

[0056] According to the embodiment described above, it is possible to realize a cart equipped with a locking device that can be automatically secured.

[0057] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention and its equivalents as set forth in the claims. Furthermore, the above-described embodiments can also be implemented in combination with each other. [Explanation of symbols]

[0058] 1, 2: Cart with locking device 10: Main trolley 11: Child trolley 12: Transportation 13: X-ray thickness gauge 15: Driving means 16: Cart 20: Locking device 30: Air cylinder 31: Solenoid valve 32: Piping 33: Cabinet 34: Rod 34a: Disc part 34b: Shaft part 34c: Block section 35, 36: Piping 37:Through hole 38: Knock pin 40: Lock pin 41: Tapered section 42: Recess 43: Hole 50: Limit switch 51: Switch section 52: Actuator 53: Striker 53a: Horizontal board 53b: Inclined plate 60: Locking device 70: Air cylinder 71: Solenoid valve 72: Piping 73: Cabinet 74: Rod 74a:Disc part 74b: Shaft 74c: Joint 75, 76: Piping 80: Locking member 101:Floor 102: Rail 103: Receptacle 105: Ceiling 106: Rail 107: Fixing rail 200: Steel plate

Claims

1. A trolley and a limit switch that stops the carriage when the carriage reaches a predetermined position; An air cylinder; a lock pin that can be reciprocated along a first direction by the air cylinder; a knock pin extending in a second direction intersecting the first direction; Equipped with The air cylinder is a housing into which air is injected and exhausted; a rod that can reciprocate relative to the housing by the air; and The knock pin is fixed to the rod, The lock pin has a hole formed therein, the knock pin is slidable within the hole along the first direction, The tip of the lock pin becomes thinner as it approaches the tip, A dolly with a locking device in which the position of the dolly is fixed by inserting the lock pin into the receiving seat.

2. 2. The cart with a locking device according to claim 1, wherein the tip of the lock pin has a tapered shape that becomes thinner as it approaches the tip.

3. 3. The cart with a locking device according to claim 1, further comprising an X-ray thickness gauge mounted on the cart.

4. a sub-carriage mounted on the cart and movable relative to the cart; a moving means fixed to the carriage for moving the child carriage; Furthermore, 4. The cart with a locking device according to claim 3, wherein the X-ray thickness gauge is mounted on the child cart.

Images